mirror of
https://github.com/Ryujinx/SDL.git
synced 2024-12-23 02:45:36 +00:00
audio: Tighten up possession of detectionLock during device open.
We don't need it for most of the time, and holding it during the backend's OpenDevice upsets ThreadSanitizer vs our PulseAudio code. Fixes #7427.
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e51760e111
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c331b64d79
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@ -1292,25 +1292,10 @@ static SDL_AudioDeviceID open_audio_device(const char *devname, int iscapture,
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return 0;
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return 0;
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}
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}
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SDL_LockMutex(current_audio.detectionLock);
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/* Find an available device ID... */
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for (id = min_id - 1; id < SDL_arraysize(open_devices); id++) {
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if (open_devices[id] == NULL) {
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break;
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}
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}
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if (id == SDL_arraysize(open_devices)) {
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SDL_SetError("Too many open audio devices");
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SDL_UnlockMutex(current_audio.detectionLock);
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return 0;
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}
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if (!obtained) {
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if (!obtained) {
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obtained = &_obtained;
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obtained = &_obtained;
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}
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}
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if (!prepare_audiospec(desired, obtained)) {
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if (!prepare_audiospec(desired, obtained)) {
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SDL_UnlockMutex(current_audio.detectionLock);
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return 0;
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return 0;
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}
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}
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@ -1332,11 +1317,11 @@ static SDL_AudioDeviceID open_audio_device(const char *devname, int iscapture,
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if ((iscapture) && (current_audio.impl.OnlyHasDefaultCaptureDevice)) {
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if ((iscapture) && (current_audio.impl.OnlyHasDefaultCaptureDevice)) {
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if ((devname) && (SDL_strcmp(devname, DEFAULT_INPUT_DEVNAME) != 0)) {
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if ((devname) && (SDL_strcmp(devname, DEFAULT_INPUT_DEVNAME) != 0)) {
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SDL_SetError("No such device");
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SDL_SetError("No such device");
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SDL_UnlockMutex(current_audio.detectionLock);
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return 0;
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return 0;
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}
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}
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devname = NULL;
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devname = NULL;
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SDL_LockMutex(current_audio.detectionLock);
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for (i = 0; i < SDL_arraysize(open_devices); i++) {
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for (i = 0; i < SDL_arraysize(open_devices); i++) {
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if ((open_devices[i]) && (open_devices[i]->iscapture)) {
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if ((open_devices[i]) && (open_devices[i]->iscapture)) {
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SDL_SetError("Audio device already open");
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SDL_SetError("Audio device already open");
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@ -1344,14 +1329,15 @@ static SDL_AudioDeviceID open_audio_device(const char *devname, int iscapture,
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return 0;
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return 0;
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}
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}
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}
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}
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SDL_UnlockMutex(current_audio.detectionLock);
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} else if ((!iscapture) && (current_audio.impl.OnlyHasDefaultOutputDevice)) {
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} else if ((!iscapture) && (current_audio.impl.OnlyHasDefaultOutputDevice)) {
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if ((devname) && (SDL_strcmp(devname, DEFAULT_OUTPUT_DEVNAME) != 0)) {
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if ((devname) && (SDL_strcmp(devname, DEFAULT_OUTPUT_DEVNAME) != 0)) {
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SDL_UnlockMutex(current_audio.detectionLock);
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SDL_SetError("No such device");
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SDL_SetError("No such device");
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return 0;
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return 0;
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}
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}
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devname = NULL;
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devname = NULL;
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SDL_LockMutex(current_audio.detectionLock);
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for (i = 0; i < SDL_arraysize(open_devices); i++) {
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for (i = 0; i < SDL_arraysize(open_devices); i++) {
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if ((open_devices[i]) && (!open_devices[i]->iscapture)) {
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if ((open_devices[i]) && (!open_devices[i]->iscapture)) {
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SDL_UnlockMutex(current_audio.detectionLock);
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SDL_UnlockMutex(current_audio.detectionLock);
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@ -1359,6 +1345,7 @@ static SDL_AudioDeviceID open_audio_device(const char *devname, int iscapture,
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return 0;
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return 0;
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}
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}
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}
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}
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SDL_UnlockMutex(current_audio.detectionLock);
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} else if (devname != NULL) {
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} else if (devname != NULL) {
