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[FFmpeg-devel,v2,111/162] avcodec/rv34: Avoid offsets table for initialization of static VLCs

Message ID 20201120073327.820745-12-andreas.rheinhardt@gmail.com
State New
Headers show
Series VLC, esp. init_vlc patches
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Commit Message

Andreas Rheinhardt Nov. 20, 2020, 7:32 a.m. UTC
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
---
 libavcodec/rv34.c | 68 +++++++++++++++++++++--------------------------
 1 file changed, 30 insertions(+), 38 deletions(-)
diff mbox series

Patch

diff --git a/libavcodec/rv34.c b/libavcodec/rv34.c
index 09fa962b2f..e633c348bd 100644
--- a/libavcodec/rv34.c
+++ b/libavcodec/rv34.c
@@ -76,27 +76,6 @@  static int rv34_decode_mv(RV34DecContext *r, int block_type);
  * @{
  */
 
-static const int table_offs[] = {
-      0,   1818,   3622,   4144,   4698,   5234,   5804,   5868,   5900,   5932,
-   5996,   6252,   6316,   6348,   6380,   7674,   8944,  10274,  11668,  12250,
-  14060,  15846,  16372,  16962,  17512,  18148,  18180,  18212,  18244,  18308,
-  18564,  18628,  18660,  18692,  20036,  21314,  22648,  23968,  24614,  26384,
-  28190,  28736,  29366,  29938,  30608,  30640,  30672,  30704,  30768,  31024,
-  31088,  31120,  31184,  32570,  33898,  35236,  36644,  37286,  39020,  40802,
-  41368,  42052,  42692,  43348,  43380,  43412,  43444,  43476,  43604,  43668,
-  43700,  43732,  45100,  46430,  47778,  49160,  49802,  51550,  53340,  53972,
-  54648,  55348,  55994,  56122,  56154,  56186,  56218,  56346,  56410,  56442,
-  56474,  57878,  59290,  60636,  62036,  62682,  64460,  64524,  64588,  64716,
-  64844,  66076,  67466,  67978,  68542,  69064,  69648,  70296,  72010,  72074,
-  72138,  72202,  72330,  73572,  74936,  75454,  76030,  76566,  77176,  77822,
-  79582,  79646,  79678,  79742,  79870,  81180,  82536,  83064,  83672,  84242,
-  84934,  85576,  87384,  87448,  87480,  87544,  87672,  88982,  90340,  90902,
-  91598,  92182,  92846,  93488,  95246,  95278,  95310,  95374,  95502,  96878,
-  98266,  98848,  99542, 100234, 100884, 101524, 103320, 103352, 103384, 103416,
- 103480, 104874, 106222, 106910, 107584, 108258, 108902, 109544, 111366, 111398,
- 111430, 111462, 111494, 112878, 114320, 114988, 115660, 116310, 116950, 117592
-};
-
 static VLC_TYPE table_data[117592][2];
 
 /**
@@ -108,7 +87,7 @@  static VLC_TYPE table_data[117592][2];
  * @param num    VLC table number (for static initialization)
  */
 static void rv34_gen_vlc(const uint8_t *bits, int size, VLC *vlc, const uint8_t *syms,
-                         const int num)
+                         int *offset)
 {
     int counts[17] = {0}, codes[17];
     uint16_t cw[MAX_VLC_SIZE];
@@ -128,12 +107,13 @@  static void rv34_gen_vlc(const uint8_t *bits, int size, VLC *vlc, const uint8_t
     for (int i = 0; i < size; i++)
         cw[i] = codes[bits[i]]++;
 
-    vlc->table = &table_data[table_offs[num]];
-    vlc->table_allocated = table_offs[num + 1] - table_offs[num];
+    vlc->table           = &table_data[*offset];
+    vlc->table_allocated = FF_ARRAY_ELEMS(table_data) - *offset;
     ff_init_vlc_sparse(vlc, FFMIN(maxbits, 9), size,
                        bits, 1, 1,
                        cw,    2, 2,
-                       syms, !!syms, !!syms, INIT_VLC_USE_NEW_STATIC);
+                       syms, !!syms, !!syms, INIT_VLC_STATIC_OVERLONG);
+    *offset += vlc->table_size;
 }
 
