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authormarkster <markster@f38db490-d61c-443f-a65b-d21fe96a405b>2003-11-04 02:40:09 +0000
committermarkster <markster@f38db490-d61c-443f-a65b-d21fe96a405b>2003-11-04 02:40:09 +0000
commitf8c39a08f6ff651221ff896f8a174abf635f3a0a (patch)
treeac950750c9c1b65bb563df9c6506858c7f8f30c1 /codecs/mp3/src/iupL1.c
parentad46ab972ccf439d1dd3a533335b54089c53e431 (diff)
Remove really broke MP3 stuff in favor of G.726 in the near future
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@1689 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to 'codecs/mp3/src/iupL1.c')
-rwxr-xr-xcodecs/mp3/src/iupL1.c330
1 files changed, 0 insertions, 330 deletions
diff --git a/codecs/mp3/src/iupL1.c b/codecs/mp3/src/iupL1.c
deleted file mode 100755
index 041c2a00b..000000000
--- a/codecs/mp3/src/iupL1.c
+++ /dev/null
@@ -1,330 +0,0 @@
-/*____________________________________________________________________________
-
- FreeAmp - The Free MP3 Player
-
- MP3 Decoder originally Copyright (C) 1995-1997 Xing Technology
- Corp. http://www.xingtech.com
-
- Portions Copyright (C) 1998-1999 EMusic.com
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id$
-____________________________________________________________________________*/
-
-/**** iupL1.c ***************************************************
-
-MPEG audio decoder Layer I mpeg1 and mpeg2
-should be portable ANSI C, should be endian independent
-
-icupL1 integer version of cupL1.c
-
-******************************************************************/
-/*======================================================================*/
-/* Read Only */
-static int bat_bit_masterL1[] =
-{
- 0, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
-
-/*======================================================================*/
-static void unpack_baL1(MPEGI *m)
-{
- int k;
- int nstereo;
- int n;
-
- m->iup.bit_skip = 0;
- nstereo = m->iup.stereo_sb;
- for (k = 0; k < m->iup.nbatL1; k++)
- {
- mac_load_check(4);
- n = m->iup.ballo[k] = m->iup.samp_dispatch[k] = mac_load(4);
- if (k >= m->iup.nsb_limit)
- m->iup.bit_skip += bat_bit_masterL1[m->iup.samp_dispatch[k]];
- m->iup.c_value[k] = m->iup.look_c_valueL1[n];
- m->iup.c_shift[k] = m->iup.look_c_shiftL1[n];
- if (--nstereo < 0)
- {
- m->iup.ballo[k + 1] = m->iup.ballo[k];
- m->iup.samp_dispatch[k] += 15; /* flag as joint */
- m->iup.samp_dispatch[k + 1] = m->iup.samp_dispatch[k]; /* flag for sf */
- m->iup.c_value[k + 1] = m->iup.c_value[k];
- m->iup.c_shift[k + 1] = m->iup.c_shift[k];
- k++;
- }
- }
- m->iup.samp_dispatch[m->iup.nsb_limit] = 31; /* terminate the dispatcher with skip */
- m->iup.samp_dispatch[k] = 30; /* terminate the dispatcher */
-
-}
-/*-------------------------------------------------------------------------*/
-static void unpack_sfL1(MPEGI *m) /* unpack scale factor */
-{ /* combine dequant and scale factors */
- int i, n;
- INT32 tmp; /* only reason tmp is 32 bit is to get 32 bit mult result */
-
- for (i = 0; i < m->iup.nbatL1; i++)
