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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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942 lines
28 KiB
C
942 lines
28 KiB
C
/* GStreamer
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* Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
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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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#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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/* memcpy - if someone knows a way to get rid of it, please speak up
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* note: the ogg docs even say you ned this... */
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#include <string.h>
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GST_DEBUG_CATEGORY_STATIC (gst_ogg_demux_debug);
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#define GST_CAT_DEFAULT gst_ogg_demux_debug
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#define GST_TYPE_OGG_DEMUX (gst_ogg_demux_get_type())
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#define GST_OGG_DEMUX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OGG_DEMUX, GstOggDemux))
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#define GST_OGG_DEMUX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OGG_DEMUX, GstOggDemux))
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#define GST_IS_OGG_DEMUX(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OGG_DEMUX))
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#define GST_IS_OGG_DEMUX_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OGG_DEMUX))
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typedef struct _GstOggDemux GstOggDemux;
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typedef struct _GstOggDemuxClass GstOggDemuxClass;
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typedef enum {
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/* just because you shouldn't make a valid enum value 0 */
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GST_OGG_STATE_INAVLID,
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/* just started, we need to decide if we should do setup */
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GST_OGG_STATE_START,
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/* setup is analyzing the stream, getting lengths and so on */
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GST_OGG_STATE_SETUP,
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/* after a seek, during resyncing */
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GST_OGG_STATE_SEEK,
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/* normal playback */
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GST_OGG_STATE_PLAY
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} GstOggState;
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/* all information needed for one ogg stream */
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typedef struct {
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GstPad * pad; /* reference for this pad is held by element we belong to */
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gint serial;
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ogg_stream_state stream;
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guint64 offset; /* end offset of last buffer */
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guint64 known_offset; /* last known offset */
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gint64 packetno; /* number of next expected packet */
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guint64 length; /* length of stream or 0 */
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glong pages; /* number of pages in stream or 0 */
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guint flags;
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} GstOggPad;
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typedef enum {
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GST_OGG_PAD_NEEDS_DISCONT = (1 << 0),
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GST_OGG_PAD_NEEDS_FLUSH = (1 << 1)
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}
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GstOggPadFlags;
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/* all information needed for one ogg chain (relevant for chained bitstreams) */
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typedef struct {
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GSList * pads; /* list of GstOggPad */
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} GstOggChain;
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#define CURRENT_CHAIN(ogg) (&g_array_index ((ogg)->chains, GstOggChain, (ogg)->current_chain))
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#define FOR_PAD_IN_CURRENT_CHAIN(ogg, _pad, ...) G_STMT_START{ \
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GSList *_walk; \
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for (_walk = CURRENT_CHAIN (ogg)->pads; _walk; _walk = g_slist_next (_walk)) { \
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GstOggPad *_pad = (GstOggPad *) _walk->data; \
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__VA_ARGS__ \
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} \
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}G_STMT_END
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typedef enum {
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GST_OGG_FLAG_BOS = GST_ELEMENT_FLAG_LAST,
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GST_OGG_FLAG_EOS,
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GST_OGG_FLAG_WAIT_FOR_DISCONT
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} GstOggFlag;
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struct _GstOggDemux {
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GstElement element;
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/* pad */
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GstPad * sinkpad;
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/* state */
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GstOggState state;
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GArray * chains;
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gint current_chain;
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guint flags;
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/* ogg stuff */
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ogg_sync_state sync;
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/* seeking */
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GstOggPad * seek_pad;
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guint64 seek_to;
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};
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struct _GstOggDemuxClass {
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GstElementClass parent_class;
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};
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/* elementfactory information */
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static GstElementDetails gst_ogg_demux_details = GST_ELEMENT_DETAILS (
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"ogg demuxer",
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"Codec/Demuxer",
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"demux ogg streams (info about ogg: http://xiph.org)",
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"Benjamin Otte <in7y118@public.uni-hamburg.de>"
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);
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/* signals and args */
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enum {
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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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ARG_0,
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/* FILL ME */
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};
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static GstStaticPadTemplate ogg_demux_src_template_factory =
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GST_STATIC_PAD_TEMPLATE (
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"src",
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GST_PAD_SRC,
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GST_PAD_SOMETIMES,
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GST_STATIC_CAPS_ANY
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);
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static GstStaticPadTemplate ogg_demux_sink_template_factory =
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GST_STATIC_PAD_TEMPLATE (
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"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_demux_finalize (GObject * object);
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static gboolean gst_ogg_demux_src_event (GstPad * pad,
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GstEvent * event);
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static const GstEventMask* gst_ogg_demux_get_event_masks (GstPad * pad);
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static const GstQueryType* gst_ogg_demux_get_query_types (GstPad * pad);
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static gboolean gst_ogg_demux_src_query (GstPad * pad,
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GstQueryType type,
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GstFormat * format,
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gint64 * value);
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static void gst_ogg_demux_chain (GstPad * pad,
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GstData * buffer);
