virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-01-13 21:28:01 +02:00
Code Issues Releases Activity

avcodec/mpegaudiodec: Share fixed and floating point data and init code

Browse Source 
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-11-17 22:25:35 +01:00
parent b9d475393e
commit 73bc26acb8
4 changed files with 164 additions and 131 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libavcodec/Makefile
View File

@ -119,7 +119,7 @@ OBJS-$(CONFIG_MDCT) += mdct_fixed.o mdct_float.o mdct_fixed_3
OBJS-$(CONFIG_ME_CMP) += me_cmp.o
OBJS-$(CONFIG_MEDIACODEC) += mediacodecdec_common.o mediacodec_surface.o mediacodec_wrapper.o mediacodec_sw_buffer.o
OBJS-$(CONFIG_MPEG_ER) += mpeg_er.o
OBJS-$(CONFIG_MPEGAUDIO) += mpegaudio.o
OBJS-$(CONFIG_MPEGAUDIO) += mpegaudio.o mpegaudiodec_common.o
OBJS-$(CONFIG_MPEGAUDIODSP) += mpegaudiodsp.o \
mpegaudiodsp_data.o \
mpegaudiodsp_fixed.o \

31
libavcodec/mpegaudiodata.h
View File

@ -30,6 +30,7 @@
#include <stdint.h>
#include "internal.h"
#include "vlc.h"
#define MODE_EXT_MS_STEREO 2
#define MODE_EXT_I_STEREO 1
@ -41,4 +42,34 @@ extern const int ff_mpa_quant_steps[17];
extern const int ff_mpa_quant_bits[17];
extern const unsigned char * const ff_mpa_alloc_tables[5];
/* VLCs for decoding layer 3 huffman tables */
extern VLC ff_huff_vlc[16];
extern VLC ff_huff_quad_vlc[2];
/* layer3 scale factor size */
extern const uint8_t ff_slen_table[2][16];
/* number of lsf scale factors for a given size */
extern const uint8_t ff_lsf_nsf_table[6][3][4];
extern const uint8_t ff_mpa_huff_data[32][2];
/* band size tables */
extern const uint8_t ff_band_size_long[9][22];
extern const uint8_t ff_band_size_short[9][13];
/* computed from ff_band_size_long */
extern uint16_t ff_band_index_long[9][23];
extern int16_t *const ff_division_tabs[4];
/* lower 2 bits: modulo 3, higher bits: shift */
extern uint16_t ff_scale_factor_modshift[64];
extern const uint8_t ff_mpa_pretab[2][22];
/* table for alias reduction (XXX: store it as integer !) */
extern const float ff_ci_table[8];
/* Initialize tables shared between the fixed and
* floating point MPEG audio decoders. */
void ff_mpegaudiodec_common_init_static(void);
#endif /* AVCODEC_MPEGAUDIODATA_H */

