/* 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*/ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gstmpegparse.h" #include "gstmpegclock.h" static GstFormat scr_format; GST_DEBUG_CATEGORY_EXTERN (GST_CAT_SEEK); /* elementfactory information */ static GstElementDetails mpeg_parse_details = { "MPEG System Parser", "Codec/Parser", "LGPL", "Parses MPEG1 and MPEG2 System Streams", VERSION, "Erik Walthinsen \n" "Wim Taymans ", "(C) 1999", }; #define CLASS(o) GST_MPEG_PARSE_CLASS (G_OBJECT_GET_CLASS (o)) #define DEFAULT_MAX_DISCONT 10000 /* GstMPEGParse signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, ARG_SYNC, ARG_MAX_DISCONT, ARG_STREAMINFO, /* FILL ME */ }; GST_PAD_TEMPLATE_FACTORY (sink_factory, "sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_CAPS_NEW ( "mpeg_parse_sink", "video/mpeg", "mpegversion", GST_PROPS_INT_RANGE (1, 2), "systemstream", GST_PROPS_BOOLEAN (TRUE) ) ); GST_PAD_TEMPLATE_FACTORY (src_factory, "src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_CAPS_NEW ( "mpeg_parse_src", "video/mpeg", "mpegversion", GST_PROPS_INT_RANGE (1, 2), "systemstream", GST_PROPS_BOOLEAN (TRUE) ) ); static void gst_mpeg_parse_class_init (GstMPEGParseClass *klass); static void gst_mpeg_parse_init (GstMPEGParse *mpeg_parse); static GstElementStateReturn gst_mpeg_parse_change_state (GstElement *element); static void gst_mpeg_parse_set_clock (GstElement *element, GstClock *clock); static GstClock* gst_mpeg_parse_get_clock (GstElement *element); static GstClockTime gst_mpeg_parse_get_time (GstClock *clock, gpointer data); static gboolean gst_mpeg_parse_parse_packhead (GstMPEGParse *mpeg_parse, GstBuffer *buffer); static void gst_mpeg_parse_send_data (GstMPEGParse *mpeg_parse, GstData *data, GstClockTime time); static void gst_mpeg_parse_handle_discont (GstMPEGParse *mpeg_parse); static void gst_mpeg_parse_loop (GstElement *element); static void gst_mpeg_parse_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static void gst_mpeg_parse_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gst_mpeg_parse_set_index (GstElement *element, GstIndex *index); static GstIndex* gst_mpeg_parse_get_index (GstElement *element); static gboolean gst_mpeg_parse_release_locks (GstElement *element); static GstElementClass *parent_class = NULL; /*static guint gst_mpeg_parse_signals[LAST_SIGNAL] = { 0 };*/ GType gst_mpeg_parse_get_type (void) { static GType mpeg_parse_type = 0; if (!mpeg_parse_type) { static const GTypeInfo mpeg_parse_info = { sizeof(GstMPEGParseClass), NULL, NULL, (GClassInitFunc)gst_mpeg_parse_class_init, NULL, NULL, sizeof(GstMPEGParse), 0, (GInstanceInitFunc)gst_mpeg_parse_init, }; mpeg_parse_type = g_type_register_static(GST_TYPE_ELEMENT, "GstMPEGParse", &mpeg_parse_info, 0); } return mpeg_parse_type; } static void gst_mpeg_parse_class_init (GstMPEGParseClass *klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass*)klass; gstelement_class = (GstElementClass*)klass; parent_class = g_type_class_ref(GST_TYPE_ELEMENT); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SYNC, g_param_spec_boolean ("sync", "Sync", "Synchronize on the stream