+++ /dev/null
-#include "../libzmpeg3.h"
-
-int zaudio_decoder_layer_t::
-get_scale_factors_1(int *scf, l3_info_t *l3_info, int ch, int gr)
-{
- static uint8_t slen[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}};
- int i, numbits;
- int num0 = slen[0][l3_info->scalefac_compress];
- int num1 = slen[1][l3_info->scalefac_compress];
- if( l3_info->block_type == 2 ) {
- i = 18;
- numbits = (num0 + num1) * 18;
-
- if( l3_info->mixed_block_flag ) {
- for( ; --i>9; ) *scf++ = stream->get_bits(num0);
- /* num0*17 + num1*18 */
- numbits -= num0;
- }
- while( --i >= 0 ) *scf++ = stream->get_bits(num0);
- for( i=18; --i>=0; ) *scf++ = stream->get_bits(num1);
- /* short[13][0..2] = 0 */
- *scf++ = 0; *scf++ = 0; *scf++ = 0;
- }
- else {
- int scfsi = l3_info->scfsi;
- if( scfsi < 0 ) {
- /* scfsi < 0 => granule == 0 */
- for( i=11; --i>=0; ) *scf++ = stream->get_bits(num0);
- for( i=10; --i>=0; ) *scf++ = stream->get_bits(num1);
- numbits = (num0 + num1) * 10 + num0;
- *scf++ = 0;
- }
- else {
- numbits = 0;
- if( !(scfsi & 0x8) ) {
- for( i=6; --i>=0; ) *scf++ = stream->get_bits(num0);
- numbits += num0 * 6;
- }
- else
- scf += 6;
- if( !(scfsi & 0x4) ) {
- for( i=5; --i>=0; ) *scf++ = stream->get_bits(num0);
- numbits += num0 * 5;
- }
- else
- scf += 5;
- if(!(scfsi & 0x2)) {
- for( i=5; --i>=0; ) *scf++ = stream->get_bits(num1);
- numbits += num1 * 5;
- }
- else
- scf += 5;
- if( !(scfsi & 0x1) ) {
- for( i=5; --i>=0; ) *scf++ = stream->get_bits(num1);
- numbits += num1 * 5;
- }
- else
- scf += 5;
- *scf++ = 0; /* no l[21] in original sources */
- }
- }
- return numbits;
-}
-
-int zaudio_decoder_layer_t::
-get_scale_factors_2(int *scf, l3_info_t *l3_info, int i_stereo)
-{
- int i, j;
- static uint8_t stab[3][6][4] =
- {{{ 6, 5, 5,5 }, { 6, 5, 7,3 }, { 11,10,0,0},
- { 7, 7, 7,0 }, { 6, 6, 6,3 }, { 8, 8,5,0}},
- {{ 9, 9, 9,9 }, { 9, 9,12,6 }, { 18,18,0,0},
- {12,12,12,0 }, {12, 9, 9,6 }, { 15,12,9,0}},
- {{ 6, 9, 9,9 }, { 6, 9,12,6 }, { 15,18,0,0},
- { 6,15,12,0 }, { 6,12, 9,6 }, { 6,18,9,0}}};
-
- /* i_stereo AND second channel -> do_layer3() checks this */
- unsigned int slen = i_stereo ?
- i_slen2[l3_info->scalefac_compress >> 1] :
- n_slen2[l3_info->scalefac_compress];
-
- l3_info->preflag = (slen >> 15) & 0x1;
- int n = 0;
- if( l3_info->block_type == 2 ) {
- ++n;
- if( l3_info->mixed_block_flag ) ++n ;
- }
- uint8_t *pnt = stab[n][(slen >> 12) & 0x7];
- int numbits = 0;
- for( i=0; i<4; ++i ) {
- int num = slen & 0x7;
- slen >>= 3;
- if( num ) {
- for( j=(int)pnt[i]; --j>=0; ) *scf++ = stream->get_bits(num);
- numbits += pnt[i] * num;
- }
- else
- for( j=(int)pnt[i]; --j>=0; ) *scf++ = 0;
- }
-
- n = (n << 1) + 1;
- for( i=0; i<n; ++i )
- *scf++ = 0;
-
- return numbits;
-}
-
-static int pretab1[22] = {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,3,3,3,2,0};
-static int pretab2[22] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
-
-/*
- * Dequantize samples (includes huffman decoding)
- *
- * 24 is enough because tab13 has max. a 19 bit huffvector
- */
-
-#define BITSHIFT ((int)(sizeof(int32_t)-1) * 8)
-#define REFRESH_MASK if( num < BITSHIFT ) { \
- if( -part2remain >= num ) break; \
- do { \
- mask |= stream->get_bits(8) << (BITSHIFT-num); \
- num += 8; part2remain -= 8; \
-} while( num < BITSHIFT ); }
-
-int zaudio_decoder_layer_t::
-dequantize_sample(float xr[SBLIMIT][SSLIMIT], int *scf,
- l3_info_t *l3_info, int sfreq, int part2bits)
-{
- short a, *val;
- float v, vv;
- int i, l[3], cb, mc, *m, *me;
- int shift = 1 + l3_info->scalefac_scale;
- float *xrpnt = (float*)xr;
- int part2remain = l3_info->part2_3_length - part2bits;
- int num = stream->get_bit_offset();
- int32_t mask = stream->get_bits(num);
