/* GStreamer * Copyright (C) <1999> Erik Walthinsen * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /*#define GST_DEBUG_ENABLED*/ #include /* elementfactory information */ static GstElementDetails mpeg_demux_details = { "MPEG Demuxer", "Codec/Demuxer", "Demultiplexes MPEG1 and MPEG2 System Streams", VERSION, "Erik Walthinsen \n" "Wim Taymans ", "(C) 1999", }; /* MPEG2Demux signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, ARG_BIT_RATE, ARG_MPEG2, /* FILL ME */ }; GST_PAD_TEMPLATE_FACTORY (sink_factory, "sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_CAPS_NEW ( "mpeg_demux_sink", "video/mpeg", "mpegversion", GST_PROPS_INT_RANGE (1, 2), "systemstream", GST_PROPS_BOOLEAN (TRUE) ) ); GST_PAD_TEMPLATE_FACTORY (audio_factory, "audio_%02d", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_CAPS_NEW ( "mpeg_demux_audio", "audio/mp3", NULL ) ); GST_PAD_TEMPLATE_FACTORY (video_mpeg1_factory, "video_%02d", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_CAPS_NEW ( "mpeg_demux_video_mpeg1", "video/mpeg", "mpegversion", GST_PROPS_INT (1), "systemstream", GST_PROPS_BOOLEAN (FALSE) ) ); GST_PAD_TEMPLATE_FACTORY (video_mpeg2_factory, "video_%02d", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_CAPS_NEW ( "mpeg_demux_video_mpeg2", "video/mpeg", "mpegversion", GST_PROPS_INT (2), "systemstream", GST_PROPS_BOOLEAN (FALSE) ) ); GST_PAD_TEMPLATE_FACTORY (private1_factory, "private_stream_1_%02d", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_CAPS_NEW ( "mpeg_demux_private1", "audio/a52", NULL ) ); GST_PAD_TEMPLATE_FACTORY (private2_factory, "private_stream_2", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_CAPS_NEW ( "mpeg_demux_private2", "unknown/unknown", NULL ) ); GST_PAD_TEMPLATE_FACTORY (subtitle_factory, "subtitle_stream_%d", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_CAPS_NEW ( "mpeg_demux_subtitle", "video/mpeg", NULL ) ); static void gst_mpeg_demux_class_init (GstMPEGDemuxClass *klass); static void gst_mpeg_demux_init (GstMPEGDemux *mpeg_demux); static gboolean gst_mpeg_demux_parse_packhead (GstMPEGParse *mpeg_parse, GstBuffer *buffer); static gboolean gst_mpeg_demux_parse_syshead (GstMPEGParse *mpeg_parse, GstBuffer *buffer); static gboolean gst_mpeg_demux_parse_packet (GstMPEGParse *mpeg_parse, GstBuffer *buffer); static gboolean gst_mpeg_demux_parse_pes (GstMPEGParse *mpeg_parse, GstBuffer *buffer); static void gst_mpeg_demux_send_data (GstMPEGParse *mpeg_parse, GstData *data, GstClockTime time); static void gst_mpeg_demux_handle_discont (GstMPEGParse *mpeg_parse); static GstElementStateReturn gst_mpeg_demux_change_state (GstElement *element); static GstMPEGParseClass *parent_class = NULL; /*static guint gst_mpeg_demux_signals[LAST_SIGNAL] = { 0 };*/ GType mpeg_demux_get_type (void) { static GType mpeg_demux_type = 0; if (!mpeg_demux_type) { static const GTypeInfo mpeg_demux_info = { sizeof(GstMPEGDemuxClass), NULL, NULL, (GClassInitFunc)gst_mpeg_demux_class_init, NULL, NULL, sizeof(GstMPEGDemux), 0, (GInstanceInitFunc)gst_mpeg_demux_init, }; mpeg_demux_type = g_type_register_static(GST_TYPE_MPEG_PARSE, "GstMPEGDemux", &mpeg_demux_info, 0); } return mpeg_demux_type; } static