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>
27 #include <arpa/inet.h>
29 #include <hardware/audio.h>
30 #include <hardware/hardware.h>
34 #include "audio-msg.h"
37 #include "../profiles/audio/a2dp-codecs.h"
39 static const uint8_t a2dp_src_uuid[] = {
40 0x00, 0x00, 0x11, 0x0a, 0x00, 0x00, 0x10, 0x00,
41 0x80, 0x00, 0x00, 0x80, 0x5f, 0x9b, 0x34, 0xfb };
43 static int listen_sk = -1;
44 static int audio_sk = -1;
45 static bool close_thread = false;
47 static pthread_t ipc_th = 0;
48 static pthread_mutex_t close_mutex = PTHREAD_MUTEX_INITIALIZER;
49 static pthread_mutex_t sk_mutex = PTHREAD_MUTEX_INITIALIZER;
51 #if __BYTE_ORDER == __LITTLE_ENDIAN
62 uint16_t sequence_number;
66 } __attribute__ ((packed));
69 unsigned frame_count:4;
71 unsigned is_last_fragment:1;
72 unsigned is_first_fragment:1;
73 unsigned is_fragmented:1;
74 } __attribute__ ((packed));
76 #elif __BYTE_ORDER == __BIG_ENDIAN
87 uint16_t sequence_number;
91 } __attribute__ ((packed));
94 unsigned is_fragmented:1;
95 unsigned is_first_fragment:1;
96 unsigned is_last_fragment:1;
98 unsigned frame_count:4;
99 } __attribute__ ((packed));
102 #error "Unknown byte order"
105 struct media_packet {
106 struct rtp_header hdr;
107 struct rtp_payload payload;
111 struct audio_input_config {
114 audio_format_t format;
128 unsigned frame_duration;
130 struct timespec start;
131 unsigned frames_sent;
136 static inline void timespec_diff(struct timespec *a, struct timespec *b,
137 struct timespec *res)
139 res->tv_sec = a->tv_sec - b->tv_sec;
140 res->tv_nsec = a->tv_nsec - b->tv_nsec;
142 if (res->tv_nsec < 0) {
144 res->tv_nsec += 1000000000; /* 1sec */
148 static int sbc_get_presets(struct audio_preset *preset, size_t *len);
149 static int sbc_codec_init(struct audio_preset *preset, uint16_t mtu,
151 static int sbc_cleanup(void *codec_data);
152 static int sbc_get_config(void *codec_data,
153 struct audio_input_config *config);
154 static size_t sbc_get_buffer_size(void *codec_data);
155 static void sbc_resume(void *codec_data);
156 static ssize_t sbc_write_data(void *codec_data, const void *buffer,
157 size_t bytes, int fd);
162 int (*get_presets) (struct audio_preset *preset, size_t *len);
164 int (*init) (struct audio_preset *preset, uint16_t mtu,
166 int (*cleanup) (void *codec_data);
167 int (*get_config) (void *codec_data,
168 struct audio_input_config *config);
169 size_t (*get_buffer_size) (void *codec_data);
170 void (*resume) (void *codec_data);
171 ssize_t (*write_data) (void *codec_data, const void *buffer,
172 size_t bytes, int fd);
175 static const struct audio_codec audio_codecs[] = {
177 .type = A2DP_CODEC_SBC,
179 .get_presets = sbc_get_presets,
181 .init = sbc_codec_init,
182 .cleanup = sbc_cleanup,
183 .get_config = sbc_get_config,
184 .get_buffer_size = sbc_get_buffer_size,
185 .resume = sbc_resume,
186 .write_data = sbc_write_data,
190 #define NUM_CODECS (sizeof(audio_codecs) / sizeof(audio_codecs[0]))
192 #define MAX_AUDIO_ENDPOINTS NUM_CODECS
194 struct audio_endpoint {
196 const struct audio_codec *codec;
201 static struct audio_endpoint audio_endpoints[MAX_AUDIO_ENDPOINTS];
204 AUDIO_A2DP_STATE_NONE,
205 AUDIO_A2DP_STATE_STANDBY,
206 AUDIO_A2DP_STATE_SUSPENDED,
207 AUDIO_A2DP_STATE_STARTED
210 struct a2dp_stream_out {
211 struct audio_stream_out stream;
213 struct audio_endpoint *ep;
214 enum a2dp_state_t audio_state;
215 struct audio_input_config cfg;
218 struct a2dp_audio_dev {
219 struct audio_hw_device dev;
220 struct a2dp_stream_out *out;
