/* * Copyright (C) 2016 BlueKitchen GmbH * * 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. * 3. Neither the name of the copyright holders nor the names of * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * 4. Any redistribution, use, or modification is done solely for * personal benefit and not for any commercial purpose or for * monetary gain. * * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH 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 MATTHIAS * RINGWALD 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. * * Please inquire about commercial licensing options at * contact@bluekitchen-gmbh.com * */ #include #include #include #include #include "btstack_config.h" #include "btstack_debug.h" #include "btstack_event.h" #include "btstack_memory.h" #include "btstack_run_loop.h" #include "gap.h" #include "hci.h" #include "hci_cmd.h" #include "hci_dump.h" #include "l2cap.h" #include "btstack_stdin.h" #include "classic/a2dp_source.h" #include "classic/avdtp_source.h" #include "classic/avdtp_util.h" #include "classic/btstack_sbc.h" #include "sbc_encoder.h" #include "hxcmod.h" #include "mods/mod.h" #define NUM_CHANNELS 2 #define A2DP_SAMPLE_RATE 44100 #define BYTES_PER_AUDIO_SAMPLE (2*NUM_CHANNELS) #define FILL_AUDIO_BUFFER_TIMEOUT_MS 10 #ifndef M_PI #define M_PI 3.14159265 #endif #define TABLE_SIZE_441HZ 100 typedef struct { int left_phase; int right_phase; } paTestData; typedef enum { STREAM_SINE, STREAM_MOD } stream_data_source_t; static uint8_t media_sbc_codec_capabilities[] = { (AVDTP_SBC_44100 << 4) | AVDTP_SBC_STEREO, 0xFF,//(AVDTP_SBC_BLOCK_LENGTH_16 << 4) | (AVDTP_SBC_SUBBANDS_8 << 2) | AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS, 2, 53 }; static const int16_t sine_int16[] = { 0, 2057, 4107, 6140, 8149, 10126, 12062, 13952, 15786, 17557, 19260, 20886, 22431, 23886, 25247, 26509, 27666, 28714, 29648, 30466, 31163, 31738, 32187, 32509, 32702, 32767, 32702, 32509, 32187, 31738, 31163, 30466, 29648, 28714, 27666, 26509, 25247, 23886, 22431, 20886, 19260, 17557, 15786, 13952, 12062, 10126, 8149, 6140, 4107, 2057, 0, -2057, -4107, -6140, -8149, -10126, -12062, -13952, -15786, -17557, -19260, -20886, -22431, -23886, -25247, -26509, -27666, -28714, -29648, -30466, -31163, -31738, -32187, -32509, -32702, -32767, -32702, -32509, -32187, -31738, -31163, -30466, -29648, -28714, -27666, -26509, -25247, -23886, -22431, -20886, -19260, -17557, -15786, -13952, -12062, -10126, -8149, -6140, -4107, -2057, }; static char * device_name = "A2DP Source BTstack"; // mac 2011: static bd_addr_t remote = {0x04, 0x0C, 0xCE, 0xE4, 0x85, 0xD3}; // pts: static bd_addr_t remote = {0x00, 0x1B, 0xDC, 0x08, 0x0A, 0xA5}; // mac 2013: static bd_addr_t remote = {0x84, 0x38, 0x35, 0x65, 0xd1, 0x15}; // phone 2013: static bd_addr_t remote = {0xD8, 0xBB, 0x2C, 0xDF, 0xF0, 0xF2}; // minijambox: static bd_addr_t remote = {0x00, 0x21, 0x3c, 0xac, 0xf7, 0x38}; // head phones: static bd_addr_t remote = {0x00, 0x18, 0x09, 0x28, 0x50, 0x18}; // bt dongle: -u 02-04-01 // static bd_addr_t remote = {0x00, 0x15, 0x83, 0x5F, 0x9D, 0x46}; static uint8_t sdp_avdtp_source_service_buffer[150]; static uint8_t media_sbc_codec_configuration[4]; typedef struct { uint16_t a2dp_cid; uint8_t local_seid; uint32_t time_audio_data_sent; // ms