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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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With mpeg4videoparse drop=false config-interval=N|-1 we might be trying to insert a config before we have actually received one, in which case we'll try to map a NULL buffer which will generate lots of criticals. Fixes #855 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1265>
1021 lines
32 KiB
C
1021 lines
32 KiB
C
/* GStreamer
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* Copyright (C) <2008> Mindfruit B.V.
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* @author Sjoerd Simons <sjoerd@luon.net>
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* Copyright (C) <2007> Julien Moutte <julien@fluendo.com>
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* Copyright (C) <2011> Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>
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* Copyright (C) <2011> Nokia Corporation
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* Copyright (C) <2011> Intel
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* Copyright (C) <2011> Collabora Ltd.
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* Copyright (C) <2011> Thibault Saunier <thibault.saunier@collabora.com>
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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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <gst/base/base.h>
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#include <gst/pbutils/pbutils.h>
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#include <gst/video/video.h>
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#include "gstvideoparserselements.h"
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#include "gstmpeg4videoparse.h"
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GST_DEBUG_CATEGORY (mpeg4v_parse_debug);
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#define GST_CAT_DEFAULT mpeg4v_parse_debug
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static GstStaticPadTemplate src_template =
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GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/mpeg, "
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"mpegversion = (int) 4, "
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"width = (int)[ 0, max ], "
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"height = (int)[ 0, max ], "
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"framerate = (fraction)[ 0, max ] ,"
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"parsed = (boolean) true, " "systemstream = (boolean) false; "
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"video/x-divx, " "divxversion = (int) [ 4, 5 ]")
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);
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static GstStaticPadTemplate sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/mpeg, "
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"mpegversion = (int) 4, " "systemstream = (boolean) false; "
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"video/x-divx, " "divxversion = (int) [ 4, 5 ]")
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);
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/* Properties */
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#define DEFAULT_PROP_DROP TRUE
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#define DEFAULT_CONFIG_INTERVAL (0)
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enum
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{
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PROP_0,
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PROP_DROP,
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PROP_CONFIG_INTERVAL
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};
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#define gst_mpeg4vparse_parent_class parent_class
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G_DEFINE_TYPE (GstMpeg4VParse, gst_mpeg4vparse, GST_TYPE_BASE_PARSE);
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (mpeg4videoparse, "mpeg4videoparse",
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GST_RANK_PRIMARY + 1, GST_TYPE_MPEG4VIDEO_PARSE,
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videoparsers_element_init (plugin));
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static gboolean gst_mpeg4vparse_start (GstBaseParse * parse);
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static gboolean gst_mpeg4vparse_stop (GstBaseParse * parse);
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static GstFlowReturn gst_mpeg4vparse_handle_frame (GstBaseParse * parse,
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GstBaseParseFrame * frame, gint * skipsize);
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static GstFlowReturn gst_mpeg4vparse_parse_frame (GstBaseParse * parse,
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GstBaseParseFrame * frame);
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static GstFlowReturn gst_mpeg4vparse_pre_push_frame (GstBaseParse * parse,
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GstBaseParseFrame * frame);
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static gboolean gst_mpeg4vparse_set_caps (GstBaseParse * parse, GstCaps * caps);
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static GstCaps *gst_mpeg4vparse_get_caps (GstBaseParse * parse,
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GstCaps * filter);
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static void gst_mpeg4vparse_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_mpeg4vparse_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_mpeg4vparse_event (GstBaseParse * parse, GstEvent * event);
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static gboolean gst_mpeg4vparse_src_event (GstBaseParse * parse,
