mirror of https://git.ffmpeg.org/ffmpeg.git
Use memcpy() instead of a for loop in mdct512().
8% faster in function. Originally committed as revision 26027 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -339,8 +339,7 @@ static void mdct512(int32_t *out, int16_t *in)
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/* shift to simplify computations */
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for (i = 0; i < MDCT_SAMPLES/4; i++)
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rot[i] = -in[i + 3*MDCT_SAMPLES/4];
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for (;i < MDCT_SAMPLES; i++)
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rot[i] = in[i - MDCT_SAMPLES/4];
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memcpy(&rot[MDCT_SAMPLES/4], &in[0], 3*MDCT_SAMPLES/4*sizeof(*in));
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/* pre rotation */
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for (i = 0; i < MDCT_SAMPLES/4; i++) {
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