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1706 lines
48 KiB
C
1706 lines
48 KiB
C
/* 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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/**
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* SECTION:element-theoradec
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* @see_also: theoraenc, oggdemux
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*
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* This element decodes theora streams into raw video
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* <ulink url="http://www.theora.org/">Theora</ulink> is a royalty-free
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* video codec maintained by the <ulink url="http://www.xiph.org/">Xiph.org
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* Foundation</ulink>, based on the VP3 codec.
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*
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* <refsect2>
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* <title>Example pipeline</title>
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* |[
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* gst-launch -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! xvimagesink
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* ]| This example pipeline will decode an ogg stream and decodes the theora video. Refer to
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* the theoraenc example to create the ogg file.
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* </refsect2>
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*
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* Last reviewed on 2006-03-01 (0.10.4)
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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 "gsttheoradec.h"
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#include <gst/tag/tag.h>
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#include <gst/video/video.h>
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#include <gst/video/gstmetavideo.h>
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#include <gst/video/gstvideopool.h>
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#define GST_CAT_DEFAULT theoradec_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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#define THEORA_DEF_CROP TRUE
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#define THEORA_DEF_TELEMETRY_MV 0
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#define THEORA_DEF_TELEMETRY_MBMODE 0
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#define THEORA_DEF_TELEMETRY_QI 0
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#define THEORA_DEF_TELEMETRY_BITS 0
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enum
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{
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PROP_0,
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PROP_CROP,
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PROP_TELEMETRY_MV,
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PROP_TELEMETRY_MBMODE,
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PROP_TELEMETRY_QI,
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PROP_TELEMETRY_BITS
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};
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static GstStaticPadTemplate theora_dec_src_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 ("video/x-raw, "
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"format = (string) { I420, Y42B, Y444 }, "
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"framerate = (fraction) [0/1, MAX], "
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"width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]")
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);
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static GstStaticPadTemplate theora_dec_sink_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 ("video/x-theora")
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);
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#define gst_theora_dec_parent_class parent_class
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G_DEFINE_TYPE (GstTheoraDec, gst_theora_dec, GST_TYPE_ELEMENT);
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static void theora_dec_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void theora_dec_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static gboolean theora_dec_setcaps (GstTheoraDec * dec, GstCaps * caps);
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static gboolean theora_dec_sink_event (GstPad * pad, GstEvent * event);
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static GstFlowReturn theora_dec_chain (GstPad * pad, GstBuffer * buffer);
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static GstStateChangeReturn theora_dec_change_state (GstElement * element,
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GstStateChange transition);
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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, GstQuery * query);
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static gboolean theora_dec_src_convert (GstPad * pad,
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GstFormat src_format, gint64 src_value,
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GstFormat * dest_format, gint64 * dest_value);
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#if 0
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static const GstFormat *theora_get_formats (GstPad * pad);
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#endif
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#if 0
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static const GstEventMask *theora_get_event_masks (GstPad * pad);
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#endif
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static const GstQueryType *theora_get_query_types (GstPad * pad);
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static gboolean
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gst_theora_dec_ctl_is_supported (int req)
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{
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/* should return TH_EFAULT or TH_EINVAL if supported, and TH_EIMPL if not */
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return (th_decode_ctl (NULL, req, NULL, 0) != TH_EIMPL);
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}
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static void
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gst_theora_dec_class_init (GstTheoraDecClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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gobject_class->set_property = theora_dec_set_property;
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gobject_class->get_property = theora_dec_get_property;
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g_object_class_install_property (gobject_class, PROP_CROP,
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g_param_spec_boolean ("crop", "Crop",
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"Crop the image to the visible region", THEORA_DEF_CROP,
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(GParamFlags) G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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if (gst_theora_dec_ctl_is_supported (TH_DECCTL_SET_TELEMETRY_MV)) {
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g_object_class_install_property (gobject_class, PROP_TELEMETRY_MV,
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g_param_spec_int ("visualize-motion-vectors",
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"Visualize motion vectors",
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"Show motion vector selection overlaid on image. "
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"Value gives a mask for motion vector (MV) modes to show",
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0, 0xffff, THEORA_DEF_TELEMETRY_MV,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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if (gst_theora_dec_ctl_is_supported (TH_DECCTL_SET_TELEMETRY_MBMODE)) {
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g_object_class_install_property (gobject_class, PROP_TELEMETRY_MBMODE,
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g_param_spec_int ("visualize-macroblock-modes",
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"Visualize macroblock modes",
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"Show macroblock mode selection overlaid on image. "
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"Value gives a mask for macroblock (MB) modes to show",
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0, 0xffff, THEORA_DEF_TELEMETRY_MBMODE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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if (gst_theora_dec_ctl_is_supported (TH_DECCTL_SET_TELEMETRY_QI)) {
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g_object_class_install_property (gobject_class, PROP_TELEMETRY_QI,
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g_param_spec_int ("visualize-quantization-modes",
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"Visualize adaptive quantization modes",
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"Show adaptive quantization mode selection overlaid on image. "
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"Value gives a mask for quantization (QI) modes to show",
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0, 0xffff, THEORA_DEF_TELEMETRY_QI,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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if (gst_theora_dec_ctl_is_supported (TH_DECCTL_SET_TELEMETRY_BITS)) {
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/* FIXME: make this a boolean instead? The value scales the bars so
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* they're less wide. Default is to use full width, and anything else
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* doesn't seem particularly useful, since the smaller bars just disappear
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* then (they almost disappear for a value of 2 already). */
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g_object_class_install_property (gobject_class, PROP_TELEMETRY_BITS,
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g_param_spec_int ("visualize-bit-usage",
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"Visualize bitstream usage breakdown",
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"Sets the bitstream breakdown visualization mode. "
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"Values influence the width of the bit usage bars to show",
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0, 0xff, THEORA_DEF_TELEMETRY_BITS,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&theora_dec_src_factory));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&theora_dec_sink_factory));
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gst_element_class_set_details_simple (gstelement_class,
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"Theora video decoder", "Codec/Decoder/Video",
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"decode raw theora streams to raw YUV video",
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"Benjamin Otte <otte@gnome.org>, Wim Taymans <wim@fluendo.com>");
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gstelement_class->change_state = theora_dec_change_state;
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GST_DEBUG_CATEGORY_INIT (theoradec_debug, "theoradec", 0, "Theora decoder");
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}
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static void
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gst_theora_dec_init (GstTheoraDec * dec)
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{
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dec->sinkpad =
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gst_pad_new_from_static_template (&theora_dec_sink_factory, "sink");
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gst_pad_set_event_function (dec->sinkpad, theora_dec_sink_event);
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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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dec->srcpad =
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gst_pad_new_from_static_template (&theora_dec_src_factory, "src");
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gst_pad_set_event_function (dec->srcpad, theora_dec_src_event);
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gst_pad_set_query_type_function (dec->srcpad, theora_get_query_types);
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gst_pad_set_query_function (dec->srcpad, theora_dec_src_query);
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gst_pad_use_fixed_caps (dec->srcpad);
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gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
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dec->crop = THEORA_DEF_CROP;
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dec->telemetry_mv = THEORA_DEF_TELEMETRY_MV;
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dec->telemetry_mbmode = THEORA_DEF_TELEMETRY_MBMODE;
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dec->telemetry_qi = THEORA_DEF_TELEMETRY_QI;
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dec->telemetry_bits = THEORA_DEF_TELEMETRY_BITS;
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dec->gather = NULL;
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dec->decode = NULL;
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dec->queued = NULL;
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dec->pendingevents = NULL;
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}
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static void
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gst_theora_dec_reset (GstTheoraDec * dec)
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{
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dec->need_keyframe = TRUE;
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dec->last_timestamp = -1;
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dec->discont = TRUE;
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dec->frame_nr = -1;
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dec->seqnum = gst_util_seqnum_next ();
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dec->dropped = 0;
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dec->processed = 0;
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gst_segment_init (&dec->segment, GST_FORMAT_TIME);
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GST_OBJECT_LOCK (dec);
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dec->proportion = 1.0;
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dec->earliest_time = -1;
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GST_OBJECT_UNLOCK (dec);
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g_list_foreach (dec->queued, (GFunc) gst_mini_object_unref, NULL);
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g_list_free (dec->queued);
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dec->queued = NULL;
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g_list_foreach (dec->gather, (GFunc) gst_mini_object_unref, NULL);
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g_list_free (dec->gather);
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dec->gather = NULL;
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g_list_foreach (dec->decode, (GFunc) gst_mini_object_unref, NULL);
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g_list_free (dec->decode);
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dec->decode = NULL;
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g_list_foreach (dec->pendingevents, (GFunc) gst_mini_object_unref, NULL);
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g_list_free (dec->pendingevents);
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dec->pendingevents = NULL;
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if (dec->tags) {
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gst_tag_list_free (dec->tags);
