} hb_stream_type_t;
#define kMaxNumberVideoPIDS 1
-#define kMaxNumberAudioPIDS 15
+#define kMaxNumberAudioPIDS 31
#define kMaxNumberDecodeStreams (kMaxNumberVideoPIDS+kMaxNumberAudioPIDS)
#define kMaxNumberPMTStreams 32
int ts_pos[kMaxNumberDecodeStreams];
int8_t ts_skipbad[kMaxNumberDecodeStreams];
int8_t ts_streamcont[kMaxNumberDecodeStreams];
+ uint8_t ts_pkt_summary[kMaxNumberDecodeStreams][8];
hb_buffer_t *fwrite_buf; /* PS buffer (set by hb_ts_stream_decode) */
static hb_title_t *ffmpeg_title_scan( hb_stream_t *stream );
static int ffmpeg_read( hb_stream_t *stream, hb_buffer_t *buf );
static int ffmpeg_seek( hb_stream_t *stream, float frac );
+static int ffmpeg_seek_ts( hb_stream_t *stream, int64_t ts );
/*
* streams have a bunch of state that's learned during the scan. We don't
static int hb_stream_check_for_ps(const uint8_t *buf)
{
- // program streams should start with a PACK then some other mpeg start
- // code (usually a SYS but that might be missing if we only have a clip).
- return check_ps_sync(buf) && check_ps_sc(buf);
+ // program streams should start with a PACK then some other mpeg start
+ // code (usually a SYS but that might be missing if we only have a clip).
+ int offset = 0;
+
+ for ( offset = 0; offset < 8*1024-24; ++offset )
+ {
+ if ( check_ps_sync( &buf[offset] ) && check_ps_sc( &buf[offset] ) )
+ return 1;
+ }
+ return 0;
}
static int hb_stream_check_for_dvd_ps(const uint8_t *buf)
static int hb_stream_get_type(hb_stream_t *stream)
{
uint8_t buf[2048*4];
+ int i = 64;
if ( fread(buf, 1, sizeof(buf), stream->file_handle) == sizeof(buf) )
{
stream->hb_stream_type = dvd_program;
return 1;
}
- if ( hb_stream_check_for_ps(buf) != 0 )
+ do
{
- hb_log("file is MPEG Program Stream");
- stream->hb_stream_type = program;
- return 1;
- }
+ if ( hb_stream_check_for_ps(buf) != 0 )
+ {
+ hb_log("file is MPEG Program Stream");
+ stream->hb_stream_type = program;
+ return 1;
+ }
+ // Seek back to handle start codes that run over end of last buffer
+ fseek( stream->file_handle, -28, SEEK_CUR );
+ } while ( --i && fread(buf, 1, sizeof(buf), stream->file_handle) == sizeof(buf) );
}
return 0;
}
// 'Barebones Title'
hb_title_t *aTitle = hb_title_init( stream->path, 0 );
+ aTitle->type = HB_STREAM_TYPE;
aTitle->index = 1;
// Copy part of the stream path to the title name
ep = b->data + b->alloc;
}
*cp++ = c;
+ // Non-video streams can emulate start codes, so we need
+ // to inspect PES packets and skip over their data
+ // sections to avoid mis-detection of the next pack header.
+ if ( ( strt_code >> 8 ) == 0x000001 &&
+ ( strt_code & 0xff ) >= 0xbb )
+ {
+ int len = 0;
+ c = getc_unlocked( src_stream->file_handle );
+ if ( c == EOF )
+ break;
+ len = c << 8;
+ c = getc_unlocked( src_stream->file_handle );
+ if ( c == EOF )
+ break;
+ len |= c;
+ if ( cp+len+2 > ep )
+ {
+ // need to expand the buffer
+ int curSize = cp - b->data;
+ if ( curSize * 2 > curSize+len+2 )
+ hb_buffer_realloc( b, curSize * 2 );
+ else
+ hb_buffer_realloc( b, curSize + len + 2 );
+ cp = b->data + curSize;
+ ep = b->data + b->alloc;
+ }
+ *cp++ = len >> 8;
+ *cp++ = len & 0xff;
+ fread( cp, 1, len, src_stream->file_handle );
+ cp += len;
+ }
}
funlockfile( src_stream->file_handle );
if ( c != EOF )
{
fseeko( src_stream->file_handle, -4, SEEK_CUR );
- b->size -= 4;
+ // Only 3 of the 4 bytes read were added to the buffer.