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static GstElementStateReturn gst_ogg_demux_change_state (GstElement * element);
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static GstOggPad * gst_ogg_pad_new (GstOggDemux * ogg,
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int serial_no);
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static void gst_ogg_pad_remove (GstOggDemux * ogg,
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GstOggPad * ogg_pad);
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static void gst_ogg_pad_reset (GstOggDemux * ogg,
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GstOggPad * pad);
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static void gst_ogg_demux_push (GstOggDemux * ogg,
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ogg_page * page);
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static void gst_ogg_pad_push (GstOggDemux * ogg,
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GstOggPad * ogg_pad);
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static GstCaps * gst_ogg_type_find (ogg_packet * packet);
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static void gst_ogg_print (GstOggDemux * demux);
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#define GST_OGG_SET_STATE(ogg, new_state) G_STMT_START{ \
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GST_DEBUG_OBJECT (ogg, "setting state to %s", G_STRINGIFY (new_state)); \
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ogg->state = new_state; \
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}G_STMT_END
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GST_BOILERPLATE (GstOggDemux, gst_ogg_demux, GstElement, GST_TYPE_ELEMENT)
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static void
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gst_ogg_demux_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_demux_details);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&ogg_demux_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_demux_src_template_factory));
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}
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static void
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gst_ogg_demux_class_init (GstOggDemuxClass *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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gstelement_class->change_state = gst_ogg_demux_change_state;
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gobject_class->finalize = gst_ogg_demux_finalize;
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}
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static void
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gst_ogg_demux_init (GstOggDemux *ogg)
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{
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/* create the sink pad */
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ogg->sinkpad = gst_pad_new_from_template(
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gst_static_pad_template_get (&ogg_demux_sink_template_factory), "sink");
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gst_element_add_pad (GST_ELEMENT (ogg), ogg->sinkpad);
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gst_pad_set_chain_function (ogg->sinkpad, GST_DEBUG_FUNCPTR (gst_ogg_demux_chain));
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/* initalize variables */
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GST_OGG_SET_STATE (ogg, GST_OGG_STATE_START);
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ogg->chains = g_array_new (TRUE, TRUE, sizeof (GstOggChain));
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ogg->current_chain = -1;
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GST_FLAG_SET (ogg, GST_ELEMENT_EVENT_AWARE);
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}
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static void
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gst_ogg_demux_finalize (GObject *object)
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{
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GstOggDemux *ogg;
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ogg = GST_OGG_DEMUX (object);
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/* chains are removed when going to READY */
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g_assert (ogg->current_chain == -1);
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g_assert (ogg->chains->len == 0);
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g_array_free (ogg->chains, TRUE);
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}
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static const GstEventMask*
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gst_ogg_demux_get_event_masks (GstPad *pad)
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{
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static const GstEventMask gst_ogg_demux_src_event_masks[] = {
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{ GST_EVENT_SEEK, GST_SEEK_METHOD_SET |
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GST_SEEK_FLAG_FLUSH },
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{ 0, }
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};
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return gst_ogg_demux_src_event_masks;
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}
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static const GstQueryType*
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gst_ogg_demux_get_query_types (GstPad *pad)
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{
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static const GstQueryType gst_ogg_demux_src_query_types[] = {
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GST_QUERY_TOTAL,
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GST_QUERY_POSITION,
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0
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};
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return gst_ogg_demux_src_query_types;
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}
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static GstOggPad *
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gst_ogg_get_pad_by_pad (GstOggDemux *ogg, GstPad *pad)
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{
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GSList *walk;
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GstOggPad *cur;
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if (ogg->current_chain == -1) {
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GST_DEBUG_OBJECT (ogg, "no active chain, returning NULL");
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return NULL;
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}
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for (walk = CURRENT_CHAIN (ogg)->pads; walk; walk = g_slist_next (walk)) {
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cur = (GstOggPad *) walk->data;
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if (cur->pad == pad)
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return cur;
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}
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return NULL;
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}
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static gboolean
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gst_ogg_demux_src_query (GstPad *pad, GstQueryType type,
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GstFormat *format, gint64 *value)
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{
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gboolean res = FALSE;
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GstOggDemux *ogg = GST_OGG_DEMUX (gst_pad_get_parent (pad));
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GstOggPad *cur = gst_ogg_get_pad_by_pad (ogg, pad);
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if (!cur)
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return FALSE;
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switch (type) {
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case GST_QUERY_TOTAL: {
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if (*format == GST_FORMAT_DEFAULT) {
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*value = cur->length;
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res = TRUE;
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}
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break;
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}
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case GST_QUERY_POSITION:
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if (*format == GST_FORMAT_DEFAULT && cur->length != 0) {
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*value = cur->known_offset;
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res = TRUE;
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}
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break;
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default:
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break;
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}
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return res;
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}
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/* The current seeking implementation is the most simple I could come up with:
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* - when seeking forwards, just discard data until desired position is reached
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* - when seeking backwards, seek to beginning and seek forward from there
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* Anyone is free to improve this algorithm as it is quite stupid and probably
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* really slow.