uint32_t acc_num_missed_samples; uint32_t samples_ready; btstack_timer_source_t fill_audio_buffer_timer; uint8_t streaming; int max_media_payload_size; uint8_t sbc_storage[1030]; uint16_t sbc_storage_count; uint8_t sbc_ready_to_send; } a2dp_media_sending_context_t; static a2dp_media_sending_context_t media_tracker; static paTestData sin_data; static int hxcmod_initialized = 0; static modcontext mod_context; static tracker_buffer_state trkbuf; static uint8_t local_seid = 0; stream_data_source_t data_source = STREAM_SINE; static btstack_packet_callback_registration_t hci_event_callback_registration; static void a2dp_fill_audio_buffer_timer_start(a2dp_media_sending_context_t * context); static void a2dp_fill_audio_buffer_timer_stop(a2dp_media_sending_context_t * context); static void a2dp_fill_audio_buffer_timer_pause(a2dp_media_sending_context_t * context); static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ UNUSED(channel); UNUSED(size); switch (packet_type) { case HCI_EVENT_PACKET: switch (hci_event_packet_get_type(packet)) { case HCI_EVENT_A2DP_META: switch (packet[2]){ case A2DP_SUBEVENT_STREAM_ESTABLISHED: media_tracker.local_seid = a2dp_subevent_stream_established_get_local_seid(packet); media_tracker.a2dp_cid = a2dp_subevent_stream_established_get_a2dp_cid(packet); printf(" --- application --- A2DP_SUBEVENT_STREAM_ESTABLISHED, a2dp_cid 0x%02x, local seid %d, remote seid %d\n", media_tracker.a2dp_cid, media_tracker.local_seid, a2dp_subevent_stream_established_get_remote_seid(packet)); break; case A2DP_SUBEVENT_STREAM_START_ACCEPTED: if (local_seid != media_tracker.local_seid) break; if (!a2dp_source_stream_endpoint_ready(media_tracker.local_seid)) break; a2dp_fill_audio_buffer_timer_start(&media_tracker); printf(" --- application --- A2DP_SUBEVENT_STREAM_START_ACCEPTED, local seid %d\n", media_tracker.local_seid); break; case A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW:{ if (local_seid != media_tracker.local_seid) break; int num_bytes_in_frame = btstack_sbc_encoder_sbc_buffer_length(); int bytes_in_storage = media_tracker.sbc_storage_count; uint8_t num_frames = bytes_in_storage / num_bytes_in_frame; a2dp_source_stream_send_media_payload(media_tracker.local_seid, media_tracker.sbc_storage, bytes_in_storage, num_frames, 0); media_tracker.sbc_storage_count = 0; media_tracker.sbc_ready_to_send = 0; break; } case A2DP_SUBEVENT_STREAM_SUSPENDED: printf(" --- application --- A2DP_SUBEVENT_STREAM_SUSPENDED, local seid %d\n", media_tracker.local_seid); a2dp_fill_audio_buffer_timer_pause(&media_tracker); break; case A2DP_SUBEVENT_STREAM_RELEASED: printf(" --- application --- A2DP_SUBEVENT_STREAM_RELEASED, local seid %d\n", media_tracker.local_seid); a2dp_fill_audio_buffer_timer_stop(&media_tracker); break; default: printf(" --- application --- not implemented\n"); break; } break; default: break; } break; default: // other packet type break; } } static void show_usage(void){ bd_addr_t iut_address; gap_local_bd_addr(iut_address); printf("\n--- Bluetooth AVDTP SOURCE Test Console %s ---\n", bd_addr_to_str(iut_address)); printf("c - create connection to addr %s\n", bd_addr_to_str(remote)); printf("C - disconnect\n"); printf("x - start streaming sine\n"); if (hxcmod_initialized){ printf("z - start