mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
opus_pvq: minor cleanups
Removes unneeded variables, renames confusing and innacurate variables and rewrites and slightly optimizes hadamard interleave/deinterleave functions. Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
This commit is contained in:
Rostislav Pehlivanov
parent
8de3458a07
commit
4d59de3991
@ -33,7 +33,7 @@ static inline int16_t celt_cos(int16_t x)
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{
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x = (MUL16(x, x) + 4096) >> 13;
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x = (32767-x) + ROUND_MUL16(x, (-7651 + ROUND_MUL16(x, (8277 + ROUND_MUL16(-626, x)))));
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return 1+x;
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return x + 1;
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}
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static inline int celt_log2tan(int isin, int icos)
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@ -163,7 +163,7 @@ static inline uint32_t celt_extract_collapse_mask(const int *iy, uint32_t N, uin
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collapse_mask = 0;
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for (i = 0; i < B; i++)
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for (j = 0; j < N0; j++)
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collapse_mask |= (iy[i*N0+j]!=0)<<i;
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collapse_mask |= (!!iy[i*N0+j]) << i;
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return collapse_mask;
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}
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@ -173,7 +173,7 @@ static inline void celt_stereo_merge(float *X, float *Y, float mid, int N)
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float xp = 0, side = 0;
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float E[2];
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float mid2;
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float t, gain[2];
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float gain[2];
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/* Compute the norm of X+Y and X-Y as |X|^2 + |Y|^2 +/- sum(xy) */
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for (i = 0; i < N; i++) {
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@ -192,10 +192,8 @@ static inline void celt_stereo_merge(float *X, float *Y, float mid, int N)
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return;
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}
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t = E[0];
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gain[0] = 1.0f / sqrtf(t);
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t = E[1];
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gain[1] = 1.0f / sqrtf(t);
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gain[0] = 1.0f / sqrtf(E[0]);
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gain[1] = 1.0f / sqrtf(E[1]);
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for (i = 0; i < N; i++) {
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float value[2];
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@ -210,43 +208,27 @@ static inline void celt_stereo_merge(float *X, float *Y, float mid, int N)
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static void celt_interleave_hadamard(float *tmp, float *X, int N0,
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int stride, int hadamard)
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{
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int i, j;
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int N = N0*stride;
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int i, j, N = N0*stride;
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const uint8_t *order = &ff_celt_hadamard_order[hadamard ? stride - 2 : 30];
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if (hadamard) {
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const uint8_t *ordery = ff_celt_hadamard_ordery + stride - 2;
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for (i = 0; i < stride; i++)
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for (j = 0; j < N0; j++)
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tmp[j*stride+i] = X[ordery[i]*N0+j];
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} else {
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for (i = 0; i < stride; i++)
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for (j = 0; j < N0; j++)
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tmp[j*stride+i] = X[i*N0+j];
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}
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for (i = 0; i < stride; i++)
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for (j = 0; j < N0; j++)
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tmp[j*stride+i] = X[order[i]*N0+j];
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for (i = 0; i < N; i++)
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X[i] = tmp[i];
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memcpy(X, tmp, N*sizeof(float));
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}
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static void celt_deinterleave_hadamard(float *tmp, float *X, int N0,
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int stride, int hadamard)
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{
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int i, j;
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int N = N0*stride;
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int i, j, N = N0*stride;
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const uint8_t *order = &ff_celt_hadamard_order[hadamard ? stride - 2 : 30];
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if (hadamard) {
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const uint8_t *ordery = ff_celt_hadamard_ordery + stride - 2;
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for (i = 0; i < stride; i++)
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for (j = 0; j < N0; j++)
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tmp[ordery[i]*N0+j] = X[j*stride+i];
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} else {
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for (i = 0; i < stride; i++)
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for (j = 0; j < N0; j++)
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tmp[i*N0+j] = X[j*stride+i];
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}
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for (i = 0; i < stride; i++)
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for (j = 0; j < N0; j++)
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tmp[order[i]*N0+j] = X[j*stride+i];
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for (i = 0; i < N; i++)
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X[i] = tmp[i];
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memcpy(X, tmp, N*sizeof(float));
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}
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static void celt_haar1(float *X, int N0, int stride)
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@ -264,11 +246,11 @@ static void celt_haar1(float *X, int N0, int stride)
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}
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static inline int celt_compute_qn(int N, int b, int offset, int pulse_cap,
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int dualstereo)