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dec->tags = NULL;
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}
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}
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#if 0
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static const GstFormat *
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theora_get_formats (GstPad * pad)
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{
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static GstFormat src_formats[] = {
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GST_FORMAT_DEFAULT, /* frames in this case */
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GST_FORMAT_TIME,
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GST_FORMAT_BYTES,
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0
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};
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static GstFormat sink_formats[] = {
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GST_FORMAT_DEFAULT,
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GST_FORMAT_TIME,
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0
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};
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return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
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}
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#endif
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#if 0
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static const GstEventMask *
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theora_get_event_masks (GstPad * pad)
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{
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static const GstEventMask theora_src_event_masks[] = {
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{GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
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{0,}
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};
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return theora_src_event_masks;
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}
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#endif
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static const GstQueryType *
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theora_get_query_types (GstPad * pad)
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{
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static const GstQueryType theora_src_query_types[] = {
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GST_QUERY_POSITION,
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GST_QUERY_DURATION,
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GST_QUERY_CONVERT,
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0
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};
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return theora_src_query_types;
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}
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static gboolean
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theora_dec_src_convert (GstPad * pad,
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GstFormat src_format, gint64 src_value,
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GstFormat * dest_format, gint64 * dest_value)
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{
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gboolean res = TRUE;
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GstTheoraDec *dec;
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guint64 scale = 1;
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if (src_format == *dest_format) {
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*dest_value = src_value;
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return TRUE;
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}
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dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
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/* we need the info part before we can done something */
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if (!dec->have_header)
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goto no_header;
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switch (src_format) {
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case GST_FORMAT_BYTES:
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switch (*dest_format) {
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case GST_FORMAT_DEFAULT:
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*dest_value = gst_util_uint64_scale_int (src_value, 8,
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dec->info.pic_height * dec->info.pic_width * dec->output_bpp);
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break;
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case GST_FORMAT_TIME:
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/* seems like a rather silly conversion, implement me if you like */
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default:
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res = FALSE;
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}
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break;
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case GST_FORMAT_TIME:
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switch (*dest_format) {
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case GST_FORMAT_BYTES:
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scale =
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dec->output_bpp * (dec->info.pic_width * dec->info.pic_height) /
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8;
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case GST_FORMAT_DEFAULT:
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*dest_value = scale * gst_util_uint64_scale (src_value,
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dec->info.fps_numerator, dec->info.fps_denominator * GST_SECOND);
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break;
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default:
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res = FALSE;
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}
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break;
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case GST_FORMAT_DEFAULT:
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switch (*dest_format) {
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case GST_FORMAT_TIME:
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*dest_value = gst_util_uint64_scale (src_value,
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GST_SECOND * dec->info.fps_denominator, dec->info.fps_numerator);
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break;
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case GST_FORMAT_BYTES:
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*dest_value = gst_util_uint64_scale_int (src_value,
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dec->output_bpp * dec->info.pic_width * dec->info.pic_height, 8);
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break;
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default:
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res = FALSE;
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}
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break;
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default:
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res = FALSE;
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}
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done:
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gst_object_unref (dec);
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return res;
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/* ERRORS */
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no_header:
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{
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GST_DEBUG_OBJECT (dec, "no header yet, cannot convert");
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res = FALSE;
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goto done;
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}
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}
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#if 0
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static gboolean
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theora_dec_sink_convert (GstPad * pad,
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GstFormat src_format, gint64 src_value,
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GstFormat * dest_format, gint64 * dest_value)
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{
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gboolean res = TRUE;
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GstTheoraDec *dec;
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if (src_format == *dest_format) {
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*dest_value = src_value;
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return TRUE;
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}
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dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
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/* we need the info part before we can done something */
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if (!dec->have_header)
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goto no_header;
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switch (src_format) {
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case GST_FORMAT_DEFAULT:
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switch (*dest_format) {
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case GST_FORMAT_TIME:
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*dest_value = _theora_granule_start_time (dec, src_value);
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break;
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default:
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res = FALSE;
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}
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break;
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case GST_FORMAT_TIME:
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switch (*dest_format) {
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case GST_FORMAT_DEFAULT:
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{
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guint rest;
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/* framecount */
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*dest_value = gst_util_uint64_scale (src_value,
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dec->info.fps_numerator, GST_SECOND * dec->info.fps_denominator);
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/* funny way of calculating granulepos in theora */
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rest = *dest_value / dec->info.keyframe_granule_shift;
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*dest_value -= rest;
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*dest_value <<= dec->granule_shift;
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*dest_value += rest;
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break;
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}
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default:
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res = FALSE;
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break;
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}
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break;
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default:
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res = FALSE;
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}
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done:
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gst_object_unref (dec);
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return res;
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/* ERRORS */
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no_header:
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{
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GST_DEBUG_OBJECT (dec, "no header yet, cannot convert");
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res = FALSE;
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goto done;
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}
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}
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#endif
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|
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static gboolean
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theora_dec_src_query (GstPad * pad, GstQuery * query)
|
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{
|
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GstTheoraDec *dec;
|
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|
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gboolean res = FALSE;
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|
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dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
|
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|
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_POSITION:
|
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{
|
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gint64 value;
|
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GstFormat format;
|
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gint64 time;
|
|
|
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/* parse format */
|
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gst_query_parse_position (query, &format, NULL);
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|
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time = dec->last_timestamp;
|
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time = gst_segment_to_stream_time (&dec->segment, GST_FORMAT_TIME, time);
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|
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GST_LOG_OBJECT (dec,
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"query %p: our time: %" GST_TIME_FORMAT, query, GST_TIME_ARGS (time));
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|
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if (!(res =
|
|
theora_dec_src_convert (pad, GST_FORMAT_TIME, time, &format,
|
|
&value)))
|
|
goto error;
|
|
|
|
gst_query_set_position (query, format, value);
|
|
|
|
GST_LOG_OBJECT (dec,
|
|
"query %p: we return %" G_GINT64_FORMAT " (format %u)", query, value,
|
|
format);
|
|
break;
|
|
}
|
|
case GST_QUERY_DURATION:
|
|
{
|
|
/* forward to peer for total */
|
|
res = gst_pad_peer_query (dec->sinkpad, query);
|
|
if (!res)
|
|
goto error;
|
|
|
|
break;
|
|
}
|
|
case GST_QUERY_CONVERT:
|
|
{
|
|
GstFormat src_fmt, dest_fmt;
|
|
gint64 src_val, dest_val;
|
|
|
|
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
|
|
if (!(res =
|
|
theora_dec_src_convert (pad, src_fmt, src_val, &dest_fmt,
|
|
&dest_val)))
|
|
goto error;
|
|
|
|
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
|
|
break;
|
|
}
|
|
default:
|
|
res = gst_pad_query_default (pad, query);
|
|
break;
|
|
}
|
|
done:
|
|
gst_object_unref (dec);
|
|
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
error:
|
|
{
|
|
GST_DEBUG_OBJECT (dec, "query failed");
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
theora_dec_src_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
gboolean res = TRUE;
|
|
GstTheoraDec *dec;
|
|
|
|
dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_SEEK:
|
|
{
|
|
GstFormat format, tformat;
|
|
gdouble rate;
|
|
GstEvent *real_seek;
|
|
GstSeekFlags flags;
|
|
GstSeekType cur_type, stop_type;
|
|
gint64 cur, stop;
|
|
gint64 tcur, tstop;
|
|
guint32 seqnum;
|
|
|
|
gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur,
|
|
&stop_type, &stop);
|
|
seqnum = gst_event_get_seqnum (event);
|
|
gst_event_unref (event);
|
|
|
|
/* we have to ask our peer to seek to time here as we know
|
|
* nothing about how to generate a granulepos from the src
|
|
* formats or anything.