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GstEvent * event);
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static void
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gst_mpeg4vparse_set_property (GObject * object, guint property_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstMpeg4VParse *parse = GST_MPEG4VIDEO_PARSE (object);
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switch (property_id) {
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case PROP_DROP:
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parse->drop = g_value_get_boolean (value);
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break;
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case PROP_CONFIG_INTERVAL:
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parse->interval = g_value_get_int (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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}
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}
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static void
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gst_mpeg4vparse_get_property (GObject * object, guint property_id,
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GValue * value, GParamSpec * pspec)
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{
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GstMpeg4VParse *parse = GST_MPEG4VIDEO_PARSE (object);
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switch (property_id) {
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case PROP_DROP:
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g_value_set_boolean (value, parse->drop);
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break;
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case PROP_CONFIG_INTERVAL:
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g_value_set_int (value, parse->interval);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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}
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}
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static void
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gst_mpeg4vparse_class_init (GstMpeg4VParseClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstBaseParseClass *parse_class = GST_BASE_PARSE_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->set_property = gst_mpeg4vparse_set_property;
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gobject_class->get_property = gst_mpeg4vparse_get_property;
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g_object_class_install_property (gobject_class, PROP_DROP,
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g_param_spec_boolean ("drop", "drop",
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"Drop data until valid configuration data is received either "
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"in the stream or through caps", DEFAULT_PROP_DROP,
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G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_CONFIG_INTERVAL,
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g_param_spec_int ("config-interval",
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"Configuration Send Interval",
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"Send Configuration Insertion Interval in seconds (configuration headers "
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"will be multiplexed in the data stream when detected.) "
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"(0 = disabled, -1 = send with every IDR frame)",
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-1, 3600, DEFAULT_CONFIG_INTERVAL,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_add_static_pad_template (element_class, &src_template);
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gst_element_class_add_static_pad_template (element_class, &sink_template);
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gst_element_class_set_static_metadata (element_class,
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"MPEG 4 video elementary stream parser", "Codec/Parser/Video",
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"Parses MPEG-4 Part 2 elementary video streams",
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"Julien Moutte <julien@fluendo.com>");
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GST_DEBUG_CATEGORY_INIT (mpeg4v_parse_debug, "mpeg4videoparse", 0,
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"MPEG-4 video parser");
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/* Override BaseParse vfuncs */
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parse_class->start = GST_DEBUG_FUNCPTR (gst_mpeg4vparse_start);
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parse_class->stop = GST_DEBUG_FUNCPTR (gst_mpeg4vparse_stop);
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parse_class->handle_frame = GST_DEBUG_FUNCPTR (gst_mpeg4vparse_handle_frame);
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parse_class->pre_push_frame =
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GST_DEBUG_FUNCPTR (gst_mpeg4vparse_pre_push_frame);
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parse_class->set_sink_caps = GST_DEBUG_FUNCPTR (gst_mpeg4vparse_set_caps);
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parse_class->get_sink_caps = GST_DEBUG_FUNCPTR (gst_mpeg4vparse_get_caps);
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parse_class->sink_event = GST_DEBUG_FUNCPTR (gst_mpeg4vparse_event);
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parse_class->src_event = GST_DEBUG_FUNCPTR (gst_mpeg4vparse_src_event);
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}
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static void
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gst_mpeg4vparse_init (GstMpeg4VParse * parse)
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{
