winegstreamer: Set GST_DEBUG if not set, based on WINEDEBUG channels.

dlls/winegstreamer/main.c

@@ -33,6 +33,8 @@
 #include "wmcodecdsp.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
+WINE_DECLARE_DEBUG_CHANNEL(mfplat);
+WINE_DECLARE_DEBUG_CHANNEL(wmvcore);
 
 DEFINE_GUID(GUID_NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
 DEFINE_GUID(MEDIASUBTYPE_VC1S,MAKEFOURCC('V','C','1','S'),0x0000,0x0010,0x80,0x00,0x00,0xaa,0x00,0x38,0x9b,0x71);
@@ -810,9 +812,15 @@ HRESULT WINAPI DllGetClassObject(REFCLSID clsid, REFIID iid, void **out)
 
 static BOOL CALLBACK init_gstreamer_proc(INIT_ONCE *once, void *param, void **ctx)
 {
+    struct wg_init_gstreamer_params params =
+    {
+        .trace_on = TRACE_ON(mfplat) || TRACE_ON(quartz) || TRACE_ON(wmvcore),
+        .warn_on = WARN_ON(mfplat) || WARN_ON(quartz) || WARN_ON(wmvcore),
+        .err_on = ERR_ON(mfplat) || ERR_ON(quartz) || ERR_ON(wmvcore),
+    };
     HINSTANCE handle;
 
-    if (WINE_UNIX_CALL(unix_wg_init_gstreamer, NULL))
+    if (WINE_UNIX_CALL(unix_wg_init_gstreamer, &params))
         return FALSE;
 
     /* Unloading glib is a bad idea.. it installs atexit handlers,

dlls/winegstreamer/unixlib.c

@@ -246,6 +246,7 @@ bool push_event(GstPad *pad, GstEvent *event)
 
 NTSTATUS wg_init_gstreamer(void *arg)
 {
+    struct wg_init_gstreamer_params *params = arg;
     char arg0[] = "wine";
     char arg1[] = "--gst-disable-registry-fork";
     char *args[] = {arg0, arg1, NULL};
@@ -253,6 +254,14 @@ NTSTATUS wg_init_gstreamer(void *arg)
     char **argv = args;
     GError *err;
 
+    if (params->trace_on)
+        setenv("GST_DEBUG", "WINE:9,4", FALSE);
+    if (params->warn_on)
+        setenv("GST_DEBUG", "3", FALSE);
+    if (params->err_on)
+        setenv("GST_DEBUG", "1", FALSE);
+    setenv("GST_DEBUG_NO_COLOR", "1", FALSE);
+
     /* GStreamer installs a temporary SEGV handler when it loads plugins
      * to initialize its registry calling exit(-1) when any fault is caught.
      * We need to make sure any signal reaches our signal handlers to catch

dlls/winegstreamer/unixlib.h

@@ -218,6 +218,13 @@ typedef UINT64 wg_parser_stream_t;
 typedef UINT64 wg_transform_t;
 typedef UINT64 wg_muxer_t;
 
+struct wg_init_gstreamer_params
+{
+    UINT8 trace_on;
+    UINT8 warn_on;
+    UINT8 err_on;
+};
+
 struct wg_parser_create_params
 {
     wg_parser_t parser;