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*/
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static gboolean
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gst_ogg_demux_src_event (GstPad *pad, GstEvent *event)
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{
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GstOggDemux *ogg;
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GstOggPad *cur;
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ogg = GST_OGG_DEMUX (gst_pad_get_parent (pad));
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cur = gst_ogg_get_pad_by_pad (ogg, pad);
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/* FIXME: optimize this so events from inactive chains work?
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* in theory there shouldn't be an exisiting pad for inactive chains */
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if (cur == NULL) goto error;
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_SEEK:
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{
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gint64 offset;
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if (GST_EVENT_SEEK_FORMAT (event) != GST_FORMAT_DEFAULT)
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goto error;
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offset = GST_EVENT_SEEK_OFFSET (event);
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switch (GST_EVENT_SEEK_METHOD (event)) {
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case GST_SEEK_METHOD_END:
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if (cur->length == 0 || offset > 0)
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goto error;
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offset = cur->length + offset;
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break;
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case GST_SEEK_METHOD_CUR:
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offset += cur->known_offset;
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break;
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case GST_SEEK_METHOD_SET:
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break;
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default:
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g_warning ("invalid seek method in seek event");
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goto error;
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}
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if (offset < cur->known_offset) {
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GstEvent *restart = gst_event_new_seek (GST_FORMAT_BYTES | GST_SEEK_METHOD_SET | GST_EVENT_SEEK_FLAGS (event), 0);
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if (!gst_pad_send_event (GST_PAD_PEER (ogg->sinkpad), restart))
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goto error;
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} else {
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FOR_PAD_IN_CURRENT_CHAIN (ogg, pad,
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if (GST_PAD_IS_USABLE (pad->pad))
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gst_pad_push (pad->pad, GST_DATA (gst_event_new (GST_EVENT_FLUSH)));
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);
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}
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GST_OGG_SET_STATE (ogg, GST_OGG_STATE_SEEK);
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FOR_PAD_IN_CURRENT_CHAIN (ogg, pad,
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pad->flags |= GST_OGG_PAD_NEEDS_DISCONT;
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);
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GST_DEBUG_OBJECT (ogg, "initiating seeking to offset %"G_GUINT64_FORMAT, offset);
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ogg->seek_pad = cur;
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ogg->seek_to = offset;
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gst_event_unref (event);
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return TRUE;
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}
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default:
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return gst_pad_event_default (pad, event);
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}
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g_assert_not_reached ();
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error:
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gst_event_unref (event);
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return FALSE;
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}
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static void
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gst_ogg_start_playing (GstOggDemux *ogg)
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{
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GST_DEBUG_OBJECT (ogg, "got EOS in setup, changing to playback now");
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if (!gst_pad_send_event (GST_PAD_PEER (ogg->sinkpad),
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gst_event_new_seek (GST_FORMAT_BYTES | GST_SEEK_METHOD_SET, 0))) {