|
|
*
|
|
* First bring the requested format to time
|
|
*/
|
|
tformat = GST_FORMAT_TIME;
|
|
if (!(res = theora_dec_src_convert (pad, format, cur, &tformat, &tcur)))
|
|
goto convert_error;
|
|
if (!(res = theora_dec_src_convert (pad, format, stop, &tformat, &tstop)))
|
|
goto convert_error;
|
|
|
|
/* then seek with time on the peer */
|
|
real_seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
|
|
flags, cur_type, tcur, stop_type, tstop);
|
|
gst_event_set_seqnum (real_seek, seqnum);
|
|
|
|
res = gst_pad_push_event (dec->sinkpad, real_seek);
|
|
break;
|
|
}
|
|
case GST_EVENT_QOS:
|
|
{
|
|
gdouble proportion;
|
|
GstClockTimeDiff diff;
|
|
GstClockTime timestamp;
|
|
|
|
gst_event_parse_qos (event, NULL, &proportion, &diff, ×tamp);
|
|
|
|
/* we cannot randomly skip frame decoding since we don't have
|
|
* B frames. we can however use the timestamp and diff to not
|
|
* push late frames. This would at least save us the time to
|
|
* crop/memcpy the data. */
|
|
GST_OBJECT_LOCK (dec);
|
|
dec->proportion = proportion;
|
|
dec->earliest_time = timestamp + diff;
|
|
GST_OBJECT_UNLOCK (dec);
|
|
|
|
GST_DEBUG_OBJECT (dec, "got QoS %" GST_TIME_FORMAT ", %" G_GINT64_FORMAT,
|
|
GST_TIME_ARGS (timestamp), diff);
|
|
|
|
res = gst_pad_push_event (dec->sinkpad, event);
|
|
break;
|
|
}
|
|
default:
|
|
res = gst_pad_push_event (dec->sinkpad, event);
|
|
break;
|
|
}
|
|
done:
|
|
gst_object_unref (dec);
|
|
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
convert_error:
|
|
{
|
|
GST_DEBUG_OBJECT (dec, "could not convert format");
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
theora_dec_sink_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstTheoraDec *dec;
|
|
|
|
dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
|
|
|
|
GST_LOG_OBJECT (dec, "handling event");
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_START:
|
|
ret = gst_pad_push_event (dec->srcpad, event);
|
|
break;
|
|
case GST_EVENT_FLUSH_STOP:
|
|
gst_theora_dec_reset (dec);
|
|
ret = gst_pad_push_event (dec->srcpad, event);
|
|
break;
|
|
case GST_EVENT_EOS:
|
|
ret = gst_pad_push_event (dec->srcpad, event);
|
|
break;
|
|
case GST_EVENT_SEGMENT:
|
|
{
|
|
const GstSegment *segment;
|
|
|
|
gst_event_parse_segment (event, &segment);
|
|
|
|
/* we need TIME format */
|
|
if (segment->format != GST_FORMAT_TIME)
|
|
goto newseg_wrong_format;
|
|
|
|
GST_DEBUG_OBJECT (dec, "segment: %" GST_SEGMENT_FORMAT, segment);
|
|
|
|
/* now configure the values */
|
|
gst_segment_copy_into (segment, &dec->segment);
|
|
dec->seqnum = gst_event_get_seqnum (event);
|
|
|
|
/* We don't forward this unless/until the decoder is initialised */
|
|
if (dec->have_header) {
|
|
ret = gst_pad_push_event (dec->srcpad, event);
|
|
} else {
|
|
dec->pendingevents = g_list_append (dec->pendingevents, event);
|
|
ret = TRUE;
|
|
}
|
|
break;
|
|
}
|
|
case GST_EVENT_CAPS:
|
|
{
|
|
GstCaps *caps;
|
|
|
|
gst_event_parse_caps (event, &caps);
|
|
ret = theora_dec_setcaps (dec, caps);
|
|
gst_event_unref (event);
|
|
break;
|
|
}
|
|
case GST_EVENT_TAG:
|
|
{
|
|
if (dec->have_header)
|
|
/* and forward */
|
|
ret = gst_pad_push_event (dec->srcpad, event);
|
|
else {
|
|
/* store it to send once we're initialized */
|
|
dec->pendingevents = g_list_append (dec->pendingevents, event);
|
|
ret = TRUE;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
done:
|
|
gst_object_unref (dec);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
newseg_wrong_format:
|
|
{
|
|
GST_DEBUG_OBJECT (dec, "received non TIME newsegment");
|
|
gst_event_unref (event);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
theora_dec_setcaps (GstTheoraDec * dec, GstCaps * caps)
|
|
{
|
|
GstStructure *s;
|
|
const GValue *codec_data;
|
|
|
|
s = gst_caps_get_structure (caps, 0);
|
|
|
|
/* parse the par, this overrides the encoded par */
|
|
dec->have_par = gst_structure_get_fraction (s, "pixel-aspect-ratio",
|
|
&dec->par_num, &dec->par_den);
|
|
|
|
if ((codec_data = gst_structure_get_value (s, "codec_data"))) {
|
|
if (G_VALUE_TYPE (codec_data) == GST_TYPE_BUFFER) {
|
|
GstBuffer *buffer;
|
|
guint8 *data, *ptr;
|
|
gsize size, left;
|
|
guint offset;
|
|
|
|
buffer = gst_value_get_buffer (codec_data);
