Initial audio support

runtime/templates/shader_wrapper.slang.in

@@ -16,6 +16,11 @@ struct ShaderContext
 	float bypass;
 	int sourceHistoryLength;
 	int temporalHistoryLength;
+	float2 audioRms;
+	float2 audioPeak;
+	float audioMonoRms;
+	float audioMonoPeak;
+	float4 audioBands;
 };
 
 cbuffer GlobalParams
@@ -28,15 +33,31 @@ cbuffer GlobalParams
 	float gBypass;
 	int gSourceHistoryLength;
 	int gTemporalHistoryLength;
+	float2 gAudioRms;
+	float2 gAudioPeak;
+	float gAudioMonoRms;
+	float gAudioMonoPeak;
+	float4 gAudioBands;
 {{PARAMETER_UNIFORMS}}};
 
 Sampler2D<float4> gVideoInput;
+Sampler2D<float4> gAudioData;
 {{SOURCE_HISTORY_SAMPLERS}}{{TEMPORAL_HISTORY_SAMPLERS}}{{TEXTURE_SAMPLERS}}
 float4 sampleVideo(float2 tc)
 {
 	return gVideoInput.Sample(tc);
 }
 
+float4 sampleAudioWaveform(float x)
+{
+	return gAudioData.Sample(float2(saturate(x), 0.25));
+}
+
+float4 sampleAudioSpectrum(float x)
+{
+	return gAudioData.Sample(float2(saturate(x), 0.75));
+}
+
 float4 sampleSourceHistory(int framesAgo, float2 tc)
 {
 	if (gSourceHistoryLength <= 0)
@@ -83,6 +104,11 @@ float4 fragmentMain(FragmentInput input) : SV_Target
 	context.bypass = gBypass;
 	context.sourceHistoryLength = gSourceHistoryLength;
 	context.temporalHistoryLength = gTemporalHistoryLength;
+	context.audioRms = gAudioRms;
+	context.audioPeak = gAudioPeak;
+	context.audioMonoRms = gAudioMonoRms;
+	context.audioMonoPeak = gAudioMonoPeak;
+	context.audioBands = gAudioBands;
 	float4 effectedColor = {{ENTRY_POINT_CALL}};
 	float mixValue = clamp(gBypass > 0.5 ? 0.0 : gMixAmount, 0.0, 1.0);
 	return lerp(context.sourceColor, effectedColor, mixValue);