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GST_ELEMENT_ERROR (ogg, CORE, SEEK, (NULL),
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("cannot seek to start after EOS"));
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}
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ogg->current_chain = 0;
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GST_FLAG_UNSET (ogg, GST_OGG_FLAG_EOS);
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GST_FLAG_SET (ogg, GST_OGG_FLAG_WAIT_FOR_DISCONT);
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GST_OGG_SET_STATE (ogg, GST_OGG_STATE_PLAY);
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gst_ogg_print (ogg);
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}
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static void
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gst_ogg_demux_handle_event (GstPad *pad, GstEvent *event)
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{
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GstOggDemux *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_DISCONTINUOUS:
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GST_DEBUG_OBJECT (ogg, "got a discont event");
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ogg_sync_reset (&ogg->sync);
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gst_event_unref (event);
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GST_FLAG_UNSET (ogg, GST_OGG_FLAG_WAIT_FOR_DISCONT);
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FOR_PAD_IN_CURRENT_CHAIN (ogg, pad,
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pad->flags |= GST_OGG_PAD_NEEDS_DISCONT;
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);
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break;
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case GST_EVENT_EOS:
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if (ogg->state == GST_OGG_STATE_SETUP) {
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gst_ogg_start_playing (ogg);
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} else {
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guint i;
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GSList *walk;
|
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GST_DEBUG_OBJECT (ogg, "got EOS");
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ogg->current_chain = -1;
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for (i = 0; i < ogg->chains->len; i++) {
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GstOggChain *chain = &g_array_index (ogg->chains, GstOggChain, i);
|
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for (walk = chain->pads; walk; walk = g_slist_next (walk)) {
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GstOggPad *pad = (GstOggPad *) walk->data;
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if (pad->pad && GST_PAD_IS_USABLE (pad->pad)) {
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gst_data_ref (GST_DATA (event));
|
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gst_pad_push (pad->pad, GST_DATA (event));
|
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}
|
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}
|
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}
|
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gst_element_set_eos (GST_ELEMENT (ogg));
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}
|
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gst_event_unref (event);
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break;
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default:
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gst_pad_event_default (pad, event);
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break;
|
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}
|
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return;
|
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}
|
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|
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/* get the pad with the given serial in the current stream or NULL if none */
|
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static GstOggPad *
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gst_ogg_pad_get_in_current_chain (GstOggDemux *ogg, int serial)
|
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{
|
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GSList *walk;
|
|
|
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if (ogg->current_chain == -1) return NULL;
|
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g_return_val_if_fail (ogg->current_chain < ogg->chains->len, NULL);
|
|
|
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for (walk = CURRENT_CHAIN (ogg)->pads; walk; walk = g_slist_next (walk)) {
|
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GstOggPad *pad = (GstOggPad *) walk->data;
|
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if (pad->serial == serial)
|
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return pad;
|
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}
|
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return NULL;
|
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}
|
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|
