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SIPR decoder for modes 8k5, 6k5 and 5k0. 

Patch by Vladimir Voroshilov and myself.

Originally committed as revision 21125 to svn://svn.ffmpeg.org/ffmpeg/trunk
tags/v0.6
Vladimir Voroshilov Vitor Sessak 16 years ago
parent
9ea977210c
commit
7bd3096f5f
7 changed files with 886 additions and 1 deletions
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  1. +1
    -0
      Changelog
  2. +2
    -0
      doc/general.texi
  3. +3
    -0
      libavcodec/Makefile
  4. +1
    -0
      libavcodec/allcodecs.c
  5. +1
    -1
      libavcodec/avcodec.h
  6. +608
    -0
      libavcodec/sipr.c
  7. +270
    -0
      libavcodec/siprdata.h

+ 1
- 0
Changelog View File

@@ -48,6 +48,7 @@ version <next>:
- R210 decoder
- Auravision Aura 1 and 2 decoders
- Deluxe Paint Animation playback system
- SIPR decoding for modes 8k5, 6k5 and 5k0





+ 2
- 0
doc/general.texi View File

@@ -618,6 +618,8 @@ following image formats are supported:
@tab Real 28800 bit/s codec
@item RealAudio 3.0 (dnet) @tab IX @tab X
@tab Real low bitrate AC-3 codec
@item RealAudio SIPR / ACELP.NET @tab @tab X
@tab 16 kbps mode not yet supported
@item Shorten @tab @tab X
@item Sierra VMD audio @tab @tab X
@tab Used in Sierra VMD files.


+ 3
- 0
libavcodec/Makefile View File

@@ -260,6 +260,9 @@ OBJS-$(CONFIG_RV40_DECODER) += rv40.o rv34.o h264pred.o rv40dsp.o \
OBJS-$(CONFIG_SGI_DECODER) += sgidec.o
OBJS-$(CONFIG_SGI_ENCODER) += sgienc.o rle.o
OBJS-$(CONFIG_SHORTEN_DECODER) += shorten.o
OBJS-$(CONFIG_SIPR_DECODER) += sipr.o acelp_pitch_delay.o \
celp_math.o acelp_vectors.o \
acelp_filters.o celp_filters.o lsp.o
OBJS-$(CONFIG_SMACKAUD_DECODER) += smacker.o
OBJS-$(CONFIG_SMACKER_DECODER) += smacker.o
OBJS-$(CONFIG_SMC_DECODER) += smc.o


+ 1
- 0
libavcodec/allcodecs.c View File

@@ -232,6 +232,7 @@ void avcodec_register_all(void)
REGISTER_DECODER (RA_144, ra_144);
REGISTER_DECODER (RA_288, ra_288);
REGISTER_DECODER (SHORTEN, shorten);
REGISTER_DECODER (SIPR, sipr);
REGISTER_DECODER (SMACKAUD, smackaud);
REGISTER_ENCDEC (SONIC, sonic);
REGISTER_ENCODER (SONIC_LS, sonic_ls);


+ 1
- 1
libavcodec/avcodec.h View File

@@ -30,7 +30,7 @@
#include "libavutil/avutil.h"

#define LIBAVCODEC_VERSION_MAJOR 52
#define LIBAVCODEC_VERSION_MINOR 46
#define LIBAVCODEC_VERSION_MINOR 47
#define LIBAVCODEC_VERSION_MICRO 0

#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \


+ 608
- 0
libavcodec/sipr.c View File

@@ -0,0 +1,608 @@
/*
* SIPR / ACELP.NET decoder
*
* Copyright (c) 2008 Vladimir Voroshilov
* Copyright (c) 2009 Vitor Sessak
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#include <math.h>
#include <stdint.h>

#include "avcodec.h"
#define ALT_BITSTREAM_READER_LE
#include "get_bits.h"
#include "dsputil.h"

#include "lsp.h"
#include "celp_math.h"
#include "acelp_vectors.h"
#include "acelp_pitch_delay.h"
#include "acelp_filters.h"
#include "celp_filters.h"

#define LSFQ_DIFF_MIN (0.0125 * M_PI)

#define LP_FILTER_ORDER 10

/** Number of past samples needed for excitation interpolation */
#define L_INTERPOL (LP_FILTER_ORDER + 1)

/** Subframe size for all modes except 16k */
#define SUBFR_SIZE 48

#include "siprdata.h"

typedef enum {
MODE_16k,
MODE_8k5,
MODE_6k5,
MODE_5k0,
MODE_COUNT
} SiprMode;

typedef struct {
const char *mode_name;
uint16_t bits_per_frame;
uint8_t subframe_count;
uint8_t frames_per_packet;
float pitch_sharp_factor;

/* bitstream parameters */
uint8_t number_of_fc_indexes;

/** size in bits of the i-th stage vector of quantizer */
uint8_t vq_indexes_bits[5];

/** size in bits of the adaptive-codebook index for every subframe */
uint8_t pitch_delay_bits[5];

uint8_t gp_index_bits;
uint8_t fc_index_bits[10]; ///< size in bits of the fixed codebook indexes
uint8_t gc_index_bits; ///< size in bits of the gain codebook indexes
} SiprModeParam;

static const SiprModeParam modes[MODE_COUNT] = {
[MODE_8k5] = {
.mode_name = "8k5",
.bits_per_frame = 152,
.subframe_count = 3,
.frames_per_packet = 1,
.pitch_sharp_factor = 0.8,

.number_of_fc_indexes = 3,
.vq_indexes_bits = {6, 7, 7, 7, 5},
.pitch_delay_bits = {8, 5, 5},
.gp_index_bits = 0,
.fc_index_bits = {9, 9, 9},
.gc_index_bits = 7
},

[MODE_6k5] = {
.mode_name = "6k5",
.bits_per_frame = 232,
.subframe_count = 3,
.frames_per_packet = 2,
.pitch_sharp_factor = 0.8,

