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>
30 #include <hardware/audio.h>
31 #include <hardware/hardware.h>
33 #include "audio-msg.h"
34 #include "ipc-common.h"
37 #include "hal-audio.h"
38 #include "src/shared/util.h"
39 #include "src/shared/queue.h"
41 #define FIXED_A2DP_PLAYBACK_LATENCY_MS 25
43 #define FIXED_BUFFER_SIZE (20 * 512)
45 #define MAX_DELAY 100000 /* 100ms */
47 static const uint8_t a2dp_src_uuid[] = {
48 0x00, 0x00, 0x11, 0x0a, 0x00, 0x00, 0x10, 0x00,
49 0x80, 0x00, 0x00, 0x80, 0x5f, 0x9b, 0x34, 0xfb };
51 static int listen_sk = -1;
52 static int audio_sk = -1;
54 static pthread_t ipc_th = 0;
55 static pthread_mutex_t sk_mutex = PTHREAD_MUTEX_INITIALIZER;
57 static void timespec_add(struct timespec *base, uint64_t time_us,
60 res->tv_sec = base->tv_sec + time_us / 1000000;
61 res->tv_nsec = base->tv_nsec + (time_us % 1000000) * 1000;
63 if (res->tv_nsec >= 1000000000) {
65 res->tv_nsec -= 1000000000;
69 static void timespec_diff(struct timespec *a, struct timespec *b,
72 res->tv_sec = a->tv_sec - b->tv_sec;
73 res->tv_nsec = a->tv_nsec - b->tv_nsec;
75 if (res->tv_nsec < 0) {
77 res->tv_nsec += 1000000000; /* 1sec */
81 static uint64_t timespec_diff_us(struct timespec *a, struct timespec *b)
85 timespec_diff(a, b, &res);
87 return res.tv_sec * 1000000ll + res.tv_nsec / 1000ll;
92 * Bionic does not have clock_nanosleep() prototype in time.h even though
93 * it provides its implementation.
95 extern int clock_nanosleep(clockid_t clock_id, int flags,
96 const struct timespec *request,
97 struct timespec *remain);
100 static const audio_codec_get_t audio_codecs[] = {
105 #define NUM_CODECS (sizeof(audio_codecs) / sizeof(audio_codecs[0]))
107 #define MAX_AUDIO_ENDPOINTS NUM_CODECS
109 static struct queue *loaded_codecs;
111 struct audio_endpoint {
113 const struct audio_codec *codec;
117 struct media_packet *mp;
122 struct timespec start;
127 static struct audio_endpoint audio_endpoints[MAX_AUDIO_ENDPOINTS];
130 AUDIO_A2DP_STATE_NONE,
131 AUDIO_A2DP_STATE_STANDBY,
132 AUDIO_A2DP_STATE_SUSPENDED,
133 AUDIO_A2DP_STATE_STARTED
136 struct a2dp_stream_out {
137 struct audio_stream_out stream;
139 struct audio_endpoint *ep;
140 enum a2dp_state_t audio_state;
141 struct audio_input_config cfg;
143 uint8_t *downmix_buf;
146 struct a2dp_audio_dev {
147 struct audio_hw_device dev;
148 struct a2dp_stream_out *out;
151 static int audio_ipc_cmd(uint8_t service_id, uint8_t opcode, uint16_t len,
152 void *param, size_t *rsp_len, void *rsp, int *fd)
158 char cmsgbuf[CMSG_SPACE(sizeof(int))];
160 size_t s_len = sizeof(s);
162 pthread_mutex_lock(&sk_mutex);
165 error("audio: Invalid cmd socket passed to audio_ipc_cmd");
169 if (!rsp || !rsp_len) {
170 memset(&s, 0, s_len);
175 memset(&msg, 0, sizeof(msg));
176 memset(&cmd, 0, sizeof(cmd));
178 cmd.service_id = service_id;
182 iv[0].iov_base = &cmd;
183 iv[0].iov_len = sizeof(cmd);
185 iv[1].iov_base = param;
191 ret = sendmsg(audio_sk, &msg, 0);
193 error("audio: Sending command failed:%s", strerror(errno));
197 /* socket was shutdown */
199 error("audio: Command socket closed");
203 memset(&msg, 0, sizeof(msg));
204 memset(&cmd, 0, sizeof(cmd));
