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 #define FIXED_A2DP_PLAYBACK_LATENCY_MS 25
41 static const uint8_t a2dp_src_uuid[] = {
42 0x00, 0x00, 0x11, 0x0a, 0x00, 0x00, 0x10, 0x00,
43 0x80, 0x00, 0x00, 0x80, 0x5f, 0x9b, 0x34, 0xfb };
45 static int listen_sk = -1;
46 static int audio_sk = -1;
48 static pthread_t ipc_th = 0;
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;
129 unsigned frames_per_packet;
131 struct timespec start;
132 unsigned frames_sent;
137 static inline void timespec_diff(struct timespec *a, struct timespec *b,
138 struct timespec *res)
140 res->tv_sec = a->tv_sec - b->tv_sec;
141 res->tv_nsec = a->tv_nsec - b->tv_nsec;
143 if (res->tv_nsec < 0) {
145 res->tv_nsec += 1000000000; /* 1sec */
149 static int sbc_get_presets(struct audio_preset *preset, size_t *len);
150 static int sbc_codec_init(struct audio_preset *preset, uint16_t mtu,
152 static int sbc_cleanup(void *codec_data);
153 static int sbc_get_config(void *codec_data, struct audio_input_config *config);
154 static size_t sbc_get_buffer_size(void *codec_data);
155 static size_t sbc_get_mediapacket_duration(void *codec_data);
156 static void sbc_resume(void *codec_data);
157 static ssize_t sbc_write_data(void *codec_data, const void *buffer,
158 size_t bytes, int fd);
163 int (*get_presets) (struct audio_preset *preset, size_t *len);
165 int (*init) (struct audio_preset *preset, uint16_t mtu,
167 int (*cleanup) (void *codec_data);
168 int (*get_config) (void *codec_data,
169 struct audio_input_config *config);
170 size_t (*get_buffer_size) (void *codec_data);
171 size_t (*get_mediapacket_duration) (void *codec_data);
172 void (*resume) (void *codec_data);
173 ssize_t (*write_data) (void *codec_data, const void *buffer,
174 size_t bytes, int fd);
177 static const struct audio_codec audio_codecs[] = {
179 .type = A2DP_CODEC_SBC,
181 .get_presets = sbc_get_presets,
183 .init = sbc_codec_init,
184 .cleanup = sbc_cleanup,
185 .get_config = sbc_get_config,
186 .get_buffer_size = sbc_get_buffer_size,
187 .get_mediapacket_duration = sbc_get_mediapacket_duration,
188 .resume = sbc_resume,
189 .write_data = sbc_write_data,
193 #define NUM_CODECS (sizeof(audio_codecs) / sizeof(audio_codecs[0]))
195 #define MAX_AUDIO_ENDPOINTS NUM_CODECS
197 struct audio_endpoint {
199 const struct audio_codec *codec;
204 static struct audio_endpoint audio_endpoints[MAX_AUDIO_ENDPOINTS];
207 AUDIO_A2DP_STATE_NONE,
208 AUDIO_A2DP_STATE_STANDBY,
209 AUDIO_A2DP_STATE_SUSPENDED,
210 AUDIO_A2DP_STATE_STARTED
213 struct a2dp_stream_out {
214 struct audio_stream_out stream;
216 struct audio_endpoint *ep;
217 enum a2dp_state_t audio_state;
218 struct audio_input_config cfg;
221 struct a2dp_audio_dev {
222 struct audio_hw_device dev;
223 struct a2dp_stream_out *out;
226 static const a2dp_sbc_t sbc_presets[] = {
228 .frequency = SBC_SAMPLING_FREQ_44100 | SBC_SAMPLING_FREQ_48000,
229 .channel_mode = SBC_CHANNEL_MODE_MONO |
230 SBC_CHANNEL_MODE_DUAL_CHANNEL |
231 SBC_CHANNEL_MODE_STEREO |
232 SBC_CHANNEL_MODE_JOINT_STEREO,
233 .subbands = SBC_SUBBANDS_4 | SBC_SUBBANDS_8,
234 .allocation_method = SBC_ALLOCATION_SNR |
235 SBC_ALLOCATION_LOUDNESS,
