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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/video_frame.h"
#include <string.h>
#include <algorithm> // swap
#include "webrtc/base/bind.h"
#include "webrtc/base/checks.h"
namespace webrtc {
VideoFrame::VideoFrame() {
// Intentionally using Reset instead of initializer list so that any missed
// fields in Reset will be caught by memory checkers.
Reset();
}
VideoFrame::VideoFrame(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) {
}
int VideoFrame::CreateEmptyFrame(int width,
int height,
int stride_y,
int stride_u,
int stride_v) {
const int half_width = (width + 1) / 2;
RTC_DCHECK_GT(width, 0);
RTC_DCHECK_GT(height, 0);
RTC_DCHECK_GE(stride_y, width);
RTC_DCHECK_GE(stride_u, half_width);
RTC_DCHECK_GE(stride_v, half_width);
// 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 VideoFrame::CreateFrame(const uint8_t* buffer_y,
const uint8_t* buffer_u,
const uint8_t* buffer_v,
int width,
int height,
int stride_y,
int stride_u,
int stride_v) {
return CreateFrame(buffer_y, buffer_u, buffer_v, width, height, stride_y,
stride_u, stride_v, kVideoRotation_0);
}
int VideoFrame::CreateFrame(const uint8_t* buffer_y,
const uint8_t* buffer_u,
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;
CreateEmptyFrame(width, height, stride_y, stride_u, stride_v);
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 VideoFrame::CreateFrame(const uint8_t* buffer,
int width,
int height,
VideoRotation rotation) {
const int stride_y = width;
const int stride_uv = (width + 1) / 2;
const uint8_t* buffer_y = buffer;
const uint8_t* buffer_u = buffer_y + stride_y * height;
const uint8_t* buffer_v = buffer_u + stride_uv * ((height + 1) / 2);
return CreateFrame(buffer_y, buffer_u, buffer_v, width, height, stride_y,
stride_uv, stride_uv, rotation);
}
int VideoFrame::CopyFrame(const VideoFrame& videoFrame) {
if (videoFrame.IsZeroSize()) {
video_frame_buffer_ = nullptr;
} else if (videoFrame.native_handle()) {
video_frame_buffer_ = videoFrame.video_frame_buffer();
} else {
CreateFrame(videoFrame.buffer(kYPlane), videoFrame.buffer(kUPlane),
videoFrame.buffer(kVPlane), videoFrame.width(),
videoFrame.height(), videoFrame.stride(kYPlane),
videoFrame.stride(kUPlane), videoFrame.stride(kVPlane));
}
timestamp_ = videoFrame.timestamp_;
ntp_time_ms_ = videoFrame.ntp_time_ms_;
render_time_ms_ = videoFrame.render_time_ms_;
rotation_ = videoFrame.rotation_;
return 0;
}
void VideoFrame::ShallowCopy(const VideoFrame& 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_;
}
void VideoFrame::Reset() {
video_frame_buffer_ = nullptr;
timestamp_ = 0;
ntp_time_ms_ = 0;
render_time_ms_ = 0;
rotation_ = kVideoRotation_0;
}
uint8_t* VideoFrame::buffer(PlaneType type) {
return video_frame_buffer_ ? video_frame_buffer_->MutableData(type)
: nullptr;
}
const uint8_t* VideoFrame::buffer(PlaneType type) const {
return video_frame_buffer_ ? video_frame_buffer_->data(type) : nullptr;
}
int VideoFrame::allocated_size(PlaneType type) const {
const int plane_height = (type == kYPlane) ? height() : (height() + 1) / 2;
return plane_height * stride(type);
}
int VideoFrame::stride(PlaneType type) const {
return video_frame_buffer_ ? video_frame_buffer_->stride(type) : 0;
}
int VideoFrame::width() const {
return video_frame_buffer_ ? video_frame_buffer_->width() : 0;
}
int VideoFrame::height() const {
return video_frame_buffer_ ? video_frame_buffer_->height() : 0;
}
bool VideoFrame::IsZeroSize() const {
return !video_frame_buffer_;
}
void* VideoFrame::native_handle() const {
return video_frame_buffer_ ? video_frame_buffer_->native_handle() : nullptr;
}
rtc::scoped_refptr<VideoFrameBuffer> VideoFrame::video_frame_buffer() const {
return video_frame_buffer_;
}
void VideoFrame::set_video_frame_buffer(
const rtc::scoped_refptr<webrtc::VideoFrameBuffer>& buffer) {
video_frame_buffer_ = buffer;
}
VideoFrame VideoFrame::ConvertNativeToI420Frame() const {
RTC_DCHECK(native_handle());
VideoFrame frame;
frame.ShallowCopy(*this);
frame.set_video_frame_buffer(video_frame_buffer_->NativeToI420Buffer());
return frame;
}
} // namespace webrtc
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