wasapi: Implement default audio channel mask

Some multichannel capture devices does not provide a channel mask value
which will result in a pipeline failure due to the empty channel mask.

Implemented the same fix used for wasapi2

Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1204

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2692>

diff --git a/subprojects/gst-plugins-bad/sys/wasapi/gstwasapiutil.c b/subprojects/gst-plugins-bad/sys/wasapi/gstwasapiutil.c
index b59f5f1..a8bd999 100644 (file)
--- a/subprojects/gst-plugins-bad/sys/wasapi/gstwasapiutil.c
+++ b/subprojects/gst-plugins-bad/sys/wasapi/gstwasapiutil.c
@@ -82,6 +82,72 @@ const IID IID_IAudioRenderClient = { 0xf294acfc, 0x3146, 0x4483,
   {0xa7, 0xbf, 0xad, 0xdc, 0xa7, 0xc2, 0x60, 0xe2}
 };
 
+/* 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
+
+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-OFF* */
 static struct
 {
@@ -705,6 +771,17 @@ gst_wasapi_util_waveformatex_to_channel_mask (WAVEFORMATEXTENSIBLE * format,
   DWORD dwChannelMask = format->dwChannelMask;
   GstAudioChannelPosition *pos = 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 ("Too many channels %d", nChannels);
+      return 0;
+    }
+
+    dwChannelMask = default_ch_masks[nChannels];
+  }
+
   pos = g_new (GstAudioChannelPosition, nChannels);
   gst_wasapi_util_channel_position_all_none (nChannels, pos);