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Add mute state field to AudioFrame and switch some callers to use it. Also make AudioFrame::data_ private and instead provide:

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const int16_t* data() const;
int16_t* mutable_data();

- data() returns a zeroed static buffer on muted frames (to avoid unnecessary zeroing of the member buffer) and directly returns AudioFrame::data_ on unmuted frames.
- mutable_data(), lazily zeroes AudioFrame::data_ if the frame is currently muted, sets muted=false, and returns AudioFrame::data_.

These accessors serve to "force" callers to be aware of the mute state field, i.e. lazy zeroing is not the primary motivation.

This change only optimizes handling of muted frames where it is somewhat trivial to do so. Other improvements requiring more significant structural changes will come later.

BUG=webrtc:7343
TBR=henrika

Review-Url: https://codereview.webrtc.org/2750783004
Cr-Commit-Position: refs/heads/master@{#18543}
This commit is contained in:
yujo
2017-06-12 12:45:32 -07:00
committed by Commit Bot
parent 0703856b53
commit 36b1a5fcec
55 changed files with 658 additions and 316 deletions
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4
webrtc/modules/audio_coding/test/PCMFile.h
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@ -33,8 +33,8 @@ class PCMFile {
int32_t Read10MsData(AudioFrame& audio_frame);
void Write10MsData(int16_t *playout_buffer, size_t length_smpls);
void Write10MsData(AudioFrame& audio_frame);
void Write10MsData(const int16_t *playout_buffer, size_t length_smpls);
void Write10MsData(const AudioFrame& audio_frame);
uint16_t PayloadLength10Ms() const;
int32_t SamplingFrequency() const;