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ffmpeg/libavcodec/aacps.c
Vittorio Giovara 16c7a8a142 aacps: invert the order of parameters of ipdopd_reset() 
This is the order that the caller uses in the rest of the file. The
same operation is applied to both parameters, so this change is only
done for consistency, it doesn't change the actual behaviour.

Bug-Id: CID 732285 / CID 732286
2014-12-18 23:27:14 +01:00

957 lines
34 KiB
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/*
* MPEG-4 Parametric Stereo decoding functions
* Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include "libavutil/common.h"
#include "libavutil/internal.h"
#include "libavutil/mathematics.h"
#include "avcodec.h"
#include "get_bits.h"
#include "aacps.h"
#include "aacps_tablegen.h"
#include "aacpsdata.c"
#define PS_BASELINE 0 ///< Operate in Baseline PS mode
///< Baseline implies 10 or 20 stereo bands,
///< mixing mode A, and no ipd/opd
#define numQMFSlots 32 //numTimeSlots * RATE
static const int8_t num_env_tab[2][4] = {
{ 0, 1, 2, 4, },
{ 1, 2, 3, 4, },
};
static const int8_t nr_iidicc_par_tab[] = {
10, 20, 34, 10, 20, 34,
};
static const int8_t nr_iidopd_par_tab[] = {
5, 11, 17, 5, 11, 17,
};
enum {
huff_iid_df1,
huff_iid_dt1,
huff_iid_df0,
huff_iid_dt0,
huff_icc_df,
huff_icc_dt,
huff_ipd_df,
huff_ipd_dt,
huff_opd_df,
huff_opd_dt,
};
static const int huff_iid[] = {
huff_iid_df0,
huff_iid_df1,
huff_iid_dt0,
huff_iid_dt1,
};
static VLC vlc_ps[10];
#define READ_PAR_DATA(PAR, OFFSET, MASK, ERR_CONDITION) \
/** \
* Read Inter-channel Intensity Difference/Inter-Channel Coherence/ \
* Inter-channel Phase Difference/Overall Phase Difference parameters from the \
* bitstream. \
* \
* @param avctx contains the current codec context \
* @param gb pointer to the input bitstream \
* @param ps pointer to the Parametric Stereo context \
* @param PAR pointer to the parameter to be read \
* @param e envelope to decode \
* @param dt 1: time delta-coded, 0: frequency delta-coded \
*/ \
static int read_ ## PAR ## _data(AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, \
int8_t (*PAR)[PS_MAX_NR_IIDICC], int table_idx, int e, int dt) \
{ \
int b, num = ps->nr_ ## PAR ## _par; \
VLC_TYPE (*vlc_table)[2] = vlc_ps[table_idx].table; \
if (dt) { \
int e_prev = e ? e - 1 : ps->num_env_old - 1; \
e_prev = FFMAX(e_prev, 0); \
for (b = 0; b < num; b++) { \
int val = PAR[e_prev][b] + get_vlc2(gb, vlc_table, 9, 3) - OFFSET; \
if (MASK) val &= MASK; \
PAR[e][b] = val; \
if (ERR_CONDITION) \
goto err; \
} \
} else { \
int val = 0; \
for (b = 0; b < num; b++) { \
val += get_vlc2(gb, vlc_table, 9, 3) - OFFSET; \
if (MASK) val &= MASK; \
PAR[e][b] = val; \
if (ERR_CONDITION) \
goto err; \
} \
} \
return 0; \
err: \
av_log(avctx, AV_LOG_ERROR, "illegal "#PAR"\n"); \
return -1; \
}
READ_PAR_DATA(iid, huff_offset[table_idx], 0, FFABS(ps->iid_par[e][b]) > 7 + 8 * ps->iid_quant)
READ_PAR_DATA(icc, huff_offset[table_idx], 0, ps->icc_par[e][b] > 7U)
READ_PAR_DATA(ipdopd, 0, 0x07, 0)
static int ps_read_extension_data(GetBitContext *gb, PSContext *ps, int ps_extension_id)
{
int e;
int count = get_bits_count(gb);
if (ps_extension_id)
return 0;
ps->enable_ipdopd = get_bits1(gb);
if (ps->enable_ipdopd) {
for (e = 0; e < ps->num_env; e++) {
int dt = get_bits1(gb);
read_ipdopd_data(NULL, gb, ps, ps->ipd_par, dt ? huff_ipd_dt : huff_ipd_df, e, dt);
dt = get_bits1(gb);
read_ipdopd_data(NULL, gb, ps, ps->opd_par, dt ? huff_opd_dt : huff_opd_df, e, dt);
}
}
skip_bits1(gb); //reserved_ps
return get_bits_count(gb) - count;
}
static void ipdopd_reset(int8_t *ipd_hist, int8_t *opd_hist)
{
int i;
for (i = 0; i < PS_MAX_NR_IPDOPD; i++) {
opd_hist[i] = 0;
ipd_hist[i] = 0;
}
}
