Folder fixes

2026-05-18 14:57:25 +10:00
parent f461a05c65
commit 1d4eb7a34c
47 changed files with 28243 additions and 1211 deletions
--- a/src/video/DeckLinkAPI_h.h
+++ b/src/video/DeckLinkAPI_h.h
--- a/src/video/DeckLinkAPI_i.c
+++ b/src/video/DeckLinkAPI_i.c
@@ -0,0 +1,486 @@
+
+
+/* this ALWAYS GENERATED file contains the IIDs and CLSIDs */
+
+/* link this file in with the server and any clients */
+
+
+ /* File created by MIDL compiler version 8.01.0628 */
+/* at Tue Jan 19 14:14:07 2038
+ */
+/* Compiler settings for ..\..\3rdParty\Blackmagic DeckLink SDK 16.0\Win\include\DeckLinkAPI.idl:
+    Oicf, W1, Zp8, env=Win64 (32b run), target_arch=AMD64 8.01.0628 
+    protocol : all , ms_ext, c_ext, robust
+    error checks: allocation ref bounds_check enum stub_data 
+    VC __declspec() decoration level: 
+         __declspec(uuid()), __declspec(selectany), __declspec(novtable)
+         DECLSPEC_UUID(), MIDL_INTERFACE()
+*/
+/* @@MIDL_FILE_HEADING(  ) */
+
+
+
+#ifdef __cplusplus
+extern "C"{
+#endif 
+
+
+#include <rpc.h>
+#include <rpcndr.h>
+
+#ifdef _MIDL_USE_GUIDDEF_
+
+#ifndef INITGUID
+#define INITGUID
+#include <guiddef.h>
+#undef INITGUID
+#else
+#include <guiddef.h>
+#endif
+
+#define MIDL_DEFINE_GUID(type,name,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8) \
+        DEFINE_GUID(name,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8)
+
+#else // !_MIDL_USE_GUIDDEF_
+
+#ifndef __IID_DEFINED__
+#define __IID_DEFINED__
+
+typedef struct _IID
+{
+    unsigned long x;
+    unsigned short s1;
+    unsigned short s2;
+    unsigned char  c[8];
+} IID;
+
+#endif // __IID_DEFINED__
+
+#ifndef CLSID_DEFINED
+#define CLSID_DEFINED
+typedef IID CLSID;
+#endif // CLSID_DEFINED
+
+#define MIDL_DEFINE_GUID(type,name,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8) \
+        EXTERN_C __declspec(selectany) const type name = {l,w1,w2,{b1,b2,b3,b4,b5,b6,b7,b8}}
+
+#endif // !_MIDL_USE_GUIDDEF_
+
+MIDL_DEFINE_GUID(IID, LIBID_DeckLinkAPI,0xD864517A,0xEDD5,0x466D,0x86,0x7D,0xC8,0x19,0xF1,0xC0,0x52,0xBB);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkTimecode,0xBC6CFBD3,0x8317,0x4325,0xAC,0x1C,0x12,0x16,0x39,0x1E,0x93,0x40);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkDisplayModeIterator,0x9C88499F,0xF601,0x4021,0xB8,0x0B,0x03,0x2E,0x4E,0xB4,0x1C,0x35);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkDisplayMode,0x3EB2C1AB,0x0A3D,0x4523,0xA3,0xAD,0xF4,0x0D,0x7F,0xB1,0x4E,0x78);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLink,0xC418FBDD,0x0587,0x48ED,0x8F,0xE5,0x64,0x0F,0x0A,0x14,0xAF,0x91);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkConfiguration,0x5a68ffd4,0x1c12,0x4ede,0xa6,0xd2,0x45,0x45,0x1d,0x38,0x5f,0xc1);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkEncoderConfiguration,0x138050E5,0xC60A,0x4552,0xBF,0x3F,0x0F,0x35,0x80,0x49,0x32,0x7E);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkDeckControlStatusCallback,0x53436FFB,0xB434,0x4906,0xBA,0xDC,0xAE,0x30,0x60,0xFF,0xE8,0xEF);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkDeckControl,0x8E1C3ACE,0x19C7,0x4E00,0x8B,0x92,0xD8,0x04,0x31,0xD9,0x58,0xBE);
+
+
+MIDL_DEFINE_GUID(IID, IID_IBMDStreamingDeviceNotificationCallback,0xF9531D64,0x3305,0x4B29,0xA3,0x87,0x7F,0x74,0xBB,0x0D,0x0E,0x84);
+
+
+MIDL_DEFINE_GUID(IID, IID_IBMDStreamingH264InputCallback,0x823C475F,0x55AE,0x46F9,0x89,0x0C,0x53,0x7C,0xC5,0xCE,0xDC,0xCA);
+
+
+MIDL_DEFINE_GUID(IID, IID_IBMDStreamingDiscovery,0x2C837444,0xF989,0x4D87,0x90,0x1A,0x47,0xC8,0xA3,0x6D,0x09,0x6D);
+
+
+MIDL_DEFINE_GUID(IID, IID_IBMDStreamingVideoEncodingMode,0x1AB8035B,0xCD13,0x458D,0xB6,0xDF,0x5E,0x8F,0x7C,0x21,0x41,0xD9);
+
+
+MIDL_DEFINE_GUID(IID, IID_IBMDStreamingMutableVideoEncodingMode,0x19BF7D90,0x1E0A,0x400D,0xB2,0xC6,0xFF,0xC4,0xE7,0x8A,0xD4,0x9D);
+
+
+MIDL_DEFINE_GUID(IID, IID_IBMDStreamingVideoEncodingModePresetIterator,0x7AC731A3,0xC950,0x4AD0,0x80,0x4A,0x83,0x77,0xAA,0x51,0xC6,0xC4);
+
+
+MIDL_DEFINE_GUID(IID, IID_IBMDStreamingDeviceInput,0x24B6B6EC,0x1727,0x44BB,0x98,0x18,0x34,0xFF,0x08,0x6A,0xCF,0x98);
+
+
+MIDL_DEFINE_GUID(IID, IID_IBMDStreamingH264NALPacket,0xE260E955,0x14BE,0x4395,0x97,0x75,0x9F,0x02,0xCC,0x0A,0x9D,0x89);
+
+
+MIDL_DEFINE_GUID(IID, IID_IBMDStreamingAudioPacket,0xD9EB5902,0x1AD2,0x43F4,0x9E,0x2C,0x3C,0xFA,0x50,0xB5,0xEE,0x19);
+
+
+MIDL_DEFINE_GUID(IID, IID_IBMDStreamingMPEG2TSPacket,0x91810D1C,0x4FB3,0x4AAA,0xAE,0x56,0xFA,0x30,0x1D,0x3D,0xFA,0x4C);
+
+
+MIDL_DEFINE_GUID(IID, IID_IBMDStreamingH264NALParser,0x5867F18C,0x5BFA,0x4CCC,0xB2,0xA7,0x9D,0xFD,0x14,0x04,0x17,0xD2);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CBMDStreamingDiscovery,0x23A4EDF5,0xA0E5,0x432C,0x94,0xEF,0x3B,0xAB,0xB5,0xF8,0x1C,0x82);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CBMDStreamingH264NALParser,0x7753EFBD,0x951C,0x407C,0x97,0xA5,0x23,0xC7,0x37,0xB7,0x3B,0x52);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoOutputCallback,0x5BE6DF26,0x02CE,0x433E,0x99,0xD9,0x9A,0x87,0xC3,0xAC,0x17,0x1F);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkInputCallback,0x3A94F075,0xC37D,0x4BA8,0xBC,0xC0,0x1D,0x77,0x8C,0x8F,0x88,0x1B);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkEncoderInputCallback,0xACF13E61,0xF4A0,0x4974,0xA6,0xA7,0x59,0xAF,0xF6,0x26,0x8B,0x31);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoBufferAllocator,0xF35DFA8D,0x9078,0x4622,0x95,0xBB,0x56,0x89,0x40,0x54,0xEB,0x0F);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoBufferAllocatorProvider,0x6DF6F20A,0xD8DF,0x45D2,0x89,0x14,0x38,0x3C,0xE7,0xE6,0x24,0x3F);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkAudioOutputCallback,0x403C681B,0x7F46,0x4A12,0xB9,0x93,0x2B,0xB1,0x27,0x08,0x4E,0xE6);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkIterator,0x50FB36CD,0x3063,0x4B73,0xBD,0xBB,0x95,0x80,0x87,0xF2,0xD8,0xBA);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkAPIInformation,0x7BEA3C68,0x730D,0x4322,0xAF,0x34,0x8A,0x71,0x52,0xB5,0x32,0xA4);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkIPFlowAttributes,0xCDA938DA,0x6479,0x40C6,0xB2,0xEC,0xA3,0x57,0x9B,0x3A,0xEE,0xCD);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkIPFlowStatus,0x31C41656,0x4992,0x4396,0xBB,0xE9,0x5F,0x84,0x06,0xAA,0xB5,0xAF);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkIPFlowSetting,0x86DD9174,0x27D3,0x4032,0xB2,0xAD,0x60,0x67,0xC3,0xBB,0x24,0x24);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkIPFlow,0xC5FC83C7,0x5B8E,0x42A7,0x9A,0x40,0x7C,0x06,0x59,0x55,0xD4,0xE1);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkIPFlowIterator,0xBD296AB2,0xA5C5,0x4153,0x88,0x8F,0xAA,0xB1,0xFD,0xBD,0x8A,0x5C);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkOutput,0x5F227C95,0x39D7,0x46C7,0x8B,0x7D,0x9C,0x81,0x79,0x5F,0xBB,0xE4);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkInput,0x6A515F8A,0xFBCE,0x4853,0xB0,0xF7,0x2A,0x09,0xDB,0x1E,0xCA,0x0B);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkIPExtensions,0x46CF7903,0xA9FD,0x4D0B,0x8F,0xFC,0x01,0x03,0x72,0x2A,0xB4,0x42);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkHDMIInputEDID,0xABBBACBC,0x45BC,0x4665,0x9D,0x92,0xAC,0xE6,0xE5,0xA9,0x79,0x02);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkEncoderInput,0x46C1332E,0x6FD9,0x472A,0x85,0x91,0xFE,0x59,0xC2,0x21,0x92,0xE1);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoBuffer,0x81F03D70,0xDE13,0x4B17,0x87,0x3A,0xC8,0xAC,0x96,0x89,0xC6,0x82);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoFrame,0x6502091C,0x615F,0x4F51,0xBA,0xF6,0x45,0xC4,0x25,0x6D,0xD5,0xB0);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkMutableVideoFrame,0xCF9EB134,0x0374,0x4C5B,0x95,0xFA,0x1E,0xC1,0x48,0x19,0xFF,0x62);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoFrame3DExtensions,0xD4DBE9C6,0xB4D2,0x49D3,0xAB,0xF2,0xB4,0xE8,0x6C,0x73,0x91,0xB0);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoFrameMetadataExtensions,0xE232A5B7,0x4DB4,0x44C9,0x91,0x52,0xF4,0x7C,0x12,0xE5,0xF0,0x51);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoFrameMutableMetadataExtensions,0xCC198FC6,0x8298,0x4419,0x94,0x2D,0x83,0x57,0xEC,0x35,0x5E,0x58);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoInputFrame,0xC9ADD3D2,0xBE52,0x488D,0xAB,0x2D,0x7F,0xDE,0xF7,0xAF,0x0C,0x95);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkAncillaryPacket,0xF5C0D498,0x5CD3,0x4C77,0x97,0x73,0x8E,0xFA,0x20,0xBB,0x33,0x4B);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkAncillaryPacketIterator,0x10F1AA88,0x54BE,0x42F7,0xB9,0xF8,0xEC,0x2F,0x5F,0x09,0x95,0x51);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoFrameAncillaryPackets,0x8A72D630,0x8070,0x4D05,0x8A,0x93,0xE6,0x0C,0x40,0xEE,0x08,0x8A);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoFrameAncillary,0x732E723C,0xD1A4,0x4E29,0x9E,0x8E,0x4A,0x88,0x79,0x7A,0x00,0x04);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkEncoderPacket,0xB693F36C,0x316E,0x4AF1,0xB6,0xC2,0xF3,0x89,0xA4,0xBC,0xA6,0x20);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkEncoderVideoPacket,0x4E7FD944,0xE8C7,0x4EAC,0xB8,0xC0,0x7B,0x77,0xF8,0x0F,0x5A,0xE0);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkEncoderAudioPacket,0x49E8EDC8,0x693B,0x4E14,0x8E,0xF6,0x12,0xC6,0x58,0xF5,0xA0,0x7A);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkH265NALPacket,0x639C8E0B,0x68D5,0x4BDE,0xA6,0xD4,0x95,0xF3,0xAE,0xAF,0xF2,0xE7);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkAudioInputPacket,0xE43D5870,0x2894,0x11DE,0x8C,0x30,0x08,0x00,0x20,0x0C,0x9A,0x66);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkScreenPreviewCallback,0xD4FA2345,0x9FBA,0x4497,0x95,0xC3,0xC0,0xC3,0xCE,0xD3,0xCD,0xA8);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkGLScreenPreviewHelper,0xCEB778E2,0xC202,0x4EC8,0x90,0x85,0x0C,0xD2,0x85,0xCC,0x55,0x22);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkDX9ScreenPreviewHelper,0xF2DD78CA,0x2921,0x4AC2,0xB5,0xBC,0xBF,0xDC,0xC2,0x03,0x5A,0x1F);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkWPFDX9ScreenPreviewHelper,0xC59346CD,0x9326,0x4266,0xAC,0x2D,0x5C,0x19,0x0F,0x57,0x99,0xEE);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkNotificationCallback,0xb002a1ec,0x070d,0x4288,0x82,0x89,0xbd,0x5d,0x36,0xe5,0xff,0x0d);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkNotification,0x1d70faac,0xfd27,0x4866,0x9d,0xe6,0x09,0x39,0xd1,0xe4,0xc7,0xf1);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkProfileAttributes,0xF47551D7,0xAD22,0x47AF,0xBC,0xFD,0x6B,0xE8,0x8A,0xA8,0x79,0xD9);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkProfileIterator,0x29E5A8C0,0x8BE4,0x46EB,0x93,0xAC,0x31,0xDA,0xAB,0x5B,0x7B,0xF2);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkProfile,0x16093466,0x674A,0x432B,0x9D,0xA0,0x1A,0xC2,0xC5,0xA8,0x24,0x1C);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkProfileCallback,0xA4F9341E,0x97AA,0x4E04,0x89,0x35,0x15,0xF8,0x09,0x89,0x8C,0xEA);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkProfileManager,0x30D41429,0x3998,0x4B6D,0x84,0xF8,0x78,0xC9,0x4A,0x79,0x7C,0x6E);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkStatistics,0x21CB2ED1,0x4429,0x42BE,0xAA,0xF3,0x22,0xA3,0xB1,0xDD,0x3A,0xE0);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkStatus,0x2A04A635,0xED42,0x41EF,0x93,0x42,0x0E,0x11,0xF8,0xCF,0x6B,0x5E);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkKeyer,0x89AFCAF5,0x65F8,0x421E,0x98,0xF7,0x96,0xFE,0x5F,0x5B,0xFB,0xA3);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoConversion,0x94C536D6,0xC821,0x42F5,0xA6,0x00,0xC6,0x66,0x29,0x95,0x51,0x01);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkDeviceNotificationCallback,0x4997053B,0x0ADF,0x4CC8,0xAC,0x70,0x7A,0x50,0xC4,0xBE,0x72,0x8F);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkDiscovery,0xCDBF631C,0xBC76,0x45FA,0xB4,0x4D,0xC5,0x50,0x59,0xBC,0x61,0x01);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkIterator,0xBA6C6F44,0x6DA5,0x4DCE,0x94,0xAA,0xEE,0x2D,0x13,0x72,0xA6,0x76);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkAPIInformation,0x263CA19F,0xED09,0x482E,0x9F,0x9D,0x84,0x00,0x57,0x83,0xA2,0x37);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkGLScreenPreviewHelper,0x1E332DAE,0x0D04,0x49EB,0xB8,0xA1,0xB6,0xE0,0x0B,0x2B,0x6B,0xD0);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkGL3ScreenPreviewHelper,0x166804E4,0x15EF,0x4BFD,0xB6,0x23,0xB5,0xBA,0x92,0x16,0x67,0xC5);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkDX9ScreenPreviewHelper,0x0EB111ED,0xADA6,0x43A6,0x8B,0x16,0xCA,0x5D,0x27,0xEE,0xA1,0x5E);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkWPFDX9ScreenPreviewHelper,0x5E64496D,0x4BB2,0x45D5,0x9B,0x63,0xBF,0x1B,0x46,0x3B,0x18,0xAF);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkVideoConversion,0x771AD62D,0x671F,0x4442,0xAC,0x90,0xB0,0x70,0xC5,0x41,0x09,0x0A);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkDiscovery,0x22FBFC33,0x8D07,0x495C,0xA5,0xBF,0xDA,0xB5,0xEA,0x9B,0x82,0xDB);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkVideoFrameAncillaryPackets,0x6F47097E,0xB390,0x4650,0xBC,0xB6,0xC4,0xD5,0x2F,0xAA,0x16,0x43);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkStatus_v15_3_1,0x5F558200,0x4028,0x49BC,0xBE,0xAC,0xDB,0x3F,0xA4,0xA9,0x6E,0x46);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkConfiguration_v15_3_1,0x912F634B,0x2D4E,0x40A4,0x8A,0xAB,0x8D,0x80,0xB7,0x3F,0x12,0x89);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoBuffer_v15_3_1,0xCCB4B64A,0x5C86,0x4E02,0xB7,0x78,0x88,0x5D,0x35,0x27,0x09,0xFE);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoBufferAllocator_v15_3_1,0x3481A4DF,0x2B11,0x4E55,0xAC,0x61,0x83,0x6B,0x87,0x98,0x5E,0x9A);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoBufferAllocatorProvider_v15_3_1,0x08B80403,0xBFF2,0x49D0,0xB4,0x48,0x8C,0x90,0x8B,0x9E,0x9F,0xC9);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkInput_v15_3_1,0x4095DB82,0xE294,0x4B8C,0xAA,0xA8,0x3B,0x9E,0x80,0xC4,0x93,0x36);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkOutput_v15_3_1,0x1A8077F1,0x9FE2,0x4533,0x81,0x47,0x22,0x94,0x30,0x5E,0x25,0x3F);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoConversion_v15_3_1,0xA48755D9,0x8BD5,0x4727,0xA1,0xE9,0x06,0x9F,0xDE,0xDB,0xA6,0xE9);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkNotification_v15_3_1,0xB85DF4C8,0xBDF5,0x47C1,0x80,0x64,0x28,0x16,0x2E,0xBD,0xD4,0xEB);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkVideoConversion_v15_3_1,0x89BA47BD,0x1FE2,0x4D76,0x9B,0xFE,0xDE,0x85,0x04,0x9C,0x49,0x87);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkProfileAttributes_v15_3_1,0x17D4BF8E,0x4911,0x473A,0x80,0xA0,0x73,0x1C,0xF6,0xFF,0x34,0x5B);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoOutputCallback_v14_2_1,0x20AA5225,0x1958,0x47CB,0x82,0x0B,0x80,0xA8,0xD5,0x21,0xA6,0xEE);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkInputCallback_v14_2_1,0xC6FCE4C9,0xC4E4,0x4047,0x82,0xFB,0x5D,0x23,0x82,0x32,