#define kMaxNumberDecodeStreams 8
#define kMaxNumberVideoPIDS 16
-#define kMaxNumberAudioPIDS 32
+#define kMaxNumberAudioPIDS 16
//#define kVideoStream 0
//#define kAudioStream 1
#define kNumDecodeBuffers 2
int ts_number_video_pids;
int ts_number_audio_pids;
- int ts_selected_audio_pid_index;
unsigned char* ts_packetbuf[kMaxNumberDecodeStreams];
int ts_packetpos[kMaxNumberDecodeStreams];
static void hb_ts_stream_decode(hb_stream_t *stream);
static void hb_ts_stream_reset(hb_stream_t *stream);
static void hb_stream_put_back(hb_stream_t *stream, int i);
-static void hb_stream_set_audio_id_and_codec(hb_stream_t *stream, hb_audio_t *audio);
+static hb_audio_t *hb_ts_stream_set_audio_id_and_codec(hb_stream_t *stream,
+ int aud_pid_index);
+static void hb_ps_stream_find_audio_ids(hb_stream_t *stream, hb_title_t *title);
+static off_t align_to_next_packet(FILE* f);
-int hb_stream_is_stream_type( char * path )
+
+static inline int check_ps_sync(const uint8_t *buf)
{
- if ((strstr(path,".mpg") != NULL) ||
- (strstr(path,".vob") != NULL) ||
- (strstr(path, ".VOB") != NULL) ||
- (strstr(path, ".mpeg") != NULL) ||
- (strstr(path,".ts") != NULL) ||
- (strstr(path, ".m2t") != NULL) ||
- (strstr(path, ".TS") != NULL))
- {
- return 1;
- }
- else
+ // a legal MPEG program stream must start with a Pack header in the
+ // first four bytes.
+ return (buf[0] == 0x00) && (buf[1] == 0x00) &&
+ (buf[2] == 0x01) && (buf[3] == 0xba);
+}
+
+static inline int check_ts_sync(const uint8_t *buf)
+{
+ // must have initial sync byte, no scrambling & a legal adaptation ctrl
+ return (buf[0] == 0x47) && ((buf[3] >> 6) == 0) && ((buf[3] >> 4) > 0);
+}
+
+static inline int have_ts_sync(const uint8_t *buf)
+{
+ return check_ts_sync(&buf[0*188]) && check_ts_sync(&buf[1*188]) &&
+ check_ts_sync(&buf[2*188]) && check_ts_sync(&buf[3*188]) &&
+ check_ts_sync(&buf[4*188]) && check_ts_sync(&buf[5*188]) &&
+ check_ts_sync(&buf[6*188]) && check_ts_sync(&buf[7*188]);
+}
+
+static int hb_stream_check_for_ts(const uint8_t *buf)
+{
+ // transport streams should have a sync byte every 188 bytes.
+ // search the first KB of buf looking for at least 8 consecutive
+ // correctly located sync patterns.
+ int offset = 0;
+
+ for ( offset = 0; offset < 1024; ++offset )
+ {
+ if ( have_ts_sync( &buf[offset]) )
+ return 1;
+ }
+ return 0;
+}
+
+static int hb_stream_check_for_ps(const uint8_t *buf)
+{
+ // program streams should have a Pack header every 2048 bytes.
+ // check that we have 4 of these.
+ return check_ps_sync(&buf[0*2048]) && check_ps_sync(&buf[1*2048]) &&
+ check_ps_sync(&buf[2*2048]) && check_ps_sync(&buf[3*2048]);
+}
+
+static int hb_stream_get_type(hb_stream_t *stream)
+{
+ uint8_t buf[2048*4];
+
+ if ( fread(buf, 1, sizeof(buf), stream->file_handle) == sizeof(buf) )
+ {
+ if ( hb_stream_check_for_ts(buf) != 0 )
+ {
+ hb_log("file is MPEG Transport Stream");
+ stream->stream_type = hb_stream_type_transport;
+ hb_ts_stream_init(stream);
+ return 1;
+ }
+ if ( hb_stream_check_for_ps(buf) != 0 )
+ {
+ hb_log("file is MPEG Program Stream");
+ stream->stream_type = hb_stream_type_program;
+ return 1;
+ }
+ }
return 0;
}
d = calloc( sizeof( hb_stream_t ), 1 );
- /* Open device */
- if( !( d->file_handle = fopen( path, "rb" ) ) )
+ /* open the file and see if it's a type we know about. return a stream
+ * reference structure if we can deal with it & NULL otherwise. */
+ if( ( d->file_handle = fopen( path, "rb" ) ) )
{
- hb_log( "hb_stream_open: fopen failed (%s)", path );
- goto fail;
+ d->path = strdup( path );
+ if (d->path != NULL && hb_stream_get_type( d ) != 0 )
+ {
+ return d;
+ }
+ fclose( d->file_handle );
+ if (d->path)
+ free( d->path );
}
-
- d->path = strdup( path );
-
- if ( ( strstr(d->path,".ts") != NULL) || ( strstr(d->path,".m2t") != NULL) || ( strstr(d->path,".TS") != NULL) )
- {
- d->stream_type = hb_stream_type_transport;
- hb_ts_stream_init(d);
- }
- else if (( strstr(d->path,".mpg") != NULL) || ( strstr(d->path,".vob") != NULL) || ( strstr(d->path,".mpeg") != NULL) || ( strstr(d->path,".VOB") != NULL))
- {
- d->stream_type = hb_stream_type_program;
- }
-
- return d;
-
-fail:
+ hb_log( "hb_stream_open: open %s failed", path );
free( d );
return NULL;
}
d->ts_packetbuf[i] = NULL;
}
}
-
+ free( d->path );
free( d );
*_d = NULL;
}
+/* when the file was first opened we made entries for all the audio elementary
+ * streams we found in it. Streams that were later found during the preview scan
+ * now have an audio codec, type, rate, etc., associated with them. At the end
+ * of the scan we delete all the audio entries that weren't found by the scan
+ * or don't have a format we support. This routine deletes audio entry 'indx'
+ * by copying all later entries down one slot. */
+static void hb_stream_delete_audio_entry(hb_stream_t *stream, int indx)
+{
+ int i;
+
+ for (i = indx+1; i < stream->ts_number_audio_pids; ++i)
+ {
+ stream->ts_audio_pids[indx] = stream->ts_audio_pids[i];
+ stream->ts_audio_stream_type[indx] = stream->ts_audio_stream_type[i];
+ ++indx;
+ }
+ --stream->ts_number_audio_pids;
+}
+
/***********************************************************************
* hb_ps_stream_title_scan
***********************************************************************
{
// 'Barebones Title'
hb_title_t *aTitle = hb_title_init( stream->path, 0 );
+ aTitle->index = 1;
// Copy part of the stream path to the title name
char *sep = strrchr(stream->path, '/');
chapter->seconds = aTitle->seconds;
hb_list_add( aTitle->list_chapter, chapter );
- int i=0, num_audio_tracks = 1;
-
+ // Figure out how many audio streams we really have:
+ // - For transport streams, for each PID listed in the PMT (whether
+ // or not it was an audio stream type) read the bitstream until we
+ // find an packet from that PID containing a PES header and see if
+ // the elementary stream is an audio type.
+ // - For program streams read the first 4MB and take every unique
+ // audio stream we find.
if (stream->stream_type == hb_stream_type_transport)
{
- num_audio_tracks = stream->ts_number_audio_pids;
- }
-
- for (i=0; i < num_audio_tracks ; i++)
- {
- // Basic AC-3 Audio track
- hb_audio_t * audio;
- audio = calloc( sizeof( hb_audio_t ), 1 );
+ int i;
- audio->source_pid = stream->ts_audio_pids[i];
-
- hb_stream_set_audio_id_and_codec(stream, audio);
-
- hb_list_add( aTitle->list_audio, audio );
+ for (i=0; i < stream->ts_number_audio_pids; i++)
+ {
+ hb_audio_t *audio = hb_ts_stream_set_audio_id_and_codec(stream, i);
+ if (audio->codec)
+ hb_list_add( aTitle->list_audio, audio );
+ else
+ {
+ free(audio);
+ hb_stream_delete_audio_entry(stream, i);
+ --i;
+ }
+ }
}
-
+ else
+ {
+ hb_ps_stream_find_audio_ids(stream, aTitle);
+ }
+
return aTitle;
}
+/*
+ * scan the next MB of 'stream' to find the next start packet for
+ * the Packetized Elementary Stream associated with TS PID 'pid'.
+ */
+static const uint8_t *hb_ts_stream_getPEStype(hb_stream_t *stream, uint32_t pid)
+{
+ static uint8_t buf[188];
+ int npack = 100000; // max packets to read
+
+ while (--npack >= 0)
+ {
+ if (fread(buf, 1, 188, stream->file_handle) != 188)
+ {
+ hb_log("hb_ts_stream_getPEStype: EOF while searching for PID 0x%x", pid);
+ return 0;
+ }
+ if (buf[0] != 0x47)
+ {
+ hb_log("hb_ts_stream_getPEStype: lost sync while searching for PID 0x%x", pid);
+ align_to_next_packet(stream->file_handle);
+ continue;
+ }
+
+ /*
+ * The PES header is only in TS packets with 'start' set so we check
+ * that first then check for the right PID.
+ */
+ if ((buf[1] & 0x40) == 0 || (buf[1] & 0x1f) != (pid >> 8) ||
+ buf[2] != (pid & 0xff))
+ {
+ // not a start packet or not the pid we want
+ continue;
+ }
+
+ /* skip over the TS hdr to return a pointer to the PES hdr */
+ int udata = 4;
+ switch (buf[3] & 0x30)
+ {
+ case 0x00: // illegal
+ case 0x20: // fill packet
+ continue;
+
+ case 0x30: // adaptation
+ if (buf[4] > 182)
+ {
+ hb_log("hb_ts_stream_getPEStype: invalid adaptation field length %d for PID 0x%x", buf[4], pid);
+ continue;
+ }
+ udata += buf[4] + 1;
+ break;
+ }
+ return &buf[udata];
+ }
+
+ /* didn't find it */
+ return 0;
+}
+
+static uint64_t hb_ps_stream_getVideoPTS(hb_stream_t *stream)
+{
+ hb_buffer_t *buf = hb_buffer_init(HB_DVD_READ_BUFFER_SIZE);
+ hb_list_t *list = hb_list_init();
+ // how many blocks we read while searching for a video PES header
+ int blksleft = 1024;
+ uint64_t pts = 0;
+
+ while (--blksleft >= 0 && hb_stream_read(stream, buf) == 1)
+ {
+ hb_buffer_t *es;
+
+ // 'buf' contains an MPEG2 PACK - get a list of all it's elementary streams
+ hb_demux_ps(buf, list);
+
+ while ( ( es = hb_list_item( list, 0 ) ) )
+ {
+ hb_list_rem( list, es );
+ if ( es->id == 0xe0 )
+ {
+ // this PES contains video - if there's a PTS we're done
+ // hb_demux_ps left the PTS in buf_es->start.
