diff options
Diffstat (limited to 'media/filters/audio_renderer_algorithm.cc')
| -rw-r--r-- | media/filters/audio_renderer_algorithm.cc | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/media/filters/audio_renderer_algorithm.cc b/media/filters/audio_renderer_algorithm.cc index e73ce65569..db65fe9950 100644 --- a/media/filters/audio_renderer_algorithm.cc +++ b/media/filters/audio_renderer_algorithm.cc @@ -46,12 +46,6 @@ namespace media { // |search_block_index_| = |search_block_center_offset_| - // |search_block_center_offset_|. -// Max/min supported playback rates for fast/slow audio. Audio outside of these -// ranges are muted. -// Audio at these speeds would sound better under a frequency domain algorithm. -static const float kMinPlaybackRate = 0.5f; -static const float kMaxPlaybackRate = 4.0f; - // Overlap-and-add window size in milliseconds. static const int kOlaWindowSizeMs = 20; @@ -76,8 +70,6 @@ AudioRendererAlgorithm::AudioRendererAlgorithm() : channels_(0), samples_per_second_(0), playback_rate_(0), - muted_(false), - muted_partial_frame_(0), capacity_(kStartingBufferSizeInFrames), output_time_(0.0), search_block_center_offset_(0), @@ -151,31 +143,6 @@ int AudioRendererAlgorithm::FillBuffer(AudioBus* dest, int requested_frames) { DCHECK_EQ(channels_, dest->channels()); - // Optimize the |muted_| case to issue a single clear instead of performing - // the full crossfade and clearing each crossfaded frame. - if (muted_) { - int frames_to_render = - std::min(static_cast<int>(audio_buffer_.frames() / playback_rate_), - requested_frames); - - // Compute accurate number of frames to actually skip in the source data. - // Includes the leftover partial frame from last request. However, we can - // only skip over complete frames, so a partial frame may remain for next - // time. - muted_partial_frame_ += frames_to_render * playback_rate_; - int seek_frames = static_cast<int>(muted_partial_frame_); - dest->ZeroFrames(frames_to_render); - audio_buffer_.SeekFrames(seek_frames); - - // Determine the partial frame that remains to be skipped for next call. If - // the user switches back to playing, it may be off time by this partial - // frame, which would be undetectable. If they subsequently switch to - // another playback rate that mutes, the code will attempt to line up the - // frames again. - muted_partial_frame_ -= seek_frames; - return frames_to_render; - } - int slower_step = ceil(ola_window_size_ * playback_rate_); int faster_step = ceil(ola_window_size_ / playback_rate_); @@ -200,8 +167,6 @@ int AudioRendererAlgorithm::FillBuffer(AudioBus* dest, int requested_frames) { void AudioRendererAlgorithm::SetPlaybackRate(float new_rate) { DCHECK_GE(new_rate, 0); playback_rate_ = new_rate; - muted_ = - playback_rate_ < kMinPlaybackRate || playback_rate_ > kMaxPlaybackRate; } void AudioRendererAlgorithm::FlushBuffers() { |