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audio: Allow audio streams to be created when the subsystem isn't initialized. 

You are on your own to destroy them, though!
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Ryan C. Gordon 2023-10-11 22:42:52 -04:00
parent 1ae33f6751
commit 2bca4671a6
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GPG Key ID: FA148B892AB48044
1 changed files with 29 additions and 22 deletions
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51
src/audio/SDL_audio.c
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@ -139,40 +139,47 @@ static int GetDefaultSampleFramesFromFreq(const int freq)
void OnAudioStreamCreated(SDL_AudioStream *stream) void OnAudioStreamCreated(SDL_AudioStream *stream)
{ {
SDL_assert(SDL_GetCurrentAudioDriver() != NULL);
SDL_assert(stream != NULL); SDL_assert(stream != NULL);
// this isn't really part of the "device list" but it's a convenient lock to use here. // NOTE that you can create an audio stream without initializing the audio subsystem,
SDL_LockRWLockForWriting(current_audio.device_list_lock); // but it will not be automatically destroyed during a later call to SDL_Quit!
if (current_audio.existing_streams) { // You must explicitly destroy it yourself!
current_audio.existing_streams->prev = stream; if (current_audio.device_list_lock) {
// this isn't really part of the "device list" but it's a convenient lock to use here.
SDL_LockRWLockForWriting(current_audio.device_list_lock);
if (current_audio.existing_streams) {
current_audio.existing_streams->prev = stream;
}
stream->prev = NULL;
stream->next = current_audio.existing_streams;
current_audio.existing_streams = stream;
SDL_UnlockRWLock(current_audio.device_list_lock);
} }
stream->prev = NULL;
stream->next = current_audio.existing_streams;
current_audio.existing_streams = stream;
SDL_UnlockRWLock(current_audio.device_list_lock);
} }
void OnAudioStreamDestroy(SDL_AudioStream *stream) void OnAudioStreamDestroy(SDL_AudioStream *stream)
{ {
SDL_assert(SDL_GetCurrentAudioDriver() != NULL);
SDL_assert(stream != NULL); SDL_assert(stream != NULL);
// this isn't really part of the "device list" but it's a convenient lock to use here. // NOTE that you can create an audio stream without initializing the audio subsystem,
SDL_LockRWLockForWriting(current_audio.device_list_lock); // but it will not be automatically destroyed during a later call to SDL_Quit!
if (stream->prev) { // You must explicitly destroy it yourself!
stream->prev->next = stream->next; if (current_audio.device_list_lock) {
// this isn't really part of the "device list" but it's a convenient lock to use here.
SDL_LockRWLockForWriting(current_audio.device_list_lock);
if (stream->prev) {
stream->prev->next = stream->next;
}
if (stream->next) {
stream->next->prev = stream->prev;
}
if (stream == current_audio.existing_streams) {
current_audio.existing_streams = stream->next;
}
SDL_UnlockRWLock(current_audio.device_list_lock);
} }
if (stream->next) {
stream->next->prev = stream->prev;
}
if (stream == current_audio.existing_streams) {
current_audio.existing_streams = stream->next;
}
SDL_UnlockRWLock(current_audio.device_list_lock);
} }
// device should be locked when calling this. // device should be locked when calling this.
static SDL_bool AudioDeviceCanUseSimpleCopy(SDL_AudioDevice *device) static SDL_bool AudioDeviceCanUseSimpleCopy(SDL_AudioDevice *device)
{ {