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Original commit message from CVS: 2005-09-02 Andy Wingo <wingo@pobox.com> * All plugins updated for element state changes.
204 lines
5.9 KiB
C
204 lines
5.9 KiB
C
/* GStreamer
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* Copyright (C) <2004> Thomas Vander Stichele <thomas at apestaart dot 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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 "vorbisparse.h"
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GST_DEBUG_CATEGORY_EXTERN (vorbisparse_debug);
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#define GST_CAT_DEFAULT vorbisparse_debug
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static GstElementDetails vorbis_parse_details = {
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"VorbisParse",
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"Codec/Parser/Audio",
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"parse raw vorbis streams",
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"Thomas Vander Stichele <thomas at apestaart dot org>"
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};
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/* Filter signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0
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};
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static GstStaticPadTemplate vorbis_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-vorbis")
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);
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static GstStaticPadTemplate vorbis_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-vorbis")
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);
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GST_BOILERPLATE (GstVorbisParse, gst_vorbis_parse, GstElement,
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GST_TYPE_ELEMENT);
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static GstFlowReturn vorbis_parse_chain (GstPad * pad, GstBuffer * buffer);
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static GstStateChangeReturn vorbis_parse_change_state (GstElement * element,
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GstStateChange transition);
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static void
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gst_vorbis_parse_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&vorbis_parse_src_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&vorbis_parse_sink_factory));
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gst_element_class_set_details (element_class, &vorbis_parse_details);
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}
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static void
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gst_vorbis_parse_class_init (GstVorbisParseClass * klass)
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{
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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gstelement_class->change_state = vorbis_parse_change_state;
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}
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static void
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gst_vorbis_parse_init (GstVorbisParse * parse, GstVorbisParseClass * g_class)
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{
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parse->sinkpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&vorbis_parse_sink_factory), "sink");
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gst_pad_set_chain_function (parse->sinkpad, vorbis_parse_chain);
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gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
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parse->srcpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&vorbis_parse_src_factory), "src");
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gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
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}
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static void
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vorbis_parse_set_header_on_caps (GstVorbisParse * parse, GstCaps * caps)
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{
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GstBuffer *buf1, *buf2, *buf3;
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GstStructure *structure;
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GValue list = { 0 };
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GValue value = { 0 };
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g_assert (parse);
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g_assert (parse->streamheader);
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g_assert (parse->streamheader->next);
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g_assert (parse->streamheader->next->next);
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buf1 = parse->streamheader->data;
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g_assert (buf1);
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buf2 = parse->streamheader->next->data;
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g_assert (buf2);
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buf3 = parse->streamheader->next->next->data;
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g_assert (buf3);
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structure = gst_caps_get_structure (caps, 0);
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/* mark buffers */
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GST_BUFFER_FLAG_SET (buf1, GST_BUFFER_FLAG_IN_CAPS);
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GST_BUFFER_FLAG_SET (buf2, GST_BUFFER_FLAG_IN_CAPS);
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GST_BUFFER_FLAG_SET (buf3, GST_BUFFER_FLAG_IN_CAPS);
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/* put buffers in a fixed list */
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g_value_init (&list, GST_TYPE_ARRAY);
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g_value_init (&value, GST_TYPE_BUFFER);
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g_value_set_boxed (&value, buf1);
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gst_value_list_append_value (&list, &value);
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g_value_unset (&value);
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g_value_init (&value, GST_TYPE_BUFFER);
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g_value_set_boxed (&value, buf2);
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gst_value_list_append_value (&list, &value);
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g_value_unset (&value);
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g_value_init (&value, GST_TYPE_BUFFER);
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g_value_set_boxed (&value, buf3);
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gst_value_list_append_value (&list, &value);
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gst_structure_set_value (structure, "streamheader", &list);
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g_value_unset (&value);
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g_value_unset (&list);
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}
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static GstFlowReturn
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vorbis_parse_chain (GstPad * pad, GstBuffer * buffer)
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{
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GstBuffer *buf;
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GstVorbisParse *parse;
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parse = GST_VORBIS_PARSE (GST_PAD_PARENT (pad));
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buf = GST_BUFFER (buffer);
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parse->packetno++;
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/* if 1 <= packetno <= 3, it's streamheader,
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* so put it on the streamheader list and return */
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if (parse->packetno <= 3) {
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parse->streamheader = g_list_append (parse->streamheader, buf);
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return GST_FLOW_OK;
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}
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/* else, if we haven't sent streamheader buffers yet,
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* set caps again, and send out the streamheader buffers */
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if (!parse->streamheader_sent) {
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/* mark and put on caps */
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GstCaps *caps = gst_pad_get_caps (parse->srcpad);
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vorbis_parse_set_header_on_caps (parse, caps);
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/* negotiate with these caps */
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GST_DEBUG ("here are the caps: %" GST_PTR_FORMAT, caps);
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gst_pad_set_caps (parse->srcpad, caps);
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/* push out buffers */
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gst_pad_push (parse->srcpad, parse->streamheader->data);
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gst_pad_push (parse->srcpad, parse->streamheader->next->data);
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gst_pad_push (parse->srcpad, parse->streamheader->next->next->data);
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parse->streamheader_sent = TRUE;
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}
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/* just send on buffer by default */
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gst_pad_push (parse->srcpad, buf);
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return GST_FLOW_OK;
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}
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static GstStateChangeReturn
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vorbis_parse_change_state (GstElement * element, GstStateChange transition)
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{
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GstVorbisParse *parse = GST_VORBIS_PARSE (element);
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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parse->packetno = 0;
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break;
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default:
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break;
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}
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return parent_class->change_state (element, transition);
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}
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