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>
33 #include "audio-msg.h"
36 #include "../profiles/audio/a2dp-codecs.h"
38 static const uint8_t a2dp_src_uuid[] = {
39 0x00, 0x00, 0x11, 0x0a, 0x00, 0x00, 0x10, 0x00,
40 0x80, 0x00, 0x00, 0x80, 0x5f, 0x9b, 0x34, 0xfb };
42 static int listen_sk = -1;
43 static int audio_sk = -1;
44 static bool close_thread = false;
46 static pthread_t ipc_th = 0;
47 static pthread_mutex_t close_mutex = PTHREAD_MUTEX_INITIALIZER;
48 static pthread_mutex_t sk_mutex = PTHREAD_MUTEX_INITIALIZER;
50 #if __BYTE_ORDER == __LITTLE_ENDIAN
61 uint16_t sequence_number;
65 } __attribute__ ((packed));
68 unsigned frame_count:4;
70 unsigned is_last_fragment:1;
71 unsigned is_first_fragment:1;
72 unsigned is_fragmented:1;
73 } __attribute__ ((packed));
75 #elif __BYTE_ORDER == __BIG_ENDIAN
86 uint16_t sequence_number;
90 } __attribute__ ((packed));
93 unsigned is_fragmented:1;
94 unsigned is_first_fragment:1;
95 unsigned is_last_fragment:1;
97 unsigned frame_count:4;
98 } __attribute__ ((packed));
101 #error "Unknown byte order"
104 struct media_packet {
105 struct rtp_header hdr;
106 struct rtp_payload payload;
110 struct audio_input_config {
113 audio_format_t format;
127 unsigned frame_duration;
130 static int sbc_get_presets(struct audio_preset *preset, size_t *len);
131 static int sbc_codec_init(struct audio_preset *preset, uint16_t mtu,
133 static int sbc_cleanup(void *codec_data);
134 static int sbc_get_config(void *codec_data,
135 struct audio_input_config *config);
140 int (*get_presets) (struct audio_preset *preset, size_t *len);
142 int (*init) (struct audio_preset *preset, uint16_t mtu,
144 int (*cleanup) (void *codec_data);
145 int (*get_config) (void *codec_data,
146 struct audio_input_config *config);
147 ssize_t (*write_data) (void *codec_data, const void *buffer,
151 static const struct audio_codec audio_codecs[] = {
153 .type = A2DP_CODEC_SBC,
155 .get_presets = sbc_get_presets,
157 .init = sbc_codec_init,
158 .cleanup = sbc_cleanup,
159 .get_config = sbc_get_config,
163 #define NUM_CODECS (sizeof(audio_codecs) / sizeof(audio_codecs[0]))
165 #define MAX_AUDIO_ENDPOINTS NUM_CODECS
167 struct audio_endpoint {
169 const struct audio_codec *codec;
174 static struct audio_endpoint audio_endpoints[MAX_AUDIO_ENDPOINTS];
177 AUDIO_A2DP_STATE_NONE,
178 AUDIO_A2DP_STATE_STANDBY,
179 AUDIO_A2DP_STATE_SUSPENDED,
180 AUDIO_A2DP_STATE_STARTED
183 struct a2dp_stream_out {
184 struct audio_stream_out stream;
186 struct audio_endpoint *ep;
187 enum a2dp_state_t audio_state;
188 struct audio_input_config cfg;
191 struct a2dp_audio_dev {
192 struct audio_hw_device dev;
193 struct a2dp_stream_out *out;
196 static const a2dp_sbc_t sbc_presets[] = {
198 .frequency = SBC_SAMPLING_FREQ_44100 | SBC_SAMPLING_FREQ_48000,
199 .channel_mode = SBC_CHANNEL_MODE_MONO |
200 SBC_CHANNEL_MODE_DUAL_CHANNEL |
201 SBC_CHANNEL_MODE_STEREO |
202 SBC_CHANNEL_MODE_JOINT_STEREO,
203 .subbands = SBC_SUBBANDS_4 | SBC_SUBBANDS_8,
204 .allocation_method = SBC_ALLOCATION_SNR |
205 SBC_ALLOCATION_LOUDNESS,
206 .block_length = SBC_BLOCK_LENGTH_4 | SBC_BLOCK_LENGTH_8 |
