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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_ES_DESCRIPTOR_H_ | 5 #ifndef MEDIA_FORMATS_MP4_ES_DESCRIPTOR_H_ |
| 6 #define MEDIA_FORMATS_MP4_ES_DESCRIPTOR_H_ | 6 #define MEDIA_FORMATS_MP4_ES_DESCRIPTOR_H_ |
| 7 | 7 |
| 8 #include <stdint.h> |
| 9 |
| 8 #include <vector> | 10 #include <vector> |
| 9 | 11 |
| 10 #include "base/basictypes.h" | |
| 11 #include "media/base/media_export.h" | 12 #include "media/base/media_export.h" |
| 12 | 13 |
| 13 namespace media { | 14 namespace media { |
| 14 | 15 |
| 15 class BitReader; | 16 class BitReader; |
| 16 | 17 |
| 17 namespace mp4 { | 18 namespace mp4 { |
| 18 | 19 |
| 19 // The following values are extracted from ISO 14496 Part 1 Table 5 - | 20 // The following values are extracted from ISO 14496 Part 1 Table 5 - |
| 20 // objectTypeIndication Values. Only values currently in use are included. | 21 // objectTypeIndication Values. Only values currently in use are included. |
| 21 enum ObjectType { | 22 enum ObjectType { |
| 22 kForbidden = 0, | 23 kForbidden = 0, |
| 23 kISO_14496_3 = 0x40, // MPEG4 AAC | 24 kISO_14496_3 = 0x40, // MPEG4 AAC |
| 24 kISO_13818_7_AAC_LC = 0x67 // MPEG2 AAC-LC | 25 kISO_13818_7_AAC_LC = 0x67 // MPEG2 AAC-LC |
| 25 }; | 26 }; |
| 26 | 27 |
| 27 // This class parse object type and decoder specific information from an | 28 // This class parse object type and decoder specific information from an |
| 28 // elementary stream descriptor, which is usually contained in an esds box. | 29 // elementary stream descriptor, which is usually contained in an esds box. |
| 29 // Please refer to ISO 14496 Part 1 7.2.6.5 for more details. | 30 // Please refer to ISO 14496 Part 1 7.2.6.5 for more details. |
| 30 class MEDIA_EXPORT ESDescriptor { | 31 class MEDIA_EXPORT ESDescriptor { |
| 31 public: | 32 public: |
| 32 // Utility function to check if the given object type is AAC. | 33 // Utility function to check if the given object type is AAC. |
| 33 static bool IsAAC(uint8 object_type); | 34 static bool IsAAC(uint8_t object_type); |
| 34 | 35 |
| 35 ESDescriptor(); | 36 ESDescriptor(); |
| 36 ~ESDescriptor(); | 37 ~ESDescriptor(); |
| 37 | 38 |
| 38 bool Parse(const std::vector<uint8>& data); | 39 bool Parse(const std::vector<uint8_t>& data); |
| 39 | 40 |
| 40 uint8 object_type() const; | 41 uint8_t object_type() const; |
| 41 const std::vector<uint8>& decoder_specific_info() const; | 42 const std::vector<uint8_t>& decoder_specific_info() const; |
| 42 | 43 |
| 43 private: | 44 private: |
| 44 enum Tag { | 45 enum Tag { |
| 45 kESDescrTag = 0x03, | 46 kESDescrTag = 0x03, |
| 46 kDecoderConfigDescrTag = 0x04, | 47 kDecoderConfigDescrTag = 0x04, |
| 47 kDecoderSpecificInfoTag = 0x05 | 48 kDecoderSpecificInfoTag = 0x05 |
| 48 }; | 49 }; |
| 49 | 50 |
| 50 bool ParseDecoderConfigDescriptor(BitReader* reader); | 51 bool ParseDecoderConfigDescriptor(BitReader* reader); |
| 51 bool ParseDecoderSpecificInfo(BitReader* reader); | 52 bool ParseDecoderSpecificInfo(BitReader* reader); |
| 52 | 53 |
| 53 uint8 object_type_; | 54 uint8_t object_type_; |
| 54 std::vector<uint8> decoder_specific_info_; | 55 std::vector<uint8_t> decoder_specific_info_; |
| 55 }; | 56 }; |
| 56 | 57 |
| 57 } // namespace mp4 | 58 } // namespace mp4 |
| 58 | 59 |
| 59 } // namespace media | 60 } // namespace media |
| 60 | 61 |
| 61 #endif // MEDIA_FORMATS_MP4_ES_DESCRIPTOR_H_ | 62 #endif // MEDIA_FORMATS_MP4_ES_DESCRIPTOR_H_ |
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