.number_of_fc_indexes = 3,
.vq_indexes_bits = {6, 7, 7, 7, 5},
.pitch_delay_bits = {8, 5, 5},
.gp_index_bits = 0,
.fc_index_bits = {5, 5, 5},
.gc_index_bits = 7
},

[MODE_5k0] = {
.mode_name = "5k0",
.bits_per_frame = 296,
.subframe_count = 5,
.frames_per_packet = 2,
.pitch_sharp_factor = 0.85,

.number_of_fc_indexes = 1,
.vq_indexes_bits = {6, 7, 7, 7, 5},
.pitch_delay_bits = {8, 5, 8, 5, 5},
.gp_index_bits = 0,
.fc_index_bits = {10},
.gc_index_bits = 7
}
};

typedef struct {
AVCodecContext *avctx;
DSPContext dsp;

SiprModeParam m;
SiprMode mode;

float past_pitch_gain;
float lsf_history[LP_FILTER_ORDER];

float excitation[L_INTERPOL + PITCH_DELAY_MAX + 5*SUBFR_SIZE];

DECLARE_ALIGNED_16(float, synth_buf[LP_FILTER_ORDER + 5*SUBFR_SIZE + 6]);

float lsp_history[LP_FILTER_ORDER];
float gain_mem;
float energy_history[4];
float highpass_filt_mem[2];
float postfilter_mem[PITCH_DELAY_MAX + LP_FILTER_ORDER];

/* 5k0 */
float tilt_mem;
float postfilter_agc;
float postfilter_mem5k0[PITCH_DELAY_MAX + LP_FILTER_ORDER];
float postfilter_syn5k0[LP_FILTER_ORDER + SUBFR_SIZE*5];
} SiprContext;

typedef struct {
int vq_indexes[5];
int pitch_delay[5]; ///< pitch delay
int gp_index[5]; ///< adaptive-codebook gain indexes
int16_t fc_indexes[5][10]; ///< fixed-codebook indexes
int gc_index[5]; ///< fixed-codebook gain indexes
} SiprParameters;


static void dequant(float *out, const int *idx, const float *cbs[])
{
int i;
int stride = 2;
int num_vec = 5;

for (i = 0; i < num_vec; i++)
memcpy(out + stride*i, cbs[i] + stride*idx[i], stride*sizeof(float));

}

static void lsf_decode_fp(float *lsfnew, float *lsf_history,
const SiprParameters *parm)
{
int i;
float lsf_tmp[LP_FILTER_ORDER];

dequant(lsf_tmp, parm->vq_indexes, lsf_codebooks);

for (i = 0; i < LP_FILTER_ORDER; i++)
lsfnew[i] = lsf_history[i] * 0.33 + lsf_tmp[i] + mean_lsf[i];

ff_sort_nearly_sorted_floats(lsfnew, LP_FILTER_ORDER - 1);

/* Note that a minimum distance is not enforced between the last value and
the previous one, contrary to what is done in ff_acelp_reorder_lsf() */
ff_set_min_dist_lsf(lsfnew, LSFQ_DIFF_MIN, LP_FILTER_ORDER - 1);
lsfnew[9] = FFMIN(lsfnew[LP_FILTER_ORDER - 1], 1.3 * M_PI);

memcpy(lsf_history, lsf_tmp, LP_FILTER_ORDER * sizeof(*lsf_history));

for (i = 0; i < LP_FILTER_ORDER - 1; i++)
lsfnew[i] = cos(lsfnew[i]);
lsfnew[LP_FILTER_ORDER - 1] *= 6.153848 / M_PI;
}

/** Apply pitch lag to the fixed vector (AMR section 6.1.2). */
static void pitch_sharpening(int pitch_lag_int, float beta,
float *fixed_vector)
{
int i;

for (i = pitch_lag_int; i < SUBFR_SIZE; i++)
fixed_vector[i] += beta * fixed_vector[i - pitch_lag_int];
}

/**
* Extracts decoding parameters from the input bitstream.
* @param parms parameters structure
* @param pgb pointer to initialized GetBitContext structure
*/
static void decode_parameters(SiprParameters* parms, GetBitContext *pgb,
const SiprModeParam *p)
{
int i, j;

for (i = 0; i < 5; i++)
parms->vq_indexes[i] = get_bits(pgb, p->vq_indexes_bits[i]);

for (i = 0; i < p->subframe_count; i++) {
parms->pitch_delay[i] = get_bits(pgb, p->pitch_delay_bits[i]);
parms->gp_index[i] = get_bits(pgb, p->gp_index_bits);

for (j = 0; j < p->number_of_fc_indexes; j++)
parms->fc_indexes[i][j] = get_bits(pgb, p->fc_index_bits[j]);

parms->gc_index[i] = get_bits(pgb, p->gc_index_bits);
}
}

static void lsp2lpc_sipr(const double *lsp, float *Az)
{
int lp_half_order = LP_FILTER_ORDER >> 1;
double buf[lp_half_order + 1];
double pa[lp_half_order + 1];
double *qa = buf + 1;
int i,j;

qa[-1] = 0.0;

ff_lsp2polyf(lsp , pa, lp_half_order );
ff_lsp2polyf(lsp + 1, qa, lp_half_order - 1);

for (i = 1, j = LP_FILTER_ORDER - 1; i < lp_half_order; i++, j--) {
double paf = pa[i] * (1 + lsp[LP_FILTER_ORDER - 1]);
double qaf = (qa[i] - qa[i-2]) * (1 - lsp[LP_FILTER_ORDER - 1]);
Az[i-1] = (paf + qaf) * 0.5;
Az[j-1] = (paf - qaf) * 0.5;
}

Az[lp_half_order - 1] = (1.0 + lsp[LP_FILTER_ORDER - 1]) *
pa[lp_half_order] * 0.5;

