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Fix subtle errors with device enumeration on most backends.

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This commit is contained in:
David Reid
2017-11-11 18:02:05 +10:00
parent 5c7bb0dc98
commit 375cdd68df
1 changed files with 72 additions and 55 deletions
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mini_al.h
+72 -55
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@@ -4446,34 +4446,42 @@ static mal_result mal_enumerate_devices__winmm(mal_context* pContext, mal_device
if (type == mal_device_type_playback) {
UINT deviceCount = ((MAL_PFN_waveOutGetNumDevs)pContext->winmm.waveOutGetNumDevs)();
for (UINT iDevice = 0; iDevice < deviceCount; ++iDevice) {
if (pInfo != NULL && *pCount < infoSize) {
mal_uint32 iInfo = *pCount;
if (pInfo != NULL) {
if (infoSize > 0) {
WAVEOUTCAPSA caps;
MMRESULT result = ((MAL_PFN_waveOutGetDevCapsA)pContext->winmm.waveOutGetDevCapsA)(iDevice, &caps, sizeof(caps));
if (result == MMSYSERR_NOERROR) {
pInfo->id.winmm = iDevice;
mal_strncpy_s(pInfo->name, sizeof(pInfo->name), caps.szPname, (size_t)-1);
}
WAVEOUTCAPSA caps;
MMRESULT result = ((MAL_PFN_waveOutGetDevCapsA)pContext->winmm.waveOutGetDevCapsA)(iDevice, &caps, sizeof(caps));
if (result == MMSYSERR_NOERROR) {
pInfo[iInfo].id.winmm = iDevice;
mal_strncpy_s(pInfo[iInfo].name, sizeof(pInfo[iInfo].name), caps.szPname, (size_t)-1);
pInfo += 1;
infoSize -= 1;
*pCount += 1;
}
} else {
*pCount += 1;
}
*pCount += 1;
}
} else {
UINT deviceCount = ((MAL_PFN_waveInGetNumDevs)pContext->winmm.waveInGetNumDevs)();
for (UINT iDevice = 0; iDevice < deviceCount; ++iDevice) {
if (pInfo != NULL && *pCount < infoSize) {
mal_uint32 iInfo = *pCount;
if (pInfo != NULL) {
if (infoSize > 0) {
WAVEINCAPSA caps;
MMRESULT result = ((MAL_PFN_waveInGetDevCapsA)pContext->winmm.waveInGetDevCapsA)(iDevice, &caps, sizeof(caps));
if (result == MMSYSERR_NOERROR) {
pInfo->id.winmm = iDevice;
mal_strncpy_s(pInfo->name, sizeof(pInfo->name), caps.szPname, (size_t)-1);
}
WAVEINCAPSA caps;
MMRESULT result = ((MAL_PFN_waveInGetDevCapsA)pContext->winmm.waveInGetDevCapsA)(iDevice, &caps, sizeof(caps));
if (result == MMSYSERR_NOERROR) {
pInfo[iInfo].id.winmm = iDevice;
mal_strncpy_s(pInfo[iInfo].name, sizeof(pInfo[iInfo].name), caps.szPname, (size_t)-1);
pInfo += 1;
infoSize -= 1;
*pCount += 1;
}
} else {
*pCount += 1;
}
*pCount += 1;
}
}
@@ -5704,7 +5712,7 @@ static mal_result mal_enumerate_devices__alsa(mal_context* pContext, mal_device_
// device type and sharing mode.
char* dst = hwid;
char* src = hwid+2;
while (*dst++ = *src++);
while ((*dst++ = *src++));
} else {
// Conversion to "hw:%d,%d" failed. Just use the name as-is.
mal_strncpy_s(hwid, sizeof(hwid), NAME, (size_t)-1);
@@ -6286,37 +6294,46 @@ static mal_result mal_enumerate_devices__oss(mal_context* pContext, mal_device_t
if (includeThisDevice) {
if (ai.devnode[0] != '\0') { // <-- Can be blank, according to documentation.
if (pInfo != NULL && *pCount < infoSize) {
mal_uint32 iInfo = *pCount;
mal_strncpy_s(pInfo[iInfo].id.oss, sizeof(pInfo[iInfo].id.oss), ai.devnode, (size_t)-1);
if (pInfo != NULL) {
if (infoSize > 0) {
mal_strncpy_s(pInfo->id.oss, sizeof(pInfo->id.oss), ai.devnode, (size_t)-1);
// The human readable device name should be in the "ai.handle" variable, but it can
// sometimes be empty in which case we just fall back to "ai.name" which is less user
// friendly, but usually has a value.
