1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 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 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 39 #include <stdint.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 44 #include "btstack.h" 45 46 #include "hxcmod.h" 47 #include "mods/mod.h" 48 49 #define NUM_CHANNELS 2 50 #define A2DP_SAMPLE_RATE 44100 51 #define BYTES_PER_AUDIO_SAMPLE (2*NUM_CHANNELS) 52 #define AUDIO_TIMEOUT_MS 10 53 #define TABLE_SIZE_441HZ 100 54 55 typedef enum { 56 STREAM_SINE, 57 STREAM_MOD 58 } stream_data_source_t; 59 60 typedef struct { 61 uint16_t a2dp_cid; 62 uint8_t local_seid; 63 64 uint32_t time_audio_data_sent; // ms 65 uint32_t acc_num_missed_samples; 66 uint32_t samples_ready; 67 btstack_timer_source_t audio_timer; 68 uint8_t streaming; 69 int max_media_payload_size; 70 71 uint8_t sbc_storage[1030]; 72 uint16_t sbc_storage_count; 73 uint8_t sbc_ready_to_send; 74 } a2dp_media_sending_context_t; 75 76 static uint8_t media_sbc_codec_capabilities[] = { 77 (AVDTP_SBC_44100 << 4) | AVDTP_SBC_STEREO, 78 0xFF,//(AVDTP_SBC_BLOCK_LENGTH_16 << 4) | (AVDTP_SBC_SUBBANDS_8 << 2) | AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS, 79 2, 53 80 }; 81 82 static const int16_t sine_int16[] = { 83 0, 2057, 4107, 6140, 8149, 10126, 12062, 13952, 15786, 17557, 84 19260, 20886, 22431, 23886, 25247, 26509, 27666, 28714, 29648, 30466, 85 31163, 31738, 32187, 32509, 32702, 32767, 32702, 32509, 32187, 31738, 86 31163, 30466, 29648, 28714, 27666, 26509, 25247, 23886, 22431, 20886, 87 19260, 17557, 15786, 13952, 12062, 10126, 8149, 6140, 4107, 2057, 88 0, -2057, -4107, -6140, -8149, -10126, -12062, -13952, -15786, -17557, 89 -19260, -20886, -22431, -23886, -25247, -26509, -27666, -28714, -29648, -30466, 90 -31163, -31738, -32187, -32509, -32702, -32767, -32702, -32509, -32187, -31738, 91 -31163, -30466, -29648, -28714, -27666, -26509, -25247, -23886, -22431, -20886, 92 -19260, -17557, -15786, -13952, -12062, -10126, -8149, -6140, -4107, -2057, 93 }; 94 95 static char * device_name = "A2DP Source BTstack"; 96 97 #ifdef HAVE_BTSTACK_STDIN 98 // mac 2011: static const char * device_addr_string = "04:0C:CE:E4:85:D3"; 99 // pts: static const char * device_addr_string = "00:1B:DC:08:0A:A5"; 100 // mac 2013: static const char * device_addr_string = "84:38:35:65:d1:15"; 101 // phone 2013: static const char * device_addr_string = "D8:BB:2C:DF:F0:F2"; 102 // minijambox: 103 static const char * device_addr_string = "00:21:3C:AC:F7:38"; 104 // head phones: static const char * device_addr_string = "00:18:09:28:50:18"; 105 // bt dongle: static const char * device_addr_string = "00:15:83:5F:9D:46"; 106 #endif 107 108 static bd_addr_t device_addr; 109 static uint8_t sdp_a2dp_source_service_buffer[150]; 110 static uint8_t media_sbc_codec_configuration[4]; 111 static a2dp_media_sending_context_t media_tracker; 112 113 static stream_data_source_t data_source; 114 115 static int sine_phase; 116 117 static int hxcmod_initialized; 118 static modcontext mod_context; 119 static tracker_buffer_state trkbuf; 120 121 static void a2dp_demo_send_media_packet(void){ 122 int