-
-//zmsgs("1 %08x %d\n", mask, num);
- mask = mask << (BITSHIFT + 8 - num);
- part2remain -= num;
-
- int bv = l3_info->big_values;
- int region1 = l3_info->region1start;
- int region2 = l3_info->region2start;
- int l3 = ((576 >> 1) - bv) >> 1;
- /* we may lose the 'odd' bit here !!, check this later again */
- if( bv <= region1 ) {
- l[0] = bv;
- l[1] = l[2] = 0;
- }
- else {
- l[0] = region1;
- if( bv <= region2 ) {
- l[1] = bv - l[0]; l[2] = 0;
- }
- else {
- l[1] = region2 - l[0];
- l[2] = bv - region2;
- }
- }
-
- if( l3_info->block_type == 2 ) {
- /* decoding with short or mixed mode BandIndex table */
- int max[4];
- int step = 0;
- int lwin = 3;
- cb = 0;
- v = 0.0;
- if( l3_info->mixed_block_flag ) {
- max[0] = max[1] = max[2] = 2;
- max[3] = -1;
- m = map[sfreq][0];
- me = mapend[sfreq][0];
- }
- else {
- /* max[3] not floatly needed in this case */
- max[0] = max[1] = max[2] = max[3] = -1;
- m = map[sfreq][1];
- me = mapend[sfreq][1];
- }
-
- for( mc=i=0; i<2; ++i ) {
- int lp = l[i];
- huffman_t *h = ht + l3_info->table_select[i];
- for( ; lp>0; --lp, --mc ) {
- int x, y;
- if( !mc ) {
- mc = *m++;
- xrpnt = ((float*)xr) + (*m++);
- lwin = *m++;
- cb = *m++;
- if( lwin == 3 ) {
- v = l3_info->pow2gain[(*scf++) << shift];
- step = 1;
- }
- else {
- v = l3_info->full_gain[lwin][(*scf++) << shift];
- step = 3;
- }
- }
-
- val = h->table;
- REFRESH_MASK;
- while( (y=*val++) < 0) {
- if( mask < 0 ) val -= y;
- --num;
- mask <<= 1;
- }
- x = y >> 4;
- y &= 0xf;
-
- if( x == 15 && h->linbits ) {
- max[lwin] = cb;
- REFRESH_MASK;
- x += ((uint32_t)mask) >> (BITSHIFT + 8 - h->linbits);
- num -= h->linbits + 1;
- mask <<= h->linbits;
- vv = ispow[x]*v;
- *xrpnt = mask < 0 ? -vv : vv;
- mask <<= 1;
- }
- else if( x != 0 ) {
- max[lwin] = cb;
- if( -part2remain >= num ) break;
- vv = ispow[x]*v;
- *xrpnt = mask < 0 ? -vv : vv;
- --num;
- mask <<= 1;
- }
- else
- *xrpnt = 0.0;
-
- xrpnt += step;
- if( y == 15 && h->linbits ) {
- max[lwin] = cb;
- REFRESH_MASK;
- y += ((uint32_t) mask) >> (BITSHIFT + 8 - h->linbits);
- num -= h->linbits + 1;
- mask <<= h->linbits;
- vv = ispow[y]*v;
- *xrpnt = mask < 0 ? -vv : vv;
- mask <<= 1;
- }
- else if( y != 0 ) {
- max[lwin] = cb;
- if( -part2remain >= num ) break;
- vv = ispow[y]*v;
- *xrpnt = mask < 0 ? -vv : vv;
- --num;
- mask <<= 1;
- }
- else
- *xrpnt = 0.0;
- xrpnt += step;
- }
- }
-
- for( ;l3 && -part2remain < num; l3--) {
- huffman_t *h = htc + l3_info->count1table_select;
- val = h->table;
-
- REFRESH_MASK;
- while( (a=*val++) < 0) {
- if( mask < 0 ) val -= a;
- --num;
- mask <<= 1;
- }
-
- for( i=0; i<4; ++i ) {
- if( !(i & 1) ) {
- if( !mc ) {
- mc = *m++;
- xrpnt = ((float*)xr) + (*m++);
- lwin = *m++;
- cb = *m++;
- if( lwin == 3 ) {
- v = l3_info->pow2gain[(*scf++) << shift];
- step = 1;
- }
- else {
- v = l3_info->full_gain[lwin][(*scf++) << shift];
- step = 3;
- }
- }
- --mc;
- }
- if( (a & (0x8 >> i)) ) {
- max[lwin] = cb;
- if( -part2remain >= num ) break;
- *xrpnt = mask < 0 ? -v : v;
- --num;
- mask <<= 1;
- }
- else
- *xrpnt = 0.0;
- xrpnt += step;
- }
- }
-
- if( lwin < 3 ) { /* short band? */
- for(;;) {
- while( --mc >= 0 ) {
- /* short band -> step=3 */
- *xrpnt = 0.0; xrpnt += 3;
- *xrpnt = 0.0; xrpnt += 3;
- }
- if( m >= me ) break;
- mc = *m++;
- xrpnt = ((float*)xr) + *m++;
- /* optimize: field will be set to zero at the end of the function */
- if( *m++ == 0 ) break;
- /* cb */
- ++m;
- }
- }
-
- l3_info->maxband[0] = max[0] + 1;
- l3_info->maxband[1] = max[1] + 1;
- l3_info->maxband[2] = max[2] + 1;
- l3_info->maxbandl = max[3] + 1;
- int rmax = max[0] > max[1] ? max[0] : max[1];
- rmax = (rmax > max[2] ? rmax : max[2]) + 1;
- l3_info->maxb = rmax ?
