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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_MP4_MP4_STREAM_PARSER_H_
#define MEDIA_MP4_MP4_STREAM_PARSER_H_
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "media/base/media_export.h"
#include "media/base/stream_parser.h"
#include "media/mp4/offset_byte_queue.h"
#include "media/mp4/track_run_iterator.h"
namespace media {
namespace mp4 {
struct Movie;
class BoxReader;
class MEDIA_EXPORT MP4StreamParser : public StreamParser {
public:
MP4StreamParser();
virtual ~MP4StreamParser();
virtual void Init(const InitCB& init_cb, const NewConfigCB& config_cb,
const NewBuffersCB& audio_cb,
const NewBuffersCB& video_cb,
const NeedKeyCB& need_key_cb,
const NewMediaSegmentCB& new_segment_cb) OVERRIDE;
virtual void Flush() OVERRIDE;
virtual bool Parse(const uint8* buf, int size) OVERRIDE;
private:
enum State {
kWaitingForInit,
kParsingBoxes,
kEmittingSamples,
kError
};
bool ParseBox(bool* err);
bool ParseMoov(mp4::BoxReader* reader);
bool ParseMoof(mp4::BoxReader* reader);
bool ReadMDATsUntil(const int64 tgt_tail);
void ChangeState(State new_state);
bool EmitConfigs();
bool EnqueueSample(BufferQueue* audio_buffers,
BufferQueue* video_buffers,
bool* err);
State state_;
InitCB init_cb_;
NewConfigCB config_cb_;
NewBuffersCB audio_cb_;
NewBuffersCB video_cb_;
NeedKeyCB need_key_cb_;
NewMediaSegmentCB new_segment_cb_;
OffsetByteQueue queue_;
// These two parameters are only valid in the |kEmittingSegments| state.
//
// |moof_head_| is the offset of the start of the most recently parsed moof
// block. All byte offsets in sample information are relative to this offset,
// as mandated by the Media Source spec.
int64 moof_head_;
// |mdat_tail_| is the stream offset of the end of the current 'mdat' box.
// Valid iff it is greater than the head of the queue.
int64 mdat_tail_;
mp4::TrackRunIterator runs_;
scoped_ptr<mp4::Movie> moov_;
bool has_audio_;
bool has_video_;
uint32 audio_track_id_;
uint32 video_track_id_;
bool parameter_sets_inserted_;
// We keep this around to avoid having to go digging through the moov with
// every frame.
uint8 size_of_nalu_length_;
DISALLOW_COPY_AND_ASSIGN(MP4StreamParser);
};
} // namespace mp4
} // namespace media
#endif // MEDIA_MP4_MP4_STREAM_PARSER_H_
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