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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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480 lines
13 KiB
C
480 lines
13 KiB
C
/* GStreamer
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* Copyright (C) 2010 David Schleef <ds@schleef.org>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-diracparse
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* @title: gstdiracparse
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*
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* The gstdiracparse element does FIXME stuff.
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*
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* ## Example launch line
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* |[
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* gst-launch-1.0 -v fakesrc ! gstdiracparse ! FIXME ! fakesink
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* ]|
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* FIXME Describe what the pipeline does.
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*
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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 <gst/base/base.h>
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#include <gst/pbutils/pbutils.h>
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#include <string.h>
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#include "gstvideoparserselements.h"
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#include "gstdiracparse.h"
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#include "dirac_parse.h"
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/* prototypes */
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static void gst_dirac_parse_set_property (GObject * object,
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guint property_id, const GValue * value, GParamSpec * pspec);
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static void gst_dirac_parse_get_property (GObject * object,
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guint property_id, GValue * value, GParamSpec * pspec);
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static void gst_dirac_parse_dispose (GObject * object);
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static void gst_dirac_parse_finalize (GObject * object);
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static gboolean gst_dirac_parse_start (GstBaseParse * parse);
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static gboolean gst_dirac_parse_stop (GstBaseParse * parse);
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static gboolean gst_dirac_parse_set_sink_caps (GstBaseParse * parse,
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GstCaps * caps);
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static GstCaps *gst_dirac_parse_get_sink_caps (GstBaseParse * parse,
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GstCaps * filter);
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static GstFlowReturn gst_dirac_parse_handle_frame (GstBaseParse * parse,
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GstBaseParseFrame * frame, gint * skipsize);
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static gboolean gst_dirac_parse_convert (GstBaseParse * parse,
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GstFormat src_format, gint64 src_value, GstFormat dest_format,
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gint64 * dest_value);
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static GstFlowReturn gst_dirac_parse_pre_push_frame (GstBaseParse * parse,
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GstBaseParseFrame * frame);
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enum
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{
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PROP_0
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};
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/* pad templates */
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static GstStaticPadTemplate gst_dirac_parse_sink_template =
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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-dirac")
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);
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static GstStaticPadTemplate gst_dirac_parse_src_template =
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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-dirac, parsed=(boolean)TRUE, "
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"width=(int)[1,MAX], height=(int)[1,MAX], "
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"framerate=(fraction)[0/1,MAX], "
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"pixel-aspect-ratio=(fraction)[0/1,MAX], "
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"interlace-mode=(string) { progressive, interleaved }, "
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"profile=(string){ vc2-low-delay, vc2-simple, vc2-main, main }, "
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"level=(string) { 0, 1, 128}")
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);
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/* class initialization */
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#define parent_class gst_dirac_parse_parent_class
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G_DEFINE_TYPE (GstDiracParse, gst_dirac_parse, GST_TYPE_BASE_PARSE);
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (diracparse, "diracparse", GST_RANK_NONE,
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GST_TYPE_DIRAC_PARSE, videoparsers_element_init (plugin));
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static void
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gst_dirac_parse_class_init (GstDiracParseClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GstBaseParseClass *base_parse_class = GST_BASE_PARSE_CLASS (klass);
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gobject_class->set_property = gst_dirac_parse_set_property;
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gobject_class->get_property = gst_dirac_parse_get_property;
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gobject_class->dispose = gst_dirac_parse_dispose;
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gobject_class->finalize = gst_dirac_parse_finalize;
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gst_element_class_add_static_pad_template (element_class,
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&gst_dirac_parse_src_template);
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gst_element_class_add_static_pad_template (element_class,
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&gst_dirac_parse_sink_template);
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gst_element_class_set_static_metadata (element_class, "Dirac parser",
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"Codec/Parser/Video", "Parses Dirac streams",
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"David Schleef <ds@schleef.org>");
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base_parse_class->start = GST_DEBUG_FUNCPTR (gst_dirac_parse_start);
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base_parse_class->stop = GST_DEBUG_FUNCPTR (gst_dirac_parse_stop);
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base_parse_class->set_sink_caps =
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GST_DEBUG_FUNCPTR (gst_dirac_parse_set_sink_caps);
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base_parse_class->get_sink_caps =
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GST_DEBUG_FUNCPTR (gst_dirac_parse_get_sink_caps);
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base_parse_class->handle_frame =
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GST_DEBUG_FUNCPTR (gst_dirac_parse_handle_frame);
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base_parse_class->convert = GST_DEBUG_FUNCPTR (gst_dirac_parse_convert);
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base_parse_class->pre_push_frame =
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GST_DEBUG_FUNCPTR (gst_dirac_parse_pre_push_frame);
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}
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static void
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gst_dirac_parse_init (GstDiracParse * diracparse)
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{
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gst_base_parse_set_min_frame_size (GST_BASE_PARSE (diracparse), 13);
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gst_base_parse_set_pts_interpolation (GST_BASE_PARSE (diracparse), FALSE);
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GST_PAD_SET_ACCEPT_INTERSECT (GST_BASE_PARSE_SINK_PAD (diracparse));
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GST_PAD_SET_ACCEPT_TEMPLATE (GST_BASE_PARSE_SINK_PAD (diracparse));
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}
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void
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gst_dirac_parse_set_property (GObject * object, guint property_id,
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const GValue * value, GParamSpec * pspec)
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{
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g_return_if_fail (GST_IS_DIRAC_PARSE (object));
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switch (property_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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void
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gst_dirac_parse_get_property (GObject * object, guint property_id,
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GValue * value, GParamSpec * pspec)