236 .block_length = SBC_BLOCK_LENGTH_4 | SBC_BLOCK_LENGTH_8 |
237 SBC_BLOCK_LENGTH_12 | SBC_BLOCK_LENGTH_16,
238 .min_bitpool = MIN_BITPOOL,
239 .max_bitpool = MAX_BITPOOL
242 .frequency = SBC_SAMPLING_FREQ_44100,
243 .channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO,
244 .subbands = SBC_SUBBANDS_8,
245 .allocation_method = SBC_ALLOCATION_LOUDNESS,
246 .block_length = SBC_BLOCK_LENGTH_16,
247 .min_bitpool = MIN_BITPOOL,
248 .max_bitpool = MAX_BITPOOL
251 .frequency = SBC_SAMPLING_FREQ_48000,
252 .channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO,
253 .subbands = SBC_SUBBANDS_8,
254 .allocation_method = SBC_ALLOCATION_LOUDNESS,
255 .block_length = SBC_BLOCK_LENGTH_16,
256 .min_bitpool = MIN_BITPOOL,
257 .max_bitpool = MAX_BITPOOL
261 static int sbc_get_presets(struct audio_preset *preset, size_t *len)
266 uint8_t *ptr = (uint8_t *) preset;
267 size_t preset_size = sizeof(*preset) + sizeof(a2dp_sbc_t);
271 count = sizeof(sbc_presets) / sizeof(sbc_presets[0]);
273 for (i = 0; i < count; i++) {
274 preset = (struct audio_preset *) ptr;
276 if (new_len + preset_size > *len)
279 preset->len = sizeof(a2dp_sbc_t);
280 memcpy(preset->data, &sbc_presets[i], preset->len);
282 new_len += preset_size;
291 static void sbc_init_encoder(struct sbc_data *sbc_data)
293 a2dp_sbc_t *in = &sbc_data->sbc;
294 sbc_t *out = &sbc_data->enc;
298 sbc_init_a2dp(out, 0L, in, sizeof(*in));
300 out->endian = SBC_LE;
301 out->bitpool = in->max_bitpool;
304 static int sbc_codec_init(struct audio_preset *preset, uint16_t mtu,
307 struct sbc_data *sbc_data;
308 size_t hdr_len = sizeof(struct media_packet);
310 size_t out_frame_len;
315 if (preset->len != sizeof(a2dp_sbc_t)) {
316 DBG("preset size mismatch");
317 return AUDIO_STATUS_FAILED;
320 sbc_data = calloc(sizeof(struct sbc_data), 1);
322 memcpy(&sbc_data->sbc, preset->data, preset->len);
324 sbc_init_encoder(sbc_data);
326 in_frame_len = sbc_get_codesize(&sbc_data->enc);
327 out_frame_len = sbc_get_frame_length(&sbc_data->enc);
328 num_frames = (mtu - hdr_len) / out_frame_len;
330 sbc_data->in_frame_len = in_frame_len;
331 sbc_data->in_buf_size = num_frames * in_frame_len;
333 sbc_data->out_buf_size = hdr_len + num_frames * out_frame_len;
334 sbc_data->out_buf = calloc(1, sbc_data->out_buf_size);
336 sbc_data->frame_duration = sbc_get_frame_duration(&sbc_data->enc);
337 sbc_data->frames_per_packet = num_frames;
339 *codec_data = sbc_data;
341 return AUDIO_STATUS_SUCCESS;
344 static int sbc_cleanup(void *codec_data)
346 struct sbc_data *sbc_data = (struct sbc_data *) codec_data;
350 sbc_finish(&sbc_data->enc);
351 free(sbc_data->out_buf);
354 return AUDIO_STATUS_SUCCESS;
357 static int sbc_get_config(void *codec_data, struct audio_input_config *config)
359 struct sbc_data *sbc_data = (struct sbc_data *) codec_data;
361 switch (sbc_data->sbc.frequency) {
362 case SBC_SAMPLING_FREQ_16000:
363 config->rate = 16000;
365 case SBC_SAMPLING_FREQ_32000:
366 config->rate = 32000;
368 case SBC_SAMPLING_FREQ_44100:
369 config->rate = 44100;
371 case SBC_SAMPLING_FREQ_48000:
372 config->rate = 48000;
375 return AUDIO_STATUS_FAILED;
377 config->channels = sbc_data->sbc.channel_mode == SBC_CHANNEL_MODE_MONO ?
