src/modules/module-bt-device.c

   1 /***
   2     This file is part of PulseAudio.
   3
   4     Copyright 2008 Joao Paulo Rechi Vita
   5
   6     PulseAudio is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU Lesser General Public License as published
   8     by the Free Software Foundation; either version 2 of the License,
   9     or (at your option) any later version.
  10
  11     PulseAudio is distributed in the hope that it will be useful, but
  12     WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14     General Public License for more details.
  15
  16     You should have received a copy of the GNU Lesser General Public License
  17     along with PulseAudio; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19     USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <string.h>
  27 #include <errno.h>
  28 #include <poll.h>
  29
  30 #include <pulse/xmalloc.h>
  31 #include <pulse/timeval.h>
  32 #include <pulse/sample.h>
  33 #include <pulsecore/core-error.h>
  34 #include <pulsecore/module.h>
  35 #include <pulsecore/modargs.h>
  36 #include <pulsecore/thread.h>
  37 #include <pulsecore/thread-mq.h>
  38 #include <pulsecore/rtpoll.h>
  39 #include <pulsecore/time-smoother.h>
  40 #include <pulsecore/rtclock.h>
  41
  42 #include "dbus-util.h"
  43 #include "module-bt-device-symdef.h"
  44 #include "bt-ipc.h"
  45 #include "bt-sbc.h"
  46
  47 #define DEFAULT_SINK_NAME "bt_sink"
  48 #define BUFFER_SIZE 2048
  49 #define MAX_BITPOOL 64
  50 #define MIN_BITPOOL 2
  51
  52 PA_MODULE_AUTHOR("Joao Paulo Rechi Vita");
  53 PA_MODULE_DESCRIPTION("Bluetooth audio sink and source");
  54 PA_MODULE_VERSION(PACKAGE_VERSION);
  55 PA_MODULE_LOAD_ONCE(FALSE);
  56 PA_MODULE_USAGE(
  57         "name=<name of the device> "
  58         "addr=<address of the device> "
  59         "profile=<a2dp|hsp>");
  60
  61 struct bt_a2dp {
  62     sbc_capabilities_t sbc_capabilities;
  63     sbc_t sbc;                           /* Codec data */
  64     int sbc_initialized;                 /* Keep track if the encoder is initialized */
  65     int codesize;                        /* SBC codesize */
  66     int samples;                         /* Number of encoded samples */
  67     uint8_t buffer[BUFFER_SIZE];         /* Codec transfer buffer */
  68     int count;                           /* Codec transfer buffer counter */
  69
  70     int nsamples;                        /* Cumulative number of codec samples */
  71     uint16_t seq_num;                    /* Cumulative packet sequence */
  72     int frame_count;                     /* Current frames in buffer*/
  73 };
  74
  75 struct userdata {
  76     pa_core *core;
  77     pa_module *module;
  78     pa_sink *sink;
  79
  80     pa_thread_mq thread_mq;
  81     pa_rtpoll *rtpoll;
  82     pa_rtpoll_item *rtpoll_item;
  83     pa_thread *thread;
  84
  85     int64_t offset;
  86     pa_smoother *smoother;
  87
  88     pa_memchunk memchunk;
  89
  90     const char *name;
  91     const char *addr;
  92     const char *profile;
  93     int rate;
  94     int channels;
  95     pa_sample_spec ss;
  96
  97     int audioservice_fd;
  98     int stream_fd;
  99
 100     int transport;
 101     int link_mtu;
 102     size_t block_size;
 103     pa_usec_t latency;
 104
 105     struct bt_a2dp a2dp;
 106 };
 107
 108 static const char* const valid_modargs[] = {
 109     "name",
 110     "addr",
 111     "profile",
 112     "rate",
 113     "channels",
 114     NULL
 115 };
 116
 117 static int bt_audioservice_send(int sk, const bt_audio_msg_header_t *msg) {
 118     int e;
 119     pa_log/*_debug*/("sending %s", bt_audio_strmsg(msg->msg_type));
 120     if (send(sk, msg, BT_AUDIO_IPC_PACKET_SIZE, 0) > 0)
