1 /*- 2 * Copyright (c) 2015 Hans Petter Selasky 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #ifndef _BACKEND_BT_H_ 27 #define _BACKEND_BT_H_ 28 29 #ifdef HAVE_LIBAV 30 #include <libavformat/avformat.h> 31 #include <libavcodec/avcodec.h> 32 #include <libavutil/opt.h> 33 #endif 34 35 #include "sbc_encode.h" 36 37 struct bt_config { 38 uint8_t sep; /* SEID of the peer */ 39 uint8_t media_Type; 40 uint8_t chmode; 41 #define MODE_STEREO 2 42 #define MODE_JOINT 3 43 #define MODE_DUAL 1 44 #define MODE_MONO 0 45 uint8_t allocm; 46 #define ALLOC_LOUDNESS 0 47 #define ALLOC_SNR 1 48 uint8_t bitpool; 49 uint8_t bands; 50 #define BANDS_4 0 51 #define BANDS_8 1 52 uint8_t blocks; 53 #define BLOCKS_4 0 54 #define BLOCKS_8 1 55 #define BLOCKS_12 2 56 #define BLOCKS_16 3 57 uint8_t freq; 58 #define FREQ_UNDEFINED 255 59 #define FREQ_16K 0 60 #define FREQ_32K 1 61 #define FREQ_44_1K 2 62 #define FREQ_48K 3 63 uint16_t mtu; 64 uint8_t codec; 65 #define CODEC_SBC 0x00 66 #define CODEC_AAC 0x02 67 uint8_t aacMode1; 68 uint8_t aacMode2; 69 70 /* transcoding handle(s) */ 71 union { 72 #ifdef HAVE_LIBAV 73 struct { 74 AVCodec *codec; 75 AVCodecContext *context; 76 AVFormatContext *format; 77 AVFrame *frame; 78 AVStream *stream; 79 } av; 80 #endif 81 struct sbc_encode *sbc_enc; 82 } handle; 83 84 /* audio input buffer */ 85 uint32_t rem_in_len; 86 uint32_t rem_in_size; 87 uint8_t *rem_in_data; 88 89 /* data transport */ 90 uint32_t mtu_seqnumber; 91 uint32_t mtu_timestamp; 92 uint32_t mtu_offset; 93 94 /* bluetooth file handles */ 95 int fd; 96 int hc; 97 98 /* scratch buffer */ 99 uint8_t mtu_data[65536]; 100 101 /* acceptor state */ 102 int8_t acceptor_state; 103 #define acpInitial 1 104 #define acpConfigurationSet 2 105 #define acpStreamOpened 3 106 #define acpStreamStarted 4 107 #define acpStreamSuspended 5 108 #define acpStreamClosed 6 109 }; 110 111 size_t sbc_encode_frame(struct bt_config *); 112 size_t sbc_decode_frame(struct bt_config *, int); 113 114 int bt_receive(struct bt_config *cfg, void *ptr, int len, int use_delay); 115 116 #endif /* _BACKEND_BT_H_ */ 117