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098e416ebc
Fixes some printf format strings to make it build on mac.
698 lines
21 KiB
C
698 lines
21 KiB
C
/* GStreamer
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* Copyright (C) 2005 Michael Smith <msmith@fluendo.com>
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*
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* gstoggparse.c: ogg stream parser
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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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/* This ogg parser is essentially a subset of the ogg demuxer - rather than
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* fully demuxing into packets, we only parse out the pages, create one
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* GstBuffer per page, set all the appropriate flags on those pages, set caps
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* appropriately (particularly the 'streamheader' which gives all the header
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* pages required for initialing decode).
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*
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* It's dramatically simpler than the full demuxer as it does not support
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* seeking.
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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 <gst/gst.h>
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#include <ogg/ogg.h>
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#include <string.h>
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#include "gstoggstream.h"
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static const GstElementDetails gst_ogg_parse_details =
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GST_ELEMENT_DETAILS ("Ogg parser",
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"Codec/Parser",
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"parse ogg streams into pages (info about ogg: http://xiph.org)",
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"Michael Smith <msmith@fluendo.com>");
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GST_DEBUG_CATEGORY_STATIC (gst_ogg_parse_debug);
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#define GST_CAT_DEFAULT gst_ogg_parse_debug
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#define GST_TYPE_OGG_PARSE (gst_ogg_parse_get_type())
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#define GST_OGG_PARSE(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OGG_PARSE, GstOggParse))
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#define GST_OGG_PARSE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OGG_PARSE, GstOggParse))
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#define GST_IS_OGG_PARSE(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OGG_PARSE))
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#define GST_IS_OGG_PARSE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OGG_PARSE))
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static GType gst_ogg_parse_get_type (void);
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typedef struct _GstOggParse GstOggParse;
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typedef struct _GstOggParseClass GstOggParseClass;
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struct _GstOggParse
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{
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GstElement element;
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GstPad *sinkpad; /* Sink pad we're reading data from */
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GstPad *srcpad; /* Source pad we're writing to */
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GSList *oggstreams; /* list of GstOggStreams for known streams */
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gint64 offset; /* Current stream offset */
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gboolean in_headers; /* Set if we're reading headers for streams */
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gboolean last_page_not_bos; /* Set if we've seen a non-BOS page */
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ogg_sync_state sync; /* Ogg page synchronisation */
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GstCaps *caps; /* Our src caps */
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};
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struct _GstOggParseClass
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{
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GstElementClass parent_class;
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};
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static void gst_ogg_parse_base_init (gpointer g_class);
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static void gst_ogg_parse_class_init (GstOggParseClass * klass);
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static void gst_ogg_parse_init (GstOggParse * ogg);
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static GstElementClass *parent_class = NULL;
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static GType
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gst_ogg_parse_get_type (void)
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{
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static GType ogg_parse_type = 0;
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if (!ogg_parse_type) {
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static const GTypeInfo ogg_parse_info = {
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sizeof (GstOggParseClass),
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gst_ogg_parse_base_init,
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NULL,
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(GClassInitFunc) gst_ogg_parse_class_init,
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NULL,
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NULL,
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sizeof (GstOggParse),
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0,
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(GInstanceInitFunc) gst_ogg_parse_init,
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};
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ogg_parse_type = g_type_register_static (GST_TYPE_ELEMENT, "GstOggParse",
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&ogg_parse_info, 0);
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}
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return ogg_parse_type;
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}
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static void
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free_stream (GstOggStream * stream)
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{
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g_list_foreach (stream->headers, (GFunc) gst_mini_object_unref, NULL);
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g_list_foreach (stream->unknown_pages, (GFunc) gst_mini_object_unref, NULL);
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g_free (stream);
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}
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static void
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gst_ogg_parse_delete_all_streams (GstOggParse * ogg)
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{
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g_slist_foreach (ogg->oggstreams, (GFunc) free_stream, NULL);
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g_slist_free (ogg->oggstreams);
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ogg->oggstreams = NULL;
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}
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static GstOggStream *
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gst_ogg_parse_new_stream (GstOggParse * parser, ogg_page * page)
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{
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GstOggStream *stream;
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ogg_packet packet;
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int ret;
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guint32 serialno;
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serialno = ogg_page_serialno (page);
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GST_DEBUG_OBJECT (parser, "creating new stream %08x", serialno);
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stream = g_new0 (GstOggStream, 1);
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stream->serialno = serialno;
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stream->in_headers = 1;
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if (ogg_stream_init (&stream->stream, serialno) != 0) {
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GST_ERROR ("Could not initialize ogg_stream struct for serial %08x.",
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serialno);
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return NULL;
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}
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/* FIXME check return */
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ogg_stream_pagein (&stream->stream, page);
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/* FIXME check return */
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ret = ogg_stream_packetout (&stream->stream, &packet);
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if (ret == 1) {
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gst_ogg_stream_setup_map (stream, &packet);
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}