378 AUDIO_CHANNEL_OUT_MONO :
379 AUDIO_CHANNEL_OUT_STEREO;
380 config->format = AUDIO_FORMAT_PCM_16_BIT;
382 return AUDIO_STATUS_SUCCESS;
385 static size_t sbc_get_buffer_size(void *codec_data)
387 struct sbc_data *sbc_data = (struct sbc_data *) codec_data;
391 return sbc_data->in_buf_size;
394 static size_t sbc_get_mediapacket_duration(void *codec_data)
396 struct sbc_data *sbc_data = (struct sbc_data *) codec_data;
400 return sbc_data->frame_duration * sbc_data->frames_per_packet;
403 static void sbc_resume(void *codec_data)
405 struct sbc_data *sbc_data = (struct sbc_data *) codec_data;
409 clock_gettime(CLOCK_MONOTONIC, &sbc_data->start);
411 sbc_data->frames_sent = 0;
414 static ssize_t sbc_write_data(void *codec_data, const void *buffer,
415 size_t bytes, int fd)
417 struct sbc_data *sbc_data = (struct sbc_data *) codec_data;
420 struct media_packet *mp = (struct media_packet *) sbc_data->out_buf;
421 size_t free_space = sbc_data->out_buf_size - sizeof(*mp);
423 struct timespec diff;
424 unsigned expected_frames;
429 mp->hdr.sequence_number = htons(sbc_data->seq++);
430 mp->hdr.ssrc = htonl(1);
431 mp->payload.frame_count = 0;
433 while (bytes - consumed >= sbc_data->in_frame_len) {
436 ret = sbc_encode(&sbc_data->enc, buffer + consumed,
437 sbc_data->in_frame_len,
438 mp->data + encoded, free_space,
442 DBG("failed to encode block");
446 mp->payload.frame_count++;
450 free_space -= written;
453 ret = write(fd, mp, sizeof(*mp) + encoded);
456 DBG("error writing data: %d (%s)", err, strerror(err));
459 if (consumed != bytes || free_space != 0) {
460 /* we should encode all input data and fill output buffer
461 * if we did not, something went wrong but we can't really
462 * handle this so this is just sanity check
464 DBG("some data were not encoded");
467 sbc_data->frames_sent += mp->payload.frame_count;
469 clock_gettime(CLOCK_MONOTONIC, &cur);
470 timespec_diff(&cur, &sbc_data->start, &diff);
471 expected_frames = (diff.tv_sec * 1000000 + diff.tv_nsec / 1000) /
472 sbc_data->frame_duration;
474 /* AudioFlinger does not seem to provide any *working* API to provide
475 * data in some interval and will just send another buffer as soon as
476 * we process current one. To prevent overflowing L2CAP socket, we need
477 * to introduce some artificial delay here base on how many audio frames
478 * were sent so far, i.e. if we're not lagging behind audio stream, we
479 * can sleep for duration of single media packet.