0xA9,0x02);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkMemoryAllocator_v14_2_1,0xB36EB6E7,0x9D29,0x4AA8,0x92,0xEF,0x84,0x3B,0x87,0xA2,0x89,0xE8);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkOutput_v14_2_1,0xBE2D9020,0x461E,0x442F,0x84,0xB7,0xE9,0x49,0xCB,0x95,0x3B,0x9D);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkInput_v14_2_1,0xC21CDB6E,0xF414,0x46E4,0xA6,0x36,0x80,0xA5,0x66,0xE0,0xED,0x37);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkEncoderInput_v14_2_1,0xF222551D,0x13DF,0x4FD8,0xB5,0x87,0x9D,0x4F,0x19,0xEC,0x12,0xC9);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoFrame_v14_2_1,0x3F716FE0,0xF023,0x4111,0xBE,0x5D,0xEF,0x44,0x14,0xC0,0x5B,0x17);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkMutableVideoFrame_v14_2_1,0x69E2639F,0x40DA,0x4E19,0xB6,0xF2,0x20,0xAC,0xE8,0x15,0xC3,0x90);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoFrame3DExtensions_v14_2_1,0xDA0F7E4A,0xEDC7,0x48A8,0x9C,0xDD,0x2D,0xB5,0x1C,0x72,0x9C,0xD7);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoInputFrame_v14_2_1,0x05CFE374,0x537C,0x4094,0x9A,0x57,0x68,0x05,0x25,0x11,0x8F,0x44);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkScreenPreviewCallback_v14_2_1,0xB1D3F49A,0x85FE,0x4C5D,0x95,0xC8,0x0B,0x5D,0x5D,0xCC,0xD4,0x38);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkGLScreenPreviewHelper_v14_2_1,0x504E2209,0xCAC7,0x4C1A,0x9F,0xB4,0xC5,0xBB,0x62,0x74,0xD2,0x2F);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkDX9ScreenPreviewHelper_v14_2_1,0x2094B522,0xD1A1,0x40C0,0x9A,0xC7,0x1C,0x01,0x22,0x18,0xEF,0x02);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkWPFDX9ScreenPreviewHelper_v14_2_1,0xAD8EC84A,0x7DDE,0x11E9,0x8F,0x9E,0x2A,0x86,0xE4,0x08,0x5A,0x59);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoConversion_v14_2_1,0x3BBCB8A2,0xDA2C,0x42D9,0xB5,0xD8,0x88,0x08,0x36,0x44,0xE9,0x9A);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkGLScreenPreviewHelper_v14_2_1,0xF63E77C7,0xB655,0x4A4A,0x9A,0xD0,0x3C,0xA8,0x5D,0x39,0x43,0x43);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkGL3ScreenPreviewHelper_v14_2_1,0x00696A71,0xEBC7,0x491F,0xAC,0x02,0x18,0xD3,0x39,0x3F,0x33,0xF0);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkDX9ScreenPreviewHelper_v14_2_1,0xCC010023,0xE01D,0x4525,0x9D,0x59,0x80,0xC8,0xAB,0x3D,0xC7,0xA0);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkWPFDX9ScreenPreviewHelper_v14_2_1,0xEF2A8478,0x7DDF,0x11E9,0x8F,0x9E,0x2A,0x86,0xE4,0x08,0x5A,0x59);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkVideoConversion_v14_2_1,0x7DBBBB11,0x5B7B,0x467D,0xAE,0xA4,0xCE,0xA4,0x68,0xFD,0x36,0x8C);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkInputCallback_v11_5_1,0xDD04E5EC,0x7415,0x42AB,0xAE,0x4A,0xE8,0x0C,0x4D,0xFC,0x04,0x4A);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkInput_v11_5_1,0x9434C6E4,0xB15D,0x4B1C,0x97,0x9E,0x66,0x1E,0x3D,0xDC,0xB4,0xB9);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkConfiguration_v10_11,0xEF90380B,0x4AE5,0x4346,0x90,0x77,0xE2,0x88,0xE1,0x49,0xF1,0x29);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkAttributes_v10_11,0xABC11843,0xD966,0x44CB,0x96,0xE2,0xA1,0xCB,0x5D,0x31,0x35,0xC4);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkNotification_v10_11,0x0A1FB207,0xE215,0x441B,0x9B,0x19,0x6F,0xA1,0x57,0x59,0x46,0xC5);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkOutput_v10_11,0xCC5C8A6E,0x3F2F,0x4B3A,0x87,0xEA,0xFD,0x78,0xAF,0x30,0x05,0x64);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkInput_v10_11,0xAF22762B,0xDFAC,0x4846,0xAA,0x79,0xFA,0x88,0x83,0x56,0x09,0x95);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkEncoderInput_v10_11,0x270587DA,0x6B7D,0x42E7,0xA1,0xF0,0x6D,0x85,0x3F,0x58,0x11,0x85);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkIterator_v10_11,0x87D2693F,0x8D4A,0x45C7,0xB4,0x3F,0x10,0xAC,0xBA,0x25,0xE6,0x8F);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkDiscovery_v10_11,0x652615D4,0x26CD,0x4514,0xB1,0x61,0x2F,0xD5,0x07,0x2E,0xD0,0x08);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkConfiguration_v10_9,0xCB71734A,0xFE37,0x4E8D,0x8E,0x13,0x80,0x21,0x33,0xA1,0xC3,0xF2);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CBMDStreamingDiscovery_v10_8,0x0CAA31F6,0x8A26,0x40B0,0x86,0xA4,0xBF,0x58,0xDC,0xCA,0x71,0x0C);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkConfiguration_v10_4,0x1E69FCF6,0x4203,0x4936,0x80,0x76,0x2A,0x9F,0x4C,0xFD,0x50,0xCB);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkConfiguration_v10_2,0xC679A35B,0x610C,0x4D09,0xB7,0x48,0x1D,0x04,0x78,0x10,0x0F,0xC0);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkAncillaryPacket_v15_2,0xCC5BBF7E,0x029C,0x4D3B,0x91,0x58,0x60,0x00,0xEF,0x5E,0x36,0x70);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkAncillaryPacketIterator_v15_2,0x3FC8994B,0x88FB,0x4C17,0x96,0x8F,0x9A,0xAB,0x69,0xD9,0x64,0xA7);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoFrameAncillaryPackets_v15_2,0x6C186C0F,0x459E,0x41D8,0xAE,0xE2,0x48,0x12,0xD8,0x1A,0xEE,0x68);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkVideoFrameAncillaryPackets_v15_2,0xF891AD29,0xD0C2,0x46E9,0xA9,0x26,0x4E,0x2D,0x0D,0xD8,0xCF,0xAD);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkVideoFrameMetadataExtensions_v11_5,0xD5973DC9,0x6432,0x46D0,0x8F,0x0B,0x24,0x96,0xF8,0xA1,0x23,0x8F);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkOutput_v11_4,0x065A0F6C,0xC508,0x4D0D,0xB9,0x19,0xF5,0xEB,0x0E,0xBF,0xC9,0x6B);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkInput_v11_4,0x2A88CF76,0xF494,0x4216,0xA7,0xEF,0xDC,0x74,0xEE,0xB8,0x38,0x82);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkIterator_v10_8,0x1F2E109A,0x8F4F,0x49E4,0x92,0x03,0x13,0x55,0x95,0xCB,0x6F,0xA5);
+
+
+MIDL_DEFINE_GUID(CLSID, CLSID_CDeckLinkDiscovery_v10_8,0x1073A05C,0xD885,0x47E9,0xB3,0xC6,0x12,0x9B,0x3F,0x9F,0x64,0x8B);
+
+
+MIDL_DEFINE_GUID(IID, IID_IDeckLinkEncoderConfiguration_v10_5,0x67455668,0x0848,0x45DF,0x8D,0x8E,0x35,0x0A,0x77,0xC9,0xA0,0x28);
+
+#undef MIDL_DEFINE_GUID
+
+#ifdef __cplusplus
+}
+#endif
+
+
+
--- a/src/video/DeckLinkDisplayMode.cpp
+++ b/src/video/DeckLinkDisplayMode.cpp
@@ -0,0 +1,146 @@
+#include "DeckLinkDisplayMode.h"
+
+#include <cctype>
+
+std::string NormalizeModeToken(const std::string& value)
+{
+	std::string normalized;
+	for (unsigned char ch : value)
+	{
+		if (std::isalnum(ch))
+			normalized.push_back(static_cast<char>(std::tolower(ch)));
+	}
+	return normalized;
+}
+
+bool ResolveConfiguredDisplayMode(const std::string& videoFormat, const std::string& frameRate, BMDDisplayMode& displayMode, std::string& displayModeName)
+{
+	VideoFormat videoMode;
+	if (!ResolveConfiguredVideoFormat(videoFormat, frameRate, videoMode))
+		return false;
+
+	displayMode = videoMode.displayMode;
+	displayModeName = videoMode.displayName;
+	return true;
+}
+
+bool ResolveConfiguredVideoFormat(const std::string& videoFormat, const std::string& frameRate, VideoFormat& videoMode)
+{
+	const std::string formatToken = NormalizeModeToken(videoFormat);
+	const std::string frameToken = NormalizeModeToken(frameRate);
+	const std::string combinedToken = formatToken + frameToken;
+
+	struct ModeOption
+	{
+		const char* token;
+		BMDDisplayMode mode;
+		const char* displayName;
+	};
+
+	static const ModeOption options[] =
+	{
+		{ "720p50", bmdModeHD720p50, "720p50" },
+		{ "hd720p50", bmdModeHD720p50, "720p50" },
+		{ "720p5994", bmdModeHD720p5994, "720p59.94" },
+		{ "hd720p5994", bmdModeHD720p5994, "720p59.94" },
+		{ "720p60", bmdModeHD720p60, "720p60" },
+		{ "hd720p60", bmdModeHD720p60, "720p60" },
+		{ "1080i50", bmdModeHD1080i50, "1080i50" },
+		{ "hd1080i50", bmdModeHD1080i50, "1080i50" },
+		{ "1080i5994", bmdModeHD1080i5994, "1080i59.94" },
+		{ "hd1080i5994", bmdModeHD1080i5994, "1080i59.94" },
+		{ "1080i60", bmdModeHD1080i6000, "1080i60" },
+		{ "hd1080i60", bmdModeHD1080i6000, "1080i60" },
+		{ "1080p2398", bmdModeHD1080p2398, "1080p23.98" },
+		{ "hd1080p2398", bmdModeHD1080p2398, "1080p23.98" },
+		{ "1080p24", bmdModeHD1080p24, "1080p24" },
+		{ "hd1080p24", bmdModeHD1080p24, "1080p24" },
+		{ "1080p25", bmdModeHD1080p25, "1080p25" },
+		{ "hd1080p25", bmdModeHD1080p25, "1080p25" },
+		{ "1080p2997", bmdModeHD1080p2997, "1080p29.97" },
+		{ "hd1080p2997", bmdModeHD1080p2997, "1080p29.97" },
+		{ "1080p30", bmdModeHD1080p30, "1080p30" },
+		{ "hd1080p30", bmdModeHD1080p30, "1080p30" },
+		{ "1080p50", bmdModeHD1080p50, "1080p50" },
+		{ "hd1080p50", bmdModeHD1080p50, "1080p50" },
+		{ "1080p5994", bmdModeHD1080p5994, "1080p59.94" },
+		{ "hd1080p5994", bmdModeHD1080p5994, "1080p59.94" },
+		{ "1080p60", bmdModeHD1080p6000, "1080p60" },
+		{ "hd1080p60", bmdModeHD1080p6000, "1080p60" },
+		{ "2160p2398", bmdMode4K2160p2398, "2160p23.98" },
+		{ "4k2160p2398", bmdMode4K2160p2398, "2160p23.98" },
+		{ "2160p24", bmdMode4K2160p24, "2160p24" },
+		{ "4k2160p24", bmdMode4K2160p24, "2160p24" },
+		{ "2160p25", bmdMode4K2160p25, "2160p25" },
+		{ "4k2160p25", bmdMode4K2160p25, "2160p25" },
+		{ "2160p2997", bmdMode4K2160p2997, "2160p29.97" },
+		{ "4k2160p2997", bmdMode4K2160p2997, "2160p29.97" },
+		{ "2160p30", bmdMode4K2160p30, "2160p30" },
+		{ "4k2160p30", bmdMode4K2160p30, "2160p30" },
+		{ "2160p50", bmdMode4K2160p50, "2160p50" },
+		{ "4k2160p50", bmdMode4K2160p50, "2160p50" },
+		{ "2160p5994", bmdMode4K2160p5994, "2160p59.94" },
+		{ "4k2160p5994", bmdMode4K2160p5994, "2160p59.94" },
+		{ "2160p60", bmdMode4K2160p60, "2160p60" },
+		{ "4k2160p60", bmdMode4K2160p60, "2160p60" }
+	};
+
+	for (const ModeOption& option : options)
+	{
+		if (combinedToken == option.token || (frameToken.empty() && formatToken == option.token))
+		{
+			videoMode.displayMode = option.mode;
+			videoMode.displayName = option.displayName;
+			return true;
+		}
+	}
+
+	return false;
+}
+
+bool ResolveConfiguredVideoFormats(
+	const std::string& inputVideoFormat,
+	const std::string& inputFrameRate,
+	const std::string& outputVideoFormat,
+	const std::string& outputFrameRate,
+	VideoFormatSelection& videoModes,
+	std::string& error)
+{
+	if (!ResolveConfiguredVideoFormat(inputVideoFormat, inputFrameRate, videoModes.input))
+	{
+		error = "Unsupported DeckLink inputVideoFormat/inputFrameRate in config/runtime-host.json: " +
+			inputVideoFormat + " / " + inputFrameRate;
+		return false;
+	}
+
+	if (!ResolveConfiguredVideoFormat(outputVideoFormat, outputFrameRate, videoModes.output))
+	{
+		error = "Unsupported DeckLink outputVideoFormat/outputFrameRate in config/runtime-host.json: " +
+			outputVideoFormat + " / " + outputFrameRate;
+		return false;
+	}
+
+	return true;
+}
+
+bool FindDeckLinkDisplayMode(IDeckLinkDisplayModeIterator* iterator, BMDDisplayMode targetMode, IDeckLinkDisplayMode** foundMode)
+{
+	if (!iterator || !foundMode)
+		return false;
+
+	*foundMode = NULL;
+	IDeckLinkDisplayMode* candidate = NULL;
+	while (iterator->Next(&candidate) == S_OK)
+	{
+		if (candidate->GetDisplayMode() == targetMode)
+		{
+			*foundMode = candidate;
+			return true;
+		}
+
+		candidate->Release();
+		candidate = NULL;
+	}
+
+	return false;
+}
--- a/src/video/DeckLinkDisplayMode.h
+++ b/src/video/DeckLinkDisplayMode.h
@@ -0,0 +1,47 @@
+#pragma once
+
+#include "DeckLinkAPI_h.h"
+
+#include <string>
+
+struct FrameSize
+{
+	unsigned width = 0;
+	unsigned height = 0;
+
+	bool IsEmpty() const { return width == 0 || height == 0; }
+};
+
+inline bool operator==(const FrameSize& left, const FrameSize& right)
+{
+	return left.width == right.width && left.height == right.height;
+}
+
+inline bool operator!=(const FrameSize& left, const FrameSize& right)
+{
+	return !(left == right);
+}
+
+struct VideoFormat
+{
+	BMDDisplayMode displayMode = bmdModeHD1080p5994;
+	std::string displayName = "1080p59.94";
+};
+
+struct VideoFormatSelection
+{
+	VideoFormat input;
+	VideoFormat output;
+};
+
+std::string NormalizeModeToken(const std::string& value);
+bool ResolveConfiguredDisplayMode(const std::string& videoFormat, const std::string& frameRate, BMDDisplayMode& displayMode, std::string& displayModeName);
+bool ResolveConfiguredVideoFormat(const std::string& videoFormat, const std::string& frameRate, VideoFormat& videoMode);
+bool ResolveConfiguredVideoFormats(
+	const std::string& inputVideoFormat,
+	const std::string& inputFrameRate,
+	const std::string& outputVideoFormat,
+	const std::string& outputFrameRate,
+	VideoFormatSelection& videoModes,
+	std::string& error);
+bool FindDeckLinkDisplayMode(IDeckLinkDisplayModeIterator* iterator, BMDDisplayMode targetMode, IDeckLinkDisplayMode** foundMode);
--- a/src/video/DeckLinkFrameTransfer.cpp
+++ b/src/video/DeckLinkFrameTransfer.cpp
@@ -0,0 +1,100 @@
+#include "DeckLinkFrameTransfer.h"
+
+#include "DeckLinkSession.h"
+
+////////////////////////////////////////////
+// DeckLink Capture Delegate Class
+////////////////////////////////////////////
+CaptureDelegate::CaptureDelegate(DeckLinkSession* pOwner) :
+	m_pOwner(pOwner),
+	mRefCount(1)
+{
+}
+
+HRESULT CaptureDelegate::QueryInterface(REFIID, LPVOID* ppv)
+{
+	*ppv = NULL;
+	return E_NOINTERFACE;
+}
+
+ULONG CaptureDelegate::AddRef()
+{
+	return InterlockedIncrement(&mRefCount);
+}
+
+ULONG CaptureDelegate::Release()
+{
+	int newCount = InterlockedDecrement(&mRefCount);
+	if (newCount == 0)
+		delete this;
+	return newCount;
+}
+
+HRESULT CaptureDelegate::VideoInputFrameArrived(IDeckLinkVideoInputFrame* inputFrame, IDeckLinkAudioInputPacket*)
+{
+	if (!inputFrame)
+	{
+		// It's possible to receive a NULL inputFrame, but a valid audioPacket. Ignore audio-only frame.
+		return S_OK;
+	}
+
+	bool hasNoInputSource = (inputFrame->GetFlags() & bmdFrameHasNoInputSource) == bmdFrameHasNoInputSource;
+	m_pOwner->HandleVideoInputFrame(inputFrame, hasNoInputSource);
+	return S_OK;
+}
+
+HRESULT CaptureDelegate::VideoInputFormatChanged(BMDVideoInputFormatChangedEvents, IDeckLinkDisplayMode*, BMDDetectedVideoInputFormatFlags)
+{
+	return S_OK;
+}
+
+////////////////////////////////////////////
+// DeckLink Playout Delegate Class
+////////////////////////////////////////////
+PlayoutDelegate::PlayoutDelegate(DeckLinkSession* pOwner) :
+	m_pOwner(pOwner),
+	mRefCount(1)
+{
+}
+
+HRESULT PlayoutDelegate::QueryInterface(REFIID, LPVOID* ppv)
+{
+	*ppv = NULL;
+	return E_NOINTERFACE;
+}
+
+ULONG PlayoutDelegate::AddRef()
+{
+	return InterlockedIncrement(&mRefCount);
+}
+
+ULONG PlayoutDelegate::Release()
+{
+	int newCount = InterlockedDecrement(&mRefCount);
+	if (newCount == 0)
+		delete this;
+	return newCount;
+}
+
+HRESULT PlayoutDelegate::ScheduledFrameCompleted(IDeckLinkVideoFrame* completedFrame, BMDOutputFrameCompletionResult result)
+{
+	switch (result)
+	{
+	case bmdOutputFrameDisplayedLate:
+	case bmdOutputFrameDropped:
+	case bmdOutputFrameCompleted:
+	case bmdOutputFrameFlushed:
+		// Late/drop counts are recorded by VideoBackend; keep this callback lean.
