2 * Copyright (C) 2013 Intel Corporation
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
24 #include <sys/socket.h>
28 #include <hardware/audio.h>
29 #include <hardware/hardware.h>
31 #include "audio-msg.h"
34 #include "../profiles/audio/a2dp-codecs.h"
36 static const uint8_t a2dp_src_uuid[] = {
37 0x00, 0x00, 0x11, 0x0a, 0x00, 0x00, 0x10, 0x00,
38 0x80, 0x00, 0x00, 0x80, 0x5f, 0x9b, 0x34, 0xfb };
40 static int listen_sk = -1;
41 static int audio_sk = -1;
42 static bool close_thread = false;
44 static pthread_t ipc_th = 0;
45 static pthread_mutex_t close_mutex = PTHREAD_MUTEX_INITIALIZER;
46 static pthread_mutex_t sk_mutex = PTHREAD_MUTEX_INITIALIZER;
48 struct audio_input_config {
51 audio_format_t format;
58 static int sbc_get_presets(struct audio_preset *preset, size_t *len);
59 static int sbc_init(struct audio_preset *preset, void **codec_data);
60 static int sbc_cleanup(void *codec_data);
61 static int sbc_get_config(void *codec_data,
62 struct audio_input_config *config);
67 int (*get_presets) (struct audio_preset *preset, size_t *len);
69 int (*init) (struct audio_preset *preset, void **codec_data);
70 int (*cleanup) (void *codec_data);
71 int (*get_config) (void *codec_data,
72 struct audio_input_config *config);
73 ssize_t (*write_data) (void *codec_data, const void *buffer,
77 static const struct audio_codec audio_codecs[] = {
79 .type = A2DP_CODEC_SBC,
81 .get_presets = sbc_get_presets,
84 .cleanup = sbc_cleanup,
85 .get_config = sbc_get_config,
89 #define NUM_CODECS (sizeof(audio_codecs) / sizeof(audio_codecs[0]))
91 #define MAX_AUDIO_ENDPOINTS NUM_CODECS
93 struct audio_endpoint {
95 const struct audio_codec *codec;
100 static struct audio_endpoint audio_endpoints[MAX_AUDIO_ENDPOINTS];
103 AUDIO_A2DP_STATE_NONE,
104 AUDIO_A2DP_STATE_STANDBY,
105 AUDIO_A2DP_STATE_SUSPENDED,
106 AUDIO_A2DP_STATE_STARTED
109 struct a2dp_stream_out {
110 struct audio_stream_out stream;
112 struct audio_endpoint *ep;
113 enum a2dp_state_t audio_state;
114 struct audio_input_config cfg;
117 struct a2dp_audio_dev {
118 struct audio_hw_device dev;
119 struct a2dp_stream_out *out;
122 static const a2dp_sbc_t sbc_presets[] = {
124 .frequency = SBC_SAMPLING_FREQ_44100 | SBC_SAMPLING_FREQ_48000,
125 .channel_mode = SBC_CHANNEL_MODE_MONO |
126 SBC_CHANNEL_MODE_DUAL_CHANNEL |
127 SBC_CHANNEL_MODE_STEREO |
128 SBC_CHANNEL_MODE_JOINT_STEREO,
129 .subbands = SBC_SUBBANDS_4 | SBC_SUBBANDS_8,
130 .allocation_method = SBC_ALLOCATION_SNR |
131 SBC_ALLOCATION_LOUDNESS,
132 .block_length = SBC_BLOCK_LENGTH_4 | SBC_BLOCK_LENGTH_8 |
133 SBC_BLOCK_LENGTH_12 | SBC_BLOCK_LENGTH_16,
134 .min_bitpool = MIN_BITPOOL,
135 .max_bitpool = MAX_BITPOOL
138 .frequency = SBC_SAMPLING_FREQ_44100,
139 .channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO,
140 .subbands = SBC_SUBBANDS_8,
141 .allocation_method = SBC_ALLOCATION_LOUDNESS,
142 .block_length = SBC_BLOCK_LENGTH_16,
143 .min_bitpool = MIN_BITPOOL,
144 .max_bitpool = MAX_BITPOOL
147 .frequency = SBC_SAMPLING_FREQ_48000,
148 .channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO,
149 .subbands = SBC_SUBBANDS_8,
150 .allocation_method = SBC_ALLOCATION_LOUDNESS,
151 .block_length = SBC_BLOCK_LENGTH_16,
