| /* AudioDaemon.cpp |
| Copyright (c) 2012-2015, The Linux Foundation. All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are |
| met: |
| * Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| * Redistributions in binary form must reproduce the above |
| copyright notice, this list of conditions and the following |
| disclaimer in the documentation and/or other materials provided |
| with the distribution. |
| * Neither the name of The Linux Foundation nor the names of its |
| contributors may be used to endorse or promote products derived |
| from this software without specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.*/ |
| |
| #define LOG_TAG "AudioDaemon" |
| #define LOG_NDEBUG 0 |
| #define LOG_NDDEBUG 0 |
| |
| #include <dirent.h> |
| #include <media/AudioSystem.h> |
| #include <sys/poll.h> |
| |
| #include "AudioDaemon.h" |
| |
| #define CPE_MAGIC_NUM 0x2000 |
| #define MAX_CPE_SLEEP_RETRY 2 |
| #define CPE_SLEEP_WAIT 100 |
| |
| #define MAX_SLEEP_RETRY 100 |
| #define AUDIO_INIT_SLEEP_WAIT 100 /* 100 ms */ |
| |
| int bootup_complete = 0; |
| bool cpe_bootup_complete = false; |
| |
| namespace android { |
| |
| AudioDaemon::AudioDaemon() : Thread(false) { |
| } |
| |
| AudioDaemon::~AudioDaemon() { |
| putStateFDs(mSndCardFd); |
| } |
| |
| void AudioDaemon::onFirstRef() { |
| ALOGV("Start audiod daemon"); |
| run("AudioDaemon", PRIORITY_URGENT_AUDIO); |
| } |
| |
| void AudioDaemon::binderDied(const wp<IBinder>& who) |
| { |
| requestExit(); |
| } |
| |
| bool AudioDaemon::getStateFDs(std::vector<std::pair<int,int> > &sndcardFdPair) |
| { |
| FILE *fp; |
| int fd; |
| char *ptr, *saveptr; |
| char buffer[128]; |
| int line = 0; |
| String8 path; |
| int sndcard; |
| const char* cards = "/proc/asound/cards"; |
| |
| if ((fp = fopen(cards, "r")) == NULL) { |
| ALOGE("Cannot open %s file to get list of sound cars", cards); |
| return false; |
| } |
| |
| sndcardFdPair.clear(); |
| memset(buffer, 0x0, sizeof(buffer)); |
| while ((fgets(buffer, sizeof(buffer), fp) != NULL)) { |
| if (line % 2) |
| continue; |
| ptr = strtok_r(buffer, " [", &saveptr); |
| if (ptr) { |
| path = "/proc/asound/card"; |
| path += ptr; |
| path += "/state"; |
| ALOGD("Opening sound card state : %s", path.string()); |
| fd = open(path.string(), O_RDONLY); |
| if (fd == -1) { |
| ALOGE("Open %s failed : %s", path.string(), strerror(errno)); |
| } else { |
| /* returns vector of pair<sndcard, fd> */ |
| sndcard = atoi(ptr); |
| sndcardFdPair.push_back(std::make_pair(sndcard, fd)); |
| } |
| } |
| line++; |
| } |
| |
| ALOGV("%s: %d sound cards detected", __func__, sndcardFdPair.size()); |
| fclose(fp); |
| |
| return sndcardFdPair.size() > 0 ? true : false; |
| } |
| |
| void AudioDaemon::putStateFDs(std::vector<std::pair<int,int> > &sndcardFdPair) |
| { |
| unsigned int i; |
| for (i = 0; i < sndcardFdPair.size(); i++) |
| close(sndcardFdPair[i].second); |
| sndcardFdPair.clear(); |
| } |
| |
| bool AudioDaemon::getDeviceEventFDs() |
| { |
| const char* events_dir = "/sys/class/switch/"; |
| DIR *dp; |
| struct dirent* in_file; |
| int fd; |
| String8 path; |
| String8 d_name; |
| |
| if ((dp = opendir(events_dir)) == NULL) { |