 121         e = 0;
 122     else {
 123         e = -errno;
 124         pa_log_error("Error sending data to audio service: %s(%d)", pa_cstrerror(errno), errno);
 125     }
 126     return e;
 127 }
 128
 129 static int bt_audioservice_recv(int sk, bt_audio_msg_header_t *inmsg) {
 130     int e;
 131     const char *type;
 132
 133     pa_log/*_debug*/("trying to receive msg from audio service...");
 134     if (recv(sk, inmsg, BT_AUDIO_IPC_PACKET_SIZE, 0) > 0) {
 135         type = bt_audio_strmsg(inmsg->msg_type);
 136         if (type) {
 137             pa_log/*_debug*/("Received %s", type);
 138             e = 0;
 139         }
 140         else {
 141             e = -EINVAL;
 142             pa_log_error("Bogus message type %d received from audio service", inmsg->msg_type);
 143         }
 144     }
 145     else {
 146         e = -errno;
 147         pa_log_error("Error receiving data from audio service: %s(%d)", pa_cstrerror(errno), errno);
 148     }
 149
 150     return e;
 151 }
 152
 153 static int bt_audioservice_expect(int sk, bt_audio_msg_header_t *rsp_hdr, int expected_type) {
 154     int e = bt_audioservice_recv(sk, rsp_hdr);
 155     if (e == 0) {
 156         if (rsp_hdr->msg_type != expected_type) {
 157             e = -EINVAL;
 158             pa_log_error("Bogus message %s received while %s was expected", bt_audio_strmsg(rsp_hdr->msg_type),
 159                     bt_audio_strmsg(expected_type));
 160         }
 161     }
 162     return e;
 163 }
 164
 165 static int bt_getcaps(struct userdata *u) {
 166     int e;
 167     char buf[BT_AUDIO_IPC_PACKET_SIZE];
 168     bt_audio_rsp_msg_header_t *rsp_hdr = (void*) buf;
 169     struct bt_getcapabilities_req *getcaps_req = (void*) buf;
 170     struct bt_getcapabilities_rsp *getcaps_rsp = (void*) buf;
 171
 172     memset(getcaps_req, 0, BT_AUDIO_IPC_PACKET_SIZE);
 173     getcaps_req->h.msg_type = BT_GETCAPABILITIES_REQ;
 174     strncpy(getcaps_req->device, u->addr, 18);
 175     if (strcasecmp(u->profile, "a2dp") == 0)
 176         getcaps_req->transport = BT_CAPABILITIES_TRANSPORT_A2DP;
 177     else if (strcasecmp(u->profile, "hsp") == 0)
 178         getcaps_req->transport = BT_CAPABILITIES_TRANSPORT_SCO;
 179     else {
 180         pa_log_error("invalid profile argument: %s", u->profile);
 181         return -1;
 182     }
 183     getcaps_req->flags = 0;
 184     getcaps_req->flags |= BT_FLAG_AUTOCONNECT;
 185
 186     e = bt_audioservice_send(u->audioservice_fd, &getcaps_req->h);
 187     if (e < 0) {
 188         pa_log_error("failed to send GETCAPABILITIES_REQ");
 189         return e;
 190     }
 191
 192     e = bt_audioservice_expect(u->audioservice_fd, &rsp_hdr->msg_h, BT_GETCAPABILITIES_RSP);
 193     if (e < 0) {
 194         pa_log_error("failed to expect for GETCAPABILITIES_RSP");
 195         return e;
 196     }
 197     if (rsp_hdr->posix_errno != 0) {
 198         pa_log_error("BT_GETCAPABILITIES failed : %s (%d)", pa_cstrerror(rsp_hdr->posix_errno), rsp_hdr->posix_errno);
 199         return -rsp_hdr->posix_errno;
 200     }
 201
 202     if ((u->transport = getcaps_rsp->transport) == BT_CAPABILITIES_TRANSPORT_A2DP)
 203         u->a2dp.sbc_capabilities = getcaps_rsp->sbc_capabilities;
 204
 205     return 0;
 206 }
 207
 208 static uint8_t default_bitpool(uint8_t freq, uint8_t mode) {
 209     switch (freq) {
 210         case BT_SBC_SAMPLING_FREQ_16000:
 211         case BT_SBC_SAMPLING_FREQ_32000:
 212             return 53;
 213         case BT_SBC_SAMPLING_FREQ_44100:
 214             switch (mode) {
 215                 case BT_A2DP_CHANNEL_MODE_MONO:
 216                 case BT_A2DP_CHANNEL_MODE_DUAL_CHANNEL:
 217                     return 31;