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/* if the app specifies an exact string, we can pass the backend
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/* if the app specifies an exact string, we can pass the backend
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an actual device handle thingey, which saves them the effort of
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an actual device handle thingey, which saves them the effort of
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@ -1367,19 +1354,20 @@ static SDL_AudioDeviceID open_audio_device(const char *devname, int iscapture,
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It might still need to open a device based on the string for,
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It might still need to open a device based on the string for,
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say, a network audio server, but this optimizes some cases. */
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say, a network audio server, but this optimizes some cases. */
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SDL_AudioDeviceItem *item;
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SDL_AudioDeviceItem *item;
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SDL_LockMutex(current_audio.detectionLock);
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for (item = iscapture ? current_audio.inputDevices : current_audio.outputDevices; item; item = item->next) {
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for (item = iscapture ? current_audio.inputDevices : current_audio.outputDevices; item; item = item->next) {
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if ((item->handle != NULL) && (SDL_strcmp(item->name, devname) == 0)) {
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if ((item->handle != NULL) && (SDL_strcmp(item->name, devname) == 0)) {
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handle = item->handle;
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handle = item->handle;
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break;
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break;
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}
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}
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}
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}
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SDL_UnlockMutex(current_audio.detectionLock);
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}
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}
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if (!current_audio.impl.AllowsArbitraryDeviceNames) {
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if (!current_audio.impl.AllowsArbitraryDeviceNames) {
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/* has to be in our device list, or the default device. */
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/* has to be in our device list, or the default device. */
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if ((handle == NULL) && (devname != NULL)) {
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if ((handle == NULL) && (devname != NULL)) {
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SDL_SetError("No such device.");
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SDL_SetError("No such device.");
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SDL_UnlockMutex(current_audio.detectionLock);
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return 0;
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return 0;
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}
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}
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}
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}
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@ -1387,10 +1375,8 @@ static SDL_AudioDeviceID open_audio_device(const char *devname, int iscapture,
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device = (SDL_AudioDevice *)SDL_calloc(1, sizeof(SDL_AudioDevice));
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device = (SDL_AudioDevice *)SDL_calloc(1, sizeof(SDL_AudioDevice));
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if (device == NULL) {
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if (device == NULL) {
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SDL_OutOfMemory();
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SDL_OutOfMemory();
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SDL_UnlockMutex(current_audio.detectionLock);
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return 0;
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return 0;
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}
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}
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device->id = id + 1;
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device->spec = *obtained;
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device->spec = *obtained;
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device->iscapture = iscapture ? SDL_TRUE : SDL_FALSE;
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device->iscapture = iscapture ? SDL_TRUE : SDL_FALSE;
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device->handle = handle;
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device->handle = handle;
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@ -1404,7 +1390,6 @@ static SDL_AudioDeviceID open_audio_device(const char *devname, int iscapture,
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device->mixer_lock = SDL_CreateMutex();
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device->mixer_lock = SDL_CreateMutex();
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if (device->mixer_lock == NULL) {
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if (device->mixer_lock == NULL) {
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close_audio_device(device);
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close_audio_device(device);
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SDL_UnlockMutex(current_audio.detectionLock);
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SDL_SetError("Couldn't create mixer lock");
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SDL_SetError("Couldn't create mixer lock");
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return 0;
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return 0;
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}
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}
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@ -1419,7 +1404,6 @@ static SDL_AudioDeviceID open_audio_device(const char *devname, int iscapture,
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if (current_audio.impl.OpenDevice(device, devname) < 0) {
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if (current_audio.impl.OpenDevice(device, devname) < 0) {
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close_audio_device(device);
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close_audio_device(device);
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SDL_UnlockMutex(current_audio.detectionLock);
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return 0;
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return 0;
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}
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}
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@ -1475,7 +1459,6 @@ static SDL_AudioDeviceID open_audio_device(const char *devname, int iscapture,
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if (!device->stream) {
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if (!device->stream) {
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close_audio_device(device);