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parse->interval = DEFAULT_CONFIG_INTERVAL;
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parse->last_report = GST_CLOCK_TIME_NONE;
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gst_base_parse_set_pts_interpolation (GST_BASE_PARSE (parse), FALSE);
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gst_base_parse_set_infer_ts (GST_BASE_PARSE (parse), FALSE);
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GST_PAD_SET_ACCEPT_INTERSECT (GST_BASE_PARSE_SINK_PAD (parse));
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GST_PAD_SET_ACCEPT_TEMPLATE (GST_BASE_PARSE_SINK_PAD (parse));
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}
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static void
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gst_mpeg4vparse_reset_frame (GstMpeg4VParse * mp4vparse)
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{
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/* done parsing; reset state */
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mp4vparse->last_sc = -1;
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mp4vparse->vop_offset = -1;
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mp4vparse->vo_found = FALSE;
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mp4vparse->config_found = FALSE;
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mp4vparse->vol_offset = -1;
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mp4vparse->vo_offset = -1;
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}
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static void
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gst_mpeg4vparse_reset (GstMpeg4VParse * mp4vparse)
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{
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gst_mpeg4vparse_reset_frame (mp4vparse);
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mp4vparse->update_caps = TRUE;
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mp4vparse->profile = NULL;
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mp4vparse->level = NULL;
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mp4vparse->pending_key_unit_ts = GST_CLOCK_TIME_NONE;
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mp4vparse->force_key_unit_event = NULL;
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mp4vparse->discont = FALSE;
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gst_buffer_replace (&mp4vparse->config, NULL);
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memset (&mp4vparse->vol, 0, sizeof (mp4vparse->vol));
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}
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static gboolean
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gst_mpeg4vparse_start (GstBaseParse * parse)
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{
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GstMpeg4VParse *mp4vparse = GST_MPEG4VIDEO_PARSE (parse);
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GST_DEBUG_OBJECT (parse, "start");
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gst_mpeg4vparse_reset (mp4vparse);
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/* at least this much for a valid frame */
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gst_base_parse_set_min_frame_size (parse, 6);
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return TRUE;
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}
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static gboolean
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gst_mpeg4vparse_stop (GstBaseParse * parse)
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{
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GstMpeg4VParse *mp4vparse = GST_MPEG4VIDEO_PARSE (parse);
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GST_DEBUG_OBJECT (parse, "stop");
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gst_mpeg4vparse_reset (mp4vparse);
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return TRUE;
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}
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static gboolean
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gst_mpeg4vparse_process_config (GstMpeg4VParse * mp4vparse,
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const guint8 * data, guint offset, gsize size)
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{
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GstMpeg4VisualObject *vo;
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GstMpeg4VideoObjectLayer vol = { 0 };
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/* only do stuff if something new */
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if (mp4vparse->config
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&& gst_buffer_get_size (mp4vparse->config) == size
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&& !gst_buffer_memcmp (mp4vparse->config, offset, data, size))
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return TRUE;
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if (mp4vparse->vol_offset < 0) {
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GST_WARNING ("No video object Layer parsed in this frame, cannot accept "
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"config");
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return FALSE;
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}
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vo = mp4vparse->vo_found ? &mp4vparse->vo : NULL;
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/* If the parsing fail, we accept the config only if we don't have
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* any config yet. */
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if (gst_mpeg4_parse_video_object_layer (&vol,
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vo, data + mp4vparse->vol_offset,
