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Code Issues Releases Wiki Activity

Fix audio thread close race condition.

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This commit is contained in:
Johns 2014-09-23 12:36:39 +02:00
parent 8b7402a397
commit a3c0052c4b
2 changed files with 24 additions and 6 deletions
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1
ChangeLog
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@ -1,6 +1,7 @@
User johns
Date:
Fix audio thread close race condition.
Support ffmpeg new AVFrame API in the audio codec.
Config for automatic AES parameters.
Use GCC built-in functions for atomic operations.

29
audio.c
View File

@ -149,6 +149,7 @@ static int AudioBufferTime = 336; ///< audio buffer time in ms
static pthread_t AudioThread; ///< audio play thread
static pthread_mutex_t AudioMutex; ///< audio condition mutex
static pthread_cond_t AudioStartCond; ///< condition variable
static char AudioThreadStop; ///< stop audio thread
#else
static const int AudioThread; ///< dummy audio thread
#endif
@ -942,7 +943,6 @@ static int AlsaThread(void)
return -1;
}
for (;;) {
pthread_testcancel();
if (AudioPaused) {
return 1;
}
@ -1216,7 +1216,8 @@ static int AlsaSetup(int *freq, int *channels, int passthrough)
snd_pcm_t *handle;
handle = AlsaPCMHandle;
// FIXME: need lock
// no lock needed, thread exit in main loop only
//Debug(3, "audio: %s [\n", __FUNCTION__);
AlsaPCMHandle = NULL; // other threads should check handle
snd_pcm_close(handle);
if (AudioAlsaCloseOpenDelay) {
@ -1227,6 +1228,7 @@ static int AlsaSetup(int *freq, int *channels, int passthrough)
return -1;
}
AlsaPCMHandle = handle;
//Debug(3, "audio: %s ]\n", __FUNCTION__);
}
for (;;) {
@ -1548,7 +1550,6 @@ static int OssThread(void)
for (;;) {
struct pollfd fds[1];
pthread_testcancel();
if (AudioPaused) {
return 1;
}
@ -2050,6 +2051,12 @@ static void *AudioPlayHandlerThread(void *dummy)
{
Debug(3, "audio: play thread started\n");
for (;;) {
// check if we should stop the thread
if (AudioThreadStop) {
Debug(3, "audio: play thread stopped\n");
return PTHREAD_CANCELED;
}
Debug(3, "audio: wait on start condition\n");
pthread_mutex_lock(&AudioMutex);
AudioRunning = 0;
@ -2072,6 +2079,11 @@ static void *AudioPlayHandlerThread(void *dummy)
int err;
int i;
// check if we should stop the thread
if (AudioThreadStop) {
Debug(3, "audio: play thread stopped\n");
return PTHREAD_CANCELED;
}
// look if there is a flush command in the queue
flush = 0;
filled = atomic_read(&AudioRingFilled);
@ -2156,6 +2168,7 @@ static void *AudioPlayHandlerThread(void *dummy)
*/
static void AudioInitThread(void)
{
AudioThreadStop = 0;
pthread_mutex_init(&AudioMutex, NULL);
pthread_cond_init(&AudioStartCond, NULL);
pthread_create(&AudioThread, NULL, AudioPlayHandlerThread, NULL);
@ -2169,10 +2182,12 @@ static void AudioExitThread(void)
{
void *retval;
Debug(3, "audio: %s\n", __FUNCTION__);
if (AudioThread) {
if (pthread_cancel(AudioThread)) {
Error(_("audio: can't queue cancel play thread\n"));
}
AudioThreadStop = 1;
AudioRunning = 1; // wakeup thread, if needed
pthread_cond_signal(&AudioStartCond);
if (pthread_join(AudioThread, &retval) || retval != PTHREAD_CANCELED) {
Error(_("audio: can't cancel play thread\n"));
}
@ -2994,6 +3009,8 @@ void AudioExit(void)
{
const AudioModule *module;
Debug(3, "audio: %s\n", __FUNCTION__);
#ifdef USE_AUDIO_THREAD
if (AudioUsedModule->Thread) { // supports threads
AudioExitThread();