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authorJoão Paulo Rechi Vita <joao.vita@gmail.com>2008-08-29 20:22:14 -0300
committerLennart Poettering <lennart@poettering.net>2008-09-11 01:12:10 +0300
commit78a3c72f60646ab9a44eab94b3afa4652ddeb8db (patch)
tree2721428a2b41562f5085132e7d19822c8b9b9878 /src/modules/bluetooth/ipc.h
parent76bae38460807d2c9f877f546f2b8be2ef728378 (diff)
Move bluetooth discover and device modules to src/modules/bluetooth
Diffstat (limited to 'src/modules/bluetooth/ipc.h')
-rw-r--r--src/modules/bluetooth/ipc.h308
1 files changed, 308 insertions, 0 deletions
diff --git a/src/modules/bluetooth/ipc.h b/src/modules/bluetooth/ipc.h
new file mode 100644
index 00000000..c900fcd1
--- /dev/null
+++ b/src/modules/bluetooth/ipc.h
@@ -0,0 +1,308 @@
+/*
+ *
+ * BlueZ - Bluetooth protocol stack for Linux
+ *
+ * Copyright (C) 2004-2008 Marcel Holtmann <marcel@holtmann.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+/*
+ Message sequence chart of streaming sequence for A2DP transport
+
+ Audio daemon User
+ on snd_pcm_open
+ <--BT_GETCAPABILITIES_REQ
+
+ BT_GETCAPABILITIES_RSP-->
+
+ on snd_pcm_hw_params
+ <--BT_SETCONFIGURATION_REQ
+
+ BT_SETCONFIGURATION_RSP-->
+
+ on snd_pcm_prepare
+ <--BT_STREAMSTART_REQ
+
+ <Moves to streaming state>
+ BT_STREAMSTART_RSP-->
+
+ BT_STREAMFD_IND -->
+
+ < streams data >
+ ..........
+
+ on snd_pcm_drop/snd_pcm_drain
+
+ <--BT_STREAMSTOP_REQ
+
+ <Moves to open state>
+ BT_STREAMSTOP_RSP-->
+
+ on IPC close or appl crash
+ <Moves to idle>
+
+ */
+
+#ifndef BT_AUDIOCLIENT_H
+#define BT_AUDIOCLIENT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <errno.h>
+
+#define BT_AUDIO_IPC_PACKET_SIZE 128
+#define BT_IPC_SOCKET_NAME "\0/org/bluez/audio"
+
+/* Generic message header definition, except for RSP messages */
+typedef struct {
+ uint8_t msg_type;
+} __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 */
+
+#define BT_CAPABILITIES_TRANSPORT_A2DP 0
+#define BT_CAPABILITIES_TRANSPORT_SCO 1
+#define BT_CAPABILITIES_TRANSPORT_ANY 2
+
+#define BT_CAPABILITIES_ACCESS_MODE_READ 1
+#define BT_CAPABILITIES_ACCESS_MODE_WRITE 2
+#define BT_CAPABILITIES_ACCESS_MODE_READWRITE 3
+
+#define BT_FLAG_AUTOCONNECT 1
+
+struct bt_getcapabilities_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 § 4.3
+ */
+
+#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_SBC_SAMPLING_FREQ_48000 1
+
+#define BT_A2DP_CHANNEL_MODE_MONO (1 << 3)
+#define BT_A2DP_CHANNEL_MODE_DUAL_CHANNEL (1 << 2)
+#define BT_A2DP_CHANNEL_MODE_STEREO (1 << 1)
+#define BT_A2DP_CHANNEL_MODE_JOINT_STEREO 1
+
+#define BT_A2DP_BLOCK_LENGTH_4 (1 << 3)
+#define BT_A2DP_BLOCK_LENGTH_8 (1 << 2)
+#define BT_A2DP_BLOCK_LENGTH_12 (1 << 1)
+#define BT_A2DP_BLOCK_LENGTH_16 1
+
+#define BT_A2DP_SUBBANDS_4 (1 << 1)
+#define BT_A2DP_SUBBANDS_8 1
+
+#define BT_A2DP_ALLOCATION_SNR (1 << 1)
+#define BT_A2DP_ALLOCATION_LOUDNESS 1
+
+#define BT_MPEG_SAMPLING_FREQ_16000 (1 << 5)