int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb_host, PSContext *ps, int bits_left)
{
int e;
int bit_count_start = get_bits_count(gb_host);
int header;
int bits_consumed;
GetBitContext gbc = *gb_host, *gb = &gbc;
header = get_bits1(gb);
if (header) { //enable_ps_header
ps->enable_iid = get_bits1(gb);
if (ps->enable_iid) {
int iid_mode = get_bits(gb, 3);
if (iid_mode > 5) {
av_log(avctx, AV_LOG_ERROR, "iid_mode %d is reserved.\n",
iid_mode);
goto err;
}
ps->nr_iid_par = nr_iidicc_par_tab[iid_mode];
ps->iid_quant = iid_mode > 2;
ps->nr_ipdopd_par = nr_iidopd_par_tab[iid_mode];
}
ps->enable_icc = get_bits1(gb);
if (ps->enable_icc) {
ps->icc_mode = get_bits(gb, 3);
if (ps->icc_mode > 5) {
av_log(avctx, AV_LOG_ERROR, "icc_mode %d is reserved.\n",
ps->icc_mode);
goto err;
}
ps->nr_icc_par = nr_iidicc_par_tab[ps->icc_mode];
}
ps->enable_ext = get_bits1(gb);
}
ps->frame_class = get_bits1(gb);
ps->num_env_old = ps->num_env;
ps->num_env = num_env_tab[ps->frame_class][get_bits(gb, 2)];
ps->border_position[0] = -1;
if (ps->frame_class) {
for (e = 1; e <= ps->num_env; e++)
ps->border_position[e] = get_bits(gb, 5);
} else
for (e = 1; e <= ps->num_env; e++)
ps->border_position[e] = (e * numQMFSlots >> ff_log2_tab[ps->num_env]) - 1;
if (ps->enable_iid) {
for (e = 0; e < ps->num_env; e++) {
int dt = get_bits1(gb);
if (read_iid_data(avctx, gb, ps, ps->iid_par, huff_iid[2*dt+ps->iid_quant], e, dt))
goto err;
}
} else
memset(ps->iid_par, 0, sizeof(ps->iid_par));
if (ps->enable_icc)
for (e = 0; e < ps->num_env; e++) {
int dt = get_bits1(gb);
if (read_icc_data(avctx, gb, ps, ps->icc_par, dt ? huff_icc_dt : huff_icc_df, e, dt))
goto err;
}
else
memset(ps->icc_par, 0, sizeof(ps->icc_par));
if (ps->enable_ext) {
int cnt = get_bits(gb, 4);
if (cnt == 15) {
cnt += get_bits(gb, 8);
}
cnt *= 8;
while (cnt > 7) {
int ps_extension_id = get_bits(gb, 2);
cnt -= 2 + ps_read_extension_data(gb, ps, ps_extension_id);
}
if (cnt < 0) {
av_log(avctx, AV_LOG_ERROR, "ps extension overflow %d\n", cnt);
goto err;
}
skip_bits(gb, cnt);
}
ps->enable_ipdopd &= !PS_BASELINE;
//Fix up envelopes
if (!ps->num_env || ps->border_position[ps->num_env] < numQMFSlots - 1) {
//Create a fake envelope
int source = ps->num_env ? ps->num_env - 1 : ps->num_env_old - 1;
if (source >= 0 && source != ps->num_env) {
if (ps->enable_iid) {
memcpy(ps->iid_par+ps->num_env, ps->iid_par+source, sizeof(ps->iid_par[0]));
}
if (ps->enable_icc) {
memcpy(ps->icc_par+ps->num_env, ps->icc_par+source, sizeof(ps->icc_par[0]));
}
if (ps->enable_ipdopd) {
memcpy(ps->ipd_par+ps->num_env, ps->ipd_par+source, sizeof(ps->ipd_par[0]));
memcpy(ps->opd_par+ps->num_env, ps->opd_par+source, sizeof(ps->opd_par[0]));
}
}
ps->num_env++;
ps->border_position[ps->num_env] = numQMFSlots - 1;
}
ps->is34bands_old = ps->is34bands;
if (!PS_BASELINE && (ps->enable_iid || ps->enable_icc))
ps->is34bands = (ps->enable_iid && ps->nr_iid_par == 34) ||
(ps->enable_icc && ps->nr_icc_par == 34);
//Baseline
if (!ps->enable_ipdopd) {
memset(ps->ipd_par, 0, sizeof(ps->ipd_par));
memset(ps->opd_par, 0, sizeof(ps->opd_par));
}
if (header)
ps->start = 1;
bits_consumed = get_bits_count(gb) - bit_count_start;
if (bits_consumed <= bits_left) {
skip_bits_long(gb_host, bits_consumed);
return bits_consumed;
}
av_log(avctx, AV_LOG_ERROR, "Expected to read %d PS bits actually read %d.\n", bits_left, bits_consumed);
err:
ps->start = 0;
skip_bits_long(gb_host, bits_left);
memset(ps->iid_par, 0, sizeof(ps->iid_par));
memset(ps->icc_par, 0, sizeof(ps->icc_par));
memset(ps->ipd_par, 0, sizeof(ps->ipd_par));
memset(ps->opd_par, 0, sizeof(ps->opd_par));
return bits_left;
}
/** Split one subband into 2 subsubbands with a symmetric real filter.