207 SBC_BLOCK_LENGTH_12 | SBC_BLOCK_LENGTH_16,
208 .min_bitpool = MIN_BITPOOL,
209 .max_bitpool = MAX_BITPOOL
212 .frequency = SBC_SAMPLING_FREQ_44100,
213 .channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO,
214 .subbands = SBC_SUBBANDS_8,
215 .allocation_method = SBC_ALLOCATION_LOUDNESS,
216 .block_length = SBC_BLOCK_LENGTH_16,
217 .min_bitpool = MIN_BITPOOL,
218 .max_bitpool = MAX_BITPOOL
221 .frequency = SBC_SAMPLING_FREQ_48000,
222 .channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO,
223 .subbands = SBC_SUBBANDS_8,
224 .allocation_method = SBC_ALLOCATION_LOUDNESS,
225 .block_length = SBC_BLOCK_LENGTH_16,
226 .min_bitpool = MIN_BITPOOL,
227 .max_bitpool = MAX_BITPOOL
231 static int sbc_get_presets(struct audio_preset *preset, size_t *len)
236 uint8_t *ptr = (uint8_t *) preset;
237 size_t preset_size = sizeof(*preset) + sizeof(a2dp_sbc_t);
241 count = sizeof(sbc_presets) / sizeof(sbc_presets[0]);
243 for (i = 0; i < count; i++) {
244 preset = (struct audio_preset *) ptr;
246 if (new_len + preset_size > *len)
249 preset->len = sizeof(a2dp_sbc_t);
250 memcpy(preset->data, &sbc_presets[i], preset->len);
252 new_len += preset_size;
261 static void sbc_init_encoder(struct sbc_data *sbc_data)
263 a2dp_sbc_t *in = &sbc_data->sbc;
264 sbc_t *out = &sbc_data->enc;
268 sbc_init_a2dp(out, 0L, in, sizeof(*in));
270 out->endian = SBC_LE;
271 out->bitpool = in->max_bitpool;
274 static int sbc_codec_init(struct audio_preset *preset, uint16_t mtu,
277 struct sbc_data *sbc_data;
278 size_t hdr_len = sizeof(struct media_packet);
280 size_t out_frame_len;
285 if (preset->len != sizeof(a2dp_sbc_t)) {
286 DBG("preset size mismatch");
287 return AUDIO_STATUS_FAILED;
290 sbc_data = calloc(sizeof(struct sbc_data), 1);
292 memcpy(&sbc_data->sbc, preset->data, preset->len);
294 sbc_init_encoder(sbc_data);
296 in_frame_len = sbc_get_codesize(&sbc_data->enc);
297 out_frame_len = sbc_get_frame_length(&sbc_data->enc);
298 num_frames = (mtu - hdr_len) / out_frame_len;
300 sbc_data->in_frame_len = in_frame_len;
301 sbc_data->in_buf_size = num_frames * in_frame_len;
303 sbc_data->out_buf_size = hdr_len + num_frames * out_frame_len;
304 sbc_data->out_buf = calloc(1, sbc_data->out_buf_size);
306 sbc_data->frame_duration = sbc_get_frame_duration(&sbc_data->enc);
308 *codec_data = sbc_data;
310 return AUDIO_STATUS_SUCCESS;
313 static int sbc_cleanup(void *codec_data)
315 struct sbc_data *sbc_data = (struct sbc_data *) codec_data;
319 sbc_finish(&sbc_data->enc);
320 free(sbc_data->out_buf);
323 return AUDIO_STATUS_SUCCESS;
326 static int sbc_get_config(void *codec_data,
327 struct audio_input_config *config)
329 struct sbc_data *sbc_data = (struct sbc_data *) codec_data;
331 switch (sbc_data->sbc.frequency) {
332 case SBC_SAMPLING_FREQ_16000:
333 config->rate = 16000;
335 case SBC_SAMPLING_FREQ_32000:
336 config->rate = 32000;
338 case SBC_SAMPLING_FREQ_44100:
339 config->rate = 44100;
341 case SBC_SAMPLING_FREQ_48000:
342 config->rate = 48000;
345 return AUDIO_STATUS_FAILED;
347 config->channels = sbc_data->sbc.channel_mode == SBC_CHANNEL_MODE_MONO ?