481 if (sbc_data->frames_sent >= expected_frames)
482 usleep(sbc_data->frame_duration * mp->payload.frame_count);
484 /* we always assume that all data was processed and sent */
488 static int audio_ipc_cmd(uint8_t service_id, uint8_t opcode, uint16_t len,
489 void *param, size_t *rsp_len, void *rsp, int *fd)
495 char cmsgbuf[CMSG_SPACE(sizeof(int))];
497 size_t s_len = sizeof(s);
499 pthread_mutex_lock(&sk_mutex);
502 error("audio: Invalid cmd socket passed to audio_ipc_cmd");
506 if (!rsp || !rsp_len) {
507 memset(&s, 0, s_len);
512 memset(&msg, 0, sizeof(msg));
513 memset(&cmd, 0, sizeof(cmd));
515 cmd.service_id = service_id;
519 iv[0].iov_base = &cmd;
520 iv[0].iov_len = sizeof(cmd);
522 iv[1].iov_base = param;
528 ret = sendmsg(audio_sk, &msg, 0);
530 error("audio: Sending command failed:%s", strerror(errno));
534 /* socket was shutdown */
536 error("audio: Command socket closed");
540 memset(&msg, 0, sizeof(msg));
541 memset(&cmd, 0, sizeof(cmd));
543 iv[0].iov_base = &cmd;
544 iv[0].iov_len = sizeof(cmd);
546 iv[1].iov_base = rsp;
547 iv[1].iov_len = *rsp_len;
553 memset(cmsgbuf, 0, sizeof(cmsgbuf));
554 msg.msg_control = cmsgbuf;
555 msg.msg_controllen = sizeof(cmsgbuf);
558 ret = recvmsg(audio_sk, &msg, 0);
560 error("audio: Receiving command response failed:%s",
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");
600 pthread_mutex_unlock(&sk_mutex);
605 pthread_mutex_unlock(&sk_mutex);
607 /* Receive auxiliary data in msg */
609 struct cmsghdr *cmsg;
613 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
614 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
615 if (cmsg->cmsg_level == SOL_SOCKET
616 && cmsg->cmsg_type == SCM_RIGHTS) {
617 memcpy(fd, CMSG_DATA(cmsg), sizeof(int));
626 return AUDIO_STATUS_SUCCESS;
629 /* Some serious issue happen on IPC - recover */
630 shutdown(audio_sk, SHUT_RDWR);
631 pthread_mutex_unlock(&sk_mutex);
633 return AUDIO_STATUS_FAILED;
636 static int ipc_open_cmd(const struct audio_codec *codec)
638 uint8_t buf[BLUEZ_AUDIO_MTU];
639 struct audio_cmd_open *cmd = (struct audio_cmd_open *) buf;
640 struct audio_rsp_open rsp;
641 size_t cmd_len = sizeof(buf) - sizeof(*cmd);
642 size_t rsp_len = sizeof(rsp);
647 memcpy(cmd->uuid, a2dp_src_uuid, sizeof(a2dp_src_uuid));
649 cmd->codec = codec->type;
650 cmd->presets = codec->get_presets(cmd->preset, &cmd_len);
652 cmd_len += sizeof(*cmd);
654 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_OPEN, cmd_len, cmd,
655 &rsp_len, &rsp, NULL);
657 if (result != AUDIO_STATUS_SUCCESS)
663 static int ipc_close_cmd(uint8_t endpoint_id)
665 struct audio_cmd_close cmd;
670 cmd.id = endpoint_id;
672 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_CLOSE,
673 sizeof(cmd), &cmd, NULL, NULL, NULL);
678 static int ipc_open_stream_cmd(uint8_t endpoint_id, uint16_t *mtu, int *fd,
679 struct audio_preset **caps)
681 char buf[BLUEZ_AUDIO_MTU];
682 struct audio_cmd_open_stream cmd;
683 struct audio_rsp_open_stream *rsp =
684 (struct audio_rsp_open_stream *) &buf;
685 size_t rsp_len = sizeof(buf);
691 return AUDIO_STATUS_FAILED;
693 cmd.id = endpoint_id;
695 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_OPEN_STREAM,
696 sizeof(cmd), &cmd, &rsp_len, rsp, fd);
698 if (result == AUDIO_STATUS_SUCCESS) {
699 size_t buf_len = sizeof(struct audio_preset) +
702 *caps = malloc(buf_len);
703 memcpy(*caps, &rsp->preset, buf_len);
711 static int ipc_close_stream_cmd(uint8_t endpoint_id)
713 struct audio_cmd_close_stream cmd;
718 cmd.id = endpoint_id;
720 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_CLOSE_STREAM,