* The filter must have its non-center even coefficients equal to zero. */
static void hybrid2_re(float (*in)[2], float (*out)[32][2], const float filter[8], int len, int reverse)
{
int i, j;
for (i = 0; i < len; i++, in++) {
float re_in = filter[6] * in[6][0]; //real inphase
float re_op = 0.0f; //real out of phase
float im_in = filter[6] * in[6][1]; //imag inphase
float im_op = 0.0f; //imag out of phase
for (j = 0; j < 6; j += 2) {
re_op += filter[j+1] * (in[j+1][0] + in[12-j-1][0]);
im_op += filter[j+1] * (in[j+1][1] + in[12-j-1][1]);
}
out[ reverse][i][0] = re_in + re_op;
out[ reverse][i][1] = im_in + im_op;
out[!reverse][i][0] = re_in - re_op;
out[!reverse][i][1] = im_in - im_op;
}
}
/** Split one subband into 6 subsubbands with a complex filter */
static void hybrid6_cx(PSDSPContext *dsp, float (*in)[2], float (*out)[32][2],
TABLE_CONST float (*filter)[8][2], int len)
{
int i;
int N = 8;
LOCAL_ALIGNED_16(float, temp, [8], [2]);
for (i = 0; i < len; i++, in++) {
dsp->hybrid_analysis(temp, in, (const float (*)[8][2]) filter, 1, N);
out[0][i][0] = temp[6][0];
out[0][i][1] = temp[6][1];
out[1][i][0] = temp[7][0];
out[1][i][1] = temp[7][1];
out[2][i][0] = temp[0][0];
out[2][i][1] = temp[0][1];
out[3][i][0] = temp[1][0];
out[3][i][1] = temp[1][1];
out[4][i][0] = temp[2][0] + temp[5][0];
out[4][i][1] = temp[2][1] + temp[5][1];
out[5][i][0] = temp[3][0] + temp[4][0];
out[5][i][1] = temp[3][1] + temp[4][1];
}
}
static void hybrid4_8_12_cx(PSDSPContext *dsp,
float (*in)[2], float (*out)[32][2],
TABLE_CONST float (*filter)[8][2], int N, int len)
{
int i;
for (i = 0; i < len; i++, in++) {
dsp->hybrid_analysis(out[0] + i, in, (const float (*)[8][2]) filter, 32, N);
}
}
static void hybrid_analysis(PSDSPContext *dsp, float out[91][32][2],
float in[5][44][2], float L[2][38][64],
int is34, int len)
{
int i, j;
for (i = 0; i < 5; i++) {
for (j = 0; j < 38; j++) {
in[i][j+6][0] = L[0][j][i];
in[i][j+6][1] = L[1][j][i];
}
}
if (is34) {
hybrid4_8_12_cx(dsp, in[0], out, f34_0_12, 12, len);
hybrid4_8_12_cx(dsp, in[1], out+12, f34_1_8, 8, len);
hybrid4_8_12_cx(dsp, in[2], out+20, f34_2_4, 4, len);
hybrid4_8_12_cx(dsp, in[3], out+24, f34_2_4, 4, len);
hybrid4_8_12_cx(dsp, in[4], out+28, f34_2_4, 4, len);
dsp->hybrid_analysis_ileave(out + 27, L, 5, len);
} else {
hybrid6_cx(dsp, in[0], out, f20_0_8, len);
hybrid2_re(in[1], out+6, g1_Q2, len, 1);
hybrid2_re(in[2], out+8, g1_Q2, len, 0);
dsp->hybrid_analysis_ileave(out + 7, L, 3, len);
}
//update in_buf
for (i = 0; i < 5; i++) {
memcpy(in[i], in[i]+32, 6 * sizeof(in[i][0]));
}
}
static void hybrid_synthesis(PSDSPContext *dsp, float out[2][38][64],
float in[91][32][2], int is34, int len)
{
int i, n;
if (is34) {
for (n = 0; n < len; n++) {
memset(out[0][n], 0, 5*sizeof(out[0][n][0]));
memset(out[1][n], 0, 5*sizeof(out[1][n][0]));
for (i = 0; i < 12; i++) {
out[0][n][0] += in[ i][n][0];
out[1][n][0] += in[ i][n][1];
}
for (i = 0; i < 8; i++) {
out[0][n][1] += in[12+i][n][0];
out[1][n][1] += in[12+i][n][1];
}
for (i = 0; i < 4; i++) {
out[0][n][2] += in[20+i][n][0];
out[1][n][2] += in[20+i][n][1];
out[0][n][3] += in[24+i][n][0];
out[1][n][3] += in[24+i][n][1];
out[0][n][4] += in[28+i][n][0];
out[1][n][4] += in[28+i][n][1];
}
}
dsp->hybrid_synthesis_deint(out, in + 27, 5, len);
} else {
for (n = 0; n < len; n++) {
out[0][n][0] = in[0][n][0] + in[1][n][0] + in[2][n][0] +
in[3][n][0] + in[4][n][0] + in[5][n][0];
out[1][n][0] = in[0][n][1] + in[1][n][1] + in[2][n][1] +
in[3][n][1] + in[4][n][1] + in[5][n][1];
out[0][n][1] = in[6][n][0] + in[7][n][0];
