/*****************************************************************************
* ac3_parse.c: ac3 parsing procedures
*****************************************************************************
- * Copyright (C) 1999, 2000 VideoLAN
+ * Copyright (C) 1999, 2000, 2001 VideoLAN
+ * $Id: ac3_parse.c,v 1.24 2001/08/22 17:21:45 massiot Exp $
*
- * Authors:
+ * Authors: Michel Kaempf <maxx@via.ecp.fr>
+ * Aaron Holtzman <aholtzma@engr.uvic.ca>
+ * Renaud Dartus <reno@videolan.org>
*
* 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.
+ * 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., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
*****************************************************************************/
+#include "defs.h"
+
+#include <string.h> /* memset() */
+
+#include "config.h"
+#include "common.h"
+
+#include "threads.h"
+#include "mtime.h"
+
+#include "intf_msg.h"
-#include "int_types.h"
+#include "stream_control.h"
+#include "input_ext-dec.h"
+
+#include "audio_output.h"
+
+#include "ac3_imdct.h"
+#include "ac3_downmix.h"
#include "ac3_decoder.h"
-#include "ac3_internal.h"
-#include "ac3_bit_stream.h"
+#include "ac3_decoder_thread.h" /* ac3dec_thread_t */
+
+#include "ac3_internal.h" /* EXP_REUSE */
/* Misc LUT */
-static u16 nfchans[] = { 2, 1, 2, 3, 3, 4, 4, 5 };
+static const u16 nfchans[] = { 2, 1, 2, 3, 3, 4, 4, 5 };
-struct frmsize_s {
+struct frmsize_s
+{
u16 bit_rate;
u16 frm_size[3];
};
-static struct frmsize_s frmsizecod_tbl[] = {
+static const struct frmsize_s frmsizecod_tbl[] =
+{
{ 32 ,{64 ,69 ,96 } },
{ 32 ,{64 ,70 ,96 } },
{ 40 ,{80 ,87 ,120 } },
{ 640 ,{1280 ,1393 ,1920 } },
{ 640 ,{1280 ,1394 ,1920 } }};
-static int fscod_tbl[] = {48000, 44100, 32000};
+static const int fscod_tbl[] = {48000, 44100, 32000};
+
+/* Some internal functions */
+#ifdef TRACE
+static void parse_bsi_stats (ac3dec_t * p_ac3dec);
+static void parse_audblk_stats (ac3dec_t * p_ac3dec);
+#endif
/* Parse a syncinfo structure */
int ac3_sync_frame (ac3dec_t * p_ac3dec, ac3_sync_info_t * p_sync_info)
{
- int buf;
-
- p_ac3dec->bit_stream.total_bits_read = 0;
- p_ac3dec->bit_stream.i_available = 0;
-
+ ac3dec_thread_t * p_ac3dec_t = (ac3dec_thread_t *) p_ac3dec->bit_stream.p_callback_arg;
+
+ p_ac3dec->total_bits_read = 0;
+ p_ac3dec->i_available = 0;
+
/* sync word - should be 0x0b77 */
- NeedBits (&(p_ac3dec->bit_stream), 16);
- buf = p_ac3dec->bit_stream.buffer >> (32 - 16);
- DumpBits (&(p_ac3dec->bit_stream), 16);
- if (buf != 0x0b77)
- return 1;
+ RealignBits(&p_ac3dec->bit_stream);
+ while( (ShowBits (&p_ac3dec->bit_stream,16)) != 0x0b77 &&
+ (!p_ac3dec_t->p_fifo->b_die) && (!p_ac3dec_t->p_fifo->b_error))
+ {
+ RemoveBits (&p_ac3dec->bit_stream,8);
+ p_ac3dec->total_bits_read += 8;
+ }
+ RemoveBits (&p_ac3dec->bit_stream,16);
+ p_ac3dec->total_bits_read += 16;
+
/* Get crc1 - we don't actually use this data though */
- NeedBits (&(p_ac3dec->bit_stream), 16);
- DumpBits (&(p_ac3dec->bit_stream), 16);
+ GetBits (&p_ac3dec->bit_stream,16);
/* Get the sampling rate */
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->syncinfo.fscod = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
+ p_ac3dec->syncinfo.fscod = GetBits (&p_ac3dec->bit_stream,2);
if (p_ac3dec->syncinfo.fscod >= 3)
- return 1;
+ {
+ p_ac3dec->total_bits_read += 34;
+ return 1;
+ }
/* Get the frame size code */
- NeedBits (&(p_ac3dec->bit_stream), 6);
- p_ac3dec->syncinfo.frmsizecod = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 6));
- DumpBits (&(p_ac3dec->bit_stream), 6);
+ p_ac3dec->syncinfo.frmsizecod = GetBits (&p_ac3dec->bit_stream,6);
+ p_ac3dec->total_bits_read += 40;
if (p_ac3dec->syncinfo.frmsizecod >= 38)
- return 1;
+ {
+ return 1;
+ }
p_sync_info->bit_rate = frmsizecod_tbl[p_ac3dec->syncinfo.frmsizecod].bit_rate;
*/
int parse_bsi (ac3dec_t * p_ac3dec)
{
- u32 i;
-
/* Check the AC-3 version number */
- NeedBits (&(p_ac3dec->bit_stream), 5);
- p_ac3dec->bsi.bsid = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 5));
- DumpBits (&(p_ac3dec->bit_stream), 5);
+ p_ac3dec->bsi.bsid = GetBits (&p_ac3dec->bit_stream,5);
if (p_ac3dec->bsi.bsid > 8)
- return 1;
+ {
+ return 1;
+ }
- /* Get the audio service provided by the steram */
- NeedBits (&(p_ac3dec->bit_stream), 3);
- p_ac3dec->bsi.bsmod = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 3));
- DumpBits (&(p_ac3dec->bit_stream), 3);
+ /* Get the audio service provided by the stream */
+ p_ac3dec->bsi.bsmod = GetBits (&p_ac3dec->bit_stream,3);
/* Get the audio coding mode (ie how many channels)*/
- NeedBits (&(p_ac3dec->bit_stream), 3);
- p_ac3dec->bsi.acmod = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 3));
- DumpBits (&(p_ac3dec->bit_stream), 3);
+ p_ac3dec->bsi.acmod = GetBits (&p_ac3dec->bit_stream,3);
+
/* Predecode the number of full bandwidth channels as we use this
* number a lot */
p_ac3dec->bsi.nfchans = nfchans[p_ac3dec->bsi.acmod];
/* If it is in use, get the centre channel mix level */
- if ((p_ac3dec->bsi.acmod & 0x1) && (p_ac3dec->bsi.acmod != 0x1)) {
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->bsi.cmixlev = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