721 sizeof(cmd), &cmd, NULL, NULL, NULL);
726 static int ipc_resume_stream_cmd(uint8_t endpoint_id)
728 struct audio_cmd_resume_stream cmd;
733 cmd.id = endpoint_id;
735 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_RESUME_STREAM,
736 sizeof(cmd), &cmd, NULL, NULL, NULL);
741 static int ipc_suspend_stream_cmd(uint8_t endpoint_id)
743 struct audio_cmd_suspend_stream cmd;
748 cmd.id = endpoint_id;
750 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_SUSPEND_STREAM,
751 sizeof(cmd), &cmd, NULL, NULL, NULL);
756 static int register_endpoints(void)
758 struct audio_endpoint *ep = &audio_endpoints[0];
761 for (i = 0; i < NUM_CODECS; i++, ep++) {
762 const struct audio_codec *codec = &audio_codecs[i];
764 ep->id = ipc_open_cmd(codec);
767 return AUDIO_STATUS_FAILED;
770 ep->codec_data = NULL;
774 return AUDIO_STATUS_SUCCESS;
777 static void unregister_endpoints(void)
781 for (i = 0; i < MAX_AUDIO_ENDPOINTS; i++) {
782 struct audio_endpoint *ep = &audio_endpoints[i];
785 ipc_close_cmd(ep->id);
786 memset(ep, 0, sizeof(*ep));
791 static ssize_t out_write(struct audio_stream_out *stream, const void *buffer,
794 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
796 /* We can auto-start only from standby */
797 if (out->audio_state == AUDIO_A2DP_STATE_STANDBY) {
798 DBG("stream in standby, auto-start");
800 if (ipc_resume_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
803 out->ep->codec->resume(out->ep->codec_data);
805 out->audio_state = AUDIO_A2DP_STATE_STARTED;
808 if (out->audio_state != AUDIO_A2DP_STATE_STARTED) {
809 DBG("stream not started");
813 if (out->ep->fd < 0) {
818 return out->ep->codec->write_data(out->ep->codec_data, buffer,
822 static uint32_t out_get_sample_rate(const struct audio_stream *stream)
824 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
828 return out->cfg.rate;
831 static int out_set_sample_rate(struct audio_stream *stream, uint32_t rate)
833 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
837 if (rate != out->cfg.rate) {
838 DBG("cannot set sample rate to %d", rate);
845 static size_t out_get_buffer_size(const struct audio_stream *stream)
847 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
851 return out->ep->codec->get_buffer_size(out->ep->codec_data);
854 static uint32_t out_get_channels(const struct audio_stream *stream)
856 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
860 return out->cfg.channels;
863 static audio_format_t out_get_format(const struct audio_stream *stream)
865 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
869 return out->cfg.format;
872 static int out_set_format(struct audio_stream *stream, audio_format_t format)
878 static int out_standby(struct audio_stream *stream)
880 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
884 if (out->audio_state == AUDIO_A2DP_STATE_STARTED) {
885 if (ipc_suspend_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
887 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
893 static int out_dump(const struct audio_stream *stream, int fd)
899 static int out_set_parameters(struct audio_stream *stream, const char *kvpairs)
901 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
905 bool enter_suspend = false;
906 bool exit_suspend = false;
910 str = strdup(kvpairs);
911 kvpair = strtok_r(str, ";", &saveptr);
913 for (; kvpair && *kvpair; kvpair = strtok_r(NULL, ";", &saveptr)) {
916 keyval = strchr(kvpair, '=');
923 if (!strcmp(kvpair, "closing")) {
924 if (!strcmp(keyval, "true"))
925 out->audio_state = AUDIO_A2DP_STATE_NONE;
926 } else if (!strcmp(kvpair, "A2dpSuspended")) {
