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/* -*- c-basic-offset: 8; -*- */
/* vorbis.c: Ogg Vorbis data handlers for libshout
* $Id: vorbis.c 10686 2006-01-03 18:47:54Z brendan $
*
* Copyright (C) 2002-2004 the Icecast team <team@icecast.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
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
#include <vorbis/codec.h>
#include "shout_private.h"
#include "shout_ogg.h"
/* -- local data structures -- */
typedef struct {
vorbis_info vi;
vorbis_comment vc;
int prevW;
} vorbis_data_t;
/* -- local prototypes -- */
static int read_vorbis_page(ogg_codec_t *codec, ogg_page *page);
static void free_vorbis_data(void *codec_data);
static int vorbis_blocksize(vorbis_data_t *vd, ogg_packet *p);
/* -- vorbis functions -- */
int _shout_open_vorbis(ogg_codec_t *codec, ogg_page *page)
{
vorbis_data_t *vorbis_data = calloc(1, sizeof(vorbis_data_t));
ogg_packet packet;
if (!vorbis_data)
return SHOUTERR_MALLOC;
vorbis_info_init(&vorbis_data->vi);
vorbis_comment_init(&vorbis_data->vc);
ogg_stream_packetout(&codec->os, &packet);
if (vorbis_synthesis_headerin(&vorbis_data->vi, &vorbis_data->vc, &packet) < 0) {
free_vorbis_data(vorbis_data);
return SHOUTERR_UNSUPPORTED;
}
codec->codec_data = vorbis_data;
codec->read_page = read_vorbis_page;
codec->free_data = free_vorbis_data;
return SHOUTERR_SUCCESS;
}
static int read_vorbis_page(ogg_codec_t *codec, ogg_page *page)
{
ogg_packet packet;
vorbis_data_t *vorbis_data = codec->codec_data;
uint64_t samples = 0;
if (codec->headers < 3) {
while (ogg_stream_packetout (&codec->os, &packet) > 0) {
if (vorbis_synthesis_headerin(&vorbis_data->vi, &vorbis_data->vc, &packet) < 0)
return SHOUTERR_INSANE;
codec->headers++;
}
return SHOUTERR_SUCCESS;
}
while (ogg_stream_packetout (&codec->os, &packet) > 0)
samples += vorbis_blocksize(vorbis_data, &packet);
codec->senttime += ((samples * 1000000) / vorbis_data->vi.rate);
return SHOUTERR_SUCCESS;
}
static void free_vorbis_data(void *codec_data)
{
vorbis_data_t *vorbis_data = (vorbis_data_t *)codec_data;
vorbis_info_clear(&vorbis_data->vi);
vorbis_comment_clear(&vorbis_data->vc);
free(vorbis_data);
}
static int vorbis_blocksize(vorbis_data_t *vd, ogg_packet *p)
{
int this = vorbis_packet_blocksize(&vd->vi, p);
int ret = (this + vd->prevW)/4;
if(!vd->prevW) {
vd->prevW = this;
return 0;
}
vd->prevW = this;
return ret;
}
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