 218                 case BT_A2DP_CHANNEL_MODE_STEREO:
 219                 case BT_A2DP_CHANNEL_MODE_JOINT_STEREO:
 220                     return 53;
 221                 default:
 222                     pa_log_warn("Invalid channel mode %u", mode);
 223                     return 53;
 224             }
 225         case BT_SBC_SAMPLING_FREQ_48000:
 226             switch (mode) {
 227                 case BT_A2DP_CHANNEL_MODE_MONO:
 228                 case BT_A2DP_CHANNEL_MODE_DUAL_CHANNEL:
 229                     return 29;
 230                 case BT_A2DP_CHANNEL_MODE_STEREO:
 231                 case BT_A2DP_CHANNEL_MODE_JOINT_STEREO:
 232                     return 51;
 233                 default:
 234                     pa_log_warn("Invalid channel mode %u", mode);
 235                     return 51;
 236             }
 237         default:
 238             pa_log_warn("Invalid sampling freq %u", freq);
 239             return 53;
 240     }
 241 }
 242
 243 static int bt_a2dp_init(struct userdata *u) {
 244     sbc_capabilities_t *cap = &u->a2dp.sbc_capabilities;
 245     unsigned int max_bitpool, min_bitpool, rate, channels;
 246
 247     switch (u->rate) {
 248         case 48000:
 249             cap->frequency = BT_SBC_SAMPLING_FREQ_48000;
 250             break;
 251         case 44100:
 252             cap->frequency = BT_SBC_SAMPLING_FREQ_44100;
 253             break;
 254         case 32000:
 255             cap->frequency = BT_SBC_SAMPLING_FREQ_32000;
 256             break;
 257         case 16000:
 258             cap->frequency = BT_SBC_SAMPLING_FREQ_16000;
 259             break;
 260         default:
 261             pa_log_error("Rate %d not supported", rate);
 262             return -1;
 263     }
 264
 265 //    if (cfg->has_channel_mode)
 266 //        cap->channel_mode = cfg->channel_mode;
 267 //    else
 268     if (channels == 2) {
 269         if (cap->channel_mode & BT_A2DP_CHANNEL_MODE_JOINT_STEREO)
 270             cap->channel_mode = BT_A2DP_CHANNEL_MODE_JOINT_STEREO;
 271         else if (cap->channel_mode & BT_A2DP_CHANNEL_MODE_STEREO)
 272             cap->channel_mode = BT_A2DP_CHANNEL_MODE_STEREO;
 273         else if (cap->channel_mode & BT_A2DP_CHANNEL_MODE_DUAL_CHANNEL)
 274             cap->channel_mode = BT_A2DP_CHANNEL_MODE_DUAL_CHANNEL;
 275     } else {
 276         if (cap->channel_mode & BT_A2DP_CHANNEL_MODE_MONO)
 277             cap->channel_mode = BT_A2DP_CHANNEL_MODE_MONO;
 278     }
 279
 280     if (!cap->channel_mode) {
 281         pa_log_error("No supported channel modes");
 282         return -1;
 283     }
 284
 285 //    if (cfg->has_block_length)
 286 //        cap->block_length = cfg->block_length;
 287 //    else
 288     if (cap->block_length & BT_A2DP_BLOCK_LENGTH_16)
 289         cap->block_length = BT_A2DP_BLOCK_LENGTH_16;
 290     else if (cap->block_length & BT_A2DP_BLOCK_LENGTH_12)
 291         cap->block_length = BT_A2DP_BLOCK_LENGTH_12;
 292     else if (cap->block_length & BT_A2DP_BLOCK_LENGTH_8)
 293         cap->block_length = BT_A2DP_BLOCK_LENGTH_8;
 294     else if (cap->block_length & BT_A2DP_BLOCK_LENGTH_4)
 295         cap->block_length = BT_A2DP_BLOCK_LENGTH_4;
 296     else {
 297         pa_log_error("No supported block lengths");
 298         return -1;
 299     }
 300
 301 //    if (cfg->has_subbands)
 302 //        cap->subbands = cfg->subbands;
 303     if (cap->subbands & BT_A2DP_SUBBANDS_8)
 304         cap->subbands = BT_A2DP_SUBBANDS_8;
 305     else if (cap->subbands & BT_A2DP_SUBBANDS_4)
 306         cap->subbands = BT_A2DP_SUBBANDS_4;
 307     else {
 308         pa_log_error("No supported subbands");
 309         return -1;
 310     }
 311