SCR", FALSE, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MAX_DISCONT, g_param_spec_int ("max_discont", "Max Discont", "The maximun allowed SCR discontinuity", 0, G_MAXINT, DEFAULT_MAX_DISCONT, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, ARG_STREAMINFO, g_param_spec_boxed ("streaminfo", "Streaminfo", "Streaminfo", GST_TYPE_CAPS, G_PARAM_READABLE)); gobject_class->get_property = gst_mpeg_parse_get_property; gobject_class->set_property = gst_mpeg_parse_set_property; gstelement_class->change_state = gst_mpeg_parse_change_state; gstelement_class->get_clock = gst_mpeg_parse_get_clock; gstelement_class->set_clock = gst_mpeg_parse_set_clock; gstelement_class->get_index = gst_mpeg_parse_get_index; gstelement_class->set_index = gst_mpeg_parse_set_index; gstelement_class->release_locks = gst_mpeg_parse_release_locks; klass->parse_packhead = gst_mpeg_parse_parse_packhead; klass->parse_syshead = NULL; klass->parse_packet = NULL; klass->parse_pes = NULL; klass->send_data = gst_mpeg_parse_send_data; klass->handle_discont = gst_mpeg_parse_handle_discont; } static void gst_mpeg_parse_init (GstMPEGParse *mpeg_parse) { 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_pad_set_formats_function (mpeg_parse->sinkpad, gst_mpeg_parse_get_src_formats); gst_pad_set_convert_function (mpeg_parse->sinkpad, gst_mpeg_parse_convert_src); mpeg_parse->srcpad = gst_pad_new_from_template( GST_PAD_TEMPLATE_GET (src_factory), "src"); gst_element_add_pad(GST_ELEMENT(mpeg_parse),mpeg_parse->srcpad); gst_pad_set_formats_function (mpeg_parse->srcpad, gst_mpeg_parse_get_src_formats); gst_pad_set_convert_function (mpeg_parse->srcpad, gst_mpeg_parse_convert_src); gst_pad_set_event_mask_function (mpeg_parse->srcpad, gst_mpeg_parse_get_src_event_masks); gst_pad_set_event_function (mpeg_parse->srcpad, gst_mpeg_parse_handle_src_event); gst_pad_set_query_type_function (mpeg_parse->srcpad, gst_mpeg_parse_get_src_query_types); gst_pad_set_query_function (mpeg_parse->srcpad, gst_mpeg_parse_handle_src_query); gst_element_set_loop_function (GST_ELEMENT (mpeg_parse), gst_mpeg_parse_loop); mpeg_parse->packetize = NULL; mpeg_parse->sync = FALSE; mpeg_parse->id = NULL; mpeg_parse->max_discont = DEFAULT_MAX_DISCONT; mpeg_parse->provided_clock = gst_mpeg_clock_new ("MPEGParseClock", gst_mpeg_parse_get_time, mpeg_parse); mpeg_parse->streaminfo = NULL; GST_FLAG_SET (mpeg_parse, GST_ELEMENT_EVENT_AWARE); } static GstClock* gst_mpeg_parse_get_clock (GstElement *element) { /* GstMPEGParse *parse = GST_MPEG_PARSE (element); */ /* return parse->provided_clock; */ return NULL; } static void gst_mpeg_parse_set_clock (GstElement *element, GstClock *clock) { GstMPEGParse *parse = GST_MPEG_PARSE (element); parse->clock = clock; } static GstClockTime gst_mpeg_parse_get_time (GstClock *clock, gpointer data) { GstMPEGParse *parse = GST_MPEG_PARSE (data); return MPEGTIME_TO_GSTTIME (parse->current_scr); } static void gst_mpeg_parse_update_streaminfo (GstMPEGParse *mpeg_parse) { GstProps *props; GstPropsEntry *entry; gboolean mpeg2 = GST_MPEG_PACKETIZE_IS_MPEG2 (mpeg_parse->packetize); GstCaps *caps; props = gst_props_empty_new (); entry = gst_props_entry_new ("mpegversion", GST_PROPS_INT (mpeg2 ? 