127
libavcodec/mpegaudiodectab.h → libavcodec/mpegaudiodec_common.c
View File

@ -24,25 +24,34 @@
* mpeg audio layer decoder tables.
*/
#ifndef AVCODEC_MPEGAUDIODECTAB_H
#define AVCODEC_MPEGAUDIODECTAB_H
#include <stddef.h>
#include <stdint.h>
#include "mpegaudio.h"
#include "libavutil/avassert.h"
#include "libavutil/thread.h"
#include "mpegaudiodata.h"
uint16_t ff_scale_factor_modshift[64];
static int16_t division_tab3[1 << 6 ];
static int16_t division_tab5[1 << 8 ];
static int16_t division_tab9[1 << 11];
int16_t *const ff_division_tabs[4] = {
division_tab3, division_tab5, NULL, division_tab9
};
/*******************************************************/
/* layer 3 tables */
/* layer3 scale factor size */
static const uint8_t slen_table[2][16] = {
const uint8_t ff_slen_table[2][16] = {
{ 0, 0, 0, 0, 3, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4 },
{ 0, 1, 2, 3, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 2, 3 },
};
/* number of lsf scale factors for a given size */
static const uint8_t lsf_nsf_table[6][3][4] = {
const uint8_t ff_lsf_nsf_table[6][3][4] = {
{ { 6, 5, 5, 5 }, { 9, 9, 9, 9 }, { 6, 9, 9, 9 } },
{ { 6, 5, 7, 3 }, { 9, 9, 12, 6 }, { 6, 9, 12, 6 } },
{ { 11, 10, 0, 0 }, { 18, 18, 0, 0 }, { 15, 18, 0, 0 } },
@ -52,6 +61,12 @@ static const uint8_t lsf_nsf_table[6][3][4] = {
};
/* mpegaudio layer 3 huffman tables */
VLC ff_huff_vlc[16];
static VLC_TYPE huff_vlc_tables[128 + 128 + 128 + 130 + 128 + 154 + 166 + 142 +
204 + 190 + 170 + 542 + 460 + 662 + 414][2];
VLC ff_huff_quad_vlc[2];
static VLC_TYPE huff_quad_vlc_tables[64 + 16][2];
static const uint8_t mpa_hufflens[] = {
/* Huffman table 1 - 4 entries */
3, 3, 2, 1,
@ -294,7 +309,7 @@ static const uint8_t mpa_huff_sizes_minus_one[] =
3, 8, 8, 15, 15, 35, 35, 35, 63, 63, 63, 255, 255, 255, 255
};
static const uint8_t mpa_huff_data[32][2] = {
const uint8_t ff_mpa_huff_data[32][2] = {
{ 0, 0 },
{ 1, 0 },
{ 2, 0 },
@ -341,8 +356,7 @@ static const uint8_t mpa_quad_bits[2][16] = {
{ 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, },
};
/* band size tables */
static const uint8_t band_size_long[9][22] = {
const uint8_t ff_band_size_long[9][22] = {
{ 4, 4, 4, 4, 4, 4, 6, 6, 8, 8, 10,
12, 16, 20, 24, 28, 34, 42, 50, 54, 76, 158, }, /* 44100 */
{ 4, 4, 4, 4, 4, 4, 6, 6, 6, 8, 10,
@ -363,7 +377,7 @@ static const uint8_t band_size_long[9][22] = {
40, 48, 56, 64, 76, 90, 2, 2, 2, 2, 2, }, /* 8000 */
};
static const uint8_t band_size_short[9][13] = {
const uint8_t ff_band_size_short[9][13] = {
{ 4, 4, 4, 4, 6, 8, 10, 12, 14, 18, 22, 30, 56, }, /* 44100 */
{ 4, 4, 4, 4, 6, 6, 10, 12, 14, 16, 20, 26, 66, }, /* 48000 */
{ 4, 4, 4, 4, 6, 8, 12, 16, 20, 26, 34, 42, 12, }, /* 32000 */
