2004-01-30 20:23:24 +00:00
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/* GStreamer
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* Copyright (C) 2004 Benjamin Otte <in7y118@public.uni-hamburg.de>
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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 <theora/theora.h>
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#include <string.h>
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#include <gst/tag/tag.h>
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#define GST_TYPE_THEORA_DEC \
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(gst_theora_dec_get_type())
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#define GST_THEORA_DEC(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_THEORA_DEC,GstTheoraDec))
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#define GST_THEORA_DEC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_THEORA_DEC,GstTheoraDec))
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#define GST_IS_THEORA_DEC(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_THEORA_DEC))
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#define GST_IS_THEORA_DEC_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_THEORA_DEC))
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typedef struct _GstTheoraDec GstTheoraDec;
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typedef struct _GstTheoraDecClass GstTheoraDecClass;
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2004-03-14 22:34:34 +00:00
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struct _GstTheoraDec
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{
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GstElement element;
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GstPad *sinkpad;
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GstPad *srcpad;
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theora_state state;
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theora_info info;
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theora_comment comment;
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guint packetno;
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guint64 granulepos;
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2004-06-11 17:34:32 +00:00
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gboolean need_keyframe;
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2004-01-30 20:23:24 +00:00
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};
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2004-03-14 22:34:34 +00:00
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struct _GstTheoraDecClass
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{
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2004-01-30 20:23:24 +00:00
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GstElementClass parent_class;
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};
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static GstElementDetails theora_dec_details = {
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"TheoraDec",
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2004-05-10 12:22:05 +00:00
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"Codec/Decoder/Video",
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2004-01-30 20:23:24 +00:00
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"decode raw theora streams to raw YUV video",
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"Benjamin Otte <in7y118@public.uni-hamburg.de>",
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};
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static GstStaticPadTemplate theora_dec_src_factory =
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2004-03-14 22:34:34 +00:00
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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 ("video/x-raw-yuv, "
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2004-03-15 19:32:28 +00:00
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"format = (fourcc) I420, "
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"framerate = (double) [0, MAX], "
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"width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]")
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2004-03-14 22:34:34 +00:00
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);
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2004-01-30 20:23:24 +00:00
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static GstStaticPadTemplate theora_dec_sink_factory =
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2004-03-14 22:34:34 +00:00
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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 ("video/x-theora")
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);
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2004-01-30 20:23:24 +00:00
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GST_BOILERPLATE (GstTheoraDec, gst_theora_dec, GstElement, GST_TYPE_ELEMENT);
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2004-03-14 22:34:34 +00:00
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static void theora_dec_chain (GstPad * pad, GstData * data);
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static GstElementStateReturn theora_dec_change_state (GstElement * element);
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static gboolean theora_dec_src_event (GstPad * pad, GstEvent * event);