152 .min_bitpool = MIN_BITPOOL,
153 .max_bitpool = MAX_BITPOOL
157 static int sbc_get_presets(struct audio_preset *preset, size_t *len)
162 uint8_t *ptr = (uint8_t *) preset;
163 size_t preset_size = sizeof(*preset) + sizeof(a2dp_sbc_t);
167 count = sizeof(sbc_presets) / sizeof(sbc_presets[0]);
169 for (i = 0; i < count; i++) {
170 preset = (struct audio_preset *) ptr;
172 if (new_len + preset_size > *len)
175 preset->len = sizeof(a2dp_sbc_t);
176 memcpy(preset->data, &sbc_presets[i], preset->len);
178 new_len += preset_size;
187 static int sbc_init(struct audio_preset *preset, void **codec_data)
189 struct sbc_data *sbc_data;
193 if (preset->len != sizeof(a2dp_sbc_t)) {
194 DBG("preset size mismatch");
195 return AUDIO_STATUS_FAILED;
198 sbc_data = calloc(sizeof(struct sbc_data), 1);
200 memcpy(&sbc_data->sbc, preset->data, preset->len);
202 *codec_data = sbc_data;
204 return AUDIO_STATUS_SUCCESS;
207 static int sbc_cleanup(void *codec_data)
213 return AUDIO_STATUS_SUCCESS;
216 static int sbc_get_config(void *codec_data,
217 struct audio_input_config *config)
219 struct sbc_data *sbc_data = (struct sbc_data *) codec_data;
221 switch (sbc_data->sbc.frequency) {
222 case SBC_SAMPLING_FREQ_16000:
223 config->rate = 16000;
225 case SBC_SAMPLING_FREQ_32000:
226 config->rate = 32000;
228 case SBC_SAMPLING_FREQ_44100:
229 config->rate = 44100;
231 case SBC_SAMPLING_FREQ_48000:
232 config->rate = 48000;
235 return AUDIO_STATUS_FAILED;
237 config->channels = sbc_data->sbc.channel_mode == SBC_CHANNEL_MODE_MONO ?
238 AUDIO_CHANNEL_OUT_MONO :
239 AUDIO_CHANNEL_OUT_STEREO;
240 config->format = AUDIO_FORMAT_PCM_16_BIT;
242 return AUDIO_STATUS_SUCCESS;
245 static void audio_ipc_cleanup(void)
248 shutdown(audio_sk, SHUT_RDWR);
253 static int audio_ipc_cmd(uint8_t service_id, uint8_t opcode, uint16_t len,
254 void *param, size_t *rsp_len, void *rsp, int *fd)
260 char cmsgbuf[CMSG_SPACE(sizeof(int))];
262 size_t s_len = sizeof(s);
265 error("audio: Invalid cmd socket passed to audio_ipc_cmd");
269 if (!rsp || !rsp_len) {
270 memset(&s, 0, s_len);
275 memset(&msg, 0, sizeof(msg));
276 memset(&cmd, 0, sizeof(cmd));
278 cmd.service_id = service_id;
282 iv[0].iov_base = &cmd;
283 iv[0].iov_len = sizeof(cmd);
285 iv[1].iov_base = param;
291 pthread_mutex_lock(&sk_mutex);
293 ret = sendmsg(audio_sk, &msg, 0);
295 error("audio: Sending command failed:%s", strerror(errno));
296 pthread_mutex_unlock(&sk_mutex);
300 /* socket was shutdown */
302 error("audio: Command socket closed");
306 memset(&msg, 0, sizeof(msg));
307 memset(&cmd, 0, sizeof(cmd));
309 iv[0].iov_base = &cmd;
310 iv[0].iov_len = sizeof(cmd);
312 iv[1].iov_base = rsp;
313 iv[1].iov_len = *rsp_len;
319 memset(cmsgbuf, 0, sizeof(cmsgbuf));
320 msg.msg_control = cmsgbuf;
321 msg.msg_controllen = sizeof(cmsgbuf);
324 ret = recvmsg(audio_sk, &msg, 0);
326 error("audio: Receiving command response failed:%s",
328 pthread_mutex_unlock(&sk_mutex);
332 pthread_mutex_unlock(&sk_mutex);
334 if (ret < (ssize_t) sizeof(cmd)) {
335 error("audio: Too small response received(%zd bytes)", ret);
339 if (cmd.service_id != service_id) {
340 error("audio: Invalid service id (%u vs %u)", cmd.service_id,