streaming '%s'\n", mod_name); } printf("p - pause streaming\n"); printf("X - stop streaming\n"); printf("Ctrl-c - exit\n"); printf("---\n"); } static void produce_sine_audio(int16_t * pcm_buffer, void *user_data, int num_samples_to_write){ paTestData *data = (paTestData*)user_data; int count; for (count = 0; count < num_samples_to_write ; count++){ pcm_buffer[count * 2] = sine_int16[data->left_phase]; pcm_buffer[count * 2 + 1] = sine_int16[data->right_phase]; data->left_phase += 1; if (data->left_phase >= TABLE_SIZE_441HZ){ data->left_phase -= TABLE_SIZE_441HZ; } data->right_phase += 1; if (data->right_phase >= TABLE_SIZE_441HZ){ data->right_phase -= TABLE_SIZE_441HZ; } } } static void produce_mod_audio(int16_t * pcm_buffer, int num_samples_to_write){ hxcmod_fillbuffer(&mod_context, (unsigned short *) &pcm_buffer[0], num_samples_to_write, &trkbuf); } static void produce_audio(int16_t * pcm_buffer, int num_samples){ switch (data_source){ case STREAM_SINE: produce_sine_audio(pcm_buffer, &sin_data, num_samples); break; case STREAM_MOD: produce_mod_audio(pcm_buffer, num_samples); break; } } static int fill_sbc_audio_buffer(a2dp_media_sending_context_t * context){ // perform sbc encodin int total_num_bytes_read = 0; int num_audio_samples_per_sbc_buffer = btstack_sbc_encoder_num_audio_frames(); while (context->samples_ready >= num_audio_samples_per_sbc_buffer && (context->max_media_payload_size - context->sbc_storage_count) >= btstack_sbc_encoder_sbc_buffer_length()){ uint8_t pcm_frame[256*BYTES_PER_AUDIO_SAMPLE]; produce_audio((int16_t *) pcm_frame, num_audio_samples_per_sbc_buffer); btstack_sbc_encoder_process_data((int16_t *) pcm_frame); uint16_t sbc_frame_size = btstack_sbc_encoder_sbc_buffer_length(); uint8_t * sbc_frame = btstack_sbc_encoder_sbc_buffer(); total_num_bytes_read += num_audio_samples_per_sbc_buffer; memcpy(&context->sbc_storage[context->sbc_storage_count], sbc_frame, sbc_frame_size); context->sbc_storage_count += sbc_frame_size; context->samples_ready -= num_audio_samples_per_sbc_buffer; } return total_num_bytes_read; } static void avdtp_fill_audio_buffer_timeout_handler(btstack_timer_source_t * timer){ a2dp_media_sending_context_t * context = (a2dp_media_sending_context_t *) btstack_run_loop_get_timer_context(timer); btstack_run_loop_set_timer(&context->fill_audio_buffer_timer, FILL_AUDIO_BUFFER_TIMEOUT_MS); btstack_run_loop_add_timer(&context->fill_audio_buffer_timer); uint32_t now = btstack_run_loop_get_time_ms(); uint32_t update_period_ms = FILL_AUDIO_BUFFER_TIMEOUT_MS; if (context->time_audio_data_sent > 0){ update_period_ms = now - context->time_audio_data_sent; } uint32_t num_samples = (update_period_ms * A2DP_SAMPLE_RATE) / 1000; context->acc_num_missed_samples += (update_period_ms * A2DP_SAMPLE_RATE) % 1000; while (context->acc_num_missed_samples >= 1000){ num_samples++; context->acc_num_missed_samples -= 1000; } context->time_audio_data_sent = now; context->samples_ready += num_samples; if (context->sbc_ready_to_send) return; fill_sbc_audio_buffer(context); if ((context->sbc_storage_count + btstack_sbc_encoder_sbc_buffer_length()) > context->max_media_payload_size){ // schedule sending context->sbc_ready_to_send = 1; a2dp_source_stream_endpoint_request_can_send_now(context->local_seid); } } static