void gst_mpeg_demux_class_init (GstMPEGDemuxClass *klass) { GstMPEGParseClass *mpeg_parse_class; GstElementClass *gstelement_class; parent_class = g_type_class_ref (GST_TYPE_MPEG_PARSE); mpeg_parse_class = (GstMPEGParseClass *) klass; gstelement_class = (GstElementClass *) klass; gstelement_class->change_state = gst_mpeg_demux_change_state; mpeg_parse_class->parse_packhead = gst_mpeg_demux_parse_packhead; mpeg_parse_class->parse_syshead = gst_mpeg_demux_parse_syshead; mpeg_parse_class->parse_packet = gst_mpeg_demux_parse_packet; mpeg_parse_class->parse_pes = gst_mpeg_demux_parse_pes; mpeg_parse_class->send_data = gst_mpeg_demux_send_data; mpeg_parse_class->handle_discont = gst_mpeg_demux_handle_discont; } static void gst_mpeg_demux_init (GstMPEGDemux *mpeg_demux) { gint i; GstMPEGParse *mpeg_parse = GST_MPEG_PARSE (mpeg_demux); gst_element_remove_pad (GST_ELEMENT (mpeg_parse), mpeg_parse->sinkpad); mpeg_parse->sinkpad = gst_pad_new_from_template( GST_PAD_TEMPLATE_GET (sink_factory), "sink"); gst_element_add_pad (GST_ELEMENT (mpeg_parse), mpeg_parse->sinkpad); gst_element_remove_pad (GST_ELEMENT (mpeg_parse), mpeg_parse->srcpad); /* i think everything is already zero'd, but oh well*/ for (i=0;iprivate_1_pad[i] = NULL; mpeg_demux->private_1_PTS[i] = 0; } for (i=0;isubtitle_pad[i] = NULL; mpeg_demux->subtitle_offset[i] = 0; } mpeg_demux->private_2_pad = NULL; mpeg_demux->private_2_offset = 0; for (i=0;ivideo_pad[i] = NULL; mpeg_demux->video_PTS[i] = 0; } for (i=0;iaudio_pad[i] = NULL; mpeg_demux->audio_PTS[i] = 0; } GST_FLAG_SET (mpeg_demux, GST_ELEMENT_EVENT_AWARE); } static void gst_mpeg_demux_send_data (GstMPEGParse *mpeg_parse, GstData *data, GstClockTime time) { //GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (mpeg_parse); if (GST_IS_BUFFER (data)) { gst_buffer_unref (GST_BUFFER (data)); } else { GstEvent *event = GST_EVENT (data); switch (GST_EVENT_TYPE (event)) { default: //g_print ("demux: default event %d\n", GST_EVENT_TYPE (event)); gst_pad_event_default (mpeg_parse->sinkpad, event); break; } } } static void gst_mpeg_demux_handle_discont (GstMPEGParse *mpeg_parse) { GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (mpeg_parse); gint i; gint64 current_time = MPEGTIME_TO_GSTTIME (mpeg_parse->current_scr); GST_DEBUG (GST_CAT_EVENT, "mpegdemux: discont %llu\n", current_time); for (i=0;ivideo_pad[i] && GST_PAD_IS_CONNECTED (mpeg_demux->video_pad[i])) { GstEvent *discont; discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, current_time, NULL); mpeg_demux->video_PTS[i] = mpeg_parse->current_scr; gst_pad_push (mpeg_demux->video_pad[i], GST_BUFFER (discont)); } if (mpeg_demux->audio_pad[i] && GST_PAD_IS_CONNECTED (mpeg_demux->audio_pad[i])) { GstEvent *discont; discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, current_time, NULL); mpeg_demux->audio_PTS[i] = mpeg_parse->current_scr; gst_pad_push (mpeg_demux->audio_pad[i], GST_BUFFER (discont)); } } } static gboolean gst_mpeg_demux_parse_packhead (GstMPEGParse *mpeg_parse, GstBuffer *buffer) { guint8 *buf; parent_class->parse_packhead (mpeg_parse, buffer); GST_DEBUG (0, "mpeg_demux: in parse_packhead"); buf = GST_BUFFER_DATA (buffer); /* do