/*
Message sequence chart of streaming sequence for A2DP transport
- Audio daemon User
- on snd_pcm_open
- <--BT_GETCAPABILITIES_REQ
+ Audio daemon User
+ on snd_pcm_open
+ <--BT_GET_CAPABILITIES_REQ
- BT_GETCAPABILITIES_RSP-->
+ BT_GET_CAPABILITIES_RSP-->
- on snd_pcm_hw_params
- <--BT_SETCONFIGURATION_REQ
+ on snd_pcm_hw_params
+ <--BT_SETCONFIGURATION_REQ
- BT_SETCONFIGURATION_RSP-->
+ BT_SET_CONFIGURATION_RSP-->
- on snd_pcm_prepare
- <--BT_STREAMSTART_REQ
+ on snd_pcm_prepare
+ <--BT_START_STREAM_REQ
<Moves to streaming state>
- BT_STREAMSTART_RSP-->
+ BT_START_STREAM_RSP-->
- BT_STREAMFD_IND -->
+ BT_NEW_STREAM_IND -->
- < streams data >
- ..........
+ < streams data >
+ ..........
- on snd_pcm_drop/snd_pcm_drain
+ on snd_pcm_drop/snd_pcm_drain
- <--BT_STREAMSTOP_REQ
+ <--BT_STOP_STREAM_REQ
<Moves to open state>
- BT_STREAMSTOP_RSP-->
+ BT_STOP_STREAM_RSP-->
- on IPC close or appl crash
+ on IPC close or appl crash
<Moves to idle>
*/
#include <sys/un.h>
#include <errno.h>
-#define BT_AUDIO_IPC_PACKET_SIZE 128
+#define BT_SUGGESTED_BUFFER_SIZE 128
#define BT_IPC_SOCKET_NAME "\0/org/bluez/audio"
-/* Generic message header definition, except for RSP messages */
+/* Generic message header definition, except for RESPONSE messages */
typedef struct {
- uint8_t msg_type;
+ uint8_t type;
+ uint8_t name;
+ uint16_t length;
} __attribute__ ((packed)) bt_audio_msg_header_t;
-/* Generic message header definition, for all RSP messages */
typedef struct {
- bt_audio_msg_header_t msg_h;
- uint8_t posix_errno;
-} __attribute__ ((packed)) bt_audio_rsp_msg_header_t;
-
-/* Messages list */
-#define BT_GETCAPABILITIES_REQ 0
-#define BT_GETCAPABILITIES_RSP 1
-
-#define BT_SETCONFIGURATION_REQ 2
-#define BT_SETCONFIGURATION_RSP 3
-
-#define BT_STREAMSTART_REQ 4
-#define BT_STREAMSTART_RSP 5
-
-#define BT_STREAMSTOP_REQ 6
-#define BT_STREAMSTOP_RSP 7
-
-#define BT_STREAMSUSPEND_IND 8
-#define BT_STREAMRESUME_IND 9
-
-#define BT_CONTROL_REQ 10
-#define BT_CONTROL_RSP 11
-#define BT_CONTROL_IND 12
-
-#define BT_STREAMFD_IND 13
-
-/* BT_GETCAPABILITIES_REQ */
+ bt_audio_msg_header_t h;
+ uint8_t posix_errno;
+} __attribute__ ((packed)) bt_audio_error_t;
+
+/* Message types */
+#define BT_REQUEST 0
+#define BT_RESPONSE 1
+#define BT_INDICATION 2
+#define BT_ERROR 3
+
+/* Messages names */
+#define BT_GET_CAPABILITIES 0
+#define BT_SET_CONFIGURATION 1
+#define BT_NEW_STREAM 2
+#define BT_START_STREAM 3
+#define BT_STOP_STREAM 4
+#define BT_SUSPEND_STREAM 5
+#define BT_RESUME_STREAM 6
+#define BT_CONTROL 7
#define BT_CAPABILITIES_TRANSPORT_A2DP 0
#define BT_CAPABILITIES_TRANSPORT_SCO 1
#define BT_FLAG_AUTOCONNECT 1
-struct bt_getcapabilities_req {
+struct bt_get_capabilities_req {
bt_audio_msg_header_t h;
char device[18]; /* Address of the remote Device */
uint8_t transport; /* Requested transport */
uint8_t flags; /* Requested flags */
} __attribute__ ((packed));
-/* BT_GETCAPABILITIES_RSP */
-
/**
* SBC Codec parameters as per A2DP profile 1.0 ยง 4.3
*/
+#define BT_A2DP_CODEC_SBC 0x00
+#define BT_A2DP_CODEC_MPEG12 0x01
+#define BT_A2DP_CODEC_MPEG24 0x02
+#define BT_A2DP_CODEC_ATRAC 0x03
+
#define BT_SBC_SAMPLING_FREQ_16000 (1 << 3)
#define BT_SBC_SAMPLING_FREQ_32000 (1 << 2)
#define BT_SBC_SAMPLING_FREQ_44100 (1 << 1)
#define BT_MPEG_LAYER_2 (1 << 1)
#define BT_MPEG_LAYER_3 1
+#define BT_HFP_CODEC_PCM 0x00
+
+#define BT_PCM_FLAG_NREC 1
+
+typedef struct {
+ uint8_t transport;
+ uint8_t type;
+ uint8_t length;
+ uint8_t data[0];
+} __attribute__ ((packed)) codec_capabilities_t;
+
typedef struct {
+ codec_capabilities_t capability;
uint8_t channel_mode;
uint8_t frequency;
uint8_t allocation_method;
} __attribute__ ((packed)) sbc_capabilities_t;
typedef struct {
+ codec_capabilities_t capability;
uint8_t channel_mode;
uint8_t crc;
uint8_t layer;
uint16_t bitrate;
} __attribute__ ((packed)) mpeg_capabilities_t;
