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Commit fe51d01a by tofunmi Committed by Tofunmi Adigun-Hameed
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HDR texture asset loading 

PiperOrigin-RevId: 532846248
(cherry picked from commit 43638cd2940afa67b5a3e39879f5fe65c36f59df)
parent 1edec287
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Showing with 265 additions and 29 deletions
library/effect/src/main/assets/shaders/fragment_shader_transformation_external_yuv_es3.glsl
...@@ -29,7 +29,7 @@ ...@@ -29,7 +29,7 @@
// for 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 or blue if an error has occurred.
#extension GL_OES_EGL_image_external : require #extension GL_OES_EGL_image_external : require
#extension GL_EXT_YUV_target : require #extension GL_EXT_YUV_target : require
......
library/effect/src/main/assets/shaders/fragment_shader_transformation_hdr_internal_es3.glsl 0 → 100644
#version 300 es
// Copyright 2022 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ES 3 fragment shader that:
// 1. Samples electrical (HLG or PQ) BT.2020 RGB from an internal texture.
// 2. Applies an EOTF based on uInputColorTransfer, yielding optical linear
// BT.2020 RGB.
// 3. Optionally applies a BT2020 to BT709 OOTF, if OpenGL tone-mapping is
// requested via uApplyHdrToSdrToneMapping.
// 4. Applies a 4x4 RGB color matrix to change the pixel colors.
// 5. Outputs as requested by uOutputColorTransfer. Use COLOR_TRANSFER_LINEAR
// for outputting to intermediate shaders, or COLOR_TRANSFER_ST2084 /
// COLOR_TRANSFER_HLG to output electrical colors via an OETF (e.g. to an
// encoder).
// The output will be red or blue if an error has occurred.
precision mediump float;
uniform sampler2D uTexSampler;
uniform mat4 uRgbMatrix;
// C.java#ColorTransfer value.
// Only COLOR_TRANSFER_ST2084 and COLOR_TRANSFER_HLG are allowed.
uniform int uInputColorTransfer;
uniform int uApplyHdrToSdrToneMapping;
// C.java#ColorTransfer value.
// Only COLOR_TRANSFER_LINEAR, COLOR_TRANSFER_GAMMA_2_2, COLOR_TRANSFER_ST2084,
// and COLOR_TRANSFER_HLG are allowed.
uniform int uOutputColorTransfer;
in vec2 vTexSamplingCoord;
out vec4 outColor;
// LINT.IfChange(color_transfer)
const int COLOR_TRANSFER_LINEAR = 1;
const int COLOR_TRANSFER_GAMMA_2_2 = 10;
const int COLOR_TRANSFER_ST2084 = 6;
const int COLOR_TRANSFER_HLG = 7;
// TODO(b/227624622): Consider using mediump to save precision, if it won't lead
// to noticeable quantization errors.
// BT.2100 / BT.2020 HLG EOTF for one channel.
highp float hlgEotfSingleChannel(highp float hlgChannel) {
// Specification:
// https://www.khronos.org/registry/DataFormat/specs/1.3/dataformat.1.3.inline.html#TRANSFER_HLG
// Reference implementation:
// https://cs.android.com/android/platform/superproject/+/master:frameworks/native/libs/renderengine/gl/ProgramCache.cpp;l=265-279;drc=de09f10aa504fd8066370591a00c9ff1cafbb7fa
const highp float a = 0.17883277;
const highp float b = 0.28466892;
const highp float c = 0.55991073;
return hlgChannel <= 0.5 ? hlgChannel * hlgChannel / 3.0 :
(b + exp((hlgChannel - c) / a)) / 12.0;
}
// BT.2100 / BT.2020 HLG EOTF.
highp vec3 hlgEotf(highp vec3 hlgColor) {
return vec3(
hlgEotfSingleChannel(hlgColor.r),
hlgEotfSingleChannel(hlgColor.g),
hlgEotfSingleChannel(hlgColor.b)
);
}
// BT.2100 / BT.2020 PQ EOTF.
