[2295] | 1 | //transcode_speex.c: |
---|
| 2 | |
---|
| 3 | /* |
---|
| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009 |
---|
| 5 | * |
---|
| 6 | * This file is part of libroardsp a part of RoarAudio, |
---|
| 7 | * a cross-platform sound system for both, home and professional use. |
---|
| 8 | * See README for details. |
---|
| 9 | * |
---|
| 10 | * This file is free software; you can redistribute it and/or modify |
---|
| 11 | * it under the terms of the GNU General Public License version 3 |
---|
| 12 | * as published by the Free Software Foundation. |
---|
| 13 | * |
---|
| 14 | * libroardsp is distributed in the hope that it will be useful, |
---|
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
| 17 | * GNU General Public License for more details. |
---|
| 18 | * |
---|
| 19 | * You should have received a copy of the GNU General Public License |
---|
| 20 | * along with this software; see the file COPYING. If not, write to |
---|
| 21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
---|
| 22 | * |
---|
| 23 | */ |
---|
| 24 | |
---|
| 25 | #include "libroardsp.h" |
---|
| 26 | |
---|
| 27 | #ifdef ROAR_HAVE_LIBSPEEX |
---|
| 28 | |
---|
| 29 | #define _16BIT (16/8) |
---|
| 30 | #define _SIZE_LEN 2 |
---|
| 31 | |
---|
[2296] | 32 | int roar_xcoder_speex_init (struct roar_xcoder * state) { |
---|
[2298] | 33 | struct roar_xcoder_speex * self = malloc(sizeof(struct roar_xcoder_speex)); |
---|
| 34 | struct roar_audio_info * info = &(state->info.pcm); |
---|
| 35 | int tmp; |
---|
| 36 | |
---|
| 37 | if ( self == NULL ) |
---|
| 38 | return -1; |
---|
| 39 | |
---|
| 40 | // curruntly only 16 bit mode is supported |
---|
| 41 | if ( info->bits != 16 ) { |
---|
| 42 | free(self); |
---|
| 43 | return -1; |
---|
| 44 | } |
---|
| 45 | |
---|
[2305] | 46 | // only mono/stereo mode is supported |
---|
| 47 | switch (info->channels) { |
---|
| 48 | case 1: self->stereo = 0; break; |
---|
| 49 | case 2: self->stereo = 1; break; |
---|
| 50 | default: |
---|
| 51 | free(self); |
---|
| 52 | return -1; |
---|
[2298] | 53 | } |
---|
| 54 | |
---|
| 55 | memset(self, 0, sizeof(struct roar_xcoder_speex)); |
---|
| 56 | |
---|
| 57 | state->inst = self; |
---|
| 58 | |
---|
| 59 | self->mode = ROAR_SPEEX_MODE_UWB; |
---|
| 60 | |
---|
| 61 | if (state->encode) { |
---|
| 62 | switch (self->mode) { |
---|
| 63 | case ROAR_SPEEX_MODE_NB: self->xcoder = speex_encoder_init(&speex_nb_mode); break; |
---|
| 64 | case ROAR_SPEEX_MODE_WB: self->xcoder = speex_encoder_init(&speex_wb_mode); break; |
---|
| 65 | case ROAR_SPEEX_MODE_UWB: self->xcoder = speex_encoder_init(&speex_uwb_mode); break; |
---|
| 66 | } |
---|
| 67 | tmp = 8; |
---|
[2302] | 68 | speex_encoder_ctl(self->xcoder, SPEEX_SET_QUALITY, &tmp); |
---|
| 69 | tmp = info->rate; |
---|
| 70 | speex_encoder_ctl(self->xcoder, SPEEX_SET_SAMPLING_RATE, &tmp); |
---|
| 71 | speex_encoder_ctl(self->xcoder, SPEEX_GET_FRAME_SIZE, &(self->frame_size)); |
---|
[2298] | 72 | } else { |
---|
| 73 | self->xcoder = NULL; |
---|
| 74 | } |
---|
| 75 | |
---|
| 76 | speex_bits_init(&(self->bits)); |
---|
| 77 | |
---|
| 78 | return 0; |