223 static const a2dp_sbc_t sbc_presets[] = {
225 .frequency = SBC_SAMPLING_FREQ_44100 | SBC_SAMPLING_FREQ_48000,
226 .channel_mode = SBC_CHANNEL_MODE_MONO |
227 SBC_CHANNEL_MODE_DUAL_CHANNEL |
228 SBC_CHANNEL_MODE_STEREO |
229 SBC_CHANNEL_MODE_JOINT_STEREO,
230 .subbands = SBC_SUBBANDS_4 | SBC_SUBBANDS_8,
231 .allocation_method = SBC_ALLOCATION_SNR |
232 SBC_ALLOCATION_LOUDNESS,
233 .block_length = SBC_BLOCK_LENGTH_4 | SBC_BLOCK_LENGTH_8 |
234 SBC_BLOCK_LENGTH_12 | SBC_BLOCK_LENGTH_16,
235 .min_bitpool = MIN_BITPOOL,
236 .max_bitpool = MAX_BITPOOL
239 .frequency = SBC_SAMPLING_FREQ_44100,
240 .channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO,
241 .subbands = SBC_SUBBANDS_8,
242 .allocation_method = SBC_ALLOCATION_LOUDNESS,
243 .block_length = SBC_BLOCK_LENGTH_16,
244 .min_bitpool = MIN_BITPOOL,
245 .max_bitpool = MAX_BITPOOL
248 .frequency = SBC_SAMPLING_FREQ_48000,
249 .channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO,
250 .subbands = SBC_SUBBANDS_8,
251 .allocation_method = SBC_ALLOCATION_LOUDNESS,
252 .block_length = SBC_BLOCK_LENGTH_16,
253 .min_bitpool = MIN_BITPOOL,
254 .max_bitpool = MAX_BITPOOL
258 static int sbc_get_presets(struct audio_preset *preset, size_t *len)
263 uint8_t *ptr = (uint8_t *) preset;
264 size_t preset_size = sizeof(*preset) + sizeof(a2dp_sbc_t);
268 count = sizeof(sbc_presets) / sizeof(sbc_presets[0]);
270 for (i = 0; i < count; i++) {
271 preset = (struct audio_preset *) ptr;
273 if (new_len + preset_size > *len)
276 preset->len = sizeof(a2dp_sbc_t);
277 memcpy(preset->data, &sbc_presets[i], preset->len);
279 new_len += preset_size;
288 static void sbc_init_encoder(struct sbc_data *sbc_data)
290 a2dp_sbc_t *in = &sbc_data->sbc;
291 sbc_t *out = &sbc_data->enc;
295 sbc_init_a2dp(out, 0L, in, sizeof(*in));
297 out->endian = SBC_LE;
298 out->bitpool = in->max_bitpool;
301 static int sbc_codec_init(struct audio_preset *preset, uint16_t mtu,
304 struct sbc_data *sbc_data;
305 size_t hdr_len = sizeof(struct media_packet);
307 size_t out_frame_len;
312 if (preset->len != sizeof(a2dp_sbc_t)) {
313 DBG("preset size mismatch");
314 return AUDIO_STATUS_FAILED;
317 sbc_data = calloc(sizeof(struct sbc_data), 1);
319 memcpy(&sbc_data->sbc, preset->data, preset->len);
321 sbc_init_encoder(sbc_data);
323 in_frame_len = sbc_get_codesize(&sbc_data->enc);
324 out_frame_len = sbc_get_frame_length(&sbc_data->enc);
325 num_frames = (mtu - hdr_len) / out_frame_len;
327 sbc_data->in_frame_len = in_frame_len;
328 sbc_data->in_buf_size = num_frames * in_frame_len;
330 sbc_data->out_buf_size = hdr_len + num_frames * out_frame_len;
331 sbc_data->out_buf = calloc(1, sbc_data->out_buf_size);
333 sbc_data->frame_duration = sbc_get_frame_duration(&sbc_data->enc);
335 *codec_data = sbc_data;
337 return AUDIO_STATUS_SUCCESS;
340 static int sbc_cleanup(void *codec_data)
342 struct sbc_data *sbc_data = (struct sbc_data *) codec_data;
346 sbc_finish(&sbc_data->enc);
347 free(sbc_data->out_buf);
350 return AUDIO_STATUS_SUCCESS;
353 static int sbc_get_config(void *codec_data,
354 struct audio_input_config *config)
356 struct sbc_data *sbc_data = (struct sbc_data *) codec_data;
358 switch (sbc_data->sbc.frequency) {
359 case SBC_SAMPLING_FREQ_16000:
360 config->rate = 16000;
362 case SBC_SAMPLING_FREQ_32000:
363 config->rate = 32000;
365 case SBC_SAMPLING_FREQ_44100:
366 config->rate = 44100;
368 case SBC_SAMPLING_FREQ_48000:
369 config->rate = 48000;
372 return AUDIO_STATUS_FAILED;
374 config->channels = sbc_data->sbc.channel_mode == SBC_CHANNEL_MODE_MONO ?