345 if (ret != (ssize_t) (sizeof(cmd) + cmd.len)) {
346 error("audio: Malformed response received(%zd bytes)", ret);
350 if (cmd.opcode != opcode && cmd.opcode != AUDIO_OP_STATUS) {
351 error("audio: Invalid opcode received (%u vs %u)",
356 if (cmd.opcode == AUDIO_OP_STATUS) {
357 struct hal_status *s = rsp;
359 if (sizeof(*s) != cmd.len) {
360 error("audio: Invalid status length");
364 if (s->code == AUDIO_STATUS_SUCCESS) {
365 error("audio: Invalid success status response");
372 /* Receive auxiliary data in msg */
374 struct cmsghdr *cmsg;
378 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
379 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
380 if (cmsg->cmsg_level == SOL_SOCKET
381 && cmsg->cmsg_type == SCM_RIGHTS) {
382 memcpy(fd, CMSG_DATA(cmsg), sizeof(int));
391 return AUDIO_STATUS_SUCCESS;
394 /* Some serious issue happen on IPC - recover */
395 shutdown(audio_sk, SHUT_RDWR);
397 return AUDIO_STATUS_FAILED;
400 static int ipc_open_cmd(const struct audio_codec *codec)
402 uint8_t buf[BLUEZ_AUDIO_MTU];
403 struct audio_cmd_open *cmd = (struct audio_cmd_open *) buf;
404 struct audio_rsp_open rsp;
405 size_t cmd_len = sizeof(buf) - sizeof(*cmd);
406 size_t rsp_len = sizeof(rsp);
411 memcpy(cmd->uuid, a2dp_src_uuid, sizeof(a2dp_src_uuid));
413 cmd->codec = codec->type;
414 cmd->presets = codec->get_presets(cmd->preset, &cmd_len);
416 cmd_len += sizeof(*cmd);
418 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_OPEN, cmd_len, cmd,
419 &rsp_len, &rsp, NULL);
421 if (result != AUDIO_STATUS_SUCCESS)
427 static int ipc_close_cmd(uint8_t endpoint_id)
429 struct audio_cmd_close cmd;
434 cmd.id = endpoint_id;
436 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_CLOSE,
437 sizeof(cmd), &cmd, NULL, NULL, NULL);
442 static int ipc_open_stream_cmd(uint8_t endpoint_id,
443 struct audio_preset **caps)
445 char buf[BLUEZ_AUDIO_MTU];
446 struct audio_cmd_open_stream cmd;
447 struct audio_rsp_open_stream *rsp =
448 (struct audio_rsp_open_stream *) &buf;
449 size_t rsp_len = sizeof(buf);
455 return AUDIO_STATUS_FAILED;
457 cmd.id = endpoint_id;
459 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_OPEN_STREAM,
460 sizeof(cmd), &cmd, &rsp_len, rsp, NULL);
462 if (result == AUDIO_STATUS_SUCCESS) {
463 size_t buf_len = sizeof(struct audio_preset) +
465 *caps = malloc(buf_len);
466 memcpy(*caps, &rsp->preset, buf_len);
474 static int ipc_close_stream_cmd(uint8_t endpoint_id)
476 struct audio_cmd_close_stream cmd;
481 cmd.id = endpoint_id;
483 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_CLOSE_STREAM,
484 sizeof(cmd), &cmd, NULL, NULL, NULL);
489 static int ipc_resume_stream_cmd(uint8_t endpoint_id)
491 struct audio_cmd_resume_stream cmd;
496 cmd.id = endpoint_id;
498 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_RESUME_STREAM,
499 sizeof(cmd), &cmd, NULL, NULL, NULL);
504 static int ipc_suspend_stream_cmd(uint8_t endpoint_id)
506 struct audio_cmd_suspend_stream cmd;
511 cmd.id = endpoint_id;
513 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_SUSPEND_STREAM,
514 sizeof(cmd), &cmd, NULL, NULL, NULL);
519 static int register_endpoints(void)
521 struct audio_endpoint *ep = &audio_endpoints[0];
