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This will allow incoming NV12 frames to be encodable by libvpx without requiring a conversion to I420 before encoding. NV12 is supported in libvpx https://chromium.googlesource.com/webm/libvpx/+/master/CHANGELOG Bug: webrtc:11916 Change-Id: I30e9c42c0607bee07691930c0248921bba09134c Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/183720 Reviewed-by: Niels Moller <nisse@webrtc.org> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Commit-Queue: Evan Shrubsole <eshr@google.com> Cr-Commit-Position: refs/heads/master@{#32061}
119 lines
3.9 KiB
C++
119 lines
3.9 KiB
C++
/*
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* Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "api/video/nv12_buffer.h"
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#include "api/video/i420_buffer.h"
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#include "test/frame_utils.h"
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#include "test/gmock.h"
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#include "test/gtest.h"
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namespace webrtc {
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namespace {
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int GetY(rtc::scoped_refptr<NV12BufferInterface> buf, int col, int row) {
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return buf->DataY()[row * buf->StrideY() + col];
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}
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int GetU(rtc::scoped_refptr<NV12BufferInterface> buf, int col, int row) {
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return buf->DataUV()[(row / 2) * buf->StrideUV() + (col / 2) * 2];
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}
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int GetV(rtc::scoped_refptr<NV12BufferInterface> buf, int col, int row) {
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return buf->DataUV()[(row / 2) * buf->StrideUV() + (col / 2) * 2 + 1];
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}
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void FillNV12Buffer(rtc::scoped_refptr<NV12Buffer> buf) {
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const uint8_t Y = 1;
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const uint8_t U = 2;
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const uint8_t V = 3;
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for (int row = 0; row < buf->height(); ++row) {
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for (int col = 0; col < buf->width(); ++col) {
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buf->MutableDataY()[row * buf->StrideY() + col] = Y;
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}
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}
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// Fill interleaving UV values.
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for (int row = 0; row < buf->ChromaHeight(); row++) {
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for (int col = 0; col < buf->StrideUV(); col += 2) {
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int uv_index = row * buf->StrideUV() + col;
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buf->MutableDataUV()[uv_index] = U;
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buf->MutableDataUV()[uv_index + 1] = V;
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}
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}
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}
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} // namespace
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TEST(NV12BufferTest, InitialData) {
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constexpr int stride_y = 3;
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constexpr int stride_uv = 4;
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constexpr int width = 3;
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constexpr int height = 3;
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rtc::scoped_refptr<NV12Buffer> nv12_buffer(NV12Buffer::Create(width, height));
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EXPECT_EQ(width, nv12_buffer->width());
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EXPECT_EQ(height, nv12_buffer->height());
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EXPECT_EQ(stride_y, nv12_buffer->StrideY());
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EXPECT_EQ(stride_uv, nv12_buffer->StrideUV());
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EXPECT_EQ(2, nv12_buffer->ChromaWidth());
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EXPECT_EQ(2, nv12_buffer->ChromaHeight());
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}
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TEST(NV12BufferTest, ReadPixels) {
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constexpr int width = 3;
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constexpr int height = 3;
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rtc::scoped_refptr<NV12Buffer> nv12_buffer(NV12Buffer::Create(width, height));
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// Y = 1, U = 2, V = 3.
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FillNV12Buffer(nv12_buffer);
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for (int row = 0; row < height; row++) {
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for (int col = 0; col < width; col++) {
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EXPECT_EQ(1, GetY(nv12_buffer, col, row));
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EXPECT_EQ(2, GetU(nv12_buffer, col, row));
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EXPECT_EQ(3, GetV(nv12_buffer, col, row));
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}
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}
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}
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TEST(NV12BufferTest, ToI420) {
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constexpr int width = 3;
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constexpr int height = 3;
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constexpr int size_y = width * height;
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constexpr int size_u = (width + 1) / 2 * (height + 1) / 2;
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constexpr int size_v = (width + 1) / 2 * (height + 1) / 2;
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rtc::scoped_refptr<I420Buffer> reference(I420Buffer::Create(width, height));
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memset(reference->MutableDataY(), 8, size_y);
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memset(reference->MutableDataU(), 4, size_u);
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memset(reference->MutableDataV(), 2, size_v);
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rtc::scoped_refptr<NV12Buffer> nv12_buffer(NV12Buffer::Create(width, height));
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// Convert the reference buffer to NV12.
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memset(nv12_buffer->MutableDataY(), 8, size_y);
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// Interleaving u/v values.
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for (int i = 0; i < size_u + size_v; i += 2) {
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nv12_buffer->MutableDataUV()[i] = 4;
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nv12_buffer->MutableDataUV()[i + 1] = 2;
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}
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// Confirm YUV values are as expected.
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for (int row = 0; row < height; row++) {
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for (int col = 0; col < width; col++) {
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EXPECT_EQ(8, GetY(nv12_buffer, col, row));
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EXPECT_EQ(4, GetU(nv12_buffer, col, row));
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EXPECT_EQ(2, GetV(nv12_buffer, col, row));
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}
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}
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rtc::scoped_refptr<I420BufferInterface> i420_buffer(nv12_buffer->ToI420());
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EXPECT_EQ(height, i420_buffer->height());
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EXPECT_EQ(width, i420_buffer->width());
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EXPECT_TRUE(test::FrameBufsEqual(reference, i420_buffer));
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}
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} // namespace webrtc
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