348 AUDIO_CHANNEL_OUT_MONO :
349 AUDIO_CHANNEL_OUT_STEREO;
350 config->format = AUDIO_FORMAT_PCM_16_BIT;
352 return AUDIO_STATUS_SUCCESS;
355 static void audio_ipc_cleanup(void)
358 shutdown(audio_sk, SHUT_RDWR);
363 static int audio_ipc_cmd(uint8_t service_id, uint8_t opcode, uint16_t len,
364 void *param, size_t *rsp_len, void *rsp, int *fd)
370 char cmsgbuf[CMSG_SPACE(sizeof(int))];
372 size_t s_len = sizeof(s);
375 error("audio: Invalid cmd socket passed to audio_ipc_cmd");
379 if (!rsp || !rsp_len) {
380 memset(&s, 0, s_len);
385 memset(&msg, 0, sizeof(msg));
386 memset(&cmd, 0, sizeof(cmd));
388 cmd.service_id = service_id;
392 iv[0].iov_base = &cmd;
393 iv[0].iov_len = sizeof(cmd);
395 iv[1].iov_base = param;
401 pthread_mutex_lock(&sk_mutex);
403 ret = sendmsg(audio_sk, &msg, 0);
405 error("audio: Sending command failed:%s", strerror(errno));
406 pthread_mutex_unlock(&sk_mutex);
410 /* socket was shutdown */
412 error("audio: Command socket closed");
416 memset(&msg, 0, sizeof(msg));
417 memset(&cmd, 0, sizeof(cmd));
419 iv[0].iov_base = &cmd;
420 iv[0].iov_len = sizeof(cmd);
422 iv[1].iov_base = rsp;
423 iv[1].iov_len = *rsp_len;
429 memset(cmsgbuf, 0, sizeof(cmsgbuf));
430 msg.msg_control = cmsgbuf;
431 msg.msg_controllen = sizeof(cmsgbuf);
434 ret = recvmsg(audio_sk, &msg, 0);
436 error("audio: Receiving command response failed:%s",
438 pthread_mutex_unlock(&sk_mutex);
442 pthread_mutex_unlock(&sk_mutex);
444 if (ret < (ssize_t) sizeof(cmd)) {
445 error("audio: Too small response received(%zd bytes)", ret);
449 if (cmd.service_id != service_id) {
450 error("audio: Invalid service id (%u vs %u)", cmd.service_id,
455 if (ret != (ssize_t) (sizeof(cmd) + cmd.len)) {
456 error("audio: Malformed response received(%zd bytes)", ret);
460 if (cmd.opcode != opcode && cmd.opcode != AUDIO_OP_STATUS) {
461 error("audio: Invalid opcode received (%u vs %u)",
466 if (cmd.opcode == AUDIO_OP_STATUS) {
467 struct hal_status *s = rsp;
469 if (sizeof(*s) != cmd.len) {
470 error("audio: Invalid status length");
474 if (s->code == AUDIO_STATUS_SUCCESS) {
475 error("audio: Invalid success status response");
482 /* Receive auxiliary data in msg */
484 struct cmsghdr *cmsg;
488 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
489 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
490 if (cmsg->cmsg_level == SOL_SOCKET
491 && cmsg->cmsg_type == SCM_RIGHTS) {
492 memcpy(fd, CMSG_DATA(cmsg), sizeof(int));
501 return AUDIO_STATUS_SUCCESS;
504 /* Some serious issue happen on IPC - recover */
505 shutdown(audio_sk, SHUT_RDWR);
507 return AUDIO_STATUS_FAILED;
510 static int ipc_open_cmd(const struct audio_codec *codec)
512 uint8_t buf[BLUEZ_AUDIO_MTU];
513 struct audio_cmd_open *cmd = (struct audio_cmd_open *) buf;
514 struct audio_rsp_open rsp;
515 size_t cmd_len = sizeof(buf) - sizeof(*cmd);
516 size_t rsp_len = sizeof(rsp);
521 memcpy(cmd->uuid, a2dp_src_uuid, sizeof(a2dp_src_uuid));
523 cmd->codec = codec->type;
524 cmd->presets = codec->get_presets(cmd->preset, &cmd_len);
526 cmd_len += sizeof(*cmd);
528 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_OPEN, cmd_len, cmd,
529 &rsp_len, &rsp, NULL);
531 if (result != AUDIO_STATUS_SUCCESS)
537 static int ipc_close_cmd(uint8_t endpoint_id)
539 struct audio_cmd_close cmd;
544 cmd.id = endpoint_id;
546 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_CLOSE,
547 sizeof(cmd), &cmd, NULL, NULL, NULL);
552 static int ipc_open_stream_cmd(uint8_t endpoint_id, uint16_t *mtu,
553 struct audio_preset **caps)
555 char buf[BLUEZ_AUDIO_MTU];
556 struct audio_cmd_open_stream cmd;