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size - mp4vparse->vol_offset) != GST_MPEG4_PARSER_OK &&
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mp4vparse->config)
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return FALSE;
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/* ignore update if nothing meaningful changed */
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if (vol.height == mp4vparse->vol.height &&
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vol.width == mp4vparse->vol.width &&
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vol.vop_time_increment_resolution ==
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mp4vparse->vol.vop_time_increment_resolution &&
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vol.fixed_vop_time_increment == mp4vparse->vol.fixed_vop_time_increment &&
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vol.par_width == mp4vparse->vol.par_width &&
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vol.par_height == mp4vparse->vol.par_height &&
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vol.sprite_enable == mp4vparse->vol.sprite_enable &&
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vol.no_of_sprite_warping_points ==
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mp4vparse->vol.no_of_sprite_warping_points)
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return TRUE;
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mp4vparse->vol = vol;
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GST_LOG_OBJECT (mp4vparse, "Width/Height: %u/%u, "
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"time increment resolution: %u fixed time increment: %u",
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mp4vparse->vol.width, mp4vparse->vol.height,
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mp4vparse->vol.vop_time_increment_resolution,
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mp4vparse->vol.fixed_vop_time_increment);
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GST_LOG_OBJECT (mp4vparse, "accepting parsed config size %" G_GSIZE_FORMAT,
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size);
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if (mp4vparse->config != NULL)
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gst_buffer_unref (mp4vparse->config);
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mp4vparse->config = gst_buffer_new_memdup (data, size);
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/* trigger src caps update */
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mp4vparse->update_caps = TRUE;
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return TRUE;
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}
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/* caller guarantees at least start code in @buf at @off */
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static gboolean
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gst_mpeg4vparse_process_sc (GstMpeg4VParse * mp4vparse, GstMpeg4Packet * packet,
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gsize size)
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{
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GST_LOG_OBJECT (mp4vparse, "process startcode %x", packet->type);
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/* if we found a VOP, next start code ends it,
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* except for final VOS end sequence code included in last VOP-frame */
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if (mp4vparse->vop_offset >= 0 &&
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packet->type != GST_MPEG4_VISUAL_OBJ_SEQ_END) {
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GST_LOG_OBJECT (mp4vparse, "ending frame of size %d", packet->offset - 3);
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return TRUE;
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}
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if (mp4vparse->vo_offset >= 0) {
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gst_mpeg4_parse_visual_object (&mp4vparse->vo, NULL,
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packet->data + mp4vparse->vo_offset,
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packet->offset - 3 - mp4vparse->vo_offset);
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mp4vparse->vo_offset = -1;
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mp4vparse->vo_found = TRUE;
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}
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switch (packet->type) {
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case GST_MPEG4_VIDEO_OBJ_PLANE:
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case GST_MPEG4_GROUP_OF_VOP:
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case GST_MPEG4_USER_DATA:
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{
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if (packet->type == GST_MPEG4_VIDEO_OBJ_PLANE) {
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GST_LOG_OBJECT (mp4vparse, "startcode is VOP");
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mp4vparse->vop_offset = packet->offset;
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} else if (packet->type == GST_MPEG4_GROUP_OF_VOP) {
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GST_LOG_OBJECT (mp4vparse, "startcode is GOP");
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} else {
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GST_LOG_OBJECT (mp4vparse, "startcode is User Data");
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}
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/* parse config data ending here if proper startcodes found earlier;
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* we should have received a visual object before. */
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if (mp4vparse->config_found) {