highp vec3 pqEotf(highp vec3 pqColor) {
// Specification:
// https://registry.khronos.org/DataFormat/specs/1.3/dataformat.1.3.inline.html#TRANSFER_PQ
// Reference implementation:
// https://cs.android.com/android/platform/superproject/+/master:frameworks/native/libs/renderengine/gl/ProgramCache.cpp;l=250-263;drc=de09f10aa504fd8066370591a00c9ff1cafbb7fa
const highp float m1 = (2610.0 / 16384.0);
const highp float m2 = (2523.0 / 4096.0) * 128.0;
const highp float c1 = (3424.0 / 4096.0);
const highp float c2 = (2413.0 / 4096.0) * 32.0;
const highp float c3 = (2392.0 / 4096.0) * 32.0;
highp vec3 temp = pow(clamp(pqColor, 0.0, 1.0), 1.0 / vec3(m2));
temp = max(temp - c1, 0.0) / (c2 - c3 * temp);
return pow(temp, 1.0 / vec3(m1));
}
// Applies the appropriate EOTF to convert nonlinear electrical values to linear
// optical values. Input and output are both normalized to [0, 1].
highp vec3 applyEotf(highp vec3 electricalColor) {
if (uInputColorTransfer == COLOR_TRANSFER_ST2084) {
return pqEotf(electricalColor);
} else if (uInputColorTransfer == COLOR_TRANSFER_HLG) {
return hlgEotf(electricalColor);
} else {
// Output red as an obviously visible error.
return vec3(1.0, 0.0, 0.0);
}
}
// Apply the HLG BT2020 to BT709 OOTF.
highp vec3 applyHlgBt2020ToBt709Ootf(highp vec3 linearRgbBt2020) {
// Reference ("HLG Reference OOTF" section):
// https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.2100-2-201807-I!!PDF-E.pdf
// Matrix values based on computeXYZMatrix(BT2020Primaries, BT2020WhitePoint)
// https://cs.android.com/android/platform/superproject/+/master:frameworks/base/libs/hwui/utils/HostColorSpace.cpp;l=200-232;drc=86bd214059cd6150304888a285941bf74af5b687
const mat3 RGB_TO_XYZ_BT2020 = mat3(
0.63695805f, 0.26270021f, 0.00000000f,
0.14461690f, 0.67799807f, 0.02807269f,
0.16888098f, 0.05930172f, 1.06098506f);
// Matrix values based on computeXYZMatrix(BT709Primaries, BT709WhitePoint)
const mat3 XYZ_TO_RGB_BT709 = mat3(
3.24096994f, -0.96924364f, 0.05563008f,
-1.53738318f, 1.87596750f, -0.20397696f,
-0.49861076f, 0.04155506f, 1.05697151f);
// hlgGamma is 1.2 + 0.42 * log10(nominalPeakLuminance/1000);
// nominalPeakLuminance was selected to use a 500 as a typical value, used
// in https://cs.android.com/android/platform/superproject/+/master:frameworks/native/libs/tonemap/tonemap.cpp;drc=7a577450e536aa1e99f229a0cb3d3531c82e8a8d;l=62,
// b/199162498#comment35, and
// https://www.microsoft.com/applied-sciences/uploads/projects/investigation-of-hdr-vs-tone-mapped-sdr/investigation-of-hdr-vs-tone-mapped-sdr.pdf.
const float hlgGamma = 1.0735674018211279;
vec3 linearXyzBt2020 = RGB_TO_XYZ_BT2020 * linearRgbBt2020;
vec3 linearXyzBt709 =
linearXyzBt2020 * pow(linearXyzBt2020[1], hlgGamma - 1.0);
vec3 linearRgbBt709 = clamp((XYZ_TO_RGB_BT709 * linearXyzBt709), 0.0, 1.0);
return linearRgbBt709;
}
// Apply the PQ BT2020 to BT709 OOTF.
highp vec3 applyPqBt2020ToBt709Ootf(highp vec3 linearRgbBt2020) {
float pqPeakLuminance = 10000.0;
float sdrPeakLuminance = 500.0;
return linearRgbBt2020 * pqPeakLuminance / sdrPeakLuminance;
}
highp vec3 applyBt2020ToBt709Ootf(highp vec3 linearRgbBt2020) {
if (uInputColorTransfer == COLOR_TRANSFER_ST2084) {
return applyPqBt2020ToBt709Ootf(linearRgbBt2020);
} else if (uInputColorTransfer == COLOR_TRANSFER_HLG) {
return applyHlgBt2020ToBt709Ootf(linearRgbBt2020);
} else {
// Output green as an obviously visible error.
return vec3(0.0, 1.0, 0.0);
}
}
// BT.2100 / BT.2020 HLG OETF for one channel.
