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| author | Justin Ruggles <justin.ruggles@gmail.com> | 2011-08-07 17:47:42 -0400 |
|---|---|---|
| committer | Justin Ruggles <justin.ruggles@gmail.com> | 2011-09-05 10:09:44 -0400 |
| commit | ae264bb29be3506a489347c6e27a04cded0de621 (patch) | |
| tree | 4944f356bc2065d4b85dafd47e7418a719eee077 /libavcodec/ac3enc_float.c | |
| parent | a0d17b6d45b8550bd8826baa9f8eb4e1a596525a (diff) | |
| download | ffmpeg-ae264bb29be3506a489347c6e27a04cded0de621.tar.gz | |
ac3enc: Add channel coupling support for the fixed-point AC-3 encoder.
Update FATE references accordingly.
Diffstat (limited to 'libavcodec/ac3enc_float.c')
| -rw-r--r-- | libavcodec/ac3enc_float.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libavcodec/ac3enc_float.c b/libavcodec/ac3enc_float.c index 32ec558e70..598c69db1b 100644 --- a/libavcodec/ac3enc_float.c +++ b/libavcodec/ac3enc_float.c @@ -120,6 +120,18 @@ static void clip_coefficients(DSPContext *dsp, float *coef, unsigned int len) } +/** + * Calculate a single coupling coordinate. + */ +static CoefType calc_cpl_coord(CoefSumType energy_ch, CoefSumType energy_cpl) +{ + float coord = 0.125; + if (energy_cpl > 0) + coord *= sqrtf(energy_ch / energy_cpl); + return FFMIN(coord, COEF_MAX); +} + + #if CONFIG_AC3_ENCODER AVCodec ff_ac3_encoder = { .name = "ac3", |