2 : 1)); gst_props_add_entry (props, (GstPropsEntry *) entry); entry = gst_props_entry_new ("bitrate", GST_PROPS_INT (mpeg_parse->mux_rate * 400)); gst_props_add_entry (props, (GstPropsEntry *) entry); caps = gst_caps_new ("mpeg_streaminfo", "application/x-gst-streaminfo", props); gst_caps_replace_sink (&mpeg_parse->streaminfo, caps); g_object_notify (G_OBJECT (mpeg_parse), "streaminfo"); } static void gst_mpeg_parse_send_data (GstMPEGParse *mpeg_parse, GstData *data, GstClockTime time) { if (GST_IS_EVENT (data)) { GstEvent *event = GST_EVENT (data); switch (GST_EVENT_TYPE (event)) { default: gst_pad_event_default (mpeg_parse->sinkpad, event); break; } } else { if (!GST_PAD_CAPS (mpeg_parse->srcpad)) { gboolean mpeg2 = GST_MPEG_PACKETIZE_IS_MPEG2 (mpeg_parse->packetize); if (gst_pad_try_set_caps (mpeg_parse->srcpad, GST_CAPS_NEW ( "mpeg_parse_src", "video/mpeg", "mpegversion", GST_PROPS_INT (mpeg2 ? 2 : 1), "systemstream", GST_PROPS_BOOLEAN (TRUE), "parsed", GST_PROPS_BOOLEAN (TRUE) )) < 0) { gst_element_error (GST_ELEMENT (mpeg_parse), "could no set source caps"); return; } } GST_BUFFER_TIMESTAMP (data) = time; GST_DEBUG ("current_scr %" G_GINT64_FORMAT, time); if (GST_PAD_IS_USABLE (mpeg_parse->srcpad)) gst_pad_push (mpeg_parse->srcpad, GST_BUFFER (data)); else gst_data_unref (data); } } static void gst_mpeg_parse_handle_discont (GstMPEGParse *mpeg_parse) { GstEvent *event; event = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, MPEGTIME_TO_GSTTIME (mpeg_parse->current_scr), NULL); if (GST_PAD_IS_USABLE (mpeg_parse->srcpad)) gst_pad_push (mpeg_parse->srcpad, GST_BUFFER (event)); else gst_event_unref (event); } static gboolean gst_mpeg_parse_parse_packhead (GstMPEGParse *mpeg_parse, GstBuffer *buffer) { guint8 *buf; guint64 scr, scr_adj, scr_orig; guint32 scr1, scr2; guint32 new_rate; GST_DEBUG ("in parse_packhead"); buf = GST_BUFFER_DATA (buffer); buf += 4; scr1 = GUINT32_FROM_BE (*(guint32*) buf); scr2 = GUINT32_FROM_BE (*(guint32*) (buf+4)); if (GST_MPEG_PACKETIZE_IS_MPEG2 (mpeg_parse->packetize)) { guint32 scr_ext; /* :2=01 ! scr:3 ! marker:1==1 ! scr:15 ! marker:1==1 ! scr:15 */ scr = (scr1 & 0x38000000) << 3; scr |= (scr1 & 0x03fff800) << 4; scr |= (scr1 & 0x000003ff) << 5; scr |= (scr2 & 0xf8000000) >> 27; scr_ext = (scr2 & 0x03fe0000) >> 17; scr = (scr * 300 + scr_ext % 300) / 300; GST_DEBUG ("%" G_GINT64_FORMAT " %d, %08x %08x %" G_GINT64_FORMAT " diff: %" G_GINT64_FORMAT, scr, scr_ext, scr1, scr2, mpeg_parse->bytes_since_scr, scr - mpeg_parse->current_scr); buf += 6; new_rate = (GUINT32_FROM_BE ((*(guint32 *) buf)) & 0xfffffc00) >> 10; } else { scr = (scr1 & 0x0e000000) << 5; scr |= (scr1 & 0x00fffe00) << 6; scr |= (scr1 & 0x000000ff) << 7; scr |= (scr2 & 0xfe000000) >> 25; buf += 5; /* we do this byte by byte because buf[3] might be outside of buf's * memory space */ new_rate = (buf[0] & 0x7f) << 15; new_rate |= buf[1] << 7; new_rate |= buf[2] >> 1; } scr_orig = scr; mpeg_parse->bytes_since_scr = 0; scr_adj = scr + mpeg_parse->adjust; if (mpeg_parse->next_scr == -1) { mpeg_parse->next_scr = scr; } GST_DEBUG ("SCR is %" G_GUINT64_FORMAT " (%" G_GUINT64_FORMAT ") next: %" G_GINT64_FORMAT " (%" G_GINT64_FORMAT ") diff: %" G_GINT64_FORMAT " (%" G_GINT64_FORMAT ")", scr, MPEGTIME_TO_GSTTIME (scr), mpeg_parse->next_scr, MPEGTIME_TO_GSTTIME (mpeg_parse->next_scr), scr - mpeg_parse->next_scr, MPEGTIME_TO_GSTTIME (scr) - MPEGTIME_TO_GSTTIME (mpeg_parse->next_scr)); if (ABS ((gint64)mpeg_parse->next_scr - (gint64)(scr_adj)) > mpeg_parse->max_discont) { GST_DEBUG ("discontinuity detected; expected: %" G_GUINT64_FORMAT " got: %" G_GUINT64_FORMAT " real:%" G_GINT64_FORMAT " adjust:%" G_GINT64_FORMAT, mpeg_parse->next_scr, scr_adj, scr, mpeg_parse->adjust); mpeg_parse->adjust = mpeg_parse->next_scr - scr; scr = mpeg_parse->next_scr; GST_DEBUG ("new adjust: %" G_GINT64_FORMAT, mpeg_parse->adjust); } else { scr = scr_adj; } if (mpeg_parse->index && GST_INDEX_IS_WRITABLE (mpeg_parse->index)) { /* update index if any */ gst_index_add_association (mpeg_parse->index, mpeg_parse->index_id, GST_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_BYTES, GST_BUFFER_OFFSET (buffer), GST_FORMAT_TIME, MPEGTIME_TO_GSTTIME (scr), 0); } mpeg_parse->current_scr = scr; mpeg_parse->scr_pending = FALSE; if (mpeg_parse->mux_rate != new_rate) { mpeg_parse->mux_rate = new_rate; gst_mpeg_parse_update_streaminfo (mpeg_parse); GST_DEBUG ("stream is %1.3fMbs", (mpeg_parse->mux_rate * 400) / 1000000.0); } return TRUE; } static void gst_mpeg_parse_loop (GstElement *element) { GstMPEGParse *mpeg_parse = GST_MPEG_PARSE (element); GstData *data; guint id; gboolean mpeg2; GstClockTime time; data = gst_mpeg_packetize_read (mpeg_parse->packetize); if (!data) return; id = GST_MPEG_PACKETIZE_ID (mpeg_parse->packetize); mpeg2 = GST_MPEG_PACKETIZE_IS_MPEG2 (mpeg_parse->packetize); if (GST_IS_BUFFER (data)) { GstBuffer *buffer = GST_BUFFER (data); GST_DEBUG ("have chunk 0x%02X", id); switch (id) { case 0xb9: break; case 0xba: if (CLASS (mpeg_parse)->parse_packhead) { CLASS (mpeg_parse)->parse_packhead (mpeg_parse, buffer); } break; case 0xbb: if (CLASS (mpeg_parse)->parse_syshead) { CLASS (mpeg_parse)->parse_syshead (mpeg_parse, buffer); } break; default: if (mpeg2 && ((id < 0xBD) || (id > 0xFE))) { g_warning ("******** unknown id 0x%02X", id); } else { if (mpeg2) { if (CLASS (mpeg_parse)->parse_pes) { CLASS (mpeg_parse)->parse_pes (mpeg_parse, buffer); } } else { if (CLASS (mpeg_parse)->parse_packet) { CLASS (mpeg_parse)->parse_packet (mpeg_parse, buffer); } } } } } time = MPEGTIME_TO_GSTTIME (mpeg_parse->current_scr); if (GST_IS_EVENT (data)) { GstEvent *event = GST_EVENT (data); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_DISCONTINUOUS: GST_DEBUG ("event: %d\n", GST_EVENT_TYPE (data)); mpeg_parse->discont_pending = TRUE; mpeg_parse->packetize->resync = TRUE; gst_event_unref (event); return; default: break; } if (CLASS (mpeg_parse)->send_data) CLASS (mpeg_parse)->send_data (mpeg_parse, data, time); else gst_event_unref (event); } else { guint64 size; /* we're not sending data as long as no new SCR was found */ if (mpeg_parse->discont_pending) { if (!mpeg_parse->scr_pending) { if (mpeg_parse->clock && mpeg_parse->sync) { gst_clock_handle_discont (mpeg_parse->clock, MPEGTIME_TO_GSTTIME (mpeg_parse->current_scr)); } if (CLASS (mpeg_parse)->handle_discont) { CLASS (mpeg_parse)->handle_discont (mpeg_parse); } mpeg_parse->discont_pending = FALSE; } else { GST_DEBUG ("waiting for SCR\n"); } gst_buffer_unref (GST_BUFFER (data)); return; } size = GST_BUFFER_SIZE (data); mpeg_parse->bytes_since_scr += size; if (!GST_PAD_CAPS (mpeg_parse->sinkpad)) { gboolean mpeg2 = GST_MPEG_PACKETIZE_IS_MPEG2 (mpeg_parse->packetize); if (gst_pad_try_set_caps (mpeg_parse->sinkpad, GST_CAPS_NEW ( "mpeg_parse_src", "video/mpeg", "mpegversion", GST_PROPS_INT (mpeg2 ? 2 : 1), "systemstream", GST_PROPS_BOOLEAN (TRUE), "parsed", GST_PROPS_BOOLEAN (TRUE) )) < 0) { gst_element_error (GST_ELEMENT (mpeg_parse), "could no set sink caps"); return; } } if (CLASS (mpeg_parse)->send_data) CLASS (mpeg_parse)->send_data (mpeg_parse, data, time); if (mpeg_parse->clock && mpeg_parse->sync && !mpeg_parse->discont_pending) { mpeg_parse->id = gst_clock_new_single_shot_id (mpeg_parse->clock, time); GST_DEBUG ("syncing mpegparse"); gst_element_clock_wait (GST_ELEMENT (mpeg_parse), mpeg_parse->id, NULL); gst_clock_id_free (mpeg_parse->id); mpeg_parse->id = NULL; } if (mpeg_parse->current_scr != -1) { guint64 scr, bss, br; scr = mpeg_parse->current_scr; bss = mpeg_parse->bytes_since_scr; br = mpeg_parse->mux_rate * 50; if (br) { if (GST_MPEG_PACKETIZE_IS_MPEG2 (mpeg_parse->packetize)) { /* * The mpeg spec says something like this, but that doesn't really work: * * mpeg_parse->next_scr = (scr * br + bss * CLOCK_FREQ) / (CLOCK_FREQ + br); */ mpeg_parse->next_scr = scr + (bss * CLOCK_FREQ) / br; } else { /* we are interpolating the scr here */ mpeg_parse->next_scr = scr + (bss * CLOCK_FREQ) / br; } } else { /* no bitrate known */ mpeg_parse->next_scr = scr; } GST_DEBUG ("size: %" G_GINT64_FORMAT ", total since SCR: %" G_GINT64_FORMAT ", next SCR: %" G_GINT64_FORMAT, size, bss, mpeg_parse->next_scr); } } } const GstFormat* gst_mpeg_parse_get_src_formats (GstPad *pad) { static const GstFormat formats[] = { GST_FORMAT_BYTES, GST_FORMAT_TIME, 0 }; return formats; } gboolean gst_mpeg_parse_convert_src (GstPad *pad, GstFormat src_format, gint64 src_value, GstFormat *dest_format, gint64 *dest_value) { gboolean res = TRUE; GstMPEGParse *mpeg_parse = GST_MPEG_PARSE (gst_pad_get_parent (pad)); switch (src_format) { case GST_FORMAT_BYTES: switch (*dest_format) { case GST_FORMAT_DEFAULT: *dest_format = GST_FORMAT_TIME; case GST_FORMAT_TIME: if (mpeg_parse->mux_rate == 0) res = FALSE; else *dest_value = src_value * GST_SECOND / (mpeg_parse->mux_rate * 50); break; default: res = FALSE; } break; case GST_FORMAT_TIME: switch (*dest_format) { case GST_FORMAT_DEFAULT: *dest_format = GST_FORMAT_BYTES; case GST_FORMAT_BYTES: *dest_value = mpeg_parse->mux_rate * 50 * src_value / GST_SECOND; break; default: res = FALSE; } break; default: res = FALSE; break; } return res; } const GstQueryType* gst_mpeg_parse_get_src_query_types (GstPad *pad) { static const GstQueryType types[] = { GST_QUERY_TOTAL, GST_QUERY_POSITION, 0 }; return types; } gboolean gst_mpeg_parse_handle_src_query (GstPad *pad, GstQueryType type, GstFormat *format, gint64 *value) { gboolean res = TRUE; GstMPEGParse *mpeg_parse = GST_MPEG_PARSE (gst_pad_get_parent (pad)); GstFormat src_format; gint64 src_value; switch (type) { case GST_QUERY_TOTAL: { switch (*format) { case GST_FORMAT_DEFAULT: *format = GST_FORMAT_TIME; /* fallthrough */ default: src_format = GST_FORMAT_BYTES; if (!gst_pad_query (GST_PAD_PEER (mpeg_parse->sinkpad), GST_QUERY_TOTAL, &src_format, &src_value)) { res = FALSE; } break; } break; } case GST_QUERY_POSITION: { switch (*format) { case GST_FORMAT_DEFAULT: *format = GST_FORMAT_TIME; /* fallthrough */ default: src_format = GST_FORMAT_TIME; src_value = MPEGTIME_TO_GSTTIME (mpeg_parse->current_scr); break; } break; } default: res = FALSE; break; } /* bring to requested format */ if (res) res = gst_pad_convert (pad, src_format, src_value, format, value); return res; } const GstEventMask* gst_mpeg_parse_get_src_event_masks (GstPad *pad) { static const GstEventMask masks[] = { { GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH }, { 0, } }; return masks; } static gboolean index_seek (GstPad *pad, GstEvent *event, guint64 *offset, gint64 *scr) { GstIndexEntry *entry; GstMPEGParse *mpeg_parse = GST_MPEG_PARSE (gst_pad_get_parent (pad)); entry = gst_index_get_assoc_entry (mpeg_parse->index, mpeg_parse->index_id, GST_INDEX_LOOKUP_BEFORE, 0, GST_EVENT_SEEK_FORMAT (event), GST_EVENT_SEEK_OFFSET (event)); if (!entry) return FALSE; if (gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, offset)) { gint64 time; if (gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &time)) { *scr = GSTTIME_TO_MPEGTIME (time); } GST_CAT_DEBUG (GST_CAT_SEEK, "%s:%s index %s %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT " bytes, scr=%" G_GINT64_FORMAT, GST_DEBUG_PAD_NAME (pad), gst_format_get_details (GST_EVENT_SEEK_FORMAT (event))->nick, GST_EVENT_SEEK_OFFSET (event), *offset, *scr); return TRUE; } return FALSE; } static gboolean normal_seek (GstPad *pad, GstEvent *event, guint64 *offset, gint64 *scr) { gboolean res; GstFormat format; gint64 time; /* bring offset to bytes */ format = GST_FORMAT_BYTES; res = gst_pad_convert (pad, GST_EVENT_SEEK_FORMAT (event), GST_EVENT_SEEK_OFFSET (event), &format, offset); /* bring offset to time */ format = GST_FORMAT_TIME; res &= gst_pad_convert (pad, GST_EVENT_SEEK_FORMAT (event), GST_EVENT_SEEK_OFFSET (event), &format, &time); /* convert to scr */ *scr = GSTTIME_TO_MPEGTIME (time); return res; } gboolean gst_mpeg_parse_handle_src_event (GstPad *pad, GstEvent *event) { gboolean res = FALSE; GstMPEGParse *mpeg_parse = GST_MPEG_PARSE (gst_pad_get_parent (pad)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEEK: { guint64 desired_offset; guint64 expected_scr; /* first to to use the index if we have one */ if (mpeg_parse->index) res = index_seek (pad, event, &desired_offset, &expected_scr); /* nothing found, try fuzzy seek */ if (!res) res = normal_seek (pad, event, &desired_offset, &expected_scr); if (!res) break; GST_DEBUG ("sending seek to %" G_GINT64_FORMAT, desired_offset); if (gst_bytestream_seek (mpeg_parse->packetize->bs, desired_offset, GST_SEEK_METHOD_SET)) { mpeg_parse->discont_pending = TRUE; mpeg_parse->scr_pending = TRUE; mpeg_parse->next_scr = expected_scr; mpeg_parse->current_scr = -1; mpeg_parse->adjust = 0; res = TRUE; } break; } default: break; } gst_event_unref (event); return res; } static GstElementStateReturn gst_mpeg_parse_change_state (GstElement *element) { GstMPEGParse *mpeg_parse = GST_MPEG_PARSE (element); switch (GST_STATE_TRANSITION (element)) { case GST_STATE_READY_TO_PAUSED: if (!mpeg_parse->packetize) { mpeg_parse->packetize = gst_mpeg_packetize_new (mpeg_parse->sinkpad, GST_MPEG_PACKETIZE_SYSTEM); } /* initialize parser state */ mpeg_parse->current_scr = 0; mpeg_parse->bytes_since_scr = 0; mpeg_parse->adjust = 0; mpeg_parse->next_scr = 0; /* zero counters (should be done at RUNNING?) */ mpeg_parse->mux_rate = 0; mpeg_parse->discont_pending = FALSE; mpeg_parse->scr_pending = FALSE; break; case GST_STATE_PAUSED_TO_READY: if (mpeg_parse->packetize) { gst_mpeg_packetize_destroy (mpeg_parse->packetize); mpeg_parse->packetize = NULL; } gst_caps_replace (&mpeg_parse->streaminfo, NULL); break; default: break; } return GST_ELEMENT_CLASS (parent_class)->change_state (element); } static void gst_mpeg_parse_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GstMPEGParse *mpeg_parse; mpeg_parse = GST_MPEG_PARSE(object); switch (prop_id) { case ARG_SYNC: g_value_set_boolean (value, mpeg_parse->sync); break; case ARG_MAX_DISCONT: g_value_set_int (value, mpeg_parse->max_discont); break; case ARG_STREAMINFO: g_value_set_boxed (value, mpeg_parse->streaminfo); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_mpeg_parse_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GstMPEGParse *mpeg_parse; mpeg_parse = GST_MPEG_PARSE (object); switch (prop_id) { case ARG_SYNC: mpeg_parse->sync = g_value_get_boolean (value); break; case ARG_MAX_DISCONT: mpeg_parse->max_discont = g_value_get_int (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_mpeg_parse_set_index (GstElement *element, GstIndex *index) { GstMPEGParse *mpeg_parse; mpeg_parse = GST_MPEG_PARSE (element); mpeg_parse->index = index; gst_index_get_writer_id (index, GST_OBJECT (mpeg_parse->sinkpad), &mpeg_parse->index_id); gst_index_add_format (index, mpeg_parse->index_id, scr_format); } static GstIndex* gst_mpeg_parse_get_index (GstElement *element) { GstMPEGParse *mpeg_parse; mpeg_parse = GST_MPEG_PARSE (element); return mpeg_parse->index; } static gboolean gst_mpeg_parse_release_locks (GstElement *element) { GstMPEGParse *mpeg_parse; mpeg_parse = GST_MPEG_PARSE (element); if (mpeg_parse->id) { gst_clock_id_unlock (mpeg_parse->id); } return TRUE; } gboolean gst_mpeg_parse_plugin_init (GModule *module, GstPlugin *plugin) { GstElementFactory *factory; /* this filter needs the bytestream package */ if (!gst_library_load ("gstbytestream")) return FALSE; /* create an elementfactory for the mpeg_parse element */ factory = gst_element_factory_new ("mpegparse", GST_TYPE_MPEG_PARSE, &mpeg_parse_details); g_return_val_if_fail(factory != NULL, FALSE); scr_format = gst_format_register ("scr", "The MPEG system clock reference time"); gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (src_factory)); gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (sink_factory)); gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory)); return TRUE; }