eden-emu/opus
15
0
Fork 0
mirror of https://github.com/xiph/opus.git synced 2025-05-28 22:29:14 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 4

Moves mono downmixing and upsampling to the compute_mdcts()

Browse source
This commit is contained in:
Jean-Marc Valin 2013-02-18 01:43:43 -05:00
parent 541a472ff6
commit 851f8033f6
1 changed files with 23 additions and 56 deletions
Download patch file Download diff file Expand all files Collapse all files

79
celt/celt_encoder.c
View file

@ -399,13 +399,14 @@ int patch_transient_decision(opus_val16 *new, opus_val16 *old, int nbEBands,
/** Apply window and compute the MDCT for all sub-frames and
all channels in a frame */
static void compute_mdcts(const CELTMode *mode, int shortBlocks, celt_sig * OPUS_RESTRICT in, celt_sig * OPUS_RESTRICT out, int C, int LM)
static void compute_mdcts(const CELTMode *mode, int shortBlocks, celt_sig * OPUS_RESTRICT in,
celt_sig * OPUS_RESTRICT out, int C, int CC, int LM, int upsample)
{
const int overlap = OVERLAP(mode);
int N;
int B;
int shift;
int b, c;
int i, b, c;
if (shortBlocks)
{
B = shortBlocks;
@ -422,7 +423,23 @@ static void compute_mdcts(const CELTMode *mode, int shortBlocks, celt_sig * OPUS
/* Interleaving the sub-frames while doing the MDCTs */
clt_mdct_forward(&mode->mdct, in+c*(B*N+overlap)+b*N, &out[b+c*N*B], mode->window, overlap, shift, B);
}
} while (++c<C);
} while (++c<CC);
if (CC==2&&C==1)
{
for (i=0;i<B*N;i++)
out[i] = ADD32(HALF32(out[i]), HALF32(out[B*N+i]));
}
if (upsample != 1)
{
c=0; do
{
int bound = B*N/upsample;
for (i=0;i<bound;i++)
out[c*B*N+i] *= upsample;
for (;i<B*N;i++)
out[c*B*N+i] = 0;
} while (++c<C);
}
}
@ -1355,48 +1372,14 @@ int celt_encode_with_ec(CELTEncoder * OPUS_RESTRICT st, const opus_val16 * pcm,
ALLOC(bandLogE2, C*nbEBands, opus_val16);
if (secondMdct)
{
compute_mdcts(mode, 0, in, freq, CC, LM);
if (CC==2&&C==1)
{
for (i=0;i<N;i++)
freq[i] = ADD32(HALF32(freq[i]), HALF32(freq[N+i]));
}
if (st->upsample != 1)
{
c=0; do
{
int bound = N/st->upsample;
for (i=0;i<bound;i++)
freq[c*N+i] *= st->upsample;
for (;i<N;i++)
freq[c*N+i] = 0;
} while (++c<C);
}
compute_mdcts(mode, 0, in, freq, C, CC, LM, st->upsample);
compute_band_energies(mode, freq, bandE, effEnd, C, M);
amp2Log2(mode, effEnd, st->end, bandE, bandLogE2, C);
for (i=0;i<C*nbEBands;i++)
bandLogE2[i] += HALF16(SHL16(LM, DB_SHIFT));
}
compute_mdcts(mode, shortBlocks, in, freq, CC, LM);
if (CC==2&&C==1)
{
for (i=0;i<N;i++)
freq[i] = ADD32(HALF32(freq[i]), HALF32(freq[N+i]));
tf_chan = 0;
}
if (st->upsample != 1)
{
c=0; do
{
int bound = N/st->upsample;
for (i=0;i<bound;i++)
freq[c*N+i] *= st->upsample;
for (;i<N;i++)
freq[c*N+i] = 0;
} while (++c<C);
}
compute_mdcts(mode, shortBlocks, in, freq, C, CC, LM, st->upsample);
compute_band_energies(mode, freq, bandE, effEnd, C, M);
amp2Log2(mode, effEnd, st->end, bandE, bandLogE, C);
@ -1418,23 +1401,7 @@ int celt_encode_with_ec(CELTEncoder * OPUS_RESTRICT st, const opus_val16 * pcm,
{
isTransient = 1;
shortBlocks = M;
compute_mdcts(mode, shortBlocks, in, freq, CC, LM);
if (CC==2&&C==1)
{
for (i=0;i<N;i++)
freq[i] = ADD32(HALF32(freq[i]), HALF32(freq[N+i]));
}
if (st->upsample != 1)
{
c=0; do
{
int bound = N/st->upsample;
for (i=0;i<bound;i++)
freq[c*N+i] *= st->upsample;
for (;i<N;i++)
freq[c*N+i] = 0;
} while (++c<C);
}
compute_mdcts(mode, shortBlocks, in, freq, C, CC, LM, st->upsample);
compute_band_energies(mode, freq, bandE, effEnd, C, M);
amp2Log2(mode, effEnd, st->end, bandE, bandLogE, C);
/* Compensate for the scaling of short vs long mdcts */