ffplay: use AVFrame::width and height instead of using codec or filter settings

Codec values may not reflect the actual frame size, and it also enables us to
simplify code in the avfilter enabled and the avfilter disabled case.

Signed-off-by: Marton Balint <cus@passwd.hu>

ffplay.c

@@ -233,6 +233,11 @@ typedef struct VideoState {
     int refresh;
 } VideoState;
 
+typedef struct AllocEventProps {
+    VideoState *is;
+    AVFrame *frame;
+} AllocEventProps;
+
 static int opt_help(const char *opt, const char *arg);
 
 /* options specified by the user */
@@ -934,6 +939,7 @@ static int video_open(VideoState *is, int force_set_video_mode)
 {
     int flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
     int w,h;
+    VideoPicture *vp = &is->pictq[is->pictq_rindex];
 
     if (is_full_screen) flags |= SDL_FULLSCREEN;
     else                flags |= SDL_RESIZABLE;
@@ -944,15 +950,9 @@ static int video_open(VideoState *is, int force_set_video_mode)
     } else if (!is_full_screen && screen_width) {
         w = screen_width;
         h = screen_height;
-#if CONFIG_AVFILTER
-    } else if (is->out_video_filter && is->out_video_filter->inputs[0]) {
-        w = is->out_video_filter->inputs[0]->w;
-        h = is->out_video_filter->inputs[0]->h;
-#else
-    } else if (is->video_st && is->video_st->codec->width) {
-        w = is->video_st->codec->width;
-        h = is->video_st->codec->height;
-#endif
+    } else if (vp->width) {
+        w = vp->width;
+        h = vp->height;
     } else {
         w = 640;
         h = 480;
@@ -1293,9 +1293,10 @@ display:
 
 /* allocate a picture (needs to do that in main thread to avoid
    potential locking problems */
-static void alloc_picture(void *opaque)
+static void alloc_picture(AllocEventProps *event_props)
 {
-    VideoState *is = opaque;
+    VideoState *is = event_props->is;
+    AVFrame *frame = event_props->frame;
     VideoPicture *vp;
 
     vp = &is->pictq[is->pictq_windex];
@@ -1307,16 +1308,14 @@ static void alloc_picture(void *opaque)
     if (vp->picref)
         avfilter_unref_buffer(vp->picref);
     vp->picref = NULL;
-
-    vp->width   = is->out_video_filter->inputs[0]->w;
-    vp->height  = is->out_video_filter->inputs[0]->h;
-    vp->pix_fmt = is->out_video_filter->inputs[0]->format;
-#else
-    vp->width   = is->video_st->codec->width;
-    vp->height  = is->video_st->codec->height;
-    vp->pix_fmt = is->video_st->codec->pix_fmt;
 #endif
 
+    vp->width   = frame->width;
+    vp->height  = frame->height;
+    vp->pix_fmt = frame->format;
+
+    video_open(event_props->is, 0);
+
     vp->bmp = SDL_CreateYUVOverlay(vp->width, vp->height,
                                    SDL_YV12_OVERLAY,
                                    screen);
@@ -1378,22 +1377,22 @@ static int queue_picture(VideoState *is, AVFrame *src_frame, double pts1, int64_
 
     /* alloc or resize hardware picture buffer */
     if (!vp->bmp || vp->reallocate ||
-#if CONFIG_AVFILTER
-        vp->width  != is->out_video_filter->inputs[0]->w ||
-        vp->height != is->out_video_filter->inputs[0]->h) {
-#else
-        vp->width != is->video_st->codec->width ||
-        vp->height != is->video_st->codec->height) {
-#endif
+        vp->width  != src_frame->width ||
+        vp->height != src_frame->height) {
         SDL_Event event;
+        AllocEventProps event_props;
+
+        event_props.frame = src_frame;
+        event_props.is = is;
 
         vp->allocated  = 0;
         vp->reallocate = 0;
 
         /* the allocation must be done in the main thread to avoid
-           locking problems */
+           locking problems. We wait in this block for the event to complete,
+           so we can pass a pointer to event_props to it. */
         event.type = FF_ALLOC_EVENT;
-        event.user.data1 = is;
+        event.user.data1 = &event_props;
         SDL_PushEvent(&event);
 
         /* wait until the picture is allocated */
@@ -2972,7 +2971,6 @@ static void event_loop(VideoState *cur_stream)
             do_exit(cur_stream);
             break;
         case FF_ALLOC_EVENT:
-            video_open(event.user.data1, 0);
             alloc_picture(event.user.data1);
             break;
         case FF_REFRESH_EVENT: