[FFmpeg-devel] [PATCH 10/61] avcodec/ituh263dec: Avoid superfluous VLC structures

[Andreas Rheinhardt <andreas.rheinhardt@outlook.com>]

Of all these VLCs here, only VLC.table was really used
after init, so use the ff_vlc_init_tables API
to get rid of them.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavcodec/h263dec.h       |  8 ++---
 libavcodec/ituh263dec.c    | 68 +++++++++++++++++++-------------------
 libavcodec/mpeg4videodec.c | 18 +++++-----
 libavcodec/msmpeg4dec.c    | 12 +++----
 4 files changed, 53 insertions(+), 53 deletions(-)

diff --git a/libavcodec/h263dec.h b/libavcodec/h263dec.h
index 9f1db72903..06ff7c1c48 100644
--- a/libavcodec/h263dec.h
+++ b/libavcodec/h263dec.h
@@ -33,10 +33,10 @@
 #define CBPY_VLC_BITS 6
 #define TEX_VLC_BITS 9
 
-extern VLC ff_h263_intra_MCBPC_vlc;
-extern VLC ff_h263_inter_MCBPC_vlc;
-extern VLC ff_h263_cbpy_vlc;
-extern VLC ff_h263_mv_vlc;
+extern VLCElem ff_h263_intra_MCBPC_vlc[];
+extern VLCElem ff_h263_inter_MCBPC_vlc[];
+extern VLCElem ff_h263_cbpy_vlc[];
+extern VLCElem ff_h263_mv_vlc[];
 
 extern const enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[];
 
diff --git a/libavcodec/ituh263dec.c b/libavcodec/ituh263dec.c
index f9c8476ecd..81b456405f 100644
--- a/libavcodec/ituh263dec.c
+++ b/libavcodec/ituh263dec.c
@@ -99,38 +99,38 @@ void ff_h263_show_pict_info(MpegEncContext *s){
 /***********************************************/
 /* decoding */
 
-VLC ff_h263_intra_MCBPC_vlc;
-VLC ff_h263_inter_MCBPC_vlc;
-VLC ff_h263_cbpy_vlc;
-VLC ff_h263_mv_vlc;
-static VLC h263_mbtype_b_vlc;
-static VLC cbpc_b_vlc;
+VLCElem ff_h263_intra_MCBPC_vlc[72];
+VLCElem ff_h263_inter_MCBPC_vlc[198];
+VLCElem ff_h263_cbpy_vlc[64];
+VLCElem ff_h263_mv_vlc[538];
+static VLCElem h263_mbtype_b_vlc[80];
+static VLCElem cbpc_b_vlc[8];
 
