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-rw-r--r--chromium/media/mp3/mp3_stream_parser.h126
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diff --git a/chromium/media/mp3/mp3_stream_parser.h b/chromium/media/mp3/mp3_stream_parser.h
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--- a/chromium/media/mp3/mp3_stream_parser.h
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-// Copyright 2013 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_MP3_MP3_STREAM_PARSER_H_
-#define MEDIA_MP3_MP3_STREAM_PARSER_H_
-
-#include <set>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/callback.h"
-#include "media/base/audio_decoder_config.h"
-#include "media/base/audio_timestamp_helper.h"
-#include "media/base/byte_queue.h"
-#include "media/base/media_export.h"
-#include "media/base/stream_parser.h"
-
-namespace media {
-
-class BitReader;
-
-class MEDIA_EXPORT MP3StreamParser : public StreamParser {
- public:
- MP3StreamParser();
- virtual ~MP3StreamParser();
-
- // StreamParser implementation.
- virtual void Init(const InitCB& init_cb, const NewConfigCB& config_cb,
- const NewBuffersCB& new_buffers_cb,
- const NewTextBuffersCB& text_cb,
- const NeedKeyCB& need_key_cb,
- const NewMediaSegmentCB& new_segment_cb,
- const base::Closure& end_of_segment_cb,
- const LogCB& log_cb) OVERRIDE;
- virtual void Flush() OVERRIDE;
- virtual bool Parse(const uint8* buf, int size) OVERRIDE;
-
- private:
- enum State {
- UNINITIALIZED,
- INITIALIZED,
- PARSE_ERROR
- };
-
- State state_;
-
- InitCB init_cb_;
- NewConfigCB config_cb_;
- NewBuffersCB new_buffers_cb_;
- NewMediaSegmentCB new_segment_cb_;
- base::Closure end_of_segment_cb_;
- LogCB log_cb_;
-
- ByteQueue queue_;
-
- AudioDecoderConfig config_;
- scoped_ptr<AudioTimestampHelper> timestamp_helper_;
- bool in_media_segment_;
-
- void ChangeState(State state);
-
- // Parsing functions for various byte stream elements.
- // |data| & |size| describe the data available for parsing.
- // These functions are expected to consume an entire frame/header.
- // It should only return a value greater than 0 when |data| has
- // enough bytes to successfully parse & consume the entire element.
- //
- // |frame_size| - Required parameter that is set to the size of the frame, in
- // bytes, including the frame header if the function returns a value > 0.
- // |sample_rate| - Optional parameter that is set to the sample rate
- // of the frame if this function returns a value > 0.
- // |channel_layout| - Optional parameter that is set to the channel_layout
- // of the frame if this function returns a value > 0.
- // |sample_count| - Optional parameter that is set to the number of samples
- // in the frame if this function returns a value > 0.
- //
- // |sample_rate|, |channel_layout|, |sample_count| may be NULL if the caller
- // is not interested in receiving these values from the frame header.
- //
- // Returns:
- // > 0 : The number of bytes parsed.
- // 0 : If more data is needed to parse the entire element.
- // < 0 : An error was encountered during parsing.
- int ParseFrameHeader(const uint8* data, int size,
- int* frame_size,
- int* sample_rate,
- ChannelLayout* channel_layout,
- int* sample_count) const;
- int ParseMP3Frame(const uint8* data, int size, BufferQueue* buffers);
- int ParseIcecastHeader(const uint8* data, int size);
- int ParseID3v1(const uint8* data, int size);
- int ParseID3v2(const uint8* data, int size);
-
- // Parses an ID3v2 "sync safe" integer.
- // |reader| - A BitReader to read from.
- // |value| - Set to the integer value read, if true is returned.
- //
- // Returns true if the integer was successfully parsed and |value|
- // was set.
- // Returns false if an error was encountered. The state of |value| is
- // undefined when false is returned.
- bool ParseSyncSafeInt(BitReader* reader, int32* value);
-
- // Scans |data| for the next valid start code.
- // Returns:
- // > 0 : The number of bytes that should be skipped to reach the
- // next start code..
- // 0 : If a valid start code was not found and more data is needed.
- // < 0 : An error was encountered during parsing.
- int FindNextValidStartCode(const uint8* data, int size) const;
-
- // Sends the buffers in |buffers| to |new_buffers_cb_| and then clears
- // |buffers|.
- // If |end_of_segment| is set to true, then |end_of_segment_cb_| is called
- // after |new_buffers_cb_| to signal that these buffers represent the end of a
- // media segment.
- // Returns true if the buffers are sent successfully.
- bool SendBuffers(BufferQueue* buffers, bool end_of_segment);
-
- DISALLOW_COPY_AND_ASSIGN(MP3StreamParser);
-};
-
-} // namespace media
-
-#endif // MEDIA_MP3_MP3_STREAM_PARSER_H_