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3671 lines
100 KiB
C
3671 lines
100 KiB
C
/* GStreamer
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* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
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*
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* gstoggdemux.c: ogg stream demuxer
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-oggdemux
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* @see_also: <link linkend="gst-plugins-base-plugins-oggmux">oggmux</link>
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*
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* This element demuxes ogg files into their encoded audio and video components.
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*
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* <refsect2>
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* <title>Example pipelines</title>
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* |[
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* gst-launch -v filesrc location=test.ogg ! oggdemux ! vorbisdec ! audioconvert ! alsasink
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* ]| Decodes the vorbis audio stored inside an ogg container.
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* </refsect2>
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*
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* Last reviewed on 2006-12-30 (0.10.5)
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <gst/gst-i18n-plugin.h>
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#include <gst/tag/tag.h>
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#include "gstoggdemux.h"
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#define CHUNKSIZE (8500) /* this is out of vorbisfile */
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#define GST_FLOW_LIMIT GST_FLOW_CUSTOM_ERROR
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#define GST_CHAIN_LOCK(ogg) g_mutex_lock((ogg)->chain_lock)
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#define GST_CHAIN_UNLOCK(ogg) g_mutex_unlock((ogg)->chain_lock)
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GST_DEBUG_CATEGORY (gst_ogg_demux_debug);
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GST_DEBUG_CATEGORY (gst_ogg_demux_setup_debug);
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#define GST_CAT_DEFAULT gst_ogg_demux_debug
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static ogg_packet *
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_ogg_packet_copy (const ogg_packet * packet)
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{
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ogg_packet *ret = g_new0 (ogg_packet, 1);
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*ret = *packet;
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ret->packet = g_memdup (packet->packet, packet->bytes);
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return ret;
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}
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static void
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_ogg_packet_free (ogg_packet * packet)
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{
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g_free (packet->packet);
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g_free (packet);
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}
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static ogg_page *
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gst_ogg_page_copy (ogg_page * page)
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{
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ogg_page *p = g_new0 (ogg_page, 1);
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/* make a copy of the page */
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p->header = g_memdup (page->header, page->header_len);
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p->header_len = page->header_len;
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p->body = g_memdup (page->body, page->body_len);
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p->body_len = page->body_len;
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return p;
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}
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static void
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gst_ogg_page_free (ogg_page * page)
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{
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g_free (page->header);
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g_free (page->body);
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g_free (page);
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}
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static gboolean gst_ogg_demux_collect_chain_info (GstOggDemux * ogg,
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GstOggChain * chain);
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static gboolean gst_ogg_demux_activate_chain (GstOggDemux * ogg,
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GstOggChain * chain, GstEvent * event);
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static void gst_ogg_chain_mark_discont (GstOggChain * chain);
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static gboolean gst_ogg_demux_perform_seek (GstOggDemux * ogg,
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GstEvent * event);
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static gboolean gst_ogg_demux_receive_event (GstElement * element,
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GstEvent * event);
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static void gst_ogg_pad_dispose (GObject * object);
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static void gst_ogg_pad_finalize (GObject * object);
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static const GstQueryType *gst_ogg_pad_query_types (GstPad * pad);
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static gboolean gst_ogg_pad_src_query (GstPad * pad, GstQuery ** query);
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static gboolean gst_ogg_pad_event (GstPad * pad, GstEvent * event);
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static GstOggPad *gst_ogg_chain_get_stream (GstOggChain * chain,
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glong serialno);
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static GstFlowReturn gst_ogg_demux_combine_flows (GstOggDemux * ogg,
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GstOggPad * pad, GstFlowReturn ret);
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static void gst_ogg_demux_sync_streams (GstOggDemux * ogg);
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GstCaps *gst_ogg_demux_set_header_on_caps (GstOggDemux * ogg,
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GstCaps * caps, GList * headers);
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GType gst_ogg_pad_get_type (void);
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G_DEFINE_TYPE (GstOggPad, gst_ogg_pad, GST_TYPE_PAD);
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static void
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gst_ogg_pad_class_init (GstOggPadClass * klass)
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{
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GObjectClass *gobject_class;
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gobject_class = (GObjectClass *) klass;
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gobject_class->dispose = gst_ogg_pad_dispose;
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gobject_class->finalize = gst_ogg_pad_finalize;
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}
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static void
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gst_ogg_pad_init (GstOggPad * pad)
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{
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gst_pad_set_event_function (GST_PAD (pad),
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GST_DEBUG_FUNCPTR (gst_ogg_pad_event));
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gst_pad_set_query_type_function (GST_PAD (pad),
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GST_DEBUG_FUNCPTR (gst_ogg_pad_query_types));
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gst_pad_set_query_function (GST_PAD (pad),
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GST_DEBUG_FUNCPTR (gst_ogg_pad_src_query));
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gst_pad_use_fixed_caps (GST_PAD (pad));
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pad->mode = GST_OGG_PAD_MODE_INIT;
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pad->current_granule = -1;
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pad->keyframe_granule = -1;
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pad->start_time = GST_CLOCK_TIME_NONE;
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pad->position = GST_CLOCK_TIME_NONE;
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pad->have_type = FALSE;
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pad->continued = NULL;
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pad->map.headers = NULL;
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pad->map.queued = NULL;
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}
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static void
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gst_ogg_pad_dispose (GObject * object)
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{
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GstOggPad *pad = GST_OGG_PAD (object);
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pad->chain = NULL;
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pad->ogg = NULL;
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g_list_foreach (pad->map.headers, (GFunc) _ogg_packet_free, NULL);
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g_list_free (pad->map.headers);
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pad->map.headers = NULL;
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g_list_foreach (pad->map.queued, (GFunc) _ogg_packet_free, NULL);
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g_list_free (pad->map.queued);
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pad->map.queued = NULL;
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g_free (pad->map.index);
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pad->map.index = NULL;
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/* clear continued pages */
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g_list_foreach (pad->continued, (GFunc) gst_ogg_page_free, NULL);
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g_list_free (pad->continued);
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pad->continued = NULL;
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if (pad->map.caps) {
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gst_caps_unref (pad->map.caps);
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pad->map.caps = NULL;
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}
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if (pad->map.taglist) {
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gst_tag_list_free (pad->map.taglist);
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pad->map.taglist = NULL;
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}
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ogg_stream_reset (&pad->map.stream);
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G_OBJECT_CLASS (gst_ogg_pad_parent_class)->dispose (object);
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}
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static void
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gst_ogg_pad_finalize (GObject * object)
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{
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GstOggPad *pad = GST_OGG_PAD (object);
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ogg_stream_clear (&pad->map.stream);
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G_OBJECT_CLASS (gst_ogg_pad_parent_class)->finalize (object);
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}
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static const GstQueryType *
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gst_ogg_pad_query_types (GstPad * pad)
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{
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static const GstQueryType query_types[] = {
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GST_QUERY_DURATION,
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GST_QUERY_SEEKING,
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0
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};
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return query_types;
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}
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static gboolean
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gst_ogg_pad_src_query (GstPad * pad, GstQuery ** query)
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{
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gboolean res = TRUE;
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GstOggDemux *ogg;
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ogg = GST_OGG_DEMUX (gst_pad_get_parent (pad));
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switch (GST_QUERY_TYPE (*query)) {
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case GST_QUERY_DURATION:
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{
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GstFormat format;
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gint64 total_time = -1;
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gst_query_parse_duration (*query, &format, NULL);
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/* can only get position in time */
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if (format != GST_FORMAT_TIME)
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goto wrong_format;
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if (ogg->total_time != -1) {
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/* we can return the total length */
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total_time = ogg->total_time;
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} else {
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gint bitrate = ogg->bitrate;
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/* try with length and bitrate */
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if (bitrate > 0) {
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GstQuery *uquery;
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/* ask upstream for total length in bytes */
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uquery = gst_query_new_duration (GST_FORMAT_BYTES);
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if (gst_pad_peer_query (ogg->sinkpad, &uquery)) {
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gint64 length;
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gst_query_parse_duration (uquery, NULL, &length);
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/* estimate using the bitrate */
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total_time =
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gst_util_uint64_scale (length, 8 * GST_SECOND, bitrate);
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GST_LOG_OBJECT (ogg,
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"length: %" G_GINT64_FORMAT ", bitrate %d, total_time %"
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GST_TIME_FORMAT, length, bitrate, GST_TIME_ARGS (total_time));
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}
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gst_query_unref (uquery);
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}
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}
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gst_query_set_duration (*query, GST_FORMAT_TIME, total_time);
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break;
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}
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case GST_QUERY_SEEKING:
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{
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GstFormat format;
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gst_query_parse_seeking (*query, &format, NULL, NULL, NULL);
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if (format == GST_FORMAT_TIME) {
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gboolean seekable = FALSE;
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gint64 stop = -1;
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if (ogg->pullmode) {
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seekable = TRUE;
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stop = ogg->total_time;
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} else if (ogg->current_chain->streams->len) {
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gint i;
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seekable = FALSE;
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for (i = 0; i < ogg->current_chain->streams->len; i++) {
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GstOggPad *pad =
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g_array_index (ogg->current_chain->streams, GstOggPad *, i);
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seekable |= (pad->map.index != NULL && pad->map.n_index != 0);
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if (pad->map.index != NULL && pad->map.n_index != 0) {
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GstOggIndex *idx;
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GstClockTime idx_time;
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idx = &pad->map.index[pad->map.n_index - 1];
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idx_time =
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gst_util_uint64_scale (idx->timestamp, GST_SECOND,
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pad->map.kp_denom);
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if (stop == -1)
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stop = idx_time;
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else
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stop = MAX (idx_time, stop);
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}
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}
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}
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gst_query_set_seeking (*query, GST_FORMAT_TIME, seekable, 0, stop);
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} else {
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res = FALSE;
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}
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break;
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}
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default:
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res = gst_pad_query_default (pad, query);
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break;
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}
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done:
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gst_object_unref (ogg);
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return res;
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/* ERRORS */
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wrong_format:
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{
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GST_DEBUG_OBJECT (ogg, "only query duration on TIME is supported");
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res = FALSE;
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goto done;
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}
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}
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static gboolean
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gst_ogg_demux_receive_event (GstElement * element, GstEvent * event)
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{
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gboolean res;
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GstOggDemux *ogg;
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ogg = GST_OGG_DEMUX (element);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_SEEK:
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/* now do the seek */
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res = gst_ogg_demux_perform_seek (ogg, event);
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gst_event_unref (event);
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break;
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default:
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GST_DEBUG_OBJECT (ogg, "We only handle seek events here");
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goto error;
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}
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return res;
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/* ERRORS */
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error:
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{
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GST_DEBUG_OBJECT (ogg, "error handling event");
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gst_event_unref (event);
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return FALSE;
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}
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}
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static gboolean
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gst_ogg_pad_event (GstPad * pad, GstEvent * event)
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{
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gboolean res;
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GstOggDemux *ogg;
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ogg = GST_OGG_DEMUX (gst_pad_get_parent (pad));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_SEEK:
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/* now do the seek */
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res = gst_ogg_demux_perform_seek (ogg, event);
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gst_event_unref (event);
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break;
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default:
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res = gst_pad_event_default (pad, event);
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break;
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}
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gst_object_unref (ogg);
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return res;
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}
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static void
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gst_ogg_pad_reset (GstOggPad * pad)