524 for (i = 0; i < NUM_CODECS; i++, ep++) {
525 const struct audio_codec *codec = &audio_codecs[i];
527 ep->id = ipc_open_cmd(codec);
530 return AUDIO_STATUS_FAILED;
533 ep->codec_data = NULL;
537 return AUDIO_STATUS_SUCCESS;
540 static void unregister_endpoints(void)
544 for (i = 0; i < MAX_AUDIO_ENDPOINTS; i++) {
545 struct audio_endpoint *ep = &audio_endpoints[i];
548 ipc_close_cmd(ep->id);
549 memset(ep, 0, sizeof(*ep));
554 static ssize_t out_write(struct audio_stream_out *stream, const void *buffer,
557 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
559 /* We can auto-start only from standby */
560 if (out->audio_state == AUDIO_A2DP_STATE_STANDBY) {
561 DBG("stream in standby, auto-start");
563 if (ipc_resume_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
566 out->audio_state = AUDIO_A2DP_STATE_STARTED;
569 if (out->audio_state != AUDIO_A2DP_STATE_STARTED) {
570 DBG("stream not started");
574 /* TODO: encode data using codec */
579 static uint32_t out_get_sample_rate(const struct audio_stream *stream)
581 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
585 return out->cfg.rate;
588 static int out_set_sample_rate(struct audio_stream *stream, uint32_t rate)
590 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
594 if (rate != out->cfg.rate) {
595 DBG("cannot set sample rate to %d", rate);
602 static size_t out_get_buffer_size(const struct audio_stream *stream)
608 static uint32_t out_get_channels(const struct audio_stream *stream)
610 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
614 return out->cfg.channels;
617 static audio_format_t out_get_format(const struct audio_stream *stream)
619 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
623 return out->cfg.format;
626 static int out_set_format(struct audio_stream *stream, audio_format_t format)
632 static int out_standby(struct audio_stream *stream)
634 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
638 if (out->audio_state == AUDIO_A2DP_STATE_STARTED) {
639 if (ipc_suspend_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
641 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
647 static int out_dump(const struct audio_stream *stream, int fd)
653 static int out_set_parameters(struct audio_stream *stream, const char *kvpairs)
655 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
659 bool enter_suspend = false;
660 bool exit_suspend = false;
664 str = strdup(kvpairs);
665 kvpair = strtok_r(str, ";", &saveptr);
667 for (; kvpair && *kvpair; kvpair = strtok_r(NULL, ";", &saveptr)) {
670 keyval = strchr(kvpair, '=');
677 if (!strcmp(kvpair, "closing")) {
678 if (!strcmp(keyval, "true"))
679 out->audio_state = AUDIO_A2DP_STATE_NONE;
680 } else if (!strcmp(kvpair, "A2dpSuspended")) {
681 if (!strcmp(keyval, "true"))
682 enter_suspend = true;
690 if (enter_suspend && out->audio_state == AUDIO_A2DP_STATE_STARTED) {
691 if (ipc_suspend_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
693 out->audio_state = AUDIO_A2DP_STATE_SUSPENDED;
696 if (exit_suspend && out->audio_state == AUDIO_A2DP_STATE_SUSPENDED)
697 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
702 static char *out_get_parameters(const struct audio_stream *stream,