- shortLimit[sfreq][rmax] :
- longLimit[sfreq][max[3] + 1];
- }
- else {
- /* decoding with 'long' BandIndex table (block_type != 2) */
- int *pretab = l3_info->preflag ? pretab1 : pretab2;
- int max = -1;
- cb = 0;
- m = map[sfreq][2];
- v = 0.0;
- mc = 0;
- /* long hash table values */
- for( i=0; i<3; ++i ) {
- int lp = l[i];
- huffman_t *h = ht + l3_info->table_select[i];
- for( ; lp>0; --lp, --mc ) {
- int x, y;
- if( !mc ) {
- mc = *m++;
- cb = *m++;
- v = cb != 21 ?
- l3_info->pow2gain[(*scf++ + *pretab++) << shift] : 0.0;
- }
- val = h->table;
- REFRESH_MASK;
- while( (y=*val++) < 0 ) {
- if( mask < 0 ) val -= y;
- --num;
- mask <<= 1;
- }
- x = y >> 4;
- y &= 0x0f;
-
- if( x == 15 && h->linbits ) {
- max = cb;
- REFRESH_MASK;
- x += ((uint32_t) mask) >> (BITSHIFT + 8 - h->linbits);
- num -= h->linbits + 1;
- mask <<= h->linbits;
- vv = ispow[x]*v;
- *xrpnt++ = mask < 0 ? -vv : vv;
- mask <<= 1;
- }
- else if( x ) {
- max = cb;
- if( -part2remain >= num ) break;
- vv = ispow[x]*v;
- *xrpnt++ = mask < 0 ? -vv : vv;
- --num;
- mask <<= 1;
- }
- else
- *xrpnt++ = 0.0;
-
- if( y == 15 && h->linbits ) {
- max = cb;
- REFRESH_MASK;
- y += ((uint32_t) mask) >> (BITSHIFT + 8 - h->linbits);
- num -= h->linbits + 1;
- mask <<= h->linbits;
- vv = ispow[y]*v;
- *xrpnt++ = mask < 0 ? -vv : vv;
- mask <<= 1;
- }
- else if( y != 0 ) {
- max = cb;
- if( -part2remain >= num ) break;
- vv = ispow[y]*v;
- *xrpnt++ = mask < 0 ? -vv : vv;
- --num;
- mask <<= 1;
- }
- else
- *xrpnt++ = 0.0;
- }
- }
-
- /* short (count1table) values */
- for( ; l3 && -part2remain < num; l3-- ) {
- huffman_t *h = htc + l3_info->count1table_select;
- val = h->table;
- REFRESH_MASK;
- while( (a=*val++) < 0) {
- if( mask < 0 ) val -= a;
- --num;
- mask <<= 1;
- }
-
- for( i=0; i<4; ++i ) {
- if( !(i & 1) ) {
- if( !mc ) {
- mc = *m++;
- cb = *m++;
- v = cb != 21 ?
