diff options
| author | Koen Vos <koenvos@users.noreply.github.com> | 2016-02-19 11:11:20 +0800 |
|---|---|---|
| committer | Jean-Marc Valin <jmvalin@jmvalin.ca> | 2016-07-17 15:05:55 -0400 |
| commit | 6adea4b93ce15b5c6eab1be29da6e01806ee8853 (patch) | |
| tree | 3e3ad14bd7563a834328240b9c0e07c0de6c785a /silk/float | |
| parent | fc7ce7d588afcd6c537e5063171156c9cbf16445 (diff) | |
| download | opus-6adea4b93ce15b5c6eab1be29da6e01806ee8853.tar.gz | |
pitch analysis (in FIX) now scales the input down at the start, instead of at every stage
Diffstat (limited to 'silk/float')
| -rw-r--r-- | silk/float/pitch_analysis_core_FLP.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/silk/float/pitch_analysis_core_FLP.c b/silk/float/pitch_analysis_core_FLP.c index d0e637a2..fc47c6ef 100644 --- a/silk/float/pitch_analysis_core_FLP.c +++ b/silk/float/pitch_analysis_core_FLP.c @@ -158,9 +158,16 @@ opus_int silk_pitch_analysis_core_FLP( /* O Voicing estimate: 0 voiced, silk_short2float_array( frame_4kHz, frame_4_FIX, frame_length_4kHz ); /* Low-pass filter */ - for( i = frame_length_4kHz - 1; i > 0; i-- ) { - frame_4kHz[ i ] += frame_4kHz[ i - 1 ]; + silk_assert( (frame_length_4kHz & 3) == 0 ); + for( i = frame_length_4kHz - 1; i > 4; i -= 4 ) { + frame_4kHz[ i - 0 ] = silk_ADD_SAT16( frame_4kHz[ i - 0 ], frame_4kHz[ i - 1 ] ); + frame_4kHz[ i - 1 ] = silk_ADD_SAT16( frame_4kHz[ i - 1 ], frame_4kHz[ i - 2 ] ); + frame_4kHz[ i - 2 ] = silk_ADD_SAT16( frame_4kHz[ i - 2 ], frame_4kHz[ i - 3 ] ); + frame_4kHz[ i - 3 ] = silk_ADD_SAT16( frame_4kHz[ i - 3 ], frame_4kHz[ i - 4 ] ); } + frame_4kHz[ i - 0 ] = silk_ADD_SAT16( frame_4kHz[ i - 0 ], frame_4kHz[ i - 1 ] ); + frame_4kHz[ i - 1 ] = silk_ADD_SAT16( frame_4kHz[ i - 1 ], frame_4kHz[ i - 2 ] ); + frame_4kHz[ i - 2 ] = silk_ADD_SAT16( frame_4kHz[ i - 2 ], frame_4kHz[ i - 3 ] ); /****************************************************************************** * FIRST STAGE, operating in 4 khz |