out[1][n][1] = in[6][n][1] + in[7][n][1];
out[0][n][2] = in[8][n][0] + in[9][n][0];
out[1][n][2] = in[8][n][1] + in[9][n][1];
}
dsp->hybrid_synthesis_deint(out, in + 7, 3, len);
}
}
/// All-pass filter decay slope
#define DECAY_SLOPE 0.05f
/// Number of frequency bands that can be addressed by the parameter index, b(k)
static const int NR_PAR_BANDS[] = { 20, 34 };
/// Number of frequency bands that can be addressed by the sub subband index, k
static const int NR_BANDS[] = { 71, 91 };
/// Start frequency band for the all-pass filter decay slope
static const int DECAY_CUTOFF[] = { 10, 32 };
/// Number of all-pass filer bands
static const int NR_ALLPASS_BANDS[] = { 30, 50 };
/// First stereo band using the short one sample delay
static const int SHORT_DELAY_BAND[] = { 42, 62 };
/** Table 8.46 */
static void map_idx_10_to_20(int8_t *par_mapped, const int8_t *par, int full)
{
int b;
if (full)
b = 9;
else {
b = 4;
par_mapped[10] = 0;
}
for (; b >= 0; b--) {
par_mapped[2*b+1] = par_mapped[2*b] = par[b];
}
}
static void map_idx_34_to_20(int8_t *par_mapped, const int8_t *par, int full)
{
par_mapped[ 0] = (2*par[ 0] + par[ 1]) / 3;
par_mapped[ 1] = ( par[ 1] + 2*par[ 2]) / 3;
par_mapped[ 2] = (2*par[ 3] + par[ 4]) / 3;
par_mapped[ 3] = ( par[ 4] + 2*par[ 5]) / 3;
par_mapped[ 4] = ( par[ 6] + par[ 7]) / 2;
par_mapped[ 5] = ( par[ 8] + par[ 9]) / 2;
par_mapped[ 6] = par[10];
par_mapped[ 7] = par[11];
par_mapped[ 8] = ( par[12] + par[13]) / 2;
par_mapped[ 9] = ( par[14] + par[15]) / 2;
par_mapped[10] = par[16];
if (full) {
par_mapped[11] = par[17];
par_mapped[12] = par[18];
par_mapped[13] = par[19];
par_mapped[14] = ( par[20] + par[21]) / 2;
par_mapped[15] = ( par[22] + par[23]) / 2;
par_mapped[16] = ( par[24] + par[25]) / 2;
par_mapped[17] = ( par[26] + par[27]) / 2;
par_mapped[18] = ( par[28] + par[29] + par[30] + par[31]) / 4;
par_mapped[19] = ( par[32] + par[33]) / 2;
}
}
static void map_val_34_to_20(float par[PS_MAX_NR_IIDICC])
{
par[ 0] = (2*par[ 0] + par[ 1]) * 0.33333333f;
par[ 1] = ( par[ 1] + 2*par[ 2]) * 0.33333333f;
par[ 2] = (2*par[ 3] + par[ 4]) * 0.33333333f;
par[ 3] = ( par[ 4] + 2*par[ 5]) * 0.33333333f;
par[ 4] = ( par[ 6] + par[ 7]) * 0.5f;
par[ 5] = ( par[ 8] + par[ 9]) * 0.5f;
par[ 6] = par[10];
par[ 7] = par[11];
par[ 8] = ( par[12] + par[13]) * 0.5f;
par[ 9] = ( par[14] + par[15]) * 0.5f;
par[10] = par[16];
par[11] = par[17];
par[12] = par[18];
par[13] = par[19];
par[14] = ( par[20] + par[21]) * 0.5f;
par[15] = ( par[22] + par[23]) * 0.5f;
par[16] = ( par[24] + par[25]) * 0.5f;
par[17] = ( par[26] + par[27]) * 0.5f;
par[18] = ( par[28] + par[29] + par[30] + par[31]) * 0.25f;
par[19] = ( par[32] + par[33]) * 0.5f;
}
static void map_idx_10_to_34(int8_t *par_mapped, const int8_t *par, int full)
{
if (full) {
par_mapped[33] = par[9];
par_mapped[32] = par[9];
par_mapped[31] = par[9];
par_mapped[30] = par[9];
par_mapped[29] = par[9];
par_mapped[28] = par[9];
par_mapped[27] = par[8];
par_mapped[26] = par[8];
par_mapped[25] = par[8];
par_mapped[24] = par[8];
par_mapped[23] = par[7];
par_mapped[22] = par[7];
par_mapped[21] = par[7];
par_mapped[20] = par[7];
par_mapped[19] = par[6];
par_mapped[18] = par[6];
par_mapped[17] = par[5];
par_mapped[16] = par[5];
} else {
par_mapped[16] = 0;
}
par_mapped[15] = par[4];
par_mapped[14] = par[4];
par_mapped[13] = par[4];
par_mapped[12] = par[4];
par_mapped[11] = par[3];
par_mapped[10] = par[3];
par_mapped[ 9] = par[2];
par_mapped[ 8] = par[2];
par_mapped[ 7] = par[2];
par_mapped[ 6] = par[2];
par_mapped[ 5] = par[1];
par_mapped[ 4] = par[1];
par_mapped[ 3] = par[1];
