/*****************************************************************************
* ps.h: Program Stream demuxer helper
*****************************************************************************
- * Copyright (C) 2004 VideoLAN
+ * Copyright (C) 2004 the VideoLAN team
* $Id$
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* 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.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#define PS_TK_COUNT (512 - 0xc0)
-#define PS_ID_TO_TK( id ) ((id) <= 0xff ? (id) - 0xc0 : ((id)&0xff) + (256 - 0xc0))
+#define PS_ID_TO_TK( id ) ((id) <= 0xff ? (id) - 0xc0 : \
+ ((id)&0xff) + (256 - 0xc0))
+
+typedef struct ps_psm_t ps_psm_t;
+static inline int ps_id_to_type( ps_psm_t *, int );
+static inline uint8_t *ps_id_to_lang( ps_psm_t *, int );
typedef struct
{
vlc_bool_t b_seen;
int i_skip;
+ int i_id;
es_out_id_t *es;
es_format_t fmt;
+ mtime_t i_first_pts;
+ mtime_t i_last_pts;
+
} ps_track_t;
/* Init a set of track */
{
tk[i].b_seen = VLC_FALSE;
tk[i].i_skip = 0;
+ tk[i].i_id = 0;
tk[i].es = NULL;
+ tk[i].i_first_pts = -1;
+ tk[i].i_last_pts = -1;
es_format_Init( &tk[i].fmt, UNKNOWN_ES, 0 );
}
}
/* From id fill i_skip and es_format_t */
-static inline int ps_track_fill( ps_track_t *tk, int i_id )
+static inline int ps_track_fill( ps_track_t *tk, ps_psm_t *p_psm, int i_id )
{
tk->i_skip = 0;
+ tk->i_id = i_id;
if( ( i_id&0xff00 ) == 0xbd00 )
{
if( ( i_id&0xf8 ) == 0x88 )
}
else
{
- if( ( i_id&0xf0 ) == 0xe0 )
+ int i_type = ps_id_to_type( p_psm , i_id );
+
+ es_format_Init( &tk->fmt, UNKNOWN_ES, 0 );
+
+ if( (i_id&0xf0) == 0xe0 && i_type == 0x1b )
+ {
+ es_format_Init( &tk->fmt, VIDEO_ES, VLC_FOURCC('h','2','6','4') );
+ }
+ else if( (i_id&0xf0) == 0xe0 && i_type == 0x10 )
+ {
+ es_format_Init( &tk->fmt, VIDEO_ES, VLC_FOURCC('m','p','4','v') );
+ }
+ else if( (i_id&0xf0) == 0xe0 && i_type == 0x02 )
{
es_format_Init( &tk->fmt, VIDEO_ES, VLC_FOURCC('m','p','g','v') );
}
- else if( ( i_id&0xe0 ) == 0xc0 )
+ else if( ( i_id&0xe0 ) == 0xc0 && i_type == 0x0f )
+ {
+ es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('m','p','4','a') );
+ }
+ else if( ( i_id&0xe0 ) == 0xc0 && i_type == 0x03 )
{
es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('m','p','g','a') );
}
- else
+
+ if( tk->fmt.i_cat == UNKNOWN_ES && ( i_id&0xf0 ) == 0xe0 )
{
- es_format_Init( &tk->fmt, UNKNOWN_ES, 0 );
- return VLC_EGENERIC;
+ es_format_Init( &tk->fmt, VIDEO_ES, VLC_FOURCC('m','p','g','v') );
+ }
+ else if( tk->fmt.i_cat == UNKNOWN_ES && ( i_id&0xe0 ) == 0xc0 )