+ if ( es->start != ~0 )
+ {
+ pts = es->start;
+ blksleft = 0;
+ break;
+ }
+ }
+ hb_buffer_close( &es );
+ }
+ }
+ hb_list_empty( &list );
+ hb_buffer_close(&buf);
+ return pts;
+}
+
/***********************************************************************
* hb_stream_duration
***********************************************************************
*
**********************************************************************/
-void hb_stream_duration(hb_stream_t *stream, hb_title_t *inTitle)
+struct pts_pos {
+ uint64_t pos; /* file position of this PTS sample */
+ uint64_t pts; /* PTS from video stream */
+};
+
+static struct pts_pos hb_sample_pts(hb_stream_t *stream, uint64_t fpos)
{
- // VOB Files often have exceedingly unusual PTS values in them - they will progress for a while
- // and then reset without warning !
- if (strstr(stream->path,".vob") != NULL)
- {
- // So we'll use a 'fake duration' that should give enough time !
- int64_t duration = 4 * 3600 * 90000;
- inTitle->duration = duration; //90LL * dvdtime2msec( &d->pgc->playback_time );
- inTitle->hours = inTitle->duration / 90000 / 3600;
- inTitle->minutes = ( ( inTitle->duration / 90000 ) % 3600 ) / 60;
- inTitle->seconds = ( inTitle->duration / 90000 ) % 60;
- return;
- }
+ struct pts_pos pp = { 0, 0 };
- unsigned char *buf = (unsigned char *) malloc(4096);
- int done = 0;
- off_t cur_pos;
- int64_t first_pts = 0, last_pts = 0;
-
- // To calculate the duration we look for the first and last presentation time stamps in the stream for video data
- // and then use the delta
- while (!done)
+ if ( stream->stream_type == hb_stream_type_program )
{
- cur_pos = ftello(stream->file_handle);
- if (fread(buf, 4096, 1, stream->file_handle) == 1)
- {
- int i=0;
- for (i=0; (i <= 4092) && !done; i++)
+ // round address down to nearest dvd sector start
+ fpos &=~ ( HB_DVD_READ_BUFFER_SIZE - 1 );
+ fseeko( stream->file_handle, fpos, SEEK_SET );
+ pp.pts = hb_ps_stream_getVideoPTS( stream );
+ }
+ else
+ {
+ const uint8_t *buf;
+ fseeko( stream->file_handle, fpos, SEEK_SET );
+ align_to_next_packet( stream->file_handle );
+ buf = hb_ts_stream_getPEStype( stream, stream->ts_video_pids[0] );
+ if ( buf == NULL )
{
- if ((buf[i] == 0x00) && (buf[i+1] == 0x00) && (buf[i+2] == 0x01) && (buf[i+3] == 0xe0)) // Found a Video Stream
- {
- // Now look for a PTS field - we need to make sure we have enough space so we back up a little and read
- // some more data
- fseeko(stream->file_handle, cur_pos + i, SEEK_SET);
- if (fread(buf, 4096, 1, stream->file_handle) == 1)
- {
- int has_pts = ( ( buf[7] >> 6 ) & 0x2 ) ? 1 : 0;
- if (has_pts)
- {
- first_pts = ( ( ( (uint64_t) buf[9] >> 1 ) & 0x7 ) << 30 ) +
- ( buf[10] << 22 ) +
- ( ( buf[11] >> 1 ) << 15 ) +
- ( buf[12] << 7 ) +
- ( buf[13] >> 1 );
- done = 1;
- }
- else
- {
- fseeko(stream->file_handle, cur_pos, SEEK_SET);
- fread(buf, 4096, 1, stream->file_handle);
- }
- }
- }
+ hb_log("hb_sample_pts: couldn't find video packet near %llu", fpos);
+ return pp;
}
- }
- else
- done = 1; // End of data;
+ if ( ( buf[7] >> 7 ) != 1 )
+ {
+ hb_log("hb_sample_pts: no PTS in video packet near %llu", fpos);
+ return pp;
+ }
+ pp.pts = ( ( (uint64_t)buf[9] >> 1 ) & 7 << 30 ) |
+ ( (uint64_t)buf[10] << 22 ) |
+ ( ( (uint64_t)buf[11] >> 1 ) << 15 ) |
+ ( (uint64_t)buf[12] << 7 ) |
+ ( (uint64_t)buf[13] >> 1 );
}
+ pp.pos = ftello(stream->file_handle);
+ hb_log("hb_sample_pts: pts %lld at %llu", pp.pts, pp.pos );
+ return pp;
+}
- // Now work back from the end of the stream
- fseeko(stream->file_handle,0 ,SEEK_END);
-
- done = 0;
- while (!done)
+static void hb_stream_duration(hb_stream_t *stream, hb_title_t *inTitle)
+{
+ // To calculate the duration we get video presentation time stamps
+ // at a couple places in the file then use their difference scaled
+ // by the ratio of the distance between our measurement points &
+ // the size of the file. The issue is that our video file may have
+ // chunks from several different program fragments (main feature,
+ // commercials, station id, trailers, etc.) all with their own base
+ // pts value. We need to difference two pts's from the same program
+ // fragment. Since extraneous material is very likely at the beginning
+ // and end of the content, for now we take a time stamp from 25%
+ // into the file & 75% into the file then double their difference
+ // to get the total duration.
