[FFmpeg-cvslog] avcodec/mpeg12: Pass parameters explicitly in ff_init_2d_vlc_rl()

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Sat Oct 22 01:58:49 2022 +0200| [4a8fe21ab4390affc8da9ff51103d9d32fad0044] | committer: Andreas Rheinhardt

avcodec/mpeg12: Pass parameters explicitly in ff_init_2d_vlc_rl()

This allows to exploit that ff_rl_mpeg1 and ff_rl_mpeg2
only differ in their VLC table.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4a8fe21ab4390affc8da9ff51103d9d32fad0044
---

 libavcodec/mpeg12.c     | 23 ++++++++++++++---------
 libavcodec/mpeg12vlc.h  |  8 +++-----
 libavcodec/speedhqdec.c |  4 +++-
 3 files changed, 20 insertions(+), 15 deletions(-)

diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 351ebf420f..282e473700 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -63,14 +63,15 @@ 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(const RLTable *rl, RL_VLC_ELEM rl_vlc[],
-                               unsigned static_size, int flags)
+av_cold void ff_init_2d_vlc_rl(const uint16_t table_vlc[][2], RL_VLC_ELEM rl_vlc[],
+                               const int8_t table_run[], const uint8_t table_level[],
+                               int n, unsigned static_size, int flags)
 {
     int i;
     VLCElem table[680] = { 0 };
     VLC vlc = { .table = table, .table_allocated = static_size };
     av_assert0(static_size <= FF_ARRAY_ELEMS(table));
-    init_vlc(&vlc, TEX_VLC_BITS, rl->n + 2, &rl->table_vlc[0][1], 4, 2, &rl->table_vlc[0][0], 4, 2, INIT_VLC_USE_NEW_STATIC | flags);
+    init_vlc(&vlc, TEX_VLC_BITS, n + 2, &table_vlc[0][1], 4, 2, &table_vlc[0][0], 4, 2, INIT_VLC_USE_NEW_STATIC | flags);
 
     for (i = 0; i < vlc.table_size; i++) {
         int code = vlc.table[i].sym;
@@ -84,15 +85,15 @@ av_cold void ff_init_2d_vlc_rl(const RLTable *rl, RL_VLC_ELEM rl_vlc[],
             run   = 0;
             level = code;
         } else {
-            if (code == rl->n) { //esc
+            if (code == n) { //esc
                 run   = 65;
                 level = 0;
-            } else if (code == rl->n+1) { //eob
+            } else if (code == n + 1) { //eob
                 run   = 0;
                 level = 127;
             } else {
-                run   = rl->table_run  [code] + 1;
-                level = rl->table_level[code];
+                run   = table_run  [code] + 1;
+                level = table_level[code];
             }
         }
         rl_vlc[i].len   = len;
@@ -151,8 +152,12 @@ 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, ff_mpeg1_rl_vlc, 0);
-    INIT_2D_VLC_RL(ff_rl_mpeg2, ff_mpeg2_rl_vlc, 0);
+    ff_init_2d_vlc_rl(ff_mpeg1_vlc_table, ff_mpeg1_rl_vlc, ff_rl_mpeg1.table_run,
+                      ff_rl_mpeg1.table_level, ff_rl_mpeg1.n,
+                      FF_ARRAY_ELEMS(ff_mpeg1_rl_vlc), 0);
+    ff_init_2d_vlc_rl(ff_mpeg2_vlc_table, ff_mpeg2_rl_vlc, ff_rl_mpeg1.table_run,
+                      ff_rl_mpeg1.table_level, ff_rl_mpeg1.n,
+                      FF_ARRAY_ELEMS(ff_mpeg2_rl_vlc), 0);
 }
 
 av_cold void ff_mpeg12_init_vlcs(void)
diff --git a/libavcodec/mpeg12vlc.h b/libavcodec/mpeg12vlc.h
index 5a04834bee..dc7f0269bf 100644
--- a/libavcodec/mpeg12vlc.h
+++ b/libavcodec/mpeg12vlc.h
@@ -50,9 +50,6 @@ extern VLC ff_mv_vlc;
 
 void ff_mpeg12_init_vlcs(void);
 
-#define INIT_2D_VLC_RL(rl, rl_vlc, flags)\
-    ff_init_2d_vlc_rl(&rl, rl_vlc, FF_ARRAY_ELEMS(rl_vlc), flags)
-
 #define MPEG12_RL_NB_ELEMS 111
 
 extern RLTable ff_rl_mpeg1;
@@ -64,8 +61,9 @@ extern const uint16_t ff_mpeg2_vlc_table[MPEG12_RL_NB_ELEMS + 2][2];
 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_init_2d_vlc_rl(const uint16_t table_vlc[][2], RL_VLC_ELEM rl_vlc[],
+                       const int8_t table_run[], const uint8_t table_level[],
+                       int n, unsigned static_size, int flags);
 
 void ff_mpeg1_init_uni_ac_vlc(const int8_t max_level[], const uint8_t index_run[],
                               const uint16_t table_vlc[][2], uint8_t uni_ac_vlc_len[]);
diff --git a/libavcodec/speedhqdec.c b/libavcodec/speedhqdec.c
index 93b60a4c3d..1ed8cfb9ff 100644
--- a/libavcodec/speedhqdec.c
+++ b/libavcodec/speedhqdec.c
@@ -566,7 +566,9 @@ 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, speedhq_rl_vlc, INIT_VLC_LE);
+    ff_init_2d_vlc_rl(ff_speedhq_vlc_table, speedhq_rl_vlc, ff_rl_speedhq.table_run,
+                      ff_rl_speedhq.table_level, ff_rl_speedhq.n,
+                      FF_ARRAY_ELEMS(speedhq_rl_vlc), INIT_VLC_LE);
 
     compute_alpha_vlcs();
 }