375 AUDIO_CHANNEL_OUT_MONO :
376 AUDIO_CHANNEL_OUT_STEREO;
377 config->format = AUDIO_FORMAT_PCM_16_BIT;
379 return AUDIO_STATUS_SUCCESS;
382 static size_t sbc_get_buffer_size(void *codec_data)
384 struct sbc_data *sbc_data = (struct sbc_data *) codec_data;
388 return sbc_data->in_buf_size;
391 static void sbc_resume(void *codec_data)
393 struct sbc_data *sbc_data = (struct sbc_data *) codec_data;
397 clock_gettime(CLOCK_MONOTONIC, &sbc_data->start);
399 sbc_data->frames_sent = 0;
402 static ssize_t sbc_write_data(void *codec_data, const void *buffer,
403 size_t bytes, int fd)
405 struct sbc_data *sbc_data = (struct sbc_data *) codec_data;
408 struct media_packet *mp = (struct media_packet *) sbc_data->out_buf;
409 size_t free_space = sbc_data->out_buf_size - sizeof(*mp);
411 struct timespec diff;
412 unsigned expected_frames;
417 mp->hdr.sequence_number = htons(sbc_data->seq++);
418 mp->hdr.ssrc = htonl(1);
419 mp->payload.frame_count = 0;
421 while (bytes - consumed >= sbc_data->in_frame_len) {
424 ret = sbc_encode(&sbc_data->enc, buffer + consumed,
425 sbc_data->in_frame_len,
426 mp->data + encoded, free_space,
430 DBG("failed to encode block");
434 mp->payload.frame_count++;
438 free_space -= written;
441 ret = write(fd, mp, sizeof(*mp) + encoded);
444 DBG("error writing data: %d (%s)", err, strerror(err));
447 if (consumed != bytes || free_space != 0) {
448 /* we should encode all input data and fill output buffer
449 * if we did not, something went wrong but we can't really
450 * handle this so this is just sanity check
452 DBG("some data were not encoded");
455 sbc_data->frames_sent += mp->payload.frame_count;
457 clock_gettime(CLOCK_MONOTONIC, &cur);
458 timespec_diff(&cur, &sbc_data->start, &diff);
459 expected_frames = (diff.tv_sec * 1000000 + diff.tv_nsec / 1000) /
460 sbc_data->frame_duration;
462 /* AudioFlinger does not seem to provide any *working* API to provide
463 * data in some interval and will just send another buffer as soon as
464 * we process current one. To prevent overflowing L2CAP socket, we need
465 * to introduce some artificial delay here base on how many audio frames
466 * were sent so far, i.e. if we're not lagging behind audio stream, we
467 * can sleep for duration of single media packet.
