[FFmpeg-devel] [PATCH 04/17] avcodec/mpeg12: Avoid indirection when accessing rl_vlc tables

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

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavcodec/eamad.c      |  3 +--
 libavcodec/mdec.c       |  3 +--
 libavcodec/mpeg12.c     | 19 +++++++++++--------
 libavcodec/mpeg12dec.c  | 28 ++++++++++++----------------
 libavcodec/mpeg12vlc.h  | 14 +++++++-------
 libavcodec/speedhqdec.c |  6 ++++--
 6 files changed, 36 insertions(+), 37 deletions(-)

diff --git a/libavcodec/eamad.c b/libavcodec/eamad.c
index 2a5aac912d..20f347f0ab 100644
--- a/libavcodec/eamad.c
+++ b/libavcodec/eamad.c
@@ -134,7 +134,6 @@ static inline void idct_put(MadContext *t, AVFrame *frame, int16_t *block,
 static inline int decode_block_intra(MadContext *s, int16_t * block)
 {
     int level, i, j, run;
-    RLTable *rl = &ff_rl_mpeg1;
     const uint8_t *scantable = s->scantable.permutated;
     int16_t *quant_matrix = s->quant_matrix;
 
@@ -148,7 +147,7 @@ static inline int decode_block_intra(MadContext *s, int16_t * block)
         /* now quantify & encode AC coefficients */
         for (;;) {
             UPDATE_CACHE(re, &s->gb);
-            GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
+            GET_RL_VLC(level, run, re, &s->gb, ff_mpeg1_rl_vlc, TEX_VLC_BITS, 2, 0);
 
             if (level == 127) {
                 break;
diff --git a/libavcodec/mdec.c b/libavcodec/mdec.c
index f27cf84122..7116b73b8e 100644
--- a/libavcodec/mdec.c
+++ b/libavcodec/mdec.c
@@ -63,7 +63,6 @@ static inline int mdec_decode_block_intra(MDECContext *a, int16_t *block, int n)
 {
     int level, diff, i, j, run;
     int component;
-    RLTable *rl = &ff_rl_mpeg1;
     uint8_t * const scantable = a->scantable.permutated;
     const uint16_t *quant_matrix = a->quant_matrix;
     const int qscale = a->qscale;
@@ -84,7 +83,7 @@ static inline int mdec_decode_block_intra(MDECContext *a, int16_t *block, int n)
         /* now quantify & encode AC coefficients */
         for (;;) {
             UPDATE_CACHE(re, &a->gb);
-            GET_RL_VLC(level, run, re, &a->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
+            GET_RL_VLC(level, run, re, &a->gb, ff_mpeg1_rl_vlc, TEX_VLC_BITS, 2, 0);
 
             if (level == 127) {
                 break;
diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index df6aba9d74..351ebf420f 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -63,7 +63,8 @@ static const uint8_t table_mb_btype[11][2] = {
     { 2, 5 }, // 0x1E MB_QUANT|MB_FOR|MB_BACK|MB_PAT
 };
 
-av_cold void ff_init_2d_vlc_rl(RLTable *rl, unsigned static_size, int flags)
+av_cold void ff_init_2d_vlc_rl(const RLTable *rl, RL_VLC_ELEM rl_vlc[],
+                               unsigned static_size, int flags)
 {
     int i;
     VLCElem table[680] = { 0 };
@@ -94,9 +95,9 @@ av_cold void ff_init_2d_vlc_rl(RLTable *rl, unsigned static_size, int flags)
                 level = rl->table_level[code];
             }
         }
-        rl->rl_vlc[0][i].len   = len;
-        rl->rl_vlc[0][i].level = level;
-        rl->rl_vlc[0][i].run   = run;
+        rl_vlc[i].len   = len;
+        rl_vlc[i].level = level;
+        rl_vlc[i].run   = run;
     }
 }
 
@@ -122,6 +123,9 @@ VLC ff_mb_ptype_vlc;
 VLC ff_mb_btype_vlc;
 VLC ff_mb_pat_vlc;
 
+RL_VLC_ELEM ff_mpeg1_rl_vlc[680];
+RL_VLC_ELEM ff_mpeg2_rl_vlc[674];
+
 static av_cold void mpeg12_init_vlcs(void)
 {
     INIT_VLC_STATIC(&ff_dc_lum_vlc, DC_VLC_BITS, 12,
@@ -147,8 +151,8 @@ static av_cold void mpeg12_init_vlcs(void)
                     &table_mb_btype[0][1], 2, 1,
                     &table_mb_btype[0][0], 2, 1, 64);
 