+ if ((p_ac3dec->bsi.acmod & 0x1) && (p_ac3dec->bsi.acmod != 0x1))
+ {
+ p_ac3dec->bsi.cmixlev = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->total_bits_read += 2;
}
/* If it is in use, get the surround channel mix level */
- if (p_ac3dec->bsi.acmod & 0x4) {
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->bsi.surmixlev = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
+ if (p_ac3dec->bsi.acmod & 0x4)
+ {
+ p_ac3dec->bsi.surmixlev = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->total_bits_read += 2;
}
/* Get the dolby surround mode if in 2/0 mode */
- if (p_ac3dec->bsi.acmod == 0x2) {
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->bsi.dsurmod = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
+ if (p_ac3dec->bsi.acmod == 0x2)
+ {
+ p_ac3dec->bsi.dsurmod = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->total_bits_read += 2;
}
/* Is the low frequency effects channel on? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->bsi.lfeon = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ p_ac3dec->bsi.lfeon = GetBits (&p_ac3dec->bit_stream,1);
/* Get the dialogue normalization level */
- NeedBits (&(p_ac3dec->bit_stream), 5);
- p_ac3dec->bsi.dialnorm = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 5));
- DumpBits (&(p_ac3dec->bit_stream), 5);
+ p_ac3dec->bsi.dialnorm = GetBits (&p_ac3dec->bit_stream,5);
/* Does compression gain exist? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->bsi.compre = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
- if (p_ac3dec->bsi.compre) {
+ if ((p_ac3dec->bsi.compre = GetBits (&p_ac3dec->bit_stream,1)))
+ {
/* Get compression gain */
- NeedBits (&(p_ac3dec->bit_stream), 8);
- p_ac3dec->bsi.compr = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 8));
- DumpBits (&(p_ac3dec->bit_stream), 8);
+ p_ac3dec->bsi.compr = GetBits (&p_ac3dec->bit_stream,8);
+ p_ac3dec->total_bits_read += 8;
}
/* Does language code exist? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->bsi.langcode = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
- if (p_ac3dec->bsi.langcode) {
+ if ((p_ac3dec->bsi.langcode = GetBits (&p_ac3dec->bit_stream,1)))
+ {
/* Get langauge code */
- NeedBits (&(p_ac3dec->bit_stream), 8);
- p_ac3dec->bsi.langcod = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 8));
- DumpBits (&(p_ac3dec->bit_stream), 8);
+ p_ac3dec->bsi.langcod = GetBits (&p_ac3dec->bit_stream,8);
+ p_ac3dec->total_bits_read += 8;
}
/* Does audio production info exist? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->bsi.audprodie = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
- if (p_ac3dec->bsi.audprodie) {
+ if ((p_ac3dec->bsi.audprodie = GetBits (&p_ac3dec->bit_stream,1)))
+ {
/* Get mix level */
- NeedBits (&(p_ac3dec->bit_stream), 5);
- p_ac3dec->bsi.mixlevel = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 5));
- DumpBits (&(p_ac3dec->bit_stream), 5);
+ p_ac3dec->bsi.mixlevel = GetBits (&p_ac3dec->bit_stream,5);
/* Get room type */
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->bsi.roomtyp = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
+ p_ac3dec->bsi.roomtyp = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->total_bits_read += 7;
}
/* If we're in dual mono mode then get some extra info */
- if (p_ac3dec->bsi.acmod ==0) {
+ if (p_ac3dec->bsi.acmod == 0)
+ {
/* Get the dialogue normalization level two */
- NeedBits (&(p_ac3dec->bit_stream), 5);
- p_ac3dec->bsi.dialnorm2 = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 5));
- DumpBits (&(p_ac3dec->bit_stream), 5);
+ p_ac3dec->bsi.dialnorm2 = GetBits (&p_ac3dec->bit_stream,5);
/* Does compression gain two exist? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->bsi.compr2e = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
- if (p_ac3dec->bsi.compr2e) {
+ if ((p_ac3dec->bsi.compr2e = GetBits (&p_ac3dec->bit_stream,1)))
+ {
/* Get compression gain two */
- NeedBits (&(p_ac3dec->bit_stream), 8);
- p_ac3dec->bsi.compr2 = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 8));
- DumpBits (&(p_ac3dec->bit_stream), 8);
+ p_ac3dec->bsi.compr2 = GetBits (&p_ac3dec->bit_stream,8);
+ p_ac3dec->total_bits_read += 8;
}
/* Does language code two exist? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->bsi.langcod2e = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
- if (p_ac3dec->bsi.langcod2e) {
+ if ((p_ac3dec->bsi.langcod2e = GetBits (&p_ac3dec->bit_stream,1)))
+ {
/* Get langauge code two */
- NeedBits (&(p_ac3dec->bit_stream), 8);
- p_ac3dec->bsi.langcod2 = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 8));
- DumpBits (&(p_ac3dec->bit_stream), 8);
+ p_ac3dec->bsi.langcod2 = GetBits (&p_ac3dec->bit_stream,8);
+ p_ac3dec->total_bits_read += 8;
}
/* Does audio production info two exist? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->bsi.audprodi2e = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
- if (p_ac3dec->bsi.audprodi2e) {
+ if ((p_ac3dec->bsi.audprodi2e = GetBits (&p_ac3dec->bit_stream,1)))
+ {
/* Get mix level two */
- NeedBits (&(p_ac3dec->bit_stream), 5);
- p_ac3dec->bsi.mixlevel2 = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 5));
