/*-
 * Copyright (c) 2015 Hans Petter Selasky
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _BACKEND_BT_H_
#define _BACKEND_BT_H_

#ifdef HAVE_LIBAV
#include <libavformat/avformat.h>
#include <libavcodec/avcodec.h>
#include <libavutil/opt.h>
#endif

#include "sbc_encode.h"

struct bt_config {
        uint8_t sep;                    /* SEID of the peer */
        uint8_t media_Type;
        uint8_t chmode;
#define MODE_STEREO     2
#define MODE_JOINT      3
#define MODE_DUAL       1
#define MODE_MONO       0
        uint8_t allocm;
#define ALLOC_LOUDNESS  0
#define ALLOC_SNR       1
        uint8_t bitpool;
        uint8_t bands;
#define BANDS_4         0
#define BANDS_8         1
        uint8_t blocks;
#define BLOCKS_4        0
#define BLOCKS_8        1
#define BLOCKS_12       2
#define BLOCKS_16       3
        uint8_t freq;
#define FREQ_UNDEFINED  255
#define FREQ_16K        0
#define FREQ_32K        1
#define FREQ_44_1K      2
#define FREQ_48K        3
        uint16_t mtu;
        uint8_t codec;
#define CODEC_SBC 0x00
#define CODEC_AAC 0x02
        uint8_t aacMode1;
        uint8_t aacMode2;

        /* transcoding handle(s) */
        union {
#ifdef HAVE_LIBAV
                struct {
                        AVCodec *codec;
                        AVCodecContext *context;
                        AVFormatContext *format;
                        AVFrame *frame;
                        AVStream *stream;
                } av;
#endif
                struct sbc_encode *sbc_enc;
        }       handle;

        /* audio input buffer */
        uint32_t rem_in_len;
        uint32_t rem_in_size;
        uint8_t *rem_in_data;

        /* data transport */
        uint32_t mtu_seqnumber;
        uint32_t mtu_timestamp;
        uint32_t mtu_offset;

        /* bluetooth file handles */
        int fd;
        int hc;

        /* scratch buffer */
        uint8_t mtu_data[65536];

        /* acceptor state */
        int8_t  acceptor_state;
#define acpInitial 1
#define acpConfigurationSet 2
#define acpStreamOpened 3
#define acpStreamStarted 4
#define acpStreamSuspended 5
#define acpStreamClosed 6
};

size_t  sbc_encode_frame(struct bt_config *);
size_t  sbc_decode_frame(struct bt_config *, int);

int     bt_receive(struct bt_config *cfg, void *ptr, int len, int use_delay);

#endif                                  /* _BACKEND_BT_H_ */