46 #define BACKSTEP_SIZE 512
48 #define LAST_BUF_SIZE 2 * BACKSTEP_SIZE + EXTRABYTES
101 0 + 128 + 128 + 128 + 130 + 128 + 154 + 166 +
102 142 + 204 + 190 + 170 + 542 + 460 + 662 + 414
105 0, 128, 128, 128, 130, 128, 154, 166,
106 142, 204, 190, 170, 542, 460, 662, 414
133 #define SCALE_GEN(v) \
134 { FIXR_OLD(1.0 * (v)), FIXR_OLD(0.7937005259 * (v)), FIXR_OLD(0.6299605249 * (v)) }
150 for (i = 0; i < 3; i++) {
160 if (s->sample_rate_index != 8)
165 if (s->sample_rate_index <= 2)
167 else if (s->sample_rate_index != 8)
181 l =
FFMIN(ra1 + ra2 + 2, 22);
189 if(s->sample_rate_index == 8)
194 if (s->sample_rate_index <= 2)
223 return (
int)((val + (1LL << (shift - 1))) >> shift);
237 val = (val + (1 << (shift - 1))) >> shift;
256 m = (m + ((1U << e)>>1)) >> e;
267 for (i = 0; i < 64; i++) {
276 for (i = 0; i < 15; i++) {
279 norm = ((INT64_C(1) <<
n) *
FRAC_ONE) / ((1 <<
n) - 1);
283 ff_dlog(
NULL,
"%d: norm=%x s=%"PRIx32
" %"PRIx32
" %"PRIx32
"\n", i,
294 for (i = 1; i < 16; i++) {
297 uint8_t tmp_bits [512] = { 0 };
298 uint16_t tmp_codes[512] = { 0 };
303 for (x = 0; x < xsize; x++) {
304 for (y = 0; y < xsize; y++) {
305 tmp_bits [(x << 5) | y | ((x&&y)<<4)]= h->
bits [j ];
306 tmp_codes[(x << 5) | y | ((x&&y)<<4)]= h->
codes[j++];
314 tmp_bits, 1, 1, tmp_codes, 2, 2,
321 for (i = 0; i < 2; i++) {
324 init_vlc(&huff_quad_vlc[i], i == 0 ? 7 : 4, 16,
331 for (i = 0; i < 9; i++) {
333 for (j = 0; j < 22; j++) {
344 for (i = 0; i < 4; i++) {
347 int val1, val2, val3, steps;
360 for (i = 0; i < 7; i++) {
364 f = tan((
double)i *
M_PI / 12.0);
365 v =
FIXR(f / (1.0 + f));
373 for (i = 7; i < 16; i++)
376 for (i = 0; i < 16; i++) {
380 for (j = 0; j < 2; j++) {
381 e = -(j + 1) * ((i + 1) >> 1);
392 for (i = 0; i < 8; i++) {
395 cs = 1.0 / sqrt(1.0 + ci * ci);
423 static int initialized_tables = 0;
426 if (!initialized_tables) {
428 initialized_tables = 1;
454 #define C3 FIXHR(0.86602540378443864676/2)
455 #define C4 FIXHR(0.70710678118654752439/2) //0.5 / cos(pi*(9)/36)
456 #define C5 FIXHR(0.51763809020504152469/2) //0.5 / cos(pi*(5)/36)
457 #define C6 FIXHR(1.93185165257813657349/4) //0.5 / cos(pi*(15)/36)
466 in1 = in[1*3] + in[0*3];
467 in2 = in[2*3] + in[1*3];
468 in3 = in[3*3] + in[2*3];
469 in4 = in[4*3] + in[3*3];
470 in5 = in[5*3] + in[4*3];
510 bound = (s->mode_ext + 1) * 4;
515 for (i = 0; i <
bound; i++) {
516 for (ch = 0; ch < s->nb_channels; ch++) {
520 for (i = bound; i <
SBLIMIT; i++)
524 for (i = 0; i <
bound; i++) {
525 for (ch = 0; ch < s->nb_channels; ch++) {
526 if (allocation[ch][i])
530 for (i = bound; i <
SBLIMIT; i++) {
531 if (allocation[0][i]) {
538 for (j = 0; j < 12; j++) {
539 for (i = 0; i <
bound; i++) {
540 for (ch = 0; ch < s->nb_channels; ch++) {
541 n = allocation[
ch][i];
544 v =
l1_unscale(n, mant, scale_factors[ch][i]);
551 for (i = bound; i <
SBLIMIT; i++) {
552 n = allocation[0][i];
576 int scale, qindex,
bits, steps, k, l, m,
b;
580 s->sample_rate, s->lsf);
585 bound = (s->mode_ext + 1) * 4;
589 ff_dlog(s->
avctx,
"bound=%d sblimit=%d\n", bound, sblimit);