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{
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ogg_stream_reset (&pad->map.stream);
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GST_DEBUG_OBJECT (pad, "doing reset");
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/* clear continued pages */
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g_list_foreach (pad->continued, (GFunc) gst_ogg_page_free, NULL);
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g_list_free (pad->continued);
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pad->continued = NULL;
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pad->last_ret = GST_FLOW_OK;
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pad->position = GST_CLOCK_TIME_NONE;
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pad->current_granule = -1;
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pad->keyframe_granule = -1;
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pad->is_eos = FALSE;
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}
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/* queue data, basically takes the packet, puts it in a buffer and store the
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* buffer in the queued list. */
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static GstFlowReturn
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gst_ogg_demux_queue_data (GstOggPad * pad, ogg_packet * packet)
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{
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#ifndef GST_DISABLE_GST_DEBUG
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GstOggDemux *ogg = pad->ogg;
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#endif
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GST_DEBUG_OBJECT (ogg, "%p queueing data serial %08lx", pad,
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pad->map.serialno);
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pad->map.queued = g_list_append (pad->map.queued, _ogg_packet_copy (packet));
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/* we are ok now */
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return GST_FLOW_OK;
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}
|
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|
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static GstFlowReturn
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gst_ogg_demux_chain_peer (GstOggPad * pad, ogg_packet * packet,
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gboolean push_headers)
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{
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GstBuffer *buf = NULL;
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GstFlowReturn ret, cret;
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GstOggDemux *ogg = pad->ogg;
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gint64 current_time;
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GstOggChain *chain;
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gint64 duration;
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gint offset;
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gint trim;
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GstClockTime out_timestamp, out_duration;
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guint64 out_offset, out_offset_end;
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gboolean delta_unit = FALSE;
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cret = GST_FLOW_OK;
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GST_DEBUG_OBJECT (ogg,
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"%p streaming to peer serial %08lx", pad, pad->map.serialno);
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|
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if (pad->map.is_ogm) {
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const guint8 *data;
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long bytes;
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|
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data = packet->packet;
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bytes = packet->bytes;
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|
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if (bytes < 1)
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goto empty_packet;
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if ((data[0] & 1) || (data[0] & 3 && pad->map.is_ogm_text)) {
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/* We don't push header packets for OGM */
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goto done;
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}
|
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offset = 1 + (((data[0] & 0xc0) >> 6) | ((data[0] & 0x02) << 1));
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delta_unit = (((data[0] & 0x08) >> 3) == 0);
|
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|
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trim = 0;
|
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|
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/* Strip trailing \0 for subtitles */
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if (pad->map.is_ogm_text) {
|
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while (bytes && data[bytes - 1] == 0) {
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trim++;
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bytes--;
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}
|
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}
|
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} else if (pad->map.is_vp8) {
|
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if ((packet->bytes >= 7 && memcmp (packet->packet, "OVP80\2 ", 7) == 0) ||
|
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packet->b_o_s ||
|
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(packet->bytes >= 5 && memcmp (packet->packet, "OVP80", 5) == 0)) {
|
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/* We don't push header packets for VP8 */
|
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goto done;
|
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}
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offset = 0;
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trim = 0;
|
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} else {
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offset = 0;
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trim = 0;
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}
|
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|
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/* get timing info for the packet */
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duration = gst_ogg_stream_get_packet_duration (&pad->map, packet);
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GST_DEBUG_OBJECT (ogg, "packet duration %" G_GUINT64_FORMAT, duration);
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|
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if (packet->b_o_s) {
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out_timestamp = GST_CLOCK_TIME_NONE;
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out_duration = GST_CLOCK_TIME_NONE;
|
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out_offset = 0;
|
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out_offset_end = -1;
|
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} else {
|
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if (packet->granulepos != -1) {
|
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pad->current_granule = gst_ogg_stream_granulepos_to_granule (&pad->map,
|
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packet->granulepos);
|
|
pad->keyframe_granule =
|
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gst_ogg_stream_granulepos_to_key_granule (&pad->map,
|
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packet->granulepos);
|
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GST_DEBUG_OBJECT (ogg, "new granule %" G_GUINT64_FORMAT,
|
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pad->current_granule);
|
|
} else if (ogg->segment.rate > 0.0 && pad->current_granule != -1) {
|
|
pad->current_granule += duration;
|
|
GST_DEBUG_OBJECT (ogg, "interpollating granule %" G_GUINT64_FORMAT,
|
|
pad->current_granule);
|
|
}
|
|
if (ogg->segment.rate < 0.0 && packet->granulepos == -1) {
|
|
/* negative rates, only set timestamp on the packets with a granulepos */
|
|
out_timestamp = -1;
|
|
out_duration = -1;
|
|
out_offset = -1;
|
|
out_offset_end = -1;
|
|
} else {
|
|
/* we only push buffers after we have a valid granule. This is done so that
|
|
* we nicely skip packets without a timestamp after a seek. This is ok
|
|
* because we base or seek on the packet after the page with the smaller
|
|
* timestamp. */
|
|
if (pad->current_granule == -1)
|
|
goto no_timestamp;
|
|
|
|
if (pad->map.is_ogm) {
|
|
out_timestamp = gst_ogg_stream_granule_to_time (&pad->map,
|
|
pad->current_granule);
|
|
out_duration = gst_util_uint64_scale (duration,
|
|
GST_SECOND * pad->map.granulerate_d, pad->map.granulerate_n);
|
|
} else if (pad->map.is_sparse) {
|
|
out_timestamp = gst_ogg_stream_granule_to_time (&pad->map,
|
|
pad->current_granule);
|
|
if (duration == GST_CLOCK_TIME_NONE) {
|
|
out_duration = GST_CLOCK_TIME_NONE;
|
|
} else {
|
|
out_duration = gst_util_uint64_scale (duration,
|
|
GST_SECOND * pad->map.granulerate_d, pad->map.granulerate_n);
|
|
}
|
|
} else {
|
|
out_timestamp = gst_ogg_stream_granule_to_time (&pad->map,
|
|
pad->current_granule - duration);
|
|
out_duration =
|
|
gst_ogg_stream_granule_to_time (&pad->map,
|
|
pad->current_granule) - out_timestamp;
|
|
}
|
|
out_offset_end =
|
|
gst_ogg_stream_granule_to_granulepos (&pad->map,
|
|
pad->current_granule, pad->keyframe_granule);
|
|
out_offset =
|
|
gst_ogg_stream_granule_to_time (&pad->map, pad->current_granule);
|
|
}
|
|
}
|
|
|
|
if (pad->map.is_ogm_text) {
|
|
/* check for invalid buffer sizes */
|
|
if (G_UNLIKELY (offset + trim >= packet->bytes))
|
|
goto empty_packet;
|
|
}
|
|
|
|
if (!pad->added)
|
|
goto not_added;
|
|
|
|
buf = gst_buffer_new_and_alloc (packet->bytes - offset - trim);
|
|
|
|
/* set delta flag for OGM content */
|
|
if (delta_unit)
|
|
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
|
|
|
|
/* copy packet in buffer */
|
|
gst_buffer_fill (buf, 0, packet->packet + offset,
|
|
packet->bytes - offset - trim);
|
|
|
|
GST_BUFFER_TIMESTAMP (buf) = out_timestamp;
|
|
GST_BUFFER_DURATION (buf) = out_duration;
|
|
GST_BUFFER_OFFSET (buf) = out_offset;
|
|
GST_BUFFER_OFFSET_END (buf) = out_offset_end;
|
|
|
|
/* Mark discont on the buffer */
|
|
if (pad->discont) {
|
|
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
|
|
pad->discont = FALSE;
|
|
}
|
|
|
|
pad->position = ogg->segment.position;
|
|
|
|
/* don't push the header packets when we are asked to skip them */
|
|
if (!packet->b_o_s || push_headers) {
|
|
ret = gst_pad_push (GST_PAD_CAST (pad), buf);
|
|
buf = NULL;
|
|
|
|
/* combine flows */
|
|
cret = gst_ogg_demux_combine_flows (ogg, pad, ret);
|
|
}
|
|
|
|
/* we're done with skeleton stuff */
|
|
if (pad->map.is_skeleton)
|
|
goto done;
|
|
|
|
/* check if valid granulepos, then we can calculate the current
|
|
* position. We know the granule for each packet but we only want to update
|
|
* the position when we have a valid granulepos on the packet because else
|
|
* our time jumps around for the different streams. */
|
|
if (packet->granulepos < 0)
|
|
goto done;
|
|
|
|
/* convert to time */
|
|
current_time = gst_ogg_stream_get_end_time_for_granulepos (&pad->map,
|
|
packet->granulepos);
|
|
|
|
/* convert to stream time */
|
|
if ((chain = pad->chain)) {
|
|
gint64 chain_start = 0;
|
|
|
|
if (chain->segment_start != GST_CLOCK_TIME_NONE)
|
|
chain_start = chain->segment_start;
|
|
|
|
current_time = current_time - chain_start + chain->begin_time;
|
|
}
|
|
|
|
/* and store as the current position */
|
|
ogg->segment.position = current_time;
|
|
|
|
GST_DEBUG_OBJECT (ogg, "ogg current time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (current_time));
|
|
|
|
/* check stream eos */
|
|
if ((ogg->segment.rate > 0.0 && ogg->segment.stop != GST_CLOCK_TIME_NONE &&
|
|
current_time > ogg->segment.stop) ||
|
|
(ogg->segment.rate < 0.0 && ogg->segment.start != GST_CLOCK_TIME_NONE &&
|
|
current_time < ogg->segment.start)) {
|
|
GST_DEBUG_OBJECT (ogg, "marking pad %p EOS", pad);
|
|
pad->is_eos = TRUE;
|
|
}
|
|
|
|
done:
|
|
if (buf)
|
|
gst_buffer_unref (buf);
|
|
/* return combined flow result */
|
|
return cret;
|
|
|
|
/* special cases */
|
|
empty_packet:
|
|
{
|
|
GST_DEBUG_OBJECT (ogg, "Skipping empty packet");
|
|
goto done;
|
|
}
|
|
|
|
no_timestamp:
|
|
{
|
|
GST_DEBUG_OBJECT (ogg, "skipping packet: no valid granule found yet");
|
|
goto done;
|
|
}
|
|
not_added:
|
|
{
|
|
GST_DEBUG_OBJECT (ogg, "pad not added yet");
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
static guint64
|
|
gst_ogg_demux_collect_start_time (GstOggDemux * ogg, GstOggChain * chain)
|
|
{
|
|
gint i;
|
|
guint64 start_time = G_MAXUINT64;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
if (pad->map.is_sparse)
|
|
continue;
|
|
|
|
/* can do this if the pad start time is not defined */
|
|
if (pad->start_time == GST_CLOCK_TIME_NONE) {
|
|
start_time = G_MAXUINT64;
|
|
break;
|
|
} else {
|
|
start_time = MIN (start_time, pad->start_time);
|
|
}
|
|
}
|
|
return start_time;
|
|
}
|
|
|
|
/* submit a packet to the oggpad, this function will run the
|
|
* typefind code for the pad if this is the first packet for this
|
|
* stream
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_pad_submit_packet (GstOggPad * pad, ogg_packet * packet)
|
|
{
|
|
gint64 granule;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
|
|
GstOggDemux *ogg = pad->ogg;
|
|
|
|
GST_DEBUG_OBJECT (ogg, "%p submit packet serial %08lx", pad,
|
|
pad->map.serialno);
|
|
|
|
if (!pad->have_type) {
|
|
pad->have_type = gst_ogg_stream_setup_map (&pad->map, packet);
|
|
if (!pad->have_type) {
|
|
pad->map.caps = gst_caps_new_simple ("application/x-unknown", NULL);
|
|
}
|
|
if (pad->map.is_skeleton) {
|
|
GST_DEBUG_OBJECT (ogg, "we have a fishead");
|
|
/* copy values over to global ogg level */
|
|
ogg->basetime = pad->map.basetime;
|
|
ogg->prestime = pad->map.prestime;
|
|
|
|
/* use total time to update the total ogg time */
|
|
if (ogg->total_time == -1) {
|
|
ogg->total_time = pad->map.total_time;
|
|
} else if (pad->map.total_time > 0) {
|
|
ogg->total_time = MAX (ogg->total_time, pad->map.total_time);
|
|
}
|
|
}
|
|
if (pad->map.caps) {
|
|
gst_pad_set_caps (GST_PAD (pad), pad->map.caps);
|
|
} else {
|
|
GST_WARNING_OBJECT (ogg, "stream parser didn't create src pad caps");
|
|
}
|
|
}
|
|
|
|
if (pad->map.is_skeleton) {
|
|
guint32 serialno;
|
|
GstOggPad *skel_pad;
|
|
GstOggSkeleton type;
|
|
|
|
/* try to parse the serialno first */
|
|
if (gst_ogg_map_parse_fisbone (&pad->map, packet->packet, packet->bytes,
|
|
&serialno, &type)) {
|
|
|
|
GST_WARNING_OBJECT (pad->ogg,
|
|
"got skeleton packet for stream 0x%08x", serialno);
|
|
|
|
skel_pad = gst_ogg_chain_get_stream (pad->chain, serialno);
|
|
if (skel_pad) {
|
|
switch (type) {
|
|
case GST_OGG_SKELETON_FISBONE:
|
|
/* parse the remainder of the fisbone in the pad with the serialno,
|
|
* note that we ignore the start_time as this is usually wrong for
|
|
* live streams */
|
|
gst_ogg_map_add_fisbone (&skel_pad->map, &pad->map, packet->packet,
|
|
packet->bytes, NULL);
|
|
break;
|
|
case GST_OGG_SKELETON_INDEX:
|
|
gst_ogg_map_add_index (&skel_pad->map, &pad->map, packet->packet,
|
|
packet->bytes);
|
|
|
|
/* use total time to update the total ogg time */
|
|
if (ogg->total_time == -1) {
|
|
ogg->total_time = skel_pad->map.total_time;
|
|
} else if (skel_pad->map.total_time > 0) {
|
|
ogg->total_time = MAX (ogg->total_time, skel_pad->map.total_time);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
} else {
|
|
GST_WARNING_OBJECT (pad->ogg,
|
|
"found skeleton fisbone for an unknown stream 0x%08x", serialno);
|
|
}
|
|
}
|
|
}
|
|
|
|
granule = gst_ogg_stream_granulepos_to_granule (&pad->map,
|
|
packet->granulepos);
|
|
if (granule != -1) {
|
|
GST_DEBUG_OBJECT (ogg, "%p has granulepos %" G_GINT64_FORMAT, pad, granule);
|
|
pad->current_granule = granule;
|
|
}
|
|
|
|
/* restart header packet count when seeing a b_o_s page;
|
|
* particularly useful following a seek or even following chain finding */
|
|
if (packet->b_o_s) {
|
|
GST_DEBUG_OBJECT (ogg, "b_o_s packet, resetting header packet count");
|
|
pad->map.n_header_packets_seen = 0;
|
|
if (!pad->map.have_headers) {
|
|
GST_DEBUG_OBJECT (ogg, "clearing header packets");
|
|
g_list_foreach (pad->map.headers, (GFunc) _ogg_packet_free, NULL);
|
|
g_list_free (pad->map.headers);
|
|
pad->map.headers = NULL;
|
|
}
|
|
}
|
|
|
|
/* Overload the value of b_o_s in ogg_packet with a flag whether or
|
|
* not this is a header packet. Maybe some day this could be cleaned
|
|
* up. */
|
|
packet->b_o_s = gst_ogg_stream_packet_is_header (&pad->map, packet);
|
|
if (!packet->b_o_s) {
|
|
GST_DEBUG ("found non-header packet");
|
|
pad->map.have_headers = TRUE;
|
|
if (pad->start_time == GST_CLOCK_TIME_NONE) {
|
|
gint64 duration = gst_ogg_stream_get_packet_duration (&pad->map, packet);
|
|
GST_DEBUG ("duration %" G_GINT64_FORMAT, duration);
|
|
if (duration != -1) {
|
|
pad->map.accumulated_granule += duration;
|
|
GST_DEBUG ("accumulated granule %" G_GINT64_FORMAT,
|
|
pad->map.accumulated_granule);
|
|
}
|
|
|
|
if (packet->granulepos != -1) {
|
|
ogg_int64_t start_granule;
|
|
gint64 granule;
|
|
|
|
granule = gst_ogg_stream_granulepos_to_granule (&pad->map,
|
|
packet->granulepos);
|
|
|
|
if (granule > pad->map.accumulated_granule)
|
|
start_granule = granule - pad->map.accumulated_granule;
|
|
else
|
|
start_granule = 0;
|
|
|
|
pad->start_time = gst_ogg_stream_granule_to_time (&pad->map,
|
|
start_granule);
|
|
GST_DEBUG ("start time %" G_GINT64_FORMAT, pad->start_time);
|
|
} else {
|
|
packet->granulepos = gst_ogg_stream_granule_to_granulepos (&pad->map,
|
|
pad->map.accumulated_granule, pad->keyframe_granule);
|
|
}
|
|
}
|
|
} else {
|
|
/* look for tags in header packet (before inc header count) */
|
|
gst_ogg_stream_extract_tags (&pad->map, packet);
|
|
pad->map.n_header_packets_seen++;
|
|
if (!pad->map.have_headers) {
|
|
pad->map.headers =
|
|
g_list_append (pad->map.headers, _ogg_packet_copy (packet));
|
|
GST_DEBUG ("keeping header packet %d", pad->map.n_header_packets_seen);
|
|
}
|
|
}
|
|
|
|
/* we know the start_time of the pad data, see if we
|
|
* can activate the complete chain if this is a dynamic
|
|
* chain. We need all the headers too for this. */
|
|
if (pad->start_time != GST_CLOCK_TIME_NONE && pad->map.have_headers) {
|
|
GstOggChain *chain = pad->chain;
|
|
|
|
/* check if complete chain has start time */
|
|
if (chain == ogg->building_chain) {
|
|
GstEvent *event = NULL;
|
|
|
|
if (ogg->resync) {
|
|
guint64 start_time;
|
|
|
|
GST_DEBUG_OBJECT (ogg, "need to resync");
|
|
|
|
/* when we need to resync after a seek, we wait until we have received
|
|
* timestamps on all streams */
|
|
start_time = gst_ogg_demux_collect_start_time (ogg, chain);
|
|
|
|
if (start_time != G_MAXUINT64) {
|
|
gint64 segment_time;
|
|
GstSegment segment;
|
|
|
|
GST_DEBUG_OBJECT (ogg, "start_time: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (start_time));
|
|
|
|
if (chain->segment_start < start_time)
|
|
segment_time =
|
|
(start_time - chain->segment_start) + chain->begin_time;
|
|
else
|
|
segment_time = chain->begin_time;
|
|
|
|
/* create the newsegment event we are going to send out */
|
|
gst_segment_init (&segment, GST_FORMAT_TIME);
|
|
segment.rate = ogg->segment.rate;
|
|
segment.applied_rate = ogg->segment.applied_rate;
|
|
segment.start = start_time;
|
|
segment.stop = chain->segment_stop;
|
|
segment.time = segment_time;
|
|
event = gst_event_new_segment (&segment);
|
|
|
|
ogg->resync = FALSE;
|
|
}
|
|
} else {
|
|
/* see if we have enough info to activate the chain, we have enough info
|
|
* when all streams have a valid start time. */
|
|
if (gst_ogg_demux_collect_chain_info (ogg, chain)) {
|
|
GstSegment segment;
|
|
|
|
GST_DEBUG_OBJECT (ogg, "segment_start: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (chain->segment_start));
|
|
GST_DEBUG_OBJECT (ogg, "segment_stop: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (chain->segment_stop));
|
|
GST_DEBUG_OBJECT (ogg, "segment_time: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (chain->begin_time));
|
|
|
|
/* create the newsegment event we are going to send out */
|
|
gst_segment_init (&segment, GST_FORMAT_TIME);
|
|
segment.rate = ogg->segment.rate;
|
|
segment.applied_rate = ogg->segment.applied_rate;
|
|
segment.start = chain->segment_start;
|
|
segment.stop = chain->segment_stop;
|
|
segment.time = chain->begin_time;
|
|
event = gst_event_new_segment (&segment);
|
|
}
|
|
}
|
|
|
|
if (event) {
|
|
gst_event_set_seqnum (event, ogg->seqnum);
|
|
|
|
gst_ogg_demux_activate_chain (ogg, chain, event);
|
|
|
|
ogg->building_chain = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* if we are building a chain, store buffer for when we activate
|
|
* it. This path is taken if we operate in streaming mode. */
|
|
if (ogg->building_chain) {
|
|
/* bos packets where stored in the header list so we can discard
|
|
* them here*/
|
|
if (!packet->b_o_s)
|
|
ret = gst_ogg_demux_queue_data (pad, packet);
|
|
}
|
|
/* else we are completely streaming to the peer */
|
|
else {
|
|
ret = gst_ogg_demux_chain_peer (pad, packet, !ogg->pullmode);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* flush at most @npackets from the stream layer. All packets if
|
|
* @npackets is 0;
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_pad_stream_out (GstOggPad * pad, gint npackets)
|
|
{
|
|
GstFlowReturn result = GST_FLOW_OK;
|
|
gboolean done = FALSE;
|
|
GstOggDemux *ogg;
|
|
|
|
ogg = pad->ogg;
|
|
|
|
while (!done) {
|
|
int ret;
|
|
ogg_packet packet;
|
|
|
|
ret = ogg_stream_packetout (&pad->map.stream, &packet);
|
|
switch (ret) {
|
|
case 0:
|
|
GST_LOG_OBJECT (ogg, "packetout done");
|
|
done = TRUE;
|
|
break;
|
|
case -1:
|
|
GST_LOG_OBJECT (ogg, "packetout discont");
|
|
gst_ogg_chain_mark_discont (pad->chain);
|
|
break;
|
|
case 1:
|
|
GST_LOG_OBJECT (ogg, "packetout gave packet of size %ld", packet.bytes);
|
|
result = gst_ogg_pad_submit_packet (pad, &packet);
|
|
/* not linked is not a problem, it's possible that we are still
|
|
* collecting headers and that we don't have exposed the pads yet */
|
|
if (result == GST_FLOW_NOT_LINKED)
|
|
break;
|
|
else if (result <= GST_FLOW_UNEXPECTED)
|
|
goto could_not_submit;
|
|
break;
|
|
default:
|
|
GST_WARNING_OBJECT (ogg,
|
|
"invalid return value %d for ogg_stream_packetout, resetting stream",
|
|
ret);
|
|
gst_ogg_pad_reset (pad);
|
|
break;
|
|
}
|
|
if (npackets > 0) {
|
|
npackets--;
|
|
done = (npackets == 0);
|
|
}
|
|
}
|
|
return result;
|
|
|
|
/* ERRORS */
|
|
could_not_submit:
|
|
{
|
|
GST_WARNING_OBJECT (ogg,
|
|
"could not submit packet for stream %08lx, error: %d",
|
|
pad->map.serialno, result);
|
|
gst_ogg_pad_reset (pad);
|
|
return result;
|
|
}
|
|
}
|
|
|
|
/* submit a page to an oggpad, this function will then submit all
|
|
* the packets in the page.
