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Side by Side Diff: media/formats/mpeg/mpeg_audio_stream_parser_base.h

Issue 1534273002: Switch to standard integer types in media/. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: more Created 5 years ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved. 1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef MEDIA_FORMATS_MPEG_MPEG_AUDIO_STREAM_PARSER_BASE_H_ 5 #ifndef MEDIA_FORMATS_MPEG_MPEG_AUDIO_STREAM_PARSER_BASE_H_
6 #define MEDIA_FORMATS_MPEG_MPEG_AUDIO_STREAM_PARSER_BASE_H_ 6 #define MEDIA_FORMATS_MPEG_MPEG_AUDIO_STREAM_PARSER_BASE_H_
7 7
8 #include <set> 8 #include <set>
9 #include <vector> 9 #include <vector>
10 10
11 #include "base/basictypes.h"
12 #include "base/callback.h" 11 #include "base/callback.h"
13 #include "media/base/audio_decoder_config.h" 12 #include "media/base/audio_decoder_config.h"
14 #include "media/base/audio_timestamp_helper.h" 13 #include "media/base/audio_timestamp_helper.h"
15 #include "media/base/bit_reader.h" 14 #include "media/base/bit_reader.h"
16 #include "media/base/byte_queue.h" 15 #include "media/base/byte_queue.h"
17 #include "media/base/media_export.h" 16 #include "media/base/media_export.h"
18 #include "media/base/stream_parser.h" 17 #include "media/base/stream_parser.h"
19 18
20 namespace media { 19 namespace media {
21 20
22 class MEDIA_EXPORT MPEGAudioStreamParserBase : public StreamParser { 21 class MEDIA_EXPORT MPEGAudioStreamParserBase : public StreamParser {
23 public: 22 public:
24 // |start_code_mask| is used to find the start of each frame header. Also 23 // |start_code_mask| is used to find the start of each frame header. Also
25 // referred to as the sync code in the MP3 and ADTS header specifications. 24 // referred to as the sync code in the MP3 and ADTS header specifications.
26 // |codec_delay| is the number of samples the decoder will output before the 25 // |codec_delay| is the number of samples the decoder will output before the
27 // first real frame. 26 // first real frame.
28 MPEGAudioStreamParserBase(uint32 start_code_mask, 27 MPEGAudioStreamParserBase(uint32_t start_code_mask,
29 AudioCodec audio_codec, 28 AudioCodec audio_codec,
30 int codec_delay); 29 int codec_delay);
31 ~MPEGAudioStreamParserBase() override; 30 ~MPEGAudioStreamParserBase() override;
32 31
33 // StreamParser implementation. 32 // StreamParser implementation.
34 void Init(const InitCB& init_cb, 33 void Init(const InitCB& init_cb,
35 const NewConfigCB& config_cb, 34 const NewConfigCB& config_cb,
36 const NewBuffersCB& new_buffers_cb, 35 const NewBuffersCB& new_buffers_cb,
37 bool ignore_text_tracks, 36 bool ignore_text_tracks,
38 const EncryptedMediaInitDataCB& encrypted_media_init_data_cb, 37 const EncryptedMediaInitDataCB& encrypted_media_init_data_cb,
39 const NewMediaSegmentCB& new_segment_cb, 38 const NewMediaSegmentCB& new_segment_cb,
40 const base::Closure& end_of_segment_cb, 39 const base::Closure& end_of_segment_cb,
41 const scoped_refptr<MediaLog>& media_log) override; 40 const scoped_refptr<MediaLog>& media_log) override;
42 void Flush() override; 41 void Flush() override;
43 bool Parse(const uint8* buf, int size) override; 42 bool Parse(const uint8_t* buf, int size) override;
44 43
45 protected: 44 protected:
46 // Subclasses implement this method to parse format specific frame headers. 45 // Subclasses implement this method to parse format specific frame headers.