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int stereo)
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{
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int qn, qb;
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int N2 = 2 * N - 1;
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if (dualstereo && N == 2)
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if (stereo && N == 2)
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N2--;
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/* The upper limit ensures that in a stereo split with itheta==16384, we'll
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@ -471,12 +453,13 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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float *lowband, int duration, float *lowband_out, int level,
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float gain, float *lowband_scratch, int fill)
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{
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int i;
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const uint8_t *cache;
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int dualstereo, split;
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int stereo = !!Y, split = !!Y;
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int imid = 0, iside = 0;
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uint32_t N0 = N;
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int N_B;
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int N_B0;
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int N_B = N / blocks;
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int N_B0 = N_B;
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int B0 = blocks;
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int time_divide = 0;
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int recombine = 0;
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@ -485,14 +468,10 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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int longblocks = (B0 == 1);
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uint32_t cm = 0;
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N_B0 = N_B = N / blocks;
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split = dualstereo = (Y != NULL);
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if (N == 1) {
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/* special case for one sample */
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int i;
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float *x = X;
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for (i = 0; i <= dualstereo; i++) {
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for (i = 0; i <= stereo; i++) {
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int sign = 0;
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if (f->remaining2 >= 1<<3) {
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sign = ff_opus_rc_get_raw(rc, 1);
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@ -507,7 +486,7 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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return 1;
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}
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if (!dualstereo && level == 0) {
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if (!stereo && level == 0) {
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int tf_change = f->tf_change[band];
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int k;
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if (tf_change > 0)
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@ -516,9 +495,8 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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if (lowband &&
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(recombine || ((N_B & 1) == 0 && tf_change < 0) || B0 > 1)) {
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int j;
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for (j = 0; j < N; j++)
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lowband_scratch[j] = lowband[j];
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for (i = 0; i < N; i++)
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lowband_scratch[i] = lowband[i];
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lowband = lowband_scratch;
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}
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@ -552,7 +530,7 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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/* If we need 1.5 more bit than we can produce, split the band in two. */
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cache = ff_celt_cache_bits +
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ff_celt_cache_index[(duration + 1) * CELT_MAX_BANDS + band];
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if (!dualstereo && duration >= 0 && b > cache[cache[0]] + 12 && N > 2) {
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if (!stereo && duration >= 0 && b > cache[cache[0]] + 12 && N > 2) {
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N >>= 1;
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Y = X + N;
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split = 1;
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@ -574,24 +552,24 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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/* Decide on the resolution to give to the split parameter theta */
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pulse_cap = ff_celt_log_freq_range[band] + duration * 8;
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offset = (pulse_cap >> 1) - (dualstereo && N == 2 ? CELT_QTHETA_OFFSET_TWOPHASE :
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offset = (pulse_cap >> 1) - (stereo && N == 2 ? CELT_QTHETA_OFFSET_TWOPHASE :
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CELT_QTHETA_OFFSET);
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qn = (dualstereo && band >= f->intensity_stereo) ? 1 :
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celt_compute_qn(N, b, offset, pulse_cap, dualstereo);
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qn = (stereo && band >= f->intensity_stereo) ? 1 :
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celt_compute_qn(N, b, offset, pulse_cap, stereo);
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tell = opus_rc_tell_frac(rc);
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if (qn != 1) {
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/* Entropy coding of the angle. We use a uniform pdf for the
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time split, a step for stereo, and a triangular one for the rest. */
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if (dualstereo && N > 2)
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if (stereo && N > 2)
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itheta = ff_opus_rc_dec_uint_step(rc, qn/2);
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else if (dualstereo || B0 > 1)
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else if (stereo || B0 > 1)
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itheta = ff_opus_rc_dec_uint(rc, qn+1);
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else
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itheta = ff_opus_rc_dec_uint_tri(rc, qn);
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itheta = itheta * 16384 / qn;
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/* NOTE: Renormalising X and Y *may* help fixed-point a bit at very high rate.