highp float hlgOetfSingleChannel(highp float linearChannel) {
// Specification:
// https://www.khronos.org/registry/DataFormat/specs/1.3/dataformat.1.3.inline.html#TRANSFER_HLG
// Reference implementation:
// https://cs.android.com/android/platform/superproject/+/master:frameworks/native/libs/renderengine/gl/ProgramCache.cpp;l=529-543;drc=de09f10aa504fd8066370591a00c9ff1cafbb7fa
const highp float a = 0.17883277;
const highp float b = 0.28466892;
const highp float c = 0.55991073;
return linearChannel <= 1.0 / 12.0 ? sqrt(3.0 * linearChannel) :
a * log(12.0 * linearChannel - b) + c;
}
// BT.2100 / BT.2020 HLG OETF.
highp vec3 hlgOetf(highp vec3 linearColor) {
return vec3(
hlgOetfSingleChannel(linearColor.r),
hlgOetfSingleChannel(linearColor.g),
hlgOetfSingleChannel(linearColor.b)
);
}
// BT.2100 / BT.2020, PQ / ST2084 OETF.
highp vec3 pqOetf(highp vec3 linearColor) {
// Specification:
// https://registry.khronos.org/DataFormat/specs/1.3/dataformat.1.3.inline.html#TRANSFER_PQ
// Reference implementation:
// https://cs.android.com/android/platform/superproject/+/master:frameworks/native/libs/renderengine/gl/ProgramCache.cpp;l=514-527;drc=de09f10aa504fd8066370591a00c9ff1cafbb7fa
const highp float m1 = (2610.0 / 16384.0);
const highp float m2 = (2523.0 / 4096.0) * 128.0;
const highp float c1 = (3424.0 / 4096.0);
const highp float c2 = (2413.0 / 4096.0) * 32.0;
const highp float c3 = (2392.0 / 4096.0) * 32.0;
highp vec3 temp = pow(linearColor, vec3(m1));
temp = (c1 + c2 * temp) / (1.0 + c3 * temp);
return pow(temp, vec3(m2));
}
// BT.709 gamma 2.2 OETF for one channel.
float gamma22OetfSingleChannel(highp float linearChannel) {
// Reference:
// https://developer.android.com/reference/android/hardware/DataSpace#TRANSFER_GAMMA2_2
return pow(linearChannel, (1.0 / 2.2));
}
// BT.709 gamma 2.2 OETF.
vec3 gamma22Oetf(highp vec3 linearColor) {
return vec3(
gamma22OetfSingleChannel(linearColor.r),
gamma22OetfSingleChannel(linearColor.g),
gamma22OetfSingleChannel(linearColor.b));
}
// Applies the appropriate OETF to convert linear optical signals to nonlinear
// electrical signals. Input and output are both normalized to [0, 1].
highp vec3 applyOetf(highp vec3 linearColor) {
if (uOutputColorTransfer == COLOR_TRANSFER_ST2084) {
return pqOetf(linearColor);
} else if (uOutputColorTransfer == COLOR_TRANSFER_HLG) {
return hlgOetf(linearColor);
} else if (uOutputColorTransfer == COLOR_TRANSFER_GAMMA_2_2) {
return gamma22Oetf(linearColor);
} else if (uOutputColorTransfer == COLOR_TRANSFER_LINEAR) {
return linearColor;
} else {
// Output blue as an obviously visible error.