597 for (i = 0; i <
bound; i++) {
598 bit_alloc_bits = alloc_table[j];
599 for (ch = 0; ch < s->nb_channels; ch++)
600 bit_alloc[ch][i] =
get_bits(&s->
gb, bit_alloc_bits);
601 j += 1 << bit_alloc_bits;
603 for (i = bound; i < sblimit; i++) {
604 bit_alloc_bits = alloc_table[j];
608 j += 1 << bit_alloc_bits;
612 for (i = 0; i < sblimit; i++) {
613 for (ch = 0; ch < s->nb_channels; ch++) {
614 if (bit_alloc[ch][i])
620 for (i = 0; i < sblimit; i++) {
621 for (ch = 0; ch < s->nb_channels; ch++) {
622 if (bit_alloc[ch][i]) {
623 sf = scale_factors[
ch][i];
624 switch (scale_code[ch][i]) {
652 for (k = 0; k < 3; k++) {
653 for (l = 0; l < 12; l += 3) {
655 for (i = 0; i <
bound; i++) {
656 bit_alloc_bits = alloc_table[j];
657 for (ch = 0; ch < s->nb_channels; ch++) {
658 b = bit_alloc[
ch][i];
660 scale = scale_factors[
ch][i][k];
661 qindex = alloc_table[j+
b];
677 for (m = 0; m < 3; m++) {
690 j += 1 << bit_alloc_bits;
693 for (i = bound; i < sblimit; i++) {
694 bit_alloc_bits = alloc_table[j];
697 int mant, scale0, scale1;
698 scale0 = scale_factors[0][i][k];
699 scale1 = scale_factors[1][i][k];
700 qindex = alloc_table[j+
b];
723 for (m = 0; m < 3; m++) {
740 j += 1 << bit_alloc_bits;
743 for (i = sblimit; i <
SBLIMIT; i++) {
744 for (ch = 0; ch < s->nb_channels; ch++) {
755 #define SPLIT(dst,sf,n) \
757 int m = (sf * 171) >> 9; \
760 } else if (n == 4) { \
763 } else if (n == 5) { \
764 int m = (sf * 205) >> 10; \
767 } else if (n == 6) { \
768 int m = (sf * 171) >> 10; \
778 SPLIT(slen[3], sf, n3)
779 SPLIT(slen[2], sf, n2)
780 SPLIT(slen[1], sf, n1)
788 int len, i, j, k, l,
v0,
shift, gain, gains[3];
798 v0 = gain - ((g->
scale_factors[i] + pretab[i]) << shift) + 400;
800 for (j = len; j > 0; j--)
812 for (l = 0; l < 3; l++) {
814 for (j = len; j > 0; j--)
843 #define READ_FLIP_SIGN(dst,src) \
844 v = AV_RN32A(src) ^ (get_bits1(&s->gb) << 31); \
847 #define READ_FLIP_SIGN(dst,src) \
848 v = -get_bits1(&s->gb); \
849 *(dst) = (*(src) ^ v) - v;
853 int16_t *exponents,
int end_pos2)
857 int last_pos, bits_left;
863 for (i = 0; i < 3; i++) {
864 int j, k, l, linbits;
900 exponent= exponents[s_index];
947 while (s_index <= 572) {
950 if (pos >= end_pos) {
951 if (pos > end_pos2 && last_pos) {
956 av_log(s->
avctx,
AV_LOG_INFO,
"overread, skip %d enddists: %d %d\n", last_pos - pos, end_pos-pos, end_pos2-pos);
974 static const int idxtab[16] = { 3,3,2,2,1,1,1,1,0,0,0,0,0,0,0,0 };
976 int pos = s_index + idxtab[code];
977 code ^= 8 >> idxtab[code];
1013 if (s->sample_rate_index != 8)
1025 for (j = len; j > 0; j--) {
1026 *dst++ = ptr[0*
len];
1027 *dst++ = ptr[1*
len];
1028 *dst++ = ptr[2*
len];
1032 memcpy(ptr1, tmp, len * 3 *
sizeof(*ptr1));
1036 #define ISQRT2 FIXR(0.70710678118654752440)
1041 int sf_max, sf,
len, non_zero_found;
1044 int non_zero_found_short[3];
1059 non_zero_found_short[0] = 0;
1060 non_zero_found_short[1] = 0;
1061 non_zero_found_short[2] = 0;
1068 for (l = 2; l >= 0; l--) {
1071 if (!non_zero_found_short[l]) {
1073 for (j = 0; j <
len; j++) {
1075 non_zero_found_short[l] = 1;