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{
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g_return_if_fail (GST_IS_DIRAC_PARSE (object));
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switch (property_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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void
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gst_dirac_parse_dispose (GObject * object)
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{
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g_return_if_fail (GST_IS_DIRAC_PARSE (object));
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/* clean up as possible. may be called multiple times */
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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void
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gst_dirac_parse_finalize (GObject * object)
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{
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g_return_if_fail (GST_IS_DIRAC_PARSE (object));
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/* clean up object here */
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static gboolean
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gst_dirac_parse_start (GstBaseParse * parse)
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{
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GstDiracParse *diracparse = GST_DIRAC_PARSE (parse);
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gst_base_parse_set_min_frame_size (parse, 13);
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diracparse->sent_codec_tag = FALSE;
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return TRUE;
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}
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static gboolean
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gst_dirac_parse_stop (GstBaseParse * parse)
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{
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return TRUE;
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}
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static gboolean
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gst_dirac_parse_set_sink_caps (GstBaseParse * parse, GstCaps * caps)
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{
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/* Called when sink caps are set */
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return TRUE;
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}
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static const gchar *
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get_profile_name (int profile)
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{
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switch (profile) {
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case 0:
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return "vc2-low-delay";
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case 1:
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return "vc2-simple";
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case 2:
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return "vc2-main";
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case 8:
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return "main";
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default:
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break;
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}
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return "unknown";
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}
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static const gchar *
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get_level_name (int level)
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{
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switch (level) {
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case 0:
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return "0";
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case 1:
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return "1";
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case 128:
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return "128";
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default:
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break;
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}
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/* need to add it to template caps, so return 0 for now */
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GST_WARNING ("unhandled dirac level %u", level);
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return "0";
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}
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static GstFlowReturn
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gst_dirac_parse_handle_frame (GstBaseParse * parse,
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GstBaseParseFrame * frame, gint * skipsize)
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{
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int off;
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guint32 next_header;
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GstMapInfo map;
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guint8 *data;
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gsize size;
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gboolean have_picture = FALSE;
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int offset;
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guint framesize = 0;
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gst_buffer_map (frame->buffer, &map, GST_MAP_READ);
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data = map.data;
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size = map.size;
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if (G_UNLIKELY (size < 13)) {
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*skipsize = 1;
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goto out;
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}
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GST_DEBUG ("%" G_GSIZE_FORMAT ": %02x %02x %02x %02x", size, data[0], data[1],
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data[2], data[3]);
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if (GST_READ_UINT32_BE (data) != 0x42424344) {
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GstByteReader reader;
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gst_byte_reader_init (&reader, data, size);
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off = gst_byte_reader_masked_scan_uint32 (&reader, 0xffffffff,
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0x42424344, 0, size);
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if (off < 0) {
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*skipsize = size - 3;
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goto out;
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}
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GST_LOG_OBJECT (parse, "possible sync at buffer offset %d", off);
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GST_DEBUG ("skipping %d", off);
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*skipsize = off;
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goto out;
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}
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/* have sync, parse chunks */
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offset = 0;
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while (!have_picture) {
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GST_DEBUG ("offset %d:", offset);
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if (offset + 13 >= size) {
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framesize = offset + 13;
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goto out;
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}
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GST_DEBUG ("chunk type %02x", data[offset + 4]);
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if (GST_READ_UINT32_BE (data + offset) != 0x42424344) {
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GST_DEBUG ("bad header");
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*skipsize = 3;
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goto out;
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}
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next_header = GST_READ_UINT32_BE (data + offset + 5);
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GST_DEBUG ("next_header %d", next_header);
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if (next_header == 0)
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next_header = 13;
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if (SCHRO_PARSE_CODE_IS_PICTURE (data[offset + 4])) {
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have_picture = TRUE;
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}
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offset += next_header;
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if (offset >= size) {
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framesize = offset;
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goto out;
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}
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}
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gst_buffer_unmap (frame->buffer, &map);
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framesize = offset;
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GST_DEBUG ("framesize %d", framesize);
