mirror of
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108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/* Icecast
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*
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* This program is distributed under the GNU General Public License, version 2.
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* A copy of this license is included with this source.
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*
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* Copyright 2000-2004, Jack Moffitt <jack@xiph.org>,
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* Michael Smith <msmith@xiph.org>,
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* oddsock <oddsock@xiph.org>,
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* Karl Heyes <karl@xiph.org>
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* and others (see AUTHORS for details).
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* Copyright 2014-2018, Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
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*/
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/* Ogg codec handler for speex streams */
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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 <stdlib.h>
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#include <ogg/ogg.h>
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#include <speex/speex_header.h>
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#include "format_speex.h"
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#include "refbuf.h"
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#include "client.h"
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#define CATMODULE "format-speex"
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#include "logging.h"
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static void speex_codec_free (ogg_state_t *ogg_info, ogg_codec_t *codec)
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{
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ogg_stream_clear (&codec->os);
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free (codec);
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}
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static refbuf_t *process_speex_page (ogg_state_t *ogg_info,
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ogg_codec_t *codec, ogg_page *page, format_plugin_t *plugin)
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{
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refbuf_t *refbuf;
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if (codec->headers < 2)
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{
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ogg_packet packet;
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ogg_stream_pagein (&codec->os, page);
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while (ogg_stream_packetout (&codec->os, &packet) > 0)
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{
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/* first time around (normal case) yields comments */
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codec->headers++;
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}
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/* add header page to associated list */
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format_ogg_attach_header (ogg_info, page);
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return NULL;
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}
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refbuf = make_refbuf_with_page (page);
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return refbuf;
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}
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ogg_codec_t *initial_speex_page (format_plugin_t *plugin, ogg_page *page)
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{
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ogg_state_t *ogg_info = plugin->_state;
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ogg_codec_t *codec = calloc (1, sizeof (ogg_codec_t));
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ogg_packet packet;
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SpeexHeader *header;
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ogg_stream_init (&codec->os, ogg_page_serialno (page));
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ogg_stream_pagein (&codec->os, page);
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ogg_stream_packetout (&codec->os, &packet);
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/* Check for te first packet to be at least of the minimal size for a Speex header.
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* The header size is 80 bytes as per specs. You can find the specs here:
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* https://speex.org/docs/manual/speex-manual/node8.html#SECTION00830000000000000000
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*
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* speex_packet_to_header() will also check the header size for us. However
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* that function generates noise on stderr in case the header is too short.
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* This is dangerous as we may have closed stderr already and the handle may be use
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* again for something else.
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*/
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if (packet.bytes < 80) {
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ICECAST_LOG_DDEBUG("Header too small for Speex, so skipping Speex test.");
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ogg_stream_clear (&codec->os);
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free (codec);
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return NULL;
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}
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ICECAST_LOG_DEBUG("checking for speex codec");
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header = speex_packet_to_header ((char*)packet.packet, packet.bytes);
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if (header == NULL)
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{
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ogg_stream_clear (&codec->os);
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free (header);
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free (codec);
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return NULL;
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}
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ICECAST_LOG_INFO("seen initial speex header");
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codec->process_page = process_speex_page;
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codec->codec_free = speex_codec_free;
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codec->headers = 1;
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format_ogg_attach_header (ogg_info, page);
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free (header);
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return codec;
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}
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