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path: root/core/multimedia/opieplayer/libmpeg3/audio/layer2.c
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Diffstat (limited to 'core/multimedia/opieplayer/libmpeg3/audio/layer2.c') (more/less context) (ignore whitespace changes)
-rw-r--r--core/multimedia/opieplayer/libmpeg3/audio/layer2.c418
1 files changed, 418 insertions, 0 deletions
diff --git a/core/multimedia/opieplayer/libmpeg3/audio/layer2.c b/core/multimedia/opieplayer/libmpeg3/audio/layer2.c
new file mode 100644
index 0000000..01582fe
--- a/dev/null
+++ b/core/multimedia/opieplayer/libmpeg3/audio/layer2.c
@@ -0,0 +1,418 @@
+/*
+ * most other tables are calculated on program start (which is (of course)
+ * not ISO-conform) ..
+ * Layer-3 huffman table is in huffman.h
+ */
+
+#include "mpeg3audio.h"
+#include "../libmpeg3.h"
+#include "../mpeg3protos.h"
+#include "tables.h"
+
+struct al_table alloc_0[] = {
+ {4,0},{5,3},{3,-3},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},{10,-511},
+ {11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},{16,-32767},
+ {4,0},{5,3},{3,-3},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},{10,-511},
+ {11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},{16,-32767},
+ {4,0},{5,3},{3,-3},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},{10,-511},
+ {11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {2,0},{5,3},{7,5},{16,-32767},
+ {2,0},{5,3},{7,5},{16,-32767},
+ {2,0},{5,3},{7,5},{16,-32767},
+ {2,0},{5,3},{7,5},{16,-32767} };
+
+struct al_table alloc_1[] = {
+ {4,0},{5,3},{3,-3},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},{10,-511},
+ {11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},{16,-32767},
+ {4,0},{5,3},{3,-3},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},{10,-511},
+ {11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},{16,-32767},
+ {4,0},{5,3},{3,-3},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},{10,-511},
+ {11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {3,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{16,-32767},
+ {2,0},{5,3},{7,5},{16,-32767},
+ {2,0},{5,3},{7,5},{16,-32767},
+ {2,0},{5,3},{7,5},{16,-32767},
+ {2,0},{5,3},{7,5},{16,-32767},
+ {2,0},{5,3},{7,5},{16,-32767},
+ {2,0},{5,3},{7,5},{16,-32767},
+ {2,0},{5,3},{7,5},{16,-32767} };
+
+struct al_table alloc_2[] = {
+ {4,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},
+ {10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},
+ {4,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},
+ {10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63} };
+
+struct al_table alloc_3[] = {
+ {4,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},
+ {10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},
+ {4,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},{9,-255},
+ {10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191},{15,-16383},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63} };
+
+struct al_table alloc_4[] = {
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191},
+ {4,0},{5,3},{7,5},{3,-3},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},{8,-127},
+ {9,-255},{10,-511},{11,-1023},{12,-2047},{13,-4095},{14,-8191},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {3,0},{5,3},{7,5},{10,9},{4,-7},{5,-15},{6,-31},{7,-63},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9},
+ {2,0},{5,3},{7,5},{10,9} };
+
+
+int mpeg3audio_II_select_table(mpeg3audio_t *audio)
+{
+ static int translate[3][2][16] =
+ {{{ 0,2,2,2,2,2,2,0,0,0,1,1,1,1,1,0},
+ { 0,2,2,0,0,0,1,1,1,1,1,1,1,1,1,0}},
+ {{ 0,2,2,2,2,2,2,0,0,0,0,0,0,0,0,0},
+ { 0,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0}},