Az[LP_FILTER_ORDER - 1] = lsp[LP_FILTER_ORDER - 1];
}

static void sipr_decode_lp(float *lsfnew, const float *lsfold, float *Az,
int num_subfr)
{
double lsfint[LP_FILTER_ORDER];
int i,j;
float t, t0 = 1.0 / num_subfr;

t = t0 * 0.5;
for (i = 0; i < num_subfr; i++) {
for (j = 0; j < LP_FILTER_ORDER; j++)
lsfint[j] = lsfold[j] * (1 - t) + t * lsfnew[j];

lsp2lpc_sipr(lsfint, Az);
Az += LP_FILTER_ORDER;
t += t0;
}
}

/**
* Evaluates the adaptative impulse response.
*/
static void eval_ir(const float *Az, int pitch_lag, float *freq,
float pitch_sharp_factor)
{
float tmp1[SUBFR_SIZE+1], tmp2[LP_FILTER_ORDER+1];
int i;

tmp1[0] = 1.;
for (i = 0; i < LP_FILTER_ORDER; i++) {
tmp1[i+1] = Az[i] * ff_pow_0_55[i];
tmp2[i ] = Az[i] * ff_pow_0_7 [i];
}
memset(tmp1 + 11, 0, 37 * sizeof(float));

ff_celp_lp_synthesis_filterf(freq, tmp2, tmp1, SUBFR_SIZE,
LP_FILTER_ORDER);

pitch_sharpening(pitch_lag, pitch_sharp_factor, freq);
}

/**
* Evaluates the convolution of a vector with a sparse vector.
*/
static void convolute_with_sparse(float *out, const AMRFixed *pulses,
const float *shape, int length)
{
int i, j;

memset(out, 0, length*sizeof(float));
for (i = 0; i < pulses->n; i++)
for (j = pulses->x[i]; j < length; j++)
out[j] += pulses->y[i] * shape[j - pulses->x[i]];
}

/**
* Apply postfilter, very similar to AMR one.
*/
static void postfilter_5k0(SiprContext *ctx, const float *lpc, float *samples)
{
float buf[SUBFR_SIZE + LP_FILTER_ORDER];
float *pole_out = buf + LP_FILTER_ORDER;
float lpc_n[LP_FILTER_ORDER];
float lpc_d[LP_FILTER_ORDER];
int i;

for (i = 0; i < LP_FILTER_ORDER; i++) {
lpc_d[i] = lpc[i] * ff_pow_0_75[i];
lpc_n[i] = lpc[i] * pow_0_5 [i];
};

memcpy(pole_out - LP_FILTER_ORDER, ctx->postfilter_mem,
LP_FILTER_ORDER*sizeof(float));

ff_celp_lp_synthesis_filterf(pole_out, lpc_d, samples, SUBFR_SIZE,
LP_FILTER_ORDER);

memcpy(ctx->postfilter_mem, pole_out + SUBFR_SIZE - LP_FILTER_ORDER,
LP_FILTER_ORDER*sizeof(float));

ff_tilt_compensation(&ctx->tilt_mem, 0.4, pole_out, SUBFR_SIZE);

memcpy(pole_out - LP_FILTER_ORDER, ctx->postfilter_mem5k0,
LP_FILTER_ORDER*sizeof(*pole_out));

memcpy(ctx->postfilter_mem5k0, pole_out + SUBFR_SIZE - LP_FILTER_ORDER,
LP_FILTER_ORDER*sizeof(*pole_out));

ff_celp_lp_zero_synthesis_filterf(samples, lpc_n, pole_out, SUBFR_SIZE,
LP_FILTER_ORDER);

}

static void decode_fixed_sparse(AMRFixed *fixed_sparse, const int16_t *pulses,
SiprMode mode, int low_gain)
{
int i;

switch (mode) {
case MODE_6k5:
for (i = 0; i < 3; i++) {
fixed_sparse->x[i] = 3 * (pulses[i] & 0xf) + i;
fixed_sparse->y[i] = pulses[i] & 0x10 ? -1 : 1;
}
fixed_sparse->n = 3;
break;
case MODE_8k5:
for (i = 0; i < 3; i++) {
fixed_sparse->x[2*i ] = 3 * ((pulses[i] >> 4) & 0xf) + i;
fixed_sparse->x[2*i + 1] = 3 * ( pulses[i] & 0xf) + i;

fixed_sparse->y[2*i ] = (pulses[i] & 0x100) ? -1.0: 1.0;

fixed_sparse->y[2*i + 1] =
(fixed_sparse->x[2*i + 1] < fixed_sparse->x[2*i]) ?
-fixed_sparse->y[2*i ] : fixed_sparse->y[2*i];
}

fixed_sparse->n = 6;
break;
case MODE_5k0:
default:
if (low_gain) {
int offset = (pulses[0] & 0x200) ? 2 : 0;
int val = pulses[0];

for (i = 0; i < 3; i++) {
int index = (val & 0x7) * 6 + 4 - i*2;

fixed_sparse->y[i] = (offset + index) & 0x3 ? -1 : 1;
fixed_sparse->x[i] = index;

val >>= 3;
}
fixed_sparse->n = 3;
} else {
int pulse_subset = (pulses[0] >> 8) & 1;

fixed_sparse->x[0] = ((pulses[0] >> 4) & 15) * 3 + pulse_subset;
fixed_sparse->x[1] = ( pulses[0] & 15) * 3 + pulse_subset + 1;

fixed_sparse->y[0] = pulses[0] & 0x200 ? -1 : 1;
fixed_sparse->y[1] = -fixed_sparse->y[0];
fixed_sparse->n = 2;
}
break;
}
}

static void decode_frame(SiprContext *ctx, SiprParameters *params,
float *out_data)
{
int i, j;
int frame_size = ctx->m.subframe_count * SUBFR_SIZE;
float Az[LP_FILTER_ORDER * ctx->m.subframe_count];
float *excitation;
float ir_buf[SUBFR_SIZE + LP_FILTER_ORDER];
float lsf_new[LP_FILTER_ORDER];
float *impulse_response = ir_buf + LP_FILTER_ORDER;
float *synth = ctx->synth_buf + 16; // 16 instead of LP_FILTER_ORDER for
// memory alignment
int t0_first = 0;
AMRFixed fixed_cb;

memset(ir_buf, 0, LP_FILTER_ORDER * sizeof(float));
lsf_decode_fp(lsf_new, ctx->lsf_history, params);

