mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-06 17:39:47 +00:00
77225c79f9
To open automatic stream routing aware device, at least Windows10 Anniversary Update is required. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1545>
492 lines
16 KiB
C
492 lines
16 KiB
C
/*
|
|
* Copyright (C) 2008 Ole André Vadla Ravnås <ole.andre.ravnas@tandberg.com>
|
|
* Copyright (C) 2018 Centricular Ltd.
|
|
* Author: Nirbheek Chauhan <nirbheek@centricular.com>
|
|
* Copyright (C) 2020 Seungha Yang <seungha@centricular.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., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include "gstwasapi2util.h"
|
|
#include <audioclient.h>
|
|
#include <mmdeviceapi.h>
|
|
#include <winternl.h>
|
|
|
|
GST_DEBUG_CATEGORY_EXTERN (gst_wasapi2_debug);
|
|
#define GST_CAT_DEFAULT gst_wasapi2_debug
|
|
|
|
/* Desktop only defines */
|
|
#ifndef KSAUDIO_SPEAKER_MONO
|
|
#define KSAUDIO_SPEAKER_MONO (SPEAKER_FRONT_CENTER)
|
|
#endif
|
|
#ifndef KSAUDIO_SPEAKER_1POINT1
|
|
#define KSAUDIO_SPEAKER_1POINT1 (SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY)
|
|
#endif
|
|
#ifndef KSAUDIO_SPEAKER_STEREO
|
|
#define KSAUDIO_SPEAKER_STEREO (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT)
|
|
#endif
|
|
#ifndef KSAUDIO_SPEAKER_2POINT1
|
|
#define KSAUDIO_SPEAKER_2POINT1 (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_LOW_FREQUENCY)
|
|
#endif
|
|
#ifndef KSAUDIO_SPEAKER_3POINT0
|
|
#define KSAUDIO_SPEAKER_3POINT0 (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER)
|
|
#endif
|
|
#ifndef KSAUDIO_SPEAKER_3POINT1
|
|
#define KSAUDIO_SPEAKER_3POINT1 (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | \
|
|
SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY)
|
|
#endif
|
|
#ifndef KSAUDIO_SPEAKER_QUAD
|
|
#define KSAUDIO_SPEAKER_QUAD (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | \
|
|
SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT)
|
|
#endif
|
|
#define KSAUDIO_SPEAKER_SURROUND (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | \
|
|
SPEAKER_FRONT_CENTER | SPEAKER_BACK_CENTER)
|
|
#ifndef KSAUDIO_SPEAKER_5POINT0
|
|
#define KSAUDIO_SPEAKER_5POINT0 (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | \
|
|
SPEAKER_SIDE_LEFT | SPEAKER_SIDE_RIGHT)
|
|
#endif
|
|
#define KSAUDIO_SPEAKER_5POINT1 (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | \
|
|
SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | \
|
|
SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT)
|
|
#ifndef KSAUDIO_SPEAKER_7POINT0
|
|
#define KSAUDIO_SPEAKER_7POINT0 (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | \
|
|
SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT | \
|
|
SPEAKER_SIDE_LEFT | SPEAKER_SIDE_RIGHT)
|
|
#endif
|
|
#ifndef KSAUDIO_SPEAKER_7POINT1
|
|
#define KSAUDIO_SPEAKER_7POINT1 (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | \
|
|
SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | \
|
|
SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT | \
|
|
SPEAKER_FRONT_LEFT_OF_CENTER | SPEAKER_FRONT_RIGHT_OF_CENTER)
|
|
#endif
|
|
|
|
/* *INDENT-OFF* */
|
|
static struct
|
|
{
|
|
guint64 wasapi_pos;
|
|
GstAudioChannelPosition gst_pos;
|
|
} wasapi_to_gst_pos[] = {
|
|
{SPEAKER_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT},
|
|
{SPEAKER_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT},
|
|
{SPEAKER_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER},
|
|