- DumpBits (&(p_ac3dec->bit_stream), 5);
+ p_ac3dec->bsi.mixlevel2 = GetBits (&p_ac3dec->bit_stream,5);
/* Get room type two */
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->bsi.roomtyp2 = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
+ p_ac3dec->bsi.roomtyp2 = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->total_bits_read += 7;
}
+ p_ac3dec->total_bits_read += 8;
}
/* Get the copyright bit */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->bsi.copyrightb = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ p_ac3dec->bsi.copyrightb = GetBits (&p_ac3dec->bit_stream,1);
/* Get the original bit */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->bsi.origbs = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ p_ac3dec->bsi.origbs = GetBits (&p_ac3dec->bit_stream,1);
/* Does timecode one exist? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->bsi.timecod1e = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
-
- if (p_ac3dec->bsi.timecod1e) {
- NeedBits (&(p_ac3dec->bit_stream), 14);
- p_ac3dec->bsi.timecod1 = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 14));
- DumpBits (&(p_ac3dec->bit_stream), 14);
+ if ((p_ac3dec->bsi.timecod1e = GetBits (&p_ac3dec->bit_stream,1)))
+ {
+ p_ac3dec->bsi.timecod1 = GetBits (&p_ac3dec->bit_stream,14);
+ p_ac3dec->total_bits_read += 14;
}
/* Does timecode two exist? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->bsi.timecod2e = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
-
- if (p_ac3dec->bsi.timecod2e) {
- NeedBits (&(p_ac3dec->bit_stream), 14);
- p_ac3dec->bsi.timecod2 = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 14));
- DumpBits (&(p_ac3dec->bit_stream), 14);
+ if ((p_ac3dec->bsi.timecod2e = GetBits (&p_ac3dec->bit_stream,1)))
+ {
+ p_ac3dec->bsi.timecod2 = GetBits (&p_ac3dec->bit_stream,14);
+ p_ac3dec->total_bits_read += 14;
}
/* Does addition info exist? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->bsi.addbsie = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ if ((p_ac3dec->bsi.addbsie = GetBits (&p_ac3dec->bit_stream,1)))
+ {
+ u32 i;
- if (p_ac3dec->bsi.addbsie) {
/* Get how much info is there */
- NeedBits (&(p_ac3dec->bit_stream), 6);
- p_ac3dec->bsi.addbsil = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 6));
- DumpBits (&(p_ac3dec->bit_stream), 6);
+ p_ac3dec->bsi.addbsil = GetBits (&p_ac3dec->bit_stream,6);
/* Get the additional info */
- for (i=0;i<(p_ac3dec->bsi.addbsil + 1);i++) {
- NeedBits (&(p_ac3dec->bit_stream), 8);
- p_ac3dec->bsi.addbsi[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 8));
- DumpBits (&(p_ac3dec->bit_stream), 8);
+ for (i=0;i<(p_ac3dec->bsi.addbsil + 1);i++)
+ {
+ p_ac3dec->bsi.addbsi[i] = GetBits (&p_ac3dec->bit_stream,8);
}
+ p_ac3dec->total_bits_read += 6 + 8 * (p_ac3dec->bsi.addbsil + 1);
}
+ p_ac3dec->total_bits_read += 25;
+
+#ifdef TRACE
+ parse_bsi_stats (p_ac3dec);
+#endif
return 0;
}
{
int i, j;
- for (i=0; i < p_ac3dec->bsi.nfchans; i++) {
+ for (i=0; i < p_ac3dec->bsi.nfchans; i++)
+ {
/* Is this channel an interleaved 256 + 256 block ? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.blksw[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ p_ac3dec->audblk.blksw[i] = GetBits (&p_ac3dec->bit_stream,1);
}
- for (i=0; i < p_ac3dec->bsi.nfchans; i++) {
+ for (i=0; i < p_ac3dec->bsi.nfchans; i++)
+ {
/* Should we dither this channel? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.dithflag[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ p_ac3dec->audblk.dithflag[i] = GetBits (&p_ac3dec->bit_stream,1);
}
/* Does dynamic range control exist? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.dynrnge = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
- if (p_ac3dec->audblk.dynrnge) {
+ if ((p_ac3dec->audblk.dynrnge = GetBits (&p_ac3dec->bit_stream,1)))
+ {
/* Get dynamic range info */
- NeedBits (&(p_ac3dec->bit_stream), 8);
- p_ac3dec->audblk.dynrng = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 8));
- DumpBits (&(p_ac3dec->bit_stream), 8);
+ p_ac3dec->audblk.dynrng = GetBits (&p_ac3dec->bit_stream,8);
+ p_ac3dec->total_bits_read += 8;
}
/* If we're in dual mono mode then get the second channel DR info */
- if (p_ac3dec->bsi.acmod == 0) {
+ if (p_ac3dec->bsi.acmod == 0)
+ {
/* Does dynamic range control two exist? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.dynrng2e = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
- if (p_ac3dec->audblk.dynrng2e) {
+ if ((p_ac3dec->audblk.dynrng2e = GetBits (&p_ac3dec->bit_stream,1)))
+ {
/* Get dynamic range info */
- NeedBits (&(p_ac3dec->bit_stream), 8);
- p_ac3dec->audblk.dynrng2 = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 8));
- DumpBits (&(p_ac3dec->bit_stream), 8);
+ p_ac3dec->audblk.dynrng2 = GetBits (&p_ac3dec->bit_stream,8);
+ p_ac3dec->total_bits_read += 8;
}
+ p_ac3dec->total_bits_read += 1;
}
/* Does coupling strategy exist? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.cplstre = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ p_ac3dec->audblk.cplstre = GetBits (&p_ac3dec->bit_stream,1);
+ p_ac3dec->total_bits_read += 2 + 2 * p_ac3dec->bsi.nfchans;
if ((!blknum) && (!p_ac3dec->audblk.cplstre))