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static void
|
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gst_ogg_add_chain (GstOggDemux *ogg)
|
|
{
|
|
GST_LOG_OBJECT (ogg, "adding chain %u", ogg->chains->len);
|
|
ogg->current_chain = ogg->chains->len;
|
|
g_array_set_size (ogg->chains, ogg->chains->len + 1);
|
|
}
|
|
|
|
static void
|
|
gst_ogg_demux_chain (GstPad *pad, GstData *buffer)
|
|
{
|
|
GstOggDemux *ogg;
|
|
guint8 *data;
|
|
int pageout_ret = 1;
|
|
guint64 offset_end;
|
|
|
|
/* handle events */
|
|
if (GST_IS_EVENT (buffer)) {
|
|
gst_ogg_demux_handle_event (pad, GST_EVENT (buffer));
|
|
return;
|
|
}
|
|
|
|
ogg = GST_OGG_DEMUX (gst_pad_get_parent (pad));
|
|
|
|
if (GST_FLAG_IS_SET (ogg, GST_OGG_FLAG_WAIT_FOR_DISCONT)) {
|
|
GST_LOG_OBJECT (ogg, "waiting for discont event, discarding buffer");
|
|
gst_data_unref (buffer);
|
|
return;
|
|
}
|
|
|
|
GST_LOG_OBJECT (ogg, "queueing buffer %p with offset %llu", buffer, GST_BUFFER_OFFSET (buffer));
|
|
data = (guint8 *) ogg_sync_buffer(&ogg->sync, GST_BUFFER_SIZE (buffer));
|
|
memcpy (data, GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer));
|
|
if (ogg_sync_wrote (&ogg->sync, GST_BUFFER_SIZE (buffer)) != 0) {
|
|
gst_data_unref (buffer);
|
|
GST_ELEMENT_ERROR (ogg, LIBRARY, TOO_LAZY, (NULL), ("ogg_sync_wrote failed"));
|
|
return;
|
|
}
|
|
offset_end = GST_BUFFER_OFFSET_IS_VALID (buffer) ?
|
|
GST_BUFFER_OFFSET (buffer) + GST_BUFFER_SIZE (buffer) :
|
|
(guint64) -1;
|
|
gst_data_unref (buffer);
|
|
while (pageout_ret != 0) {
|
|
ogg_page page;
|
|
|
|
pageout_ret = ogg_sync_pageout (&ogg->sync, &page);
|
|
switch (pageout_ret) {
|
|
case -1:
|
|
/* FIXME: need some kind of discont here, we don't know any values to send though,
|
|
* we only have the END_OFFSET */
|
|
break;
|
|
case 0:
|
|
if (ogg->state == GST_OGG_STATE_SETUP) {
|
|
guint64 length;
|
|
GstFormat format = GST_FORMAT_BYTES;
|
|
if (!gst_pad_query (GST_PAD_PEER (ogg->sinkpad), GST_QUERY_TOTAL, &format, &length))
|
|
length = 0;
|
|
if (length <= offset_end) {
|
|
gst_ogg_start_playing (ogg);
|
|
goto out;
|
|
}
|
|
}
|
|
break;
|
|
case 1:
|
|
GST_LOG_OBJECT (ogg, "processing ogg page (serial %d, packet %ld, granule pos %llu",
|
|
ogg_page_serialno (&page), ogg_page_pageno (&page), ogg_page_granulepos (&page));
|
|
switch (ogg->state) {
|
|
case GST_OGG_STATE_SETUP:
|
|
if (ogg_page_eos (&page)) {
|
|
GstOggPad *cur = gst_ogg_pad_get_in_current_chain (ogg, ogg_page_serialno (&page));
|
|
GST_FLAG_SET (ogg, GST_OGG_FLAG_EOS);
|
|
if (!cur) {
|
|
GST_ERROR_OBJECT (ogg, "unknown serial %d", ogg_page_serialno (&page));
|
|
} else {
|
|
cur->pages = ogg_page_pageno (&page);
|
|
cur->length = ogg_page_granulepos (&page);
|
|
}
|
|
} else {
|
|
if (GST_FLAG_IS_SET (ogg, GST_OGG_FLAG_EOS) && ogg_page_bos (&page)) {
|
|
gst_ogg_add_chain (ogg);
|
|
}
|
|
GST_FLAG_UNSET (ogg, GST_OGG_FLAG_EOS);
|
|
}
|
|
if (ogg_page_bos (&page)) {
|
|
if (gst_ogg_pad_get_in_current_chain (ogg, ogg_page_serialno (&page))) {
|
|
GST_ERROR_OBJECT (ogg, "multiple BOS page for serial %d (page %ld)",
|
|
ogg_page_serialno (&page), ogg_page_pageno (&page));
|
|
} else {
|
|
GstOggPad *pad = gst_ogg_pad_new (ogg, ogg_page_serialno (&page));
|
|
CURRENT_CHAIN (ogg)->pads = g_slist_prepend (CURRENT_CHAIN (ogg)->pads, pad);
|
|
}
|
|
GST_FLAG_SET (ogg, GST_OGG_FLAG_BOS);
|
|
} else {
|
|
GST_FLAG_UNSET (ogg, GST_OGG_FLAG_BOS);
|
|
}
|
|
break;
|
|
case GST_OGG_STATE_START:
|
|
if (gst_pad_send_event (GST_PAD_PEER (ogg->sinkpad),
|
|
gst_event_new_seek (GST_FORMAT_BYTES | GST_SEEK_METHOD_END, 0))) {
|
|
GST_OGG_SET_STATE (ogg, GST_OGG_STATE_SETUP);
|
|
GST_DEBUG_OBJECT (ogg, "stream can seek, try setup now");
|
|
if (!gst_pad_send_event (GST_PAD_PEER (ogg->sinkpad),
|
|
gst_event_new_seek (GST_FORMAT_BYTES | GST_SEEK_METHOD_SET, 0))) {
|
|
GST_ELEMENT_ERROR (ogg, CORE, SEEK, (NULL),
|
|
("stream can seek to end, but not to start. Can't handle that."));
|
|
}
|
|
gst_ogg_add_chain (ogg);
|
|
GST_FLAG_SET (ogg, GST_OGG_FLAG_WAIT_FOR_DISCONT);
|
|
goto out;
|
|
}
|
|
gst_ogg_add_chain (ogg);
|
|
GST_OGG_SET_STATE (ogg, GST_OGG_STATE_PLAY);
|
|
/* fall through */
|
|
case GST_OGG_STATE_SEEK:
|
|
case GST_OGG_STATE_PLAY:
|
|
gst_ogg_demux_push (ogg, &page);
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
GST_WARNING_OBJECT (ogg, "unknown return value %d from ogg_sync_pageout", pageout_ret);
|
|
pageout_ret = 0;
|
|
break;
|
|
}
|
|
}
|
|
out:
|
|
return;
|
|
}
|
|
static GstOggPad *
|
|
gst_ogg_pad_new (GstOggDemux *ogg, int serial)
|
|
{
|
|
GstOggPad *ret = g_new0 (GstOggPad, 1);
|
|
GstTagList *list = gst_tag_list_new ();
|
|
|
|
ret->serial = serial;
|
|
if (ogg_stream_init (&ret->stream, serial) != 0) {
|
|
GST_ERROR_OBJECT (ogg, "Could not initialize ogg_stream struct for serial %d.", serial);
|
|
g_free (ret);
|
|
return NULL;
|
|
}
|
|
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_SERIAL, serial, NULL);
|
|
gst_element_found_tags (GST_ELEMENT (ogg), list);
|
|
GST_LOG_OBJECT (ogg, "created new ogg src %p for stream with serial %d", ret, serial);
|
|
|
|
return ret;
|
|
}
|
|
static void
|
|
gst_ogg_pad_remove (GstOggDemux *ogg, GstOggPad *pad)
|
|
{
|
|
if (pad->pad) {
|
|
/* FIXME:
|
|
* we do it in the EOS signal already - EOS handling needs to be better thought out.