sipr_decode_lp(lsf_new, ctx->lsp_history, Az, ctx->m.subframe_count);

memcpy(ctx->lsp_history, lsf_new, LP_FILTER_ORDER * sizeof(float));

excitation = ctx->excitation + PITCH_DELAY_MAX + L_INTERPOL;

for (i = 0; i < ctx->m.subframe_count; i++) {
float *pAz = Az + i*LP_FILTER_ORDER;
float fixed_vector[SUBFR_SIZE];
int T0,T0_frac;
float pitch_gain, gain_code, avg_energy;

ff_decode_pitch_lag(&T0, &T0_frac, params->pitch_delay[i], t0_first, i,
ctx->mode == MODE_5k0, 6);

if (i == 0 || (i == 2 && ctx->mode == MODE_5k0))
t0_first = T0;

ff_acelp_interpolatef(excitation, excitation - T0 + (T0_frac <= 0),
ff_b60_sinc, 6,
2 * ((2 + T0_frac)%3 + 1), LP_FILTER_ORDER,
SUBFR_SIZE);

decode_fixed_sparse(&fixed_cb, params->fc_indexes[i], ctx->mode,
ctx->past_pitch_gain < 0.8);

eval_ir(pAz, T0, impulse_response, ctx->m.pitch_sharp_factor);

convolute_with_sparse(fixed_vector, &fixed_cb, impulse_response,
SUBFR_SIZE);

avg_energy =
(0.01 + ff_dot_productf(fixed_vector, fixed_vector, SUBFR_SIZE))/
SUBFR_SIZE;

ctx->past_pitch_gain = pitch_gain = gain_cb[params->gc_index[i]][0];

gain_code = ff_amr_set_fixed_gain(gain_cb[params->gc_index[i]][1],
avg_energy, ctx->energy_history,
34 - 15.0/(log2f(10.0) * 0.05),
pred);

ff_weighted_vector_sumf(excitation, excitation, fixed_vector,
pitch_gain, gain_code, SUBFR_SIZE);

pitch_gain *= 0.5 * pitch_gain;
pitch_gain = FFMIN(pitch_gain, 0.4);

ctx->gain_mem = 0.7 * ctx->gain_mem + 0.3 * pitch_gain;
ctx->gain_mem = FFMIN(ctx->gain_mem, pitch_gain);
gain_code *= ctx->gain_mem;

for (j = 0; j < SUBFR_SIZE; j++)
fixed_vector[j] = excitation[j] - gain_code * fixed_vector[j];

if (ctx->mode == MODE_5k0) {
postfilter_5k0(ctx, pAz, fixed_vector);

ff_celp_lp_synthesis_filterf(ctx->postfilter_syn5k0 + LP_FILTER_ORDER + i*SUBFR_SIZE,
pAz, excitation, SUBFR_SIZE,
LP_FILTER_ORDER);
}

ff_celp_lp_synthesis_filterf(synth + i*SUBFR_SIZE, pAz, fixed_vector,
SUBFR_SIZE, LP_FILTER_ORDER);

excitation += SUBFR_SIZE;
}

memcpy(synth - LP_FILTER_ORDER, synth + frame_size - LP_FILTER_ORDER,
LP_FILTER_ORDER * sizeof(float));

if (ctx->mode == MODE_5k0) {
for (i = 0; i < ctx->m.subframe_count; i++) {
float energy = ff_dot_productf(ctx->postfilter_syn5k0 + LP_FILTER_ORDER + i*SUBFR_SIZE,
ctx->postfilter_syn5k0 + LP_FILTER_ORDER + i*SUBFR_SIZE,
SUBFR_SIZE);
ff_adaptative_gain_control(&synth[i * SUBFR_SIZE], energy,
SUBFR_SIZE, 0.9, &ctx->postfilter_agc);
}

memcpy(ctx->postfilter_syn5k0, ctx->postfilter_syn5k0 + frame_size,
LP_FILTER_ORDER*sizeof(float));
}
memcpy(ctx->excitation, excitation - PITCH_DELAY_MAX - L_INTERPOL,
(PITCH_DELAY_MAX + L_INTERPOL) * sizeof(float));

ff_acelp_apply_order_2_transfer_function(synth,
(const float[2]) {-1.99997 , 1.000000000},
(const float[2]) {-1.93307352, 0.935891986},
0.939805806,
ctx->highpass_filt_mem,
frame_size);

ctx->dsp.vector_clipf(out_data, synth, -1, 32767./(1<<15), frame_size);

}

static av_cold int sipr_decoder_init(AVCodecContext * avctx)
{
SiprContext *ctx = avctx->priv_data;
int i;

if (avctx->bit_rate > 12200) ctx->mode = MODE_16k;
else if (avctx->bit_rate > 7500 ) ctx->mode = MODE_8k5;
else if (avctx->bit_rate > 5750 ) ctx->mode = MODE_6k5;
else ctx->mode = MODE_5k0;

ctx->m = modes[ctx->mode];
av_log(avctx, AV_LOG_DEBUG, "Mode: %s\n", ctx->m.mode_name);

for (i = 0; i < LP_FILTER_ORDER; i++)
ctx->lsp_history[i] = cos((i+1) * M_PI / (LP_FILTER_ORDER + 1));

for (i = 0; i < 4; i++)
ctx->energy_history[i] = -14;

avctx->sample_fmt = SAMPLE_FMT_FLT;

if (ctx->mode == MODE_16k) {
av_log(avctx, AV_LOG_ERROR, "decoding 16kbps SIPR files is not "
"supported yet.\n");
return -1;
}

dsputil_init(&ctx->dsp, avctx);

return 0;
}

static int sipr_decode_frame(AVCodecContext *avctx, void *datap,
int *data_size, AVPacket *avpkt)
{
SiprContext *ctx = avctx->priv_data;
const uint8_t *buf=avpkt->data;
SiprParameters parm;
GetBitContext gb;
float *data = datap;
int i;

ctx->avctx = avctx;
if (avpkt->size < (ctx->m.bits_per_frame >> 3)) {
av_log(avctx, AV_LOG_ERROR,
"Error processing packet: packet size (%d) too small\n",
avpkt->size);

