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Fix a context initialization bug.

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This commit is contained in:
David Reid
2020-11-10 19:21:11 +10:00
parent 35fd4fbf66
commit 06ac6b8565
1 changed files with 52 additions and 34 deletions
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miniaudio.h
+52 -34
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@@ -1,6 +1,6 @@
/*
Audio playback and capture library. Choice of public domain or MIT-0. See license statements at the end of this file.
miniaudio - v0.10.23 - 2020-11-09
miniaudio - v0.10.24 - TBD
David Reid - mackron@gmail.com
@@ -1447,7 +1447,7 @@ extern "C" {
#define MA_VERSION_MAJOR 0
#define MA_VERSION_MINOR 10
#define MA_VERSION_REVISION 23
#define MA_VERSION_REVISION 24
#define MA_VERSION_STRING MA_XSTRINGIFY(MA_VERSION_MAJOR) "." MA_XSTRINGIFY(MA_VERSION_MINOR) "." MA_XSTRINGIFY(MA_VERSION_REVISION)
#if defined(_MSC_VER) && !defined(__clang__)
@@ -22470,17 +22470,6 @@ static ma_result ma_context_init__pulse(const ma_context_config* pConfig, ma_con
pContext->pulse.pa_stream_readable_size = (ma_proc)_pa_stream_readable_size;
#endif
pContext->isBackendAsynchronous = MA_TRUE; /* We are using PulseAudio in asynchronous mode. */
pContext->onUninit = ma_context_uninit__pulse;
pContext->onEnumDevices = ma_context_enumerate_devices__pulse;
pContext->onGetDeviceInfo = ma_context_get_device_info__pulse;
pContext->onDeviceInit = ma_device_init__pulse;
pContext->onDeviceUninit = ma_device_uninit__pulse;
pContext->onDeviceStart = ma_device_start__pulse;
pContext->onDeviceStop = ma_device_stop__pulse;
pContext->onDeviceMainLoop = NULL; /* Set to null since this backend is asynchronous. */
/* The PulseAudio context maps well to miniaudio's notion of a context. The pa_context object will be initialized as part of the ma_context. */
pContext->pulse.pMainLoop = ((ma_pa_threaded_mainloop_new_proc)pContext->pulse.pa_threaded_mainloop_new)();
if (pContext->pulse.pMainLoop == NULL) {
@@ -22534,6 +22523,17 @@ static ma_result ma_context_init__pulse(const ma_context_config* pConfig, ma_con
return result;
}
pContext->isBackendAsynchronous = MA_TRUE; /* We are using PulseAudio in asynchronous mode. */
pContext->onUninit = ma_context_uninit__pulse;
pContext->onEnumDevices = ma_context_enumerate_devices__pulse;
pContext->onGetDeviceInfo = ma_context_get_device_info__pulse;
pContext->onDeviceInit = ma_device_init__pulse;
pContext->onDeviceUninit = ma_device_uninit__pulse;
pContext->onDeviceStart = ma_device_start__pulse;
pContext->onDeviceStop = ma_device_stop__pulse;
pContext->onDeviceMainLoop = NULL; /* Set to null since this backend is asynchronous. */
return MA_SUCCESS;
}
#endif
@@ -23168,16 +23168,6 @@ static ma_result ma_context_init__jack(const ma_context_config* pConfig, ma_cont
pContext->jack.jack_free = (ma_proc)_jack_free;
#endif
pContext->isBackendAsynchronous = MA_TRUE;
pContext->onUninit = ma_context_uninit__jack;
pContext->onEnumDevices = ma_context_enumerate_devices__jack;
pContext->onGetDeviceInfo = ma_context_get_device_info__jack;
pContext->onDeviceInit = ma_device_init__jack;
pContext->onDeviceUninit = ma_device_uninit__jack;
pContext->onDeviceStart = ma_device_start__jack;
pContext->onDeviceStop = ma_device_stop__jack;
if (pConfig->jack.pClientName != NULL) {
pContext->jack.pClientName = ma_copy_string(pConfig->jack.pClientName, &pContext->allocationCallbacks);
}
@@ -23201,6 +23191,16 @@ static ma_result ma_context_init__jack(const ma_context_config* pConfig, ma_cont
((ma_jack_client_close_proc)pContext->jack.jack_client_close)((ma_jack_client_t*)pDummyClient);
}
pContext->isBackendAsynchronous = MA_TRUE;
pContext->onUninit = ma_context_uninit__jack;
pContext->onEnumDevices = ma_context_enumerate_devices__jack;
pContext->onGetDeviceInfo = ma_context_get_device_info__jack;
pContext->onDeviceInit = ma_device_init__jack;