206 iv[0].iov_base = &cmd;
207 iv[0].iov_len = sizeof(cmd);
209 iv[1].iov_base = rsp;
210 iv[1].iov_len = *rsp_len;
216 memset(cmsgbuf, 0, sizeof(cmsgbuf));
217 msg.msg_control = cmsgbuf;
218 msg.msg_controllen = sizeof(cmsgbuf);
221 ret = recvmsg(audio_sk, &msg, 0);
223 error("audio: Receiving command response failed:%s",
228 if (ret < (ssize_t) sizeof(cmd)) {
229 error("audio: Too small response received(%zd bytes)", ret);
233 if (cmd.service_id != service_id) {
234 error("audio: Invalid service id (%u vs %u)", cmd.service_id,
239 if (ret != (ssize_t) (sizeof(cmd) + cmd.len)) {
240 error("audio: Malformed response received(%zd bytes)", ret);
244 if (cmd.opcode != opcode && cmd.opcode != AUDIO_OP_STATUS) {
245 error("audio: Invalid opcode received (%u vs %u)",
250 if (cmd.opcode == AUDIO_OP_STATUS) {
251 struct ipc_status *s = rsp;
253 if (sizeof(*s) != cmd.len) {
254 error("audio: Invalid status length");
258 if (s->code == AUDIO_STATUS_SUCCESS) {
259 error("audio: Invalid success status response");
263 pthread_mutex_unlock(&sk_mutex);
268 pthread_mutex_unlock(&sk_mutex);
270 /* Receive auxiliary data in msg */
272 struct cmsghdr *cmsg;
276 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
277 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
278 if (cmsg->cmsg_level == SOL_SOCKET
279 && cmsg->cmsg_type == SCM_RIGHTS) {
280 memcpy(fd, CMSG_DATA(cmsg), sizeof(int));
291 return AUDIO_STATUS_SUCCESS;
294 /* Some serious issue happen on IPC - recover */
295 shutdown(audio_sk, SHUT_RDWR);
296 pthread_mutex_unlock(&sk_mutex);
298 return AUDIO_STATUS_FAILED;
301 static int ipc_open_cmd(const struct audio_codec *codec)
303 uint8_t buf[BLUEZ_AUDIO_MTU];
304 struct audio_cmd_open *cmd = (struct audio_cmd_open *) buf;
305 struct audio_rsp_open rsp;
306 size_t cmd_len = sizeof(buf) - sizeof(*cmd);
307 size_t rsp_len = sizeof(rsp);
312 memcpy(cmd->uuid, a2dp_src_uuid, sizeof(a2dp_src_uuid));
314 cmd->codec = codec->type;
315 cmd->presets = codec->get_presets(cmd->preset, &cmd_len);
317 cmd_len += sizeof(*cmd);
319 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_OPEN, cmd_len, cmd,
320 &rsp_len, &rsp, NULL);
322 if (result != AUDIO_STATUS_SUCCESS)
328 static int ipc_close_cmd(uint8_t endpoint_id)
330 struct audio_cmd_close cmd;
335 cmd.id = endpoint_id;
337 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_CLOSE,
338 sizeof(cmd), &cmd, NULL, NULL, NULL);
343 static int ipc_open_stream_cmd(uint8_t *endpoint_id, uint16_t *mtu, int *fd,
344 struct audio_preset **caps)
346 char buf[BLUEZ_AUDIO_MTU];
347 struct audio_cmd_open_stream cmd;
348 struct audio_rsp_open_stream *rsp =
349 (struct audio_rsp_open_stream *) &buf;
350 size_t rsp_len = sizeof(buf);
356 return AUDIO_STATUS_FAILED;
358 cmd.id = *endpoint_id;
360 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_OPEN_STREAM,
361 sizeof(cmd), &cmd, &rsp_len, rsp, fd);
362 if (result == AUDIO_STATUS_SUCCESS) {
363 size_t buf_len = sizeof(struct audio_preset) +
365 *endpoint_id = rsp->id;
367 *caps = malloc(buf_len);
368 memcpy(*caps, &rsp->preset, buf_len);
376 static int ipc_close_stream_cmd(uint8_t endpoint_id)