|
|
* Correct way would be pushing EOS on eos page, but scheduler doesn't like that
|
|
if (GST_PAD_IS_USEABLE (pad->pad))
|
|
gst_pad_push (pad->pad, GST_DATA (gst_event_new (GST_EVENT_EOS)));
|
|
*/
|
|
gst_element_remove_pad (GST_ELEMENT (ogg), pad->pad);
|
|
}
|
|
if (ogg_stream_clear (&pad->stream) != 0)
|
|
GST_ERROR_OBJECT (ogg, "ogg_stream_clear (serial %d) did not return 0, ignoring this error", pad->serial);
|
|
GST_LOG_OBJECT (ogg, "free ogg src %p for stream with serial %d", pad, pad->serial);
|
|
g_free (pad);
|
|
}
|
|
static void
|
|
gst_ogg_demux_push (GstOggDemux *ogg, ogg_page* page)
|
|
{
|
|
GSList *walk;
|
|
GstOggPad *cur;
|
|
|
|
/* find the stream */
|
|
for (walk = CURRENT_CHAIN (ogg)->pads; walk; walk = g_slist_next (walk)) {
|
|
cur = (GstOggPad *) walk->data;
|
|
if (cur->serial == ogg_page_serialno (page)) {
|
|
goto br;
|
|
}
|
|
}
|
|
cur = NULL;
|
|
br:
|
|
/* now we either have a stream (cur) or not */
|
|
if (ogg_page_bos (page)) {
|
|
if (cur) {
|
|
GST_DEBUG_OBJECT (ogg, "ogg page declared as BOS while stream %d already existed."
|
|
"Possibly a seek happened.", cur->serial);
|
|
} else if (cur) {
|
|
GST_DEBUG_OBJECT (ogg, "reactivating deactivated stream %d.", cur->serial);
|
|
} else {
|
|
/* FIXME: monitor if we are still in creation stage? */
|
|
cur = gst_ogg_pad_new (ogg, ogg_page_serialno (page));
|
|
if (!cur) {
|
|
GST_ELEMENT_ERROR (ogg, LIBRARY, TOO_LAZY, (NULL), ("Creating ogg_stream struct failed."));
|
|
return;
|
|
}
|
|
if (ogg->current_chain == -1) {
|
|
/* add new one at the end */
|
|
gst_ogg_add_chain (ogg);
|
|
}
|
|
CURRENT_CHAIN (ogg)->pads = g_slist_prepend (CURRENT_CHAIN (ogg)->pads, cur);
|
|
}
|
|
}
|
|
if (cur == NULL) {
|
|
GST_ELEMENT_ERROR (ogg, STREAM, DECODE, (NULL), ("invalid ogg stream serial no"));
|
|
return;
|
|
}
|
|
if (ogg_stream_pagein (&cur->stream, page) != 0) {
|
|
GST_WARNING_OBJECT (ogg, "ogg stream choked on page (serial %d), resetting stream", cur->serial);
|
|
gst_ogg_pad_reset (ogg, cur);
|
|
return;
|
|
}
|
|
switch (ogg->state) {
|
|
case GST_OGG_STATE_SEEK:
|
|
GST_LOG_OBJECT (ogg, "in seek - offset now: %"G_GUINT64_FORMAT" (pad %d) - desired offset %"
|
|
G_GUINT64_FORMAT" (pad %d)", cur->known_offset, cur->serial,
|
|
ogg->seek_to, ogg->seek_pad->serial);
|
|
if (cur == ogg->seek_pad) {
|
|
if (ogg_page_granulepos (page) > ogg->seek_to) {
|
|
GST_OGG_SET_STATE (ogg, GST_OGG_STATE_PLAY);
|
|
GST_DEBUG_OBJECT (ogg, "ended seek at offset %"G_GUINT64_FORMAT" (requested %"G_GUINT64_FORMAT, cur->known_offset, ogg->seek_to);
|
|
ogg->seek_pad = NULL;
|
|
ogg->seek_to = 0;
|
|
}
|
|
}
|
|
/* fallthrough */
|
|
case GST_OGG_STATE_PLAY:
|
|
cur->known_offset = ogg_page_granulepos (page);
|
|
gst_ogg_pad_push (ogg, cur);
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
break;
|
|
}
|
|
if (ogg_page_eos (page)) {
|
|
GST_DEBUG_OBJECT (ogg, "got EOS for stream with serial %d, sending EOS now",
|
|
cur->serial);
|
|
#if 0
|
|
/* Removing pads while PLAYING doesn't work with current schedulers */
|
|
/* remove from list, as this will never be called again */
|
|
gst_ogg_pad_remove (ogg, cur);
|
|
/* this is also not possible because sending EOS this way confuses the scheduler */
|
|
gst_pad_push (cur->pad, GST_DATA (gst_event_new (GST_EVENT_EOS)));
|
|
#else
|
|
#endif
|
|
}
|
|
}
|
|
static void
|
|
gst_ogg_pad_push (GstOggDemux *ogg, GstOggPad *pad)
|
|
{
|
|
ogg_packet packet;
|
|
int ret;
|
|
GstBuffer *buf;
|
|
|
|
while (TRUE) {
|
|
ret = ogg_stream_packetout (&pad->stream, &packet);
|
|
switch (ret) {
|
|
case 0:
|
|
return;
|
|
case -1:
|
|
gst_ogg_pad_reset (ogg, pad);
|
|
break;
|
|
case 1: {
|
|
/* only push data when playing, not during seek or similar */
|
|
if (ogg->state != GST_OGG_STATE_PLAY)
|
|
continue;
|
|
if (!pad->pad) {
|
|
GstCaps *caps = gst_ogg_type_find (&packet);
|
|
gchar *name = g_strdup_printf ("serial_%d", pad->serial);
|
|
|
|
if (caps == NULL) {