| ALOGE("Cannot open switch directory to get list of audio events %s", events_dir); |
| return false; |
| } |
| |
| mAudioEvents.clear(); |
| mAudioEventsStatus.clear(); |
| |
| while ((in_file = readdir(dp)) != NULL) { |
| |
| if (!strstr(in_file->d_name, "qc_")) |
| continue; |
| ALOGD(" Found event file = %s", in_file->d_name); |
| path = "/sys/class/switch/"; |
| path += in_file->d_name; |
| path += "/state"; |
| |
| ALOGE("Opening audio event state : %s ", path.string()); |
| fd = open(path.string(), O_RDONLY); |
| if (fd == -1) { |
| ALOGE("Open %s failed : %s", path.string(), strerror(errno)); |
| } else { |
| d_name = in_file->d_name; |
| mAudioEvents.push_back(std::make_pair(d_name, fd)); |
| mAudioEventsStatus.push_back(std::make_pair(d_name, 0)); |
| ALOGD("event status mAudioEventsStatus= %s", |
| mAudioEventsStatus[0].first.string()); |
| } |
| } |
| |
| ALOGV("%s: %d audio device event detected", |
| __func__, |
| mAudioEvents.size()); |
| |
| closedir(dp); |
| return mAudioEvents.size() > 0 ? true : false; |
| |
| } |
| |
| void AudioDaemon::putDeviceEventFDs() |
| { |
| unsigned int i; |
| for (i = 0; i < mAudioEvents.size(); i++) { |
| close(mAudioEvents[i].second); |
| delete(mAudioEvents[i].first); |
| } |
| mAudioEvents.clear(); |
| mAudioEventsStatus.clear(); |
| } |
| |
| void AudioDaemon::checkEventState(int fd, int index) |
| { |
| char state_buf[2]; |
| audio_event_status event_cur_state = audio_event_off; |
| |
| if (!read(fd, (void *)state_buf, 1)) { |
| ALOGE("Error receiving device state event (%s)", strerror(errno)); |
| } else { |
| state_buf[1] = '\0'; |
| if (atoi(state_buf) != mAudioEventsStatus[index].second) { |
| ALOGD("notify audio HAL %s", |
| mAudioEvents[index].first.string()); |
| mAudioEventsStatus[index].second = atoi(state_buf); |
| |
| if (mAudioEventsStatus[index].second == 1) |
| event_cur_state = audio_event_on; |
| else |
| event_cur_state = audio_event_off; |
| notifyAudioSystemEventStatus( |
| mAudioEventsStatus[index].first.string(), |
| event_cur_state); |
| } |
| } |
| lseek(fd, 0, SEEK_SET); |
| } |
| |
| status_t AudioDaemon::readyToRun() { |
| |
| ALOGV("readyToRun: open snd card state node files"); |
| return NO_ERROR; |
| } |
| |
| bool AudioDaemon::threadLoop() |
| { |
| int max = -1; |
| unsigned int i; |
| bool ret = true; |
| notify_status cur_state = snd_card_offline; |
| struct pollfd *pfd = NULL; |
| char rd_buf[9]; |
| unsigned int sleepRetry = 0; |
| bool audioInitDone = false; |
| int fd = 0; |
| char path[50]; |
| notify_status cur_cpe_state = cpe_offline; |
| notify_status prev_cpe_state = cpe_offline; |
| unsigned int cpe_cnt = CPE_MAGIC_NUM; |
| unsigned int num_snd_cards = 0; |
| |
| ALOGV("Start threadLoop()"); |
| while (audioInitDone == false && sleepRetry < MAX_SLEEP_RETRY) { |
| if (mSndCardFd.empty() && !getStateFDs(mSndCardFd)) { |
| ALOGE("Sleeping for 100 ms"); |
| usleep(AUDIO_INIT_SLEEP_WAIT*1000); |
| sleepRetry++; |
| } else { |
| audioInitDone = true; |
| } |
| } |
| |
| if (!getDeviceEventFDs()) { |
| ALOGE("No audio device events detected"); |
| } |
| |
| if (audioInitDone == false) { |
| ALOGE("Sound Card is empty!!!"); |
| goto thread_exit; |
