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avrcp_controller: allow to send multiple absolute volume commands without waiting for response.

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This commit is contained in:
Milanka Ringwald 2020-11-05 11:21:38 +01:00
parent 022b77fc16
commit 6e7485d0cb
3 changed files with 46 additions and 6 deletions
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1
CHANGELOG.md
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@ -21,6 +21,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
### Added
### Changed
AVRCP Controller: allow to send multiple absolute volume commands without waiting for response.
## Changes October 2020

5
src/classic/avrcp.h
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@ -469,7 +469,10 @@ typedef struct {
// transaction id
uint8_t transaction_id_counter;
// limit number of pending commands to transaction id window size
uint8_t last_confirmed_transaction_id;
// command
uint8_t transaction_id;

46
src/classic/avrcp_controller.c
View File

@ -50,14 +50,24 @@
// made public in avrcp_controller.h
avrcp_context_t avrcp_controller_context;
static uint8_t avrcp_controller_get_next_transaction_label(avrcp_connection_t * connection){
connection->transaction_id_counter++;
if (connection->transaction_id_counter == 16){
connection->transaction_id_counter = 1;
static uint8_t avrcp_controller_calc_next_transaction_label(uint8_t current_transaction_label){
current_transaction_label++;
if (current_transaction_label == 16){
current_transaction_label = 1;
}
return current_transaction_label;
}
static uint8_t avrcp_controller_get_next_transaction_label(avrcp_connection_t * connection){
connection->transaction_id_counter = avrcp_controller_calc_next_transaction_label(connection->transaction_id_counter);
return connection->transaction_id_counter;
}
static bool avrcp_controller_is_transaction_id_valid(avrcp_connection_t * connection, uint8_t transaction_id){
uint8_t delta = ((int8_t) transaction_id - connection->last_confirmed_transaction_id) & 0x0f;
return delta < 15;
}
static uint16_t avrcp_get_max_payload_size_for_packet_type(avrcp_packet_type_t packet_type){
switch (packet_type){
case AVRCP_SINGLE_PACKET:
@ -671,6 +681,8 @@ static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connec
uint16_t pos = 3;
uint8_t pdu_id;
connection->last_confirmed_transaction_id = packet[0] >> 4;
avrcp_frame_type_t frame_type = (avrcp_frame_type_t)((packet[0] >> 1) & 0x01);
if (frame_type != AVRCP_RESPONSE_FRAME) return;
@ -1338,7 +1350,31 @@ uint8_t avrcp_controller_set_absolute_volume(uint16_t avrcp_cid, uint8_t volume)
log_error("avrcp_get_capabilities: could not find a connection.");
return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
}
if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED;
//
// allow sending of multiple set abs volume commands without waiting for response
//
uint8_t status = ERROR_CODE_COMMAND_DISALLOWED;
switch (connection->state){
case AVCTP_CONNECTION_OPENED:
status = ERROR_CODE_SUCCESS;
break;
case AVCTP_W2_RECEIVE_RESPONSE:
// - is pending response also set abs volume
if (connection->command_opcode != AVRCP_CMD_OPCODE_VENDOR_DEPENDENT) break;
if (connection->command_type != AVRCP_CTYPE_CONTROL) break;
if (connection->subunit_type != AVRCP_SUBUNIT_TYPE_PANEL) break;
if (connection->subunit_id != AVRCP_SUBUNIT_ID) break;
if (connection->cmd_operands[3] != AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME) break;
// - is next transaction id valid in window
if (avrcp_controller_is_transaction_id_valid(connection, avrcp_controller_calc_next_transaction_label(connection->transaction_id_counter)) == false) break;
status = ERROR_CODE_SUCCESS;
break;
default:
break;
}
if (status != ERROR_CODE_SUCCESS) return status;
connection->state = AVCTP_W2_SEND_COMMAND;
connection->transaction_id = avrcp_controller_get_next_transaction_label(connection);