+ struct pts_pos first_pts, last_pts;
+
+ fseeko(stream->file_handle, 0, SEEK_END);
+ uint64_t fsize = ftello(stream->file_handle);
+ first_pts = hb_sample_pts(stream, fsize >> 2);
+ last_pts = hb_sample_pts(stream, fsize - (fsize >> 2) );
+
+ if ( first_pts.pos && last_pts.pos && first_pts.pos != last_pts.pos )
{
- // Back up a little
- if (fseeko(stream->file_handle, -4096, SEEK_CUR) < 0)
- {
- done = 1;
- break;
- }
-
- cur_pos = ftello(stream->file_handle);
- if (fread(buf, 4096, 1, stream->file_handle) == 1)
- {
- int i=0;
- for (i=4092; (i >= 0) && !done; i--)
- {
- if ((buf[i] == 0x00) && (buf[i+1] == 0x00) && (buf[i+2] == 0x01) && (buf[i+3] == 0xe0)) // Found a Video Stream
- {
- // Now look for a PTS field - we need to make sure we have enough space so we back up a little and read
- // some more data
- fseeko(stream->file_handle, cur_pos + i, SEEK_SET);
- fread(buf, 1, 4096, stream->file_handle);
-
- unsigned char pts_dts_flag = buf[7];
-
- int has_pts = ( ( buf[7] >> 6 ) & 0x2 ) ? 1 : 0;
- if (has_pts)
- {
- last_pts = ( ( ( (uint64_t) buf[9] >> 1 ) & 0x7 ) << 30 ) +
- ( buf[10] << 22 ) +
- ( ( buf[11] >> 1 ) << 15 ) +
- ( buf[12] << 7 ) +
- ( buf[13] >> 1 );
-
- done = 1;
- }
- else
- {
- // Re Read the original data and carry on (i is still valid in the old buffer)
- fseeko(stream->file_handle, cur_pos, SEEK_SET);
- fread(buf, 4096, 1, stream->file_handle);
- }
- }
- }
- fseeko(stream->file_handle, -4096, SEEK_CUR); // 'Undo' the last read
- }
- else
- done = 1; // End of data;
+ uint64_t dur = ( ( last_pts.pts - first_pts.pts ) * fsize ) /
+ ( last_pts.pos - first_pts.pos );
+ inTitle->duration = dur;
+ dur /= 90000;
+ inTitle->hours = dur / 3600;
+ inTitle->minutes = ( dur % 3600 ) / 60;
+ inTitle->seconds = dur % 60;
}
- free(buf);
-
- int64_t duration = last_pts - first_pts;
- inTitle->duration = duration; //90LL * dvdtime2msec( &d->pgc->playback_time );
- inTitle->hours = inTitle->duration / 90000 / 3600;
- inTitle->minutes = ( ( inTitle->duration / 90000 ) % 3600 ) / 60;
- inTitle->seconds = ( inTitle->duration / 90000 ) % 60;
-
+ rewind(stream->file_handle);
}
/***********************************************************************
fseeko(src_stream->file_handle,0 ,SEEK_END);
stream_size = ftello(src_stream->file_handle);
new_pos = (off_t) ((double) (stream_size) * pos_ratio);
+ new_pos &=~ (HB_DVD_READ_BUFFER_SIZE - 1);
int r = fseeko(src_stream->file_handle, new_pos, SEEK_SET);
if (r == -1)
return 1;
}
-/***********************************************************************
- * hb_stream_set_audio_id_and_codec
- ***********************************************************************
- *
- **********************************************************************/
-void hb_stream_set_audio_id_and_codec(hb_stream_t *stream, hb_audio_t *audio)
+static hb_audio_t *hb_ts_stream_set_audio_id_and_codec(hb_stream_t *stream,
+ int aud_pid_index)
{
- off_t cur_pos;
- cur_pos = ftello(stream->file_handle);
- int done = 0;
- hb_buffer_t *buf = NULL;
+ off_t cur_pos = ftello(stream->file_handle);
+ hb_audio_t *audio = calloc( sizeof( hb_audio_t ), 1 );
+ const uint8_t *buf;
- int cur_audio_pid_index = stream->ts_selected_audio_pid_index;
+ fseeko(stream->file_handle, 0, SEEK_SET);
+ align_to_next_packet(stream->file_handle);
+ buf = hb_ts_stream_getPEStype(stream, stream->ts_audio_pids[aud_pid_index]);
- if (stream->stream_type == hb_stream_type_transport)
- {
- int i=0;
- for (i=0; i < stream->ts_number_audio_pids; i++)
- {
- if (stream->ts_audio_pids[i] == audio->source_pid)
- {
- stream->ts_selected_audio_pid_index = i;
- break;
- }
- }
+ /* check that we found a PES header */
+ if (buf && buf[0] == 0x00 && buf[1] == 0x00 && buf[2] == 0x01)
+ {