- return 1;
+ {
+ return 1;
+ }
- if (p_ac3dec->audblk.cplstre) {
+ if (p_ac3dec->audblk.cplstre)
+ {
/* Is coupling turned on? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.cplinu = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
- if (p_ac3dec->audblk.cplinu) {
- int nb_coupled_channels;
-
- nb_coupled_channels = 0;
- for (i=0; i < p_ac3dec->bsi.nfchans; i++) {
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.chincpl[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
- if (p_ac3dec->audblk.chincpl[i])
- nb_coupled_channels++;
+ if ((p_ac3dec->audblk.cplinu = GetBits (&p_ac3dec->bit_stream,1)))
+ {
+ int nb_coupled_channels;
+
+ nb_coupled_channels = 0;
+ for (i=0; i < p_ac3dec->bsi.nfchans; i++)
+ {
+ p_ac3dec->audblk.chincpl[i] = GetBits (&p_ac3dec->bit_stream,1);
+ if (p_ac3dec->audblk.chincpl[i])
+ {
+ nb_coupled_channels++;
+ }
+ }
+ p_ac3dec->total_bits_read += p_ac3dec->bsi.nfchans;
+
+ if (nb_coupled_channels < 2)
+ {
+ return 1;
}
- if (nb_coupled_channels < 2)
- return 1;
- if (p_ac3dec->bsi.acmod == 0x2) {
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.phsflginu = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ if (p_ac3dec->bsi.acmod == 0x2)
+ {
+ p_ac3dec->audblk.phsflginu = GetBits (&p_ac3dec->bit_stream,1);
+ p_ac3dec->total_bits_read += 1;
}
- NeedBits (&(p_ac3dec->bit_stream), 4);
- p_ac3dec->audblk.cplbegf = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 4));
- DumpBits (&(p_ac3dec->bit_stream), 4);
- NeedBits (&(p_ac3dec->bit_stream), 4);
- p_ac3dec->audblk.cplendf = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 4));
- DumpBits (&(p_ac3dec->bit_stream), 4);
+ p_ac3dec->audblk.cplbegf = GetBits (&p_ac3dec->bit_stream,4);
+ p_ac3dec->audblk.cplendf = GetBits (&p_ac3dec->bit_stream,4);
+ p_ac3dec->total_bits_read += 8;
- if (p_ac3dec->audblk.cplbegf > p_ac3dec->audblk.cplendf + 2)
- return 1;
+ if (p_ac3dec->audblk.cplbegf > p_ac3dec->audblk.cplendf + 2)
+ {
+ return 1;
+ }
p_ac3dec->audblk.ncplsubnd = (p_ac3dec->audblk.cplendf + 2) - p_ac3dec->audblk.cplbegf + 1;
* band */
p_ac3dec->audblk.ncplbnd = p_ac3dec->audblk.ncplsubnd;
- for (i=1; i< p_ac3dec->audblk.ncplsubnd; i++) {
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.cplbndstrc[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ for (i=1; i< p_ac3dec->audblk.ncplsubnd; i++)
+ {
+ p_ac3dec->audblk.cplbndstrc[i] = GetBits (&p_ac3dec->bit_stream,1);
p_ac3dec->audblk.ncplbnd -= p_ac3dec->audblk.cplbndstrc[i];
}
+ p_ac3dec->total_bits_read += p_ac3dec->audblk.ncplsubnd - 1;
}
+ p_ac3dec->total_bits_read += 1;
}
- if (p_ac3dec->audblk.cplinu) {
+ if (p_ac3dec->audblk.cplinu)
+ {
/* Loop through all the channels and get their coupling co-ords */
- for (i=0; i < p_ac3dec->bsi.nfchans;i++) {
+ for (i=0; i < p_ac3dec->bsi.nfchans;i++)
+ {
if (!p_ac3dec->audblk.chincpl[i])
+ {
continue;
+ }
/* Is there new coupling co-ordinate info? */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.cplcoe[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
-
- if ((!blknum) && (!p_ac3dec->audblk.cplcoe[i]))
- return 1;
-
- if (p_ac3dec->audblk.cplcoe[i]) {
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->audblk.mstrcplco[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
- for (j=0;j < p_ac3dec->audblk.ncplbnd; j++) {
- NeedBits (&(p_ac3dec->bit_stream), 4);
- p_ac3dec->audblk.cplcoexp[i][j] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 4));
- DumpBits (&(p_ac3dec->bit_stream), 4);
- NeedBits (&(p_ac3dec->bit_stream), 4);
- p_ac3dec->audblk.cplcomant[i][j] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 4));
- DumpBits (&(p_ac3dec->bit_stream), 4);
+ p_ac3dec->audblk.cplcoe[i] = GetBits (&p_ac3dec->bit_stream,1);
+
+ if ((!blknum) && (!p_ac3dec->audblk.cplcoe[i]))
+ {
+ return 1;
+ }
+
+ if (p_ac3dec->audblk.cplcoe[i])
+ {
+ p_ac3dec->audblk.mstrcplco[i] = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->total_bits_read += 2;
+ for (j=0;j < p_ac3dec->audblk.ncplbnd; j++)
+ {
+ p_ac3dec->audblk.cplcoexp[i][j] = GetBits (&p_ac3dec->bit_stream,4);
+ p_ac3dec->audblk.cplcomant[i][j] = GetBits (&p_ac3dec->bit_stream,4);
}
+ p_ac3dec->total_bits_read += 8 * p_ac3dec->audblk.ncplbnd;
}
}
+ p_ac3dec->total_bits_read += p_ac3dec->bsi.nfchans;
/* If we're in dual mono mode, there's going to be some phase info */
if ((p_ac3dec->bsi.acmod == 0x2) && p_ac3dec->audblk.phsflginu &&
- (p_ac3dec->audblk.cplcoe[0] || p_ac3dec->audblk.cplcoe[1])) {
- for (j=0; j < p_ac3dec->audblk.ncplbnd; j++) {
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.phsflg[j] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ (p_ac3dec->audblk.cplcoe[0] || p_ac3dec->audblk.cplcoe[1]))
+ {
+ for (j=0; j < p_ac3dec->audblk.ncplbnd; j++)
+ {
+ p_ac3dec->audblk.phsflg[j] = GetBits (&p_ac3dec->bit_stream,1);
}
+ p_ac3dec->total_bits_read += p_ac3dec->audblk.ncplbnd;
}
}
/* If we're in dual mono mode, there may be a rematrix strategy */
- if (p_ac3dec->bsi.acmod == 0x2) {
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.rematstr = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
-
- if ((!blknum) && (!p_ac3dec->audblk.rematstr))
- return 1;
-