557 struct audio_rsp_open_stream *rsp =
558 (struct audio_rsp_open_stream *) &buf;
559 size_t rsp_len = sizeof(buf);
565 return AUDIO_STATUS_FAILED;
567 cmd.id = endpoint_id;
569 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_OPEN_STREAM,
570 sizeof(cmd), &cmd, &rsp_len, rsp, NULL);
572 if (result == AUDIO_STATUS_SUCCESS) {
573 size_t buf_len = sizeof(struct audio_preset) +
576 *caps = malloc(buf_len);
577 memcpy(*caps, &rsp->preset, buf_len);
585 static int ipc_close_stream_cmd(uint8_t endpoint_id)
587 struct audio_cmd_close_stream cmd;
592 cmd.id = endpoint_id;
594 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_CLOSE_STREAM,
595 sizeof(cmd), &cmd, NULL, NULL, NULL);
600 static int ipc_resume_stream_cmd(uint8_t endpoint_id)
602 struct audio_cmd_resume_stream cmd;
607 cmd.id = endpoint_id;
609 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_RESUME_STREAM,
610 sizeof(cmd), &cmd, NULL, NULL, NULL);
615 static int ipc_suspend_stream_cmd(uint8_t endpoint_id)
617 struct audio_cmd_suspend_stream cmd;
622 cmd.id = endpoint_id;
624 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_SUSPEND_STREAM,
625 sizeof(cmd), &cmd, NULL, NULL, NULL);
630 static int register_endpoints(void)
632 struct audio_endpoint *ep = &audio_endpoints[0];
635 for (i = 0; i < NUM_CODECS; i++, ep++) {
636 const struct audio_codec *codec = &audio_codecs[i];
638 ep->id = ipc_open_cmd(codec);
641 return AUDIO_STATUS_FAILED;
644 ep->codec_data = NULL;
648 return AUDIO_STATUS_SUCCESS;
651 static void unregister_endpoints(void)
655 for (i = 0; i < MAX_AUDIO_ENDPOINTS; i++) {
656 struct audio_endpoint *ep = &audio_endpoints[i];
659 ipc_close_cmd(ep->id);
660 memset(ep, 0, sizeof(*ep));
665 static ssize_t out_write(struct audio_stream_out *stream, const void *buffer,
668 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
670 /* We can auto-start only from standby */
671 if (out->audio_state == AUDIO_A2DP_STATE_STANDBY) {
672 DBG("stream in standby, auto-start");
674 if (ipc_resume_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
677 out->audio_state = AUDIO_A2DP_STATE_STARTED;
680 if (out->audio_state != AUDIO_A2DP_STATE_STARTED) {
681 DBG("stream not started");
685 /* TODO: encode data using codec */
690 static uint32_t out_get_sample_rate(const struct audio_stream *stream)
692 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
696 return out->cfg.rate;
699 static int out_set_sample_rate(struct audio_stream *stream, uint32_t rate)
701 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
705 if (rate != out->cfg.rate) {
706 DBG("cannot set sample rate to %d", rate);
713 static size_t out_get_buffer_size(const struct audio_stream *stream)
719 static uint32_t out_get_channels(const struct audio_stream *stream)
721 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
725 return out->cfg.channels;
728 static audio_format_t out_get_format(const struct audio_stream *stream)
730 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
734 return out->cfg.format;
737 static int out_set_format(struct audio_stream *stream, audio_format_t format)
743 static int out_standby(struct audio_stream *stream)
745 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
749 if (out->audio_state == AUDIO_A2DP_STATE_STARTED) {
750 if (ipc_suspend_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
752 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
758 static int out_dump(const struct audio_stream *stream, int fd)
764 static int out_set_parameters(struct audio_stream *stream, const char *kvpairs)
