avcodec/mpegvideo: return more specific error codes for ff_mpv_common_init()

Signed-off-by: Limin Wang <lance.lmwang@gmail.com>

libavcodec/mpegvideo.c

@@ -907,7 +907,7 @@ av_cold int ff_mpv_common_init(MpegEncContext *s)
     if (s->avctx->pix_fmt == AV_PIX_FMT_NONE) {
         av_log(s->avctx, AV_LOG_ERROR,
                "decoding to AV_PIX_FMT_NONE is not supported.\n");
-        return -1;
+        return AVERROR(EINVAL);
     }
 
     if (nb_slices > MAX_THREADS || (nb_slices > s->mb_height && s->mb_height)) {
@@ -923,7 +923,7 @@ av_cold int ff_mpv_common_init(MpegEncContext *s)
 
     if ((s->width || s->height) &&
         av_image_check_size(s->width, s->height, 0, s->avctx))
-        return -1;
+        return AVERROR(EINVAL);
 
     dct_init(s);
 
@@ -935,27 +935,27 @@ av_cold int ff_mpv_common_init(MpegEncContext *s)
         return ret;
 
     FF_ALLOCZ_OR_GOTO(s->avctx, s->picture,
-                      MAX_PICTURE_COUNT * sizeof(Picture), fail);
+                      MAX_PICTURE_COUNT * sizeof(Picture), fail_nomem);
     for (i = 0; i < MAX_PICTURE_COUNT; i++) {
         s->picture[i].f = av_frame_alloc();
         if (!s->picture[i].f)
-            goto fail;
+            goto fail_nomem;
     }
     s->next_picture.f = av_frame_alloc();
     if (!s->next_picture.f)
-        goto fail;
+        goto fail_nomem;
     s->last_picture.f = av_frame_alloc();
     if (!s->last_picture.f)
-        goto fail;
+        goto fail_nomem;
     s->current_picture.f = av_frame_alloc();
     if (!s->current_picture.f)
-        goto fail;
+        goto fail_nomem;
     s->new_picture.f = av_frame_alloc();
     if (!s->new_picture.f)
-        goto fail;
+        goto fail_nomem;
 
-    if (init_context_frame(s))
-        goto fail;
+    if ((ret = init_context_frame(s)))
+        goto fail_nomem;
 
     s->parse_context.state = -1;
 
@@ -969,9 +969,9 @@ av_cold int ff_mpv_common_init(MpegEncContext *s)
             if (i) {
                 s->thread_context[i] = av_memdup(s, sizeof(MpegEncContext));
                 if (!s->thread_context[i])
-                    goto fail;
+                    goto fail_nomem;
             }
-            if (init_duplicate_context(s->thread_context[i]) < 0)
+            if ((ret = init_duplicate_context(s->thread_context[i])) < 0)
                 goto fail;
             s->thread_context[i]->start_mb_y =
                 (s->mb_height * (i) + nb_slices / 2) / nb_slices;
@@ -979,7 +979,7 @@ av_cold int ff_mpv_common_init(MpegEncContext *s)
                 (s->mb_height * (i + 1) + nb_slices / 2) / nb_slices;
         }
     } else {
-        if (init_duplicate_context(s) < 0)
+        if ((ret = init_duplicate_context(s)) < 0)
             goto fail;
         s->start_mb_y = 0;
         s->end_mb_y   = s->mb_height;
@@ -988,9 +988,11 @@ av_cold int ff_mpv_common_init(MpegEncContext *s)
 //     }
 
     return 0;
+ fail_nomem:
+    ret = AVERROR(ENOMEM);
  fail:
     ff_mpv_common_end(s);
-    return -1;
+    return ret;
 }
 
 /**