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/*Do not take care startcode into account */
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gst_mpeg4vparse_process_config (mp4vparse,
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packet->data, packet->offset, packet->offset - 3);
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mp4vparse->vo_found = FALSE;
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}
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break;
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}
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case GST_MPEG4_VISUAL_OBJ_SEQ_START:
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GST_LOG_OBJECT (mp4vparse, "Visual Sequence Start");
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mp4vparse->config_found = TRUE;
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mp4vparse->profile = gst_codec_utils_mpeg4video_get_profile (packet->data
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+ packet->offset + 1, packet->offset);
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mp4vparse->level = gst_codec_utils_mpeg4video_get_level (packet->data
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+ packet->offset + 1, packet->offset);
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break;
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case GST_MPEG4_VISUAL_OBJ:
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GST_LOG_OBJECT (mp4vparse, "Visual Object");
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mp4vparse->vo_offset = packet->offset;
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break;
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default:
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if (packet->type >= GST_MPEG4_VIDEO_LAYER_FIRST &&
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packet->type <= GST_MPEG4_VIDEO_LAYER_LAST) {
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GST_LOG_OBJECT (mp4vparse, "Video Object Layer");
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/* we keep track of the offset to parse later on */
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if (mp4vparse->vol_offset < 0)
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mp4vparse->vol_offset = packet->offset;
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/* Video Object below is merely a start code,
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* if that is considered as config, then certainly Video Object Layer
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* which really contains some needed data */
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mp4vparse->config_found = TRUE;
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/* VO (video object) cases */
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} else if (packet->type <= GST_MPEG4_VIDEO_OBJ_LAST) {
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GST_LOG_OBJECT (mp4vparse, "Video object");
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mp4vparse->config_found = TRUE;
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}
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break;
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}
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/* at least need to have a VOP in a frame */
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return FALSE;
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}
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static GstFlowReturn
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gst_mpeg4vparse_handle_frame (GstBaseParse * parse,
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GstBaseParseFrame * frame, gint * skipsize)
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{
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GstMpeg4VParse *mp4vparse = GST_MPEG4VIDEO_PARSE (parse);
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GstMpeg4Packet packet;
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GstMapInfo map;
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guint8 *data = NULL;
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gsize size;
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gint off = 0;
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gboolean ret = FALSE;
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guint framesize = 0;
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if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (frame->buffer,
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GST_BUFFER_FLAG_DISCONT))) {
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mp4vparse->discont = TRUE;
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}
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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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retry:
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/* at least start code and subsequent byte */
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if (G_UNLIKELY (size - off < 5)) {
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*skipsize = 1;
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goto out;
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}
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/* avoid stale cached parsing state */
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if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME) {
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GST_LOG_OBJECT (mp4vparse, "parsing new frame");
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gst_mpeg4vparse_reset_frame (mp4vparse);
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} else {
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GST_LOG_OBJECT (mp4vparse, "resuming frame parsing");
|
|
}
|
|
|
|
/* if already found a previous start code, e.g. start of frame, go for next */
|
|
if (mp4vparse->last_sc >= 0) {
|
|