927 if (!strcmp(keyval, "true"))
928 enter_suspend = true;
936 if (enter_suspend && out->audio_state == AUDIO_A2DP_STATE_STARTED) {
937 if (ipc_suspend_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
939 out->audio_state = AUDIO_A2DP_STATE_SUSPENDED;
942 if (exit_suspend && out->audio_state == AUDIO_A2DP_STATE_SUSPENDED)
943 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
948 static char *out_get_parameters(const struct audio_stream *stream,
955 static uint32_t out_get_latency(const struct audio_stream_out *stream)
957 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
958 struct audio_endpoint *ep = out->ep;
963 pkt_duration = ep->codec->get_mediapacket_duration(ep->codec_data);
965 return FIXED_A2DP_PLAYBACK_LATENCY_MS + pkt_duration / 1000;
968 static int out_set_volume(struct audio_stream_out *stream, float left,
972 /* volume controlled in audioflinger mixer (digital) */
976 static int out_get_render_position(const struct audio_stream_out *stream,
977 uint32_t *dsp_frames)
983 static int out_add_audio_effect(const struct audio_stream *stream,
984 effect_handle_t effect)
990 static int out_remove_audio_effect(const struct audio_stream *stream,
991 effect_handle_t effect)
997 static uint32_t in_get_sample_rate(const struct audio_stream *stream)
1003 static int in_set_sample_rate(struct audio_stream *stream, uint32_t rate)
1009 static size_t in_get_buffer_size(const struct audio_stream *stream)
1015 static uint32_t in_get_channels(const struct audio_stream *stream)
1021 static audio_format_t in_get_format(const struct audio_stream *stream)
1027 static int in_set_format(struct audio_stream *stream, audio_format_t format)
1033 static int in_standby(struct audio_stream *stream)
1039 static int in_dump(const struct audio_stream *stream, int fd)
1045 static int in_set_parameters(struct audio_stream *stream, const char *kvpairs)
1051 static char *in_get_parameters(const struct audio_stream *stream,
1058 static int in_set_gain(struct audio_stream_in *stream, float gain)
1064 static ssize_t in_read(struct audio_stream_in *stream, void *buffer,
1071 static uint32_t in_get_input_frames_lost(struct audio_stream_in *stream)
1077 static int in_add_audio_effect(const struct audio_stream *stream,
1078 effect_handle_t effect)
1084 static int in_remove_audio_effect(const struct audio_stream *stream,
1085 effect_handle_t effect)
1091 static int audio_open_output_stream(struct audio_hw_device *dev,
1092 audio_io_handle_t handle,
1093 audio_devices_t devices,
1094 audio_output_flags_t flags,
1095 struct audio_config *config,
1096 struct audio_stream_out **stream_out)
1099 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
1100 struct a2dp_stream_out *out;
1101 struct audio_preset *preset;
1102 const struct audio_codec *codec;
1106 out = calloc(1, sizeof(struct a2dp_stream_out));
1112 out->stream.common.get_sample_rate = out_get_sample_rate;
1113 out->stream.common.set_sample_rate = out_set_sample_rate;
1114 out->stream.common.get_buffer_size = out_get_buffer_size;
1115 out->stream.common.get_channels = out_get_channels;
1116 out->stream.common.get_format = out_get_format;
1117 out->stream.common.set_format = out_set_format;
1118 out->stream.common.standby = out_standby;
1119 out->stream.common.dump = out_dump;
1120 out->stream.common.set_parameters = out_set_parameters;
1121 out->stream.common.get_parameters = out_get_parameters;
1122 out->stream.common.add_audio_effect = out_add_audio_effect;
1123 out->stream.common.remove_audio_effect = out_remove_audio_effect;