 /* init vlcs */
 
 static av_cold void h263_decode_init_vlc(void)
 {
-    VLC_INIT_STATIC(&ff_h263_intra_MCBPC_vlc, INTRA_MCBPC_VLC_BITS, 9,
-                    ff_h263_intra_MCBPC_bits, 1, 1,
-                    ff_h263_intra_MCBPC_code, 1, 1, 72);
-    VLC_INIT_STATIC(&ff_h263_inter_MCBPC_vlc, INTER_MCBPC_VLC_BITS, 28,
-                    ff_h263_inter_MCBPC_bits, 1, 1,
-                    ff_h263_inter_MCBPC_code, 1, 1, 198);
-    VLC_INIT_STATIC(&ff_h263_cbpy_vlc, CBPY_VLC_BITS, 16,
-                    &ff_h263_cbpy_tab[0][1], 2, 1,
-                    &ff_h263_cbpy_tab[0][0], 2, 1, 64);
-    VLC_INIT_STATIC(&ff_h263_mv_vlc, H263_MV_VLC_BITS, 33,
-                    &ff_mvtab[0][1], 2, 1,
-                    &ff_mvtab[0][0], 2, 1, 538);
+    VLC_INIT_STATIC_TABLE(ff_h263_intra_MCBPC_vlc, INTRA_MCBPC_VLC_BITS, 9,
+                          ff_h263_intra_MCBPC_bits, 1, 1,
+                          ff_h263_intra_MCBPC_code, 1, 1, 0);
+    VLC_INIT_STATIC_TABLE(ff_h263_inter_MCBPC_vlc, INTER_MCBPC_VLC_BITS, 28,
+                          ff_h263_inter_MCBPC_bits, 1, 1,
+                          ff_h263_inter_MCBPC_code, 1, 1, 0);
+    VLC_INIT_STATIC_TABLE(ff_h263_cbpy_vlc, CBPY_VLC_BITS, 16,
+                          &ff_h263_cbpy_tab[0][1], 2, 1,
+                          &ff_h263_cbpy_tab[0][0], 2, 1, 0);
+    VLC_INIT_STATIC_TABLE(ff_h263_mv_vlc, H263_MV_VLC_BITS, 33,
+                          &ff_mvtab[0][1], 2, 1,
+                          &ff_mvtab[0][0], 2, 1, 0);
     ff_h263_init_rl_inter();
     VLC_INIT_RL(ff_h263_rl_inter, 554);
     INIT_FIRST_VLC_RL(ff_rl_intra_aic, 554);
-    VLC_INIT_STATIC(&h263_mbtype_b_vlc, H263_MBTYPE_B_VLC_BITS, 15,
-                    &ff_h263_mbtype_b_tab[0][1], 2, 1,
-                    &ff_h263_mbtype_b_tab[0][0], 2, 1, 80);
-    VLC_INIT_STATIC(&cbpc_b_vlc, CBPC_B_VLC_BITS, 4,
-                    &ff_cbpc_b_tab[0][1], 2, 1,
-                    &ff_cbpc_b_tab[0][0], 2, 1, 8);
+    VLC_INIT_STATIC_TABLE(h263_mbtype_b_vlc, H263_MBTYPE_B_VLC_BITS, 15,
+                          &ff_h263_mbtype_b_tab[0][1], 2, 1,
+                          &ff_h263_mbtype_b_tab[0][0], 2, 1, 0);
+    VLC_INIT_STATIC_TABLE(cbpc_b_vlc, CBPC_B_VLC_BITS, 4,
+                          &ff_cbpc_b_tab[0][1], 2, 1,
+                          &ff_cbpc_b_tab[0][0], 2, 1, 0);
 }
 
 av_cold void ff_h263_decode_init_vlc(void)
@@ -273,7 +273,7 @@ int ff_h263_resync(MpegEncContext *s){
 int ff_h263_decode_motion(MpegEncContext * s, int pred, int f_code)
 {
     int code, val, sign, shift;
-    code = get_vlc2(&s->gb, ff_h263_mv_vlc.table, H263_MV_VLC_BITS, 2);
+    code = get_vlc2(&s->gb, ff_h263_mv_vlc, H263_MV_VLC_BITS, 2);
 
     if (code == 0)
         return pred;
@@ -366,13 +366,13 @@ static void preview_obmc(MpegEncContext *s){
             s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
             goto end;
         }
-        cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
+        cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc, INTER_MCBPC_VLC_BITS, 2);
     }while(cbpc == 20);
 
     if(cbpc & 4){
         s->current_picture.mb_type[xy] = MB_TYPE_INTRA;
     }else{
-        get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
+        get_vlc2(&s->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1);
         if (cbpc & 8) {
             if(s->modified_quant){
                 if(get_bits1(&s->gb)) skip_bits(&s->gb, 1);
@@ -809,7 +809,7 @@ int ff_h263_decode_mb(MpegEncContext *s,
                 s->mb_skipped = !(s->obmc | s->loop_filter);
                 goto end;
             }
-            cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
+            cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc, INTER_MCBPC_VLC_BITS, 2);
             if (cbpc < 0){
                 av_log(s->avctx, AV_LOG_ERROR, "cbpc damaged at %d %d\n", s->mb_x, s->mb_y);
                 return SLICE_ERROR;
@@ -824,7 +824,7 @@ int ff_h263_decode_mb(MpegEncContext *s,
 
         if(s->pb_frame && get_bits1(&s->gb))
             pb_mv_count = h263_get_modb(&s->gb, s->pb_frame, &cbpb);
-        cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
+        cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1);
 
         if (cbpy < 0) {
             av_log(s->avctx, AV_LOG_ERROR, "cbpy damaged at %d %d\n", s->mb_x, s->mb_y);
@@ -905,7 +905,7 @@ int ff_h263_decode_mb(MpegEncContext *s,
         mot_val1[1       ]= mot_val1[3       ]= mot_val1[1+2*stride]= mot_val1[3+2*stride]= 0;
 