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Let's do that at higher complexity */
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} else if (dualstereo) {
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} else if (stereo) {
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inv = (b > 2 << 3 && f->remaining2 > 2 << 3) ? ff_opus_rc_dec_log(rc, 2) : 0;
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itheta = 0;
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}
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@ -623,7 +601,7 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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/* This is a special case for N=2 that only works for stereo and takes
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advantage of the fact that mid and side are orthogonal to encode
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the side with just one bit. */
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if (N == 2 && dualstereo) {
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if (N == 2 && stereo) {
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int c;
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int sign = 0;
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float tmp;
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@ -668,7 +646,7 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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/* Give more bits to low-energy MDCTs than they would
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* otherwise deserve */
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if (B0 > 1 && !dualstereo && (itheta & 0x3fff)) {
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if (B0 > 1 && !stereo && (itheta & 0x3fff)) {
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if (itheta > 8192)
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/* Rough approximation for pre-echo masking */
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delta -= delta >> (4 - duration);
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@ -681,12 +659,12 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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sbits = b - mbits;
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f->remaining2 -= qalloc;
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if (lowband && !dualstereo)
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if (lowband && !stereo)
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next_lowband2 = lowband + N; /* >32-bit split case */
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/* Only stereo needs to pass on lowband_out.
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* Otherwise, it's handled at the end */
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if (dualstereo)
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if (stereo)
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next_lowband_out1 = lowband_out;
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else
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next_level = level + 1;
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@ -697,7 +675,7 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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* because we need the normalized mid for folding later */
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cm = ff_celt_decode_band(f, rc, band, X, NULL, N, mbits, blocks,
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lowband, duration, next_lowband_out1,
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next_level, dualstereo ? 1.0f : (gain * mid),
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next_level, stereo ? 1.0f : (gain * mid),
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lowband_scratch, fill);
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rebalance = mbits - (rebalance - f->remaining2);
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@ -709,14 +687,14 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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cm |= ff_celt_decode_band(f, rc, band, Y, NULL, N, sbits, blocks,
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next_lowband2, duration, NULL,
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next_level, gain * side, NULL,
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fill >> blocks) << ((B0 >> 1) & (dualstereo - 1));
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fill >> blocks) << ((B0 >> 1) & (stereo - 1));
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} else {
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/* For a stereo split, the high bits of fill are always zero,
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* so no folding will be done to the side. */
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cm = ff_celt_decode_band(f, rc, band, Y, NULL, N, sbits, blocks,
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next_lowband2, duration, NULL,