+ if (buf[3] == 0xbd)
+ {
+ audio->id = 0x80bd | (aud_pid_index << 8);
+ audio->codec = HB_ACODEC_AC3;
+ hb_log("transport stream pid 0x%x (type 0x%x) is AC-3 audio id 0x%x",
+ stream->ts_audio_pids[aud_pid_index],
+ stream->ts_audio_stream_type[aud_pid_index],
+ audio->id);
+ stream->ts_audio_stream_type[aud_pid_index] = 0x81;
+ }
+ else if ((buf[3] & 0xe0) == 0xc0)
+ {
+ audio->id = buf[3];
+ audio->codec = HB_ACODEC_MPGA;
+ hb_log("transport stream pid 0x%x (type 0x%x) is MPEG audio id 0x%x",
+ stream->ts_audio_pids[aud_pid_index],
+ stream->ts_audio_stream_type[aud_pid_index],
+ audio->id);
+ stream->ts_audio_stream_type[aud_pid_index] = 0x03;
+ }
+ }
+ fseeko(stream->file_handle, cur_pos, SEEK_SET);
+ if (! audio->codec)
+ {
+ hb_log("transport stream pid 0x%x (type 0x%x) isn't audio",
+ stream->ts_audio_pids[aud_pid_index],
+ stream->ts_audio_stream_type[aud_pid_index]);
}
+ return audio;
+}
+
+static void add_audio_to_title(hb_title_t *title, int id)
+{
+ hb_audio_t *audio = calloc( sizeof( hb_audio_t ), 1 );
+
+ audio->id = id;
+ switch ( id >> 12 )
+ {
+ case 0x0:
+ audio->codec = HB_ACODEC_MPGA;
+ hb_log("add_audio_to_title: added MPEG audio stream 0x%x", id);
+ break;
+ case 0x2:
+ // type 2 is a DVD subtitle stream - just ignore it */
+ free( audio );
+ return;
+ case 0x8:
+ audio->codec = HB_ACODEC_AC3;
+ hb_log("add_audio_to_title: added AC3 audio stream 0x%x", id);
+ break;
+ case 0xa:
+ audio->codec = HB_ACODEC_LPCM;
+ hb_log("add_audio_to_title: added LPCM audio stream 0x%x", id);
+ break;
+ default:
+ hb_log("add_audio_to_title: unknown audio stream type 0x%x", id);
+ free( audio );
+ return;
+
+ }
+ hb_list_add( title->list_audio, audio );
+}
- //Start at the beginning of the stream
- hb_stream_seek(stream, 0.0f);
+static void hb_ps_stream_find_audio_ids(hb_stream_t *stream, hb_title_t *title)
+{
+ off_t cur_pos = ftello(stream->file_handle);
+ hb_buffer_t *buf = hb_buffer_init(HB_DVD_READ_BUFFER_SIZE);
+ hb_list_t *list = hb_list_init();
+ // how many blocks we read while searching for audio streams
+ int blksleft = 4096;
+ // there can be at most 16 unique streams in an MPEG PS (8 in a DVD)
+ // so we use a bitmap to keep track of the ones we've already seen.
+ // Bit 'i' of smap is set if we've already added the audio for
+ // audio substream id 'i' to the title's audio list.
+ uint32_t smap = 0;
+
+ // start looking 20% into the file since there's occasionally no
+ // audio at the beginning (particularly for vobs).
+ hb_stream_seek(stream, 0.2f);
- // Now we must scan forwards for a valid audio start code (0x000001xx)
- buf = hb_buffer_init(HB_DVD_READ_BUFFER_SIZE);
- while (!done)
- {
- if (hb_stream_read(stream, buf) == 1)
- {
- int i=0;
- for (i=0; (i <= HB_DVD_READ_BUFFER_SIZE-4) && (!done); i++)
+ while (--blksleft >= 0 && hb_stream_read(stream, buf) == 1)
+ {
+ hb_buffer_t *es;
+
+ // 'buf' contains an MPEG2 PACK - get a list of all it's elementary streams
+ hb_demux_ps(buf, list);
+
+ while ( ( es = hb_list_item( list, 0 ) ) )
+ {
+ hb_list_rem( list, es );
+ if ( (es->id & 0xff) == 0xbd || (es->id & 0xe0) == 0xc0 )
+ {
+ // this PES contains some kind of audio - get the substream id
+ // and check if we've seen it already.
+ int ssid = (es->id > 0xff ? es->id >> 8 : es->id) & 0xf;
+ if ( (smap & (1 << ssid)) == 0 )
{
- if ((buf->data[i] == 0x00) && (buf->data[i+1] == 0x00) && (buf->data[i+2] == 0x01))
- {
- if (buf->data[i+3] == 0xbd)
- {
- audio->id = 0x80bd;
- audio->codec = HB_ACODEC_AC3;
- done = 1;
- }
- else if ((buf->data[i+3] & 0xe0) == 0xc0)
- {
- audio->id = buf->data[i+3];
- audio->codec = HB_ACODEC_MPGA;
- done = 1;
- }
- }
+ // we haven't seen this stream before - add it to the
+ // title's list of audio streams.
