cabac: Allow hardcoding CABAC table.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

libavcodec/Makefile

@@ -874,6 +874,7 @@ TOOLS = fourcc2pixfmt
 HOSTPROGS = aac_tablegen                                                \
             aacps_tablegen                                              \
             aacsbr_tablegen                                             \
+            cabac_tablegen                                              \
             cbrt_tablegen                                               \
             cos_tablegen                                                \
             dsd_tablegen                                                \
@@ -901,7 +902,7 @@ else
 $(SUBDIR)%_tablegen$(HOSTEXESUF): HOSTCFLAGS += -DCONFIG_SMALL=0
 endif
 
-GEN_HEADERS = cbrt_tables.h aacps_tables.h aacsbr_tables.h aac_tables.h dsd_tables.h dv_tables.h     \
+GEN_HEADERS = cabac_tables.h cbrt_tables.h aacps_tables.h aacsbr_tables.h aac_tables.h dsd_tables.h dv_tables.h     \
               sinewin_tables.h mpegaudio_tables.h motionpixels_tables.h \
               pcm_tables.h qdm2_tables.h
 GEN_HEADERS := $(addprefix $(SUBDIR), $(GEN_HEADERS))
@@ -914,6 +915,7 @@ $(SUBDIR)aacdec.o: $(SUBDIR)cbrt_tables.h
 $(SUBDIR)aacps.o: $(SUBDIR)aacps_tables.h
 $(SUBDIR)aacsbr.o: $(SUBDIR)aacsbr_tables.h
 $(SUBDIR)aactab.o: $(SUBDIR)aac_tables.h
+$(SUBDIR)cabac.o: $(SUBDIR)cabac_tables.h
 $(SUBDIR)dsddec.o: $(SUBDIR)dsd_tables.h
 $(SUBDIR)dvenc.o: $(SUBDIR)dv_tables.h
 $(SUBDIR)sinewin.o: $(SUBDIR)sinewin_tables.h

libavcodec/cabac.c

@@ -32,55 +32,7 @@
 #include "cabac.h"
 #include "cabac_functions.h"
 
-uint8_t ff_h264_cabac_tables[512 + 4*2*64 + 4*64 + 63];
-
-static const uint8_t lps_range[64][4]= {
-{128,176,208,240}, {128,167,197,227}, {128,158,187,216}, {123,150,178,205},
-{116,142,169,195}, {111,135,160,185}, {105,128,152,175}, {100,122,144,166},
-{ 95,116,137,158}, { 90,110,130,150}, { 85,104,123,142}, { 81, 99,117,135},
-{ 77, 94,111,128}, { 73, 89,105,122}, { 69, 85,100,116}, { 66, 80, 95,110},
-{ 62, 76, 90,104}, { 59, 72, 86, 99}, { 56, 69, 81, 94}, { 53, 65, 77, 89},
-{ 51, 62, 73, 85}, { 48, 59, 69, 80}, { 46, 56, 66, 76}, { 43, 53, 63, 72},
-{ 41, 50, 59, 69}, { 39, 48, 56, 65}, { 37, 45, 54, 62}, { 35, 43, 51, 59},
-{ 33, 41, 48, 56}, { 32, 39, 46, 53}, { 30, 37, 43, 50}, { 29, 35, 41, 48},
-{ 27, 33, 39, 45}, { 26, 31, 37, 43}, { 24, 30, 35, 41}, { 23, 28, 33, 39},
-{ 22, 27, 32, 37}, { 21, 26, 30, 35}, { 20, 24, 29, 33}, { 19, 23, 27, 31},
-{ 18, 22, 26, 30}, { 17, 21, 25, 28}, { 16, 20, 23, 27}, { 15, 19, 22, 25},
-{ 14, 18, 21, 24}, { 14, 17, 20, 23}, { 13, 16, 19, 22}, { 12, 15, 18, 21},
-{ 12, 14, 17, 20}, { 11, 14, 16, 19}, { 11, 13, 15, 18}, { 10, 12, 15, 17},
-{ 10, 12, 14, 16}, {  9, 11, 13, 15}, {  9, 11, 12, 14}, {  8, 10, 12, 14},
-{  8,  9, 11, 13}, {  7,  9, 11, 12}, {  7,  9, 10, 12}, {  7,  8, 10, 11},
-{  6,  8,  9, 11}, {  6,  7,  9, 10}, {  6,  7,  8,  9}, {  2,  2,  2,  2},
-};
-
-static const uint8_t mps_state[64]= {
-  1, 2, 3, 4, 5, 6, 7, 8,
-  9,10,11,12,13,14,15,16,
- 17,18,19,20,21,22,23,24,
- 25,26,27,28,29,30,31,32,
- 33,34,35,36,37,38,39,40,
- 41,42,43,44,45,46,47,48,
- 49,50,51,52,53,54,55,56,
- 57,58,59,60,61,62,62,63,
-};
-
-static const uint8_t lps_state[64]= {
-  0, 0, 1, 2, 2, 4, 4, 5,
-  6, 7, 8, 9, 9,11,11,12,
- 13,13,15,15,16,16,18,18,
- 19,19,21,21,22,22,23,24,
- 24,25,26,26,27,27,28,29,
- 29,30,30,30,31,32,32,33,
- 33,33,34,34,35,35,35,36,
- 36,36,37,37,37,38,38,63,
-};
-
-static const uint8_t last_coeff_flag_offset_8x8[63] = {
- 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
- 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8
-};
+#include "cabac_tablegen.h"
 
