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/*
* Copyright (c) 2014 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.
*/
#ifndef WEBRTC_VIDEO_FRAME_H_
#define WEBRTC_VIDEO_FRAME_H_
#include "webrtc/base/scoped_ref_ptr.h"
#include "webrtc/base/timeutils.h"
#include "webrtc/common_types.h"
#include "webrtc/common_video/include/video_frame_buffer.h"
#include "webrtc/common_video/rotation.h"
#include "webrtc/typedefs.h"
namespace webrtc {
// TODO(nisse): This class duplicates cricket::VideoFrame. There's
// ongoing work to merge the classes. See
// https://bugs.chromium.org/p/webrtc/issues/detail?id=5682.
class VideoFrame {
public:
// TODO(nisse): Deprecated. Using the default constructor violates the
// reasonable assumption that video_frame_buffer() returns a valid buffer.
VideoFrame();
// TODO(nisse): This constructor is consistent with
// cricket::WebRtcVideoFrame. After the class
// cricket::WebRtcVideoFrame and its baseclass cricket::VideoFrame
// are deleted, we should consider whether or not we want to stick
// to this style and deprecate the other constructors.
VideoFrame(const rtc::scoped_refptr<VideoFrameBuffer>& buffer,
webrtc::VideoRotation rotation,
int64_t timestamp_us);
// Preferred constructor.
VideoFrame(const rtc::scoped_refptr<VideoFrameBuffer>& buffer,
uint32_t timestamp,
int64_t render_time_ms,
VideoRotation rotation);
// CreateEmptyFrame: Sets frame dimensions and allocates buffers based
// on set dimensions - height and plane stride.
// If required size is bigger than the allocated one, new buffers of adequate
// size will be allocated.
// TODO(nisse): Deprecated. Should be deleted in the cricket::VideoFrame and
// webrtc::VideoFrame merge. If you need to write into the frame, create a
// VideoFrameBuffer of the desired size, e.g, using I420Buffer::Create and
// write to that. And if you need to wrap it into a VideoFrame, pass it to the
// constructor.
void CreateEmptyFrame(int width,
int height,
int stride_y,
int stride_u,
int stride_v);
// CreateFrame: Sets the frame's members and buffers. If required size is
// bigger than allocated one, new buffers of adequate size will be allocated.
// TODO(nisse): Deprecated. Should be deleted in the cricket::VideoFrame and
// webrtc::VideoFrame merge. Instead, create a VideoFrameBuffer and pass to
// the constructor. E.g, use I420Buffer::Copy(WrappedI420Buffer(...)).
void 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);
// CreateFrame: Sets the frame's members and buffers. If required size is
// bigger than allocated one, new buffers of adequate size will be allocated.
// |buffer| must be a packed I420 buffer.
// TODO(nisse): Deprecated, see above method for advice.
void CreateFrame(const uint8_t* buffer,
int width,
int height,
VideoRotation rotation);
// Deep copy frame: If required size is bigger than allocated one, new
// buffers of adequate size will be allocated.
// TODO(nisse): Should be deleted in the cricket::VideoFrame and
// webrtc::VideoFrame merge. Instead, use I420Buffer::Copy to make a copy of
// the pixel data, and use the constructor to wrap it into a VideoFrame.
void CopyFrame(const VideoFrame& videoFrame);
// Creates a shallow copy of |videoFrame|, i.e, the this object will retain a
// reference to the video buffer also retained by |videoFrame|.
// TODO(nisse): Deprecated. Should be deleted in the cricket::VideoFrame and
// webrtc::VideoFrame merge. Instead, pass video_frame_buffer() and timestamps
// to the constructor.
void ShallowCopy(const VideoFrame& videoFrame);
// Get frame width.
int width() const;
// Get frame height.
int height() const;
// System monotonic clock, same timebase as rtc::TimeMicros().
int64_t timestamp_us() const { return timestamp_us_; }
void set_timestamp_us(int64_t timestamp_us) {
timestamp_us_ = timestamp_us;
}
// TODO(nisse): After the cricket::VideoFrame and webrtc::VideoFrame
// merge, timestamps other than timestamp_us will likely be
// deprecated.
// Set frame timestamp (90kHz).
void set_timestamp(uint32_t timestamp) { timestamp_rtp_ = timestamp; }
// Get frame timestamp (90kHz).
uint32_t timestamp() const { return timestamp_rtp_; }
// Set capture ntp time in milliseconds.
void set_ntp_time_ms(int64_t ntp_time_ms) {
ntp_time_ms_ = ntp_time_ms;
}
// Get capture ntp time in milliseconds.
int64_t ntp_time_ms() const { return ntp_time_ms_; }
// Naming convention for Coordination of Video Orientation. Please see
// http://www.etsi.org/deliver/etsi_ts/126100_126199/126114/12.07.00_60/ts_126114v120700p.pdf
//
// "pending rotation" or "pending" = a frame that has a VideoRotation > 0.
//
// "not pending" = a frame that has a VideoRotation == 0.
//
// "apply rotation" = modify a frame from being "pending" to being "not
// pending" rotation (a no-op for "unrotated").
//
VideoRotation rotation() const { return rotation_; }
void set_rotation(VideoRotation rotation) {
rotation_ = rotation;
}
// Set render time in milliseconds.
void set_render_time_ms(int64_t render_time_ms) {
set_timestamp_us(render_time_ms * rtc::kNumMicrosecsPerMillisec);;
}
// Get render time in milliseconds.
int64_t render_time_ms() const {
return timestamp_us() / rtc::kNumMicrosecsPerMillisec;
}
// Return true if and only if video_frame_buffer() is null. Which is possible
// only if the object was default-constructed.
// TODO(nisse): Deprecated. Should be deleted in the cricket::VideoFrame and
// webrtc::VideoFrame merge. The intention is that video_frame_buffer() never
// should return nullptr. To handle potentially uninitialized or non-existent
// frames, consider using rtc::Optional. Otherwise, IsZeroSize() can be
// replaced by video_frame_buffer() == nullptr.
bool IsZeroSize() const;
// Return the underlying buffer. Never nullptr for a properly
// initialized VideoFrame.
// Creating a new reference breaks the HasOneRef and IsMutable
// logic. So return a const ref to our reference.
const rtc::scoped_refptr<webrtc::VideoFrameBuffer>& video_frame_buffer()
const;
// Return true if the frame is stored in a texture.
bool is_texture() {
return video_frame_buffer() &&
video_frame_buffer()->native_handle() != nullptr;
}
private:
// An opaque reference counted handle that stores the pixel data.
rtc::scoped_refptr<webrtc::VideoFrameBuffer> video_frame_buffer_;
uint32_t timestamp_rtp_;
int64_t ntp_time_ms_;
int64_t timestamp_us_;
VideoRotation rotation_;
};
// TODO(pbos): Rename EncodedFrame and reformat this class' members.
class EncodedImage {
public:
static const size_t kBufferPaddingBytesH264;
// Some decoders require encoded image buffers to be padded with a small
// number of additional bytes (due to over-reading byte readers).
static size_t GetBufferPaddingBytes(VideoCodecType codec_type);
EncodedImage() : EncodedImage(nullptr, 0, 0) {}
EncodedImage(uint8_t* buffer, size_t length, size_t size)
: _buffer(buffer), _length(length), _size(size) {}
struct AdaptReason {
AdaptReason()
: quality_resolution_downscales(-1),
bw_resolutions_disabled(-1) {}
int quality_resolution_downscales; // Number of times this frame is down
// scaled in resolution due to quality.
// Or -1 if information is not provided.
int bw_resolutions_disabled; // Number of resolutions that are not sent
// due to bandwidth for this frame.
// Or -1 if information is not provided.
};
uint32_t _encodedWidth = 0;
uint32_t _encodedHeight = 0;
uint32_t _timeStamp = 0;
// NTP time of the capture time in local timebase in milliseconds.
int64_t ntp_time_ms_ = 0;
int64_t capture_time_ms_ = 0;
FrameType _frameType = kVideoFrameDelta;
uint8_t* _buffer;
size_t _length;
size_t _size;
VideoRotation rotation_ = kVideoRotation_0;
bool _completeFrame = false;
AdaptReason adapt_reason_;
int qp_ = -1; // Quantizer value.
// When an application indicates non-zero values here, it is taken as an
// indication that all future frames will be constrained with those limits
// until the application indicates a change again.
PlayoutDelay playout_delay_ = {-1, -1};
};
} // namespace webrtc
#endif // WEBRTC_VIDEO_FRAME_H_