off = mp4vparse->last_sc;
|
|
goto next;
|
|
}
|
|
|
|
/* didn't find anything that looks like a sync word, skip */
|
|
switch (gst_mpeg4_parse (&packet, FALSE, NULL, data, off, size)) {
|
|
case (GST_MPEG4_PARSER_NO_PACKET):
|
|
case (GST_MPEG4_PARSER_ERROR):
|
|
*skipsize = size - 3;
|
|
goto out;
|
|
default:
|
|
break;
|
|
}
|
|
off = packet.offset;
|
|
|
|
/* possible frame header, but not at offset 0? skip bytes before sync */
|
|
if (G_UNLIKELY (off > 3)) {
|
|
*skipsize = off - 3;
|
|
goto out;
|
|
}
|
|
|
|
switch (packet.type) {
|
|
case GST_MPEG4_GROUP_OF_VOP:
|
|
case GST_MPEG4_VISUAL_OBJ_SEQ_START:
|
|
case GST_MPEG4_VIDEO_OBJ_PLANE:
|
|
break;
|
|
default:
|
|
if (packet.type <= GST_MPEG4_VIDEO_OBJ_LAST)
|
|
break;
|
|
if (packet.type >= GST_MPEG4_VIDEO_LAYER_FIRST &&
|
|
packet.type <= GST_MPEG4_VIDEO_LAYER_LAST)
|
|
break;
|
|
/* undesirable sc */
|
|
GST_LOG_OBJECT (mp4vparse, "start code is no VOS, VO, VOL, VOP or GOP");
|
|
goto retry;
|
|
}
|
|
|
|
/* found sc */
|
|
mp4vparse->last_sc = 0;
|
|
|
|
/* examine start code, which should not end frame at present */
|
|
gst_mpeg4vparse_process_sc (mp4vparse, &packet, size);
|
|
|
|
next:
|
|
GST_LOG_OBJECT (mp4vparse, "Looking for frame end");
|
|
|
|
/* start is fine as of now */
|
|
*skipsize = 0;
|
|
/* position a bit further than last sc */
|
|
off++;
|
|
|
|
/* so now we have start code at start of data; locate next packet */
|
|
switch (gst_mpeg4_parse (&packet, FALSE, NULL, data, off, size)) {
|
|
case (GST_MPEG4_PARSER_NO_PACKET_END):
|
|
ret = gst_mpeg4vparse_process_sc (mp4vparse, &packet, size);
|
|
if (ret)
|
|
break;
|
|
case (GST_MPEG4_PARSER_NO_PACKET):
|
|
case (GST_MPEG4_PARSER_ERROR):
|
|
/* if draining, take all */
|
|
if (GST_BASE_PARSE_DRAINING (parse)) {
|
|
framesize = size;
|
|
ret = TRUE;
|
|
} else {
|
|
/* resume scan where we left it */
|
|
mp4vparse->last_sc = size - 3;
|
|
}
|
|
goto out;
|
|
default:
|
|
/* decide whether this startcode ends a frame */
|
|
ret = gst_mpeg4vparse_process_sc (mp4vparse, &packet, size);
|
|
break;
|
|
}
|
|
|
|
off = packet.offset;
|
|
|
|
if (ret) {
|
|
framesize = off - 3;
|
|
} else {
|
|
goto next;
|
|
}
|
|
|
|
out:
|
|
gst_buffer_unmap (frame->buffer, &map);
|
|
|
|
if (ret) {
|
|
GstFlowReturn res;
|
|
|
|
g_assert (framesize <= map.size);
|
|
res = gst_mpeg4vparse_parse_frame (parse, frame);
|
|
if (res == GST_BASE_PARSE_FLOW_DROPPED)
|
|
frame->flags |= GST_BASE_PARSE_FRAME_FLAG_DROP;
|
|
if (G_UNLIKELY (mp4vparse->discont)) {
|
|
GST_BUFFER_FLAG_SET (frame->buffer, GST_BUFFER_FLAG_DISCONT);
|
|
mp4vparse->discont = FALSE;
|
|
}
|
|
return gst_base_parse_finish_frame (parse, frame, framesize);
|
|
}
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static void
|
|
gst_mpeg4vparse_update_src_caps (GstMpeg4VParse * mp4vparse)
|
|
{
|
|
GstCaps *caps = NULL;
|
|
GstStructure *s = NULL;
|
|
|
|
/* only update if no src caps yet or explicitly triggered */
|
|
if (G_LIKELY (gst_pad_has_current_caps (GST_BASE_PARSE_SRC_PAD (mp4vparse)) &&
|
|
!mp4vparse->update_caps))
|
|
return;
|
|
|
|
GST_LOG_OBJECT (mp4vparse, "Updating caps");
|
|
|
|
/* carry over input caps as much as possible; override with our own stuff */
|
|
caps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (mp4vparse));
|
|
if (caps) {
|
|
GstCaps *tmp = gst_caps_copy (caps);
|
|
gst_caps_unref (caps);
|
|
caps = tmp;
|
|
s = gst_caps_get_structure (caps, 0);
|
|
} else {
|
|
caps = gst_caps_new_simple ("video/mpeg",
|
|
"mpegversion", G_TYPE_INT, 4,
|
|
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
|
|
}
|
|
|
|
gst_caps_set_simple (caps, "parsed", G_TYPE_BOOLEAN, TRUE, NULL);
|
|
|
|
if (mp4vparse->profile && mp4vparse->level) {
|
|
gst_caps_set_simple (caps, "profile", G_TYPE_STRING, mp4vparse->profile,
|
|
"level", G_TYPE_STRING, mp4vparse->level, NULL);
|
|
}
|
|
|
|
if (mp4vparse->config != NULL) {
|
|
gst_caps_set_simple (caps, "codec_data",
|
|
GST_TYPE_BUFFER, mp4vparse->config, NULL);
|
|
}
|
|
|
|
if (mp4vparse->vol.width > 0 && mp4vparse->vol.height > 0) {
|
|
gst_caps_set_simple (caps, "width", G_TYPE_INT, mp4vparse->vol.width,
|
|
"height", G_TYPE_INT, mp4vparse->vol.height, NULL);
|
|
}
|
|
|
|
/* perhaps we have a framerate */
|
|
{
|
|
gint fps_num = mp4vparse->vol.vop_time_increment_resolution;
|
|
gint fps_den = mp4vparse->vol.fixed_vop_time_increment;
|
|
GstClockTime latency;
|
|
|
|
/* upstream overrides */
|
|
if (s && gst_structure_has_field (s, "framerate"))
|
|
gst_structure_get_fraction (s, "framerate", &fps_num, &fps_den);
|
|
|
|
if (fps_den > 0 && fps_num > 0) {
|
|
gst_caps_set_simple (caps, "framerate",
|
|
GST_TYPE_FRACTION, fps_num, fps_den, NULL);
|
|
gst_base_parse_set_frame_rate (GST_BASE_PARSE (mp4vparse),
|
|
fps_num, fps_den, 0, 0);
|
|
latency = gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
|
|
gst_base_parse_set_latency (GST_BASE_PARSE (mp4vparse), latency, latency);
|
|
}
|
|
}
|
|
|
|
/* or pixel-aspect-ratio */
|
|
if (mp4vparse->vol.par_width > 0 && mp4vparse->vol.par_height > 0 &&
|
|
(!s || !gst_structure_has_field (s, "pixel-aspect-ratio"))) {
|
|
gst_caps_set_simple (caps, "pixel-aspect-ratio",
|
|
GST_TYPE_FRACTION, mp4vparse->vol.par_width,
|
|
mp4vparse->vol.par_height, NULL);
|
|
}
|
|
|
|
if (mp4vparse->vol.sprite_enable != GST_MPEG4_SPRITE_UNUSED)
|
|
gst_caps_set_simple (caps, "sprite-warping-points", G_TYPE_INT,
|
|
mp4vparse->vol.no_of_sprite_warping_points, NULL);
|
|
|
|
gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (mp4vparse), caps);
|
|
gst_caps_unref (caps);
|
|
|
|
mp4vparse->update_caps = FALSE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_mpeg4vparse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
|
|
{
|
|
GstMpeg4VParse *mp4vparse = GST_MPEG4VIDEO_PARSE (parse);
|
|
GstBuffer *buffer = frame->buffer;
|
|
GstMapInfo map;
|
|
gboolean intra = FALSE;
|
|
|
|
gst_mpeg4vparse_update_src_caps (mp4vparse);
|
|
|
|
/* let's live up to our function name and really parse something here
