如何获取物理设备支持的音频格式(WinAPI,Windows)
How to get Audio Formats supported by physical device (WinAPI, Windows)
我有一个音频设备(一个 USB 麦克风),我想知道它原生支持哪些音频格式(位深度和采样率),在 OS X 上有一个不错的 kAudioStreamPropertyAvailablePhysicalFormats Core Audio 属性,但我在 Windows.
上找不到类似的东西
我知道有这个问题Windows Core Audio Api get all supported formats on capture device但是
答案很糟糕...而且我不受 windows 核心音频 API 的限制,我需要任何方法。
Windows 本身以某种方式知道它,因此很可能应该有一种方法,例如通过 IOCTL、DirectShow 或 WMI 或其他方式。
可能有一种方法可以监视 Windows 以找出它使用什么来枚举格式,但我不知道该怎么做。
Hokay,这里有一些示例代码供您使用。信息就在那里,散布在网络上,但你必须搜索它。 Google 我在下面调用的函数和一些奇怪的清单常量以了解更多信息。用记事本编写的代码可能无法编译。
下面的代码查询默认的输入/输出设备。要获取任何特定系统上安装的所有设备的 device_id,请调用 waveInGetNumDevs
或 waveOutGetNumDevs
并从 0 开始计数。
#define INITGUID
#include "Ks.h"
#include "KsMedia.h"
#include "mmdeviceapi.h"
// Open a query handle for the default input or output device
// Call Closehandle when done.
static HANDLE QueryOpen (bool input)
{
DWORD device_id, device_status;
DWORD err = (input) ?
waveInMessage ((HWAVEIN) (INT_PTR) WAVE_MAPPER,
DRVM_MAPPER_PREFERRED_GET, (DWORD_PTR) &device_id, (DWORD_PTR) &device_status) :
waveOutMessage ((HWAVEOUT) (INT_PTR) WAVE_MAPPER,
DRVM_MAPPER_PREFERRED_GET, (DWORD_PTR) &device_id, (DWORD_PTR) &device_status);
if (err)
return INVALID_HANDLE_VALUE;
DWORD devicePathSize;
DWORD mm_result = (input) ?
waveInMessage ((HWAVEIN) (INT_PTR) device_id, DRV_QUERYDEVICEINTERFACESIZE,
(DWORD_PTR) &devicePathSize, 0) :
waveOutMessage ((HWAVEOUT) (INT_PTR) device_id, DRV_QUERYDEVICEINTERFACESIZE,
(DWORD_PTR) &devicePathSize, 0);
if (mm_result != 0)
return INVALID_HANDLE_VALUE;
/* apparently DRV_QUERYDEVICEINTERFACE returns a unicode interface path, although this is undocumented */
WCHAR *devicePath = (WCHAR *) malloc (devicePathSize);
mm_result = (input) ?
waveInMessage ((HWAVEIN) (INT_PTR) device_id, DRV_QUERYDEVICEINTERFACE,
(DWORD_PTR) devicePath, devicePathSize) :
waveOutMessage ((HWAVEOUT) (INT_PTR) device_id, DRV_QUERYDEVICEINTERFACE,
(DWORD_PTR) devicePath, devicePathSize);
HANDLE result = (mm_result == 0) ? CreateFileW (devicePath, FILE_SHARE_READ | FILE_SHARE_WRITE,
0, NULL, OPEN_EXISTING, 0, NULL) : INVALID_HANDLE_VALUE;
free (devicePath);
return result;
}
// Interrogate the default input / output device (demo code)
void InterrogateDefaultDevice (bool input)
{
HANDLE hQuery = QueryOpen (input);
if (hQuery == INVALID_HANDLE_VALUE)
return;
int pin_count = GetKSFilterPinCount (hQuery);
for (int pinId = 0; pinId < pin_count; ++pinId)
{
KSPIN_COMMUNICATION communication = GetKSFilterPinPropertyCommunication (hQuery, pinId);
KSPIN_DATAFLOW dataflow = GetKSFilterPinPropertyDataflow (h, pinId);
if ((communication == KSPIN_COMMUNICATION_SINK || communication == KSPIN_COMMUNICATION_BOTH) &&
(KSFilterPinPropertyIdentifiersInclude (hQuery, pinId, KSPROPERTY_PIN_INTERFACES,
&KSINTERFACESETID_Standard, KSINTERFACE_STANDARD_STREAMING) ||
KSFilterPinPropertyIdentifiersInclude (hQuery, pinId, KSPROPERTY_PIN_INTERFACES,
&KSINTERFACESETID_Standard, KSINTERFACE_STANDARD_LOOPED_STREAMING)) &&
KSFilterPinPropertyIdentifiersInclude (hQuery, pinId, KSPROPERTY_PIN_MEDIUMS,
&KSMEDIUMSETID_Standard, KSMEDIUM_STANDARD_DEVIO))
{
KSMULTIPLE_ITEM *item = NULL;
if (WdmGetPinPropertyMulti (hQuery, pinId, KSPROPERTY_PIN_DATARANGES, &item))
{
KSDATARANGE_AUDIO *dr = (KSDATARANGE_AUDIO *) (item + 1);
for (ULONG i = 0; i < item->Count; ++i )
{
printf ("%ul - %ul Hz (%ul - %ul bits per sample, upto %ul channels)\n",
dr->MinimumSampleFrequency, dr->MaximumSampleFrequency,
dr->MinimumBitsPerSample, dr->MaximumBitsPerSample, dr->MaximumChannels);
dr = (KSDATARANGE_AUDIO *) ((BYTE *) dr + dr->DataRange.FormatSize);
}
free (item);
}
}
}
CloseHandle (hQuery);
}
我有一个音频设备(一个 USB 麦克风),我想知道它原生支持哪些音频格式(位深度和采样率),在 OS X 上有一个不错的 kAudioStreamPropertyAvailablePhysicalFormats Core Audio 属性,但我在 Windows.