469 if (sbc_data->frames_sent >= expected_frames)
470 usleep(sbc_data->frame_duration * mp->payload.frame_count);
472 /* we always assume that all data was processed and sent */
476 static void audio_ipc_cleanup(void)
479 shutdown(audio_sk, SHUT_RDWR);
484 static int audio_ipc_cmd(uint8_t service_id, uint8_t opcode, uint16_t len,
485 void *param, size_t *rsp_len, void *rsp, int *fd)
491 char cmsgbuf[CMSG_SPACE(sizeof(int))];
493 size_t s_len = sizeof(s);
496 error("audio: Invalid cmd socket passed to audio_ipc_cmd");
500 if (!rsp || !rsp_len) {
501 memset(&s, 0, s_len);
506 memset(&msg, 0, sizeof(msg));
507 memset(&cmd, 0, sizeof(cmd));
509 cmd.service_id = service_id;
513 iv[0].iov_base = &cmd;
514 iv[0].iov_len = sizeof(cmd);
516 iv[1].iov_base = param;
522 pthread_mutex_lock(&sk_mutex);
524 ret = sendmsg(audio_sk, &msg, 0);
526 error("audio: Sending command failed:%s", strerror(errno));
527 pthread_mutex_unlock(&sk_mutex);
531 /* socket was shutdown */
533 error("audio: Command socket closed");
537 memset(&msg, 0, sizeof(msg));
538 memset(&cmd, 0, sizeof(cmd));
540 iv[0].iov_base = &cmd;
541 iv[0].iov_len = sizeof(cmd);
543 iv[1].iov_base = rsp;
544 iv[1].iov_len = *rsp_len;
550 memset(cmsgbuf, 0, sizeof(cmsgbuf));
551 msg.msg_control = cmsgbuf;
552 msg.msg_controllen = sizeof(cmsgbuf);
555 ret = recvmsg(audio_sk, &msg, 0);
557 error("audio: Receiving command response failed:%s",
559 pthread_mutex_unlock(&sk_mutex);
563 pthread_mutex_unlock(&sk_mutex);
565 if (ret < (ssize_t) sizeof(cmd)) {
566 error("audio: Too small response received(%zd bytes)", ret);
570 if (cmd.service_id != service_id) {
571 error("audio: Invalid service id (%u vs %u)", cmd.service_id,
576 if (ret != (ssize_t) (sizeof(cmd) + cmd.len)) {
577 error("audio: Malformed response received(%zd bytes)", ret);
581 if (cmd.opcode != opcode && cmd.opcode != AUDIO_OP_STATUS) {
582 error("audio: Invalid opcode received (%u vs %u)",
587 if (cmd.opcode == AUDIO_OP_STATUS) {
588 struct hal_status *s = rsp;
590 if (sizeof(*s) != cmd.len) {
591 error("audio: Invalid status length");
595 if (s->code == AUDIO_STATUS_SUCCESS) {
596 error("audio: Invalid success status response");
603 /* Receive auxiliary data in msg */
605 struct cmsghdr *cmsg;
609 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
610 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
611 if (cmsg->cmsg_level == SOL_SOCKET
612 && cmsg->cmsg_type == SCM_RIGHTS) {
613 memcpy(fd, CMSG_DATA(cmsg), sizeof(int));
622 return AUDIO_STATUS_SUCCESS;
625 /* Some serious issue happen on IPC - recover */
626 shutdown(audio_sk, SHUT_RDWR);
628 return AUDIO_STATUS_FAILED;
631 static int ipc_open_cmd(const struct audio_codec *codec)
633 uint8_t buf[BLUEZ_AUDIO_MTU];
634 struct audio_cmd_open *cmd = (struct audio_cmd_open *) buf;
635 struct audio_rsp_open rsp;
636 size_t cmd_len = sizeof(buf) - sizeof(*cmd);
637 size_t rsp_len = sizeof(rsp);
642 memcpy(cmd->uuid, a2dp_src_uuid, sizeof(a2dp_src_uuid));
644 cmd->codec = codec->type;
645 cmd->presets = codec->get_presets(cmd->preset, &cmd_len);
647 cmd_len += sizeof(*cmd);
649 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_OPEN, cmd_len, cmd,
650 &rsp_len, &rsp, NULL);
652 if (result != AUDIO_STATUS_SUCCESS)
658 static int ipc_close_cmd(uint8_t endpoint_id)
660 struct audio_cmd_close cmd;
665 cmd.id = endpoint_id;
667 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_CLOSE,
668 sizeof(cmd), &cmd, NULL, NULL, NULL);
673 static int ipc_open_stream_cmd(uint8_t endpoint_id, uint16_t *mtu, int *fd,
674 struct audio_preset **caps)
676 char buf[BLUEZ_AUDIO_MTU];
677 struct audio_cmd_open_stream cmd;