 312 //    if (cfg->has_allocation_method)
 313 //        cap->allocation_method = cfg->allocation_method;
 314     if (cap->allocation_method & BT_A2DP_ALLOCATION_LOUDNESS)
 315         cap->allocation_method = BT_A2DP_ALLOCATION_LOUDNESS;
 316     else if (cap->allocation_method & BT_A2DP_ALLOCATION_SNR)
 317         cap->allocation_method = BT_A2DP_ALLOCATION_SNR;
 318
 319 //    if (cfg->has_bitpool)
 320 //        min_bitpool = max_bitpool = cfg->bitpool;
 321 //    else {
 322     min_bitpool = MAX(MIN_BITPOOL, cap->min_bitpool);
 323     max_bitpool = MIN(default_bitpool(cap->frequency, cap->channel_mode), cap->max_bitpool);
 324 //    }
 325
 326     cap->min_bitpool = min_bitpool;
 327     cap->max_bitpool = max_bitpool;
 328
 329     return 0;
 330 }
 331
 332 static void bt_a2dp_setup(struct bt_a2dp *a2dp) {
 333     sbc_capabilities_t active_capabilities = a2dp->sbc_capabilities;
 334
 335     if (a2dp->sbc_initialized)
 336         sbc_reinit(&a2dp->sbc, 0);
 337     else
 338         sbc_init(&a2dp->sbc, 0);
 339     a2dp->sbc_initialized = 1;
 340
 341     if (active_capabilities.frequency & BT_SBC_SAMPLING_FREQ_16000)
 342         a2dp->sbc.frequency = SBC_FREQ_16000;
 343
 344     if (active_capabilities.frequency & BT_SBC_SAMPLING_FREQ_32000)
 345         a2dp->sbc.frequency = SBC_FREQ_32000;
 346
 347     if (active_capabilities.frequency & BT_SBC_SAMPLING_FREQ_44100)
 348         a2dp->sbc.frequency = SBC_FREQ_44100;
 349
 350     if (active_capabilities.frequency & BT_SBC_SAMPLING_FREQ_48000)
 351         a2dp->sbc.frequency = SBC_FREQ_48000;
 352
 353     if (active_capabilities.channel_mode & BT_A2DP_CHANNEL_MODE_MONO)
 354         a2dp->sbc.mode = SBC_MODE_MONO;
 355
 356     if (active_capabilities.channel_mode & BT_A2DP_CHANNEL_MODE_DUAL_CHANNEL)
 357         a2dp->sbc.mode = SBC_MODE_DUAL_CHANNEL;
 358
 359     if (active_capabilities.channel_mode & BT_A2DP_CHANNEL_MODE_STEREO)
 360         a2dp->sbc.mode = SBC_MODE_STEREO;
 361
 362     if (active_capabilities.channel_mode & BT_A2DP_CHANNEL_MODE_JOINT_STEREO)
 363         a2dp->sbc.mode = SBC_MODE_JOINT_STEREO;
 364
 365     a2dp->sbc.allocation = active_capabilities.allocation_method == BT_A2DP_ALLOCATION_SNR ? SBC_AM_SNR : SBC_AM_LOUDNESS;
 366
 367     switch (active_capabilities.subbands) {
 368         case BT_A2DP_SUBBANDS_4:
 369             a2dp->sbc.subbands = SBC_SB_4;
 370             break;
 371         case BT_A2DP_SUBBANDS_8:
 372             a2dp->sbc.subbands = SBC_SB_8;
 373             break;
 374     }
 375
 376     switch (active_capabilities.block_length) {
 377         case BT_A2DP_BLOCK_LENGTH_4:
 378             a2dp->sbc.blocks = SBC_BLK_4;
 379             break;
 380         case BT_A2DP_BLOCK_LENGTH_8:
 381             a2dp->sbc.blocks = SBC_BLK_8;
 382             break;
 383         case BT_A2DP_BLOCK_LENGTH_12:
 384             a2dp->sbc.blocks = SBC_BLK_12;
 385             break;
 386         case BT_A2DP_BLOCK_LENGTH_16:
 387             a2dp->sbc.blocks = SBC_BLK_16;
 388             break;
 389     }
 390
 391     a2dp->sbc.bitpool = active_capabilities.max_bitpool;
 392     a2dp->codesize = sbc_get_codesize(&a2dp->sbc);
 393 //    a2dp->count = sizeof(struct rtp_header) + sizeof(struct rtp_payload);
 394 }
 395
 396 static int bt_setconf(struct userdata *u) {
 397     int e;
 398     char buf[BT_AUDIO_IPC_PACKET_SIZE];
 399     bt_audio_rsp_msg_header_t *rsp_hdr = (void*) buf;
 400     struct bt_setconfiguration_req *setconf_req = (void*) buf;
 401     struct bt_setconfiguration_rsp *setconf_rsp = (void*) buf;
 402
 403     if (u->transport == BT_CAPABILITIES_TRANSPORT_A2DP) {
 404         e = bt_a2dp_init(u);
 405         if (e < 0) {
 406             pa_log_error("a2dp_init error");
