/* * 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 BLUEKITCHEN * GMBH 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 * */ #define BTSTACK_FILE__ "avdtp_util.c" #include #include #include "classic/avdtp.h" #include "classic/avdtp_util.h" #include "btstack_debug.h" #include "l2cap.h" /* List of AVDTP_SUBEVENTs sorted by packet handler Sink + Source: - AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED - AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED - AVDTP_SUBEVENT_SIGNALING_SEP_FOUND - AVDTP_SUBEVENT_SIGNALING_ACCEPT - AVDTP_SUBEVENT_SIGNALING_REJECT - AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY - AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY - AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY - AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY - AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY - AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY - AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY - AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY - AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE - AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE Source: - AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT Sink or Source based on SEP Type: - AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED - AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED - AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION */ static const char * avdtp_si_name[] = { "ERROR", "AVDTP_SI_DISCOVER", "AVDTP_SI_GET_CAPABILITIES", "AVDTP_SI_SET_CONFIGURATION", "AVDTP_SI_GET_CONFIGURATION", "AVDTP_SI_RECONFIGURE", "AVDTP_SI_OPEN", "AVDTP_SI_START", "AVDTP_SI_CLOSE", "AVDTP_SI_SUSPEND", "AVDTP_SI_ABORT", "AVDTP_SI_SECURITY_CONTROL", "AVDTP_SI_GET_ALL_CAPABILITIES", "AVDTP_SI_DELAY_REPORT" }; const char * avdtp_si2str(uint16_t index){ if ((index <= 0) || (index >= sizeof(avdtp_si_name)/sizeof(avdtp_si_name[0]) )) return avdtp_si_name[0]; return avdtp_si_name[index]; } static const uint32_t usac_sampling_frequency_table[] = { 96000, 88200, 76800, 70560, 64000, 58800, 48000, 44100, 38400, 35280, 32000, 29400, 24000, 22050, 19200, 17640, 16000, 14700, 12800, 12000, 11760, 11025, 9600, 8820, 8000, 7350 }; static const uint8_t usac_sampling_frequency_table_size = sizeof(usac_sampling_frequency_table)/sizeof(uint32_t); static const uint32_t mpeg_sampling_frequency_table[] = { 48000, 44100, 32000, 24000, 22040, 16000 }; static const uint8_t mpeg_sampling_frequency_table_size = sizeof(mpeg_sampling_frequency_table)/sizeof(uint32_t); static const uint32_t sbc_sampling_frequency_table[] = { 48000, 44100, 32000, 16000 }; static const uint8_t sbc_sampling_frequency_table_size = sizeof(sbc_sampling_frequency_table)/sizeof(uint32_t); static const uint32_t atrac_sampling_frequency_table[] = { 48000, 44100 }; static const uint8_t atrac_sampling_frequency_table_size = sizeof(atrac_sampling_frequency_table)/sizeof(uint32_t); static const uint32_t aac_sampling_frequency_table[] = { 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000 }; static const uint8_t aac_sampling_frequency_table_size = sizeof(aac_sampling_frequency_table)/sizeof(uint32_t); static uint32_t avdtp_config_get_sampling_frequency_bitmap_from_table(uint16_t sampling_frequency_hz, const uint32_t * table, uint8_t table_size) { uint8_t i; for (i = 0; i < table_size; i++){ if (sampling_frequency_hz == table[i]){ return 1 << i; } } return 0; } static uint32_t avdtp_config_get_sampling_frequency_from_table(uint16_t sampling_frequency_bitmap, const uint32_t * table, uint8_t table_size) { uint8_t i; for (i = 0; i < table_size; i++){ if (sampling_frequency_bitmap & (1U << i)) { return table[i]; } } return 0; } void avdtp_reset_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ stream_endpoint->media_con_handle = 0; stream_endpoint->l2cap_media_cid = 0; stream_endpoint->l2cap_reporting_cid = 0; stream_endpoint->l2cap_recovery_cid = 0; stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; stream_endpoint->connection = NULL; stream_endpoint->sep.in_use = 0; memset(&stream_endpoint->remote_sep, 0, sizeof(avdtp_sep_t)); stream_endpoint->remote_capabilities_bitmap = 0; memset(&stream_endpoint->remote_capabilities, 0, sizeof(avdtp_capabilities_t)); stream_endpoint->remote_configuration_bitmap = 0; memset(&stream_endpoint->remote_configuration, 0, sizeof(avdtp_capabilities_t)); // temporary SBC config used by A2DP Source memset(stream_endpoint->media_codec_info, 0, 8); stream_endpoint->media_disconnect = 0; stream_endpoint->media_connect = 0; stream_endpoint->start_stream = 0; stream_endpoint->close_stream = 0; stream_endpoint->request_can_send_now = false; stream_endpoint->abort_stream = 0; stream_endpoint->suspend_stream = 0; stream_endpoint->sequence_number = 0; } int get_bit16(uint16_t bitmap, int position){ return (bitmap >> position) & 1; } uint16_t store_bit16(uint16_t bitmap, int position, uint8_t value){ if (value){ bitmap |= 1 << position; } else { bitmap &= ~ (1 << position); } return bitmap; } avdtp_message_type_t avdtp_get_signaling_message_type(uint8_t * packet){ return (avdtp_message_type_t) (packet[0] & 0x03); } // returns 0 if header incomplete int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ int pos = 0; if (size < 2) return 0; signaling_header->transaction_label = packet[pos] >> 4; signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); pos++; memset(signaling_header->command, 0, sizeof(signaling_header->command)); switch (signaling_header->packet_type){ case AVDTP_SINGLE_PACKET: signaling_header->num_packets = 0; signaling_header->offset = 0; signaling_header->size = 0; break; case AVDTP_END_PACKET: signaling_header->num_packets = 0; break; case AVDTP_START_PACKET: signaling_header->num_packets = packet[pos++]; if (pos < 3) return 0; signaling_header->size = 0; signaling_header->offset = 0; break; case AVDTP_CONTINUE_PACKET: if (signaling_header->num_packets <= 0) { log_info(" ERROR: wrong num fragmented packets\n"); break; } signaling_header->num_packets--; break; default: btstack_assert(false); break; } signaling_header->signal_identifier = (avdtp_signal_identifier_t)(packet[pos++] & 0x3f); return pos; } static bool avdtp_is_basic_capability(int service_category){ return (AVDTP_MEDIA_TRANSPORT <= service_category) && (service_category <= AVDTP_MEDIA_CODEC); } int avdtp_pack_service_capabilities(uint8_t *buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category) { UNUSED(size); int i; // pos = 0 reserved for length int pos = 1; switch(category){ case AVDTP_MEDIA_TRANSPORT: case AVDTP_REPORTING: case AVDTP_DELAY_REPORTING: break; case AVDTP_RECOVERY: buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 buffer[pos++] = caps.recovery.maximum_recovery_window_size; buffer[pos++] = caps.recovery.maximum_number_media_packets; break; case AVDTP_CONTENT_PROTECTION: buffer[pos++] = caps.content_protection.cp_type_value_len + 2; big_endian_store_16(buffer, pos, caps.content_protection.cp_type); pos += 2; (void)memcpy(buffer + pos, caps.content_protection.cp_type_value, caps.content_protection.cp_type_value_len); pos += caps.content_protection.cp_type_value_len; break; case AVDTP_HEADER_COMPRESSION: buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); break; case AVDTP_MULTIPLEXING: buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; for (i=0; ierror_code = 0; if ((category == AVDTP_SERVICE_CATEGORY_INVALID_0) || (category > AVDTP_DELAY_REPORTING)){ log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); connection->reject_service_category = category; connection->error_code = AVDTP_ERROR_CODE_BAD_SERV_CATEGORY; return 1; } if (signal_identifier == AVDTP_SI_RECONFIGURE){ if ( (category != AVDTP_CONTENT_PROTECTION) && (category != AVDTP_MEDIA_CODEC)){ log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); connection->reject_service_category = category; connection->error_code = AVDTP_ERROR_CODE_INVALID_CAPABILITIES; return 1; } } switch(category){ case AVDTP_MEDIA_TRANSPORT: if (cap_len != 0){ log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); connection->reject_service_category = category; connection->error_code = AVDTP_ERROR_CODE_BAD_MEDIA_TRANSPORT_FORMAT; return 1; } break; case AVDTP_REPORTING: case AVDTP_DELAY_REPORTING: if (cap_len != 0){ log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); connection->reject_service_category = category; connection->error_code = AVDTP_ERROR_CODE_BAD_LENGTH; return 1; } break; case AVDTP_RECOVERY: if (cap_len != 3){ log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); connection->reject_service_category = category; connection->error_code = AVDTP_ERROR_CODE_BAD_RECOVERY_FORMAT; return 1; } break; case AVDTP_CONTENT_PROTECTION: if (cap_len < 2){ log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); connection->reject_service_category = category; connection->error_code = AVDTP_ERROR_CODE_BAD_CP_FORMAT; return 1; } break; case AVDTP_HEADER_COMPRESSION: // TODO: find error code for bad header compression if (cap_len != 1){ log_info(" ERROR: REJECT CATEGORY, BAD_HEADER_COMPRESSION\n"); connection->reject_service_category = category; connection->error_code = AVDTP_ERROR_CODE_BAD_RECOVERY_FORMAT; return 1; } break; case AVDTP_MULTIPLEXING: break; case AVDTP_MEDIA_CODEC: break; default: break; } return 0; } uint16_t avdtp_unpack_service_capabilities(avdtp_connection_t * connection, avdtp_signal_identifier_t signal_identifier, avdtp_capabilities_t * caps, uint8_t * packet, uint16_t size){ int i; uint16_t registered_service_categories = 0; uint16_t to_process = size; while (to_process >= 2){ avdtp_service_category_t category = (avdtp_service_category_t) packet[0]; uint8_t cap_len = packet[1]; packet += 2; to_process -= 2; if (cap_len > to_process){ connection->reject_service_category = category; connection->error_code = AVDTP_ERROR_CODE_BAD_LENGTH; return 0; } if (avdtp_unpack_service_capabilities_has_errors(connection, signal_identifier, category, cap_len)) return 0; int category_valid = 1; uint8_t * data = packet; uint16_t pos = 0; switch(category){ case AVDTP_RECOVERY: caps->recovery.recovery_type = data[pos++]; caps->recovery.maximum_recovery_window_size = data[pos++]; caps->recovery.maximum_number_media_packets = data[pos++]; break; case AVDTP_CONTENT_PROTECTION: caps->content_protection.cp_type = big_endian_read_16(data, 0); caps->content_protection.cp_type_value_len = cap_len - 2; // connection->reject_service_category = category; // connection->error_code = UNSUPPORTED_CONFIGURATION; // support for content protection goes here break; case AVDTP_HEADER_COMPRESSION: caps->header_compression.back_ch = (data[0] >> 7) & 1; caps->header_compression.media = (data[0] >> 6) & 1; caps->header_compression.recovery = (data[0] >> 5) & 1; break; case AVDTP_MULTIPLEXING: caps->multiplexing_mode.fragmentation = (data[pos++] >> 7) & 1; // read [tsid, tcid] for media, reporting. recovery respectively caps->multiplexing_mode.transport_identifiers_num = 3; for (i=0; imultiplexing_mode.transport_identifiers_num; i++){ caps->multiplexing_mode.transport_session_identifiers[i] = (data[pos++] >> 7) & 1; caps->multiplexing_mode.tcid[i] = (data[pos++] >> 7) & 1; } break; case AVDTP_MEDIA_CODEC: caps->media_codec.media_type = (avdtp_media_type_t)(data[pos++] >> 4); caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(data[pos++]); caps->media_codec.media_codec_information_len = cap_len - 2; caps->media_codec.media_codec_information = &data[pos++]; break; case AVDTP_MEDIA_TRANSPORT: case AVDTP_REPORTING: case AVDTP_DELAY_REPORTING: break; default: category_valid = 0; break; } if (category_valid) { registered_service_categories = store_bit16(registered_service_categories, category, 1); } packet += cap_len; to_process -= cap_len; } return registered_service_categories; } void avdtp_prepare_capabilities(avdtp_signaling_packet_t * signaling_packet, uint8_t transaction_label, uint16_t service_categories, avdtp_capabilities_t capabilities, uint8_t identifier){ if (signaling_packet->offset) return; bool basic_capabilities_only = false; signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; int i; signaling_packet->size = 0; memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); switch (identifier) { case AVDTP_SI_GET_CAPABILITIES: basic_capabilities_only = true; break; case AVDTP_SI_GET_ALL_CAPABILITIES: break; case AVDTP_SI_SET_CONFIGURATION: signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; signaling_packet->message_type = AVDTP_CMD_MSG; break; case AVDTP_SI_RECONFIGURE: signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; signaling_packet->message_type = AVDTP_CMD_MSG; break; default: log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); break; } for (i = AVDTP_MEDIA_TRANSPORT; i <= AVDTP_DELAY_REPORTING; i++){ int registered_category = get_bit16(service_categories, i); if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION)){ // TODO: introduce bitmap of mandatory categories if (i == AVDTP_MEDIA_TRANSPORT){ registered_category = true; } } // AVDTP_SI_GET_CAPABILITIES reports only basic capabilities (i.e., it skips non-basic categories) if (basic_capabilities_only && !avdtp_is_basic_capability(i)){ registered_category = false; } if (registered_category){ // service category signaling_packet->command[signaling_packet->size++] = i; signaling_packet->size += avdtp_pack_service_capabilities(signaling_packet->command + signaling_packet->size, sizeof(signaling_packet->command) - signaling_packet->size, capabilities, (avdtp_service_category_t) i); } } signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; signaling_packet->transaction_label = transaction_label; } int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { int mtu = l2cap_get_remote_mtu_for_local_cid(cid); int data_len = 0; uint16_t offset = signaling_packet->offset; uint16_t pos = 1; if (offset == 0){ if (signaling_packet->size <= (mtu - 2)){ signaling_packet->packet_type = AVDTP_SINGLE_PACKET; out_buffer[pos++] = signaling_packet->signal_identifier; data_len = signaling_packet->size; } else { signaling_packet->packet_type = AVDTP_START_PACKET; out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); out_buffer[pos++] = signaling_packet->signal_identifier; data_len = mtu - 3; signaling_packet->offset = data_len; } } else { int remaining_bytes = signaling_packet->size - offset; if (remaining_bytes <= (mtu - 1)){ signaling_packet->packet_type = AVDTP_END_PACKET; data_len = remaining_bytes; signaling_packet->offset = 0; } else{ signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; data_len = mtu - 1; signaling_packet->offset += data_len; } } out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); (void)memcpy(out_buffer + pos, signaling_packet->command + offset, data_len); pos += data_len; return pos; } void avdtp_signaling_emit_connection_established(uint16_t avdtp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status) { uint8_t event[14]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; little_endian_store_16(event, pos, avdtp_cid); pos += 2; reverse_bd_addr(addr,&event[pos]); pos += 6; little_endian_store_16(event, pos, con_handle); pos += 2; event[pos++] = status; avdtp_emit_sink_and_source(event, pos); } void avdtp_signaling_emit_connection_released(uint16_t avdtp_cid) { uint8_t event[5]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; little_endian_store_16(event, pos, avdtp_cid); pos += 2; avdtp_emit_sink_and_source(event, pos); } void avdtp_signaling_emit_sep(uint16_t avdtp_cid, avdtp_sep_t sep) { uint8_t event[9]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = sep.seid; event[pos++] = sep.in_use; event[pos++] = sep.media_type; event[pos++] = sep.type; avdtp_emit_sink_and_source(event, pos); } void avdtp_signaling_emit_sep_done(uint16_t avdtp_cid) { uint8_t event[5]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE; little_endian_store_16(event, pos, avdtp_cid); pos += 2; avdtp_emit_sink_and_source(event, pos); } void avdtp_signaling_emit_accept(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { uint8_t event[8]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = local_seid; event[pos++] = is_initiator ? 1 : 0; event[pos++] = identifier; avdtp_emit_sink_and_source(event, pos); } void avdtp_signaling_emit_accept_for_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator){ uint8_t event[8]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); pos += 2; event[pos++] = local_seid; event[pos++] = is_initiator ? 1 : 0; event[pos++] = identifier; btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); } void avdtp_signaling_emit_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { uint8_t event[8]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = local_seid; event[pos++] = is_initiator ? 1 : 0; event[pos++] = identifier; avdtp_emit_sink_and_source(event, pos); } void avdtp_signaling_emit_general_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { uint8_t event[8]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = local_seid; event[pos++] = is_initiator ? 1 : 0; event[pos++] = identifier; avdtp_emit_sink_and_source(event, pos); } static inline void avdtp_signaling_emit_capability(uint8_t capability_subevent_id, uint16_t avdtp_cid, uint8_t remote_seid) { uint8_t event[6]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = capability_subevent_id; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = remote_seid; avdtp_emit_sink_and_source(event, pos); } static void avdtp_signaling_emit_media_codec_sbc_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { const uint8_t * media_codec_information = media_codec.media_codec_information; uint8_t event[14]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = remote_seid; event[pos++] = media_codec.media_type; event[pos++] = media_codec_information[0] >> 4; event[pos++] = media_codec_information[0] & 0x0F; event[pos++] = media_codec_information[1] >> 4; event[pos++] = (media_codec_information[1] & 0x0F) >> 2; event[pos++] = media_codec_information[1] & 0x03; event[pos++] = media_codec_information[2]; event[pos++] = media_codec_information[3]; avdtp_emit_sink_and_source(event, pos); } static void avdtp_signaling_emit_media_codec_mpeg_audio_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { const uint8_t * media_codec_information = media_codec.media_codec_information; uint8_t event[15]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CAPABILITY; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = remote_seid; event[pos++] = media_codec.media_type; uint8_t layer_bitmap = media_codec_information[0] >> 5; uint8_t crc = (media_codec_information[0] >> 4) & 0x01; uint8_t channel_mode_bitmap = media_codec_information[0] & 0x07; uint8_t mpf = (media_codec_information[1] >> 6) & 0x01; uint8_t sampling_frequency_bitmap = media_codec_information[1] & 0x3F; uint8_t vbr = (media_codec_information[2] >> 7) & 0x01; uint16_t bit_rate_index_bitmap = ((media_codec_information[3] & 0x3f) << 8) | media_codec.media_codec_information[4]; event[pos++] = layer_bitmap; event[pos++] = crc; event[pos++] = channel_mode_bitmap; event[pos++] = mpf; event[pos++] = sampling_frequency_bitmap; event[pos++] = vbr; little_endian_store_16(event, pos, bit_rate_index_bitmap); // bit rate index pos += 2; avdtp_emit_sink_and_source(event, pos); } static void avdtp_signaling_emit_media_codec_mpeg_aac_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { const uint8_t * media_codec_information = media_codec.media_codec_information; uint8_t event[16]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CAPABILITY; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = remote_seid; event[pos++] = media_codec.media_type; uint8_t object_type_bitmap = media_codec_information[0] >> 1; uint8_t drc = media_codec_information[0] & 0x01; uint16_t sampling_frequency_bitmap = (media_codec_information[1] << 4) | (media_codec_information[2] >> 4); uint8_t channels_bitmap = media_codec_information[2] & 0x0F; uint32_t bit_rate_bitmap = ((media_codec_information[3] & 0x7f) << 16) | (media_codec_information[4] << 8) | media_codec_information[5]; uint8_t vbr = media_codec_information[3] >> 7; event[pos++] = object_type_bitmap; little_endian_store_16(event, pos, sampling_frequency_bitmap); pos += 2; event[pos++] = channels_bitmap; little_endian_store_24(event, pos, bit_rate_bitmap); pos += 3; event[pos++] = vbr; event[pos++] = drc; avdtp_emit_sink_and_source(event, pos); } static void avdtp_signaling_emit_media_codec_atrac_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { const uint8_t * media_codec_information = media_codec.media_codec_information; uint8_t event[16]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; pos++; // set later event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CAPABILITY; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = remote_seid; event[pos++] = media_codec.media_type; uint8_t version = media_codec_information[0] >> 5; uint8_t channel_mode_bitmap = (media_codec_information[0] >> 2) & 0x07; uint8_t sampling_frequency_bitmap = (media_codec_information[1] >> 4) & 0x03; uint8_t vbr = (media_codec_information[1] >> 3) & 0x01; uint16_t bit_rate_index_bitmap = ((media_codec_information[1]) & 0x07) << 16 | (media_codec_information[2] << 8) | media_codec_information[3]; uint16_t maximum_sul = (media_codec_information[4] << 8) | media_codec_information[5]; event[pos++] = version; event[pos++] = channel_mode_bitmap; event[pos++] = sampling_frequency_bitmap; event[pos++] = vbr; little_endian_store_24(event, pos, bit_rate_index_bitmap); pos += 3; little_endian_store_16(event, pos, maximum_sul); pos += 2; event[1] = pos - 2; avdtp_emit_sink_and_source(event, pos); } static void avdtp_signaling_emit_media_codec_mpeg_d_usac_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { const uint8_t * media_codec_information = media_codec.media_codec_information; uint8_t event[18]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; pos++; // set later event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_D_USAC_CAPABILITY; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = remote_seid; event[pos++] = media_codec.media_type; uint32_t sampling_frequency_bitmap = ((media_codec_information[0] & 0x3F) << 20) | (media_codec_information[1] << 12) | (media_codec_information[2] << 4) | (media_codec_information[3] >> 4); uint8_t channels_bitmap = (media_codec_information[3] >> 2) & 0x03; uint8_t vbr = (media_codec_information[4] >> 7) & 0x01; uint16_t bit_rate_index_bitmap = ((media_codec_information[4]) & 0xEF) << 16 | (media_codec_information[5] << 8) | media_codec_information[6]; event[pos++] = media_codec_information[0] >> 6; little_endian_store_32(event, pos, sampling_frequency_bitmap); pos += 4; event[pos++] = channels_bitmap; event[pos++] = sampling_frequency_bitmap; event[pos++] = vbr; little_endian_store_24(event, pos, bit_rate_index_bitmap); pos += 3; event[1] = pos - 2; avdtp_emit_sink_and_source(event, pos); } static void avdtp_signaling_emit_media_codec_other_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec) { uint8_t event[AVDTP_MAX_MEDIA_CODEC_INFORMATION_LENGTH + 11]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; pos++; // set later event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = remote_seid; event[pos++] = media_codec.media_type; little_endian_store_16(event, pos, media_codec.media_codec_type); pos += 2; little_endian_store_16(event, pos, media_codec.media_codec_information_len); pos += 2; uint32_t media_codec_info_len = btstack_min(media_codec.media_codec_information_len, AVDTP_MAX_MEDIA_CODEC_INFORMATION_LENGTH); (void)memcpy(event + pos, media_codec.media_codec_information, media_codec_info_len); pos += media_codec_info_len; event[1] = pos - 2; avdtp_emit_sink_and_source(event, pos); } static void avdtp_signaling_emit_media_transport_capability(uint16_t avdtp_cid, uint8_t remote_seid) { avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, avdtp_cid, remote_seid); } static void avdtp_signaling_emit_reporting_capability(uint16_t avdtp_cid, uint8_t remote_seid) { avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, avdtp_cid, remote_seid); } static void avdtp_signaling_emit_delay_reporting_capability(uint16_t avdtp_cid, uint8_t remote_seid) { avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, avdtp_cid, remote_seid); } static void avdtp_signaling_emit_recovery_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_recovery_capabilities_t *recovery) { uint8_t event[9]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = remote_seid; event[pos++] = recovery->recovery_type; event[pos++] = recovery->maximum_recovery_window_size; event[pos++] = recovery->maximum_number_media_packets; avdtp_emit_sink_and_source(event, pos); } #define MAX_CONTENT_PROTECTION_VALUE_LEN 32 static void avdtp_signaling_emit_content_protection_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_content_protection_t *content_protection) { uint8_t event[10 + MAX_CONTENT_PROTECTION_VALUE_LEN]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; pos++; // set later event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = remote_seid; little_endian_store_16(event, pos, content_protection->cp_type); pos += 2; // drop cp protection value if longer than expected if (content_protection->cp_type_value_len <= MAX_CONTENT_PROTECTION_VALUE_LEN){ little_endian_store_16(event, pos, content_protection->cp_type_value_len); pos += 2; (void)memcpy(event + pos, content_protection->cp_type_value, content_protection->cp_type_value_len); pos += content_protection->cp_type_value_len; } else { little_endian_store_16(event, pos, 0); pos += 2; } event[1] = pos - 2; avdtp_emit_sink_and_source(event, pos); } static void avdtp_signaling_emit_header_compression_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_header_compression_capabilities_t *header_compression) { uint8_t event[9]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = remote_seid; event[pos++] = header_compression->back_ch; event[pos++] = header_compression->media; event[pos++] = header_compression->recovery; avdtp_emit_sink_and_source(event, pos); } static void avdtp_signaling_emit_content_multiplexing_capability(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_multiplexing_mode_capabilities_t *multiplexing_mode) { uint8_t event[14]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = remote_seid; event[pos++] = multiplexing_mode->fragmentation; event[pos++] = multiplexing_mode->transport_identifiers_num; int i; for (i = 0; i < 3; i++){ event[pos++] = multiplexing_mode->transport_session_identifiers[i]; } for (i = 0; i < 3; i++){ event[pos++] = multiplexing_mode->tcid[i]; } avdtp_emit_sink_and_source(event, pos); } static void avdtp_signaling_emit_capability_done(uint16_t avdtp_cid, uint8_t remote_seid) { uint8_t event[6]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = remote_seid; avdtp_emit_sink_and_source(event, pos); } static void avdtp_signaling_emit_media_codec_capability(uint16_t avdtp_cid, uint8_t remote_seid, adtvp_media_codec_capabilities_t media_codec){ switch (media_codec.media_codec_type){ case AVDTP_CODEC_SBC: avdtp_signaling_emit_media_codec_sbc_capability(avdtp_cid, remote_seid, media_codec); break; case AVDTP_CODEC_MPEG_1_2_AUDIO: avdtp_signaling_emit_media_codec_mpeg_audio_capability(avdtp_cid, remote_seid, media_codec); break; case AVDTP_CODEC_MPEG_2_4_AAC: avdtp_signaling_emit_media_codec_mpeg_aac_capability(avdtp_cid, remote_seid, media_codec); break; case