+		break;
+	default:
+		OutputDebugStringA("ScheduledFrameCompleted() frame did not complete: Unknown error\n");
+	}
+
+	m_pOwner->HandlePlayoutFrameCompleted(completedFrame, result);
+	return S_OK;
+}
+
+HRESULT PlayoutDelegate::ScheduledPlaybackHasStopped()
+{
+	return S_OK;
+}
--- a/src/video/DeckLinkFrameTransfer.h
+++ b/src/video/DeckLinkFrameTransfer.h
@@ -0,0 +1,49 @@
+#pragma once
+
+#include <windows.h>
+
+#include <atomic>
+
+#include "DeckLinkAPI_h.h"
+
+class DeckLinkSession;
+
+////////////////////////////////////////////
+// Capture Delegate Class
+////////////////////////////////////////////
+class CaptureDelegate : public IDeckLinkInputCallback
+{
+	DeckLinkSession* m_pOwner;
+	LONG mRefCount;
+
+public:
+	CaptureDelegate(DeckLinkSession* pOwner);
+
+	// IUnknown needs only a dummy implementation
+	virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID* ppv);
+	virtual ULONG STDMETHODCALLTYPE AddRef();
+	virtual ULONG STDMETHODCALLTYPE Release();
+
+	virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(IDeckLinkVideoInputFrame* videoFrame, IDeckLinkAudioInputPacket* audioPacket);
+	virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(BMDVideoInputFormatChangedEvents notificationEvents, IDeckLinkDisplayMode* newDisplayMode, BMDDetectedVideoInputFormatFlags detectedSignalFlags);
+};
+
+////////////////////////////////////////////
+// Render Delegate Class
+////////////////////////////////////////////
+class PlayoutDelegate : public IDeckLinkVideoOutputCallback
+{
+	DeckLinkSession* m_pOwner;
+	LONG mRefCount;
+
+public:
+	PlayoutDelegate(DeckLinkSession* pOwner);
+
+	// IUnknown needs only a dummy implementation
+	virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID* ppv);
+	virtual ULONG STDMETHODCALLTYPE AddRef();
+	virtual ULONG STDMETHODCALLTYPE Release();
+
+	virtual HRESULT STDMETHODCALLTYPE ScheduledFrameCompleted(IDeckLinkVideoFrame* completedFrame, BMDOutputFrameCompletionResult result);
+	virtual HRESULT STDMETHODCALLTYPE ScheduledPlaybackHasStopped();
+};
--- a/src/video/DeckLinkSession.cpp
+++ b/src/video/DeckLinkSession.cpp
@@ -0,0 +1,933 @@
+#include "DeckLinkSession.h"
+
+#include <atlbase.h>
+#include <atomic>
+#include <chrono>
+#include <cstdio>
+#include <cstring>
+#include <new>
+#include <sstream>
+#include <utility>
+#include <vector>
+
+namespace
+{
+constexpr int64_t kMinimumHealthyScheduleLeadFrames = 4;
+constexpr int64_t kProactiveScheduleLeadFloorFrames = 1;
+
+class SystemMemoryDeckLinkVideoBuffer : public IDeckLinkVideoBuffer
+{
+public:
+	SystemMemoryDeckLinkVideoBuffer(void* bytes, unsigned long long sizeBytes) :
+		mBytes(bytes),
+		mSizeBytes(sizeBytes),
+		mRefCount(1)
+	{
+	}
+
+	HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID* ppv) override
+	{
+		if (ppv == nullptr)
+			return E_POINTER;
+		if (iid == IID_IUnknown || iid == IID_IDeckLinkVideoBuffer)
+		{
+			*ppv = static_cast<IDeckLinkVideoBuffer*>(this);
+			AddRef();
+			return S_OK;
+		}
+		*ppv = nullptr;
+		return E_NOINTERFACE;
+	}
+
+	ULONG STDMETHODCALLTYPE AddRef() override
+	{
+		return ++mRefCount;
+	}
+
+	ULONG STDMETHODCALLTYPE Release() override
+	{
+		const ULONG refCount = --mRefCount;
+		if (refCount == 0)
+			delete this;
+		return refCount;
+	}
+
+	HRESULT STDMETHODCALLTYPE GetBytes(void** buffer) override
+	{
+		if (buffer == nullptr)
+			return E_POINTER;
+		*buffer = mBytes;
+		return mBytes != nullptr ? S_OK : E_FAIL;
+	}
+
+	HRESULT STDMETHODCALLTYPE GetSize(unsigned long long* bufferSize) override
+	{
+		if (bufferSize == nullptr)
+			return E_POINTER;
+		*bufferSize = mSizeBytes;
+		return S_OK;
+	}
+
+	HRESULT STDMETHODCALLTYPE StartAccess(BMDBufferAccessFlags) override
+	{
+		return S_OK;
+	}
+
+	HRESULT STDMETHODCALLTYPE EndAccess(BMDBufferAccessFlags) override
+	{
+		return S_OK;
+	}
+
+private:
+	void* mBytes = nullptr;
+	unsigned long long mSizeBytes = 0;
+	std::atomic<ULONG> mRefCount;
+};
+
+std::string BstrToUtf8(BSTR value)
+{
+	if (value == nullptr)
+		return std::string();
+
+	const int requiredBytes = WideCharToMultiByte(CP_UTF8, 0, value, -1, NULL, 0, NULL, NULL);
+	if (requiredBytes <= 1)
+		return std::string();
+
+	std::vector<char> utf8Name(static_cast<std::size_t>(requiredBytes), '\0');
+	if (WideCharToMultiByte(CP_UTF8, 0, value, -1, utf8Name.data(), requiredBytes, NULL, NULL) <= 0)
+		return std::string();
+
+	return std::string(utf8Name.data());
+}
+
+bool InputSupportsFormat(IDeckLinkInput* input, BMDDisplayMode displayMode, BMDPixelFormat pixelFormat)
+{
+	if (input == nullptr)
+		return false;
+
+	BOOL supported = FALSE;
+	BMDDisplayMode actualMode = bmdModeUnknown;
+	const HRESULT result = input->DoesSupportVideoMode(
+		bmdVideoConnectionUnspecified,
+		displayMode,
+		pixelFormat,
+		bmdNoVideoInputConversion,
+		bmdSupportedVideoModeDefault,
+		&actualMode,
+		&supported);
+	return result == S_OK && supported != FALSE;
+}
+
+bool OutputSupportsFormat(IDeckLinkOutput* output, BMDDisplayMode displayMode, BMDPixelFormat pixelFormat)
+{
+	if (output == nullptr)
+		return false;
+
+	BOOL supported = FALSE;
+	BMDDisplayMode actualMode = bmdModeUnknown;
+	const HRESULT result = output->DoesSupportVideoMode(
+		bmdVideoConnectionUnspecified,
+		displayMode,
+		pixelFormat,
+		bmdNoVideoOutputConversion,
+		bmdSupportedVideoModeDefault,
+		&actualMode,
+		&supported);
+	return result == S_OK && supported != FALSE;
+}
+}
+
+DeckLinkSession::~DeckLinkSession()
+{
+	ReleaseResources();
+}
+
+void DeckLinkSession::ReleaseResources()
+{
+	if (input != nullptr)
+		input->SetCallback(nullptr);
+	captureDelegate.Release();
+	input.Release();
+
+	if (output != nullptr)
+		output->SetScheduledFrameCompletionCallback(nullptr);
+
+	if (keyer != nullptr)
+	{
+		keyer->Disable();
+		mState.externalKeyingActive = false;
+	}
+	keyer.Release();
+
+	playoutDelegate.Release();
+	outputVideoFrameQueue.clear();
+	output.Release();
+}
+
+bool DeckLinkSession::DiscoverDevicesAndModes(const VideoFormatSelection& videoModes, std::string& error)
+{
+	CComPtr<IDeckLinkIterator> deckLinkIterator;
+	CComPtr<IDeckLinkDisplayMode> inputMode;
+	CComPtr<IDeckLinkDisplayMode> outputMode;
+
+	mState.inputDisplayModeName = videoModes.input.displayName;
+	mState.outputDisplayModeName = videoModes.output.displayName;
+
+	HRESULT result = CoCreateInstance(CLSID_CDeckLinkIterator, nullptr, CLSCTX_ALL, IID_IDeckLinkIterator, reinterpret_cast<void**>(&deckLinkIterator));
+	if (FAILED(result))
+	{
+		error = "Please install the Blackmagic DeckLink drivers to use the features of this application.";
+		return false;
+	}
+
+	CComPtr<IDeckLink> deckLink;
+	while (deckLinkIterator->Next(&deckLink) == S_OK)
+	{
+		int64_t duplexMode;
+		bool deviceSupportsInternalKeying = false;
+		bool deviceSupportsExternalKeying = false;
+		std::string modelName;
+		CComPtr<IDeckLinkProfileAttributes> deckLinkAttributes;
+
+		if (deckLink->QueryInterface(IID_IDeckLinkProfileAttributes, (void**)&deckLinkAttributes) != S_OK)
+		{
+			printf("Could not obtain the IDeckLinkProfileAttributes interface\n");
+			deckLink.Release();
+			continue;
+		}
+
+		result = deckLinkAttributes->GetInt(BMDDeckLinkDuplex, &duplexMode);
+		BOOL attributeFlag = FALSE;
+		if (deckLinkAttributes->GetFlag(BMDDeckLinkSupportsInternalKeying, &attributeFlag) == S_OK)
+			deviceSupportsInternalKeying = (attributeFlag != FALSE);
+		attributeFlag = FALSE;
+		if (deckLinkAttributes->GetFlag(BMDDeckLinkSupportsExternalKeying, &attributeFlag) == S_OK)
+			deviceSupportsExternalKeying = (attributeFlag != FALSE);
+		CComBSTR modelNameBstr;
+		if (deckLinkAttributes->GetString(BMDDeckLinkModelName, &modelNameBstr) == S_OK)
+			modelName = BstrToUtf8(modelNameBstr);
+
+		if (result != S_OK || duplexMode == bmdDuplexInactive)
+		{
+			deckLink.Release();
+			continue;
+		}
+
+		bool inputUsed = false;
+		if (!input && deckLink->QueryInterface(IID_IDeckLinkInput, (void**)&input) == S_OK)
+			inputUsed = true;
+
+		if (!output && (!inputUsed || (duplexMode == bmdDuplexFull)))
+		{
+			if (deckLink->QueryInterface(IID_IDeckLinkOutput, (void**)&output) != S_OK)
+				output.Release();
+			else
+			{
+				mState.outputModelName = modelName;
+				mState.supportsInternalKeying = deviceSupportsInternalKeying;
+				mState.supportsExternalKeying = deviceSupportsExternalKeying;
+			}
+		}
+
+		deckLink.Release();
+
+		if (output && input)
+			break;
+	}
+
+	if (!output)
+	{
+		error = "Expected an Output DeckLink device";
+		ReleaseResources();
+		return false;
+	}
+
+	CComPtr<IDeckLinkDisplayModeIterator> inputDisplayModeIterator;
+	if (input && input->GetDisplayModeIterator(&inputDisplayModeIterator) != S_OK)
+	{
+		error = "Cannot get input Display Mode Iterator.";
+		ReleaseResources();
+		return false;
+	}
+
+	if (input && !FindDeckLinkDisplayMode(inputDisplayModeIterator, videoModes.input.displayMode, &inputMode))
+	{
+		error = "Cannot get specified input BMDDisplayMode for configured mode: " + videoModes.input.displayName;
+		ReleaseResources();
+		return false;
+	}
+	inputDisplayModeIterator.Release();
+
+	CComPtr<IDeckLinkDisplayModeIterator> outputDisplayModeIterator;
+	if (output->GetDisplayModeIterator(&outputDisplayModeIterator) != S_OK)
+	{
+		error = "Cannot get output Display Mode Iterator.";
+		ReleaseResources();
+		return false;
+	}
+
+	if (!FindDeckLinkDisplayMode(outputDisplayModeIterator, videoModes.output.displayMode, &outputMode))
+	{
+		error = "Cannot get specified output BMDDisplayMode for configured mode: " + videoModes.output.displayName;
+		ReleaseResources();
+		return false;
+	}
+
+	mState.outputFrameSize = { static_cast<unsigned>(outputMode->GetWidth()), static_cast<unsigned>(outputMode->GetHeight()) };
+	mState.inputFrameSize = inputMode
+		? FrameSize{ static_cast<unsigned>(inputMode->GetWidth()), static_cast<unsigned>(inputMode->GetHeight()) }
+		: mState.outputFrameSize;
+	if (!input)
+		mState.inputDisplayModeName = "No input - black frame";
+	BMDTimeValue frameDuration = 0;
+	BMDTimeScale frameTimescale = 0;
+	outputMode->GetFrameRate(&frameDuration, &frameTimescale);
+	mScheduler.Configure(frameDuration, frameTimescale, mPlayoutPolicy);
+	mState.frameBudgetMilliseconds = mScheduler.FrameBudgetMilliseconds();
+
+	mState.inputFrameRowBytes = mState.inputFrameSize.width * 2u;
+	mState.outputFrameRowBytes = mState.outputFrameSize.width * 4u;
+	mState.captureTextureWidth = mState.inputFrameSize.width / 2u;
+	mState.outputPackTextureWidth = mState.outputFrameSize.width;
+	mState.hasInputDevice = input != nullptr;
+	mState.hasInputSource = false;
+
+	return true;
+}
+
+bool DeckLinkSession::SelectPreferredFormats(const VideoFormatSelection& videoModes, bool outputAlphaRequired, std::string& error)
+{
+	if (!output)
+	{
+		error = "Expected an Output DeckLink device";
+		return false;
+	}
+
+	mState.formatStatusMessage.clear();
+
+	const bool inputTenBitSupported = input != nullptr && InputSupportsFormat(input, videoModes.input.displayMode, bmdFormat10BitYUV);
+	mState.inputPixelFormat = input != nullptr ? ChoosePreferredVideoIOFormat(inputTenBitSupported) : VideoIOPixelFormat::Uyvy8;
+	if (input != nullptr && !inputTenBitSupported)
+		mState.formatStatusMessage += "DeckLink input does not report 10-bit YUV support for the configured mode; using 8-bit capture. ";
+
+	const bool outputTenBitSupported = OutputSupportsFormat(output, videoModes.output.displayMode, bmdFormat10BitYUV);
+	const bool outputTenBitYuvaSupported = OutputSupportsFormat(output, videoModes.output.displayMode, bmdFormat10BitYUVA);
+	mState.outputPixelFormat = outputAlphaRequired
+		? (outputTenBitYuvaSupported ? VideoIOPixelFormat::Yuva10 : VideoIOPixelFormat::Bgra8)
+		: (outputTenBitSupported ? VideoIOPixelFormat::V210 : VideoIOPixelFormat::Bgra8);
+	if (outputAlphaRequired && outputTenBitYuvaSupported)
+		mState.formatStatusMessage += "External keying requires alpha; using 10-bit YUVA output. ";
+	else if (outputAlphaRequired)
+		mState.formatStatusMessage += "External keying requires alpha, but DeckLink output does not report 10-bit YUVA support for the configured mode; using 8-bit BGRA output. ";
+	else if (!outputTenBitSupported)
+		mState.formatStatusMessage += "DeckLink output does not report 10-bit YUV support for the configured mode; using 8-bit BGRA output. ";
+
+	int deckLinkOutputRowBytes = 0;
+	if (output->RowBytesForPixelFormat(DeckLinkPixelFormatForVideoIO(mState.outputPixelFormat), mState.outputFrameSize.width, &deckLinkOutputRowBytes) != S_OK)
+	{
+		error = "DeckLink output setup failed while calculating output row bytes.";
+		return false;
+	}
+	mState.outputFrameRowBytes = static_cast<unsigned>(deckLinkOutputRowBytes);
+	mState.outputPackTextureWidth = OutputIsTenBit()
+		? PackedTextureWidthFromRowBytes(mState.outputFrameRowBytes)
+		: mState.outputFrameSize.width;
+
+	if (InputIsTenBit())
+	{
+		int deckLinkInputRowBytes = 0;
+		if (output->RowBytesForPixelFormat(bmdFormat10BitYUV, mState.inputFrameSize.width, &deckLinkInputRowBytes) == S_OK)
+			mState.inputFrameRowBytes = static_cast<unsigned>(deckLinkInputRowBytes);
+		else
+			mState.inputFrameRowBytes = MinimumV210RowBytes(mState.inputFrameSize.width);
+	}
+	else
+	{
+		mState.inputFrameRowBytes = mState.inputFrameSize.width * 2u;
+	}
+	mState.captureTextureWidth = InputIsTenBit()
+		? PackedTextureWidthFromRowBytes(mState.inputFrameRowBytes)
+		: mState.inputFrameSize.width / 2u;
+
+	std::ostringstream status;
+	status << "DeckLink formats: capture " << (input ? VideoIOPixelFormatName(mState.inputPixelFormat) : "none")
+		<< ", output " << VideoIOPixelFormatName(mState.outputPixelFormat) << ".";
+	if (!mState.formatStatusMessage.empty())
+		status << " " << mState.formatStatusMessage;
+	mState.formatStatusMessage = status.str();
+	return true;
+}
+
+bool DeckLinkSession::ConfigureInput(InputFrameCallback callback, const VideoFormat& inputVideoMode, std::string& error)
+{
+	mInputFrameCallback = std::move(callback);
+
+	if (!input)
+	{
+		mState.hasInputSource = false;
+		mState.inputDisplayModeName = "No input - black frame";
+		return true;
+	}
+
+	const BMDPixelFormat deckLinkInputPixelFormat = DeckLinkPixelFormatForVideoIO(mState.inputPixelFormat);
+	if (input->EnableVideoInput(inputVideoMode.displayMode, deckLinkInputPixelFormat, bmdVideoInputFlagDefault) != S_OK)
+	{
+		if (mState.inputPixelFormat == VideoIOPixelFormat::V210)
+		{
+			OutputDebugStringA("DeckLink 10-bit input could not be enabled; falling back to 8-bit capture.\n");
+			mState.inputPixelFormat = VideoIOPixelFormat::Uyvy8;
+			mState.inputFrameRowBytes = mState.inputFrameSize.width * 2u;
+			mState.captureTextureWidth = mState.inputFrameSize.width / 2u;
+			if (input->EnableVideoInput(inputVideoMode.displayMode, bmdFormat8BitYUV, bmdVideoInputFlagDefault) == S_OK)
+			{
+				std::ostringstream status;
+				status << "DeckLink formats: capture " << VideoIOPixelFormatName(mState.inputPixelFormat)
+					<< ", output " << VideoIOPixelFormatName(mState.outputPixelFormat)
+					<< ". DeckLink 10-bit input enable failed; using 8-bit capture.";
+				mState.formatStatusMessage = status.str();
+				goto input_enabled;
+			}
+		}
+
+		OutputDebugStringA("DeckLink input could not be enabled; continuing in output-only black-frame mode.\n");
+		input.Release();
+		mState.hasInputDevice = false;
+		mState.hasInputSource = false;
+		mState.inputDisplayModeName = "No input - black frame";
+		return true;
+	}
+
+input_enabled:
+	captureDelegate.Attach(new (std::nothrow) CaptureDelegate(this));
+	if (captureDelegate == nullptr)
+	{
+		error = "DeckLink input setup failed while creating the capture callback.";
+		return false;
+	}
+	if (input->SetCallback(captureDelegate) != S_OK)
+	{
+		error = "DeckLink input setup failed while installing the capture callback.";
