intrax8: Reference the current AVCodecContext

It will be needed to initialize BlockDSP in the next commit.

libavcodec/intrax8.c

@@ -737,13 +737,15 @@ static void x8_init_block_index(IntraX8Context *w, AVFrame *frame, int mb_y)
     w->dest[2] += (mb_y & (~1)) * uvlinesize << 2;
 }
 
-av_cold int ff_intrax8_common_init(IntraX8Context *w, IDCTDSPContext *idsp,
+av_cold int ff_intrax8_common_init(AVCodecContext *avctx,
+                                   IntraX8Context *w, IDCTDSPContext *idsp,
                                    MpegEncContext *const s)
 {
     int ret = x8_vlc_init();
     if (ret < 0)
         return ret;
 
+    w->avctx = avctx;
     w->idsp = *idsp;
     w->s = s;
 

libavcodec/intrax8.h

@@ -35,6 +35,7 @@ typedef struct IntraX8Context {
     // set by ff_intrax8_common_init
     uint8_t *prediction_table; // 2 * (mb_w * 2)
     ScanTable scantable[3];
+    AVCodecContext *avctx;
 
     // set by the caller codec
     MpegEncContext *s;
@@ -67,12 +68,14 @@ typedef struct IntraX8Context {
 /**
  * Initialize IntraX8 frame decoder.
  * Requires valid MpegEncContext with valid s->mb_width before calling.
+ * @param avctx pointer to AVCodecContext
  * @param w pointer to IntraX8Context
  * @param idsp pointer to IDCTDSPContext
  * @param s pointer to MpegEncContext of the parent codec
  * @return 0 on success, a negative AVERROR value on error
  */
-int ff_intrax8_common_init(IntraX8Context *w, IDCTDSPContext *idsp,
+int ff_intrax8_common_init(AVCodecContext *avctx,
+                           IntraX8Context *w, IDCTDSPContext *idsp,
                            MpegEncContext *const s);
 
 /**

libavcodec/vc1dec.c

@@ -379,7 +379,7 @@ av_cold int ff_vc1_decode_init_alloc_tables(VC1Context *v)
         }
     }
 
-    ret = ff_intrax8_common_init(&v->x8, &s->idsp, s);
+    ret = ff_intrax8_common_init(s->avctx, &v->x8, &s->idsp, s);
     if (ret < 0)
         goto error;
 

libavcodec/wmv2dec.c

@@ -473,7 +473,7 @@ static av_cold int wmv2_decode_init(AVCodecContext *avctx)
 
     ff_wmv2_common_init(w);
 
-    return ff_intrax8_common_init(&w->x8, &w->s.idsp, &w->s);
+    return ff_intrax8_common_init(avctx, &w->x8, &w->s.idsp, &w->s);
 }
 
 static av_cold int wmv2_decode_end(AVCodecContext *avctx)