1124 out->stream.get_latency = out_get_latency;
1125 out->stream.set_volume = out_set_volume;
1126 out->stream.write = out_write;
1127 out->stream.get_render_position = out_get_render_position;
1129 /* TODO: for now we always use endpoint 0 */
1130 out->ep = &audio_endpoints[0];
1132 if (ipc_open_stream_cmd(out->ep->id, &mtu, &fd, &preset) !=
1133 AUDIO_STATUS_SUCCESS)
1136 if (!preset || fd < 0)
1141 codec = out->ep->codec;
1143 codec->init(preset, mtu, &out->ep->codec_data);
1144 codec->get_config(out->ep->codec_data, &out->cfg);
1146 DBG("rate=%d channels=%d format=%d", out->cfg.rate,
1147 out->cfg.channels, out->cfg.format);
1151 *stream_out = &out->stream;
1152 a2dp_dev->out = out;
1154 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
1164 static void audio_close_output_stream(struct audio_hw_device *dev,
1165 struct audio_stream_out *stream)
1167 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
1168 struct audio_endpoint *ep = a2dp_dev->out->ep;
1172 ipc_close_stream_cmd(ep->id);
1179 ep->codec->cleanup(ep->codec_data);
1180 ep->codec_data = NULL;
1183 a2dp_dev->out = NULL;
1186 static int audio_set_parameters(struct audio_hw_device *dev,
1187 const char *kvpairs)
1189 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
1190 struct a2dp_stream_out *out = a2dp_dev->out;
1197 return out->stream.common.set_parameters((struct audio_stream *) out,
1201 static char *audio_get_parameters(const struct audio_hw_device *dev,
1208 static int audio_init_check(const struct audio_hw_device *dev)
1214 static int audio_set_voice_volume(struct audio_hw_device *dev, float volume)
1220 static int audio_set_master_volume(struct audio_hw_device *dev, float volume)
1226 static int audio_set_mode(struct audio_hw_device *dev, int mode)
1232 static int audio_set_mic_mute(struct audio_hw_device *dev, bool state)
1238 static int audio_get_mic_mute(const struct audio_hw_device *dev, bool *state)
1244 static size_t audio_get_input_buffer_size(const struct audio_hw_device *dev,
1245 const struct audio_config *config)
1251 static int audio_open_input_stream(struct audio_hw_device *dev,
1252 audio_io_handle_t handle,
1253 audio_devices_t devices,
1254 struct audio_config *config,
1255 struct audio_stream_in **stream_in)
1257 struct audio_stream_in *in;
1261 in = calloc(1, sizeof(struct audio_stream_in));
1265 in->common.get_sample_rate = in_get_sample_rate;
1266 in->common.set_sample_rate = in_set_sample_rate;
1267 in->common.get_buffer_size = in_get_buffer_size;
1268 in->common.get_channels = in_get_channels;
1269 in->common.get_format = in_get_format;
1270 in->common.set_format = in_set_format;
1271 in->common.standby = in_standby;
1272 in->common.dump = in_dump;
1273 in->common.set_parameters = in_set_parameters;
1274 in->common.get_parameters = in_get_parameters;
1275 in->common.add_audio_effect = in_add_audio_effect;
1276 in->common.remove_audio_effect = in_remove_audio_effect;
1277 in->set_gain = in_set_gain;
1279 in->get_input_frames_lost = in_get_input_frames_lost;
1286 static void audio_close_input_stream(struct audio_hw_device *dev,
1287 struct audio_stream_in *stream_in)
1293 static int audio_dump(const audio_hw_device_t *device, int fd)
1299 static int audio_close(hw_device_t *device)
1301 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *)device;
1305 unregister_endpoints();
1307 shutdown(listen_sk, SHUT_RDWR);
1308 shutdown(audio_sk, SHUT_RDWR);
1310 pthread_join(ipc_th, NULL);
1319 static void *ipc_handler(void *data)
1328 DBG("Waiting for connection ...");
1330 sk = accept(listen_sk, NULL, NULL);
