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HDR: Update to use input/output color instead of OETF/EOTF.

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These terms are easier to understand, and make sense in the context of
MatrixTextureProcessor now that a MatrixTextureProcessor may have a
different input and output transfer.

PiperOrigin-RevId: 493265980
This commit is contained in:
huangdarwin 2022-12-06 12:18:42 +00:00 committed by Ian Baker
parent 00859a78fd
commit ac0d803027
4 changed files with 25 additions and 26 deletions
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11
libraries/effect/src/main/assets/shaders/fragment_shader_oetf_es3.glsl
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@ -17,9 +17,8 @@
// 1. Samples optical linear BT.2020 RGB from a (non-external) texture with // 1. Samples optical linear BT.2020 RGB from a (non-external) texture with
// uTexSampler. // uTexSampler.
// 2. Applies a 4x4 RGB color matrix to change the pixel colors. // 2. Applies a 4x4 RGB color matrix to change the pixel colors.
// 3. Applies the HLG or PQ OETF to yield electrical (HLG or PQ) BT.2020 RGB, // 3. Outputs electrical (HLG or PQ) BT.2020 RGB based on uOutputColorTransfer,
// based on uOetfColorTransfer. // via an OETF.
// 4. Copies this converted texture color to the current output.
// The output will be red if an error has occurred. // The output will be red if an error has occurred.
precision mediump float; precision mediump float;
@ -28,7 +27,7 @@ in vec2 vTexSamplingCoord;
out vec4 outColor; out vec4 outColor;
// C.java#ColorTransfer value. // C.java#ColorTransfer value.
// Only COLOR_TRANSFER_ST2084 and COLOR_TRANSFER_HLG are allowed. // Only COLOR_TRANSFER_ST2084 and COLOR_TRANSFER_HLG are allowed.
uniform int uOetfColorTransfer; uniform int uOutputColorTransfer;
uniform mat3 uColorTransform; uniform mat3 uColorTransform;
uniform mat4 uRgbMatrix; uniform mat4 uRgbMatrix;
@ -81,9 +80,9 @@ highp vec3 applyOetf(highp vec3 linearColor) {
// LINT.IfChange(color_transfer) // LINT.IfChange(color_transfer)
const int COLOR_TRANSFER_ST2084 = 6; const int COLOR_TRANSFER_ST2084 = 6;
const int COLOR_TRANSFER_HLG = 7; const int COLOR_TRANSFER_HLG = 7;
if (uOetfColorTransfer == COLOR_TRANSFER_ST2084) { if (uOutputColorTransfer == COLOR_TRANSFER_ST2084) {
return pqOetf(linearColor); return pqOetf(linearColor);
} else if (uOetfColorTransfer == COLOR_TRANSFER_HLG) { } else if (uOutputColorTransfer == COLOR_TRANSFER_HLG) {
return hlgOetf(linearColor); return hlgOetf(linearColor);
} else { } else {
// Output red as an obviously visible error. // Output red as an obviously visible error.