num_bytes_in_frame = btstack_sbc_encoder_sbc_buffer_length(); 123 int bytes_in_storage = media_tracker.sbc_storage_count; 124 uint8_t num_frames = bytes_in_storage / num_bytes_in_frame; 125 a2dp_source_stream_send_media_payload(media_tracker.local_seid, media_tracker.sbc_storage, bytes_in_storage, num_frames, 0); 126 media_tracker.sbc_storage_count = 0; 127 media_tracker.sbc_ready_to_send = 0; 128 } 129 130 static void produce_sine_audio(int16_t * pcm_buffer, int num_samples_to_write){ 131 int count; 132 for (count = 0; count < num_samples_to_write ; count++){ 133 pcm_buffer[count * 2] = sine_int16[sine_phase]; 134 pcm_buffer[count * 2 + 1] = sine_int16[sine_phase]; 135 sine_phase++; 136 if (sine_phase >= TABLE_SIZE_441HZ){ 137 sine_phase -= TABLE_SIZE_441HZ; 138 } 139 } 140 } 141 142 static void produce_mod_audio(int16_t * pcm_buffer, int num_samples_to_write){ 143 hxcmod_fillbuffer(&mod_context, (unsigned short *) &pcm_buffer[0], num_samples_to_write, &trkbuf); 144 } 145 146 static void produce_audio(int16_t * pcm_buffer, int num_samples){ 147 switch (data_source){ 148 case STREAM_SINE: 149 produce_sine_audio(pcm_buffer, num_samples); 150 break; 151 case STREAM_MOD: 152 produce_mod_audio(pcm_buffer, num_samples); 153 break; 154 } 155 } 156 157 static int a2dp_demo_fill_sbc_audio_buffer(a2dp_media_sending_context_t * context){ 158 // perform sbc encodin 159 int total_num_bytes_read = 0; 160 int num_audio_samples_per_sbc_buffer = btstack_sbc_encoder_num_audio_frames(); 161 while (context->samples_ready >= num_audio_samples_per_sbc_buffer 162 && (context->max_media_payload_size - context->sbc_storage_count) >= btstack_sbc_encoder_sbc_buffer_length()){ 163 164 uint8_t pcm_frame[256*BYTES_PER_AUDIO_SAMPLE]; 165 166 produce_audio((int16_t *) pcm_frame, num_audio_samples_per_sbc_buffer); 167 btstack_sbc_encoder_process_data((int16_t *) pcm_frame); 168 169 uint16_t sbc_frame_size = btstack_sbc_encoder_sbc_buffer_length(); 170 uint8_t * sbc_frame = btstack_sbc_encoder_sbc_buffer(); 171 172 total_num_bytes_read += num_audio_samples_per_sbc_buffer; 173 memcpy(&context->sbc_storage[context->sbc_storage_count], sbc_frame, sbc_frame_size); 174 context->sbc_storage_count += sbc_frame_size; 175 context->samples_ready -= num_audio_samples_per_sbc_buffer; 176 } 177 return total_num_bytes_read; 178 } 179 180 static void a2dp_demo_audio_timeout_handler(btstack_timer_source_t * timer){ 181 a2dp_media_sending_context_t * context = (a2dp_media_sending_context_t *) btstack_run_loop_get_timer_context(timer); 182 btstack_run_loop_set_timer(&context->audio_timer, AUDIO_TIMEOUT_MS); 183 btstack_run_loop_add_timer(&context->audio_timer); 184 uint32_t now = btstack_run_loop_get_time_ms(); 185 186 uint32_t update_period_ms = AUDIO_TIMEOUT_MS; 187 if (context->time_audio_data_sent > 0){ 188 update_period_ms = now - context->time_audio_data_sent; 189 } 190 191 uint32_t num_samples = (update_period_ms * A2DP_SAMPLE_RATE) / 1000; 192 context->acc_num_missed_samples += (update_period_ms * A2DP_SAMPLE_RATE) % 1000; 193 194 while (context->acc_num_missed_samples >= 1000){ 195 num_samples++; 196 context->acc_num_missed_samples -= 1000; 197 } 198 context->time_audio_data_sent = now; 199 context->samples_ready += num_samples; 200 201 if (context->sbc_ready_to_send) return; 202 203 a2dp_demo_fill_sbc_audio_buffer(context); 204 205 if ((context->sbc_storage_count + btstack_sbc_encoder_sbc_buffer_length()) > context->max_media_payload_size){ 206 // schedule sending 207 context->sbc_ready_to_send = 1; 208 a2dp_source_stream_endpoint_request_can_send_now(context->local_seid); 209 } 210 } 211 212 static void a2dp_demo_timer_start(a2dp_media_sending_context_t * context){ 213 context->max_media_payload_size = a2dp_max_media_payload_size(context->local_seid); 214 context->sbc_storage_count = 0; 215 context->sbc_ready_to_send = 0; 216 context->streaming = 1; 217 btstack_run_loop_remove_timer(&context->audio_timer); 218 btstack_run_loop_set_timer_handler(&context->audio_timer, a2dp_demo_audio_timeout_handler); 219 btstack_run_loop_set_timer_context(&context->audio_timer, context); 220 btstack_run_loop_set_timer(&context->audio_timer, AUDIO_TIMEOUT_MS); 221 btstack_run_loop_add_timer(&context->audio_timer); 222 } 223 224 static void a2dp_demo_timer_stop(a2dp_media_sending_context_t * context){ 225 context->time_audio_data_sent = 0; 226 context->acc_num_missed_samples = 0; 227 context->samples_ready = 0; 228 context->streaming = 1; 229 context->sbc_storage_count = 0; 230 context->sbc_ready_to_send = 0; 231 btstack_run_loop_remove_timer(&context->audio_timer); 232 } 233 234 static void a2dp_demo_timer_pause(a2dp_media_sending_context_t * context){ 235 btstack_run_loop_remove_timer(&context->audio_timer); 236 } 237 238 239 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 240 UNUSED(channel); 241 UNUSED(size); 242 uint8_t status; 243 uint8_t local_seid; 244 245 switch (packet_type) { 246 247 case HCI_EVENT_PACKET: 248 switch (hci_event_packet_get_type(packet)) { 249 case HCI_EVENT_A2DP_META: 250 switch (packet[2]){ 251 case A2DP_SUBEVENT_STREAM_ESTABLISHED: 252 status = a2dp_subevent_stream_established_get_status(packet); 253 if (status){ 254 printf("Stream establishment failed: status 0x%02x.\n", status); 255 break; 256 } 257 local_seid = a2dp_subevent_stream_established_get_local_seid(packet); 258 if (local_seid != media_tracker.local_seid){ 259 printf("Stream establishment failed: wrong local seid %d, expected %d.\n", local_seid, media_tracker.local_seid); 260 break; 261 } 262 263 media_tracker.a2dp_cid = a2dp_subevent_stream_established_get_a2dp_cid(packet); 264 printf("Stream established: a2dp cid 0x%02x, local seid %d, remote seid %d.\n", 265 media_tracker.a2dp_cid, media_tracker.local_seid, a2dp_subevent_stream_established_get_remote_seid(packet)); 266 break; 267 268 case A2DP_SUBEVENT_STREAM_STARTED: 269 a2dp_demo_timer_start(&media_tracker); 270 printf("Stream started.\n"); 271 break; 272 273 case A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 274 a2dp_demo_send_media_packet(); 275 break; 276 277 case A2DP_SUBEVENT_STREAM_SUSPENDED: 278 printf("Stream paused.\n"); 279 a2dp_demo_timer_pause(&media_tracker); 280 break; 281 282 case A2DP_SUBEVENT_STREAM_RELEASED: 283 printf("Stream released.\n"); 284 a2dp_demo_timer_stop(&media_tracker); 285 break; 286 default: 287 printf("AVDTP Source demo: event 0x%02x is not implemented\n", packet[2]); 288 break; 289 } 290 break; 291 default: 292 break; 293 } 294 break; 295 default: 296 // other packet type 297 break; 298 } 299 } 300 301 #ifdef HAVE_BTSTACK_STDIN 302 303 static void show_usage(void){ 304 bd_addr_t iut_address; 305 gap_local_bd_addr(iut_address); 306 printf("\n--- Bluetooth A2DP Source Test Console %s ---\n", bd_addr_to_str(iut_address)); 307 printf("c - create connection to addr %s\n", device_addr_string); 308 printf("x - start streaming sine\n"); 309 if (hxcmod_initialized){ 310 printf("z - start streaming '%s'\n", mod_name); 311 } 312 printf("p - pause streaming\n"); 313 printf("C - disconnect\n"); 314 printf("Ctrl-c - exit\n"); 315 printf("---\n"); 316 } 317 318 static void stdin_process(char cmd){ 319 switch (cmd){ 320 case 'c': 321 printf("Creating L2CAP Connection to %s, PSM_AVDTP\n", device_addr_string); 322 a2dp_source_establish_stream(device_addr, media_tracker.local_seid, &media_tracker.a2dp_cid); 323 break; 324 case 'x': 325 printf("Playing sine.\n"); 326 data_source = STREAM_SINE; 327 a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 328 break; 329 case 'z': 330 printf("Playing mod.\n"); 331 data_source = STREAM_MOD; 332 a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 333 break; 334 case 'p': 335 printf("Pause stream.\n"); 336 a2dp_source_pause_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 337 break; 338 case 'C': 339 printf("Disconnect\n"); 340 a2dp_source_disconnect(media_tracker.a2dp_cid); 341 break; 342 default: 343 show_usage(); 344 break; 345 } 346 } 347 #endif 348 349 350 int btstack_main(int argc, const char * argv[]); 351 int btstack_main(int argc, const char * argv[]){ 352 UNUSED(argc); 353 (void)argv; 354 355 l2cap_init(); 356 // Initialize AVDTP Source 357 a2dp_source_init(); 358 a2dp_source_register_packet_handler(&packet_handler); 359 360 media_tracker.local_seid = a2dp_source_create_stream_endpoint(AVDTP_AUDIO, AVDTP_CODEC_SBC, media_sbc_codec_capabilities, sizeof(media_sbc_codec_capabilities), media_sbc_codec_configuration, sizeof(media_sbc_codec_configuration)); 361 362 // Initialize SDP 363 sdp_init(); 364 memset(sdp_a2dp_source_service_buffer, 0, sizeof(sdp_a2dp_source_service_buffer)); 365 a2dp_source_create_sdp_record(sdp_a2dp_source_service_buffer, 0x10002, 1, NULL, NULL); 366 sdp_register_service(sdp_a2dp_source_service_buffer); 367 368 gap_set_local_name(device_name); 369 gap_discoverable_control(1); 370 gap_set_class_of_device(0x200408); 371 372 hxcmod_initialized = hxcmod_init(&mod_context); 373 if (hxcmod_initialized){ 374 hxcmod_setcfg(&mod_context, A2DP_SAMPLE_RATE, 16, 1, 1, 1); 375 hxcmod_load(&mod_context, (void *) &mod_data, mod_len); 376 printf("loaded mod '%s', size %u\n", mod_name, mod_len); 377 } 378 379 #ifdef HAVE_BTSTACK_STDIN 380 // parse human readable Bluetooth address 381 sscanf_bd_addr(device_addr_string, device_addr); 382 btstack_stdin_setup(stdin_process); 383 #endif 384 // turn on! 385 hci_power_control(HCI_POWER_ON); 386 return 0; 387 } 388