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_pad_submit_page (GstOggPad * pad, ogg_page * page)
|
|
{
|
|
GstFlowReturn result = GST_FLOW_OK;
|
|
GstOggDemux *ogg;
|
|
gboolean continued = FALSE;
|
|
|
|
ogg = pad->ogg;
|
|
|
|
/* for negative rates we read pages backwards and must therefore be carefull
|
|
* with continued pages */
|
|
if (ogg->segment.rate < 0.0) {
|
|
gint npackets;
|
|
|
|
continued = ogg_page_continued (page);
|
|
|
|
/* number of completed packets in the page */
|
|
npackets = ogg_page_packets (page);
|
|
if (!continued) {
|
|
/* page is not continued so it contains at least one packet start. It's
|
|
* possible that no packet ends on this page (npackets == 0). In that
|
|
* case, the next (continued) page(s) we kept contain the remainder of the
|
|
* packets. We mark npackets=1 to make us start decoding the pages in the
|
|
* remainder of the algorithm. */
|
|
if (npackets == 0)
|
|
npackets = 1;
|
|
}
|
|
GST_LOG_OBJECT (ogg, "continued: %d, %d packets", continued, npackets);
|
|
|
|
if (npackets == 0) {
|
|
GST_LOG_OBJECT (ogg, "no decodable packets, we need a previous page");
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
if (ogg_stream_pagein (&pad->map.stream, page) != 0)
|
|
goto choked;
|
|
|
|
/* flush all packets in the stream layer, this might not give a packet if
|
|
* the page had no packets finishing on the page (npackets == 0). */
|
|
result = gst_ogg_pad_stream_out (pad, 0);
|
|
|
|
if (pad->continued) {
|
|
ogg_packet packet;
|
|
|
|
/* now send the continued pages to the stream layer */
|
|
while (pad->continued) {
|
|
ogg_page *p = (ogg_page *) pad->continued->data;
|
|
|
|
GST_LOG_OBJECT (ogg, "submitting continued page %p", p);
|
|
if (ogg_stream_pagein (&pad->map.stream, p) != 0)
|
|
goto choked;
|
|
|
|
pad->continued = g_list_delete_link (pad->continued, pad->continued);
|
|
|
|
/* free the page */
|
|
gst_ogg_page_free (p);
|
|
}
|
|
|
|
GST_LOG_OBJECT (ogg, "flushing last continued packet");
|
|
/* flush 1 continued packet in the stream layer */
|
|
result = gst_ogg_pad_stream_out (pad, 1);
|
|
|
|
/* flush all remaining packets, we pushed them in the previous round.
|
|
* We don't use _reset() because we still want to get the discont when
|
|
* we submit a next page. */
|
|
while (ogg_stream_packetout (&pad->map.stream, &packet) != 0);
|
|
}
|
|
|
|
done:
|
|
/* keep continued pages (only in reverse mode) */
|
|
if (continued) {
|
|
ogg_page *p = gst_ogg_page_copy (page);
|
|
|
|
GST_LOG_OBJECT (ogg, "keeping continued page %p", p);
|
|
pad->continued = g_list_prepend (pad->continued, p);
|
|
}
|
|
|
|
return result;
|
|
|
|
choked:
|
|
{
|
|
GST_WARNING_OBJECT (ogg,
|
|
"ogg stream choked on page (serial %08lx), resetting stream",
|
|
pad->map.serialno);
|
|
gst_ogg_pad_reset (pad);
|
|
/* we continue to recover */
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
|
|
static GstOggChain *
|
|
gst_ogg_chain_new (GstOggDemux * ogg)
|
|
{
|
|
GstOggChain *chain = g_new0 (GstOggChain, 1);
|
|
|
|
GST_DEBUG_OBJECT (ogg, "creating new chain %p", chain);
|
|
chain->ogg = ogg;
|
|
chain->offset = -1;
|
|
chain->bytes = -1;
|
|
chain->have_bos = FALSE;
|
|
chain->streams = g_array_new (FALSE, TRUE, sizeof (GstOggPad *));
|
|
chain->begin_time = GST_CLOCK_TIME_NONE;
|
|
chain->segment_start = GST_CLOCK_TIME_NONE;
|
|
chain->segment_stop = GST_CLOCK_TIME_NONE;
|
|
chain->total_time = GST_CLOCK_TIME_NONE;
|
|
|
|
return chain;
|
|
}
|
|
|
|
static void
|
|
gst_ogg_chain_free (GstOggChain * chain)
|
|
{
|
|
gint i;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
gst_object_unref (pad);
|
|
}
|
|
g_array_free (chain->streams, TRUE);
|
|
g_free (chain);
|
|
}
|
|
|
|
static void
|
|
gst_ogg_pad_mark_discont (GstOggPad * pad)
|
|
{
|
|
pad->discont = TRUE;
|
|
pad->map.last_size = 0;
|
|
}
|
|
|
|
static void
|
|
gst_ogg_chain_mark_discont (GstOggChain * chain)
|
|
{
|
|
gint i;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
gst_ogg_pad_mark_discont (pad);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_ogg_chain_reset (GstOggChain * chain)
|
|
{
|
|
gint i;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
gst_ogg_pad_reset (pad);
|
|
}
|
|
}
|
|
|
|
static GstOggPad *
|
|
gst_ogg_chain_new_stream (GstOggChain * chain, glong serialno)
|
|
{
|
|
GstOggPad *ret;
|
|
GstTagList *list;
|
|
gchar *name;
|
|
|
|
GST_DEBUG_OBJECT (chain->ogg, "creating new stream %08lx in chain %p",
|
|
serialno, chain);
|
|
|
|
ret = g_object_new (GST_TYPE_OGG_PAD, NULL);
|
|
/* we own this one */
|
|
gst_object_ref_sink (ret);
|
|
|
|
GST_PAD_DIRECTION (ret) = GST_PAD_SRC;
|
|
gst_ogg_pad_mark_discont (ret);
|
|
|
|
ret->chain = chain;
|
|
ret->ogg = chain->ogg;
|
|
|
|
ret->map.serialno = serialno;
|
|
if (ogg_stream_init (&ret->map.stream, serialno) != 0)
|
|
goto init_failed;
|
|
|
|
name = g_strdup_printf ("serial_%08lx", serialno);
|
|
gst_object_set_name (GST_OBJECT (ret), name);
|
|
g_free (name);
|
|
|
|
/* FIXME: either do something with it or remove it */
|
|
list = gst_tag_list_new ();
|
|
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_SERIAL, serialno,
|
|
NULL);
|
|
gst_tag_list_free (list);
|
|
|
|
GST_DEBUG_OBJECT (chain->ogg,
|
|
"created new ogg src %p for stream with serial %08lx", ret, serialno);
|
|
|
|
g_array_append_val (chain->streams, ret);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
init_failed:
|
|
{
|
|
GST_ERROR ("Could not initialize ogg_stream struct for serial %08lx.",
|
|
serialno);
|
|
gst_object_unref (ret);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static GstOggPad *
|
|
gst_ogg_chain_get_stream (GstOggChain * chain, glong serialno)
|
|
{
|
|
gint i;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
if (pad->map.serialno == serialno)
|
|
return pad;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ogg_chain_has_stream (GstOggChain * chain, glong serialno)
|
|
{
|
|
return gst_ogg_chain_get_stream (chain, serialno) != NULL;
|
|
}
|
|
|
|
/* signals and args */
|
|
enum
|
|
{
|
|
/* FILL ME */
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
enum
|
|
{
|
|
ARG_0
|
|
/* FILL ME */
|
|
};
|
|
|
|
static GstStaticPadTemplate ogg_demux_src_template_factory =
|
|
GST_STATIC_PAD_TEMPLATE ("src_%d",
|
|
GST_PAD_SRC,
|
|
GST_PAD_SOMETIMES,
|
|
GST_STATIC_CAPS_ANY);
|
|
|
|
static GstStaticPadTemplate ogg_demux_sink_template_factory =
|
|
GST_STATIC_PAD_TEMPLATE ("sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("application/ogg; application/x-annodex")
|
|
);
|
|
|
|
static void gst_ogg_demux_finalize (GObject * object);
|
|
|
|
static GstFlowReturn gst_ogg_demux_read_chain (GstOggDemux * ogg,
|
|
GstOggChain ** chain);
|
|
static GstFlowReturn gst_ogg_demux_read_end_chain (GstOggDemux * ogg,
|
|
GstOggChain * chain);
|
|
|
|
static gboolean gst_ogg_demux_sink_event (GstPad * pad, GstEvent * event);
|
|
static void gst_ogg_demux_loop (GstOggPad * pad);
|
|
static GstFlowReturn gst_ogg_demux_chain (GstPad * pad, GstBuffer * buffer);
|
|
static gboolean gst_ogg_demux_sink_activate (GstPad * sinkpad);
|
|
static gboolean gst_ogg_demux_sink_activate_pull (GstPad * sinkpad,
|
|
gboolean active);
|
|
static gboolean gst_ogg_demux_sink_activate_push (GstPad * sinkpad,
|
|
gboolean active);
|
|
static GstStateChangeReturn gst_ogg_demux_change_state (GstElement * element,
|
|
GstStateChange transition);
|
|
static gboolean gst_ogg_demux_send_event (GstOggDemux * ogg, GstEvent * event);
|
|
|
|
static void gst_ogg_print (GstOggDemux * demux);
|
|
|
|
#define gst_ogg_demux_parent_class parent_class
|
|
G_DEFINE_TYPE (GstOggDemux, gst_ogg_demux, GST_TYPE_ELEMENT);
|
|
|
|
static void
|
|
gst_ogg_demux_class_init (GstOggDemuxClass * klass)
|
|
{
|
|
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
|
|
gst_element_class_set_details_simple (gstelement_class,
|
|
"Ogg demuxer", "Codec/Demuxer",
|
|
"demux ogg streams (info about ogg: http://xiph.org)",
|
|
"Wim Taymans <wim@fluendo.com>");
|
|
|
|
gst_element_class_add_pad_template (gstelement_class,
|
|
gst_static_pad_template_get (&ogg_demux_sink_template_factory));
|
|
gst_element_class_add_pad_template (gstelement_class,
|
|
gst_static_pad_template_get (&ogg_demux_src_template_factory));
|
|
|
|
gstelement_class->change_state = gst_ogg_demux_change_state;
|
|
gstelement_class->send_event = gst_ogg_demux_receive_event;
|
|
|
|
gobject_class->finalize = gst_ogg_demux_finalize;
|
|
}
|
|
|
|
static void
|
|
gst_ogg_demux_init (GstOggDemux * ogg)
|
|
{
|
|
/* create the sink pad */
|
|
ogg->sinkpad =
|
|
gst_pad_new_from_static_template (&ogg_demux_sink_template_factory,
|
|
"sink");
|
|
|
|
gst_pad_set_event_function (ogg->sinkpad, gst_ogg_demux_sink_event);
|
|
gst_pad_set_chain_function (ogg->sinkpad, gst_ogg_demux_chain);
|
|
gst_pad_set_activate_function (ogg->sinkpad, gst_ogg_demux_sink_activate);
|
|
gst_pad_set_activatepull_function (ogg->sinkpad,
|
|
gst_ogg_demux_sink_activate_pull);
|
|
gst_pad_set_activatepush_function (ogg->sinkpad,
|
|
gst_ogg_demux_sink_activate_push);
|
|
gst_element_add_pad (GST_ELEMENT (ogg), ogg->sinkpad);
|
|
|
|
ogg->chain_lock = g_mutex_new ();
|
|
ogg->chains = g_array_new (FALSE, TRUE, sizeof (GstOggChain *));
|
|
|
|
ogg->newsegment = NULL;
|
|
}
|
|
|
|
static void
|
|
gst_ogg_demux_finalize (GObject * object)
|
|
{
|
|
GstOggDemux *ogg;
|
|
|
|
ogg = GST_OGG_DEMUX (object);
|
|
|
|
g_array_free (ogg->chains, TRUE);
|
|
g_mutex_free (ogg->chain_lock);
|
|
ogg_sync_clear (&ogg->sync);
|
|
|
|
if (ogg->newsegment)
|
|
gst_event_unref (ogg->newsegment);
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static void
|
|
gst_ogg_demux_reset_streams (GstOggDemux * ogg)
|
|
{
|
|
GstOggChain *chain;
|
|
guint i;
|
|
|
|
chain = ogg->current_chain;
|
|
if (chain == NULL)
|
|
return;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *stream = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
stream->start_time = -1;
|
|
stream->map.accumulated_granule = 0;
|
|
}
|
|
ogg->building_chain = chain;
|
|
ogg->current_chain = NULL;
|
|
ogg->resync = TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ogg_demux_sink_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
gboolean res;
|
|
GstOggDemux *ogg;
|
|
|
|
ogg = GST_OGG_DEMUX (gst_pad_get_parent (pad));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_START:
|
|
res = gst_ogg_demux_send_event (ogg, event);
|
|
break;
|
|
case GST_EVENT_FLUSH_STOP:
|
|
GST_DEBUG_OBJECT (ogg, "got a flush stop event");
|
|
ogg_sync_reset (&ogg->sync);
|
|
res = gst_ogg_demux_send_event (ogg, event);
|
|
gst_ogg_demux_reset_streams (ogg);
|
|
break;
|
|
case GST_EVENT_SEGMENT:
|
|
GST_DEBUG_OBJECT (ogg, "got a new segment event");
|
|
gst_event_unref (event);
|
|
res = TRUE;
|
|
break;
|
|
case GST_EVENT_EOS:
|
|
{
|
|
GST_DEBUG_OBJECT (ogg, "got an EOS event");
|
|
res = gst_ogg_demux_send_event (ogg, event);
|
|
if (ogg->current_chain == NULL) {
|
|
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL),
|
|
("can't get first chain"));
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
res = gst_ogg_demux_send_event (ogg, event);
|
|
break;
|
|
}
|
|
gst_object_unref (ogg);
|
|
|
|
return res;
|
|
}
|
|
|
|
/* submit the given buffer to the ogg sync */
|
|
static GstFlowReturn
|
|
gst_ogg_demux_submit_buffer (GstOggDemux * ogg, GstBuffer * buffer)
|
|
{
|
|
gsize size;
|
|
guint8 *data;
|
|
gchar *oggbuffer;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
|
|
data = gst_buffer_map (buffer, &size, NULL, GST_MAP_READ);
|
|
|
|
GST_DEBUG_OBJECT (ogg, "submitting %" G_GSIZE_FORMAT " bytes", size);
|
|
if (G_UNLIKELY (size == 0))
|
|
goto done;
|
|
|
|
oggbuffer = ogg_sync_buffer (&ogg->sync, size);
|
|
if (G_UNLIKELY (oggbuffer == NULL))
|
|
goto no_buffer;
|
|
|
|
memcpy (oggbuffer, data, size);
|
|
if (G_UNLIKELY (ogg_sync_wrote (&ogg->sync, size) < 0))
|
|
goto write_failed;
|
|
|
|
done:
|
|
gst_buffer_unmap (buffer, data, size);
|
|
gst_buffer_unref (buffer);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
no_buffer:
|
|
{
|
|
GST_ELEMENT_ERROR (ogg, STREAM, DECODE,
|
|
(NULL), ("failed to get ogg sync buffer"));
|
|
ret = GST_FLOW_ERROR;
|
|
goto done;
|
|
}
|
|
write_failed:
|
|
{
|
|
GST_ELEMENT_ERROR (ogg, STREAM, DECODE,
|
|
(NULL), ("failed to write %d bytes to the sync buffer", size));
|
|
ret = GST_FLOW_ERROR;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* in random access mode this code updates the current read position
|
|
* and resets the ogg sync buffer so that the next read will happen
|
|
* from this new location.
|
|
*/
|
|
static void
|
|
gst_ogg_demux_seek (GstOggDemux * ogg, gint64 offset)
|
|
{
|
|
GST_LOG_OBJECT (ogg, "seeking to %" G_GINT64_FORMAT, offset);
|
|
|
|
ogg->offset = offset;
|
|
ogg->read_offset = offset;
|
|
ogg_sync_reset (&ogg->sync);
|
|
}
|
|
|
|
/* read more data from the current offset and submit to
|
|
* the ogg sync layer.