766 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
770 bool enter_suspend = false;
771 bool exit_suspend = false;
775 str = strdup(kvpairs);
776 kvpair = strtok_r(str, ";", &saveptr);
778 for (; kvpair && *kvpair; kvpair = strtok_r(NULL, ";", &saveptr)) {
781 keyval = strchr(kvpair, '=');
788 if (!strcmp(kvpair, "closing")) {
789 if (!strcmp(keyval, "true"))
790 out->audio_state = AUDIO_A2DP_STATE_NONE;
791 } else if (!strcmp(kvpair, "A2dpSuspended")) {
792 if (!strcmp(keyval, "true"))
793 enter_suspend = true;
801 if (enter_suspend && out->audio_state == AUDIO_A2DP_STATE_STARTED) {
802 if (ipc_suspend_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
804 out->audio_state = AUDIO_A2DP_STATE_SUSPENDED;
807 if (exit_suspend && out->audio_state == AUDIO_A2DP_STATE_SUSPENDED)
808 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
813 static char *out_get_parameters(const struct audio_stream *stream,
820 static uint32_t out_get_latency(const struct audio_stream_out *stream)
826 static int out_set_volume(struct audio_stream_out *stream, float left,
830 /* volume controlled in audioflinger mixer (digital) */
834 static int out_get_render_position(const struct audio_stream_out *stream,
835 uint32_t *dsp_frames)
841 static int out_add_audio_effect(const struct audio_stream *stream,
842 effect_handle_t effect)
848 static int out_remove_audio_effect(const struct audio_stream *stream,
849 effect_handle_t effect)
855 static uint32_t in_get_sample_rate(const struct audio_stream *stream)
861 static int in_set_sample_rate(struct audio_stream *stream, uint32_t rate)
867 static size_t in_get_buffer_size(const struct audio_stream *stream)
873 static uint32_t in_get_channels(const struct audio_stream *stream)
879 static audio_format_t in_get_format(const struct audio_stream *stream)
885 static int in_set_format(struct audio_stream *stream, audio_format_t format)
891 static int in_standby(struct audio_stream *stream)
897 static int in_dump(const struct audio_stream *stream, int fd)
903 static int in_set_parameters(struct audio_stream *stream, const char *kvpairs)
909 static char *in_get_parameters(const struct audio_stream *stream,
916 static int in_set_gain(struct audio_stream_in *stream, float gain)
922 static ssize_t in_read(struct audio_stream_in *stream, void *buffer,
929 static uint32_t in_get_input_frames_lost(struct audio_stream_in *stream)
935 static int in_add_audio_effect(const struct audio_stream *stream,
936 effect_handle_t effect)
942 static int in_remove_audio_effect(const struct audio_stream *stream,
943 effect_handle_t effect)
949 static int audio_open_output_stream(struct audio_hw_device *dev,
950 audio_io_handle_t handle,
951 audio_devices_t devices,
952 audio_output_flags_t flags,
953 struct audio_config *config,
954 struct audio_stream_out **stream_out)
957 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
958 struct a2dp_stream_out *out;
959 struct audio_preset *preset;
960 const struct audio_codec *codec;
963 out = calloc(1, sizeof(struct a2dp_stream_out));
969 out->stream.common.get_sample_rate = out_get_sample_rate;
970 out->stream.common.set_sample_rate = out_set_sample_rate;
971 out->stream.common.get_buffer_size = out_get_buffer_size;
972 out->stream.common.get_channels = out_get_channels;
973 out->stream.common.get_format = out_get_format;
974 out->stream.common.set_format = out_set_format;
975 out->stream.common.standby = out_standby;
976 out->stream.common.dump = out_dump;
977 out->stream.common.set_parameters = out_set_parameters;
978 out->stream.common.get_parameters = out_get_parameters;