+ smap |= (1 << ssid);
+ add_audio_to_title(title, es->id);
}
- }
- else
- done = 1; // End of data;
- }
- hb_buffer_close(&buf);
-
- fseeko(stream->file_handle, cur_pos, SEEK_SET);
-
- stream->ts_selected_audio_pid_index = cur_audio_pid_index;
+ }
+ hb_buffer_close( &es );
+ }
+ }
+ hb_list_empty( &list );
+ hb_buffer_close(&buf);
+ fseeko(stream->file_handle, cur_pos, SEEK_SET);
}
/***********************************************************************
{
iso639_lang_t *lang;
- if (stream->stream_type == hb_stream_type_program)
- {
- lang = lang_for_code(0x0000);
- }
- else if (stream->stream_type == hb_stream_type_transport)
+ if (stream->stream_type == hb_stream_type_transport)
{
// Find the audio stream info for this PID
- int i=0;
- for (i=0; i < stream->ts_number_audio_pids; i++)
- {
- if (stream->ts_audio_pids[i] == audio->source_pid)
- break;
- }
- if (i == stream->ts_number_audio_pids)
+ int i = (audio->id >> 8) & 0xf;
+ if (i >= stream->ts_number_audio_pids)
{
- hb_log("hb_stream_update_audio - cannot find PID 0x%x (%d) in ts_audio_pids list !", audio->source_pid, audio->source_pid);
+ hb_log("hb_stream_update_audio: no PID for audio stream 0x%x",
+ audio->id);
return;
}
audio->config.a52.ac3flags = audio->ac3flags = stream->a52_info[i].flags;
}
+ else
+ {
+ // XXX should try to get language code from the AC3 bitstream
+ lang = lang_for_code(0x0000);
+ }
if (!audio->input_channel_layout)
{
}
snprintf( audio->lang, sizeof( audio->lang ), "%s (%s)", strlen(lang->native_name) ? lang->native_name : lang->eng_name,
- audio->codec == HB_ACODEC_AC3 ? "AC3" : ( audio->codec == HB_ACODEC_MPGA ? "MPEG" : "LPCM" ) );
+ audio->codec == HB_ACODEC_AC3 ? "AC3" : ( audio->codec == HB_ACODEC_MPGA ? "MPEG" : ( audio->codec == HB_ACODEC_DCA ? "DTS" : "LPCM" ) ) );
snprintf( audio->lang_simple, sizeof( audio->lang_simple ), "%s", strlen(lang->native_name) ? lang->native_name : lang->eng_name );
snprintf( audio->iso639_2, sizeof( audio->iso639_2 ), "%s", lang->iso639_2);
}
-void hb_stream_set_selected_audio_pid_index(hb_stream_t *stream, int i)
-{
- stream->ts_selected_audio_pid_index = i;
-}
-
/***********************************************************************
* hb_stream_put_back
***********************************************************************
stream->ps_current_write_buffer_index = 0;
stream->ps_current_read_buffer_index = 1;
- // This is the index (in ts_audio_pids) of the selected
- // output stream. It should not be set until after all the
- // pids in the stream have been discovered.
- stream->ts_selected_audio_pid_index = -1;
-
// Find the audio and video pids in the stream
hb_ts_stream_find_pids(stream);
// ------------------------------------------------------------------------------------
-off_t align_to_next_packet(FILE* f)
+static off_t align_to_next_packet(FILE* f)
{
unsigned char buf[188*20];
if (pos == 188)
pos = 0; // failed to find anything!!!!!?
- fseek(f, start+pos, SEEK_SET);
+ fseeko(f, start+pos, SEEK_SET);
return pos;
}
return val;
}
+// extract what useful information we can from the elementary stream
+// descriptor list at 'dp' and add it to the stream at 'esindx'.
+// Descriptors with info we don't currently use are ignored.
+// The descriptor list & descriptor item formats are defined in
+// ISO 13818-1 (2000E) section 2.6 (pg. 62).
+static void decode_element_descriptors(hb_stream_t* stream, int esindx,
+ const uint8_t *dp, uint8_t dlen)
+{
+ const uint8_t *ep = dp + dlen;
+
+ while (dp < ep)
+ {
+ switch (dp[0])
+ {
+ case 10: // ISO_639_language descriptor
+ stream->a52_info[esindx].lang_code = lang_to_code(lang_for_code2((const char *)&dp[2]));
+ break;
+
+ default:
+ break;
+ }
+ dp += dp[1] + 2;
+ }
+}
+
int decode_program_map(hb_stream_t* stream)
{
- unsigned int pos = 0;
set_buf(stream->pmt_info.tablebuf, stream->pmt_info.tablepos, 0);
unsigned char table_id = get_bits(8);
stream->ts_number_video_pids++;
stream->ts_video_pids[stream->ts_number_video_pids-1] = elementary_PID;
}
- if ((stream_type == 0x04) || (stream_type == 0x81) || (stream_type == 0x03) || (stream_type == 0x06)) // ATSC Defines stream type 0x81 for AC-3/A52 audio, there's also some evidence of streams using type 6 for AC-3 audio too
- {
- if (stream->ts_number_audio_pids <= kMaxNumberAudioPIDS)
- stream->ts_number_audio_pids++;
- stream->ts_audio_pids[stream->ts_number_audio_pids-1] = elementary_PID;
-
- stream->a52_info[stream->ts_number_audio_pids-1].lang_code = 'e' << 8 | 'n';
- stream->ts_audio_stream_type[stream->ts_number_audio_pids-1] = stream_type;
+ else
+ {
+ // Defined audio stream types are 0x81 for AC-3/A52 audio and 0x03
+ // for mpeg audio. But content producers seem to use other
+ // values (0x04 and 0x06 have both been observed) so at this point
+ // we say everything that isn't a video pid is audio then at the end
+ // of hb_stream_title_scan we'll figure out which are really audio
+ // by looking at the PES headers.