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static gboolean theora_dec_src_query (GstPad * pad,
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GstQueryType query, GstFormat * format, gint64 * value);
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2004-01-30 20:23:24 +00:00
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static void
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gst_theora_dec_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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2004-03-14 22:34:34 +00:00
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gst_element_class_add_pad_template (element_class,
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2004-01-30 20:23:24 +00:00
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gst_static_pad_template_get (&theora_dec_src_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&theora_dec_sink_factory));
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gst_element_class_set_details (element_class, &theora_dec_details);
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}
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static void
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2004-03-14 22:34:34 +00:00
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gst_theora_dec_class_init (GstTheoraDecClass * klass)
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2004-01-30 20:23:24 +00:00
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{
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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gstelement_class->change_state = theora_dec_change_state;
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}
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static void
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2004-03-14 22:34:34 +00:00
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gst_theora_dec_init (GstTheoraDec * dec)
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2004-01-30 20:23:24 +00:00
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{
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2004-03-14 22:34:34 +00:00
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dec->sinkpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&theora_dec_sink_factory), "sink");
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2004-01-30 20:23:24 +00:00
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gst_pad_set_chain_function (dec->sinkpad, theora_dec_chain);
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gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
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2004-03-14 22:34:34 +00:00
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dec->srcpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&theora_dec_src_factory), "src");
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2004-01-30 20:23:24 +00:00
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gst_pad_use_explicit_caps (dec->srcpad);
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gst_pad_set_event_function (dec->srcpad, theora_dec_src_event);
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2004-02-03 16:15:16 +00:00
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gst_pad_set_query_function (dec->srcpad, theora_dec_src_query);
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2004-01-30 20:23:24 +00:00
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gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
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GST_FLAG_SET (dec, GST_ELEMENT_EVENT_AWARE);
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}
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2004-02-03 16:15:16 +00:00
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/* FIXME: copy from libtheora, theora should somehow make this available for seeking */
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2004-03-14 22:34:34 +00:00
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static int
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_theora_ilog (unsigned int v)
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{
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int ret = 0;
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while (v) {
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2004-02-03 16:15:16 +00:00
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ret++;
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2004-03-14 22:34:34 +00:00
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v >>= 1;
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2004-02-03 16:15:16 +00:00
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}
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2004-03-14 22:34:34 +00:00
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return (ret);
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2004-02-03 16:15:16 +00:00
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}
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static gboolean
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2004-03-14 22:34:34 +00:00
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theora_dec_from_granulepos (GstTheoraDec * dec, GstFormat format, guint64 from,
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guint64 * to)
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2004-02-03 16:15:16 +00:00
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{
