/* -*- 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;

}