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/*
* Copyright (c) 2012 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 "webrtc/common_video/interface/i420_video_frame.h"
#include <string.h>
#include <algorithm> // swap
#include "webrtc/base/checks.h"
namespace webrtc {
I420VideoFrame::I420VideoFrame()
: timestamp_(0),
ntp_time_ms_(0),
render_time_ms_(0),
rotation_(kVideoRotation_0) {
}
I420VideoFrame::I420VideoFrame(
const rtc::scoped_refptr<VideoFrameBuffer>& buffer,
uint32_t timestamp,
int64_t render_time_ms,
VideoRotation rotation)
: video_frame_buffer_(buffer),
timestamp_(timestamp),
ntp_time_ms_(0),
render_time_ms_(render_time_ms),
rotation_(rotation) {
}
I420VideoFrame::I420VideoFrame(NativeHandle* handle,
int width,
int height,
uint32_t timestamp,
int64_t render_time_ms)
: video_frame_buffer_(
new rtc::RefCountedObject<TextureBuffer>(handle, width, height)),
timestamp_(timestamp),
ntp_time_ms_(0),
render_time_ms_(render_time_ms),
rotation_(kVideoRotation_0) {
}
int I420VideoFrame::CreateEmptyFrame(int width, int height,
int stride_y, int stride_u, int stride_v) {
const int half_width = (width + 1) / 2;
if (width <= 0 || height <= 0 || stride_y < width || stride_u < half_width ||
stride_v < half_width) {
return -1;
}
// Creating empty frame - reset all values.
timestamp_ = 0;
ntp_time_ms_ = 0;
render_time_ms_ = 0;
rotation_ = kVideoRotation_0;
// Check if it's safe to reuse allocation.
if (video_frame_buffer_ &&
video_frame_buffer_->HasOneRef() &&
!video_frame_buffer_->native_handle() &&
width == video_frame_buffer_->width() &&
height == video_frame_buffer_->height() &&
stride_y == stride(kYPlane) &&
stride_u == stride(kUPlane) &&
stride_v == stride(kVPlane)) {
return 0;
}
// Need to allocate new buffer.
video_frame_buffer_ = new rtc::RefCountedObject<I420Buffer>(
width, height, stride_y, stride_u, stride_v);
return 0;
}
int I420VideoFrame::CreateFrame(int size_y, const uint8_t* buffer_y,
int size_u, const uint8_t* buffer_u,
int size_v, const uint8_t* buffer_v,
int width, int height,
int stride_y, int stride_u, int stride_v) {
return CreateFrame(size_y, buffer_y, size_u, buffer_u, size_v, buffer_v,
width, height, stride_y, stride_u, stride_v,
kVideoRotation_0);
}
int I420VideoFrame::CreateFrame(int size_y,
const uint8_t* buffer_y,
int size_u,
const uint8_t* buffer_u,
int size_v,
const uint8_t* buffer_v,
int width,
int height,
int stride_y,
int stride_u,
int stride_v,
VideoRotation rotation) {
const int half_height = (height + 1) / 2;
const int expected_size_y = height * stride_y;
const int expected_size_u = half_height * stride_u;
const int expected_size_v = half_height * stride_v;
CHECK_GE(size_y, expected_size_y);
CHECK_GE(size_u, expected_size_u);
CHECK_GE(size_v, expected_size_v);
if (CreateEmptyFrame(width, height, stride_y, stride_u, stride_v) < 0)
return -1;
memcpy(buffer(kYPlane), buffer_y, expected_size_y);
memcpy(buffer(kUPlane), buffer_u, expected_size_u);
memcpy(buffer(kVPlane), buffer_v, expected_size_v);
rotation_ = rotation;
return 0;
}
int I420VideoFrame::CopyFrame(const I420VideoFrame& videoFrame) {
if (videoFrame.native_handle()) {
video_frame_buffer_ = videoFrame.video_frame_buffer();
} else {
int ret = CreateFrame(
videoFrame.allocated_size(kYPlane), videoFrame.buffer(kYPlane),
videoFrame.allocated_size(kUPlane), videoFrame.buffer(kUPlane),
videoFrame.allocated_size(kVPlane), videoFrame.buffer(kVPlane),
videoFrame.width(), videoFrame.height(), videoFrame.stride(kYPlane),
videoFrame.stride(kUPlane), videoFrame.stride(kVPlane));
if (ret < 0)
return ret;
}
timestamp_ = videoFrame.timestamp_;
ntp_time_ms_ = videoFrame.ntp_time_ms_;
render_time_ms_ = videoFrame.render_time_ms_;
rotation_ = videoFrame.rotation_;
return 0;
}
void I420VideoFrame::ShallowCopy(const I420VideoFrame& videoFrame) {
video_frame_buffer_ = videoFrame.video_frame_buffer();
timestamp_ = videoFrame.timestamp_;
ntp_time_ms_ = videoFrame.ntp_time_ms_;
render_time_ms_ = videoFrame.render_time_ms_;
rotation_ = videoFrame.rotation_;
}
I420VideoFrame* I420VideoFrame::CloneFrame() const {
rtc::scoped_ptr<I420VideoFrame> new_frame(new I420VideoFrame());
if (new_frame->CopyFrame(*this) == -1) {
// CopyFrame failed.
return NULL;
}
return new_frame.release();
}
void I420VideoFrame::SwapFrame(I420VideoFrame* videoFrame) {
video_frame_buffer_.swap(videoFrame->video_frame_buffer_);
std::swap(timestamp_, videoFrame->timestamp_);
std::swap(ntp_time_ms_, videoFrame->ntp_time_ms_);
std::swap(render_time_ms_, videoFrame->render_time_ms_);
std::swap(rotation_, videoFrame->rotation_);
}
uint8_t* I420VideoFrame::buffer(PlaneType type) {
return video_frame_buffer_ ? video_frame_buffer_->data(type) : nullptr;
}
const uint8_t* I420VideoFrame::buffer(PlaneType type) const {
// Const cast to call the correct const-version of data.
const VideoFrameBuffer* const_buffer = video_frame_buffer_.get();
return const_buffer ? const_buffer->data(type) : nullptr;
}
int I420VideoFrame::allocated_size(PlaneType type) const {
const int plane_height = (type == kYPlane) ? height() : (height() + 1) / 2;
return plane_height * stride(type);
}
int I420VideoFrame::stride(PlaneType type) const {
return video_frame_buffer_ ? video_frame_buffer_->stride(type) : 0;
}
int I420VideoFrame::width() const {
return video_frame_buffer_ ? video_frame_buffer_->width() : 0;
}
int I420VideoFrame::height() const {
return video_frame_buffer_ ? video_frame_buffer_->height() : 0;
}
bool I420VideoFrame::IsZeroSize() const {
return !video_frame_buffer_;
}
void* I420VideoFrame::native_handle() const {
return video_frame_buffer_ ? video_frame_buffer_->native_handle() : nullptr;
}
rtc::scoped_refptr<VideoFrameBuffer> I420VideoFrame::video_frame_buffer()
const {
return video_frame_buffer_;
}
} // namespace webrtc
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