par_mapped[ 2] = par[0];
par_mapped[ 1] = par[0];
par_mapped[ 0] = par[0];
}
static void map_idx_20_to_34(int8_t *par_mapped, const int8_t *par, int full)
{
if (full) {
par_mapped[33] = par[19];
par_mapped[32] = par[19];
par_mapped[31] = par[18];
par_mapped[30] = par[18];
par_mapped[29] = par[18];
par_mapped[28] = par[18];
par_mapped[27] = par[17];
par_mapped[26] = par[17];
par_mapped[25] = par[16];
par_mapped[24] = par[16];
par_mapped[23] = par[15];
par_mapped[22] = par[15];
par_mapped[21] = par[14];
par_mapped[20] = par[14];
par_mapped[19] = par[13];
par_mapped[18] = par[12];
par_mapped[17] = par[11];
}
par_mapped[16] = par[10];
par_mapped[15] = par[ 9];
par_mapped[14] = par[ 9];
par_mapped[13] = par[ 8];
par_mapped[12] = par[ 8];
par_mapped[11] = par[ 7];
par_mapped[10] = par[ 6];
par_mapped[ 9] = par[ 5];
par_mapped[ 8] = par[ 5];
par_mapped[ 7] = par[ 4];
par_mapped[ 6] = par[ 4];
par_mapped[ 5] = par[ 3];
par_mapped[ 4] = (par[ 2] + par[ 3]) / 2;
par_mapped[ 3] = par[ 2];
par_mapped[ 2] = par[ 1];
par_mapped[ 1] = (par[ 0] + par[ 1]) / 2;
par_mapped[ 0] = par[ 0];
}
static void map_val_20_to_34(float par[PS_MAX_NR_IIDICC])
{
par[33] = par[19];
par[32] = par[19];
par[31] = par[18];
par[30] = par[18];
par[29] = par[18];
par[28] = par[18];
par[27] = par[17];
par[26] = par[17];
par[25] = par[16];
par[24] = par[16];
par[23] = par[15];
par[22] = par[15];
par[21] = par[14];
par[20] = par[14];
par[19] = par[13];
par[18] = par[12];
par[17] = par[11];
par[16] = par[10];
par[15] = par[ 9];
par[14] = par[ 9];
par[13] = par[ 8];
par[12] = par[ 8];
par[11] = par[ 7];
par[10] = par[ 6];
par[ 9] = par[ 5];
par[ 8] = par[ 5];
par[ 7] = par[ 4];
par[ 6] = par[ 4];
par[ 5] = par[ 3];
par[ 4] = (par[ 2] + par[ 3]) * 0.5f;
par[ 3] = par[ 2];
par[ 2] = par[ 1];
par[ 1] = (par[ 0] + par[ 1]) * 0.5f;
par[ 0] = par[ 0];
}
static void decorrelation(PSContext *ps, float (*out)[32][2], const float (*s)[32][2], int is34)
{
LOCAL_ALIGNED_16(float, power, [34], [PS_QMF_TIME_SLOTS]);
LOCAL_ALIGNED_16(float, transient_gain, [34], [PS_QMF_TIME_SLOTS]);
float *peak_decay_nrg = ps->peak_decay_nrg;
float *power_smooth = ps->power_smooth;
float *peak_decay_diff_smooth = ps->peak_decay_diff_smooth;
float (*delay)[PS_QMF_TIME_SLOTS + PS_MAX_DELAY][2] = ps->delay;
float (*ap_delay)[PS_AP_LINKS][PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2] = ps->ap_delay;
const int8_t *k_to_i = is34 ? k_to_i_34 : k_to_i_20;
const float peak_decay_factor = 0.76592833836465f;
const float transient_impact = 1.5f;
const float a_smooth = 0.25f; ///< Smoothing coefficient
int i, k, m, n;
int n0 = 0, nL = 32;
memset(power, 0, 34 * sizeof(*power));
if (is34 != ps->is34bands_old) {
memset(ps->peak_decay_nrg, 0, sizeof(ps->peak_decay_nrg));
memset(ps->power_smooth, 0, sizeof(ps->power_smooth));
memset(ps->peak_decay_diff_smooth, 0, sizeof(ps->peak_decay_diff_smooth));
memset(ps->delay, 0, sizeof(ps->delay));
memset(ps->ap_delay, 0, sizeof(ps->ap_delay));
}
for (k = 0; k < NR_BANDS[is34]; k++) {
int i = k_to_i[k];
ps->dsp.add_squares(power[i], s[k], nL - n0);
}
//Transient detection
for (i = 0; i < NR_PAR_BANDS[is34]; i++) {
for (n = n0; n < nL; n++) {
float decayed_peak = peak_decay_factor * peak_decay_nrg[i];
float denom;
peak_decay_nrg[i] = FFMAX(decayed_peak, power[i][n]);
power_smooth[i] += a_smooth * (power[i][n] - power_smooth[i]);
peak_decay_diff_smooth[i] += a_smooth * (peak_decay_nrg[i] - power[i][n] - peak_decay_diff_smooth[i]);
denom = transient_impact * peak_decay_diff_smooth[i];
transient_gain[i][n] = (denom > power_smooth[i]) ?
