/*
* Copyright (c) 2012 Andrew D'Addesio
* Copyright (c) 2013-2014 Mozilla Corporation
+ * Copyright (c) 2016 Rostislav Pehlivanov <atomnuker@gmail.com>
*
* This file is part of FFmpeg.
*
* Opus CELT decoder
*/
-#include <stdint.h>
-
-#include "libavutil/float_dsp.h"
-#include "libavutil/libm.h"
-
-#include "imdct15.h"
-#include "opus.h"
+#include "opus_celt.h"
#include "opustab.h"
+#include "opus_pvq.h"
-enum CeltSpread {
- CELT_SPREAD_NONE,
- CELT_SPREAD_LIGHT,
- CELT_SPREAD_NORMAL,
- CELT_SPREAD_AGGRESSIVE
-};
-
-typedef struct CeltFrame {
- float energy[CELT_MAX_BANDS];
- float prev_energy[2][CELT_MAX_BANDS];
-
- uint8_t collapse_masks[CELT_MAX_BANDS];
-
- /* buffer for mdct output + postfilter */
- DECLARE_ALIGNED(32, float, buf)[2048];
-
- /* postfilter parameters */
- int pf_period_new;
- float pf_gains_new[3];
- int pf_period;
- float pf_gains[3];
- int pf_period_old;
- float pf_gains_old[3];
-
- float deemph_coeff;
-} CeltFrame;
-
-struct CeltContext {
- // constant values that do not change during context lifetime
- AVCodecContext *avctx;
- IMDCT15Context *imdct[4];
- AVFloatDSPContext *dsp;
- int output_channels;
-
- // values that have inter-frame effect and must be reset on flush
- CeltFrame frame[2];
- uint32_t seed;
- int flushed;
-
- // values that only affect a single frame
- int coded_channels;
- int framebits;
- int duration;
-
- /* number of iMDCT blocks in the frame */
- int blocks;
- /* size of each block */
- int blocksize;
-
- int startband;
- int endband;
- int codedbands;
-
- int anticollapse_bit;
-
- int intensitystereo;
- int dualstereo;
- enum CeltSpread spread;
-
- int remaining;
- int remaining2;
- int fine_bits [CELT_MAX_BANDS];
- int fine_priority[CELT_MAX_BANDS];
- int pulses [CELT_MAX_BANDS];
- int tf_change [CELT_MAX_BANDS];
-
- DECLARE_ALIGNED(32, float, coeffs)[2][CELT_MAX_FRAME_SIZE];
- DECLARE_ALIGNED(32, float, scratch)[22 * 8]; // MAX(ff_celt_freq_range) * 1<<CELT_MAX_LOG_BLOCKS
-};
-
-static inline int16_t celt_cos(int16_t x)
-{
- x = (MUL16(x, x) + 4096) >> 13;
- x = (32767-x) + ROUND_MUL16(x, (-7651 + ROUND_MUL16(x, (8277 + ROUND_MUL16(-626, x)))));
- return 1+x;
-}
-
-static inline int celt_log2tan(int isin, int icos)
-{
- int lc, ls;
- lc = opus_ilog(icos);
- ls = opus_ilog(isin);
- icos <<= 15 - lc;
- isin <<= 15 - ls;
- return (ls << 11) - (lc << 11) +
- ROUND_MUL16(isin, ROUND_MUL16(isin, -2597) + 7932) -
- ROUND_MUL16(icos, ROUND_MUL16(icos, -2597) + 7932);
-}
-
-static inline uint32_t celt_rng(CeltContext *s)
-{
- s->seed = 1664525 * s->seed + 1013904223;
- return s->seed;
-}
-
-static void celt_decode_coarse_energy(CeltContext *s, OpusRangeCoder *rc)
+static void celt_decode_coarse_energy(CeltFrame *f, OpusRangeCoder *rc)
{
int i, j;
float prev[2] = {0};
/* use the 2D z-transform to apply prediction in both */
/* the time domain (alpha) and the frequency domain (beta) */
- if (opus_rc_tell(rc)+3 <= s->framebits && ff_opus_rc_dec_log(rc, 3)) {
+ if (opus_rc_tell(rc)+3 <= f->framebits && ff_opus_rc_dec_log(rc, 3)) {
/* intra frame */
alpha = 0;
beta = 1.0f - 4915.0f/32768.0f;
- model = ff_celt_coarse_energy_dist[s->duration][1];
+ model = ff_celt_coarse_energy_dist[f->size][1];
} else {
- alpha = ff_celt_alpha_coef[s->duration];
- beta = 1.0f - ff_celt_beta_coef[s->duration];
- model = ff_celt_coarse_energy_dist[s->duration][0];
+ alpha = ff_celt_alpha_coef[f->size];
+ beta = 1.0f - ff_celt_beta_coef[f->size];
+ model = ff_celt_coarse_energy_dist[f->size][0];
}
for (i = 0; i < CELT_MAX_BANDS; i++) {
- for (j = 0; j < s->coded_channels; j++) {
- CeltFrame *frame = &s->frame[j];
+ for (j = 0; j < f->channels; j++) {
+ CeltBlock *block = &f->block[j];
float value;
int available;
- if (i < s->startband || i >= s->endband) {
- frame->energy[i] = 0.0;
+ if (i < f->start_band || i >= f->end_band) {
+ block->energy[i] = 0.0;
continue;
}
- available = s->framebits - opus_rc_tell(rc);
+ available = f->framebits - opus_rc_tell(rc);
if (available >= 15) {
/* decode using a Laplace distribution */
int k = FFMIN(i, 20) << 1;
value = -(float)ff_opus_rc_dec_log(rc, 1);
} else value = -1;
- frame->energy[i] = FFMAX(-9.0f, frame->energy[i]) * alpha + prev[j] + value;
+ block->energy[i] = FFMAX(-9.0f, block->energy[i]) * alpha + prev[j] + value;
prev[j] += beta * value;
}
}
}
-static void celt_decode_fine_energy(CeltContext *s, OpusRangeCoder *rc)
+static void celt_decode_fine_energy(CeltFrame *f, OpusRangeCoder *rc)
{
int i;
- for (i = s->startband; i < s->endband; i++) {
+ for (i = f->start_band; i < f->end_band; i++) {
int j;
- if (!s->fine_bits[i])
+ if (!f->fine_bits[i])
continue;
- for (j = 0; j < s->coded_channels; j++) {
- CeltFrame *frame = &s->frame[j];
+ for (j = 0; j < f->channels; j++) {
+ CeltBlock *block = &f->block[j];
int q2;
float offset;
- q2 = ff_opus_rc_get_raw(rc, s->fine_bits[i]);
- offset = (q2 + 0.5f) * (1 << (14 - s->fine_bits[i])) / 16384.0f - 0.5f;
- frame->energy[i] += offset;
+ q2 = ff_opus_rc_get_raw(rc, f->fine_bits[i]);
+ offset = (q2 + 0.5f) * (1 << (14 - f->fine_bits[i])) / 16384.0f - 0.5f;
+ block->energy[i] += offset;
}
}
}
-static void celt_decode_final_energy(CeltContext *s, OpusRangeCoder *rc,
- int bits_left)
+static void celt_decode_final_energy(CeltFrame *f, OpusRangeCoder *rc)
{
int priority, i, j;
+ int bits_left = f->framebits - opus_rc_tell(rc);
for (priority = 0; priority < 2; priority++) {
- for (i = s->startband; i < s->endband && bits_left >= s->coded_channels; i++) {
- if (s->fine_priority[i] != priority || s->fine_bits[i] >= CELT_MAX_FINE_BITS)
+ for (i = f->start_band; i < f->end_band && bits_left >= f->channels; i++) {
+ if (f->fine_priority[i] != priority || f->fine_bits[i] >= CELT_MAX_FINE_BITS)
continue;
- for (j = 0; j < s->coded_channels; j++) {
+ for (j = 0; j < f->channels; j++) {
int q2;
float offset;
q2 = ff_opus_rc_get_raw(rc, 1);
- offset = (q2 - 0.5f) * (1 << (14 - s->fine_bits[i] - 1)) / 16384.0f;
- s->frame[j].energy[i] += offset;
+ offset = (q2 - 0.5f) * (1 << (14 - f->fine_bits[i] - 1)) / 16384.0f;
+ f->block[j].energy[i] += offset;
bits_left--;
}
}
}
}
-static void celt_decode_tf_changes(CeltContext *s, OpusRangeCoder *rc,
- int transient)
+static void celt_decode_tf_changes(CeltFrame *f, OpusRangeCoder *rc)
{
int i, diff = 0, tf_select = 0, tf_changed = 0, tf_select_bit;
- int consumed, bits = transient ? 2 : 4;
+ int consumed, bits = f->transient ? 2 : 4;
consumed = opus_rc_tell(rc);
- tf_select_bit = (s->duration != 0 && consumed+bits+1 <= s->framebits);
+ tf_select_bit = (f->size != 0 && consumed+bits+1 <= f->framebits);
- for (i = s->startband; i < s->endband; i++) {
- if (consumed+bits+tf_select_bit <= s->framebits) {
+ for (i = f->start_band; i < f->end_band; i++) {
+ if (consumed+bits+tf_select_bit <= f->framebits) {
diff ^= ff_opus_rc_dec_log(rc, bits);
consumed = opus_rc_tell(rc);
tf_changed |= diff;
}
- s->tf_change[i] = diff;
- bits = transient ? 4 : 5;
+ f->tf_change[i] = diff;
+ bits = f->transient ? 4 : 5;
}
- if (tf_select_bit && ff_celt_tf_select[s->duration][transient][0][tf_changed] !=
- ff_celt_tf_select[s->duration][transient][1][tf_changed])
+ if (tf_select_bit && ff_celt_tf_select[f->size][f->transient][0][tf_changed] !=
+ ff_celt_tf_select[f->size][f->transient][1][tf_changed])
tf_select = ff_opus_rc_dec_log(rc, 1);
- for (i = s->startband; i < s->endband; i++) {
- s->tf_change[i] = ff_celt_tf_select[s->duration][transient][tf_select][s->tf_change[i]];
+ for (i = f->start_band; i < f->end_band; i++) {
+ f->tf_change[i] = ff_celt_tf_select[f->size][f->transient][tf_select][f->tf_change[i]];
}
}
-static void celt_decode_allocation(CeltContext *s, OpusRangeCoder *rc)
+static void celt_decode_allocation(CeltFrame *f, OpusRangeCoder *rc)
{
// approx. maximum bit allocation for each band before boost/trim
int cap[CELT_MAX_BANDS];
int bits2[CELT_MAX_BANDS];
int trim_offset[CELT_MAX_BANDS];
