avcodec/msvideo1enc: drop dependancy on sizeof(AVFrame)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/msvideo1enc.c

@@ -35,7 +35,6 @@
  */
 typedef struct Msvideo1EncContext {
     AVCodecContext *avctx;
-    AVFrame pic;
     AVLFG rnd;
     uint8_t *prev;
 
@@ -67,7 +66,7 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                                const AVFrame *pict, int *got_packet)
 {
     Msvideo1EncContext * const c = avctx->priv_data;
-    AVFrame * const p = &c->pic;
+    const AVFrame *p = pict;
     uint16_t *src;
     uint8_t *prevptr;
     uint8_t *dst, *buf;
@@ -75,12 +74,12 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
     int no_skips = 1;
     int i, j, k, x, y, ret;
     int skips = 0;
+    int quality = 24;
 
     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*9 + FF_MIN_BUFFER_SIZE)) < 0)
         return ret;
     dst= buf= pkt->data;
 
-    *p = *pict;
     if(!c->prev)
         c->prev = av_malloc(avctx->width * 3 * (avctx->height + 3));
     prevptr = c->prev + avctx->width * 3 * (FFALIGN(avctx->height, 4) - 1);
@@ -88,7 +87,6 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
     if(c->keyint >= avctx->keyint_min)
         keyframe = 1;
 
-    p->quality = 24;
 
     for(y = 0; y < avctx->height; y += 4){
         for(x = 0; x < avctx->width; x += 4){
@@ -114,7 +112,7 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                         bestscore += t*t;
                     }
                 }
-                bestscore /= p->quality;
+                bestscore /= quality;
             }
             // try to find optimal value to fill whole 4x4 block
             score = 0;
@@ -130,7 +128,7 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                     }
                 }
             }
-            score /= p->quality;
+            score /= quality;
             score += 2;
             if(score < bestscore){
                 bestscore = score;
@@ -155,7 +153,7 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                     }
                 }
             }
-            score /= p->quality;
+            score /= quality;
             score += 6;
             if(score < bestscore){
                 bestscore = score;
@@ -182,7 +180,7 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                     }
                 }
             }
-            score /= p->quality;
+            score /= quality;
             score += 18;
             if(score < bestscore){
                 bestscore = score;
@@ -248,8 +246,6 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
         c->keyint = 0;
     else
         c->keyint++;
-    p->pict_type= keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
-    p->key_frame= keyframe;
     if (keyframe) pkt->flags |= AV_PKT_FLAG_KEY;
     pkt->size = dst - buf;
     *got_packet = 1;
@@ -274,8 +270,6 @@ static av_cold int encode_init(AVCodecContext *avctx)
         return -1;
     }
 
-    avcodec_get_frame_defaults(&c->pic);
-    avctx->coded_frame = (AVFrame*)&c->pic;
     avctx->bits_per_coded_sample = 16;
 
     c->keyint = avctx->keyint_min;