{SPEAKER_LOW_FREQUENCY, GST_AUDIO_CHANNEL_POSITION_LFE1},
|
|
{SPEAKER_BACK_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT},
|
|
{SPEAKER_BACK_RIGHT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT},
|
|
{SPEAKER_FRONT_LEFT_OF_CENTER,
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER},
|
|
{SPEAKER_FRONT_RIGHT_OF_CENTER,
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER},
|
|
{SPEAKER_BACK_CENTER, GST_AUDIO_CHANNEL_POSITION_REAR_CENTER},
|
|
/* Enum values diverge from this point onwards */
|
|
{SPEAKER_SIDE_LEFT, GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT},
|
|
{SPEAKER_SIDE_RIGHT, GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT},
|
|
{SPEAKER_TOP_CENTER, GST_AUDIO_CHANNEL_POSITION_TOP_CENTER},
|
|
{SPEAKER_TOP_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_LEFT},
|
|
{SPEAKER_TOP_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_CENTER},
|
|
{SPEAKER_TOP_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_RIGHT},
|
|
{SPEAKER_TOP_BACK_LEFT, GST_AUDIO_CHANNEL_POSITION_TOP_REAR_LEFT},
|
|
{SPEAKER_TOP_BACK_CENTER, GST_AUDIO_CHANNEL_POSITION_TOP_REAR_CENTER},
|
|
{SPEAKER_TOP_BACK_RIGHT, GST_AUDIO_CHANNEL_POSITION_TOP_REAR_RIGHT}
|
|
};
|
|
|
|
static DWORD default_ch_masks[] = {
|
|
0,
|
|
KSAUDIO_SPEAKER_MONO,
|
|
/* 2ch */
|
|
KSAUDIO_SPEAKER_STEREO,
|
|
/* 2.1ch */
|
|
/* KSAUDIO_SPEAKER_3POINT0 ? */
|
|
KSAUDIO_SPEAKER_2POINT1,
|
|
/* 4ch */
|
|
/* KSAUDIO_SPEAKER_3POINT1 or KSAUDIO_SPEAKER_SURROUND ? */
|
|
KSAUDIO_SPEAKER_QUAD,
|
|
/* 5ch */
|
|
KSAUDIO_SPEAKER_5POINT0,
|
|
/* 5.1ch */
|
|
KSAUDIO_SPEAKER_5POINT1,
|
|
/* 7ch */
|
|
KSAUDIO_SPEAKER_7POINT0,
|
|
/* 7.1ch */
|
|
KSAUDIO_SPEAKER_7POINT1,
|
|
};
|
|
/* *INDENT-ON* */
|
|
|
|
static const gchar *
|
|
hresult_to_string_fallback (HRESULT hr)
|
|
{
|
|
const gchar *s = "unknown error";
|
|
|
|
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_DEVICE_PERIOD:
|
|
s = "AUDCLNT_E_INVALID_DEVICE_PERIOD";
|
|
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_BUFFER_SIZE_ERROR:
|
|
s = "AUDCLNT_E_BUFFER_SIZE_ERROR";
|
|
break;
|
|
case AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED:
|
|
s = "AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED";
|
|
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_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;
|
|
case E_POINTER:
|
|
s = "E_POINTER";
|
|
break;
|
|
case E_INVALIDARG:
|
|
s = "E_INVALIDARG";
|
|
break;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
gchar *
|
|
gst_wasapi2_util_get_error_message (HRESULT hr)
|
|
{
|
|
gchar *error_text = NULL;
|
|
|
|
error_text = g_win32_error_message ((gint) hr);
|
|
if (!error_text || strlen (error_text) == 0) {
|
|
g_free (error_text);
|
|
error_text = g_strdup (hresult_to_string_fallback (hr));
|
|
}
|
|
|
|
return error_text;
|
|
}
|
|
|
|
gboolean
|
|
_gst_wasapi2_result (HRESULT hr, GstDebugCategory * cat, const gchar * file,
|
|
const gchar * function, gint line)
|
|
{
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
gboolean ret = TRUE;
|
|
|
|
if (FAILED (hr)) {
|
|
gchar *error_text = NULL;
|
|
gboolean free_string = TRUE;
|
|
|
|
error_text = g_win32_error_message ((gint) hr);
|
|
/* g_win32_error_message() seems to be returning empty string for
|
|
* AUDCLNT_* cases */
|
|
if (!error_text || strlen (error_text) == 0) {
|
|
g_free (error_text);
|
|
error_text = (gchar *) hresult_to_string_fallback (hr);
|
|
|
|
free_string = FALSE;
|
|
}
|
|
|
|
