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Add new fast mode for NetEq's Accelerate operation

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This change instroduces a mode where the Accelerate operation will be
more aggressive. When enabled, it will allow acceleration at lower
correlation levels, and possibly remove multiple pitch periods at
once.

The feature is enabled through NetEq::Config, and is off by
default. This means that bit-exactness tests are currently not
affected.

A unit test was added for the Accelerate class, with and without fast
mode enabled.

BUG=4691
R=minyue@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/50039004

Cr-Commit-Position: refs/heads/master@{#9295}
This commit is contained in:
Henrik Lundin
2015-05-27 14:33:29 +02:00
parent cbe408aa11
commit cf808d2366
13 changed files with 172 additions and 58 deletions
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4
webrtc/modules/audio_coding/neteq/neteq_impl.h
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@ -278,7 +278,8 @@ class NetEqImpl : public webrtc::NetEq {
int DoAccelerate(int16_t* decoded_buffer,
size_t decoded_length,
AudioDecoder::SpeechType speech_type,
bool play_dtmf) EXCLUSIVE_LOCKS_REQUIRED(crit_sect_);
bool play_dtmf,
bool fast_accelerate) EXCLUSIVE_LOCKS_REQUIRED(crit_sect_);
// Sub-method which calls the PreemptiveExpand class to perform the
// preemtive expand operation.
@ -392,6 +393,7 @@ class NetEqImpl : public webrtc::NetEq {
int decoder_error_code_ GUARDED_BY(crit_sect_);
const BackgroundNoiseMode background_noise_mode_ GUARDED_BY(crit_sect_);
NetEqPlayoutMode playout_mode_ GUARDED_BY(crit_sect_);
bool enable_fast_accelerate_ GUARDED_BY(crit_sect_);
// These values are used by NACK module to estimate time-to-play of
// a missing packet. Occasionally, NetEq might decide to decode more