---|
[2296] | 79 | } |
---|
| 80 | |
---|
| 81 | int roar_xcoder_speex_uninit (struct roar_xcoder * state) { |
---|
[2298] | 82 | struct roar_xcoder_speex * self = state->inst; |
---|
| 83 | |
---|
| 84 | if ( self->xcoder != NULL ) { |
---|
| 85 | if (state->encode) { |
---|
| 86 | speex_encoder_destroy(self->xcoder); |
---|
| 87 | } else { |
---|
| 88 | speex_decoder_destroy(self->xcoder); |
---|
| 89 | } |
---|
| 90 | } |
---|
| 91 | |
---|
| 92 | speex_bits_destroy(&(self->bits)); |
---|
| 93 | |
---|
| 94 | free(self); |
---|
| 95 | |
---|
| 96 | return 0; |
---|
[2296] | 97 | } |
---|
| 98 | |
---|
| 99 | int roar_xcoder_speex_packet_size(struct roar_xcoder * state, int samples) { |
---|
[2298] | 100 | struct roar_xcoder_speex * self = state->inst; |
---|
[2300] | 101 | |
---|
| 102 | if (!state->encode) |
---|
| 103 | if (state->stage != ROAR_XCODER_STAGE_OPENED) |
---|
| 104 | return -1; |
---|
[2298] | 105 | |
---|
[2305] | 106 | return _16BIT * self->frame_size * (self->stereo ? 2 : 1); |
---|
[2296] | 107 | } |
---|
| 108 | |
---|
| 109 | int roar_xcoder_speex_encode (struct roar_xcoder * state, void * buf, size_t len) { |
---|
[2299] | 110 | struct roar_xcoder_speex * self = state->inst; |
---|
| 111 | uint16_t tmp_net; |
---|
| 112 | int pkg_len; |
---|
| 113 | |
---|
| 114 | if (!state->encode) |
---|
| 115 | return -1; |
---|
| 116 | |
---|
| 117 | ROAR_DBG("roar_xcoder_speex_encode(*): Encoding..."); |
---|
| 118 | |
---|
| 119 | if ( state->stage == ROAR_XCODER_STAGE_INITED ) { |
---|
| 120 | if ( roar_vio_write(state->backend, ROAR_SPEEX_MAGIC, ROAR_SPEEX_MAGIC_LEN) != ROAR_SPEEX_MAGIC_LEN ) |
---|
| 121 | return -1; |
---|
| 122 | state->stage = ROAR_XCODER_STAGE_MAGIC; |
---|
| 123 | ROAR_DBG("roar_xcoder_speex_encode(*): Wrote MAGIC"); |
---|
| 124 | |
---|
| 125 | state->stage = ROAR_XCODER_STAGE_OPENING; |
---|
| 126 | |
---|
| 127 | tmp_net = ROAR_HOST2NET16(self->mode); |
---|
| 128 | if ( roar_vio_write(state->backend, &tmp_net, 2) != 2 ) |
---|
| 129 | return -1; |
---|
| 130 | |
---|
| 131 | state->stage = ROAR_XCODER_STAGE_OPENED; |
---|
| 132 | } |
---|
| 133 | |
---|
| 134 | speex_bits_reset(&(self->bits)); |
---|
| 135 | |
---|
[2305] | 136 | if ( self->stereo ) |
---|
| 137 | speex_encode_stereo_int((spx_int16_t *) buf, self->frame_size, &(self->bits)); |
---|
| 138 | |
---|
[2299] | 139 | speex_encode_int(self->xcoder, (spx_int16_t *) buf, &(self->bits)); |
---|
| 140 | |
---|
| 141 | pkg_len = speex_bits_write(&(self->bits), self->cc, ROAR_SPEEX_MAX_CC); |
---|
| 142 | |
---|
| 143 | tmp_net = ROAR_HOST2NET16(pkg_len); |
---|
| 144 | |
---|
| 145 | if ( roar_vio_write(state->backend, &tmp_net, 2) != 2 ) |
---|
| 146 | return -1; |
---|
| 147 | |
---|
| 148 | if ( roar_vio_write(state->backend, self->cc, pkg_len) != pkg_len ) |
---|
| 149 | return -1; |
---|
| 150 | |
---|
| 151 | return 0; |
---|
[2296] | 152 | } |
---|
| 153 | |
---|
[2305] | 154 | // TODO: move all the init thingys into a seperate function |
---|
[2296] | 155 | int roar_xcoder_speex_decode (struct roar_xcoder * state, void * buf, size_t len) { |
---|
[2300] | 156 | struct roar_xcoder_speex * self = state->inst; |
---|
| 157 | char magic[ROAR_SPEEX_MAGIC_LEN]; |
---|
| 158 | uint16_t tmp_net; |
---|
| 159 | int pkg_len; |
---|
| 160 | int tmp; |
---|
[2305] | 161 | SpeexStereoState stereo = SPEEX_STEREO_STATE_INIT; |
---|
| 162 | SpeexCallback callback; |
---|
[2300] | 163 | |
---|
| 164 | if ( state->stage == ROAR_XCODER_STAGE_INITED ) { |
---|
| 165 | if ( roar_vio_read(state->backend, magic, ROAR_SPEEX_MAGIC_LEN) != ROAR_SPEEX_MAGIC_LEN ) |
---|
| 166 | return -1; |
---|
| 167 | |
---|
| 168 | if ( memcmp(magic, ROAR_SPEEX_MAGIC, ROAR_SPEEX_MAGIC_LEN) != 0 ) |
---|
| 169 | return -1; |
---|
| 170 | |
---|
| 171 | state->stage = ROAR_XCODER_STAGE_MAGIC; |
---|
| 172 | |
---|
| 173 | if ( roar_vio_read(state->backend, &tmp_net, 2) != 2 ) |
---|
| 174 | return -1; |
---|
| 175 | |
---|
| 176 | self->mode = ROAR_NET2HOST16(tmp_net); |
---|
| 177 | |
---|
| 178 | state->stage = ROAR_XCODER_STAGE_OPENING; |
---|
| 179 | |
---|
| 180 | switch (self->mode) { |
---|
| 181 | case ROAR_SPEEX_MODE_NB: self->xcoder = speex_decoder_init(&speex_nb_mode); break; |
---|
| 182 | case ROAR_SPEEX_MODE_WB: self->xcoder = speex_decoder_init(&speex_wb_mode); break; |
---|
| 183 | case ROAR_SPEEX_MODE_UWB: self->xcoder = speex_decoder_init(&speex_uwb_mode); break; |
---|
| 184 | default: |
---|
| 185 | return -1; |
---|
| 186 | break; |
---|
| 187 | } |
---|
| 188 | |
---|
| 189 | tmp=1; |
---|
| 190 | speex_decoder_ctl(self->xcoder, SPEEX_SET_ENH, &tmp); |
---|
[2302] | 191 | tmp = state->info.pcm.rate; |
---|
| 192 | speex_encoder_ctl(self->xcoder, SPEEX_SET_SAMPLING_RATE, &tmp); |
---|
[2300] | 193 | speex_decoder_ctl(self->xcoder, SPEEX_GET_FRAME_SIZE, &(self->frame_size)); |
---|
| 194 | |
---|
[2305] | 195 | if ( self->stereo ) { |
---|
| 196 | memcpy(&(self->stereo_state), &stereo, sizeof(self->stereo_state)); |
---|
| 197 | |
---|
| 198 | callback.callback_id = SPEEX_INBAND_STEREO; |
---|
| 199 | callback.func = speex_std_stereo_request_handler; |
---|
| 200 | callback.data = &(self->stereo_state); |
---|
| 201 | |
---|
| 202 | speex_decoder_ctl(self->xcoder, SPEEX_SET_HANDLER, &callback); |
---|
| 203 | } |
---|
| 204 | |
---|
[2300] | 205 | state->stage = ROAR_XCODER_STAGE_OPENED; |
---|
| 206 | } |
---|
| 207 | |
---|
| 208 | if ( roar_vio_read(state->backend, &tmp_net, 2) != 2 ) |
---|
| 209 | return -1; |
---|
| 210 | |
---|
| 211 | pkg_len = ROAR_NET2HOST16(tmp_net); |
---|
| 212 | |
---|
| 213 | if ( pkg_len > ROAR_SPEEX_MAX_CC ) |
---|
| 214 | return -1; |
---|
| 215 | |
---|
| 216 | if ( roar_vio_read(state->backend, self->cc, pkg_len) != pkg_len ) |
---|
| 217 | return -1; |
---|
| 218 | |
---|
| 219 | speex_bits_read_from(&(self->bits), self->cc, pkg_len); |
---|
| 220 | |
---|
| 221 | speex_decode_int(self->xcoder, &(self->bits), buf); |
---|
| 222 | |
---|
[2305] | 223 | if ( self->stereo ) { |
---|
| 224 | speex_decode_stereo_int(buf, self->frame_size, &(self->stereo_state)); |
---|
| 225 | } |
---|
| 226 | |
---|
[2300] | 227 | return 0; |
---|
[2296] | 228 | } |
---|
| 229 | |
---|
[2295] | 230 | #endif |
---|
| 231 | |
---|
| 232 | //ll |
---|