gstreamer/ext/vorbis/vorbisparse.c
Wim Taymans 8011ea8e2d Fix some more docs.
Original commit message from CVS:
* docs/plugins/Makefile.am:
* docs/plugins/gst-plugins-base-plugins-docs.sgml:
* docs/plugins/gst-plugins-base-plugins-sections.txt:
* ext/gnomevfs/gstgnomevfssink.h:
* ext/gnomevfs/gstgnomevfssrc.h:
* ext/vorbis/vorbisdec.c: (vorbis_handle_data_packet):
* ext/vorbis/vorbisdec.h:
* ext/vorbis/vorbisenc.c: (gst_vorbisenc_convert_sink):
* ext/vorbis/vorbisenc.h:
* ext/vorbis/vorbisparse.c: (vorbis_parse_set_header_on_caps),
(vorbis_parse_chain), (vorbis_parse_change_state):
* ext/vorbis/vorbisparse.h:
* gst/audioconvert/gstaudioconvert.h:
* gst/tcp/gsttcpserversink.h:
* gst/videotestsrc/gstvideotestsrc.c:
* gst/videotestsrc/gstvideotestsrc.h:
* gst/volume/gstvolume.c:
* gst/volume/gstvolume.h:
Fix some more docs.
Added docs for vorbisdec and vorbisparse.
Fix vorbisparse.
2006-03-01 17:39:28 +00:00

248 lines
7.4 KiB
C

/* GStreamer
* Copyright (C) <2004> Thomas Vander Stichele <thomas at apestaart dot org>
*
* 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-vorbisparse
* @short_description: parses vorbis streams
* @see_also: vorbisdec, oggdemux
*
* <refsect2>
* <para>
* The vorbisparse element will parse the header packets of the Vorbis
* stream and put them as the streamheader in the caps. This is used in the
* multifdsink case where you want to stream live vorbis streams to multiple
* clients, each client has to receive the streamheaders first before they can
* consume the vorbis packets.
* </para>
* <title>Example pipelines</title>
* <para>
* <programlisting>
* gst-launch -v filesrc location=sine.ogg ! oggdemux ! vorbisparse ! fakesink
* </programlisting>
* This pipeline shows that the streamheader is set in the caps.
* </para>
* </refsect2>
*
* Last reviewed on 2006-03-01 (0.10.4)
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "vorbisparse.h"
GST_DEBUG_CATEGORY_EXTERN (vorbisparse_debug);
#define GST_CAT_DEFAULT vorbisparse_debug
static GstElementDetails vorbis_parse_details = {
"VorbisParse",
"Codec/Parser/Audio",
"parse raw vorbis streams",
"Thomas Vander Stichele <thomas at apestaart dot org>"
};
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0
};
static GstStaticPadTemplate vorbis_parse_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-vorbis")
);
static GstStaticPadTemplate vorbis_parse_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-vorbis")
);
GST_BOILERPLATE (GstVorbisParse, gst_vorbis_parse, GstElement,
GST_TYPE_ELEMENT);
static GstFlowReturn vorbis_parse_chain (GstPad * pad, GstBuffer * buffer);
static GstStateChangeReturn vorbis_parse_change_state (GstElement * element,
GstStateChange transition);
static void
gst_vorbis_parse_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&vorbis_parse_src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&vorbis_parse_sink_factory));
gst_element_class_set_details (element_class, &vorbis_parse_details);
}
static void
gst_vorbis_parse_class_init (GstVorbisParseClass * klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
gstelement_class->change_state = vorbis_parse_change_state;
}
static void
gst_vorbis_parse_init (GstVorbisParse * parse, GstVorbisParseClass * g_class)
{
parse->sinkpad =
gst_pad_new_from_static_template (&vorbis_parse_sink_factory, "sink");
gst_pad_set_chain_function (parse->sinkpad, vorbis_parse_chain);
gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
parse->srcpad =
gst_pad_new_from_static_template (&vorbis_parse_src_factory, "src");
gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
}
static void
vorbis_parse_set_header_on_caps (GstVorbisParse * parse, GstCaps * caps)
{
GstBuffer *buf1, *buf2, *buf3;
GstStructure *structure;
GValue array = { 0 };
GValue value = { 0 };
g_assert (parse);
g_assert (parse->streamheader);
g_assert (parse->streamheader->next);
g_assert (parse->streamheader->next->next);
buf1 = parse->streamheader->data;
g_assert (buf1);
buf2 = parse->streamheader->next->data;
g_assert (buf2);
buf3 = parse->streamheader->next->next->data;
g_assert (buf3);
structure = gst_caps_get_structure (caps, 0);
/* mark buffers */
GST_BUFFER_FLAG_SET (buf1, GST_BUFFER_FLAG_IN_CAPS);
GST_BUFFER_FLAG_SET (buf2, GST_BUFFER_FLAG_IN_CAPS);
GST_BUFFER_FLAG_SET (buf3, GST_BUFFER_FLAG_IN_CAPS);
/* put buffers in a fixed list */
g_value_init (&array, GST_TYPE_ARRAY);
g_value_init (&value, GST_TYPE_BUFFER);
gst_value_set_buffer (&value, buf1);
gst_value_array_append_value (&array, &value);
g_value_unset (&value);
g_value_init (&value, GST_TYPE_BUFFER);
gst_value_set_buffer (&value, buf2);
gst_value_array_append_value (&array, &value);
g_value_unset (&value);
g_value_init (&value, GST_TYPE_BUFFER);
gst_value_set_buffer (&value, buf3);
gst_value_array_append_value (&array, &value);
gst_structure_set_value (structure, "streamheader", &array);
g_value_unset (&value);
g_value_unset (&array);
}
static GstFlowReturn
vorbis_parse_chain (GstPad * pad, GstBuffer * buffer)
{
GstFlowReturn ret;
GstBuffer *buf;
GstVorbisParse *parse;
parse = GST_VORBIS_PARSE (GST_PAD_PARENT (pad));
buf = GST_BUFFER (buffer);
parse->packetno++;
/* if 1 <= packetno <= 3, it's streamheader,
* so put it on the streamheader list and return */
if (parse->packetno <= 3) {
parse->streamheader = g_list_append (parse->streamheader, buf);
return GST_FLOW_OK;
}
/* else, if we haven't sent streamheader buffers yet,
* set caps again, and send out the streamheader buffers */
if (!parse->streamheader_sent) {
/* mark and put on caps */
GstCaps *padcaps, *caps;
GstBuffer *outbuf;
padcaps = gst_pad_get_caps (parse->srcpad);
caps = gst_caps_make_writable (padcaps);
gst_caps_unref (padcaps);
vorbis_parse_set_header_on_caps (parse, caps);
/* negotiate with these caps */
GST_DEBUG_OBJECT (parse, "here are the caps: %" GST_PTR_FORMAT, caps);
gst_pad_set_caps (parse->srcpad, caps);
gst_caps_unref (caps);
/* push out buffers, ignoring return value... */
outbuf = GST_BUFFER_CAST (parse->streamheader->data);
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (parse->srcpad));
gst_pad_push (parse->srcpad, outbuf);
outbuf = GST_BUFFER_CAST (parse->streamheader->next->data);
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (parse->srcpad));
gst_pad_push (parse->srcpad, outbuf);
outbuf = GST_BUFFER_CAST (parse->streamheader->next->next->data);
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (parse->srcpad));
gst_pad_push (parse->srcpad, outbuf);
g_list_free (parse->streamheader);
parse->streamheader = NULL;
parse->streamheader_sent = TRUE;
}
/* just send on buffer by default */
gst_buffer_set_caps (buf, GST_PAD_CAPS (parse->srcpad));
ret = gst_pad_push (parse->srcpad, buf);
return ret;
}
static GstStateChangeReturn
vorbis_parse_change_state (GstElement * element, GstStateChange transition)
{
GstVorbisParse *parse = GST_VORBIS_PARSE (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
parse->packetno = 0;
parse->streamheader_sent = FALSE;
break;
default:
break;
}
ret = parent_class->change_state (element, transition);
return ret;
}