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-rw-r--r--src/demuxers/demux_ts.c133
1 files changed, 88 insertions, 45 deletions
diff --git a/src/demuxers/demux_ts.c b/src/demuxers/demux_ts.c
index 1a80b7ca7..7341cc5b1 100644
--- a/src/demuxers/demux_ts.c
+++ b/src/demuxers/demux_ts.c
@@ -17,7 +17,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
- * $Id: demux_ts.c,v 1.88 2003/08/09 19:27:35 jcdutton Exp $
+ * $Id: demux_ts.c,v 1.89 2003/08/09 23:01:58 jcdutton Exp $
*
* Demultiplexer for MPEG2 Transport Streams.
*
@@ -147,7 +147,7 @@
#define TS_PAT_LOG
#define TS_READ_STATS // activates read statistics generation
#define TS_HEADER_LOG // prints out the Transport packet header.
- */
+*/
/*
* The maximum number of PIDs we are prepared to handle in a single program
@@ -870,6 +870,31 @@ static void demux_ts_get_lang_desc(demux_ts_t *this, char *dest,
memset(dest, 0, 4);
}
+/* Find the registration code (tag=5) and return it as a uint32_t
+ * This should return "AC-3" or 0x41432d33 for AC3/A52 audio tracks.
+ */
+static void demux_ts_get_reg_desc(demux_ts_t *this, uint32_t *dest,
+ const unsigned char *data, int length)
+{
+ const unsigned char *d = data;
+
+ while (d < (data + length))
+
+ {
+ if (d[0] == 5 && d[1] >= 4)
+
+ {
+ *dest = (d[2] << 24) | (d[3] << 16) | (d[4] << 8) | d[5];
+ printf("demux_ts: found registration format identifier: 0x%.4x\n", *dest);
+ return;
+ }
+ d += 2 + d[1];
+ }
+ printf("demux_ts: found no format id\n");
+ *dest = 0;
+}
+
+
/*
* NAME demux_ts_parse_pmt
*
@@ -900,7 +925,6 @@ static void demux_ts_parse_pmt (demux_ts_t *this,
ISO_13818_TYPE_D = 12, /* c */
ISO_13818_TYPE_E = 13, /* d */
ISO_13818_AUX = 14,
- PRIVATE_A52 = 0x91
} streamType;
uint32_t table_id;
@@ -911,10 +935,11 @@ static void demux_ts_parse_pmt (demux_ts_t *this,
uint32_t current_next_indicator;
uint32_t section_number;
uint32_t last_section_number;
+ uint32_t PCR_PID;
+ uint32_t program_info_length;
uint32_t crc32;
uint32_t calc_crc32;
- unsigned int programInfoLength;
- unsigned int codedLength;
+ uint32_t coded_length;
unsigned int pid;
unsigned char *stream;
unsigned int i;
@@ -992,11 +1017,11 @@ static void demux_ts_parse_pmt (demux_ts_t *this,
section_length = (this->pmt[program_count][1] << 8
| this->pmt[program_count][2]) & 0x03ff;
- codedLength = MIN (BODY_SIZE - (pkt - originalPkt) - 1,
+ coded_length = MIN (BODY_SIZE - (pkt - originalPkt) - 1,
(section_length+3) - (this->pmt_write_ptr[program_count]
- this->pmt[program_count]));
- memcpy (this->pmt_write_ptr[program_count], &pkt[5], codedLength);
- this->pmt_write_ptr[program_count] += codedLength;
+ memcpy (this->pmt_write_ptr[program_count], &pkt[5], coded_length);
+ this->pmt_write_ptr[program_count] += coded_length;
#ifdef TS_PMT_LOG
printf ("ts_demux: wr_ptr: %p, will be %p when finished\n",
@@ -1041,28 +1066,35 @@ static void demux_ts_parse_pmt (demux_ts_t *this,
* ES definitions start here...we are going to learn upto one video
* PID and one audio PID.
*/
- programInfoLength = ((this->pmt[program_count][10] << 8)
+ program_info_length = ((this->pmt[program_count][10] << 8)
| this->pmt[program_count][11]) & 0x0fff;
- stream = &this->pmt[program_count][12] + programInfoLength;
- codedLength = 13 + programInfoLength;
- if (codedLength > section_length) {
+
+/* Program info descriptor is currently just ignored.
+ * printf ("demux_ts: program_info_desc: ");
+ * for (i = 0; i < program_info_length; i++)
+ * printf ("%.2x ", this->pmt[program_count][12+i]);
+ * printf ("\n");
+ */
+ stream = &this->pmt[program_count][12] + program_info_length;
+ coded_length = 13 + program_info_length;
+ if (coded_length > section_length) {
printf ("demux error! PMT with inconsistent "
"progInfo length\n");
return;
}
- section_length -= codedLength;
+ section_length -= coded_length;
/*
* Extract the elementary streams.