+#define BT_MPEG_SAMPLING_FREQ_22050 (1 << 4)
+#define BT_MPEG_SAMPLING_FREQ_24000 (1 << 3)
+#define BT_MPEG_SAMPLING_FREQ_32000 (1 << 2)
+#define BT_MPEG_SAMPLING_FREQ_44100 (1 << 1)
+#define BT_MPEG_SAMPLING_FREQ_48000 1
+
+#define BT_MPEG_LAYER_1 (1 << 2)
+#define BT_MPEG_LAYER_2 (1 << 1)
+#define BT_MPEG_LAYER_3 1
+
+typedef struct {
+ uint8_t channel_mode;
+ uint8_t frequency;
+ uint8_t allocation_method;
+ uint8_t subbands;
+ uint8_t block_length;
+ uint8_t min_bitpool;
+ uint8_t max_bitpool;
+} __attribute__ ((packed)) sbc_capabilities_t;
+
+typedef struct {
+ uint8_t channel_mode;
+ uint8_t crc;
+ uint8_t layer;
+ uint8_t frequency;
+ uint8_t mpf;
+ 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 */
+} __attribute__ ((packed));
+
+/* BT_SETCONFIGURATION_REQ */
+struct bt_setconfiguration_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 */
+} __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 */
+} __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 {
+ bt_audio_msg_header_t h;
+} __attribute__ ((packed));
+
+/* BT_STREAMSTART_RSP */
+struct bt_streamstart_rsp {
+ bt_audio_rsp_msg_header_t rsp_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 {
+ bt_audio_msg_header_t h;
+} __attribute__ ((packed));
+
+/* BT_STREAMSTOP_REQ */
+struct bt_streamstop_req {
+ bt_audio_msg_header_t h;
+} __attribute__ ((packed));
+
+/* BT_STREAMSTOP_RSP */
+struct bt_streamstop_rsp {
+ bt_audio_rsp_msg_header_t rsp_h;
+} __attribute__ ((packed));
+
+/* BT_STREAMSUSPEND_IND */
+struct bt_streamsuspend_ind {
+ bt_audio_msg_header_t h;
+} __attribute__ ((packed));
+
+/* BT_STREAMRESUME_IND */
+struct bt_streamresume_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
+#define BT_CONTROL_KEY_MUTE 0x43
+#define BT_CONTROL_KEY_PLAY 0x44
+#define BT_CONTROL_KEY_STOP 0x45
+#define BT_CONTROL_KEY_PAUSE 0x46
+#define BT_CONTROL_KEY_RECORD 0x47
+#define BT_CONTROL_KEY_REWIND 0x48
+#define BT_CONTROL_KEY_FAST_FORWARD 0x49
+#define BT_CONTROL_KEY_EJECT 0x4A
+#define BT_CONTROL_KEY_FORWARD 0x4B
+#define BT_CONTROL_KEY_BACKWARD 0x4C
+
+struct bt_control_req {
+ bt_audio_msg_header_t h;
+ uint8_t mode; /* Control Mode */
+ 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 */
+} __attribute__ ((packed));
+
+/* BT_CONTROL_IND */
+struct bt_control_ind {
+ bt_audio_msg_header_t h;
+ uint8_t mode; /* Control Mode */
+ uint8_t key; /* Control Key */
+} __attribute__ ((packed));
+
+/* Function declaration */
+
+/* Opens a connection to the audio service: return a socket descriptor */
+int bt_audio_service_open();
+
+/* Closes a connection to the audio service */
+int bt_audio_service_close(int sk);
+
+/* Receives stream data file descriptor : must be called after a
+BT_STREAMFD_IND message is returned */
+int bt_audio_service_get_data_fd(int sk);
+
+/* Human readable message type string */
+const char *bt_audio_strmsg(int type);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BT_AUDIOCLIENT_H */