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next_level, gain * side, NULL,
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fill >> blocks) << ((B0 >> 1) & (dualstereo - 1));
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fill >> blocks) << ((B0 >> 1) & (stereo - 1));
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rebalance = sbits - (rebalance - f->remaining2);
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if (rebalance > 3 << 3 && itheta != 16384)
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@ -726,7 +704,7 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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* we need the normalized mid for folding later */
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cm |= ff_celt_decode_band(f, rc, band, X, NULL, N, mbits, blocks,
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lowband, duration, next_lowband_out1,
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next_level, dualstereo ? 1.0f : (gain * mid),
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next_level, stereo ? 1.0f : (gain * mid),
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lowband_scratch, fill);
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}
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}
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@ -749,47 +727,44 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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f->spread, blocks, gain);
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} else {
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/* If there's no pulse, fill the band anyway */
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int j;
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uint32_t cm_mask = (1 << blocks) - 1;
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fill &= cm_mask;
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if (!fill) {
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for (j = 0; j < N; j++)
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X[j] = 0.0f;
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} else {
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if (fill) {
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if (!lowband) {
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/* Noise */
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for (j = 0; j < N; j++)
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X[j] = (((int32_t)celt_rng(f)) >> 20);
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for (i = 0; i < N; i++)
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X[i] = (((int32_t)celt_rng(f)) >> 20);
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cm = cm_mask;
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} else {
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/* Folded spectrum */
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for (j = 0; j < N; j++) {
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for (i = 0; i < N; i++) {
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/* About 48 dB below the "normal" folding level */
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X[j] = lowband[j] + (((celt_rng(f)) & 0x8000) ? 1.0f / 256 : -1.0f / 256);
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X[i] = lowband[i] + (((celt_rng(f)) & 0x8000) ? 1.0f / 256 : -1.0f / 256);
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}
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cm = fill;
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}
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celt_renormalize_vector(X, N, gain);
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} else {
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memset(X, 0, N*sizeof(float));
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}
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}
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}
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/* This code is used by the decoder and by the resynthesis-enabled encoder */
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if (dualstereo) {
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int j;
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if (N != 2)
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if (stereo) {
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if (N > 2)
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celt_stereo_merge(X, Y, mid, N);
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if (inv) {
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for (j = 0; j < N; j++)
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Y[j] *= -1;
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for (i = 0; i < N; i++)
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Y[i] *= -1;
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}
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} else if (level == 0) {