378 struct audio_cmd_close_stream cmd;
383 cmd.id = endpoint_id;
385 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_CLOSE_STREAM,
386 sizeof(cmd), &cmd, NULL, NULL, NULL);
391 static int ipc_resume_stream_cmd(uint8_t endpoint_id)
393 struct audio_cmd_resume_stream cmd;
398 cmd.id = endpoint_id;
400 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_RESUME_STREAM,
401 sizeof(cmd), &cmd, NULL, NULL, NULL);
406 static int ipc_suspend_stream_cmd(uint8_t endpoint_id)
408 struct audio_cmd_suspend_stream cmd;
413 cmd.id = endpoint_id;
415 result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_SUSPEND_STREAM,
416 sizeof(cmd), &cmd, NULL, NULL, NULL);
421 struct register_state {
422 struct audio_endpoint *ep;
426 static void register_endpoint(void *data, void *user_data)
428 struct audio_codec *codec = data;
429 struct register_state *state = user_data;
430 struct audio_endpoint *ep = state->ep;
432 /* don't even try to register more endpoints if one failed */
436 ep->id = ipc_open_cmd(codec);
440 error("Failed to register endpoint");
445 ep->codec_data = NULL;
451 static int register_endpoints(void)
453 struct register_state state;
455 state.ep = &audio_endpoints[0];
458 queue_foreach(loaded_codecs, register_endpoint, &state);
460 return state.error ? AUDIO_STATUS_FAILED : AUDIO_STATUS_SUCCESS;
463 static void unregister_endpoints(void)
467 for (i = 0; i < MAX_AUDIO_ENDPOINTS; i++) {
468 struct audio_endpoint *ep = &audio_endpoints[i];
471 ipc_close_cmd(ep->id);
472 memset(ep, 0, sizeof(*ep));
477 static bool open_endpoint(struct audio_endpoint **epp,
478 struct audio_input_config *cfg)
480 struct audio_preset *preset;
481 struct audio_endpoint *ep = *epp;
482 const struct audio_codec *codec;
484 uint16_t payload_len;
492 if (ipc_open_stream_cmd(&ep_id, &mtu, &fd, &preset) !=
493 AUDIO_STATUS_SUCCESS)
496 DBG("ep_id=%d mtu=%u", ep_id, mtu);
498 for (i = 0; i < MAX_AUDIO_ENDPOINTS; i++)
499 if (audio_endpoints[i].id == ep_id) {
500 ep = &audio_endpoints[i];
505 error("Cound not find opened endpoint");
512 if (ep->codec->use_rtp)
513 payload_len -= sizeof(struct rtp_header);
518 codec->init(preset, payload_len, &ep->codec_data);
519 codec->get_config(ep->codec_data, cfg);
521 ep->mp = calloc(mtu, 1);
525 if (ep->codec->use_rtp) {
526 struct media_packet_rtp *mp_rtp =
527 (struct media_packet_rtp *) ep->mp;
529 mp_rtp->hdr.pt = 0x60;
530 mp_rtp->hdr.ssrc = htonl(1);
533 ep->mp_data_len = payload_len;
546 static void close_endpoint(struct audio_endpoint *ep)
548 ipc_close_stream_cmd(ep->id);
556 ep->codec->cleanup(ep->codec_data);
557 ep->codec_data = NULL;
560 static bool resume_endpoint(struct audio_endpoint *ep)
562 if (ipc_resume_stream_cmd(ep->id) != AUDIO_STATUS_SUCCESS)
568 ep->codec->update_qos(ep->codec_data, QOS_POLICY_DEFAULT);
573 static void downmix_to_mono(struct a2dp_stream_out *out, const uint8_t *buffer,
576 const int16_t *input = (const void *) buffer;
577 int16_t *output = (void *) out->downmix_buf;
580 /* PCM 16bit stereo */
581 frames = bytes / (2 * sizeof(int16_t));
583 for (i = 0; i < frames; i++) {
584 int16_t l = le16_to_cpu(get_unaligned(&input[i * 2]));