- l3_info->pow2gain[((*scf++) + (*pretab++)) << shift] : 0.0;
- }
- --mc;
- }
- if( (a & (0x8 >> i)) ) {
- max = cb;
- if( -part2remain >= num ) break;
- *xrpnt++ = mask < 0 ? -v : v;
- --num;
- mask <<= 1;
- }
- else
- *xrpnt++ = 0.0;
- }
- }
-
- l3_info->maxbandl = max + 1;
- l3_info->maxb = longLimit[sfreq][l3_info->maxbandl];
- }
-
- while( xrpnt < &xr[SBLIMIT][0] ) *xrpnt++ = 0.0;
-
- if( -part2remain > num )
- num = -part2remain;
- part2remain += num;
-
- if( num > 0 ) {
- stream->start_reverse();
- stream->get_bits_reverse(num);
- stream->start_forward();
- }
-
-//zmsgs("3 %d %04x\n", stream->bit_number, stream->show_bits(16));
- while( part2remain > 16 ) {
- stream->get_bits(16); /* Dismiss stuffing Bits */
- part2remain -= 16;
- }
-
- if( part2remain > 0 )
- stream->get_bits(part2remain);
- else if( part2remain < 0 ) {
- zmsgs("can't rewind stream %d bits! data=%02x%02x%02x%02x\n", -part2remain,
- (uint8_t)stream->input_ptr[-3], (uint8_t)stream->input_ptr[-2],
- (uint8_t)stream->input_ptr[-1], (uint8_t)stream->input_ptr[0]);
- return 1; /* -> error */
- }
- return 0;
-}
-
-int zaudio_decoder_layer_t::
-get_side_info(l3_sideinfo_t *si, int channels, int ms_stereo,
- long sfreq, int single, int lsf)
-{
- int i, ch, gr;
- int powdiff = (single == 3) ? 4 : 0;
- static const int tabs[2][5] = { { 2,9,5,3,4 } , { 1,8,1,2,9 } };
- const int *tab = tabs[lsf];
-
- si->main_data_begin = stream->get_bits(tab[1]);
- si->private_bits = stream->get_bits(channels == 1 ? tab[2] : tab[3]);
- if( !lsf ) {
- for( ch=0; ch<channels; ++ch ) {
- si->ch[ch].gr[0].scfsi = -1;
- si->ch[ch].gr[1].scfsi = stream->get_bits(4);
- }
- }
-
- for( gr=0; gr<tab[0]; ++gr ) {
- for( ch=0; ch<channels; ++ch ) {
- l3_info_t *l3_info = &(si->ch[ch].gr[gr]);
- l3_info->part2_3_length = stream->get_bits(12);
- l3_info->big_values = stream->get_bits(9);
- if( l3_info->big_values > 288 ) {
- zerrs(" big_values too large! %d\n",l3_info->big_values);
- l3_info->big_values = 288;
- }
- l3_info->pow2gain = gainpow2 + 256 - stream->get_bits(8) + powdiff;
- if( ms_stereo ) l3_info->pow2gain += 2;
- l3_info->scalefac_compress = stream->get_bits(tab[4]);
-
- if(stream->get_bits(1)) {
- /* window switch flag */
- l3_info->block_type = stream->get_bits(2);
- l3_info->mixed_block_flag = stream->get_bits(1);
- l3_info->table_select[0] = stream->get_bits(5);
- l3_info->table_select[1] = stream->get_bits(5);
- /* table_select[2] not needed, because there is no region2, */
- /* but to satisfy some verifications tools we set it either. */
- l3_info->table_select[2] = 0;
- for( i=0; i<3; ++i )
- l3_info->full_gain[i] = l3_info->pow2gain + (stream->get_bits(3) << 3);
-
- if( l3_info->block_type == 0 ) {
- zerr("Blocktype == 0 and window-switching == 1 not allowed.\n");
- return 1;
- }
- /* region_count/start parameters are implicit in this case. */
- if( !lsf || l3_info->block_type == 2 )
- l3_info->region1start = 36 >> 1;
- else {
- /* check this again for 2.5 and sfreq=8 */
- l3_info->region1start = sfreq == 8 ? 108 >> 1 : 54 >> 1;
- }
- l3_info->region2start = 576 >> 1;
- }
- else {
- int r0c, r1c;
- for( i=0; i<3; ++i )
- l3_info->table_select[i] = stream->get_bits(5);
- r0c = stream->get_bits(4);
- r1c = stream->get_bits(3);
- l3_info->region1start = bandInfo[sfreq].longIdx[r0c + 1] >> 1 ;
- l3_info->region2start = bandInfo[sfreq].longIdx[r0c + 1 + r1c + 1] >> 1;
- l3_info->block_type = 0;
- l3_info->mixed_block_flag = 0;
- }
- if( !lsf ) l3_info->preflag = stream->get_bits(1);
- l3_info->scalefac_scale = stream->get_bits(1);
- l3_info->count1table_select = stream->get_bits(1);
- }
- }
- return 0;
-}
-
-int zaudio_decoder_layer_t::
-hybrid( float fsIn[SBLIMIT][SSLIMIT], float tsOut[SSLIMIT][SBLIMIT],
