gstreamer/gst/matroska/webm-mux.c
2012-04-10 00:51:41 +01:00

99 lines
3.5 KiB
C

/* GStreamer WebM muxer
* Copyright (c) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-webmmux
*
* webmmux muxes VP8 video and Vorbis audio streams into a WebM file.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-0.10 webmmux name=mux ! filesink location=newfile.webm \
* uridecodebin uri=file:///path/to/somefile.ogv name=demux \
* demux. ! ffmpegcolorspace ! vp8enc ! queue ! mux.video_0 \
* demux. ! progressreport ! audioconvert ! audiorate ! vorbisenc ! queue ! mux.audio_0
* ]| This pipeline re-encodes a video file of any format into a WebM file.
* |[
* gst-launch-0.10 webmmux name=mux ! filesink location=test.webm \
* videotestsrc num-buffers=250 ! video/x-raw,framerate=25/1 ! ffmpegcolorspace ! vp8enc ! queue ! mux.video_0 \
* audiotestsrc samplesperbuffer=44100 num-buffers=10 ! audio/x-raw,rate=44100 ! vorbisenc ! queue ! mux.audio_0
* ]| This pipeline muxes a test video and a sine wave into a WebM file.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "webm-mux.h"
#define COMMON_VIDEO_CAPS \
"width = (int) [ 16, 4096 ], " \
"height = (int) [ 16, 4096 ], " \
"framerate = (fraction) [ 0, MAX ]"
#define COMMON_AUDIO_CAPS \
"channels = (int) [ 1, MAX ], " \
"rate = (int) [ 1, MAX ]"
G_DEFINE_TYPE (GstWebMMux, gst_webm_mux, GST_TYPE_MATROSKA_MUX);
static GstStaticPadTemplate webm_src_templ = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/webm")
);
static GstStaticPadTemplate webm_videosink_templ =
GST_STATIC_PAD_TEMPLATE ("video_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("video/x-vp8, " COMMON_VIDEO_CAPS)
);
static GstStaticPadTemplate webm_audiosink_templ =
GST_STATIC_PAD_TEMPLATE ("audio_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("audio/x-vorbis, " COMMON_AUDIO_CAPS)
);
static void
gst_webm_mux_class_init (GstWebMMuxClass * klass)
{
GstElementClass *gstelement_class = (GstElementClass *) klass;
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&webm_videosink_templ));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&webm_audiosink_templ));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&webm_src_templ));
gst_element_class_set_static_metadata (gstelement_class, "WebM muxer",
"Codec/Muxer",
"Muxes video and audio streams into a WebM stream",
"GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
}
static void
gst_webm_mux_init (GstWebMMux * mux)
{
GST_MATROSKA_MUX (mux)->doctype = GST_MATROSKA_DOCTYPE_WEBM;
}