@ -375,14 +389,95 @@ static const uint8_t band_size_short[9][13] = {
{ 8, 8, 8, 12, 16, 20, 24, 28, 36, 2, 2, 2, 26, }, /* 8000 */
};
static const uint8_t mpa_pretab[2][22] = {
uint16_t ff_band_index_long[9][23];
const uint8_t ff_mpa_pretab[2][22] = {
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 3, 2, 0 },
};
/* table for alias reduction (XXX: store it as integer !) */
static const float ci_table[8] = {
const float ff_ci_table[8] = {
-0.6, -0.535, -0.33, -0.185, -0.095, -0.041, -0.0142, -0.0037,
};
#endif /* AVCODEC_MPEGAUDIODECTAB_H */
static av_cold void mpegaudiodec_common_init_static(void)
{
const uint8_t *huff_sym = mpa_huffsymbols, *huff_lens = mpa_hufflens;
int offset;
/* scale factors table for layer 1/2 */
for (int i = 0; i < 64; i++) {
int shift, mod;
/* 1.0 (i = 3) is normalized to 2 ^ FRAC_BITS */
shift = i / 3;
mod = i % 3;
ff_scale_factor_modshift[i] = mod | (shift << 2);
}
/* huffman decode tables */
offset = 0;
for (int i = 0; i < 15;) {
uint16_t tmp_symbols[256];
int nb_codes_minus_one = mpa_huff_sizes_minus_one[i];
int j;
for (j = 0; j <= nb_codes_minus_one; j++) {
uint8_t high = huff_sym[j] & 0xF0, low = huff_sym[j] & 0xF;
tmp_symbols[j] = high << 1 | ((high && low) << 4) | low;
}
ff_huff_vlc[++i].table = huff_vlc_tables + offset;
ff_huff_vlc[i].table_allocated = FF_ARRAY_ELEMS(huff_vlc_tables) - offset;
ff_init_vlc_from_lengths(&ff_huff_vlc[i], 7, j,
huff_lens, 1, tmp_symbols, 2, 2,
0, INIT_VLC_STATIC_OVERLONG, NULL);
offset += ff_huff_vlc[i].table_size;
huff_lens += j;
huff_sym += j;
}
av_assert0(offset == FF_ARRAY_ELEMS(huff_vlc_tables));
offset = 0;
for (int i = 0; i < 2; i++) {
int bits = i == 0 ? 6 : 4;
ff_huff_quad_vlc[i].table = huff_quad_vlc_tables + offset;
ff_huff_quad_vlc[i].table_allocated = 1 << bits;
offset += 1 << bits;
init_vlc(&ff_huff_quad_vlc[i], bits, 16,
mpa_quad_bits[i], 1, 1, mpa_quad_codes[i], 1, 1,
INIT_VLC_USE_NEW_STATIC);
}
av_assert0(offset == FF_ARRAY_ELEMS(huff_quad_vlc_tables));
for (int i = 0; i < 9; i++) {
int k = 0;
for (int j = 0; j < 22; j++) {
ff_band_index_long[i][j] = k;
k += ff_band_size_long[i][j] >> 1;
}
ff_band_index_long[i][22] = k;
}
for (int i = 0; i < 4; i++) {
if (ff_mpa_quant_bits[i] < 0) {
for (int j = 0; j < (1 << (-ff_mpa_quant_bits[i] + 1)); j++) {
int val1, val2, val3, steps;
int val = j;
steps = ff_mpa_quant_steps[i];
val1 = val % steps;
val /= steps;
val2 = val % steps;
val3 = val / steps;
ff_division_tabs[i][j] = val1 + (val2 << 4) + (val3 << 8);
}
}
}
}
av_cold void ff_mpegaudiodec_common_init_static(void)
{
static AVOnce init_static_once = AV_ONCE_INIT;
ff_thread_once(&init_static_once, mpegaudiodec_common_init_static);
}