         do{
-            mb_type= get_vlc2(&s->gb, h263_mbtype_b_vlc.table, H263_MBTYPE_B_VLC_BITS, 2);
+            mb_type= get_vlc2(&s->gb, h263_mbtype_b_vlc, H263_MBTYPE_B_VLC_BITS, 2);
             if (mb_type < 0){
                 av_log(s->avctx, AV_LOG_ERROR, "b mb_type damaged at %d %d\n", s->mb_x, s->mb_y);
                 return SLICE_ERROR;
@@ -917,13 +917,13 @@ int ff_h263_decode_mb(MpegEncContext *s,
         s->mb_intra = IS_INTRA(mb_type);
         if(HAS_CBP(mb_type)){
             s->bdsp.clear_blocks(s->block[0]);
-            cbpc = get_vlc2(&s->gb, cbpc_b_vlc.table, CBPC_B_VLC_BITS, 1);
+            cbpc = get_vlc2(&s->gb, cbpc_b_vlc, CBPC_B_VLC_BITS, 1);
             if(s->mb_intra){
                 dquant = IS_QUANT(mb_type);
                 goto intra;
             }
 
-            cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
+            cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1);
 
             if (cbpy < 0){
                 av_log(s->avctx, AV_LOG_ERROR, "b cbpy damaged at %d %d\n", s->mb_x, s->mb_y);
@@ -1009,7 +1009,7 @@ int ff_h263_decode_mb(MpegEncContext *s,
         s->current_picture.mb_type[xy] = mb_type;
     } else { /* I-Frame */
         do{
-            cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
+            cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc, INTRA_MCBPC_VLC_BITS, 2);
             if (cbpc < 0){
                 av_log(s->avctx, AV_LOG_ERROR, "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y);
                 return SLICE_ERROR;
@@ -1034,7 +1034,7 @@ intra:
 
         if(s->pb_frame && get_bits1(&s->gb))
             pb_mv_count = h263_get_modb(&s->gb, s->pb_frame, &cbpb);
-        cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
+        cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1);
         if(cbpy<0){
             av_log(s->avctx, AV_LOG_ERROR, "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y);
             return SLICE_ERROR;
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c
index a8dd57bf6b..51a2c7fe35 100644
--- a/libavcodec/mpeg4videodec.c
+++ b/libavcodec/mpeg4videodec.c
@@ -960,7 +960,7 @@ static int mpeg4_decode_partition_a(Mpeg4DecContext *ctx)
                     if (show_bits(&s->gb, 19) == DC_MARKER)
                         return mb_num - 1;
 
-                    cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
+                    cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc, INTRA_MCBPC_VLC_BITS, 2);
                     if (cbpc < 0) {
                         av_log(s->avctx, AV_LOG_ERROR,
                                "mcbpc corrupted at %d %d\n", s->mb_x, s->mb_y);
@@ -1032,7 +1032,7 @@ try_again:
                     continue;
                 }
 
-                cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
+                cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc, INTER_MCBPC_VLC_BITS, 2);
                 if (cbpc < 0) {
                     av_log(s->avctx, AV_LOG_ERROR,
                            "mcbpc corrupted at %d %d\n", s->mb_x, s->mb_y);
@@ -1147,7 +1147,7 @@ static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count)
 
             if (s->pict_type == AV_PICTURE_TYPE_I) {
                 int ac_pred = get_bits1(&s->gb);
-                int cbpy    = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
+                int cbpy    = get_vlc2(&s->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1);
                 if (cbpy < 0) {
                     av_log(s->avctx, AV_LOG_ERROR,
                            "cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
@@ -1161,7 +1161,7 @@ static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count)
                     int i;
                     int dir     = 0;
                     int ac_pred = get_bits1(&s->gb);
-                    int cbpy    = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
+                    int cbpy    = get_vlc2(&s->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1);
 
                     if (cbpy < 0) {
                         av_log(s->avctx, AV_LOG_ERROR,
@@ -1193,7 +1193,7 @@ static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count)
                     s->current_picture.qscale_table[xy] = s->qscale;
                     s->cbp_table[xy]                    = 0;
                 } else {
-                    int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
+                    int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1);
 