- int skip_startband = s->startband;
+ int skip_start_band = f->start_band;
int dynalloc = 6;
int alloctrim = 5;
int extrabits = 0;
- int skip_bit = 0;
- int intensitystereo_bit = 0;
- int dualstereo_bit = 0;
+ int skip_bit = 0;
+ int intensity_stereo_bit = 0;
+ int dual_stereo_bit = 0;
int remaining, bandbits;
int low, high, total, done;
consumed = opus_rc_tell(rc);
/* obtain spread flag */
- s->spread = CELT_SPREAD_NORMAL;
- if (consumed + 4 <= s->framebits)
- s->spread = ff_opus_rc_dec_cdf(rc, ff_celt_model_spread);
+ f->spread = CELT_SPREAD_NORMAL;
+ if (consumed + 4 <= f->framebits)
+ f->spread = ff_opus_rc_dec_cdf(rc, ff_celt_model_spread);
/* generate static allocation caps */
for (i = 0; i < CELT_MAX_BANDS; i++) {
- cap[i] = (ff_celt_static_caps[s->duration][s->coded_channels - 1][i] + 64)
- * ff_celt_freq_range[i] << (s->coded_channels - 1) << s->duration >> 2;
+ cap[i] = (ff_celt_static_caps[f->size][f->channels - 1][i] + 64)
+ * ff_celt_freq_range[i] << (f->channels - 1) << f->size >> 2;
}
/* obtain band boost */
- totalbits = s->framebits << 3; // convert to 1/8 bits
+ totalbits = f->framebits << 3; // convert to 1/8 bits
consumed = opus_rc_tell_frac(rc);
- for (i = s->startband; i < s->endband; i++) {
+ for (i = f->start_band; i < f->end_band; i++) {
int quanta, band_dynalloc;
boost[i] = 0;
- quanta = ff_celt_freq_range[i] << (s->coded_channels - 1) << s->duration;
+ quanta = ff_celt_freq_range[i] << (f->channels - 1) << f->size;
quanta = FFMIN(quanta << 3, FFMAX(6 << 3, quanta));
band_dynalloc = dynalloc;
while (consumed + (band_dynalloc<<3) < totalbits && boost[i] < cap[i]) {
alloctrim = ff_opus_rc_dec_cdf(rc, ff_celt_model_alloc_trim);
/* anti-collapse bit reservation */
- totalbits = (s->framebits << 3) - opus_rc_tell_frac(rc) - 1;
- s->anticollapse_bit = 0;
- if (s->blocks > 1 && s->duration >= 2 &&
- totalbits >= ((s->duration + 2) << 3))
- s->anticollapse_bit = 1 << 3;
- totalbits -= s->anticollapse_bit;
+ totalbits = (f->framebits << 3) - opus_rc_tell_frac(rc) - 1;
+ f->anticollapse_needed = 0;
+ if (f->blocks > 1 && f->size >= 2 &&
+ totalbits >= ((f->size + 2) << 3))
+ f->anticollapse_needed = 1 << 3;
+ totalbits -= f->anticollapse_needed;
/* band skip bit reservation */
if (totalbits >= 1 << 3)
totalbits -= skip_bit;
/* intensity/dual stereo bit reservation */
- if (s->coded_channels == 2) {
- intensitystereo_bit = ff_celt_log2_frac[s->endband - s->startband];
- if (intensitystereo_bit <= totalbits) {
- totalbits -= intensitystereo_bit;
+ if (f->channels == 2) {
+ intensity_stereo_bit = ff_celt_log2_frac[f->end_band - f->start_band];
+ if (intensity_stereo_bit <= totalbits) {
+ totalbits -= intensity_stereo_bit;
if (totalbits >= 1 << 3) {
- dualstereo_bit = 1 << 3;
+ dual_stereo_bit = 1 << 3;
totalbits -= 1 << 3;
}
} else
- intensitystereo_bit = 0;
+ intensity_stereo_bit = 0;
}
- for (i = s->startband; i < s->endband; i++) {
- int trim = alloctrim - 5 - s->duration;
- int band = ff_celt_freq_range[i] * (s->endband - i - 1);
- int duration = s->duration + 3;
- int scale = duration + s->coded_channels - 1;
+ for (i = f->start_band; i < f->end_band; i++) {
+ int trim = alloctrim - 5 - f->size;
+ int band = ff_celt_freq_range[i] * (f->end_band - i - 1);
+ int duration = f->size + 3;
+ int scale = duration + f->channels - 1;
/* PVQ minimum allocation threshold, below this value the band is
* skipped */
threshold[i] = FFMAX(3 * ff_celt_freq_range[i] << duration >> 4,
- s->coded_channels << 3);
+ f->channels << 3);
trim_offset[i] = trim * (band << scale) >> 6;
- if (ff_celt_freq_range[i] << s->duration == 1)
- trim_offset[i] -= s->coded_channels << 3;
+ if (ff_celt_freq_range[i] << f->size == 1)
+ trim_offset[i] -= f->channels << 3;
}
/* bisection */
int center = (low + high) >> 1;
done = total = 0;
- for (i = s->endband - 1; i >= s->startband; i--) {
+ for (i = f->end_band - 1; i >= f->start_band; i--) {
bandbits = ff_celt_freq_range[i] * ff_celt_static_alloc[center][i]
- << (s->coded_channels - 1) << s->duration >> 2;
+ << (f->channels - 1) << f->size >> 2;
if (bandbits)
bandbits = FFMAX(0, bandbits + trim_offset[i]);
if (bandbits >= threshold[i] || done) {
done = 1;
total += FFMIN(bandbits, cap[i]);
- } else if (bandbits >= s->coded_channels << 3)
- total += s->coded_channels << 3;
+ } else if (bandbits >= f->channels << 3)
+ total += f->channels << 3;
}
if (total > totalbits)
}
high = low--;
- for (i = s->startband; i < s->endband; i++) {
+ for (i = f->start_band; i < f->end_band; i++) {
bits1[i] = ff_celt_freq_range[i] * ff_celt_static_alloc[low][i]
- << (s->coded_channels - 1) << s->duration >> 2;
+ << (f->channels - 1) << f->size >> 2;
bits2[i] = high >= CELT_VECTORS ? cap[i] :
ff_celt_freq_range[i] * ff_celt_static_alloc[high][i]
- << (s->coded_channels - 1) << s->duration >> 2;
+ << (f->channels - 1) << f->size >> 2;
if (bits1[i])
bits1[i] = FFMAX(0, bits1[i] + trim_offset[i]);
bits2[i] += boost[i];
if (boost[i])
- skip_startband = i;
+ skip_start_band = i;
bits2[i] = FFMAX(0, bits2[i] - bits1[i]);
}
int center = (low + high) >> 1;
done = total = 0;
- for (j = s->endband - 1; j >= s->startband; j--) {
+ for (j = f->end_band - 1; j >= f->start_band; j--) {
bandbits = bits1[j] + (center * bits2[j] >> CELT_ALLOC_STEPS);
if (bandbits >= threshold[j] || done) {
done = 1;
total += FFMIN(bandbits, cap[j]);
- } else if (bandbits >= s->coded_channels << 3)
- total += s->coded_channels << 3;
+ } else if (bandbits >= f->channels << 3)
+ total += f->channels << 3;
}
if (total > totalbits)
high = center;
}
done = total = 0;
- for (i = s->endband - 1; i >= s->startband; i--) {
+ for (i = f->end_band - 1; i >= f->start_band; i--) {
bandbits = bits1[i] + (low * bits2[i] >> CELT_ALLOC_STEPS);
if (bandbits >= threshold[i] || done)
done = 1;
else
- bandbits = (bandbits >= s->coded_channels << 3) ?
- s->coded_channels << 3 : 0;
+ bandbits = (bandbits >= f->channels << 3) ?
+ f->channels << 3 : 0;
bandbits = FFMIN(bandbits, cap[i]);
- s->pulses[i] = bandbits;
+ f->pulses[i] = bandbits;
total += bandbits;
}
/* band skipping */
- for (s->codedbands = s->endband; ; s->codedbands--) {
+ for (f->coded_bands = f->end_band; ; f->coded_bands--) {
int allocation;
- j = s->codedbands - 1;
+ j = f->coded_bands - 1;
- if (j == skip_startband) {
+ if (j == skip_start_band) {
/* all remaining bands are not skipped */
totalbits += skip_bit;
break;
/* determine the number of bits available for coding "do not skip" markers */
remaining = totalbits - total;
- bandbits = remaining / (ff_celt_freq_bands[j+1] - ff_celt_freq_bands[s->startband]);
- remaining -= bandbits * (ff_celt_freq_bands[j+1] - ff_celt_freq_bands[s->startband]);
- allocation = s->pulses[j] + bandbits * ff_celt_freq_range[j]
- + FFMAX(0, remaining - (ff_celt_freq_bands[j] - ff_celt_freq_bands[s->startband]));
+ bandbits = remaining / (ff_celt_freq_bands[j+1] - ff_celt_freq_bands[f->start_band]);
+ remaining -= bandbits * (ff_celt_freq_bands[j+1] - ff_celt_freq_bands[f->start_band]);
+ allocation = f->pulses[j] + bandbits * ff_celt_freq_range[j]
+ + FFMAX(0, remaining - (ff_celt_freq_bands[j] - ff_celt_freq_bands[f->start_band]));
/* a "do not skip" marker is only coded if the allocation is
above the chosen threshold */
- if (allocation >= FFMAX(threshold[j], (s->coded_channels + 1) <<3 )) {
+ if (allocation >= FFMAX(threshold[j], (f->channels + 1) <<3 )) {
if (ff_opus_rc_dec_log(rc, 1))
break;
}
/* the band is skipped, so reclaim its bits */
- total -= s->pulses[j];
- if (intensitystereo_bit) {
- total -= intensitystereo_bit;
- intensitystereo_bit = ff_celt_log2_frac[j - s->startband];
- total += intensitystereo_bit;
+ total -= f->pulses[j];
+ if (intensity_stereo_bit) {
+ total -= intensity_stereo_bit;
+ intensity_stereo_bit = ff_celt_log2_frac[j - f->start_band];
+ total += intensity_stereo_bit;
}
- total += s->pulses[j] = (allocation >= s->coded_channels << 3) ?