709 static uint32_t out_get_latency(const struct audio_stream_out *stream)
715 static int out_set_volume(struct audio_stream_out *stream, float left,
719 /* volume controlled in audioflinger mixer (digital) */
723 static int out_get_render_position(const struct audio_stream_out *stream,
724 uint32_t *dsp_frames)
730 static int out_add_audio_effect(const struct audio_stream *stream,
731 effect_handle_t effect)
737 static int out_remove_audio_effect(const struct audio_stream *stream,
738 effect_handle_t effect)
744 static uint32_t in_get_sample_rate(const struct audio_stream *stream)
750 static int in_set_sample_rate(struct audio_stream *stream, uint32_t rate)
756 static size_t in_get_buffer_size(const struct audio_stream *stream)
762 static uint32_t in_get_channels(const struct audio_stream *stream)
768 static audio_format_t in_get_format(const struct audio_stream *stream)
774 static int in_set_format(struct audio_stream *stream, audio_format_t format)
780 static int in_standby(struct audio_stream *stream)
786 static int in_dump(const struct audio_stream *stream, int fd)
792 static int in_set_parameters(struct audio_stream *stream, const char *kvpairs)
798 static char *in_get_parameters(const struct audio_stream *stream,
805 static int in_set_gain(struct audio_stream_in *stream, float gain)
811 static ssize_t in_read(struct audio_stream_in *stream, void *buffer,
818 static uint32_t in_get_input_frames_lost(struct audio_stream_in *stream)
824 static int in_add_audio_effect(const struct audio_stream *stream,
825 effect_handle_t effect)
831 static int in_remove_audio_effect(const struct audio_stream *stream,
832 effect_handle_t effect)
838 static int audio_open_output_stream(struct audio_hw_device *dev,
839 audio_io_handle_t handle,
840 audio_devices_t devices,
841 audio_output_flags_t flags,
842 struct audio_config *config,
843 struct audio_stream_out **stream_out)
846 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
847 struct a2dp_stream_out *out;
848 struct audio_preset *preset;
849 const struct audio_codec *codec;
851 out = calloc(1, sizeof(struct a2dp_stream_out));
857 out->stream.common.get_sample_rate = out_get_sample_rate;
858 out->stream.common.set_sample_rate = out_set_sample_rate;
859 out->stream.common.get_buffer_size = out_get_buffer_size;
860 out->stream.common.get_channels = out_get_channels;
861 out->stream.common.get_format = out_get_format;
862 out->stream.common.set_format = out_set_format;
863 out->stream.common.standby = out_standby;
864 out->stream.common.dump = out_dump;
865 out->stream.common.set_parameters = out_set_parameters;
866 out->stream.common.get_parameters = out_get_parameters;
867 out->stream.common.add_audio_effect = out_add_audio_effect;
868 out->stream.common.remove_audio_effect = out_remove_audio_effect;
869 out->stream.get_latency = out_get_latency;
870 out->stream.set_volume = out_set_volume;
871 out->stream.write = out_write;
872 out->stream.get_render_position = out_get_render_position;
874 /* TODO: for now we always use endpoint 0 */
875 out->ep = &audio_endpoints[0];
877 if (ipc_open_stream_cmd(out->ep->id, &preset) != AUDIO_STATUS_SUCCESS)