return vec3(0.0, 0.0, 1.0);
}
}
void main() {
vec3 opticalColorBt2020 = applyEotf(
texture(uTexSampler, vTexSamplingCoord).xyz);
vec4 opticalColor = (uApplyHdrToSdrToneMapping == 1)
? vec4(applyBt2020ToBt709Ootf(opticalColorBt2020), 1.0)
: vec4(opticalColorBt2020, 1.0);
vec4 transformedColors = uRgbMatrix * opticalColor;
outColor = vec4(applyOetf(transformedColors.rgb), 1.0);
}
library/effect/src/main/java/com/google/android/exoplayer2/effect/DefaultShaderProgram.java
...@@ -69,6 +69,8 @@ import java.util.List; ...@@ -69,6 +69,8 @@ import java.util.List;
"shaders/fragment_shader_transformation_external_yuv_es3.glsl"; "shaders/fragment_shader_transformation_external_yuv_es3.glsl";
private static final String FRAGMENT_SHADER_TRANSFORMATION_SDR_EXTERNAL_PATH = private static final String FRAGMENT_SHADER_TRANSFORMATION_SDR_EXTERNAL_PATH =
"shaders/fragment_shader_transformation_sdr_external_es2.glsl"; "shaders/fragment_shader_transformation_sdr_external_es2.glsl";
private static final String FRAGMENT_SHADER_TRANSFORMATION_HDR_INTERNAL_ES3_PATH =
"shaders/fragment_shader_transformation_hdr_internal_es3.glsl";
private static final String FRAGMENT_SHADER_TRANSFORMATION_SDR_INTERNAL_PATH = private static final String FRAGMENT_SHADER_TRANSFORMATION_SDR_INTERNAL_PATH =
"shaders/fragment_shader_transformation_sdr_internal_es2.glsl"; "shaders/fragment_shader_transformation_sdr_internal_es2.glsl";
private static final ImmutableList<float[]> NDC_SQUARE = private static final ImmutableList<float[]> NDC_SQUARE =
...@@ -203,15 +205,17 @@ import java.util.List; ...@@ -203,15 +205,17 @@ import java.util.List;
@InputType int inputType) @InputType int inputType)
throws VideoFrameProcessingException { throws VideoFrameProcessingException {
checkState( checkState(
!ColorInfo.isTransferHdr(inputColorInfo),
"DefaultShaderProgram doesn't support HDR internal sampler input yet.");
checkState(
inputColorInfo.colorTransfer != C.COLOR_TRANSFER_SRGB || inputType == INPUT_TYPE_BITMAP); inputColorInfo.colorTransfer != C.COLOR_TRANSFER_SRGB || inputType == INPUT_TYPE_BITMAP);
GlProgram glProgram = boolean isInputTransferHdr = ColorInfo.isTransferHdr(inputColorInfo);
createGlProgram( String vertexShaderFilePath =
context, isInputTransferHdr
VERTEX_SHADER_TRANSFORMATION_PATH, ? VERTEX_SHADER_TRANSFORMATION_ES3_PATH
FRAGMENT_SHADER_TRANSFORMATION_SDR_INTERNAL_PATH); : VERTEX_SHADER_TRANSFORMATION_PATH;
String fragmentShaderFilePath =
isInputTransferHdr
? FRAGMENT_SHADER_TRANSFORMATION_HDR_INTERNAL_ES3_PATH
: FRAGMENT_SHADER_TRANSFORMATION_SDR_INTERNAL_PATH;
GlProgram glProgram = createGlProgram(context, vertexShaderFilePath, fragmentShaderFilePath);
glProgram.setIntUniform("uInputColorTransfer", inputColorInfo.colorTransfer); glProgram.setIntUniform("uInputColorTransfer", inputColorInfo.colorTransfer);
return createWithSampler( return createWithSampler(
glProgram, glProgram,
...@@ -266,8 +270,23 @@ import java.util.List; ...@@ -266,8 +270,23 @@ import java.util.List;
isInputTransferHdr isInputTransferHdr
? FRAGMENT_SHADER_TRANSFORMATION_EXTERNAL_YUV_ES3_PATH ? FRAGMENT_SHADER_TRANSFORMATION_EXTERNAL_YUV_ES3_PATH
: FRAGMENT_SHADER_TRANSFORMATION_SDR_EXTERNAL_PATH; : FRAGMENT_SHADER_TRANSFORMATION_SDR_EXTERNAL_PATH;
GlProgram glProgram = createGlProgram(context, vertexShaderFilePath, fragmentShaderFilePath);
if (isInputTransferHdr) {
// In HDR editing mode the decoder output is sampled in YUV.
if (!GlUtil.isYuvTargetExtensionSupported()) {
throw new VideoFrameProcessingException(
"The EXT_YUV_target extension is required for HDR editing input.");
}
glProgram.setFloatsUniform(
"uYuvToRgbColorTransform",
inputColorInfo.colorRange == C.COLOR_RANGE_FULL
? BT2020_FULL_RANGE_YUV_TO_RGB_COLOR_TRANSFORM_MATRIX
: BT2020_LIMITED_RANGE_YUV_TO_RGB_COLOR_TRANSFORM_MATRIX);
glProgram.setIntUniform("uInputColorTransfer", inputColorInfo.colorTransfer);
}
return createWithSampler( return createWithSampler(
createGlProgram(context, vertexShaderFilePath, fragmentShaderFilePath), glProgram,
matrixTransformations, matrixTransformations,
rgbMatrices, rgbMatrices,
inputColorInfo, inputColorInfo,
...@@ -341,31 +360,16 @@ import java.util.List; ...@@ -341,31 +360,16 @@ import java.util.List;
List<RgbMatrix> rgbMatrices, List<RgbMatrix> rgbMatrices,
ColorInfo inputColorInfo, ColorInfo inputColorInfo,
ColorInfo outputColorInfo, ColorInfo outputColorInfo,
boolean enableColorTransfers) boolean enableColorTransfers) {
throws VideoFrameProcessingException {
boolean isInputTransferHdr = ColorInfo.isTransferHdr(inputColorInfo); boolean isInputTransferHdr = ColorInfo.isTransferHdr(inputColorInfo);
@C.ColorTransfer int outputColorTransfer = outputColorInfo.colorTransfer; @C.ColorTransfer int outputColorTransfer = outputColorInfo.colorTransfer;
if (isInputTransferHdr) { if (isInputTransferHdr) {
checkArgument(inputColorInfo.colorSpace == C.COLOR_SPACE_BT2020); checkArgument(inputColorInfo.colorSpace == C.COLOR_SPACE_BT2020);
checkArgument(enableColorTransfers); checkArgument(enableColorTransfers);
// In HDR editing mode the decoder output is sampled in YUV.