|
|
* (which ensures it is done for all frames, whether drained or not);
|
|
* determine intra frame */
|
|
gst_buffer_map (frame->buffer, &map, GST_MAP_READ);
|
|
if (G_LIKELY (map.size > mp4vparse->vop_offset + 1)) {
|
|
intra = ((map.data[mp4vparse->vop_offset + 1] >> 6 & 0x3) == 0);
|
|
GST_DEBUG_OBJECT (mp4vparse, "frame intra = %d", intra);
|
|
} else {
|
|
GST_WARNING_OBJECT (mp4vparse, "no data following VOP startcode");
|
|
}
|
|
gst_buffer_unmap (frame->buffer, &map);
|
|
|
|
if (intra)
|
|
GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
|
|
else
|
|
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
|
|
|
|
if (G_UNLIKELY (mp4vparse->drop && !mp4vparse->config)) {
|
|
GST_LOG_OBJECT (mp4vparse, "dropping frame as no config yet");
|
|
return GST_BASE_PARSE_FLOW_DROPPED;
|
|
} else
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static GstEvent *
|
|
check_pending_key_unit_event (GstEvent * pending_event, GstSegment * segment,
|
|
GstClockTime timestamp, guint flags, GstClockTime pending_key_unit_ts)
|
|
{
|
|
GstClockTime running_time, stream_time;
|
|
gboolean all_headers;
|
|
guint count;
|
|
GstEvent *event = NULL;
|
|
|
|
g_return_val_if_fail (segment != NULL, NULL);
|
|
|
|
if (pending_event == NULL)
|
|
goto out;
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (pending_key_unit_ts) &&
|
|
timestamp == GST_CLOCK_TIME_NONE)
|
|
goto out;
|
|
|
|
running_time = gst_segment_to_running_time (segment,
|
|
GST_FORMAT_TIME, timestamp);
|
|
|
|
GST_INFO ("now %" GST_TIME_FORMAT " wanted %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (running_time), GST_TIME_ARGS (pending_key_unit_ts));
|
|
if (GST_CLOCK_TIME_IS_VALID (pending_key_unit_ts) &&
|
|
running_time < pending_key_unit_ts)
|
|
goto out;
|
|
|
|
if (flags & GST_BUFFER_FLAG_DELTA_UNIT) {
|
|
GST_DEBUG ("pending force key unit, waiting for keyframe");
|
|
goto out;
|
|
}
|
|
|
|
stream_time = gst_segment_to_stream_time (segment,
|
|
GST_FORMAT_TIME, timestamp);
|
|
|
|
gst_video_event_parse_upstream_force_key_unit (pending_event,
|
|
NULL, &all_headers, &count);
|
|
|
|
event =
|
|
gst_video_event_new_downstream_force_key_unit (timestamp, stream_time,
|
|
running_time, all_headers, count);
|
|
gst_event_set_seqnum (event, gst_event_get_seqnum (pending_event));
|
|
|
|
out:
|
|
return event;
|
|
}
|
|
|
|
static void
|
|
gst_mpeg4vparse_prepare_key_unit (GstMpeg4VParse * parse, GstEvent * event)
|
|
{
|
|
GstClockTime running_time;
|
|
guint count;
|
|
|
|
parse->pending_key_unit_ts = GST_CLOCK_TIME_NONE;
|
|
gst_event_replace (&parse->force_key_unit_event, NULL);
|
|
|
|
gst_video_event_parse_downstream_force_key_unit (event,
|
|
NULL, NULL, &running_time, NULL, &count);
|
|
|
|
GST_INFO_OBJECT (parse, "pushing downstream force-key-unit event %d "
|
|
"%" GST_TIME_FORMAT " count %d", gst_event_get_seqnum (event),
|
|
GST_TIME_ARGS (running_time), count);
|
|
gst_pad_push_event (GST_BASE_PARSE_SRC_PAD (parse), event);
|
|
}
|
|
|
|
|
|
static GstFlowReturn
|
|
gst_mpeg4vparse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
|
|
{
|
|
GstMpeg4VParse *mp4vparse = GST_MPEG4VIDEO_PARSE (parse);
|
|
GstBuffer *buffer = frame->buffer;
|
|
gboolean push_codec = FALSE;
|
|
GstEvent *event = NULL;
|
|
|
|
if (!mp4vparse->sent_codec_tag) {
|
|
GstTagList *taglist;
|
|
GstCaps *caps;
|
|
|
|
/* codec tag */
|
|
caps = gst_pad_get_current_caps (GST_BASE_PARSE_SRC_PAD (parse));
|
|
if (G_UNLIKELY (caps == NULL)) {
|
|
if (GST_PAD_IS_FLUSHING (GST_BASE_PARSE_SRC_PAD (parse))) {
|
|
GST_INFO_OBJECT (parse, "Src pad is flushing");
|
|
return GST_FLOW_FLUSHING;
|
|
} else {
|
|
GST_INFO_OBJECT (parse, "Src pad is not negotiated!");
|
|
return GST_FLOW_NOT_NEGOTIATED;
|
|
}
|
|
}
|
|
|
|
taglist = gst_tag_list_new_empty ();
|
|
gst_pb_utils_add_codec_description_to_tag_list (taglist,
|
|
GST_TAG_VIDEO_CODEC, caps);
|
|
gst_caps_unref (caps);
|
|
|
|
gst_base_parse_merge_tags (parse, taglist, GST_TAG_MERGE_REPLACE);
|
|
gst_tag_list_unref (taglist);
|
|
|
|
/* also signals the end of first-frame processing */
|
|
mp4vparse->sent_codec_tag = TRUE;
|
|
}
|
|
|
|
if ((event = check_pending_key_unit_event (mp4vparse->force_key_unit_event,
|
|
&parse->segment, GST_BUFFER_TIMESTAMP (buffer),
|
|
GST_BUFFER_FLAGS (buffer), mp4vparse->pending_key_unit_ts))) {
|
|
gst_mpeg4vparse_prepare_key_unit (mp4vparse, event);
|
|
push_codec = TRUE;
|
|
}
|
|
|
|
if (mp4vparse->interval == -1) {
|
|
push_codec = TRUE;
|
|
}
|
|
|
|
/* periodic config sending */
|
|
if (mp4vparse->interval > 0 || push_codec) {
|
|
GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buffer);
|
|
guint64 diff;
|
|
|
|
/* init */
|
|
if (!GST_CLOCK_TIME_IS_VALID (mp4vparse->last_report)) {
|
|
mp4vparse->last_report = timestamp;
|
|
}
|
|
|
|
if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT)) {
|
|
if (timestamp > mp4vparse->last_report)
|
|
diff = timestamp - mp4vparse->last_report;
|
|
else
|
|
diff = 0;
|
|
|
|
GST_LOG_OBJECT (mp4vparse,
|
|
"now %" GST_TIME_FORMAT ", last config %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (timestamp), GST_TIME_ARGS (mp4vparse->last_report));
|
|
|
|
GST_LOG_OBJECT (mp4vparse,
|
|
"interval since last config %" GST_TIME_FORMAT, GST_TIME_ARGS (diff));
|
|
|
|
if (GST_TIME_AS_SECONDS (diff) >= mp4vparse->interval || push_codec) {
|
|
GstMapInfo cmap;
|
|
gsize csize;
|
|
gboolean diffconf;
|
|
|
|
/* we need to send config now first */
|
|
GST_INFO_OBJECT (parse, "inserting config in stream");
|
|
if (mp4vparse->config != NULL
|
|
&& gst_buffer_map (mp4vparse->config, &cmap, GST_MAP_READ)) {
|
|
diffconf = (gst_buffer_get_size (buffer) < cmap.size)
|
|
|| gst_buffer_memcmp (buffer, 0, cmap.data, cmap.size);
|
|
csize = cmap.size;
|
|
gst_buffer_unmap (mp4vparse->config, &cmap);
|
|
|
|
/* avoid inserting duplicate config */
|
|
if (diffconf) {
|
|
GstBuffer *superbuf;
|
|
|
|
/* insert header */
|
|
superbuf =
|
|
gst_buffer_append (gst_buffer_ref (mp4vparse->config),
