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SIMD optimization using float_to_int16_interleave.

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Patch by Zhou Zongyi, zhouzy A os D pku D edu D cn

Originally committed as revision 22414 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Zhou Zongyi 2010-03-09 23:35:57 +00:00 committed by Carl Eugen Hoyos
parent 6ebc724060
commit d00261a34b
1 changed files with 11 additions and 0 deletions
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11
libavcodec/wmadec.c
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@ -790,6 +790,7 @@ static int wma_decode_frame(WMACodecContext *s, int16_t *samples)
/* convert frame to integer */
n = s->frame_len;
incr = s->nb_channels;
if (s->dsp.float_to_int16_interleave == ff_float_to_int16_interleave_c) {
for(ch = 0; ch < s->nb_channels; ch++) {
ptr = samples + ch;
iptr = s->frame_out[ch];
@ -802,6 +803,16 @@ static int wma_decode_frame(WMACodecContext *s, int16_t *samples)
memmove(&s->frame_out[ch][0], &s->frame_out[ch][s->frame_len],
s->frame_len * sizeof(float));
}
} else {
float *output[MAX_CHANNELS];
for (ch = 0; ch < MAX_CHANNELS; ch++)
output[ch] = s->frame_out[ch];
s->dsp.float_to_int16_interleave(samples, (const float **)output, n, incr);
for(ch = 0; ch < incr; ch++) {
/* prepare for next block */
memmove(&s->frame_out[ch][0], &s->frame_out[ch][n], n * sizeof(float));
}
}
#ifdef TRACE
dump_shorts(s, "samples", samples, n * s->nb_channels);