+		return false;
+	}
+
+	return true;
+}
+
+bool DeckLinkSession::ConfigureOutput(OutputFrameCallback callback, const VideoFormat& outputVideoMode, bool externalKeyingEnabled, std::string& error)
+{
+	mOutputFrameCallback = std::move(callback);
+
+	if (output->EnableVideoOutput(outputVideoMode.displayMode, bmdVideoOutputFlagDefault) != S_OK)
+	{
+		error = "DeckLink output setup failed while enabling video output.";
+		return false;
+	}
+
+	if (output->QueryInterface(IID_IDeckLinkKeyer, (void**)&keyer) == S_OK && keyer != NULL)
+		mState.keyerInterfaceAvailable = true;
+
+	if (externalKeyingEnabled)
+	{
+		if (!mState.supportsExternalKeying)
+		{
+			mState.statusMessage = "External keying was requested, but the selected DeckLink output does not report external keying support.";
+		}
+		else if (!mState.keyerInterfaceAvailable)
+		{
+			mState.statusMessage = "External keying was requested, but the selected DeckLink output does not expose the IDeckLinkKeyer interface.";
+		}
+		else if (keyer->Enable(TRUE) != S_OK || keyer->SetLevel(255) != S_OK)
+		{
+			mState.statusMessage = "External keying was requested, but enabling the DeckLink keyer failed.";
+		}
+		else
+		{
+			mState.externalKeyingActive = true;
+			mState.statusMessage = "External keying is active on the selected DeckLink output.";
+		}
+	}
+	else if (mState.supportsExternalKeying)
+	{
+		mState.statusMessage = "Selected DeckLink output supports external keying. Set enableExternalKeying to true in runtime-host.json to request it.";
+	}
+
+	const VideoPlayoutPolicy policy = NormalizeVideoPlayoutPolicy(mPlayoutPolicy);
+	mPlayoutPolicy = policy;
+	for (unsigned i = 0; i < policy.outputFramePoolSize; i++)
+	{
+		CComPtr<IDeckLinkMutableVideoFrame> outputFrame;
+
+		const BMDPixelFormat deckLinkOutputPixelFormat = DeckLinkPixelFormatForVideoIO(mState.outputPixelFormat);
+		if (output->CreateVideoFrame(mState.outputFrameSize.width, mState.outputFrameSize.height, mState.outputFrameRowBytes, deckLinkOutputPixelFormat, bmdFrameFlagFlipVertical, &outputFrame) != S_OK)
+		{
+			error = "DeckLink output setup failed while creating an output video frame.";
+			return false;
+		}
+
+		outputVideoFrameQueue.push_back(outputFrame);
+	}
+
+	playoutDelegate.Attach(new (std::nothrow) PlayoutDelegate(this));
+	if (playoutDelegate == nullptr)
+	{
+		error = "DeckLink output setup failed while creating the playout callback.";
+		return false;
+	}
+
+	if (output->SetScheduledFrameCompletionCallback(playoutDelegate) != S_OK)
+	{
+		error = "DeckLink output setup failed while installing the scheduled-frame callback.";
+		return false;
+	}
+
+	if (!mState.formatStatusMessage.empty())
+		mState.statusMessage = mState.statusMessage.empty() ? mState.formatStatusMessage : mState.formatStatusMessage + " " + mState.statusMessage;
+
+	return true;
+}
+
+double DeckLinkSession::FrameBudgetMilliseconds() const
+{
+	return mScheduler.FrameBudgetMilliseconds();
+}
+
+bool DeckLinkSession::AcquireNextOutputVideoFrame(CComPtr<IDeckLinkMutableVideoFrame>& outputVideoFrame)
+{
+	if (outputVideoFrameQueue.empty())
+		return false;
+
+	outputVideoFrame = outputVideoFrameQueue.front();
+	outputVideoFrameQueue.pop_front();
+	return outputVideoFrame != nullptr;
+}
+
+bool DeckLinkSession::PopulateOutputFrame(IDeckLinkMutableVideoFrame* outputVideoFrame, VideoIOOutputFrame& frame)
+{
+	if (outputVideoFrame == nullptr)
+		return false;
+
+	CComPtr<IDeckLinkVideoBuffer> outputVideoFrameBuffer;
+	if (outputVideoFrame->QueryInterface(IID_IDeckLinkVideoBuffer, (void**)&outputVideoFrameBuffer) != S_OK)
+		return false;
+
+	if (outputVideoFrameBuffer->StartAccess(bmdBufferAccessWrite) != S_OK)
+		return false;
+
+	void* pFrame = nullptr;
+	outputVideoFrameBuffer->GetBytes(&pFrame);
+
+	frame.bytes = pFrame;
+	frame.rowBytes = outputVideoFrame->GetRowBytes();
+	frame.width = mState.outputFrameSize.width;
+	frame.height = mState.outputFrameSize.height;
+	frame.pixelFormat = mState.outputPixelFormat;
+	outputVideoFrame->AddRef();
+	frame.nativeFrame = outputVideoFrame;
+	frame.nativeBuffer = outputVideoFrameBuffer.Detach();
+	return true;
+}
+
+bool DeckLinkSession::ScheduleFrame(IDeckLinkMutableVideoFrame* outputVideoFrame)
+{
+	if (outputVideoFrame == nullptr || output == nullptr)
+	{
+		++mState.deckLinkScheduleFailureCount;
+		return false;
+	}
+
+	if (mScheduleRealignmentPending)
+	{
+		RealignScheduleCursorToPlayback();
+		mScheduleRealignmentPending = false;
+	}
+
+	UpdateScheduleLeadTelemetry();
+	MaybeRealignScheduleCursorForLowLead();
+	const VideoIOScheduleTime scheduleTime = mScheduler.NextScheduleTime();
+	const auto scheduleStart = std::chrono::steady_clock::now();
+	const HRESULT result = output->ScheduleVideoFrame(outputVideoFrame, scheduleTime.streamTime, scheduleTime.duration, scheduleTime.timeScale);
+	const auto scheduleEnd = std::chrono::steady_clock::now();
+	mState.deckLinkScheduleCallMilliseconds = std::chrono::duration_cast<std::chrono::duration<double, std::milli>>(scheduleEnd - scheduleStart).count();
+	if (result != S_OK)
+		++mState.deckLinkScheduleFailureCount;
+	RefreshBufferedVideoFrameCount();
+	return result == S_OK;
+}
+
+void DeckLinkSession::UpdateScheduleLeadTelemetry()
+{
+	if (output == nullptr)
+	{
+		mState.deckLinkScheduleLeadAvailable = false;
+		return;
+	}
+
+	BMDTimeValue streamTime = 0;
+	double playbackSpeed = 0.0;
+	if (output->GetScheduledStreamTime(mScheduler.TimeScale(), &streamTime, &playbackSpeed) != S_OK || playbackSpeed <= 0.0)
+	{
+		mState.deckLinkScheduleLeadAvailable = false;
+		return;
+	}
+
+	const uint64_t playbackFrameIndex = streamTime >= 0 && mScheduler.FrameDuration() > 0
+		? static_cast<uint64_t>(streamTime / mScheduler.FrameDuration())
+		: 0;
+	const uint64_t nextScheduleFrameIndex = mScheduler.ScheduledFrameIndex();
+	mState.deckLinkScheduleLeadAvailable = true;
+	mState.deckLinkPlaybackStreamTime = streamTime;
+	mState.deckLinkPlaybackFrameIndex = playbackFrameIndex;
+	mState.deckLinkNextScheduleFrameIndex = nextScheduleFrameIndex;
+	mState.deckLinkScheduleLeadFrames = static_cast<int64_t>(nextScheduleFrameIndex) - static_cast<int64_t>(playbackFrameIndex);
+}
+
+void DeckLinkSession::MaybeRealignScheduleCursorForLowLead()
+{
+	if (!mState.deckLinkScheduleLeadAvailable)
+		return;
+
+	if (mState.deckLinkScheduleLeadFrames >= kMinimumHealthyScheduleLeadFrames)
+	{
+		mProactiveScheduleRealignmentArmed = true;
+		return;
+	}
+
+	if (!mProactiveScheduleRealignmentArmed || mState.deckLinkScheduleLeadFrames > kProactiveScheduleLeadFloorFrames)
+		return;
+
+	RealignScheduleCursorToPlayback();
+	mProactiveScheduleRealignmentArmed = false;
+}
+
+void DeckLinkSession::RealignScheduleCursorToPlayback()
+{
+	if (output == nullptr)
+		return;
+
+	BMDTimeValue streamTime = 0;
+	double playbackSpeed = 0.0;
+	if (output->GetScheduledStreamTime(mScheduler.TimeScale(), &streamTime, &playbackSpeed) != S_OK || playbackSpeed <= 0.0)
+		return;
+
+	const VideoPlayoutPolicy policy = NormalizeVideoPlayoutPolicy(mPlayoutPolicy);
+	mScheduler.AlignNextScheduleTimeToPlayback(streamTime, policy.targetPrerollFrames);
+	++mState.deckLinkScheduleRealignmentCount;
+	UpdateScheduleLeadTelemetry();
+}
+
+bool DeckLinkSession::ScheduleSystemMemoryFrame(const VideoIOOutputFrame& frame)
+{
+	if (output == nullptr || frame.bytes == nullptr || frame.rowBytes <= 0 || frame.height == 0)
+		return false;
+
+	CComPtr<IDeckLinkVideoBuffer> videoBuffer;
+	videoBuffer.Attach(new (std::nothrow) SystemMemoryDeckLinkVideoBuffer(
+		frame.bytes,
+		static_cast<unsigned long long>(frame.rowBytes) * static_cast<unsigned long long>(frame.height)));
+	if (videoBuffer == nullptr)
+		return false;
+
+	CComPtr<IDeckLinkMutableVideoFrame> outputVideoFrame;
+	const BMDPixelFormat pixelFormat = DeckLinkPixelFormatForVideoIO(frame.pixelFormat);
+	if (output->CreateVideoFrameWithBuffer(
+		frame.width,
+		frame.height,
+		frame.rowBytes,
+		pixelFormat,
+		bmdFrameFlagFlipVertical,
+		videoBuffer,
+		&outputVideoFrame) != S_OK)
+	{
+		return false;
+	}
+
+	IDeckLinkVideoFrame* scheduledFrame = outputVideoFrame;
+	{
+		std::lock_guard<std::mutex> lock(mScheduledSystemFrameMutex);
+		mScheduledSystemFrameBuffers[scheduledFrame] = frame.bytes;
+	}
+
+	if (ScheduleFrame(outputVideoFrame))
+		return true;
+
+	{
+		std::lock_guard<std::mutex> lock(mScheduledSystemFrameMutex);
+		mScheduledSystemFrameBuffers.erase(scheduledFrame);
+	}
+	return false;
+}
+
+bool DeckLinkSession::ScheduleBlackFrame(IDeckLinkMutableVideoFrame* outputVideoFrame)
+{
+	if (outputVideoFrame == nullptr)
+		return false;
+
+	CComPtr<IDeckLinkVideoBuffer> outputVideoFrameBuffer;
+	if (outputVideoFrame->QueryInterface(IID_IDeckLinkVideoBuffer, (void**)&outputVideoFrameBuffer) != S_OK)
+		return false;
+
+	if (outputVideoFrameBuffer->StartAccess(bmdBufferAccessWrite) != S_OK)
+		return false;
+
+	void* pFrame = nullptr;
+	outputVideoFrameBuffer->GetBytes((void**)&pFrame);
+	memset(pFrame, 0, outputVideoFrame->GetRowBytes() * mState.outputFrameSize.height);
+
+	outputVideoFrameBuffer->EndAccess(bmdBufferAccessWrite);
+	return ScheduleFrame(outputVideoFrame);
+}
+
+void DeckLinkSession::RefreshBufferedVideoFrameCount()
+{
+	if (output == nullptr)
+	{
+		mState.actualDeckLinkBufferedFramesAvailable = false;
+		return;
+	}
+
+	unsigned int bufferedFrameCount = 0;
+	if (output->GetBufferedVideoFrameCount(&bufferedFrameCount) == S_OK)
+	{
+		mState.actualDeckLinkBufferedFrames = bufferedFrameCount;
+		mState.actualDeckLinkBufferedFramesAvailable = true;
+	}
+	else
+	{
+		mState.actualDeckLinkBufferedFramesAvailable = false;
+	}
+}
+
+bool DeckLinkSession::BeginOutputFrame(VideoIOOutputFrame& frame)
+{
+	CComPtr<IDeckLinkMutableVideoFrame> outputVideoFrame;
+	return AcquireNextOutputVideoFrame(outputVideoFrame) && PopulateOutputFrame(outputVideoFrame, frame);
+}
+
+void DeckLinkSession::EndOutputFrame(VideoIOOutputFrame& frame)
+{
+	IDeckLinkVideoBuffer* outputVideoFrameBuffer = static_cast<IDeckLinkVideoBuffer*>(frame.nativeBuffer);
+	if (outputVideoFrameBuffer != nullptr)
+	{
+		outputVideoFrameBuffer->EndAccess(bmdBufferAccessWrite);
+		outputVideoFrameBuffer->Release();
+	}
+	frame.nativeBuffer = nullptr;
+	frame.bytes = nullptr;
+}
+
+VideoPlayoutRecoveryDecision DeckLinkSession::AccountForCompletionResult(VideoIOCompletionResult completionResult, uint64_t readyQueueDepth)
+{
+	return mScheduler.AccountForCompletionResult(completionResult, readyQueueDepth);
+}
+
+bool DeckLinkSession::ScheduleOutputFrame(const VideoIOOutputFrame& frame)
+{
+	if (frame.nativeFrame == nullptr)
+		return ScheduleSystemMemoryFrame(frame);
+
+	IDeckLinkMutableVideoFrame* outputVideoFrame = static_cast<IDeckLinkMutableVideoFrame*>(frame.nativeFrame);
+	const bool scheduled = ScheduleFrame(outputVideoFrame);
+	if (outputVideoFrame != nullptr)
+		outputVideoFrame->Release();
+	return scheduled;
+}
+
+bool DeckLinkSession::PrepareOutputSchedule()
+{
+	mScheduler.Reset();
+	RefreshBufferedVideoFrameCount();
+	return output != nullptr;
+}
+
+bool DeckLinkSession::StartInputStreams()
+{
+	if (!input)
+		return true;
+
+	if (input->StartStreams() != S_OK)
+	{
+		MessageBoxA(NULL, "Could not start the DeckLink input stream.", "DeckLink start failed", MB_OK | MB_ICONERROR);
+		return false;
+	}
+	return true;
+}
+
+bool DeckLinkSession::StartScheduledPlayback()
+{
+	if (!output)
+	{
+		MessageBoxA(NULL, "Cannot start playout because no DeckLink output device is available.", "DeckLink start failed", MB_OK | MB_ICONERROR);
+		return false;
+	}
+
+	if (output->StartScheduledPlayback(0, mScheduler.TimeScale(), 1.0) != S_OK)
+	{
+		MessageBoxA(NULL, "Could not start DeckLink scheduled playback.", "DeckLink start failed", MB_OK | MB_ICONERROR);
+		return false;
+	}
+	RefreshBufferedVideoFrameCount();
+	return true;
+}
+
+bool DeckLinkSession::Start()
+{
+	if (!output)
+	{
+		MessageBoxA(NULL, "Cannot start playout because no DeckLink output device is available.", "DeckLink start failed", MB_OK | MB_ICONERROR);
+		return false;
+	}
+	if (outputVideoFrameQueue.empty())
+	{
+		MessageBoxA(NULL, "Cannot start playout because the output frame queue is empty.", "DeckLink start failed", MB_OK | MB_ICONERROR);
+		return false;
+	}
+
+	const VideoPlayoutPolicy policy = NormalizeVideoPlayoutPolicy(mPlayoutPolicy);
+	mPlayoutPolicy = policy;
+	if (!PrepareOutputSchedule())
+		return false;
+
+	for (unsigned i = 0; i < policy.targetPrerollFrames; i++)
+	{
+		CComPtr<IDeckLinkMutableVideoFrame> outputVideoFrame;
+		if (!AcquireNextOutputVideoFrame(outputVideoFrame))
+		{
+			MessageBoxA(NULL, "Could not acquire a preroll output frame.", "DeckLink start failed", MB_OK | MB_ICONERROR);
+			return false;
+		}
+		if (!ScheduleBlackFrame(outputVideoFrame))
+		{
+			MessageBoxA(NULL, "Could not schedule a preroll output frame.", "DeckLink start failed", MB_OK | MB_ICONERROR);
+			return false;
+		}
+	}
+
+	return StartInputStreams() && StartScheduledPlayback();
+}
+
+bool DeckLinkSession::Stop()
+{
+	if (keyer != nullptr)
+	{
+		keyer->Disable();
+		mState.externalKeyingActive = false;
+	}
+
+	if (input)
+	{
+		input->StopStreams();
+		input->DisableVideoInput();
+	}
+
+	if (output)
+	{
+		output->StopScheduledPlayback(0, NULL, 0);
+		output->DisableVideoOutput();
+	}
+
+	return true;
+}
+
+void DeckLinkSession::HandleVideoInputFrame(IDeckLinkVideoInputFrame* inputFrame, bool hasNoInputSource)
+{
+	mState.hasInputSource = !hasNoInputSource;
+	if (hasNoInputSource || mInputFrameCallback == nullptr)
+	{
+		VideoIOFrame frame;
+		frame.width = mState.inputFrameSize.width;
+		frame.height = mState.inputFrameSize.height;
+		frame.pixelFormat = mState.inputPixelFormat;
+		frame.hasNoInputSource = hasNoInputSource;
+		if (mInputFrameCallback)
+			mInputFrameCallback(frame);
+		return;
+	}
+
+	CComPtr<IDeckLinkVideoBuffer> inputFrameBuffer;
+	void* videoPixels = nullptr;
+	if (inputFrame->QueryInterface(IID_IDeckLinkVideoBuffer, (void**)&inputFrameBuffer) != S_OK)
+		return;
+	if (inputFrameBuffer->StartAccess(bmdBufferAccessRead) != S_OK)
+		return;
+
+	inputFrameBuffer->GetBytes(&videoPixels);
+
+	VideoIOFrame frame;
+	frame.bytes = videoPixels;
+	frame.rowBytes = inputFrame->GetRowBytes();
+	frame.width = static_cast<unsigned>(inputFrame->GetWidth());
+	frame.height = static_cast<unsigned>(inputFrame->GetHeight());
+	frame.pixelFormat = mState.inputPixelFormat;
+	frame.hasNoInputSource = hasNoInputSource;
+	mInputFrameCallback(frame);
+
+	inputFrameBuffer->EndAccess(bmdBufferAccessRead);
+}
+
+void DeckLinkSession::HandlePlayoutFrameCompleted(IDeckLinkVideoFrame* completedFrame, BMDOutputFrameCompletionResult completionResult)
+{
+	RefreshBufferedVideoFrameCount();
+
+	void* completedSystemBuffer = nullptr;
+	if (completedFrame != nullptr)
+	{
+		bool externalSystemFrame = false;
+		{
+			std::lock_guard<std::mutex> lock(mScheduledSystemFrameMutex);
+			auto externalFrame = mScheduledSystemFrameBuffers.find(completedFrame);
+			if (externalFrame != mScheduledSystemFrameBuffers.end())
+			{
+				completedSystemBuffer = externalFrame->second;
+				mScheduledSystemFrameBuffers.erase(externalFrame);
+				externalSystemFrame = true;
+			}
+		}
+
+		if (!externalSystemFrame)
+		{
+			CComPtr<IDeckLinkMutableVideoFrame> reusableFrame;
+			if (completedFrame->QueryInterface(IID_IDeckLinkMutableVideoFrame, reinterpret_cast<void**>(&reusableFrame)) == S_OK &&
+				reusableFrame != nullptr)
+			{
+				outputVideoFrameQueue.push_back(reusableFrame);
+			}
+		}
+	}
+
+	if (!mOutputFrameCallback)
+		return;
+
+	VideoIOCompletion completion;
+	completion.result = TranslateCompletionResult(completionResult);
+	if (completion.result == VideoIOCompletionResult::DisplayedLate || completion.result == VideoIOCompletionResult::Dropped)