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_demux_get_data (GstOggDemux * ogg, gint64 end_offset)
|
|
{
|
|
GstFlowReturn ret;
|
|
GstBuffer *buffer;
|
|
|
|
GST_LOG_OBJECT (ogg,
|
|
"get data %" G_GINT64_FORMAT " %" G_GINT64_FORMAT " %" G_GINT64_FORMAT,
|
|
ogg->read_offset, ogg->length, end_offset);
|
|
|
|
if (end_offset > 0 && ogg->read_offset >= end_offset)
|
|
goto boundary_reached;
|
|
|
|
if (ogg->read_offset == ogg->length)
|
|
goto eos;
|
|
|
|
ret = gst_pad_pull_range (ogg->sinkpad, ogg->read_offset, CHUNKSIZE, &buffer);
|
|
if (ret != GST_FLOW_OK)
|
|
goto error;
|
|
|
|
ogg->read_offset += gst_buffer_get_size (buffer);
|
|
|
|
ret = gst_ogg_demux_submit_buffer (ogg, buffer);
|
|
|
|
return ret;
|
|
|
|
/* ERROR */
|
|
boundary_reached:
|
|
{
|
|
GST_LOG_OBJECT (ogg, "reached boundary");
|
|
return GST_FLOW_LIMIT;
|
|
}
|
|
eos:
|
|
{
|
|
GST_LOG_OBJECT (ogg, "reached EOS");
|
|
return GST_FLOW_UNEXPECTED;
|
|
}
|
|
error:
|
|
{
|
|
GST_WARNING_OBJECT (ogg, "got %d (%s) from pull range", ret,
|
|
gst_flow_get_name (ret));
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Read the next page from the current offset.
|
|
* boundary: number of bytes ahead we allow looking for;
|
|
* -1 if no boundary
|
|
*
|
|
* @offset will contain the offset the next page starts at when this function
|
|
* returns GST_FLOW_OK.
|
|
*
|
|
* GST_FLOW_UNEXPECTED is returned on EOS.
|
|
*
|
|
* GST_FLOW_LIMIT is returned when we did not find a page before the
|
|
* boundary. If @boundary is -1, this is never returned.
|
|
*
|
|
* Any other error returned while retrieving data from the peer is returned as
|
|
* is.
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_demux_get_next_page (GstOggDemux * ogg, ogg_page * og,
|
|
gint64 boundary, gint64 * offset)
|
|
{
|
|
gint64 end_offset = -1;
|
|
GstFlowReturn ret;
|
|
|
|
GST_LOG_OBJECT (ogg,
|
|
"get next page, current offset %" G_GINT64_FORMAT ", bytes boundary %"
|
|
G_GINT64_FORMAT, ogg->offset, boundary);
|
|
|
|
if (boundary >= 0)
|
|
end_offset = ogg->offset + boundary;
|
|
|
|
while (TRUE) {
|
|
glong more;
|
|
|
|
if (end_offset > 0 && ogg->offset >= end_offset)
|
|
goto boundary_reached;
|
|
|
|
more = ogg_sync_pageseek (&ogg->sync, og);
|
|
|
|
GST_LOG_OBJECT (ogg, "pageseek gave %ld", more);
|
|
|
|
if (more < 0) {
|
|
/* skipped n bytes */
|
|
ogg->offset -= more;
|
|
GST_LOG_OBJECT (ogg, "skipped %ld bytes, offset %" G_GINT64_FORMAT,
|
|
more, ogg->offset);
|
|
} else if (more == 0) {
|
|
/* we need more data */
|
|
if (boundary == 0)
|
|
goto boundary_reached;
|
|
|
|
GST_LOG_OBJECT (ogg, "need more data");
|
|
ret = gst_ogg_demux_get_data (ogg, end_offset);
|
|
if (ret != GST_FLOW_OK)
|
|
break;
|
|
} else {
|
|
gint64 res_offset = ogg->offset;
|
|
|
|
/* got a page. Return the offset at the page beginning,
|
|
advance the internal offset past the page end */
|
|
if (offset)
|
|
*offset = res_offset;
|
|
ret = GST_FLOW_OK;
|
|
|
|
ogg->offset += more;
|
|
|
|
GST_LOG_OBJECT (ogg,
|
|
"got page at %" G_GINT64_FORMAT ", serial %08x, end at %"
|
|
G_GINT64_FORMAT ", granule %" G_GINT64_FORMAT, res_offset,
|
|
ogg_page_serialno (og), ogg->offset,
|
|
(gint64) ogg_page_granulepos (og));
|
|
break;
|
|
}
|
|
}
|
|
GST_LOG_OBJECT (ogg, "returning %d", ret);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
boundary_reached:
|
|
{
|
|
GST_LOG_OBJECT (ogg,
|
|
"offset %" G_GINT64_FORMAT " >= end_offset %" G_GINT64_FORMAT,
|
|
ogg->offset, end_offset);
|
|
return GST_FLOW_LIMIT;
|
|
}
|
|
}
|
|
|
|
/* from the current offset, find the previous page, seeking backwards
|
|
* until we find the page.
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_demux_get_prev_page (GstOggDemux * ogg, ogg_page * og, gint64 * offset)
|
|
{
|
|
GstFlowReturn ret;
|
|
gint64 begin = ogg->offset;
|
|
gint64 end = begin;
|
|
gint64 cur_offset = -1;
|
|
|
|
GST_LOG_OBJECT (ogg, "getting page before %" G_GINT64_FORMAT, begin);
|
|
|
|
while (cur_offset == -1) {
|
|
begin -= CHUNKSIZE;
|
|
if (begin < 0)
|
|
begin = 0;
|
|
|
|
/* seek CHUNKSIZE back */
|
|
gst_ogg_demux_seek (ogg, begin);
|
|
|
|
/* now continue reading until we run out of data, if we find a page
|
|
* start, we save it. It might not be the final page as there could be
|
|
* another page after this one. */
|
|
while (ogg->offset < end) {
|
|
gint64 new_offset;
|
|
|
|
ret =
|
|
gst_ogg_demux_get_next_page (ogg, og, end - ogg->offset, &new_offset);
|
|
/* we hit the upper limit, offset contains the last page start */
|
|
if (ret == GST_FLOW_LIMIT) {
|
|
GST_LOG_OBJECT (ogg, "hit limit");
|
|
break;
|
|
}
|
|
/* something went wrong */
|
|
if (ret == GST_FLOW_UNEXPECTED) {
|
|
new_offset = 0;
|
|
GST_LOG_OBJECT (ogg, "got unexpected");
|
|
} else if (ret != GST_FLOW_OK) {
|
|
GST_LOG_OBJECT (ogg, "got error %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
GST_LOG_OBJECT (ogg, "found page at %" G_GINT64_FORMAT, new_offset);
|
|
|
|
/* offset is next page start */
|
|
cur_offset = new_offset;
|
|
}
|
|
}
|
|
|
|
GST_LOG_OBJECT (ogg, "found previous page at %" G_GINT64_FORMAT, cur_offset);
|
|
|
|
/* we have the offset. Actually snork and hold the page now */
|
|
gst_ogg_demux_seek (ogg, cur_offset);
|
|
ret = gst_ogg_demux_get_next_page (ogg, og, -1, NULL);
|
|
if (ret != GST_FLOW_OK) {
|
|
GST_WARNING_OBJECT (ogg, "can't get last page at %" G_GINT64_FORMAT,
|
|
cur_offset);
|
|
/* this shouldn't be possible */
|
|
return ret;
|
|
}
|
|
|
|
if (offset)
|
|
*offset = cur_offset;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ogg_demux_deactivate_current_chain (GstOggDemux * ogg)
|
|
{
|
|
gint i;
|
|
GstOggChain *chain = ogg->current_chain;
|
|
|
|
if (chain == NULL)
|
|
return TRUE;
|
|
|
|
GST_DEBUG_OBJECT (ogg, "deactivating chain %p", chain);
|
|
|
|
/* send EOS on all the pads */
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
GstEvent *event;
|
|
|
|
if (!pad->added)
|
|
continue;
|
|
|
|
event = gst_event_new_eos ();
|
|
gst_event_set_seqnum (event, ogg->seqnum);
|
|
gst_pad_push_event (GST_PAD_CAST (pad), event);
|
|
|
|
GST_DEBUG_OBJECT (ogg, "removing pad %" GST_PTR_FORMAT, pad);
|
|
|
|
/* deactivate first */
|
|
gst_pad_set_active (GST_PAD_CAST (pad), FALSE);
|
|
|
|
gst_element_remove_pad (GST_ELEMENT (ogg), GST_PAD_CAST (pad));
|
|
|
|
pad->added = FALSE;
|
|
}
|
|
/* if we cannot seek back to the chain, we can destroy the chain
|
|
* completely */
|
|
if (!ogg->pullmode) {
|
|
gst_ogg_chain_free (chain);
|
|
}
|
|
ogg->current_chain = NULL;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
GstCaps *
|
|
gst_ogg_demux_set_header_on_caps (GstOggDemux * ogg, GstCaps * caps,
|
|
GList * headers)
|
|
{
|
|
GstStructure *structure;
|
|
GValue array = { 0 };
|
|
|
|
GST_LOG_OBJECT (ogg, "caps: %" GST_PTR_FORMAT, caps);
|
|
|
|
if (G_UNLIKELY (!caps))
|
|
return NULL;
|
|
if (G_UNLIKELY (!headers))
|
|
return NULL;
|
|
|
|
caps = gst_caps_make_writable (caps);
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
|
|
g_value_init (&array, GST_TYPE_ARRAY);
|
|
|
|
while (headers) {
|
|
GValue value = { 0 };
|
|
GstBuffer *buffer;
|
|
ogg_packet *op = headers->data;
|
|
g_assert (op);
|
|
buffer = gst_buffer_new_and_alloc (op->bytes);
|
|
gst_buffer_fill (buffer, 0, op->packet, op->bytes);
|
|
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_IN_CAPS);
|
|
g_value_init (&value, GST_TYPE_BUFFER);
|
|
gst_value_take_buffer (&value, buffer);
|
|
gst_value_array_append_value (&array, &value);
|
|
g_value_unset (&value);
|
|
headers = headers->next;
|
|
}
|
|
|
|
gst_structure_set_value (structure, "streamheader", &array);
|
|
g_value_unset (&array);
|
|
GST_LOG_OBJECT (ogg, "here are the newly set caps: %" GST_PTR_FORMAT, caps);
|
|
|
|
return caps;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ogg_demux_activate_chain (GstOggDemux * ogg, GstOggChain * chain,
|
|
GstEvent * event)
|
|
{
|
|
gint i;
|
|
gint bitrate, idx_bitrate;
|
|
|
|
g_return_val_if_fail (chain != NULL, FALSE);
|
|
|
|
if (chain == ogg->current_chain) {
|
|
if (event)
|
|
gst_event_unref (event);
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
GST_DEBUG_OBJECT (ogg, "activating chain %p", chain);
|
|
|
|
bitrate = idx_bitrate = 0;
|
|
|
|
/* first add the pads */
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad;
|
|
|
|
pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
if (pad->map.idx_bitrate)
|
|
idx_bitrate = MAX (idx_bitrate, pad->map.idx_bitrate);
|
|
|
|
bitrate += pad->map.bitrate;
|
|
|
|
/* mark discont */
|
|
gst_ogg_pad_mark_discont (pad);
|
|
pad->last_ret = GST_FLOW_OK;
|
|
|
|
if (pad->map.is_skeleton || pad->added
|
|
|| !gst_pad_has_current_caps (GST_PAD_CAST (pad)))
|
|
continue;
|
|
|
|
GST_DEBUG_OBJECT (ogg, "adding pad %" GST_PTR_FORMAT, pad);
|
|
|
|
/* activate first */
|
|
gst_pad_set_active (GST_PAD_CAST (pad), TRUE);
|
|
|
|
gst_element_add_pad (GST_ELEMENT (ogg), GST_PAD_CAST (pad));
|
|
pad->added = TRUE;
|
|
}
|
|
/* prefer the index bitrate over the ones encoded in the streams */
|
|
ogg->bitrate = (idx_bitrate ? idx_bitrate : bitrate);
|
|
|
|
/* after adding the new pads, remove the old pads */
|
|
gst_ogg_demux_deactivate_current_chain (ogg);
|
|
|
|
ogg->current_chain = chain;
|
|
|
|
/* we are finished now */
|
|
gst_element_no_more_pads (GST_ELEMENT (ogg));
|
|
|
|
/* FIXME, must be sent from the streaming thread */
|
|
if (event) {
|
|
gst_ogg_demux_send_event (ogg, event);
|
|
|
|
gst_element_found_tags (GST_ELEMENT_CAST (ogg),
|
|
gst_tag_list_new_full (GST_TAG_CONTAINER_FORMAT, "Ogg", NULL));
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (ogg, "starting chain");
|
|
|
|
/* then send out any headers and queued packets */
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GList *walk;
|
|
GstOggPad *pad;
|
|
|
|
pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
/* FIXME also streaming thread */
|
|
if (pad->map.taglist) {
|
|
GST_DEBUG_OBJECT (ogg, "pushing tags");
|
|
gst_element_found_tags_for_pad (GST_ELEMENT_CAST (ogg),
|
|
GST_PAD_CAST (pad), pad->map.taglist);
|
|
pad->map.taglist = NULL;
|
|
}
|
|
|
|
/* Set headers on caps */
|
|
pad->map.caps =
|
|
gst_ogg_demux_set_header_on_caps (ogg, pad->map.caps, pad->map.headers);
|
|
gst_pad_set_caps (GST_PAD_CAST (pad), pad->map.caps);
|
|
|
|
GST_DEBUG_OBJECT (ogg, "pushing headers");
|
|
/* push headers */
|
|
for (walk = pad->map.headers; walk; walk = g_list_next (walk)) {
|
|
ogg_packet *p = walk->data;
|
|
|
|
gst_ogg_demux_chain_peer (pad, p, TRUE);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (ogg, "pushing queued buffers");
|
|
/* push queued packets */
|
|
for (walk = pad->map.queued; walk; walk = g_list_next (walk)) {
|
|
ogg_packet *p = walk->data;
|
|
|
|
gst_ogg_demux_chain_peer (pad, p, TRUE);
|
|
_ogg_packet_free (p);
|
|
}
|
|
/* and free the queued buffers */
|
|
g_list_free (pad->map.queued);
|
|
pad->map.queued = NULL;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
do_binary_search (GstOggDemux * ogg, GstOggChain * chain, gint64 begin,
|
|
gint64 end, gint64 begintime, gint64 endtime, gint64 target,
|
|
gint64 * offset)
|
|
{
|
|
gint64 best;
|
|
GstFlowReturn ret;
|
|
gint64 result = 0;
|
|
|
|
best = begin;
|
|
|
|
GST_DEBUG_OBJECT (ogg,
|
|
"chain offset %" G_GINT64_FORMAT ", end offset %" G_GINT64_FORMAT,
|
|
begin, end);
|
|
GST_DEBUG_OBJECT (ogg,
|
|
"chain begin time %" GST_TIME_FORMAT ", end time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (begintime), GST_TIME_ARGS (endtime));
|
|
GST_DEBUG_OBJECT (ogg, "target %" GST_TIME_FORMAT, GST_TIME_ARGS (target));
|
|
|
|
/* perform the seek */
|
|
while (begin < end) {
|
|
gint64 bisect;
|
|
|
|
if ((end - begin < CHUNKSIZE) || (endtime == begintime)) {
|
|
bisect = begin;
|
|
} else {
|
|
/* take a (pretty decent) guess, avoiding overflow */
|
|
gint64 rate = (end - begin) * GST_MSECOND / (endtime - begintime);
|
|
|
|
bisect = (target - begintime) / GST_MSECOND * rate + begin - CHUNKSIZE;
|
|
|
|
if (bisect <= begin)
|
|
bisect = begin;
|
|
GST_DEBUG_OBJECT (ogg, "Initial guess: %" G_GINT64_FORMAT, bisect);
|
|
}
|
|
gst_ogg_demux_seek (ogg, bisect);
|
|
|
|
while (begin < end) {
|
|
ogg_page og;
|
|
|
|
GST_DEBUG_OBJECT (ogg,
|
|
"after seek, bisect %" G_GINT64_FORMAT ", begin %" G_GINT64_FORMAT
|
|
", end %" G_GINT64_FORMAT, bisect, begin, end);
|
|
|
|
ret = gst_ogg_demux_get_next_page (ogg, &og, end - ogg->offset, &result);
|
|
GST_LOG_OBJECT (ogg, "looking for next page returned %" G_GINT64_FORMAT,
|
|
result);
|
|
|
|