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parser->oggstreams = g_slist_append (parser->oggstreams, stream);
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return stream;
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}
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static GstOggStream *
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gst_ogg_parse_find_stream (GstOggParse * parser, guint32 serialno)
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{
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GSList *l;
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for (l = parser->oggstreams; l != NULL; l = l->next) {
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GstOggStream *stream = (GstOggStream *) l->data;
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if (stream->serialno == serialno)
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return stream;
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}
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return NULL;
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}
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/* signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0
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/* FILL ME */
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};
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static GstStaticPadTemplate ogg_parse_src_template_factory =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("application/ogg")
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);
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static GstStaticPadTemplate ogg_parse_sink_template_factory =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("application/ogg")
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);
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static void gst_ogg_parse_dispose (GObject * object);
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static GstStateChangeReturn gst_ogg_parse_change_state (GstElement * element,
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GstStateChange transition);
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static GstFlowReturn gst_ogg_parse_chain (GstPad * pad, GstBuffer * buffer);
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static void
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gst_ogg_parse_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_set_details (element_class, &gst_ogg_parse_details);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&ogg_parse_sink_template_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&ogg_parse_src_template_factory));
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}
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static void
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gst_ogg_parse_class_init (GstOggParseClass * klass)
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{
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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parent_class = g_type_class_peek_parent (klass);
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gstelement_class->change_state = gst_ogg_parse_change_state;
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gobject_class->dispose = gst_ogg_parse_dispose;
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}
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static void
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gst_ogg_parse_init (GstOggParse * ogg)
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{
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/* create the sink and source pads */
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ogg->sinkpad =
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gst_pad_new_from_static_template (&ogg_parse_sink_template_factory,
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"sink");
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ogg->srcpad =
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gst_pad_new_from_static_template (&ogg_parse_src_template_factory, "src");
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/* TODO: Are there any events we must handle? */
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/* gst_pad_set_event_function (ogg->sinkpad, gst_ogg_parse_handle_event); */
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gst_pad_set_chain_function (ogg->sinkpad, gst_ogg_parse_chain);
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gst_element_add_pad (GST_ELEMENT (ogg), ogg->sinkpad);
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gst_element_add_pad (GST_ELEMENT (ogg), ogg->srcpad);
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ogg->oggstreams = NULL;
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}
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static void
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gst_ogg_parse_dispose (GObject * object)
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{
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GstOggParse *ogg = GST_OGG_PARSE (object);
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GST_LOG_OBJECT (ogg, "Disposing of object %p", ogg);
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ogg_sync_clear (&ogg->sync);
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gst_ogg_parse_delete_all_streams (ogg);
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if (ogg->caps) {
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gst_caps_unref (ogg->caps);
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ogg->caps = NULL;
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}
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if (G_OBJECT_CLASS (parent_class)->dispose)
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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/* submit the given buffer to the ogg sync.
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*
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* Returns the number of bytes submited.
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*/
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static gint
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gst_ogg_parse_submit_buffer (GstOggParse * ogg, GstBuffer * buffer)
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{
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guint size;
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guint8 *data;
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gchar *oggbuffer;
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size = GST_BUFFER_SIZE (buffer);
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data = GST_BUFFER_DATA (buffer);
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/* We now have a buffer, submit it to the ogg sync layer */
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oggbuffer = ogg_sync_buffer (&ogg->sync, size);
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memcpy (oggbuffer, data, size);
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ogg_sync_wrote (&ogg->sync, size);
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/* We've copied all the neccesary data, so we're done with the buffer */
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gst_buffer_unref (buffer);
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return size;
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}
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static void
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gst_ogg_parse_append_header (GValue * array, GstBuffer * buf)
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{
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GValue value = { 0 };
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/* We require a copy to avoid circular refcounts */
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GstBuffer *buffer = gst_buffer_copy (buf);
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GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_IN_CAPS);
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g_value_init (&value, GST_TYPE_BUFFER);
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gst_value_set_buffer (&value, buffer);
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gst_value_array_append_value (array, &value);
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g_value_unset (&value);
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}
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typedef enum
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{
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PAGE_HEADER, /* Header page */
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PAGE_DATA, /* Data page */
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PAGE_PENDING, /* We don't know yet, we'll have to see some future pages */
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} page_type;
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static page_type
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gst_ogg_parse_is_header (GstOggParse * ogg, GstOggStream * stream,
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ogg_page * page)
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{
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ogg_int64_t gpos = ogg_page_granulepos (page);
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if (gpos < 0)
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return PAGE_PENDING;
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/* This is good enough for now, but technically requires codec-specific
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* behaviour to be perfect. This is where we need the mooted library for
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* this stuff, which nobody has written.
