avcodec/mpegvideo_enc: Move H.261 size check to h261enc.c

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/h261enc.c

@@ -382,11 +382,18 @@ static av_cold void h261_encode_init_static(void)
     init_uni_h261_rl_tab(&ff_h261_rl_tcoeff, uni_h261_rl_len);
 }
 
-av_cold void ff_h261_encode_init(MpegEncContext *s)
+av_cold int ff_h261_encode_init(MpegEncContext *s)
 {
     H261EncContext *const h = (H261EncContext*)s;
     static AVOnce init_static_once = AV_ONCE_INIT;
 
+    if (ff_h261_get_picture_format(s->width, s->height) < 0) {
+        av_log(s->avctx, AV_LOG_ERROR,
+                "The specified picture size of %dx%d is not valid for the "
+                "H.261 codec.\nValid sizes are 176x144, 352x288\n",
+                s->width, s->height);
+        return AVERROR(EINVAL);
+    }
     s->private_ctx = &h->common;
 
     s->min_qcoeff       = -127;
@@ -398,6 +405,8 @@ av_cold void ff_h261_encode_init(MpegEncContext *s)
     s->intra_ac_vlc_length      = s->inter_ac_vlc_length      = uni_h261_rl_len;
     s->intra_ac_vlc_last_length = s->inter_ac_vlc_last_length = uni_h261_rl_len + 128*64;
     ff_thread_once(&init_static_once, h261_encode_init_static);
+
+    return 0;
 }
 
 const FFCodec ff_h261_encoder = {

libavcodec/h261enc.h

@@ -35,6 +35,6 @@ void ff_h261_reorder_mb_index(MpegEncContext *s);
 void ff_h261_encode_mb(MpegEncContext *s, int16_t block[6][64],
                        int motion_x, int motion_y);
 void ff_h261_encode_picture_header(MpegEncContext *s, int picture_number);
-void ff_h261_encode_init(MpegEncContext *s);
+int ff_h261_encode_init(MpegEncContext *s);
 
 #endif

libavcodec/mpegvideo_enc.c

@@ -682,14 +682,9 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
     case AV_CODEC_ID_H261:
         if (!CONFIG_H261_ENCODER)
             return AVERROR_ENCODER_NOT_FOUND;
-        if (ff_h261_get_picture_format(s->width, s->height) < 0) {
-            av_log(avctx, AV_LOG_ERROR,
-                   "The specified picture size of %dx%d is not valid for the "
-                   "H.261 codec.\nValid sizes are 176x144, 352x288\n",
-                    s->width, s->height);
-            return AVERROR(EINVAL);
-        }
-        ff_h261_encode_init(s);
+        ret = ff_h261_encode_init(s);
+        if (ret < 0)
+            return ret;
         s->out_format = FMT_H261;
         avctx->delay  = 0;
         s->low_delay  = 1;