pContext->onDeviceUninit = ma_device_uninit__jack;
pContext->onDeviceStart = ma_device_start__jack;
pContext->onDeviceStop = ma_device_stop__jack;
return MA_SUCCESS;
}
#endif /* JACK */
@@ -26286,16 +26286,6 @@ static ma_result ma_context_init__coreaudio(const ma_context_config* pConfig, ma
pContext->coreaudio.AudioUnitRender = (ma_proc)AudioUnitRender;
#endif
pContext->isBackendAsynchronous = MA_TRUE;
pContext->onUninit = ma_context_uninit__coreaudio;
pContext->onEnumDevices = ma_context_enumerate_devices__coreaudio;
pContext->onGetDeviceInfo = ma_context_get_device_info__coreaudio;
pContext->onDeviceInit = ma_device_init__coreaudio;
pContext->onDeviceUninit = ma_device_uninit__coreaudio;
pContext->onDeviceStart = ma_device_start__coreaudio;
pContext->onDeviceStop = ma_device_stop__coreaudio;
/* Audio component. */
{
AudioComponentDescription desc;
@@ -26334,6 +26324,16 @@ static ma_result ma_context_init__coreaudio(const ma_context_config* pConfig, ma
pContext->coreaudio.noAudioSessionDeactivate = pConfig->coreaudio.noAudioSessionDeactivate;
pContext->isBackendAsynchronous = MA_TRUE;
pContext->onUninit = ma_context_uninit__coreaudio;
pContext->onEnumDevices = ma_context_enumerate_devices__coreaudio;
pContext->onGetDeviceInfo = ma_context_get_device_info__coreaudio;
pContext->onDeviceInit = ma_device_init__coreaudio;
pContext->onDeviceUninit = ma_device_uninit__coreaudio;
pContext->onDeviceStart = ma_device_start__coreaudio;
pContext->onDeviceStop = ma_device_stop__coreaudio;
return MA_SUCCESS;
}
#endif /* Core Audio */
@@ -29009,6 +29009,9 @@ static ma_result ma_context_init__oss(const ma_context_config* pConfig, ma_conte
return ma_context_post_error(pContext, NULL, MA_LOG_LEVEL_ERROR, "[OSS] Failed to retrieve OSS version.", MA_NO_BACKEND);
}
/* The file handle to temp device is no longer needed. Close ASAP. */
close(fd);
pContext->oss.versionMajor = ((ossVersion & 0xFF0000) >> 16);
pContext->oss.versionMinor = ((ossVersion & 0x00FF00) >> 8);
@@ -29021,7 +29024,6 @@ static ma_result ma_context_init__oss(const ma_context_config* pConfig, ma_conte
pContext->onDeviceStop = NULL; /* Not required for synchronous backends. */
pContext->onDeviceMainLoop = ma_device_main_loop__oss;
close(fd);
return MA_SUCCESS;
}
#endif /* OSS */
@@ -32059,6 +32061,18 @@ MA_API ma_result ma_context_init(const ma_backend backends[], ma_uint32 backendC
for (iBackend = 0; iBackend < backendsToIterateCount; ++iBackend) {
ma_backend backend = pBackendsToIterate[iBackend];
/*
I've had a subtle bug where some state is set by the backend's ma_context_init__*() function, but then later failed because
a setting in the context that was set in the prior failed attempt was left unchanged in the next attempt which resulted in
inconsistent state. Specifically what happened was the PulseAudio backend set the pContext->isBackendAsynchronous flag to true,
but since ALSA is not an asynchronous backend (it's a blocking read-write backend) it just left it unmodified with the assumption
that it would be initialized to false. This assumption proved to be incorrect because of the fact that the PulseAudio backend set
it earlier. For safety I'm going to reset this flag for each iteration.
TODO: Remove this comment when the isBackendAsynchronous flag is removed.
*/
pContext->isBackendAsynchronous = MA_FALSE;
result = MA_NO_BACKEND;
switch (backend) {
#ifdef MA_HAS_WASAPI
@@ -63725,6 +63739,10 @@ The following miscellaneous changes have also been made.
/*
REVISION HISTORY
================
v0.10.24 - TBD
- Fix a bug where initialization of a backend can fail due to some bad state being set from a prior failed attempt at initializing a
lower priority backend.
v0.10.23 - 2020-11-09
- AAudio: Add support for configuring a playback stream's usage.
- Fix a compilation error when all built-in asynchronous backends are disabled at compile time.