|
|
|
|
offset = 0;
|
|
data = gst_buffer_map (buffer, &size, NULL, GST_MAP_READ);
|
|
|
|
ptr = data;
|
|
left = size;
|
|
|
|
while (left > 2) {
|
|
guint psize;
|
|
GstBuffer *buf;
|
|
|
|
psize = (ptr[0] << 8) | ptr[1];
|
|
/* skip header */
|
|
ptr += 2;
|
|
left -= 2;
|
|
offset += 2;
|
|
|
|
/* make sure we don't read too much */
|
|
psize = MIN (psize, left);
|
|
|
|
buf =
|
|
gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL, offset, psize);
|
|
|
|
/* first buffer is a discont buffer */
|
|
if (offset == 2)
|
|
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
|
|
|
|
/* now feed it to the decoder we can ignore the error */
|
|
theora_dec_chain (dec->sinkpad, buf);
|
|
|
|
/* skip the data */
|
|
left -= psize;
|
|
ptr += psize;
|
|
offset += psize;
|
|
}
|
|
gst_buffer_unmap (buffer, data, size);
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
theora_handle_comment_packet (GstTheoraDec * dec, ogg_packet * packet)
|
|
{
|
|
gchar *encoder = NULL;
|
|
GstTagList *list;
|
|
|
|
GST_DEBUG_OBJECT (dec, "parsing comment packet");
|
|
|
|
list =
|
|
gst_tag_list_from_vorbiscomment (packet->packet, packet->bytes,
|
|
(guint8 *) "\201theora", 7, &encoder);
|
|
|
|
if (!list) {
|
|
GST_ERROR_OBJECT (dec, "couldn't decode comments");
|
|
list = gst_tag_list_new ();
|
|
}
|
|
if (encoder) {
|
|
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
|
|
GST_TAG_ENCODER, encoder, NULL);
|
|
g_free (encoder);
|
|
}
|
|
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
|
|
GST_TAG_ENCODER_VERSION, dec->info.version_major,
|
|
GST_TAG_VIDEO_CODEC, "Theora", NULL);
|
|
|
|
if (dec->info.target_bitrate > 0) {
|
|
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
|
|
GST_TAG_BITRATE, dec->info.target_bitrate,
|
|
GST_TAG_NOMINAL_BITRATE, dec->info.target_bitrate, NULL);
|
|
}
|
|
|
|
dec->tags = list;
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
theora_negotiate_pool (GstTheoraDec * dec, GstCaps * caps, GstVideoInfo * info)
|
|
{
|
|
GstQuery *query;
|
|
GstBufferPool *pool = NULL;
|
|
guint size, min, max, prefix, alignment;
|
|
GstStructure *config;
|
|
|
|
/* find a pool for the negotiated caps now */
|
|
query = gst_query_new_allocation (caps, TRUE);
|
|
|
|
if (gst_pad_peer_query (dec->srcpad, query)) {
|
|
GST_DEBUG_OBJECT (dec, "got downstream ALLOCATION hints");
|
|
/* we got configuration from our peer, parse them */
|
|
gst_query_parse_allocation_params (query, &size, &min, &max, &prefix,
|
|
&alignment, &pool);
|
|
size = MAX (size, info->size);
|
|
} else {
|
|
GST_DEBUG_OBJECT (dec, "didn't get downstream ALLOCATION hints");
|
|
size = info->size;
|
|
min = max = 0;
|
|
prefix = 0;
|
|
alignment = 0;
|
|
}
|
|
|
|
if (pool == NULL) {
|
|
/* we did not get a pool, make one ourselves then */
|
|
pool = gst_buffer_pool_new ();
|
|
}
|
|
|
|
if (dec->pool)
|
|
gst_object_unref (dec->pool);
|
|
dec->pool = pool;
|
|
|
|
config = gst_buffer_pool_get_config (pool);
|
|
gst_buffer_pool_config_set (config, caps, size, min, max, prefix, alignment);
|
|
/* just set the option, if the pool can support it we will transparently use
|
|
* it through the video info API. We could also see if the pool support this
|
|
* option and only activate it then. */
|
|
gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_META_VIDEO);
|
|
|
|
/* check if downstream supports cropping */
|
|
dec->use_cropping =
|
|
gst_query_has_allocation_meta (query, GST_META_API_VIDEO_CROP);
|
|
|
|
gst_buffer_pool_set_config (pool, config);
|
|
/* and activate */
|
|
gst_buffer_pool_set_active (pool, TRUE);
|
|
|
|
gst_query_unref (query);
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
theora_handle_type_packet (GstTheoraDec * dec, ogg_packet * packet)
|
|
{
|
|
GstCaps *caps;
|
|
GstVideoFormat format;
|
|
gint width, height;
|
|
gint par_num, par_den;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GList *walk;
|
|
|
|
GST_DEBUG_OBJECT (dec, "fps %d/%d, PAR %d/%d",
|
|
dec->info.fps_numerator, dec->info.fps_denominator,
|
|
dec->info.aspect_numerator, dec->info.aspect_denominator);
|
|
|
|
/* calculate par
|
|
* the info.aspect_* values reflect PAR;
|
|
* 0:x and x:0 are allowed and can be interpreted as 1:1.
