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/*
* Copyright (c) 2018 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 VIDEO_VIDEO_STREAM_DECODER_IMPL_H_
#define VIDEO_VIDEO_STREAM_DECODER_IMPL_H_
#include <map>
#include <memory>
#include <utility>
#include "api/optional.h"
#include "api/video/video_stream_decoder.h"
#include "modules/video_coding/frame_buffer2.h"
#include "modules/video_coding/jitter_estimator.h"
#include "modules/video_coding/timing.h"
#include "rtc_base/platform_thread.h"
#include "rtc_base/task_queue.h"
#include "rtc_base/thread_checker.h"
#include "system_wrappers/include/clock.h"
namespace webrtc {
class VideoStreamDecoderImpl : public VideoStreamDecoder,
private DecodedImageCallback {
public:
VideoStreamDecoderImpl(
VideoStreamDecoder::Callbacks* callbacks,
VideoDecoderFactory* decoder_factory,
std::map<int, std::pair<SdpVideoFormat, int>> decoder_settings);
~VideoStreamDecoderImpl() override;
void OnFrame(std::unique_ptr<video_coding::EncodedFrame> frame) override;
private:
enum DecodeResult {
kOk,
kDecodeFailure,
kNoFrame,
kNoDecoder,
kShutdown,
};
struct FrameTimestamps {
int64_t timestamp;
int64_t decode_start_time_ms;
int64_t render_time_us;
};
VideoDecoder* GetDecoder(int payload_type);
static void DecodeLoop(void* ptr);
DecodeResult DecodeNextFrame(int max_wait_time_ms, bool keyframe_required);
FrameTimestamps* GetFrameTimestamps(int64_t timestamp);
// Implements DecodedImageCallback interface
int32_t Decoded(VideoFrame& decodedImage) override;
int32_t Decoded(VideoFrame& decodedImage, int64_t decode_time_ms) override;
void Decoded(VideoFrame& decodedImage,
rtc::Optional<int32_t> decode_time_ms,
rtc::Optional<uint8_t> qp) override;
VideoStreamDecoder::Callbacks* const callbacks_
RTC_PT_GUARDED_BY(bookkeeping_queue_);
VideoDecoderFactory* const decoder_factory_;
std::map<int, std::pair<SdpVideoFormat, int>> decoder_settings_;
// The |bookkeeping_queue_| is used to:
// - Make |callbacks_|.
// - Insert/extract frames from the |frame_buffer_|
// - Synchronize with whatever thread that makes the Decoded callback.
rtc::TaskQueue bookkeeping_queue_;
rtc::PlatformThread decode_thread_;
VCMJitterEstimator jitter_estimator_;
VCMTiming timing_;
video_coding::FrameBuffer frame_buffer_;
video_coding::VideoLayerFrameId last_continuous_id_;
rtc::Optional<int> current_payload_type_;
std::unique_ptr<VideoDecoder> decoder_;
// Some decoders are pipelined so it is not sufficient to save frame info
// for the last frame only.
static constexpr int kFrameTimestampsMemory = 8;
std::array<FrameTimestamps, kFrameTimestampsMemory> frame_timestamps_
RTC_GUARDED_BY(bookkeeping_queue_);
int next_frame_timestamps_index_ RTC_GUARDED_BY(bookkeeping_queue_);
};
} // namespace webrtc
#endif // VIDEO_VIDEO_STREAM_DECODER_IMPL_H_
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