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guint64 framecount;
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guint ilog = _theora_ilog (dec->info.keyframe_frequency_force);
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2004-03-14 22:34:34 +00:00
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if (dec->packetno < 1)
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return FALSE;
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2004-02-03 16:15:16 +00:00
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/* granulepos is last ilog bits for counting pframes since last iframe and
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* bits in front of that for the framenumber of the last iframe. */
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framecount = from >> ilog;
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framecount += from - (framecount << ilog);
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switch (format) {
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case GST_FORMAT_TIME:
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2004-03-14 22:34:34 +00:00
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*to = framecount =
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2004-03-15 19:32:28 +00:00
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from * GST_SECOND * dec->info.fps_denominator /
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dec->info.fps_numerator;
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2004-02-03 16:15:16 +00:00
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break;
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case GST_FORMAT_DEFAULT:
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*to = framecount;
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break;
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case GST_FORMAT_BYTES:
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*to = framecount * dec->info.height * dec->info.width * 12 / 8;
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break;
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default:
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return FALSE;
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}
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return TRUE;
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}
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/* FIXME: we can only seek to keyframes... */
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2004-01-30 20:23:24 +00:00
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static gboolean
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2004-03-14 22:34:34 +00:00
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theora_dec_to_granulepos (GstTheoraDec * dec, GstFormat format, guint64 from,
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guint64 * to)
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2004-01-30 20:23:24 +00:00
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{
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guint64 framecount;
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2004-03-14 22:34:34 +00:00
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if (dec->packetno < 1)
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return FALSE;
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2004-01-30 20:23:24 +00:00
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switch (format) {
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case GST_FORMAT_TIME:
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2004-03-14 22:34:34 +00:00
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framecount =
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2004-03-15 19:32:28 +00:00
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from * dec->info.fps_numerator / (GST_SECOND *
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dec->info.fps_denominator);
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2004-02-03 16:15:16 +00:00
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break;
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2004-01-30 20:23:24 +00:00
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case GST_FORMAT_DEFAULT:
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framecount = from;
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2004-02-03 16:15:16 +00:00
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break;
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2004-01-30 20:23:24 +00:00
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case GST_FORMAT_BYTES:
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2004-02-03 16:15:16 +00:00
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framecount = from * 8 / (dec->info.height * dec->info.width * 12);
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break;
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2004-01-30 20:23:24 +00:00
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default:
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return FALSE;
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}
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2004-02-03 16:15:16 +00:00
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*to = framecount << _theora_ilog (dec->info.keyframe_frequency_force - 1);
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return TRUE;
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2004-01-30 20:23:24 +00:00
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}