|
|
*/
|
|
if (dec->have_par) {
|
|
/* we had a par on the sink caps, override the encoded par */
|
|
GST_DEBUG_OBJECT (dec, "overriding with input PAR");
|
|
par_num = dec->par_num;
|
|
par_den = dec->par_den;
|
|
} else {
|
|
/* take encoded par */
|
|
par_num = dec->info.aspect_numerator;
|
|
par_den = dec->info.aspect_denominator;
|
|
}
|
|
if (par_num == 0 || par_den == 0) {
|
|
par_num = par_den = 1;
|
|
}
|
|
/* theora has:
|
|
*
|
|
* width/height : dimension of the encoded frame
|
|
* pic_width/pic_height : dimension of the visible part
|
|
* pic_x/pic_y : offset in encoded frame where visible part starts
|
|
*/
|
|
GST_DEBUG_OBJECT (dec, "dimension %dx%d, PAR %d/%d", dec->info.pic_width,
|
|
dec->info.pic_height, par_num, par_den);
|
|
GST_DEBUG_OBJECT (dec, "frame dimension %dx%d, offset %d:%d",
|
|
dec->info.pic_width, dec->info.pic_height,
|
|
dec->info.pic_x, dec->info.pic_y);
|
|
|
|
switch (dec->info.pixel_fmt) {
|
|
case TH_PF_444:
|
|
dec->output_bpp = 24;
|
|
format = GST_VIDEO_FORMAT_Y444;
|
|
break;
|
|
case TH_PF_420:
|
|
dec->output_bpp = 12; /* Average bits per pixel. */
|
|
format = GST_VIDEO_FORMAT_I420;
|
|
break;
|
|
case TH_PF_422:
|
|
dec->output_bpp = 16;
|
|
format = GST_VIDEO_FORMAT_Y42B;
|
|
break;
|
|
default:
|
|
goto invalid_format;
|
|
}
|
|
|
|
if (dec->crop) {
|
|
width = dec->info.pic_width;
|
|
height = dec->info.pic_height;
|
|
dec->offset_x = dec->info.pic_x;
|
|
dec->offset_y = dec->info.pic_y;
|
|
/* Ensure correct offsets in chroma for formats that need it
|
|
* by rounding the offset. libtheora will add proper pixels,
|
|
* so no need to handle them ourselves. */
|
|
if (dec->offset_x & 1 && dec->info.pixel_fmt != TH_PF_444) {
|
|
dec->offset_x--;
|
|
}
|
|
if (dec->offset_y & 1 && dec->info.pixel_fmt == TH_PF_420) {
|
|
dec->offset_y--;
|
|
}
|
|
} else {
|
|
/* no cropping, use the encoded dimensions */
|
|
width = dec->info.frame_width;
|
|
height = dec->info.frame_height;
|
|
dec->offset_x = 0;
|
|
dec->offset_y = 0;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (dec, "after fixup frame dimension %dx%d, offset %d:%d",
|
|
width, height, dec->offset_x, dec->offset_y);
|
|
|
|
/* done */
|
|
dec->decoder = th_decode_alloc (&dec->info, dec->setup);
|
|
|
|
if (th_decode_ctl (dec->decoder, TH_DECCTL_SET_TELEMETRY_MV,
|
|
&dec->telemetry_mv, sizeof (dec->telemetry_mv)) != TH_EIMPL) {
|
|
GST_WARNING_OBJECT (dec, "Could not enable MV visualisation");
|
|
}
|
|
if (th_decode_ctl (dec->decoder, TH_DECCTL_SET_TELEMETRY_MBMODE,
|
|
&dec->telemetry_mbmode, sizeof (dec->telemetry_mbmode)) != TH_EIMPL) {
|
|
GST_WARNING_OBJECT (dec, "Could not enable MB mode visualisation");
|
|
}
|
|
if (th_decode_ctl (dec->decoder, TH_DECCTL_SET_TELEMETRY_QI,
|
|
&dec->telemetry_qi, sizeof (dec->telemetry_qi)) != TH_EIMPL) {
|
|
GST_WARNING_OBJECT (dec, "Could not enable QI mode visualisation");
|
|
}
|
|
if (th_decode_ctl (dec->decoder, TH_DECCTL_SET_TELEMETRY_BITS,
|
|
&dec->telemetry_bits, sizeof (dec->telemetry_bits)) != TH_EIMPL) {
|
|
GST_WARNING_OBJECT (dec, "Could not enable BITS mode visualisation");
|
|
}
|
|
|
|
gst_video_info_set_format (&dec->vinfo, format, width, height);
|
|
dec->vinfo.fps_n = dec->info.fps_numerator;
|
|
dec->vinfo.fps_d = dec->info.fps_denominator;
|
|
dec->vinfo.par_n = par_num;
|
|
dec->vinfo.par_d = par_den;
|
|
dec->vinfo.chroma_site = "jpeg";
|
|
dec->vinfo.color_matrix = "sdtv";
|
|
|
|
caps = gst_video_info_to_caps (&dec->vinfo);
|
|
gst_pad_set_caps (dec->srcpad, caps);
|
|
gst_caps_unref (caps);
|
|
|
|
/* negotiate a bufferpool */
|
|
if ((ret = theora_negotiate_pool (dec, caps, &dec->vinfo)) != GST_FLOW_OK)
|
|
goto no_bufferpool;
|
|
|
|
dec->have_header = TRUE;
|
|
|
|
if (dec->pendingevents) {
|
|
for (walk = dec->pendingevents; walk; walk = g_list_next (walk))
|
|
gst_pad_push_event (dec->srcpad, GST_EVENT_CAST (walk->data));
|
|
g_list_free (dec->pendingevents);
|
|
dec->pendingevents = NULL;
|
|
}
|
|
|
|
if (dec->tags) {
|
|
gst_element_found_tags_for_pad (GST_ELEMENT_CAST (dec), dec->srcpad,
|
|
dec->tags);
|
|
dec->tags = NULL;
|
|
}
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
invalid_format:
|
|
{
|
|
GST_ERROR_OBJECT (dec, "Invalid pixel format %d", dec->info.pixel_fmt);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
no_bufferpool:
|
|
{
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
theora_handle_header_packet (GstTheoraDec * dec, ogg_packet * packet)
|
|
{
|
|
GstFlowReturn res;
|
|
int ret;
|
|
|
|
GST_DEBUG_OBJECT (dec, "parsing header packet");
|
|
|
|
ret = th_decode_headerin (&dec->info, &dec->comment, &dec->setup, packet);
|
|
if (ret < 0)
|
|
goto header_read_error;
|
|
|
|
switch (packet->packet[0]) {
|
|
case 0x81:
|
|
res = theora_handle_comment_packet (dec, packet);
|
|
break;
|
|
case 0x82:
|
|
res = theora_handle_type_packet (dec, packet);
|
|
break;
|
|
default:
|
|
/* ignore */
|
|
g_warning ("unknown theora header packet found");
|
|
case 0x80:
|
|
/* nothing special, this is the identification header */
|
|
res = GST_FLOW_OK;
|
|
break;
|
|
}
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
header_read_error:
|
|
{
|
|
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
|
|
(NULL), ("couldn't read header packet"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
/* returns TRUE if buffer is within segment, else FALSE.