power_smooth[i] / denom : 1.0f;
}
}
//Decorrelation and transient reduction
// PS_AP_LINKS - 1
// -----
// | | Q_fract_allpass[k][m]*z^-link_delay[m] - a[m]*g_decay_slope[k]
//H[k][z] = z^-2 * phi_fract[k] * | | ----------------------------------------------------------------
// | | 1 - a[m]*g_decay_slope[k]*Q_fract_allpass[k][m]*z^-link_delay[m]
// m = 0
//d[k][z] (out) = transient_gain_mapped[k][z] * H[k][z] * s[k][z]
for (k = 0; k < NR_ALLPASS_BANDS[is34]; k++) {
int b = k_to_i[k];
float g_decay_slope = 1.f - DECAY_SLOPE * (k - DECAY_CUTOFF[is34]);
g_decay_slope = av_clipf(g_decay_slope, 0.f, 1.f);
memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));
memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));
for (m = 0; m < PS_AP_LINKS; m++) {
memcpy(ap_delay[k][m], ap_delay[k][m]+numQMFSlots, 5*sizeof(ap_delay[k][m][0]));
}
ps->dsp.decorrelate(out[k], delay[k] + PS_MAX_DELAY - 2, ap_delay[k],
phi_fract[is34][k],
(const float (*)[2]) Q_fract_allpass[is34][k],
transient_gain[b], g_decay_slope, nL - n0);
}
for (; k < SHORT_DELAY_BAND[is34]; k++) {
int i = k_to_i[k];
memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));
memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));
//H = delay 14
ps->dsp.mul_pair_single(out[k], delay[k] + PS_MAX_DELAY - 14,
transient_gain[i], nL - n0);
}
for (; k < NR_BANDS[is34]; k++) {
int i = k_to_i[k];
memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));
memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));
//H = delay 1
ps->dsp.mul_pair_single(out[k], delay[k] + PS_MAX_DELAY - 1,
transient_gain[i], nL - n0);
}
}
static void remap34(int8_t (**p_par_mapped)[PS_MAX_NR_IIDICC],
int8_t (*par)[PS_MAX_NR_IIDICC],
int num_par, int num_env, int full)
{
int8_t (*par_mapped)[PS_MAX_NR_IIDICC] = *p_par_mapped;
int e;
if (num_par == 20 || num_par == 11) {
for (e = 0; e < num_env; e++) {
map_idx_20_to_34(par_mapped[e], par[e], full);
}
} else if (num_par == 10 || num_par == 5) {
for (e = 0; e < num_env; e++) {
map_idx_10_to_34(par_mapped[e], par[e], full);
}
} else {
*p_par_mapped = par;
}
}
static void remap20(int8_t (**p_par_mapped)[PS_MAX_NR_IIDICC],
int8_t (*par)[PS_MAX_NR_IIDICC],
int num_par, int num_env, int full)
{
int8_t (*par_mapped)[PS_MAX_NR_IIDICC] = *p_par_mapped;
int e;
if (num_par == 34 || num_par == 17) {
for (e = 0; e < num_env; e++) {
map_idx_34_to_20(par_mapped[e], par[e], full);
}
} else if (num_par == 10 || num_par == 5) {
for (e = 0; e < num_env; e++) {
map_idx_10_to_20(par_mapped[e], par[e], full);
}
} else {
*p_par_mapped = par;
}
}
static void stereo_processing(PSContext *ps, float (*l)[32][2], float (*r)[32][2], int is34)
{
int e, b, k;
float (*H11)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H11;
float (*H12)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H12;
float (*H21)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H21;
float (*H22)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H22;
int8_t *opd_hist = ps->opd_hist;
int8_t *ipd_hist = ps->ipd_hist;
int8_t iid_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
int8_t icc_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
int8_t ipd_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
int8_t opd_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
int8_t (*iid_mapped)[PS_MAX_NR_IIDICC] = iid_mapped_buf;
int8_t (*icc_mapped)[PS_MAX_NR_IIDICC] = icc_mapped_buf;