- {
- if (m->iup.ballo[i])
- {
- mac_load_check(6);
- tmp = m->iup.c_value[i];
- n = m->iup.c_shift[i];
- m->iup.cs_factorL1[i] = (tmp * m->iup.sf_table[mac_load(6)]) >> n;
- }
- }
-
-/*-- done --*/
-}
-/*-------------------------------------------------------------------------*/
-#define UNPACKL1_N(n) s[k] = (m->iup.cs_factorL1[k]*(load(m,n)-((1 << (n-1)) -1)))>>(n-1); \
- goto dispatch;
-#define UNPACKL1J_N(n) tmp = (load(m,n)-((1 << (n-1)) -1)); \
- s[k] = (m->iup.cs_factorL1[k]*tmp)>>(n-1); \
- s[k+1] = (m->iup.cs_factorL1[k+1]*tmp)>>(n-1); \
- k++; /* skip right chan dispatch */ \
- goto dispatch;
-/*-------------------------------------------------------------------------*/
-static void unpack_sampL1(MPEGI *m) /* unpack samples */
-{
- int j, k;
- SAMPLEINT *s;
- INT32 tmp;
-
- s = m->iup.sample;
- for (j = 0; j < 12; j++)
- {
- k = -1;
- dispatch:switch (m->iup.samp_dispatch[++k])
- {
- case 0:
- s[k] = 0;
- goto dispatch;
- case 1:
- UNPACKL1_N(2) /* 3 levels */
- case 2:
- UNPACKL1_N(3) /* 7 levels */
- case 3:
- UNPACKL1_N(4) /* 15 levels */
- case 4:
- UNPACKL1_N(5) /* 31 levels */
- case 5:
- UNPACKL1_N(6) /* 63 levels */
- case 6:
- UNPACKL1_N(7) /* 127 levels */
- case 7:
- UNPACKL1_N(8) /* 255 levels */
- case 8:
- UNPACKL1_N(9) /* 511 levels */
- case 9:
- UNPACKL1_N(10) /* 1023 levels */
- case 10:
- UNPACKL1_N(11) /* 2047 levels */
- case 11:
- UNPACKL1_N(12) /* 4095 levels */
- case 12:
- UNPACKL1_N(13) /* 8191 levels */
- case 13:
- UNPACKL1_N(14) /* 16383 levels */
- case 14:
- UNPACKL1_N(15) /* 32767 levels */
-/* -- joint ---- */
- case 15 + 0:
- s[k + 1] = s[k] = 0;
- k++; /* skip right chan dispatch */
- goto dispatch;
-/* -- joint ---- */
- case 15 + 1:
- UNPACKL1J_N(2) /* 3 levels */
- case 15 + 2:
- UNPACKL1J_N(3) /* 7 levels */
- case 15 + 3:
- UNPACKL1J_N(4) /* 15 levels */
- case 15 + 4:
- UNPACKL1J_N(5) /* 31 levels */
- case 15 + 5:
- UNPACKL1J_N(6) /* 63 levels */
- case 15 + 6:
- UNPACKL1J_N(7) /* 127 levels */
- case 15 + 7:
- UNPACKL1J_N(8) /* 255 levels */
- case 15 + 8:
- UNPACKL1J_N(9) /* 511 levels */
- case 15 + 9:
- UNPACKL1J_N(10) /* 1023 levels */
- case 15 + 10:
- UNPACKL1J_N(11) /* 2047 levels */
- case 15 + 11:
- UNPACKL1J_N(12) /* 4095 levels */
- case 15 + 12:
- UNPACKL1J_N(13) /* 8191 levels */
- case 15 + 13:
- UNPACKL1J_N(14) /* 16383 levels */
- case 15 + 14:
- UNPACKL1J_N(15) /* 32767 levels */
-
-/* -- end of dispatch -- */
- case 31:
- skip(m, m->iup.bit_skip);
- case 30:
- s += 64;
- } /* end switch */
- } /* end j loop */
-
-/*-- done --*/
-}
-/*-------------------------------------------------------------------------*/
-static void unpackL1(MPEGI *m)
-{
- int prot;
-
-/* at entry bit getter points at id, sync skipped by caller */
-
- load(m,3); /* skip id and option (checked by init) */
- prot = load(m,1); /* load prot bit */
- load(m,6); /* skip to pad */
- m->iup.pad = load(m,1) << 2;
- load(m,1); /* skip to mode */
- m->iup.stereo_sb = look_joint[load(m,4)];
- if (prot)