|
|
* if Buffer is on segment border, it's timestamp and duration will be clipped */
|
|
static gboolean
|
|
clip_buffer (GstTheoraDec * dec, GstBuffer * buf)
|
|
{
|
|
gboolean res = TRUE;
|
|
GstClockTime in_ts, in_dur, stop;
|
|
guint64 cstart, cstop;
|
|
|
|
in_ts = GST_BUFFER_TIMESTAMP (buf);
|
|
in_dur = GST_BUFFER_DURATION (buf);
|
|
|
|
GST_LOG_OBJECT (dec,
|
|
"timestamp:%" GST_TIME_FORMAT " , duration:%" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (in_ts), GST_TIME_ARGS (in_dur));
|
|
|
|
/* can't clip without TIME segment */
|
|
if (dec->segment.format != GST_FORMAT_TIME)
|
|
goto beach;
|
|
|
|
/* we need a start time */
|
|
if (!GST_CLOCK_TIME_IS_VALID (in_ts))
|
|
goto beach;
|
|
|
|
/* generate valid stop, if duration unknown, we have unknown stop */
|
|
stop =
|
|
GST_CLOCK_TIME_IS_VALID (in_dur) ? (in_ts + in_dur) : GST_CLOCK_TIME_NONE;
|
|
|
|
/* now clip */
|
|
if (!(res = gst_segment_clip (&dec->segment, GST_FORMAT_TIME,
|
|
in_ts, stop, &cstart, &cstop)))
|
|
goto beach;
|
|
|
|
/* update timestamp and possibly duration if the clipped stop time is
|
|
* valid */
|
|
GST_BUFFER_TIMESTAMP (buf) = cstart;
|
|
if (GST_CLOCK_TIME_IS_VALID (cstop))
|
|
GST_BUFFER_DURATION (buf) = cstop - cstart;
|
|
|
|
beach:
|
|
GST_LOG_OBJECT (dec, "%sdropping", (res ? "not " : ""));
|
|
return res;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
theora_dec_push_forward (GstTheoraDec * dec, GstBuffer * buf)
|
|
{
|
|
GstFlowReturn result = GST_FLOW_OK;
|
|
|
|
if (clip_buffer (dec, buf)) {
|
|
if (dec->discont) {
|
|
GST_LOG_OBJECT (dec, "setting DISCONT");
|
|
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
|
|
dec->discont = FALSE;
|
|
}
|
|
result = gst_pad_push (dec->srcpad, buf);
|
|
} else {
|
|
gst_buffer_unref (buf);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
theora_dec_push_reverse (GstTheoraDec * dec, GstBuffer * buf)
|
|
{
|
|
GstFlowReturn result = GST_FLOW_OK;
|
|
|
|
dec->queued = g_list_prepend (dec->queued, buf);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Allocate buffer and copy image data into Y444 format */
|
|
static GstFlowReturn
|
|
theora_handle_image (GstTheoraDec * dec, th_ycbcr_buffer buf, GstBuffer ** out)
|
|
{
|
|
gint width, height, stride;
|
|
gint pic_width, pic_height;
|
|
GstFlowReturn result;
|
|
int i, comp;
|
|
guint8 *dest, *src;
|
|
GstVideoFrame frame;
|
|
GstMetaVideoCrop *crop;
|
|
gint offset_x, offset_y;
|
|
|
|
if (gst_pad_check_reconfigure (dec->srcpad)) {
|
|
GstCaps *caps;
|
|
|
|
caps = gst_pad_get_current_caps (dec->srcpad);
|
|
theora_negotiate_pool (dec, caps, &dec->vinfo);
|
|
gst_caps_unref (caps);
|
|
}
|
|
|
|
result = gst_buffer_pool_acquire_buffer (dec->pool, out, NULL);
|
|
if (G_UNLIKELY (result != GST_FLOW_OK))
|
|
goto no_buffer;
|
|
|
|
if (!gst_video_frame_map (&frame, &dec->vinfo, *out, GST_MAP_WRITE))
|
|
goto invalid_frame;
|
|
|
|
if (dec->crop && !dec->use_cropping) {
|
|
/* we need to crop the hard way */
|
|
offset_x = dec->info.pic_x;
|
|
offset_y = dec->info.pic_y;
|
|
pic_width = dec->info.pic_width;
|
|
pic_height = dec->info.pic_height;
|
|
/* Ensure correct offsets in chroma for formats that need it
|
|
* by rounding the offset. libtheora will add proper pixels,
|
|
* so no need to handle them ourselves. */
|
|
if (offset_x & 1 && dec->info.pixel_fmt != TH_PF_444)
|
|
offset_x--;
|
|
if (offset_y & 1 && dec->info.pixel_fmt == TH_PF_420)
|
|
offset_y--;
|
|
} else {
|
|
/* copy the whole frame */
|
|
offset_x = 0;
|
|
offset_y = 0;
|
|
pic_width = dec->info.frame_width;
|
|
pic_height = dec->info.frame_height;
|
|
|
|
if (dec->use_cropping) {
|
|
crop = gst_buffer_add_meta_video_crop (*out);
|
|
/* we can do things slightly more efficient when we know that
|
|
* downstream understands clipping */
|
|
crop->x = dec->info.pic_x;
|
|
crop->y = dec->info.pic_y;
|
|
crop->width = dec->info.pic_width;
|
|
crop->height = dec->info.pic_height;
|
|
}
|
|
}
|
|
|
|
for (comp = 0; comp < 3; comp++) {
|
|
width =
|
|
GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (frame.info.finfo, comp, pic_width);
|
|
height =
|
|
GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (frame.info.finfo, comp, pic_height);
|
|
stride = GST_VIDEO_FRAME_COMP_STRIDE (&frame, comp);
|
|
dest = GST_VIDEO_FRAME_COMP_DATA (&frame, comp);
|
|
|
|
src = buf[comp].data;
|
|
src += ((height == pic_height) ? offset_y : offset_y / 2)
|
|
* buf[comp].stride;
|
|
src += (width == pic_width) ? offset_x : offset_x / 2;
|
|
|
|
for (i = 0; i < height; i++) {
|
|
memcpy (dest, src, width);
|
|
|
|
dest += stride;
|
|
src += buf[comp].stride;
|
|
}
|
|
}
|
|
gst_video_frame_unmap (&frame);
|
|
|
|
return GST_FLOW_OK;
|
|
|
|
/* ERRORS */
|
|
no_buffer:
|
|
{
|
|
GST_DEBUG_OBJECT (dec, "could not get buffer, reason: %s",
|
|
gst_flow_get_name (result));
|
|
return result;
|
|
}
|
|
invalid_frame:
|
|
{
|
|
GST_DEBUG_OBJECT (dec, "could not map video frame");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
theora_handle_data_packet (GstTheoraDec * dec, ogg_packet * packet,
|
|
GstClockTime outtime, GstClockTime outdur)
|
|
{
|
|
/* normal data packet */
|
|
th_ycbcr_buffer buf;
|
|
GstBuffer *out;
|
|
gboolean keyframe;
|
|
GstFlowReturn result;
|
|
ogg_int64_t gp;
|
|
|
|
if (G_UNLIKELY (!dec->have_header))
|
|
goto not_initialized;
|
|
|
|
/* get timestamp and durations */
|
|
if (outtime == -1)
|
|
outtime = dec->last_timestamp;
|
|
if (outdur == -1)
|
|
outdur = gst_util_uint64_scale_int (GST_SECOND, dec->info.fps_denominator,
|
|
dec->info.fps_numerator);
|
|
|
|
/* calculate expected next timestamp */
|
|
if (outtime != -1 && outdur != -1)
|
|
dec->last_timestamp = outtime + outdur;
|
|
|
|
/* the second most significant bit of the first data byte is cleared
|
|
* for keyframes. We can only check it if it's not a zero-length packet. */
|
|
keyframe = packet->bytes && ((packet->packet[0] & 0x40) == 0);
|
|
if (G_UNLIKELY (keyframe)) {
|
|
GST_DEBUG_OBJECT (dec, "we have a keyframe");
|
|
dec->need_keyframe = FALSE;
|
|
} else if (G_UNLIKELY (dec->need_keyframe)) {
|
|
goto dropping;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (dec, "parsing data packet");
|
|
|
|
/* this does the decoding */
|
|
if (G_UNLIKELY (th_decode_packetin (dec->decoder, packet, &gp) < 0))
|
|
goto decode_error;
|
|
|
|
if (outtime != -1) {
|
|
gboolean need_skip;
|
|
GstClockTime running_time;
|
|
GstClockTime earliest_time;
|
|
gdouble proportion;
|
|
|
|
/* qos needs to be done on running time */
|
|
running_time = gst_segment_to_running_time (&dec->segment, GST_FORMAT_TIME,