 /**
@@ -141,34 +121,46 @@  static void rv34_gen_vlc(const uint8_t *bits, int size, VLC *vlc, const uint8_t
  */
 static av_cold void rv34_init_tables(void)
 {
-    int i, j, k;
+    int i, j, k, offset = 0;
 
     for(i = 0; i < NUM_INTRA_TABLES; i++){
         for(j = 0; j < 2; j++){
-            rv34_gen_vlc(rv34_table_intra_cbppat   [i][j], CBPPAT_VLC_SIZE,   &intra_vlcs[i].cbppattern[j],     NULL, 19*i + 0 + j);
-            rv34_gen_vlc(rv34_table_intra_secondpat[i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].second_pattern[j], NULL, 19*i + 2 + j);
-            rv34_gen_vlc(rv34_table_intra_thirdpat [i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].third_pattern[j],  NULL, 19*i + 4 + j);
+            rv34_gen_vlc(rv34_table_intra_cbppat   [i][j], CBPPAT_VLC_SIZE,
+                         &intra_vlcs[i].cbppattern[j],     NULL, &offset);
+            rv34_gen_vlc(rv34_table_intra_secondpat[i][j], OTHERBLK_VLC_SIZE,
+                         &intra_vlcs[i].second_pattern[j], NULL, &offset);
+            rv34_gen_vlc(rv34_table_intra_thirdpat [i][j], OTHERBLK_VLC_SIZE,
+                         &intra_vlcs[i].third_pattern[j],  NULL, &offset);
             for(k = 0; k < 4; k++){
-                rv34_gen_vlc(rv34_table_intra_cbp[i][j+k*2],  CBP_VLC_SIZE,   &intra_vlcs[i].cbp[j][k],         rv34_cbp_code, 19*i + 6 + j*4 + k);
+                rv34_gen_vlc(rv34_table_intra_cbp[i][j+k*2],  CBP_VLC_SIZE,
+                             &intra_vlcs[i].cbp[j][k], rv34_cbp_code, &offset);
             }
         }
         for(j = 0; j < 4; j++){
-            rv34_gen_vlc(rv34_table_intra_firstpat[i][j], FIRSTBLK_VLC_SIZE, &intra_vlcs[i].first_pattern[j], NULL, 19*i + 14 + j);
+            rv34_gen_vlc(rv34_table_intra_firstpat[i][j], FIRSTBLK_VLC_SIZE,
+                         &intra_vlcs[i].first_pattern[j], NULL, &offset);
         }
-        rv34_gen_vlc(rv34_intra_coeff[i], COEFF_VLC_SIZE, &intra_vlcs[i].coefficient, NULL, 19*i + 18);
+        rv34_gen_vlc(rv34_intra_coeff[i], COEFF_VLC_SIZE,
+                     &intra_vlcs[i].coefficient, NULL, &offset);
     }
 
     for(i = 0; i < NUM_INTER_TABLES; i++){
-        rv34_gen_vlc(rv34_inter_cbppat[i], CBPPAT_VLC_SIZE, &inter_vlcs[i].cbppattern[0], NULL, i*12 + 95);
+        rv34_gen_vlc(rv34_inter_cbppat[i], CBPPAT_VLC_SIZE,
+                     &inter_vlcs[i].cbppattern[0], NULL, &offset);
         for(j = 0; j < 4; j++){
-            rv34_gen_vlc(rv34_inter_cbp[i][j], CBP_VLC_SIZE, &inter_vlcs[i].cbp[0][j], rv34_cbp_code, i*12 + 96 + j);
+            rv34_gen_vlc(rv34_inter_cbp[i][j], CBP_VLC_SIZE,
+                         &inter_vlcs[i].cbp[0][j], rv34_cbp_code, &offset);
         }
         for(j = 0; j < 2; j++){
-            rv34_gen_vlc(rv34_table_inter_firstpat [i][j], FIRSTBLK_VLC_SIZE, &inter_vlcs[i].first_pattern[j],  NULL, i*12 + 100 + j);
-            rv34_gen_vlc(rv34_table_inter_secondpat[i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].second_pattern[j], NULL, i*12 + 102 + j);
-            rv34_gen_vlc(rv34_table_inter_thirdpat [i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].third_pattern[j],  NULL, i*12 + 104 + j);
+            rv34_gen_vlc(rv34_table_inter_firstpat [i][j], FIRSTBLK_VLC_SIZE,
+                         &inter_vlcs[i].first_pattern[j],  NULL, &offset);
+            rv34_gen_vlc(rv34_table_inter_secondpat[i][j], OTHERBLK_VLC_SIZE,
+                         &inter_vlcs[i].second_pattern[j], NULL, &offset);
+            rv34_gen_vlc(rv34_table_inter_thirdpat [i][j], OTHERBLK_VLC_SIZE,
+                         &inter_vlcs[i].third_pattern[j],  NULL, &offset);
         }
-        rv34_gen_vlc(rv34_inter_coeff[i], COEFF_VLC_SIZE, &inter_vlcs[i].coefficient, NULL, i*12 + 106);
+        rv34_gen_vlc(rv34_inter_coeff[i], COEFF_VLC_SIZE,
+                     &inter_vlcs[i].coefficient, NULL, &offset);
     }
 }