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*/
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if (gpos > 0)
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return PAGE_DATA;
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else
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return PAGE_HEADER;
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}
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static GstBuffer *
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gst_ogg_parse_buffer_from_page (ogg_page * page,
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guint64 offset, gboolean delta, GstClockTime timestamp)
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{
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int size = page->header_len + page->body_len;
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GstBuffer *buf = gst_buffer_new_and_alloc (size);
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memcpy (GST_BUFFER_DATA (buf), page->header, page->header_len);
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memcpy (GST_BUFFER_DATA (buf) + page->header_len, page->body, page->body_len);
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GST_BUFFER_TIMESTAMP (buf) = timestamp;
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GST_BUFFER_OFFSET (buf) = offset;
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GST_BUFFER_OFFSET_END (buf) = offset + size;
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return buf;
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}
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/* Reads in buffers, parses them, reframes into one-buffer-per-ogg-page, submits
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* pages to output pad.
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*/
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static GstFlowReturn
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gst_ogg_parse_chain (GstPad * pad, GstBuffer * buffer)
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{
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GstOggParse *ogg;
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GstFlowReturn result = GST_FLOW_OK;
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gint ret = -1;
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guint32 serialno;
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GstBuffer *pagebuffer;
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GstClockTime buffertimestamp = GST_BUFFER_TIMESTAMP (buffer);
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ogg = GST_OGG_PARSE (GST_OBJECT_PARENT (pad));
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GST_LOG_OBJECT (ogg, "Chain function received buffer of size %d",
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GST_BUFFER_SIZE (buffer));
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gst_ogg_parse_submit_buffer (ogg, buffer);
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while (ret != 0 && result == GST_FLOW_OK) {
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ogg_page page;
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/* We use ogg_sync_pageseek() rather than ogg_sync_pageout() so that we can
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* track how many bytes the ogg layer discarded (in the case of sync errors,
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* etc.); this allows us to accurately track the current stream offset
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*/
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ret = ogg_sync_pageseek (&ogg->sync, &page);
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if (ret == 0) {
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/* need more data, that's fine... */
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break;
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} else if (ret < 0) {
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/* discontinuity; track how many bytes we skipped (-ret) */
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ogg->offset -= ret;
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} else {
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gint64 granule = ogg_page_granulepos (&page);
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#ifndef GST_DISABLE_GST_DEBUG
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int bos = ogg_page_bos (&page);
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#endif
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guint64 startoffset = ogg->offset;
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GstOggStream *stream;
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serialno = ogg_page_serialno (&page);
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stream = gst_ogg_parse_find_stream (ogg, serialno);
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GST_LOG_OBJECT (ogg, "Timestamping outgoing buffer as %" GST_TIME_FORMAT,
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GST_TIME_ARGS (buffertimestamp));
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buffertimestamp = gst_ogg_stream_get_end_time_for_granulepos (stream,
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granule);
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pagebuffer = gst_ogg_parse_buffer_from_page (&page, startoffset, FALSE,
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buffertimestamp);
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/* We read out 'ret' bytes, so we set the next offset appropriately */
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ogg->offset += ret;
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GST_LOG_OBJECT (ogg,
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"processing ogg page (serial %08x, pageno %ld, "
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"granule pos %" G_GUINT64_FORMAT ", bos %d, offset %"
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G_GUINT64_FORMAT "-%" G_GUINT64_FORMAT ")",
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serialno, ogg_page_pageno (&page),
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granule, bos, startoffset, ogg->offset);
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if (ogg_page_bos (&page)) {
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/* If we've seen this serialno before, this is technically an error,
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* we log this case but accept it - this one replaces the previous
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* stream with this serialno. We can do this since we're streaming, and
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* not supporting seeking...
