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-rw-r--r--third_party/libwebrtc/api/video/i422_buffer.cc237
1 files changed, 237 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/video/i422_buffer.cc b/third_party/libwebrtc/api/video/i422_buffer.cc
new file mode 100644
index 0000000000..fddc1b57fd
--- /dev/null
+++ b/third_party/libwebrtc/api/video/i422_buffer.cc
@@ -0,0 +1,237 @@
+/*
+ * Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+#include "api/video/i422_buffer.h"
+
+#include <string.h>
+
+#include <algorithm>
+#include <utility>
+
+#include "api/make_ref_counted.h"
+#include "api/video/i420_buffer.h"
+#include "rtc_base/checks.h"
+#include "third_party/libyuv/include/libyuv/convert.h"
+#include "third_party/libyuv/include/libyuv/planar_functions.h"
+#include "third_party/libyuv/include/libyuv/scale.h"
+
+// Aligning pointer to 64 bytes for improved performance, e.g. use SIMD.
+static const int kBufferAlignment = 64;
+
+namespace webrtc {
+
+namespace {
+
+int I422DataSize(int height, int stride_y, int stride_u, int stride_v) {
+ return stride_y * height + stride_u * height + stride_v * height;
+}
+} // namespace
+
+I422Buffer::I422Buffer(int width, int height)
+ : I422Buffer(width, height, width, (width + 1) / 2, (width + 1) / 2) {}
+
+I422Buffer::I422Buffer(int width,
+ int height,
+ int stride_y,
+ int stride_u,
+ int stride_v)
+ : width_(width),
+ height_(height),
+ stride_y_(stride_y),
+ stride_u_(stride_u),
+ stride_v_(stride_v),
+ data_(static_cast<uint8_t*>(
+ AlignedMalloc(I422DataSize(height, stride_y, stride_u, stride_v),
+ kBufferAlignment))) {
+ RTC_DCHECK_GT(width, 0);
+ RTC_DCHECK_GT(height, 0);
+ RTC_DCHECK_GE(stride_y, width);
+ RTC_DCHECK_GE(stride_u, (width + 1) / 2);
+ RTC_DCHECK_GE(stride_v, (width + 1) / 2);
+}
+
+I422Buffer::~I422Buffer() {}
+
+// static
+rtc::scoped_refptr<I422Buffer> I422Buffer::Create(int width, int height) {
+ return rtc::make_ref_counted<I422Buffer>(width, height);
+}
+
+// static
+rtc::scoped_refptr<I422Buffer> I422Buffer::Create(int width,
+ int height,
+ int stride_y,
+ int stride_u,
+ int stride_v) {
+ return rtc::make_ref_counted<I422Buffer>(width, height, stride_y, stride_u,
+ stride_v);
+}
+
+// static
+rtc::scoped_refptr<I422Buffer> I422Buffer::Copy(
+ const I422BufferInterface& source) {
+ return Copy(source.width(), source.height(), source.DataY(), source.StrideY(),
+ source.DataU(), source.StrideU(), source.DataV(),
+ source.StrideV());
+}
+
+// static
+rtc::scoped_refptr<I422Buffer> I422Buffer::Copy(
+ const I420BufferInterface& source) {
+ const int width = source.width();
+ const int height = source.height();
+ rtc::scoped_refptr<I422Buffer> buffer = Create(width, height);
+ int res = libyuv::I420ToI422(
+ source.DataY(), source.StrideY(), source.DataU(), source.StrideU(),
+ source.DataV(), source.StrideV(), buffer->MutableDataY(),
+ buffer->StrideY(), buffer->MutableDataU(), buffer->StrideU(),
+ buffer->MutableDataV(), buffer->StrideV(), width, height);
+ RTC_DCHECK_EQ(res, 0);
+
+ return buffer;
+}
+
+// static
+rtc::scoped_refptr<I422Buffer> I422Buffer::Copy(int width,
+ int height,
+ const uint8_t* data_y,
+ int stride_y,
+ const uint8_t* data_u,
+ int stride_u,
+ const uint8_t* data_v,
+ int stride_v) {
+ // Note: May use different strides than the input data.