something usefull here */ return TRUE; } static gboolean gst_mpeg_demux_parse_syshead (GstMPEGParse *mpeg_parse, GstBuffer *buffer) { GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (mpeg_parse); guint16 header_length; guchar *buf; GST_DEBUG (0, "mpeg_demux: in parse_syshead"); buf = GST_BUFFER_DATA (buffer); buf += 4; header_length = GUINT16_FROM_BE (*(guint16 *) buf); GST_DEBUG (0, "mpeg_demux: header_length %d", header_length); buf += 2; /* marker:1==1 ! rate_bound:22 | marker:1==1*/ buf += 3; /* audio_bound:6==1 ! fixed:1 | constrained:1*/ buf += 1; /* audio_lock:1 | video_lock:1 | marker:1==1 | video_bound:5 */ buf += 1; /* apacket_rate_restriction:1 | reserved:7==0x7F */ buf += 1; if (!GST_MPEG_PARSE_IS_MPEG2 (mpeg_demux)) { gint stream_count = (header_length - 6) / 3; gint i, j=0; GST_DEBUG (0, "mpeg_demux::parse_syshead: number of streams=%d ", stream_count); for (i = 0; i < stream_count; i++) { gint stream_num; guint8 stream_id; gboolean STD_buffer_bound_scale; guint16 STD_buffer_size_bound; guint32 buf_byte_size_bound; gchar *name = NULL; GstPad **outpad = NULL; GstPadTemplate *newtemp = NULL; stream_id = *buf++; if (!(stream_id & 0x80)) { GST_DEBUG (0, "mpeg_demux::parse_syshead: error in system header length"); return FALSE; } /* check marker bits */ if ((*buf & 0xC0) != 0xC0) { GST_DEBUG (0, "mpeg_demux::parse_syshead: expecting placeholder bit values '11' after stream id\n"); return FALSE; } STD_buffer_bound_scale = *buf & 0x20; STD_buffer_size_bound = (*buf++ & 0x1F) << 8; STD_buffer_size_bound |= *buf++; if (STD_buffer_bound_scale == 0) { buf_byte_size_bound = STD_buffer_size_bound * 128; } else { buf_byte_size_bound = STD_buffer_size_bound * 1024; } /* private_stream_1 */ if (stream_id == 0xBD) { name = NULL; outpad = NULL; } /* private_stream_2 */ else if (stream_id == 0xBF) { name = g_strdup_printf ("private_stream_2"); stream_num = 0; outpad = &mpeg_demux->private_2_pad; newtemp = GST_PAD_TEMPLATE_GET (private2_factory); } /* Audio */ else if ((stream_id >= 0xC0) && (stream_id <= 0xDF)) { name = g_strdup_printf ("audio_%02d", stream_id & 0x1F); stream_num = stream_id & 0x1F; outpad = &mpeg_demux->audio_pad[stream_num]; newtemp = GST_PAD_TEMPLATE_GET (audio_factory); } /* Video */ else if ((stream_id >= 0xE0) && (stream_id <= 0xEF)) { name = g_strdup_printf ("video_%02d", stream_id & 0x0F); stream_num = stream_id & 0x0F; outpad = &mpeg_demux->video_pad[stream_num]; if (!GST_MPEG_PARSE_IS_MPEG2 (mpeg_demux)) { newtemp = GST_PAD_TEMPLATE_GET (video_mpeg1_factory); } else { newtemp = GST_PAD_TEMPLATE_GET (video_mpeg2_factory); } } GST_DEBUG (0, "mpeg_demux::parse_syshead: stream ID 0x%02X (%s)", stream_id, name); GST_DEBUG (0, "mpeg_demux::parse_syshead: STD_buffer_bound_scale %d", STD_buffer_bound_scale); GST_DEBUG (0, "mpeg_demux::parse_syshead: STD_buffer_size_bound %d or %d bytes", STD_buffer_size_bound, buf_byte_size_bound); /* create the pad and add it to self if it does not yet exist * this should trigger the NEW_PAD signal, which should be caught by * the app and used to attach to desired streams. */ if (outpad && *outpad == NULL) { *outpad = gst_pad_new_from_template (newtemp, name); gst_pad_try_set_caps (*outpad, gst_pad_get_pad_template_caps (*outpad)); gst_pad_set_event_function (*outpad, gst_mpeg_parse_handle_src_event); gst_pad_set_query_function (*outpad, gst_mpeg_parse_handle_src_query); gst_element_add_pad (GST_ELEMENT (mpeg_demux), (*outpad)); if (GST_PAD_IS_CONNECTED (*outpad)) { GstEvent *event; gint64 current_time = MPEGTIME_TO_GSTTIME (mpeg_parse->current_scr); event = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, current_time, NULL); gst_pad_push (*outpad, GST_BUFFER (event)); } } else { /* we won't be needing this. */ if (name) g_free (name); } mpeg_demux->STD_buffer_info[j].stream_id = stream_id; mpeg_demux->STD_buffer_info[j].STD_buffer_bound_scale = STD_buffer_bound_scale; mpeg_demux->STD_buffer_info[j].STD_buffer_size_bound = STD_buffer_size_bound; j++; } } return TRUE; } static gboolean gst_mpeg_demux_parse_packet (GstMPEGParse *mpeg_parse, GstBuffer *buffer) { GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (mpeg_parse); guint8 id; guint16 headerlen; guint16 packet_length; gboolean STD_buffer_bound_scale; guint16 STD_buffer_size_bound; guint64 dts; guint8 ps_id_code; gint64 pts = -1; guint16 datalen; GstPad **outpad = NULL; GstBuffer *outbuf; guint8 *buf, *basebuf; GST_DEBUG (0,"mpeg_demux::parse_packet: in parse_packet"); basebuf = buf = GST_BUFFER_DATA (buffer); id = *(buf+3); buf += 4; /* start parsing */ packet_length = GUINT16_FROM_BE (*((guint16 *)buf)); GST_DEBUG (0,"mpeg_demux: got packet_length %d", packet_length); headerlen = 2; buf += 2; /* loop through looping for stuffing bits, STD, PTS, DTS, etc */ do { guint8 bits = *buf++; /* stuffing bytes */ switch (bits & 0xC0) { case 0xC0: if (bits == 0xff) { GST_DEBUG (0,"mpeg_demux::parse_packet: have stuffing byte"); } else { GST_DEBUG (0,"mpeg_demux::parse_packet: expected stuffing byte"); } headerlen++; break; case 0x40: GST_DEBUG (0,"mpeg_demux::parse_packet: have STD"); STD_buffer_bound_scale = bits & 0x20; STD_buffer_size_bound = (bits & 0x1F) << 8; STD_buffer_size_bound |= *buf++; headerlen += 2; break; case 0x00: switch (bits & 0x30) { case 0x20: /* pts:3 ! 1 ! pts:15 ! 1 | pts:15 ! 1 */ pts = (bits & 0x0E) << 29; pts |= *buf++ << 22; pts |= (*buf++ & 0xFE) << 14; pts |= *buf++ << 7; pts |= (*buf++ & 0xFE) >> 1; GST_DEBUG (0,"mpeg_demux::parse_packet: PTS = %llu", pts); headerlen += 5; goto done; case 0x30: /* pts:3 ! 1 ! pts:15 ! 1 | pts:15 ! 1 */ pts = (bits & 0x0E) << 29; pts |= *buf++ << 22; pts |= (*buf++ & 0xFE) << 14; pts |= *buf++ << 7; pts |= (*buf++ & 0xFE) >> 1; /* sync:4 ! pts:3 ! 1 ! pts:15 ! 1 | pts:15 ! 1 */ dts = (*buf++ & 0x0E) << 29; dts |= *buf++ << 22; dts |= (*buf++ & 0xFE) << 14; dts |= *buf++ << 7; dts |= (*buf++ & 0xFE) >> 1; GST_DEBUG (0,"mpeg_demux::parse_packet: PTS = %llu, DTS = %llu", pts, dts); headerlen += 10; goto done; case 0x00: GST_DEBUG (0,"mpeg_demux::parse_packet: have no pts/dts"); GST_DEBUG (0,"mpeg_demux::parse_packet: got trailer bits %x", (bits & 0x0f)); if ((bits & 0x0f) != 0xf) { GST_DEBUG (0,"mpeg_demux::parse_packet: not a valid packet time sequence"); return FALSE; } headerlen++; default: goto done; } default: goto done; } } while (1); GST_DEBUG (0,"mpeg_demux::parse_packet: done with header loop"); done: /* calculate the amount of real data in this packet */ datalen = packet_length - headerlen+2; GST_DEBUG (0,"mpeg_demux::parse_packet: headerlen is %d, datalen is %d", headerlen,datalen); /* private_stream_1 */ if (id == 0xBD) { /* first find the track code */ ps_id_code = *(basebuf + headerlen); /* make sure it's valid */ if ((ps_id_code >= 0x80) && (ps_id_code <= 0x87)) { GST_DEBUG (0,"mpeg_demux::parse_packet: 0x%02X: we have a private_stream_1 (AC3) packet, track %d", id, ps_id_code - 0x80); outpad = &mpeg_demux->private_1_pad[ps_id_code - 0x80]; /* scrap first 4 bytes (so-called "mystery AC3 tag") */ headerlen += 4; datalen -= 4; } /* private_stream_1 */ } else if (id == 0xBF) { GST_DEBUG (0,"mpeg_demux::parse_packet: 0x%02X: we have a private_stream_2 packet", id); outpad = &mpeg_demux->private_2_pad; /* audio */ } else if ((id >= 0xC0) && (id <= 0xDF)) { GST_DEBUG (0,"mpeg_demux::parse_packet: 0x%02X: we have an audio packet", id); outpad = &mpeg_demux->audio_pad[id & 0x1F]; /* video */ } else if ((id >= 0xE0) && (id <= 0xEF)) { GST_DEBUG (0,"mpeg_demux::parse_packet: 0x%02X: we have a video packet", id); outpad = &mpeg_demux->video_pad[id & 0x0F]; if (pts == -1) pts = mpeg_demux->video_PTS[id & 0x1F]; else mpeg_demux->video_PTS[id & 0x1F] = pts; } /* if we don't know what it is, bail */ if (outpad == NULL) { GST_DEBUG (0,"mpeg_demux::parse_packet: unknown packet id 0x%02X !!", id); return FALSE; } /* FIXME, this should be done in parse_syshead */ if ((*outpad) == NULL) { GST_DEBUG (0,"mpeg_demux::parse_packet: unexpected packet id 0x%02X!!", id); return FALSE; } /* create the buffer and send it off to the Other Side */ if (GST_PAD_IS_CONNECTED(*outpad) && datalen > 0) { /* if this is part of the buffer, create a subbuffer */ GST_DEBUG (0,"mpeg_demux::parse_packet: creating subbuffer len %d", datalen); outbuf = gst_buffer_create_sub (buffer, headerlen+4, datalen); if (pts != -1) { GST_BUFFER_TIMESTAMP (outbuf) = (pts * GST_SECOND)/90000LL; } else { GST_BUFFER_TIMESTAMP (outbuf) = -1LL; } GST_DEBUG (0,"mpeg_demux::parse_packet: pushing buffer of len %d id %d, ts %lld", datalen, id, GST_BUFFER_TIMESTAMP (outbuf)); gst_pad_push ((*outpad), outbuf); } return TRUE; } static gboolean gst_mpeg_demux_parse_pes (GstMPEGParse *mpeg_parse, GstBuffer *buffer) { GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (mpeg_parse); guint8 id; gint64 pts = -1; guint16 packet_length; guint8 header_data_length = 0; guint16 datalen; guint16 headerlen; guint8 ps_id_code = 0x80; GstPad **outpad = NULL; GstBuffer *outbuf; GstPadTemplate *newtemp = NULL; guint8 *buf, *basebuf; GST_DEBUG (0,"mpeg_demux: in parse_pes"); basebuf = buf = GST_BUFFER_DATA (buffer); id = *(buf+3); buf += 4; /* start parsing */ packet_length = GUINT16_FROM_BE (*((guint16 *)buf)); GST_DEBUG (0,"mpeg_demux: got packet_length %d", packet_length); buf += 2; /* we don't operate on: program_stream_map, padding_stream, */ /* private_stream_2, ECM, EMM, or program_stream_directory */ if ((id != 0xBC) && (id != 0xBE) && (id != 0xBF) && (id != 0xF0) && (id != 0xF1) && (id != 0xFF)) { guchar flags1 = *buf++; guchar