678 struct audio_rsp_open_stream *rsp =
679 (struct audio_rsp_open_stream *) &buf;
680 size_t rsp_len = sizeof(buf);
686 return AUDIO_STATUS_FAILED;
688 cmd.id = endpoint_id;
690 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_OPEN_STREAM,
691 sizeof(cmd), &cmd, &rsp_len, rsp, fd);
693 if (result == AUDIO_STATUS_SUCCESS) {
694 size_t buf_len = sizeof(struct audio_preset) +
697 *caps = malloc(buf_len);
698 memcpy(*caps, &rsp->preset, buf_len);
706 static int ipc_close_stream_cmd(uint8_t endpoint_id)
708 struct audio_cmd_close_stream cmd;
713 cmd.id = endpoint_id;
715 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_CLOSE_STREAM,
716 sizeof(cmd), &cmd, NULL, NULL, NULL);
721 static int ipc_resume_stream_cmd(uint8_t endpoint_id)
723 struct audio_cmd_resume_stream cmd;
728 cmd.id = endpoint_id;
730 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_RESUME_STREAM,
731 sizeof(cmd), &cmd, NULL, NULL, NULL);
736 static int ipc_suspend_stream_cmd(uint8_t endpoint_id)
738 struct audio_cmd_suspend_stream cmd;
743 cmd.id = endpoint_id;
745 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_SUSPEND_STREAM,
746 sizeof(cmd), &cmd, NULL, NULL, NULL);
751 static int register_endpoints(void)
753 struct audio_endpoint *ep = &audio_endpoints[0];
756 for (i = 0; i < NUM_CODECS; i++, ep++) {
757 const struct audio_codec *codec = &audio_codecs[i];
759 ep->id = ipc_open_cmd(codec);
762 return AUDIO_STATUS_FAILED;
765 ep->codec_data = NULL;
769 return AUDIO_STATUS_SUCCESS;
772 static void unregister_endpoints(void)
776 for (i = 0; i < MAX_AUDIO_ENDPOINTS; i++) {
777 struct audio_endpoint *ep = &audio_endpoints[i];
780 ipc_close_cmd(ep->id);
781 memset(ep, 0, sizeof(*ep));
786 static ssize_t out_write(struct audio_stream_out *stream, const void *buffer,
789 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
791 /* We can auto-start only from standby */
792 if (out->audio_state == AUDIO_A2DP_STATE_STANDBY) {
793 DBG("stream in standby, auto-start");
795 if (ipc_resume_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
798 out->ep->codec->resume(out->ep->codec_data);
800 out->audio_state = AUDIO_A2DP_STATE_STARTED;
803 if (out->audio_state != AUDIO_A2DP_STATE_STARTED) {
804 DBG("stream not started");
808 if (out->ep->fd < 0) {
813 return out->ep->codec->write_data(out->ep->codec_data, buffer,
817 static uint32_t out_get_sample_rate(const struct audio_stream *stream)
819 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
823 return out->cfg.rate;
826 static int out_set_sample_rate(struct audio_stream *stream, uint32_t rate)
828 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
832 if (rate != out->cfg.rate) {
833 DBG("cannot set sample rate to %d", rate);
840 static size_t out_get_buffer_size(const struct audio_stream *stream)
842 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
846 return out->ep->codec->get_buffer_size(out->ep->codec_data);
849 static uint32_t out_get_channels(const struct audio_stream *stream)
851 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
855 return out->cfg.channels;
858 static audio_format_t out_get_format(const struct audio_stream *stream)
860 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
864 return out->cfg.format;
867 static int out_set_format(struct audio_stream *stream, audio_format_t format)
873 static int out_standby(struct audio_stream *stream)
875 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
879 if (out->audio_state == AUDIO_A2DP_STATE_STARTED) {
880 if (ipc_suspend_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
882 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
888 static int out_dump(const struct audio_stream *stream, int fd)