*data_size = 0;
return -1;
}
if (*data_size < SUBFR_SIZE * ctx->m.subframe_count * sizeof(float)) {
av_log(avctx, AV_LOG_ERROR,
"Error processing packet: output buffer (%d) too small\n",
*data_size);

*data_size = 0;
return -1;
}

init_get_bits(&gb, buf, ctx->m.bits_per_frame);

for (i = 0; i < ctx->m.frames_per_packet; i++) {
decode_parameters(&parm, &gb, &ctx->m);
decode_frame(ctx, &parm, data);

data += SUBFR_SIZE * ctx->m.subframe_count;
}

*data_size = ctx->m.frames_per_packet * SUBFR_SIZE *
ctx->m.subframe_count * sizeof(float);

return ctx->m.bits_per_frame >> 3;
};

AVCodec sipr_decoder = {
"sipr",
CODEC_TYPE_AUDIO,
CODEC_ID_SIPR,
sizeof(SiprContext),
sipr_decoder_init,
NULL,
NULL,
sipr_decode_frame,
.long_name = NULL_IF_CONFIG_SMALL("RealAudio SIPR / ACELP.NET"),
};

+ 270
- 0
libavcodec/siprdata.h View File

@@ -0,0 +1,270 @@
/*
* SIPR / ACELP.NET decoder
*
* Copyright (c) 2008 Vladimir Voroshilov
* Copyright (c) 2009 Vitor Sessak
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#ifndef AVCODEC_SIPRDATA_H
#define AVCODEC_SIPRDATA_H

static const float pow_0_5[] = {
1.0/(1 << 1), 1.0/(1 << 2), 1.0/(1 << 3), 1.0/(1 << 4),
1.0/(1 << 5), 1.0/(1 << 6), 1.0/(1 << 7), 1.0/(1 << 8),
1.0/(1 << 9), 1.0/(1 << 10), 1.0/(1 << 11), 1.0/(1 << 12),
1.0/(1 << 13), 1.0/(1 << 14), 1.0/(1 << 15), 1.0/(1 << 16)
};

static const float mean_lsf[10] = {
0.297151, 0.452308, 0.765443, 1.134803, 1.421125,
1.773822, 2.049173, 2.375914, 2.585097, 0.075756
};

static const float lsf_cb1[64][2] = {
{ 0.007587, -0.005843}, { 0.042163, -0.028048}, {-0.017147, -0.060705},
{ 0.013773, -0.038108}, {-0.041563, -0.078571}, {-0.076928, -0.119343},
{ 0.012654, 0.176005}, { 0.059737, 0.156869}, { 0.171767, 0.231837},
{ 0.114030, 0.242047}, { 0.168977, 0.283101}, { 0.146210, 0.397961},
{ 0.249446, 0.268421}, { 0.137074, 0.186724}, {-0.057736, -0.135638},
{-0.109664, -0.124611}, {-0.021234, -0.031174}, {-0.013990, -0.091819},
{-0.040046, -0.111426}, {-0.016830, 0.055361}, { 0.057815, 0.071606},
{ 0.060670, 0.114436}, { 0.106695, 0.140838}, { 0.093601, 0.092793},
{ 0.039593, 0.006142}, {-0.066589, -0.092463}, {-0.102589, -0.171380},
{-0.059621, -0.050671}, { 0.166131, 0.139773}, { 0.213069, 0.190761},
{ 0.061820, 0.037661}, { 0.136471, 0.090823}, {-0.019789, 0.013515},
{ 0.022280, 0.079473}, { 0.215281, 0.461959}, { 0.206497, 0.340077},
{ 0.012249, -0.065596}, { 0.091345, 0.190871}, { 0.019506, 0.037266},
{-0.050702, -0.013223}, {-0.057334, 0.028943}, { 0.291512, 0.371415},
{-0.053467, 0.084160}, { 0.025372, 0.375310}, { 0.269995, 0.566520},
{-0.095259, -0.012353}, { 0.050479, 0.212893}, { 0.101219, 0.049320},
{ 0.072426, 0.283362}, {-0.084116, -0.150542}, {-0.031485, 0.144922},
{ 0.012714, 0.256910}, {-0.009528, 0.102768}, {-0.039572, 0.204967},
{-0.098800, 0.055038}, { 0.020719, 0.128387}, {-0.045559, -0.178373},
{-0.082338, 0.136933}, {-0.058270, 0.292806}, { 0.084242, 0.505112},
{ 0.121825, 0.326386}, {-0.102658, -0.069341}, { 0.071675, 0.004744},
{-0.117763, -0.202608}
};