+	{
+		if (mScheduleRealignmentArmed)
+		{
+			mScheduleRealignmentPending = true;
+			mScheduleRealignmentArmed = false;
+		}
+	}
+	else if (completion.result == VideoIOCompletionResult::Completed)
+	{
+		mScheduleRealignmentArmed = true;
+	}
+	completion.outputFrameBuffer = completedSystemBuffer;
+	mOutputFrameCallback(completion);
+}
+
+VideoIOCompletionResult DeckLinkSession::TranslateCompletionResult(BMDOutputFrameCompletionResult completionResult)
+{
+	switch (completionResult)
+	{
+	case bmdOutputFrameDisplayedLate:
+		return VideoIOCompletionResult::DisplayedLate;
+	case bmdOutputFrameDropped:
+		return VideoIOCompletionResult::Dropped;
+	case bmdOutputFrameFlushed:
+		return VideoIOCompletionResult::Flushed;
+	case bmdOutputFrameCompleted:
+		return VideoIOCompletionResult::Completed;
+	default:
+		return VideoIOCompletionResult::Unknown;
+	}
+}
--- a/src/video/DeckLinkSession.h
+++ b/src/video/DeckLinkSession.h
@@ -0,0 +1,102 @@
+#pragma once
+
+#include "DeckLinkAPI_h.h"
+#include "DeckLinkDisplayMode.h"
+#include "DeckLinkFrameTransfer.h"
+#include "DeckLinkVideoIOFormat.h"
+#include "VideoIOFormat.h"
+#include "VideoIOTypes.h"
+#include "VideoPlayoutPolicy.h"
+#include "VideoPlayoutScheduler.h"
+
+#include <atlbase.h>
+#include <deque>
+#include <mutex>
+#include <string>
+#include <unordered_map>
+
+class OpenGLComposite;
+
+class DeckLinkSession : public VideoIODevice
+{
+public:
+	DeckLinkSession() = default;
+	~DeckLinkSession();
+
+	void ReleaseResources() override;
+	bool DiscoverDevicesAndModes(const VideoFormatSelection& videoModes, std::string& error) override;
+	bool SelectPreferredFormats(const VideoFormatSelection& videoModes, bool outputAlphaRequired, std::string& error) override;
+	bool ConfigureInput(InputFrameCallback callback, const VideoFormat& inputVideoMode, std::string& error) override;
+	bool ConfigureOutput(OutputFrameCallback callback, const VideoFormat& outputVideoMode, bool externalKeyingEnabled, std::string& error) override;
+	bool PrepareOutputSchedule() override;
+	bool StartInputStreams() override;
+	bool StartScheduledPlayback() override;
+	bool Start() override;
+	bool Stop() override;
+
+	bool HasInputDevice() const { return mState.hasInputDevice; }
+	bool HasInputSource() const { return mState.hasInputSource; }
+	void SetInputSourceMissing(bool missing) { mState.hasInputSource = !missing; }
+	bool InputOutputDimensionsDiffer() const { return mState.inputFrameSize != mState.outputFrameSize; }
+	const FrameSize& InputFrameSize() const { return mState.inputFrameSize; }
+	const FrameSize& OutputFrameSize() const { return mState.outputFrameSize; }
+	unsigned InputFrameWidth() const { return mState.inputFrameSize.width; }
+	unsigned InputFrameHeight() const { return mState.inputFrameSize.height; }
+	unsigned OutputFrameWidth() const { return mState.outputFrameSize.width; }
+	unsigned OutputFrameHeight() const { return mState.outputFrameSize.height; }
+	VideoIOPixelFormat InputPixelFormat() const { return mState.inputPixelFormat; }
+	VideoIOPixelFormat OutputPixelFormat() const { return mState.outputPixelFormat; }
+	bool InputIsTenBit() const { return VideoIOPixelFormatIsTenBit(mState.inputPixelFormat); }
+	bool OutputIsTenBit() const { return VideoIOPixelFormatIsTenBit(mState.outputPixelFormat); }
+	unsigned InputFrameRowBytes() const { return mState.inputFrameRowBytes; }
+	unsigned OutputFrameRowBytes() const { return mState.outputFrameRowBytes; }
+	unsigned CaptureTextureWidth() const { return mState.captureTextureWidth; }
+	unsigned OutputPackTextureWidth() const { return mState.outputPackTextureWidth; }
+	const std::string& FormatStatusMessage() const { return mState.formatStatusMessage; }
+	const std::string& InputDisplayModeName() const { return mState.inputDisplayModeName; }
+	const std::string& OutputModelName() const { return mState.outputModelName; }
+	bool SupportsInternalKeying() const { return mState.supportsInternalKeying; }
+	bool SupportsExternalKeying() const { return mState.supportsExternalKeying; }
+	bool KeyerInterfaceAvailable() const { return mState.keyerInterfaceAvailable; }
+	bool ExternalKeyingActive() const { return mState.externalKeyingActive; }
+	const std::string& StatusMessage() const { return mState.statusMessage; }
+	void SetStatusMessage(const std::string& message) { mState.statusMessage = message; }
+	const VideoIOState& State() const override { return mState; }
+	VideoIOState& MutableState() override { return mState; }
+	double FrameBudgetMilliseconds() const;
+	VideoPlayoutRecoveryDecision AccountForCompletionResult(VideoIOCompletionResult completionResult, uint64_t readyQueueDepth) override;
+	bool BeginOutputFrame(VideoIOOutputFrame& frame) override;
+	void EndOutputFrame(VideoIOOutputFrame& frame) override;
+	bool ScheduleOutputFrame(const VideoIOOutputFrame& frame) override;
+	void HandleVideoInputFrame(IDeckLinkVideoInputFrame* inputFrame, bool hasNoInputSource);
+	void HandlePlayoutFrameCompleted(IDeckLinkVideoFrame* completedFrame, BMDOutputFrameCompletionResult completionResult);
+
+private:
+	bool AcquireNextOutputVideoFrame(CComPtr<IDeckLinkMutableVideoFrame>& outputVideoFrame);
+	bool PopulateOutputFrame(IDeckLinkMutableVideoFrame* outputVideoFrame, VideoIOOutputFrame& frame);
+	bool ScheduleFrame(IDeckLinkMutableVideoFrame* outputVideoFrame);
+	void UpdateScheduleLeadTelemetry();
+	void MaybeRealignScheduleCursorForLowLead();
+	void RealignScheduleCursorToPlayback();
+	bool ScheduleSystemMemoryFrame(const VideoIOOutputFrame& frame);
+	bool ScheduleBlackFrame(IDeckLinkMutableVideoFrame* outputVideoFrame);
+	void RefreshBufferedVideoFrameCount();
+	static VideoIOCompletionResult TranslateCompletionResult(BMDOutputFrameCompletionResult completionResult);
+
+	CComPtr<CaptureDelegate>				captureDelegate;
+	CComPtr<PlayoutDelegate>				playoutDelegate;
+	CComPtr<IDeckLinkInput>					input;
+	CComPtr<IDeckLinkOutput>				output;
+	CComPtr<IDeckLinkKeyer>					keyer;
+	std::deque<CComPtr<IDeckLinkMutableVideoFrame>> outputVideoFrameQueue;
+	std::mutex								mScheduledSystemFrameMutex;
+	std::unordered_map<IDeckLinkVideoFrame*, void*> mScheduledSystemFrameBuffers;
+	VideoIOState							mState;
+	VideoPlayoutPolicy						mPlayoutPolicy;
+	VideoPlayoutScheduler					mScheduler;
+	bool									mScheduleRealignmentPending = false;
+	bool									mScheduleRealignmentArmed = true;
+	bool									mProactiveScheduleRealignmentArmed = true;
+	InputFrameCallback						mInputFrameCallback;
+	OutputFrameCallback						mOutputFrameCallback;
+};
--- a/src/video/DeckLinkVideoIOFormat.cpp
+++ b/src/video/DeckLinkVideoIOFormat.cpp
@@ -0,0 +1,28 @@
+#include "DeckLinkVideoIOFormat.h"
+
+BMDPixelFormat DeckLinkPixelFormatForVideoIO(VideoIOPixelFormat format)
+{
+	switch (format)
+	{
+	case VideoIOPixelFormat::V210:
+		return bmdFormat10BitYUV;
+	case VideoIOPixelFormat::Yuva10:
+		return bmdFormat10BitYUVA;
+	case VideoIOPixelFormat::Bgra8:
+		return bmdFormat8BitBGRA;
+	case VideoIOPixelFormat::Uyvy8:
+	default:
+		return bmdFormat8BitYUV;
+	}
+}
+
+VideoIOPixelFormat VideoIOPixelFormatFromDeckLink(BMDPixelFormat format)
+{
+	if (format == bmdFormat10BitYUV)
+		return VideoIOPixelFormat::V210;
+	if (format == bmdFormat10BitYUVA)
+		return VideoIOPixelFormat::Yuva10;
+	if (format == bmdFormat8BitBGRA)
+		return VideoIOPixelFormat::Bgra8;
+	return VideoIOPixelFormat::Uyvy8;
+}
--- a/src/video/DeckLinkVideoIOFormat.h
+++ b/src/video/DeckLinkVideoIOFormat.h
@@ -0,0 +1,7 @@
+#pragma once
+
+#include "DeckLinkAPI_h.h"
+#include "VideoIOFormat.h"
+
+BMDPixelFormat DeckLinkPixelFormatForVideoIO(VideoIOPixelFormat format);
+VideoIOPixelFormat VideoIOPixelFormatFromDeckLink(BMDPixelFormat format);
--- a/src/video/OutputProductionController.cpp
+++ b/src/video/OutputProductionController.cpp
@@ -0,0 +1,89 @@
+#include "OutputProductionController.h"
+
+#include <algorithm>
+
+namespace
+{
+std::size_t ClampReadyLimit(unsigned value, std::size_t capacity)
+{
+	const std::size_t requested = static_cast<std::size_t>(value);
+	if (capacity == 0)
+		return requested;
+	return (std::min)(requested, capacity);
+}
+}
+
+OutputProductionController::OutputProductionController(const VideoPlayoutPolicy& policy) :
+	mPolicy(NormalizeVideoPlayoutPolicy(policy))
+{
+}
+
+void OutputProductionController::Configure(const VideoPlayoutPolicy& policy)
+{
+	mPolicy = NormalizeVideoPlayoutPolicy(policy);
+}
+
+OutputProductionDecision OutputProductionController::Decide(const OutputProductionPressure& pressure) const
+{
+	OutputProductionDecision decision;
+
+	const std::size_t configuredMaxReadyFrames = static_cast<std::size_t>(mPolicy.maxReadyFrames);
+	const std::size_t effectiveMaxReadyFrames = pressure.readyQueueCapacity > 0
+		? (std::min)(configuredMaxReadyFrames, pressure.readyQueueCapacity)
+		: configuredMaxReadyFrames;
+	const std::size_t effectiveTargetReadyFrames = (std::min)(
+		ClampReadyLimit(mPolicy.targetReadyFrames, pressure.readyQueueCapacity),
+		effectiveMaxReadyFrames);
+
+	decision.targetReadyFrames = effectiveTargetReadyFrames;
+	decision.maxReadyFrames = effectiveMaxReadyFrames;
+
+	if (effectiveMaxReadyFrames == 0)
+	{
+		decision.action = OutputProductionAction::Throttle;
+		decision.reason = "no-ready-frame-capacity";
+		return decision;
+	}
+
+	if (pressure.readyQueueDepth >= effectiveMaxReadyFrames)
+	{
+		decision.action = OutputProductionAction::Throttle;
+		decision.reason = "ready-queue-full";
+		return decision;
+	}
+
+	if (pressure.readyQueueDepth < effectiveTargetReadyFrames)
+	{
+		decision.action = OutputProductionAction::Produce;
+		decision.requestedFrames = effectiveTargetReadyFrames - pressure.readyQueueDepth;
+		decision.reason = "ready-queue-below-target";
+		return decision;
+	}
+
+	if ((pressure.lateStreak > 0 || pressure.dropStreak > 0 || pressure.readyQueueUnderrunCount > 0) &&
+		pressure.readyQueueDepth < effectiveMaxReadyFrames)
+	{
+		decision.action = OutputProductionAction::Produce;
+		decision.requestedFrames = 1;
+		decision.reason = "playout-pressure";
+		return decision;
+	}
+
+	decision.action = OutputProductionAction::Wait;
+	decision.reason = "ready-queue-at-target";
+	return decision;
+}
+
+const char* OutputProductionActionName(OutputProductionAction action)
+{
+	switch (action)
+	{
+	case OutputProductionAction::Produce:
+		return "Produce";
+	case OutputProductionAction::Throttle:
+		return "Throttle";
+	case OutputProductionAction::Wait:
+	default:
+		return "Wait";
+	}
+}
--- a/src/video/OutputProductionController.h
+++ b/src/video/OutputProductionController.h
@@ -0,0 +1,46 @@
+#pragma once
+
+#include "VideoPlayoutPolicy.h"
+
+#include <cstddef>
+#include <cstdint>
+#include <string>
+
+enum class OutputProductionAction
+{
+	Produce,
+	Wait,
+	Throttle
+};
+
+struct OutputProductionPressure
+{
+	std::size_t readyQueueDepth = 0;
+	std::size_t readyQueueCapacity = 0;
+	uint64_t readyQueueUnderrunCount = 0;
+	uint64_t lateStreak = 0;
+	uint64_t dropStreak = 0;
+};
+
+struct OutputProductionDecision
+{
+	OutputProductionAction action = OutputProductionAction::Wait;
+	std::size_t requestedFrames = 0;
+	std::size_t targetReadyFrames = 0;
+	std::size_t maxReadyFrames = 0;
+	std::string reason;
+};
+
+class OutputProductionController
+{
+public:
+	explicit OutputProductionController(const VideoPlayoutPolicy& policy = VideoPlayoutPolicy());
+
+	void Configure(const VideoPlayoutPolicy& policy);
+	OutputProductionDecision Decide(const OutputProductionPressure& pressure) const;
+
+private:
+	VideoPlayoutPolicy mPolicy;
+};
+
+const char* OutputProductionActionName(OutputProductionAction action);
--- a/src/video/RenderCadenceController.cpp
+++ b/src/video/RenderCadenceController.cpp
@@ -0,0 +1,102 @@
+#include "RenderCadenceController.h"
+
+#include <algorithm>
+#include <cmath>
+
+void RenderCadenceController::Configure(Duration targetFrameDuration, TimePoint firstRenderTime, const RenderCadencePolicy& policy)
+{
+	mTargetFrameDuration = IsPositive(targetFrameDuration) ? targetFrameDuration : std::chrono::milliseconds(1);
+	mPolicy = policy;
+	if (mPolicy.skipThresholdFrames < 1.0)
+		mPolicy.skipThresholdFrames = 1.0;
+	Reset(firstRenderTime);
+}
+
+void RenderCadenceController::Reset(TimePoint firstRenderTime)
+{
+	mNextRenderTime = firstRenderTime;
+	mNextFrameIndex = 0;
+	mMetrics = RenderCadenceMetrics();
+}
+
+RenderCadenceDecision RenderCadenceController::Tick(TimePoint now)
+{
+	RenderCadenceDecision decision;
+	decision.frameIndex = mNextFrameIndex;
+	decision.renderTargetTime = mNextRenderTime;
+	decision.nextRenderTime = mNextRenderTime;
+
+	if (now < mNextRenderTime)
+	{
+		decision.action = RenderCadenceAction::Wait;
+		decision.waitDuration = mNextRenderTime - now;
+		decision.reason = "waiting-for-next-render-tick";
+		return decision;
+	}
+
+	const Duration lateness = now - mNextRenderTime;
+	const uint64_t skippedTicks = SkippedTicksForLateness(lateness);
+	if (skippedTicks > 0)
+	{
+		decision.skippedTicks = skippedTicks;
+		decision.frameIndex = mNextFrameIndex + skippedTicks;
+		decision.renderTargetTime = mNextRenderTime + (mTargetFrameDuration * skippedTicks);
+		decision.reason = "late-skip-render-ticks";
+		mMetrics.skippedTickCount += skippedTicks;
+	}
+	else
+	{
+		decision.reason = IsPositive(lateness) ? "late-render-now" : "on-time-render";
+	}
+
+	decision.action = RenderCadenceAction::Render;
+	decision.lateness = now > decision.renderTargetTime
+		? now - decision.renderTargetTime
+		: Duration::zero();
+	mNextFrameIndex = decision.frameIndex + 1;
+	mNextRenderTime = decision.renderTargetTime + mTargetFrameDuration;
+	decision.nextRenderTime = mNextRenderTime;
+
+	++mMetrics.renderedFrameCount;
+	mMetrics.nextFrameIndex = mNextFrameIndex;
+	mMetrics.lastLateness = decision.lateness;
+	if (IsPositive(decision.lateness))
+	{
+		++mMetrics.lateFrameCount;
+		mMetrics.maxLateness = (std::max)(mMetrics.maxLateness, decision.lateness);
+	}
+
+	return decision;
+}
+
+uint64_t RenderCadenceController::SkippedTicksForLateness(Duration lateness) const
+{
+	if (!mPolicy.skipLateTicks || !IsPositive(lateness) || !IsPositive(mTargetFrameDuration))
+		return 0;
+
+	const double lateFrames = static_cast<double>(lateness.count()) / static_cast<double>(mTargetFrameDuration.count());
+	if (lateFrames < mPolicy.skipThresholdFrames)
+		return 0;
+
+	const uint64_t elapsedTicks = static_cast<uint64_t>(std::floor(lateFrames));
+	if (elapsedTicks == 0)
+		return 0;
+	return (std::min)(elapsedTicks, mPolicy.maxSkippedTicksPerDecision);
+}
+
+bool RenderCadenceController::IsPositive(Duration duration)
+{
+	return duration > Duration::zero();
+}
+
+const char* RenderCadenceActionName(RenderCadenceAction action)
+{
+	switch (action)
+	{
+	case RenderCadenceAction::Render:
+		return "Render";
+	case RenderCadenceAction::Wait:
+	default:
+		return "Wait";
+	}
+}
--- a/src/video/RenderCadenceController.h
+++ b/src/video/RenderCadenceController.h
@@ -0,0 +1,68 @@
+#pragma once
+
+#include <chrono>
+#include <cstdint>
+
+enum class RenderCadenceAction
+{
+	Wait,
+	Render
+};
+
+struct RenderCadencePolicy
+{
+	bool skipLateTicks = true;
+	uint64_t maxSkippedTicksPerDecision = 4;
+	double skipThresholdFrames = 2.0;
+};
+
+struct RenderCadenceDecision
+{
+	RenderCadenceAction action = RenderCadenceAction::Wait;
+	uint64_t frameIndex = 0;
+	uint64_t skippedTicks = 0;
+	std::chrono::steady_clock::time_point renderTargetTime;
+	std::chrono::steady_clock::time_point nextRenderTime;
+	std::chrono::steady_clock::duration waitDuration = std::chrono::steady_clock::duration::zero();
+	std::chrono::steady_clock::duration lateness = std::chrono::steady_clock::duration::zero();