894 static int out_set_parameters(struct audio_stream *stream, const char *kvpairs)
896 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
900 bool enter_suspend = false;
901 bool exit_suspend = false;
905 str = strdup(kvpairs);
906 kvpair = strtok_r(str, ";", &saveptr);
908 for (; kvpair && *kvpair; kvpair = strtok_r(NULL, ";", &saveptr)) {
911 keyval = strchr(kvpair, '=');
918 if (!strcmp(kvpair, "closing")) {
919 if (!strcmp(keyval, "true"))
920 out->audio_state = AUDIO_A2DP_STATE_NONE;
921 } else if (!strcmp(kvpair, "A2dpSuspended")) {
922 if (!strcmp(keyval, "true"))
923 enter_suspend = true;
931 if (enter_suspend && out->audio_state == AUDIO_A2DP_STATE_STARTED) {
932 if (ipc_suspend_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
934 out->audio_state = AUDIO_A2DP_STATE_SUSPENDED;
937 if (exit_suspend && out->audio_state == AUDIO_A2DP_STATE_SUSPENDED)
938 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
943 static char *out_get_parameters(const struct audio_stream *stream,
950 static uint32_t out_get_latency(const struct audio_stream_out *stream)
956 static int out_set_volume(struct audio_stream_out *stream, float left,
960 /* volume controlled in audioflinger mixer (digital) */
964 static int out_get_render_position(const struct audio_stream_out *stream,
965 uint32_t *dsp_frames)
971 static int out_add_audio_effect(const struct audio_stream *stream,
972 effect_handle_t effect)
978 static int out_remove_audio_effect(const struct audio_stream *stream,
979 effect_handle_t effect)
985 static uint32_t in_get_sample_rate(const struct audio_stream *stream)
991 static int in_set_sample_rate(struct audio_stream *stream, uint32_t rate)
997 static size_t in_get_buffer_size(const struct audio_stream *stream)
1003 static uint32_t in_get_channels(const struct audio_stream *stream)
1009 static audio_format_t in_get_format(const struct audio_stream *stream)
1015 static int in_set_format(struct audio_stream *stream, audio_format_t format)
1021 static int in_standby(struct audio_stream *stream)
1027 static int in_dump(const struct audio_stream *stream, int fd)
1033 static int in_set_parameters(struct audio_stream *stream, const char *kvpairs)
1039 static char *in_get_parameters(const struct audio_stream *stream,
1046 static int in_set_gain(struct audio_stream_in *stream, float gain)
1052 static ssize_t in_read(struct audio_stream_in *stream, void *buffer,
1059 static uint32_t in_get_input_frames_lost(struct audio_stream_in *stream)
1065 static int in_add_audio_effect(const struct audio_stream *stream,
1066 effect_handle_t effect)
1072 static int in_remove_audio_effect(const struct audio_stream *stream,
1073 effect_handle_t effect)
1079 static int audio_open_output_stream(struct audio_hw_device *dev,
1080 audio_io_handle_t handle,
1081 audio_devices_t devices,
1082 audio_output_flags_t flags,
1083 struct audio_config *config,
1084 struct audio_stream_out **stream_out)
1087 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
1088 struct a2dp_stream_out *out;
1089 struct audio_preset *preset;
1090 const struct audio_codec *codec;
1094 out = calloc(1, sizeof(struct a2dp_stream_out));
1100 out->stream.common.get_sample_rate = out_get_sample_rate;
1101 out->stream.common.set_sample_rate = out_set_sample_rate;
1102 out->stream.common.get_buffer_size = out_get_buffer_size;
1103 out->stream.common.get_channels = out_get_channels;
1104 out->stream.common.get_format = out_get_format;
1105 out->stream.common.set_format = out_set_format;
1106 out->stream.common.standby = out_standby;
1107 out->stream.common.dump = out_dump;
1108 out->stream.common.set_parameters = out_set_parameters;