| } |
| |
| /* soundcards are opened, now get the cpe state nodes */ |
| num_snd_cards = mSndCardFd.size(); |
| for (i = 0; i < num_snd_cards; i++) { |
| snprintf(path, sizeof(path), "/proc/asound/card%d/cpe0_state", mSndCardFd[i].first); |
| ALOGD("Opening cpe0_state : %s", path); |
| sleepRetry = 0; |
| do { |
| fd = open(path, O_RDONLY); |
| if (fd == -1) { |
| sleepRetry++; |
| ALOGE("CPE state open %s failed %s, Retrying %d", |
| path, strerror(errno), sleepRetry); |
| usleep(CPE_SLEEP_WAIT*1000); |
| } else { |
| ALOGD("cpe state opened: %s", path); |
| mSndCardFd.push_back(std::make_pair(cpe_cnt++, fd)); |
| } |
| }while ((fd == -1) && sleepRetry < MAX_CPE_SLEEP_RETRY); |
| } |
| ALOGD("number of sndcards %d CPEs %d", i, cpe_cnt - CPE_MAGIC_NUM); |
| |
| pfd = new pollfd[mSndCardFd.size() + mAudioEvents.size()]; |
| bzero(pfd, (sizeof(*pfd) * mSndCardFd.size() + |
| sizeof(*pfd) * mAudioEvents.size())); |
| for (i = 0; i < mSndCardFd.size(); i++) { |
| pfd[i].fd = mSndCardFd[i].second; |
| pfd[i].events = POLLPRI; |
| } |
| |
| /*insert all audio events*/ |
| for(i = 0; i < mAudioEvents.size(); i++) { |
| pfd[i+mSndCardFd.size()].fd = mAudioEvents[i].second; |
| pfd[i+mSndCardFd.size()].events = POLLPRI; |
| } |
| |
| ALOGD("read for sound card state change before while"); |
| for (i = 0; i < mSndCardFd.size(); i++) { |
| if (!read(pfd[i].fd, (void *)rd_buf, 8)) { |
| ALOGE("Error receiving sound card state event (%s)", strerror(errno)); |
| ret = false; |
| } else { |
| rd_buf[8] = '\0'; |
| lseek(pfd[i].fd, 0, SEEK_SET); |
| |
| if(mSndCardFd[i].first >= CPE_MAGIC_NUM) { |
| ALOGD("CPE %d state file content: %s before while", |
| mSndCardFd[i].first - CPE_MAGIC_NUM, rd_buf); |
| if (strstr(rd_buf, "OFFLINE")) { |
| ALOGD("CPE state offline"); |
| cur_cpe_state = cpe_offline; |
| } else if (strstr(rd_buf, "ONLINE")){ |
| ALOGD("CPE state online"); |
| cur_cpe_state = cpe_online; |
| } else { |
| ALOGE("ERROR CPE rd_buf %s", rd_buf); |
| } |
| if (cur_cpe_state == cpe_online && !cpe_bootup_complete) { |
| cpe_bootup_complete = true; |
| ALOGD("CPE boot up completed before polling"); |
| } |
| prev_cpe_state = cur_cpe_state; |
| } |
| else { |
| ALOGD("sound card state file content: %s before while",rd_buf); |
| if (strstr(rd_buf, "OFFLINE")) { |
| ALOGE("put cur_state to offline"); |
| cur_state = snd_card_offline; |
| } else if (strstr(rd_buf, "ONLINE")){ |
| ALOGE("put cur_state to online"); |
| cur_state = snd_card_online; |
| } else { |
| ALOGE("ERROR rd_buf %s", rd_buf); |
| } |
| |
| ALOGD("cur_state=%d, bootup_complete=%d", cur_state, cur_state ); |
| if (cur_state == snd_card_online && !bootup_complete) { |
| bootup_complete = 1; |
| ALOGE("sound card up is deteced before while"); |
| ALOGE("bootup_complete set to 1"); |
| } |
| } |
| } |
| } |
| |
| ALOGE("read for event state change before while"); |
| for (i = 0; i < mAudioEvents.size(); i++){ |
| checkEventState(pfd[i+mSndCardFd.size()].fd, i); |
| } |
| |
| while (1) { |
| ALOGD("poll() for sound card state change "); |
| if (poll(pfd, (mSndCardFd.size() + mAudioEvents.size()), -1) < 0) { |
| ALOGE("poll() failed (%s)", strerror(errno)); |
| ret = false; |