585 int16_t r = le16_to_cpu(get_unaligned(&input[i * 2 + 1]));
587 put_unaligned(cpu_to_le16((l + r) / 2), &output[i]);
591 static bool wait_for_endpoint(struct audio_endpoint *ep, bool *writable)
596 struct pollfd pollfd;
599 pollfd.events = POLLOUT;
602 ret = poll(&pollfd, 1, 500);
605 *writable = !!(pollfd.revents & POLLOUT);
609 if (errno != EINTR) {
611 error("poll failed (%d)", ret);
619 static bool write_to_endpoint(struct audio_endpoint *ep, size_t bytes)
621 struct media_packet *mp = (struct media_packet *) ep->mp;
625 ret = write(ep->fd, mp, bytes);
631 * this should not happen so let's issue warning, but do not
632 * fail, we can try to write next packet
634 if (errno == EAGAIN) {
636 warn("write failed (%d)", ret);
640 if (errno != EINTR) {
642 error("write failed (%d)", ret);
650 static bool write_data(struct a2dp_stream_out *out, const void *buffer,
653 struct audio_endpoint *ep = out->ep;
654 struct media_packet *mp = (struct media_packet *) ep->mp;
655 struct media_packet_rtp *mp_rtp = (struct media_packet_rtp *) ep->mp;
656 size_t free_space = ep->mp_data_len;
659 while (consumed < bytes) {
664 struct timespec current;
665 uint64_t audio_sent, audio_passed;
666 bool do_write = false;
669 * prepare media packet in advance so we don't waste time after
672 if (ep->codec->use_rtp) {
673 mp_rtp->hdr.sequence_number = htons(ep->seq++);
674 mp_rtp->hdr.timestamp = htonl(ep->samples);
676 read = ep->codec->encode_mediapacket(ep->codec_data,
678 bytes - consumed, mp,
679 free_space, &written);
682 * not much we can do here, let's just ignore remaining
688 /* calculate where are we and where we should be */
689 clock_gettime(CLOCK_MONOTONIC, ¤t);
691 memcpy(&ep->start, ¤t, sizeof(ep->start));
692 audio_sent = ep->samples * 1000000ll / out->cfg.rate;
693 audio_passed = timespec_diff_us(¤t, &ep->start);
696 * if we're ahead of stream then wait for next write point,
697 * if we're lagging more than 100ms then stop writing and just
698 * skip data until we're back in sync
700 if (audio_sent > audio_passed) {
701 struct timespec anchor;
705 timespec_add(&ep->start, audio_sent, &anchor);
708 ret = clock_nanosleep(CLOCK_MONOTONIC,
709 TIMER_ABSTIME, &anchor,
716 error("clock_nanosleep failed (%d)",
721 } else if (!ep->resync) {
722 uint64_t diff = audio_passed - audio_sent;
724 if (diff > MAX_DELAY) {
725 warn("lag is %jums, resyncing", diff / 1000);
727 ep->codec->update_qos(ep->codec_data,
728 QOS_POLICY_DECREASE);
733 /* we send data only in case codec encoded some data, i.e. some
734 * codecs do internal buffering and output data only if full
735 * frame can be encoded
736 * in resync mode we'll just drop mediapackets
738 if (written > 0 && !ep->resync) {
739 /* wait some time for socket to be ready for write,
740 * but we'll just skip writing data if timeout occurs
742 if (!wait_for_endpoint(ep, &do_write))
746 if (ep->codec->use_rtp)
747 written += sizeof(struct rtp_header);
749 if (!write_to_endpoint(ep, written))
755 * AudioFlinger provides 16bit PCM, so sample size is 2 bytes
756 * multiplied by number of channels. Number of channels is
757 * simply number of bits set in channels mask.