+	const char* reason = "waiting-for-next-render-tick";
+};
+
+struct RenderCadenceMetrics
+{
+	uint64_t nextFrameIndex = 0;
+	uint64_t renderedFrameCount = 0;
+	uint64_t skippedTickCount = 0;
+	uint64_t lateFrameCount = 0;
+	std::chrono::steady_clock::duration lastLateness = std::chrono::steady_clock::duration::zero();
+	std::chrono::steady_clock::duration maxLateness = std::chrono::steady_clock::duration::zero();
+};
+
+class RenderCadenceController
+{
+public:
+	using Clock = std::chrono::steady_clock;
+	using TimePoint = Clock::time_point;
+	using Duration = Clock::duration;
+
+	void Configure(Duration targetFrameDuration, TimePoint firstRenderTime, const RenderCadencePolicy& policy = RenderCadencePolicy());
+	void Reset(TimePoint firstRenderTime);
+	RenderCadenceDecision Tick(TimePoint now);
+
+	Duration TargetFrameDuration() const { return mTargetFrameDuration; }
+	TimePoint NextRenderTime() const { return mNextRenderTime; }
+	uint64_t NextFrameIndex() const { return mNextFrameIndex; }
+	const RenderCadenceMetrics& Metrics() const { return mMetrics; }
+
+private:
+	uint64_t SkippedTicksForLateness(Duration lateness) const;
+	static bool IsPositive(Duration duration);
+
+	Duration mTargetFrameDuration = std::chrono::milliseconds(16);
+	TimePoint mNextRenderTime;
+	uint64_t mNextFrameIndex = 0;
+	RenderCadencePolicy mPolicy;
+	RenderCadenceMetrics mMetrics;
+};
+
+const char* RenderCadenceActionName(RenderCadenceAction action);
--- a/src/video/RenderOutputQueue.cpp
+++ b/src/video/RenderOutputQueue.cpp
@@ -0,0 +1,93 @@
+#include "RenderOutputQueue.h"
+
+RenderOutputQueue::RenderOutputQueue(const VideoPlayoutPolicy& policy) :
+	mPolicy(NormalizeVideoPlayoutPolicy(policy))
+{
+}
+
+void RenderOutputQueue::Configure(const VideoPlayoutPolicy& policy)
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	mPolicy = NormalizeVideoPlayoutPolicy(policy);
+	while (mReadyFrames.size() > CapacityLocked())
+	{
+		ReleaseFrame(mReadyFrames.front());
+		mReadyFrames.pop_front();
+		++mDroppedCount;
+	}
+}
+
+bool RenderOutputQueue::Push(RenderOutputFrame frame)
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	if (mReadyFrames.size() >= CapacityLocked())
+	{
+		ReleaseFrame(mReadyFrames.front());
+		mReadyFrames.pop_front();
+		++mDroppedCount;
+	}
+
+	mReadyFrames.push_back(frame);
+	++mPushedCount;
+	return true;
+}
+
+bool RenderOutputQueue::TryPop(RenderOutputFrame& frame)
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	if (mReadyFrames.empty())
+	{
+		++mUnderrunCount;
+		return false;
+	}
+
+	frame = mReadyFrames.front();
+	mReadyFrames.pop_front();
+	++mPoppedCount;
+	return true;
+}
+
+bool RenderOutputQueue::DropOldestFrame()
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	if (mReadyFrames.empty())
+		return false;
+
+	ReleaseFrame(mReadyFrames.front());
+	mReadyFrames.pop_front();
+	++mDroppedCount;
+	return true;
+}
+
+void RenderOutputQueue::Clear()
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	for (RenderOutputFrame& frame : mReadyFrames)
+		ReleaseFrame(frame);
+	mReadyFrames.clear();
+}
+
+RenderOutputQueueMetrics RenderOutputQueue::GetMetrics() const
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	RenderOutputQueueMetrics metrics;
+	metrics.depth = mReadyFrames.size();
+	metrics.capacity = CapacityLocked();
+	metrics.pushedCount = mPushedCount;
+	metrics.poppedCount = mPoppedCount;
+	metrics.droppedCount = mDroppedCount;
+	metrics.underrunCount = mUnderrunCount;
+	return metrics;
+}
+
+std::size_t RenderOutputQueue::CapacityLocked() const
+{
+	return static_cast<std::size_t>(mPolicy.maxReadyFrames);
+}
+
+void RenderOutputQueue::ReleaseFrame(RenderOutputFrame& frame)
+{
+	if (frame.releaseFrame)
+		frame.releaseFrame(frame.frame);
+	frame.releaseFrame = {};
+}
--- a/src/video/RenderOutputQueue.h
+++ b/src/video/RenderOutputQueue.h
@@ -0,0 +1,52 @@
+#pragma once
+
+#include "VideoIOTypes.h"
+#include "VideoPlayoutPolicy.h"
+
+#include <cstdint>
+#include <deque>
+#include <functional>
+#include <mutex>
+
+struct RenderOutputFrame
+{
+	VideoIOOutputFrame frame;
+	uint64_t frameIndex = 0;
+	bool stale = false;
+	std::function<void(VideoIOOutputFrame& frame)> releaseFrame;
+};
+
+struct RenderOutputQueueMetrics
+{
+	std::size_t depth = 0;
+	std::size_t capacity = 0;
+	uint64_t pushedCount = 0;
+	uint64_t poppedCount = 0;
+	uint64_t droppedCount = 0;
+	uint64_t underrunCount = 0;
+};
+
+class RenderOutputQueue
+{
+public:
+	explicit RenderOutputQueue(const VideoPlayoutPolicy& policy = VideoPlayoutPolicy());
+
+	void Configure(const VideoPlayoutPolicy& policy);
+	bool Push(RenderOutputFrame frame);
+	bool TryPop(RenderOutputFrame& frame);
+	bool DropOldestFrame();
+	void Clear();
+	RenderOutputQueueMetrics GetMetrics() const;
+
+private:
+	std::size_t CapacityLocked() const;
+	static void ReleaseFrame(RenderOutputFrame& frame);
+
+	mutable std::mutex mMutex;
+	VideoPlayoutPolicy mPolicy;
+	std::deque<RenderOutputFrame> mReadyFrames;
+	uint64_t mPushedCount = 0;
+	uint64_t mPoppedCount = 0;
+	uint64_t mDroppedCount = 0;
+	uint64_t mUnderrunCount = 0;
+};
--- a/src/video/SystemOutputFramePool.cpp
+++ b/src/video/SystemOutputFramePool.cpp
@@ -0,0 +1,260 @@
+#include "SystemOutputFramePool.h"
+
+#include <algorithm>
+
+namespace
+{
+SystemOutputFramePoolConfig NormalizeConfig(SystemOutputFramePoolConfig config)
+{
+	if (config.rowBytes == 0)
+		config.rowBytes = VideoIORowBytes(config.pixelFormat, config.width);
+	return config;
+}
+}
+
+SystemOutputFramePool::SystemOutputFramePool(const SystemOutputFramePoolConfig& config)
+{
+	Configure(config);
+}
+
+void SystemOutputFramePool::Configure(const SystemOutputFramePoolConfig& config)
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	mConfig = NormalizeConfig(config);
+	mReadySlots.clear();
+	mSlots.clear();
+	mSlots.resize(mConfig.capacity);
+
+	const std::size_t byteCount = FrameByteCount();
+	for (StoredSlot& slot : mSlots)
+	{
+		slot.bytes.resize(byteCount);
+		slot.state = OutputFrameSlotState::Free;
+		++slot.generation;
+	}
+
+	mAcquireMissCount = 0;
+	mReadyUnderrunCount = 0;
+}
+
+SystemOutputFramePoolConfig SystemOutputFramePool::Config() const
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	return mConfig;
+}
+
+bool SystemOutputFramePool::AcquireFreeSlot(OutputFrameSlot& slot)
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	for (std::size_t index = 0; index < mSlots.size(); ++index)
+	{
+		if (mSlots[index].state != OutputFrameSlotState::Free)
+			continue;
+
+		mSlots[index].state = OutputFrameSlotState::Rendering;
+		++mSlots[index].generation;
+		FillOutputSlotLocked(index, slot);
+		return true;
+	}
+
+	slot = OutputFrameSlot();
+	++mAcquireMissCount;
+	return false;
+}
+
+bool SystemOutputFramePool::AcquireRenderingSlot(OutputFrameSlot& slot)
+{
+	return AcquireFreeSlot(slot);
+}
+
+bool SystemOutputFramePool::PublishReadySlot(const OutputFrameSlot& slot)
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	if (!TransitionSlotLocked(slot, OutputFrameSlotState::Rendering, OutputFrameSlotState::Completed))
+		return false;
+
+	mReadySlots.push_back(slot.index);
+	return true;
+}
+
+bool SystemOutputFramePool::PublishCompletedSlot(const OutputFrameSlot& slot)
+{
+	return PublishReadySlot(slot);
+}
+
+bool SystemOutputFramePool::ConsumeReadySlot(OutputFrameSlot& slot)
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	while (!mReadySlots.empty())
+	{
+		const std::size_t index = mReadySlots.front();
+		mReadySlots.pop_front();
+		if (index >= mSlots.size() || mSlots[index].state != OutputFrameSlotState::Completed)
+			continue;
+
+		FillOutputSlotLocked(index, slot);
+		return true;
+	}
+
+	slot = OutputFrameSlot();
+	++mReadyUnderrunCount;
+	return false;
+}
+
+bool SystemOutputFramePool::ConsumeCompletedSlot(OutputFrameSlot& slot)
+{
+	return ConsumeReadySlot(slot);
+}
+
+bool SystemOutputFramePool::MarkScheduled(const OutputFrameSlot& slot)
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	if (!IsValidSlotLocked(slot))
+		return false;
+	if (mSlots[slot.index].state != OutputFrameSlotState::Completed)
+		return false;
+
+	RemoveReadyIndexLocked(slot.index);
+	mSlots[slot.index].state = OutputFrameSlotState::Scheduled;
+	return true;
+}
+
+bool SystemOutputFramePool::MarkScheduledByBuffer(void* bytes)
+{
+	if (bytes == nullptr)
+		return false;
+
+	std::lock_guard<std::mutex> lock(mMutex);
+	for (std::size_t index = 0; index < mSlots.size(); ++index)
+	{
+		if (mSlots[index].bytes.empty() || mSlots[index].bytes.data() != bytes)
+			continue;
+		if (mSlots[index].state != OutputFrameSlotState::Completed)
+			return false;
+
+		RemoveReadyIndexLocked(index);
+		mSlots[index].state = OutputFrameSlotState::Scheduled;
+		return true;
+	}
+	return false;
+}
+
+bool SystemOutputFramePool::ReleaseSlot(const OutputFrameSlot& slot)
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	if (!IsValidSlotLocked(slot) || mSlots[slot.index].state == OutputFrameSlotState::Free)
+		return false;
+
+	return ReleaseSlotByIndexLocked(slot.index);
+}
+
+bool SystemOutputFramePool::ReleaseScheduledSlot(const OutputFrameSlot& slot)
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	return TransitionSlotLocked(slot, OutputFrameSlotState::Scheduled, OutputFrameSlotState::Free);
+}
+
+bool SystemOutputFramePool::ReleaseSlotByBuffer(void* bytes)
+{
+	if (bytes == nullptr)
+		return false;
+
+	std::lock_guard<std::mutex> lock(mMutex);
+	for (std::size_t index = 0; index < mSlots.size(); ++index)
+	{
+		if (!mSlots[index].bytes.empty() && mSlots[index].bytes.data() == bytes)
+			return ReleaseSlotByIndexLocked(index);
+	}
+	return false;
+}
+
+void SystemOutputFramePool::Clear()
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	mReadySlots.clear();
+	for (StoredSlot& slot : mSlots)
+	{
+		slot.state = OutputFrameSlotState::Free;
+		++slot.generation;
+	}
+}
+
+SystemOutputFramePoolMetrics SystemOutputFramePool::GetMetrics() const
+{
+	std::lock_guard<std::mutex> lock(mMutex);
+	SystemOutputFramePoolMetrics metrics;
+	metrics.capacity = mSlots.size();
+	metrics.readyCount = mReadySlots.size();
+	metrics.acquireMissCount = mAcquireMissCount;
+	metrics.readyUnderrunCount = mReadyUnderrunCount;
+
+	for (const StoredSlot& slot : mSlots)
+	{
+		switch (slot.state)
+		{
+		case OutputFrameSlotState::Free:
+			++metrics.freeCount;
+			break;
+		case OutputFrameSlotState::Rendering:
+			++metrics.renderingCount;
+			++metrics.acquiredCount;
+			break;
+		case OutputFrameSlotState::Completed:
+			++metrics.completedCount;
+			break;
+		case OutputFrameSlotState::Scheduled:
+			++metrics.scheduledCount;
+			break;
+		}
+	}
+
+	return metrics;
+}
+
+bool SystemOutputFramePool::IsValidSlotLocked(const OutputFrameSlot& slot) const
+{
+	return slot.index < mSlots.size() && mSlots[slot.index].generation == slot.generation;
+}
+
+bool SystemOutputFramePool::TransitionSlotLocked(const OutputFrameSlot& slot, OutputFrameSlotState expectedState, OutputFrameSlotState nextState)
+{
+	if (!IsValidSlotLocked(slot) || mSlots[slot.index].state != expectedState)
+		return false;
+
+	mSlots[slot.index].state = nextState;
+	return true;
+}
+
+void SystemOutputFramePool::FillOutputSlotLocked(std::size_t index, OutputFrameSlot& slot)
+{
+	StoredSlot& storedSlot = mSlots[index];
+	slot.index = index;
+	slot.generation = storedSlot.generation;
+	slot.frame.bytes = storedSlot.bytes.empty() ? nullptr : storedSlot.bytes.data();
+	slot.frame.rowBytes = static_cast<long>(mConfig.rowBytes);
+	slot.frame.width = mConfig.width;
+	slot.frame.height = mConfig.height;
+	slot.frame.pixelFormat = mConfig.pixelFormat;
+	slot.frame.nativeFrame = nullptr;
+	slot.frame.nativeBuffer = slot.frame.bytes;
+}
+
+void SystemOutputFramePool::RemoveReadyIndexLocked(std::size_t index)
+{
+	mReadySlots.erase(std::remove(mReadySlots.begin(), mReadySlots.end(), index), mReadySlots.end());
+}
+
+bool SystemOutputFramePool::ReleaseSlotByIndexLocked(std::size_t index)
+{
+	if (index >= mSlots.size() || mSlots[index].state == OutputFrameSlotState::Free)
+		return false;
+
+	RemoveReadyIndexLocked(index);
+	mSlots[index].state = OutputFrameSlotState::Free;
+	return true;
+}
+
+std::size_t SystemOutputFramePool::FrameByteCount() const
+{
+	return static_cast<std::size_t>(mConfig.rowBytes) * static_cast<std::size_t>(mConfig.height);
+}
--- a/src/video/SystemOutputFramePool.h
+++ b/src/video/SystemOutputFramePool.h
@@ -0,0 +1,94 @@
+#pragma once
+
+#include "VideoIOTypes.h"
+
+#include <cstddef>
+#include <cstdint>
+#include <deque>
+#include <mutex>
+#include <vector>
+
+enum class OutputFrameSlotState
+{
+	Free,
+	Rendering,
+	Completed,
+	Scheduled
+};
+
+struct SystemOutputFramePoolConfig
+{
+	unsigned width = 0;
+	unsigned height = 0;
+	VideoIOPixelFormat pixelFormat = VideoIOPixelFormat::Bgra8;
+	unsigned rowBytes = 0;
+	std::size_t capacity = 0;
+};
+
+struct OutputFrameSlot
+{
+	VideoIOOutputFrame frame;
+	std::size_t index = 0;
+	uint64_t generation = 0;
+};
+
+struct SystemOutputFramePoolMetrics
+{
+	std::size_t capacity = 0;
+	std::size_t freeCount = 0;
+	std::size_t renderingCount = 0;
+	std::size_t completedCount = 0;
+	std::size_t scheduledCount = 0;
+	std::size_t acquiredCount = 0;
+	std::size_t readyCount = 0;
+	std::size_t consumedCount = 0;
+	uint64_t acquireMissCount = 0;
+	uint64_t readyUnderrunCount = 0;
+};
+
+class SystemOutputFramePool
+{
+public:
+	SystemOutputFramePool() = default;
+	explicit SystemOutputFramePool(const SystemOutputFramePoolConfig& config);
+
+	void Configure(const SystemOutputFramePoolConfig& config);
+	SystemOutputFramePoolConfig Config() const;
+
+	bool AcquireFreeSlot(OutputFrameSlot& slot);
+	bool AcquireRenderingSlot(OutputFrameSlot& slot);
+	bool PublishReadySlot(const OutputFrameSlot& slot);
+	bool PublishCompletedSlot(const OutputFrameSlot& slot);
+	bool ConsumeReadySlot(OutputFrameSlot& slot);
+	bool ConsumeCompletedSlot(OutputFrameSlot& slot);
+	bool MarkScheduled(const OutputFrameSlot& slot);
+	bool MarkScheduledByBuffer(void* bytes);
+	bool ReleaseSlot(const OutputFrameSlot& slot);
+	bool ReleaseScheduledSlot(const OutputFrameSlot& slot);
+	bool ReleaseSlotByBuffer(void* bytes);
+	void Clear();
+
+	SystemOutputFramePoolMetrics GetMetrics() const;
+
+private:
+	struct StoredSlot
+	{
+		std::vector<unsigned char> bytes;
+		OutputFrameSlotState state = OutputFrameSlotState::Free;
+		uint64_t generation = 1;
+	};
+
+	bool IsValidSlotLocked(const OutputFrameSlot& slot) const;
+	bool TransitionSlotLocked(const OutputFrameSlot& slot, OutputFrameSlotState expectedState, OutputFrameSlotState nextState);
+	void FillOutputSlotLocked(std::size_t index, OutputFrameSlot& slot);
+	void RemoveReadyIndexLocked(std::size_t index);
+	bool ReleaseSlotByIndexLocked(std::size_t index);
+	std::size_t FrameByteCount() const;
+
+	mutable std::mutex mMutex;
+	SystemOutputFramePoolConfig mConfig;
+	std::vector<StoredSlot> mSlots;
+	std::deque<std::size_t> mReadySlots;
+	uint64_t mAcquireMissCount = 0;
+	uint64_t mReadyUnderrunCount = 0;
+};
--- a/src/video/VideoBackend.cpp
+++ b/src/video/VideoBackend.cpp
--- a/src/video/VideoBackend.h
+++ b/src/video/VideoBackend.h
@@ -0,0 +1,161 @@
+#pragma once
+
+#include "OutputProductionController.h"
+#include "RenderCadenceController.h"
+#include "RenderOutputQueue.h"
+#include "SystemOutputFramePool.h"
+#include "VideoBackendLifecycle.h"
+#include "VideoIOTypes.h"
+#include "VideoPlayoutPolicy.h"
+
+#include <chrono>
+#include <condition_variable>
+#include <cstdint>
+#include <deque>
+#include <memory>
+#include <mutex>
+#include <string>
+#include <thread>
+
+class HealthTelemetry;
+class OpenGLVideoIOBridge;
+class RenderEngine;
+class RuntimeEventDispatcher;
+class VideoIODevice;
+
+class VideoBackend
+{
+public:
+	VideoBackend(RenderEngine& renderEngine, HealthTelemetry& healthTelemetry, RuntimeEventDispatcher& runtimeEventDispatcher);
+	~VideoBackend();
+
+	void ReleaseResources();
+	VideoBackendLifecycleState LifecycleState() const;
+	bool DiscoverDevicesAndModes(const VideoFormatSelection& videoModes, std::string& error);
+	bool SelectPreferredFormats(const VideoFormatSelection& videoModes, bool outputAlphaRequired, std::string& error);
+	bool ConfigureInput(const VideoFormat& inputVideoMode, std::string& error);
+	bool ConfigureOutput(const VideoFormat& outputVideoMode, bool externalKeyingEnabled, std::string& error);
+	bool Start();
+	bool Stop();
+
+	const VideoIOState& State() const;
+	VideoIOState& MutableState();
+	bool BeginOutputFrame(VideoIOOutputFrame& frame);
+	void EndOutputFrame(VideoIOOutputFrame& frame);
+	bool ScheduleOutputFrame(const VideoIOOutputFrame& frame);
+	VideoPlayoutRecoveryDecision AccountForCompletionResult(VideoIOCompletionResult result, uint64_t readyQueueDepth);
+	void RecordBackendPlayoutHealth(VideoIOCompletionResult result, const VideoPlayoutRecoveryDecision& recoveryDecision);
+
+	bool HasInputDevice() const;
+	bool HasInputSource() const;
+	unsigned InputFrameWidth() const;
+	unsigned InputFrameHeight() const;
+	unsigned OutputFrameWidth() const;
+	unsigned OutputFrameHeight() const;
+	unsigned CaptureTextureWidth() const;
+	unsigned OutputPackTextureWidth() const;
+	VideoIOPixelFormat InputPixelFormat() const;
+	const std::string& InputDisplayModeName() const;
+	const std::string& OutputModelName() const;
+	bool SupportsInternalKeying() const;
+	bool SupportsExternalKeying() const;
+	bool KeyerInterfaceAvailable() const;
+	bool ExternalKeyingActive() const;
+	const std::string& StatusMessage() const;
+	bool ShouldPrioritizeOutputOverPreview() const;
+	void SetStatusMessage(const std::string& message);
+	void PublishStatus(bool externalKeyingConfigured, const std::string& statusMessage = std::string());
+	void ReportNoInputDeviceSignalStatus();
+
+private:
+	void HandleInputFrame(const VideoIOFrame& frame);
+	void HandleOutputFrameCompletion(const VideoIOCompletion& completion);
+	void StartOutputCompletionWorker();
+	void StopOutputCompletionWorker();
+	void OutputCompletionWorkerMain();
+	void StartOutputProducerWorker();
+	void StopOutputProducerWorker();
+	void OutputProducerWorkerMain();
+	void NotifyOutputProducer();
+	bool WarmupOutputPreroll();
+	std::chrono::milliseconds OutputProducerWakeInterval() const;
+	void ProcessOutputFrameCompletion(const VideoIOCompletion& completion);
+	std::size_t ProduceReadyOutputFrames(const VideoIOCompletion& completion, std::size_t maxFrames);
+	OutputProductionPressure BuildOutputProductionPressure(const RenderOutputQueueMetrics& metrics) const;
+	bool RenderReadyOutputFrame(const VideoIOState& state, const VideoIOCompletion& completion);
+	std::size_t ScheduleReadyOutputFramesToTarget();
+	bool ScheduleReadyOutputFrame();
+	bool ScheduleBlackUnderrunFrame();
+	void RecordFramePacing(VideoIOCompletionResult completionResult);
+	void RecordReadyQueueDepthSample(const RenderOutputQueueMetrics& metrics);
+	void RecordDeckLinkBufferTelemetry();
+	void RecordSystemMemoryPlayoutStats();
+	void RecordOutputRenderDuration(double renderMilliseconds, double acquireMilliseconds, double renderRequestMilliseconds, double endAccessMilliseconds);
+	bool ApplyLifecycleTransition(VideoBackendLifecycleState state, const std::string& message);
+	bool ApplyLifecycleFailure(const std::string& message);
+	void PublishBackendStateChanged(const std::string& state, const std::string& message);
+	void PublishInputSignalChanged(const VideoIOFrame& frame, const VideoIOState& state);
+	void PublishInputFrameArrived(const VideoIOFrame& frame);
+	void PublishOutputFrameScheduled(const VideoIOOutputFrame& frame);
+	void PublishOutputFrameCompleted(const VideoIOCompletion& completion);
+	void PublishTimingSample(const std::string& subsystem, const std::string& metric, double value, const std::string& unit);
+	static std::string CompletionResultName(VideoIOCompletionResult result);
+	static std::string PixelFormatName(VideoIOPixelFormat pixelFormat);
+	static bool IsEnvironmentFlagEnabled(const char* name);
+
+	HealthTelemetry& mHealthTelemetry;
+	RuntimeEventDispatcher& mRuntimeEventDispatcher;
+	VideoBackendLifecycle mLifecycle;
+	VideoPlayoutPolicy mPlayoutPolicy;
+	OutputProductionController mOutputProductionController;
+	RenderCadenceController mRenderCadenceController;
+	RenderOutputQueue mReadyOutputQueue;
+	SystemOutputFramePool mSystemOutputFramePool;
+	std::unique_ptr<VideoIODevice> mVideoIODevice;
+	std::unique_ptr<OpenGLVideoIOBridge> mBridge;
+	std::mutex mOutputCompletionMutex;
+	std::condition_variable mOutputCompletionCondition;
+	std::deque<VideoIOCompletion> mPendingOutputCompletions;
+	std::thread mOutputCompletionWorker;
+	std::mutex mOutputProducerMutex;
+	std::condition_variable mOutputProducerCondition;
+	std::thread mOutputProducerWorker;
+	VideoIOCompletion mLastOutputProductionCompletion;
+	std::chrono::steady_clock::time_point mLastOutputProductionTime;
+	std::mutex mOutputProductionMutex;
+	std::mutex mOutputSchedulingMutex;
+	mutable std::mutex mOutputMetricsMutex;
+	bool mOutputCompletionWorkerRunning = false;
+	bool mOutputCompletionWorkerStopping = false;
+	bool mOutputProducerWorkerRunning = false;
+	bool mOutputProducerWorkerStopping = false;
+	bool mInputCaptureDisabled = false;
+	uint64_t mNextReadyOutputFrameIndex = 0;
+	uint64_t mInputFrameIndex = 0;
+	uint64_t mOutputFrameScheduleIndex = 0;
+	uint64_t mOutputFrameCompletionIndex = 0;
+	bool mHasLastInputSignal = false;
+	bool mLastInputSignal = false;
+	unsigned mLastInputSignalWidth = 0;
+	unsigned mLastInputSignalHeight = 0;
+	std::string mLastInputSignalModeName;
+	std::chrono::steady_clock::time_point mLastPlayoutCompletionTime;
+	double mCompletionIntervalMilliseconds = 0.0;
+	double mSmoothedCompletionIntervalMilliseconds = 0.0;
+	double mMaxCompletionIntervalMilliseconds = 0.0;
+	bool mHasReadyQueueDepthBaseline = false;
+	std::size_t mMinReadyQueueDepth = 0;
+	std::size_t mMaxReadyQueueDepth = 0;
+	uint64_t mReadyQueueZeroDepthCount = 0;
+	double mOutputRenderMilliseconds = 0.0;
+	double mSmoothedOutputRenderMilliseconds = 0.0;
+	double mMaxOutputRenderMilliseconds = 0.0;
+	double mOutputFrameAcquireMilliseconds = 0.0;
+	double mOutputFrameRenderRequestMilliseconds = 0.0;
+	double mOutputFrameEndAccessMilliseconds = 0.0;
+	uint64_t mLastLateStreak = 0;
+	uint64_t mLastDropStreak = 0;
+	uint64_t mLateFrameCount = 0;
+	uint64_t mDroppedFrameCount = 0;
+	uint64_t mFlushedFrameCount = 0;
+};
--- a/src/video/VideoBackendLifecycle.cpp
+++ b/src/video/VideoBackendLifecycle.cpp
@@ -0,0 +1,123 @@
+#include "VideoBackendLifecycle.h"
+
+VideoBackendLifecycleState VideoBackendLifecycle::State() const
+{
+	return mState;
+}
+
+const std::string& VideoBackendLifecycle::FailureReason() const
+{
+	return mFailureReason;
+}
+
+VideoBackendLifecycleTransition VideoBackendLifecycle::TransitionTo(VideoBackendLifecycleState next, const std::string& reason)
+{
+	VideoBackendLifecycleTransition transition;
+	transition.previous = mState;
+	transition.current = next;
+	transition.reason = reason;
+	transition.accepted = CanTransition(mState, next);
+	if (!transition.accepted)
+	{
+		transition.current = mState;
+		transition.errorMessage = std::string("Invalid video backend lifecycle transition from ") +
+			StateName(mState) + " to " + StateName(next) + ".";
+		return transition;
+	}
+
+	mState = next;
+	transition.current = mState;
+	if (mState != VideoBackendLifecycleState::Failed)
+		mFailureReason.clear();
+	return transition;
+}
+
+VideoBackendLifecycleTransition VideoBackendLifecycle::Fail(const std::string& reason)
+{
+	VideoBackendLifecycleTransition transition = TransitionTo(VideoBackendLifecycleState::Failed, reason);
+	if (transition.accepted)
+		mFailureReason = reason;
+	return transition;
+}
+
+bool VideoBackendLifecycle::CanTransition(VideoBackendLifecycleState current, VideoBackendLifecycleState next)
+{
+	if (current == next)
+		return true;
+
+	switch (current)
+	{
+	case VideoBackendLifecycleState::Uninitialized:
+		return next == VideoBackendLifecycleState::Discovering ||
+			next == VideoBackendLifecycleState::Stopped ||
+			next == VideoBackendLifecycleState::Failed;
+	case VideoBackendLifecycleState::Discovering:
+		return next == VideoBackendLifecycleState::Discovered ||
+			next == VideoBackendLifecycleState::Failed;
+	case VideoBackendLifecycleState::Discovered:
+		return next == VideoBackendLifecycleState::Configuring ||
+			next == VideoBackendLifecycleState::Stopped ||
+			next == VideoBackendLifecycleState::Failed;
+	case VideoBackendLifecycleState::Configuring:
+		return next == VideoBackendLifecycleState::Configured ||
+			next == VideoBackendLifecycleState::Failed;
+	case VideoBackendLifecycleState::Configured:
+		return next == VideoBackendLifecycleState::Prerolling ||
+			next == VideoBackendLifecycleState::Stopped ||
+			next == VideoBackendLifecycleState::Failed;
+	case VideoBackendLifecycleState::Prerolling:
+		return next == VideoBackendLifecycleState::Running ||
+			next == VideoBackendLifecycleState::Stopping ||
+			next == VideoBackendLifecycleState::Failed;
+	case VideoBackendLifecycleState::Running:
+		return next == VideoBackendLifecycleState::Degraded ||
+			next == VideoBackendLifecycleState::Stopping ||
+			next == VideoBackendLifecycleState::Failed;
+	case VideoBackendLifecycleState::Degraded:
+		return next == VideoBackendLifecycleState::Running ||
+			next == VideoBackendLifecycleState::Stopping ||
+			next == VideoBackendLifecycleState::Failed;
+	case VideoBackendLifecycleState::Stopping:
+		return next == VideoBackendLifecycleState::Stopped ||
+			next == VideoBackendLifecycleState::Failed;
+	case VideoBackendLifecycleState::Stopped:
+		return next == VideoBackendLifecycleState::Discovering ||
+			next == VideoBackendLifecycleState::Failed;
+	case VideoBackendLifecycleState::Failed:
+		return next == VideoBackendLifecycleState::Stopped ||
+			next == VideoBackendLifecycleState::Discovering;
+	default:
+		return false;
+	}
+}
+
+const char* VideoBackendLifecycle::StateName(VideoBackendLifecycleState state)
+{
+	switch (state)
+	{
+	case VideoBackendLifecycleState::Uninitialized:
+		return "uninitialized";
+	case VideoBackendLifecycleState::Discovering:
+		return "discovering";
+	case VideoBackendLifecycleState::Discovered:
+		return "discovered";
+	case VideoBackendLifecycleState::Configuring:
+		return "configuring";
+	case VideoBackendLifecycleState::Configured:
+		return "configured";
+	case VideoBackendLifecycleState::Prerolling:
+		return "prerolling";
+	case VideoBackendLifecycleState::Running:
+		return "running";
+	case VideoBackendLifecycleState::Degraded:
+		return "degraded";
+	case VideoBackendLifecycleState::Stopping:
+		return "stopping";
+	case VideoBackendLifecycleState::Stopped:
+		return "stopped";
+	case VideoBackendLifecycleState::Failed:
+		return "failed";
+	default:
+		return "unknown";
+	}
+}
--- a/src/video/VideoBackendLifecycle.h
+++ b/src/video/VideoBackendLifecycle.h
@@ -0,0 +1,43 @@
+#pragma once
+
+#include <string>
+
+enum class VideoBackendLifecycleState
+{
+	Uninitialized,
+	Discovering,
+	Discovered,
+	Configuring,
+	Configured,
+	Prerolling,
+	Running,
+	Degraded,
+	Stopping,
+	Stopped,
+	Failed
+};
+
+struct VideoBackendLifecycleTransition
+{
+	VideoBackendLifecycleState previous = VideoBackendLifecycleState::Uninitialized;
+	VideoBackendLifecycleState current = VideoBackendLifecycleState::Uninitialized;
+	bool accepted = false;
+	std::string reason;
+	std::string errorMessage;
+};
+
+class VideoBackendLifecycle
+{
+public:
+	VideoBackendLifecycleState State() const;
+	const std::string& FailureReason() const;
+	VideoBackendLifecycleTransition TransitionTo(VideoBackendLifecycleState next, const std::string& reason);
+	VideoBackendLifecycleTransition Fail(const std::string& reason);
+
+	static bool CanTransition(VideoBackendLifecycleState current, VideoBackendLifecycleState next);
+	static const char* StateName(VideoBackendLifecycleState state);
+
+private:
+	VideoBackendLifecycleState mState = VideoBackendLifecycleState::Uninitialized;
+	std::string mFailureReason;
+};
--- a/src/video/VideoIOFormat.cpp
+++ b/src/video/VideoIOFormat.cpp
@@ -0,0 +1,170 @@
+#include "VideoIOFormat.h"
+
+#include <algorithm>
+#include <cmath>
+
+#ifdef min
+#undef min
+#endif
+#ifdef max
+#undef max
+#endif
+
+namespace
+{
+uint16_t Clamp10(int value, int minimum, int maximum)
+{
+	return static_cast<uint16_t>(std::max(minimum, std::min(maximum, value)));
+}
+
+uint32_t MakeV210Word(uint16_t a, uint16_t b, uint16_t c)
+{
+	return (static_cast<uint32_t>(a) & 0x3ffu)
+		| ((static_cast<uint32_t>(b) & 0x3ffu) << 10)
+		| ((static_cast<uint32_t>(c) & 0x3ffu) << 20);
+}
+
+void StoreWord(std::array<uint8_t, 16>& bytes, std::size_t wordIndex, uint32_t word)
+{
+	const std::size_t offset = wordIndex * 4;
+	bytes[offset + 0] = static_cast<uint8_t>(word & 0xffu);
+	bytes[offset + 1] = static_cast<uint8_t>((word >> 8) & 0xffu);
+	bytes[offset + 2] = static_cast<uint8_t>((word >> 16) & 0xffu);
+	bytes[offset + 3] = static_cast<uint8_t>((word >> 24) & 0xffu);
+}
+
+uint32_t LoadWord(const std::array<uint8_t, 16>& bytes, std::size_t wordIndex)
+{
+	const std::size_t offset = wordIndex * 4;
+	return static_cast<uint32_t>(bytes[offset + 0])
+		| (static_cast<uint32_t>(bytes[offset + 1]) << 8)
+		| (static_cast<uint32_t>(bytes[offset + 2]) << 16)
+		| (static_cast<uint32_t>(bytes[offset + 3]) << 24);
+}
+
+uint16_t Component(uint32_t word, unsigned index)
+{
+	return static_cast<uint16_t>((word >> (index * 10)) & 0x3ffu);
+}
+}
+
+const char* VideoIOPixelFormatName(VideoIOPixelFormat format)
+{
+	switch (format)
+	{
+	case VideoIOPixelFormat::V210:
+		return "10-bit YUV v210";
+	case VideoIOPixelFormat::Yuva10:
+		return "10-bit YUVA Ay10";
+	case VideoIOPixelFormat::Bgra8:
+		return "8-bit BGRA";
+	case VideoIOPixelFormat::Uyvy8:
+	default:
+		return "8-bit YUV UYVY";
+	}
+}
+
+bool VideoIOPixelFormatIsTenBit(VideoIOPixelFormat format)
+{
+	return format == VideoIOPixelFormat::V210 || format == VideoIOPixelFormat::Yuva10;
+}
+
+VideoIOPixelFormat ChoosePreferredVideoIOFormat(bool tenBitSupported)
+{
+	return tenBitSupported ? VideoIOPixelFormat::V210 : VideoIOPixelFormat::Uyvy8;
+}
+
+unsigned VideoIOBytesPerPixel(VideoIOPixelFormat format)
+{
+	switch (format)
+	{
+	case VideoIOPixelFormat::Uyvy8:
+		return 2u;
+	case VideoIOPixelFormat::Bgra8:
+		return 4u;
+	case VideoIOPixelFormat::Yuva10:
+		return 4u;
+	case VideoIOPixelFormat::V210:
+	default:
+		return 0u;
+	}
+}
+
+unsigned VideoIORowBytes(VideoIOPixelFormat format, unsigned frameWidth)
+{
+	if (format == VideoIOPixelFormat::V210)
+		return MinimumV210RowBytes(frameWidth);
+	if (format == VideoIOPixelFormat::Yuva10)
+		return MinimumYuva10RowBytes(frameWidth);
+	return frameWidth * VideoIOBytesPerPixel(format);
+}
+
+unsigned PackedTextureWidthFromRowBytes(unsigned rowBytes)
+{
+	return (rowBytes + 3u) / 4u;
+}
+
+unsigned MinimumV210RowBytes(unsigned frameWidth)
+{
+	return ((frameWidth + 5u) / 6u) * 16u;
+}
+
+unsigned MinimumYuva10RowBytes(unsigned frameWidth)
+{
+	return ((frameWidth + 63u) / 64u) * 256u;
+}
+
+unsigned ActiveV210WordsForWidth(unsigned frameWidth)
+{
+	return ((frameWidth + 5u) / 6u) * 4u;
+}
+
+V210CodeValues Rec709RgbToLegalV210(float red, float green, float blue)
+{
+	red = std::max(0.0f, std::min(1.0f, red));
+	green = std::max(0.0f, std::min(1.0f, green));
+	blue = std::max(0.0f, std::min(1.0f, blue));
+
+	const float y = 0.2126f * red + 0.7152f * green + 0.0722f * blue;
+	const float cb = (blue - y) / 1.8556f + 0.5f;