|
|
gst_buffer_ref (buffer));
|
|
gst_buffer_copy_into (superbuf, buffer, GST_BUFFER_COPY_METADATA, 0,
|
|
csize);
|
|
gst_buffer_replace (&frame->out_buffer, superbuf);
|
|
gst_buffer_unref (superbuf);
|
|
} else {
|
|
GST_INFO_OBJECT (parse, "... but avoiding duplication");
|
|
}
|
|
} else {
|
|
GST_WARNING_OBJECT (parse, "No config received yet");
|
|
}
|
|
|
|
if (G_UNLIKELY (timestamp != -1)) {
|
|
mp4vparse->last_report = timestamp;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static gboolean
|
|
gst_mpeg4vparse_set_caps (GstBaseParse * parse, GstCaps * caps)
|
|
{
|
|
GstMpeg4VParse *mp4vparse = GST_MPEG4VIDEO_PARSE (parse);
|
|
GstStructure *s;
|
|
const GValue *value;
|
|
GstBuffer *buf;
|
|
GstMapInfo map;
|
|
guint8 *data;
|
|
gsize size;
|
|
|
|
GstMpeg4Packet packet;
|
|
GstMpeg4ParseResult res;
|
|
|
|
GST_DEBUG_OBJECT (parse, "setcaps called with %" GST_PTR_FORMAT, caps);
|
|
|
|
s = gst_caps_get_structure (caps, 0);
|
|
|
|
if ((value = gst_structure_get_value (s, "codec_data")) != NULL
|
|
&& (buf = gst_value_get_buffer (value))) {
|
|
/* best possible parse attempt,
|
|
* src caps are based on sink caps so it will end up in there
|
|
* whether successful or not */
|
|
gst_buffer_map (buf, &map, GST_MAP_READ);
|
|
data = map.data;
|
|
size = map.size;
|
|
res = gst_mpeg4_parse (&packet, FALSE, NULL, data, 0, size);
|
|
|
|
while (res == GST_MPEG4_PARSER_OK || res == GST_MPEG4_PARSER_NO_PACKET_END) {
|
|
|
|
if (packet.type >= GST_MPEG4_VIDEO_LAYER_FIRST &&
|
|
packet.type <= GST_MPEG4_VIDEO_LAYER_LAST)
|
|
mp4vparse->vol_offset = packet.offset;
|
|
|
|
else if (packet.type == GST_MPEG4_VISUAL_OBJ) {
|
|
gst_mpeg4_parse_visual_object (&mp4vparse->vo, NULL,
|
|
data + packet.offset, MIN (packet.size, size));
|
|
mp4vparse->vo_found = TRUE;
|
|
}
|
|
|
|
res = gst_mpeg4_parse (&packet, FALSE, NULL, data, packet.offset, size);
|
|
}
|
|
|
|
/* And take it as config */
|
|
gst_mpeg4vparse_process_config (mp4vparse, data, 3, size);
|
|
gst_buffer_unmap (buf, &map);
|
|
gst_mpeg4vparse_reset_frame (mp4vparse);
|
|
}
|
|
|
|
/* let's not interfere and accept regardless of config parsing success */
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
remove_fields (GstCaps * caps)
|
|
{
|
|
guint i, n;
|
|
|
|
n = gst_caps_get_size (caps);
|
|
for (i = 0; i < n; i++) {
|
|
GstStructure *s = gst_caps_get_structure (caps, i);
|
|
|
|
gst_structure_remove_field (s, "parsed");
|
|
}
|
|
}
|
|
|
|
|
|
static GstCaps *
|
|
gst_mpeg4vparse_get_caps (GstBaseParse * parse, GstCaps * filter)
|
|
{
|
|
GstCaps *peercaps, *templ;
|
|
GstCaps *res;
|
|
|
|
templ = gst_pad_get_pad_template_caps (GST_BASE_PARSE_SINK_PAD (parse));
|
|
if (filter) {
|
|
GstCaps *fcopy = gst_caps_copy (filter);
|
|
/* Remove the fields we convert */
|
|
remove_fields (fcopy);
|
|
peercaps = gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (parse), fcopy);
|
|
gst_caps_unref (fcopy);
|
|
} else
|
|
peercaps = gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (parse), NULL);
|
|
|
|
if (peercaps) {
|
|
/* Remove the parsed field */
|
|
peercaps = gst_caps_make_writable (peercaps);
|
|
remove_fields (peercaps);
|
|
|
|
res = gst_caps_intersect_full (peercaps, templ, GST_CAPS_INTERSECT_FIRST);
|
|
gst_caps_unref (peercaps);
|
|
gst_caps_unref (templ);
|
|
} else {
|
|
res = templ;
|
|
}
|
|
|
|
if (filter) {
|
|
GstCaps *tmp = gst_caps_intersect_full (res, filter,
|
|
GST_CAPS_INTERSECT_FIRST);
|
|
gst_caps_unref (res);
|
|
res = tmp;
|
|
}
|
|
|
|
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
gst_mpeg4vparse_event (GstBaseParse * parse, GstEvent * event)
|
|
{
|
|
gboolean res;
|
|
GstMpeg4VParse *mp4vparse = GST_MPEG4VIDEO_PARSE (parse);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_CUSTOM_DOWNSTREAM:
|
|
{
|
|
GstClockTime timestamp, stream_time, running_time;
|
|
gboolean all_headers;
|
|
guint count;
|
|
|
|
if (gst_video_event_is_force_key_unit (event)) {
|
|
gst_video_event_parse_downstream_force_key_unit (event,
|
|
×tamp, &stream_time, &running_time, &all_headers, &count);
|
|
|
|
GST_INFO_OBJECT (mp4vparse, "received downstream force key unit event, "
|
|
"seqnum %d running_time %" GST_TIME_FORMAT
|
|
" all_headers %d count %d", gst_event_get_seqnum (event),
|
|
GST_TIME_ARGS (running_time), all_headers, count);
|
|
|
|
if (mp4vparse->force_key_unit_event) {
|
|
GST_INFO_OBJECT (mp4vparse, "ignoring force key unit event "
|
|
"as one is already queued");
|
|
} else {
|
|
mp4vparse->pending_key_unit_ts = running_time;
|
|
gst_event_replace (&mp4vparse->force_key_unit_event, event);
|
|
}
|
|
gst_event_unref (event);
|
|
res = TRUE;
|
|
} else {
|
|
res = GST_BASE_PARSE_CLASS (parent_class)->sink_event (parse, event);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
res = GST_BASE_PARSE_CLASS (parent_class)->sink_event (parse, event);
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
gst_mpeg4vparse_src_event (GstBaseParse * parse, GstEvent * event)
|
|
{
|
|
gboolean res;
|
|
GstMpeg4VParse *mp4vparse = GST_MPEG4VIDEO_PARSE (parse);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_CUSTOM_UPSTREAM:
|
|
{
|
|
GstClockTime running_time;
|
|
gboolean all_headers;
|
|
guint count;
|
|
|
|
if (gst_video_event_is_force_key_unit (event)) {
|
|
gst_video_event_parse_upstream_force_key_unit (event,
|
|
&running_time, &all_headers, &count);
|
|
|
|
GST_INFO_OBJECT (mp4vparse, "received upstream force-key-unit event, "
|
|
"seqnum %d running_time %" GST_TIME_FORMAT
|
|
" all_headers %d count %d", gst_event_get_seqnum (event),
|
|
GST_TIME_ARGS (running_time), all_headers, count);
|
|
|
|
if (all_headers) {
|
|
mp4vparse->pending_key_unit_ts = running_time;
|
|
gst_event_replace (&mp4vparse->force_key_unit_event, event);
|
|
}
|
|
}
|
|
res = GST_BASE_PARSE_CLASS (parent_class)->src_event (parse, event);
|
|
break;
|
|
}
|
|
default:
|
|
res = GST_BASE_PARSE_CLASS (parent_class)->src_event (parse, event);
|
|
break;
|
|
}
|
|
|
|
return res;
|
|
}
|