+ b->size -= 3;
}
return 1;
}
{
av_seek_frame( stream->ffmpeg_ic, -1, pos, 0);
}
+ else
+ {
+ // ffmpeg has a bug that causes the first PTS after
+ // av_find_stream_info() is called to be incorrect.
+ // av_find_stream_info is called whenever opening a file
+ // with ffmpeg. av_seek_frame clears the condition
+ // that causes the problem. since hb_stream_seek_chapter
+ // is called before we start reading, make sure
+ // we do a seek here.
+ av_seek_frame( stream->ffmpeg_ic, -1, 0LL, AVSEEK_FLAG_BACKWARD );
+ }
return 1;
}
return 1;
}
+int hb_stream_seek_ts( hb_stream_t * stream, int64_t ts )
+{
+ if ( stream->hb_stream_type == ffmpeg )
+ {
+ return ffmpeg_seek_ts( stream, ts );
+ }
+ return -1;
+}
+
static const char* make_upper( const char* s )
{
static char name[8];
switch (dp[0])
{
case 5: // Registration descriptor
- stream->ts_format_id[esindx] = (dp[2] << 24) | (dp[3] << 16) |
+ stream->ts_format_id[esindx+1] = (dp[2] << 24) | (dp[3] << 16) |
(dp[4] << 8) | dp[5];
break;
stream->a52_info[esindx].lang_code = lang_to_code(lang_for_code2((const char *)&dp[2]));
break;
+ case 0x6a: // DVB AC-3 descriptor
+ stream->ts_stream_type[esindx+1] = 0x81;
+ break;
+
default:
break;
}
if ( index_of_pid( elementary_PID, stream ) < 0 )
{
- // already have this pid - do nothing
- }
- if (stream->ts_number_video_pids == 0 && st2codec[stream_type].kind == V )
- {
- stream->ts_video_pids[0] = elementary_PID;
- stream->ts_stream_type[0] = stream_type;
- stream->ts_number_video_pids = 1;
- }
- 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)
+ // don't have this pid yet
+ if (stream->ts_number_video_pids == 0 &&
+ st2codec[stream_type].kind == V )
+ {
+ stream->ts_video_pids[0] = elementary_PID;
+ stream->ts_stream_type[0] = stream_type;
+ stream->ts_number_video_pids = 1;
+ }
+ else
{
- stream->ts_audio_pids[i] = elementary_PID;
- stream->ts_stream_type[1 + i] = stream_type;
- if (ES_info_length > 0)
+ // 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)
{
- decode_element_descriptors(stream, i, ES_info_buf,
- ES_info_length);
+ stream->ts_audio_pids[i] = elementary_PID;
+ stream->ts_stream_type[1 + i] = stream_type;
+ if (ES_info_length > 0)
+ {
+ decode_element_descriptors(stream, i, ES_info_buf,
+ ES_info_length);
+ }
+ ++stream->ts_number_audio_pids;
}
- ++stream->ts_number_audio_pids;
}
}
free(ES_info_buf);
if (cur_pos >= section_length - 4 /* stop before the CRC */)
- done_reading_stream_types = 1;
+ done_reading_stream_types = 1;
}
free(descriptor_buf);
}
}
// Keep going until we have a complete set of PIDs
- if ((stream->ts_number_video_pids > 0) && (stream->ts_number_audio_pids > 0))
+ if (stream->ts_number_video_pids > 0)
break;
}
int continuity = (buf[3] & 0xF);
if ( continuity == stream->ts_streamcont[curstream] )
{
- // we got a duplicate packet (usually used to introduce
- // a PCR when one is needed). The only thing that can
- // change in the dup is the PCR which we grabbed above
- // so ignore the rest.