-    INIT_2D_VLC_RL(ff_rl_mpeg1, 680, 0);
-    INIT_2D_VLC_RL(ff_rl_mpeg2, 674, 0);
+    INIT_2D_VLC_RL(ff_rl_mpeg1, ff_mpeg1_rl_vlc, 0);
+    INIT_2D_VLC_RL(ff_rl_mpeg2, ff_mpeg2_rl_vlc, 0);
 }
 
 av_cold void ff_mpeg12_init_vlcs(void)
@@ -231,7 +235,6 @@ int ff_mpeg1_decode_block_intra(GetBitContext *gb,
                                 int16_t *block, int index, int qscale)
 {
     int dc, diff, i = 0, component;
-    RLTable *rl = &ff_rl_mpeg1;
 
     /* DC coefficient */
     component = index <= 3 ? 0 : index - 4 + 1;
@@ -256,7 +259,7 @@ int ff_mpeg1_decode_block_intra(GetBitContext *gb,
         while (1) {
             int level, run, j;
 
-            GET_RL_VLC(level, run, re, gb, rl->rl_vlc[0],
+            GET_RL_VLC(level, run, re, gb, ff_mpeg1_rl_vlc,
                        TEX_VLC_BITS, 2, 0);
 
             if (level != 0) {
diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c
index c942be158e..914516bbd9 100644
--- a/libavcodec/mpeg12dec.c
+++ b/libavcodec/mpeg12dec.c
@@ -152,7 +152,6 @@ static inline int mpeg1_decode_block_inter(MpegEncContext *s,
                                            int16_t *block, int n)
 {
     int level, i, j, run;
-    RLTable *rl                  = &ff_rl_mpeg1;
     uint8_t *const scantable     = s->intra_scantable.permutated;
     const uint16_t *quant_matrix = s->inter_matrix;
     const int qscale             = s->qscale;
@@ -175,7 +174,7 @@ static inline int mpeg1_decode_block_inter(MpegEncContext *s,
         }
         /* now quantify & encode AC coefficients */
         for (;;) {
-            GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
+            GET_RL_VLC(level, run, re, &s->gb, ff_mpeg1_rl_vlc,
                        TEX_VLC_BITS, 2, 0);
 
             if (level != 0) {
@@ -241,7 +240,6 @@ static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s,
                                                 int16_t *block, int n)
 {
     int level, i, j, run;
-    RLTable *rl              = &ff_rl_mpeg1;
     uint8_t *const scantable = s->intra_scantable.permutated;
     const int qscale         = s->qscale;
 
@@ -264,7 +262,7 @@ static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s,
 
         /* now quantify & encode AC coefficients */
         for (;;) {
-            GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
+            GET_RL_VLC(level, run, re, &s->gb, ff_mpeg1_rl_vlc,
                        TEX_VLC_BITS, 2, 0);
 
             if (level != 0) {
@@ -326,7 +324,6 @@ static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
                                                int16_t *block, int n)
 {
     int level, i, j, run;
-    RLTable *rl = &ff_rl_mpeg1;
     uint8_t *const scantable = s->intra_scantable.permutated;
     const uint16_t *quant_matrix;
     const int qscale = s->qscale;
@@ -358,7 +355,7 @@ static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
 
         /* now quantify & encode AC coefficients */
         for (;;) {
-            GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
+            GET_RL_VLC(level, run, re, &s->gb, ff_mpeg1_rl_vlc,
                        TEX_VLC_BITS, 2, 0);
 
             if (level != 0) {
@@ -416,7 +413,6 @@ static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
                                                     int16_t *block, int n)
 {
     int level, i, j, run;
-    RLTable *rl              = &ff_rl_mpeg1;
     uint8_t *const scantable = s->intra_scantable.permutated;
     const int qscale         = s->qscale;
     OPEN_READER(re, &s->gb);
@@ -437,7 +433,7 @@ static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
 
     /* now quantify & encode AC coefficients */
     for (;;) {
-        GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
+        GET_RL_VLC(level, run, re, &s->gb, ff_mpeg1_rl_vlc, TEX_VLC_BITS, 2, 0);
 
         if (level != 0) {
             i += run;
@@ -489,7 +485,7 @@ static inline int mpeg2_decode_block_intra(MpegEncContext *s,
 {
     int level, dc, diff, i, j, run;
     int component;
-    RLTable *rl;
+    const RL_VLC_ELEM *rl_vlc;
     uint8_t *const scantable = s->intra_scantable.permutated;
     const uint16_t *quant_matrix;
     const int qscale = s->qscale;
@@ -512,16 +508,16 @@ static inline int mpeg2_decode_block_intra(MpegEncContext *s,
     mismatch = block[0] ^ 1;
     i = 0;
     if (s->intra_vlc_format)
-        rl = &ff_rl_mpeg2;
+        rl_vlc = ff_mpeg2_rl_vlc;
     else
-        rl = &ff_rl_mpeg1;
+        rl_vlc = ff_mpeg1_rl_vlc;
 