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close_audio_device(device);
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SDL_UnlockMutex(current_audio.detectionLock);
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return 0;
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return 0;
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}
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}
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}
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}
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@ -1485,7 +1468,6 @@ static SDL_AudioDeviceID open_audio_device(const char *devname, int iscapture,
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device->buffer_queue = SDL_NewDataQueue(SDL_AUDIOBUFFERQUEUE_PACKETLEN, obtained->size * 2);
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device->buffer_queue = SDL_NewDataQueue(SDL_AUDIOBUFFERQUEUE_PACKETLEN, obtained->size * 2);
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if (!device->buffer_queue) {
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if (!device->buffer_queue) {
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close_audio_device(device);
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close_audio_device(device);
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SDL_UnlockMutex(current_audio.detectionLock);
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SDL_SetError("Couldn't create audio buffer queue");
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SDL_SetError("Couldn't create audio buffer queue");
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return 0;
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return 0;
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}
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}
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@ -1503,12 +1485,28 @@ static SDL_AudioDeviceID open_audio_device(const char *devname, int iscapture,
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device->work_buffer = (Uint8 *)SDL_malloc(device->work_buffer_len);
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device->work_buffer = (Uint8 *)SDL_malloc(device->work_buffer_len);
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if (device->work_buffer == NULL) {
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if (device->work_buffer == NULL) {
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close_audio_device(device);
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close_audio_device(device);
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SDL_UnlockMutex(current_audio.detectionLock);
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SDL_OutOfMemory();
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SDL_OutOfMemory();
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return 0;
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return 0;
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}
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}
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/* Find an available device ID... */
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SDL_LockMutex(current_audio.detectionLock);
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for (id = min_id - 1; id < SDL_arraysize(open_devices); id++) {
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if (open_devices[id] == NULL) {
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break;
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}
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}
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if (id == SDL_arraysize(open_devices)) {
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close_audio_device(device);
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SDL_SetError("Too many open audio devices");
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SDL_UnlockMutex(current_audio.detectionLock);
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return 0;
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}
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device->id = id + 1;
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open_devices[id] = device; /* add it to our list of open devices. */
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open_devices[id] = device; /* add it to our list of open devices. */
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SDL_UnlockMutex(current_audio.detectionLock);
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/* Start the audio thread if necessary */
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/* Start the audio thread if necessary */
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if (!current_audio.impl.ProvidesOwnCallbackThread) {
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if (!current_audio.impl.ProvidesOwnCallbackThread) {
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@ -1521,7 +1519,6 @@ static SDL_AudioDeviceID open_audio_device(const char *devname, int iscapture,
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if (!startup_data.startup_semaphore) {
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if (!startup_data.startup_semaphore) {
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close_audio_device(device);
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close_audio_device(device);
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SDL_SetError("Couldn't create audio thread startup semaphore");
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SDL_SetError("Couldn't create audio thread startup semaphore");
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SDL_UnlockMutex(current_audio.detectionLock);
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return 0;
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return 0;
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}
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}
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@ -1532,14 +1529,12 @@ static SDL_AudioDeviceID open_audio_device(const char *devname, int iscapture,
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SDL_DestroySemaphore(startup_data.startup_semaphore);
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SDL_DestroySemaphore(startup_data.startup_semaphore);
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close_audio_device(device);
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close_audio_device(device);
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SDL_SetError("Couldn't create audio thread");
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SDL_SetError("Couldn't create audio thread");
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SDL_UnlockMutex(current_audio.detectionLock);
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return 0;
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return 0;
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}
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}
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SDL_SemWait(startup_data.startup_semaphore);
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SDL_SemWait(startup_data.startup_semaphore);
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SDL_DestroySemaphore(startup_data.startup_semaphore);
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SDL_DestroySemaphore(startup_data.startup_semaphore);
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}
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}
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SDL_UnlockMutex(current_audio.detectionLock);
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return device->id;
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return device->id;
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}
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}
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