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2004-02-03 16:15:16 +00:00
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static gboolean
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2004-03-14 22:34:34 +00:00
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theora_dec_src_query (GstPad * pad, GstQueryType query, GstFormat * format,
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gint64 * value)
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2004-02-03 16:15:16 +00:00
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{
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gint64 granulepos;
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GstTheoraDec *dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
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GstFormat my_format = GST_FORMAT_DEFAULT;
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2004-03-14 22:34:34 +00:00
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if (!gst_pad_query (GST_PAD_PEER (dec->sinkpad), query, &my_format,
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2004-03-15 19:32:28 +00:00
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&granulepos))
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2004-02-03 16:15:16 +00:00
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return FALSE;
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if (!theora_dec_from_granulepos (dec, *format, granulepos, value))
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return FALSE;
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2004-03-14 22:34:34 +00:00
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GST_LOG_OBJECT (dec,
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"query %u: peer returned granulepos: %llu - we return %llu (format %u)\n",
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2004-02-03 16:15:16 +00:00
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query, granulepos, *value, *format);
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return TRUE;
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}
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2004-01-30 20:23:24 +00:00
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static gboolean
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2004-03-14 22:34:34 +00:00
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theora_dec_src_event (GstPad * pad, GstEvent * event)
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2004-01-30 20:23:24 +00:00
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{
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gboolean res = TRUE;
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GstTheoraDec *dec;
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dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
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switch (GST_EVENT_TYPE (event)) {
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2004-03-14 22:34:34 +00:00
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case GST_EVENT_SEEK:{
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2004-01-30 20:23:24 +00:00
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guint64 value;
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2004-03-14 22:34:34 +00:00
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res = theora_dec_to_granulepos (dec, GST_EVENT_SEEK_FORMAT (event),
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2004-03-15 19:32:28 +00:00
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GST_EVENT_SEEK_OFFSET (event), &value);
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2004-01-30 20:23:24 +00:00
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if (res) {
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2004-03-15 19:32:28 +00:00
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GstEvent *real_seek = gst_event_new_seek (
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(GST_EVENT_SEEK_TYPE (event) & ~GST_SEEK_FORMAT_MASK) |
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GST_FORMAT_DEFAULT,
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value);
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2004-03-14 22:34:34 +00:00
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2004-03-15 19:32:28 +00:00
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res = gst_pad_send_event (GST_PAD_PEER (dec->sinkpad), real_seek);
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2004-01-30 20:23:24 +00:00
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}
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gst_event_unref (event);
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break;
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}
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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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return res;
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}
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static void
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2004-03-14 22:34:34 +00:00
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theora_dec_event (GstTheoraDec * dec, GstEvent * event)
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2004-01-30 20:23:24 +00:00
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{
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2004-02-03 16:15:16 +00:00