     {
         OPEN_READER(re, &s->gb);
         /* now quantify & encode AC coefficients */
         for (;;) {
             UPDATE_CACHE(re, &s->gb);
-            GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
+            GET_RL_VLC(level, run, re, &s->gb, rl_vlc,
                        TEX_VLC_BITS, 2, 0);
 
             if (level == 127) {
@@ -575,7 +571,7 @@ static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
 {
     int level, dc, diff, i, j, run;
     int component;
-    RLTable *rl;
+    const RL_VLC_ELEM *rl_vlc;
     uint8_t *const scantable = s->intra_scantable.permutated;
     const uint16_t *quant_matrix;
     const int qscale = s->qscale;
@@ -595,16 +591,16 @@ static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
     block[0] = dc * (1 << (3 - s->intra_dc_precision));
     i = 0;
     if (s->intra_vlc_format)
-        rl = &ff_rl_mpeg2;
+        rl_vlc = ff_mpeg2_rl_vlc;
     else
-        rl = &ff_rl_mpeg1;
+        rl_vlc = ff_mpeg1_rl_vlc;
 
     {
         OPEN_READER(re, &s->gb);
         /* now quantify & encode AC coefficients */
         for (;;) {
             UPDATE_CACHE(re, &s->gb);
-            GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0],
+            GET_RL_VLC(level, run, re, &s->gb, rl_vlc,
                        TEX_VLC_BITS, 2, 0);
 
             if (level >= 64 || i > 63) {
diff --git a/libavcodec/mpeg12vlc.h b/libavcodec/mpeg12vlc.h
index 4fb19371f0..d0083f1124 100644
--- a/libavcodec/mpeg12vlc.h
+++ b/libavcodec/mpeg12vlc.h
@@ -50,17 +50,17 @@ extern VLC ff_mv_vlc;
 
 void ff_mpeg12_init_vlcs(void);
 
-#define INIT_2D_VLC_RL(rl, static_size, flags)\
-{\
-    static RL_VLC_ELEM rl_vlc_table[static_size];\
-    rl.rl_vlc[0] = rl_vlc_table;\
-    ff_init_2d_vlc_rl(&rl, static_size, flags);\
-}
+#define INIT_2D_VLC_RL(rl, rl_vlc, flags)\
+    ff_init_2d_vlc_rl(&rl, rl_vlc, FF_ARRAY_ELEMS(rl_vlc), flags)
 
 extern RLTable ff_rl_mpeg1;
 extern RLTable ff_rl_mpeg2;
 
-void ff_init_2d_vlc_rl(RLTable *rl, unsigned static_size, int flags);
+extern RL_VLC_ELEM ff_mpeg1_rl_vlc[];
+extern RL_VLC_ELEM ff_mpeg2_rl_vlc[];
+
+void ff_init_2d_vlc_rl(const RLTable *rl, RL_VLC_ELEM rl_vlc[],
+                       unsigned static_size, int flags);
 
 void ff_mpeg1_init_uni_ac_vlc(const RLTable *rl, uint8_t *uni_ac_vlc_len);
 
diff --git a/libavcodec/speedhqdec.c b/libavcodec/speedhqdec.c
index acca437bd5..7cb5ff03cc 100644
--- a/libavcodec/speedhqdec.c
+++ b/libavcodec/speedhqdec.c
@@ -77,6 +77,8 @@ static VLC dc_chroma_vlc_le;
 static VLC dc_alpha_run_vlc_le;
 static VLC dc_alpha_level_vlc_le;
 
+static RL_VLC_ELEM speedhq_rl_vlc[674];
+
 static inline int decode_dc_le(GetBitContext *gb, int component)
 {
     int code, diff;
@@ -154,7 +156,7 @@ static inline int decode_dct_block(const SHQContext *s, GetBitContext *gb, int l
         for ( ;; ) {
             int level, run;
             UPDATE_CACHE_LE(re, gb);
-            GET_RL_VLC(level, run, re, gb, ff_rl_speedhq.rl_vlc[0],
+            GET_RL_VLC(level, run, re, gb, speedhq_rl_vlc,
                        TEX_VLC_BITS, 2, 0);
             if (level == 127) {
                 break;
@@ -564,7 +566,7 @@ static av_cold void speedhq_static_init(void)
                            ff_mpeg12_vlc_dc_chroma_code, 2, 2,
                            INIT_VLC_OUTPUT_LE, 514);
 
-    INIT_2D_VLC_RL(ff_rl_speedhq, 674, INIT_VLC_LE);
+    INIT_2D_VLC_RL(ff_rl_speedhq, speedhq_rl_vlc, INIT_VLC_LE);
 
     compute_alpha_vlcs();
 }
-- 
2.34.1

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