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*/
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GstOggStream *stream = gst_ogg_parse_find_stream (ogg, serialno);
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if (stream != NULL) {
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GST_LOG_OBJECT (ogg, "Incorrect stream; repeats serial number %u "
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"at offset %" G_GINT64_FORMAT, serialno, ogg->offset);
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}
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if (ogg->last_page_not_bos) {
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GST_LOG_OBJECT (ogg, "Deleting all referenced streams, found a new "
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"chain starting with serial %u", serialno);
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gst_ogg_parse_delete_all_streams (ogg);
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}
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stream = gst_ogg_parse_new_stream (ogg, &page);
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ogg->last_page_not_bos = FALSE;
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gst_buffer_ref (pagebuffer);
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stream->headers = g_list_append (stream->headers, pagebuffer);
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if (!ogg->in_headers) {
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GST_LOG_OBJECT (ogg,
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"Found start of new chain at offset %" G_GUINT64_FORMAT,
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startoffset);
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ogg->in_headers = 1;
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}
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/* For now, we just keep the header buffer in the stream->headers list;
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* it actually gets output once we've collected the entire set
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*/
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} else {
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/* Non-BOS page. Either: we're outside headers, and this isn't a
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* header (normal data), outside headers and this is (error!), inside
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* headers, this is (append header), or inside headers and this isn't
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* (we've found the end of headers; flush the lot!)
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*
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* Before that, we flag that the last page seen (this one) was not a
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* BOS page; that way we know that when we next see a BOS page it's a
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* new chain, and we can flush all existing streams.
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*/
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page_type type;
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GstOggStream *stream = gst_ogg_parse_find_stream (ogg, serialno);
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if (!stream) {
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GST_LOG_OBJECT (ogg,
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"Non-BOS page unexpectedly found at %" G_GINT64_FORMAT,
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ogg->offset);
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goto failure;
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}
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ogg->last_page_not_bos = TRUE;
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type = gst_ogg_parse_is_header (ogg, stream, &page);
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if (type == PAGE_PENDING && ogg->in_headers) {
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gst_buffer_ref (pagebuffer);
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stream->unknown_pages = g_list_append (stream->unknown_pages,
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pagebuffer);
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} else if (type == PAGE_HEADER) {
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if (!ogg->in_headers) {
|
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GST_LOG_OBJECT (ogg, "Header page unexpectedly found outside "
|
|
"headers at offset %" G_GINT64_FORMAT, ogg->offset);
|
|
goto failure;
|
|
} else {
|
|
/* Append the header to the buffer list, after any unknown previous
|
|
* pages
|
|
*/
|
|
stream->headers = g_list_concat (stream->headers,
|
|
stream->unknown_pages);
|
|
g_list_free (stream->unknown_pages);
|
|
gst_buffer_ref (pagebuffer);
|
|
stream->headers = g_list_append (stream->headers, pagebuffer);