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int k;
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/* Undo the sample reorganization going from time order to frequency order */
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if (B0 > 1)
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celt_interleave_hadamard(f->scratch, X, N_B>>recombine,
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B0<<recombine, longblocks);
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celt_interleave_hadamard(f->scratch, X, N_B >> recombine,
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B0 << recombine, longblocks);
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/* Undo time-freq changes that we did earlier */
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N_B = N_B0;
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@ -809,10 +784,9 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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/* Scale output for later folding */
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if (lowband_out) {
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int j;
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float n = sqrtf(N0);
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for (j = 0; j < N0; j++)
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lowband_out[j] = n * X[j];
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for (i = 0; i < N0; i++)
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lowband_out[i] = n * X[i];
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}
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cm = av_mod_uintp2(cm, blocks);
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}
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@ -824,15 +798,17 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
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* big impact on the entire quantization and especially huge on transients */
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static int celt_calc_theta(const float *X, const float *Y, int coupling, int N)
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{
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int j;
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int i;
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float e[2] = { 0.0f, 0.0f };
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for (j = 0; j < N; j++) {
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if (coupling) { /* Coupling case */
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e[0] += (X[j] + Y[j])*(X[j] + Y[j]);
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e[1] += (X[j] - Y[j])*(X[j] - Y[j]);
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} else {
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e[0] += X[j]*X[j];
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e[1] += Y[j]*Y[j];
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if (coupling) { /* Coupling case */
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for (i = 0; i < N; i++) {
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e[0] += (X[i] + Y[i])*(X[i] + Y[i]);
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e[1] += (X[i] - Y[i])*(X[i] - Y[i]);
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}
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} else {
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for (i = 0; i < N; i++) {
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e[0] += X[i]*X[i];
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e[1] += Y[i]*Y[i];
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}
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}
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return lrintf(32768.0f*atan2f(sqrtf(e[1]), sqrtf(e[0]))/M_PI);
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@ -851,11 +827,10 @@ static void celt_stereo_is_decouple(float *X, float *Y, float e_l, float e_r, in
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static void celt_stereo_ms_decouple(float *X, float *Y, int N)
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{
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int i;
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const float decouple_norm = 1.0f/sqrtf(1.0f + 1.0f);
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for (i = 0; i < N; i++) {
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const float Xret = X[i];
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X[i] = (X[i] + Y[i])*decouple_norm;
|
||||
Y[i] = (Y[i] - Xret)*decouple_norm;
|
||||
X[i] = (X[i] + Y[i])*M_SQRT1_2;
|
||||
Y[i] = (Y[i] - Xret)*M_SQRT1_2;
|
||||
}
|
||||
}
|
||||
|
||||
@ -864,8 +839,9 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
float *lowband, int duration, float *lowband_out, int level,
|
||||
float gain, float *lowband_scratch, int fill)
|
||||
{
|
||||
int i;
|
||||
const uint8_t *cache;
|
||||
int dualstereo, split;
|
||||
int stereo = !!Y, split = !!Y;
|
||||
int imid = 0, iside = 0;