AVDTP_CODEC_ATRAC_FAMILY: avdtp_signaling_emit_media_codec_atrac_capability(avdtp_cid, remote_seid, media_codec); break; case AVDTP_CODEC_MPEG_D_USAC: avdtp_signaling_emit_media_codec_mpeg_d_usac_capability(avdtp_cid, remote_seid, media_codec); break; default: avdtp_signaling_emit_media_codec_other_capability(avdtp_cid, remote_seid, media_codec); break; } } // emit events for all capabilities incl. final done event void avdtp_signaling_emit_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_capabilities_t *capabilities, uint16_t registered_service_categories) { if (get_bit16(registered_service_categories, AVDTP_MEDIA_CODEC)){ avdtp_signaling_emit_media_codec_capability(avdtp_cid, remote_seid, capabilities->media_codec); } if (get_bit16(registered_service_categories, AVDTP_MEDIA_TRANSPORT)){ avdtp_signaling_emit_media_transport_capability(avdtp_cid, remote_seid); } if (get_bit16(registered_service_categories, AVDTP_REPORTING)){ avdtp_signaling_emit_reporting_capability(avdtp_cid, remote_seid); } if (get_bit16(registered_service_categories, AVDTP_RECOVERY)){ avdtp_signaling_emit_recovery_capability(avdtp_cid, remote_seid, &capabilities->recovery); } if (get_bit16(registered_service_categories, AVDTP_CONTENT_PROTECTION)){ avdtp_signaling_emit_content_protection_capability(avdtp_cid, remote_seid, &capabilities->content_protection); } if (get_bit16(registered_service_categories, AVDTP_HEADER_COMPRESSION)){ avdtp_signaling_emit_header_compression_capability(avdtp_cid, remote_seid, &capabilities->header_compression); } if (get_bit16(registered_service_categories, AVDTP_MULTIPLEXING)){ avdtp_signaling_emit_content_multiplexing_capability(avdtp_cid, remote_seid, &capabilities->multiplexing_mode); } if (get_bit16(registered_service_categories, AVDTP_DELAY_REPORTING)){ avdtp_signaling_emit_delay_reporting_capability(avdtp_cid, remote_seid); } avdtp_signaling_emit_capability_done(avdtp_cid, remote_seid); } static uint16_t avdtp_signaling_setup_media_codec_sbc_config_event(uint8_t *event, uint16_t size, const avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t reconfigure, const uint8_t *media_codec_information) { btstack_assert(size >= AVDTP_MEDIA_CONFIG_SBC_EVENT_LEN); uint8_t local_seid = avdtp_local_seid(stream_endpoint); uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = AVDTP_MEDIA_CONFIG_SBC_EVENT_LEN - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = local_seid; event[pos++] = remote_seid; event[pos++] = reconfigure; event[pos++] = AVDTP_CODEC_SBC; uint8_t sampling_frequency_bitmap = media_codec_information[0] >> 4; uint8_t channel_mode_bitmap = media_codec_information[0] & 0x0F; uint8_t block_length_bitmap = media_codec_information[1] >> 4; uint8_t subbands_bitmap = (media_codec_information[1] & 0x0F) >> 2; uint8_t num_channels = 0; avdtp_channel_mode_t channel_mode; if (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO){ channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; num_channels = 2; } else if (channel_mode_bitmap & AVDTP_SBC_STEREO){ channel_mode = AVDTP_CHANNEL_MODE_STEREO; num_channels = 2; } else if (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL){ channel_mode = AVDTP_CHANNEL_MODE_DUAL_CHANNEL; num_channels = 2; } else { channel_mode = AVDTP_CHANNEL_MODE_MONO; num_channels = 1; } uint16_t sampling_frequency = 0; if (sampling_frequency_bitmap & AVDTP_SBC_48000) { sampling_frequency = 48000; } else if (sampling_frequency_bitmap & AVDTP_SBC_44100) { sampling_frequency = 44100; } else if (sampling_frequency_bitmap & AVDTP_SBC_32000) { sampling_frequency = 32000; } else if (sampling_frequency_bitmap & AVDTP_SBC_16000) { sampling_frequency = 16000; } uint8_t subbands = 0; if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ subbands = 8; } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ subbands = 4; } uint8_t block_length = 0; if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ block_length = 16; } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ block_length = 12; } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ block_length = 8; } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ block_length = 4; } little_endian_store_16(event, pos, sampling_frequency); pos += 2; event[pos++] = (uint8_t) channel_mode; event[pos++] = num_channels; event[pos++] = block_length; event[pos++] = subbands; event[pos++] = media_codec_information[1] & 0x03; event[pos++] = media_codec_information[2]; event[pos++] = media_codec_information[3]; btstack_assert(pos == AVDTP_MEDIA_CONFIG_SBC_EVENT_LEN); return pos; } static uint16_t avdtp_signaling_setup_media_codec_mpeg_audio_config_event(uint8_t *event, uint16_t size, const avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t reconfigure, const uint8_t *media_codec_information) { btstack_assert(size >= AVDTP_MEDIA_CONFIG_MPEG_AUDIO_EVENT_LEN); uint8_t local_seid = avdtp_local_seid(stream_endpoint); uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); uint16_t pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = AVDTP_MEDIA_CONFIG_MPEG_AUDIO_EVENT_LEN - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CONFIGURATION; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = local_seid; event[pos++] = remote_seid; event[pos++] = reconfigure; event[pos++] = AVDTP_CODEC_MPEG_1_2_AUDIO; uint8_t layer_bitmap = media_codec_information[0] >> 5; uint8_t crc = (media_codec_information[0] >> 4) & 0x01; uint8_t channel_mode_bitmap = (media_codec_information[0] & 0x07); uint8_t mpf = (media_codec_information[1] >> 6) & 0x01; uint8_t sampling_frequency_bitmap = (media_codec_information[1] & 0x3F); uint8_t vbr = (media_codec_information[2] >> 7) & 0x01; uint16_t bit_rate_index_bitmap = ((media_codec_information[2] & 0x3f) << 8) | media_codec_information[3]; uint8_t layer = 0; if (layer_bitmap & 0x04){ layer = AVDTP_MPEG_LAYER_1; } else if (layer_bitmap & 0x02){ layer = AVDTP_MPEG_LAYER_2; } else if (layer_bitmap & 0x01){ layer = AVDTP_MPEG_LAYER_3; } uint8_t num_channels = 0; avdtp_channel_mode_t channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; if (channel_mode_bitmap & 0x08){ num_channels = 1; channel_mode = AVDTP_CHANNEL_MODE_MONO; } else if (channel_mode_bitmap & 0x04){ num_channels = 2; channel_mode = AVDTP_CHANNEL_MODE_DUAL_CHANNEL; } else if (channel_mode_bitmap & 0x02){ num_channels = 2; channel_mode = AVDTP_CHANNEL_MODE_STEREO; } else if (channel_mode_bitmap & 0x02){ num_channels = 2; channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; } uint16_t sampling_frequency = 0; if (sampling_frequency_bitmap & 0x01) { sampling_frequency = 48000; } else if (sampling_frequency_bitmap & 0x02) { sampling_frequency = 44100; } else if (sampling_frequency_bitmap & 0x04) { sampling_frequency = 32000; } else if (sampling_frequency_bitmap & 0x08) { sampling_frequency = 24000; } else