-struct bt_getcapabilities_rsp {
- bt_audio_rsp_msg_header_t rsp_h;
- uint8_t transport; /* Granted transport */
- sbc_capabilities_t sbc_capabilities; /* A2DP only */
- mpeg_capabilities_t mpeg_capabilities; /* A2DP only */
- uint16_t sampling_rate; /* SCO only */
+typedef struct {
+ codec_capabilities_t capability;
+ uint8_t flags;
+ uint16_t sampling_rate;
+} __attribute__ ((packed)) pcm_capabilities_t;
+
+
+struct bt_get_capabilities_rsp {
+ bt_audio_msg_header_t h;
+ uint8_t data[0]; /* First codec_capabilities_t */
} __attribute__ ((packed));
-/* BT_SETCONFIGURATION_REQ */
-struct bt_setconfiguration_req {
+struct bt_set_configuration_req {
bt_audio_msg_header_t h;
- char device[18]; /* Address of the remote Device */
- uint8_t transport; /* Requested transport */
- uint8_t access_mode; /* Requested access mode */
- sbc_capabilities_t sbc_capabilities; /* A2DP only - only one of this field
- and next one must be filled */
- mpeg_capabilities_t mpeg_capabilities; /* A2DP only */
+ char device[18]; /* Address of the remote Device */
+ uint8_t access_mode; /* Requested access mode */
+ codec_capabilities_t codec; /* Requested codec */
} __attribute__ ((packed));
-/* BT_SETCONFIGURATION_RSP */
-struct bt_setconfiguration_rsp {
- bt_audio_rsp_msg_header_t rsp_h;
- uint8_t transport; /* Granted transport */
- uint8_t access_mode; /* Granted access mode */
- uint16_t link_mtu; /* Max length that transport supports */
+struct bt_set_configuration_rsp {
+ bt_audio_msg_header_t h;
+ uint8_t transport; /* Granted transport */
+ uint8_t access_mode; /* Granted access mode */
+ uint16_t link_mtu; /* Max length that transport supports */
} __attribute__ ((packed));
-/* BT_STREAMSTART_REQ */
#define BT_STREAM_ACCESS_READ 0
#define BT_STREAM_ACCESS_WRITE 1
#define BT_STREAM_ACCESS_READWRITE 2
-struct bt_streamstart_req {
+struct bt_start_stream_req {
bt_audio_msg_header_t h;
} __attribute__ ((packed));
-/* BT_STREAMSTART_RSP */
-struct bt_streamstart_rsp {
- bt_audio_rsp_msg_header_t rsp_h;
+struct bt_start_stream_rsp {
+ bt_audio_msg_header_t h;
} __attribute__ ((packed));
-/* BT_STREAMFD_IND */
/* This message is followed by one byte of data containing the stream data fd
as ancilliary data */
-struct bt_streamfd_ind {
+struct bt_new_stream_ind {
bt_audio_msg_header_t h;
} __attribute__ ((packed));
-/* BT_STREAMSTOP_REQ */
-struct bt_streamstop_req {
+struct bt_stop_stream_req {
bt_audio_msg_header_t h;
} __attribute__ ((packed));
-/* BT_STREAMSTOP_RSP */
-struct bt_streamstop_rsp {
- bt_audio_rsp_msg_header_t rsp_h;
+struct bt_stop_stream_rsp {
+ bt_audio_msg_header_t h;
} __attribute__ ((packed));
-/* BT_STREAMSUSPEND_IND */
-struct bt_streamsuspend_ind {
+struct bt_suspend_stream_ind {
bt_audio_msg_header_t h;
} __attribute__ ((packed));
-/* BT_STREAMRESUME_IND */
-struct bt_streamresume_ind {
+struct bt_resume_stream_ind {
bt_audio_msg_header_t h;
} __attribute__ ((packed));
-/* BT_CONTROL_REQ */
-
#define BT_CONTROL_KEY_POWER 0x40
#define BT_CONTROL_KEY_VOL_UP 0x41
#define BT_CONTROL_KEY_VOL_DOWN 0x42
uint8_t key; /* Control Key */
} __attribute__ ((packed));
-/* BT_CONTROL_RSP */
struct bt_control_rsp {
- bt_audio_rsp_msg_header_t rsp_h;
- uint8_t mode; /* Control Mode */
- uint8_t key; /* Control Key */
+ bt_audio_msg_header_t h;
+ uint8_t mode; /* Control Mode */
+ uint8_t key; /* Control Key */
} __attribute__ ((packed));
-/* BT_CONTROL_IND */
struct bt_control_ind {
bt_audio_msg_header_t h;
uint8_t mode; /* Control Mode */
int bt_audio_service_get_data_fd(int sk);
/* Human readable message type string */
-const char *bt_audio_strmsg(int type);
+const char *bt_audio_strtype(uint8_t type);
+
+/* Human readable message name string */
+const char *bt_audio_strname(uint8_t name);
#ifdef __cplusplus
}
projects / profile / ivi / pulseaudio-panda.git / blobdiff