|
|
GST_WARNING_OBJECT (ogg, "couldn't find caps for stream with serial %d", pad->serial);
|
|
caps = gst_caps_new_simple ("application/octet-stream", NULL);
|
|
}
|
|
pad->pad = gst_pad_new_from_template (
|
|
gst_static_pad_template_get (&ogg_demux_src_template_factory),
|
|
name);
|
|
g_free (name);
|
|
gst_pad_set_event_function (pad->pad, GST_DEBUG_FUNCPTR (gst_ogg_demux_src_event));
|
|
gst_pad_set_event_mask_function (pad->pad, GST_DEBUG_FUNCPTR (gst_ogg_demux_get_event_masks));
|
|
gst_pad_set_query_function (pad->pad, GST_DEBUG_FUNCPTR (gst_ogg_demux_src_query));
|
|
gst_pad_set_query_type_function (pad->pad, GST_DEBUG_FUNCPTR (gst_ogg_demux_get_query_types));
|
|
gst_pad_use_explicit_caps (pad->pad);
|
|
gst_pad_set_explicit_caps (pad->pad, caps);
|
|
gst_pad_set_active (pad->pad, TRUE);
|
|
gst_element_add_pad (GST_ELEMENT (ogg), pad->pad);
|
|
}
|
|
/* check for discont */
|
|
if (packet.packetno != pad->packetno++) {
|
|
pad->flags |= GST_OGG_PAD_NEEDS_DISCONT;
|
|
pad->packetno = packet.packetno + 1;
|
|
}
|
|
/* send discont if needed */
|
|
if ((pad->flags & GST_OGG_PAD_NEEDS_DISCONT) && GST_PAD_IS_USABLE (pad->pad)) {
|
|
GstEvent *event = gst_event_new_discontinuous (FALSE,
|
|
GST_FORMAT_DEFAULT, pad->known_offset); /* FIXME: this might be wrong because we can only use the last known offset */
|
|
gst_pad_push (pad->pad, GST_DATA (event));
|
|
pad->flags &= (~GST_OGG_PAD_NEEDS_DISCONT);
|
|
};
|
|
/* optimization: use a bufferpool containing the ogg packet? */
|
|
buf = gst_pad_alloc_buffer (pad->pad, GST_BUFFER_OFFSET_NONE, packet.bytes);
|
|
memcpy (buf->data, packet.packet, packet.bytes);
|
|
if (pad->offset != -1)
|
|
GST_BUFFER_OFFSET (buf) = pad->offset;
|
|
if (packet.granulepos != -1)
|
|
GST_BUFFER_OFFSET_END (buf) = packet.granulepos;
|
|
pad->offset = packet.granulepos;
|
|
if (GST_PAD_IS_USABLE (pad->pad))
|
|
gst_pad_push (pad->pad, GST_DATA (buf));
|
|
break;
|
|
}
|
|
default:
|
|
GST_ERROR_OBJECT (ogg, "invalid return value %d for ogg_stream_packetout, resetting stream", ret);
|
|
gst_ogg_pad_reset (ogg, pad);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
static void
|
|
gst_ogg_pad_reset (GstOggDemux *ogg, GstOggPad *pad)
|
|
{
|
|
ogg_stream_reset (&pad->stream);
|
|
pad->offset = GST_BUFFER_OFFSET_NONE;
|
|
/* FIXME: need a discont here */
|
|
}
|
|
|
|
static void
|
|
gst_ogg_chains_clear (GstOggDemux *ogg)
|
|
{
|
|
gint i;
|
|
GSList *walk;
|
|
|
|
for (i = ogg->chains->len - 1; i >= 0; i--) {
|
|
GstOggChain *cur = &g_array_index (ogg->chains, GstOggChain, i);
|
|
for (walk = cur->pads; walk; walk = g_slist_next (walk)) {
|
|
gst_ogg_pad_remove (ogg, (GstOggPad *) walk->data);
|
|
}
|
|
g_slist_free (cur->pads);
|
|
g_array_remove_index (ogg->chains, i);
|
|
}
|
|
ogg->current_chain = -1;
|
|
}
|
|
|
|
static GstElementStateReturn
|
|
gst_ogg_demux_change_state (GstElement *element)
|
|
{
|
|
GstOggDemux *ogg;
|
|
|
|
ogg = GST_OGG_DEMUX (element);
|
|
|
|
switch (GST_STATE_TRANSITION (element)) {
|
|
case GST_STATE_NULL_TO_READY:
|
|
ogg_sync_init (&ogg->sync);
|
|
break;
|
|
case GST_STATE_READY_TO_PAUSED:
|
|
ogg_sync_reset (&ogg->sync);
|
|
break;
|
|
case GST_STATE_PAUSED_TO_PLAYING:
|
|
break;
|
|
case GST_STATE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_PAUSED_TO_READY:
|
|
gst_ogg_chains_clear (ogg);
|
|
GST_OGG_SET_STATE (ogg, GST_OGG_STATE_START);
|
|
ogg->seek_pad = NULL;
|
|
ogg->seek_to = 0;
|
|
break;
|
|
case GST_STATE_READY_TO_NULL:
|
|
ogg_sync_clear (&ogg->sync);
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
break;
|
|
}
|
|
|
|
return parent_class->change_state (element);
|
|
}
|
|
|
|
/*** typefinding **************************************************************/
|
|
/* ogg supports its own typefinding because the ogg spec defines that the first
|
|
* packet of an ogg stream must identify the stream. Therefore ogg can use a
|
|
* simplified approach at typefinding.