static const float lsf_cb2[128][2] = {
{ 0.025412, 0.006095}, {-0.069803, 0.010650}, {-0.175957, -0.185800},
{-0.139298, -0.048013}, {-0.156150, -0.129688}, {-0.160523, 0.068022},
{ 0.199683, 0.259982}, { 0.258038, 0.236147}, { 0.367089, 0.304716},
{ 0.251764, 0.305853}, { 0.394314, 0.382153}, { 0.448579, 0.337438},
{ 0.323286, 0.425563}, { 0.015369, 0.123820}, {-0.026770, 0.083881},
{-0.112161, -0.097993}, {-0.221847, -0.161311}, {-0.050014, -0.092862},
{-0.214960, -0.398498}, {-0.114062, -0.241381}, { 0.137950, 0.138852},
{ 0.031529, 0.065719}, { 0.208734, 0.084760}, { 0.157862, 0.057535},
{ 0.124750, 0.011922}, {-0.035227, -0.154397}, {-0.105523, -0.291427},
{-0.073488, -0.201948}, {-0.224184, -0.273290}, {-0.168019, -0.240297},
{-0.271591, -0.384682}, {-0.124784, 0.014253}, { 0.004210, -0.110418},
{ 0.074270, -0.014272}, { 0.053058, -0.068672}, {-0.090098, -0.145019},
{ 0.303214, 0.210323}, { 0.413443, 0.272002}, { 0.356904, 0.230646},
{-0.035186, -0.028579}, {-0.117558, 0.115105}, {-0.159225, 0.218385},
{-0.230178, 0.172901}, {-0.216148, -0.110195}, { 0.309444, 0.101508},
{ 0.250489, 0.118338}, { 0.293324, 0.151205}, {-0.023634, 0.033084},
{ 0.076708, 0.114024}, { 0.123119, 0.087704}, {-0.060265, 0.126543},
{-0.223766, -0.021903}, {-0.241987, -0.328089}, { 0.205598, 0.147925},
{-0.087010, 0.064601}, {-0.287892, -0.286099}, {-0.179451, -0.350781},
{-0.219572, 0.043816}, {-0.217263, 0.245550}, {-0.286743, -0.180981},
{ 0.172659, 0.112620}, {-0.105422, 0.176856}, { 0.006176, -0.051491},
{ 0.099802, 0.176322}, {-0.186620, -0.068980}, { 0.164689, 0.185018},
{ 0.519877, 0.376111}, { 0.521941, 0.533731}, { 0.473375, 0.439534},
{ 0.214235, 0.202476}, { 0.579215, 0.466969}, { 0.310414, 0.271057},
{ 0.257450, 0.058939}, { 0.023936, -0.169464}, {-0.268817, -0.064531},
{-0.174182, -0.000198}, {-0.268405, -0.234529}, {-0.296522, 0.247140},
{ 0.115950, -0.072194}, {-0.303666, 0.149084}, {-0.347762, -0.011002},
{-0.223829, -0.214137}, {-0.278958, -0.457975}, { 0.135500, 0.238466},
{ 0.312730, 0.342760}, { 0.071754, -0.125912}, { 0.485938, 0.260429},
{ 0.037536, 0.179771}, { 0.391493, 0.156938}, { 0.397320, 0.484446},
{-0.308630, -0.342418}, {-0.269599, -0.128453}, {-0.086683, -0.043863},
{ 0.421115, 0.213521}, { 0.082417, 0.049006}, {-0.087873, 0.238126},
{ 0.338899, 0.166131}, {-0.166988, 0.147105}, {-0.167214, -0.294075},
{ 0.588706, 0.328303}, { 0.207270, 0.017671}, {-0.141658, 0.291147},
{-0.140850, 0.374321}, { 0.028180, 0.322510}, {-0.229858, 0.328036},
{-0.060743, -0.260916}, {-0.011131, 0.246442}, {-0.058151, 0.310760},
{-0.127536, -0.186432}, {-0.128523, -0.334884}, {-0.283899, 0.077729},
{-0.031595, 0.181015}, {-0.329330, -0.108630}, {-0.215739, 0.107458},
{ 0.175734, 0.327134}, { 0.255801, 0.176077}, { 0.228265, 0.396859},
{-0.370909, -0.185081}, {-0.355138, -0.300405}, { 0.061669, 0.242616},
{ 0.104489, 0.307995}, {-0.320021, -0.234002}, { 0.077349, 0.416286},
{-0.339471, -0.407609}, {-0.019384, -0.215111}, { 0.168229, -0.032453},
{-0.040140, 0.399658}, {-0.275141, 0.008218}
};

static const float lsf_cb3[128][2] = {
{ 0.024608, 0.006198}, {-0.216616, -0.398169}, {-0.089601, -0.201370},
{-0.121878, -0.305281}, { 0.037913, 0.059320}, { 0.245126, 0.244089},
{ 0.266853, 0.182476}, { 0.319362, 0.203481}, { 0.349945, 0.252644},
{ 0.393849, 0.279272}, { 0.445707, 0.258063}, { 0.387321, 0.200855},
{-0.038818, 0.129603}, {-0.009510, 0.076441}, {-0.023892, -0.028199},
{-0.117134, -0.145990}, {-0.186585, -0.052886}, {-0.034250, -0.084547},
{-0.087443, -0.095426}, {-0.453322, -0.174493}, {-0.363975, -0.148186},
{-0.334413, -0.202479}, {-0.221313, -0.181320}, {-0.131146, -0.050611},
{-0.104706, 0.115139}, { 0.192765, 0.275417}, { 0.014184, 0.194251},
{ 0.154215, 0.226949}, { 0.084031, 0.221759}, { 0.189438, 0.164566},
{ 0.130737, 0.170962}, {-0.066815, 0.062954}, {-0.177176, -0.145167},
{-0.247608, -0.129767}, {-0.187886, -0.293720}, {-0.244036, -0.344655},
{-0.203063, -0.234947}, {-0.292715, -0.158421}, { 0.064990, -0.028164},
{ 0.147664, 0.085995}, { 0.107977, 0.002253}, { 0.071286, 0.027533},
{ 0.021017, -0.049807}, {-0.272056, -0.217857}, {-0.065596, 0.008375},
{-0.150818, -0.195514}, {-0.012767, -0.150787}, { 0.238541, 0.136606},
{ 0.291741, 0.114024}, { 0.202677, 0.103701}, { 0.140985, 0.037759},
{-0.257347, -0.442383}, {-0.320666, -0.319742}, {-0.488725, -0.603660},
{-0.319170, -0.469806}, { 0.014970, -0.101074}, { 0.102209, 0.066790},
{-0.076202, -0.044884}, { 0.073868, 0.152565}, { 0.070755, -0.091358},
{-0.016751, 0.027216}, { 0.071201, 0.096981}, {-0.060975, -0.145638},
{ 0.114156, 0.117587}, {-0.284757, -0.029101}, {-0.253005, -0.073645},
{-0.204028, -0.098492}, {-0.114508, 0.001219}, {-0.225284, -0.011998},
{-0.235670, 0.084330}, { 0.161921, 0.128334}, { 0.025717, 0.119456},
{-0.255292, -0.281471}, {-0.392803, -0.095809}, { 0.039229, -0.152110},
{-0.310905, -0.099233}, {-0.268773, 0.032308}, {-0.340150, 0.013129},
{-0.344890, -0.045157}, {-0.188423, 0.265603}, {-0.168235, -0.000936},
{ 0.000462, 0.297000}, { 0.263674, 0.371214}, {-0.146797, -0.098225},
{-0.386557, -0.282426}, {-0.070940, -0.255550}, { 0.293258, 0.252785},
{ 0.408332, 0.387751}, {-0.381914, -0.358918}, {-0.463621, -0.315560},
{-0.323681, -0.258465}, { 0.250055, 0.071195}, {-0.405256, -0.429754},
{-0.135748, -0.251274}, { 0.186827, 0.060177}, { 0.116742, -0.053526},
{-0.403321, -0.220339}, {-0.414144, -0.021108}, {-0.416877, 0.050184},
{-0.470083, -0.079564}, {-0.315554, 0.219217}, {-0.273183, 0.138437},
{ 0.253231, 0.306374}, { 0.177802, 0.346298}, { 0.210358, 0.207697},
{-0.323480, 0.077519}, {-0.193136, 0.048170}, { 0.114492, 0.292778},
{-0.130766, 0.056677}, {-0.171572, -0.349267}, {-0.370076, -0.536392},
{-0.311109, -0.389953}, { 0.334928, 0.367664}, { 0.351246, 0.438664},
{ 0.518803, 0.331253}, { 0.437061, 0.327257}, { 0.318906, 0.307389},
{-0.025972, -0.206758}, { 0.373278, 0.325438}, { 0.473488, 0.389441},
{ 0.478553, 0.477990}, { 0.332783, 0.153825}, { 0.212098, 0.452336},
{ 0.161522, -0.011212}, { 0.209368, 0.020687}, {-0.086262, 0.204493},
{-0.388643, 0.133640}, {-0.177016, 0.134404}
};