47 // |data| & |size| describe the data available for parsing. 46 // |data| & |size| describe the data available for parsing.
48 // 47 //
49 // Implementations are expected to consume an entire frame header. It should 48 // Implementations are expected to consume an entire frame header. It should
50 // only return a value greater than 0 when |data| has enough bytes to 49 // only return a value greater than 0 when |data| has enough bytes to
51 // successfully parse & consume the entire frame header. 50 // successfully parse & consume the entire frame header.
52 // 51 //
53 // |frame_size| - Required parameter that is set to the size of the frame, in 52 // |frame_size| - Required parameter that is set to the size of the frame, in
(...skipping 12 matching lines...) Expand all
66 // NULL if the caller is not interested in receiving these values from the 65 // NULL if the caller is not interested in receiving these values from the
67 // frame header. 66 // frame header.
68 // 67 //
69 // If |metadata_frame| is true, the MPEGAudioStreamParserBase will discard the 68 // If |metadata_frame| is true, the MPEGAudioStreamParserBase will discard the
70 // frame after consuming the metadata values above. 69 // frame after consuming the metadata values above.
71 // 70 //
72 // Returns: 71 // Returns:
73 // > 0 : The number of bytes parsed. 72 // > 0 : The number of bytes parsed.
74 // 0 : If more data is needed to parse the entire frame header. 73 // 0 : If more data is needed to parse the entire frame header.
75 // < 0 : An error was encountered during parsing. 74 // < 0 : An error was encountered during parsing.
76 virtual int ParseFrameHeader(const uint8* data, 75 virtual int ParseFrameHeader(const uint8_t* data,
77 int size, 76 int size,
78 int* frame_size, 77 int* frame_size,
79 int* sample_rate, 78 int* sample_rate,
80 ChannelLayout* channel_layout, 79 ChannelLayout* channel_layout,
81 int* sample_count, 80 int* sample_count,
82 bool* metadata_frame) const = 0; 81 bool* metadata_frame) const = 0;
83 82
84 const scoped_refptr<MediaLog>& media_log() const { return media_log_; } 83 const scoped_refptr<MediaLog>& media_log() const { return media_log_; }
85 84
86 private: 85 private:
87 enum State { 86 enum State {
88 UNINITIALIZED, 87 UNINITIALIZED,
89 INITIALIZED, 88 INITIALIZED,
90 PARSE_ERROR 89 PARSE_ERROR
91 }; 90 };
92 91
93 void ChangeState(State state); 92 void ChangeState(State state);
94 93
95 // Parsing functions for various byte stream elements. |data| & |size| 94 // Parsing functions for various byte stream elements. |data| & |size|
96 // describe the data available for parsing. 95 // describe the data available for parsing.
97 // 96 //
98 // Returns: 97 // Returns:
99 // > 0 : The number of bytes parsed. 98 // > 0 : The number of bytes parsed.
100 // 0 : If more data is needed to parse the entire element. 99 // 0 : If more data is needed to parse the entire element.
101 // < 0 : An error was encountered during parsing. 100 // < 0 : An error was encountered during parsing.
102 int ParseFrame(const uint8* data, int size, BufferQueue* buffers); 101 int ParseFrame(const uint8_t* data, int size, BufferQueue* buffers);
103 int ParseIcecastHeader(const uint8* data, int size); 102 int ParseIcecastHeader(const uint8_t* data, int size);
104 int ParseID3v1(const uint8* data, int size); 103 int ParseID3v1(const uint8_t* data, int size);
105 int ParseID3v2(const uint8* data, int size); 104 int ParseID3v2(const uint8_t* data, int size);
106 105
107 // Parses an ID3v2 "sync safe" integer. 106 // Parses an ID3v2 "sync safe" integer.
108 // |reader| - A BitReader to read from. 107 // |reader| - A BitReader to read from.
109 // |value| - Set to the integer value read, if true is returned. 108 // |value| - Set to the integer value read, if true is returned.