- continue;
+ // Spliced transport streams can have duplicate
+ // continuity counts at the splice boundary.
+ // Test to see if the packet is really a duplicate
+ // by comparing packet summaries to see if they
+ // match.
+ uint8_t summary[8];
+
+ summary[0] = adaption;
+ summary[1] = adapt_len;
+ if (adapt_len + 4 + 6 + 9 <= 188)
+ {
+ memcpy(&summary[2], buf+4+adapt_len+9, 6);
+ }
+ else
+ {
+ memset(&summary[2], 0, 6);
+ }
+ if ( memcmp( summary, stream->ts_pkt_summary[curstream], 8 ) == 0 )
+ {
+ // we got a duplicate packet (usually used to introduce
+ // a PCR when one is needed). The only thing that can
+ // change in the dup is the PCR which we grabbed above
+ // so ignore the rest.
+ continue;
+ }
}
if ( !start && (stream->ts_streamcont[curstream] != -1) &&
!stream->ts_skipbad[curstream] &&
(int)continuity,
(stream->ts_streamcont[curstream] + 1) & 0xf );
stream->ts_streamcont[curstream] = continuity;
- continue;
- }
- stream->ts_streamcont[curstream] = continuity;
- }
+ continue;
+ }
+ stream->ts_streamcont[curstream] = continuity;
+
+ // Save a summary of this packet for later duplicate
+ // testing. The summary includes some header information
+ // and payload bytes. Should be enough to detect
+ // non-duplicates.
+ stream->ts_pkt_summary[curstream][0] = adaption;
+ stream->ts_pkt_summary[curstream][1] = adapt_len;
+ if (adapt_len + 4 + 6 + 9 <= 188)
+ {
+ memcpy(&stream->ts_pkt_summary[curstream][2],
+ buf+4+adapt_len+9, 6);
+ }
+ else
+ {
+ memset(&stream->ts_pkt_summary[curstream][2], 0, 6);
+ }
+ }
/* If we get here the packet is valid - process its data */
// 'Barebones Title'
hb_title_t *title = hb_title_init( stream->path, 0 );
+ title->type = HB_STREAM_TYPE;
title->index = 1;
// Copy part of the stream path to the title name
// we do it ourselves here. The decoder gets messed up if it
// doesn't get a SEQ header first so we consider that to be a key frame.
pkt = stream->ffmpeg_pkt->data;
- if ( pkt[0] && pkt[1] && pkt[2] == 1 && pkt[3] == 0x0f )
+ if ( !pkt[0] && !pkt[1] && pkt[2] == 1 && pkt[3] == 0x0f )
return 1;
return 0;
{
buf->start = buf->renderOffset;
}
+ else if ( buf->renderOffset == -1 && buf->start >= 0 )
+ {
+ buf->renderOffset = buf->start;
+ }
/*
* Check to see whether this video buffer is on a chapter
if ( buf->id == stream->ffmpeg_video_id && buf->start >= stream->chapter_end )
{
hb_chapter_t *chapter = hb_list_item( stream->title->list_chapter,
- ++stream->chapter );
+ stream->chapter+1 );
if( chapter )
{
+ stream->chapter++;
stream->chapter_end += chapter->duration;
buf->new_chap = stream->chapter + 1;
hb_deep_log( 2, "ffmpeg_read starting chapter %i at %"PRId64,
}
return 1;
}
+
+// Assumes that we are always seeking forward
+static int ffmpeg_seek_ts( hb_stream_t *stream, int64_t ts )
+{
+ AVFormatContext *ic = stream->ffmpeg_ic;
+ int64_t pos;
+
+ pos = ts * AV_TIME_BASE / 90000;
+ stream->need_keyframe = 1;
+ // Seek to the nearest timestamp before that requested where
+ // there is an I-frame
+ return av_seek_frame( ic, -1, pos, AVSEEK_FLAG_BACKWARD );
+}
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