- int ch, l3_info_t *l3_info)
-{
- float *tspnt = (float *) tsOut;
- float *rawout1,*rawout2;
- int i, b, bt, sb;
- int (*zdct)(float *inbuf, float *o1, float *o2, float *wintab, float *tsbuf);
-
- b = mp3_blc[ch];
- rawout1 = mp3_block[b][ch];
- b = -b + 1;
- rawout2 = mp3_block[b][ch];
- mp3_blc[ch] = b;
-
- sb = 0;
- if( l3_info->mixed_block_flag ) {
- sb = 2;
- dct36(fsIn[0], rawout1, rawout2, win[0], tspnt);
- dct36(fsIn[1], rawout1 + 18, rawout2 + 18, win1[0], tspnt + 1);
- rawout1 += 36; rawout2 += 36;
- tspnt += 2;
- }
-
- bt = l3_info->block_type;
- zdct = bt == 2 ? dct12 : dct36;
- for( ; sb <(int)l3_info->maxb; sb+=2, tspnt+=2, rawout1+=36, rawout2+=36 ) {
- zdct(fsIn[sb], rawout1, rawout2, win[bt], tspnt);
- zdct(fsIn[sb + 1], rawout1 + 18, rawout2 + 18, win1[bt], tspnt + 1);
- }
-
- for( ; sb < (int)SBLIMIT; ++sb, ++tspnt ) {
- for( i=0; i<(int)SSLIMIT; ++i ) {
- tspnt[i * SBLIMIT] = *rawout1++;
- *rawout2++ = 0.0;
- }
- }
- return 0;
-}
-
-int zaudio_decoder_layer_t::
-antialias(float xr[SBLIMIT][SSLIMIT], l3_info_t *l3_info)
-{
- int sblim;
- if( l3_info->block_type == 2 ) {
- if( !l3_info->mixed_block_flag ) return 0;
- sblim = 1;
- }
- else
- sblim = l3_info->maxb-1;
-
- /* 31 alias-reduction operations between each pair of sub-bands */
- /* with 8 butterflies between each pair */
-
- float *xr1 = (float*)xr[1];
- for( int sb=sblim; sb > 0; --sb, xr1+=10 ) {
- float *cs = aa_cs;
- float *ca = aa_ca;
- float *xr2 = xr1;
- for( int ss=8; --ss>=0;) {
- /* upper and lower butterfly inputs */
- float bu = *--xr2;
- float bd = *xr1;
- *xr2 = (bu * (*cs) ) - (bd * (*ca) );
- *xr1++ = (bd * (*cs++) ) + (bu * (*ca++) );
- }
- }
- return 0;
-}
-
-/*
- * calculate float channel values for Joint-I-Stereo-mode
- */
-int zaudio_decoder_layer_t::
-calc_i_stereo(float xr_buf[2][SBLIMIT][SSLIMIT], int *scalefac,
- l3_info_t *l3_info, int sfreq, int ms_stereo, int lsf)
-{
- float (*xr)[SBLIMIT*SSLIMIT] = (float (*)[SBLIMIT*SSLIMIT])xr_buf;
- struct bandInfoStruct *bi = &bandInfo[sfreq];
- static const float *tabs[3][2][2] = { /* TODO: optimize as static */
- { { tan1_1, tan2_1 } , { tan1_2, tan2_2 } },
- { { pow1_1[0], pow2_1[0] } , { pow1_2[0], pow2_2[0] } } ,
- { { pow1_1[1], pow2_1[1] } , { pow1_2[1], pow2_2[1] } }
- };
-
- int tab = lsf + (l3_info->scalefac_compress & lsf);
- const float *tab1 = tabs[tab][ms_stereo][0];
- const float *tab2 = tabs[tab][ms_stereo][1];
- if( l3_info->block_type == 2 ) {
- int lwin,do_l = 0;
- if( l3_info->mixed_block_flag ) do_l = 1;
- for(lwin = 0; lwin < 3; lwin++) {
- /* process each window */
- /* get first band with zero values */
- /* sfb is minimal 3 for mixed mode */
- int is_p, sb, idx, sfb = l3_info->maxband[lwin];
- if(sfb > 3) do_l = 0;
-
- for( ; sfb < 12 ; ++sfb ) {
- /* scale: 0-15 */
- is_p = scalefac[sfb * 3 + lwin - l3_info->mixed_block_flag];
- if( is_p != 7 ) {
- sb = bi->shortDiff[sfb];
- idx = bi->shortIdx[sfb] + lwin;
- float t1 = tab1[is_p];
- float t2 = tab2[is_p];
- for( ; sb > 0; --sb, idx+=3 ) {
- float v = xr[0][idx];
- xr[0][idx] = v * t1;
- xr[1][idx] = v * t2;
- }
- }
- }
-
- /* in the original: copy 10 to 11, */
- /* here: copy 11 to 12 maybe still wrong??? (copy 12 to 13?) */
- /* scale: 0-15 */
- is_p = scalefac[11 * 3 + lwin - l3_info->mixed_block_flag];
- sb = bi->shortDiff[12];
- idx = bi->shortIdx[12] + lwin;
- if( is_p != 7 ) {
- float t1, t2;
- t1 = tab1[is_p];
- t2 = tab2[is_p];
- for( ; sb > 0; --sb, idx+=3 ) {
- float v = xr[0][idx];
- xr[0][idx] = v * t1;
- xr[1][idx] = v * t2;
- }
- }
- } /* end for(lwin; .. ; . ) */
-
- /* also check l-part, if ALL bands in the three windows are 'empty' */
- /* and mode = mixed_mode */
- if( do_l ) {