20
libraries/effect/src/main/assets/shaders/fragment_shader_transformation_external_yuv_es3.glsl
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@ -20,11 +20,11 @@
// https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_YUV_target.txt, // https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_YUV_target.txt,
// 2. Applies a YUV to RGB conversion using the specified color transform // 2. Applies a YUV to RGB conversion using the specified color transform
// uYuvToRgbColorTransform, yielding electrical (HLG or PQ) BT.2020 RGB, // uYuvToRgbColorTransform, yielding electrical (HLG or PQ) BT.2020 RGB,
// 3. Applies an EOTF based on uEotfColorTransfer, yielding optical linear // 3. Applies an EOTF based on uInputColorTransfer, yielding optical linear
// BT.2020 RGB. // BT.2020 RGB.
// 4. Applies a 4x4 RGB color matrix to change the pixel colors. // 4. Applies a 4x4 RGB color matrix to change the pixel colors.
// 5. Output as requested by uOetfColorTransfer. Use COLOR_TRANSFER_LINEAR for // 5. Outputs as requested by uOutputColorTransfer. Use COLOR_TRANSFER_LINEAR
// outputting to intermediate shaders, or COLOR_TRANSFER_ST2084 / // for outputting to intermediate shaders, or COLOR_TRANSFER_ST2084 /
// COLOR_TRANSFER_HLG to output electrical colors via an OETF (e.g. to an // COLOR_TRANSFER_HLG to output electrical colors via an OETF (e.g. to an
// encoder). // encoder).
// The output will be red if an error has occurred. // The output will be red if an error has occurred.
@ -37,11 +37,11 @@ uniform mat3 uYuvToRgbColorTransform;
uniform mat4 uRgbMatrix; uniform mat4 uRgbMatrix;
// C.java#ColorTransfer value. // C.java#ColorTransfer value.
// Only COLOR_TRANSFER_ST2084 and COLOR_TRANSFER_HLG are allowed. // Only COLOR_TRANSFER_ST2084 and COLOR_TRANSFER_HLG are allowed.
uniform int uEotfColorTransfer; uniform int uInputColorTransfer;
// C.java#ColorTransfer value. // C.java#ColorTransfer value.
// Only COLOR_TRANSFER_LINEAR, COLOR_TRANSFER_ST2084, and COLOR_TRANSFER_HLG are // Only COLOR_TRANSFER_LINEAR, COLOR_TRANSFER_ST2084, and COLOR_TRANSFER_HLG are
// allowed. // allowed.
uniform int uOetfColorTransfer; uniform int uOutputColorTransfer;
in vec2 vTexSamplingCoord; in vec2 vTexSamplingCoord;
out vec4 outColor; out vec4 outColor;
@ -94,9 +94,9 @@ highp vec3 applyEotf(highp vec3 electricalColor) {
const int COLOR_TRANSFER_ST2084 = 6; const int COLOR_TRANSFER_ST2084 = 6;
const int COLOR_TRANSFER_HLG = 7; const int COLOR_TRANSFER_HLG = 7;
if (uEotfColorTransfer == COLOR_TRANSFER_ST2084) { if (uInputColorTransfer == COLOR_TRANSFER_ST2084) {
return pqEotf(electricalColor); return pqEotf(electricalColor);
} else if (uEotfColorTransfer == COLOR_TRANSFER_HLG) { } else if (uInputColorTransfer == COLOR_TRANSFER_HLG) {
return hlgEotf(electricalColor); return hlgEotf(electricalColor);
} else { } else {
// Output red as an obviously visible error. // Output red as an obviously visible error.
@ -151,11 +151,11 @@ highp vec3 applyOetf(highp vec3 linearColor) {
const int COLOR_TRANSFER_LINEAR = 1; const int COLOR_TRANSFER_LINEAR = 1;
const int COLOR_TRANSFER_ST2084 = 6; const int COLOR_TRANSFER_ST2084 = 6;
const int COLOR_TRANSFER_HLG = 7; const int COLOR_TRANSFER_HLG = 7;
if(uOetfColorTransfer == COLOR_TRANSFER_ST2084) { if (uOutputColorTransfer == COLOR_TRANSFER_ST2084) {
return pqOetf(linearColor); return pqOetf(linearColor);
} else if(uOetfColorTransfer == COLOR_TRANSFER_HLG) { } else if (uOutputColorTransfer == COLOR_TRANSFER_HLG) {
return hlgOetf(linearColor); return hlgOetf(linearColor);
} else if (uOetfColorTransfer == COLOR_TRANSFER_LINEAR) { } else if (uOutputColorTransfer == COLOR_TRANSFER_LINEAR) {
return linearColor; return linearColor;
} else { } else {
// Output red as an obviously visible error. // Output red as an obviously visible error.

12
libraries/effect/src/main/assets/shaders/fragment_shader_transformation_sdr_external_es2.glsl
View File

