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Combine and simplify output_residual() and output_subframe_lpc().

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Originally committed as revision 24607 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2010-07-30 20:53:02 +00:00
parent fc001d6cc1
commit 6266cfb4ce
1 changed files with 21 additions and 37 deletions
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58
libavcodec/flacenc.c
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@ -1113,47 +1113,15 @@ static void output_subframe_verbatim(FlacEncodeContext *s, FlacSubframe *sub)
}
static void output_residual(FlacEncodeContext *s, FlacSubframe *sub)
{
int i, j, p, n, parts;
int k, porder, psize, res_cnt;
FlacFrame *frame;
int32_t *res;
frame = &s->frame;
res = sub->residual;
n = frame->blocksize;
/* rice-encoded block */
put_bits(&s->pb, 2, 0);
/* partition order */
porder = sub->rc.porder;
psize = n >> porder;
parts = (1 << porder);
put_bits(&s->pb, 4, porder);
res_cnt = psize - sub->order;
/* residual */
j = sub->order;
for (p = 0; p < parts; p++) {
k = sub->rc.params[p];
put_bits(&s->pb, 4, k);
if (p == 1)
res_cnt = psize;
for (i = 0; i < res_cnt && j < n; i++, j++)
set_sr_golomb_flac(&s->pb, res[j], k, INT32_MAX, 0);
}
}
static void output_subframe_lpc(FlacEncodeContext *s, FlacSubframe *sub)
{
int i;
int i, p, porder, psize;
int32_t *res, *part_end, *frame_end;
/* warm-up samples */
res = sub->residual;
for (i = 0; i < sub->order; i++)
put_sbits(&s->pb, sub->obits, sub->residual[i]);
put_sbits(&s->pb, sub->obits, *res++);
/* LPC coefficients */
if (sub->type == FLAC_SUBFRAME_LPC) {
@ -1164,8 +1132,24 @@ static void output_subframe_lpc(FlacEncodeContext *s, FlacSubframe *sub)
put_sbits(&s->pb, cbits, sub->coefs[i]);
}
/* rice-encoded block */
put_bits(&s->pb, 2, 0);
/* partition order */
porder = sub->rc.porder;
psize = s->frame.blocksize >> porder;
put_bits(&s->pb, 4, porder);
/* residual */
output_residual(s, sub);
part_end = &sub->residual[psize ];
frame_end = &sub->residual[s->frame.blocksize];
for (p = 0; p < 1 << porder; p++) {
int k = sub->rc.params[p];
put_bits(&s->pb, 4, k);
while (res < part_end)
set_sr_golomb_flac(&s->pb, *res++, k, INT32_MAX, 0);
part_end = FFMIN(frame_end, part_end + psize);
}
}