- if (p_ac3dec->audblk.rematstr) {
- if (p_ac3dec->audblk.cplinu == 0) {
- for (i = 0; i < 4; i++) {
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.rematflg[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ if (p_ac3dec->bsi.acmod == 0x2)
+ {
+ p_ac3dec->audblk.rematstr = GetBits (&p_ac3dec->bit_stream,1);
+ p_ac3dec->total_bits_read += 1;
+
+ if ((!blknum) && (!p_ac3dec->audblk.rematstr))
+ {
+ return 1;
+ }
+
+ if (p_ac3dec->audblk.rematstr)
+ {
+ if (p_ac3dec->audblk.cplinu == 0)
+ {
+ for (i = 0; i < 4; i++)
+ {
+ p_ac3dec->audblk.rematflg[i] = GetBits (&p_ac3dec->bit_stream,1);
}
+ p_ac3dec->total_bits_read += 4;
}
- if ((p_ac3dec->audblk.cplbegf > 2) && p_ac3dec->audblk.cplinu) {
- for (i = 0; i < 4; i++) {
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.rematflg[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ if ((p_ac3dec->audblk.cplbegf > 2) && p_ac3dec->audblk.cplinu)
+ {
+ for (i = 0; i < 4; i++)
+ {
+ p_ac3dec->audblk.rematflg[i] = GetBits (&p_ac3dec->bit_stream,1);
}
+ p_ac3dec->total_bits_read += 4;
}
- if ((p_ac3dec->audblk.cplbegf <= 2) && p_ac3dec->audblk.cplinu) {
- for (i = 0; i < 3; i++) {
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.rematflg[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ if ((p_ac3dec->audblk.cplbegf <= 2) && p_ac3dec->audblk.cplinu)
+ {
+ for (i = 0; i < 3; i++)
+ {
+ p_ac3dec->audblk.rematflg[i] = GetBits (&p_ac3dec->bit_stream,1);
}
+ p_ac3dec->total_bits_read += 3;
}
if ((p_ac3dec->audblk.cplbegf == 0) && p_ac3dec->audblk.cplinu)
- for (i = 0; i < 2; i++) {
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.rematflg[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ {
+ for (i = 0; i < 2; i++)
+ {
+ p_ac3dec->audblk.rematflg[i] = GetBits (&p_ac3dec->bit_stream,1);
}
+ p_ac3dec->total_bits_read += 2;
+ }
}
}
if (p_ac3dec->audblk.cplinu)
{
/* Get the coupling channel exponent strategy */
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->audblk.cplexpstr = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
+ p_ac3dec->audblk.cplexpstr = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->total_bits_read += 2;
- if ((!blknum) && (p_ac3dec->audblk.cplexpstr == EXP_REUSE))
- return 1;
+ if ((!blknum) && (p_ac3dec->audblk.cplexpstr == EXP_REUSE))
+ {
+ return 1;
+ }
if (p_ac3dec->audblk.cplexpstr==0)
+ {
p_ac3dec->audblk.ncplgrps = 0;
+ }
else
+ {
p_ac3dec->audblk.ncplgrps = (p_ac3dec->audblk.cplendmant - p_ac3dec->audblk.cplstrtmant) /
- (3 << (p_ac3dec->audblk.cplexpstr-1));
+ (3 << (p_ac3dec->audblk.cplexpstr-1));
+ }
}
- for (i = 0; i < p_ac3dec->bsi.nfchans; i++) {
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->audblk.chexpstr[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
+ for (i = 0; i < p_ac3dec->bsi.nfchans; i++)
+ {
+ p_ac3dec->audblk.chexpstr[i] = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->total_bits_read += 2;
- if ((!blknum) && (p_ac3dec->audblk.chexpstr[i] == EXP_REUSE))
- return 1;
+ if ((!blknum) && (p_ac3dec->audblk.chexpstr[i] == EXP_REUSE))
+ {
+ return 1;
+ }
}
/* Get the exponent strategy for lfe channel */
- if (p_ac3dec->bsi.lfeon) {
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.lfeexpstr = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ if (p_ac3dec->bsi.lfeon)
+ {
+ p_ac3dec->audblk.lfeexpstr = GetBits (&p_ac3dec->bit_stream,1);
+ p_ac3dec->total_bits_read += 1;
- if ((!blknum) && (p_ac3dec->audblk.lfeexpstr == EXP_REUSE))
- return 1;
+ if ((!blknum) && (p_ac3dec->audblk.lfeexpstr == EXP_REUSE))
+ {
+ return 1;
+ }
}
/* Determine the bandwidths of all the fbw channels */
- for (i = 0; i < p_ac3dec->bsi.nfchans; i++) {
+ for (i = 0; i < p_ac3dec->bsi.nfchans; i++)
+ {
u16 grp_size;
- if (p_ac3dec->audblk.chexpstr[i] != EXP_REUSE) {
- if (p_ac3dec->audblk.cplinu && p_ac3dec->audblk.chincpl[i]) {
+ if (p_ac3dec->audblk.chexpstr[i] != EXP_REUSE)
+ {
+ if (p_ac3dec->audblk.cplinu && p_ac3dec->audblk.chincpl[i])
+ {
p_ac3dec->audblk.endmant[i] = p_ac3dec->audblk.cplstrtmant;
- } else {
- NeedBits (&(p_ac3dec->bit_stream), 6);
- p_ac3dec->audblk.chbwcod[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 6));
- DumpBits (&(p_ac3dec->bit_stream), 6);
-
- if (p_ac3dec->audblk.chbwcod[i] > 60)
- return 1;
+ }
+ else
+ {
+ p_ac3dec->audblk.chbwcod[i] = GetBits (&p_ac3dec->bit_stream,6);
+ p_ac3dec->total_bits_read += 6;
+
+ if (p_ac3dec->audblk.chbwcod[i] > 60)
+ {
+ return 1;
+ }
p_ac3dec->audblk.endmant[i] = ((p_ac3dec->audblk.chbwcod[i] + 12) * 3) + 37;
}
}
/* Get the coupling exponents if they exist */
- if (p_ac3dec->audblk.cplinu && (p_ac3dec->audblk.cplexpstr != EXP_REUSE)) {
- NeedBits (&(p_ac3dec->bit_stream), 4);
- p_ac3dec->audblk.cplabsexp = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 4));
- DumpBits (&(p_ac3dec->bit_stream), 4);
- for (i=0; i< p_ac3dec->audblk.ncplgrps;i++) {
- NeedBits (&(p_ac3dec->bit_stream), 7);
- p_ac3dec->audblk.cplexps[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 7));
- DumpBits (&(p_ac3dec->bit_stream), 7);
-
- if (p_ac3dec->audblk.cplexps[i] >= 125)
- return 1;
+ if (p_ac3dec->audblk.cplinu && (p_ac3dec->audblk.cplexpstr != EXP_REUSE))
+ {
+ p_ac3dec->audblk.cplabsexp = GetBits (&p_ac3dec->bit_stream,4);