- s->coded_channels << 3 : 0;
+ total += f->pulses[j] = (allocation >= f->channels << 3) ?
+ f->channels << 3 : 0;
}
/* obtain stereo flags */
- s->intensitystereo = 0;
- s->dualstereo = 0;
- if (intensitystereo_bit)
- s->intensitystereo = s->startband +
- ff_opus_rc_dec_uint(rc, s->codedbands + 1 - s->startband);
- if (s->intensitystereo <= s->startband)
- totalbits += dualstereo_bit; /* no intensity stereo means no dual stereo */
- else if (dualstereo_bit)
- s->dualstereo = ff_opus_rc_dec_log(rc, 1);
+ f->intensity_stereo = 0;
+ f->dual_stereo = 0;
+ if (intensity_stereo_bit)
+ f->intensity_stereo = f->start_band +
+ ff_opus_rc_dec_uint(rc, f->coded_bands + 1 - f->start_band);
+ if (f->intensity_stereo <= f->start_band)
+ totalbits += dual_stereo_bit; /* no intensity stereo means no dual stereo */
+ else if (dual_stereo_bit)
+ f->dual_stereo = ff_opus_rc_dec_log(rc, 1);
/* supply the remaining bits in this frame to lower bands */
remaining = totalbits - total;
- bandbits = remaining / (ff_celt_freq_bands[s->codedbands] - ff_celt_freq_bands[s->startband]);
- remaining -= bandbits * (ff_celt_freq_bands[s->codedbands] - ff_celt_freq_bands[s->startband]);
- for (i = s->startband; i < s->codedbands; i++) {
+ bandbits = remaining / (ff_celt_freq_bands[f->coded_bands] - ff_celt_freq_bands[f->start_band]);
+ remaining -= bandbits * (ff_celt_freq_bands[f->coded_bands] - ff_celt_freq_bands[f->start_band]);
+ for (i = f->start_band; i < f->coded_bands; i++) {
int bits = FFMIN(remaining, ff_celt_freq_range[i]);
- s->pulses[i] += bits + bandbits * ff_celt_freq_range[i];
+ f->pulses[i] += bits + bandbits * ff_celt_freq_range[i];
remaining -= bits;
}
- for (i = s->startband; i < s->codedbands; i++) {
- int N = ff_celt_freq_range[i] << s->duration;
+ for (i = f->start_band; i < f->coded_bands; i++) {
+ int N = ff_celt_freq_range[i] << f->size;
int prev_extra = extrabits;
- s->pulses[i] += extrabits;
+ f->pulses[i] += extrabits;
if (N > 1) {
int dof; // degrees of freedom
// totalbits/dof
int fine_bits, max_bits;
- extrabits = FFMAX(0, s->pulses[i] - cap[i]);
- s->pulses[i] -= extrabits;
+ extrabits = FFMAX(0, f->pulses[i] - cap[i]);
+ f->pulses[i] -= extrabits;
/* intensity stereo makes use of an extra degree of freedom */
- dof = N * s->coded_channels
- + (s->coded_channels == 2 && N > 2 && !s->dualstereo && i < s->intensitystereo);
- temp = dof * (ff_celt_log_freq_range[i] + (s->duration<<3));
+ dof = N * f->channels
+ + (f->channels == 2 && N > 2 && !f->dual_stereo && i < f->intensity_stereo);
+ temp = dof * (ff_celt_log_freq_range[i] + (f->size<<3));
offset = (temp >> 1) - dof * CELT_FINE_OFFSET;
if (N == 2) /* dof=2 is the only case that doesn't fit the model */
offset += dof<<1;
/* grant an additional bias for the first and second pulses */
- if (s->pulses[i] + offset < 2 * (dof << 3))
+ if (f->pulses[i] + offset < 2 * (dof << 3))
offset += temp >> 2;
- else if (s->pulses[i] + offset < 3 * (dof << 3))
+ else if (f->pulses[i] + offset < 3 * (dof << 3))
offset += temp >> 3;
- fine_bits = (s->pulses[i] + offset + (dof << 2)) / (dof << 3);
- max_bits = FFMIN((s->pulses[i]>>3) >> (s->coded_channels - 1),
+ fine_bits = (f->pulses[i] + offset + (dof << 2)) / (dof << 3);
+ max_bits = FFMIN((f->pulses[i]>>3) >> (f->channels - 1),
CELT_MAX_FINE_BITS);
max_bits = FFMAX(max_bits, 0);
- s->fine_bits[i] = av_clip(fine_bits, 0, max_bits);
+ f->fine_bits[i] = av_clip(fine_bits, 0, max_bits);
/* if fine_bits was rounded down or capped,
give priority for the final fine energy pass */
- s->fine_priority[i] = (s->fine_bits[i] * (dof<<3) >= s->pulses[i] + offset);
+ f->fine_priority[i] = (f->fine_bits[i] * (dof<<3) >= f->pulses[i] + offset);
/* the remaining bits are assigned to PVQ */
- s->pulses[i] -= s->fine_bits[i] << (s->coded_channels - 1) << 3;
+ f->pulses[i] -= f->fine_bits[i] << (f->channels - 1) << 3;
} else {
/* all bits go to fine energy except for the sign bit */
- extrabits = FFMAX(0, s->pulses[i] - (s->coded_channels << 3));
- s->pulses[i] -= extrabits;
- s->fine_bits[i] = 0;
- s->fine_priority[i] = 1;
+ extrabits = FFMAX(0, f->pulses[i] - (f->channels << 3));
+ f->pulses[i] -= extrabits;
+ f->fine_bits[i] = 0;
+ f->fine_priority[i] = 1;
}
/* hand back a limited number of extra fine energy bits to this band */
if (extrabits > 0) {
- int fineextra = FFMIN(extrabits >> (s->coded_channels + 2),
- CELT_MAX_FINE_BITS - s->fine_bits[i]);
- s->fine_bits[i] += fineextra;
+ int fineextra = FFMIN(extrabits >> (f->channels + 2),
+ CELT_MAX_FINE_BITS - f->fine_bits[i]);
+ f->fine_bits[i] += fineextra;
- fineextra <<= s->coded_channels + 2;
- s->fine_priority[i] = (fineextra >= extrabits - prev_extra);
+ fineextra <<= f->channels + 2;
+ f->fine_priority[i] = (fineextra >= extrabits - prev_extra);
extrabits -= fineextra;
}
}
- s->remaining = extrabits;
+ f->remaining = extrabits;
/* skipped bands dedicate all of their bits for fine energy */
- for (; i < s->endband; i++) {
- s->fine_bits[i] = s->pulses[i] >> (s->coded_channels - 1) >> 3;
- s->pulses[i] = 0;
- s->fine_priority[i] = s->fine_bits[i] < 1;
+ for (; i < f->end_band; i++) {
+ f->fine_bits[i] = f->pulses[i] >> (f->channels - 1) >> 3;
+ f->pulses[i] = 0;
+ f->fine_priority[i] = f->fine_bits[i] < 1;
}
}
-static inline int celt_bits2pulses(const uint8_t *cache, int bits)
-{
- // TODO: Find the size of cache and make it into an array in the parameters list
- int i, low = 0, high;
-
- high = cache[0];
- bits--;
-
- for (i = 0; i < 6; i++) {
- int center = (low + high + 1) >> 1;
- if (cache[center] >= bits)
- high = center;
- else
- low = center;
- }
-
- return (bits - (low == 0 ? -1 : cache[low]) <= cache[high] - bits) ? low : high;
-}
-
-static inline int celt_pulses2bits(const uint8_t *cache, int pulses)
-{
- // TODO: Find the size of cache and make it into an array in the parameters list
- return (pulses == 0) ? 0 : cache[pulses] + 1;
-}
-
-static inline void celt_normalize_residual(const int * av_restrict iy, float * av_restrict X,
- int N, float g)
-{
- int i;
- for (i = 0; i < N; i++)
- X[i] = g * iy[i];
-}
-
-static void celt_exp_rotation1(float *X, unsigned int len, unsigned int stride,
- float c, float s)
-{
- float *Xptr;
- int i;
-
- Xptr = X;
- for (i = 0; i < len - stride; i++) {
- float x1, x2;
- x1 = Xptr[0];
- x2 = Xptr[stride];
- Xptr[stride] = c * x2 + s * x1;
- *Xptr++ = c * x1 - s * x2;
- }
-
- Xptr = &X[len - 2 * stride - 1];
- for (i = len - 2 * stride - 1; i >= 0; i--) {
- float x1, x2;
- x1 = Xptr[0];
- x2 = Xptr[stride];
- Xptr[stride] = c * x2 + s * x1;
- *Xptr-- = c * x1 - s * x2;
- }
-}
-
-static inline void celt_exp_rotation(float *X, unsigned int len,
- unsigned int stride, unsigned int K,
- enum CeltSpread spread)
-{
- unsigned int stride2 = 0;
- float c, s;
- float gain, theta;
- int i;
-
- if (2*K >= len || spread == CELT_SPREAD_NONE)
- return;
-
- gain = (float)len / (len + (20 - 5*spread) * K);
- theta = M_PI * gain * gain / 4;
-
- c = cos(theta);
- s = sin(theta);
-
- if (len >= stride << 3) {
- stride2 = 1;
- /* This is just a simple (equivalent) way of computing sqrt(len/stride) with rounding.
