diff options
| -rw-r--r-- | audio/control.c | 87 |
1 files changed, 84 insertions, 3 deletions
diff --git a/audio/control.c b/audio/control.c index 83f48df4..c1e59be9 100644 --- a/audio/control.c +++ b/audio/control.c @@ -51,6 +51,41 @@ #define AVCTP_PSM 23 +/* Message types */ +#define AVCTP_COMMAND 0 +#define AVCTP_RESPONSE 1 + +/* Packet types */ +#define AVCTP_PACKET_SINGLE 0 +#define AVCTP_PACKET_START 1 +#define AVCTP_PACKET_CONTINUE 2 +#define AVCTP_PACKET_END 3 + +/* ctype entries */ +#define CTYPE_CONTROL 0x0 +#define CTYPE_STATUS 0x1 +#define CTYPE_ACCEPTED 0x9 +#define CTYPE_STABLE 0xC + +/* opcodes */ +#define OP_UNITINFO 0x30 +#define OP_SUBUNITINFO 0x31 +#define OP_PASSTHROUGH 0x7c + +/* subunits of interest */ +#define SUBUNIT_PANEL 0x09 + +/* operands in passthrough commands */ +#define VOLUP_OP 0x41 +#define VOLDOWN_OP 0x42 +#define MUTE_OP 0x43 + +#define PLAY_OP 0x44 +#define STOP_OP 0x45 +#define PAUSE_OP 0x46 +#define NEXT_OP 0x4b +#define PREV_OP 0x4c + static DBusConnection *connection = NULL; static uint32_t tg_record_id = 0; @@ -379,14 +414,41 @@ static struct avctp *avctp_get(bdaddr_t *src, bdaddr_t *dst) return session; } +static void handle_panel_passthrough(const unsigned char *operands, int operand_count) +{ + if (operand_count == 0) + return; + + switch (operands[0]) { + case PLAY_OP: + debug("AVRCP: got PLAY"); + break; + case STOP_OP: + debug("AVRCP: got STOP"); + break; + case PAUSE_OP: + debug("AVRCP: got PAUSE"); + break; + case NEXT_OP: + debug("AVRCP: got NEXT"); + break; + case PREV_OP: + debug("AVRCP: got PREV"); + break; + default: + debug("AVRCP: got unknown operand 0x%02X", operands[0]); + break; + } +} + static gboolean session_cb(GIOChannel *chan, GIOCondition cond, gpointer data) { struct avctp *session = data; - char buf[1024]; + unsigned char buf[1024], *operands; struct avctp_header *avctp; struct avrcp_header *avrcp; - int ret; + int ret, packet_size, operand_count; if (!(cond | G_IO_IN)) goto failed; @@ -402,6 +464,8 @@ static gboolean session_cb(GIOChannel *chan, GIOCondition cond, goto failed; } + packet_size = ret; + avctp = (struct avctp_header *) buf; debug("AVCTP transaction %u, packet type %u, C/R %u, IPID %u, " @@ -417,11 +481,28 @@ static gboolean session_cb(GIOChannel *chan, GIOCondition cond, avrcp = (struct avrcp_header *) (buf + sizeof(struct avctp_header)); + ret -= sizeof(struct avrcp_header); + + operands = buf + sizeof(struct avctp_header) + sizeof(struct avrcp_header); + operand_count = ret; + debug("AVRCP %s 0x%01X, subunit_type 0x%02X, subunit_id 0x%01X, " "opcode 0x%02X, %d operands", avctp->cr ? "response" : "command", avrcp->code, avrcp->subunit_type, avrcp->subunit_id, - avrcp->opcode, ret - sizeof(struct avctp_header)); + avrcp->opcode, operand_count); + + if (avctp->packet_type == AVCTP_PACKET_SINGLE && + avctp->cr == AVCTP_COMMAND && + avctp->pid == htons(AV_REMOTE_SVCLASS_ID) && + avrcp->code == CTYPE_CONTROL && + avrcp->subunit_type == SUBUNIT_PANEL && + avrcp->opcode == OP_PASSTHROUGH) { + handle_panel_passthrough(operands, operand_count); + avctp->cr = AVCTP_RESPONSE; + avrcp->code = CTYPE_ACCEPTED; + ret = write(session->sock, buf, packet_size); + } return TRUE; |