*/
this->no_spu_langs = 0;
while (section_length > 0) {
- unsigned int streamInfoLength;
+ unsigned int stream_info_length;
pid = ((stream[1] << 8) | stream[2]) & 0x1fff;
- streamInfoLength = ((stream[3] << 8) | stream[4]) & 0x0fff;
- codedLength = 5 + streamInfoLength;
- if (codedLength > section_length) {
+ stream_info_length = ((stream[3] << 8) | stream[4]) & 0x0fff;
+ coded_length = 5 + stream_info_length;
+ if (coded_length > section_length) {
printf ("demux error! PMT with inconsistent "
"streamInfo length\n");
return;
@@ -1077,7 +1109,7 @@ static void demux_ts_parse_pmt (demux_ts_t *this,
case ISO_13818_VIDEO:
if (this->videoPid == INVALID_PID) {
#ifdef TS_PMT_LOG
- printf ("demux_ts: PMT video pid %.4x\n", pid);
+ printf ("demux_ts: PMT video pid 0x%.4x\n", pid);
#endif
demux_ts_pes_new(this, this->media_num, pid, this->video_fifo,stream[0]);
this->videoMedia = this->media_num;
@@ -1095,20 +1127,20 @@ static void demux_ts_parse_pmt (demux_ts_t *this,
this->audioPid = pid;
this->audioMedia = this->media_num;
demux_ts_get_lang_desc(this, this->audioLang,
- stream + 5, streamInfoLength);
+ stream + 5, stream_info_length);
}
break;
case ISO_13818_PRIVATE:
#ifdef TS_PMT_LOG
- printf ("demux_ts: PMT streamtype 13818_PRIVATE, pid: %.4x\n", pid);
+ printf ("demux_ts: PMT streamtype 13818_PRIVATE, pid: 0x%.4x\n", pid);
- for (i = 5; i < codedLength; i++)
+ for (i = 5; i < coded_length; i++)
printf ("%.2x ", stream[i]);
printf ("\n");
#endif
break;
case ISO_13818_PES_PRIVATE:
- for (i = 5; i < codedLength; i += stream[i+1] + 2) {
+ for (i = 5; i < coded_length; i += stream[i+1] + 2) {
if ((stream[i] == 0x6a) && (this->audioPid == INVALID_PID)) {
#ifdef TS_PMT_LOG
printf ("demux_ts: PMT AC3 audio pid 0x%.4x\n", pid);
@@ -1117,7 +1149,7 @@ static void demux_ts_parse_pmt (demux_ts_t *this,
this->audioPid = pid;
this->audioMedia = this->media_num;
demux_ts_get_lang_desc(this, this->audioLang,
- stream + 5, streamInfoLength);
+ stream + 5, stream_info_length);
break;
}
@@ -1159,36 +1191,42 @@ static void demux_ts_parse_pmt (demux_ts_t *this,
}
}
break;
- case PRIVATE_A52:
-#ifdef TS_PMT_LOG
- printf ("demux_ts: PMT streamtype PRIVATE_A52, pid: 0x%.4x\n", pid);
- for (i = 5; i < codedLength; i++)
- printf ("%.2x ", stream[i]);
- printf ("\n");
-#endif
- if (this->audioPid == INVALID_PID) {
- demux_ts_pes_new(this, this->media_num, pid, this->audio_fifo, stream[0]);
- this->audioPid = pid;
- this->audioMedia = this->media_num;
- demux_ts_get_lang_desc(this, this->audioLang,
- stream + 5, streamInfoLength);
- }
- break;
default:
+
+/* This following section handles all the cases where the audio track info is stored in PMT user info with stream id >= 0x80
+ * We first check that the stream id >= 0x80, because all values below that are invalid if not handled above,
+ * then we check the registration format identifier to see if it holds "AC-3" (0x41432d33) and
+ * if is does, we tag this as an audio stream.
+ * FIXME: This will need expanding if we ever see a DTS or other media format here.
+ */
+ if (this->audioPid == INVALID_PID && (stream[0] >= 0x80) ) {
+ uint32_t format_identifier=0;
+ demux_ts_get_reg_desc(this, &format_identifier,
+ stream + 5, stream_info_length);
+ if (format_identifier == 0x41432d33) {
+ demux_ts_pes_new(this, this->media_num, pid, this->audio_fifo, stream[0]);
+ this->audioPid = pid;
+ this->audioMedia = this->media_num;
+ demux_ts_get_lang_desc(this, this->audioLang,
+ stream + 5, stream_info_length);
+ break;
+ }
+ } else {
#ifdef TS_PMT_LOG
- printf ("demux_ts: PMT unknown stream_type: 0x%.2x pid: 0x%.4x\n",
- stream[0], pid);
+ printf ("demux_ts: PMT unknown stream_type: 0x%.2x pid: 0x%.4x\n",
+ stream[0], pid);
- for (i = 5; i < codedLength; i++)
- printf ("%.2x ", stream[i]);
- printf ("\n");
+ for (i = 5; i < coded_length; i++)
+ printf ("%.2x ", stream[i]);
+ printf ("\n");
#endif
+ }
break;
}
this->media_num++;
- stream += codedLength;
- section_length -= codedLength;
+ stream += coded_length;
+ section_length -= coded_length;
}
/*
@@ -1476,6 +1514,11 @@ static void demux_ts_parse_packet (demux_ts_t*this) {
printf ("demux error! transport error\n");
return;
}
+ if (pid == 0x1ffb) {
+ /* printf ("demux_ts: PSIP table. Program Guide etc....not supported yet. PID = 0x1ffb\n"); */
+ return;
+ }
+
if (transport_scrambling_control) {
if (this->videoPid == pid) {
printf ("demux_ts: selected videoPid is scrambled; skipping...\n");
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-22 14:13:40 +0000