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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_MP4_AAC_H_ | 5 #ifndef MEDIA_FORMATS_MP4_AAC_H_ |
6 #define MEDIA_FORMATS_MP4_AAC_H_ | 6 #define MEDIA_FORMATS_MP4_AAC_H_ |
7 | 7 |
8 #include <vector> | 8 #include <vector> |
9 | 9 |
10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
11 #include "media/base/channel_layout.h" | 11 #include "media/base/channel_layout.h" |
12 #include "media/base/media_export.h" | 12 #include "media/base/media_export.h" |
| 13 #include "media/base/media_log.h" |
13 | 14 |
14 namespace media { | 15 namespace media { |
15 | 16 |
16 class BitReader; | 17 class BitReader; |
17 | 18 |
18 namespace mp4 { | 19 namespace mp4 { |
19 | 20 |
20 // This class parses the AAC information from decoder specific information | 21 // This class parses the AAC information from decoder specific information |
21 // embedded in the esds box in an ISO BMFF file. | 22 // embedded in the esds box in an ISO BMFF file. |
22 // Please refer to ISO 14496 Part 3 Table 1.13 - Syntax of AudioSpecificConfig | 23 // Please refer to ISO 14496 Part 3 Table 1.13 - Syntax of AudioSpecificConfig |
23 // for more details. | 24 // for more details. |
24 class MEDIA_EXPORT AAC { | 25 class MEDIA_EXPORT AAC { |
25 public: | 26 public: |
26 AAC(); | 27 AAC(); |
27 ~AAC(); | 28 ~AAC(); |
28 | 29 |
29 // Parse the AAC config from the raw binary data embedded in esds box. | 30 // Parse the AAC config from the raw binary data embedded in esds box. |
30 // The function will parse the data and get the ElementaryStreamDescriptor, | 31 // The function will parse the data and get the ElementaryStreamDescriptor, |
31 // then it will parse the ElementaryStreamDescriptor to get audio stream | 32 // then it will parse the ElementaryStreamDescriptor to get audio stream |
32 // configurations. | 33 // configurations. |
33 bool Parse(const std::vector<uint8>& data); | 34 bool Parse(const std::vector<uint8>& data, const LogCB& log_cb); |
34 | 35 |
35 // Gets the output sample rate for the AAC stream. | 36 // Gets the output sample rate for the AAC stream. |
36 // |sbr_in_mimetype| should be set to true if the SBR mode is | 37 // |sbr_in_mimetype| should be set to true if the SBR mode is |
37 // signalled in the mimetype. (ie mp4a.40.5 in the codecs parameter). | 38 // signalled in the mimetype. (ie mp4a.40.5 in the codecs parameter). |
38 // Returns the samples_per_second value that should used in an | 39 // Returns the samples_per_second value that should used in an |
39 // AudioDecoderConfig. | 40 // AudioDecoderConfig. |
40 int GetOutputSamplesPerSecond(bool sbr_in_mimetype) const; | 41 int GetOutputSamplesPerSecond(bool sbr_in_mimetype) const; |
41 | 42 |
42 // Gets the channel layout for the AAC stream. | 43 // Gets the channel layout for the AAC stream. |
43 // |sbr_in_mimetype| should be set to true if the SBR mode is | 44 // |sbr_in_mimetype| should be set to true if the SBR mode is |
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82 int frequency_; | 83 int frequency_; |
83 int extension_frequency_; | 84 int extension_frequency_; |
84 ChannelLayout channel_layout_; | 85 ChannelLayout channel_layout_; |
85 }; | 86 }; |
86 | 87 |
87 } // namespace mp4 | 88 } // namespace mp4 |
88 | 89 |
89 } // namespace media | 90 } // namespace media |
90 | 91 |
91 #endif // MEDIA_FORMATS_MP4_AAC_H_ | 92 #endif // MEDIA_FORMATS_MP4_AAC_H_ |
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