int8_t (*ipd_mapped)[PS_MAX_NR_IIDICC] = ipd_mapped_buf;
int8_t (*opd_mapped)[PS_MAX_NR_IIDICC] = opd_mapped_buf;
const int8_t *k_to_i = is34 ? k_to_i_34 : k_to_i_20;
TABLE_CONST float (*H_LUT)[8][4] = (PS_BASELINE || ps->icc_mode < 3) ? HA : HB;
//Remapping
if (ps->num_env_old) {
memcpy(H11[0][0], H11[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H11[0][0][0]));
memcpy(H11[1][0], H11[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H11[1][0][0]));
memcpy(H12[0][0], H12[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H12[0][0][0]));
memcpy(H12[1][0], H12[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H12[1][0][0]));
memcpy(H21[0][0], H21[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H21[0][0][0]));
memcpy(H21[1][0], H21[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H21[1][0][0]));
memcpy(H22[0][0], H22[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H22[0][0][0]));
memcpy(H22[1][0], H22[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H22[1][0][0]));
}
if (is34) {
remap34(&iid_mapped, ps->iid_par, ps->nr_iid_par, ps->num_env, 1);
remap34(&icc_mapped, ps->icc_par, ps->nr_icc_par, ps->num_env, 1);
if (ps->enable_ipdopd) {
remap34(&ipd_mapped, ps->ipd_par, ps->nr_ipdopd_par, ps->num_env, 0);
remap34(&opd_mapped, ps->opd_par, ps->nr_ipdopd_par, ps->num_env, 0);
}
if (!ps->is34bands_old) {
map_val_20_to_34(H11[0][0]);
map_val_20_to_34(H11[1][0]);
map_val_20_to_34(H12[0][0]);
map_val_20_to_34(H12[1][0]);
map_val_20_to_34(H21[0][0]);
map_val_20_to_34(H21[1][0]);
map_val_20_to_34(H22[0][0]);
map_val_20_to_34(H22[1][0]);
ipdopd_reset(ipd_hist, opd_hist);
}
} else {
remap20(&iid_mapped, ps->iid_par, ps->nr_iid_par, ps->num_env, 1);
remap20(&icc_mapped, ps->icc_par, ps->nr_icc_par, ps->num_env, 1);
if (ps->enable_ipdopd) {
remap20(&ipd_mapped, ps->ipd_par, ps->nr_ipdopd_par, ps->num_env, 0);
remap20(&opd_mapped, ps->opd_par, ps->nr_ipdopd_par, ps->num_env, 0);
}
if (ps->is34bands_old) {
map_val_34_to_20(H11[0][0]);
map_val_34_to_20(H11[1][0]);
map_val_34_to_20(H12[0][0]);
map_val_34_to_20(H12[1][0]);
map_val_34_to_20(H21[0][0]);
map_val_34_to_20(H21[1][0]);
map_val_34_to_20(H22[0][0]);
map_val_34_to_20(H22[1][0]);
ipdopd_reset(ipd_hist, opd_hist);
}
}
//Mixing
for (e = 0; e < ps->num_env; e++) {
for (b = 0; b < NR_PAR_BANDS[is34]; b++) {
float h11, h12, h21, h22;
h11 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][0];
h12 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][1];
h21 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][2];
h22 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][3];
if (!PS_BASELINE && ps->enable_ipdopd && b < ps->nr_ipdopd_par) {
//The spec say says to only run this smoother when enable_ipdopd
//is set but the reference decoder appears to run it constantly
float h11i, h12i, h21i, h22i;
float ipd_adj_re, ipd_adj_im;
int opd_idx = opd_hist[b] * 8 + opd_mapped[e][b];
int ipd_idx = ipd_hist[b] * 8 + ipd_mapped[e][b];
float opd_re = pd_re_smooth[opd_idx];
float opd_im = pd_im_smooth[opd_idx];
float ipd_re = pd_re_smooth[ipd_idx];
float ipd_im = pd_im_smooth[ipd_idx];
opd_hist[b] = opd_idx & 0x3F;
ipd_hist[b] = ipd_idx & 0x3F;
ipd_adj_re = opd_re*ipd_re + opd_im*ipd_im;
ipd_adj_im = opd_im*ipd_re - opd_re*ipd_im;
h11i = h11 * opd_im;
h11 = h11 * opd_re;
h12i = h12 * ipd_adj_im;
h12 = h12 * ipd_adj_re;
h21i = h21 * opd_im;
h21 = h21 * opd_re;