110 // 109 //
111 // Returns true if the integer was successfully parsed and |value| 110 // Returns true if the integer was successfully parsed and |value|
112 // was set. 111 // was set.
113 // Returns false if an error was encountered. The state of |value| is 112 // Returns false if an error was encountered. The state of |value| is
114 // undefined when false is returned. 113 // undefined when false is returned.
115 bool ParseSyncSafeInt(BitReader* reader, int32* value); 114 bool ParseSyncSafeInt(BitReader* reader, int32_t* value);
116 115
117 // Scans |data| for the next valid start code. 116 // Scans |data| for the next valid start code.
118 // Returns: 117 // Returns:
119 // > 0 : The number of bytes that should be skipped to reach the 118 // > 0 : The number of bytes that should be skipped to reach the
120 // next start code.. 119 // next start code..
121 // 0 : If a valid start code was not found and more data is needed. 120 // 0 : If a valid start code was not found and more data is needed.
122 // < 0 : An error was encountered during parsing. 121 // < 0 : An error was encountered during parsing.
123 int FindNextValidStartCode(const uint8* data, int size) const; 122 int FindNextValidStartCode(const uint8_t* data, int size) const;
124 123
125 // Sends the buffers in |buffers| to |new_buffers_cb_| and then clears 124 // Sends the buffers in |buffers| to |new_buffers_cb_| and then clears
126 // |buffers|. 125 // |buffers|.
127 // If |end_of_segment| is set to true, then |end_of_segment_cb_| is called 126 // If |end_of_segment| is set to true, then |end_of_segment_cb_| is called
128 // after |new_buffers_cb_| to signal that these buffers represent the end of a 127 // after |new_buffers_cb_| to signal that these buffers represent the end of a
129 // media segment. 128 // media segment.
130 // Returns true if the buffers are sent successfully. 129 // Returns true if the buffers are sent successfully.
131 bool SendBuffers(BufferQueue* buffers, bool end_of_segment); 130 bool SendBuffers(BufferQueue* buffers, bool end_of_segment);
132 131
133 State state_; 132 State state_;
134 133
135 InitCB init_cb_; 134 InitCB init_cb_;
136 NewConfigCB config_cb_; 135 NewConfigCB config_cb_;
137 NewBuffersCB new_buffers_cb_; 136 NewBuffersCB new_buffers_cb_;
138 NewMediaSegmentCB new_segment_cb_; 137 NewMediaSegmentCB new_segment_cb_;
139 base::Closure end_of_segment_cb_; 138 base::Closure end_of_segment_cb_;
140 scoped_refptr<MediaLog> media_log_; 139 scoped_refptr<MediaLog> media_log_;
141 140
142 ByteQueue queue_; 141 ByteQueue queue_;
143 142
144 AudioDecoderConfig config_; 143 AudioDecoderConfig config_;
145 scoped_ptr<AudioTimestampHelper> timestamp_helper_; 144 scoped_ptr<AudioTimestampHelper> timestamp_helper_;
146 bool in_media_segment_; 145 bool in_media_segment_;
147 const uint32 start_code_mask_; 146 const uint32_t start_code_mask_;
148 const AudioCodec audio_codec_; 147 const AudioCodec audio_codec_;
149 const int codec_delay_; 148 const int codec_delay_;
150 149
151 DISALLOW_COPY_AND_ASSIGN(MPEGAudioStreamParserBase); 150 DISALLOW_COPY_AND_ASSIGN(MPEGAudioStreamParserBase);
152 }; 151 };
153 152
154 } // namespace media 153 } // namespace media
155 154
156 #endif // MEDIA_FORMATS_MPEG_MPEG_AUDIO_STREAM_PARSER_BASE_H_ 155 #endif // MEDIA_FORMATS_MPEG_MPEG_AUDIO_STREAM_PARSER_BASE_H_
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