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;
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);
-
- 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;
}
-/*
- * scan the first MB of 'stream' to try and determine the type of 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
-
- fseeko(stream->file_handle, 0, SEEK_SET);
- align_to_next_packet(stream->file_handle);
-
- 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 hb_audio_t *hb_ts_stream_set_audio_id_and_codec(hb_stream_t *stream,
int aud_pid_index)
{
off_t cur_pos = ftello(stream->file_handle);
hb_audio_t *audio = calloc( sizeof( hb_audio_t ), 1 );
- const uint8_t *buf = hb_ts_stream_getPEStype(stream,
- stream->ts_audio_pids[aud_pid_index]);
+ const uint8_t *buf;
+
+ 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]);
/* check that we found a PES header */
if (buf && buf[0] == 0x00 && buf[1] == 0x00 && buf[2] == 0x01)
{
case 0x0:
audio->codec = HB_ACODEC_MPGA;
- hb_log("hb_ps_stream_find_audio_ids: added MPEG audio stream 0x%x", id);
+ hb_log("add_audio_to_title: added MPEG audio stream 0x%x", id);
break;
case 0x2:
- audio->codec = HB_ACODEC_LPCM;
- hb_log("hb_ps_stream_find_audio_ids: added LPCM audio stream 0x%x", id);
- break;
- case 0x4:
- audio->codec = HB_ACODEC_DCA;
- hb_log("hb_ps_stream_find_audio_ids: added DCA audio stream 0x%x", id);
- break;
+ // type 2 is a DVD subtitle stream - just ignore it */
+ free( audio );
+ return;
case 0x8:
audio->codec = HB_ACODEC_AC3;
- hb_log("hb_ps_stream_find_audio_ids: added AC3 audio stream 0x%x", id);
+ 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 );
}
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 = 2048;
+ 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;
- hb_stream_seek(stream, 0.0f);
+ // start looking 20% into the file since there's occasionally no
+ // audio at the beginning (particularly for vobs).
+ hb_stream_seek(stream, 0.2f);
while (--blksleft >= 0 && hb_stream_read(stream, buf) == 1)
{
}
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);
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 (bytesRead < 0)
- bytesRead = 0;
- bytesReadInPacket += bytesRead;
-
- // Flush any outstanding output data - we're done here.
- flushbuf(stream);
- break;
- }
- else
+ if ((fread(buf, 188, 1, stream->file_handle)) != 1)
{
-// 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
// 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;
OSDN Git Service