+	const float cr = (red - y) / 1.5748f + 0.5f;
+
+	V210CodeValues values;
+	values.y = Clamp10(static_cast<int>(std::lround(64.0f + y * 876.0f)), 64, 940);
+	values.cb = Clamp10(static_cast<int>(std::lround(64.0f + cb * 896.0f)), 64, 960);
+	values.cr = Clamp10(static_cast<int>(std::lround(64.0f + cr * 896.0f)), 64, 960);
+	return values;
+}
+
+std::array<uint8_t, 16> PackV210Block(const V210SixPixelBlock& block)
+{
+	std::array<uint8_t, 16> bytes = {};
+	StoreWord(bytes, 0, MakeV210Word(block.cb[0], block.y[0], block.cr[0]));
+	StoreWord(bytes, 1, MakeV210Word(block.y[1], block.cb[1], block.y[2]));
+	StoreWord(bytes, 2, MakeV210Word(block.cr[1], block.y[3], block.cb[2]));
+	StoreWord(bytes, 3, MakeV210Word(block.y[4], block.cr[2], block.y[5]));
+	return bytes;
+}
+
+V210SixPixelBlock UnpackV210Block(const std::array<uint8_t, 16>& bytes)
+{
+	const uint32_t word0 = LoadWord(bytes, 0);
+	const uint32_t word1 = LoadWord(bytes, 1);
+	const uint32_t word2 = LoadWord(bytes, 2);
+	const uint32_t word3 = LoadWord(bytes, 3);
+
+	V210SixPixelBlock block;
+	block.cb[0] = Component(word0, 0);
+	block.y[0] = Component(word0, 1);
+	block.cr[0] = Component(word0, 2);
+	block.y[1] = Component(word1, 0);
+	block.cb[1] = Component(word1, 1);
+	block.y[2] = Component(word1, 2);
+	block.cr[1] = Component(word2, 0);
+	block.y[3] = Component(word2, 1);
+	block.cb[2] = Component(word2, 2);
+	block.y[4] = Component(word3, 0);
+	block.cr[2] = Component(word3, 1);
+	block.y[5] = Component(word3, 2);
+	return block;
+}
--- a/src/video/VideoIOFormat.h
+++ b/src/video/VideoIOFormat.h
@@ -0,0 +1,39 @@
+#pragma once
+
+#include <array>
+#include <cstdint>
+
+enum class VideoIOPixelFormat
+{
+	Uyvy8,
+	V210,
+	Yuva10,
+	Bgra8
+};
+
+struct V210CodeValues
+{
+	uint16_t y = 64;
+	uint16_t cb = 512;
+	uint16_t cr = 512;
+};
+
+struct V210SixPixelBlock
+{
+	std::array<uint16_t, 6> y = {};
+	std::array<uint16_t, 3> cb = {};
+	std::array<uint16_t, 3> cr = {};
+};
+
+const char* VideoIOPixelFormatName(VideoIOPixelFormat format);
+bool VideoIOPixelFormatIsTenBit(VideoIOPixelFormat format);
+VideoIOPixelFormat ChoosePreferredVideoIOFormat(bool tenBitSupported);
+unsigned VideoIOBytesPerPixel(VideoIOPixelFormat format);
+unsigned VideoIORowBytes(VideoIOPixelFormat format, unsigned frameWidth);
+unsigned PackedTextureWidthFromRowBytes(unsigned rowBytes);
+unsigned MinimumV210RowBytes(unsigned frameWidth);
+unsigned MinimumYuva10RowBytes(unsigned frameWidth);
+unsigned ActiveV210WordsForWidth(unsigned frameWidth);
+V210CodeValues Rec709RgbToLegalV210(float red, float green, float blue);
+std::array<uint8_t, 16> PackV210Block(const V210SixPixelBlock& block);
+V210SixPixelBlock UnpackV210Block(const std::array<uint8_t, 16>& bytes);
--- a/src/video/VideoIOTypes.h
+++ b/src/video/VideoIOTypes.h
@@ -0,0 +1,164 @@
+#pragma once
+
+#include "DeckLinkDisplayMode.h"
+#include "VideoIOFormat.h"
+
+#include <cstdint>
+#include <functional>
+#include <string>
+
+enum class VideoIOBackend
+{
+	DeckLink
+};
+
+enum class VideoIOCompletionResult
+{
+	Completed,
+	DisplayedLate,
+	Dropped,
+	Flushed,
+	Unknown
+};
+
+struct VideoIOConfig
+{
+	VideoFormatSelection videoModes;
+	bool externalKeyingEnabled = false;
+	bool preferTenBit = true;
+};
+
+struct VideoIOState
+{
+	FrameSize inputFrameSize;
+	FrameSize outputFrameSize;
+	VideoIOPixelFormat inputPixelFormat = VideoIOPixelFormat::Uyvy8;
+	VideoIOPixelFormat outputPixelFormat = VideoIOPixelFormat::Bgra8;
+	unsigned inputFrameRowBytes = 0;
+	unsigned outputFrameRowBytes = 0;
+	unsigned captureTextureWidth = 0;
+	unsigned outputPackTextureWidth = 0;
+	std::string inputDisplayModeName = "1080p59.94";
+	std::string outputDisplayModeName = "1080p59.94";
+	std::string outputModelName;
+	std::string statusMessage;
+	std::string formatStatusMessage;
+	bool hasInputDevice = false;
+	bool hasInputSource = false;
+	bool supportsInternalKeying = false;
+	bool supportsExternalKeying = false;
+	bool keyerInterfaceAvailable = false;
+	bool externalKeyingActive = false;
+	double frameBudgetMilliseconds = 0.0;
+	bool actualDeckLinkBufferedFramesAvailable = false;
+	uint64_t actualDeckLinkBufferedFrames = 0;
+	double deckLinkScheduleCallMilliseconds = 0.0;
+	uint64_t deckLinkScheduleFailureCount = 0;
+	bool deckLinkScheduleLeadAvailable = false;
+	int64_t deckLinkPlaybackStreamTime = 0;
+	uint64_t deckLinkPlaybackFrameIndex = 0;
+	uint64_t deckLinkNextScheduleFrameIndex = 0;
+	int64_t deckLinkScheduleLeadFrames = 0;
+	uint64_t deckLinkScheduleRealignmentCount = 0;
+};
+
+struct VideoIOFrame
+{
+	void* bytes = nullptr;
+	long rowBytes = 0;
+	unsigned width = 0;
+	unsigned height = 0;
+	VideoIOPixelFormat pixelFormat = VideoIOPixelFormat::Uyvy8;
+	bool hasNoInputSource = false;
+};
+
+struct VideoIOOutputFrame
+{
+	void* bytes = nullptr;
+	long rowBytes = 0;
+	unsigned width = 0;
+	unsigned height = 0;
+	VideoIOPixelFormat pixelFormat = VideoIOPixelFormat::Bgra8;
+	void* nativeFrame = nullptr;
+	void* nativeBuffer = nullptr;
+};
+
+struct VideoIOCompletion
+{
+	VideoIOCompletionResult result = VideoIOCompletionResult::Completed;
+	void* outputFrameBuffer = nullptr;
+};
+
+struct VideoIOScheduleTime
+{
+	int64_t streamTime = 0;
+	int64_t duration = 0;
+	int64_t timeScale = 0;
+	uint64_t frameIndex = 0;
+};
+
+struct VideoPlayoutRecoveryDecision
+{
+	VideoIOCompletionResult result = VideoIOCompletionResult::Completed;
+	uint64_t completedFrameIndex = 0;
+	uint64_t scheduledFrameIndex = 0;
+	uint64_t readyQueueDepth = 0;
+	uint64_t scheduledLeadFrames = 0;
+	uint64_t measuredLagFrames = 0;
+	uint64_t catchUpFrames = 0;
+	uint64_t lateStreak = 0;
+	uint64_t dropStreak = 0;
+};
+
+class VideoIODevice
+{
+public:
+	using InputFrameCallback = std::function<void(const VideoIOFrame&)>;
+	using OutputFrameCallback = std::function<void(const VideoIOCompletion&)>;
+
+	virtual ~VideoIODevice() = default;
+	virtual void ReleaseResources() = 0;
+	virtual bool DiscoverDevicesAndModes(const VideoFormatSelection& videoModes, std::string& error) = 0;
+	virtual bool SelectPreferredFormats(const VideoFormatSelection& videoModes, bool outputAlphaRequired, std::string& error) = 0;
+	virtual bool ConfigureInput(InputFrameCallback callback, const VideoFormat& inputVideoMode, std::string& error) = 0;
+	virtual bool ConfigureOutput(OutputFrameCallback callback, const VideoFormat& outputVideoMode, bool externalKeyingEnabled, std::string& error) = 0;
+	virtual bool PrepareOutputSchedule() = 0;
+	virtual bool StartInputStreams() = 0;
+	virtual bool StartScheduledPlayback() = 0;
+	virtual bool Start() = 0;
+	virtual bool Stop() = 0;
+	virtual const VideoIOState& State() const = 0;
+	virtual VideoIOState& MutableState() = 0;
+	virtual bool BeginOutputFrame(VideoIOOutputFrame& frame) = 0;
+	virtual void EndOutputFrame(VideoIOOutputFrame& frame) = 0;
+	virtual bool ScheduleOutputFrame(const VideoIOOutputFrame& frame) = 0;
+	virtual VideoPlayoutRecoveryDecision AccountForCompletionResult(VideoIOCompletionResult result, uint64_t readyQueueDepth) = 0;
+
+	bool HasInputDevice() const { return State().hasInputDevice; }
+	bool HasInputSource() const { return State().hasInputSource; }
+	bool InputOutputDimensionsDiffer() const { return State().inputFrameSize != State().outputFrameSize; }
+	const FrameSize& InputFrameSize() const { return State().inputFrameSize; }
+	const FrameSize& OutputFrameSize() const { return State().outputFrameSize; }
+	unsigned InputFrameWidth() const { return State().inputFrameSize.width; }
+	unsigned InputFrameHeight() const { return State().inputFrameSize.height; }
+	unsigned OutputFrameWidth() const { return State().outputFrameSize.width; }
+	unsigned OutputFrameHeight() const { return State().outputFrameSize.height; }
+	VideoIOPixelFormat InputPixelFormat() const { return State().inputPixelFormat; }
+	VideoIOPixelFormat OutputPixelFormat() const { return State().outputPixelFormat; }
+	bool InputIsTenBit() const { return VideoIOPixelFormatIsTenBit(State().inputPixelFormat); }
+	bool OutputIsTenBit() const { return VideoIOPixelFormatIsTenBit(State().outputPixelFormat); }
+	unsigned InputFrameRowBytes() const { return State().inputFrameRowBytes; }
+	unsigned OutputFrameRowBytes() const { return State().outputFrameRowBytes; }
+	unsigned CaptureTextureWidth() const { return State().captureTextureWidth; }
+	unsigned OutputPackTextureWidth() const { return State().outputPackTextureWidth; }
+	const std::string& FormatStatusMessage() const { return State().formatStatusMessage; }
+	const std::string& InputDisplayModeName() const { return State().inputDisplayModeName; }
+	const std::string& OutputModelName() const { return State().outputModelName; }
+	bool SupportsInternalKeying() const { return State().supportsInternalKeying; }
+	bool SupportsExternalKeying() const { return State().supportsExternalKeying; }
+	bool KeyerInterfaceAvailable() const { return State().keyerInterfaceAvailable; }
+	bool ExternalKeyingActive() const { return State().externalKeyingActive; }
+	const std::string& StatusMessage() const { return State().statusMessage; }
+	double FrameBudgetMilliseconds() const { return State().frameBudgetMilliseconds; }
+	void SetStatusMessage(const std::string& message) { MutableState().statusMessage = message; }
+};
--- a/src/video/VideoPlayoutPolicy.h
+++ b/src/video/VideoPlayoutPolicy.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include <cstdint>
+
+enum class VideoUnderrunBehavior
+{
+	ReuseLastCompletedFrame,
+	BlackFrame
+};
+
+struct VideoPlayoutPolicy
+{
+	unsigned outputFramePoolSize = 10;
+	unsigned targetPrerollFrames = 4;
+	unsigned targetReadyFrames = 2;
+	unsigned maxReadyFrames = 4;
+	unsigned minimumSpareDeviceFrames = 1;
+	uint64_t lateOrDropCatchUpFrames = 0;
+	VideoUnderrunBehavior underrunBehavior = VideoUnderrunBehavior::ReuseLastCompletedFrame;
+	bool adaptiveHeadroomEnabled = false;
+};
+
+inline VideoPlayoutPolicy NormalizeVideoPlayoutPolicy(VideoPlayoutPolicy policy)
+{
+	if (policy.outputFramePoolSize == 0)
+		policy.outputFramePoolSize = 1;
+	if (policy.targetPrerollFrames == 0)
+		policy.targetPrerollFrames = 1;
+	if (policy.targetReadyFrames == 0)
+		policy.targetReadyFrames = 1;
+	if (policy.maxReadyFrames < policy.targetReadyFrames)
+		policy.maxReadyFrames = policy.targetReadyFrames;
+	const unsigned minimumOutputFramePoolSize = policy.targetPrerollFrames + policy.maxReadyFrames + policy.minimumSpareDeviceFrames;
+	if (policy.outputFramePoolSize < minimumOutputFramePoolSize)
+		policy.outputFramePoolSize = minimumOutputFramePoolSize;
+	return policy;
+}
--- a/src/video/VideoPlayoutScheduler.cpp
+++ b/src/video/VideoPlayoutScheduler.cpp
@@ -0,0 +1,108 @@
+#include "VideoPlayoutScheduler.h"
+
+void VideoPlayoutScheduler::Configure(int64_t frameDuration, int64_t timeScale)
+{
+	Configure(frameDuration, timeScale, VideoPlayoutPolicy());
+}
+
+void VideoPlayoutScheduler::Configure(int64_t frameDuration, int64_t timeScale, const VideoPlayoutPolicy& policy)
+{
+	mFrameDuration = frameDuration;
+	mTimeScale = timeScale;
+	mPolicy = NormalizeVideoPlayoutPolicy(policy);
+	Reset();
+}
+
+void VideoPlayoutScheduler::Reset()
+{
+	mScheduledFrameIndex = 0;
+	mCompletedFrameIndex = 0;
+	mLateStreak = 0;
+	mDropStreak = 0;
+}
+
+VideoIOScheduleTime VideoPlayoutScheduler::NextScheduleTime()
+{
+	VideoIOScheduleTime time;
+	time.streamTime = static_cast<int64_t>(mScheduledFrameIndex) * mFrameDuration;
+	time.duration = mFrameDuration;
+	time.timeScale = mTimeScale;
+	time.frameIndex = mScheduledFrameIndex;
+	++mScheduledFrameIndex;
+	return time;
+}
+
+void VideoPlayoutScheduler::AlignNextScheduleTimeToPlayback(int64_t streamTime, uint64_t leadFrames)
+{
+	if (mFrameDuration <= 0 || streamTime < 0)
+		return;
+
+	const uint64_t playbackFrameIndex = static_cast<uint64_t>(streamTime / mFrameDuration);
+	const uint64_t minimumScheduleIndex = playbackFrameIndex + leadFrames;
+	if (minimumScheduleIndex > mScheduledFrameIndex)
+		mScheduledFrameIndex = minimumScheduleIndex;
+}
+
+VideoPlayoutRecoveryDecision VideoPlayoutScheduler::AccountForCompletionResult(VideoIOCompletionResult result, uint64_t readyQueueDepth)
+{
+	++mCompletedFrameIndex;
+	if (result == VideoIOCompletionResult::DisplayedLate)
+		++mLateStreak;
+	else
+		mLateStreak = 0;
+	if (result == VideoIOCompletionResult::Dropped)
+		++mDropStreak;
+	else
+		mDropStreak = 0;
+
+	const uint64_t measuredLagFrames = MeasureLag(result, readyQueueDepth);
+	const uint64_t catchUpFrames = measuredLagFrames < mPolicy.lateOrDropCatchUpFrames
+		? measuredLagFrames
+		: mPolicy.lateOrDropCatchUpFrames;
+	if (catchUpFrames > 0)
+		mScheduledFrameIndex += catchUpFrames;
+
+	VideoPlayoutRecoveryDecision decision;
+	decision.result = result;
+	decision.completedFrameIndex = mCompletedFrameIndex;
+	decision.scheduledFrameIndex = mScheduledFrameIndex;
+	decision.readyQueueDepth = readyQueueDepth;
+	decision.scheduledLeadFrames = mScheduledFrameIndex > mCompletedFrameIndex
+		? mScheduledFrameIndex - mCompletedFrameIndex
+		: 0;
+	decision.measuredLagFrames = measuredLagFrames;
+	decision.catchUpFrames = catchUpFrames;
+	decision.lateStreak = mLateStreak;
+	decision.dropStreak = mDropStreak;
+	return decision;
+}
+
+double VideoPlayoutScheduler::FrameBudgetMilliseconds() const
+{
+	return mTimeScale != 0
+		? (static_cast<double>(mFrameDuration) * 1000.0) / static_cast<double>(mTimeScale)
+		: 0.0;
+}
+
+uint64_t VideoPlayoutScheduler::MeasureLag(VideoIOCompletionResult result, uint64_t readyQueueDepth) const
+{
+	if (result != VideoIOCompletionResult::DisplayedLate && result != VideoIOCompletionResult::Dropped)
+		return 0;
+
+	uint64_t lagFrames = 1;
+	if (result == VideoIOCompletionResult::DisplayedLate && mLateStreak > lagFrames)
+		lagFrames = mLateStreak;
+	if (result == VideoIOCompletionResult::Dropped && mDropStreak * 2 > lagFrames)
+		lagFrames = mDropStreak * 2;
+
+	if (mCompletedFrameIndex >= mScheduledFrameIndex)
+	{
+		const uint64_t scheduleLagFrames = mCompletedFrameIndex - mScheduledFrameIndex + 1;
+		if (scheduleLagFrames > lagFrames)
+			lagFrames = scheduleLagFrames;
+	}
+	if (readyQueueDepth < mPolicy.targetReadyFrames && mPolicy.targetReadyFrames - readyQueueDepth > lagFrames)
+		lagFrames = mPolicy.targetReadyFrames - readyQueueDepth;
+
+	return lagFrames;
+}
--- a/src/video/VideoPlayoutScheduler.h
+++ b/src/video/VideoPlayoutScheduler.h
@@ -0,0 +1,36 @@
+#pragma once
+
+#include "VideoIOTypes.h"
+#include "VideoPlayoutPolicy.h"
+
+#include <cstdint>
+
+class VideoPlayoutScheduler
+{
+public:
+	void Configure(int64_t frameDuration, int64_t timeScale);
+	void Configure(int64_t frameDuration, int64_t timeScale, const VideoPlayoutPolicy& policy);
+	void Reset();
+	VideoIOScheduleTime NextScheduleTime();
+	void AlignNextScheduleTimeToPlayback(int64_t streamTime, uint64_t leadFrames);
+	VideoPlayoutRecoveryDecision AccountForCompletionResult(VideoIOCompletionResult result, uint64_t readyQueueDepth = 0);
+	double FrameBudgetMilliseconds() const;
+	uint64_t ScheduledFrameIndex() const { return mScheduledFrameIndex; }
+	uint64_t CompletedFrameIndex() const { return mCompletedFrameIndex; }
+	int64_t FrameDuration() const { return mFrameDuration; }
+	uint64_t LateStreak() const { return mLateStreak; }
+	uint64_t DropStreak() const { return mDropStreak; }
+	int64_t TimeScale() const { return mTimeScale; }
+	const VideoPlayoutPolicy& Policy() const { return mPolicy; }
+
+private:
+	uint64_t MeasureLag(VideoIOCompletionResult result, uint64_t readyQueueDepth) const;
+
+	int64_t mFrameDuration = 0;
+	int64_t mTimeScale = 0;
+	uint64_t mScheduledFrameIndex = 0;
+	uint64_t mCompletedFrameIndex = 0;
+	uint64_t mLateStreak = 0;
+	uint64_t mDropStreak = 0;
+	VideoPlayoutPolicy mPolicy;
+};