1085 for (j = 0; j <
len; j++) {
1095 for (j = 0; j <
len; j++) {
1106 non_zero_found = non_zero_found_short[0] |
1107 non_zero_found_short[1] |
1108 non_zero_found_short[2];
1110 for (i = g1->
long_end - 1;i >= 0;i--) {
1115 if (!non_zero_found) {
1116 for (j = 0; j <
len; j++) {
1123 k = (i == 21) ? 20 : i;
1129 for (j = 0; j <
len; j++) {
1139 for (j = 0; j <
len; j++) {
1157 for (i = 0; i < 576; i++) {
1160 tab0[i] = tmp0 + tmp1;
1161 tab1[i] = tmp0 - tmp1;
1177 #ifndef compute_antialias
1179 #define AA(j) do { \
1180 float tmp0 = ptr[-1-j]; \
1181 float tmp1 = ptr[ j]; \
1182 ptr[-1-j] = tmp0 * csa_table[j][0] - tmp1 * csa_table[j][1]; \
1183 ptr[ j] = tmp0 * csa_table[j][1] + tmp1 * csa_table[j][0]; \
1186 #define AA(j) do { \
1187 SUINT tmp0 = ptr[-1-j]; \
1188 SUINT tmp1 = ptr[ j]; \
1189 SUINT tmp2 = MULH(tmp0 + tmp1, csa_table[j][0]); \
1190 ptr[-1-j] = 4 * (tmp2 - MULH(tmp1, csa_table[j][2])); \
1191 ptr[ j] = 4 * (tmp2 + MULH(tmp0, csa_table[j][3])); \
1211 for (i = n; i > 0; i--) {
1231 int i, j, mdct_long_end, sblimit;
1236 while (ptr >= ptr1) {
1240 if (p[0] | p[1] | p[2] | p[3] | p[4] | p[5])
1243 sblimit = ((ptr - g->
sb_hybrid) / 18) + 1;
1252 mdct_long_end = sblimit;
1259 buf = mdct_buf + 4*18*(mdct_long_end >> 2) + (mdct_long_end & 3);
1260 ptr = g->
sb_hybrid + 18 * mdct_long_end;
1262 for (j = mdct_long_end; j < sblimit; j++) {
1264 win =
RENAME(ff_mdct_win)[2 + (4 & -(j & 1))];
1265 out_ptr = sb_samples + j;
1267 for (i = 0; i < 6; i++) {
1268 *out_ptr = buf[4*i];
1272 for (i = 0; i < 6; i++) {
1273 *out_ptr =
MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*1)];
1274 buf[4*(i + 6*2)] =
MULH3(out2[i + 6], win[i + 6], 1);
1278 for (i = 0; i < 6; i++) {
1279 *out_ptr =
MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*2)];
1280 buf[4*(i + 6*0)] =
MULH3(out2[i + 6], win[i + 6], 1);
1284 for (i = 0; i < 6; i++) {
1285 buf[4*(i + 6*0)] =
MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*0)];
1286 buf[4*(i + 6*1)] =
MULH3(out2[i + 6], win[i + 6], 1);
1287 buf[4*(i + 6*2)] = 0;
1290 buf += (j&3) != 3 ? 1 : (4*18-3);
1293 for (j = sblimit; j <
SBLIMIT; j++) {
1295 out_ptr = sb_samples + j;
1296 for (i = 0; i < 18; i++) {
1297 *out_ptr = buf[4*i];
1301 buf += (j&3) != 3 ? 1 : (4*18-3);
1308 int nb_granules, main_data_begin;
1309 int gr,
ch, blocksplit_flag, i, j, k,
n, bits_pos;
1311 int16_t exponents[576];
1320 if (s->nb_channels == 2)
1325 for (ch = 0; ch < s->nb_channels; ch++) {
1331 for (gr = 0; gr < nb_granules; gr++) {
1332 for (ch = 0; ch < s->nb_channels; ch++) {
1353 if (blocksplit_flag) {
1360 for (i = 0; i < 2; i++)
1362 for (i = 0; i < 3; i++)
1366 int region_address1, region_address2;
1369 for (i = 0; i < 3; i++)
1375 region_address1, region_address2);
1405 for (gr = 0; gr < nb_granules && (s->
last_buf_size >> 3) < main_data_begin; gr++) {
1406 for (ch = 0; ch < s->nb_channels; ch++) {
1427 for (; gr < nb_granules; gr++) {
1428 for (ch = 0; ch < s->nb_channels; ch++) {
1434 int slen, slen1, slen2;
1439 ff_dlog(s->
avctx,