1109 out->stream.common.get_parameters = out_get_parameters;
1110 out->stream.common.add_audio_effect = out_add_audio_effect;
1111 out->stream.common.remove_audio_effect = out_remove_audio_effect;
1112 out->stream.get_latency = out_get_latency;
1113 out->stream.set_volume = out_set_volume;
1114 out->stream.write = out_write;
1115 out->stream.get_render_position = out_get_render_position;
1117 /* TODO: for now we always use endpoint 0 */
1118 out->ep = &audio_endpoints[0];
1120 if (ipc_open_stream_cmd(out->ep->id, &mtu, &fd, &preset) !=
1121 AUDIO_STATUS_SUCCESS)
1124 if (!preset || fd < 0)
1129 codec = out->ep->codec;
1131 codec->init(preset, mtu, &out->ep->codec_data);
1132 codec->get_config(out->ep->codec_data, &out->cfg);
1134 DBG("rate=%d channels=%d format=%d", out->cfg.rate,
1135 out->cfg.channels, out->cfg.format);
1139 *stream_out = &out->stream;
1140 a2dp_dev->out = out;
1142 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
1152 static void audio_close_output_stream(struct audio_hw_device *dev,
1153 struct audio_stream_out *stream)
1155 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
1156 struct audio_endpoint *ep = a2dp_dev->out->ep;
1160 ipc_close_stream_cmd(ep->id);
1167 ep->codec->cleanup(ep->codec_data);
1168 ep->codec_data = NULL;
1171 a2dp_dev->out = NULL;
1174 static int audio_set_parameters(struct audio_hw_device *dev,
1175 const char *kvpairs)
1177 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
1178 struct a2dp_stream_out *out = a2dp_dev->out;
1185 return out->stream.common.set_parameters((struct audio_stream *) out,
1189 static char *audio_get_parameters(const struct audio_hw_device *dev,
1196 static int audio_init_check(const struct audio_hw_device *dev)
1202 static int audio_set_voice_volume(struct audio_hw_device *dev, float volume)
1208 static int audio_set_master_volume(struct audio_hw_device *dev, float volume)
1214 static int audio_set_mode(struct audio_hw_device *dev, int mode)
1220 static int audio_set_mic_mute(struct audio_hw_device *dev, bool state)
1226 static int audio_get_mic_mute(const struct audio_hw_device *dev, bool *state)
1232 static size_t audio_get_input_buffer_size(const struct audio_hw_device *dev,
1233 const struct audio_config *config)
1239 static int audio_open_input_stream(struct audio_hw_device *dev,
1240 audio_io_handle_t handle,
1241 audio_devices_t devices,
1242 struct audio_config *config,
1243 struct audio_stream_in **stream_in)
1245 struct audio_stream_in *in;
1249 in = calloc(1, sizeof(struct audio_stream_in));
1253 in->common.get_sample_rate = in_get_sample_rate;
1254 in->common.set_sample_rate = in_set_sample_rate;
1255 in->common.get_buffer_size = in_get_buffer_size;
1256 in->common.get_channels = in_get_channels;
1257 in->common.get_format = in_get_format;
1258 in->common.set_format = in_set_format;
1259 in->common.standby = in_standby;
1260 in->common.dump = in_dump;
1261 in->common.set_parameters = in_set_parameters;
1262 in->common.get_parameters = in_get_parameters;
1263 in->common.add_audio_effect = in_add_audio_effect;
1264 in->common.remove_audio_effect = in_remove_audio_effect;
1265 in->set_gain = in_set_gain;
1267 in->get_input_frames_lost = in_get_input_frames_lost;
1274 static void audio_close_input_stream(struct audio_hw_device *dev,
1275 struct audio_stream_in *stream_in)
1281 static int audio_dump(const audio_hw_device_t *device, int fd)
1287 static int audio_close(hw_device_t *device)
1289 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *)device;
1293 pthread_mutex_lock(&close_mutex);
1294 audio_ipc_cleanup();
1295 close_thread = true;
