Commit b35c67e5 authored by Justin Ruggles's avatar Justin Ruggles

pass an AC3DecodeContext to ac3_downmix() instead of multiple arguments

Originally committed as revision 11359 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 866181e5
......@@ -735,27 +735,26 @@ static inline void do_imdct(AC3DecodeContext *s)
/**
* Downmix the output to mono or stereo.
*/
static void ac3_downmix(float samples[AC3_MAX_CHANNELS][256], int fbw_channels,
int output_mode, float coef[AC3_MAX_CHANNELS][2])
static void ac3_downmix(AC3DecodeContext *s)
{
int i, j;
float v0, v1, s0, s1;
for(i=0; i<256; i++) {
v0 = v1 = s0 = s1 = 0.0f;
for(j=0; j<fbw_channels; j++) {
v0 += samples[j][i] * coef[j][0];
v1 += samples[j][i] * coef[j][1];
s0 += coef[j][0];
s1 += coef[j][1];
for(j=0; j<s->fbw_channels; j++) {
v0 += s->output[j][i] * s->downmix_coeffs[j][0];
v1 += s->output[j][i] * s->downmix_coeffs[j][1];
s0 += s->downmix_coeffs[j][0];
s1 += s->downmix_coeffs[j][1];
}
v0 /= s0;
v1 /= s1;
if(output_mode == AC3_CHMODE_MONO) {
samples[0][i] = (v0 + v1) * LEVEL_MINUS_3DB;
} else if(output_mode == AC3_CHMODE_STEREO) {
samples[0][i] = v0;
samples[1][i] = v1;
if(s->output_mode == AC3_CHMODE_MONO) {
s->output[0][i] = (v0 + v1) * LEVEL_MINUS_3DB;
} else if(s->output_mode == AC3_CHMODE_STEREO) {
s->output[0][i] = v0;
s->output[1][i] = v1;
}
}
}
......@@ -1053,8 +1052,7 @@ static int ac3_parse_audio_block(AC3DecodeContext *s, int blk)
/* downmix output if needed */
if(s->channels != s->out_channels && !((s->output_mode & AC3_OUTPUT_LFEON) &&
s->fbw_channels == s->out_channels)) {
ac3_downmix(s->output, s->fbw_channels, s->output_mode,
s->downmix_coeffs);
ac3_downmix(s);
}
/* convert float to 16-bit integer */
......
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