if (!GlUtil.isYuvTargetExtensionSupported()) {
throw new VideoFrameProcessingException(
"The EXT_YUV_target extension is required for HDR editing input.");
}
glProgram.setFloatsUniform(
"uYuvToRgbColorTransform",
inputColorInfo.colorRange == C.COLOR_RANGE_FULL
? BT2020_FULL_RANGE_YUV_TO_RGB_COLOR_TRANSFORM_MATRIX
: BT2020_LIMITED_RANGE_YUV_TO_RGB_COLOR_TRANSFORM_MATRIX);
checkArgument(ColorInfo.isTransferHdr(inputColorInfo));
glProgram.setIntUniform("uInputColorTransfer", inputColorInfo.colorTransfer);
// TODO(b/239735341): Add a setBooleanUniform method to GlProgram. // TODO(b/239735341): Add a setBooleanUniform method to GlProgram.
glProgram.setIntUniform( glProgram.setIntUniform(
"uApplyHdrToSdrToneMapping", "uApplyHdrToSdrToneMapping",
/* value= */ (outputColorInfo.colorSpace != C.COLOR_SPACE_BT2020) ? 1 : 0); /* value= */ (outputColorInfo.colorSpace != C.COLOR_SPACE_BT2020) ? GL_TRUE : GL_FALSE);
checkArgument( checkArgument(
outputColorTransfer != Format.NO_VALUE && outputColorTransfer != C.COLOR_TRANSFER_SDR); outputColorTransfer != Format.NO_VALUE && outputColorTransfer != C.COLOR_TRANSFER_SDR);
glProgram.setIntUniform("uOutputColorTransfer", outputColorTransfer); glProgram.setIntUniform("uOutputColorTransfer", outputColorTransfer);
......
library/effect/src/main/java/com/google/android/exoplayer2/effect/DefaultVideoFrameProcessor.java
...@@ -618,13 +618,13 @@ public final class DefaultVideoFrameProcessor implements VideoFrameProcessor { ...@@ -618,13 +618,13 @@ public final class DefaultVideoFrameProcessor implements VideoFrameProcessor {
inputSwitcher.registerInput(INPUT_TYPE_SURFACE); inputSwitcher.registerInput(INPUT_TYPE_SURFACE);
if (!ColorInfo.isTransferHdr(inputColorInfo)) { if (!ColorInfo.isTransferHdr(inputColorInfo)) {
// HDR bitmap or texture input is not supported. // HDR bitmap input is not supported.
inputSwitcher.registerInput(INPUT_TYPE_BITMAP); inputSwitcher.registerInput(INPUT_TYPE_BITMAP);
}
if (inputColorInfo.colorTransfer != C.COLOR_TRANSFER_SRGB) { if (inputColorInfo.colorTransfer != C.COLOR_TRANSFER_SRGB) {
// Image and textureId concatenation not supported. // Image and textureId concatenation not supported.
inputSwitcher.registerInput(INPUT_TYPE_TEXTURE_ID); inputSwitcher.registerInput(INPUT_TYPE_TEXTURE_ID);
} }
}
inputSwitcher.setDownstreamShaderProgram(effectsShaderPrograms.get(0)); inputSwitcher.setDownstreamShaderProgram(effectsShaderPrograms.get(0));
setGlObjectProviderOnShaderPrograms(effectsShaderPrograms, glObjectsProvider); setGlObjectProviderOnShaderPrograms(effectsShaderPrograms, glObjectsProvider);
......
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