759 samples = read / (2 * popcount(out->cfg.channels));
760 ep->samples += samples;
767 static ssize_t out_write(struct audio_stream_out *stream, const void *buffer,
770 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
771 const void *in_buf = buffer;
772 size_t in_len = bytes;
774 /* just return in case we're closing */
775 if (out->audio_state == AUDIO_A2DP_STATE_NONE)
778 /* We can auto-start only from standby */
779 if (out->audio_state == AUDIO_A2DP_STATE_STANDBY) {
780 DBG("stream in standby, auto-start");
782 if (!resume_endpoint(out->ep))
785 out->audio_state = AUDIO_A2DP_STATE_STARTED;
788 if (out->audio_state != AUDIO_A2DP_STATE_STARTED) {
789 error("audio: stream not started");
793 if (out->ep->fd < 0) {
794 error("audio: no transport socket");
799 * currently Android audioflinger is not able to provide mono stream on
800 * A2DP output so down mixing needs to be done in hal-audio plugin.
803 * AudioFlinger::PlaybackThread::readOutputParameters()
804 * frameworks/av/services/audioflinger/Threads.cpp:1631
806 if (out->cfg.channels == AUDIO_CHANNEL_OUT_MONO) {
807 if (!out->downmix_buf) {
808 error("audio: downmix buffer not initialized");
812 downmix_to_mono(out, buffer, bytes);
814 in_buf = out->downmix_buf;
818 if (!write_data(out, in_buf, in_len))
824 static uint32_t out_get_sample_rate(const struct audio_stream *stream)
826 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
830 return out->cfg.rate;
833 static int out_set_sample_rate(struct audio_stream *stream, uint32_t rate)
835 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
839 if (rate != out->cfg.rate) {
840 warn("audio: cannot set sample rate to %d", rate);
847 static size_t out_get_buffer_size(const struct audio_stream *stream)
852 * We should return proper buffer size calculated by codec (so each
853 * input buffer is encoded into single media packed) but this does not
854 * work well with AudioFlinger and causes problems. For this reason we
855 * use magic value here and out_write code takes care of splitting
856 * input buffer into multiple media packets.
858 return FIXED_BUFFER_SIZE;
861 static uint32_t out_get_channels(const struct audio_stream *stream)
866 * AudioFlinger can only provide stereo stream, so we return it here and
867 * later we'll downmix this to mono in case codec requires it
870 return AUDIO_CHANNEL_OUT_STEREO;
873 static audio_format_t out_get_format(const struct audio_stream *stream)
875 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
879 return out->cfg.format;
882 static int out_set_format(struct audio_stream *stream, audio_format_t format)
888 static int out_standby(struct audio_stream *stream)
890 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
894 if (out->audio_state == AUDIO_A2DP_STATE_STARTED) {
895 if (ipc_suspend_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
897 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
903 static int out_dump(const struct audio_stream *stream, int fd)
909 static int out_set_parameters(struct audio_stream *stream, const char *kvpairs)
911 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
915 bool enter_suspend = false;
916 bool exit_suspend = false;
920 str = strdup(kvpairs);
924 kvpair = strtok_r(str, ";", &saveptr);
926 for (; kvpair && *kvpair; kvpair = strtok_r(NULL, ";", &saveptr)) {
929 keyval = strchr(kvpair, '=');
936 if (!strcmp(kvpair, "closing")) {
937 if (!strcmp(keyval, "true"))
938 out->audio_state = AUDIO_A2DP_STATE_NONE;
939 } else if (!strcmp(kvpair, "A2dpSuspended")) {
940 if (!strcmp(keyval, "true"))
941 enter_suspend = true;
949 if (enter_suspend && out->audio_state == AUDIO_A2DP_STATE_STARTED) {
