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-rw-r--r--sys/wasapi/gstwasapiutil.c261
1 files changed, 261 insertions, 0 deletions
diff --git a/sys/wasapi/gstwasapiutil.c b/sys/wasapi/gstwasapiutil.c
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--- /dev/null
+++ b/sys/wasapi/gstwasapiutil.c
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+/*
+ * Copyright (C) 2008 Ole André Vadla Ravnås <ole.andre.ravnas@tandberg.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "gstwasapiutil.h"
+
+#include <mmdeviceapi.h>
+
+/* These seem to be missing in the Windows SDK... */
+const CLSID CLSID_MMDeviceEnumerator = { 0xbcde0395, 0xe52f, 0x467c,
+ {0x8e, 0x3d, 0xc4, 0x57, 0x92, 0x91, 0x69, 0x2e}
+};
+const IID IID_IMMDeviceEnumerator = { 0xa95664d2, 0x9614, 0x4f35,
+ {0xa7, 0x46, 0xde, 0x8d, 0xb6, 0x36, 0x17, 0xe6}
+};
+const IID IID_IAudioClient = { 0x1cb9ad4c, 0xdbfa, 0x4c32,
+ {0xb1, 0x78, 0xc2, 0xf5, 0x68, 0xa7, 0x03, 0xb2}
+};
+const IID IID_IAudioClock = { 0xcd63314f, 0x3fba, 0x4a1b,
+ {0x81, 0x2c, 0xef, 0x96, 0x35, 0x87, 0x28, 0xe7}
+};
+const IID IID_IAudioCaptureClient = { 0xc8adbd64, 0xe71e, 0x48a0,
+ {0xa4, 0xde, 0x18, 0x5c, 0x39, 0x5c, 0xd3, 0x17}
+};
+const IID IID_IAudioRenderClient = { 0xf294acfc, 0x3146, 0x4483,
+ {0xa7, 0xbf, 0xad, 0xdc, 0xa7, 0xc2, 0x60, 0xe2}
+};
+
+const gchar *
+gst_wasapi_util_hresult_to_string (HRESULT hr)
+{
+ const gchar *s = "AUDCLNT_E_UNKNOWN";
+
+ switch (hr) {
+ case AUDCLNT_E_NOT_INITIALIZED:
+ s = "AUDCLNT_E_NOT_INITIALIZED";
+ break;
+ case AUDCLNT_E_ALREADY_INITIALIZED:
+ s = "AUDCLNT_E_ALREADY_INITIALIZED";
+ break;
+ case AUDCLNT_E_WRONG_ENDPOINT_TYPE:
+ s = "AUDCLNT_E_WRONG_ENDPOINT_TYPE";
+ break;
+ case AUDCLNT_E_DEVICE_INVALIDATED:
+ s = "AUDCLNT_E_DEVICE_INVALIDATED";
+ break;
+ case AUDCLNT_E_NOT_STOPPED:
+ s = "AUDCLNT_E_NOT_STOPPED";
+ break;
+ case AUDCLNT_E_BUFFER_TOO_LARGE:
+ s = "AUDCLNT_E_BUFFER_TOO_LARGE";
+ break;
+ case AUDCLNT_E_OUT_OF_ORDER:
+ s = "AUDCLNT_E_OUT_OF_ORDER";
+ break;
+ case AUDCLNT_E_UNSUPPORTED_FORMAT:
+ s = "AUDCLNT_E_UNSUPPORTED_FORMAT";
+ break;
+ case AUDCLNT_E_INVALID_SIZE:
+ s = "AUDCLNT_E_INVALID_SIZE";
+ break;
+ case AUDCLNT_E_DEVICE_IN_USE:
+ s = "AUDCLNT_E_DEVICE_IN_USE";
+ break;
+ case AUDCLNT_E_BUFFER_OPERATION_PENDING:
+ s = "AUDCLNT_E_BUFFER_OPERATION_PENDING";
+ break;
+ case AUDCLNT_E_THREAD_NOT_REGISTERED:
+ s = "AUDCLNT_E_THREAD_NOT_REGISTERED";
+ break;
+ case AUDCLNT_E_EXCLUSIVE_MODE_NOT_ALLOWED:
+ s = "AUDCLNT_E_EXCLUSIVE_MODE_NOT_ALLOWED";
+ break;
+ case AUDCLNT_E_ENDPOINT_CREATE_FAILED:
+ s = "AUDCLNT_E_ENDPOINT_CREATE_FAILED";
+ break;
+ case AUDCLNT_E_SERVICE_NOT_RUNNING:
+ s = "AUDCLNT_E_SERVICE_NOT_RUNNING";
+ break;
+ case AUDCLNT_E_EVENTHANDLE_NOT_EXPECTED:
+ s = "AUDCLNT_E_EVENTHANDLE_NOT_EXPECTED";
+ break;
+ case AUDCLNT_E_EXCLUSIVE_MODE_ONLY:
+ s = "AUDCLNT_E_EXCLUSIVE_MODE_ONLY";
+ break;
+ case AUDCLNT_E_BUFDURATION_PERIOD_NOT_EQUAL:
+ s = "AUDCLNT_E_BUFDURATION_PERIOD_NOT_EQUAL";
+ break;
+ case AUDCLNT_E_EVENTHANDLE_NOT_SET:
+ s = "AUDCLNT_E_EVENTHANDLE_NOT_SET";
+ break;
+ case AUDCLNT_E_INCORRECT_BUFFER_SIZE:
+ s = "AUDCLNT_E_INCORRECT_BUFFER_SIZE";
+ break;
+ case AUDCLNT_E_BUFFER_SIZE_ERROR:
+ s = "AUDCLNT_E_BUFFER_SIZE_ERROR";
+ break;
+ case AUDCLNT_E_CPUUSAGE_EXCEEDED:
+ s = "AUDCLNT_E_CPUUSAGE_EXCEEDED";
+ break;
+ case AUDCLNT_S_BUFFER_EMPTY:
+ s = "AUDCLNT_S_BUFFER_EMPTY";
+ break;
+ case AUDCLNT_S_THREAD_ALREADY_REGISTERED:
+ s = "AUDCLNT_S_THREAD_ALREADY_REGISTERED";
+ break;
+ case AUDCLNT_S_POSITION_STALLED:
+ s = "AUDCLNT_S_POSITION_STALLED";
+ break;
+ }
+
+ return s;
+}
+
+gboolean
+gst_wasapi_util_get_default_device_client (GstElement * element,
+ gboolean capture,
+ guint rate,
+ GstClockTime buffer_time,
+ GstClockTime period_time,
+ DWORD flags, IAudioClient ** ret_client, GstClockTime * ret_latency)
+{
+ gboolean res = FALSE;
+ HRESULT hr;
+ IMMDeviceEnumerator *enumerator = NULL;
+ IMMDevice *device = NULL;
+ IAudioClient *client = NULL;
+ REFERENCE_TIME latency_rt, def_period, min_period;
+ WAVEFORMATEXTENSIBLE format;
+
+ hr = CoCreateInstance (&CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL,
+ &IID_IMMDeviceEnumerator, &enumerator);
+ if (hr != S_OK) {
+ GST_ERROR_OBJECT (element, "CoCreateInstance (MMDeviceEnumerator) failed");
+ goto beach;
+ }
+
+ hr = IMMDeviceEnumerator_GetDefaultAudioEndpoint (enumerator,
+ (capture) ? eCapture : eRender, eCommunications, &device);
+ if (hr != S_OK) {
+ GST_ERROR_OBJECT (element,
+ "IMMDeviceEnumerator::GetDefaultAudioEndpoint () failed");
+ goto beach;
+ }
+
+ hr = IMMDevice_Activate (device, &IID_IAudioClient, CLSCTX_ALL, NULL,
+ &client);
+ if (hr != S_OK) {
+ GST_ERROR_OBJECT (element, "IMMDevice::Activate (IID_IAudioClient) failed");
+ goto beach;
+ }
+
+ hr = IAudioClient_GetDevicePeriod (client, &def_period, &min_period);
+ if (hr != S_OK) {
+ GST_ERROR_OBJECT (element, "IAudioClient::GetDevicePeriod () failed");
+ goto beach;
+ }
+
+ ZeroMemory (&format, sizeof (format));
+ format.Format.cbSize = sizeof (format) - sizeof (format.Format);