if (ret == GST_FLOW_LIMIT) {
|
|
/* we hit the upper limit, go back a bit */
|
|
if (bisect <= begin + 1) {
|
|
end = begin; /* found it */
|
|
} else {
|
|
if (bisect == 0)
|
|
goto seek_error;
|
|
|
|
bisect -= CHUNKSIZE;
|
|
if (bisect <= begin)
|
|
bisect = begin + 1;
|
|
|
|
gst_ogg_demux_seek (ogg, bisect);
|
|
}
|
|
} else if (ret == GST_FLOW_OK) {
|
|
/* found offset of next ogg page */
|
|
gint64 granulepos;
|
|
GstClockTime granuletime;
|
|
GstOggPad *pad;
|
|
|
|
/* get the granulepos */
|
|
GST_LOG_OBJECT (ogg, "found next ogg page at %" G_GINT64_FORMAT,
|
|
result);
|
|
granulepos = ogg_page_granulepos (&og);
|
|
if (granulepos == -1) {
|
|
GST_LOG_OBJECT (ogg, "granulepos of next page is -1");
|
|
continue;
|
|
}
|
|
|
|
/* get the stream */
|
|
pad = gst_ogg_chain_get_stream (chain, ogg_page_serialno (&og));
|
|
if (pad == NULL || pad->map.is_skeleton)
|
|
continue;
|
|
|
|
/* convert granulepos to time */
|
|
granuletime = gst_ogg_stream_get_end_time_for_granulepos (&pad->map,
|
|
granulepos);
|
|
if (granuletime < pad->start_time)
|
|
continue;
|
|
|
|
GST_LOG_OBJECT (ogg, "granulepos %" G_GINT64_FORMAT " maps to time %"
|
|
GST_TIME_FORMAT, granulepos, GST_TIME_ARGS (granuletime));
|
|
|
|
granuletime -= pad->start_time;
|
|
granuletime += chain->begin_time;
|
|
|
|
GST_DEBUG_OBJECT (ogg,
|
|
"found page with granule %" G_GINT64_FORMAT " and time %"
|
|
GST_TIME_FORMAT, granulepos, GST_TIME_ARGS (granuletime));
|
|
|
|
if (granuletime < target) {
|
|
best = result; /* raw offset of packet with granulepos */
|
|
begin = ogg->offset; /* raw offset of next page */
|
|
begintime = granuletime;
|
|
|
|
bisect = begin; /* *not* begin + 1 */
|
|
} else {
|
|
if (bisect <= begin + 1) {
|
|
end = begin; /* found it */
|
|
} else {
|
|
if (end == ogg->offset) { /* we're pretty close - we'd be stuck in */
|
|
end = result;
|
|
bisect -= CHUNKSIZE; /* an endless loop otherwise. */
|
|
if (bisect <= begin)
|
|
bisect = begin + 1;
|
|
gst_ogg_demux_seek (ogg, bisect);
|
|
} else {
|
|
end = result;
|
|
endtime = granuletime;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} else
|
|
goto seek_error;
|
|
}
|
|
}
|
|
GST_DEBUG_OBJECT (ogg, "seeking to %" G_GINT64_FORMAT, best);
|
|
gst_ogg_demux_seek (ogg, best);
|
|
*offset = best;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
seek_error:
|
|
{
|
|
GST_DEBUG_OBJECT (ogg, "got a seek error");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
do_index_search (GstOggDemux * ogg, GstOggChain * chain, gint64 begin,
|
|
gint64 end, gint64 begintime, gint64 endtime, gint64 target,
|
|
gint64 * p_offset, gint64 * p_timestamp)
|
|
{
|
|
guint i;
|
|
guint64 timestamp, offset;
|
|
guint64 r_timestamp, r_offset;
|
|
gboolean result = FALSE;
|
|
|
|
target -= begintime;
|
|
|
|
r_offset = -1;
|
|
r_timestamp = -1;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
timestamp = target;
|
|
if (gst_ogg_map_search_index (&pad->map, TRUE, ×tamp, &offset)) {
|
|
GST_INFO ("found %" G_GUINT64_FORMAT " at offset %" G_GUINT64_FORMAT,
|
|
timestamp, offset);
|
|
|
|
if (r_offset == -1 || offset < r_offset) {
|
|
r_offset = offset;
|
|
r_timestamp = timestamp;
|
|
}
|
|
result |= TRUE;
|
|
}
|
|
}
|
|
|
|
if (p_timestamp)
|
|
*p_timestamp = r_timestamp;
|
|
if (p_offset)
|
|
*p_offset = r_offset;
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* do seek to time @position, return FALSE or chain and TRUE
|
|
*/
|
|
static gboolean
|
|
gst_ogg_demux_do_seek (GstOggDemux * ogg, GstSegment * segment,
|
|
gboolean accurate, gboolean keyframe, GstOggChain ** rchain)
|
|
{
|
|
guint64 position;
|
|
GstOggChain *chain = NULL;
|
|
gint64 begin, end;
|
|
gint64 begintime, endtime;
|
|
gint64 target, keytarget;
|
|
gint64 best;
|
|
gint64 total;
|
|
gint64 result = 0;
|
|
GstFlowReturn ret;
|
|
gint i, pending, len;
|
|
gboolean first_parsed_page = TRUE;
|
|
|
|
position = segment->position;
|
|
|
|
/* first find the chain to search in */
|
|
total = ogg->total_time;
|
|
if (ogg->chains->len == 0)
|
|
goto no_chains;
|
|
|
|
for (i = ogg->chains->len - 1; i >= 0; i--) {
|
|
chain = g_array_index (ogg->chains, GstOggChain *, i);
|
|
total -= chain->total_time;
|
|
if (position >= total)
|
|
break;
|
|
}
|
|
|
|
/* first step, locate page containing the required data */
|
|
begin = chain->offset;
|
|
end = chain->end_offset;
|
|
begintime = chain->begin_time;
|
|
endtime = begintime + chain->total_time;
|
|
target = position - total + begintime;
|
|
|
|
if (!do_binary_search (ogg, chain, begin, end, begintime, endtime, target,
|
|
&best))
|
|
goto seek_error;
|
|
|
|
/* second step: find pages for all streams, we use the keyframe_granule to keep
|
|
* track of which ones we saw. If we have seen a page for each stream we can
|
|
* calculate the positions of each keyframe. */
|
|
GST_DEBUG_OBJECT (ogg, "find keyframes");
|
|
len = pending = chain->streams->len;
|
|
|
|
/* figure out where the keyframes are */
|
|
keytarget = target;
|
|
|
|
while (TRUE) {
|
|
ogg_page og;
|
|
gint64 granulepos;
|
|
GstOggPad *pad;
|
|
GstClockTime keyframe_time, granule_time;
|
|
|
|
ret = gst_ogg_demux_get_next_page (ogg, &og, end - ogg->offset, &result);
|
|
GST_LOG_OBJECT (ogg, "looking for next page returned %" G_GINT64_FORMAT,
|
|
result);
|
|
if (ret == GST_FLOW_LIMIT) {
|
|
GST_LOG_OBJECT (ogg, "reached limit");
|
|
break;
|
|
} else if (ret != GST_FLOW_OK)
|
|
goto seek_error;
|
|
|
|
/* get the stream */
|
|
pad = gst_ogg_chain_get_stream (chain, ogg_page_serialno (&og));
|
|
if (pad == NULL)
|
|
continue;
|
|
|
|
if (pad->map.is_skeleton)
|
|
goto next;
|
|
|
|
granulepos = ogg_page_granulepos (&og);
|
|
if (granulepos == -1 || granulepos == 0) {
|
|
GST_LOG_OBJECT (ogg, "granulepos of next page is -1");
|
|
continue;
|
|
}
|
|
|
|
/* we only do this the first time we pass here */
|
|
if (first_parsed_page) {
|
|
/* Now that we have a time reference from the page, we can check
|
|
* whether all streams still have pages from here on.
|
|
*
|
|
* This would be more elegant before the loop, but getting the page from
|
|
* there without breaking anything would be more costly */
|
|
granule_time = gst_ogg_stream_get_end_time_for_granulepos (&pad->map,
|
|
granulepos);
|
|
for (i = 0; i < len; i++) {
|
|
GstOggPad *stream = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
if (stream == pad)
|
|
/* we already know we have at least one page (the current one)
|
|
* for this stream */
|
|
continue;
|
|
|
|
if (granule_time > stream->map.total_time)
|
|
/* we won't encounter any more pages of this stream, so we don't
|
|
* try finding a key frame for it */
|
|
pending--;
|
|
}
|
|
first_parsed_page = FALSE;
|
|
}
|
|
|
|
|
|
/* in reverse we want to go past the page with the lower timestamp */
|
|
if (segment->rate < 0.0) {
|
|
/* get time for this pad */
|
|
granule_time = gst_ogg_stream_get_end_time_for_granulepos (&pad->map,
|
|
granulepos);
|
|
|
|
GST_LOG_OBJECT (ogg,
|
|
"looking at page with ts %" GST_TIME_FORMAT ", target %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (granule_time),
|
|
GST_TIME_ARGS (target));
|
|
if (granule_time < target)
|
|
continue;
|
|
}
|
|
|
|
/* we've seen this pad before */
|
|
if (pad->keyframe_granule != -1)
|
|
continue;
|
|
|
|
/* convert granule of this pad to the granule of the keyframe */
|
|
pad->keyframe_granule =
|
|
gst_ogg_stream_granulepos_to_key_granule (&pad->map, granulepos);
|
|
GST_LOG_OBJECT (ogg, "marking stream granule %" G_GINT64_FORMAT,
|
|
pad->keyframe_granule);
|
|
|
|
/* get time of the keyframe */
|
|
keyframe_time =
|
|
gst_ogg_stream_granule_to_time (&pad->map, pad->keyframe_granule);
|
|
GST_LOG_OBJECT (ogg, "stream %08lx granule time %" GST_TIME_FORMAT,
|
|
pad->map.serialno, GST_TIME_ARGS (keyframe_time));
|
|
|
|
/* collect smallest value */
|
|
if (keyframe_time != -1) {
|
|
keyframe_time += begintime;
|
|
if (keyframe_time < keytarget)
|
|
keytarget = keyframe_time;
|
|
}
|
|
|
|
next:
|
|
pending--;
|
|
if (pending == 0)
|
|
break;
|
|
}
|
|
|
|
/* for negative rates we will get to the keyframe backwards */
|
|
if (segment->rate < 0.0)
|
|
goto done;
|
|
|
|
if (keytarget != target) {
|
|
GST_LOG_OBJECT (ogg, "final seek to target %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (keytarget));
|
|
|
|
/* last step, seek to the location of the keyframe */
|
|
if (!do_binary_search (ogg, chain, begin, end, begintime, endtime,
|
|
keytarget, &best))
|
|
goto seek_error;
|
|
} else {
|
|
/* seek back to previous position */
|
|
GST_LOG_OBJECT (ogg, "keyframe on target");
|
|
gst_ogg_demux_seek (ogg, best);
|
|
}
|
|
|
|
done:
|
|
if (keyframe) {
|
|
if (segment->rate > 0.0)
|
|
segment->time = keytarget;
|
|
segment->position = keytarget - begintime;
|
|
}
|
|
|
|
*rchain = chain;
|
|
|
|
return TRUE;
|
|
|
|
no_chains:
|
|
{
|
|
GST_DEBUG_OBJECT (ogg, "no chains");
|
|
return FALSE;
|
|
}
|
|
seek_error:
|
|
{
|
|
GST_DEBUG_OBJECT (ogg, "got a seek error");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* does not take ownership of the event */
|
|
static gboolean
|
|
gst_ogg_demux_perform_seek_pull (GstOggDemux * ogg, GstEvent * event)
|
|
{
|
|
GstOggChain *chain = NULL;
|
|
gboolean res;
|
|
gboolean flush, accurate, keyframe;
|
|
GstFormat format;
|
|
gdouble rate;
|
|
GstSeekFlags flags;
|
|
GstSeekType cur_type, stop_type;
|
|
gint64 cur, stop;
|
|
gboolean update;
|
|
guint32 seqnum;
|
|
GstEvent *tevent;
|
|
|
|
if (event) {
|
|
GST_DEBUG_OBJECT (ogg, "seek with event");
|
|
|
|
gst_event_parse_seek (event, &rate, &format, &flags,
|
|
&cur_type, &cur, &stop_type, &stop);
|
|
|
|
/* we can only seek on time */
|
|
if (format != GST_FORMAT_TIME) {
|
|
GST_DEBUG_OBJECT (ogg, "can only seek on TIME");
|
|
goto error;
|
|
}
|
|
seqnum = gst_event_get_seqnum (event);
|
|
} else {
|
|
GST_DEBUG_OBJECT (ogg, "seek without event");
|
|
|
|
flags = 0;
|
|
rate = 1.0;
|
|
seqnum = gst_util_seqnum_next ();
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (ogg, "seek, rate %g", rate);
|
|
|
|
flush = flags & GST_SEEK_FLAG_FLUSH;
|
|
accurate = flags & GST_SEEK_FLAG_ACCURATE;
|
|
keyframe = flags & GST_SEEK_FLAG_KEY_UNIT;
|
|
|
|
/* first step is to unlock the streaming thread if it is
|
|
* blocked in a chain call, we do this by starting the flush. because
|
|
* we cannot yet hold any streaming lock, we have to protect the chains
|
|
* with their own lock. */
|
|
if (flush) {
|
|
gint i;
|
|
|
|
tevent = gst_event_new_flush_start ();
|
|
gst_event_set_seqnum (tevent, seqnum);
|
|
|
|
gst_event_ref (tevent);
|
|
gst_pad_push_event (ogg->sinkpad, tevent);
|
|
|
|
GST_CHAIN_LOCK (ogg);
|
|
for (i = 0; i < ogg->chains->len; i++) {
|
|
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
|
|
gint j;
|
|
|
|
for (j = 0; j < chain->streams->len; j++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, j);
|
|
|
|
gst_event_ref (tevent);
|
|
gst_pad_push_event (GST_PAD (pad), tevent);
|
|
}
|
|
}
|
|
GST_CHAIN_UNLOCK (ogg);
|
|
|
|
gst_event_unref (tevent);
|
|
} else {
|
|
gst_pad_pause_task (ogg->sinkpad);
|
|
}
|
|
|
|
/* now grab the stream lock so that streaming cannot continue, for
|
|
* non flushing seeks when the element is in PAUSED this could block
|
|
* forever. */
|
|
GST_PAD_STREAM_LOCK (ogg->sinkpad);
|
|
|
|
if (event) {
|
|
gst_segment_do_seek (&ogg->segment, rate, format, flags,
|
|
cur_type, cur, stop_type, stop, &update);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (ogg, "segment positions set to %" GST_TIME_FORMAT "-%"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (ogg->segment.start),
|
|
GST_TIME_ARGS (ogg->segment.stop));
|
|
|
|
/* we need to stop flushing on the srcpad as we're going to use it
|
|
* next. We can do this as we have the STREAM lock now. */
|
|
if (flush) {
|
|
tevent = gst_event_new_flush_stop ();
|
|
gst_event_set_seqnum (tevent, seqnum);
|
|
gst_pad_push_event (ogg->sinkpad, tevent);
|
|
}
|
|
|
|
{
|
|
gint i;
|
|
|
|
/* reset all ogg streams now, need to do this from within the lock to
|
|
* make sure the streaming thread is not messing with the stream */
|
|
for (i = 0; i < ogg->chains->len; i++) {
|
|
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
|
|
|
|
gst_ogg_chain_reset (chain);
|
|
}
|
|
}
|
|
|
|
/* for reverse we will already seek accurately */
|
|
res = gst_ogg_demux_do_seek (ogg, &ogg->segment, accurate, keyframe, &chain);
|
|
|
|
/* seek failed, make sure we continue the current chain */
|
|
if (!res) {
|
|
GST_DEBUG_OBJECT (ogg, "seek failed");
|
|
chain = ogg->current_chain;