+ {{ 0,3,3,3,3,3,3,0,0,0,1,1,1,1,1,0},
+ { 0,3,3,0,0,0,1,1,1,1,1,1,1,1,1,0}}};
+ int table, sblim;
+ static struct al_table *tables[5] =
+ {alloc_0, alloc_1, alloc_2, alloc_3, alloc_4};
+ static int sblims[5] = {27, 30, 8, 12, 30};
+
+ if(audio->lsf)
+ table = 4;
+ else
+ table = translate[audio->sampling_frequency_code][2 - audio->channels][audio->bitrate_index];
+ sblim = sblims[table];
+
+ audio->alloc = tables[table];
+ audio->II_sblimit = sblim;
+ return 0;
+}
+
+int mpeg3audio_II_step_one(mpeg3audio_t *audio, unsigned int *bit_alloc, int *scale)
+{
+ int stereo = audio->channels - 1;
+ int sblimit = audio->II_sblimit;
+ int jsbound = audio->jsbound;
+ int sblimit2 = audio->II_sblimit << stereo;
+ struct al_table *alloc1 = audio->alloc;
+ int i, result = 0;
+ unsigned int *scfsi_buf = audio->layer2_scfsi_buf;
+ unsigned int *scfsi, *bita;
+ int sc, step;
+
+ bita = bit_alloc;
+ if(stereo)
+ {
+/* Stereo */
+ for(i = jsbound;i ; i--, alloc1 += (1 << step))
+ {
+ *bita++ = (char)mpeg3bits_getbits(audio->astream, step = alloc1->bits);
+ *bita++ = (char)mpeg3bits_getbits(audio->astream, step);
+ }
+ for(i = sblimit-jsbound; i; i--, alloc1 += (1 << step))
+ {
+ bita[0] = (char)mpeg3bits_getbits(audio->astream, step = alloc1->bits);
+ bita[1] = bita[0];
+ bita += 2;
+ }
+ bita = bit_alloc;
+ scfsi = scfsi_buf;
+ for(i = sblimit2; i; i--)
+ if(*bita++) *scfsi++ = (char)mpeg3bits_getbits(audio->astream, 2);
+ }
+ else
+ {
+/* mono */
+ for(i = sblimit; i; i--, alloc1 += (1 << step))
+ *bita++ = (char)mpeg3bits_getbits(audio->astream, step = alloc1->bits);
+ bita = bit_alloc;
+ scfsi = scfsi_buf;
+ for(i = sblimit; i; i--) if (*bita++) *scfsi++ = (char)mpeg3bits_getbits(audio->astream, 2);
+ }
+
+ bita = bit_alloc;
+ scfsi = scfsi_buf;
+ for(i = sblimit2; i; i--)
+ {
+ if(*bita++)
+ switch(*scfsi++)
+ {
+ case 0:
+ *scale++ = mpeg3bits_getbits(audio->astream, 6);
+ *scale++ = mpeg3bits_getbits(audio->astream, 6);
+ *scale++ = mpeg3bits_getbits(audio->astream, 6);
+ break;
+ case 1 :
+ *scale++ = sc = mpeg3bits_getbits(audio->astream, 6);
+ *scale++ = sc;
+ *scale++ = mpeg3bits_getbits(audio->astream, 6);
+ break;
+ case 2:
+ *scale++ = sc = mpeg3bits_getbits(audio->astream, 6);
+ *scale++ = sc;
+ *scale++ = sc;
+ break;
+ default: /* case 3 */
+ *scale++ = mpeg3bits_getbits(audio->astream, 6);
+ *scale++ = sc = mpeg3bits_getbits(audio->astream, 6);
+ *scale++ = sc;
+ break;
+ }
+ }
+ return result | mpeg3bits_error(audio->astream);
+}
+
+int mpeg3audio_II_step_two(mpeg3audio_t *audio, unsigned int *bit_alloc, mpeg3_real_t fraction[2][4][SBLIMIT], int *scale, int x1)
+{
+ int i, j, k, ba, result = 0;
+ int channels = audio->channels;
+ int sblimit = audio->II_sblimit;
+ int jsbound = audio->jsbound;
+ struct al_table *alloc2, *alloc1 = audio->alloc;
+ unsigned int *bita = bit_alloc;
+ int d1, step, test;
+
+ for(i = 0; i < jsbound; i++, alloc1 += (1 << step))
+ {
+ step = alloc1->bits;
+ for(j = 0; j < channels; j++)
+ {
+ if(ba = *bita++)
+ {
+ k = (alloc2 = alloc1 + ba)->bits;
+ if((d1 = alloc2->d) < 0)
+ {
+ mpeg3_real_t cm = mpeg3_muls[k][scale[x1]];
+
+ fraction[j][0][i] = ((mpeg3_real_t)((int)mpeg3bits_getbits(audio->astream, k) + d1)) * cm;
+ fraction[j][1][i] = ((mpeg3_real_t)((int)mpeg3bits_getbits(audio->astream, k) + d1)) * cm;
+ fraction[j][2][i] = ((mpeg3_real_t)((int)mpeg3bits_getbits(audio->astream, k) + d1)) * cm;
+ }
+ else
+ {
+ static int *table[] =
+ {0, 0, 0, mpeg3_grp_3tab, 0, mpeg3_grp_5tab, 0, 0, 0, mpeg3_grp_9tab};
+ unsigned int idx, *tab, m = scale[x1];
+
+ idx = (unsigned int)mpeg3bits_getbits(audio->astream, k);
+ tab = (unsigned int*)(table[d1] + idx + idx + idx);
