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For #1685: Cross build RTC with FFmpeg

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This commit is contained in:
winlin 2021-06-19 21:55:12 +08:00
parent 1c75a270b3
commit 1e9de0e191
267 changed files with 12603 additions and 1451 deletions
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53
trunk/3rdparty/ffmpeg-4-fit/libavcodec/opus_celt.c vendored
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@ -202,10 +202,40 @@ static void celt_postfilter_apply_transition(CeltBlock *block, float *data)
}
}
static void celt_postfilter_apply(CeltBlock *block, float *data, int len)
{
const int T = block->pf_period;
float g0, g1, g2;
float x0, x1, x2, x3, x4;
int i;
if (block->pf_gains[0] == 0.0 || len <= 0)
return;
g0 = block->pf_gains[0];
g1 = block->pf_gains[1];
g2 = block->pf_gains[2];
x4 = data[-T - 2];
x3 = data[-T - 1];
x2 = data[-T];
x1 = data[-T + 1];
for (i = 0; i < len; i++) {
x0 = data[i - T + 2];
data[i] += g0 * x2 +
g1 * (x1 + x3) +
g2 * (x0 + x4);
x4 = x3;
x3 = x2;
x2 = x1;
x1 = x0;
}
}
static void celt_postfilter(CeltFrame *f, CeltBlock *block)
{
int len = f->blocksize * f->blocks;
const int filter_len = len - 2 * CELT_OVERLAP;
celt_postfilter_apply_transition(block, block->buf + 1024);
@ -217,11 +247,8 @@ static void celt_postfilter(CeltFrame *f, CeltBlock *block)
if (len > CELT_OVERLAP) {
celt_postfilter_apply_transition(block, block->buf + 1024 + CELT_OVERLAP);
if (block->pf_gains[0] > FLT_EPSILON && filter_len > 0)
f->opusdsp.postfilter(block->buf + 1024 + 2 * CELT_OVERLAP,
block->pf_period, block->pf_gains,
filter_len);
celt_postfilter_apply(block, block->buf + 1024 + 2 * CELT_OVERLAP,
len - 2 * CELT_OVERLAP);
block->pf_period_old = block->pf_period;
memcpy(block->pf_gains_old, block->pf_gains, sizeof(block->pf_gains));
@ -435,6 +462,7 @@ int ff_celt_decode_frame(CeltFrame *f, OpusRangeCoder *rc,
/* transform and output for each output channel */
for (i = 0; i < f->output_channels; i++) {
CeltBlock *block = &f->block[i];
float m = block->emph_coeff;
/* iMDCT and overlap-add */
for (j = 0; j < f->blocks; j++) {
@ -452,10 +480,14 @@ int ff_celt_decode_frame(CeltFrame *f, OpusRangeCoder *rc,
/* postfilter */
celt_postfilter(f, block);
/* deemphasis */
block->emph_coeff = f->opusdsp.deemphasis(output[i],
&block->buf[1024 - frame_size],
block->emph_coeff, frame_size);
/* deemphasis and output scaling */
for (j = 0; j < frame_size; j++) {
const float tmp = block->buf[1024 - frame_size + j] + m;
m = tmp * CELT_EMPH_COEFF;
output[i][j] = tmp;
}
block->emph_coeff = m;
}
if (channels == 1)
@ -564,7 +596,6 @@ int ff_celt_init(AVCodecContext *avctx, CeltFrame **f, int output_channels,
goto fail;
}
ff_opus_dsp_init(&frm->opusdsp);
ff_celt_flush(frm);
*f = frm;