- load(m,4); /* skip to data */
- else
- load(m,20); /* skip crc */
-
- unpack_baL1(m); /* unpack bit allocation */
- unpack_sfL1(m); /* unpack scale factor */
- unpack_sampL1(m); /* unpack samples */
-
-
-}
-/*-------------------------------------------------------------------------*/
-
-#ifdef _MSC_VER
-#pragma warning(disable: 4056)
-#endif
-
-int i_audio_decode_initL1(MPEGI *m, MPEG_HEAD * h, int framebytes_arg,
- int reduction_code, int transform_code, int convert_code,
- int freq_limit)
-{
- int i, k;
- long samprate;
- int limit;
- int stepbit;
- long step;
- int bit_code;
-
-/*--- sf table built by Layer II init ---*/
-
- if (m->iup.first_pass_L1)
- {
- stepbit = 2;
- step = 4;
- for (i = 1; i < 16; i++)
- {
- m->iup.look_c_valueL1[i] = (int) (32768.0 * 2.0 / (step - 1));
- m->iup.look_c_shiftL1[i] = 16 - stepbit;
- stepbit++;
- step <<= 1;
- }
- m->iup.first_pass_L1 = 0;
- }
-
- m->iup.unpack_routine = unpackL1;
-
-
- transform_code = transform_code; /* not used, asm compatability */
- bit_code = 0;
- if (convert_code & 8)
- bit_code = 1;
- convert_code = convert_code & 3; /* higher bits used by dec8 freq cvt */
- if (reduction_code < 0)
- reduction_code = 0;
- if (reduction_code > 2)
- reduction_code = 2;
- if (freq_limit < 1000)
- freq_limit = 1000;
-
-
- m->iup.framebytes = framebytes_arg;
-/* check if code handles */
- if (h->option != 3)
- return 0; /* layer I only */
-
- m->iup.nbatL1 = 32;
- m->iup.max_sb = m->iup.nbatL1;
-/*----- compute nsb_limit --------*/
- samprate = sr_table[4 * h->id + h->sr_index];
- m->iup.nsb_limit = (freq_limit * 64L + samprate / 2) / samprate;
-/*- caller limit -*/
-/*---- limit = 0.94*(32>>reduction_code); ----*/
- limit = (32 >> reduction_code);
- if (limit > 8)
- limit--;
- if (m->iup.nsb_limit > limit)
- m->iup.nsb_limit = limit;
- if (m->iup.nsb_limit > m->iup.max_sb)
- m->iup.nsb_limit = m->iup.max_sb;
-
- m->iup.outvalues = 384 >> reduction_code;
- if (h->mode != 3)
- { /* adjust for 2 channel modes */
- m->iup.nbatL1 *= 2;
- m->iup.max_sb *= 2;
- m->iup.nsb_limit *= 2;
- }
-
-/* set sbt function */
- m->iup.nsbt = 12;
- k = 1 + convert_code;
- if (h->mode == 3)
- {
- k = 0;
- }
- m->iup.sbt = sbt_table[bit_code][reduction_code][k];
- m->iup.outvalues *= out_chans[k];
- if (bit_code != 0)
- m->iup.outbytes = m->iup.outvalues;
- else
- m->iup.outbytes = sizeof(short) * m->iup.outvalues;
-
- m->iup.decinfo.channels = out_chans[k];
- m->iup.decinfo.outvalues = m->iup.outvalues;
- m->iup.decinfo.samprate = samprate >> reduction_code;
- if (bit_code != 0)
- m->iup.decinfo.bits = 8;
- else
- m->iup.decinfo.bits = sizeof(short) * 8;
-
- m->iup.decinfo.framebytes = m->iup.framebytes;
- m->iup.decinfo.type = 0;
-
-
-/* clear sample buffer, unused sub bands must be 0 */
- for (i = 0; i < 768; i++)
- m->iup.sample[i] = 0;
-
-
-/* init sub-band transform */
- i_sbt_init();
-
- return 1;
-}
-
-#ifdef _MSC_VER
-#pragma warning(default: 4056)
-#endif
-
-/*---------------------------------------------------------*/