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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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 "webkit/media/audio_decoder.h" | 5 #include "webkit/media/audio_decoder.h" |
| 6 | 6 |
| 7 #include <vector> | 7 #include <vector> |
| 8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
| 9 #include "base/string_util.h" | 9 #include "base/string_util.h" |
| 10 #include "base/time.h" | 10 #include "base/time.h" |
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| 37 return false; | 37 return false; |
| 38 | 38 |
| 39 size_t number_of_channels = reader.channels(); | 39 size_t number_of_channels = reader.channels(); |
| 40 double file_sample_rate = reader.sample_rate(); | 40 double file_sample_rate = reader.sample_rate(); |
| 41 double duration = reader.duration().InSecondsF(); | 41 double duration = reader.duration().InSecondsF(); |
| 42 size_t number_of_frames = static_cast<size_t>(reader.number_of_frames()); | 42 size_t number_of_frames = static_cast<size_t>(reader.number_of_frames()); |
| 43 | 43 |
| 44 // Apply sanity checks to make sure crazy values aren't coming out of | 44 // Apply sanity checks to make sure crazy values aren't coming out of |
| 45 // FFmpeg. | 45 // FFmpeg. |
| 46 if (!number_of_channels || | 46 if (!number_of_channels || |
| 47 number_of_channels > static_cast<size_t>(media::Limits::kMaxChannels) || | 47 number_of_channels > static_cast<size_t>(media::limits::kMaxChannels) || |
| 48 file_sample_rate < media::Limits::kMinSampleRate || | 48 file_sample_rate < media::limits::kMinSampleRate || |
| 49 file_sample_rate > media::Limits::kMaxSampleRate) | 49 file_sample_rate > media::limits::kMaxSampleRate) |
| 50 return false; | 50 return false; |
| 51 | 51 |
| 52 // TODO(crogers) : do sample-rate conversion with FFmpeg. | 52 // TODO(crogers) : do sample-rate conversion with FFmpeg. |
| 53 // For now, we're ignoring the requested 'sample_rate' and returning | 53 // For now, we're ignoring the requested 'sample_rate' and returning |
| 54 // the WebAudioBus at the file's sample-rate. | 54 // the WebAudioBus at the file's sample-rate. |
| 55 // double destination_sample_rate = | 55 // double destination_sample_rate = |
| 56 // (sample_rate != 0.0) ? sample_rate : file_sample_rate; | 56 // (sample_rate != 0.0) ? sample_rate : file_sample_rate; |
| 57 double destination_sample_rate = file_sample_rate; | 57 double destination_sample_rate = file_sample_rate; |
| 58 | 58 |
| 59 DLOG(INFO) << "Decoding file data -" | 59 DLOG(INFO) << "Decoding file data -" |
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| 78 audio_data.reserve(number_of_channels); | 78 audio_data.reserve(number_of_channels); |
| 79 for (size_t i = 0; i < number_of_channels; ++i) { | 79 for (size_t i = 0; i < number_of_channels; ++i) { |
| 80 audio_data.push_back(destination_bus->channelData(i)); | 80 audio_data.push_back(destination_bus->channelData(i)); |
| 81 } | 81 } |
| 82 | 82 |
| 83 // Decode the audio file data. | 83 // Decode the audio file data. |
| 84 return reader.Read(audio_data, number_of_frames); | 84 return reader.Read(audio_data, number_of_frames); |
| 85 } | 85 } |
| 86 | 86 |
| 87 } // namespace webkit_media | 87 } // namespace webkit_media |
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