@ -20,9 +20,9 @@
// 2. Transforms the electrical colors to optical colors using the SMPTE 170M // 2. Transforms the electrical colors to optical colors using the SMPTE 170M
// EOTF. // EOTF.
// 3. Applies a 4x4 RGB color matrix to change the pixel colors. // 3. Applies a 4x4 RGB color matrix to change the pixel colors.
// 4. Output as requested by uOetfColorTransfer. Use COLOR_TRANSFER_LINEAR for // 4. Outputs as requested by uOutputColorTransfer. Use COLOR_TRANSFER_LINEAR
// outputting to intermediate shaders, or COLOR_TRANSFER_SDR_VIDEO to output // for outputting to intermediate shaders, or COLOR_TRANSFER_SDR_VIDEO to
// electrical colors via an OETF (e.g. to an encoder). // output electrical colors via an OETF (e.g. to an encoder).
#extension GL_OES_EGL_image_external : require #extension GL_OES_EGL_image_external : require
precision mediump float; precision mediump float;
@ -31,7 +31,7 @@ uniform mat4 uRgbMatrix;
varying vec2 vTexSamplingCoord; varying vec2 vTexSamplingCoord;
// C.java#ColorTransfer value. // C.java#ColorTransfer value.
// Only COLOR_TRANSFER_LINEAR and COLOR_TRANSFER_SDR_VIDEO are allowed. // Only COLOR_TRANSFER_LINEAR and COLOR_TRANSFER_SDR_VIDEO are allowed.
uniform int uOetfColorTransfer; uniform int uOutputColorTransfer;
const float inverseGamma = 0.4500; const float inverseGamma = 0.4500;
const float gamma = 1.0 / inverseGamma; const float gamma = 1.0 / inverseGamma;
@ -76,9 +76,9 @@ highp vec3 applyOetf(highp vec3 linearColor) {
// LINT.IfChange(color_transfer_oetf) // LINT.IfChange(color_transfer_oetf)
const int COLOR_TRANSFER_LINEAR = 1; const int COLOR_TRANSFER_LINEAR = 1;
const int COLOR_TRANSFER_SDR_VIDEO = 3; const int COLOR_TRANSFER_SDR_VIDEO = 3;
if (uOetfColorTransfer == COLOR_TRANSFER_LINEAR) { if (uOutputColorTransfer == COLOR_TRANSFER_LINEAR) {
return linearColor; return linearColor;
} else if(uOetfColorTransfer == COLOR_TRANSFER_SDR_VIDEO) { } else if (uOutputColorTransfer == COLOR_TRANSFER_SDR_VIDEO) {
return sdrOetf(linearColor); return sdrOetf(linearColor);
} else { } else {
// Output red as an obviously visible error. // Output red as an obviously visible error.

8
libraries/effect/src/main/java/androidx/media3/effect/MatrixTextureProcessor.java
View File

@ -226,12 +226,12 @@ import java.util.List;
checkArgument( checkArgument(
inputColorTransfer == C.COLOR_TRANSFER_HLG inputColorTransfer == C.COLOR_TRANSFER_HLG
|| inputColorTransfer == C.COLOR_TRANSFER_ST2084); || inputColorTransfer == C.COLOR_TRANSFER_ST2084);
glProgram.setIntUniform("uEotfColorTransfer", inputColorTransfer); glProgram.setIntUniform("uInputColorTransfer", inputColorTransfer);
checkArgument( checkArgument(
outputColorTransfer == C.COLOR_TRANSFER_HLG outputColorTransfer == C.COLOR_TRANSFER_HLG
|| outputColorTransfer == C.COLOR_TRANSFER_ST2084 || outputColorTransfer == C.COLOR_TRANSFER_ST2084
|| outputColorTransfer == C.COLOR_TRANSFER_LINEAR); || outputColorTransfer == C.COLOR_TRANSFER_LINEAR);
glProgram.setIntUniform("uOetfColorTransfer", outputColorTransfer); glProgram.setIntUniform("uOutputColorTransfer", outputColorTransfer);
} else { } else {
checkArgument( checkArgument(
outputColorInfo.colorSpace != C.COLOR_SPACE_BT2020, outputColorInfo.colorSpace != C.COLOR_SPACE_BT2020,
@ -243,7 +243,7 @@ import java.util.List;
outputColorTransfer == C.COLOR_TRANSFER_SDR outputColorTransfer == C.COLOR_TRANSFER_SDR
|| outputColorTransfer == C.COLOR_TRANSFER_LINEAR); || outputColorTransfer == C.COLOR_TRANSFER_LINEAR);
// The SDR shader automatically applies an COLOR_TRANSFER_SDR EOTF. // The SDR shader automatically applies an COLOR_TRANSFER_SDR EOTF.
glProgram.setIntUniform("uOetfColorTransfer", outputColorTransfer); glProgram.setIntUniform("uOutputColorTransfer", outputColorTransfer);
} }
return new MatrixTextureProcessor( return new MatrixTextureProcessor(
@ -291,7 +291,7 @@ import java.util.List;
@C.ColorTransfer int colorTransfer = outputColorInfo.colorTransfer; @C.ColorTransfer int colorTransfer = outputColorInfo.colorTransfer;
checkArgument( checkArgument(
colorTransfer == C.COLOR_TRANSFER_HLG || colorTransfer == C.COLOR_TRANSFER_ST2084); colorTransfer == C.COLOR_TRANSFER_HLG || colorTransfer == C.COLOR_TRANSFER_ST2084);
glProgram.setIntUniform("uOetfColorTransfer", colorTransfer); glProgram.setIntUniform("uOutputColorTransfer", colorTransfer);
} }
return new MatrixTextureProcessor( return new MatrixTextureProcessor(