+ p_ac3dec->total_bits_read += 4;
+ for (i=0; i< p_ac3dec->audblk.ncplgrps;i++)
+ {
+ p_ac3dec->audblk.cplexps[i] = GetBits (&p_ac3dec->bit_stream,7);
+ p_ac3dec->total_bits_read += 7;
+
+ if (p_ac3dec->audblk.cplexps[i] >= 125)
+ {
+ return 1;
+ }
}
}
/* Get the fwb channel exponents */
- for (i=0; i < p_ac3dec->bsi.nfchans; i++) {
- if (p_ac3dec->audblk.chexpstr[i] != EXP_REUSE) {
- NeedBits (&(p_ac3dec->bit_stream), 4);
- p_ac3dec->audblk.exps[i][0] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 4));
- DumpBits (&(p_ac3dec->bit_stream), 4);
- for (j=1; j<=p_ac3dec->audblk.nchgrps[i];j++) {
- NeedBits (&(p_ac3dec->bit_stream), 7);
- p_ac3dec->audblk.exps[i][j] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 7));
- DumpBits (&(p_ac3dec->bit_stream), 7);
- if (p_ac3dec->audblk.exps[i][j] >= 125)
- return 1;
+ for (i=0; i < p_ac3dec->bsi.nfchans; i++)
+ {
+ if (p_ac3dec->audblk.chexpstr[i] != EXP_REUSE)
+ {
+ p_ac3dec->audblk.exps[i][0] = GetBits (&p_ac3dec->bit_stream,4);
+ p_ac3dec->total_bits_read += 4;
+ for (j=1; j<=p_ac3dec->audblk.nchgrps[i];j++)
+ {
+ p_ac3dec->audblk.exps[i][j] = GetBits (&p_ac3dec->bit_stream,7);
+ p_ac3dec->total_bits_read += 7;
+ if (p_ac3dec->audblk.exps[i][j] >= 125)
+ {
+ return 1;
+ }
}
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->audblk.gainrng[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
+ p_ac3dec->audblk.gainrng[i] = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->total_bits_read += 2;
}
}
/* Get the lfe channel exponents */
- if (p_ac3dec->bsi.lfeon && (p_ac3dec->audblk.lfeexpstr != EXP_REUSE)) {
- NeedBits (&(p_ac3dec->bit_stream), 4);
- p_ac3dec->audblk.lfeexps[0] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 4));
- DumpBits (&(p_ac3dec->bit_stream), 4);
- NeedBits (&(p_ac3dec->bit_stream), 7);
- p_ac3dec->audblk.lfeexps[1] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 7));
- DumpBits (&(p_ac3dec->bit_stream), 7);
- if (p_ac3dec->audblk.lfeexps[1] >= 125)
- return 1;
- NeedBits (&(p_ac3dec->bit_stream), 7);
- p_ac3dec->audblk.lfeexps[2] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 7));
- DumpBits (&(p_ac3dec->bit_stream), 7);
- if (p_ac3dec->audblk.lfeexps[2] >= 125)
- return 1;
+ if (p_ac3dec->bsi.lfeon && (p_ac3dec->audblk.lfeexpstr != EXP_REUSE))
+ {
+ p_ac3dec->audblk.lfeexps[0] = GetBits (&p_ac3dec->bit_stream,4);
+ p_ac3dec->audblk.lfeexps[1] = GetBits (&p_ac3dec->bit_stream,7);
+ p_ac3dec->total_bits_read += 11;
+ if (p_ac3dec->audblk.lfeexps[1] >= 125)
+ {
+ return 1;
+ }
+ p_ac3dec->audblk.lfeexps[2] = GetBits (&p_ac3dec->bit_stream,7);
+ p_ac3dec->total_bits_read += 7;
+ if (p_ac3dec->audblk.lfeexps[2] >= 125)
+ {
+ return 1;
+ }
}
/* Get the parametric bit allocation parameters */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.baie = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ p_ac3dec->audblk.baie = GetBits (&p_ac3dec->bit_stream,1);
+ p_ac3dec->total_bits_read += 1;
if ((!blknum) && (!p_ac3dec->audblk.baie))
- return 1;
-
- if (p_ac3dec->audblk.baie) {
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->audblk.sdcycod = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->audblk.fdcycod = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->audblk.sgaincod = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->audblk.dbpbcod = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
- NeedBits (&(p_ac3dec->bit_stream), 3);
- p_ac3dec->audblk.floorcod = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 3));
- DumpBits (&(p_ac3dec->bit_stream), 3);
+ {
+ return 1;
+ }
+
+ if (p_ac3dec->audblk.baie)
+ {
+ p_ac3dec->audblk.sdcycod = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->audblk.fdcycod = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->audblk.sgaincod = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->audblk.dbpbcod = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->audblk.floorcod = GetBits (&p_ac3dec->bit_stream,3);
+ p_ac3dec->total_bits_read += 11;
}
/* Get the SNR off set info if it exists */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.snroffste = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ p_ac3dec->audblk.snroffste = GetBits (&p_ac3dec->bit_stream,1);
if ((!blknum) && (!p_ac3dec->audblk.snroffste))
- return 1;
-
- if (p_ac3dec->audblk.snroffste) {
- NeedBits (&(p_ac3dec->bit_stream), 6);
- p_ac3dec->audblk.csnroffst = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 6));
- DumpBits (&(p_ac3dec->bit_stream), 6);
-
- if (p_ac3dec->audblk.cplinu) {
- NeedBits (&(p_ac3dec->bit_stream), 4);
- p_ac3dec->audblk.cplfsnroffst = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 4));
- DumpBits (&(p_ac3dec->bit_stream), 4);
- NeedBits (&(p_ac3dec->bit_stream), 3);
- p_ac3dec->audblk.cplfgaincod = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 3));
- DumpBits (&(p_ac3dec->bit_stream), 3);
+ {
+ return 1;
+ }
+
+ if (p_ac3dec->audblk.snroffste)
+ {
+ p_ac3dec->audblk.csnroffst = GetBits (&p_ac3dec->bit_stream,6);
+ p_ac3dec->total_bits_read += 6;
+
+ if (p_ac3dec->audblk.cplinu)
+ {
+ p_ac3dec->audblk.cplfsnroffst = GetBits (&p_ac3dec->bit_stream,4);