"slen1=%d slen2=%d\n", slen1, slen2);
1444 for (i = 0; i <
n; i++)
1447 for (i = 0; i <
n; i++)
1451 for (i = 0; i < 18; i++)
1453 for (i = 0; i < 3; i++)
1456 for (i = 0; i < 21; i++)
1462 for (k = 0; k < 4; k++) {
1464 if ((g->
scfsi & (0x8 >> k)) == 0) {
1465 slen = (k < 2) ? slen1 : slen2;
1467 for (i = 0; i <
n; i++)
1470 for (i = 0; i <
n; i++)
1475 for (i = 0; i <
n; i++) {
1484 int tindex, tindex2, slen[4], sl, sf;
1499 }
else if (sf < 244) {
1511 }
else if (sf < 500) {
1522 for (k = 0; k < 4; k++) {
1526 for (i = 0; i <
n; i++)
1529 for (i = 0; i <
n; i++)
1547 for (ch = 0; ch < s->nb_channels; ch++) {
1557 return nb_granules * 18;
1563 int i, nb_frames,
ch, ret;
1569 if (s->error_protection)
1608 av_assert1(i <= buf_size - HEADER_SIZE && i >= 0);
1626 for (ch = 0; ch < s->nb_channels; ch++) {
1629 samples_ptr = samples[
ch];
1632 samples_ptr = samples[0] +
ch;
1633 sample_stride = s->nb_channels;
1635 for (i = 0; i < nb_frames; i++) {
1638 RENAME(ff_mpa_synth_window),
1641 samples_ptr += 32 * sample_stride;
1645 return nb_frames * 32 *
sizeof(
OUT_INT) * s->nb_channels;
1652 int buf_size = avpkt->
size;
1658 while(buf_size && !*buf){
1668 if (header>>8 ==
AV_RB32(
"TAG")>>8) {
1670 return buf_size + skipped;
1676 }
else if (ret == 1) {
1687 if (s->frame_size <= 0) {
1690 }
else if (s->frame_size < buf_size) {
1692 buf_size= s->frame_size;
1715 return buf_size + skipped;
1731 #if CONFIG_MP3ADU_DECODER || CONFIG_MP3ADUFLOAT_DECODER
1733 int *got_frame_ptr,
AVPacket *avpkt)
1736 int buf_size = avpkt->
size;
1755 header =
AV_RB32(buf) | 0xffe00000;
1769 s->frame_size =
len;
1785 #if CONFIG_MP3ON4_DECODER || CONFIG_MP3ON4FLOAT_DECODER
1790 typedef struct MP3On4DecodeContext {
1795 } MP3On4DecodeContext;
1802 static const uint8_t mp3Frames[8] = { 0, 1, 1, 2, 3, 3, 4, 5 };
1805 static const uint8_t chan_offset[8][5] = {
1817 static const int16_t chan_layout[8] = {
1830 MP3On4DecodeContext *s = avctx->
priv_data;
1833 if (s->mp3decctx[0])
1836 for (i = 0; i < s->frames; i++)
1845 MP3On4DecodeContext *s = avctx->
priv_data;
1866 s->syncword = 0xffe00000;
1868 s->syncword = 0xfff00000;
1877 if (!s->mp3decctx[0])
1884 s->mp3decctx[0]->adu_mode = 1;
1889 for (i = 1; i < s->frames; i++) {
1891 if (!s->mp3decctx[i])
1893 s->mp3decctx[i]->adu_mode = 1;
1894 s->mp3decctx[i]->avctx = avctx;
1895 s->mp3decctx[i]->mpadsp = s->mp3decctx[0]->mpadsp;
1896 s->mp3decctx[i]->fdsp = s->mp3decctx[0]->fdsp;
1901 decode_close_mp3on4(avctx);
1909 MP3On4DecodeContext *s = avctx->
priv_data;
1911 for (i = 0; i < s->frames; i++)
1916 static int decode_frame_mp3on4(
AVCodecContext *avctx,
void *data,
1917 int *got_frame_ptr,
AVPacket *avpkt)
1921 int buf_size = avpkt->
size;
1922 MP3On4DecodeContext *s = avctx->
priv_data;
1924 int fsize, len = buf_size, out_size = 0;
1943 for (fr = 0; fr < s->frames; fr++) {
1946 m = s->mp3decctx[fr];
1953 header = (
AV_RB32(buf) & 0x000fffff) | s->syncword;
1961 if (ch + m->nb_channels > avctx->
channels ||
1962 s->coff[fr] + m->nb_channels > avctx->
channels) {
1967 ch += m->nb_channels;