上找不到类似的东西我知道有这个问题Windows Core Audio Api get all supported formats on capture device但是
答案很糟糕...而且我不受 windows 核心音频 API 的限制,我需要任何方法。
Windows 本身以某种方式知道它,因此很可能应该有一种方法,例如通过 IOCTL、DirectShow 或 WMI 或其他方式。
可能有一种方法可以监视 Windows 以找出它使用什么来枚举格式,但我不知道该怎么做。
Hokay,这里有一些示例代码供您使用。信息就在那里,散布在网络上,但你必须搜索它。 Google 我在下面调用的函数和一些奇怪的清单常量以了解更多信息。用记事本编写的代码可能无法编译。
下面的代码查询默认的输入/输出设备。要获取任何特定系统上安装的所有设备的 device_id,请调用 waveInGetNumDevs
或 waveOutGetNumDevs
并从 0 开始计数。
#define INITGUID
#include "Ks.h"
#include "KsMedia.h"
#include "mmdeviceapi.h"
// Open a query handle for the default input or output device
// Call Closehandle when done.
static HANDLE QueryOpen (bool input)
{
DWORD device_id, device_status;
DWORD err = (input) ?
waveInMessage ((HWAVEIN) (INT_PTR) WAVE_MAPPER,
DRVM_MAPPER_PREFERRED_GET, (DWORD_PTR) &device_id, (DWORD_PTR) &device_status) :
waveOutMessage ((HWAVEOUT) (INT_PTR) WAVE_MAPPER,
DRVM_MAPPER_PREFERRED_GET, (DWORD_PTR) &device_id, (DWORD_PTR) &device_status);
if (err)
return INVALID_HANDLE_VALUE;
DWORD devicePathSize;
DWORD mm_result = (input) ?
waveInMessage ((HWAVEIN) (INT_PTR) device_id, DRV_QUERYDEVICEINTERFACESIZE,
(DWORD_PTR) &devicePathSize, 0) :
waveOutMessage ((HWAVEOUT) (INT_PTR) device_id, DRV_QUERYDEVICEINTERFACESIZE,
(DWORD_PTR) &devicePathSize, 0);
if (mm_result != 0)
return INVALID_HANDLE_VALUE;
/* apparently DRV_QUERYDEVICEINTERFACE returns a unicode interface path, although this is undocumented */
WCHAR *devicePath = (WCHAR *) malloc (devicePathSize);
mm_result = (input) ?
waveInMessage ((HWAVEIN) (INT_PTR) device_id, DRV_QUERYDEVICEINTERFACE,
(DWORD_PTR) devicePath, devicePathSize) :
waveOutMessage ((HWAVEOUT) (INT_PTR) device_id, DRV_QUERYDEVICEINTERFACE,
(DWORD_PTR) devicePath, devicePathSize);
HANDLE result = (mm_result == 0) ? CreateFileW (devicePath, FILE_SHARE_READ | FILE_SHARE_WRITE,
0, NULL, OPEN_EXISTING, 0, NULL) : INVALID_HANDLE_VALUE;
free (devicePath);
return result;
}
// Interrogate the default input / output device (demo code)
void InterrogateDefaultDevice (bool input)
{
HANDLE hQuery = QueryOpen (input);
if (hQuery == INVALID_HANDLE_VALUE)
return;
int pin_count = GetKSFilterPinCount (hQuery);
for (int pinId = 0; pinId < pin_count; ++pinId)
{
KSPIN_COMMUNICATION communication = GetKSFilterPinPropertyCommunication (hQuery, pinId);
KSPIN_DATAFLOW dataflow = GetKSFilterPinPropertyDataflow (h, pinId);
if ((communication == KSPIN_COMMUNICATION_SINK || communication == KSPIN_COMMUNICATION_BOTH) &&
(KSFilterPinPropertyIdentifiersInclude (hQuery, pinId, KSPROPERTY_PIN_INTERFACES,
&KSINTERFACESETID_Standard, KSINTERFACE_STANDARD_STREAMING) ||
KSFilterPinPropertyIdentifiersInclude (hQuery, pinId, KSPROPERTY_PIN_INTERFACES,
&KSINTERFACESETID_Standard, KSINTERFACE_STANDARD_LOOPED_STREAMING)) &&
KSFilterPinPropertyIdentifiersInclude (hQuery, pinId, KSPROPERTY_PIN_MEDIUMS,
&KSMEDIUMSETID_Standard, KSMEDIUM_STANDARD_DEVIO))
{
KSMULTIPLE_ITEM *item = NULL;
if (WdmGetPinPropertyMulti (hQuery, pinId, KSPROPERTY_PIN_DATARANGES, &item))
{
KSDATARANGE_AUDIO *dr = (KSDATARANGE_AUDIO *) (item + 1);
for (ULONG i = 0; i < item->Count; ++i )
{
printf ("%ul - %ul Hz (%ul - %ul bits per sample, upto %ul channels)\n",
dr->MinimumSampleFrequency, dr->MaximumSampleFrequency,
dr->MinimumBitsPerSample, dr->MaximumBitsPerSample, dr->MaximumChannels);
dr = (KSDATARANGE_AUDIO *) ((BYTE *) dr + dr->DataRange.FormatSize);
}
free (item);
}
}
}
CloseHandle (hQuery);
}