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-rw-r--r--components/music/layer2.c340
1 files changed, 0 insertions, 340 deletions
diff --git a/components/music/layer2.c b/components/music/layer2.c
deleted file mode 100644
index af234b7af..000000000
--- a/components/music/layer2.c
+++ /dev/null
@@ -1,340 +0,0 @@
-
-/*
- * Mpeg Layer-2 audio decoder
- * --------------------------
- * copyright (c) 1995 by Michael Hipp, All rights reserved. See also 'README'
- *
- */
-
-#include "esd-audio.h"
-#include "mpg123.h"
-#include "l2tables.h"
-#include "getbits.h"
-
-static int grp_3tab[32 * 3] =
-{0,}; /* used: 27 */
-static int grp_5tab[128 * 3] =
-{0,}; /* used: 125 */
-static int grp_9tab[1024 * 3] =
-{0,}; /* used: 729 */
-
-real mpg123_muls[27][64]; /* also used by layer 1 */
-
-/* Used by the getbits macros */
-static unsigned long rval;
-
-void mpg123_init_layer2(void)
-{
- static double mulmul[27] =
- {
- 0.0, -2.0 / 3.0, 2.0 / 3.0,
- 2.0 / 7.0, 2.0 / 15.0, 2.0 / 31.0, 2.0 / 63.0, 2.0 / 127.0, 2.0 / 255.0,
- 2.0 / 511.0, 2.0 / 1023.0, 2.0 / 2047.0, 2.0 / 4095.0, 2.0 / 8191.0,
- 2.0 / 16383.0, 2.0 / 32767.0, 2.0 / 65535.0,
- -4.0 / 5.0, -2.0 / 5.0, 2.0 / 5.0, 4.0 / 5.0,
- -8.0 / 9.0, -4.0 / 9.0, -2.0 / 9.0, 2.0 / 9.0, 4.0 / 9.0, 8.0 / 9.0};
- static int base[3][9] =
- {
- {1, 0, 2,},
- {17, 18, 0, 19, 20,},
- {21, 1, 22, 23, 0, 24, 25, 2, 26}};
- int i, j, k, l, len;
- real *table;
- static int tablen[3] =
- {3, 5, 9};
- static int *itable, *tables[3] =
- {grp_3tab, grp_5tab, grp_9tab};
-
- for (i = 0; i < 3; i++)
- {
- itable = tables[i];
- len = tablen[i];
- for (j = 0; j < len; j++)
- for (k = 0; k < len; k++)
- for (l = 0; l < len; l++)
- {
- *itable++ = base[i][l];
- *itable++ = base[i][k];
- *itable++ = base[i][j];
- }
- }
-
- for (k = 0; k < 27; k++)
- {
- double m = mulmul[k];
-
- table = mpg123_muls[k];
- for (j = 3, i = 0; i < 63; i++, j--)
- *table++ = m * pow(2.0, (double) j / 3.0);
- *table++ = 0.0;
- }
-}
-
-static void
-II_step_one(unsigned int *bit_alloc, int *scale, struct frame *fr)
-{
- int stereo = fr->stereo - 1;
- int sblimit = fr->II_sblimit;
- int jsbound = fr->jsbound;
- int sblimit2 = fr->II_sblimit << stereo;
- struct al_table *alloc1 = fr->alloc;
- int i;
- static unsigned int scfsi_buf[64];
- unsigned int *scfsi, *bita;
- int sc, step;
-
- bita = bit_alloc;
- if (stereo)
- {
- for (i = jsbound; i > 0; i--, alloc1 += (1 << step))
- {
- *bita++ = (char) mpg123_getbits(step = alloc1->bits);
- *bita++ = (char) mpg123_getbits(step);
- }
- for (i = sblimit - jsbound; i > 0; i--, alloc1 += (1 << step))
- {
- bita[0] = (char) mpg123_getbits(step = alloc1->bits);
- bita[1] = bita[0];
- bita += 2;
- }
- bita = bit_alloc;
- scfsi = scfsi_buf;
- for (i = sblimit2; i; i--)
- if (*bita++)
- *scfsi++ = (char) mpg123_getbits_fast(2);
- }
- else
- /* mono */
- {
- for (i = sblimit; i; i--, alloc1 += (1 << step))
- *bita++ = (char) mpg123_getbits(step = alloc1->bits);
- bita = bit_alloc;
- scfsi = scfsi_buf;
- for (i = sblimit; i; i--)
- if (*bita++)
- *scfsi++ = (char) mpg123_getbits_fast(2);
- }
-
- bita = bit_alloc;
- scfsi = scfsi_buf;
- for (i = sblimit2; i; i--)
- if (*bita++)
- switch (*scfsi++)
- {
- case 0:
- *scale++ = mpg123_getbits_fast(6);
- *scale++ = mpg123_getbits_fast(6);
- *scale++ = mpg123_getbits_fast(6);
- break;
- case 1:
- *scale++ = sc = mpg123_getbits_fast(6);
- *scale++ = sc;
- *scale++ = mpg123_getbits_fast(6);
- break;
- case 2:
- *scale++ = sc = mpg123_getbits_fast(6);
- *scale++ = sc;
- *scale++ = sc;
- break;
- default: /* case 3 */
- *scale++ = mpg123_getbits_fast(6);
- *scale++ = sc = mpg123_getbits_fast(6);
- *scale++ = sc;
- break;
- }
-
-}
-
-static void
-II_step_two(unsigned int *bit_alloc, real fraction[2][4][SBLIMIT], int *scale, struct frame *fr, int x1)
-{
- int i, j, k, ba;
- int stereo = fr->stereo;
- int sblimit = fr->II_sblimit;
- int jsbound = fr->jsbound;
- struct al_table *alloc2, *alloc1 = fr->alloc;
- unsigned int *bita = bit_alloc;