1969 outptr[0] = out_samples[s->coff[fr]];
1970 if (m->nb_channels > 1)
1971 outptr[1] = out_samples[s->coff[fr] + 1];
1976 if (m->nb_channels > 1)
1993 avctx->
sample_rate = s->mp3decctx[0]->sample_rate;
static av_cold void decode_init_static(void)
#define MPA_MAX_CODED_FRAME_SIZE
static int32_t scale_factor_mult[15][3]
#define AV_EF_AGGRESSIVE
consider things that a sane encoder should not do as an error
static double bound(const double threshold, const double val)
const char const char void * val
static int16_t division_tab9[1<< 11]
#define AV_CH_LAYOUT_7POINT1
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static uint32_t table_4_3_value[TABLE_4_3_SIZE]
static const uint8_t lsf_nsf_table[6][3][4]
static int shift(int a, int b)
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
Reference: libavcodec/mpegaudiodec.c.
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
#define AV_LOG_WARNING
Something somehow does not look correct.
int64_t bit_rate
the average bitrate
#define AV_CH_LAYOUT_SURROUND
static void skip_bits_long(GetBitContext *s, int n)
static void exponents_from_scale_factors(MPADecodeContext *s, GranuleDef *g, int16_t *exponents)
static int8_t table_4_3_exp[TABLE_4_3_SIZE]
#define AV_EF_COMPLIANT
consider all spec non compliances as errors
#define AV_EF_BUFFER
detect improper bitstream length
const int ff_mpa_quant_bits[17]
static const uint8_t mpa_pretab[2][22]
#define AV_CH_LAYOUT_4POINT0
#define AV_EF_BITSTREAM
detect bitstream specification deviations
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
#define AV_CH_LAYOUT_STEREO
static av_always_inline void lsf_sf_expand(int *slen, int sf, int n1, int n2, int n3)
uint8_t scale_factors[40]
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
#define AV_CH_LAYOUT_5POINT0
mpeg audio layer common tables.
static const uint8_t slen_table[2][16]
Macro definitions for various function/variable attributes.
#define av_assert0(cond)
assert() equivalent, that is always enabled.
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
enum AVSampleFormat sample_fmt
audio sample format
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
const int ff_mpa_quant_steps[17]
static int l2_unscale_group(int steps, int mant, int scale_factor)
static av_cold void mpegaudio_tableinit(void)
const unsigned char *const ff_mpa_alloc_tables[5]
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
static const uint8_t mpa_huff_data[32][2]
#define SPLIT(dst, sf, n)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
static INTFLOAT csa_table[8][4]
static int l3_unscale(int value, int exponent)
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
static const uint8_t mpa_quad_codes[2][16]
static int get_bits_count(const GetBitContext *s)
bitstream reader API header.
static void switch_buffer(MPADecodeContext *s, int *pos, int *end_pos, int *end_pos2)
static av_cold int decode_close(AVCodecContext *avctx)
static const uint8_t header[24]
static int bit_alloc(AC3EncodeContext *s, int snr_offset)
Run the bit allocation with a given SNR offset.