|
|
} else {
|
|
GST_DEBUG_OBJECT (ogg, "seek success");
|
|
}
|
|
|
|
if (!chain)
|
|
goto no_chain;
|
|
|
|
/* now we have a new position, prepare for streaming again */
|
|
{
|
|
GstEvent *event;
|
|
gint64 stop;
|
|
gint64 start;
|
|
gint64 position, begin_time;
|
|
GstSegment segment;
|
|
|
|
/* we have to send the flush to the old chain, not the new one */
|
|
if (flush) {
|
|
tevent = gst_event_new_flush_stop ();
|
|
gst_event_set_seqnum (tevent, seqnum);
|
|
gst_ogg_demux_send_event (ogg, tevent);
|
|
}
|
|
|
|
/* we need this to see how far inside the chain we need to start */
|
|
if (chain->begin_time != GST_CLOCK_TIME_NONE)
|
|
begin_time = chain->begin_time;
|
|
else
|
|
begin_time = 0;
|
|
|
|
/* segment.start gives the start over all chains, we calculate the amount
|
|
* of time into this chain we need to start */
|
|
start = ogg->segment.start - begin_time;
|
|
if (chain->segment_start != GST_CLOCK_TIME_NONE)
|
|
start += chain->segment_start;
|
|
|
|
if ((stop = ogg->segment.stop) == -1)
|
|
stop = ogg->segment.duration;
|
|
|
|
/* segment.stop gives the stop time over all chains, calculate the amount of
|
|
* time we need to stop in this chain */
|
|
if (stop != -1) {
|
|
if (stop > begin_time)
|
|
stop -= begin_time;
|
|
else
|
|
stop = 0;
|
|
stop += chain->segment_start;
|
|
/* we must stop when this chain ends and switch to the next chain to play
|
|
* the remainder of the segment. */
|
|
stop = MIN (stop, chain->segment_stop);
|
|
}
|
|
|
|
position = ogg->segment.position;
|
|
if (chain->segment_start != GST_CLOCK_TIME_NONE)
|
|
position += chain->segment_start;
|
|
|
|
gst_segment_copy_into (&ogg->segment, &segment);
|
|
|
|
/* create the segment event we are going to send out */
|
|
if (ogg->segment.rate >= 0.0) {
|
|
segment.start = position;
|
|
segment.stop = stop;
|
|
} else {
|
|
segment.start = start;
|
|
segment.stop = position;
|
|
}
|
|
event = gst_event_new_segment (&segment);
|
|
gst_event_set_seqnum (event, seqnum);
|
|
|
|
if (chain != ogg->current_chain) {
|
|
/* switch to different chain, send segment on new chain */
|
|
gst_ogg_demux_activate_chain (ogg, chain, event);
|
|
} else {
|
|
/* mark discont and send segment on current chain */
|
|
gst_ogg_chain_mark_discont (chain);
|
|
/* This event should be sent from the streaming thread (sink pad task) */
|
|
if (ogg->newsegment)
|
|
gst_event_unref (ogg->newsegment);
|
|
ogg->newsegment = event;
|
|
}
|
|
|
|
/* notify start of new segment */
|
|
if (ogg->segment.flags & GST_SEEK_FLAG_SEGMENT) {
|
|
GstMessage *message;
|
|
|
|
message = gst_message_new_segment_start (GST_OBJECT (ogg),
|
|
GST_FORMAT_TIME, ogg->segment.position);
|
|
gst_message_set_seqnum (message, seqnum);
|
|
|
|
gst_element_post_message (GST_ELEMENT (ogg), message);
|
|
}
|
|
|
|
ogg->seqnum = seqnum;
|
|
/* restart our task since it might have been stopped when we did the
|
|
* flush. */
|
|
gst_pad_start_task (ogg->sinkpad, (GstTaskFunction) gst_ogg_demux_loop,
|
|
ogg->sinkpad);
|
|
}
|
|
|
|
/* streaming can continue now */
|
|
GST_PAD_STREAM_UNLOCK (ogg->sinkpad);
|
|
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
error:
|
|
{
|
|
GST_DEBUG_OBJECT (ogg, "seek failed");
|
|
return FALSE;
|
|
}
|
|
no_chain:
|
|
{
|
|
GST_DEBUG_OBJECT (ogg, "no chain to seek in");
|
|
GST_PAD_STREAM_UNLOCK (ogg->sinkpad);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_ogg_demux_perform_seek_push (GstOggDemux * ogg, GstEvent * event)
|
|
{
|
|
gint bitrate;
|
|
gboolean res = TRUE;
|
|
GstFormat format;
|
|
gdouble rate;
|
|
GstSeekFlags flags;
|
|
GstSeekType start_type, stop_type;
|
|
gint64 start, stop;
|
|
GstEvent *sevent;
|
|
GstOggChain *chain;
|
|
gint64 best, best_time;
|
|
|
|
gst_event_parse_seek (event, &rate, &format, &flags,
|
|
&start_type, &start, &stop_type, &stop);
|
|
|
|
if (format != GST_FORMAT_TIME) {
|
|
GST_DEBUG_OBJECT (ogg, "can only seek on TIME");
|
|
goto error;
|
|
}
|
|
|
|
chain = ogg->current_chain;
|
|
if (!chain)
|
|
return FALSE;
|
|
|
|
if (do_index_search (ogg, chain, 0, -1, 0, -1, start, &best, &best_time)) {
|
|
/* the index gave some result */
|
|
GST_DEBUG_OBJECT (ogg,
|
|
"found offset %" G_GINT64_FORMAT " with time %" G_GUINT64_FORMAT,
|
|
best, best_time);
|
|
start = best;
|
|
} else if ((bitrate = ogg->bitrate) > 0) {
|
|
/* try with bitrate convert the seek positions to bytes */
|
|
if (start_type != GST_SEEK_TYPE_NONE) {
|
|
start = gst_util_uint64_scale (start, bitrate, 8 * GST_SECOND);
|
|
}
|
|
if (stop_type != GST_SEEK_TYPE_NONE) {
|
|
stop = gst_util_uint64_scale (stop, bitrate, 8 * GST_SECOND);
|
|
}
|
|
} else {
|
|
/* we don't know */
|
|
res = FALSE;
|
|
}
|
|
|
|
if (res) {
|
|
GST_DEBUG_OBJECT (ogg,
|
|
"seeking to %" G_GINT64_FORMAT " - %" G_GINT64_FORMAT, start, stop);
|
|
/* do seek */
|
|
sevent = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
|
|
start_type, start, stop_type, stop);
|
|
|
|
res = gst_pad_push_event (ogg->sinkpad, sevent);
|
|
}
|
|
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
error:
|
|
{
|
|
GST_DEBUG_OBJECT (ogg, "seek failed");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_ogg_demux_perform_seek (GstOggDemux * ogg, GstEvent * event)
|
|
{
|
|
gboolean res;
|
|
|
|
if (ogg->pullmode) {
|
|
res = gst_ogg_demux_perform_seek_pull (ogg, event);
|
|
} else {
|
|
res = gst_ogg_demux_perform_seek_push (ogg, event);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
/* finds each bitstream link one at a time using a bisection search
|
|
* (has to begin by knowing the offset of the lb's initial page).
|
|
* Recurses for each link so it can alloc the link storage after
|
|
* finding them all, then unroll and fill the cache at the same time
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_demux_bisect_forward_serialno (GstOggDemux * ogg,
|
|
gint64 begin, gint64 searched, gint64 end, GstOggChain * chain, glong m)
|
|
{
|
|
gint64 endsearched = end;
|
|
gint64 next = end;
|
|
ogg_page og;
|
|
GstFlowReturn ret;
|
|
gint64 offset;
|
|
GstOggChain *nextchain;
|
|
|
|
GST_LOG_OBJECT (ogg,
|
|
"bisect begin: %" G_GINT64_FORMAT ", searched: %" G_GINT64_FORMAT
|
|
", end %" G_GINT64_FORMAT ", chain: %p", begin, searched, end, chain);
|
|
|
|
/* the below guards against garbage seperating the last and
|
|
* first pages of two links. */
|
|
while (searched < endsearched) {
|
|
gint64 bisect;
|
|
|
|
if (endsearched - searched < CHUNKSIZE) {
|
|
bisect = searched;
|
|
} else {
|
|
bisect = (searched + endsearched) / 2;
|
|
}
|
|
|
|
gst_ogg_demux_seek (ogg, bisect);
|
|
ret = gst_ogg_demux_get_next_page (ogg, &og, -1, &offset);
|
|
|
|
if (ret == GST_FLOW_UNEXPECTED) {
|
|
endsearched = bisect;
|
|
} else if (ret == GST_FLOW_OK) {
|
|
glong serial = ogg_page_serialno (&og);
|
|
|
|
if (!gst_ogg_chain_has_stream (chain, serial)) {
|
|
endsearched = bisect;
|
|
next = offset;
|
|
} else {
|
|
searched = offset + og.header_len + og.body_len;
|
|
}
|
|
} else
|
|
return ret;
|
|
}
|
|
|
|
GST_LOG_OBJECT (ogg, "current chain ends at %" G_GINT64_FORMAT, searched);
|
|
|
|
chain->end_offset = searched;
|
|
ret = gst_ogg_demux_read_end_chain (ogg, chain);
|
|
if (ret != GST_FLOW_OK)
|
|
return ret;
|
|
|
|
GST_LOG_OBJECT (ogg, "found begin at %" G_GINT64_FORMAT, next);
|
|
|
|
gst_ogg_demux_seek (ogg, next);
|
|
ret = gst_ogg_demux_read_chain (ogg, &nextchain);
|
|
if (ret == GST_FLOW_UNEXPECTED) {
|
|
nextchain = NULL;
|
|
ret = GST_FLOW_OK;
|
|
GST_LOG_OBJECT (ogg, "no next chain");
|
|
} else if (ret != GST_FLOW_OK)
|
|
goto done;
|
|
|
|
if (searched < end && nextchain != NULL) {
|
|
ret = gst_ogg_demux_bisect_forward_serialno (ogg, next, ogg->offset,
|
|
end, nextchain, m + 1);
|
|
if (ret != GST_FLOW_OK)
|
|
goto done;
|
|
}
|
|
GST_LOG_OBJECT (ogg, "adding chain %p", chain);
|
|
|
|
g_array_insert_val (ogg->chains, 0, chain);
|
|
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
/* read a chain from the ogg file. This code will
|
|
* read all BOS pages and will create and return a GstOggChain
|
|
* structure with the results.
|
|
*
|
|
* This function will also read N pages from each stream in the
|
|
* chain and submit them to the decoders. When the decoder has
|
|
* decoded the first buffer, we know the timestamp of the first
|
|
* page in the chain.
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_demux_read_chain (GstOggDemux * ogg, GstOggChain ** res_chain)
|
|
{
|
|
GstFlowReturn ret;
|
|
GstOggChain *chain = NULL;
|
|
gint64 offset = ogg->offset;
|
|
ogg_page op;
|
|
gboolean done;
|
|
gint i;
|
|
|
|
GST_LOG_OBJECT (ogg, "reading chain at %" G_GINT64_FORMAT, offset);
|
|
|
|
/* first read the BOS pages, do typefind on them, create
|
|
* the decoders, send data to the decoders. */
|
|
while (TRUE) {
|
|
GstOggPad *pad;
|
|
glong serial;
|
|
|
|
ret = gst_ogg_demux_get_next_page (ogg, &op, -1, NULL);
|
|
if (ret != GST_FLOW_OK) {
|
|
GST_WARNING_OBJECT (ogg, "problem reading BOS page: ret=%d", ret);
|
|
break;
|
|
}
|
|
if (!ogg_page_bos (&op)) {
|
|
GST_WARNING_OBJECT (ogg, "page is not BOS page");
|
|
/* if we did not find a chain yet, assume this is a bogus stream and
|
|
* ignore it */
|
|
if (!chain)
|
|
ret = GST_FLOW_UNEXPECTED;
|
|
break;
|
|
}
|
|
|
|
if (chain == NULL) {
|
|
chain = gst_ogg_chain_new (ogg);
|
|
chain->offset = offset;
|
|
}
|
|
|
|
serial = ogg_page_serialno (&op);
|
|
if (gst_ogg_chain_get_stream (chain, serial) != NULL) {
|
|
GST_WARNING_OBJECT (ogg, "found serial %08lx BOS page twice, ignoring",
|
|
serial);
|
|
continue;
|
|
}
|
|
|
|
pad = gst_ogg_chain_new_stream (chain, serial);
|
|
gst_ogg_pad_submit_page (pad, &op);
|
|
}
|
|
|
|
if (ret != GST_FLOW_OK || chain == NULL) {
|
|
if (ret == GST_FLOW_OK) {
|
|
GST_WARNING_OBJECT (ogg, "no chain was found");
|
|
ret = GST_FLOW_ERROR;
|
|
} else if (ret != GST_FLOW_UNEXPECTED) {
|
|
GST_WARNING_OBJECT (ogg, "failed to read chain");
|
|
} else {
|
|
GST_DEBUG_OBJECT (ogg, "done reading chains");
|
|
}
|
|
if (chain) {
|
|
gst_ogg_chain_free (chain);
|
|
}
|
|
if (res_chain)
|
|
*res_chain = NULL;
|
|
return ret;
|
|
}
|
|
|
|
chain->have_bos = TRUE;
|
|
GST_LOG_OBJECT (ogg, "read bos pages, init decoder now");
|
|
|
|
/* now read pages until we receive a buffer from each of the
|
|
* stream decoders, this will tell us the timestamp of the
|
|
* first packet in the chain then */
|
|
|
|
/* save the offset to the first non bos page in the chain: if searching for
|
|
* pad->first_time we read past the end of the chain, we'll seek back to this
|
|
* position
|
|
*/
|
|
offset = ogg->offset;
|
|
|
|
done = FALSE;
|
|
while (!done) {
|
|
glong serial;
|
|
gboolean known_serial = FALSE;
|
|
GstFlowReturn ret;
|
|
|
|
serial = ogg_page_serialno (&op);
|
|
done = TRUE;
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
GST_LOG_OBJECT (ogg, "serial %08lx time %" GST_TIME_FORMAT,
|
|
pad->map.serialno, GST_TIME_ARGS (pad->start_time));
|
|
|
|
if (pad->map.serialno == serial) {
|
|
known_serial = TRUE;
|
|
|
|
/* submit the page now, this will fill in the start_time when the
|
|
* internal decoder finds it */
|
|
gst_ogg_pad_submit_page (pad, &op);
|
|
|
|
if (!pad->map.is_skeleton && pad->start_time == -1
|
|
&& ogg_page_eos (&op)) {
|
|
/* got EOS on a pad before we could find its start_time.
|
|
* We have no chance of finding a start_time for every pad so
|
|
* stop searching for the other start_time(s).
|
|
*/
|
|
done = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
/* the timestamp will be filled in when we submit the pages */
|
|
if (!pad->map.is_sparse)
|
|
done &= (pad->start_time != GST_CLOCK_TIME_NONE);
|
|
|
|
GST_LOG_OBJECT (ogg, "done %08lx now %d", pad->map.serialno, done);
|
|
}
|
|
|
|
/* we read a page not belonging to the current chain: seek back to the
|
|
* beginning of the chain
|
|
*/
|
|
if (!known_serial) {
|
|
GST_LOG_OBJECT (ogg, "unknown serial %08lx", serial);
|
|
gst_ogg_demux_seek (ogg, offset);
|
|
break;
|
|
}
|
|
|
|
if (!done) {
|
|
ret = gst_ogg_demux_get_next_page (ogg, &op, -1, NULL);
|
|
if (ret != GST_FLOW_OK)
|
|
break;
|
|
}
|
|
}
|
|
GST_LOG_OBJECT (ogg, "done reading chain");
|
|
/* now we can fill in the missing info using queries */
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
if (pad->map.is_skeleton)
|
|
continue;
|
|
|
|
pad->mode = GST_OGG_PAD_MODE_STREAMING;
|
|
}
|
|
|
|
if (res_chain)
|
|
*res_chain = chain;
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* read the last pages from the ogg stream to get the final
|
|
* page end_offsets.
