From ae264bb29be3506a489347c6e27a04cded0de621 Mon Sep 17 00:00:00 2001 From: Justin Ruggles Date: Sun, 7 Aug 2011 17:47:42 -0400 Subject: ac3enc: Add channel coupling support for the fixed-point AC-3 encoder. Update FATE references accordingly. --- libavcodec/ac3enc_float.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'libavcodec/ac3enc_float.c') 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", -- cgit v1.2.3