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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 #include "media/cast/sender/audio_encoder.h" | 5 #include "media/cast/sender/audio_encoder.h" |
6 | 6 |
7 #include <stdint.h> | 7 #include <stdint.h> |
8 | 8 |
9 #include <algorithm> | 9 #include <algorithm> |
10 #include <limits> | 10 #include <limits> |
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274 OPUS_OK); | 274 OPUS_OK); |
275 } | 275 } |
276 | 276 |
277 private: | 277 private: |
278 ~OpusImpl() final {} | 278 ~OpusImpl() final {} |
279 | 279 |
280 void TransferSamplesIntoBuffer(const AudioBus* audio_bus, | 280 void TransferSamplesIntoBuffer(const AudioBus* audio_bus, |
281 int source_offset, | 281 int source_offset, |
282 int buffer_fill_offset, | 282 int buffer_fill_offset, |
283 int num_samples) final { | 283 int num_samples) final { |
284 DCHECK_EQ(audio_bus->channels(), num_channels_); | |
284 // Opus requires channel-interleaved samples in a single array. | 285 // Opus requires channel-interleaved samples in a single array. |
miu
2016/06/02 20:40:21
nit: You can remove this comment now. The call to
chfremer
2016/06/07 21:21:39
Done.
| |
285 for (int ch = 0; ch < audio_bus->channels(); ++ch) { | 286 audio_bus->ToInterleavedFloat(source_offset, |
286 const float* src = audio_bus->channel(ch) + source_offset; | 287 buffer_fill_offset * num_channels_, |
287 const float* const src_end = src + num_samples; | 288 num_samples, buffer_.get()); |
288 float* dest = buffer_.get() + buffer_fill_offset * num_channels_ + ch; | |
289 for (; src < src_end; ++src, dest += num_channels_) | |
290 *dest = *src; | |
291 } | |
292 } | 289 } |
293 | 290 |
294 bool EncodeFromFilledBuffer(std::string* out) final { | 291 bool EncodeFromFilledBuffer(std::string* out) final { |
295 out->resize(kOpusMaxPayloadSize); | 292 out->resize(kOpusMaxPayloadSize); |
296 const opus_int32 result = opus_encode_float( | 293 const opus_int32 result = opus_encode_float( |
297 opus_encoder_, buffer_.get(), samples_per_frame_, | 294 opus_encoder_, buffer_.get(), samples_per_frame_, |
298 reinterpret_cast<uint8_t*>(string_as_array(out)), kOpusMaxPayloadSize); | 295 reinterpret_cast<uint8_t*>(string_as_array(out)), kOpusMaxPayloadSize); |
299 if (result > 1) { | 296 if (result > 1) { |
300 out->resize(result); | 297 out->resize(result); |
301 return true; | 298 return true; |
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838 cast_environment_->PostTask(CastEnvironment::AUDIO, | 835 cast_environment_->PostTask(CastEnvironment::AUDIO, |
839 FROM_HERE, | 836 FROM_HERE, |
840 base::Bind(&AudioEncoder::ImplBase::EncodeAudio, | 837 base::Bind(&AudioEncoder::ImplBase::EncodeAudio, |
841 impl_, | 838 impl_, |
842 base::Passed(&audio_bus), | 839 base::Passed(&audio_bus), |
843 recorded_time)); | 840 recorded_time)); |
844 } | 841 } |
845 | 842 |
846 } // namespace cast | 843 } // namespace cast |
847 } // namespace media | 844 } // namespace media |
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