135
libavcodec/mpegaudiodec_template.c
View File

@ -96,34 +96,13 @@ typedef struct MPADecodeContext {
#define HEADER_SIZE 4
#include "mpegaudiodata.h"
#include "mpegaudiodectab.h"
/* vlc structure for decoding layer 3 huffman tables */
static VLC huff_vlc[16];
static VLC_TYPE huff_vlc_tables[
128 + 128 + 128 + 130 + 128 + 154 + 166 +
142 + 204 + 190 + 170 + 542 + 460 + 662 + 414
][2];
static VLC huff_quad_vlc[2];
static VLC_TYPE huff_quad_vlc_tables[64+16][2];
/* computed from band_size_long */
static uint16_t band_index_long[9][23];
#include "mpegaudio_tablegen.h"
/* intensity stereo coef table */
static INTFLOAT is_table[2][16];
static INTFLOAT is_table_lsf[2][2][16];
static INTFLOAT csa_table[8][4];
static int16_t division_tab3[1 << 6 ];
static int16_t division_tab5[1 << 8 ];
static int16_t division_tab9[1 << 11];
static int16_t * const division_tabs[4] = {
division_tab3, division_tab5, NULL, division_tab9
};
/* lower 2 bits: modulo 3, higher bits: shift */
static uint16_t scale_factor_modshift[64];
/* [i][j]: 2^(-j/3) * FRAC_ONE * 2^(i+2) / (2^(i+2) - 1) */
static int32_t scale_factor_mult[15][3];
/* mult table for layer 2 group quantization */
@ -174,10 +153,10 @@ static void init_long_region(MPADecodeContext *s, GranuleDef *g,
int ra1, int ra2)
{
int l;
g->region_size[0] = band_index_long[s->sample_rate_index][ra1 + 1];
g->region_size[0] = ff_band_index_long[s->sample_rate_index][ra1 + 1];
/* should not overflow */
l = FFMIN(ra1 + ra2 + 2, 22);
g->region_size[1] = band_index_long[s->sample_rate_index][ l];
g->region_size[1] = ff_band_index_long[s->sample_rate_index][ l];
}
static void compute_band_indexes(MPADecodeContext *s, GranuleDef *g)
@ -212,7 +191,7 @@ static inline int l1_unscale(int n, int mant, int scale_factor)
int shift, mod;
int64_t val;
shift = scale_factor_modshift[scale_factor];
shift = ff_scale_factor_modshift[scale_factor];
mod = shift & 3;
shift >>= 2;
val = MUL64((int)(mant + (-1U << n) + 1), scale_factor_mult[n-1][mod]);
@ -225,7 +204,7 @@ static inline int l2_unscale_group(int steps, int mant, int scale_factor)
{
int shift, mod, val;
shift = scale_factor_modshift[scale_factor];
shift = ff_scale_factor_modshift[scale_factor];
mod = shift & 3;
shift >>= 2;
@ -258,18 +237,7 @@ static inline int l3_unscale(int value, int exponent)
static av_cold void decode_init_static(void)
{
const uint8_t *huff_sym = mpa_huffsymbols, *huff_lens = mpa_hufflens;
int i, j, k;
int offset;
/* scale factors table for layer 1/2 */
for (i = 0; i < 64; i++) {
int shift, mod;
/* 1.0 (i = 3) is normalized to 2 ^ FRAC_BITS */
shift = i / 3;
mod = i % 3;
scale_factor_modshift[i] = mod | (shift << 2);
}
int i, j;
/* scale factor multiply for layer 1 */
for (i = 0; i < 15; i++) {
@ -286,72 +254,10 @@ static av_cold void decode_init_static(void)
scale_factor_mult[i][2]);
}
/* huffman decode tables */
offset = 0;
for (int i = 0; i < 15;) {
uint16_t tmp_symbols[256];
int nb_codes_minus_one = mpa_huff_sizes_minus_one[i];
int j;
for (j = 0; j <= nb_codes_minus_one; j++) {
uint8_t high = huff_sym[j] & 0xF0, low = huff_sym[j] & 0xF;
tmp_symbols[j] = high << 1 | ((high && low) << 4) | low;
}
/* XXX: fail test */
huff_vlc[++i].table = huff_vlc_tables + offset;
huff_vlc[i].table_allocated = FF_ARRAY_ELEMS(huff_vlc_tables) - offset;
ff_init_vlc_from_lengths(&huff_vlc[i], 7, j,
huff_lens, 1, tmp_symbols, 2, 2,
0, INIT_VLC_STATIC_OVERLONG, NULL);
offset += huff_vlc[i].table_size;
huff_lens += j;
huff_sym += j;
}
av_assert0(offset == FF_ARRAY_ELEMS(huff_vlc_tables));
offset = 0;
for (i = 0; i < 2; i++) {
int bits = i == 0 ? 6 : 4;
huff_quad_vlc[i].table = huff_quad_vlc_tables+offset;
huff_quad_vlc[i].table_allocated = 1 << bits;
offset += 1 << bits;
init_vlc(&huff_quad_vlc[i], bits, 16,
mpa_quad_bits[i], 1, 1, mpa_quad_codes[i], 1, 1,
INIT_VLC_USE_NEW_STATIC);
}
av_assert0(offset == FF_ARRAY_ELEMS(huff_quad_vlc_tables));
for (i = 0; i < 9; i++) {
k = 0;
for (j = 0; j < 22; j++) {
band_index_long[i][j] = k;
k += band_size_long[i][j] >> 1;
}
band_index_long[i][22] = k;
}