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guint64 value, time, bytes;
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2004-03-14 22:34:34 +00:00
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2004-01-30 20:23:24 +00:00
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GST_LOG_OBJECT (dec, "handling event");
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_DISCONTINUOUS:
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if (gst_event_discont_get_value (event, GST_FORMAT_DEFAULT, &value)) {
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2004-03-15 19:32:28 +00:00
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dec->granulepos = value;
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GST_DEBUG_OBJECT (dec,
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"setting granuleposition to %" G_GUINT64_FORMAT " after discont\n",
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value);
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2004-01-30 20:23:24 +00:00
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} else {
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2004-03-15 19:32:28 +00:00
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GST_WARNING_OBJECT (dec,
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"discont event didn't include offset, we might set it wrong now");
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2004-01-30 20:23:24 +00:00
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}
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2004-02-03 16:15:16 +00:00
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if (dec->packetno < 3) {
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2004-03-15 19:32:28 +00:00
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if (dec->granulepos != 0)
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GST_ELEMENT_ERROR (dec, STREAM, DECODE, (NULL),
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("can't handle discont before parsing first 3 packets"));
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dec->packetno = 0;
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gst_pad_push (dec->srcpad, GST_DATA (gst_event_new_discontinuous (FALSE,
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GST_FORMAT_TIME, (guint64) 0, GST_FORMAT_DEFAULT,
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(guint64) 0, GST_FORMAT_BYTES, (guint64) 0, 0)));
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2004-02-03 16:15:16 +00:00
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} else {
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2004-03-15 19:32:28 +00:00
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dec->packetno = 3;
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/* if one of them works, all of them work */
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if (theora_dec_from_granulepos (dec, GST_FORMAT_TIME, dec->granulepos,
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|
&time)
|
|
|
|
&& theora_dec_from_granulepos (dec, GST_FORMAT_DEFAULT,
|
|
|
|
dec->granulepos, &value)
|
|
|
|
&& theora_dec_from_granulepos (dec, GST_FORMAT_BYTES,
|
|
|
|
dec->granulepos, &bytes)) {
|
|
|
|
gst_pad_push (dec->srcpad,
|
|
|
|
GST_DATA (gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME,
|
|
|
|
time, GST_FORMAT_DEFAULT, value, GST_FORMAT_BYTES, bytes,
|
|
|
|
0)));
|
|
|
|
} else {
|
|
|
|
GST_ERROR_OBJECT (dec,
|
|
|
|
"failed to parse data for DISCONT event, not sending any");
|
|
|
|
}
|
2004-02-03 16:15:16 +00:00
|
|
|
}
|
2004-01-30 20:23:24 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
gst_pad_event_default (dec->sinkpad, event);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2004-03-14 22:34:34 +00:00
|
|
|
theora_dec_chain (GstPad * pad, GstData * data)
|
2004-01-30 20:23:24 +00:00
|
|
|
{
|
|
|
|
GstBuffer *buf;
|
|
|
|
GstTheoraDec *dec;
|
|
|
|
ogg_packet packet;
|
|
|
|
|
|
|
|
dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
|
|
|
|
if (GST_IS_EVENT (data)) {
|
|
|
|
theora_dec_event (dec, GST_EVENT (data));
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
buf = GST_BUFFER (data);
|
|
|
|
/* make ogg_packet out of the buffer */
|
|
|
|
packet.packet = GST_BUFFER_DATA (buf);
|
|
|
|
packet.bytes = GST_BUFFER_SIZE (buf);
|
|
|
|
packet.granulepos = GST_BUFFER_OFFSET_END (buf);
|
2004-03-14 22:34:34 +00:00
|
|
|
packet.packetno = dec->packetno++;
|
2004-02-03 16:15:16 +00:00
|
|
|
packet.b_o_s = (packet.packetno == 0) ? 1 : 0;
|
|
|
|
packet.e_o_s = 0;
|
2004-06-11 17:34:32 +00:00
|
|
|
|
2004-01-30 20:23:24 +00:00
|
|
|
/* switch depending on packet type */
|
|
|
|
if (packet.packet[0] & 0x80) {
|
|
|
|
/* header packet */
|
|
|
|
if (theora_decode_header (&dec->info, &dec->comment, &packet)) {
|
2004-03-14 22:34:34 +00:00
|
|
|
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
|
2004-03-15 19:32:28 +00:00
|
|
|
(NULL), ("couldn't read header packet"));
|
2004-01-30 20:23:24 +00:00
|
|
|
gst_data_unref (data);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (packet.packetno == 1) {
|
2004-01-31 11:24:18 +00:00
|
|
|
gchar *encoder = NULL;
|
2004-03-14 22:34:34 +00:00
|
|
|
GstTagList *list =
|
2004-03-15 19:32:28 +00:00
|
|
|
gst_tag_list_from_vorbiscomment_buffer (buf, "\201theora", 7,
|
|
|
|
&encoder);
|
2004-03-14 22:34:34 +00:00
|
|
|
|
2004-01-31 11:24:18 +00:00
|
|
|
if (!list) {
|
2004-03-15 19:32:28 +00:00
|
|
|
GST_ERROR_OBJECT (dec, "failed to parse tags");
|
|
|
|
list = gst_tag_list_new ();
|
2004-01-31 11:24:18 +00:00
|
|
|
}
|
|
|
|