if (ai.handle[0] != '\0') {
mal_strncpy_s(pInfo[iInfo].name, sizeof(pInfo[iInfo].name), ai.handle, (size_t)-1);
} else {
mal_strncpy_s(pInfo[iInfo].name, sizeof(pInfo[iInfo].name), ai.name, (size_t)-1);
}
}
// The human readable device name should be in the "ai.handle" variable, but it can
// sometimes be empty in which case we just fall back to "ai.name" which is less user
// friendly, but usually has a value.
if (ai.handle[0] != '\0') {
mal_strncpy_s(pInfo->name, sizeof(pInfo->name), ai.handle, (size_t)-1);
} else {
mal_strncpy_s(pInfo->name, sizeof(pInfo->name), ai.name, (size_t)-1);
}
*pCount += 1;
pInfo += 1;
infoSize -= 1;
*pCount += 1;
}
} else {
*pCount += 1;
}
}
}
}
}
} else {
// Failed to retrieve the system information. Just return a default device for both playback and capture.
if (pInfo != NULL && infoSize >= 1) {
mal_strncpy_s(pInfo[0].id.oss, sizeof(pInfo[0].id.oss), "/dev/dsp", (size_t)-1);
if (type == mal_device_type_playback) {
mal_strncpy_s(pInfo[0].name, sizeof(pInfo[0].name), "Default Playback Device", (size_t)-1);
} else {
mal_strncpy_s(pInfo[0].name, sizeof(pInfo[0].name), "Default Capture Device", (size_t)-1);
}
}
if (pInfo != NULL) {
if (infoSize > 0) {
mal_strncpy_s(pInfo[0].id.oss, sizeof(pInfo[0].id.oss), "/dev/dsp", (size_t)-1);
if (type == mal_device_type_playback) {
mal_strncpy_s(pInfo[0].name, sizeof(pInfo[0].name), "Default Playback Device", (size_t)-1);
} else {
mal_strncpy_s(pInfo[0].name, sizeof(pInfo[0].name), "Default Capture Device", (size_t)-1);
}
*pCount = 1;
*pCount = 1;
}
} else {
*pCount = 1;
}
}
close(fd);
@@ -7533,7 +7550,7 @@ mal_result mal_context_uninit__openal(mal_context* pContext)
mal_result mal_enumerate_devices__openal(mal_context* pContext, mal_device_type type, mal_uint32* pCount, mal_device_info* pInfo)
{
mal_uint32 infoCapacity = *pCount;
mal_uint32 infoSize = *pCount;
*pCount = 0;
const mal_ALCchar* pDeviceNames = ((MAL_LPALCGETSTRING)pContext->openal.alcGetString)(NULL, (type == mal_device_type_playback) ? MAL_ALC_DEVICE_SPECIFIER : MAL_ALC_CAPTURE_DEVICE_SPECIFIER);
@@ -7543,15 +7560,18 @@ mal_result mal_enumerate_devices__openal(mal_context* pContext, mal_device_type
// Each device is stored in pDeviceNames, separated by a null-terminator. The string itself is double-null-terminated.
const mal_ALCchar* pNextDeviceName = pDeviceNames;
for (;;) {
*pCount += 1;
while (pNextDeviceName[0] != '\0') {
if (pInfo != NULL) {
if (infoSize > 0) {
mal_strncpy_s(pInfo->id.openal, sizeof(pInfo->id.openal), (const char*)pNextDeviceName, (size_t)-1);
mal_strncpy_s(pInfo->name, sizeof(pInfo->name), (const char*)pNextDeviceName, (size_t)-1);
if (pInfo != NULL && infoCapacity > 0) {
mal_strncpy_s(pInfo->id.openal, sizeof(pInfo->id.openal), (const char*)pNextDeviceName, (size_t)-1);
mal_strncpy_s(pInfo->name, sizeof(pInfo->name), (const char*)pNextDeviceName, (size_t)-1);
pInfo += 1;
infoCapacity -= 1;
pInfo += 1;
infoSize -= 1;
*pCount += 1;
}
} else {
*pCount += 1;
}
// Move to the next device name.
@@ -7559,11 +7579,8 @@ mal_result mal_enumerate_devices__openal(mal_context* pContext, mal_device_type
pNextDeviceName += 1;
}
// If we've reached the double-null-terminator, we're done.
// Skip past the null terminator.
pNextDeviceName += 1;
if (*pNextDeviceName == '\0') {
break;
}
};
return MAL_SUCCESS;
@@ -10228,7 +10245,7 @@ void mal_pcm_f32_to_s32(int* pOut, const float* pIn, unsigned int count)
// which is by design.
// - ALSA: Add support for excluding the "null" device using the alsa.excludeNullDevice context config variable.
// - ALSA: Fix a bug with channel mapping which causes an assertion to fail.
// - WASAPI: Fix device enumeration when passing NULL to the pInfo parameter.
// - Fix errors with enumeration when pInfo is set to NULL.
//
// v0.4 - 2017-11-05
// - API CHANGE: The log callback is now per-context rather than per-device and as is thus now passed to