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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/base/audio_pull_fifo.h" | 5 #include "media/base/audio_pull_fifo.h" |
6 | 6 |
7 #include <algorithm> | 7 #include <algorithm> |
8 | 8 |
9 #include "base/logging.h" | 9 #include "base/logging.h" |
10 #include "media/base/audio_bus.h" | 10 #include "media/base/audio_bus.h" |
(...skipping 28 matching lines...) Expand all Loading... | |
39 // Try to fulfill the request using what's available in the FIFO. | 39 // Try to fulfill the request using what's available in the FIFO. |
40 frames_read = | 40 frames_read = |
41 ReadFromFifo(destination, remaining_frames_to_provide, write_pos); | 41 ReadFromFifo(destination, remaining_frames_to_provide, write_pos); |
42 write_pos += frames_read; | 42 write_pos += frames_read; |
43 remaining_frames_to_provide -= frames_read; | 43 remaining_frames_to_provide -= frames_read; |
44 } | 44 } |
45 } | 45 } |
46 | 46 |
47 void AudioPullFifo::Clear() { fifo_index_ = fifo_->frames(); } | 47 void AudioPullFifo::Clear() { fifo_index_ = fifo_->frames(); } |
48 | 48 |
49 int AudioPullFifo::SizeInFrames() { | |
tommi (sloooow) - chröme
2016/01/21 11:51:12
can this method be const?
Henrik Grunell
2016/01/21 12:26:16
Yep. Done.
| |
50 return fifo_->frames(); | |
51 } | |
52 | |
49 int AudioPullFifo::ReadFromFifo(AudioBus* destination, | 53 int AudioPullFifo::ReadFromFifo(AudioBus* destination, |
50 int frames_to_provide, | 54 int frames_to_provide, |
51 int write_pos) { | 55 int write_pos) { |
52 int frames = std::min(frames_to_provide, fifo_->frames() - fifo_index_); | 56 int frames = std::min(frames_to_provide, fifo_->frames() - fifo_index_); |
53 if (frames <= 0) | 57 if (frames <= 0) |
54 return 0; | 58 return 0; |
55 | 59 |
56 for (int ch = 0; ch < fifo_->channels(); ++ch) { | 60 for (int ch = 0; ch < fifo_->channels(); ++ch) { |
57 const float* src = fifo_->channel(ch) + fifo_index_; | 61 const float* src = fifo_->channel(ch) + fifo_index_; |
58 float* dest = destination->channel(ch) + write_pos; | 62 float* dest = destination->channel(ch) + write_pos; |
59 memcpy(dest, src, frames * sizeof(*src)); | 63 memcpy(dest, src, frames * sizeof(*src)); |
60 } | 64 } |
61 | 65 |
62 fifo_index_ += frames; | 66 fifo_index_ += frames; |
63 return frames; | 67 return frames; |
64 } | 68 } |
65 | 69 |
66 } // namespace media | 70 } // namespace media |
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