+ {
+ es_format_Init( &tk->fmt, AUDIO_ES, VLC_FOURCC('m','p','g','a') );
}
+ else if( tk->fmt.i_cat == UNKNOWN_ES ) return VLC_EGENERIC;
}
/* PES packets usually contain truncated frames */
tk->fmt.b_packetized = VLC_FALSE;
+ if( ps_id_to_lang( p_psm , i_id ) )
+ {
+ tk->fmt.psz_language = malloc( 4 );
+ memcpy( tk->fmt.psz_language, ps_id_to_lang( p_psm , i_id ), 3 );
+ tk->fmt.psz_language[3] = 0;
+ }
+
return VLC_SUCCESS;
}
}
/* Parse a SYSTEM PES */
-static inline int ps_pkt_parse_system( block_t *p_pkt,
+static inline int ps_pkt_parse_system( block_t *p_pkt, ps_psm_t *p_psm,
ps_track_t tk[PS_TK_COUNT] )
{
uint8_t *p = &p_pkt->p_buffer[6 + 3 + 1 + 1 + 1];
+ /* System header is not useable if it references private streams (0xBD)
+ * or 'all audio streams' (0xB8) or 'all video streams' (0xB9) */
while( p < &p_pkt->p_buffer[p_pkt->i_buffer] )
{
- /* msg_Dbg( p_demux, " SYSTEM_START_CODE: id=0x%x", p[0] ); */
- if( p[0] != 0xbd )
+ int i_id = p[0];
+
+ /* fprintf( stderr, " SYSTEM_START_CODEEE: id=0x%x\n", p[0] ); */
+ if( p[0] >= 0xBC || p[0] == 0xB8 || p[0] == 0xB9 ) p += 2;
+ p++;
+
+ if( i_id >= 0xc0 )
{
- int i_id = p[0];
int i_tk = PS_ID_TO_TK( i_id );
if( !tk[i_tk].b_seen )
{
- if( !ps_track_fill( &tk[i_tk], i_id ) )
+ if( !ps_track_fill( &tk[i_tk], p_psm, i_id ) )
{
tk[i_tk].b_seen = VLC_TRUE;
}
}
- p += 2;
}
- p++;
}
return VLC_SUCCESS;
}
return VLC_SUCCESS;
}
+
+/* Program stream map handling */
+typedef struct ps_es_t
+{
+ int i_type;
+ int i_id;
+
+ int i_descriptor;
+ uint8_t *p_descriptor;
+
+ /* Language is iso639-2T */
+ uint8_t lang[3];
+
+} ps_es_t;
+
+struct ps_psm_t
+{
+ int i_version;
+
+ int i_es;
+ ps_es_t **es;
+};
+
+static inline int ps_id_to_type( ps_psm_t *p_psm, int i_id )
+{
+ int i;
+ for( i = 0; p_psm && i < p_psm->i_es; i++ )
+ {
+ if( p_psm->es[i]->i_id == i_id ) return p_psm->es[i]->i_type;
+ }
+ return 0;
+}
+
+static inline uint8_t *ps_id_to_lang( ps_psm_t *p_psm, int i_id )
+{
+ int i;
+ for( i = 0; p_psm && i < p_psm->i_es; i++ )
+ {
+ if( p_psm->es[i]->i_id == i_id ) return p_psm->es[i]->lang;
+ }
+ return 0;
+}
+
+static inline void ps_psm_init( ps_psm_t *p_psm )
+{
+ p_psm->i_version = 0xFFFF;
+ p_psm->i_es = 0;
+ p_psm->es = 0;
+}
+
+static inline void ps_psm_destroy( ps_psm_t *p_psm )
+{
+ while( p_psm->i_es-- )
+ {
+ if( p_psm->es[p_psm->i_es]->i_descriptor )
+ free( p_psm->es[p_psm->i_es]->p_descriptor );
+ free( p_psm->es[p_psm->i_es] );
+ }
+ if( p_psm->es ) free( p_psm->es );
+
+ p_psm->es = 0;
+ p_psm->i_es = 0;
+}
+