if (encoder) {
|
2004-03-15 19:32:28 +00:00
|
|
|
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
|
|
|
|
GST_TAG_ENCODER, encoder, NULL);
|
|
|
|
g_free (encoder);
|
2004-01-31 11:24:18 +00:00
|
|
|
}
|
2004-01-30 20:23:24 +00:00
|
|
|
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
|
2004-03-15 19:32:28 +00:00
|
|
|
GST_TAG_ENCODER_VERSION, dec->info.version_major, NULL);
|
2004-01-30 20:23:24 +00:00
|
|
|
gst_element_found_tags_for_pad (GST_ELEMENT (dec), dec->srcpad, 0, list);
|
|
|
|
} else if (packet.packetno == 2) {
|
|
|
|
GstCaps *caps;
|
2004-03-14 22:34:34 +00:00
|
|
|
|
2004-01-30 20:23:24 +00:00
|
|
|
/* done */
|
|
|
|
theora_decode_init (&dec->state, &dec->info);
|
|
|
|
caps = gst_caps_new_simple ("video/x-raw-yuv",
|
2004-03-15 19:32:28 +00:00
|
|
|
"format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('I', '4', '2', '0'),
|
|
|
|
"framerate", G_TYPE_DOUBLE,
|
|
|
|
((gdouble) dec->info.fps_numerator) / dec->info.fps_denominator,
|
|
|
|
"width", G_TYPE_INT, dec->info.width, "height", G_TYPE_INT,
|
|
|
|
dec->info.height, NULL);
|
2004-01-30 20:23:24 +00:00
|
|
|
gst_pad_set_explicit_caps (dec->srcpad, caps);
|
|
|
|
gst_caps_free (caps);
|
|
|
|
}
|
|
|
|
} else {
|
2004-06-11 17:34:32 +00:00
|
|
|
/* normal data packet */
|
2004-01-30 20:23:24 +00:00
|
|
|
yuv_buffer yuv;
|
|
|
|
GstBuffer *out;
|
|
|
|
guint8 *y, *v, *u;
|
|
|
|
guint i;
|
2004-06-11 17:34:32 +00:00
|
|
|
gboolean keyframe;
|
|
|
|
|
|
|
|
/* the second most significant bit of the first data byte is cleared
|
|
|
|
* for keyframes */
|
|
|
|
keyframe = (packet.packet[0] & 0x40) == 0;
|
|
|
|
if (keyframe) {
|
|
|
|
dec->need_keyframe = FALSE;
|
|
|
|
} else if (dec->need_keyframe) {
|
|
|
|
/* drop frames if we're looking for a keyframe */
|
|
|
|
gst_data_unref (data);
|
|
|
|
return;
|
|
|
|
}
|
2004-02-03 16:15:16 +00:00
|
|
|
#if 0
|
|
|
|
{
|
|
|
|
GTimeVal tv;
|
|
|
|
guint64 time;
|
2004-03-14 22:34:34 +00:00
|
|
|
|
2004-02-03 16:15:16 +00:00
|
|
|
g_get_current_time (&tv);
|
|
|
|
time = GST_TIMEVAL_TO_TIME (tv);
|
|
|
|
#endif
|
2004-03-14 22:34:34 +00:00
|
|
|
if (theora_decode_packetin (&dec->state, &packet)) {
|
2004-03-15 19:32:28 +00:00
|
|
|
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
|
|
|
|
(NULL), ("theora decoder did not read data packet"));
|
|
|
|
gst_data_unref (data);
|
|
|
|
return;
|
2004-03-14 22:34:34 +00:00
|
|
|
}
|
|
|
|
if (theora_decode_YUVout (&dec->state, &yuv) < 0) {
|
2004-03-15 19:32:28 +00:00
|
|
|
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
|
|
|
|
(NULL), ("couldn't read out YUV image"));
|
|
|
|
gst_data_unref (data);
|
|
|
|
return;
|
2004-03-14 22:34:34 +00:00
|
|
|
}
|
|
|
|
g_return_if_fail (yuv.y_width == dec->info.width);
|
|
|
|
g_return_if_fail (yuv.y_height == dec->info.height);
|
|
|
|
out = gst_pad_alloc_buffer (dec->srcpad, GST_BUFFER_OFFSET_NONE,
|
2004-03-15 19:32:28 +00:00
|
|
|
yuv.y_width * yuv.y_height * 12 / 8);
|
2004-03-14 22:34:34 +00:00
|
|
|
y = GST_BUFFER_DATA (out);
|
|
|
|
u = y + yuv.y_width * yuv.y_height;
|
|
|
|
v = u + yuv.y_width * yuv.y_height / 4;
|
|
|
|
for (i = 0; i < yuv.y_height; i++) {
|
2004-03-15 19:32:28 +00:00
|
|
|
memcpy (y + i * yuv.y_width, yuv.y + i * yuv.y_stride, yuv.y_width);
|
2004-03-14 22:34:34 +00:00
|
|
|
}
|
|
|
|
for (i = 0; i < yuv.y_height / 2; i++) {
|
2004-03-15 19:32:28 +00:00
|
|
|
memcpy (u + i * yuv.uv_width, yuv.u + i * yuv.uv_stride, yuv.uv_width);
|
|
|
|
memcpy (v + i * yuv.uv_width, yuv.v + i * yuv.uv_stride, yuv.uv_width);
|
2004-03-14 22:34:34 +00:00
|
|
|
}
|
|
|
|
GST_BUFFER_OFFSET (out) = dec->packetno - 4;
|
|
|
|
GST_BUFFER_OFFSET_END (out) = dec->packetno - 3;
|
|
|
|
GST_BUFFER_DURATION (out) =
|
2004-03-15 19:32:28 +00:00
|
|
|
GST_SECOND * ((gdouble) dec->info.fps_denominator) /
|
|
|
|
dec->info.fps_numerator;
|
2004-03-14 22:34:34 +00:00
|
|
|
GST_BUFFER_TIMESTAMP (out) =
|
2004-03-15 19:32:28 +00:00
|
|
|
GST_BUFFER_OFFSET (out) * GST_BUFFER_DURATION (out);
|
2004-02-03 16:15:16 +00:00
|
|
|
#if 0
|
|
|
|
g_get_current_time (&tv);
|
|
|
|
time = GST_TIMEVAL_TO_TIME (tv) - time;
|
|
|
|
if (time > 10000000)
|
2004-03-15 19:32:28 +00:00
|
|
|
g_print ("w00t, you're sl0000w!! - %llu\n", time);
|
2004-02-03 16:15:16 +00:00
|
|
|
}
|
|
|
|
#endif
|
2004-01-30 20:23:24 +00:00
|
|
|
gst_pad_push (dec->srcpad, GST_DATA (out));
|
|
|
|
}
|
|
|
|
gst_data_unref (data);
|
|
|
|
}
|
|
|
|
|
|
|
|
static GstElementStateReturn
|
2004-03-14 22:34:34 +00:00
|
|
|
theora_dec_change_state (GstElement * element)
|
2004-01-30 20:23:24 +00:00
|
|
|
{
|
|
|
|
GstTheoraDec *dec = GST_THEORA_DEC (element);
|
|
|
|
|
|
|
|
switch (GST_STATE_TRANSITION (element)) {
|
|
|
|
case GST_STATE_NULL_TO_READY:
|
|
|
|
break;
|
|
|
|
case GST_STATE_READY_TO_PAUSED:
|
|
|
|
theora_info_init (&dec->info);
|
|
|
|
theora_comment_init (&dec->comment);
|
2004-06-11 17:34:32 +00:00
|
|
|
dec->need_keyframe = TRUE;
|
2004-01-30 20:23:24 +00:00
|
|
|
break;
|
|
|
|
case GST_STATE_PAUSED_TO_PLAYING:
|
|
|
|
break;
|
|
|
|
case GST_STATE_PLAYING_TO_PAUSED:
|
|
|
|
break;
|
|
|
|
case GST_STATE_PAUSED_TO_READY:
|
|
|
|
theora_clear (&dec->state);
|
|
|
|
theora_comment_clear (&dec->comment);
|
|
|
|
theora_info_clear (&dec->info);
|
|
|
|
dec->packetno = 0;
|
|
|
|
dec->granulepos = 0;
|
|
|
|
break;
|
|
|
|
case GST_STATE_READY_TO_NULL:
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
g_assert_not_reached ();
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return parent_class->change_state (element);
|
|
|
|
}
|