 407             return e;
 408         }
 409     }
 410
 411     memset(setconf_req, 0, BT_AUDIO_IPC_PACKET_SIZE);
 412     setconf_req->h.msg_type = BT_SETCONFIGURATION_REQ;
 413     strncpy(setconf_req->device, u->addr, 18);
 414     setconf_req->transport = u->transport;
 415     if (u->transport == BT_CAPABILITIES_TRANSPORT_A2DP)
 416         setconf_req->sbc_capabilities = u->a2dp.sbc_capabilities;
 417     setconf_req->access_mode = BT_CAPABILITIES_ACCESS_MODE_WRITE;
 418
 419     e = bt_audioservice_send(u->audioservice_fd, &setconf_req->h);
 420     if (e < 0) {
 421         pa_log_error("failed to send BT_SETCONFIGURATION_REQ");
 422         return e;
 423     }
 424
 425     e = bt_audioservice_expect(u->audioservice_fd, &rsp_hdr->msg_h, BT_SETCONFIGURATION_RSP);
 426     if (e < 0) {
 427         pa_log_error("failed to expect BT_SETCONFIGURATION_RSP");
 428         return e;
 429     }
 430
 431     if (rsp_hdr->posix_errno != 0) {
 432         pa_log_error("BT_SETCONFIGURATION failed : %s(%d)", pa_cstrerror(rsp_hdr->posix_errno), rsp_hdr->posix_errno);
 433         return -rsp_hdr->posix_errno;
 434     }
 435
 436     u->transport = setconf_rsp->transport;
 437     u->block_size = u->link_mtu = setconf_rsp->link_mtu;
 438
 439     /* setup SBC encoder now we agree on parameters */
 440     if (u->transport == BT_CAPABILITIES_TRANSPORT_A2DP) {
 441         bt_a2dp_setup(&u->a2dp);
 442         pa_log/*debug*/("\tallocation=%u\n\tsubbands=%u\n\tblocks=%u\n\tbitpool=%u\n",
 443                 u->a2dp.sbc.allocation, u->a2dp.sbc.subbands, u->a2dp.sbc.blocks, u->a2dp.sbc.bitpool);
 444     }
 445
 446     return 0;
 447 }
 448
 449 static int bt_getstreamfd(struct userdata *u) {
 450     int e/*, opt_name*/;
 451     char buf[BT_AUDIO_IPC_PACKET_SIZE];
 452     struct bt_streamstart_req *start_req = (void*) buf;
 453     bt_audio_rsp_msg_header_t *rsp_hdr = (void*) buf;
 454     struct bt_streamfd_ind *streamfd_ind = (void*) buf;
 455
 456     memset(start_req, 0, BT_AUDIO_IPC_PACKET_SIZE);
 457     start_req->h.msg_type = BT_STREAMSTART_REQ;
 458
 459     e = bt_audioservice_send(u->audioservice_fd, &start_req->h);
 460     if (e < 0) {
 461         pa_log_error("failed to send BT_STREAMSTART_REQ");
 462         return e;
 463     }
 464
 465     e = bt_audioservice_expect(u->audioservice_fd, &rsp_hdr->msg_h, BT_STREAMSTART_RSP);
 466     if (e < 0) {
 467         pa_log_error("failed to expect BT_STREAMSTART_RSP");
 468         return e;
 469     }
 470
 471     if (rsp_hdr->posix_errno != 0) {
 472         pa_log_error("BT_START failed : %s(%d)", pa_cstrerror(rsp_hdr->posix_errno), rsp_hdr->posix_errno);
 473         return -rsp_hdr->posix_errno;
 474     }
 475
 476     e = bt_audioservice_expect(u->audioservice_fd, &streamfd_ind->h, BT_STREAMFD_IND);
 477     if (e < 0) {
 478         pa_log_error("failed to expect BT_STREAMFD_IND");
 479         return e;
 480     }
 481
 482     if (u->stream_fd >= 0)
 483         pa_close(u->stream_fd);
 484
 485     u->stream_fd = bt_audio_service_get_data_fd(u->audioservice_fd);
 486     if (u->stream_fd < 0) {
 487         pa_log_error("failed to get data fd");
 488         return -errno;
 489     }
 490
 491 //    if (u->transport == BT_CAPABILITIES_TRANSPORT_A2DP) {
 492 //        opt_name = SO_SNDTIMEO;
 493 //        if (setsockopt(u->stream_fd, SOL_SOCKET, opt_name, &t, sizeof(t)) < 0) {
 494 //            pa_log_error("failed to set socket options for A2DP");
 495 //            return -errno;
 496 //        }
 497 //    }
 498 //    else {
 499 //        opt_name = SCO_TXBUFS;
 500 //        if (setsockopt(u->stream_fd, SOL_SCO, opt_name, &period_count, sizeof(period_count)) == 0)