|
|
outtime);
|
|
|
|
GST_OBJECT_LOCK (dec);
|
|
proportion = dec->proportion;
|
|
earliest_time = dec->earliest_time;
|
|
/* check for QoS, don't perform the last steps of getting and
|
|
* pushing the buffers that are known to be late. */
|
|
need_skip = earliest_time != -1 && running_time <= earliest_time;
|
|
GST_OBJECT_UNLOCK (dec);
|
|
|
|
if (need_skip) {
|
|
GstMessage *qos_msg;
|
|
guint64 stream_time;
|
|
gint64 jitter;
|
|
|
|
GST_DEBUG_OBJECT (dec, "skipping decoding: qostime %"
|
|
GST_TIME_FORMAT " <= %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (running_time), GST_TIME_ARGS (earliest_time));
|
|
|
|
dec->dropped++;
|
|
|
|
stream_time =
|
|
gst_segment_to_stream_time (&dec->segment, GST_FORMAT_TIME, outtime);
|
|
jitter = GST_CLOCK_DIFF (running_time, earliest_time);
|
|
|
|
qos_msg =
|
|
gst_message_new_qos (GST_OBJECT_CAST (dec), FALSE, running_time,
|
|
stream_time, outtime, outdur);
|
|
gst_message_set_qos_values (qos_msg, jitter, proportion, 1000000);
|
|
gst_message_set_qos_stats (qos_msg, GST_FORMAT_BUFFERS,
|
|
dec->processed, dec->dropped);
|
|
gst_element_post_message (GST_ELEMENT_CAST (dec), qos_msg);
|
|
|
|
goto dropping_qos;
|
|
}
|
|
}
|
|
|
|
/* this does postprocessing and set up the decoded frame
|
|
* pointers in our yuv variable */
|
|
if (G_UNLIKELY (th_decode_ycbcr_out (dec->decoder, buf) < 0))
|
|
goto no_yuv;
|
|
|
|
if (G_UNLIKELY ((buf[0].width != dec->info.frame_width)
|
|
|| (buf[0].height != dec->info.frame_height)))
|
|
goto wrong_dimensions;
|
|
|
|
result = theora_handle_image (dec, buf, &out);
|
|
if (result != GST_FLOW_OK)
|
|
return result;
|
|
|
|
GST_BUFFER_OFFSET (out) = dec->frame_nr;
|
|
if (dec->frame_nr != -1)
|
|
dec->frame_nr++;
|
|
GST_BUFFER_OFFSET_END (out) = dec->frame_nr;
|
|
|
|
GST_BUFFER_TIMESTAMP (out) = outtime;
|
|
GST_BUFFER_DURATION (out) = outdur;
|
|
|
|
dec->processed++;
|
|
|
|
if (dec->segment.rate >= 0.0)
|
|
result = theora_dec_push_forward (dec, out);
|
|
else
|
|
result = theora_dec_push_reverse (dec, out);
|
|
|
|
return result;
|
|
|
|
/* ERRORS */
|
|
not_initialized:
|
|
{
|
|
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
|
|
(NULL), ("no header sent yet"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
dropping:
|
|
{
|
|
GST_WARNING_OBJECT (dec, "dropping frame because we need a keyframe");
|
|
dec->discont = TRUE;
|
|
return GST_FLOW_OK;
|
|
}
|
|
dropping_qos:
|
|
{
|
|
if (dec->frame_nr != -1)
|
|
dec->frame_nr++;
|
|
dec->discont = TRUE;
|
|
GST_WARNING_OBJECT (dec, "dropping frame because of QoS");
|
|
return GST_FLOW_OK;
|
|
}
|
|
decode_error:
|
|
{
|
|
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
|
|
(NULL), ("theora decoder did not decode data packet"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
no_yuv:
|
|
{
|
|
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
|
|
(NULL), ("couldn't read out YUV image"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
wrong_dimensions:
|
|
{
|
|
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, FORMAT,
|
|
(NULL), ("dimensions of image do not match header"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
theora_dec_decode_buffer (GstTheoraDec * dec, GstBuffer * buf)
|
|
{
|
|
ogg_packet packet;
|
|
GstFlowReturn result = GST_FLOW_OK;
|
|
GstClockTime timestamp, duration;
|
|
gsize size;
|
|
|
|
/* make ogg_packet out of the buffer */
|
|
packet.packet = gst_buffer_map (buf, &size, NULL, GST_MAP_READ);
|
|
packet.bytes = size;
|
|
packet.granulepos = -1;
|
|
packet.packetno = 0; /* we don't really care */
|
|
packet.b_o_s = dec->have_header ? 0 : 1;
|
|
/* EOS does not matter for the decoder */
|
|
packet.e_o_s = 0;
|
|
|
|
GST_LOG_OBJECT (dec, "decode buffer of size %ld", packet.bytes);
|
|
|
|
/* save last seem timestamp for interpolating the next timestamps using the
|
|
* framerate when we need to */
|
|
timestamp = GST_BUFFER_TIMESTAMP (buf);
|
|
duration = GST_BUFFER_DURATION (buf);
|
|
|
|
GST_DEBUG_OBJECT (dec, "header=%02x, outtime=%" GST_TIME_FORMAT,
|
|
packet.bytes ? packet.packet[0] : -1, GST_TIME_ARGS (timestamp));
|
|
|
|
/* switch depending on packet type. A zero byte packet is always a data
|
|
* packet; we don't dereference it in that case. */
|
|
if (packet.bytes && packet.packet[0] & 0x80) {
|
|
if (dec->have_header) {
|
|
GST_WARNING_OBJECT (GST_OBJECT (dec), "Ignoring header");
|
|
goto done;
|
|
}
|
|
result = theora_handle_header_packet (dec, &packet);
|
|
} else {
|
|
result = theora_handle_data_packet (dec, &packet, timestamp, duration);
|
|
}
|
|
done:
|
|
gst_buffer_unmap (buf, packet.packet, size);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* For reverse playback we use a technique that can be used for
|
|
* any keyframe based video codec.
|
|
*
|
|
* Input:
|
|
* Buffer decoding order: 7 8 9 4 5 6 1 2 3 EOS
|
|
* Keyframe flag: K K
|
|
* Discont flag: D D D
|
|
*
|
|
* - Each Discont marks a discont in the decoding order.
|
|
* - The keyframes mark where we can start decoding.
|
|
*
|
|
* First we prepend incomming buffers to the gather queue, whenever we receive
|
|
* a discont, we flush out the gather queue.
|
|
*
|
|
* The above data will be accumulated in the gather queue like this:
|
|
*
|
|
* gather queue: 9 8 7
|
|
* D
|
|
*
|
|
* Whe buffer 4 is received (with a DISCONT), we flush the gather queue like
|
|
* this:
|
|
*
|
|
* while (gather)
|
|
* take head of queue and prepend to decode queue.
|
|
* if we copied a keyframe, decode the decode queue.
|
|
*
|
|
* After we flushed the gather queue, we add 4 to the (now empty) gather queue.
|
|
* We get the following situation:
|
|
*
|
|
* gather queue: 4
|
|
* decode queue: 7 8 9
|
|
*
|
|
* After we received 5 (Keyframe) and 6:
|
|
*
|
|
* gather queue: 6 5 4
|
|
* decode queue: 7 8 9
|
|
*
|
|
* When we receive 1 (DISCONT) which triggers a flush of the gather queue:
|
|
*
|
|
* Copy head of the gather queue (6) to decode queue:
|
|
*
|
|
* gather queue: 5 4
|
|
* decode queue: 6 7 8 9
|
|
*
|
|
* Copy head of the gather queue (5) to decode queue. This is a keyframe so we
|
|
* can start decoding.
|
|
*
|
|
* gather queue: 4
|
|
* decode queue: 5 6 7 8 9
|
|
*
|
|
* Decode frames in decode queue, store raw decoded data in output queue, we
|
|
* can take the head of the decode queue and prepend the decoded result in the
|
|
* output queue:
|
|
*
|
|
* gather queue: 4
|
|
* decode queue:
|
|
* output queue: 9 8 7 6 5
|
|
*
|
|
* Now output all the frames in the output queue, picking a frame from the
|
|
* head of the queue.