#define AV_CH_LAYOUT_5POINT1
static int get_bits_left(GetBitContext *gb)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define MODE_EXT_MS_STEREO
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
enum AVSampleFormat request_sample_fmt
desired sample format
static const struct endianess table[]
void(* butterflies_float)(float *av_restrict v1, float *av_restrict v2, int len)
Calculate the sum and difference of two vectors of floats.
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
static void init_long_region(MPADecodeContext *s, GranuleDef *g, int ra1, int ra2)
static uint16_t band_index_long[9][23]
static av_cold int decode_init(AVCodecContext *avctx)
int flags
AV_CODEC_FLAG_*.
simple assert() macros that are a bit more flexible than ISO C assert().
static const uint8_t offset[127][2]
static VLC_TYPE huff_quad_vlc_tables[128+16][2]
static VLC_TYPE huff_vlc_tables[0+128+128+128+130+128+154+166+142+204+190+170+542+460+662+414][2]
uint64_t channel_layout
Audio channel layout.
static const int32_t scale_factor_mult2[3][3]
#define READ_FLIP_SIGN(dst, src)
audio channel layout utility functions
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
static void compute_band_indexes(MPADecodeContext *s, GranuleDef *g)
GLsizei GLboolean const GLfloat * value
uint32_t free_format_next_header
Reference: libavcodec/mpegaudiodec.c.
static int mp_decode_layer2(MPADecodeContext *s)
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
#define FF_ARRAY_ELEMS(a)
static const uint8_t mpa_quad_bits[2][16]
int frame_size
Number of samples per channel in an audio frame.
#define AV_LOG_INFO
Standard information.
Used to store optimal huffman encoding results.
Libavcodec external API header.
int sb_hybrid[SBLIMIT *18]
static const int huff_vlc_tables_sizes[16]
int sample_rate
samples per second
MPA_INT synth_buf[MPA_MAX_CHANNELS][512 *2]
static int mp_decode_layer3(MPADecodeContext *s)
static int mp_decode_frame(MPADecodeContext *s, OUT_INT **samples, const uint8_t *buf, int buf_size)
main external API structure.
static void compute_antialias(MPADecodeContext *s, GranuleDef *g)
static INTFLOAT is_table[2][16]
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
static void mp_flush(MPADecodeContext *ctx)
Replacements for frequently missing libm functions.
static void reorder_block(MPADecodeContext *s, GranuleDef *g)
static unsigned int get_bits1(GetBitContext *s)
uint8_t count1table_select
static void skip_bits(GetBitContext *s, int n)
#define MODE_EXT_I_STEREO
static const int huff_quad_vlc_tables_sizes[2]
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
static uint16_t scale_factor_modshift[64]
av_cold AVFloatDSPContext * avpriv_float_dsp_alloc(int bit_exact)
Allocate a float DSP context.
static INTFLOAT is_table_lsf[2][2][16]
static int16_t division_tab5[1<< 8]
static void init_short_region(MPADecodeContext *s, GranuleDef *g)
static const uint8_t band_size_long[9][22]
static void compute_stereo(MPADecodeContext *s, GranuleDef *g0, GranuleDef *g1)
static int16_t *const division_tabs[4]
static void compute_imdct(MPADecodeContext *s, GranuleDef *g, INTFLOAT *sb_samples, INTFLOAT *mdct_buf)
common internal api header.
#define INIT_VLC_USE_NEW_STATIC
static void imdct12(INTFLOAT *out, SUINTFLOAT *in)
mpeg audio declarations for both encoder and decoder.