- int d1, step;
-
- for (i = 0; i < jsbound; i++, alloc1 += (1 << step))
- {
- step = alloc1->bits;
- for (j = 0; j < stereo; j++)
- {
- if ((ba = *bita++))
- {
- k = (alloc2 = alloc1 + ba)->bits;
- if ((d1 = alloc2->d) < 0)
- {
- real cm = mpg123_muls[k][scale[x1]];
-
- fraction[j][0][i] = ((real) ((int) mpg123_getbits(k) + d1)) * cm;
- fraction[j][1][i] = ((real) ((int) mpg123_getbits(k) + d1)) * cm;
- fraction[j][2][i] = ((real) ((int) mpg123_getbits(k) + d1)) * cm;
- }
- else
- {
- static int *table[] =
- {0, 0, 0, grp_3tab, 0, grp_5tab, 0, 0, 0, grp_9tab};
- unsigned int idx, *tab, m = scale[x1];
-
- idx = (unsigned int) mpg123_getbits(k);
- tab = (unsigned int *) (table[d1] + idx + idx + idx);
- fraction[j][0][i] = mpg123_muls[*tab++][m];
- fraction[j][1][i] = mpg123_muls[*tab++][m];
- fraction[j][2][i] = mpg123_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;
- bita++; /* channel 1 and channel 2 bitalloc are the same */
- if ((ba = *bita++))
- {
- k = (alloc2 = alloc1 + ba)->bits;
- if ((d1 = alloc2->d) < 0)
- {
- real cm;
-
- cm = mpg123_muls[k][scale[x1 + 3]];
- fraction[1][0][i] = (fraction[0][0][i] = (real) ((int) mpg123_getbits(k) + d1)) * cm;
- fraction[1][1][i] = (fraction[0][1][i] = (real) ((int) mpg123_getbits(k) + d1)) * cm;
- fraction[1][2][i] = (fraction[0][2][i] = (real) ((int) mpg123_getbits(k) + d1)) * cm;
- cm = mpg123_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, grp_3tab, 0, grp_5tab, 0, 0, 0, grp_9tab};
- unsigned int idx, *tab, m1, m2;
-
- m1 = scale[x1];
- m2 = scale[x1 + 3];
- idx = (unsigned int) mpg123_getbits(k);
- tab = (unsigned int *) (table[d1] + idx + idx + idx);
- fraction[0][0][i] = mpg123_muls[*tab][m1];
- fraction[1][0][i] = mpg123_muls[*tab++][m2];
- fraction[0][1][i] = mpg123_muls[*tab][m1];
- fraction[1][1][i] = mpg123_muls[*tab++][m2];
- fraction[0][2][i] = mpg123_muls[*tab][m1];
- fraction[1][2][i] = mpg123_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 > (fr->down_sample_sblimit))
- sblimit = fr->down_sample_sblimit;
-
- for (i = sblimit; i < SBLIMIT; i++)
- for (j = 0; j < stereo; j++)
- fraction[j][0][i] = fraction[j][1][i] = fraction[j][2][i] = 0.0;
-
-}
-
-static void II_select_table(struct frame *fr)
-{
- 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 (fr->lsf)
- table = 4;
- else
- table = translate[fr->sampling_frequency][2 - fr->stereo][fr->bitrate_index];
- sblim = sblims[table];
-
- fr->alloc = tables[table];
- fr->II_sblimit = sblim;
-}
-
-
-int
-mpg123_do_layer2(struct frame *fr)
-{
- int i, j;
- int stereo = fr->stereo;
- real fraction[2][4][SBLIMIT]; /* pick_table clears unused subbands */
- unsigned int bit_alloc[64];
- int scale[192];
- int single = fr->single;
-
- II_select_table(fr);
- fr->jsbound = (fr->mode == MPG_MD_JOINT_STEREO) ?
- (fr->mode_ext << 2) + 4 : fr->II_sblimit;
-
- if (stereo == 1 || single == 3)
- single = 0;
-
- II_step_one(bit_alloc, scale, fr);
-
- for (i = 0; i < SCALE_BLOCK; i++)
- {
- II_step_two(bit_alloc, fraction, scale, fr, i >> 2);
- for (j = 0; j < 3; j++)
- {
- if (single >= 0)
- {
- (fr->synth_mono) (fraction[single][j], mpg123_pcm_sample, &mpg123_pcm_point);
- }
- else
- {
- int p1 = mpg123_pcm_point;
-
- (fr->synth) (fraction[0][j], 0, mpg123_pcm_sample, &p1);
- (fr->synth) (fraction[1][j], 1, mpg123_pcm_sample, &mpg123_pcm_point);
- }
-
- /* if(mpg123_pcm_point >= audiobufsize)
- audio_flush(outmode,ai); */
- }
- }
-
- if (mpg123_info->output_audio) {
-
- //mpg123_ip.add_vis_pcm(mpg123_ip.output->written_time(), mpg123_cfg.resolution == 16 ? FMT_S16_NE : FMT_U8,
- // mpg123_cfg.channels == 2 ? fr->stereo : 1, mpg123_pcm_point, mpg123_pcm_sample);
- while (esdout_free () < mpg123_pcm_point && mpg123_info->going && mpg123_info->jump_to_time == -1) {
- usleep(10000);
- }
-
- if (mpg123_info->going && mpg123_info->jump_to_time == -1) {
- esdout_write (mpg123_pcm_sample, mpg123_pcm_point);
- }
- }
- mpg123_pcm_point = 0;
-
- return 1;
-}
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