+ rtc::scoped_refptr<I422Buffer> buffer = Create(width, height);
+ int res = libyuv::I422Copy(data_y, stride_y, data_u, stride_u, data_v,
+ stride_v, buffer->MutableDataY(),
+ buffer->StrideY(), buffer->MutableDataU(),
+ buffer->StrideU(), buffer->MutableDataV(),
+ buffer->StrideV(), width, height);
+ RTC_DCHECK_EQ(res, 0);
+
+ return buffer;
+}
+
+// static
+rtc::scoped_refptr<I422Buffer> I422Buffer::Rotate(
+ const I422BufferInterface& src,
+ VideoRotation rotation) {
+ RTC_CHECK(src.DataY());
+ RTC_CHECK(src.DataU());
+ RTC_CHECK(src.DataV());
+
+ int rotated_width = src.width();
+ int rotated_height = src.height();
+ if (rotation == webrtc::kVideoRotation_90 ||
+ rotation == webrtc::kVideoRotation_270) {
+ std::swap(rotated_width, rotated_height);
+ }
+
+ rtc::scoped_refptr<webrtc::I422Buffer> buffer =
+ I422Buffer::Create(rotated_width, rotated_height);
+
+ int res = libyuv::I422Rotate(
+ src.DataY(), src.StrideY(), src.DataU(), src.StrideU(), src.DataV(),
+ src.StrideV(), buffer->MutableDataY(), buffer->StrideY(),
+ buffer->MutableDataU(), buffer->StrideU(), buffer->MutableDataV(),
+ buffer->StrideV(), src.width(), src.height(),
+ static_cast<libyuv::RotationMode>(rotation));
+ RTC_DCHECK_EQ(res, 0);
+
+ return buffer;
+}
+
+rtc::scoped_refptr<I420BufferInterface> I422Buffer::ToI420() {
+ rtc::scoped_refptr<I420Buffer> i420_buffer =
+ I420Buffer::Create(width(), height());
+ int res = libyuv::I422ToI420(
+ DataY(), StrideY(), DataU(), StrideU(), DataV(), StrideV(),
+ i420_buffer->MutableDataY(), i420_buffer->StrideY(),
+ i420_buffer->MutableDataU(), i420_buffer->StrideU(),
+ i420_buffer->MutableDataV(), i420_buffer->StrideV(), width(), height());
+ RTC_DCHECK_EQ(res, 0);
+
+ return i420_buffer;
+}
+
+void I422Buffer::InitializeData() {
+ memset(data_.get(), 0,
+ I422DataSize(height_, stride_y_, stride_u_, stride_v_));
+}
+
+int I422Buffer::width() const {
+ return width_;
+}
+
+int I422Buffer::height() const {
+ return height_;
+}
+
+const uint8_t* I422Buffer::DataY() const {
+ return data_.get();
+}
+const uint8_t* I422Buffer::DataU() const {
+ return data_.get() + stride_y_ * height_;
+}
+const uint8_t* I422Buffer::DataV() const {
+ return data_.get() + stride_y_ * height_ + stride_u_ * height_;
+}
+
+int I422Buffer::StrideY() const {
+ return stride_y_;
+}
+int I422Buffer::StrideU() const {
+ return stride_u_;
+}
+int I422Buffer::StrideV() const {
+ return stride_v_;
+}
+
+uint8_t* I422Buffer::MutableDataY() {
+ return const_cast<uint8_t*>(DataY());
+}
+uint8_t* I422Buffer::MutableDataU() {
+ return const_cast<uint8_t*>(DataU());
+}
+uint8_t* I422Buffer::MutableDataV() {
+ return const_cast<uint8_t*>(DataV());
+}
+
+void I422Buffer::CropAndScaleFrom(const I422BufferInterface& src,
+ int offset_x,
+ int offset_y,
+ int crop_width,
+ int crop_height) {
+ RTC_CHECK_LE(crop_width, src.width());
+ RTC_CHECK_LE(crop_height, src.height());
+ RTC_CHECK_LE(crop_width + offset_x, src.width());
+ RTC_CHECK_LE(crop_height + offset_y, src.height());
+ RTC_CHECK_GE(offset_x, 0);
+ RTC_CHECK_GE(offset_y, 0);
+
+ // Make sure offset is even so that u/v plane becomes aligned.
+ const int uv_offset_x = offset_x / 2;
+ const int uv_offset_y = offset_y;
+ offset_x = uv_offset_x * 2;
+
+ const uint8_t* y_plane = src.DataY() + src.StrideY() * offset_y + offset_x;
+ const uint8_t* u_plane =
+ src.DataU() + src.StrideU() * uv_offset_y + uv_offset_x;
+ const uint8_t* v_plane =
+ src.DataV() + src.StrideV() * uv_offset_y + uv_offset_x;
+
+ int res =
+ libyuv::I422Scale(y_plane, src.StrideY(), u_plane, src.StrideU(), v_plane,
+ src.StrideV(), crop_width, crop_height, MutableDataY(),
+ StrideY(), MutableDataU(), StrideU(), MutableDataV(),
+ StrideV(), width(), height(), libyuv::kFilterBox);
+ RTC_DCHECK_EQ(res, 0);
+}
+
+} // namespace webrtc
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