proresenc: Drop unnecessary DCT permutation bits

No permutation is necessary for the FDCT.

libavcodec/proresdsp.c

@@ -86,8 +86,5 @@ av_cold void ff_proresdsp_init(ProresDSPContext *dsp)
 #endif
 #if CONFIG_PRORES_ENCODER
     dsp->fdct                 = prores_fdct_c;
-    dsp->dct_permutation_type = FF_NO_IDCT_PERM;
-    ff_init_scantable_permutation(dsp->dct_permutation,
-                                  dsp->dct_permutation_type);
 #endif
 }

libavcodec/proresdsp.h

@@ -30,8 +30,6 @@
 typedef struct ProresDSPContext {
     int idct_permutation_type;
     uint8_t idct_permutation[64];
-    int dct_permutation_type;
-    uint8_t dct_permutation[64];
     void (* idct_put) (uint16_t *out, int linesize, int16_t *block, const int16_t *qmat);
     void (* fdct) (const uint16_t *src, int linesize, int16_t *block);
 } ProresDSPContext;

libavcodec/proresenc.c

@@ -190,9 +190,9 @@ typedef struct ProresContext {
     int16_t quants[MAX_STORED_Q][64];
     int16_t custom_q[64];
     const uint8_t *quant_mat;
+    const uint8_t *scantable;
 
     ProresDSPContext dsp;
-    ScanTable  scantable;
 
     int mb_width, mb_height;
     int mbs_per_slice;
@@ -426,7 +426,7 @@ static int encode_slice_plane(ProresContext *ctx, PutBitContext *pb,
 
     encode_dcs(pb, blocks, blocks_per_slice, qmat[0]);
     encode_acs(pb, blocks, blocks_per_slice, plane_size_factor,
-               ctx->scantable.permutated, qmat);
+               ctx->scantable, qmat);
     flush_put_bits(pb);
 
     return (put_bits_count(pb) - saved_pos) >> 3;
@@ -673,7 +673,7 @@ static int estimate_slice_plane(ProresContext *ctx, int *error, int plane,
 
     bits  = estimate_dcs(error, td->blocks[plane], blocks_per_slice, qmat[0]);
     bits += estimate_acs(error, td->blocks[plane], blocks_per_slice,
-                         plane_size_factor, ctx->scantable.permutated, qmat);
+                         plane_size_factor, ctx->scantable, qmat);
 
     return FFALIGN(bits, 8);
 }
@@ -1080,9 +1080,8 @@ static av_cold int encode_init(AVCodecContext *avctx)
         return AVERROR(ENOMEM);
 
     ff_proresdsp_init(&ctx->dsp);
-    ff_init_scantable(ctx->dsp.dct_permutation, &ctx->scantable,
-                      interlaced ? ff_prores_interlaced_scan
-                                 : ff_prores_progressive_scan);
+    ctx->scantable = interlaced ? ff_prores_interlaced_scan
+                                : ff_prores_progressive_scan;
 
     mps = ctx->mbs_per_slice;
     if (mps & (mps - 1)) {