- It's basically incrementing long as (stride2+0.5)^2 < len/stride. */
- while ((stride2 * stride2 + stride2) * stride + (stride >> 2) < len)
- stride2++;
- }
-
- /*NOTE: As a minor optimization, we could be passing around log2(B), not B, for both this and for
- extract_collapse_mask().*/
- len /= stride;
- for (i = 0; i < stride; i++) {
- if (stride2)
- celt_exp_rotation1(X + i * len, len, stride2, s, c);
- celt_exp_rotation1(X + i * len, len, 1, c, s);
- }
-}
-
-static inline unsigned int celt_extract_collapse_mask(const int *iy,
- unsigned int N,
- unsigned int B)
-{
- unsigned int collapse_mask;
- int N0;
- int i, j;
-
- if (B <= 1)
- return 1;
-
- /*NOTE: As a minor optimization, we could be passing around log2(B), not B, for both this and for
- exp_rotation().*/
- N0 = N/B;
- collapse_mask = 0;
- for (i = 0; i < B; i++)
- for (j = 0; j < N0; j++)
- collapse_mask |= (iy[i*N0+j]!=0)<<i;
- return collapse_mask;
-}
-
-static inline void celt_renormalize_vector(float *X, int N, float gain)
-{
- int i;
- float g = 1e-15f;
- for (i = 0; i < N; i++)
- g += X[i] * X[i];
- g = gain / sqrtf(g);
-
- for (i = 0; i < N; i++)
- X[i] *= g;
-}
-
-static inline void celt_stereo_merge(float *X, float *Y, float mid, int N)
-{
- int i;
- float xp = 0, side = 0;
- float E[2];
- float mid2;
- float t, gain[2];
-
- /* Compute the norm of X+Y and X-Y as |X|^2 + |Y|^2 +/- sum(xy) */
- for (i = 0; i < N; i++) {
- xp += X[i] * Y[i];
- side += Y[i] * Y[i];
- }
-
- /* Compensating for the mid normalization */
- xp *= mid;
- mid2 = mid;
- E[0] = mid2 * mid2 + side - 2 * xp;
- E[1] = mid2 * mid2 + side + 2 * xp;
- if (E[0] < 6e-4f || E[1] < 6e-4f) {
- for (i = 0; i < N; i++)
- Y[i] = X[i];
- return;
- }
-
- t = E[0];
- gain[0] = 1.0f / sqrtf(t);
- t = E[1];
- gain[1] = 1.0f / sqrtf(t);
-
- for (i = 0; i < N; i++) {
- float value[2];
- /* Apply mid scaling (side is already scaled) */
- value[0] = mid * X[i];
- value[1] = Y[i];
- X[i] = gain[0] * (value[0] - value[1]);
- Y[i] = gain[1] * (value[0] + value[1]);
- }
-}
-
-static void celt_interleave_hadamard(float *tmp, float *X, int N0,
- int stride, int hadamard)
+static void celt_denormalize(CeltFrame *f, CeltBlock *block, float *data)
{
int i, j;
- int N = N0*stride;
- if (hadamard) {
- const uint8_t *ordery = ff_celt_hadamard_ordery + stride - 2;
- for (i = 0; i < stride; i++)
- for (j = 0; j < N0; j++)
- tmp[j*stride+i] = X[ordery[i]*N0+j];
- } else {
- for (i = 0; i < stride; i++)
- for (j = 0; j < N0; j++)
- tmp[j*stride+i] = X[i*N0+j];
- }
+ for (i = f->start_band; i < f->end_band; i++) {
+ float *dst = data + (ff_celt_freq_bands[i] << f->size);
+ float norm = exp2(block->energy[i] + ff_celt_mean_energy[i]);
- for (i = 0; i < N; i++)
- X[i] = tmp[i];
-}
-
-static void celt_deinterleave_hadamard(float *tmp, float *X, int N0,
- int stride, int hadamard)
-{
- int i, j;
- int N = N0*stride;
-
- if (hadamard) {
- const uint8_t *ordery = ff_celt_hadamard_ordery + stride - 2;
- for (i = 0; i < stride; i++)
- for (j = 0; j < N0; j++)
- tmp[ordery[i]*N0+j] = X[j*stride+i];
- } else {
- for (i = 0; i < stride; i++)
- for (j = 0; j < N0; j++)
- tmp[i*N0+j] = X[j*stride+i];
- }
-
- for (i = 0; i < N; i++)
- X[i] = tmp[i];
-}
-
-static void celt_haar1(float *X, int N0, int stride)
-{
- int i, j;
- N0 >>= 1;
- for (i = 0; i < stride; i++) {
- for (j = 0; j < N0; j++) {
- float x0 = X[stride * (2 * j + 0) + i];
- float x1 = X[stride * (2 * j + 1) + i];
- X[stride * (2 * j + 0) + i] = (x0 + x1) * M_SQRT1_2;
- X[stride * (2 * j + 1) + i] = (x0 - x1) * M_SQRT1_2;
- }
- }
-}
-
-static inline int celt_compute_qn(int N, int b, int offset, int pulse_cap,
- int dualstereo)
-{
- int qn, qb;
- int N2 = 2 * N - 1;
- if (dualstereo && N == 2)
- N2--;
-
- /* The upper limit ensures that in a stereo split with itheta==16384, we'll
- * always have enough bits left over to code at least one pulse in the
- * side; otherwise it would collapse, since it doesn't get folded. */
- qb = FFMIN3(b - pulse_cap - (4 << 3), (b + N2 * offset) / N2, 8 << 3);
- qn = (qb < (1 << 3 >> 1)) ? 1 : ((ff_celt_qn_exp2[qb & 0x7] >> (14 - (qb >> 3))) + 1) >> 1 << 1;
- return qn;
-}
-
-// this code was adapted from libopus
-static inline uint64_t celt_cwrsi(unsigned int N, unsigned int K, unsigned int i, int *y)
-{
- uint64_t norm = 0;
- uint32_t p;
- int s, val;
- int k0;
-
- while (N > 2) {
- uint32_t q;
-
- /*Lots of pulses case:*/
- if (K >= N) {
- const uint32_t *row = ff_celt_pvq_u_row[N];
-
- /* Are the pulses in this dimension negative? */
- p = row[K + 1];
- s = -(i >= p);
- i -= p & s;
-
- /*Count how many pulses were placed in this dimension.*/
- k0 = K;
- q = row[N];
- if (q > i) {
- K = N;
- do {
- p = ff_celt_pvq_u_row[--K][N];
- } while (p > i);
- } else
- for (p = row[K]; p > i; p = row[K])
- K--;
-
- i -= p;
- val = (k0 - K + s) ^ s;
- norm += val * val;
- *y++ = val;
- } else { /*Lots of dimensions case:*/
- /*Are there any pulses in this dimension at all?*/
- p = ff_celt_pvq_u_row[K ][N];
- q = ff_celt_pvq_u_row[K + 1][N];
-
- if (p <= i && i < q) {
- i -= p;
- *y++ = 0;
- } else {
- /*Are the pulses in this dimension negative?*/
- s = -(i >= q);
- i -= q & s;
-
- /*Count how many pulses were placed in this dimension.*/
- k0 = K;
- do p = ff_celt_pvq_u_row[--K][N];
- while (p > i);
-
- i -= p;
- val = (k0 - K + s) ^ s;
- norm += val * val;
- *y++ = val;
- }
- }
- N--;
- }
-
- /* N == 2 */
- p = 2 * K + 1;
- s = -(i >= p);
- i -= p & s;
- k0 = K;
- K = (i + 1) / 2;
-
- if (K)
- i -= 2 * K - 1;
-
- val = (k0 - K + s) ^ s;
- norm += val * val;
- *y++ = val;
-
- /* N==1 */
- s = -i;
- val = (K + s) ^ s;
- norm += val * val;
- *y = val;
-
- return norm;
-}
-
-static inline float celt_decode_pulses(OpusRangeCoder *rc, int *y, unsigned int N, unsigned int K)
-{
- unsigned int idx;
-#define CELT_PVQ_U(n, k) (ff_celt_pvq_u_row[FFMIN(n, k)][FFMAX(n, k)])
-#define CELT_PVQ_V(n, k) (CELT_PVQ_U(n, k) + CELT_PVQ_U(n, (k) + 1))
- idx = ff_opus_rc_dec_uint(rc, CELT_PVQ_V(N, K));
- return celt_cwrsi(N, K, idx, y);
-}
-
-/** Decode pulse vector and combine the result with the pitch vector to produce
- the final normalised signal in the current band. */
-static inline unsigned int celt_alg_unquant(OpusRangeCoder *rc, float *X,
- unsigned int N, unsigned int K,
- enum CeltSpread spread,
- unsigned int blocks, float gain)
-{
- int y[176];
-
- gain /= sqrtf(celt_decode_pulses(rc, y, N, K));
- celt_normalize_residual(y, X, N, gain);
- celt_exp_rotation(X, N, blocks, K, spread);
- return celt_extract_collapse_mask(y, N, blocks);
-}
-
-static unsigned int celt_decode_band(CeltContext *s, OpusRangeCoder *rc,
- const int band, float *X, float *Y,
- int N, int b, unsigned int blocks,
- float *lowband, int duration,
- float *lowband_out, int level,
- float gain, float *lowband_scratch,
- int fill)
-{
- const uint8_t *cache;
- int dualstereo, split;
- int imid = 0, iside = 0;
- unsigned int N0 = N;
- int N_B;
- int N_B0;
- int B0 = blocks;
- int time_divide = 0;
- int recombine = 0;
- int inv = 0;
- float mid = 0, side = 0;
- int longblocks = (B0 == 1);
- unsigned int cm = 0;
-
- N_B0 = N_B = N / blocks;
- split = dualstereo = (Y != NULL);
-
- if (N == 1) {
- /* special case for one sample */
- int i;
- float *x = X;
- for (i = 0; i <= dualstereo; i++) {
- int sign = 0;
- if (s->remaining2 >= 1<<3) {
- sign = ff_opus_rc_get_raw(rc, 1);
- s->remaining2 -= 1 << 3;
- b -= 1 << 3;
- }
- x[0] = sign ? -1.0f : 1.0f;
- x = Y;
- }
- if (lowband_out)
- lowband_out[0] = X[0];
- return 1;
- }
-
- if (!dualstereo && level == 0) {
- int tf_change = s->tf_change[band];
- int k;
- if (tf_change > 0)
- recombine = tf_change;
- /* Band recombining to increase frequency resolution */
-
- 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];
- lowband = lowband_scratch;
- }
-
- for (k = 0; k < recombine; k++) {
- if (lowband)
- celt_haar1(lowband, N >> k, 1 << k);
- fill = ff_celt_bit_interleave[fill & 0xF] | ff_celt_bit_interleave[fill >> 4] << 2;
- }
- blocks >>= recombine;
- N_B <<= recombine;
-
- /* Increasing the time resolution */
- while ((N_B & 1) == 0 && tf_change < 0) {
- if (lowband)
- celt_haar1(lowband, N_B, blocks);
- fill |= fill << blocks;
- blocks <<= 1;
- N_B >>= 1;
- time_divide++;
- tf_change++;
- }
- B0 = blocks;
- N_B0 = N_B;
-
- /* Reorganize the samples in time order instead of frequency order */
- if (B0 > 1 && lowband)
- celt_deinterleave_hadamard(s->scratch, lowband, N_B >> recombine,
- B0 << recombine, longblocks);
- }
-
- /* 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) {
- N >>= 1;
- Y = X + N;
- split = 1;
- duration -= 1;
- if (blocks == 1)
- fill = (fill & 1) | (fill << 1);
- blocks = (blocks + 1) >> 1;
- }
-
- if (split) {
- int qn;
- int itheta = 0;
- int mbits, sbits, delta;
- int qalloc;
- int pulse_cap;
- int offset;
- int orig_fill;
- int tell;
-
- /* 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 :
- CELT_QTHETA_OFFSET);
- qn = (dualstereo && band >= s->intensitystereo) ? 1 :
- celt_compute_qn(N, b, offset, pulse_cap, dualstereo);
- tell = opus_rc_tell_frac(rc);
- if (qn != 1) {
- /* 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)
- itheta = ff_opus_rc_dec_uint_step(rc, qn/2);
- else if (dualstereo || B0 > 1)
- itheta = ff_opus_rc_dec_uint(rc, qn+1);
- else
- itheta = ff_opus_rc_dec_uint_tri(rc, qn);
- itheta = itheta * 16384 / qn;
- /* NOTE: Renormalising X and Y *may* help fixed-point a bit at very high rate.