883 codec = out->ep->codec;
885 codec->init(preset, &out->ep->codec_data);
886 codec->get_config(out->ep->codec_data, &out->cfg);
888 DBG("rate=%d channels=%d format=%d", out->cfg.rate,
889 out->cfg.channels, out->cfg.format);
893 *stream_out = &out->stream;
896 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
906 static void audio_close_output_stream(struct audio_hw_device *dev,
907 struct audio_stream_out *stream)
909 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
910 struct audio_endpoint *ep = a2dp_dev->out->ep;
914 ipc_close_stream_cmd(ep->id);
916 ep->codec->cleanup(ep->codec_data);
917 ep->codec_data = NULL;
920 a2dp_dev->out = NULL;
923 static int audio_set_parameters(struct audio_hw_device *dev,
930 static char *audio_get_parameters(const struct audio_hw_device *dev,
937 static int audio_init_check(const struct audio_hw_device *dev)
943 static int audio_set_voice_volume(struct audio_hw_device *dev, float volume)
949 static int audio_set_master_volume(struct audio_hw_device *dev, float volume)
955 static int audio_set_mode(struct audio_hw_device *dev, int mode)
961 static int audio_set_mic_mute(struct audio_hw_device *dev, bool state)
967 static int audio_get_mic_mute(const struct audio_hw_device *dev, bool *state)
973 static size_t audio_get_input_buffer_size(const struct audio_hw_device *dev,
974 const struct audio_config *config)
980 static int audio_open_input_stream(struct audio_hw_device *dev,
981 audio_io_handle_t handle,
982 audio_devices_t devices,
983 struct audio_config *config,
984 struct audio_stream_in **stream_in)
986 struct audio_stream_in *in;
990 in = calloc(1, sizeof(struct audio_stream_in));
994 in->common.get_sample_rate = in_get_sample_rate;
995 in->common.set_sample_rate = in_set_sample_rate;
996 in->common.get_buffer_size = in_get_buffer_size;
997 in->common.get_channels = in_get_channels;
998 in->common.get_format = in_get_format;
999 in->common.set_format = in_set_format;
1000 in->common.standby = in_standby;
1001 in->common.dump = in_dump;
1002 in->common.set_parameters = in_set_parameters;
1003 in->common.get_parameters = in_get_parameters;
1004 in->common.add_audio_effect = in_add_audio_effect;
1005 in->common.remove_audio_effect = in_remove_audio_effect;
1006 in->set_gain = in_set_gain;
1008 in->get_input_frames_lost = in_get_input_frames_lost;
1015 static void audio_close_input_stream(struct audio_hw_device *dev,
1016 struct audio_stream_in *stream_in)
1022 static int audio_dump(const audio_hw_device_t *device, int fd)
1028 static int audio_close(hw_device_t *device)
1030 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *)device;
1034 pthread_mutex_lock(&close_mutex);
1035 audio_ipc_cleanup();
1036 close_thread = true;
1037 pthread_mutex_unlock(&close_mutex);
1039 pthread_join(ipc_th, NULL);
1048 static void *ipc_handler(void *data)
1056 DBG("Waiting for connection ...");
1057 audio_sk = accept(listen_sk, NULL, NULL);
1060 error("audio: Failed to accept socket: %d (%s)", err,
1065 DBG("Audio IPC: Connected");
1067 if (register_endpoints() != AUDIO_STATUS_SUCCESS) {
1068 error("audio: Failed to register endpoints");
1070 unregister_endpoints();
1072 shutdown(audio_sk, SHUT_RDWR);