950 if (ipc_suspend_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
952 out->audio_state = AUDIO_A2DP_STATE_SUSPENDED;
955 if (exit_suspend && out->audio_state == AUDIO_A2DP_STATE_SUSPENDED)
956 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
961 static char *out_get_parameters(const struct audio_stream *stream,
968 static uint32_t out_get_latency(const struct audio_stream_out *stream)
970 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
971 struct audio_endpoint *ep = out->ep;
976 pkt_duration = ep->codec->get_mediapacket_duration(ep->codec_data);
978 return FIXED_A2DP_PLAYBACK_LATENCY_MS + pkt_duration / 1000;
981 static int out_set_volume(struct audio_stream_out *stream, float left,
985 /* volume controlled in audioflinger mixer (digital) */
989 static int out_get_render_position(const struct audio_stream_out *stream,
990 uint32_t *dsp_frames)
996 static int out_add_audio_effect(const struct audio_stream *stream,
997 effect_handle_t effect)
1003 static int out_remove_audio_effect(const struct audio_stream *stream,
1004 effect_handle_t effect)
1010 static uint32_t in_get_sample_rate(const struct audio_stream *stream)
1016 static int in_set_sample_rate(struct audio_stream *stream, uint32_t rate)
1022 static size_t in_get_buffer_size(const struct audio_stream *stream)
1028 static uint32_t in_get_channels(const struct audio_stream *stream)
1034 static audio_format_t in_get_format(const struct audio_stream *stream)
1040 static int in_set_format(struct audio_stream *stream, audio_format_t format)
1046 static int in_standby(struct audio_stream *stream)
1052 static int in_dump(const struct audio_stream *stream, int fd)
1058 static int in_set_parameters(struct audio_stream *stream, const char *kvpairs)
1064 static char *in_get_parameters(const struct audio_stream *stream,
1071 static int in_set_gain(struct audio_stream_in *stream, float gain)
1077 static ssize_t in_read(struct audio_stream_in *stream, void *buffer,
1084 static uint32_t in_get_input_frames_lost(struct audio_stream_in *stream)
1090 static int in_add_audio_effect(const struct audio_stream *stream,
1091 effect_handle_t effect)
1097 static int in_remove_audio_effect(const struct audio_stream *stream,
1098 effect_handle_t effect)
1104 static int audio_open_output_stream(struct audio_hw_device *dev,
1105 audio_io_handle_t handle,
1106 audio_devices_t devices,
1107 audio_output_flags_t flags,
1108 struct audio_config *config,
1109 struct audio_stream_out **stream_out)
1112 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
1113 struct a2dp_stream_out *out;
1115 out = calloc(1, sizeof(struct a2dp_stream_out));
1121 out->stream.common.get_sample_rate = out_get_sample_rate;
1122 out->stream.common.set_sample_rate = out_set_sample_rate;
1123 out->stream.common.get_buffer_size = out_get_buffer_size;
1124 out->stream.common.get_channels = out_get_channels;
1125 out->stream.common.get_format = out_get_format;
1126 out->stream.common.set_format = out_set_format;
1127 out->stream.common.standby = out_standby;
1128 out->stream.common.dump = out_dump;
1129 out->stream.common.set_parameters = out_set_parameters;
1130 out->stream.common.get_parameters = out_get_parameters;
1131 out->stream.common.add_audio_effect = out_add_audio_effect;
1132 out->stream.common.remove_audio_effect = out_remove_audio_effect;
1133 out->stream.get_latency = out_get_latency;
1134 out->stream.set_volume = out_set_volume;
1135 out->stream.write = out_write;
1136 out->stream.get_render_position = out_get_render_position;
1138 /* We want to autoselect opened endpoint */
1141 if (!open_endpoint(&out->ep, &out->cfg))