+static inline int ps_psm_fill( ps_psm_t *p_psm, block_t *p_pkt,
+ ps_track_t tk[PS_TK_COUNT], es_out_t *out )
+{
+ int i_buffer = p_pkt->i_buffer;
+ uint8_t *p_buffer = p_pkt->p_buffer;
+ int i_length, i_version, i_info_length, i_esm_length, i_es_base, i;
+
+ if( !p_psm || p_buffer[3] != 0xbc ) return VLC_EGENERIC;
+
+ i_length = (uint16_t)(p_buffer[4] << 8) + p_buffer[5] + 6;
+ if( i_length > i_buffer ) return VLC_EGENERIC;
+
+ //i_current_next_indicator = (p_buffer[6] && 0x01);
+ i_version = (p_buffer[6] && 0xf8);
+
+ if( p_psm->i_version == i_version ) return VLC_EGENERIC;
+
+ ps_psm_destroy( p_psm );
+
+ i_info_length = (uint16_t)(p_buffer[8] << 8) + p_buffer[9];
+ if( i_info_length + 10 > i_length ) return VLC_EGENERIC;
+
+ /* Elementary stream map */
+ i_esm_length = (uint16_t)(p_buffer[ 10 + i_info_length ] << 8) +
+ p_buffer[ 11 + i_info_length];
+ i_es_base = 12 + i_info_length;
+
+ while( i_es_base + 4 < i_length )
+ {
+ ps_es_t es;
+ es.lang[0] = es.lang[1] = es.lang[2] = 0;
+
+ es.i_type = p_buffer[ i_es_base ];
+ es.i_id = p_buffer[ i_es_base + 1 ];
+ i_info_length = (uint16_t)(p_buffer[ i_es_base + 2 ] << 8) +
+ p_buffer[ i_es_base + 3 ];
+
+ if( i_es_base + 4 + i_info_length > i_length ) break;
+
+ es.p_descriptor = 0;
+ es.i_descriptor = i_info_length;
+ if( i_info_length > 0 )
+ {
+ int i = 0;
+
+ es.p_descriptor = malloc( i_info_length );
+ memcpy( es.p_descriptor, p_buffer + i_es_base + 4, i_info_length);
+
+ while( i <= es.i_descriptor - 2 )
+ {
+ /* Look for the ISO639 language descriptor */
+ if( es.p_descriptor[i] != 0x0a )
+ {
+ i += es.p_descriptor[i+1] + 2;
+ continue;
+ }
+
+ if( i <= es.i_descriptor - 6 )
+ {
+ es.lang[0] = es.p_descriptor[i+2];
+ es.lang[1] = es.p_descriptor[i+3];
+ es.lang[2] = es.p_descriptor[i+4];
+ }
+ break;
+ }
+ }
+
+ p_psm->es = realloc( p_psm->es, sizeof(ps_es_t *) * (p_psm->i_es+1) );
+ p_psm->es[p_psm->i_es] = malloc( sizeof(ps_es_t) );
+ *p_psm->es[p_psm->i_es++] = es;
+ i_es_base += 4 + i_info_length;
+ }
+
+ /* TODO: CRC */
+
+ p_psm->i_version = i_version;
+
+ /* Check/Modify our existing tracks */
+ for( i = 0; i < PS_TK_COUNT; i++ )
+ {
+ ps_track_t tk_tmp;
+
+ if( !tk[i].b_seen || !tk[i].es ) continue;
+
+ if( ps_track_fill( &tk_tmp, p_psm, tk[i].i_id ) != VLC_SUCCESS )
+ continue;
+
+ if( tk_tmp.fmt.i_codec == tk[i].fmt.i_codec ) continue;
+
+ es_out_Del( out, tk[i].es );
+ tk[i] = tk_tmp;
+ tk[i].b_seen = VLC_TRUE;
+ tk[i].es = es_out_Add( out, &tk[i].fmt );
+ }
+
+ return VLC_SUCCESS;
+}
projects / vlc / blobdiff