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g_assert (framesize <= size);
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if (data[4] == SCHRO_PARSE_CODE_SEQUENCE_HEADER) {
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GstCaps *caps;
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GstDiracParse *diracparse = GST_DIRAC_PARSE (parse);
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DiracSequenceHeader sequence_header;
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int ret;
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ret = dirac_sequence_header_parse (&sequence_header, data + 13, size - 13);
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if (ret) {
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memcpy (&diracparse->sequence_header, &sequence_header,
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sizeof (sequence_header));
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caps = gst_caps_new_simple ("video/x-dirac",
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"width", G_TYPE_INT, sequence_header.width,
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"height", G_TYPE_INT, sequence_header.height,
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"framerate", GST_TYPE_FRACTION,
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sequence_header.frame_rate_numerator,
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sequence_header.frame_rate_denominator,
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"pixel-aspect-ratio", GST_TYPE_FRACTION,
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sequence_header.aspect_ratio_numerator,
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sequence_header.aspect_ratio_denominator,
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"interlace-mode", G_TYPE_STRING,
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sequence_header.interlaced ? "interleaved" : "progressive",
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"profile", G_TYPE_STRING, get_profile_name (sequence_header.profile),
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"level", G_TYPE_STRING, get_level_name (sequence_header.level), NULL);
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gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (parse), caps);
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gst_caps_unref (caps);
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gst_base_parse_set_frame_rate (parse,
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sequence_header.frame_rate_numerator,
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sequence_header.frame_rate_denominator, 0, 0);
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}
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}
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gst_base_parse_set_min_frame_size (parse, 13);
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return gst_base_parse_finish_frame (parse, frame, framesize);
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out:
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gst_buffer_unmap (frame->buffer, &map);
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if (framesize)
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gst_base_parse_set_min_frame_size (parse, framesize);
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return GST_FLOW_OK;
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}
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static gboolean
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gst_dirac_parse_convert (GstBaseParse * parse, GstFormat src_format,
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gint64 src_value, GstFormat dest_format, gint64 * dest_value)
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{
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/* Convert between formats */
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return FALSE;
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}
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static GstFlowReturn
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gst_dirac_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
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{
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GstDiracParse *diracparse = GST_DIRAC_PARSE (parse);
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if (!diracparse->sent_codec_tag) {
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GstTagList *taglist;
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GstCaps *caps;
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/* codec tag */
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caps = gst_pad_get_current_caps (GST_BASE_PARSE_SRC_PAD (parse));
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if (G_UNLIKELY (caps == NULL)) {
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if (GST_PAD_IS_FLUSHING (GST_BASE_PARSE_SRC_PAD (parse))) {
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GST_INFO_OBJECT (parse, "Src pad is flushing");
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return GST_FLOW_FLUSHING;
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} else {
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GST_INFO_OBJECT (parse, "Src pad is not negotiated!");
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return GST_FLOW_NOT_NEGOTIATED;
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}
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}
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taglist = gst_tag_list_new_empty ();
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gst_pb_utils_add_codec_description_to_tag_list (taglist,
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GST_TAG_VIDEO_CODEC, caps);
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gst_caps_unref (caps);
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gst_base_parse_merge_tags (parse, taglist, GST_TAG_MERGE_REPLACE);
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gst_tag_list_unref (taglist);
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/* also signals the end of first-frame processing */
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diracparse->sent_codec_tag = TRUE;
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}
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return GST_FLOW_OK;
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}
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static void
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remove_fields (GstCaps * caps)
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{
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guint i, n;
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n = gst_caps_get_size (caps);
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for (i = 0; i < n; i++) {
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GstStructure *s = gst_caps_get_structure (caps, i);
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gst_structure_remove_field (s, "parsed");
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}
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}
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static GstCaps *
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gst_dirac_parse_get_sink_caps (GstBaseParse * parse, GstCaps * filter)
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{
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GstCaps *peercaps, *templ;
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GstCaps *res;
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templ = gst_pad_get_pad_template_caps (GST_BASE_PARSE_SINK_PAD (parse));
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if (filter) {
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GstCaps *fcopy = gst_caps_copy (filter);
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/* Remove the fields we convert */
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remove_fields (fcopy);
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peercaps = gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (parse), fcopy);
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gst_caps_unref (fcopy);
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} else
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peercaps = gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (parse), NULL);
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if (peercaps) {
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/* Remove the parsed field */
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peercaps = gst_caps_make_writable (peercaps);
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remove_fields (peercaps);
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res = gst_caps_intersect_full (peercaps, templ, GST_CAPS_INTERSECT_FIRST);
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gst_caps_unref (peercaps);
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gst_caps_unref (templ);
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} else {
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res = templ;
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}
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if (filter) {
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GstCaps *intersection;
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intersection =
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gst_caps_intersect_full (filter, res, GST_CAPS_INTERSECT_FIRST);
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gst_caps_unref (res);
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res = intersection;
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}
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return res;
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}
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