1144 DBG("rate=%d channels=%d format=%d", out->cfg.rate,
1145 out->cfg.channels, out->cfg.format);
1147 if (out->cfg.channels == AUDIO_CHANNEL_OUT_MONO) {
1148 out->downmix_buf = malloc(FIXED_BUFFER_SIZE / 2);
1149 if (!out->downmix_buf)
1153 *stream_out = &out->stream;
1154 a2dp_dev->out = out;
1156 out->audio_state = AUDIO_A2DP_STATE_STANDBY;
1161 error("audio: cannot open output stream");
1167 static void audio_close_output_stream(struct audio_hw_device *dev,
1168 struct audio_stream_out *stream)
1170 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
1171 struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
1175 close_endpoint(a2dp_dev->out->ep);
1177 free(out->downmix_buf);
1180 a2dp_dev->out = NULL;
1183 static int audio_set_parameters(struct audio_hw_device *dev,
1184 const char *kvpairs)
1186 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
1187 struct a2dp_stream_out *out = a2dp_dev->out;
1194 return out->stream.common.set_parameters((struct audio_stream *) out,
1198 static char *audio_get_parameters(const struct audio_hw_device *dev,
1205 static int audio_init_check(const struct audio_hw_device *dev)
1211 static int audio_set_voice_volume(struct audio_hw_device *dev, float volume)
1217 static int audio_set_master_volume(struct audio_hw_device *dev, float volume)
1223 static int audio_set_mode(struct audio_hw_device *dev, int mode)
1229 static int audio_set_mic_mute(struct audio_hw_device *dev, bool state)
1235 static int audio_get_mic_mute(const struct audio_hw_device *dev, bool *state)
1241 static size_t audio_get_input_buffer_size(const struct audio_hw_device *dev,
1242 const struct audio_config *config)
1248 static int audio_open_input_stream(struct audio_hw_device *dev,
1249 audio_io_handle_t handle,
1250 audio_devices_t devices,
1251 struct audio_config *config,
1252 struct audio_stream_in **stream_in)
1254 struct audio_stream_in *in;
1258 in = calloc(1, sizeof(struct audio_stream_in));
1262 in->common.get_sample_rate = in_get_sample_rate;
1263 in->common.set_sample_rate = in_set_sample_rate;
1264 in->common.get_buffer_size = in_get_buffer_size;
1265 in->common.get_channels = in_get_channels;
1266 in->common.get_format = in_get_format;
1267 in->common.set_format = in_set_format;
1268 in->common.standby = in_standby;
1269 in->common.dump = in_dump;
1270 in->common.set_parameters = in_set_parameters;
1271 in->common.get_parameters = in_get_parameters;
1272 in->common.add_audio_effect = in_add_audio_effect;
1273 in->common.remove_audio_effect = in_remove_audio_effect;
1274 in->set_gain = in_set_gain;
1276 in->get_input_frames_lost = in_get_input_frames_lost;
1283 static void audio_close_input_stream(struct audio_hw_device *dev,
1284 struct audio_stream_in *stream_in)
1290 static int audio_dump(const audio_hw_device_t *device, int fd)
1296 static void unload_codec(void *data)
1298 struct audio_codec *codec = data;
1304 static int audio_close(hw_device_t *device)
1306 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *)device;
1310 unregister_endpoints();
1312 queue_destroy(loaded_codecs, unload_codec);
1313 loaded_codecs = NULL;
1315 shutdown(listen_sk, SHUT_RDWR);
1316 shutdown(audio_sk, SHUT_RDWR);
1318 pthread_join(ipc_th, NULL);
1327 static void *ipc_handler(void *data)
1336 DBG("Waiting for connection ...");
1338 sk = accept(listen_sk, NULL, NULL);
1345 if (err != ECONNABORTED && err != EINVAL)
1346 error("audio: Failed to accept socket: %d (%s)",
1347 err, strerror(err));
1352 pthread_mutex_lock(&sk_mutex);
1354 pthread_mutex_unlock(&sk_mutex);
1356 DBG("Audio IPC: Connected");
