mirror of
https://gitlab.xiph.org/xiph/icecast-server.git
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95 lines
2.3 KiB
C
95 lines
2.3 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 MIDI logical 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 <string.h>
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#include "refbuf.h"
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#include "format_ogg.h"
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#include "client.h"
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#include "stats.h"
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#define CATMODULE "format-midi"
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#include "logging.h"
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static void midi_codec_free (ogg_state_t *ogg_info, ogg_codec_t *codec)
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{
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ICECAST_LOG_DEBUG("freeing MIDI codec");
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ogg_stream_clear (&codec->os);
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free (codec);
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}
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/* Here, we just verify the page is ok and then add it to the queue */
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static refbuf_t *process_midi_page (ogg_state_t *ogg_info, 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 (ogg_stream_pagein (&codec->os, page) < 0)
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{
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ogg_info->error = 1;
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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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/* Check for midi header in logical stream */
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ogg_codec_t *initial_midi_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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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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ICECAST_LOG_DEBUG("checking for MIDI codec");
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do
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{
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if (packet.bytes < 9)
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break;
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if (memcmp (packet.packet, "OggMIDI\000", 8) != 0)
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break;
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if (packet.bytes != 12)
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break;
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ICECAST_LOG_INFO("seen initial MIDI header");
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codec->process_page = process_midi_page;
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codec->codec_free = midi_codec_free;
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codec->headers = 1;
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codec->name = "MIDI";
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format_ogg_attach_header(ogg_info, page);
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return codec;
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} while (0);
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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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