- int sfb = l3_info->maxbandl;
- int idx = bi->longIdx[sfb];
-
- for ( ; sfb < 8; ++sfb ) {
- int sb = bi->longDiff[sfb];
- /* scale: 0-15 */
- int is_p = scalefac[sfb];
- if( is_p != 7 ) {
- float t1, t2;
- t1 = tab1[is_p];
- t2 = tab2[is_p];
- for( ; sb > 0; sb--, idx++) {
- float v = xr[0][idx];
- xr[0][idx] = v * t1;
- xr[1][idx] = v * t2;
- }
- }
- else
- idx += sb;
- }
- }
- }
- else { /* ((l3_info->block_type != 2)) */
- int sfb = l3_info->maxbandl;
- int is_p, idx = bi->longIdx[sfb];
- for( ; sfb < 21; sfb++) {
- int sb = bi->longDiff[sfb];
- /* scale: 0-15 */
- is_p = scalefac[sfb];
- if( is_p != 7 ) {
- float t1 = tab1[is_p];
- float t2 = tab2[is_p];
- for( ; sb > 0; --sb, ++idx ) {
- float v = xr[0][idx];
- xr[0][idx] = v * t1;
- xr[1][idx] = v * t2;
- }
- }
- else
- idx += sb;
- }
-
- is_p = scalefac[20];
- if(is_p != 7) {
- /* copy l-band 20 to l-band 21 */
- float t1 = tab1[is_p];
- float t2 = tab2[is_p];
- for( int sb=bi->longDiff[21]; sb > 0; --sb, ++idx ) {
- float v = xr[0][idx];
- xr[0][idx] = v * t1;
- xr[1][idx] = v * t2;
- }
- }
- } /* ... */
-
- return 0;
-}
-
-int zaudio_decoder_layer_t::
-do_layer3(uint8_t *zframe, int zframe_size, float **zoutput, int render)
-{
- float *in0, *in1;
- int i, n, gr, ch, ss;
- /* max 39 for short[13][3] mode, mixed: 38, long: 22 */
- int scalefacs[2][39];
- l3_sideinfo_t sideinfo;
- int ms_stereo, i_stereo;
- int sfreq = sampling_frequency_code;
- int stereo1, granules;
- int output_offset = 0;
-
-//zmsg("1\n");
- zframe += 4; /* Skip header */
- zframe_size -= 4;
-
- /* flip/init buffer */
- bsbuf = &bsspace[bsnum][512];
- bsnum ^= 1;
- /* Copy frame into history buffer */
- memcpy(bsbuf, zframe, zframe_size);
-//zmsgs(" %d %02x%02x%02x%02x\n", first_frame,
-// (uint8_t)bsbuf[0], (uint8_t)bsbuf[1], (uint8_t)bsbuf[2], (uint8_t)bsbuf[3]);
-
- int prev_len = -1;
- uint8_t *ptr = 0;
- if( !first_frame ) {
- /* Set up bitstream to use buffer */
- stream->use_ptr(bsbuf);
-//zmsgs(" 7 %x\n", stream->show_bits(16));
- /* CRC must be skipped here for proper alignment with the backstep */
- if( error_protection ) stream->get_bits(16);
-//zmsgs(" 8 %x\n", stream->show_bits(16));
- if( channels == 1 ) { /* stream is mono */
- stereo1 = 1;
- single = 0;
- }
- else { /* Stereo */
- stereo1 = 2;
- }
-
- if( mode == md_JOINT_STEREO ) {
- ms_stereo = (mode_ext & 0x2) >> 1;
- i_stereo = mode_ext & 0x1;
- }
- else
- ms_stereo = i_stereo = 0;
- granules = lsf ? 1 : 2;
-//zmsg(" 6\n");
- if( get_side_info(&sideinfo, channels, ms_stereo, sfreq, single, lsf) ) {
- layer_reset();
- return output_offset;
- }
-//zmsg(" 7\n");
- /* Step back */
- if( sideinfo.main_data_begin >= 512 ) return output_offset;
- if( sideinfo.main_data_begin ) {
- prev_len = sideinfo.main_data_begin;
- uint8_t *prev = prev_bsbuf + prev_framesize - prev_len;
-//zmsgs(" 7 %ld %d %ld\n", ssize, sideinfo.main_data_begin, prev_framesize);
- ptr = bsbuf + ssize - prev_len;
- memcpy(ptr, prev, prev_len);
- past_framesize += prev_framesize;
- }
- }
- if( ptr && past_framesize >= prev_len ) {
- stream->use_ptr(ptr);
- for( gr=0; gr<granules; ++gr ) {
- float hybridIn [2][SBLIMIT][SSLIMIT];
- float hybridOut[2][SSLIMIT][SBLIMIT];
-
- l3_info_t *l3_info = &(sideinfo.ch[0].gr[gr]);
- int32_t part2bits;
- part2bits = lsf ?
- get_scale_factors_2(scalefacs[0], l3_info, 0) :
- get_scale_factors_1(scalefacs[0], l3_info, 0, gr);
-//zmsgs("4 %04x\n", stream->show_bits(16));
- if( dequantize_sample(hybridIn[0], scalefacs[0],
- l3_info, sfreq, part2bits) ) {
- layer_reset();
- return output_offset;
- }
-//zmsgs("5 %04x\n", stream->show_bits(16));
- if( channels == 2 ) {
- l3_info_t *l3_info = &(sideinfo.ch[1].gr[gr]);
- int32_t part2bits = lsf ?