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_demux_read_end_chain (GstOggDemux * ogg, GstOggChain * chain)
|
|
{
|
|
gint64 begin = chain->end_offset;
|
|
gint64 end = begin;
|
|
gint64 last_granule = -1;
|
|
GstOggPad *last_pad = NULL;
|
|
GstFlowReturn ret;
|
|
gboolean done = FALSE;
|
|
ogg_page og;
|
|
gint i;
|
|
|
|
while (!done) {
|
|
begin -= CHUNKSIZE;
|
|
if (begin < 0)
|
|
begin = 0;
|
|
|
|
gst_ogg_demux_seek (ogg, begin);
|
|
|
|
/* now continue reading until we run out of data, if we find a page
|
|
* start, we save it. It might not be the final page as there could be
|
|
* another page after this one. */
|
|
while (ogg->offset < end) {
|
|
ret = gst_ogg_demux_get_next_page (ogg, &og, end - ogg->offset, NULL);
|
|
|
|
if (ret == GST_FLOW_LIMIT)
|
|
break;
|
|
if (ret != GST_FLOW_OK)
|
|
return ret;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
if (pad->map.is_sparse)
|
|
continue;
|
|
|
|
if (pad->map.serialno == ogg_page_serialno (&og)) {
|
|
gint64 granulepos = ogg_page_granulepos (&og);
|
|
|
|
if (granulepos != -1) {
|
|
last_granule = granulepos;
|
|
last_pad = pad;
|
|
done = TRUE;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (last_pad) {
|
|
chain->segment_stop =
|
|
gst_ogg_stream_get_end_time_for_granulepos (&last_pad->map,
|
|
last_granule);
|
|
} else {
|
|
chain->segment_stop = GST_CLOCK_TIME_NONE;
|
|
}
|
|
|
|
GST_INFO ("segment stop %" G_GUINT64_FORMAT, chain->segment_stop);
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* find a pad with a given serial number
|
|
*/
|
|
static GstOggPad *
|
|
gst_ogg_demux_find_pad (GstOggDemux * ogg, glong serialno)
|
|
{
|
|
GstOggPad *pad;
|
|
gint i;
|
|
|
|
/* first look in building chain if any */
|
|
if (ogg->building_chain) {
|
|
pad = gst_ogg_chain_get_stream (ogg->building_chain, serialno);
|
|
if (pad)
|
|
return pad;
|
|
}
|
|
|
|
/* then look in current chain if any */
|
|
if (ogg->current_chain) {
|
|
pad = gst_ogg_chain_get_stream (ogg->current_chain, serialno);
|
|
if (pad)
|
|
return pad;
|
|
}
|
|
|
|
for (i = 0; i < ogg->chains->len; i++) {
|
|
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
|
|
|
|
pad = gst_ogg_chain_get_stream (chain, serialno);
|
|
if (pad)
|
|
return pad;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* find a chain with a given serial number
|
|
*/
|
|
static GstOggChain *
|
|
gst_ogg_demux_find_chain (GstOggDemux * ogg, glong serialno)
|
|
{
|
|
GstOggPad *pad;
|
|
|
|
pad = gst_ogg_demux_find_pad (ogg, serialno);
|
|
if (pad) {
|
|
return pad->chain;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* returns TRUE if all streams have valid start time */
|
|
static gboolean
|
|
gst_ogg_demux_collect_chain_info (GstOggDemux * ogg, GstOggChain * chain)
|
|
{
|
|
gboolean res = TRUE;
|
|
|
|
chain->total_time = GST_CLOCK_TIME_NONE;
|
|
GST_DEBUG_OBJECT (ogg, "trying to collect chain info");
|
|
|
|
/* see if we have a start time on all streams */
|
|
chain->segment_start = gst_ogg_demux_collect_start_time (ogg, chain);
|
|
|
|
if (chain->segment_start == G_MAXUINT64) {
|
|
/* not yet, stream some more data */
|
|
res = FALSE;
|
|
} else if (chain->segment_stop != GST_CLOCK_TIME_NONE) {
|
|
/* we can calculate a total time */
|
|
chain->total_time = chain->segment_stop - chain->segment_start;
|
|
}
|
|
|
|
GST_DEBUG ("total time %" G_GUINT64_FORMAT, chain->total_time);
|
|
|
|
GST_DEBUG_OBJECT (ogg, "return %d", res);
|
|
|
|
return res;
|
|
}
|
|
|
|
static void
|
|
gst_ogg_demux_collect_info (GstOggDemux * ogg)
|
|
{
|
|
gint i;
|
|
|
|
/* collect all info */
|
|
ogg->total_time = 0;
|
|
|
|
for (i = 0; i < ogg->chains->len; i++) {
|
|
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
|
|
|
|
chain->begin_time = ogg->total_time;
|
|
|
|
gst_ogg_demux_collect_chain_info (ogg, chain);
|
|
|
|
ogg->total_time += chain->total_time;
|
|
}
|
|
ogg->segment.duration = ogg->total_time;
|
|
}
|
|
|
|
/* find all the chains in the ogg file, this reads the first and
|
|
* last page of the ogg stream, if they match then the ogg file has
|
|
* just one chain, else we do a binary search for all chains.
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_demux_find_chains (GstOggDemux * ogg)
|
|
{
|
|
ogg_page og;
|
|
GstPad *peer;
|
|
GstFormat format;
|
|
gboolean res;
|
|
gulong serialno;
|
|
GstOggChain *chain;
|
|
GstFlowReturn ret;
|
|
|
|
/* get peer to figure out length */
|
|
if ((peer = gst_pad_get_peer (ogg->sinkpad)) == NULL)
|
|
goto no_peer;
|
|
|
|
/* find length to read last page, we store this for later use. */
|
|
format = GST_FORMAT_BYTES;
|
|
res = gst_pad_query_duration (peer, &format, &ogg->length);
|
|
gst_object_unref (peer);
|
|
if (!res || ogg->length <= 0)
|
|
goto no_length;
|
|
|
|
GST_DEBUG_OBJECT (ogg, "file length %" G_GINT64_FORMAT, ogg->length);
|
|
|
|
/* read chain from offset 0, this is the first chain of the
|
|
* ogg file. */
|
|
gst_ogg_demux_seek (ogg, 0);
|
|
ret = gst_ogg_demux_read_chain (ogg, &chain);
|
|
if (ret != GST_FLOW_OK)
|
|
goto no_first_chain;
|
|
|
|
/* read page from end offset, we use this page to check if its serial
|
|
* number is contained in the first chain. If this is the case then
|
|
* this ogg is not a chained ogg and we can skip the scanning. */
|
|
gst_ogg_demux_seek (ogg, ogg->length);
|
|
ret = gst_ogg_demux_get_prev_page (ogg, &og, NULL);
|
|
if (ret != GST_FLOW_OK)
|
|
goto no_last_page;
|
|
|
|
serialno = ogg_page_serialno (&og);
|
|
|
|
if (!gst_ogg_chain_has_stream (chain, serialno)) {
|
|
/* the last page is not in the first stream, this means we should
|
|
* find all the chains in this chained ogg. */
|
|
ret =
|
|
gst_ogg_demux_bisect_forward_serialno (ogg, 0, 0, ogg->length, chain,
|
|
0);
|
|
} else {
|
|
/* we still call this function here but with an empty range so that
|
|
* we can reuse the setup code in this routine. */
|
|
ret =
|
|
gst_ogg_demux_bisect_forward_serialno (ogg, 0, ogg->length,
|
|
ogg->length, chain, 0);
|
|
}
|
|
if (ret != GST_FLOW_OK)
|
|
goto done;
|
|
|
|
/* all fine, collect and print */
|
|
gst_ogg_demux_collect_info (ogg);
|
|
|
|
/* dump our chains and streams */
|
|
gst_ogg_print (ogg);
|
|
|
|
done:
|
|
return ret;
|
|
|
|
/*** error cases ***/
|
|
no_peer:
|
|
{
|
|
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL), ("we don't have a peer"));
|
|
return GST_FLOW_NOT_LINKED;
|
|
}
|
|
no_length:
|
|
{
|
|
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL), ("can't get file length"));
|
|
return GST_FLOW_NOT_SUPPORTED;
|
|
}
|
|
no_first_chain:
|
|
{
|
|
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL), ("can't get first chain"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
no_last_page:
|
|
{
|
|
GST_DEBUG_OBJECT (ogg, "can't get last page");
|
|
if (chain)
|
|
gst_ogg_chain_free (chain);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_ogg_demux_handle_page (GstOggDemux * ogg, ogg_page * page)
|
|
{
|
|
GstOggPad *pad;
|
|
gint64 granule;
|
|
glong serialno;
|
|
GstFlowReturn result = GST_FLOW_OK;
|
|
|
|
serialno = ogg_page_serialno (page);
|
|
granule = ogg_page_granulepos (page);
|
|
|
|
GST_LOG_OBJECT (ogg,
|
|
"processing ogg page (serial %08lx, pageno %ld, granulepos %"
|
|
G_GINT64_FORMAT ", bos %d)",
|
|
serialno, ogg_page_pageno (page), granule, ogg_page_bos (page));
|
|
|
|
if (ogg_page_bos (page)) {
|
|
GstOggChain *chain;
|
|
|
|
/* first page */
|
|
/* see if we know about the chain already */
|
|
chain = gst_ogg_demux_find_chain (ogg, serialno);
|
|
if (chain) {
|
|
GstEvent *event;
|
|
gint64 start = 0;
|
|
GstSegment segment;
|
|
|
|
if (chain->segment_start != GST_CLOCK_TIME_NONE)
|
|
start = chain->segment_start;
|
|
|
|
/* create the newsegment event we are going to send out */
|
|
gst_segment_copy_into (&ogg->segment, &segment);
|
|
segment.start = start;
|
|
segment.stop = chain->segment_stop;
|
|
segment.time = chain->begin_time;
|
|
event = gst_event_new_segment (&segment);
|
|
gst_event_set_seqnum (event, ogg->seqnum);
|
|
|
|
GST_DEBUG_OBJECT (ogg,
|
|
"segment: start %" GST_TIME_FORMAT ", stop %" GST_TIME_FORMAT
|
|
", time %" GST_TIME_FORMAT, GST_TIME_ARGS (start),
|
|
GST_TIME_ARGS (chain->segment_stop),
|
|
GST_TIME_ARGS (chain->begin_time));
|
|
|
|
/* activate it as it means we have a non-header, this will also deactivate
|
|
* the currently running chain. */
|
|
gst_ogg_demux_activate_chain (ogg, chain, event);
|
|
pad = gst_ogg_demux_find_pad (ogg, serialno);
|
|
} else {
|
|
GstClockTime chain_time;
|
|
gint64 current_time;
|
|
|
|
/* this can only happen in push mode */
|
|
if (ogg->pullmode)
|
|
goto unknown_chain;
|
|
|
|
current_time = ogg->segment.position;
|
|
|
|
/* time of new chain is current time */
|
|
chain_time = current_time;
|
|
|
|
if (ogg->building_chain == NULL) {
|
|
GstOggChain *newchain;
|
|
|
|
newchain = gst_ogg_chain_new (ogg);
|
|
newchain->offset = 0;
|
|
/* set new chain begin time aligned with end time of old chain */
|
|
newchain->begin_time = chain_time;
|
|
GST_DEBUG_OBJECT (ogg, "new chain, begin time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (chain_time));
|
|
|
|
/* and this is the one we are building now */
|
|
ogg->building_chain = newchain;
|
|
}
|
|
pad = gst_ogg_chain_new_stream (ogg->building_chain, serialno);
|
|
}
|
|
} else {
|
|
pad = gst_ogg_demux_find_pad (ogg, serialno);
|
|
}
|
|
if (pad) {
|
|
result = gst_ogg_pad_submit_page (pad, page);
|
|
} else {
|
|
/* no pad. This means an ogg page without bos has been seen for this
|
|
* serialno. we just ignore it but post a warning... */
|
|
GST_ELEMENT_WARNING (ogg, STREAM, DECODE,
|
|
(NULL), ("unknown ogg pad for serial %08lx detected", serialno));
|
|
return GST_FLOW_OK;
|
|
}
|
|
return result;
|
|
|
|
/* ERRORS */
|
|
unknown_chain:
|
|
{
|
|
GST_ELEMENT_ERROR (ogg, STREAM, DECODE,
|
|
(NULL), ("unknown ogg chain for serial %08lx detected", serialno));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
/* streaming mode, receive a buffer, parse it, create pads for
|
|
* the serialno, submit pages and packets to the oggpads
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_demux_chain (GstPad * pad, GstBuffer * buffer)
|
|
{
|
|
GstOggDemux *ogg;
|
|
gint ret = 0;
|
|
GstFlowReturn result = GST_FLOW_OK;
|
|
|
|
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (pad));
|
|
|
|
GST_DEBUG_OBJECT (ogg, "chain");
|
|
result = gst_ogg_demux_submit_buffer (ogg, buffer);
|
|
|
|
while (result == GST_FLOW_OK) {
|
|
ogg_page page;
|
|
|
|
ret = ogg_sync_pageout (&ogg->sync, &page);
|
|
if (ret == 0)
|
|
/* need more data */
|
|
break;
|
|
if (ret == -1) {
|
|
/* discontinuity in the pages */
|
|
GST_DEBUG_OBJECT (ogg, "discont in page found, continuing");
|
|
} else {
|
|
result = gst_ogg_demux_handle_page (ogg, &page);
|
|
}
|
|
}
|
|
if (ret == 0 || result == GST_FLOW_OK) {
|
|
gst_ogg_demux_sync_streams (ogg);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ogg_demux_send_event (GstOggDemux * ogg, GstEvent * event)
|
|
{
|
|
GstOggChain *chain = ogg->current_chain;
|
|
gboolean res = TRUE;
|
|
|
|
if (chain) {
|
|
gint i;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *pad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
gst_event_ref (event);
|
|
GST_DEBUG_OBJECT (pad, "Pushing event %" GST_PTR_FORMAT, event);
|
|
res &= gst_pad_push_event (GST_PAD (pad), event);
|
|
}
|
|
}
|
|
gst_event_unref (event);
|
|
|
|
return res;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_ogg_demux_combine_flows (GstOggDemux * ogg, GstOggPad * pad,
|
|
GstFlowReturn ret)
|
|
{
|
|
GstOggChain *chain;
|
|
|
|
/* store the value */
|
|
pad->last_ret = ret;
|
|
|
|
/* any other error that is not-linked can be returned right
|
|
* away */
|
|
if (ret != GST_FLOW_NOT_LINKED)
|
|
goto done;
|
|
|
|
/* only return NOT_LINKED if all other pads returned NOT_LINKED */
|
|
chain = ogg->current_chain;
|
|
if (chain) {
|
|
gint i;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *opad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
ret = opad->last_ret;
|
|
/* some other return value (must be SUCCESS but we can return
|
|
* other values as well) */
|
|
if (ret != GST_FLOW_NOT_LINKED)
|
|
goto done;
|
|
}
|
|
/* if we get here, all other pads were unlinked and we return
|
|
* NOT_LINKED then */
|
|
}
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
/* returns TRUE if all streams in current chain reached EOS, FALSE otherwise */
|
|
static gboolean
|
|
gst_ogg_demux_check_eos (GstOggDemux * ogg)
|
|
{
|
|
GstOggChain *chain;
|
|
gboolean eos = TRUE;
|
|
|
|
chain = ogg->current_chain;
|
|
if (G_LIKELY (chain)) {
|
|
gint i;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *opad = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
eos = eos && opad->is_eos;
|
|
}
|
|
} else {
|
|
eos = FALSE;
|
|
}
|
|
|
|
return eos;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_ogg_demux_loop_forward (GstOggDemux * ogg)
|
|
{
|
|
GstFlowReturn ret;
|
|
GstBuffer *buffer;
|
|
|
|
if (ogg->offset == ogg->length) {
|
|
GST_LOG_OBJECT (ogg, "no more data to pull %" G_GINT64_FORMAT
|
|
" == %" G_GINT64_FORMAT, ogg->offset, ogg->length);
|
|
ret = GST_FLOW_UNEXPECTED;
|
|
goto done;
|
|
}
|
|
|
|
GST_LOG_OBJECT (ogg, "pull data %" G_GINT64_FORMAT, ogg->offset);
|
|
ret = gst_pad_pull_range (ogg->sinkpad, ogg->offset, CHUNKSIZE, &buffer);
|
|
if (ret != GST_FLOW_OK) {
|
|
GST_LOG_OBJECT (ogg, "Failed pull_range");
|
|
goto done;
|
|
}
|
|
|
|
ogg->offset += gst_buffer_get_size (buffer);
|
|
|
|
if (G_UNLIKELY (ogg->newsegment)) {
|
|
gst_ogg_demux_send_event (ogg, ogg->newsegment);
|
|
ogg->newsegment = NULL;
|
|
}
|
|
|
|
ret = gst_ogg_demux_chain (ogg->sinkpad, buffer);
|
|
if (ret != GST_FLOW_OK) {
|
|
GST_LOG_OBJECT (ogg, "Failed demux_chain");
|
|
goto done;
|
|
}
|
|
|
|
/* check for the end of the segment */
|
|
if (gst_ogg_demux_check_eos (ogg)) {
|
|
GST_LOG_OBJECT (ogg, "got EOS");
|
|
ret = GST_FLOW_UNEXPECTED;
|
|
goto done;
|
|
}
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
/* reverse mode.