 501 //            return 0;
 502 //        opt_name = SO_SNDBUF;
 503 //        if (setsockopt(u->stream_fd, SOL_SCO, opt_name, &period_count, sizeof(period_count)) == 0)
 504 //            return 0;
 505 //        /* FIXME : handle error codes */
 506 //    }
 507
 508     return 0;
 509 }
 510
 511 static int bt_hw_constraint(struct userdata *u) {
 512     /*TODO: A2DP */
 513     u->ss.format = PA_SAMPLE_S16LE;
 514     u->ss.rate = 8000;
 515     u->ss.channels = 1;
 516     return 0;
 517 }
 518
 519 static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
 520     struct userdata *u = PA_SINK(o)->userdata;
 521
 522     switch (code) {
 523
 524         case PA_SINK_MESSAGE_SET_STATE:
 525             switch ((pa_sink_state_t) PA_PTR_TO_UINT(data)) {
 526                 case PA_SINK_SUSPENDED:
 527                     pa_assert(PA_SINK_IS_OPENED(u->sink->thread_info.state));
 528                     pa_smoother_pause(u->smoother, pa_rtclock_usec());
 529                     break;
 530                 case PA_SINK_IDLE:
 531                 case PA_SINK_RUNNING:
 532                     if (u->sink->thread_info.state == PA_SINK_SUSPENDED)
 533                         pa_smoother_resume(u->smoother, pa_rtclock_usec());
 534                     break;
 535                 case PA_SINK_UNLINKED:
 536                 case PA_SINK_INIT:
 537                     ;
 538             }
 539             break;
 540
 541         case PA_SINK_MESSAGE_GET_LATENCY: {
 542             pa_usec_t w, r;
 543             r = pa_smoother_get(u->smoother, pa_rtclock_usec());
 544             w = pa_bytes_to_usec(u->offset + u->memchunk.length, &u->sink->sample_spec);
 545             *((pa_usec_t*) data) = w > r ? w - r : 0;
 546             break;
 547         }
 548
 549     }
 550
 551     return pa_sink_process_msg(o, code, data, offset, chunk);
 552 }
 553
 554 static void thread_func(void *userdata) {
 555     struct userdata *u = userdata;
 556     int write_type = 0;
 557
 558     pa_assert(u);
 559
 560     pa_log/*_debug*/("Thread starting up");
 561
 562     pa_thread_mq_install(&u->thread_mq);
 563     pa_rtpoll_install(u->rtpoll);
 564
 565     pa_smoother_set_time_offset(u->smoother, pa_rtclock_usec());
 566
 567     for (;;) {
 568         int ret;
 569
 570         if (PA_SINK_IS_OPENED(u->sink->thread_info.state))
 571             if (u->sink->thread_info.rewind_requested)
 572                 pa_sink_process_rewind(u->sink, 0);
 573
 574         if (u->rtpoll_item) {
 575             struct pollfd *pollfd;
 576             pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, NULL);
 577
 578             /* Render some data and write it to the fifo */
 579             if (PA_SINK_IS_OPENED(u->sink->thread_info.state) && pollfd->revents) {
 580                 pa_usec_t usec;
 581                 int64_t n;
 582
 583                 for (;;) {
 584                     ssize_t l;
 585                     void *p;
 586
 587                     if (u->memchunk.length <= 0)
 588                         pa_sink_render(u->sink, u->block_size, &u->memchunk);
 589
 590                     pa_assert(u->memchunk.length > 0);
 591
 592                     p = pa_memblock_acquire(u->memchunk.memblock);
 593                     l = pa_write(u->stream_fd, (uint8_t*) p + u->memchunk.index, u->memchunk.length, &write_type);
 594                     pa_memblock_release(u->memchunk.memblock);
 595
 596                     pa_assert(l != 0);
 597
 598                     if (l < 0) {
 599
 600                         if (errno == EINTR)
 601                             continue;
 602                         else if (errno == EAGAIN) {
 603