+ i = stream->ts_number_audio_pids;
+ if (i < kMaxNumberAudioPIDS)
+ stream->ts_number_audio_pids++;
+ stream->ts_audio_pids[i] = elementary_PID;
+ stream->ts_audio_stream_type[i] = stream_type;
if (ES_info_length > 0)
{
- hb_log("decode_program_map - Elementary Stream Info Present, decode language codes ?");
+ decode_element_descriptors(stream, i, ES_info_buf, ES_info_length);
}
-
}
cur_pos += 5 /* stream header */ + ES_info_length;
free(stream->pmt_info.tablebuf);
stream->pmt_info.tablebuf = NULL;
stream->pmt_info.tablepos = 0;
- stream->pmt_info.reading = 0;
- if (decode_ok)
+ stream->pmt_info.reading = 0;
+ if (decode_ok)
return decode_ok;
}
if (write_ac3)
{
- // Make a four byte ac3 streamid
- ac3_substream_id[0] = 0x80; // Four byte AC3 CODE??
- ac3_substream_id[1] = 0x01;
- ac3_substream_id[2] = 0x00; // WHY??? OH WHY??
- ac3_substream_id[3] = 0x02;
- ac3len = 4;
+ // Make a four byte DVD ac3 stream header
+ int ssid = (curstream - stream->ts_number_video_pids) & 0xf;
+ ac3_substream_id[0] = 0x80 | ssid; // substream id
+ ac3_substream_id[1] = 0x01; // number of sync words
+ ac3_substream_id[2] = 0x00; // first offset (16 bits)
+ ac3_substream_id[3] = 0x02;
+ ac3len = 4;
}
int written = 0; // Bytes we've written to output file
static void hb_ts_stream_find_pids(hb_stream_t *stream)
{
unsigned char buf[188];
- int curstream = 0;
-
- // Stream ID info
- unsigned int program_num = 0;
- unsigned int network_PID = 0;
- unsigned int program_map_PID = 0;
// align to first packet
align_to_next_packet(stream->file_handle);
// Check sync byte
if ((buf[0] != 0x47) && (buf[0] != 0x72) && (buf[0] != 0x29))
{
-// __int64 pos = ftell64(fin);
hb_log("hb_ts_stream_find_pids - Bad transport packet (no sync byte 0x47)!");
int i = 0;
for (i=0; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
stream->ts_skipbad[i] = 1;
-// stream->ts_skipbad[kAudioStream] = stream->ts_skipbad[kVideoStream] = 1;
continue;
}
// Get pid
int pid = (((buf[1] & 0x1F) << 8) | buf[2]) & 0x1FFF;
- if ((pid == 0x0000) && (program_num == 0))
+ if ((pid == 0x0000) && (stream->ts_number_pat_entries == 0))
{
decode_PAT(buf, stream);
continue;
}
- if (pid == 0x1ffb)
- {
- printf("Need to decode PSIP data !\n");
- continue;
- }
-
- if ((network_PID > 0) && (pid == network_PID))
- {
- printf("Need to Decode network PID section !\n");
- continue;
- }
-
int pat_index = 0;
for (pat_index = 0; pat_index < stream->ts_number_pat_entries; pat_index++)
{
{
int i = 0, found_pid = -1;
- // If a selected audio pid index has been set it indicates
- // which of the potential pids we need to output so only return
- // that index for the appropriate pid. Other pids should just
- // be ignored.
- if (stream->ts_selected_audio_pid_index >= 0)
- {
- if (pid == stream->ts_audio_pids[stream->ts_selected_audio_pid_index])
- return stream->ts_selected_audio_pid_index;
- else
- return -1;
- }
-
- // If no specific pid index is set then we're probably just gathering
- // pid and/or stream information (during DecodePreviews for example)
- // so return the appropriate index
for (i = 0; (i < stream->ts_number_audio_pids) && (found_pid < 0); i++)
{
if (pid == stream->ts_audio_pids[i])
return;
}
- int bytesReadInPacket = 0;
int curr_write_buffer_index = stream->ps_current_write_buffer_index;
// Write output data until a buffer switch occurs.
while (curr_write_buffer_index == stream->ps_current_write_buffer_index)
{
- // Try to read packet..