- Let's do that at higher complexity */
- } else if (dualstereo) {
- inv = (b > 2 << 3 && s->remaining2 > 2 << 3) ? ff_opus_rc_dec_log(rc, 2) : 0;
- itheta = 0;
- }
- qalloc = opus_rc_tell_frac(rc) - tell;
- b -= qalloc;
-
- orig_fill = fill;
- if (itheta == 0) {
- imid = 32767;
- iside = 0;
- fill = av_mod_uintp2(fill, blocks);
- delta = -16384;
- } else if (itheta == 16384) {
- imid = 0;
- iside = 32767;
- fill &= ((1 << blocks) - 1) << blocks;
- delta = 16384;
- } else {
- imid = celt_cos(itheta);
- iside = celt_cos(16384-itheta);
- /* This is the mid vs side allocation that minimizes squared error
- in that band. */
- delta = ROUND_MUL16((N - 1) << 7, celt_log2tan(iside, imid));
- }
-
- mid = imid / 32768.0f;
- side = iside / 32768.0f;
-
- /* 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) {
- int c;
- int sign = 0;
- float tmp;
- float *x2, *y2;
- mbits = b;
- /* Only need one bit for the side */
- sbits = (itheta != 0 && itheta != 16384) ? 1 << 3 : 0;
- mbits -= sbits;
- c = (itheta > 8192);
- s->remaining2 -= qalloc+sbits;
-
- x2 = c ? Y : X;
- y2 = c ? X : Y;
- if (sbits)
- sign = ff_opus_rc_get_raw(rc, 1);
- sign = 1 - 2 * sign;
- /* We use orig_fill here because we want to fold the side, but if
- itheta==16384, we'll have cleared the low bits of fill. */
- cm = celt_decode_band(s, rc, band, x2, NULL, N, mbits, blocks,
- lowband, duration, lowband_out, level, gain,
- lowband_scratch, orig_fill);
- /* We don't split N=2 bands, so cm is either 1 or 0 (for a fold-collapse),
- and there's no need to worry about mixing with the other channel. */
- y2[0] = -sign * x2[1];
- y2[1] = sign * x2[0];
- X[0] *= mid;
- X[1] *= mid;
- Y[0] *= side;
- Y[1] *= side;
- tmp = X[0];
- X[0] = tmp - Y[0];
- Y[0] = tmp + Y[0];
- tmp = X[1];
- X[1] = tmp - Y[1];
- Y[1] = tmp + Y[1];
- } else {
- /* "Normal" split code */
- float *next_lowband2 = NULL;
- float *next_lowband_out1 = NULL;
- int next_level = 0;
- int rebalance;
-
- /* Give more bits to low-energy MDCTs than they would
- * otherwise deserve */
- if (B0 > 1 && !dualstereo && (itheta & 0x3fff)) {
- if (itheta > 8192)
- /* Rough approximation for pre-echo masking */
- delta -= delta >> (4 - duration);
- else
- /* Corresponds to a forward-masking slope of
- * 1.5 dB per 10 ms */
- delta = FFMIN(0, delta + (N << 3 >> (5 - duration)));
- }
- mbits = av_clip((b - delta) / 2, 0, b);
- sbits = b - mbits;
- s->remaining2 -= qalloc;
-
- if (lowband && !dualstereo)
- 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)
- next_lowband_out1 = lowband_out;
- else
- next_level = level + 1;
-
- rebalance = s->remaining2;
- if (mbits >= sbits) {
- /* In stereo mode, we do not apply a scaling to the mid
- * because we need the normalized mid for folding later */
- cm = celt_decode_band(s, rc, band, X, NULL, N, mbits, blocks,
- lowband, duration, next_lowband_out1,
- next_level, dualstereo ? 1.0f : (gain * mid),
- lowband_scratch, fill);
-
- rebalance = mbits - (rebalance - s->remaining2);
- if (rebalance > 3 << 3 && itheta != 0)
- sbits += rebalance - (3 << 3);
-
- /* For a stereo split, the high bits of fill are always zero,
- * so no folding will be done to the side. */
- cm |= celt_decode_band(s, rc, band, Y, NULL, N, sbits, blocks,
- next_lowband2, duration, NULL,
- next_level, gain * side, NULL,
- fill >> blocks) << ((B0 >> 1) & (dualstereo - 1));
- } else {
- /* For a stereo split, the high bits of fill are always zero,
- * so no folding will be done to the side. */
- cm = celt_decode_band(s, rc, band, Y, NULL, N, sbits, blocks,
- next_lowband2, duration, NULL,
- next_level, gain * side, NULL,
- fill >> blocks) << ((B0 >> 1) & (dualstereo - 1));
-
- rebalance = sbits - (rebalance - s->remaining2);
- if (rebalance > 3 << 3 && itheta != 16384)
- mbits += rebalance - (3 << 3);
-
- /* In stereo mode, we do not apply a scaling to the mid because
- * we need the normalized mid for folding later */
- cm |= celt_decode_band(s, rc, band, X, NULL, N, mbits, blocks,
- lowband, duration, next_lowband_out1,
- next_level, dualstereo ? 1.0f : (gain * mid),
- lowband_scratch, fill);
- }
- }
- } else {
- /* This is the basic no-split case */
- unsigned int q = celt_bits2pulses(cache, b);
- unsigned int curr_bits = celt_pulses2bits(cache, q);
- s->remaining2 -= curr_bits;
-
- /* Ensures we can never bust the budget */
- while (s->remaining2 < 0 && q > 0) {
- s->remaining2 += curr_bits;
- curr_bits = celt_pulses2bits(cache, --q);
- s->remaining2 -= curr_bits;
- }
-
- if (q != 0) {
- /* Finally do the actual quantization */
- cm = celt_alg_unquant(rc, X, N, (q < 8) ? q : (8 + (q & 7)) << ((q >> 3) - 1),
- s->spread, blocks, gain);
- } else {
- /* If there's no pulse, fill the band anyway */
- int j;
- unsigned int cm_mask = (1 << blocks) - 1;
- fill &= cm_mask;
- if (!fill) {
- for (j = 0; j < N; j++)
- X[j] = 0.0f;
- } else {
- if (!lowband) {
- /* Noise */
- for (j = 0; j < N; j++)
- X[j] = (((int32_t)celt_rng(s)) >> 20);
- cm = cm_mask;
- } else {
- /* Folded spectrum */
- for (j = 0; j < N; j++) {
- /* About 48 dB below the "normal" folding level */
- X[j] = lowband[j] + (((celt_rng(s)) & 0x8000) ? 1.0f / 256 : -1.0f / 256);
- }
- cm = fill;
- }
- celt_renormalize_vector(X, N, gain);
- }
- }
- }
-
- /* This code is used by the decoder and by the resynthesis-enabled encoder */
- if (dualstereo) {
- int j;
- if (N != 2)
- celt_stereo_merge(X, Y, mid, N);
- if (inv) {
- for (j = 0; j < N; j++)
- Y[j] *= -1;
- }
- } else if (level == 0) {
- int k;
-
- /* Undo the sample reorganization going from time order to frequency order */
- if (B0 > 1)
- celt_interleave_hadamard(s->scratch, X, N_B>>recombine,
- B0<<recombine, longblocks);
-
- /* Undo time-freq changes that we did earlier */
- N_B = N_B0;
- blocks = B0;
- for (k = 0; k < time_divide; k++) {
- blocks >>= 1;
- N_B <<= 1;
- cm |= cm >> blocks;
- celt_haar1(X, N_B, blocks);
- }
-
- for (k = 0; k < recombine; k++) {
- cm = ff_celt_bit_deinterleave[cm];
- celt_haar1(X, N0>>k, 1<<k);
- }
- blocks <<= recombine;
-
- /* 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];
- }
- cm = av_mod_uintp2(cm, blocks);
- }
- return cm;
-}
-
-static void celt_denormalize(CeltContext *s, CeltFrame *frame, float *data)
-{
- int i, j;
-
- for (i = s->startband; i < s->endband; i++) {
- float *dst = data + (ff_celt_freq_bands[i] << s->duration);
- float norm = exp2(frame->energy[i] + ff_celt_mean_energy[i]);
-
- for (j = 0; j < ff_celt_freq_range[i] << s->duration; j++)
+ for (j = 0; j < ff_celt_freq_range[i] << f->size; j++)
dst[j] *= norm;
}
}
-static void celt_postfilter_apply_transition(CeltFrame *frame, float *data)
+static void celt_postfilter_apply_transition(CeltBlock *block, float *data)
{
- const int T0 = frame->pf_period_old;
- const int T1 = frame->pf_period;
+ const int T0 = block->pf_period_old;
+ const int T1 = block->pf_period;
float g00, g01, g02;
float g10, g11, g12;
int i;
- if (frame->pf_gains[0] == 0.0 &&
- frame->pf_gains_old[0] == 0.0)
+ if (block->pf_gains[0] == 0.0 &&
+ block->pf_gains_old[0] == 0.0)
return;
- g00 = frame->pf_gains_old[0];
- g01 = frame->pf_gains_old[1];
- g02 = frame->pf_gains_old[2];
- g10 = frame->pf_gains[0];
- g11 = frame->pf_gains[1];
- g12 = frame->pf_gains[2];
+ g00 = block->pf_gains_old[0];
+ g01 = block->pf_gains_old[1];
+ g02 = block->pf_gains_old[2];
+ g10 = block->pf_gains[0];
+ g11 = block->pf_gains[1];
+ g12 = block->pf_gains[2];
x1 = data[-T1 + 1];
x2 = data[-T1];
}
}
-static void celt_postfilter_apply(CeltFrame *frame,
- float *data, int len)