 604                             /* OK, we filled all socket buffers up
 605                              * now. */
 606                             goto filled_up;
 607
 608                         } else {
 609                             pa_log("Failed to write data to FIFO: %s", pa_cstrerror(errno));
 610                             goto fail;
 611                         }
 612
 613                     } else {
 614                         u->offset += l;
 615
 616                         u->memchunk.index += l;
 617                         u->memchunk.length -= l;
 618
 619                         if (u->memchunk.length <= 0) {
 620                             pa_memblock_unref(u->memchunk.memblock);
 621                             pa_memchunk_reset(&u->memchunk);
 622                         }
 623
 624                         pollfd->revents = 0;
 625
 626                         if (u->memchunk.length > 0)
 627
 628                             /* OK, we wrote less that we asked for,
 629                              * hence we can assume that the socket
 630                              * buffers are full now */
 631                             goto filled_up;
 632                     }
 633                 }
 634
 635             filled_up:
 636
 637                 /* At this spot we know that the socket buffers are
 638                  * fully filled up. This is the best time to estimate
 639                  * the playback position of the server */
 640
 641                 n = u->offset;
 642
 643 //#ifdef SIOCOUTQ
 644 //                {
 645 //                    int l;
 646 //                    if (ioctl(u->fd, SIOCOUTQ, &l) >= 0 && l > 0)
 647 //                        n -= l;
 648 //                }
 649 //#endif
 650
 651                 usec = pa_bytes_to_usec(n, &u->sink->sample_spec);
 652
 653                 if (usec > u->latency)
 654                     usec -= u->latency;
 655                 else
 656                     usec = 0;
 657
 658                 pa_smoother_put(u->smoother, pa_rtclock_usec(), usec);
 659             }
 660
 661             /* Hmm, nothing to do. Let's sleep */
 662             pollfd->events = PA_SINK_IS_OPENED(u->sink->thread_info.state) ? POLLOUT : 0;
 663         }
 664
 665         if ((ret = pa_rtpoll_run(u->rtpoll, TRUE)) < 0)
 666             goto fail;
 667
 668         if (ret == 0)
 669             goto finish;
 670
 671         if (u->rtpoll_item) {
 672             struct pollfd* pollfd;
 673
 674             pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, NULL);
 675
 676             if (pollfd->revents & ~POLLOUT) {
 677                 pa_log("FIFO shutdown.");
 678                 goto fail;
 679             }
 680         }
 681     }
 682
 683 fail:
 684     /* If this was no regular exit from the loop we have to continue
 685      * processing messages until we received PA_MESSAGE_SHUTDOWN */
 686     pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
 687     pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
 688
 689 finish:
 690     pa_log_debug("Thread shutting down");
 691 }
 692
 693 int pa__init(pa_module* m) {
 694     int e;
 695     const char *rate, *channels;
 696     pa_modargs *ma;
 697     pa_sink_new_data data;
 698     struct userdata *u;
 699
 700     pa_assert(m);
 701     m->userdata = u = pa_xnew0(struct userdata, 1);
 702     u->module = m;
 703     u->core = m->core;
 704     u->audioservice_fd = -1;
 705     u->stream_fd = -1;
 706     u->transport = -1;
 707     u->offset = 0;
 708     u->latency = 0;
 709     u->smoother = pa_smoother_new(PA_USEC_PER_SEC, PA_USEC_PER_SEC*2, TRUE, 10);
 710     pa_memchunk_reset(&u->memchunk);
 711     u->rtpoll = pa_rtpoll_new();