h22i = h22 * ipd_adj_im;
h22 = h22 * ipd_adj_re;
H11[1][e+1][b] = h11i;
H12[1][e+1][b] = h12i;
H21[1][e+1][b] = h21i;
H22[1][e+1][b] = h22i;
}
H11[0][e+1][b] = h11;
H12[0][e+1][b] = h12;
H21[0][e+1][b] = h21;
H22[0][e+1][b] = h22;
}
for (k = 0; k < NR_BANDS[is34]; k++) {
float h[2][4];
float h_step[2][4];
int start = ps->border_position[e];
int stop = ps->border_position[e+1];
float width = 1.f / (stop - start);
b = k_to_i[k];
h[0][0] = H11[0][e][b];
h[0][1] = H12[0][e][b];
h[0][2] = H21[0][e][b];
h[0][3] = H22[0][e][b];
if (!PS_BASELINE && ps->enable_ipdopd) {
//Is this necessary? ps_04_new seems unchanged
if ((is34 && k <= 13 && k >= 9) || (!is34 && k <= 1)) {
h[1][0] = -H11[1][e][b];
h[1][1] = -H12[1][e][b];
h[1][2] = -H21[1][e][b];
h[1][3] = -H22[1][e][b];
} else {
h[1][0] = H11[1][e][b];
h[1][1] = H12[1][e][b];
h[1][2] = H21[1][e][b];
h[1][3] = H22[1][e][b];
}
}
//Interpolation
h_step[0][0] = (H11[0][e+1][b] - h[0][0]) * width;
h_step[0][1] = (H12[0][e+1][b] - h[0][1]) * width;
h_step[0][2] = (H21[0][e+1][b] - h[0][2]) * width;
h_step[0][3] = (H22[0][e+1][b] - h[0][3]) * width;
if (!PS_BASELINE && ps->enable_ipdopd) {
h_step[1][0] = (H11[1][e+1][b] - h[1][0]) * width;
h_step[1][1] = (H12[1][e+1][b] - h[1][1]) * width;
h_step[1][2] = (H21[1][e+1][b] - h[1][2]) * width;
h_step[1][3] = (H22[1][e+1][b] - h[1][3]) * width;
}
ps->dsp.stereo_interpolate[!PS_BASELINE && ps->enable_ipdopd](
l[k] + start + 1, r[k] + start + 1,
h, h_step, stop - start);
}
}
}
int ff_ps_apply(AVCodecContext *avctx, PSContext *ps, float L[2][38][64], float R[2][38][64], int top)
{
LOCAL_ALIGNED_16(float, Lbuf, [91], [32][2]);
LOCAL_ALIGNED_16(float, Rbuf, [91], [32][2]);
const int len = 32;
int is34 = ps->is34bands;
top += NR_BANDS[is34] - 64;
memset(ps->delay+top, 0, (NR_BANDS[is34] - top)*sizeof(ps->delay[0]));
if (top < NR_ALLPASS_BANDS[is34])
memset(ps->ap_delay + top, 0, (NR_ALLPASS_BANDS[is34] - top)*sizeof(ps->ap_delay[0]));
hybrid_analysis(&ps->dsp, Lbuf, ps->in_buf, L, is34, len);
decorrelation(ps, Rbuf, (const float (*)[32][2]) Lbuf, is34);
stereo_processing(ps, Lbuf, Rbuf, is34);
hybrid_synthesis(&ps->dsp, L, Lbuf, is34, len);
hybrid_synthesis(&ps->dsp, R, Rbuf, is34, len);
return 0;
}
#define PS_INIT_VLC_STATIC(num, size) \
INIT_VLC_STATIC(&vlc_ps[num], 9, ps_tmp[num].table_size / ps_tmp[num].elem_size, \
ps_tmp[num].ps_bits, 1, 1, \
ps_tmp[num].ps_codes, ps_tmp[num].elem_size, ps_tmp[num].elem_size, \
size);
#define PS_VLC_ROW(name) \
{ name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) }
av_cold void ff_ps_init(void) {
// Syntax initialization
static const struct {
const void *ps_codes, *ps_bits;
const unsigned int table_size, elem_size;
} ps_tmp[] = {
PS_VLC_ROW(huff_iid_df1),
PS_VLC_ROW(huff_iid_dt1),
PS_VLC_ROW(huff_iid_df0),
PS_VLC_ROW(huff_iid_dt0),
PS_VLC_ROW(huff_icc_df),
PS_VLC_ROW(huff_icc_dt),
PS_VLC_ROW(huff_ipd_df),
PS_VLC_ROW(huff_ipd_dt),
PS_VLC_ROW(huff_opd_df),
PS_VLC_ROW(huff_opd_dt),
};
PS_INIT_VLC_STATIC(0, 1544);
PS_INIT_VLC_STATIC(1, 832);
PS_INIT_VLC_STATIC(2, 1024);
PS_INIT_VLC_STATIC(3, 1036);
PS_INIT_VLC_STATIC(4, 544);
PS_INIT_VLC_STATIC(5, 544);
PS_INIT_VLC_STATIC(6, 512);
PS_INIT_VLC_STATIC(7, 512);
PS_INIT_VLC_STATIC(8, 512);
PS_INIT_VLC_STATIC(9, 512);
ps_tableinit();
}
av_cold void ff_ps_ctx_init(PSContext *ps)
{
ff_psdsp_init(&ps->dsp);
}
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