+ format.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
+ format.Format.nChannels = 2;
+ format.Format.nSamplesPerSec = rate;
+ format.Format.wBitsPerSample = 16;
+ format.Format.nBlockAlign = format.Format.nChannels
+ * (format.Format.wBitsPerSample / 8);
+ format.Format.nAvgBytesPerSec = format.Format.nSamplesPerSec
+ * format.Format.nBlockAlign;
+ format.Samples.wValidBitsPerSample = 16;
+ format.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
+ format.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
+
+ hr = IAudioClient_Initialize (client, AUDCLNT_SHAREMODE_EXCLUSIVE, /* or AUDCLNT_SHAREMODE_SHARED */
+ flags, buffer_time / 100, /* buffer duration in 100s of ns */
+ period_time / 100, /* periodicity in 100s of ns */
+ (WAVEFORMATEX *) & format, NULL);
+ if (hr != S_OK) {
+ GST_ELEMENT_ERROR (element, RESOURCE, OPEN_READ, (NULL),
+ ("IAudioClient::Initialize () failed: %s",
+ gst_wasapi_util_hresult_to_string (hr)));
+ goto beach;
+ }
+
+ hr = IAudioClient_GetStreamLatency (client, &latency_rt);
+ if (hr != S_OK) {
+ GST_ERROR_OBJECT (element, "IAudioClient::GetStreamLatency () failed");
+ goto beach;
+ }
+
+ GST_INFO_OBJECT (element, "default period: %d (%d ms), "
+ "minimum period: %d (%d ms), "
+ "latency: %d (%d ms)",
+ (guint32) def_period, (guint32) def_period / 10000,
+ (guint32) min_period, (guint32) min_period / 10000,
+ (guint32) latency_rt, (guint32) latency_rt / 10000);
+
+ IUnknown_AddRef (client);
+ *ret_client = client;
+
+ *ret_latency = latency_rt * 100;
+
+ res = TRUE;
+
+beach:
+ if (client != NULL)
+ IUnknown_Release (client);
+
+ if (device != NULL)
+ IUnknown_Release (device);
+
+ if (enumerator != NULL)
+ IUnknown_Release (enumerator);
+
+ return res;
+}
+
+#if 0
+static WAVEFORMATEXTENSIBLE *
+gst_wasapi_src_probe_device_format (GstWasapiSrc * self, IMMDevice * device)
+{
+ HRESULT hr;
+ IPropertyStore *props = NULL;
+ PROPVARIANT format_prop;
+ WAVEFORMATEXTENSIBLE *format = NULL;
+
+ hr = IMMDevice_OpenPropertyStore (device, STGM_READ, &props);
+ if (hr != S_OK)
+ goto beach;
+
+ PropVariantInit (&format_prop);
+ hr = IPropertyStore_GetValue (props, &PKEY_AudioEngine_DeviceFormat,
+ &format_prop);
+ if (hr != S_OK)
+ goto beach;
+
+ format = (WAVEFORMATEXTENSIBLE *) format_prop.blob.pBlobData;
+
+ /* hmm: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices\Audio\Capture\{64adb8b7-9716-4c02-8929-96e53f5642da}\Properties */
+
+beach:
+ if (props != NULL)
+ IUnknown_Release (props);
+
+ return format;
+}
+#endif
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