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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 #include "content/renderer/media/android/audio_decoder_android.h" | 5 #include "content/renderer/media/android/audio_decoder_android.h" |
6 | 6 |
7 #include <errno.h> | 7 #include <errno.h> |
8 #include <fcntl.h> | 8 #include <fcntl.h> |
9 #include <limits.h> | 9 #include <limits.h> |
| 10 #include <stdint.h> |
10 #include <sys/mman.h> | 11 #include <sys/mman.h> |
11 #include <unistd.h> | 12 #include <unistd.h> |
12 #include <vector> | 13 #include <vector> |
13 | 14 |
14 #include "base/file_descriptor_posix.h" | 15 #include "base/file_descriptor_posix.h" |
15 #include "base/logging.h" | 16 #include "base/logging.h" |
| 17 #include "base/macros.h" |
16 #include "base/memory/shared_memory.h" | 18 #include "base/memory/shared_memory.h" |
17 #include "base/posix/eintr_wrapper.h" | 19 #include "base/posix/eintr_wrapper.h" |
18 #include "base/process/process_handle.h" | 20 #include "base/process/process_handle.h" |
19 #include "content/common/view_messages.h" | 21 #include "content/common/view_messages.h" |
20 #include "media/base/android/webaudio_media_codec_info.h" | 22 #include "media/base/android/webaudio_media_codec_info.h" |
21 #include "media/base/audio_bus.h" | 23 #include "media/base/audio_bus.h" |
22 #include "media/base/limits.h" | 24 #include "media/base/limits.h" |
23 #include "third_party/WebKit/public/platform/WebAudioBus.h" | 25 #include "third_party/WebKit/public/platform/WebAudioBus.h" |
24 | 26 |
25 namespace content { | 27 namespace content { |
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99 const float kMinScale = -1.0f / std::numeric_limits<int16_t>::min(); | 101 const float kMinScale = -1.0f / std::numeric_limits<int16_t>::min(); |
100 | 102 |
101 return sample * (sample < 0 ? kMinScale : kMaxScale); | 103 return sample * (sample < 0 ? kMinScale : kMaxScale); |
102 } | 104 } |
103 | 105 |
104 // A basic WAVE file decoder. See | 106 // A basic WAVE file decoder. See |
105 // https://ccrma.stanford.edu/courses/422/projects/WaveFormat/ for a | 107 // https://ccrma.stanford.edu/courses/422/projects/WaveFormat/ for a |
106 // basic guide to the WAVE file format. | 108 // basic guide to the WAVE file format. |
107 class WAVEDecoder { | 109 class WAVEDecoder { |
108 public: | 110 public: |
109 WAVEDecoder(const uint8* data, size_t data_size); | 111 WAVEDecoder(const uint8_t* data, size_t data_size); |
110 ~WAVEDecoder(); | 112 ~WAVEDecoder(); |
111 | 113 |
112 // Try to decode the data as a WAVE file. If the data is a supported | 114 // Try to decode the data as a WAVE file. If the data is a supported |
113 // WAVE file, |destination_bus| is filled with the decoded data and | 115 // WAVE file, |destination_bus| is filled with the decoded data and |
114 // DecodeWAVEFile returns true. Otherwise, DecodeWAVEFile returns | 116 // DecodeWAVEFile returns true. Otherwise, DecodeWAVEFile returns |
115 // false. | 117 // false. |
116 bool DecodeWAVEFile(blink::WebAudioBus* destination_bus); | 118 bool DecodeWAVEFile(blink::WebAudioBus* destination_bus); |
117 | 119 |
118 private: | 120 private: |
119 // Minimum number of bytes in a WAVE file to hold all of the data we | 121 // Minimum number of bytes in a WAVE file to hold all of the data we |
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585 BufferAndCopyPcmDataToBus(input_fd, | 587 BufferAndCopyPcmDataToBus(input_fd, |
586 destination_bus, | 588 destination_bus, |
587 number_of_channels, | 589 number_of_channels, |
588 file_sample_rate); | 590 file_sample_rate); |
589 } | 591 } |
590 | 592 |
591 return true; | 593 return true; |
592 } | 594 } |
593 | 595 |
594 } // namespace content | 596 } // namespace content |
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