979 out->stream.common.add_audio_effect = out_add_audio_effect;
980 out->stream.common.remove_audio_effect = out_remove_audio_effect;
981 out->stream.get_latency = out_get_latency;
982 out->stream.set_volume = out_set_volume;
983 out->stream.write = out_write;
984 out->stream.get_render_position = out_get_render_position;
986 /* TODO: for now we always use endpoint 0 */
987 out->ep = &audio_endpoints[0];
989 if (ipc_open_stream_cmd(out->ep->id, &mtu, &preset) !=
990 AUDIO_STATUS_SUCCESS)
996 codec = out->ep->codec;
998 codec->init(preset, mtu, &out->ep->codec_data);
999 codec->get_config(out->ep->codec_data, &out->cfg);
1001 DBG("rate=%d channels=%d format=%d", out->cfg.rate,
1002 out->cfg.channels, out->cfg.format);
1006 *stream_out = &out->stream;
1007 a2dp_dev->out = out;
1009 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
1019 static void audio_close_output_stream(struct audio_hw_device *dev,
1020 struct audio_stream_out *stream)
1022 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
1023 struct audio_endpoint *ep = a2dp_dev->out->ep;
1027 ipc_close_stream_cmd(ep->id);
1029 ep->codec->cleanup(ep->codec_data);
1030 ep->codec_data = NULL;
1033 a2dp_dev->out = NULL;
1036 static int audio_set_parameters(struct audio_hw_device *dev,
1037 const char *kvpairs)
1039 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
1040 struct a2dp_stream_out *out = a2dp_dev->out;
1047 return out->stream.common.set_parameters((struct audio_stream *) out,
1051 static char *audio_get_parameters(const struct audio_hw_device *dev,
1058 static int audio_init_check(const struct audio_hw_device *dev)
1064 static int audio_set_voice_volume(struct audio_hw_device *dev, float volume)
1070 static int audio_set_master_volume(struct audio_hw_device *dev, float volume)
1076 static int audio_set_mode(struct audio_hw_device *dev, int mode)
1082 static int audio_set_mic_mute(struct audio_hw_device *dev, bool state)
1088 static int audio_get_mic_mute(const struct audio_hw_device *dev, bool *state)
1094 static size_t audio_get_input_buffer_size(const struct audio_hw_device *dev,
1095 const struct audio_config *config)
1101 static int audio_open_input_stream(struct audio_hw_device *dev,
1102 audio_io_handle_t handle,
1103 audio_devices_t devices,
1104 struct audio_config *config,
1105 struct audio_stream_in **stream_in)
1107 struct audio_stream_in *in;
1111 in = calloc(1, sizeof(struct audio_stream_in));
1115 in->common.get_sample_rate = in_get_sample_rate;
1116 in->common.set_sample_rate = in_set_sample_rate;
1117 in->common.get_buffer_size = in_get_buffer_size;
1118 in->common.get_channels = in_get_channels;
1119 in->common.get_format = in_get_format;
1120 in->common.set_format = in_set_format;
1121 in->common.standby = in_standby;
1122 in->common.dump = in_dump;
1123 in->common.set_parameters = in_set_parameters;
1124 in->common.get_parameters = in_get_parameters;
1125 in->common.add_audio_effect = in_add_audio_effect;
1126 in->common.remove_audio_effect = in_remove_audio_effect;
1127 in->set_gain = in_set_gain;
1129 in->get_input_frames_lost = in_get_input_frames_lost;
1136 static void audio_close_input_stream(struct audio_hw_device *dev,
1137 struct audio_stream_in *stream_in)
1143 static int audio_dump(const audio_hw_device_t *device, int fd)
1149 static int audio_close(hw_device_t *device)
1151 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *)device;
1155 pthread_mutex_lock(&close_mutex);
1156 audio_ipc_cleanup();
1157 close_thread = true;
1158 pthread_mutex_unlock(&close_mutex);
1160 pthread_join(ipc_th, NULL);