gst_debug_log (cat, GST_LEVEL_WARNING, file, function, line,
|
|
NULL, "WASAPI call failed: 0x%x, %s", (guint) hr, error_text);
|
|
|
|
if (free_string)
|
|
g_free (error_text);
|
|
|
|
ret = FALSE;
|
|
}
|
|
|
|
return ret;
|
|
#else
|
|
return SUCCEEDED (hr);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
gst_wasapi_util_channel_position_all_none (guint channels,
|
|
GstAudioChannelPosition * position)
|
|
{
|
|
guint i;
|
|
|
|
for (i = 0; i < channels; i++)
|
|
position[i] = GST_AUDIO_CHANNEL_POSITION_NONE;
|
|
}
|
|
|
|
guint64
|
|
gst_wasapi2_util_waveformatex_to_channel_mask (WAVEFORMATEX * format,
|
|
GstAudioChannelPosition ** out_position)
|
|
{
|
|
guint i, ch;
|
|
guint64 mask = 0;
|
|
GstAudioChannelPosition *pos = NULL;
|
|
WORD nChannels = 0;
|
|
DWORD dwChannelMask = 0;
|
|
|
|
nChannels = format->nChannels;
|
|
if (format->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
|
|
WAVEFORMATEXTENSIBLE *extensible = (WAVEFORMATEXTENSIBLE *) format;
|
|
dwChannelMask = extensible->dwChannelMask;
|
|
}
|
|
|
|
if (out_position)
|
|
*out_position = NULL;
|
|
|
|
if (nChannels > 2 && !dwChannelMask) {
|
|
GST_WARNING ("Unknown channel mask value for %d channel stream", nChannels);
|
|
|
|
if (nChannels >= G_N_ELEMENTS (default_ch_masks)) {
|
|
GST_ERROR ("To may channels %d", nChannels);
|
|
return 0;
|
|
}
|
|
|
|
dwChannelMask = default_ch_masks[nChannels];
|
|
}
|
|
|
|
pos = g_new (GstAudioChannelPosition, nChannels);
|
|
gst_wasapi_util_channel_position_all_none (nChannels, pos);
|
|
|
|
/* Too many channels, have to assume that they are all non-positional */
|
|
if (nChannels > G_N_ELEMENTS (wasapi_to_gst_pos)) {
|
|
GST_INFO ("Got too many (%i) channels, assuming non-positional", nChannels);
|
|
goto out;
|
|
}
|
|
|
|
/* Too many bits in the channel mask, and the bits don't match nChannels */
|
|
if (dwChannelMask >> (G_N_ELEMENTS (wasapi_to_gst_pos) + 1) != 0) {
|
|
GST_WARNING ("Too many bits in channel mask (%lu), assuming "
|
|
"non-positional", dwChannelMask);
|
|
goto out;
|
|
}
|
|
|
|
/* Map WASAPI's channel mask to Gstreamer's channel mask and positions.
|
|
* If the no. of bits in the mask > nChannels, we will ignore the extra. */
|
|
for (i = 0, ch = 0; i < G_N_ELEMENTS (wasapi_to_gst_pos) && ch < nChannels;
|
|
i++) {
|
|
if (!(dwChannelMask & wasapi_to_gst_pos[i].wasapi_pos))
|
|
/* no match, try next */
|
|
continue;
|
|
mask |= G_GUINT64_CONSTANT (1) << wasapi_to_gst_pos[i].gst_pos;
|
|
pos[ch++] = wasapi_to_gst_pos[i].gst_pos;
|
|
}
|
|
|
|
/* XXX: Warn if some channel masks couldn't be mapped? */
|
|
|
|
GST_DEBUG ("Converted WASAPI mask 0x%" G_GINT64_MODIFIER "x -> 0x%"
|
|
G_GINT64_MODIFIER "x", (guint64) dwChannelMask, (guint64) mask);
|
|
|
|
out:
|
|
if (out_position) {
|
|
*out_position = pos;
|
|
} else {
|
|
g_free (pos);
|
|
}
|
|
|
|
return mask;
|
|
}
|
|
|
|
const gchar *
|
|
gst_wasapi2_util_waveformatex_to_audio_format (WAVEFORMATEX * format)
|
|
{
|
|
const gchar *fmt_str = NULL;
|
|
GstAudioFormat fmt = GST_AUDIO_FORMAT_UNKNOWN;
|
|
|
|
switch (format->wFormatTag) {
|
|
case WAVE_FORMAT_PCM:
|
|
fmt = gst_audio_format_build_integer (TRUE, G_LITTLE_ENDIAN,
|
|
format->wBitsPerSample, format->wBitsPerSample);
|
|
break;
|
|
case WAVE_FORMAT_IEEE_FLOAT:
|
|
if (format->wBitsPerSample == 32)
|
|
fmt = GST_AUDIO_FORMAT_F32LE;
|
|
else if (format->wBitsPerSample == 64)
|
|
fmt = GST_AUDIO_FORMAT_F64LE;
|
|
break;
|
|
case WAVE_FORMAT_EXTENSIBLE:
|
|
{
|
|
