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// Copyright 2018 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef STARBOARD_SHARED_FFMPEG_FFMPEG_VIDEO_DECODER_IMPL_H_
#define STARBOARD_SHARED_FFMPEG_FFMPEG_VIDEO_DECODER_IMPL_H_
#include <queue>
#include "starboard/common/log.h"
#include "starboard/common/queue.h"
#include "starboard/common/ref_counted.h"
#include "starboard/media.h"
#include "starboard/shared/ffmpeg/ffmpeg_common.h"
#include "starboard/shared/ffmpeg/ffmpeg_dispatch.h"
#include "starboard/shared/ffmpeg/ffmpeg_video_decoder.h"
#include "starboard/shared/ffmpeg/ffmpeg_video_decoder_impl_interface.h"
#include "starboard/shared/internal_only.h"
#include "starboard/shared/starboard/player/filter/cpu_video_frame.h"
#include "starboard/shared/starboard/player/filter/video_decoder_internal.h"
#include "starboard/shared/starboard/player/input_buffer_internal.h"
#include "starboard/thread.h"
namespace starboard {
namespace shared {
namespace ffmpeg {
// Forward class declaration of the explicit specialization with value FFMPEG.
template <>
class VideoDecoderImpl<FFMPEG>;
// Declare the explicit specialization of the class with value FFMPEG.
template <>
class VideoDecoderImpl<FFMPEG> : public VideoDecoder {
public:
VideoDecoderImpl(SbMediaVideoCodec video_codec,
SbPlayerOutputMode output_mode,
SbDecodeTargetGraphicsContextProvider*
decode_target_graphics_context_provider);
~VideoDecoderImpl() override;
// From: VideoDecoder
static VideoDecoder* Create(SbMediaVideoCodec video_codec,
SbPlayerOutputMode output_mode,
SbDecodeTargetGraphicsContextProvider*
decode_target_graphics_context_provider);
bool is_valid() const override;
// From: starboard::player::filter::VideoDecoder
void Initialize(const DecoderStatusCB& decoder_status_cb,
const ErrorCB& error_cb) override;
size_t GetPrerollFrameCount() const override { return 8; }
SbTime GetPrerollTimeout() const override { return kSbTimeMax; }
size_t GetMaxNumberOfCachedFrames() const override { return 12; }
void WriteInputBuffer(
const scoped_refptr<InputBuffer>& input_buffer) override;
void WriteEndOfStream() override;
void Reset() override;
#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(52, 8, 0)
int AllocateBuffer(AVCodecContext* codec_context, AVFrame* frame, int flags);
#else // LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(52, 8, 0)
int AllocateBuffer(AVCodecContext* codec_context, AVFrame* frame);
#endif // LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(52, 8, 0)
private:
typedef ::starboard::shared::starboard::player::filter::CpuVideoFrame
CpuVideoFrame;
enum EventType {
kInvalid,
kReset,
kWriteInputBuffer,
kWriteEndOfStream,
};
struct Event {
EventType type;
// |input_buffer| is only used when |type| is kWriteInputBuffer.
scoped_refptr<InputBuffer> input_buffer;
explicit Event(EventType type = kInvalid) : type(type) {
SB_DCHECK(type != kWriteInputBuffer);
}
explicit Event(const scoped_refptr<InputBuffer>& input_buffer)
: type(kWriteInputBuffer), input_buffer(input_buffer) {}
};
static void* ThreadEntryPoint(void* context);
void DecoderThreadFunc();
bool DecodePacket(AVPacket* packet);
void InitializeCodec();
void TeardownCodec();
SbDecodeTarget GetCurrentDecodeTarget() override;
void UpdateDecodeTarget_Locked(const scoped_refptr<CpuVideoFrame>& frame);
FFMPEGDispatch* ffmpeg_;
// |video_codec_| will be initialized inside ctor and won't be changed during
// the life time of this class.
const SbMediaVideoCodec video_codec_;
// The following callbacks will be initialized in Initialize() and won't be
// changed during the life time of this class.
DecoderStatusCB decoder_status_cb_;
ErrorCB error_cb_;
Queue<Event> queue_;
// The AV related classes will only be created and accessed on the decoder
// thread.
AVCodecContext* codec_context_;
AVFrame* av_frame_;
bool stream_ended_;
bool error_occurred_;
// Working thread to avoid lengthy decoding work block the player thread.
SbThread decoder_thread_;
// Decode-to-texture related state.
SbPlayerOutputMode output_mode_;
SbDecodeTargetGraphicsContextProvider*
decode_target_graphics_context_provider_;
// If decode-to-texture is enabled, then we store the decode target texture
// inside of this |decode_target_| member.
SbDecodeTarget decode_target_;
// GetCurrentDecodeTarget() needs to be called from an arbitrary thread
// to obtain the current decode target (which ultimately ends up being a
// copy of |decode_target_|), we need to safe-guard access to |decode_target_|
// and we do so through this mutex.
Mutex decode_target_mutex_;
// Mutex frame_mutex_;
// int frame_last_rendered_pts_;
// scoped_refptr<VideoFrame> frame_;
std::queue<scoped_refptr<CpuVideoFrame>> frames_;
};
} // namespace ffmpeg
} // namespace shared
} // namespace starboard
#endif // STARBOARD_SHARED_FFMPEG_FFMPEG_VIDEO_DECODER_IMPL_H_