1358 if (register_endpoints() != AUDIO_STATUS_SUCCESS) {
1359 error("audio: Failed to register endpoints");
1361 unregister_endpoints();
1363 pthread_mutex_lock(&sk_mutex);
1364 shutdown(audio_sk, SHUT_RDWR);
1367 pthread_mutex_unlock(&sk_mutex);
1372 memset(&pfd, 0, sizeof(pfd));
1374 pfd.events = POLLHUP | POLLERR | POLLNVAL;
1376 /* Check if socket is still alive. Empty while loop.*/
1377 while (poll(&pfd, 1, -1) < 0 && errno == EINTR);
1379 info("Audio HAL: Socket closed");
1381 pthread_mutex_lock(&sk_mutex);
1384 pthread_mutex_unlock(&sk_mutex);
1387 /* audio_sk is closed at this point, just cleanup endpoints states */
1388 memset(audio_endpoints, 0, sizeof(audio_endpoints));
1390 info("Closing Audio IPC thread");
1394 static int audio_ipc_init(void)
1396 struct sockaddr_un addr;
1402 sk = socket(PF_LOCAL, SOCK_SEQPACKET, 0);
1405 error("audio: Failed to create socket: %d (%s)", -err,
1410 memset(&addr, 0, sizeof(addr));
1411 addr.sun_family = AF_UNIX;
1413 memcpy(addr.sun_path, BLUEZ_AUDIO_SK_PATH,
1414 sizeof(BLUEZ_AUDIO_SK_PATH));
1416 if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1418 error("audio: Failed to bind socket: %d (%s)", -err,
1423 if (listen(sk, 1) < 0) {
1425 error("audio: Failed to listen on the socket: %d (%s)", -err,
1432 err = pthread_create(&ipc_th, NULL, ipc_handler, NULL);
1436 error("audio: Failed to start Audio IPC thread: %d (%s)",
1437 -err, strerror(-err));
1448 static int audio_open(const hw_module_t *module, const char *name,
1449 hw_device_t **device)
1451 struct a2dp_audio_dev *a2dp_dev;
1457 if (strcmp(name, AUDIO_HARDWARE_INTERFACE)) {
1458 error("audio: interface %s not matching [%s]", name,
1459 AUDIO_HARDWARE_INTERFACE);
1463 err = audio_ipc_init();
1467 a2dp_dev = calloc(1, sizeof(struct a2dp_audio_dev));
1471 a2dp_dev->dev.common.tag = HARDWARE_DEVICE_TAG;
1472 a2dp_dev->dev.common.version = AUDIO_DEVICE_API_VERSION_CURRENT;
1473 a2dp_dev->dev.common.module = (struct hw_module_t *) module;
1474 a2dp_dev->dev.common.close = audio_close;
1476 a2dp_dev->dev.init_check = audio_init_check;
1477 a2dp_dev->dev.set_voice_volume = audio_set_voice_volume;
1478 a2dp_dev->dev.set_master_volume = audio_set_master_volume;
1479 a2dp_dev->dev.set_mode = audio_set_mode;
1480 a2dp_dev->dev.set_mic_mute = audio_set_mic_mute;
1481 a2dp_dev->dev.get_mic_mute = audio_get_mic_mute;
1482 a2dp_dev->dev.set_parameters = audio_set_parameters;
1483 a2dp_dev->dev.get_parameters = audio_get_parameters;
1484 a2dp_dev->dev.get_input_buffer_size = audio_get_input_buffer_size;
1485 a2dp_dev->dev.open_output_stream = audio_open_output_stream;
1486 a2dp_dev->dev.close_output_stream = audio_close_output_stream;
1487 a2dp_dev->dev.open_input_stream = audio_open_input_stream;
1488 a2dp_dev->dev.close_input_stream = audio_close_input_stream;
1489 a2dp_dev->dev.dump = audio_dump;
1491 loaded_codecs = queue_new();
1493 for (i = 0; i < NUM_CODECS; i++) {
1494 audio_codec_get_t get_codec = audio_codecs[i];
1495 const struct audio_codec *codec = get_codec();
1497 if (codec->load && !codec->load())
1500 queue_push_tail(loaded_codecs, (void *) codec);
1504 * Note that &a2dp_dev->dev.common is the same pointer as a2dp_dev.
1505 * This results from the structure of following structs:a2dp_audio_dev,
1506 * audio_hw_device. We will rely on this later in the code.
1508 *device = &a2dp_dev->dev.common;
1513 static struct hw_module_methods_t hal_module_methods = {
1517 struct audio_module HAL_MODULE_INFO_SYM = {
1519 .tag = HARDWARE_MODULE_TAG,
1522 .id = AUDIO_HARDWARE_MODULE_ID,
1523 .name = "A2DP Bluez HW HAL",
1524 .author = "Intel Corporation",
1525 .methods = &hal_module_methods,