|
|
}
|
|
} else { /* PAGE_DATA, or PAGE_PENDING but outside headers */
|
|
if (ogg->in_headers) {
|
|
/* First non-header page... set caps, flush headers.
|
|
*
|
|
* First up, we build a single GValue list of all the pagebuffers
|
|
* we're using for the headers, in order.
|
|
* Then we set this on the caps structure. Then we can start pushing
|
|
* buffers for the headers, and finally we send this non-header
|
|
* page.
|
|
*/
|
|
GstCaps *caps;
|
|
GstStructure *structure;
|
|
GValue array = { 0 };
|
|
gint count = 0;
|
|
gboolean found_pending_headers = FALSE;
|
|
GSList *l;
|
|
|
|
g_value_init (&array, GST_TYPE_ARRAY);
|
|
|
|
for (l = ogg->oggstreams; l != NULL; l = l->next) {
|
|
GstOggStream *stream = (GstOggStream *) l->data;
|
|
|
|
if (g_list_length (stream->headers) == 0) {
|
|
GST_LOG_OBJECT (ogg, "No primary header found for stream %u",
|
|
stream->serialno);
|
|
goto failure;
|
|
}
|
|
|
|
gst_ogg_parse_append_header (&array,
|
|
GST_BUFFER (stream->headers->data));
|
|
count++;
|
|
}
|
|
|
|
for (l = ogg->oggstreams; l != NULL; l = l->next) {
|
|
GstOggStream *stream = (GstOggStream *) l->data;
|
|
int j;
|
|
|
|
for (j = 1; j < g_list_length (stream->headers); j++) {
|
|
gst_ogg_parse_append_header (&array,
|
|
GST_BUFFER (g_list_nth_data (stream->headers, j)));
|
|
count++;
|
|
}
|
|
}
|
|
|
|
caps = gst_pad_get_caps (ogg->srcpad);
|
|
caps = gst_caps_make_writable (caps);
|
|
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
gst_structure_set_value (structure, "streamheader", &array);
|
|
|
|
gst_pad_set_caps (ogg->srcpad, caps);
|
|
|
|
g_value_unset (&array);
|
|
|
|
if (ogg->caps)
|
|
gst_caps_unref (ogg->caps);
|
|
ogg->caps = caps;
|
|
|
|
GST_LOG_OBJECT (ogg, "Set \"streamheader\" caps with %d buffers "
|
|
"(one per page)", count);
|
|
|
|
/* Now, we do the same thing, but push buffers... */
|
|
for (l = ogg->oggstreams; l != NULL; l = l->next) {
|
|
GstOggStream *stream = (GstOggStream *) l->data;
|
|
GstBuffer *buf = GST_BUFFER (stream->headers->data);
|
|
|
|
gst_buffer_set_caps (buf, caps);
|
|
|
|
result = gst_pad_push (ogg->srcpad, buf);
|
|
if (result != GST_FLOW_OK)
|
|
return result;
|
|
}
|
|
for (l = ogg->oggstreams; l != NULL; l = l->next) {
|
|
GstOggStream *stream = (GstOggStream *) l->data;
|
|
int j;
|
|
|
|
for (j = 1; j < g_list_length (stream->headers); j++) {
|
|
GstBuffer *buf =
|
|
GST_BUFFER (g_list_nth_data (stream->headers, j));
|
|
gst_buffer_set_caps (buf, caps);
|
|
|
|
result = gst_pad_push (ogg->srcpad, buf);
|
|
if (result != GST_FLOW_OK)
|
|
return result;
|
|
}
|
|
}
|
|
|
|
ogg->in_headers = 0;
|
|
|
|
/* And finally the pending data pages */
|
|
for (l = ogg->oggstreams; l != NULL; l = l->next) {
|
|
GstOggStream *stream = (GstOggStream *) l->data;
|
|
GList *k;
|
|
|
|
if (stream->unknown_pages == NULL)
|
|
continue;
|
|
|
|
if (found_pending_headers) {
|
|
GST_WARNING_OBJECT (ogg, "Incorrectly muxed headers found at "
|
|
"approximate offset %" G_GINT64_FORMAT, ogg->offset);
|
|
}
|
|
found_pending_headers = TRUE;
|
|
|
|
GST_LOG_OBJECT (ogg, "Pushing %d pending pages after headers",
|
|
g_list_length (stream->unknown_pages) + 1);
|
|
|
|
for (k = stream->unknown_pages; k != NULL; k = k->next) {
|
|
GstBuffer *buf;
|
|
|
|
buf = GST_BUFFER (k->data);
|
|
gst_buffer_set_caps (buf, caps);
|
|
result = gst_pad_push (ogg->srcpad, buf);
|
|
if (result != GST_FLOW_OK)
|
|
return result;
|
|
}
|
|
g_list_foreach (stream->unknown_pages,
|
|
(GFunc) gst_mini_object_unref, NULL);
|
|
g_list_free (stream->unknown_pages);
|
|
stream->unknown_pages = NULL;
|
|
}
|
|
|
|
gst_buffer_set_caps (pagebuffer, caps);
|
|
|
|
result = gst_pad_push (ogg->srcpad, GST_BUFFER (pagebuffer));
|
|
if (result != GST_FLOW_OK)
|
|
return result;
|
|
} else {
|
|
/* Normal data page, submit buffer */
|
|
gst_buffer_set_caps (pagebuffer, ogg->caps);
|
|
result = gst_pad_push (ogg->srcpad, GST_BUFFER (pagebuffer));
|
|
if (result != GST_FLOW_OK)
|
|
return result;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
|
|
failure:
|
|
gst_pad_push_event (GST_PAD (ogg->srcpad), gst_event_new_eos ());
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_ogg_parse_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstOggParse *ogg;
|
|
GstStateChangeReturn result = GST_STATE_CHANGE_FAILURE;
|
|
|
|
ogg = GST_OGG_PARSE (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
ogg_sync_init (&ogg->sync);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
ogg_sync_reset (&ogg->sync);
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
result = parent_class->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
ogg_sync_clear (&ogg->sync);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
gboolean
|
|
gst_ogg_parse_plugin_init (GstPlugin * plugin)
|
|
{
|
|
GST_DEBUG_CATEGORY_INIT (gst_ogg_parse_debug, "oggparse", 0, "ogg parser");
|
|
|
|
return gst_element_register (plugin, "oggparse", GST_RANK_NONE,
|
|
GST_TYPE_OGG_PARSE);
|
|
}
|