+static void celt_postfilter_apply(CeltBlock *block, float *data, int len)
{
- const int T = frame->pf_period;
+ const int T = block->pf_period;
float g0, g1, g2;
float x0, x1, x2, x3, x4;
int i;
- if (frame->pf_gains[0] == 0.0 || len <= 0)
+ if (block->pf_gains[0] == 0.0 || len <= 0)
return;
- g0 = frame->pf_gains[0];
- g1 = frame->pf_gains[1];
- g2 = frame->pf_gains[2];
+ g0 = block->pf_gains[0];
+ g1 = block->pf_gains[1];
+ g2 = block->pf_gains[2];
x4 = data[-T - 2];
x3 = data[-T - 1];
}
}
-static void celt_postfilter(CeltContext *s, CeltFrame *frame)
+static void celt_postfilter(CeltFrame *f, CeltBlock *block)
{
- int len = s->blocksize * s->blocks;
+ int len = f->blocksize * f->blocks;
- celt_postfilter_apply_transition(frame, frame->buf + 1024);
+ celt_postfilter_apply_transition(block, block->buf + 1024);
- frame->pf_period_old = frame->pf_period;
- memcpy(frame->pf_gains_old, frame->pf_gains, sizeof(frame->pf_gains));
+ block->pf_period_old = block->pf_period;
+ memcpy(block->pf_gains_old, block->pf_gains, sizeof(block->pf_gains));
- frame->pf_period = frame->pf_period_new;
- memcpy(frame->pf_gains, frame->pf_gains_new, sizeof(frame->pf_gains));
+ block->pf_period = block->pf_period_new;
+ memcpy(block->pf_gains, block->pf_gains_new, sizeof(block->pf_gains));
if (len > CELT_OVERLAP) {
- celt_postfilter_apply_transition(frame, frame->buf + 1024 + CELT_OVERLAP);
- celt_postfilter_apply(frame, frame->buf + 1024 + 2 * CELT_OVERLAP,
+ celt_postfilter_apply_transition(block, block->buf + 1024 + CELT_OVERLAP);
+ celt_postfilter_apply(block, block->buf + 1024 + 2 * CELT_OVERLAP,
len - 2 * CELT_OVERLAP);
- frame->pf_period_old = frame->pf_period;
- memcpy(frame->pf_gains_old, frame->pf_gains, sizeof(frame->pf_gains));
+ block->pf_period_old = block->pf_period;
+ memcpy(block->pf_gains_old, block->pf_gains, sizeof(block->pf_gains));
}
- memmove(frame->buf, frame->buf + len, (1024 + CELT_OVERLAP / 2) * sizeof(float));
+ memmove(block->buf, block->buf + len, (1024 + CELT_OVERLAP / 2) * sizeof(float));
}
-static int parse_postfilter(CeltContext *s, OpusRangeCoder *rc, int consumed)
+static int parse_postfilter(CeltFrame *f, OpusRangeCoder *rc, int consumed)
{
static const float postfilter_taps[3][3] = {
{ 0.3066406250f, 0.2170410156f, 0.1296386719f },
};
int i;
- memset(s->frame[0].pf_gains_new, 0, sizeof(s->frame[0].pf_gains_new));
- memset(s->frame[1].pf_gains_new, 0, sizeof(s->frame[1].pf_gains_new));
+ memset(f->block[0].pf_gains_new, 0, sizeof(f->block[0].pf_gains_new));
+ memset(f->block[1].pf_gains_new, 0, sizeof(f->block[1].pf_gains_new));
- if (s->startband == 0 && consumed + 16 <= s->framebits) {
+ if (f->start_band == 0 && consumed + 16 <= f->framebits) {
int has_postfilter = ff_opus_rc_dec_log(rc, 1);
if (has_postfilter) {
float gain;
octave = ff_opus_rc_dec_uint(rc, 6);
period = (16 << octave) + ff_opus_rc_get_raw(rc, 4 + octave) - 1;
gain = 0.09375f * (ff_opus_rc_get_raw(rc, 3) + 1);
- tapset = (opus_rc_tell(rc) + 2 <= s->framebits) ?
+ tapset = (opus_rc_tell(rc) + 2 <= f->framebits) ?
ff_opus_rc_dec_cdf(rc, ff_celt_model_tapset) : 0;
for (i = 0; i < 2; i++) {
- CeltFrame *frame = &s->frame[i];
+ CeltBlock *block = &f->block[i];
- frame->pf_period_new = FFMAX(period, CELT_POSTFILTER_MINPERIOD);
- frame->pf_gains_new[0] = gain * postfilter_taps[tapset][0];
- frame->pf_gains_new[1] = gain * postfilter_taps[tapset][1];
- frame->pf_gains_new[2] = gain * postfilter_taps[tapset][2];
+ block->pf_period_new = FFMAX(period, CELT_POSTFILTER_MINPERIOD);
+ block->pf_gains_new[0] = gain * postfilter_taps[tapset][0];
+ block->pf_gains_new[1] = gain * postfilter_taps[tapset][1];
+ block->pf_gains_new[2] = gain * postfilter_taps[tapset][2];
}
}
return consumed;
}
-static void process_anticollapse(CeltContext *s, CeltFrame *frame, float *X)
+static void process_anticollapse(CeltFrame *f, CeltBlock *block, float *X)
{
int i, j, k;
- for (i = s->startband; i < s->endband; i++) {
+ for (i = f->start_band; i < f->end_band; i++) {
int renormalize = 0;
float *xptr;
float prev[2];
int depth;
/* depth in 1/8 bits */
- depth = (1 + s->pulses[i]) / (ff_celt_freq_range[i] << s->duration);
+ depth = (1 + f->pulses[i]) / (ff_celt_freq_range[i] << f->size);
thresh = exp2f(-1.0 - 0.125f * depth);
- sqrt_1 = 1.0f / sqrtf(ff_celt_freq_range[i] << s->duration);
+ sqrt_1 = 1.0f / sqrtf(ff_celt_freq_range[i] << f->size);
- xptr = X + (ff_celt_freq_bands[i] << s->duration);
+ xptr = X + (ff_celt_freq_bands[i] << f->size);
- prev[0] = frame->prev_energy[0][i];
- prev[1] = frame->prev_energy[1][i];
- if (s->coded_channels == 1) {
- CeltFrame *frame1 = &s->frame[1];
+ prev[0] = block->prev_energy[0][i];
+ prev[1] = block->prev_energy[1][i];
+ if (f->channels == 1) {
+ CeltBlock *block1 = &f->block[1];
- prev[0] = FFMAX(prev[0], frame1->prev_energy[0][i]);
- prev[1] = FFMAX(prev[1], frame1->prev_energy[1][i]);
+ prev[0] = FFMAX(prev[0], block1->prev_energy[0][i]);
+ prev[1] = FFMAX(prev[1], block1->prev_energy[1][i]);
}
- Ediff = frame->energy[i] - FFMIN(prev[0], prev[1]);
+ Ediff = block->energy[i] - FFMIN(prev[0], prev[1]);
Ediff = FFMAX(0, Ediff);
/* r needs to be multiplied by 2 or 2*sqrt(2) depending on LM because
short blocks don't have the same energy as long */
r = exp2(1 - Ediff);
- if (s->duration == 3)
+ if (f->size == 3)
r *= M_SQRT2;
r = FFMIN(thresh, r) * sqrt_1;
- for (k = 0; k < 1 << s->duration; k++) {
+ for (k = 0; k < 1 << f->size; k++) {
/* Detect collapse */
- if (!(frame->collapse_masks[i] & 1 << k)) {
+ if (!(block->collapse_masks[i] & 1 << k)) {
/* Fill with noise */
for (j = 0; j < ff_celt_freq_range[i]; j++)
- xptr[(j << s->duration) + k] = (celt_rng(s) & 0x8000) ? r : -r;
+ xptr[(j << f->size) + k] = (celt_rng(f) & 0x8000) ? r : -r;
renormalize = 1;
}
}
/* We just added some energy, so we need to renormalize */
if (renormalize)
- celt_renormalize_vector(xptr, ff_celt_freq_range[i] << s->duration, 1.0f);
+ celt_renormalize_vector(xptr, ff_celt_freq_range[i] << f->size, 1.0f);
}
}
-static void celt_decode_bands(CeltContext *s, OpusRangeCoder *rc)
+static void celt_decode_bands(CeltFrame *f, OpusRangeCoder *rc)
{
float lowband_scratch[8 * 22];
float norm[2 * 8 * 100];
- int totalbits = (s->framebits << 3) - s->anticollapse_bit;
+ int totalbits = (f->framebits << 3) - f->anticollapse_needed;
int update_lowband = 1;
int lowband_offset = 0;
int i, j;
- memset(s->coeffs, 0, sizeof(s->coeffs));
+ memset(f->block[0].coeffs, 0, sizeof(f->block[0].coeffs));
+ memset(f->block[1].coeffs, 0, sizeof(f->block[0].coeffs));
- for (i = s->startband; i < s->endband; i++) {
- int band_offset = ff_celt_freq_bands[i] << s->duration;
- int band_size = ff_celt_freq_range[i] << s->duration;
- float *X = s->coeffs[0] + band_offset;
- float *Y = (s->coded_channels == 2) ? s->coeffs[1] + band_offset : NULL;
+ for (i = f->start_band; i < f->end_band; i++) {
+ int band_offset = ff_celt_freq_bands[i] << f->size;
+ int band_size = ff_celt_freq_range[i] << f->size;
+ float *X = f->block[0].coeffs + band_offset;
+ float *Y = (f->channels == 2) ? f->block[1].coeffs + band_offset : NULL;
int consumed = opus_rc_tell_frac(rc);
float *norm2 = norm + 8 * 100;
int b;
/* Compute how many bits we want to allocate to this band */
- if (i != s->startband)
- s->remaining -= consumed;
- s->remaining2 = totalbits - consumed - 1;
- if (i <= s->codedbands - 1) {
- int curr_balance = s->remaining / FFMIN(3, s->codedbands-i);
- b = av_clip_uintp2(FFMIN(s->remaining2 + 1, s->pulses[i] + curr_balance), 14);