|
||||
uint32_t N0 = N;
|
||||
int N_B = N / blocks;
|
||||
@ -878,13 +854,10 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
int longblocks = (B0 == 1);
|
||||
uint32_t cm = 0;
|
||||
|
||||
split = dualstereo = (Y != NULL);
|
||||
|
||||
if (N == 1) {
|
||||
/* special case for one sample - the decoder's output will be +- 1.0f!!! */
|
||||
int i;
|
||||
float *x = X;
|
||||
for (i = 0; i <= dualstereo; i++) {
|
||||
for (i = 0; i <= stereo; i++) {
|
||||
if (f->remaining2 >= 1<<3) {
|
||||
ff_opus_rc_put_raw(rc, x[0] < 0, 1);
|
||||
f->remaining2 -= 1 << 3;
|
||||
@ -898,7 +871,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
return 1;
|
||||
}
|
||||
|
||||
if (!dualstereo && level == 0) {
|
||||
if (!stereo && level == 0) {
|
||||
int tf_change = f->tf_change[band];
|
||||
int k;
|
||||
if (tf_change > 0)
|
||||
@ -907,9 +880,8 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
|
||||
if (lowband &&
|
||||
(recombine || ((N_B & 1) == 0 && tf_change < 0) || B0 > 1)) {
|
||||
int j;
|
||||
for (j = 0; j < N; j++)
|
||||
lowband_scratch[j] = lowband[j];
|
||||
for (i = 0; i < N; i++)
|
||||
lowband_scratch[i] = lowband[i];
|
||||
lowband = lowband_scratch;
|
||||
}
|
||||
|
||||
@ -941,7 +913,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
/* If we need 1.5 more bit than we can produce, split the band in two. */
|
||||
cache = ff_celt_cache_bits +
|
||||
ff_celt_cache_index[(duration + 1) * CELT_MAX_BANDS + band];
|
||||
if (!dualstereo && duration >= 0 && b > cache[cache[0]] + 12 && N > 2) {
|
||||
if (!stereo && duration >= 0 && b > cache[cache[0]] + 12 && N > 2) {
|
||||
N >>= 1;
|
||||
Y = X + N;
|
||||
split = 1;
|
||||
@ -953,7 +925,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
|
||||
if (split) {
|
||||
int qn;
|
||||
int itheta = celt_calc_theta(X, Y, dualstereo, N);
|
||||
int itheta = celt_calc_theta(X, Y, stereo, N);
|
||||
int mbits, sbits, delta;
|
||||
int qalloc;
|
||||
int pulse_cap;
|
||||
@ -963,10 +935,10 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
|
||||
/* Decide on the resolution to give to the split parameter theta */
|
||||
pulse_cap = ff_celt_log_freq_range[band] + duration * 8;
|
||||
offset = (pulse_cap >> 1) - (dualstereo && N == 2 ? CELT_QTHETA_OFFSET_TWOPHASE :
|
||||
offset = (pulse_cap >> 1) - (stereo && N == 2 ? CELT_QTHETA_OFFSET_TWOPHASE :
|
||||
CELT_QTHETA_OFFSET);
|
||||
qn = (dualstereo && band >= f->intensity_stereo) ? 1 :
|
||||
celt_compute_qn(N, b, offset, pulse_cap, dualstereo);
|
||||
qn = (stereo && band >= f->intensity_stereo) ? 1 :
|
||||
celt_compute_qn(N, b, offset, pulse_cap, stereo);
|
||||
tell = opus_rc_tell_frac(rc);
|
||||
|
||||
if (qn != 1) {
|
||||
@ -975,27 +947,26 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
|
||||
/* Entropy coding of the angle. We use a uniform pdf for the
|
||||
* time split, a step for stereo, and a triangular one for the rest. */
|
||||
if (dualstereo && N > 2)
|
||||
if (stereo && N > 2)
|
||||
ff_opus_rc_enc_uint_step(rc, itheta, qn / 2);
|
||||
else if (dualstereo || B0 > 1)
|
||||
else if (stereo || B0 > 1)
|
||||
ff_opus_rc_enc_uint(rc, itheta, qn + 1);
|
||||
else
|
||||
ff_opus_rc_enc_uint_tri(rc, itheta, qn);
|
||||
itheta = itheta * 16384 / qn;
|
||||
|
||||
if (dualstereo) {
|
||||
if (stereo) {
|
||||
if (itheta == 0)
|
||||
celt_stereo_is_decouple(X, Y, f->block[0].lin_energy[band],
|
||||
f->block[1].lin_energy[band], N);
|
||||
else
|
||||
celt_stereo_ms_decouple(X, Y, N);
|
||||
}
|
||||
} else if (dualstereo) {
|
||||
} else if (stereo) {
|
||||
inv = itheta > 8192;
|
||||
if (inv) {
|
||||
int j;
|
||||
for (j = 0; j < N; j++)
|
||||
Y[j] = -Y[j];
|
||||
for (i = 0; i < N; i++)
|
||||
Y[i] *= -1;
|
||||
}
|
||||
celt_stereo_is_decouple(X, Y, f->block[0].lin_energy[band],
|
||||
f->block[1].lin_energy[band], N);
|
||||
@ -1036,7 +1007,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
/* This is a special case for N=2 that only works for stereo and takes
|
||||
advantage of the fact that mid and side are orthogonal to encode
|
||||
the side with just one bit. */
|
||||
if (N == 2 && dualstereo) {
|
||||
if (N == 2 && stereo) {
|
||||
int c;
|
||||
int sign = 0;
|
||||
float tmp;
|
||||
@ -1083,7 +1054,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
|
||||
/* Give more bits to low-energy MDCTs than they would
|
||||
* otherwise deserve */
|
||||
if (B0 > 1 && !dualstereo && (itheta & 0x3fff)) {
|
||||
if (B0 > 1 && !stereo && (itheta & 0x3fff)) {
|
||||
if (itheta > 8192)
|
||||
/* Rough approximation for pre-echo masking */
|
||||
delta -= delta >> (4 - duration);
|
||||
@ -1096,12 +1067,12 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
sbits = b - mbits;
|
||||
f->remaining2 -= qalloc;
|
||||
|
||||
if (lowband && !dualstereo)
|
||||
if (lowband && !stereo)
|
||||
next_lowband2 = lowband + N; /* >32-bit split case */
|
||||
|
||||
/* Only stereo needs to pass on lowband_out.
|
||||
* Otherwise, it's handled at the end */
|
||||
if (dualstereo)
|
||||
if (stereo)
|
||||