1076 memset(&pfd, 0, sizeof(pfd));
1078 pfd.events = POLLHUP | POLLERR | POLLNVAL;
1080 /* Check if socket is still alive. Empty while loop.*/
1081 while (poll(&pfd, 1, -1) < 0 && errno == EINTR);
1083 if (pfd.revents & (POLLHUP | POLLERR | POLLNVAL)) {
1084 info("Audio HAL: Socket closed");
1088 /*Check if audio_dev is closed */
1089 pthread_mutex_lock(&close_mutex);
1090 done = close_thread;
1091 close_thread = false;
1092 pthread_mutex_unlock(&close_mutex);
1095 unregister_endpoints();
1097 info("Closing Audio IPC thread");
1101 static int audio_ipc_init(void)
1103 struct sockaddr_un addr;
1109 sk = socket(PF_LOCAL, SOCK_SEQPACKET, 0);
1112 error("audio: Failed to create socket: %d (%s)", err,
1117 memset(&addr, 0, sizeof(addr));
1118 addr.sun_family = AF_UNIX;
1120 memcpy(addr.sun_path, BLUEZ_AUDIO_SK_PATH,
1121 sizeof(BLUEZ_AUDIO_SK_PATH));
1123 if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1125 error("audio: Failed to bind socket: %d (%s)", err,
1130 if (listen(sk, 1) < 0) {
1132 error("audio: Failed to listen on the socket: %d (%s)", err,
1139 err = pthread_create(&ipc_th, NULL, ipc_handler, NULL);
1143 error("audio: Failed to start Audio IPC thread: %d (%s)",
1144 err, strerror(err));
1155 static int audio_open(const hw_module_t *module, const char *name,
1156 hw_device_t **device)
1158 struct a2dp_audio_dev *a2dp_dev;
1163 if (strcmp(name, AUDIO_HARDWARE_INTERFACE)) {
1164 error("audio: interface %s not matching [%s]", name,
1165 AUDIO_HARDWARE_INTERFACE);
1169 err = audio_ipc_init();
1173 a2dp_dev = calloc(1, sizeof(struct a2dp_audio_dev));
1177 a2dp_dev->dev.common.tag = HARDWARE_DEVICE_TAG;
1178 a2dp_dev->dev.common.version = AUDIO_DEVICE_API_VERSION_CURRENT;
1179 a2dp_dev->dev.common.module = (struct hw_module_t *) module;
1180 a2dp_dev->dev.common.close = audio_close;
1182 a2dp_dev->dev.init_check = audio_init_check;
1183 a2dp_dev->dev.set_voice_volume = audio_set_voice_volume;
1184 a2dp_dev->dev.set_master_volume = audio_set_master_volume;
1185 a2dp_dev->dev.set_mode = audio_set_mode;
1186 a2dp_dev->dev.set_mic_mute = audio_set_mic_mute;
1187 a2dp_dev->dev.get_mic_mute = audio_get_mic_mute;
1188 a2dp_dev->dev.set_parameters = audio_set_parameters;
1189 a2dp_dev->dev.get_parameters = audio_get_parameters;
1190 a2dp_dev->dev.get_input_buffer_size = audio_get_input_buffer_size;
1191 a2dp_dev->dev.open_output_stream = audio_open_output_stream;
1192 a2dp_dev->dev.close_output_stream = audio_close_output_stream;
1193 a2dp_dev->dev.open_input_stream = audio_open_input_stream;
1194 a2dp_dev->dev.close_input_stream = audio_close_input_stream;
1195 a2dp_dev->dev.dump = audio_dump;
1197 /* Note that &a2dp_dev->dev.common is the same pointer as a2dp_dev.
1198 * This results from the structure of following structs:a2dp_audio_dev,
1199 * audio_hw_device. We will rely on this later in the code.*/
1200 *device = &a2dp_dev->dev.common;
1205 static struct hw_module_methods_t hal_module_methods = {
1209 struct audio_module HAL_MODULE_INFO_SYM = {
1211 .tag = HARDWARE_MODULE_TAG,
1214 .id = AUDIO_HARDWARE_MODULE_ID,
1215 .name = "A2DP Bluez HW HAL",
1216 .author = "Intel Corporation",
1217 .methods = &hal_module_methods,