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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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opusparse: add opusparse element
A very simple element that parses Opus streams from the ad hoc framing used by the Opus test vectors.
This commit is contained in:
parent
37e081fc61
commit
a8e4d9bd3e
4 changed files with 220 additions and 2 deletions
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@ -1,6 +1,6 @@
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plugin_LTLIBRARIES = libgstopus.la
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libgstopus_la_SOURCES = gstopus.c gstopusdec.c gstopusenc.c
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libgstopus_la_SOURCES = gstopus.c gstopusdec.c gstopusenc.c gstopusparse.c
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libgstopus_la_CFLAGS = \
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-DGST_USE_UNSTABLE_API \
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$(GST_PLUGINS_BASE_CFLAGS) \
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@ -15,4 +15,4 @@ libgstopus_la_LIBADD = \
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libgstopus_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) $(LIBM)
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libgstopus_la_LIBTOOLFLAGS = --tag=disable-static
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noinst_HEADERS = gstopusenc.h gstopusdec.h
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noinst_HEADERS = gstopusenc.h gstopusdec.h gstopusparse.h
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@ -23,6 +23,7 @@
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#include "gstopusdec.h"
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#include "gstopusenc.h"
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#include "gstopusparse.h"
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#include <gst/tag/tag.h>
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@ -38,6 +39,10 @@ plugin_init (GstPlugin * plugin)
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GST_TYPE_OPUS_DEC))
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return FALSE;
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if (!gst_element_register (plugin, "opusparse", GST_RANK_NONE,
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GST_TYPE_OPUS_PARSE))
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return FALSE;
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gst_tag_register_musicbrainz_tags ();
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return TRUE;
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158
ext/opus/gstopusparse.c
Normal file
158
ext/opus/gstopusparse.c
Normal file
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@ -0,0 +1,158 @@
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/* GStreamer
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* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
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* Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
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* Copyright (C) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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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-opusparse
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* @see_also: opusenc, opusdec
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*
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* This element parses OPUS packets.
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*
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* <refsect2>
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* <title>Example pipelines</title>
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* |[
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* gst-launch -v filesrc location=opusdata ! opusparse ! opusdec ! audioconvert ! audioresample ! alsasink
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* ]| Decode and plays an unmuxed Opus file.
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* </refsect2>
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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 <opus/opus.h>
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#include "gstopusparse.h"
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GST_DEBUG_CATEGORY_STATIC (opusparse_debug);
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#define GST_CAT_DEFAULT opusparse_debug
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#define MAX_PAYLOAD_BYTES 1500
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static GstStaticPadTemplate opus_parse_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 ("audio/x-opus, framed = (boolean) true")
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);
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static GstStaticPadTemplate opus_parse_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 ("audio/x-opus")
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);
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G_DEFINE_TYPE (GstOpusParse, gst_opus_parse, GST_TYPE_BASE_PARSE);
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static gboolean gst_opus_parse_start (GstBaseParse * parse);
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static gboolean gst_opus_parse_check_valid_frame (GstBaseParse * base,
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GstBaseParseFrame * frame, guint * frame_size, gint * skip);
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static void
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gst_opus_parse_class_init (GstOpusParseClass * klass)
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{
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GstBaseParseClass *bpclass;
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GstElementClass *element_class;
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bpclass = (GstBaseParseClass *) klass;
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element_class = (GstElementClass *) klass;
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bpclass->start = GST_DEBUG_FUNCPTR (gst_opus_parse_start);
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bpclass->check_valid_frame =
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GST_DEBUG_FUNCPTR (gst_opus_parse_check_valid_frame);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&opus_parse_src_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&opus_parse_sink_factory));
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gst_element_class_set_details_simple (element_class, "Opus audio parser",
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"Codec/Parser/Audio",
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"parses opus audio streams",
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"Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>");
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GST_DEBUG_CATEGORY_INIT (opusparse_debug, "opusparse", 0,
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"opus parsing element");
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}
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static void
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gst_opus_parse_init (GstOpusParse * parse)
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{
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}
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static gboolean
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gst_opus_parse_start (GstBaseParse * base)
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{
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GstOpusParse *parse = GST_OPUS_PARSE (base);
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GstCaps *caps;
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caps = gst_caps_new_empty_simple ("audio/x-opus");
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gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (GST_BASE_PARSE (parse)), caps);
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gst_caps_unref (caps);
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return TRUE;
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}
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static gboolean
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gst_opus_parse_check_valid_frame (GstBaseParse * base,
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GstBaseParseFrame * frame, guint * frame_size, gint * skip)
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{
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GstOpusParse *parse;
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guint8 *data;
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gsize size;
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guint32 packet_size;
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int ret = FALSE;
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int channels, bandwidth;
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parse = GST_OPUS_PARSE (base);
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data = gst_buffer_map (frame->buffer, &size, NULL, GST_MAP_READ);
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GST_DEBUG_OBJECT (parse, "Checking for frame, %u bytes in buffer", size);
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if (size < 4) {
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GST_DEBUG_OBJECT (parse, "Too small");
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goto beach;
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}
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packet_size = GST_READ_UINT32_BE (data);
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GST_DEBUG_OBJECT (parse, "Packet size: %u bytes", packet_size);
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if (packet_size > MAX_PAYLOAD_BYTES) {
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GST_DEBUG_OBJECT (parse, "Too large");
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goto beach;
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}
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if (packet_size > size - 4) {
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GST_DEBUG_OBJECT (parse, "Truncated");
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goto beach;
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}
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channels = opus_packet_get_nb_channels (data + 8);
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bandwidth = opus_packet_get_bandwidth (data + 8);
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if (channels < 0 || bandwidth < 0) {
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GST_DEBUG_OBJECT (parse, "It looked like a packet, but it is not");
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goto beach;
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}
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GST_DEBUG_OBJECT (parse, "Got Opus packet, %d bytes");
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*skip = 8;
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*frame_size = packet_size;
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ret = TRUE;
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beach:
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gst_buffer_unmap (frame->buffer, data, size);
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return ret;
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}
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55
ext/opus/gstopusparse.h
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55
ext/opus/gstopusparse.h
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/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2008> Sebastian Dröge <sebastian.droege@collabora.co.uk>
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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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#ifndef __GST_OPUS_PARSE_H__
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#define __GST_OPUS_PARSE_H__
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#include <gst/gst.h>
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#include <gst/base/gstbaseparse.h>
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G_BEGIN_DECLS
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#define GST_TYPE_OPUS_PARSE \
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(gst_opus_parse_get_type())
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#define GST_OPUS_PARSE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OPUS_PARSE,GstOpusParse))
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#define GST_OPUS_PARSE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OPUS_PARSE,GstOpusParseClass))
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#define GST_IS_OPUS_PARSE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OPUS_PARSE))
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#define GST_IS_OPUS_PARSE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OPUS_PARSE))
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typedef struct _GstOpusParse GstOpusParse;
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typedef struct _GstOpusParseClass GstOpusParseClass;
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struct _GstOpusParse {
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GstBaseParse element;
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};
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struct _GstOpusParseClass {
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GstBaseParseClass parent_class;
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};
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GType gst_opus_parse_get_type (void);
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G_END_DECLS
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#endif /* __GST_OPUS_PARSE_H__ */
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