+ p_ac3dec->audblk.cplfgaincod = GetBits (&p_ac3dec->bit_stream,3);
+ p_ac3dec->total_bits_read += 7;
}
- for (i = 0;i < p_ac3dec->bsi.nfchans; i++) {
- NeedBits (&(p_ac3dec->bit_stream), 4);
- p_ac3dec->audblk.fsnroffst[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 4));
- DumpBits (&(p_ac3dec->bit_stream), 4);
- NeedBits (&(p_ac3dec->bit_stream), 3);
- p_ac3dec->audblk.fgaincod[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 3));
- DumpBits (&(p_ac3dec->bit_stream), 3);
+ for (i = 0;i < p_ac3dec->bsi.nfchans; i++)
+ {
+ p_ac3dec->audblk.fsnroffst[i] = GetBits (&p_ac3dec->bit_stream,4);
+ p_ac3dec->audblk.fgaincod[i] = GetBits (&p_ac3dec->bit_stream,3);
}
- if (p_ac3dec->bsi.lfeon) {
- NeedBits (&(p_ac3dec->bit_stream), 4);
- p_ac3dec->audblk.lfefsnroffst = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 4));
- DumpBits (&(p_ac3dec->bit_stream), 4);
- NeedBits (&(p_ac3dec->bit_stream), 3);
- p_ac3dec->audblk.lfefgaincod = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 3));
- DumpBits (&(p_ac3dec->bit_stream), 3);
+ p_ac3dec->total_bits_read += 7 * p_ac3dec->bsi.nfchans;
+ if (p_ac3dec->bsi.lfeon)
+ {
+ p_ac3dec->audblk.lfefsnroffst = GetBits (&p_ac3dec->bit_stream,4);
+ p_ac3dec->audblk.lfefgaincod = GetBits (&p_ac3dec->bit_stream,3);
+ p_ac3dec->total_bits_read += 7;
}
}
/* Get coupling leakage info if it exists */
- if (p_ac3dec->audblk.cplinu) {
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.cplleake = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
- if ((!blknum) && (!p_ac3dec->audblk.cplleake))
- return 1;
-
- if (p_ac3dec->audblk.cplleake) {
- NeedBits (&(p_ac3dec->bit_stream), 3);
- p_ac3dec->audblk.cplfleak = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 3));
- DumpBits (&(p_ac3dec->bit_stream), 3);
- NeedBits (&(p_ac3dec->bit_stream), 3);
- p_ac3dec->audblk.cplsleak = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 3));
- DumpBits (&(p_ac3dec->bit_stream), 3);
+ if (p_ac3dec->audblk.cplinu)
+ {
+ p_ac3dec->audblk.cplleake = GetBits (&p_ac3dec->bit_stream,1);
+ p_ac3dec->total_bits_read += 1;
+ if ((!blknum) && (!p_ac3dec->audblk.cplleake))
+ {
+ return 1;
+ }
+
+ if (p_ac3dec->audblk.cplleake)
+ {
+ p_ac3dec->audblk.cplfleak = GetBits (&p_ac3dec->bit_stream,3);
+ p_ac3dec->audblk.cplsleak = GetBits (&p_ac3dec->bit_stream,3);
+ p_ac3dec->total_bits_read += 6;
}
}
/* Get the delta bit alloaction info */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.deltbaie = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
-
- if (p_ac3dec->audblk.deltbaie) {
- if (p_ac3dec->audblk.cplinu) {
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->audblk.cpldeltbae = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
- if (p_ac3dec->audblk.cpldeltbae == 3)
- return 1;
+ p_ac3dec->audblk.deltbaie = GetBits (&p_ac3dec->bit_stream,1);
+ p_ac3dec->total_bits_read += 1;
+
+ if (p_ac3dec->audblk.deltbaie)
+ {
+ if (p_ac3dec->audblk.cplinu)
+ {
+ p_ac3dec->audblk.cpldeltbae = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->total_bits_read += 2;
+ if (p_ac3dec->audblk.cpldeltbae == 3)
+ {
+ return 1;
+ }
}
- for (i = 0;i < p_ac3dec->bsi.nfchans; i++) {
- NeedBits (&(p_ac3dec->bit_stream), 2);
- p_ac3dec->audblk.deltbae[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 2));
- DumpBits (&(p_ac3dec->bit_stream), 2);
- if (p_ac3dec->audblk.deltbae[i] == 3)
- return 1;
+ for (i = 0;i < p_ac3dec->bsi.nfchans; i++)
+ {
+ p_ac3dec->audblk.deltbae[i] = GetBits (&p_ac3dec->bit_stream,2);
+ p_ac3dec->total_bits_read += 2;
+ if (p_ac3dec->audblk.deltbae[i] == 3)
+ {
+ return 1;
+ }
}
- if (p_ac3dec->audblk.cplinu && (p_ac3dec->audblk.cpldeltbae == DELTA_BIT_NEW)) {
- NeedBits (&(p_ac3dec->bit_stream), 3);
- p_ac3dec->audblk.cpldeltnseg = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 3));
- DumpBits (&(p_ac3dec->bit_stream), 3);
- for (i = 0;i < p_ac3dec->audblk.cpldeltnseg + 1; i++) {
- NeedBits (&(p_ac3dec->bit_stream), 5);
- p_ac3dec->audblk.cpldeltoffst[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 5));
- DumpBits (&(p_ac3dec->bit_stream), 5);
- NeedBits (&(p_ac3dec->bit_stream), 4);
- p_ac3dec->audblk.cpldeltlen[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 4));
- DumpBits (&(p_ac3dec->bit_stream), 4);
- NeedBits (&(p_ac3dec->bit_stream), 3);
- p_ac3dec->audblk.cpldeltba[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 3));
- DumpBits (&(p_ac3dec->bit_stream), 3);
+ if (p_ac3dec->audblk.cplinu && (p_ac3dec->audblk.cpldeltbae == DELTA_BIT_NEW))
+ {
+ p_ac3dec->audblk.cpldeltnseg = GetBits (&p_ac3dec->bit_stream,3);
+ for (i = 0;i < p_ac3dec->audblk.cpldeltnseg + 1; i++)
+ {
+ p_ac3dec->audblk.cpldeltoffst[i] = GetBits (&p_ac3dec->bit_stream,5);
+ p_ac3dec->audblk.cpldeltlen[i] = GetBits (&p_ac3dec->bit_stream,4);
+ p_ac3dec->audblk.cpldeltba[i] = GetBits (&p_ac3dec->bit_stream,3);
}
+ p_ac3dec->total_bits_read += 12 * (p_ac3dec->audblk.cpldeltnseg + 1) + 3;
}
- for (i = 0; i < p_ac3dec->bsi.nfchans; i++) {
- if (p_ac3dec->audblk.deltbae[i] == DELTA_BIT_NEW) {
- NeedBits (&(p_ac3dec->bit_stream), 3);
- p_ac3dec->audblk.deltnseg[i] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 3));