                     if (cbpy < 0) {
                         av_log(s->avctx, AV_LOG_ERROR,
@@ -1689,7 +1689,7 @@ static int mpeg4_decode_mb(MpegEncContext *s, int16_t block[6][64])
                 }
                 goto end;
             }
-            cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
+            cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc, INTER_MCBPC_VLC_BITS, 2);
             if (cbpc < 0) {
                 av_log(s->avctx, AV_LOG_ERROR,
                        "mcbpc damaged at %d %d\n", s->mb_x, s->mb_y);
@@ -1708,7 +1708,7 @@ static int mpeg4_decode_mb(MpegEncContext *s, int16_t block[6][64])
             s->mcsel = get_bits1(&s->gb);
         else
             s->mcsel = 0;
-        cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1) ^ 0x0F;
+        cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1) ^ 0x0F;
         if (cbpy < 0) {
             av_log(s->avctx, AV_LOG_ERROR,
                    "P cbpy damaged at %d %d\n", s->mb_x, s->mb_y);
@@ -1951,7 +1951,7 @@ static int mpeg4_decode_mb(MpegEncContext *s, int16_t block[6][64])
         int use_intra_dc_vlc;
 
         do {
-            cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
+            cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc, INTRA_MCBPC_VLC_BITS, 2);
             if (cbpc < 0) {
                 av_log(s->avctx, AV_LOG_ERROR,
                        "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y);
@@ -1969,7 +1969,7 @@ intra:
         else
             s->current_picture.mb_type[xy] = MB_TYPE_INTRA;
 
-        cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
+        cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1);
         if (cbpy < 0) {
             av_log(s->avctx, AV_LOG_ERROR,
                    "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y);
diff --git a/libavcodec/msmpeg4dec.c b/libavcodec/msmpeg4dec.c
index a81241b1bb..e61045c2f9 100644
--- a/libavcodec/msmpeg4dec.c
+++ b/libavcodec/msmpeg4dec.c
@@ -75,7 +75,7 @@ static int msmpeg4v2_decode_motion(MpegEncContext * s, int pred, int f_code)
 {
     int code, val, sign, shift;
 
-    code = get_vlc2(&s->gb, ff_h263_mv_vlc.table, H263_MV_VLC_BITS, 2);
+    code = get_vlc2(&s->gb, ff_h263_mv_vlc, H263_MV_VLC_BITS, 2);
     ff_dlog(s, "MV code %d at %d %d pred: %d\n", code, s->mb_x,s->mb_y, pred);
     if (code < 0)
         return 0xffff;
@@ -127,7 +127,7 @@ static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64])
         if(s->msmpeg4_version==2)
             code = get_vlc2(&s->gb, v2_mb_type_vlc.table, V2_MB_TYPE_VLC_BITS, 1);
         else
-            code = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
+            code = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc, INTER_MCBPC_VLC_BITS, 2);
         if(code<0 || code>7){
             av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", code, s->mb_x, s->mb_y);
             return -1;
@@ -141,7 +141,7 @@ static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64])
         if(s->msmpeg4_version==2)
             cbp= get_vlc2(&s->gb, v2_intra_cbpc_vlc.table, V2_INTRA_CBPC_VLC_BITS, 1);
         else
-            cbp= get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
+            cbp = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc, INTRA_MCBPC_VLC_BITS, 2);
         if(cbp<0 || cbp>3){
             av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y);
             return -1;
@@ -151,7 +151,7 @@ static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64])
     if (!s->mb_intra) {
         int mx, my, cbpy;
 
-        cbpy= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
+        cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1);
         if(cbpy<0){
             av_log(s->avctx, AV_LOG_ERROR, "cbpy %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y);
             return -1;
@@ -173,7 +173,7 @@ static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64])
         int v;
         if(s->msmpeg4_version==2){
             s->ac_pred = get_bits1(&s->gb);
-            v = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
+            v = get_vlc2(&s->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1);
             if (v < 0) {
                 av_log(s->avctx, AV_LOG_ERROR, "cbpy vlc invalid\n");
                 return -1;
@@ -181,7 +181,7 @@ static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64])
             cbp|= v<<2;
         } else{
             s->ac_pred = 0;
-            v = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
+            v = get_vlc2(&s->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1);
             if (v < 0) {
                 av_log(s->avctx, AV_LOG_ERROR, "cbpy vlc invalid\n");
                 return -1;
-- 
2.34.1

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