if (sampling_frequency_bitmap & 0x10) { sampling_frequency = 22050; } else if (sampling_frequency_bitmap & 0x20) { sampling_frequency = 16000; } uint8_t bitrate_index = 0; uint8_t i; for (i=0;i<14;i++){ if (bit_rate_index_bitmap & (1U << i)) { bitrate_index = i; } } event[pos++] = (uint8_t) layer; event[pos++] = crc; event[pos++] = (uint8_t) channel_mode; event[pos++] = num_channels; event[pos++] = mpf; little_endian_store_16(event, pos, sampling_frequency); pos += 2; event[pos++] = vbr; event[pos++] = bitrate_index; btstack_assert(pos == AVDTP_MEDIA_CONFIG_MPEG_AUDIO_EVENT_LEN); return pos; } static uint16_t avdtp_signaling_setup_media_codec_mpec_aac_config_event(uint8_t *event, uint16_t size, const avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t reconfigure, const uint8_t *media_codec_information) { btstack_assert(size >= AVDTP_MEDIA_CONFIG_MPEG_AAC_EVENT_LEN); uint8_t local_seid = avdtp_local_seid(stream_endpoint); uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); uint16_t pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = AVDTP_MEDIA_CONFIG_MPEG_AAC_EVENT_LEN - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CONFIGURATION; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = local_seid; event[pos++] = remote_seid; event[pos++] = reconfigure; event[pos++] =AVDTP_CODEC_MPEG_2_4_AAC; uint8_t object_type_bitmap = media_codec_information[0] >> 1; uint8_t drc = media_codec_information[0] & 0x01; uint16_t sampling_frequency_bitmap = (media_codec_information[1] << 4) | (media_codec_information[2] >> 4); uint8_t channels_bitmap = media_codec_information[2] & 0x0F; uint8_t vbr = media_codec_information[3] >> 7; uint32_t bit_rate = ((media_codec_information[3] & 0x7f) << 16) | (media_codec_information[4] << 8) | media_codec_information[5]; uint8_t object_type = 0; if (object_type_bitmap & 0x01){ object_type = AVDTP_AAC_MPEG4_HE_AAC_ELDv2; } else if (object_type_bitmap & 0x02){ object_type = AVDTP_AAC_MPEG4_HE_AACv2; } else if (object_type_bitmap & 0x04){ object_type = AVDTP_AAC_MPEG4_HE_AAC; } else if (object_type_bitmap & 0x08){ object_type = AVDTP_AAC_MPEG4_SCALABLE; } else if (object_type_bitmap & 0x10){ object_type = AVDTP_AAC_MPEG4_LTP; } else if (object_type_bitmap & 0x20){ object_type = AVDTP_AAC_MPEG4_LC; } else if (object_type_bitmap & 0x40){ object_type = AVDTP_AAC_MPEG2_LC; } uint32_t sampling_frequency = avdtp_config_get_sampling_frequency_from_table(sampling_frequency_bitmap, aac_sampling_frequency_table, aac_sampling_frequency_table_size); uint8_t num_channels = 0; if (channels_bitmap & 0x08){ num_channels = 1; } else if (channels_bitmap & 0x04){ num_channels = 2; } else if (channels_bitmap & 0x02){ num_channels = 6; } else if (channels_bitmap & 0x01){ num_channels = 8; } event[pos++] = object_type; little_endian_store_24(event, pos, sampling_frequency); pos += 3; event[pos++] = num_channels; little_endian_store_24(event, pos, bit_rate); pos += 3; event[pos++] = vbr; event[pos++] = drc; btstack_assert(AVDTP_MEDIA_CONFIG_MPEG_AAC_EVENT_LEN == pos); return pos; } static uint16_t avdtp_signaling_setup_media_codec_mpegd_config_event(uint8_t *event, uint16_t size, const avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t reconfigure, const uint8_t *media_codec_information) { btstack_assert(size >= AVDTP_MEDIA_CONFIG_MPEG_D_USAC_EVENT_LEN); uint8_t local_seid = avdtp_local_seid(stream_endpoint); uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); uint16_t pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = AVDTP_MEDIA_CONFIG_MPEG_D_USAC_EVENT_LEN - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_D_USAC_CONFIGURATION; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = local_seid; event[pos++] = remote_seid; event[pos++] = reconfigure; event[pos++] = AVDTP_CODEC_MPEG_D_USAC; uint8_t object_type_bitmap = media_codec_information[0] >> 6; uint32_t sampling_frequency_bitmap = ((media_codec_information[0] & 0x3F) << 20) | (media_codec_information[1] << 12) | (media_codec_information[2] << 4) | (media_codec_information[3] >> 4); uint8_t channels_bitmap = (media_codec_information[3] >> 2) & 0x03; uint8_t vbr = (media_codec_information[4] >> 7) & 0x01; uint32_t bit_rate = ((media_codec_information[3] & 0x7f) << 16) | (media_codec_information[4] << 8) | media_codec_information[5]; uint8_t object_type = 0; if (object_type_bitmap & 0x10){ object_type = AVDTP_USAC_OBJECT_TYPE_MPEG_D_DRC; } else { object_type = AVDTP_USAC_OBJECT_TYPE_RFU; } uint32_t sampling_frequency = avdtp_config_get_sampling_frequency_from_table(sampling_frequency_bitmap, usac_sampling_frequency_table, usac_sampling_frequency_table_size ); uint8_t num_channels = 0; if (channels_bitmap & 0x02){ num_channels = 1; } else if (channels_bitmap & 0x01){ num_channels = 2; } event[pos++] = object_type; little_endian_store_24(event, pos, sampling_frequency); pos += 3; event[pos++] = num_channels; event[pos++] = vbr; little_endian_store_24(event, pos, bit_rate); pos += 3; btstack_assert(AVDTP_MEDIA_CONFIG_MPEG_D_USAC_EVENT_LEN == pos); return pos; } static uint16_t avdtp_signaling_setup_media_codec_atrac_config_event(uint8_t *event, uint16_t size, const avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t reconfigure, const uint8_t *media_codec_information) { btstack_assert(size >= AVDTP_MEDIA_CONFIG_ATRAC_EVENT_LEN); uint8_t local_seid = avdtp_local_seid(stream_endpoint); uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); uint16_t pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = AVDTP_MEDIA_CONFIG_ATRAC_EVENT_LEN - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CONFIGURATION; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = local_seid; event[pos++] = remote_seid; event[pos++] = reconfigure; event[pos++] = AVDTP_CODEC_ATRAC_FAMILY; avdtp_atrac_version_t version = (avdtp_atrac_version_t) (media_codec_information[0] >> 5); uint8_t channel_mode_bitmap = (media_codec_information[0] >> 2) & 0x07; uint16_t sampling_frequency_bitmap = (media_codec_information[1] >> 4) & 0x03; uint8_t vbr = (media_codec_information[1] >> 3) & 0x01; uint16_t bit_rate_index_bitmap = ((media_codec_information[1]) & 0x07) << 16 | (media_codec_information[2] << 8) | media_codec_information[3]; uint16_t maximum_sul = (media_codec_information[4] << 8) | media_codec_information[5]; uint8_t num_channels = 0; avdtp_channel_mode_t channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; if (channel_mode_bitmap & 0x04){ num_channels = 1; channel_mode = AVDTP_CHANNEL_MODE_MONO; } else if (channel_mode_bitmap & 0x02){ num_channels = 2; channel_mode = AVDTP_CHANNEL_MODE_DUAL_CHANNEL; } else if (channel_mode_bitmap & 0x01){ num_channels = 2; channel_mode = AVDTP_CHANNEL_MODE_JOINT_STEREO; } uint16_t sampling_frequency = 0; if (sampling_frequency_bitmap & 0x02){ sampling_frequency = 44100; } else if (sampling_frequency_bitmap & 0x01){ sampling_frequency = 48000; } // bit 0 = index 0x18, bit 19 = index 0 uint8_t bit_rate_index = 0; uint8_t i; for (i=0;i <= 19;i++){ if (bit_rate_index_bitmap & (1U << i)) { bit_rate_index = 18 - i; } } event[pos++] = (uint8_t) version; event[pos++] = (uint8_t) channel_mode; event[pos++] = num_channels; little_endian_store_16(event, pos, sampling_frequency); pos += 2; event[pos++] = vbr; event[pos++] = bit_rate_index; little_endian_store_16(event, pos, maximum_sul); pos += 2; btstack_assert(pos == AVDTP_MEDIA_CONFIG_ATRAC_EVENT_LEN); return pos; } static uint16_t avdtp_signaling_setup_media_codec_other_config_event(uint8_t *event, uint16_t size, const avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t reconfigure, const adtvp_media_codec_capabilities_t *media_codec) { btstack_assert(size >= AVDTP_MEDIA_CONFIG_OTHER_EVENT_LEN); uint8_t local_seid = avdtp_local_seid(stream_endpoint); uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); uint16_t pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; pos++; // set later event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = local_seid; event[pos++] = remote_seid; event[pos++] = reconfigure; event[pos++] = media_codec->media_type; little_endian_store_16(event, pos, media_codec->media_codec_type); pos += 2; little_endian_store_16(event, pos, media_codec->media_codec_information_len); pos += 2; btstack_assert(pos == 13); uint16_t media_codec_len = btstack_min(AVDTP_MAX_MEDIA_CODEC_INFORMATION_LENGTH, media_codec->media_codec_information_len); (void)memcpy(event + pos, media_codec->media_codec_information, media_codec_len); pos += media_codec_len; event[1] = pos - 2; return pos; } void avdtp_signaling_emit_delay(uint16_t avdtp_cid, uint8_t local_seid, uint16_t delay) { uint8_t event[8]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = local_seid; little_endian_store_16(event, pos, delay); pos += 2; avdtp_emit_source(event, pos); } uint16_t avdtp_setup_media_codec_config_event(uint8_t *event, uint16_t size, const avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t reconfigure, const adtvp_media_codec_capabilities_t * media_codec) { switch (media_codec->media_codec_type){ case AVDTP_CODEC_SBC: return avdtp_signaling_setup_media_codec_sbc_config_event(event, size, stream_endpoint, avdtp_cid, reconfigure, media_codec->media_codec_information); case AVDTP_CODEC_MPEG_1_2_AUDIO: return avdtp_signaling_setup_media_codec_mpeg_audio_config_event(event, size, stream_endpoint, avdtp_cid, reconfigure, media_codec->media_codec_information); case AVDTP_CODEC_MPEG_2_4_AAC: return avdtp_signaling_setup_media_codec_mpec_aac_config_event(event, size, stream_endpoint, avdtp_cid, reconfigure, media_codec->media_codec_information); case AVDTP_CODEC_ATRAC_FAMILY: return avdtp_signaling_setup_media_codec_atrac_config_event(event, size, stream_endpoint, avdtp_cid, reconfigure, media_codec->media_codec_information); case AVDTP_CODEC_MPEG_D_USAC: return avdtp_signaling_setup_media_codec_mpegd_config_event(event, size, stream_endpoint, avdtp_cid, reconfigure, media_codec->media_codec_information); default: return avdtp_signaling_setup_media_codec_other_config_event(event, size, stream_endpoint, avdtp_cid, reconfigure, media_codec); } } void avdtp_signaling_emit_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t reconfigure, avdtp_capabilities_t *configuration, uint16_t configured_service_categories) { if (get_bit16(configured_service_categories, AVDTP_MEDIA_CODEC)){ uint16_t pos = 0; // assume MEDIA_CONFIG_OTHER_EVENT_LEN is larger than all other events uint8_t event[AVDTP_MEDIA_CONFIG_OTHER_EVENT_LEN]; pos = avdtp_setup_media_codec_config_event(event, sizeof(event), stream_endpoint, avdtp_cid, reconfigure, &configuration->media_codec); btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); } } void avdtp_streaming_emit_connection_established(avdtp_stream_endpoint_t *stream_endpoint, uint8_t status) { uint8_t event[14]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); pos += 2; reverse_bd_addr(stream_endpoint->connection->remote_addr, &event[pos]); pos += 6; event[pos++] = avdtp_local_seid(stream_endpoint); event[pos++] = avdtp_remote_seid(stream_endpoint); event[pos++] = status; btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); } void avdtp_streaming_emit_connection_released(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t local_seid) { uint8_t event[6]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED; little_endian_store_16(event, pos, avdtp_cid); pos += 2; event[pos++] = local_seid; btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); } void avdtp_streaming_emit_can_send_media_packet_now(avdtp_stream_endpoint_t *stream_endpoint, uint16_t sequence_number) { uint8_t event[8]; int pos = 0; event[pos++] = HCI_EVENT_AVDTP_META; event[pos++] = sizeof(event) - 2; event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); pos += 2; event[pos++] = avdtp_local_seid(stream_endpoint); little_endian_store_16(event, pos, sequence_number); pos += 2; event[1] = pos - 2; btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); } uint8_t avdtp_request_can_send_now_acceptor(avdtp_connection_t *connection) { if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; connection->wait_to_send_acceptor = true; l2cap_request_can_send_now_event(connection->l2cap_signaling_cid); return ERROR_CODE_SUCCESS; } uint8_t avdtp_request_can_send_now_initiator(avdtp_connection_t *connection) { if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; connection->wait_to_send_initiator = true; l2cap_request_can_send_now_event(connection->l2cap_signaling_cid); return ERROR_CODE_SUCCESS; } uint8_t avdtp_local_seid(const avdtp_stream_endpoint_t * stream_endpoint){ if (!stream_endpoint) return 0; return stream_endpoint->sep.seid; } uint8_t avdtp_remote_seid(const avdtp_stream_endpoint_t * stream_endpoint){ if (!stream_endpoint) return AVDTP_INVALID_SEP_SEID; return stream_endpoint->remote_sep.seid; } // helper to set/get configuration uint8_t avdtp_config_sbc_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz){ uint8_t sampling_frequency_bitmap = (uint8_t)avdtp_config_get_sampling_frequency_bitmap_from_table(sampling_frequency_hz, sbc_sampling_frequency_table, sbc_sampling_frequency_table_size); if (sampling_frequency_bitmap == 0){ return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } config[0] = (config[0] & 0x0f) | (uint8_t)(sampling_frequency_bitmap << 4); return ERROR_CODE_SUCCESS; } uint8_t avdtp_config_sbc_store(uint8_t * config, const avdtp_configuration_sbc_t * configuration){ if (configuration->channel_mode > AVDTP_CHANNEL_MODE_JOINT_STEREO){ return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } if (configuration->allocation_method > AVDTP_SBC_ALLOCATION_METHOD_SNR){ return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } switch ((avdtp_sbc_block_length_t)configuration->block_length){ case AVDTP_SBC_BLOCK_LENGTH_4: case AVDTP_SBC_BLOCK_LENGTH_8: case AVDTP_SBC_BLOCK_LENGTH_12: case AVDTP_SBC_BLOCK_LENGTH_16: break; default: return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } switch ((avdtp_sbc_subbands_t)configuration->subbands){ case AVDTP_SBC_SUBBANDS_4: case AVDTP_SBC_SUBBANDS_8: break; default: return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } if ((configuration->min_bitpool_value < 2) || (configuration->min_bitpool_value > 250) || (configuration->min_bitpool_value > configuration->max_bitpool_value)){ return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } if ((configuration->max_bitpool_value < 2) || (configuration->max_bitpool_value > 250)){ return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } config[0] = 1 << (3 - (configuration->channel_mode - AVDTP_CHANNEL_MODE_MONO)); config[1] = (configuration->block_length << 4) | (configuration->subbands << 2) | configuration->allocation_method; config[2] = configuration->min_bitpool_value; config[3] = configuration->max_bitpool_value; return avdtp_config_sbc_set_sampling_frequency(config, configuration->sampling_frequency); } uint8_t avdtp_config_mpeg_audio_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz) { uint8_t sampling_frequency_bitmap = (uint8_t)avdtp_config_get_sampling_frequency_bitmap_from_table(sampling_frequency_hz, mpeg_sampling_frequency_table, mpeg_sampling_frequency_table_size); if (sampling_frequency_bitmap == 0){ return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } config[1] = (config[1] & 0xE0) | sampling_frequency_bitmap; return ERROR_CODE_SUCCESS; } uint8_t avdtp_config_mpeg_audio_store(uint8_t * config, const avdtp_configuration_mpeg_audio_t * configuration){ if (configuration->layer > AVDTP_MPEG_LAYER_3){ return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } if (configuration->channel_mode > AVDTP_CHANNEL_MODE_JOINT_STEREO){ return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } uint16_t bit_rate_mask = 1 << configuration->bit_rate_index; if (bit_rate_mask == 0){ return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } config[0] = (1 << (7 - (configuration->layer - AVDTP_MPEG_LAYER_1))) | ((configuration->crc & 0x01) << 4) | (1 << (configuration->channel_mode - AVDTP_CHANNEL_MODE_MONO)); config[1] = ((configuration->media_payload_format & 0x01) << 6) ; config[2] = ((configuration->vbr & 0x01) << 7) | ((bit_rate_mask >> 7) & 0x3f); config[3] = bit_rate_mask & 0xff; return avdtp_config_mpeg_audio_set_sampling_frequency(config, configuration->sampling_frequency); } uint8_t avdtp_config_mpeg_aac_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz) { uint16_t sampling_frequency_bitmap = (uint16_t)avdtp_config_get_sampling_frequency_bitmap_from_table(sampling_frequency_hz, aac_sampling_frequency_table, aac_sampling_frequency_table_size); if (sampling_frequency_bitmap == 0){ return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } config[1] = sampling_frequency_bitmap >> 4; config[2] = ((sampling_frequency_bitmap & 0x0f) << 4) | (config[2] & 0x0f); return ERROR_CODE_SUCCESS; } uint8_t avdtp_config_mpeg_aac_store(uint8_t * config, const avdtp_configuration_mpeg_aac_t * configuration) { config[0] = (1 << (7 -(configuration->object_type - AVDTP_AAC_MPEG2_LC))) | (configuration->drc?1u:0u); uint8_t channels_bitmap = 0; switch (configuration->channels){ case 1: channels_bitmap = 0x08; break; case 2: channels_bitmap = 0x04; break; case 6: channels_bitmap = 0x02; break; case 8: channels_bitmap = 0x01; break; default: return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } config[2] = channels_bitmap; config[3] = ((configuration->vbr & 0x01) << 7) | ((configuration->bit_rate >> 16) & 0x7f); config[4] = (configuration->bit_rate >> 8) & 0xff; config[5] = configuration->bit_rate & 0xff; return avdtp_config_mpeg_aac_set_sampling_frequency(config, configuration->sampling_frequency); } uint8_t avdtp_config_atrac_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz) { uint8_t sampling_frequency_bitmap = (uint8_t)avdtp_config_get_sampling_frequency_bitmap_from_table(sampling_frequency_hz, atrac_sampling_frequency_table, atrac_sampling_frequency_table_size); if (sampling_frequency_bitmap == 0){ return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } config[1] = (config[1] & 0xCF) | (uint8_t)(sampling_frequency_bitmap << 4); return ERROR_CODE_SUCCESS; } uint8_t avdtp_config_atrac_store(uint8_t * config, const avdtp_configuration_atrac_t * configuration){ uint8_t channel_mode_bitmap = 0; switch (configuration->channel_mode){ case AVDTP_CHANNEL_MODE_MONO: channel_mode_bitmap = 4; break; case AVDTP_CHANNEL_MODE_DUAL_CHANNEL: channel_mode_bitmap = 2; break; case AVDTP_CHANNEL_MODE_JOINT_STEREO: channel_mode_bitmap = 1; break; default: return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } config[0] = ((configuration->version - AVDTP_ATRAC_VERSION_1 + 1) << 5) | (channel_mode_bitmap << 2); uint32_t bit_rate_bitmap = 1 << (0x18 - configuration->bit_rate_index); config[1] = ((configuration->vbr & 0x01) << 3) | ((bit_rate_bitmap >> 16) & 0x07); config[2] = (bit_rate_bitmap >> 8) & 0xff; config[3] = bit_rate_bitmap & 0xff; config[4] = configuration->maximum_sul >> 8; config[5] = configuration->maximum_sul & 0xff; config[6] = 0; return avdtp_config_atrac_set_sampling_frequency(config, configuration->sampling_frequency); } uint8_t avdtp_config_mpegd_usac_set_sampling_frequency(uint8_t * config, uint16_t sampling_frequency_hz) { uint32_t sampling_frequency_bitmap = avdtp_config_get_sampling_frequency_bitmap_from_table(sampling_frequency_hz, usac_sampling_frequency_table, usac_sampling_frequency_table_size); if (sampling_frequency_bitmap == 0){ return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } config[0] = (config[0] & 0xC0) | (uint8_t)(sampling_frequency_bitmap >> 20); config[1] = (uint8_t) (sampling_frequency_bitmap >> 12); config[2] = (uint8_t) (sampling_frequency_bitmap >> 4); config[3] = (sampling_frequency_bitmap & 0x0f) << 4; return ERROR_CODE_SUCCESS; } uint8_t avdtp_config_mpegd_usac_store(uint8_t * config, const avdtp_configuration_mpegd_usac_t * configuration) { if (configuration->object_type != AVDTP_USAC_OBJECT_TYPE_MPEG_D_DRC){ return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } config[0] = 0x80; uint8_t channels_bitmap = 0; switch (configuration->channels){ case 1: channels_bitmap = 0x08; break; case 2: channels_bitmap = 0x04; break; default: return ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE; } config[3] = config[3] | channels_bitmap; config[4] = ((configuration->vbr & 0x01) << 7) | ((configuration->bit_rate >> 16) & 0x7f); config[5] = (configuration->bit_rate >> 8) & 0xff; config[6] = configuration->bit_rate & 0xff; return avdtp_config_mpegd_usac_set_sampling_frequency(config, configuration->sampling_frequency); }