|
|
*/
|
|
typedef struct {
|
|
ogg_packet * packet;
|
|
guint best_probability;
|
|
GstCaps * caps;
|
|
} OggTypeFind;
|
|
static guint8 *
|
|
ogg_find_peek (gpointer data, gint64 offset, guint size)
|
|
{
|
|
OggTypeFind *find = (OggTypeFind *) data;
|
|
|
|
if (offset + size <= find->packet->bytes) {
|
|
return ((guint8 *) find->packet->packet) + offset;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
}
|
|
static void
|
|
ogg_find_suggest (gpointer data, guint probability, const GstCaps *caps)
|
|
{
|
|
OggTypeFind *find = (OggTypeFind *) data;
|
|
|
|
if (probability > find->best_probability) {
|
|
gst_caps_replace (&find->caps, gst_caps_copy (caps));
|
|
find->best_probability = probability;
|
|
}
|
|
}
|
|
static GstCaps *
|
|
gst_ogg_type_find (ogg_packet *packet)
|
|
{
|
|
GstTypeFind gst_find;
|
|
OggTypeFind find;
|
|
GList *walk, *type_list = NULL;
|
|
|
|
walk = type_list = gst_type_find_factory_get_list ();
|
|
|
|
find.packet = packet;
|
|
find.best_probability = 0;
|
|
find.caps = NULL;
|
|
gst_find.data = &find;
|
|
gst_find.peek = ogg_find_peek;
|
|
gst_find.suggest = ogg_find_suggest;
|
|
|
|
while (walk) {
|
|
GstTypeFindFactory *factory = GST_TYPE_FIND_FACTORY (walk->data);
|
|
|
|
gst_type_find_factory_call_function (factory, &gst_find);
|
|
if (find.best_probability >= GST_TYPE_FIND_MAXIMUM)
|
|
break;
|
|
walk = g_list_next (walk);
|
|
}
|
|
|
|
if (find.best_probability > 0)
|
|
return find.caps;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin *plugin)
|
|
{
|
|
GST_DEBUG_CATEGORY_INIT (gst_ogg_demux_debug, "oggdemux", 0, "ogg demuxer");
|
|
|
|
return gst_element_register (plugin, "oggdemux", GST_RANK_PRIMARY, GST_TYPE_OGG_DEMUX);
|
|
}
|
|
GST_PLUGIN_DEFINE (
|
|
GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
"ogg",
|
|
"ogg stream manipulation (info about ogg: http://xiph.org)",
|
|
plugin_init,
|
|
VERSION,
|
|
GST_LICENSE,
|
|
GST_PACKAGE,
|
|
GST_ORIGIN
|
|
)
|
|
|
|
/* prints all info about the element */
|
|
static void
|
|
gst_ogg_print (GstOggDemux *ogg)
|
|
{
|
|
guint i;
|
|
GSList *walk;
|
|
|
|
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, g_slist_length (chain->pads));
|
|
for (walk = chain->pads; walk; walk = g_slist_next (walk)) {
|
|
GstOggPad *pad = (GstOggPad *) walk->data;
|
|
GST_INFO_OBJECT (ogg, " stream %d:", pad->serial);
|
|
GST_INFO_OBJECT (ogg, " length %"G_GUINT64_FORMAT, pad->length);
|
|
GST_INFO_OBJECT (ogg, " pages %ld", pad->pages);
|
|
}
|
|
}
|
|
}
|