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Code Issues Releases Activity

Cleanup apply_window_and_mdct().

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Originally committed as revision 23495 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Alex Converse 2010-06-05 19:41:52 +00:00
parent b8c2c41d66
commit 614842a93d
1 changed files with 5 additions and 10 deletions
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15
libavcodec/aacenc.c
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@ -234,25 +234,21 @@ static void apply_window_and_mdct(AVCodecContext *avctx, AACEncContext *s,
s->output[i] = sce->saved[i];
}
if (sce->ics.window_sequence[0] != LONG_START_SEQUENCE) {
j = channel;
for (i = 0; i < 1024; i++, j += avctx->channels) {
for (i = 0, j = channel; i < 1024; i++, j += avctx->channels) {
s->output[i+1024] = audio[j] * lwindow[1024 - i - 1];
sce->saved[i] = audio[j] * lwindow[i];
}
} else {
j = channel;
for (i = 0; i < 448; i++, j += avctx->channels)
for (i = 0, j = channel; i < 448; i++, j += avctx->channels)
s->output[i+1024] = audio[j];
for (i = 448; i < 576; i++, j += avctx->channels)
for (; i < 576; i++, j += avctx->channels)
s->output[i+1024] = audio[j] * swindow[576 - i - 1];
memset(s->output+1024+576, 0, sizeof(s->output[0]) * 448);
j = channel;
for (i = 0; i < 1024; i++, j += avctx->channels)
for (i = 0, j = channel; i < 1024; i++, j += avctx->channels)
sce->saved[i] = audio[j];
}
ff_mdct_calc(&s->mdct1024, sce->coeffs, s->output);
} else {
j = channel;
for (k = 0; k < 1024; k += 128) {
for (i = 448 + k; i < 448 + k + 256; i++)
s->output[i - 448 - k] = (i < 1024)
@ -262,8 +258,7 @@ static void apply_window_and_mdct(AVCodecContext *avctx, AACEncContext *s,
s->dsp.vector_fmul_reverse(s->output+128, s->output+128, swindow, 128);
ff_mdct_calc(&s->mdct128, sce->coeffs + k, s->output);
}
j = channel;
for (i = 0; i < 1024; i++, j += avctx->channels)
for (i = 0, j = channel; i < 1024; i++, j += avctx->channels)
sce->saved[i] = audio[j];
}
}