+ if (i != f->start_band)
+ f->remaining -= consumed;
+ f->remaining2 = totalbits - consumed - 1;
+ if (i <= f->coded_bands - 1) {
+ int curr_balance = f->remaining / FFMIN(3, f->coded_bands-i);
+ b = av_clip_uintp2(FFMIN(f->remaining2 + 1, f->pulses[i] + curr_balance), 14);
} else
b = 0;
- if (ff_celt_freq_bands[i] - ff_celt_freq_range[i] >= ff_celt_freq_bands[s->startband] &&
+ if (ff_celt_freq_bands[i] - ff_celt_freq_range[i] >= ff_celt_freq_bands[f->start_band] &&
(update_lowband || lowband_offset == 0))
lowband_offset = i;
/* Get a conservative estimate of the collapse_mask's for the bands we're
going to be folding from. */
- if (lowband_offset != 0 && (s->spread != CELT_SPREAD_AGGRESSIVE ||
- s->blocks > 1 || s->tf_change[i] < 0)) {
+ if (lowband_offset != 0 && (f->spread != CELT_SPREAD_AGGRESSIVE ||
+ f->blocks > 1 || f->tf_change[i] < 0)) {
int foldstart, foldend;
/* This ensures we never repeat spectral content within one band */
- effective_lowband = FFMAX(ff_celt_freq_bands[s->startband],
+ effective_lowband = FFMAX(ff_celt_freq_bands[f->start_band],
ff_celt_freq_bands[lowband_offset] - ff_celt_freq_range[i]);
foldstart = lowband_offset;
while (ff_celt_freq_bands[--foldstart] > effective_lowband);
cm[0] = cm[1] = 0;
for (j = foldstart; j < foldend; j++) {
- cm[0] |= s->frame[0].collapse_masks[j];
- cm[1] |= s->frame[s->coded_channels - 1].collapse_masks[j];
+ cm[0] |= f->block[0].collapse_masks[j];
+ cm[1] |= f->block[f->channels - 1].collapse_masks[j];
}
} else
/* Otherwise, we'll be using the LCG to fold, so all blocks will (almost
always) be non-zero.*/
- cm[0] = cm[1] = (1 << s->blocks) - 1;
+ cm[0] = cm[1] = (1 << f->blocks) - 1;
- if (s->dualstereo && i == s->intensitystereo) {
+ if (f->dual_stereo && i == f->intensity_stereo) {
/* Switch off dual stereo to do intensity */
- s->dualstereo = 0;
- for (j = ff_celt_freq_bands[s->startband] << s->duration; j < band_offset; j++)
+ f->dual_stereo = 0;
+ for (j = ff_celt_freq_bands[f->start_band] << f->size; j < band_offset; j++)
norm[j] = (norm[j] + norm2[j]) / 2;
}
- if (s->dualstereo) {
- cm[0] = celt_decode_band(s, rc, i, X, NULL, band_size, b / 2, s->blocks,
- effective_lowband != -1 ? norm + (effective_lowband << s->duration) : NULL, s->duration,
- norm + band_offset, 0, 1.0f, lowband_scratch, cm[0]);
+ if (f->dual_stereo) {
+ cm[0] = ff_celt_decode_band(f, rc, i, X, NULL, band_size, b / 2, f->blocks,
+ effective_lowband != -1 ? norm + (effective_lowband << f->size) : NULL, f->size,
+ norm + band_offset, 0, 1.0f, lowband_scratch, cm[0]);
- cm[1] = celt_decode_band(s, rc, i, Y, NULL, band_size, b/2, s->blocks,
- effective_lowband != -1 ? norm2 + (effective_lowband << s->duration) : NULL, s->duration,
- norm2 + band_offset, 0, 1.0f, lowband_scratch, cm[1]);
+ cm[1] = ff_celt_decode_band(f, rc, i, Y, NULL, band_size, b/2, f->blocks,
+ effective_lowband != -1 ? norm2 + (effective_lowband << f->size) : NULL, f->size,
+ norm2 + band_offset, 0, 1.0f, lowband_scratch, cm[1]);
} else {
- cm[0] = celt_decode_band(s, rc, i, X, Y, band_size, b, s->blocks,
- effective_lowband != -1 ? norm + (effective_lowband << s->duration) : NULL, s->duration,
- norm + band_offset, 0, 1.0f, lowband_scratch, cm[0]|cm[1]);
-
+ cm[0] = ff_celt_decode_band(f, rc, i, X, Y, band_size, b, f->blocks,
+ effective_lowband != -1 ? norm + (effective_lowband << f->size) : NULL, f->size,
+ norm + band_offset, 0, 1.0f, lowband_scratch, cm[0]|cm[1]);
cm[1] = cm[0];
}
- s->frame[0].collapse_masks[i] = (uint8_t)cm[0];
- s->frame[s->coded_channels - 1].collapse_masks[i] = (uint8_t)cm[1];
- s->remaining += s->pulses[i] + consumed;
+ f->block[0].collapse_masks[i] = (uint8_t)cm[0];
+ f->block[f->channels - 1].collapse_masks[i] = (uint8_t)cm[1];
+ f->remaining += f->pulses[i] + consumed;
/* Update the folding position only as long as we have 1 bit/sample depth */
update_lowband = (b > band_size << 3);
}
}
-int ff_celt_decode_frame(CeltContext *s, OpusRangeCoder *rc,
- float **output, int coded_channels, int frame_size,
- int startband, int endband)
+int ff_celt_decode_frame(CeltFrame *f, OpusRangeCoder *rc,
+ float **output, int channels, int frame_size,
+ int start_band, int end_band)
{
int i, j;
-
int consumed; // bits of entropy consumed thus far for this frame
- int silence = 0;
- int transient = 0;
- int anticollapse = 0;
- IMDCT15Context *imdct;
+ MDCT15Context *imdct;
float imdct_scale = 1.0;
- if (coded_channels != 1 && coded_channels != 2) {
- av_log(s->avctx, AV_LOG_ERROR, "Invalid number of coded channels: %d\n",
- coded_channels);
+ if (channels != 1 && channels != 2) {
+ av_log(f->avctx, AV_LOG_ERROR, "Invalid number of coded channels: %d\n",
+ channels);
return AVERROR_INVALIDDATA;
}
- if (startband < 0 || startband > endband || endband > CELT_MAX_BANDS) {
- av_log(s->avctx, AV_LOG_ERROR, "Invalid start/end band: %d %d\n",
- startband, endband);
+ if (start_band < 0 || start_band > end_band || end_band > CELT_MAX_BANDS) {
+ av_log(f->avctx, AV_LOG_ERROR, "Invalid start/end band: %d %d\n",
+ start_band, end_band);
return AVERROR_INVALIDDATA;
}
- s->flushed = 0;
- s->coded_channels = coded_channels;
- s->startband = startband;
- s->endband = endband;
- s->framebits = rc->rb.bytes * 8;
-
- s->duration = av_log2(frame_size / CELT_SHORT_BLOCKSIZE);
- if (s->duration > CELT_MAX_LOG_BLOCKS ||
- frame_size != CELT_SHORT_BLOCKSIZE * (1 << s->duration)) {
- av_log(s->avctx, AV_LOG_ERROR, "Invalid CELT frame size: %d\n",
+ f->silence = 0;
+ f->transient = 0;
+ f->anticollapse = 0;
+ f->flushed = 0;
+ f->channels = channels;
+ f->start_band = start_band;
+ f->end_band = end_band;
+ f->framebits = rc->rb.bytes * 8;
+
+ f->size = av_log2(frame_size / CELT_SHORT_BLOCKSIZE);
+ if (f->size > CELT_MAX_LOG_BLOCKS ||
+ frame_size != CELT_SHORT_BLOCKSIZE * (1 << f->size)) {
+ av_log(f->avctx, AV_LOG_ERROR, "Invalid CELT frame size: %d\n",
frame_size);
return AVERROR_INVALIDDATA;
}
- if (!s->output_channels)
- s->output_channels = coded_channels;
+ if (!f->output_channels)
+ f->output_channels = channels;
- memset(s->frame[0].collapse_masks, 0, sizeof(s->frame[0].collapse_masks));
- memset(s->frame[1].collapse_masks, 0, sizeof(s->frame[1].collapse_masks));
+ memset(f->block[0].collapse_masks, 0, sizeof(f->block[0].collapse_masks));
+ memset(f->block[1].collapse_masks, 0, sizeof(f->block[1].collapse_masks));
consumed = opus_rc_tell(rc);
/* obtain silence flag */
- if (consumed >= s->framebits)
- silence = 1;
+ if (consumed >= f->framebits)
+ f->silence = 1;
else if (consumed == 1)
- silence = ff_opus_rc_dec_log(rc, 15);
+ f->silence = ff_opus_rc_dec_log(rc, 15);
- if (silence) {
- consumed = s->framebits;
- rc->total_read_bits += s->framebits - opus_rc_tell(rc);
+ if (f->silence) {
+ consumed = f->framebits;
+ rc->total_bits += f->framebits - opus_rc_tell(rc);
}
/* obtain post-filter options */
- consumed = parse_postfilter(s, rc, consumed);
+ consumed = parse_postfilter(f, rc, consumed);
/* obtain transient flag */
- if (s->duration != 0 && consumed+3 <= s->framebits)
- transient = ff_opus_rc_dec_log(rc, 3);
+ if (f->size != 0 && consumed+3 <= f->framebits)
+ f->transient = ff_opus_rc_dec_log(rc, 3);
- s->blocks = transient ? 1 << s->duration : 1;
- s->blocksize = frame_size / s->blocks;
+ f->blocks = f->transient ? 1 << f->size : 1;
+ f->blocksize = frame_size / f->blocks;
- imdct = s->imdct[transient ? 0 : s->duration];
+ imdct = f->imdct[f->transient ? 0 : f->size];
- if (coded_channels == 1) {
+ if (channels == 1) {
for (i = 0; i < CELT_MAX_BANDS; i++)