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(constuint8_t *) pi-0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(constint16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(constint32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(constint64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0f/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(constfloat *) pi *(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(constdouble *) pi *(INT64_C(1)<< 63)))#defineFMT_PAIR_FUNC(out, in) staticconv_func_type *constfmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB *AV_SAMPLE_FMT_NB]={FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64),};staticvoidcpy1(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, len);}staticvoidcpy2(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 2 *len);}staticvoidcpy4(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 4 *len);}staticvoidcpy8(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 8 *len);}AudioConvert *swri_audio_convert_alloc(enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, constint *ch_map, intflags){AudioConvert *ctx;conv_func_type *f=fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt)+AV_SAMPLE_FMT_NB *av_get_packed_sample_fmt(in_fmt)];if(!f) returnNULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) returnNULL;if(channels==1){in_fmt=av_get_planar_sample_fmt(in_fmt);out_fmt=av_get_planar_sample_fmt(out_fmt);}ctx->channels=channels;ctx->conv_f=f;ctx->ch_map=ch_map;if(in_fmt==AV_SAMPLE_FMT_U8||in_fmt==AV_SAMPLE_FMT_U8P) memset(ctx->silence, 0x80, sizeof(ctx->silence));if(out_fmt==in_fmt &&!ch_map){switch(av_get_bytes_per_sample(in_fmt)){case1:ctx->simd_f=cpy1;break;case2:ctx->simd_f=cpy2;break;case4:ctx->simd_f=cpy4;break;case8:ctx->simd_f=cpy8;break;}}if(HAVE_YASM &&1) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);if(ARCH_AARCH64) swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);returnctx;}voidswri_audio_convert_free(AudioConvert **ctx){av_freep(ctx);}intswri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, intlen){intch;intoff=0;constintos=(out->planar?1:out->ch_count)*out->bps;unsignedmisaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask){intplanes=in->planar?in->ch_count:1;unsignedm=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) in->ch[ch];misaligned|=m &ctx->in_simd_align_mask;}if(ctx->out_simd_align_mask){intplanes=out->planar?out->ch_count:1;unsignedm=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) out->ch[ch];misaligned|=m &ctx->out_simd_align_mask;}if(ctx->simd_f &&!ctx->ch_map &&!misaligned){off=len &~15;av_assert1(off >=0);av_assert1(off<=len);av_assert2(ctx->channels==SWR_CH_MAX||!in->ch[ctx->channels]);if(off >0){if(out->planar==in->planar){intplanes=out->planar?out->ch_count:1;for(ch=0;ch< planes;ch++){ctx->simd_f(out-> ch ch
const int ff_mpa_sblimit_table[5]
int avpriv_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf, int bit_size, int sync_extension)
Parse MPEG-4 systems extradata from a raw buffer to retrieve audio configuration. ...
static int mp_decode_layer1(MPADecodeContext *s)
INTFLOAT mdct_buf[MPA_MAX_CHANNELS][SBLIMIT *18]
int ff_mpa_l2_select_table(int bitrate, int nb_channels, int freq, int lsf)
int channels
number of audio channels
const uint8_t ff_mpeg4audio_channels[8]
MPA_DECODE_HEADER uint8_t last_buf[LAST_BUF_SIZE]
VLC_TYPE(* table)[2]
code, bits
int synth_buf_offset[MPA_MAX_CHANNELS]
static const uint8_t * align_get_bits(GetBitContext *s)
static VLC huff_quad_vlc[2]
static int huffman_decode(MPADecodeContext *s, GranuleDef *g, int16_t *exponents, int end_pos2)
static int64_t fsize(FILE *f)
mpeg audio layer decoder tables.
static int l1_unscale(int n, int mant, int scale_factor)
int sb_samples[MPA_MAX_CHANNELS][36][SBLIMIT]
static const HuffTable mpa_huff_tables[16]
static const float ci_table[8]
uint8_t ** extended_data
pointers to the data planes/channels.
#define AV_CH_LAYOUT_MONO
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
static void region_offset2size(GranuleDef *g)
Convert region offsets to region sizes and truncate size to big_values.
This structure stores compressed data.
av_cold void ff_mpadsp_init(MPADSPContext *s)
int nb_samples
number of audio samples (per channel) described by this frame
static void flush(AVCodecContext *avctx)
static av_always_inline int get_bitsz(GetBitContext *s, int n)
Read 0-25 bits.
static int alloc_table(VLC *vlc, int size, int use_static)
static const uint8_t band_size_short[9][13]
int adu_mode
0 for standard mp3, 1 for adu formatted mp3
static int16_t division_tab3[1<< 6]
GranuleDef granules[2][2]