flags2 = *buf++; if ((flags1 & 0xC0) != 0x80) { return FALSE; } header_data_length = *buf++; GST_DEBUG (0,"mpeg_demux: header_data_length is %d",header_data_length); /* check for PTS */ if ((flags2 & 0x80)) { /*if ((flags2 & 0x80) && id == 0xe0) { */ pts = (*buf++ & 0x0E) << 29; pts |= *buf++ << 22; pts |= (*buf++ & 0xFE) << 14; pts |= *buf++ << 7; pts |= (*buf++ & 0xFE) >> 1; GST_DEBUG (0, "mpeg_demux::parse_packet: %x PTS = %llu", id, (pts*GST_SECOND)/90000LL); } if ((flags2 & 0x40)) { GST_DEBUG (0, "mpeg_demux::parse_packet: %x DTS found", id); buf += 5; } if ((flags2 & 0x20)) { GST_DEBUG (0, "mpeg_demux::parse_packet: %x ESCR found", id); buf += 6; } if ((flags2 & 0x10)) { guint32 es_rate; es_rate = (*buf++ & 0x07) << 14; es_rate |= (*buf++ ) << 7; es_rate |= (*buf++ & 0xFE) >> 1; GST_DEBUG (0, "mpeg_demux::parse_packet: %x ES Rate found", id); } /* FIXME: lots of PES parsing missing here... */ } /* calculate the amount of real data in this PES packet */ /* constant is 2 bytes packet_length, 2 bytes of bits, 1 byte header len */ headerlen = 5 + header_data_length; /* constant is 2 bytes of bits, 1 byte header len */ datalen = packet_length - (3 + header_data_length); GST_DEBUG (0,"mpeg_demux: headerlen is %d, datalen is %d", headerlen, datalen); /* private_stream_1 */ if (id == 0xBD) { /* first find the track code */ ps_id_code = *(basebuf + headerlen + 4); /* make sure it's valid */ if ((ps_id_code >= 0x80) && (ps_id_code <= 0x87)) { GST_DEBUG (0,"mpeg_demux: we have a private_stream_1 (AC3) packet, track %d", ps_id_code - 0x80); outpad = &mpeg_demux->private_1_pad[ps_id_code - 0x80]; /* scrap first 4 bytes (so-called "mystery AC3 tag") */ headerlen += 4; datalen -= 4; if (pts == -1) pts = mpeg_demux->private_1_PTS[ps_id_code - 0x80]; else mpeg_demux->private_1_PTS[ps_id_code - 0x80] = pts; } else if ((ps_id_code >= 0x20) && (ps_id_code <= 0x2f)) { GST_DEBUG (0,"mpeg_demux: we have a subtitle_stream packet, track %d", ps_id_code - 0x20); outpad = &mpeg_demux->subtitle_pad[ps_id_code - 0x20]; headerlen += 1; datalen -= 1; } /* private_stream_1 */ } else if (id == 0xBF) { GST_DEBUG (0,"mpeg_demux: we have a private_stream_2 packet"); outpad = &mpeg_demux->private_2_pad; /* audio */ } else if ((id >= 0xC0) && (id <= 0xDF)) { GST_DEBUG (0,"mpeg_demux: we have an audio packet"); outpad = &mpeg_demux->audio_pad[id - 0xC0]; if (pts == -1) pts = mpeg_demux->audio_PTS[id & 0x1F]; else mpeg_demux->audio_PTS[id & 0x1F] = pts; /* video */ } else if ((id >= 0xE0) && (id <= 0xEF)) { GST_DEBUG (0,"mpeg_demux: we have a video packet"); outpad = &mpeg_demux->video_pad[id - 0xE0]; if (pts == -1) pts = mpeg_demux->video_PTS[id & 0x1F]; else mpeg_demux->video_PTS[id & 0x1F] = pts; } /* if we don't know what it is, bail */ if (outpad == NULL) return TRUE; /* create the pad and add it if we don't already have one. */ /* this should trigger the NEW_PAD signal, which should be caught by */ /* the app and used to attach to desired streams. */ if ((*outpad) == NULL) { gchar *name = NULL; /* we have to name the stream approriately */ if (id == 0xBD) { if (ps_id_code >= 0x80 && ps_id_code <= 0x87) { name = g_strdup_printf("private_stream_1.