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// Copyright 2019 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_LIBAOM_AOM_VIDEO_DECODER_H_
#define STARBOARD_SHARED_LIBAOM_AOM_VIDEO_DECODER_H_
#include <aom/aom_codec.h>
#include <queue>
#include <string>
#include "starboard/common/ref_counted.h"
#include "starboard/media.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/shared/starboard/player/job_queue.h"
#include "starboard/shared/starboard/player/job_thread.h"
namespace starboard {
namespace shared {
namespace aom {
class VideoDecoder : public starboard::player::filter::VideoDecoder,
private starboard::player::JobQueue::JobOwner {
public:
VideoDecoder(SbMediaVideoCodec video_codec,
SbPlayerOutputMode output_mode,
SbDecodeTargetGraphicsContextProvider*
decode_target_graphics_context_provider);
~VideoDecoder() override;
void Initialize(const DecoderStatusCB& decoder_status_cb,
const ErrorCB& error_cb) override;
size_t GetPrerollFrameCount() const override { return 8; }
int64_t GetPrerollTimeout() const override { return kSbInt64Max; }
size_t GetMaxNumberOfCachedFrames() const override { return 12; }
void WriteInputBuffers(const InputBuffers& input_buffers) override;
void WriteEndOfStream() override;
void Reset() override;
private:
typedef ::starboard::shared::starboard::player::filter::CpuVideoFrame
CpuVideoFrame;
void ReportError(const std::string& error_message);
// The following four functions are only called on the decoder thread except
// that TeardownCodec() can also be called on other threads when the decoder
// thread is not running.
void InitializeCodec();
void TeardownCodec();
void DecodeOneBuffer(const scoped_refptr<InputBuffer>& input_buffer);
void DecodeEndOfStream();
SbDecodeTarget GetCurrentDecodeTarget() override;
void UpdateDecodeTarget_Locked(const scoped_refptr<CpuVideoFrame>& frame);
// 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_;
int current_frame_width_;
int current_frame_height_;
scoped_ptr<aom_codec_ctx_t> context_;
bool stream_ended_;
bool error_occurred_;
// Working thread to avoid lengthy decoding work block the player thread.
scoped_ptr<starboard::player::JobThread> 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_;
std::queue<scoped_refptr<CpuVideoFrame>> frames_;
};
} // namespace aom
} // namespace shared
} // namespace starboard
#endif // STARBOARD_SHARED_LIBAOM_AOM_VIDEO_DECODER_H_