- int bytesRead;
- if ((bytesRead = fread(buf+bytesReadInPacket, 1, 188-bytesReadInPacket, stream->file_handle)) != 188-bytesReadInPacket)
+ if ((fread(buf, 188, 1, stream->file_handle)) != 1)
{
- if (bytesRead < 0)
- bytesRead = 0;
- bytesReadInPacket += bytesRead;
-
- // Flush any outstanding output data - we're done here.
- flushbuf(stream);
- break;
- }
- else
- {
-// curfilepos += bytesRead;
- bytesReadInPacket = 0;
+ // end of file - we didn't finish filling our ps write buffer
+ // so just discard the remainder (the partial buffer is useless)
+ hb_log("hb_ts_stream_decode - eof");
+ stream->ps_decode_buffer[stream->ps_current_write_buffer_index].len = 0;
+ return;
}
// Check sync byte
if ((buf[0] != 0x47) && (buf[0] != 0x72) && (buf[0] != 0x29))
{
-// __int64 pos = ftell64(fin);
- hb_log("hb_ts_stream_decode - Bad transport packet (no sync byte 0x47)!");
+ off_t pos = ftello(stream->file_handle);
+ hb_log("hb_ts_stream_decode - no sync byte 0x47 @ %lld", pos);
for (i=0; i < stream->ts_number_video_pids + stream->ts_number_audio_pids; i++)
{
// stream->ts_skipbad[kAudioStream] = stream->ts_skipbad[kVideoStream] = 1;
// Get pid
int pid = (((buf[1] & 0x1F) << 8) | buf[2]) & 0x1FFF;
- // Skip this block
- if (index_of_pid(pid, stream) < 0)
- continue;
-// if (pid != stream->ts_audio_pids[0] && pid != stream->ts_video_pids[0])
-// continue;
-
// Get the pos and buf - we organize our streams as 'n' video streams then 'm' audio streams
- int index_of_selected_pid = -1;
+ int index_of_selected_pid;
if ((index_of_selected_pid = index_of_video_pid(pid,stream)) < 0)
{
// Not a video PID perhaps audio ?
if ((index_of_selected_pid = index_of_audio_pid(pid,stream)) < 0)
{
- hb_log("hb_ts_stream_decode - Unknown pid 0x%x (%d)", pid, pid);
+ // not a pid we want
continue;
}
else
{
curstream = stream->ts_number_video_pids + index_of_selected_pid;
- if (curstream > kMaxNumberDecodeStreams)
- {
- hb_log("hb_ts_stream_decode - Too many streams %d", curstream);
- continue;
- }
}
}
else
curstream = index_of_selected_pid;
-// if (pid == stream->ts_video_pids[0])
-// curstream = 0;
-// else
-// curstream = 1;
-
// Get start code
int start;
start = (buf[1] & 0x40) != 0;
int adapt_len = 0;
// Get continuity
+ // Continuity only increments for adaption values of 0x3 or 0x01
int continuity = (buf[3] & 0xF);
- if ((stream->ts_streamcont[curstream] != -1) && (adaption & 0x01 == 0x01)) // Continuity only increments for adaption values of 0x3 or 0x01
+ if ((stream->ts_streamcont[curstream] != -1) && ((adaption & 0x01) != 0))
{
if (continuity != ((stream->ts_streamcont[curstream] + 1) & 0xF))
{
}
}
- // Get PCR
- if (start && (adaption & 0x2) && (buf[5] & 0x10))
- {
- int64_t PCR_base = ((int64_t)buf[6] << 25) | ((int64_t)buf[7] << 17) |
- ((int64_t)buf[8] << 9) | ((int64_t)buf[9] << 1) | ((int64_t)buf[10] >> 7);
- int64_t PCR_ext = ((int64_t)(buf[10] & 0x1) << 8) | ((int64_t)buf[11]);
- int64_t PCR = PCR_base * 300 + PCR_ext;
- }
-
- // Get random
-// bool random = false;
-// if (start && (adaption & 0x2))
-// random = (buf[5] & 0x40) != 0; // BUG: SOME TS STREAMS DON'T HAVE THE RANDOM BIT (ABC!! ALIAS)
-
// Found a random access point (now we can start a frame/audio packet..)
if (start)
{
{
// Curstream is a zero based index of streams and includes both video and audio streams, so we must subtract the numver of video streams
// from the indes value used here since ts_audio_stream_type is indexed only by audio streams.
- if ((stream->ts_audio_stream_type[curstream - stream->ts_number_video_pids] == 0x04) || (stream->ts_audio_stream_type[curstream - stream->ts_number_video_pids] == 0x81))
- {
- write_ac3 = hb_ts_handle_ac3_audio(stream, curstream, buf, adapt_len);
- }
- else if (stream->ts_audio_stream_type[curstream - stream->ts_number_video_pids] == 0x03)
+ if (stream->ts_audio_stream_type[curstream - stream->ts_number_video_pids] == 0x03)
{
hb_ts_handle_mpeg_audio(stream, curstream, buf, adapt_len);
}
else
{
- hb_log("hb_ts_stream_decode - Unknown Audio Stream type ! 0x%x (%d)", stream->ts_audio_stream_type[curstream - stream->ts_number_video_pids], stream->ts_audio_stream_type[curstream - stream->ts_number_video_pids]);
+ write_ac3 = hb_ts_handle_ac3_audio(stream, curstream, buf, adapt_len);
}
}
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