1169 static void *ipc_handler(void *data)
1177 DBG("Waiting for connection ...");
1178 audio_sk = accept(listen_sk, NULL, NULL);
1181 error("audio: Failed to accept socket: %d (%s)", err,
1186 DBG("Audio IPC: Connected");
1188 if (register_endpoints() != AUDIO_STATUS_SUCCESS) {
1189 error("audio: Failed to register endpoints");
1191 unregister_endpoints();
1193 shutdown(audio_sk, SHUT_RDWR);
1197 memset(&pfd, 0, sizeof(pfd));
1199 pfd.events = POLLHUP | POLLERR | POLLNVAL;
1201 /* Check if socket is still alive. Empty while loop.*/
1202 while (poll(&pfd, 1, -1) < 0 && errno == EINTR);
1204 if (pfd.revents & (POLLHUP | POLLERR | POLLNVAL)) {
1205 info("Audio HAL: Socket closed");
1209 /*Check if audio_dev is closed */
1210 pthread_mutex_lock(&close_mutex);
1211 done = close_thread;
1212 close_thread = false;
1213 pthread_mutex_unlock(&close_mutex);
1216 unregister_endpoints();
1218 info("Closing Audio IPC thread");
1222 static int audio_ipc_init(void)
1224 struct sockaddr_un addr;
1230 sk = socket(PF_LOCAL, SOCK_SEQPACKET, 0);
1233 error("audio: Failed to create socket: %d (%s)", err,
1238 memset(&addr, 0, sizeof(addr));
1239 addr.sun_family = AF_UNIX;
1241 memcpy(addr.sun_path, BLUEZ_AUDIO_SK_PATH,
1242 sizeof(BLUEZ_AUDIO_SK_PATH));
1244 if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1246 error("audio: Failed to bind socket: %d (%s)", err,
1251 if (listen(sk, 1) < 0) {
1253 error("audio: Failed to listen on the socket: %d (%s)", err,
1260 err = pthread_create(&ipc_th, NULL, ipc_handler, NULL);
1264 error("audio: Failed to start Audio IPC thread: %d (%s)",
1265 err, strerror(err));
1276 static int audio_open(const hw_module_t *module, const char *name,
1277 hw_device_t **device)
1279 struct a2dp_audio_dev *a2dp_dev;
1284 if (strcmp(name, AUDIO_HARDWARE_INTERFACE)) {
1285 error("audio: interface %s not matching [%s]", name,
1286 AUDIO_HARDWARE_INTERFACE);
1290 err = audio_ipc_init();
1294 a2dp_dev = calloc(1, sizeof(struct a2dp_audio_dev));
1298 a2dp_dev->dev.common.tag = HARDWARE_DEVICE_TAG;
1299 a2dp_dev->dev.common.version = AUDIO_DEVICE_API_VERSION_CURRENT;
1300 a2dp_dev->dev.common.module = (struct hw_module_t *) module;
1301 a2dp_dev->dev.common.close = audio_close;
1303 a2dp_dev->dev.init_check = audio_init_check;
1304 a2dp_dev->dev.set_voice_volume = audio_set_voice_volume;
1305 a2dp_dev->dev.set_master_volume = audio_set_master_volume;
1306 a2dp_dev->dev.set_mode = audio_set_mode;
1307 a2dp_dev->dev.set_mic_mute = audio_set_mic_mute;
1308 a2dp_dev->dev.get_mic_mute = audio_get_mic_mute;
1309 a2dp_dev->dev.set_parameters = audio_set_parameters;
1310 a2dp_dev->dev.get_parameters = audio_get_parameters;
1311 a2dp_dev->dev.get_input_buffer_size = audio_get_input_buffer_size;
1312 a2dp_dev->dev.open_output_stream = audio_open_output_stream;
1313 a2dp_dev->dev.close_output_stream = audio_close_output_stream;
1314 a2dp_dev->dev.open_input_stream = audio_open_input_stream;
1315 a2dp_dev->dev.close_input_stream = audio_close_input_stream;
1316 a2dp_dev->dev.dump = audio_dump;
1318 /* Note that &a2dp_dev->dev.common is the same pointer as a2dp_dev.
1319 * This results from the structure of following structs:a2dp_audio_dev,
1320 * audio_hw_device. We will rely on this later in the code.*/
1321 *device = &a2dp_dev->dev.common;
1326 static struct hw_module_methods_t hal_module_methods = {
1330 struct audio_module HAL_MODULE_INFO_SYM = {
1332 .tag = HARDWARE_MODULE_TAG,
1335 .id = AUDIO_HARDWARE_MODULE_ID,
1336 .name = "A2DP Bluez HW HAL",
1337 .author = "Intel Corporation",
1338 .methods = &hal_module_methods,