next_lowband_out1 = lowband_out;
|
||||
else
|
||||
next_level = level + 1;
|
||||
@ -1112,7 +1083,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
* because we need the normalized mid for folding later */
|
||||
cm = ff_celt_encode_band(f, rc, band, X, NULL, N, mbits, blocks,
|
||||
lowband, duration, next_lowband_out1,
|
||||
next_level, dualstereo ? 1.0f : (gain * mid),
|
||||
next_level, stereo ? 1.0f : (gain * mid),
|
||||
lowband_scratch, fill);
|
||||
|
||||
rebalance = mbits - (rebalance - f->remaining2);
|
||||
@ -1124,14 +1095,14 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
cm |= ff_celt_encode_band(f, rc, band, Y, NULL, N, sbits, blocks,
|
||||
next_lowband2, duration, NULL,
|
||||
next_level, gain * side, NULL,
|
||||
fill >> blocks) << ((B0 >> 1) & (dualstereo - 1));
|
||||
fill >> blocks) << ((B0 >> 1) & (stereo - 1));
|
||||
} else {
|
||||
/* For a stereo split, the high bits of fill are always zero,
|
||||
* so no folding will be done to the side. */
|
||||
cm = ff_celt_encode_band(f, rc, band, Y, NULL, N, sbits, blocks,
|
||||
next_lowband2, duration, NULL,
|
||||
next_level, gain * side, NULL,
|
||||
fill >> blocks) << ((B0 >> 1) & (dualstereo - 1));
|
||||
fill >> blocks) << ((B0 >> 1) & (stereo - 1));
|
||||
|
||||
rebalance = sbits - (rebalance - f->remaining2);
|
||||
if (rebalance > 3 << 3 && itheta != 16384)
|
||||
@ -1141,7 +1112,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
* we need the normalized mid for folding later */
|
||||
cm |= ff_celt_encode_band(f, rc, band, X, NULL, N, mbits, blocks,
|
||||
lowband, duration, next_lowband_out1,
|
||||
next_level, dualstereo ? 1.0f : (gain * mid),
|
||||
next_level, stereo ? 1.0f : (gain * mid),
|
||||
lowband_scratch, fill);
|
||||
}
|
||||
}
|
||||
@ -1164,39 +1135,36 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
f->spread, blocks, gain);
|
||||
} else {
|
||||
/* If there's no pulse, fill the band anyway */
|
||||
int j;
|
||||
uint32_t cm_mask = (1 << blocks) - 1;
|
||||
fill &= cm_mask;
|
||||
if (!fill) {
|
||||
for (j = 0; j < N; j++)
|
||||
X[j] = 0.0f;
|
||||
} else {
|
||||
if (fill) {
|
||||
if (!lowband) {
|
||||
/* Noise */
|
||||
for (j = 0; j < N; j++)
|
||||
X[j] = (((int32_t)celt_rng(f)) >> 20);
|
||||
for (i = 0; i < N; i++)
|
||||
X[i] = (((int32_t)celt_rng(f)) >> 20);
|
||||
cm = cm_mask;
|
||||
} else {
|
||||
/* Folded spectrum */
|
||||
for (j = 0; j < N; j++) {
|
||||
for (i = 0; i < N; i++) {
|
||||
/* About 48 dB below the "normal" folding level */
|
||||
X[j] = lowband[j] + (((celt_rng(f)) & 0x8000) ? 1.0f / 256 : -1.0f / 256);
|
||||
X[i] = lowband[i] + (((celt_rng(f)) & 0x8000) ? 1.0f / 256 : -1.0f / 256);
|
||||
}
|
||||
cm = fill;
|
||||
}
|
||||
celt_renormalize_vector(X, N, gain);
|
||||
} else {
|
||||
memset(X, 0, N*sizeof(float));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* This code is used by the decoder and by the resynthesis-enabled encoder */
|
||||
if (dualstereo) {
|
||||
int j;
|
||||
if (N != 2)
|
||||
if (stereo) {
|
||||
if (N > 2)
|
||||
celt_stereo_merge(X, Y, mid, N);
|
||||
if (inv) {
|
||||
for (j = 0; j < N; j++)
|
||||
Y[j] *= -1;
|
||||
for (i = 0; i < N; i++)
|
||||
Y[i] *= -1;
|
||||
}
|
||||
} else if (level == 0) {
|
||||
int k;
|
||||
@ -1204,7 +1172,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
/* Undo the sample reorganization going from time order to frequency order */
|
||||
if (B0 > 1)
|
||||
celt_interleave_hadamard(f->scratch, X, N_B >> recombine,
|
||||
B0<<recombine, longblocks);
|
||||
B0 << recombine, longblocks);
|
||||
|
||||
/* Undo time-freq changes that we did earlier */
|
||||
N_B = N_B0;
|
||||
@ -1224,10 +1192,9 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
|
||||
|
||||
/* Scale output for later folding */
|
||||
if (lowband_out) {
|
||||
int j;
|
||||
float n = sqrtf(N0);
|
||||
for (j = 0; j < N0; j++)
|
||||
lowband_out[j] = n * X[j];
|
||||
for (i = 0; i < N0; i++)
|
||||
lowband_out[i] = n * X[i];
|
||||
}
|
||||
cm = av_mod_uintp2(cm, blocks);
|
||||
}
|
||||
|
||||
@ -930,11 +930,12 @@ const uint8_t ff_celt_bit_deinterleave[] = {
|
||||
0xC0, 0xC3, 0xCC, 0xCF, 0xF0, 0xF3, 0xFC, 0xFF
|
||||
};
|
||||
|
||||
const uint8_t ff_celt_hadamard_ordery[] = {
|
||||
const uint8_t ff_celt_hadamard_order[] = {
|
||||
1, 0,
|
||||
3, 0, 2, 1,
|
||||
7, 0, 4, 3, 6, 1, 5, 2,
|
||||
15, 0, 8, 7, 12, 3, 11, 4, 14, 1, 9, 6, 13, 2, 10, 5
|
||||
15, 0, 8, 7, 12, 3, 11, 4, 14, 1, 9, 6, 13, 2, 10, 5,
|
||||
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
|
||||
};
|
||||
|
||||
const uint16_t ff_celt_qn_exp2[] = {
|
||||
|
||||
@ -146,7 +146,7 @@ extern const uint8_t ff_celt_log2_frac[];
|
||||
extern const uint8_t ff_celt_bit_interleave[];
|
||||
extern const uint8_t ff_celt_bit_deinterleave[];
|
||||
|
||||
extern const uint8_t ff_celt_hadamard_ordery[];
|
||||
extern const uint8_t ff_celt_hadamard_order[];
|
||||
|
||||
extern const uint16_t ff_celt_qn_exp2[];
|
||||
extern const uint32_t ff_celt_pvq_u[1272];
|
||||
|
||||
Loading…
Reference in New Issue
Block a user