1337 if (err != ECONNABORTED && err != EINVAL)
1338 error("audio: Failed to accept socket: %d (%s)",
1339 err, strerror(err));
1344 pthread_mutex_lock(&sk_mutex);
1346 pthread_mutex_unlock(&sk_mutex);
1348 DBG("Audio IPC: Connected");
1350 if (register_endpoints() != AUDIO_STATUS_SUCCESS) {
1351 error("audio: Failed to register endpoints");
1353 unregister_endpoints();
1355 pthread_mutex_lock(&sk_mutex);
1356 shutdown(audio_sk, SHUT_RDWR);
1359 pthread_mutex_unlock(&sk_mutex);
1364 memset(&pfd, 0, sizeof(pfd));
1366 pfd.events = POLLHUP | POLLERR | POLLNVAL;
1368 /* Check if socket is still alive. Empty while loop.*/
1369 while (poll(&pfd, 1, -1) < 0 && errno == EINTR);
1371 if (pfd.revents & (POLLHUP | POLLERR | POLLNVAL)) {
1372 info("Audio HAL: Socket closed");
1374 pthread_mutex_lock(&sk_mutex);
1377 pthread_mutex_unlock(&sk_mutex);
1381 unregister_endpoints();
1383 info("Closing Audio IPC thread");
1387 static int audio_ipc_init(void)
1389 struct sockaddr_un addr;
1395 sk = socket(PF_LOCAL, SOCK_SEQPACKET, 0);
1398 error("audio: Failed to create socket: %d (%s)", err,
1403 memset(&addr, 0, sizeof(addr));
1404 addr.sun_family = AF_UNIX;
1406 memcpy(addr.sun_path, BLUEZ_AUDIO_SK_PATH,
1407 sizeof(BLUEZ_AUDIO_SK_PATH));
1409 if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1411 error("audio: Failed to bind socket: %d (%s)", err,
1416 if (listen(sk, 1) < 0) {
1418 error("audio: Failed to listen on the socket: %d (%s)", err,
1425 err = pthread_create(&ipc_th, NULL, ipc_handler, NULL);
1429 error("audio: Failed to start Audio IPC thread: %d (%s)",
1430 err, strerror(err));
1441 static int audio_open(const hw_module_t *module, const char *name,
1442 hw_device_t **device)
1444 struct a2dp_audio_dev *a2dp_dev;
1449 if (strcmp(name, AUDIO_HARDWARE_INTERFACE)) {
1450 error("audio: interface %s not matching [%s]", name,
1451 AUDIO_HARDWARE_INTERFACE);
1455 err = audio_ipc_init();
1459 a2dp_dev = calloc(1, sizeof(struct a2dp_audio_dev));
1463 a2dp_dev->dev.common.tag = HARDWARE_DEVICE_TAG;
1464 a2dp_dev->dev.common.version = AUDIO_DEVICE_API_VERSION_CURRENT;
1465 a2dp_dev->dev.common.module = (struct hw_module_t *) module;
1466 a2dp_dev->dev.common.close = audio_close;
1468 a2dp_dev->dev.init_check = audio_init_check;
1469 a2dp_dev->dev.set_voice_volume = audio_set_voice_volume;
1470 a2dp_dev->dev.set_master_volume = audio_set_master_volume;
1471 a2dp_dev->dev.set_mode = audio_set_mode;
1472 a2dp_dev->dev.set_mic_mute = audio_set_mic_mute;
1473 a2dp_dev->dev.get_mic_mute = audio_get_mic_mute;
1474 a2dp_dev->dev.set_parameters = audio_set_parameters;
1475 a2dp_dev->dev.get_parameters = audio_get_parameters;
1476 a2dp_dev->dev.get_input_buffer_size = audio_get_input_buffer_size;
1477 a2dp_dev->dev.open_output_stream = audio_open_output_stream;
1478 a2dp_dev->dev.close_output_stream = audio_close_output_stream;
1479 a2dp_dev->dev.open_input_stream = audio_open_input_stream;
1480 a2dp_dev->dev.close_input_stream = audio_close_input_stream;
1481 a2dp_dev->dev.dump = audio_dump;
1483 /* Note that &a2dp_dev->dev.common is the same pointer as a2dp_dev.
1484 * This results from the structure of following structs:a2dp_audio_dev,
1485 * audio_hw_device. We will rely on this later in the code.*/
1486 *device = &a2dp_dev->dev.common;
1491 static struct hw_module_methods_t hal_module_methods = {
1495 struct audio_module HAL_MODULE_INFO_SYM = {
1497 .tag = HARDWARE_MODULE_TAG,
1500 .id = AUDIO_HARDWARE_MODULE_ID,
1501 .name = "A2DP Bluez HW HAL",
1502 .author = "Intel Corporation",
1503 .methods = &hal_module_methods,