|
|
*
|
|
* We read the pages backwards and send the packets forwards. The first packet
|
|
* in the page will be pushed with the DISCONT flag set.
|
|
*
|
|
* Special care has to be taken for continued pages, which we can only decode
|
|
* when we have the previous page(s).
|
|
*/
|
|
static GstFlowReturn
|
|
gst_ogg_demux_loop_reverse (GstOggDemux * ogg)
|
|
{
|
|
GstFlowReturn ret;
|
|
ogg_page page;
|
|
gint64 offset;
|
|
|
|
if (ogg->offset == 0) {
|
|
GST_LOG_OBJECT (ogg, "no more data to pull %" G_GINT64_FORMAT
|
|
" == 0", ogg->offset);
|
|
ret = GST_FLOW_UNEXPECTED;
|
|
goto done;
|
|
}
|
|
|
|
GST_LOG_OBJECT (ogg, "read page from %" G_GINT64_FORMAT, ogg->offset);
|
|
ret = gst_ogg_demux_get_prev_page (ogg, &page, &offset);
|
|
if (ret != GST_FLOW_OK)
|
|
goto done;
|
|
|
|
ogg->offset = offset;
|
|
|
|
if (G_UNLIKELY (ogg->newsegment)) {
|
|
gst_ogg_demux_send_event (ogg, ogg->newsegment);
|
|
ogg->newsegment = NULL;
|
|
}
|
|
|
|
ret = gst_ogg_demux_handle_page (ogg, &page);
|
|
if (ret != GST_FLOW_OK)
|
|
goto done;
|
|
|
|
/* check for the end of the segment */
|
|
if (gst_ogg_demux_check_eos (ogg)) {
|
|
GST_LOG_OBJECT (ogg, "got EOS");
|
|
ret = GST_FLOW_UNEXPECTED;
|
|
goto done;
|
|
}
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
gst_ogg_demux_sync_streams (GstOggDemux * ogg)
|
|
{
|
|
GstClockTime cur;
|
|
GstOggChain *chain;
|
|
guint i;
|
|
|
|
chain = ogg->current_chain;
|
|
cur = ogg->segment.position;
|
|
if (chain == NULL || cur == -1)
|
|
return;
|
|
|
|
for (i = 0; i < chain->streams->len; i++) {
|
|
GstOggPad *stream = g_array_index (chain->streams, GstOggPad *, i);
|
|
|
|
/* Theoretically, we should be doing this for all streams, but we're only
|
|
* doing it for known-to-be-sparse streams at the moment in order not to
|
|
* break things for wrongly-muxed streams (like we used to produce once) */
|
|
if (stream->map.is_sparse && stream->position != GST_CLOCK_TIME_NONE) {
|
|
|
|
/* Does this stream lag? Random threshold of 2 seconds */
|
|
if (GST_CLOCK_DIFF (stream->position, cur) > (2 * GST_SECOND)) {
|
|
GST_DEBUG_OBJECT (stream, "synchronizing stream with others by "
|
|
"advancing time from %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (stream->position), GST_TIME_ARGS (cur));
|
|
|
|
stream->position = cur;
|
|
|
|
#if 0
|
|
ogg->segment.base += cur - stream->position;
|
|
/* advance stream time (FIXME: is this right, esp. time_pos?) */
|
|
gst_pad_push_event (GST_PAD_CAST (stream),
|
|
gst_event_new_new_segment (TRUE, ogg->segment.rate,
|
|
ogg->segment.applied_rate,
|
|
GST_FORMAT_TIME, stream->position, -1, stream->position));
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* random access code
|
|
*
|
|
* - first find all the chains and streams by scanning the file.
|
|
* - then get and chain buffers, just like the streaming case.
|
|
* - when seeking, we can use the chain info to perform the seek.
|
|
*/
|
|
static void
|
|
gst_ogg_demux_loop (GstOggPad * pad)
|
|
{
|
|
GstOggDemux *ogg;
|
|
GstFlowReturn ret;
|
|
GstEvent *event;
|
|
|
|
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (pad));
|
|
|
|
if (ogg->need_chains) {
|
|
gboolean res;
|
|
|
|
/* this is the only place where we write chains and thus need to lock. */
|
|
GST_CHAIN_LOCK (ogg);
|
|
ret = gst_ogg_demux_find_chains (ogg);
|
|
GST_CHAIN_UNLOCK (ogg);
|
|
if (ret != GST_FLOW_OK)
|
|
goto chain_read_failed;
|
|
|
|
ogg->need_chains = FALSE;
|
|
|
|
GST_OBJECT_LOCK (ogg);
|
|
ogg->running = TRUE;
|
|
event = ogg->event;
|
|
ogg->event = NULL;
|
|
GST_OBJECT_UNLOCK (ogg);
|
|
|
|
/* and seek to configured positions without FLUSH */
|
|
res = gst_ogg_demux_perform_seek_pull (ogg, event);
|
|
if (event)
|
|
gst_event_unref (event);
|
|
|
|
if (!res)
|
|
goto seek_failed;
|
|
}
|
|
|
|
if (ogg->segment.rate >= 0.0)
|
|
ret = gst_ogg_demux_loop_forward (ogg);
|
|
else
|
|
ret = gst_ogg_demux_loop_reverse (ogg);
|
|
|
|
if (ret != GST_FLOW_OK)
|
|
goto pause;
|
|
|
|
gst_ogg_demux_sync_streams (ogg);
|
|
return;
|
|
|
|
/* ERRORS */
|
|
chain_read_failed:
|
|
{
|
|
/* error was posted */
|
|
goto pause;
|
|
}
|
|
seek_failed:
|
|
{
|
|
GST_ELEMENT_ERROR (ogg, STREAM, DEMUX, (NULL),
|
|
("failed to start demuxing ogg"));
|
|
ret = GST_FLOW_ERROR;
|
|
goto pause;
|
|
}
|
|
pause:
|
|
{
|
|
const gchar *reason = gst_flow_get_name (ret);
|
|
GstEvent *event = NULL;
|
|
|
|
GST_LOG_OBJECT (ogg, "pausing task, reason %s", reason);
|
|
gst_pad_pause_task (ogg->sinkpad);
|
|
|
|
if (ret == GST_FLOW_UNEXPECTED) {
|
|
/* perform EOS logic */
|
|
if (ogg->segment.flags & GST_SEEK_FLAG_SEGMENT) {
|
|
gint64 stop;
|
|
GstMessage *message;
|
|
|
|
/* for segment playback we need to post when (in stream time)
|
|
* we stopped, this is either stop (when set) or the duration. */
|
|
if ((stop = ogg->segment.stop) == -1)
|
|
stop = ogg->segment.duration;
|
|
|
|
GST_LOG_OBJECT (ogg, "Sending segment done, at end of segment");
|
|
message =
|
|
gst_message_new_segment_done (GST_OBJECT (ogg), GST_FORMAT_TIME,
|
|
stop);
|
|
gst_message_set_seqnum (message, ogg->seqnum);
|
|
|
|
gst_element_post_message (GST_ELEMENT (ogg), message);
|
|
} else {
|
|
/* normal playback, send EOS to all linked pads */
|
|
GST_LOG_OBJECT (ogg, "Sending EOS, at end of stream");
|
|
event = gst_event_new_eos ();
|
|
}
|
|
} else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_UNEXPECTED) {
|
|
GST_ELEMENT_ERROR (ogg, STREAM, FAILED,
|
|
(_("Internal data stream error.")),
|
|
("stream stopped, reason %s", reason));
|
|
event = gst_event_new_eos ();
|
|
}
|
|
|
|
/* For wrong-state we still want to pause the task and stop
|
|
* but no error message or other things are necessary.
|
|
* wrong-state is no real error and will be caused by flushing,
|
|
* e.g. because of a flushing seek.
|
|
*/
|
|
if (event) {
|
|
gst_event_set_seqnum (event, ogg->seqnum);
|
|
gst_ogg_demux_send_event (ogg, event);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_ogg_demux_clear_chains (GstOggDemux * ogg)
|
|
{
|
|
gint i;
|
|
|
|
gst_ogg_demux_deactivate_current_chain (ogg);
|
|
|
|
GST_CHAIN_LOCK (ogg);
|
|
for (i = 0; i < ogg->chains->len; i++) {
|
|
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
|
|
|
|
gst_ogg_chain_free (chain);
|
|
}
|
|
ogg->chains = g_array_set_size (ogg->chains, 0);
|
|
GST_CHAIN_UNLOCK (ogg);
|
|
}
|
|
|
|
/* this function is called when the pad is activated and should start
|
|
* processing data.
|
|
*
|
|
* We check if we can do random access to decide if we work push or
|
|
* pull based.
|
|
*/
|
|
static gboolean
|
|
gst_ogg_demux_sink_activate (GstPad * sinkpad)
|
|
{
|
|
if (gst_pad_check_pull_range (sinkpad)) {
|
|
GST_DEBUG_OBJECT (sinkpad, "activating pull");
|
|
return gst_pad_activate_pull (sinkpad, TRUE);
|
|
} else {
|
|
GST_DEBUG_OBJECT (sinkpad, "activating push");
|
|
return gst_pad_activate_push (sinkpad, TRUE);
|
|
}
|
|
}
|
|
|
|
/* this function gets called when we activate ourselves in push mode.
|
|
* We cannot seek (ourselves) in the stream */
|
|
static gboolean
|
|
gst_ogg_demux_sink_activate_push (GstPad * sinkpad, gboolean active)
|
|
{
|
|
GstOggDemux *ogg;
|
|
|
|
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (sinkpad));
|
|
|
|
ogg->pullmode = FALSE;
|
|
ogg->resync = FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* this function gets called when we activate ourselves in pull mode.
|
|
* We can perform random access to the resource and we start a task
|
|
* to start reading */
|
|
static gboolean
|
|
gst_ogg_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)
|
|
{
|
|
GstOggDemux *ogg;
|
|
|
|
ogg = GST_OGG_DEMUX (GST_OBJECT_PARENT (sinkpad));
|
|
|
|
if (active) {
|
|
ogg->need_chains = TRUE;
|
|
ogg->pullmode = TRUE;
|
|
|
|
return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_ogg_demux_loop,
|
|
sinkpad);
|
|
} else {
|
|
return gst_pad_stop_task (sinkpad);
|
|
}
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_ogg_demux_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstOggDemux *ogg;
|
|
GstStateChangeReturn result = GST_STATE_CHANGE_FAILURE;
|
|
|
|
ogg = GST_OGG_DEMUX (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
ogg->basetime = 0;
|
|
ogg_sync_init (&ogg->sync);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
ogg_sync_reset (&ogg->sync);
|
|
ogg->running = FALSE;
|
|
ogg->bitrate = 0;
|
|
ogg->total_time = -1;
|
|
gst_segment_init (&ogg->segment, GST_FORMAT_TIME);
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
gst_ogg_demux_clear_chains (ogg);
|
|
GST_OBJECT_LOCK (ogg);
|
|
ogg->running = FALSE;
|
|
GST_OBJECT_UNLOCK (ogg);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
ogg_sync_clear (&ogg->sync);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
gboolean
|
|
gst_ogg_demux_plugin_init (GstPlugin * plugin)
|
|
{
|
|
GST_DEBUG_CATEGORY_INIT (gst_ogg_demux_debug, "oggdemux", 0, "ogg demuxer");
|
|
GST_DEBUG_CATEGORY_INIT (gst_ogg_demux_setup_debug, "oggdemux_setup", 0,
|
|
"ogg demuxer setup stage when parsing pipeline");
|
|
|
|
#ifdef ENABLE_NLS
|
|
GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
|
|
LOCALEDIR);
|
|
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
|
|
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
|
|
#endif
|
|
|
|
return gst_element_register (plugin, "oggdemux", GST_RANK_PRIMARY,
|
|
GST_TYPE_OGG_DEMUX);
|
|
}
|
|
|
|
/* prints all info about the element */
|
|
#undef GST_CAT_DEFAULT
|
|
#define GST_CAT_DEFAULT gst_ogg_demux_setup_debug
|
|
|
|
#ifdef GST_DISABLE_GST_DEBUG
|
|
|
|
static void
|
|
gst_ogg_print (GstOggDemux * ogg)
|
|
{
|
|
/* NOP */
|
|
}
|
|
|
|
#else /* !GST_DISABLE_GST_DEBUG */
|
|
|
|
static void
|
|
gst_ogg_print (GstOggDemux * ogg)
|
|
{
|
|
guint j, i;
|
|
|
|
GST_INFO_OBJECT (ogg, "%u chains", ogg->chains->len);
|
|
GST_INFO_OBJECT (ogg, " total time: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (ogg->total_time));
|
|
|
|
for (i = 0; i < ogg->chains->len; i++) {
|
|
GstOggChain *chain = g_array_index (ogg->chains, GstOggChain *, i);
|
|
|
|
GST_INFO_OBJECT (ogg, " chain %d (%u streams):", i, chain->streams->len);
|
|
GST_INFO_OBJECT (ogg,
|
|
" offset: %" G_GINT64_FORMAT " - %" G_GINT64_FORMAT, chain->offset,
|
|
chain->end_offset);
|
|
GST_INFO_OBJECT (ogg, " begin time: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (chain->begin_time));
|
|
GST_INFO_OBJECT (ogg, " total time: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (chain->total_time));
|
|
GST_INFO_OBJECT (ogg, " segment start: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (chain->segment_start));
|
|
GST_INFO_OBJECT (ogg, " segment stop: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (chain->segment_stop));
|
|
|
|
for (j = 0; j < chain->streams->len; j++) {
|
|
GstOggPad *stream = g_array_index (chain->streams, GstOggPad *, j);
|
|
|
|
GST_INFO_OBJECT (ogg, " stream %08lx:", stream->map.serialno);
|
|
GST_INFO_OBJECT (ogg, " start time: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (stream->start_time));
|
|
}
|
|
}
|
|
}
|
|
#endif /* GST_DISABLE_GST_DEBUG */
|