+ fraction[j][0][i] = mpeg3_muls[*tab++][m];
+ fraction[j][1][i] = mpeg3_muls[*tab++][m];
+ fraction[j][2][i] = mpeg3_muls[*tab][m];
+ }
+ scale += 3;
+ }
+ else
+ fraction[j][0][i] = fraction[j][1][i] = fraction[j][2][i] = 0.0;
+ }
+ }
+
+ for(i = jsbound; i < sblimit; i++, alloc1 += (1 << step))
+ {
+ step = alloc1->bits;
+/* channel 1 and channel 2 bitalloc are the same */
+ bita++;
+ if((ba = *bita++))
+ {
+ k=(alloc2 = alloc1+ba)->bits;
+ if((d1 = alloc2->d) < 0)
+ {
+ mpeg3_real_t cm;
+
+ cm = mpeg3_muls[k][scale[x1 + 3]];
+ fraction[1][0][i] = (fraction[0][0][i] = (mpeg3_real_t)((int)mpeg3bits_getbits(audio->astream, k) + d1)) * cm;
+ fraction[1][1][i] = (fraction[0][1][i] = (mpeg3_real_t)((int)mpeg3bits_getbits(audio->astream, k) + d1)) * cm;
+ fraction[1][2][i] = (fraction[0][2][i] = (mpeg3_real_t)((int)mpeg3bits_getbits(audio->astream, k) + d1)) * cm;
+ cm = mpeg3_muls[k][scale[x1]];
+ fraction[0][0][i] *= cm;
+ fraction[0][1][i] *= cm;
+ fraction[0][2][i] *= cm;
+ }
+ else
+ {
+ static int *table[] = {0, 0, 0, mpeg3_grp_3tab, 0, mpeg3_grp_5tab, 0, 0, 0, mpeg3_grp_9tab};
+ unsigned int idx, *tab, m1, m2;
+
+ m1 = scale[x1];
+ m2 = scale[x1+3];
+ idx = (unsigned int)mpeg3bits_getbits(audio->astream, k);
+ tab = (unsigned int*)(table[d1] + idx + idx + idx);
+ fraction[0][0][i] = mpeg3_muls[*tab][m1];
+ fraction[1][0][i] = mpeg3_muls[*tab++][m2];
+ fraction[0][1][i] = mpeg3_muls[*tab][m1];
+ fraction[1][1][i] = mpeg3_muls[*tab++][m2];
+ fraction[0][2][i] = mpeg3_muls[*tab][m1];
+ fraction[1][2][i] = mpeg3_muls[*tab][m2];
+ }
+ scale += 6;
+ }
+ else
+ {
+ fraction[0][0][i] = fraction[0][1][i] = fraction[0][2][i] =
+ fraction[1][0][i] = fraction[1][1][i] = fraction[1][2][i] = 0.0;
+ }
+/*
+ should we use individual scalefac for channel 2 or
+ is the current way the right one , where we just copy channel 1 to
+ channel 2 ??
+ The current 'strange' thing is, that we throw away the scalefac
+ values for the second channel ...!!
+-> changed .. now we use the scalefac values of channel one !!
+*/
+ }
+
+ if(sblimit > SBLIMIT) sblimit = SBLIMIT;
+
+ for(i = sblimit; i < SBLIMIT; i++)
+ for(j = 0; j < channels; j++)
+ fraction[j][0][i] = fraction[j][1][i] = fraction[j][2][i] = 0.0;
+
+ return result | mpeg3bits_error(audio->astream);
+}
+
+int mpeg3audio_dolayer2(mpeg3audio_t *audio)
+{
+ int i, j, result = 0;
+ int channels = audio->channels;
+ mpeg3_real_t fraction[2][4][SBLIMIT]; /* pick_table clears unused subbands */
+ unsigned int bit_alloc[64];
+ int scale[192];
+ int single = audio->single;
+
+ if(audio->error_protection)
+ mpeg3bits_getbits(audio->astream, 16);
+
+ mpeg3audio_II_select_table(audio);
+
+ audio->jsbound = (audio->mode == MPG_MD_JOINT_STEREO) ?
+ (audio->mode_ext << 2) + 4 : audio->II_sblimit;
+
+ if(channels == 1 || single == 3)
+ single = 0;
+
+ result |= mpeg3audio_II_step_one(audio, bit_alloc, scale);
+
+ for(i = 0; i < SCALE_BLOCK && !result; i++)
+ {
+ result |= mpeg3audio_II_step_two(audio, bit_alloc, fraction, scale, i >> 2);
+
+ for(j = 0; j < 3; j++)
+ {
+ if(single >= 0)
+ {
+/* Monaural */
+ mpeg3audio_synth_mono(audio, fraction[single][j], audio->pcm_sample, &(audio->pcm_point));
+ }
+ else
+ {
+/* Stereo */
+ int p1 = audio->pcm_point;
+ mpeg3audio_synth_stereo(audio, fraction[0][j], 0, audio->pcm_sample, &p1);
+ mpeg3audio_synth_stereo(audio, fraction[1][j], 1, audio->pcm_sample, &(audio->pcm_point));
+ }
+
+ if(audio->pcm_point / audio->channels >= audio->pcm_allocated - MPEG3AUDIO_PADDING * audio->channels)
+ {
+/* Need more room */
+ mpeg3audio_replace_buffer(audio, audio->pcm_allocated + MPEG3AUDIO_PADDING * audio->channels);
+ }
+ }
+ }
+
+
+ return result;
+}