|
|
*
|
|
* Copy head of the gather queue (4) to decode queue, we flushed the gather
|
|
* queue and can now store input buffer in the gather queue:
|
|
*
|
|
* gather queue: 1
|
|
* decode queue: 4
|
|
*
|
|
* When we receive EOS, the queue looks like:
|
|
*
|
|
* gather queue: 3 2 1
|
|
* decode queue: 4
|
|
*
|
|
* Fill decode queue, first keyframe we copy is 2:
|
|
*
|
|
* gather queue: 1
|
|
* decode queue: 2 3 4
|
|
*
|
|
* Decoded output:
|
|
*
|
|
* gather queue: 1
|
|
* decode queue:
|
|
* output queue: 4 3 2
|
|
*
|
|
* Leftover buffer 1 cannot be decoded and must be discarded.
|
|
*/
|
|
static GstFlowReturn
|
|
theora_dec_flush_decode (GstTheoraDec * dec)
|
|
{
|
|
GstFlowReturn res = GST_FLOW_OK;
|
|
|
|
while (dec->decode) {
|
|
GstBuffer *buf = GST_BUFFER_CAST (dec->decode->data);
|
|
|
|
GST_DEBUG_OBJECT (dec, "decoding buffer %p, ts %" GST_TIME_FORMAT,
|
|
buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
|
|
|
|
/* decode buffer, prepend to output queue */
|
|
res = theora_dec_decode_buffer (dec, buf);
|
|
|
|
/* don't need it anymore now */
|
|
gst_buffer_unref (buf);
|
|
|
|
dec->decode = g_list_delete_link (dec->decode, dec->decode);
|
|
}
|
|
while (dec->queued) {
|
|
GstBuffer *buf = GST_BUFFER_CAST (dec->queued->data);
|
|
|
|
/* iterate ouput queue an push downstream */
|
|
res = gst_pad_push (dec->srcpad, buf);
|
|
|
|
dec->queued = g_list_delete_link (dec->queued, dec->queued);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
theora_dec_chain_reverse (GstTheoraDec * dec, gboolean discont, GstBuffer * buf)
|
|
{
|
|
GstFlowReturn res = GST_FLOW_OK;
|
|
|
|
/* if we have a discont, move buffers to the decode list */
|
|
if (G_UNLIKELY (discont)) {
|
|
GST_DEBUG_OBJECT (dec, "received discont,gathering buffers");
|
|
while (dec->gather) {
|
|
GstBuffer *gbuf;
|
|
guint8 data[1];
|
|
|
|
gbuf = GST_BUFFER_CAST (dec->gather->data);
|
|
/* remove from the gather list */
|
|
dec->gather = g_list_delete_link (dec->gather, dec->gather);
|
|
/* copy to decode queue */
|
|
dec->decode = g_list_prepend (dec->decode, gbuf);
|
|
|
|
/* if we copied a keyframe, flush and decode the decode queue */
|
|
gst_buffer_extract (gbuf, 0, data, 1);
|
|
if ((data[0] & 0x40) == 0) {
|
|
GST_DEBUG_OBJECT (dec, "copied keyframe");
|
|
res = theora_dec_flush_decode (dec);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* add buffer to gather queue */
|
|
GST_DEBUG_OBJECT (dec, "gathering buffer %p, size %u", buf,
|
|
gst_buffer_get_size (buf));
|
|
dec->gather = g_list_prepend (dec->gather, buf);
|
|
|
|
return res;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
theora_dec_chain_forward (GstTheoraDec * dec, gboolean discont,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstFlowReturn result;
|
|
|
|
result = theora_dec_decode_buffer (dec, buffer);
|
|
|
|
gst_buffer_unref (buffer);
|
|
|
|
return result;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
theora_dec_chain (GstPad * pad, GstBuffer * buf)
|
|
{
|
|
GstTheoraDec *dec;
|
|
GstFlowReturn res;
|
|
gboolean discont;
|
|
|
|
dec = GST_THEORA_DEC (gst_pad_get_parent (pad));
|
|
|
|
/* peel of DISCONT flag */
|
|
discont = GST_BUFFER_IS_DISCONT (buf);
|
|
|
|
/* resync on DISCONT */
|
|
if (G_UNLIKELY (discont)) {
|
|
GST_DEBUG_OBJECT (dec, "received DISCONT buffer");
|
|
dec->need_keyframe = TRUE;
|
|
dec->last_timestamp = -1;
|
|
dec->discont = TRUE;
|
|
}
|
|
|
|
if (dec->segment.rate > 0.0)
|
|
res = theora_dec_chain_forward (dec, discont, buf);
|
|
else
|
|
res = theora_dec_chain_reverse (dec, discont, buf);
|
|
|
|
gst_object_unref (dec);
|
|
|
|
return res;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
theora_dec_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstTheoraDec *dec = GST_THEORA_DEC (element);
|
|
GstStateChangeReturn ret;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
th_info_clear (&dec->info);
|
|
th_comment_clear (&dec->comment);
|
|
GST_DEBUG_OBJECT (dec, "Setting have_header to FALSE in READY->PAUSED");
|
|
dec->have_header = FALSE;
|
|
dec->have_par = FALSE;
|
|
gst_theora_dec_reset (dec);
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
th_info_clear (&dec->info);
|
|
th_comment_clear (&dec->comment);
|
|
th_setup_free (dec->setup);
|
|
dec->setup = NULL;
|
|
th_decode_free (dec->decoder);
|
|
dec->decoder = NULL;
|
|
gst_theora_dec_reset (dec);
|
|
if (dec->pool) {
|
|
gst_buffer_pool_set_active (dec->pool, FALSE);
|
|
gst_object_unref (dec->pool);
|
|
dec->pool = NULL;
|
|
}
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
theora_dec_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstTheoraDec *dec = GST_THEORA_DEC (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_CROP:
|
|
dec->crop = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_TELEMETRY_MV:
|
|
dec->telemetry_mv = g_value_get_int (value);
|
|
break;
|
|
case PROP_TELEMETRY_MBMODE:
|
|
dec->telemetry_mbmode = g_value_get_int (value);
|
|
break;
|
|
case PROP_TELEMETRY_QI:
|
|
dec->telemetry_qi = g_value_get_int (value);
|
|
break;
|
|
case PROP_TELEMETRY_BITS:
|
|
dec->telemetry_bits = g_value_get_int (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
theora_dec_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstTheoraDec *dec = GST_THEORA_DEC (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_CROP:
|
|
g_value_set_boolean (value, dec->crop);
|
|
break;
|
|
case PROP_TELEMETRY_MV:
|
|
g_value_set_int (value, dec->telemetry_mv);
|
|
break;
|
|
case PROP_TELEMETRY_MBMODE:
|
|
g_value_set_int (value, dec->telemetry_mbmode);
|
|
break;
|
|
case PROP_TELEMETRY_QI:
|
|
g_value_set_int (value, dec->telemetry_qi);
|
|
break;
|
|
case PROP_TELEMETRY_BITS:
|
|
g_value_set_int (value, dec->telemetry_bits);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|