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SIMD optimization using float_to_int16_interleave.
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
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@ -790,6 +790,7 @@ static int wma_decode_frame(WMACodecContext *s, int16_t *samples)
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/* convert frame to integer */
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n = s->frame_len;
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incr = s->nb_channels;
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if (s->dsp.float_to_int16_interleave == ff_float_to_int16_interleave_c) {
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for(ch = 0; ch < s->nb_channels; ch++) {
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ptr = samples + ch;
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iptr = s->frame_out[ch];
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@ -802,6 +803,16 @@ static int wma_decode_frame(WMACodecContext *s, int16_t *samples)
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memmove(&s->frame_out[ch][0], &s->frame_out[ch][s->frame_len],
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s->frame_len * sizeof(float));
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}
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} else {
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float *output[MAX_CHANNELS];
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for (ch = 0; ch < MAX_CHANNELS; ch++)
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output[ch] = s->frame_out[ch];
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s->dsp.float_to_int16_interleave(samples, (const float **)output, n, incr);
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for(ch = 0; ch < incr; ch++) {
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/* prepare for next block */
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memmove(&s->frame_out[ch][0], &s->frame_out[ch][n], n * sizeof(float));
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}
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}
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#ifdef TRACE
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dump_shorts(s, "samples", samples, n * s->nb_channels);
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