- get_scale_factors_2(scalefacs[1], l3_info, i_stereo) :
- get_scale_factors_1(scalefacs[1], l3_info, 1, gr);
-
- if( dequantize_sample(hybridIn[1], scalefacs[1],
- l3_info, sfreq, part2bits) ) {
- layer_reset();
- return output_offset;
- }
-
- if( ms_stereo ) {
- int maxb = sideinfo.ch[0].gr[gr].maxb;
- if( (int)sideinfo.ch[1].gr[gr].maxb > maxb )
- maxb = sideinfo.ch[1].gr[gr].maxb;
- for( i=0; i<(int)SSLIMIT * maxb; ++i ) {
- float tmp0 = ((float*)hybridIn[0])[i];
- float tmp1 = ((float*)hybridIn[1])[i];
- ((float*)hybridIn[0])[i] = tmp0 + tmp1;
- ((float*)hybridIn[1])[i] = tmp0 - tmp1;
- }
- }
-
- if( i_stereo )
- calc_i_stereo(hybridIn, scalefacs[1], l3_info, sfreq, ms_stereo, lsf);
- if( ms_stereo || i_stereo || (single == 3)) {
- if( l3_info->maxb > sideinfo.ch[0].gr[gr].maxb )
- sideinfo.ch[0].gr[gr].maxb = l3_info->maxb;
- else
- l3_info->maxb = sideinfo.ch[0].gr[gr].maxb;
- }
- in0 = (float*)hybridIn[0];
- in1 = (float*)hybridIn[1];
- n = SSLIMIT*l3_info->maxb;
- switch( single ) {
- case 3:
- /* *0.5 done by pow-scale */
- for( i=0; i<n; ++i, ++in0 ) *in0 += *in1++;
- break;
- case 1:
- for( i=0; i<n; ++i ) *in0++ = *in1++;
- break;
- }
- }
-
-//zmsg(" 9\n");
- for(ch = 0; ch < stereo1; ch++) {
- l3_info_t *l3_info = &sideinfo.ch[ch].gr[gr];
-//zmsg(" 9.1\n");
- antialias(hybridIn[ch], l3_info);
-//zmsg(" 9.2\n");
- hybrid(hybridIn[ch], hybridOut[ch], ch, l3_info);
-//zmsg(" 9.3\n");
- }
-//zmsg(" 10\n");
- if( render && (zoutput[0] || (single < 0 && zoutput[1])) ) {
- int offset0 = output_offset;
- if( single >= 0 ) {
- for( ss=0; ss<(int)SSLIMIT; ++ss )
- synth_stereo(hybridOut[0][ss], 0, zoutput[0], &output_offset);
- }
- else {
- for( ss=0; ss<(int)SSLIMIT; ++ss ) {
- int offset1 = offset0;
- if( zoutput[0] )
- synth_stereo(hybridOut[0][ss], 0, zoutput[0], &offset0);
- if( zoutput[1] ) {
- synth_stereo(hybridOut[1][ss], 1, zoutput[1], &offset1);
- offset0 = offset1;
- }
- }
- }
- }
- output_offset += 32 * SSLIMIT;
- }
- }
-
-//zmsg(" 12\n");
- first_frame = 0;
- prev_bsbuf = bsbuf;
- prev_framesize = zframe_size;
- return output_offset;
-}
-
-void zaudio_decoder_layer_t::
-layer_reset()
-{
-//zmsg("1\n");
- first_frame = 1;
- past_framesize = 0;
- bsnum = 0;
- bsbuf = &bsspace[1][512];
- prev_bsbuf = 0;
-/* prev_framesize = 0; */
-/* memset(bsspace, 0, sizeof(bsspace)); */
- memset(mp3_block, 0, sizeof(mp3_block));
- memset(mp3_blc, 0, sizeof(mp3_blc));
- synths_reset();
-}
-
-/* Return 1 if the head check doesn't find a header. */
-int zaudio_decoder_layer_t::
-layer_check(uint8_t *data)
-{
- uint32_t head =
- ((uint32_t)data[0] << 24) | ((uint32_t)data[1] << 16) |
- ((uint32_t)data[2] << 8) | ((uint32_t)data[3]);
- if( (head & 0xffe00000) != 0xffe00000 ) return 1;
- if( !((head >> 17) & 3) ) return 1;
- if( ((head >> 12) & 0xf) == 0xf ) return 1;
- if( !((head >> 12) & 0xf) ) return 1;
- if( ((head >> 10) & 0x3) == 0x3 ) return 1;
- if( ((head >> 19) & 1) == 1 &&
- ((head >> 17) & 3) == 3 &&
- ((head >> 16) & 1) == 1 ) return 1;
- if( (head & 0xffff0000) == 0xfffe0000 ) return 1;
- if( (head & 0xffff0000) == 0xffed0000 ) return 1; /* JPEG header */
- return 0;
-}
-
-int zaudio_decoder_layer_t::
-id3_check(uint8_t *data)
-{
- return data[0]=='I' && data[1]=='D' && data[2]=='3' ? 1 : 0;
-}
-
-/* Decode layer header */
-int zaudio_decoder_layer_t::
-layer3_header(uint8_t *data)
-{
- int zlsf, zmpeg35;
- int zlayer, zchannels, zmode;
- int zsampling_frequency_code;
- uint32_t zheader;
- switch( id3_state ) { /* ID3 tag */
- case id3_IDLE:
- /* Read header */
- if( id3_check(data) ) {
- id3_state = id3_HEADER;
- id3_current_byte = 0;
- return 0;
- }
- break;
-
- case id3_HEADER:
- if( ++id3_current_byte >= 6 ) {
- id3_size =
- ((uint32_t)data[0] << 21) | ((uint32_t)data[1] << 14) |
- ((uint32_t)data[2] << 7) | ((uint32_t)data[3]);
- id3_current_byte = 0;
- id3_state = id3_SKIP;
-//zmsgs("%d %02x%02x%02x%02x size=0x%x layer=%d\n", __LINE__,
-// data[0], data[1], data[2], data[3], id3_size, layer);
- }
- return 0;
-
- case id3_SKIP:
-//zmsgs("%d id3_current_byte=0x%x %02x%02x%02x%02x\n", __LINE__,
-// id3_current_byte, data[0], data[1], data[2], data[3]);
- if( ++id3_current_byte >= id3_size )
- id3_state = id3_IDLE;
- return 0;
- }
-
- if( layer_check(data) ) return 0;
-//zmsgs("%d id3_state=%d %02x%02x%02x%02x\n", __LINE__,
-// id3_state, data[0], data[1], data[2], data[3]);
- zheader =
- ((uint32_t)data[0] << 24) | ((uint32_t)data[1] << 16) |
- ((uint32_t)data[2] << 8) | ((uint32_t)data[3]);
- if( zheader & (1 << 20) ) {
- zlsf = (zheader & (1 << 19)) ? 0x0 : 0x1;
- zmpeg35 = 0;
- }
- else {
- zlsf = 1;
- zmpeg35 = 1;
- }
-
- zlayer = 4 - ((zheader >> 17) & 3);
-//zmsgs("1 %d zheader=%08x zlayer=%d layer=%d\n", __LINE__,
-// zheader, zlayer, layer);
- if( layer != 0 && zlayer != layer ) return 0;
- zsampling_frequency_code = zmpeg35 ?
- 6 + ((zheader >> 10) & 0x3) : ((zheader >> 10) & 0x3) + (zlsf * 3);
-
- if( samplerate != 0 &&
- zsampling_frequency_code != sampling_frequency_code ) return 0;
- zmode = ((zheader >> 6) & 0x3);
- zchannels = (zmode == md_MONO) ? 1 : 2;
-/* if( channels >= 0 && zchannels != channels ) return 0; */
-/* if( zchannels > channels ) channels = zchannels; */
- channels = zchannels;
- layer = zlayer;
- lsf = zlsf;
- mpeg35 = zmpeg35;
- mode = zmode;
- sampling_frequency_code = zsampling_frequency_code;
- samplerate = freqs[sampling_frequency_code];
- error_protection = ((zheader >> 16) & 0x1) ^ 0x1;
- bitrate_index = ((zheader >> 12) & 0xf);
- padding = ((zheader >> 9) & 0x1);
- extension = ((zheader >> 8) & 0x1);
- mode_ext = ((zheader >> 4) & 0x3);
- copyright = ((zheader >> 3) & 0x1);
- original = ((zheader >> 2) & 0x1);
- emphasis = zheader & 0x3;
- single = channels > 1 ? -1 : 3;
- if( !bitrate_index ) return 0;
- bitrate = 1000 * tabsel_123[lsf][layer-1][bitrate_index];
- switch( layer ) {
- case 1:
- framesize = (long)tabsel_123[lsf][0][bitrate_index] * 12000;
- framesize /= freqs[sampling_frequency_code];
- framesize = ((framesize + padding) << 2);
- break;
- case 2:
- framesize = (long)tabsel_123[lsf][1][bitrate_index] * 144000;
- framesize /= freqs[sampling_frequency_code];
- framesize += padding;
- break;
- case 3:
- ssize = lsf ?
- ((channels == 1) ? 9 : 17) :
- ((channels == 1) ? 17 : 32);
- if( error_protection ) ssize += 2;
- framesize = (long)tabsel_123[lsf][2][bitrate_index] * 144000;
- framesize /= freqs[sampling_frequency_code] << lsf;
- framesize += padding;
- break;
- default:
- return 0;
- }
-//zmsgs("%d bitrate=%d framesize=%ld samplerate=%d channels=%d layer=%d\n",
-// __LINE__, bitrate, framesize, samplerate, channels, layer);
- if( bitrate < 64000 && layer != 3 ) return 0;
- if( framesize > (int)MAXFRAMESIZE ) return 0;
-//zmsgs("10 %d\n", layer);
- return framesize;
-}
-
-zaudio_decoder_layer_t::
-audio_decoder_layer_t()
-{
- bo = 1;
- channels = -1;
- stream = new bits_t(0, 0);
- init_decode_tables();
- layer_reset();
-}
-
-zaudio_decoder_layer_t::
-~audio_decoder_layer_t()
-{
- delete stream;
-}
-
projects / goodguy / history.git / blobdiff