%d",ps_id_code - 0x80); newtemp = GST_PAD_TEMPLATE_GET (private1_factory); } else if (ps_id_code >= 0x20 && ps_id_code <= 0x2f) { name = g_strdup_printf("subtitle_stream_%d",ps_id_code - 0x20); newtemp = GST_PAD_TEMPLATE_GET (subtitle_factory); } else { name = g_strdup_printf("unknown_stream_%d",ps_id_code); } } else if (id == 0xBF) { name = g_strdup ("private_stream_2"); newtemp = GST_PAD_TEMPLATE_GET (private2_factory); } else if ((id >= 0xC0) && (id <= 0xDF)) { name = g_strdup_printf("audio_%02d",id - 0xC0); newtemp = GST_PAD_TEMPLATE_GET (audio_factory); } else if ((id >= 0xE0) && (id <= 0xEF)) { name = g_strdup_printf("video_%02d",id - 0xE0); newtemp = GST_PAD_TEMPLATE_GET (video_mpeg2_factory); } else { name = g_strdup_printf("unknown"); } if (newtemp) { /* create the pad and add it to self */ (*outpad) = gst_pad_new_from_template (newtemp, name); gst_pad_try_set_caps ((*outpad), gst_pad_get_pad_template_caps (*outpad)); gst_pad_set_event_function (*outpad, gst_mpeg_parse_handle_src_event); gst_pad_set_query_function (*outpad, gst_mpeg_parse_handle_src_query); gst_element_add_pad(GST_ELEMENT(mpeg_demux),(*outpad)); } else { g_warning ("mpeg_demux: cannot create pad %s, no template for %02x", name, id); } if (name) g_free (name); } /* create the buffer and send it off to the Other Side */ if (GST_PAD_IS_CONNECTED(*outpad)) { /* if this is part of the buffer, create a subbuffer */ GST_DEBUG (0,"mpeg_demux: creating subbuffer len %d", datalen); outbuf = gst_buffer_create_sub (buffer, headerlen+4, datalen); GST_BUFFER_TIMESTAMP(outbuf) = (pts * GST_SECOND) / 90000LL; gst_pad_push((*outpad),outbuf); } return TRUE; } static GstElementStateReturn gst_mpeg_demux_change_state (GstElement *element) { GstMPEGDemux *mpeg_demux = GST_MPEG_DEMUX (element); gint i; switch (GST_STATE_TRANSITION (element)) { case GST_STATE_READY_TO_PAUSED: break; case GST_STATE_PAUSED_TO_READY: for (i=0;ivideo_PTS[i] = 0; } for (i=0;iaudio_PTS[i] = 0; } break; case GST_STATE_READY_TO_NULL: break; default: break; } return GST_ELEMENT_CLASS (parent_class)->change_state (element); } gboolean gst_mpeg_demux_plugin_init (GModule *module, GstPlugin *plugin) { GstElementFactory *factory; /* this filter needs the bytestream package */ if (!gst_library_load ("gstbytestream")) { gst_info ("mpeg_demux:: could not load support library: 'gstbytestream'\n"); return FALSE; } /* create an elementfactory for the mpeg_demux element */ factory = gst_element_factory_new ("mpegdemux", GST_TYPE_MPEG_DEMUX, &mpeg_demux_details); g_return_val_if_fail (factory != NULL, FALSE); gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (sink_factory)); gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (video_mpeg1_factory)); gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (video_mpeg2_factory)); gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (private1_factory)); gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (private2_factory)); gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (subtitle_factory)); gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (audio_factory)); gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory)); return TRUE; }