| break; |
| } |
| |
| ALOGD("out of poll() for sound card state change, SNDCARD size=%d", mSndCardFd.size()); |
| for (i = 0; i < mSndCardFd.size(); i++) { |
| if (pfd[i].revents & POLLPRI) { |
| if (!read(pfd[i].fd, (void *)rd_buf, 8)) { |
| ALOGE("Error receiving sound card %d state event (%s)", |
| mSndCardFd[i].first, strerror(errno)); |
| ret = false; |
| } else { |
| rd_buf[8] = '\0'; |
| lseek(pfd[i].fd, 0, SEEK_SET); |
| |
| if(mSndCardFd[i].first >= CPE_MAGIC_NUM) { |
| if (strstr(rd_buf, "OFFLINE")) |
| cur_cpe_state = cpe_offline; |
| else if (strstr(rd_buf, "ONLINE")) |
| cur_cpe_state = cpe_online; |
| else |
| ALOGE("ERROR CPE rd_buf %s", rd_buf); |
| |
| if (cpe_bootup_complete && (prev_cpe_state != cur_cpe_state)) { |
| ALOGD("CPE state is %d, nofity AudioSystem", cur_cpe_state); |
| notifyAudioSystem(mSndCardFd[i].first, cur_cpe_state, CPE_STATE); |
| } |
| if (!cpe_bootup_complete && (cur_cpe_state == cpe_online)) { |
| cpe_bootup_complete = true; |
| ALOGD("CPE boot up completed"); |
| } |
| prev_cpe_state = cur_cpe_state; |
| } |
| else { |
| ALOGV("sound card state file content: %s, bootup_complete=%d",rd_buf, bootup_complete); |
| if (strstr(rd_buf, "OFFLINE")) { |
| cur_state = snd_card_offline; |
| } else if (strstr(rd_buf, "ONLINE")){ |
| cur_state = snd_card_online; |
| } |
| |
| if (bootup_complete) { |
| ALOGV("bootup_complete, so NofityAudioSystem"); |
| notifyAudioSystem(mSndCardFd[i].first, cur_state, SND_CARD_STATE); |
| } |
| |
| if (cur_state == snd_card_online && !bootup_complete) { |
| bootup_complete = 1; |
| } |
| } |
| } |
| } |
| } |
| for (i = 0; i < mAudioEvents.size(); i++) { |
| if (pfd[i + mSndCardFd.size()].revents & POLLPRI) { |
| ALOGE("EVENT recieved pfd[i].revents= 0x%x %d", |
| pfd[i + mSndCardFd.size()].revents, |
| mAudioEvents[i].second); |
| |
| checkEventState(pfd[i + mSndCardFd.size()].fd, i); |
| } |
| } |
| } |
| |
| putStateFDs(mSndCardFd); |
| putDeviceEventFDs(); |
| delete [] pfd; |
| |
| thread_exit: |
| ALOGV("Exiting Poll ThreadLoop"); |
| return ret; |
| } |
| |
| void AudioDaemon::notifyAudioSystem(int snd_card, |
| notify_status status, |
| notify_status_type type) |
| { |
| |
| String8 str; |
| char buf[4] = {0,}; |
| |
| if (type == CPE_STATE) { |
| str = "CPE_STATUS="; |
| snprintf(buf, sizeof(buf), "%d", snd_card - CPE_MAGIC_NUM); |
| str += buf; |
| if (status == cpe_online) |
| str += ",ONLINE"; |
| else |
| str += ",OFFLINE"; |
| } |
| else { |
| str = "SND_CARD_STATUS="; |
| snprintf(buf, sizeof(buf), "%d", snd_card); |
| str += buf; |
| if (status == snd_card_online) |
| str += ",ONLINE"; |
| else |
| str += ",OFFLINE"; |
| } |
| ALOGV("%s: notifyAudioSystem : %s", __func__, str.string()); |
| AudioSystem::setParameters(0, str); |
| } |
| |
| void AudioDaemon::notifyAudioSystemEventStatus(const char* event, |
| audio_event_status status) { |
| |
| String8 str; |
| str += AUDIO_PARAMETER_KEY_EXT_AUDIO_DEVICE; |
| str += "="; |
| str += event; |
| |
| if (status == audio_event_on) |
| str += ",ON"; |
| else |
| str += ",OFF"; |
| ALOGD("%s: notifyAudioSystemEventStatus : %s", __func__, str.string()); |
| AudioSystem::setParameters(0, str); |
| } |
| } |
