From f7813a5324be39d13ab536c245d15dfc602a7849 Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Sun, 29 Dec 2013 12:19:38 +0000 Subject: basic type mechanism working --- ffmpeg/libavcodec/ac3dsp.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'ffmpeg/libavcodec/ac3dsp.c') diff --git a/ffmpeg/libavcodec/ac3dsp.c b/ffmpeg/libavcodec/ac3dsp.c index 6df3a68..feda6dd 100644 --- a/ffmpeg/libavcodec/ac3dsp.c +++ b/ffmpeg/libavcodec/ac3dsp.c @@ -239,6 +239,19 @@ static void ac3_downmix_c(float **samples, float (*matrix)[2], } } +static void apply_window_int16_c(int16_t *output, const int16_t *input, + const int16_t *window, unsigned int len) +{ + int i; + int len2 = len >> 1; + + for (i = 0; i < len2; i++) { + int16_t w = window[i]; + output[i] = (MUL16(input[i], w) + (1 << 14)) >> 15; + output[len-i-1] = (MUL16(input[len-i-1], w) + (1 << 14)) >> 15; + } +} + av_cold void ff_ac3dsp_init(AC3DSPContext *c, int bit_exact) { c->ac3_exponent_min = ac3_exponent_min_c; @@ -253,6 +266,7 @@ av_cold void ff_ac3dsp_init(AC3DSPContext *c, int bit_exact) c->sum_square_butterfly_int32 = ac3_sum_square_butterfly_int32_c; c->sum_square_butterfly_float = ac3_sum_square_butterfly_float_c; c->downmix = ac3_downmix_c; + c->apply_window_int16 = apply_window_int16_c; if (ARCH_ARM) ff_ac3dsp_init_arm(c, bit_exact); -- cgit v1.2.3