static const float lsf_cb4[128][2] = {
{-0.003594, -0.022447}, { 0.070651, 0.028334}, {-0.290374, -0.018347},
{-0.224495, -0.370312}, {-0.269555, -0.131227}, {-0.122714, -0.267733},
{ 0.173325, 0.138698}, { 0.161946, 0.020687}, { 0.111706, 0.022510},
{ 0.097638, 0.056049}, { 0.139754, 0.059920}, { 0.056549, -0.050586},
{ 0.036301, 0.021501}, {-0.066347, 0.012324}, {-0.066972, 0.096136},
{-0.120062, -0.084201}, { 0.011225, 0.047425}, {-0.012846, -0.067390},
{-0.116201, 0.122874}, {-0.027819, 0.035453}, {-0.024743, 0.072835},
{-0.034061, -0.001310}, { 0.077469, 0.081609}, { 0.128347, 0.139584},
{ 0.183416, 0.086563}, {-0.155839, -0.053775}, {-0.190403, -0.018639},
{-0.202548, -0.062841}, {-0.373733, -0.275094}, {-0.394260, -0.186513},
{-0.465700, -0.220031}, { 0.064400, -0.095825}, {-0.262053, -0.199837},
{-0.167233, -0.094402}, { 0.048600, 0.057567}, {-0.007122, 0.168506},
{ 0.050938, 0.156451}, {-0.060828, 0.147083}, {-0.171889, 0.195822},
{-0.218934, 0.138431}, {-0.270532, 0.195775}, {-0.405818, 0.075643},
{-0.440187, 0.193387}, {-0.484968, 0.157607}, {-0.480560, 0.067230},
{-0.436757, -0.111847}, {-0.040731, -0.040363}, {-0.202319, -0.170457},
{-0.158515, -0.134551}, {-0.356709, -0.378549}, {-0.268820, -0.289831},
{-0.188486, -0.289306}, {-0.148139, -0.177616}, {-0.071591, -0.191128},
{-0.052270, -0.150589}, {-0.020543, -0.116220}, { 0.039584, -0.012592},
{-0.268226, 0.042704}, {-0.209755, 0.069423}, {-0.168964, 0.124504},
{-0.363240, 0.188266}, {-0.524935, -0.025010}, {-0.105894, -0.002699},
{-0.251830, -0.062018}, {-0.310480, -0.082325}, { 0.014652, 0.083127},
{-0.136512, 0.033116}, {-0.073755, -0.025236}, { 0.110766, 0.095954},
{ 0.002878, 0.011838}, {-0.074977, -0.244586}, {-0.047023, -0.081339},
{-0.183249, 0.029525}, { 0.263435, 0.206934}, {-0.156721, -0.229993},
{-0.112224, -0.208941}, {-0.116534, -0.123191}, {-0.073988, -0.111668},
{ 0.029484, -0.137573}, {-0.009802, -0.161685}, {-0.023273, 0.114043},
{-0.332651, 0.049072}, {-0.394009, 0.018608}, {-0.433543, -0.035318},
{-0.368459, -0.108024}, {-0.350215, -0.037617}, {-0.321140, -0.178537},
{ 0.020307, -0.048487}, {-0.210512, -0.232274}, {-0.082140, -0.065443},
{ 0.081961, -0.009340}, { 0.146794, 0.101973}, { 0.213999, 0.124687},
{ 0.100217, -0.054095}, {-0.114411, -0.041403}, {-0.097631, 0.037061},
{-0.099651, -0.157978}, {-0.215790, -0.116550}, {-0.107100, 0.076300},
{ 0.084653, 0.126088}, { 0.246439, 0.091442}, { 0.160077, 0.188536},
{ 0.273900, 0.279190}, { 0.320417, 0.232550}, { 0.132710, -0.018988},
{ 0.018950, -0.091681}, {-0.032073, -0.202906}, { 0.212789, 0.178188},
{ 0.208580, 0.239726}, { 0.049420, 0.099840}, {-0.145695, -0.010619},
{-0.132525, -0.322660}, { 0.019666, 0.126603}, { 0.260809, 0.147727},
{-0.232795, -0.001090}, {-0.049826, 0.225987}, {-0.154774, 0.076614},
{ 0.045032, 0.221397}, { 0.321014, 0.161632}, {-0.062379, 0.053586},
{ 0.132252, 0.246675}, { 0.392627, 0.271905}, {-0.264585, 0.102344},
{-0.327200, 0.121624}, {-0.399642, 0.124445}, {-0.108335, 0.179171},
{ 0.100374, 0.182731}, { 0.203852, 0.049505}
};