 712     pa_thread_mq_init(&u->thread_mq, u->core->mainloop, u->rtpoll);
 713     u->rtpoll_item = NULL;
 714
 715     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 716         pa_log_error("failed to parse module arguments");
 717         goto fail;
 718     }
 719     if (!(u->name = pa_xstrdup(pa_modargs_get_value(ma, "name", DEFAULT_SINK_NAME)))) {
 720         pa_log_error("failed to get device name from module arguments");
 721         goto fail;
 722     }
 723     if (!(u->addr = pa_xstrdup(pa_modargs_get_value(ma, "addr", NULL)))) {
 724         pa_log_error("failed to get device address from module arguments");
 725         goto fail;
 726     }
 727     if (!(u->profile = pa_xstrdup(pa_modargs_get_value(ma, "profile", NULL)))) {
 728         pa_log_error("failed to get profile from module arguments");
 729         goto fail;
 730     }
 731     if (pa_modargs_get_value_u32(ma, "rate", &u->rate) < 0) {
 732         pa_log_error("failed to get rate from module arguments");
 733         goto fail;
 734     }
 735     if (pa_modargs_get_value_u32(ma, "channels", &u->channels) < 0) {
 736         pa_log_error("failed to get channels from module arguments");
 737         goto fail;
 738     }
 739     pa_log("Loading module-bt-device for %s (%s), profile %s", u->name, u->addr, u->profile);
 740
 741     /* connect to the bluez audio service */
 742     u->audioservice_fd = bt_audio_service_open();
 743     if (u->audioservice_fd <= 0) {
 744         pa_log_error("couldn't connect to bluetooth audio service");
 745         goto fail;
 746     }
 747
 748     /* queries device capabilities */
 749     e = bt_getcaps(u);
 750     if (e < 0) {
 751         pa_log_error("failed to get device capabilities");
 752         goto fail;
 753     }
 754
 755     /* configures the connection */
 756     e = bt_setconf(u);
 757     if (e < 0) {
 758         pa_log_error("failed to set config");
 759         goto fail;
 760     }
 761
 762     /* gets the device socket */
 763     e = bt_getstreamfd(u);
 764     if (e < 0) {
 765         pa_log_error("failed to get stream fd (%d)", e);
 766         goto fail;
 767     }
 768
 769     /* configure hw supported sample specs */
 770     e = bt_hw_constraint(u);
 771     if (e < 0) {
 772         pa_log_error("failed to configure sample spec");
 773         goto fail;
 774     }
 775
 776     /* create sink */
 777     pa_sink_new_data_init(&data);
 778     data.driver = __FILE__;
 779     data.module = m;
 780     pa_sink_new_data_set_name(&data, u->name);
 781     pa_sink_new_data_set_sample_spec(&data, &u->ss);
 782     pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, u->name);
 783     pa_proplist_setf(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Bluetooth sink '%s' (%s)", u->name, u->addr);
 784     u->sink = pa_sink_new(m->core, &data, PA_SINK_HARDWARE|PA_SINK_LATENCY|PA_SINK_NETWORK);
 785     pa_sink_new_data_done(&data);
 786     if (!u->sink) {
 787         pa_log_error("failed to create sink");
 788         goto fail;
 789     }
 790     u->sink->userdata = u;
 791     u->sink->parent.process_msg = sink_process_msg;
 792     pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
 793     pa_sink_set_rtpoll(u->sink, u->rtpoll);
 794
 795     /* start rt thread */
 796     if (!(u->thread = pa_thread_new(thread_func, u))) {
 797         pa_log_error("failed to create thread");
 798         goto fail;
 799     }
 800     pa_sink_put(u->sink);
 801
 802     pa_modargs_free(ma);
 803     return 0;
 804
 805 fail:
 806     if (ma)
 807         pa_modargs_free(ma);
 808     pa__done(m);
 809     return -1;
 810 }
 811
 812 void pa__done(pa_module *m) {
 813     pa_log("Unloading module-bt-device");
 814 }
 815