WAVEFORMATEXTENSIBLE *ex = (WAVEFORMATEXTENSIBLE *) format;
|
|
if (IsEqualGUID (&ex->SubFormat, &KSDATAFORMAT_SUBTYPE_PCM)) {
|
|
fmt = gst_audio_format_build_integer (TRUE, G_LITTLE_ENDIAN,
|
|
format->wBitsPerSample, ex->Samples.wValidBitsPerSample);
|
|
} else if (IsEqualGUID (&ex->SubFormat, &KSDATAFORMAT_SUBTYPE_IEEE_FLOAT)) {
|
|
if (format->wBitsPerSample == 32
|
|
&& ex->Samples.wValidBitsPerSample == 32)
|
|
fmt = GST_AUDIO_FORMAT_F32LE;
|
|
else if (format->wBitsPerSample == 64 &&
|
|
ex->Samples.wValidBitsPerSample == 64)
|
|
fmt = GST_AUDIO_FORMAT_F64LE;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (fmt != GST_AUDIO_FORMAT_UNKNOWN)
|
|
fmt_str = gst_audio_format_to_string (fmt);
|
|
|
|
return fmt_str;
|
|
}
|
|
|
|
gboolean
|
|
gst_wasapi2_util_parse_waveformatex (WAVEFORMATEX * format,
|
|
GstCaps * template_caps, GstCaps ** out_caps,
|
|
GstAudioChannelPosition ** out_positions)
|
|
{
|
|
const gchar *afmt;
|
|
guint64 channel_mask;
|
|
|
|
*out_caps = NULL;
|
|
|
|
/* TODO: handle SPDIF and other encoded formats */
|
|
|
|
/* 1 or 2 channels <= 16 bits sample size OR
|
|
* 1 or 2 channels > 16 bits sample size or >2 channels */
|
|
if (format->wFormatTag != WAVE_FORMAT_PCM &&
|
|
format->wFormatTag != WAVE_FORMAT_IEEE_FLOAT &&
|
|
format->wFormatTag != WAVE_FORMAT_EXTENSIBLE)
|
|
/* Unhandled format tag */
|
|
return FALSE;
|
|
|
|
/* WASAPI can only tell us one canonical mix format that it will accept. The
|
|
* alternative is calling IsFormatSupported on all combinations of formats.
|
|
* Instead, it's simpler and faster to require conversion inside gstreamer */
|
|
afmt = gst_wasapi2_util_waveformatex_to_audio_format (format);
|
|
if (afmt == NULL)
|
|
return FALSE;
|
|
|
|
*out_caps = gst_caps_copy (template_caps);
|
|
|
|
channel_mask = gst_wasapi2_util_waveformatex_to_channel_mask (format,
|
|
out_positions);
|
|
|
|
gst_caps_set_simple (*out_caps,
|
|
"format", G_TYPE_STRING, afmt,
|
|
"channels", G_TYPE_INT, format->nChannels,
|
|
"rate", G_TYPE_INT, format->nSamplesPerSec, NULL);
|
|
|
|
if (channel_mask) {
|
|
gst_caps_set_simple (*out_caps,
|
|
"channel-mask", GST_TYPE_BITMASK, channel_mask, NULL);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
gst_wasapi2_can_automatic_stream_routing (void)
|
|
{
|
|
#ifdef GST_WASAPI2_WINAPI_ONLY_APP
|
|
/* Assume we are on very recent OS */
|
|
return TRUE;
|
|
#else
|
|
static gboolean ret = FALSE;
|
|
static gsize version_once = 0;
|
|
|
|
if (g_once_init_enter (&version_once)) {
|
|
OSVERSIONINFOEXW osverinfo;
|
|
typedef NTSTATUS (WINAPI fRtlGetVersion) (PRTL_OSVERSIONINFOEXW);
|
|
fRtlGetVersion *RtlGetVersion = NULL;
|
|
HMODULE hmodule = NULL;
|
|
|
|
memset (&osverinfo, 0, sizeof (OSVERSIONINFOEXW));
|
|
osverinfo.dwOSVersionInfoSize = sizeof (OSVERSIONINFOEXW);
|
|
|
|
hmodule = LoadLibraryW (L"ntdll.dll");
|
|
if (hmodule)
|
|
RtlGetVersion =
|
|
(fRtlGetVersion *) GetProcAddress (hmodule, "RtlGetVersion");
|
|
|
|
if (RtlGetVersion) {
|
|
RtlGetVersion (&osverinfo);
|
|
|
|
/* automatic stream routing requires Windows 10
|
|
* Anniversary Update (version 1607, build number 14393.0) */
|
|
if (osverinfo.dwMajorVersion > 10 ||
|
|
(osverinfo.dwMajorVersion == 10 && osverinfo.dwBuildNumber >= 14393))
|
|
ret = TRUE;
|
|
}
|
|
|
|
if (hmodule)
|
|
FreeLibrary (hmodule);
|
|
|
|
g_once_init_leave (&version_once, 1);
|
|
}
|
|
|
|
GST_INFO ("Automatic stream routing support: %d", ret);
|
|
|
|
return ret;
|
|
#endif
|
|
}
|