static const float lsf_cb5[32][2] = {
{-0.047705, 0.008002}, { 0.011332, 0.065028}, {-0.021796, -0.034777},
{-0.147394, -0.001241}, {-0.001577, 0.020599}, {-0.083827, -0.028975},
{-0.177707, 0.066046}, {-0.043241, -0.165144}, { 0.053322, 0.096519},
{-0.097688, 0.106484}, {-0.023392, 0.111234}, {-0.146747, -0.159360},
{ 0.027241, -0.011806}, {-0.043156, 0.057667}, { 0.019516, -0.062116},
{ 0.025990, 0.162533}, { 0.091888, 0.009720}, {-0.098511, 0.036414},
{ 0.013722, -0.116512}, { 0.054833, -0.180975}, { 0.119497, 0.128774},
{ 0.118378, -0.125997}, { 0.065882, -0.030932}, { 0.120581, -0.039964},
{-0.050561, -0.088577}, { 0.050134, 0.033194}, {-0.129654, -0.075112},
{-0.225334, -0.040234}, { 0.070629, -0.084455}, { 0.095508, 0.063548},
{ 0.150514, 0.034366}, { 0.186092, -0.069272}
};

static const float *lsf_codebooks[] = {
lsf_cb1[0], lsf_cb2[0], lsf_cb3[0], lsf_cb4[0], lsf_cb5[0]
};

static const float gain_cb[128][2] = {
{0.035230, 0.161540}, {0.049223, 0.448359}, {0.057443, 0.809043},
{0.072434, 1.760306}, {0.111491, 0.566418}, {0.112820, 1.098524},
{0.143493, 0.726856}, {0.144840, 0.347800}, {0.180341, 1.050010},
{0.188171, 2.197256}, {0.189771, 0.256947}, {0.198260, 0.484678},
{0.210622, 0.755825}, {0.220694, 0.590788}, {0.237062, 1.322214},
{0.255175, 0.338710}, {0.298980, 0.919051}, {0.314627, 0.520961},
{0.337106, 1.469863}, {0.341422, 2.804546}, {0.363257, 0.736222},
{0.363881, 0.367640}, {0.369850, 1.937934}, {0.370136, 1.075201},
{0.397152, 0.549410}, {0.426557, 0.876015}, {0.450686, 0.215588},
{0.468116, 0.671848}, {0.470495, 1.242034}, {0.474180, 1.739845},
{0.484875, 0.490564}, {0.498917, 0.971238}, {0.530996, 0.785765},
{0.539768, 2.130689}, {0.546021, 0.589544}, {0.546632, 3.050846},
{0.552336, 0.389775}, {0.556302, 1.400103}, {0.559688, 1.105421},
{0.574140, 0.667513}, {0.595547, 0.828943}, {0.597771, 0.496929},
{0.617079, 1.863075}, {0.619657, 1.221713}, {0.621172, 0.950275},
{0.628426, 0.630766}, {0.628689, 4.242164}, {0.640899, 1.529846},
{0.645813, 0.331127}, {0.653056, 0.748168}, {0.662909, 1.077438},
{0.669505, 2.631114}, {0.681570, 1.839298}, {0.687844, 0.903400},
{0.688660, 1.270830}, {0.695070, 0.578227}, {0.697926, 0.428440},
{0.715454, 0.812355}, {0.729981, 1.539357}, {0.737434, 1.106765},
{0.740241, 2.033374}, {0.740871, 0.568460}, {0.752689, 0.698461},
{0.756587, 0.893078}, {0.767797, 0.499246}, {0.768516, 3.712434},
{0.773153, 1.332360}, {0.786125, 1.042996}, {0.788792, 0.238388},
{0.790861, 2.273229}, {0.795338, 1.582767}, {0.809621, 0.595501},
{0.821032, 0.756460}, {0.824590, 0.922925}, {0.826019, 1.186793},
{0.827426, 1.885076}, {0.830080, 6.088666}, {0.837028, 2.819993},
{0.845561, 1.490623}, {0.848323, 0.410436}, {0.856522, 0.729725},
{0.862636, 0.966880}, {0.874561, 1.681660}, {0.874751, 1.177630},
{0.879289, 2.301300}, {0.886671, 0.613068}, {0.896729, 0.781097},
{0.904777, 3.484111}, {0.906098, 1.330892}, {0.919182, 1.877203},
{0.919901, 0.569511}, {0.921772, 1.034126}, {0.922439, 0.376000},
{0.934221, 1.485214}, {0.938842, 0.869135}, {0.939166, 2.378294},
{0.958933, 1.122722}, {0.959042, 0.694098}, {0.960995, 1.743430},
{0.970763, 2.884897}, {0.982881, 0.814506}, {0.990141, 1.330022},
{0.996447, 1.823381}, {1.000013, 0.967498}, {1.000743, 0.480597},
{1.008020, 5.095226}, {1.013883, 2.105435}, {1.026438, 0.691312},
{1.027361, 1.558169}, {1.030123, 3.586526}, {1.033916, 1.118036},
{1.039315, 2.543360}, {1.068596, 0.836380}, {1.081023, 1.318768},
{1.093150, 2.267843}, {1.095607, 1.712383}, {1.102816, 1.037334},
{1.103231, 3.536292}, {1.107320, 0.508615}, {1.150000, 7.999000},
{1.156731, 1.236772}, {1.168428, 2.268084}, {1.184130, 0.775839},
{1.210609, 1.511840}, {1.220663, 4.365683}, {1.224016, 0.983179},
{1.252236, 2.778535}, {1.301176, 1.923126}
};

static const float pred[4] = {
0.200, 0.334, 0.504, 0.691
};

#endif /* AVCODEC_SIPRDATA_H */

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