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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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/audio/win/waveout_output_win.h" | 5 #include "media/audio/win/waveout_output_win.h" |
6 | 6 |
7 #include <windows.h> | 7 #include <windows.h> |
8 #include <mmsystem.h> | 8 #include <mmsystem.h> |
9 #pragma comment(lib, "winmm.lib") | 9 #pragma comment(lib, "winmm.lib") |
10 | 10 |
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339 void PCMWaveOutAudioOutputStream::QueueNextPacket(WAVEHDR *buffer) { | 339 void PCMWaveOutAudioOutputStream::QueueNextPacket(WAVEHDR *buffer) { |
340 // Call the source which will fill our buffer with pleasant sounds and | 340 // Call the source which will fill our buffer with pleasant sounds and |
341 // return to us how many bytes were used. | 341 // return to us how many bytes were used. |
342 // If we are down sampling to a smaller number of channels, we need to | 342 // If we are down sampling to a smaller number of channels, we need to |
343 // scale up the amount of pending bytes. | 343 // scale up the amount of pending bytes. |
344 // TODO(fbarchard): Handle used 0 by queueing more. | 344 // TODO(fbarchard): Handle used 0 by queueing more. |
345 uint32 scaled_pending_bytes = pending_bytes_ * channels_ / | 345 uint32 scaled_pending_bytes = pending_bytes_ * channels_ / |
346 format_.Format.nChannels; | 346 format_.Format.nChannels; |
347 // TODO(sergeyu): Specify correct hardware delay for AudioBuffersState. | 347 // TODO(sergeyu): Specify correct hardware delay for AudioBuffersState. |
348 uint32 used = callback_->OnMoreData( | 348 uint32 used = callback_->OnMoreData( |
349 this, reinterpret_cast<uint8*>(buffer->lpData), buffer_size_, | 349 reinterpret_cast<uint8*>(buffer->lpData), buffer_size_, |
350 AudioBuffersState(scaled_pending_bytes, 0)); | 350 AudioBuffersState(scaled_pending_bytes, 0)); |
351 if (used <= buffer_size_) { | 351 if (used <= buffer_size_) { |
352 buffer->dwBufferLength = used * format_.Format.nChannels / channels_; | 352 buffer->dwBufferLength = used * format_.Format.nChannels / channels_; |
353 if (channels_ > 2 && format_.Format.nChannels == 2) { | 353 if (channels_ > 2 && format_.Format.nChannels == 2) { |
354 media::FoldChannels(buffer->lpData, used, | 354 media::FoldChannels(buffer->lpData, used, |
355 channels_, format_.Format.wBitsPerSample >> 3, | 355 channels_, format_.Format.wBitsPerSample >> 3, |
356 volume_); | 356 volume_); |
357 } else { | 357 } else { |
358 media::AdjustVolume(buffer->lpData, used, | 358 media::AdjustVolume(buffer->lpData, used, |
359 format_.Format.nChannels, | 359 format_.Format.nChannels, |
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408 buffer, | 408 buffer, |
409 sizeof(WAVEHDR)); | 409 sizeof(WAVEHDR)); |
410 if (result != MMSYSERR_NOERROR) | 410 if (result != MMSYSERR_NOERROR) |
411 stream->HandleError(result); | 411 stream->HandleError(result); |
412 stream->pending_bytes_ += buffer->dwBufferLength; | 412 stream->pending_bytes_ += buffer->dwBufferLength; |
413 } | 413 } |
414 } | 414 } |
415 } | 415 } |
416 | 416 |
417 } // namespace media | 417 } // namespace media |
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