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// Copyright 2017 Google Inc. 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_LIBVPX_VPX_VIDEO_DECODER_H_
#define STARBOARD_SHARED_LIBVPX_VPX_VIDEO_DECODER_H_
#include "starboard/log.h"
#include "starboard/media.h"
#include "starboard/queue.h"
#include "starboard/shared/internal_only.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/video_frame_internal.h"
#include "starboard/thread.h"
#define VPX_CODEC_DISABLE_COMPAT 1
#include "third_party/libvpx/vpx/vp8dx.h"
#include "third_party/libvpx/vpx/vpx_decoder.h"
namespace starboard {
namespace shared {
namespace vpx {
class VideoDecoder : public starboard::player::filter::HostedVideoDecoder {
public:
typedef starboard::player::InputBuffer InputBuffer;
typedef starboard::player::VideoFrame VideoFrame;
VideoDecoder(SbMediaVideoCodec video_codec,
SbPlayerOutputMode output_mode,
SbDecodeTargetGraphicsContextProvider*
decode_target_graphics_context_provider);
~VideoDecoder() SB_OVERRIDE;
void SetHost(Host* host) SB_OVERRIDE;
void WriteInputBuffer(const InputBuffer& input_buffer) SB_OVERRIDE;
void WriteEndOfStream() SB_OVERRIDE;
void Reset() SB_OVERRIDE;
private:
enum EventType {
kInvalid,
kReset,
kWriteInputBuffer,
kWriteEndOfStream,
};
struct Event {
EventType type;
// |input_buffer| is only used when |type| is kWriteInputBuffer.
InputBuffer input_buffer;
explicit Event(EventType type = kInvalid) : type(type) {
SB_DCHECK(type != kWriteInputBuffer);
}
explicit Event(InputBuffer input_buffer)
: type(kWriteInputBuffer), input_buffer(input_buffer) {}
};
static void* ThreadEntryPoint(void* context);
void DecoderThreadFunc();
void ReportError();
// The following three 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 InputBuffer& input_buffer);
SbDecodeTarget GetCurrentDecodeTarget() SB_OVERRIDE;
bool UpdateDecodeTarget(const scoped_refptr<VideoFrame>& frame);
// |host_| will be initialized inside SetHost() and will not be changed during
// the life time of this class.
Host* host_;
Queue<Event> queue_;
int current_frame_width_;
int current_frame_height_;
scoped_ptr<vpx_codec_ctx> context_;
bool stream_ended_;
bool error_occured_;
// 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_;
};
} // namespace vpx
} // namespace shared
} // namespace starboard
#endif // STARBOARD_SHARED_LIBVPX_VPX_VIDEO_DECODER_H_