- DumpBits (&(p_ac3dec->bit_stream), 3);
+ for (i = 0; i < p_ac3dec->bsi.nfchans; i++)
+ {
+ if (p_ac3dec->audblk.deltbae[i] == DELTA_BIT_NEW)
+ {
+ p_ac3dec->audblk.deltnseg[i] = GetBits (&p_ac3dec->bit_stream,3);
// if (p_ac3dec->audblk.deltnseg[i] >= 8)
// fprintf (stderr, "parse debug: p_ac3dec->audblk.deltnseg[%i] == %i\n", i, p_ac3dec->audblk.deltnseg[i]);
- for (j = 0; j < p_ac3dec->audblk.deltnseg[i] + 1; j++) {
- NeedBits (&(p_ac3dec->bit_stream), 5);
- p_ac3dec->audblk.deltoffst[i][j] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 5));
- DumpBits (&(p_ac3dec->bit_stream), 5);
- NeedBits (&(p_ac3dec->bit_stream), 4);
- p_ac3dec->audblk.deltlen[i][j] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 4));
- DumpBits (&(p_ac3dec->bit_stream), 4);
- NeedBits (&(p_ac3dec->bit_stream), 3);
- p_ac3dec->audblk.deltba[i][j] = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 3));
- DumpBits (&(p_ac3dec->bit_stream), 3);
+ for (j = 0; j < p_ac3dec->audblk.deltnseg[i] + 1; j++)
+ {
+ p_ac3dec->audblk.deltoffst[i][j] = GetBits (&p_ac3dec->bit_stream,5);
+ p_ac3dec->audblk.deltlen[i][j] = GetBits (&p_ac3dec->bit_stream,4);
+ p_ac3dec->audblk.deltba[i][j] = GetBits (&p_ac3dec->bit_stream,3);
}
+ p_ac3dec->total_bits_read += 12 * (p_ac3dec->audblk.deltnseg[i] + 1) + 3;
}
}
}
/* Check to see if there's any dummy info to get */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- p_ac3dec->audblk.skiple = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 1));
- DumpBits (&(p_ac3dec->bit_stream), 1);
-
- if (p_ac3dec->audblk.skiple) {
- NeedBits (&(p_ac3dec->bit_stream), 9);
- p_ac3dec->audblk.skipl = (u16)(p_ac3dec->bit_stream.buffer >> (32 - 9));
- DumpBits (&(p_ac3dec->bit_stream), 9);
-
- for (i = 0; i < p_ac3dec->audblk.skipl ; i++) {
- NeedBits (&(p_ac3dec->bit_stream), 8);
- DumpBits (&(p_ac3dec->bit_stream), 8);
+ p_ac3dec->audblk.skiple = GetBits (&p_ac3dec->bit_stream,1);
+ p_ac3dec->total_bits_read += 1;
+
+ if (p_ac3dec->audblk.skiple)
+ {
+ p_ac3dec->audblk.skipl = GetBits (&p_ac3dec->bit_stream,9);
+
+ for (i = 0; i < p_ac3dec->audblk.skipl ; i++)
+ {
+ GetBits (&p_ac3dec->bit_stream,8);
}
+ p_ac3dec->total_bits_read += 8 * p_ac3dec->audblk.skipl + 9;
}
-
+
+#ifdef TRACE
+ parse_audblk_stats(p_ac3dec);
+#endif
+
return 0;
}
int i;
int skip_length;
- skip_length = (p_ac3dec->syncinfo.frame_size * 16) - p_ac3dec->bit_stream.total_bits_read - 17 - 1;
-// fprintf (stderr, "parse debug: skip_length == %i\n", skip_length);
+ skip_length = (p_ac3dec->syncinfo.frame_size * 16) - p_ac3dec->total_bits_read - 17 - 1;
- for (i = 0; i < skip_length; i++) {
- NeedBits (&(p_ac3dec->bit_stream), 1);
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ for (i = 0; i < skip_length; i++)
+ {
+ RemoveBits (&p_ac3dec->bit_stream,1);
}
/* get the auxdata exists bit */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- DumpBits (&(p_ac3dec->bit_stream), 1);
-
+ RemoveBits (&p_ac3dec->bit_stream,1);
+
/* Skip the CRC reserved bit */
- NeedBits (&(p_ac3dec->bit_stream), 1);
- DumpBits (&(p_ac3dec->bit_stream), 1);
+ RemoveBits (&p_ac3dec->bit_stream,1);
/* Get the crc */
- NeedBits (&(p_ac3dec->bit_stream), 16);
- DumpBits (&(p_ac3dec->bit_stream), 16);
+ RemoveBits (&p_ac3dec->bit_stream,16);
}
+
+#ifdef TRACE
+static void parse_bsi_stats (ac3dec_t * p_ac3dec) /* Some stats */
+{
+ struct mixlev_s
+ {
+ float clev;
+ char *desc;
+ };
+ static const char *service_ids[8] =
+ {
+ "CM","ME","VI","HI",
+ "D", "C","E", "VO"
+ };
+/*
+ static const struct mixlev_s cmixlev_tbl[4] =
+ {
+ {0.707, "(-3.0 dB)"}, {0.595, "(-4.5 dB)"},
+ {0.500, "(-6.0 dB)"}, {1.0, "Invalid"}
+ };
+ static const struct mixlev_s smixlev_tbl[4] =
+ {
+ {0.707, "(-3.0 dB)"}, {0.500, "(-6.0 dB)"},
+ { 0.0, "off "}, { 1.0, "Invalid"}
+ };
+ */
+
+ static int i=0;
+
+ if ( !i )
+ {
+/* if ((p_ac3dec->bsi.acmod & 0x1) && (p_ac3dec->bsi.acmod != 0x1))
+ printf("CentreMixLevel %s ",cmixlev_tbl[p_ac3dec->bsi.cmixlev].desc);
+ if (p_ac3dec->bsi.acmod & 0x4)
+ printf("SurMixLevel %s",smixlev_tbl[p_ac3dec->bsi.cmixlev].desc);
+ */
+ intf_Msg ( "(ac3dec_parsebsi) %s %d.%d Mode",
+ service_ids[p_ac3dec->bsi.bsmod],
+ p_ac3dec->bsi.nfchans,p_ac3dec->bsi.lfeon);
+ }
+ i++;
+
+ if ( i > 100 )
+ i = 0;
+}
+
+static void parse_audblk_stats (ac3dec_t * p_ac3dec)
+{
+ char *exp_strat_tbl[4] = {"R ","D15 ","D25 ","D45 "};
+ u32 i;
+
+ intf_ErrMsg ("(ac3dec_parseaudblk) ");
+ intf_ErrMsg ("%s ",p_ac3dec->audblk.cplinu ? "cpl on" : "cpl off");
+ intf_ErrMsg ("%s ",p_ac3dec->audblk.baie? "bai" : " ");
+ intf_ErrMsg ("%s ",p_ac3dec->audblk.snroffste? "snroffst" : " ");
+ intf_ErrMsg ("%s ",p_ac3dec->audblk.deltbaie? "deltba" : " ");
+ intf_ErrMsg ("%s ",p_ac3dec->audblk.phsflginu? "phsflg" : " ");
+ intf_ErrMsg ("(%s %s %s %s %s) ",exp_strat_tbl[p_ac3dec->audblk.chexpstr[0]],
+ exp_strat_tbl[p_ac3dec->audblk.chexpstr[1]],exp_strat_tbl[p_ac3dec->audblk.chexpstr[2]],
+ exp_strat_tbl[p_ac3dec->audblk.chexpstr[3]],exp_strat_tbl[p_ac3dec->audblk.chexpstr[4]]);
+ intf_ErrMsg ("[");
+ for(i=0;i<p_ac3dec->bsi.nfchans;i++)
+ intf_ErrMsg ("%1d",p_ac3dec->audblk.blksw[i]);
+ intf_ErrMsg ("]");
+}
+#endif
+
projects / vlc / blobdiff