windows bugfixes and improvements

include/mediastreamer2/msvideo.h

@@ -192,7 +192,8 @@ MSPixFmt ffmpeg_pix_fmt_to_ms(int fmt);
 MSPixFmt ms_fourcc_to_pix_fmt(uint32_t fourcc);
 void ms_ffmpeg_check_init(void);
 int ms_yuv_buf_init_from_mblk(MSPicture *buf, mblk_t *m);
-void ms_yuv_buf_init_from_mblk_with_size(MSPicture *buf, mblk_t *m, int w, int h);
+int ms_yuv_buf_init_from_mblk_with_size(MSPicture *buf, mblk_t *m, int w, int h);
+int ms_picture_init_from_mblk_with_size(MSPicture *buf, mblk_t *m, MSPixFmt fmt, int w, int h);
 mblk_t * ms_yuv_buf_alloc(MSPicture *buf, int w, int h);
 void ms_yuv_buf_copy(uint8_t *src_planes[], const int src_strides[], 
 		uint8_t *dst_planes[], const int dst_strides[3], MSVideoSize roi);

src/msdscap-mingw.cc

@@ -731,7 +731,7 @@ static int find_best_format(ComPtr<IAMStreamConfig> streamConfig, int count, MSV
 				MSVideoSize cur;
 				cur.width=infoHeader->bmiHeader.biWidth;
 				cur.height=infoHeader->bmiHeader.biHeight;
-				if (ms_video_size_greater_than(cur,*requested_size)){
+				if (ms_video_size_greater_than(*requested_size,cur)){
 					if (ms_video_size_greater_than(best_found,cur)){
 						best_found=cur;
 						best_index=i;

src/msvideo.c

@@ -138,8 +138,29 @@ int ms_yuv_buf_init_from_mblk(YuvBuf *buf, mblk_t *m){
 	return 0;
 }
 
-void ms_yuv_buf_init_from_mblk_with_size(YuvBuf *buf, mblk_t *m, int w, int h){
-	yuv_buf_init(buf,w,h,m->b_rptr);
+int ms_yuv_buf_init_from_mblk_with_size(YuvBuf *buf, mblk_t *m, int w, int h){
+  yuv_buf_init(buf,w,h,m->b_rptr);
+  return 0;
+
+}
+
+int ms_picture_init_from_mblk_with_size(MSPicture *buf, mblk_t *m, MSPixFmt fmt, int w, int h){
+	switch(fmt){
+		case MS_YUV420P:
+			return ms_yuv_buf_init_from_mblk_with_size(buf,m,w,h);
+		break;
+		case MS_YUY2:
+			memset(buf,0,sizeof(*buf));
+			buf->w=w;
+			buf->h=h;
+			buf->planes[0]=m->b_rptr;
+			buf->strides[0]=w*2;
+		break;
+		default:
+			ms_fatal("FIXME: unsupported format %i",fmt);
+			return -1;
+	}
+	return 0;
 }
 
 mblk_t * ms_yuv_buf_alloc(YuvBuf *buf, int w, int h){

src/pixconv.c

@@ -81,7 +81,7 @@ static void pixconv_process(MSFilter *f){
 			om=im;
 		}else{
 			MSPicture inbuf;
-			if (ms_yuv_buf_init_from_mblk(&inbuf,im)==0){
+			if (ms_picture_init_from_mblk_with_size(&inbuf,im,s->in_fmt,s->size.width,s->size.height)==0){
 				om=pixconv_alloc_mblk(s);
 				if (s->scaler==NULL){
 					s->scaler=ms_scaler_create_context(inbuf.w, inbuf.h,