1296 pthread_mutex_unlock(&close_mutex);
1298 pthread_join(ipc_th, NULL);
1307 static void *ipc_handler(void *data)
1315 DBG("Waiting for connection ...");
1316 audio_sk = accept(listen_sk, NULL, NULL);
1319 error("audio: Failed to accept socket: %d (%s)", err,
1324 DBG("Audio IPC: Connected");
1326 if (register_endpoints() != AUDIO_STATUS_SUCCESS) {
1327 error("audio: Failed to register endpoints");
1329 unregister_endpoints();
1331 shutdown(audio_sk, SHUT_RDWR);
1335 memset(&pfd, 0, sizeof(pfd));
1337 pfd.events = POLLHUP | POLLERR | POLLNVAL;
1339 /* Check if socket is still alive. Empty while loop.*/
1340 while (poll(&pfd, 1, -1) < 0 && errno == EINTR);
1342 if (pfd.revents & (POLLHUP | POLLERR | POLLNVAL)) {
1343 info("Audio HAL: Socket closed");
1347 /*Check if audio_dev is closed */
1348 pthread_mutex_lock(&close_mutex);
1349 done = close_thread;
1350 close_thread = false;
1351 pthread_mutex_unlock(&close_mutex);
1354 unregister_endpoints();
1356 info("Closing Audio IPC thread");
1360 static int audio_ipc_init(void)
1362 struct sockaddr_un addr;
1368 sk = socket(PF_LOCAL, SOCK_SEQPACKET, 0);
1371 error("audio: Failed to create socket: %d (%s)", err,
1376 memset(&addr, 0, sizeof(addr));
1377 addr.sun_family = AF_UNIX;
1379 memcpy(addr.sun_path, BLUEZ_AUDIO_SK_PATH,
1380 sizeof(BLUEZ_AUDIO_SK_PATH));
1382 if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1384 error("audio: Failed to bind socket: %d (%s)", err,
1389 if (listen(sk, 1) < 0) {
1391 error("audio: Failed to listen on the socket: %d (%s)", err,
1398 err = pthread_create(&ipc_th, NULL, ipc_handler, NULL);
1402 error("audio: Failed to start Audio IPC thread: %d (%s)",
1403 err, strerror(err));
1414 static int audio_open(const hw_module_t *module, const char *name,
1415 hw_device_t **device)
1417 struct a2dp_audio_dev *a2dp_dev;
1422 if (strcmp(name, AUDIO_HARDWARE_INTERFACE)) {
1423 error("audio: interface %s not matching [%s]", name,
1424 AUDIO_HARDWARE_INTERFACE);
1428 err = audio_ipc_init();
1432 a2dp_dev = calloc(1, sizeof(struct a2dp_audio_dev));
1436 a2dp_dev->dev.common.tag = HARDWARE_DEVICE_TAG;
1437 a2dp_dev->dev.common.version = AUDIO_DEVICE_API_VERSION_CURRENT;
1438 a2dp_dev->dev.common.module = (struct hw_module_t *) module;
1439 a2dp_dev->dev.common.close = audio_close;
1441 a2dp_dev->dev.init_check = audio_init_check;
1442 a2dp_dev->dev.set_voice_volume = audio_set_voice_volume;
1443 a2dp_dev->dev.set_master_volume = audio_set_master_volume;
1444 a2dp_dev->dev.set_mode = audio_set_mode;
1445 a2dp_dev->dev.set_mic_mute = audio_set_mic_mute;
1446 a2dp_dev->dev.get_mic_mute = audio_get_mic_mute;
1447 a2dp_dev->dev.set_parameters = audio_set_parameters;
1448 a2dp_dev->dev.get_parameters = audio_get_parameters;
1449 a2dp_dev->dev.get_input_buffer_size = audio_get_input_buffer_size;
1450 a2dp_dev->dev.open_output_stream = audio_open_output_stream;
1451 a2dp_dev->dev.close_output_stream = audio_close_output_stream;
1452 a2dp_dev->dev.open_input_stream = audio_open_input_stream;
1453 a2dp_dev->dev.close_input_stream = audio_close_input_stream;
1454 a2dp_dev->dev.dump = audio_dump;
1456 /* Note that &a2dp_dev->dev.common is the same pointer as a2dp_dev.
1457 * This results from the structure of following structs:a2dp_audio_dev,
1458 * audio_hw_device. We will rely on this later in the code.*/
1459 *device = &a2dp_dev->dev.common;
1464 static struct hw_module_methods_t hal_module_methods = {
1468 struct audio_module HAL_MODULE_INFO_SYM = {
1470 .tag = HARDWARE_MODULE_TAG,
1473 .id = AUDIO_HARDWARE_MODULE_ID,
1474 .name = "A2DP Bluez HW HAL",
1475 .author = "Intel Corporation",
1476 .methods = &hal_module_methods,