- s->frame[0].energy[i] = FFMAX(s->frame[0].energy[i], s->frame[1].energy[i]);
+ f->block[0].energy[i] = FFMAX(f->block[0].energy[i], f->block[1].energy[i]);
}
- celt_decode_coarse_energy(s, rc);
- celt_decode_tf_changes (s, rc, transient);
- celt_decode_allocation (s, rc);
- celt_decode_fine_energy (s, rc);
- celt_decode_bands (s, rc);
+ celt_decode_coarse_energy(f, rc);
+ celt_decode_tf_changes (f, rc);
+ celt_decode_allocation (f, rc);
+ celt_decode_fine_energy (f, rc);
+ celt_decode_bands (f, rc);
- if (s->anticollapse_bit)
- anticollapse = ff_opus_rc_get_raw(rc, 1);
+ if (f->anticollapse_needed)
+ f->anticollapse = ff_opus_rc_get_raw(rc, 1);
- celt_decode_final_energy(s, rc, s->framebits - opus_rc_tell(rc));
+ celt_decode_final_energy(f, rc);
/* apply anti-collapse processing and denormalization to
* each coded channel */
- for (i = 0; i < s->coded_channels; i++) {
- CeltFrame *frame = &s->frame[i];
+ for (i = 0; i < f->channels; i++) {
+ CeltBlock *block = &f->block[i];
- if (anticollapse)
- process_anticollapse(s, frame, s->coeffs[i]);
+ if (f->anticollapse)
+ process_anticollapse(f, block, f->block[i].coeffs);
- celt_denormalize(s, frame, s->coeffs[i]);
+ celt_denormalize(f, block, f->block[i].coeffs);
}
/* stereo -> mono downmix */
- if (s->output_channels < s->coded_channels) {
- s->dsp->vector_fmac_scalar(s->coeffs[0], s->coeffs[1], 1.0, FFALIGN(frame_size, 16));
+ if (f->output_channels < f->channels) {
+ f->dsp->vector_fmac_scalar(f->block[0].coeffs, f->block[1].coeffs, 1.0, FFALIGN(frame_size, 16));
imdct_scale = 0.5;
- } else if (s->output_channels > s->coded_channels)
- memcpy(s->coeffs[1], s->coeffs[0], frame_size * sizeof(float));
+ } else if (f->output_channels > f->channels)
+ memcpy(f->block[1].coeffs, f->block[0].coeffs, frame_size * sizeof(float));
- if (silence) {
+ if (f->silence) {
for (i = 0; i < 2; i++) {
- CeltFrame *frame = &s->frame[i];
+ CeltBlock *block = &f->block[i];
- for (j = 0; j < FF_ARRAY_ELEMS(frame->energy); j++)
- frame->energy[j] = CELT_ENERGY_SILENCE;
+ for (j = 0; j < FF_ARRAY_ELEMS(block->energy); j++)
+ block->energy[j] = CELT_ENERGY_SILENCE;
}
- memset(s->coeffs, 0, sizeof(s->coeffs));
+ memset(f->block[0].coeffs, 0, sizeof(f->block[0].coeffs));
+ memset(f->block[1].coeffs, 0, sizeof(f->block[1].coeffs));
}
/* transform and output for each output channel */
- for (i = 0; i < s->output_channels; i++) {
- CeltFrame *frame = &s->frame[i];
- float m = frame->deemph_coeff;
+ 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 < s->blocks; j++) {
- float *dst = frame->buf + 1024 + j * s->blocksize;
+ for (j = 0; j < f->blocks; j++) {
+ float *dst = block->buf + 1024 + j * f->blocksize;
- imdct->imdct_half(imdct, dst + CELT_OVERLAP / 2, s->coeffs[i] + j,
- s->blocks, imdct_scale);
- s->dsp->vector_fmul_window(dst, dst, dst + CELT_OVERLAP / 2,
+ imdct->imdct_half(imdct, dst + CELT_OVERLAP / 2, f->block[i].coeffs + j,
+ f->blocks, imdct_scale);
+ f->dsp->vector_fmul_window(dst, dst, dst + CELT_OVERLAP / 2,
ff_celt_window, CELT_OVERLAP / 2);
}
/* postfilter */
- celt_postfilter(s, frame);
+ celt_postfilter(f, block);
/* deemphasis and output scaling */
for (j = 0; j < frame_size; j++) {
- float tmp = frame->buf[1024 - frame_size + j] + m;
- m = tmp * CELT_DEEMPH_COEFF;
+ float tmp = block->buf[1024 - frame_size + j] + m;
+ m = tmp * CELT_EMPH_COEFF;
output[i][j] = tmp / 32768.;
}
- frame->deemph_coeff = m;
+ block->emph_coeff = m;
}
- if (coded_channels == 1)
- memcpy(s->frame[1].energy, s->frame[0].energy, sizeof(s->frame[0].energy));
+ if (channels == 1)
+ memcpy(f->block[1].energy, f->block[0].energy, sizeof(f->block[0].energy));
for (i = 0; i < 2; i++ ) {
- CeltFrame *frame = &s->frame[i];
+ CeltBlock *block = &f->block[i];
- if (!transient) {
- memcpy(frame->prev_energy[1], frame->prev_energy[0], sizeof(frame->prev_energy[0]));
- memcpy(frame->prev_energy[0], frame->energy, sizeof(frame->prev_energy[0]));
+ if (!f->transient) {
+ memcpy(block->prev_energy[1], block->prev_energy[0], sizeof(block->prev_energy[0]));
+ memcpy(block->prev_energy[0], block->energy, sizeof(block->prev_energy[0]));
} else {
for (j = 0; j < CELT_MAX_BANDS; j++)
- frame->prev_energy[0][j] = FFMIN(frame->prev_energy[0][j], frame->energy[j]);
+ block->prev_energy[0][j] = FFMIN(block->prev_energy[0][j], block->energy[j]);
}
- for (j = 0; j < s->startband; j++) {
- frame->prev_energy[0][j] = CELT_ENERGY_SILENCE;
- frame->energy[j] = 0.0;
+ for (j = 0; j < f->start_band; j++) {
+ block->prev_energy[0][j] = CELT_ENERGY_SILENCE;
+ block->energy[j] = 0.0;
}
- for (j = s->endband; j < CELT_MAX_BANDS; j++) {
- frame->prev_energy[0][j] = CELT_ENERGY_SILENCE;
- frame->energy[j] = 0.0;
+ for (j = f->end_band; j < CELT_MAX_BANDS; j++) {
+ block->prev_energy[0][j] = CELT_ENERGY_SILENCE;
+ block->energy[j] = 0.0;
}
}
- s->seed = rc->range;
+ f->seed = rc->range;
return 0;
}
-void ff_celt_flush(CeltContext *s)
+void ff_celt_flush(CeltFrame *f)
{
int i, j;
- if (s->flushed)
+ if (f->flushed)
return;
for (i = 0; i < 2; i++) {
- CeltFrame *frame = &s->frame[i];
+ CeltBlock *block = &f->block[i];
for (j = 0; j < CELT_MAX_BANDS; j++)
- frame->prev_energy[0][j] = frame->prev_energy[1][j] = CELT_ENERGY_SILENCE;
+ block->prev_energy[0][j] = block->prev_energy[1][j] = CELT_ENERGY_SILENCE;
- memset(frame->energy, 0, sizeof(frame->energy));
- memset(frame->buf, 0, sizeof(frame->buf));
+ memset(block->energy, 0, sizeof(block->energy));
+ memset(block->buf, 0, sizeof(block->buf));
- memset(frame->pf_gains, 0, sizeof(frame->pf_gains));
- memset(frame->pf_gains_old, 0, sizeof(frame->pf_gains_old));
- memset(frame->pf_gains_new, 0, sizeof(frame->pf_gains_new));
+ memset(block->pf_gains, 0, sizeof(block->pf_gains));
+ memset(block->pf_gains_old, 0, sizeof(block->pf_gains_old));
+ memset(block->pf_gains_new, 0, sizeof(block->pf_gains_new));
- frame->deemph_coeff = 0.0;
+ block->emph_coeff = 0.0;
}
- s->seed = 0;
+ f->seed = 0;
- s->flushed = 1;
+ f->flushed = 1;
}
-void ff_celt_free(CeltContext **ps)
+void ff_celt_free(CeltFrame **f)
{
- CeltContext *s = *ps;
+ CeltFrame *frm = *f;
int i;
- if (!s)
+ if (!frm)
return;
- for (i = 0; i < FF_ARRAY_ELEMS(s->imdct); i++)
- ff_imdct15_uninit(&s->imdct[i]);
+ for (i = 0; i < FF_ARRAY_ELEMS(frm->imdct); i++)
+ ff_mdct15_uninit(&frm->imdct[i]);
- av_freep(&s->dsp);
- av_freep(ps);
+ av_freep(&frm->dsp);
+ av_freep(f);
}
-int ff_celt_init(AVCodecContext *avctx, CeltContext **ps, int output_channels)
+int ff_celt_init(AVCodecContext *avctx, CeltFrame **f, int output_channels)
{
- CeltContext *s;
+ CeltFrame *frm;
int i, ret;
if (output_channels != 1 && output_channels != 2) {
return AVERROR(EINVAL);
}
- s = av_mallocz(sizeof(*s));
- if (!s)
+ frm = av_mallocz(sizeof(*frm));
+ if (!frm)
return AVERROR(ENOMEM);
- s->avctx = avctx;
- s->output_channels = output_channels;
+ frm->avctx = avctx;
+ frm->output_channels = output_channels;
- for (i = 0; i < FF_ARRAY_ELEMS(s->imdct); i++) {
- ret = ff_imdct15_init(&s->imdct[i], i + 3);
+ for (i = 0; i < FF_ARRAY_ELEMS(frm->imdct); i++) {
+ ret = ff_mdct15_init(&frm->imdct[i], 1, i + 3, -1.0f);
if (ret < 0)
goto fail;
}
- s->dsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
- if (!s->dsp) {
+ frm->dsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
+ if (!frm->dsp) {
ret = AVERROR(ENOMEM);
goto fail;
}
- ff_celt_flush(s);
+ ff_celt_flush(frm);
- *ps = s;
+ *f = frm;
return 0;
fail:
- ff_celt_free(&s);
+ ff_celt_free(&frm);
return ret;
}
projects / ffmpeg / blobdiff