avcodec/mpegvideo: Move allocating new_picture to the encoder

It is only used by encoders; this unfortunately necessitated
to add separate allocations to the SVQ1 encoder which uses
motion estimation without being a full member of mpegvideo.

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

libavcodec/mpegvideo.c

@@ -632,7 +632,6 @@ static void clear_context(MpegEncContext *s)
     memset(&s->next_picture, 0, sizeof(s->next_picture));
     memset(&s->last_picture, 0, sizeof(s->last_picture));
     memset(&s->current_picture, 0, sizeof(s->current_picture));
-    memset(&s->new_picture, 0, sizeof(s->new_picture));
 
     memset(s->thread_context, 0, sizeof(s->thread_context));
 
@@ -720,8 +719,7 @@ av_cold int ff_mpv_common_init(MpegEncContext *s)
 
     if (!(s->next_picture.f    = av_frame_alloc()) ||
         !(s->last_picture.f    = av_frame_alloc()) ||
-        !(s->current_picture.f = av_frame_alloc()) ||
-        !(s->new_picture       = av_frame_alloc()))
+        !(s->current_picture.f = av_frame_alloc()))
         goto fail_nomem;
 
     if ((ret = ff_mpv_init_context_frame(s)))
@@ -801,7 +799,6 @@ void ff_mpv_common_end(MpegEncContext *s)
     ff_mpv_picture_free(s->avctx, &s->last_picture);
     ff_mpv_picture_free(s->avctx, &s->current_picture);
     ff_mpv_picture_free(s->avctx, &s->next_picture);
-    av_frame_free(&s->new_picture);
 
     s->context_initialized      = 0;
     s->context_reinit           = 0;

libavcodec/mpegvideo_enc.c

@@ -821,7 +821,8 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
         !FF_ALLOCZ_TYPED_ARRAY(s->q_chroma_intra_matrix16, 32) ||
         !FF_ALLOCZ_TYPED_ARRAY(s->q_inter_matrix16,        32) ||
         !FF_ALLOCZ_TYPED_ARRAY(s->input_picture,           MAX_PICTURE_COUNT) ||
-        !FF_ALLOCZ_TYPED_ARRAY(s->reordered_input_picture, MAX_PICTURE_COUNT))
+        !FF_ALLOCZ_TYPED_ARRAY(s->reordered_input_picture, MAX_PICTURE_COUNT) ||
+        !(s->new_picture = av_frame_alloc()))
         return AVERROR(ENOMEM);
 
     /* Allocate MV tables; the MV and MB tables will be copied

libavcodec/svq1enc.c

@@ -570,6 +570,7 @@ static av_cold int svq1_encode_end(AVCodecContext *avctx)
 
     av_frame_free(&s->current_picture);
     av_frame_free(&s->last_picture);
+    av_frame_free(&s->m.new_picture);
 
     return 0;
 }
@@ -632,10 +633,11 @@ static av_cold int svq1_encode_init(AVCodecContext *avctx)
     s->dummy               = av_mallocz((s->y_block_width + 1) *
                                         s->y_block_height * sizeof(int32_t));
     s->m.me.map            = av_mallocz(2 * ME_MAP_SIZE * sizeof(*s->m.me.map));
+    s->m.new_picture       = av_frame_alloc();
     s->svq1encdsp.ssd_int8_vs_int16 = ssd_int8_vs_int16_c;
 
-    if (!s->m.me.temp || !s->m.me.scratchpad || !s->m.me.map ||
-        !s->mb_type || !s->dummy)
+    if (!s->m.me.scratchpad || !s->m.me.map ||
+        !s->mb_type || !s->dummy || !s->m.new_picture)
         return AVERROR(ENOMEM);
     s->m.me.score_map = s->m.me.map + ME_MAP_SIZE;