void a2dp_fill_audio_buffer_timer_start(a2dp_media_sending_context_t * context){ context->max_media_payload_size = a2dp_max_media_payload_size(context->local_seid); context->sbc_storage_count = 0; context->sbc_ready_to_send = 0; context->streaming = 1; btstack_run_loop_remove_timer(&context->fill_audio_buffer_timer); btstack_run_loop_set_timer_handler(&context->fill_audio_buffer_timer, avdtp_fill_audio_buffer_timeout_handler); btstack_run_loop_set_timer_context(&context->fill_audio_buffer_timer, context); btstack_run_loop_set_timer(&context->fill_audio_buffer_timer, FILL_AUDIO_BUFFER_TIMEOUT_MS); btstack_run_loop_add_timer(&context->fill_audio_buffer_timer); } static void a2dp_fill_audio_buffer_timer_stop(a2dp_media_sending_context_t * context){ context->time_audio_data_sent = 0; context->acc_num_missed_samples = 0; context->samples_ready = 0; context->streaming = 1; context->sbc_storage_count = 0; context->sbc_ready_to_send = 0; btstack_run_loop_remove_timer(&context->fill_audio_buffer_timer); } static void a2dp_fill_audio_buffer_timer_pause(a2dp_media_sending_context_t * context){ // context->time_audio_data_sent = 0; btstack_run_loop_remove_timer(&context->fill_audio_buffer_timer); } static void stdin_process(char cmd){ switch (cmd){ case 'c': printf("Creating L2CAP Connection to %s, PSM_AVDTP\n", bd_addr_to_str(remote)); a2dp_source_establish_stream(remote, local_seid); break; case 'C': printf("Disconnect\n"); a2dp_source_disconnect(media_tracker.a2dp_cid); break; case 'x': printf("Stream sine, local seid %d\n", media_tracker.local_seid); data_source = STREAM_SINE; a2dp_source_start_stream(media_tracker.local_seid); break; case 'z': printf("Stream mode, local seid %d\n", media_tracker.local_seid); data_source = STREAM_MOD; a2dp_source_start_stream(media_tracker.local_seid); break; case 'p': printf("Pause stream, local seid %d\n", media_tracker.local_seid); a2dp_source_pause_stream(media_tracker.local_seid); break; case 'X': printf("Close stream, local seid %d\n", media_tracker.local_seid); a2dp_source_release_stream(media_tracker.local_seid); break; default: show_usage(); break; } } int btstack_main(int argc, const char * argv[]); int btstack_main(int argc, const char * argv[]){ UNUSED(argc); (void)argv; /* Register for HCI events */ hci_event_callback_registration.callback = &packet_handler; hci_add_event_handler(&hci_event_callback_registration); l2cap_init(); // Initialize AVDTP Sink a2dp_source_init(); a2dp_source_register_packet_handler(&packet_handler); //#ifndef SMG_BI 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)); // Initialize SDP sdp_init(); memset(sdp_avdtp_source_service_buffer, 0, sizeof(sdp_avdtp_source_service_buffer)); a2dp_source_create_sdp_record(sdp_avdtp_source_service_buffer, 0x10002, 1, NULL, NULL); sdp_register_service(sdp_avdtp_source_service_buffer); gap_set_local_name(device_name); gap_discoverable_control(1); gap_set_class_of_device(0x200408); hxcmod_initialized = hxcmod_init(&mod_context); if (hxcmod_initialized){ hxcmod_setcfg(&mod_context, A2DP_SAMPLE_RATE, 16, 1, 1, 1); hxcmod_load(&mod_context, (void *) &mod_data, mod_len); printf("loaded mod '%s', size %u\n", mod_name, mod_len); } // turn on! hci_power_control(HCI_POWER_ON); btstack_stdin_setup(stdin_process); return 0; }