/* compute n ^ (4/3) and store it in mantissa/exp format */
mpegaudio_tableinit();
for (i = 0; i < 4; i++) {
if (ff_mpa_quant_bits[i] < 0) {
for (j = 0; j < (1 << (-ff_mpa_quant_bits[i] + 1)); j++) {
int val1, val2, val3, steps;
int val = j;
steps = ff_mpa_quant_steps[i];
val1 = val % steps;
val /= steps;
val2 = val % steps;
val3 = val / steps;
division_tabs[i][j] = val1 + (val2 << 4) + (val3 << 8);
}
}
}
for (i = 0; i < 7; i++) {
float f;
INTFLOAT v;
@ -386,7 +292,7 @@ static av_cold void decode_init_static(void)
for (i = 0; i < 8; i++) {
double ci, cs, ca;
ci = ci_table[i];
ci = ff_ci_table[i];
cs = 1.0 / sqrt(1.0 + ci * ci);
ca = cs * ci;
#if !USE_FLOATS
@ -402,6 +308,7 @@ static av_cold void decode_init_static(void)
#endif
}
RENAME(ff_mpa_synth_init)();
ff_mpegaudiodec_common_init_static();
}
static av_cold int decode_init(AVCodecContext * avctx)
@ -688,7 +595,7 @@ static int mp_decode_layer2(MPADecodeContext *s)
int v2;
/* 3 values at the same time */
v = get_bits(&s->gb, -bits);
v2 = division_tabs[qindex][v];
v2 = ff_division_tabs[qindex][v];
steps = ff_mpa_quant_steps[qindex];
s->sb_samples[ch][k * 12 + l + 0][i] =
@ -816,8 +723,8 @@ static void exponents_from_scale_factors(MPADecodeContext *s, GranuleDef *g,
gain = g->global_gain - 210;
shift = g->scalefac_scale + 1;
bstab = band_size_long[s->sample_rate_index];
pretab = mpa_pretab[g->preflag];
bstab = ff_band_size_long[s->sample_rate_index];
pretab = ff_mpa_pretab[g->preflag];
for (i = 0; i < g->long_end; i++) {
v0 = gain - ((g->scale_factors[i] + pretab[i]) << shift) + 400;
len = bstab[i];
@ -826,7 +733,7 @@ static void exponents_from_scale_factors(MPADecodeContext *s, GranuleDef *g,
}
if (g->short_start < 13) {
bstab = band_size_short[s->sample_rate_index];
bstab = ff_band_size_short[s->sample_rate_index];
gains[0] = gain - (g->subblock_gain[0] << 3);
gains[1] = gain - (g->subblock_gain[1] << 3);
gains[2] = gain - (g->subblock_gain[2] << 3);
@ -891,9 +798,9 @@ static int huffman_decode(MPADecodeContext *s, GranuleDef *g,
continue;
/* select vlc table */
k = g->table_select[i];
l = mpa_huff_data[k][0];
linbits = mpa_huff_data[k][1];
vlc = &huff_vlc[l];
l = ff_mpa_huff_data[k][0];
linbits = ff_mpa_huff_data[k][1];
vlc = &ff_huff_vlc[l];
if (!l) {
memset(&g->sb_hybrid[s_index], 0, sizeof(*g->sb_hybrid) * 2 * j);
@ -966,7 +873,7 @@ static int huffman_decode(MPADecodeContext *s, GranuleDef *g,
}
/* high frequencies */
vlc = &huff_quad_vlc[g->count1table_select];
vlc = &ff_huff_quad_vlc[g->count1table_select];
last_pos = 0;
while (s_index <= 572) {
int pos, code;
@ -1043,7 +950,7 @@ static void reorder_block(MPADecodeContext *s, GranuleDef *g)
}
for (i = g->short_start; i < 13; i++) {
len = band_size_short[s->sample_rate_index][i];
len = ff_band_size_short[s->sample_rate_index][i];
ptr1 = ptr;
dst = tmp;
for (j = len; j > 0; j--) {
@ -1088,7 +995,7 @@ static void compute_stereo(MPADecodeContext *s, GranuleDef *g0, GranuleDef *g1)
/* for last band, use previous scale factor */
if (i != 11)
k -= 3;
len = band_size_short[s->sample_rate_index][i];
len = ff_band_size_short[s->sample_rate_index][i];
for (l = 2; l >= 0; l--) {
tab0 -= len;
tab1 -= len;
@ -1132,7 +1039,7 @@ found1:
non_zero_found_short[2];
for (i = g1->long_end - 1;i >= 0;i--) {
len = band_size_long[s->sample_rate_index][i];
len = ff_band_size_long[s->sample_rate_index][i];
tab0 -= len;
tab1 -= len;
/* test if non zero band. if so, stop doing i-stereo */
@ -1463,8 +1370,8 @@ static int mp_decode_layer3(MPADecodeContext *s)
int slen, slen1, slen2;
/* MPEG-1 scale factors */
slen1 = slen_table[0][g->scalefac_compress];
slen2 = slen_table[1][g->scalefac_compress];
slen1 = ff_slen_table[0][g->scalefac_compress];
slen2 = ff_slen_table[1][g->scalefac_compress];
ff_dlog(s->avctx, "slen1=%d slen2=%d\n", slen1, slen2);
if (g->block_type == 2) {
n = g->switch_point ? 17 : 18;
@ -1549,7 +1456,7 @@ static int mp_decode_layer3(MPADecodeContext *s)
j = 0;
for (k = 0; k < 4; k++) {
n = lsf_nsf_table[tindex2][tindex][k];
n = ff_lsf_nsf_table[tindex2][tindex][k];
sl = slen[k];
if (sl) {
for (i = 0; i < n; i++)