 /**
  *
@@ -116,34 +68,12 @@ void ff_init_cabac_decoder(CABACContext *c, const uint8_t *buf, int buf_size){
 
 void ff_init_cabac_states(void)
 {
-    int i, j;
     static int initialized = 0;
 
     if (initialized)
         return;
 
-    for (i = 0; i < 512; i++)
-        ff_h264_norm_shift[i] = i ? 8 - av_log2(i) : 9;
-
-    for(i=0; i<64; i++){
-        for(j=0; j<4; j++){ //FIXME check if this is worth the 1 shift we save
-            ff_h264_lps_range[j*2*64+2*i+0]=
-            ff_h264_lps_range[j*2*64+2*i+1]= lps_range[i][j];
-        }
-        ff_h264_mlps_state[128 + 2 * i + 0] = 2 * mps_state[i] + 0;
-        ff_h264_mlps_state[128 + 2 * i + 1] = 2 * mps_state[i] + 1;
-
-        if( i ){
-            ff_h264_mlps_state[128-2*i-1]= 2*lps_state[i]+0;
-            ff_h264_mlps_state[128-2*i-2]= 2*lps_state[i]+1;
-        }else{
-            ff_h264_mlps_state[128-2*i-1]= 1;
-            ff_h264_mlps_state[128-2*i-2]= 0;
-        }
-    }
-    for(i=0; i< 63; i++){
-      ff_h264_last_coeff_flag_offset_8x8[i] = last_coeff_flag_offset_8x8[i];
-    }
+    cabac_tableinit();
 
     initialized = 1;
 }

libavcodec/cabac.h

@@ -31,7 +31,12 @@
 
 #include "put_bits.h"
 
-extern uint8_t ff_h264_cabac_tables[512 + 4*2*64 + 4*64 + 63];
+#if CONFIG_HARDCODED_TABLES
+#define CABAC_TABLE_CONST const
+#else
+#define CABAC_TABLE_CONST
+#endif
+extern CABAC_TABLE_CONST uint8_t ff_h264_cabac_tables[512 + 4*2*64 + 4*64 + 63];
 #define H264_NORM_SHIFT_OFFSET 0
 #define H264_LPS_RANGE_OFFSET 512
 #define H264_MLPS_STATE_OFFSET 1024

libavcodec/cabac_functions.h

@@ -42,10 +42,10 @@
 #   include "x86/cabac.h"
 #endif
 
-static uint8_t * const ff_h264_norm_shift = ff_h264_cabac_tables + H264_NORM_SHIFT_OFFSET;
-static uint8_t * const ff_h264_lps_range = ff_h264_cabac_tables + H264_LPS_RANGE_OFFSET;
-static uint8_t * const ff_h264_mlps_state = ff_h264_cabac_tables + H264_MLPS_STATE_OFFSET;
-static uint8_t * const ff_h264_last_coeff_flag_offset_8x8 = ff_h264_cabac_tables + H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET;
+static CABAC_TABLE_CONST uint8_t * const ff_h264_norm_shift = ff_h264_cabac_tables + H264_NORM_SHIFT_OFFSET;
+static CABAC_TABLE_CONST uint8_t * const ff_h264_lps_range = ff_h264_cabac_tables + H264_LPS_RANGE_OFFSET;
+static CABAC_TABLE_CONST uint8_t * const ff_h264_mlps_state = ff_h264_cabac_tables + H264_MLPS_STATE_OFFSET;
+static CABAC_TABLE_CONST uint8_t * const ff_h264_last_coeff_flag_offset_8x8 = ff_h264_cabac_tables + H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET;
 
 static void refill(CABACContext *c){
 #if CABAC_BITS == 16

libavcodec/cabac_tablegen.c

@@ -0,0 +1,41 @@
+/*
+ * Header file for hardcoded AAC SBR windows
+ *
+ * Copyright (c) 2014 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdlib.h>
+#include "libavutil/common.h"
+#include "cabac_functions.h"
+#undef CONFIG_HARDCODED_TABLES
+#define CONFIG_HARDCODED_TABLES 0
+av_const int av_log2(unsigned v) { int r = 0; while (v >>= 1) r++; return r; }
+#include "cabac_tablegen.h"
+#include "tableprint.h"
+
+int main(void)
+{
+    cabac_tableinit();
+
+    write_fileheader();
+
+    WRITE_ARRAY("const", uint8_t, ff_h264_cabac_tables);
+
+    return 0;
+}

libavcodec/cabac_tablegen.h

@@ -0,0 +1,108 @@
+/*
+ * Header file for hardcoded CABAC table
+ *
+ * Copyright (c) 2014 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_CABAC_TABLEGEN_H
+#define AVCODEC_CABAC_TABLEGEN_H
+
+#if CONFIG_HARDCODED_TABLES
+#define cabac_tableinit()
+#include "libavcodec/cabac_tables.h"
+#else
+uint8_t ff_h264_cabac_tables[512 + 4*2*64 + 4*64 + 63];
+
+static const uint8_t lps_range[64][4]= {
+{128,176,208,240}, {128,167,197,227}, {128,158,187,216}, {123,150,178,205},
+{116,142,169,195}, {111,135,160,185}, {105,128,152,175}, {100,122,144,166},
+{ 95,116,137,158}, { 90,110,130,150}, { 85,104,123,142}, { 81, 99,117,135},
+{ 77, 94,111,128}, { 73, 89,105,122}, { 69, 85,100,116}, { 66, 80, 95,110},
+{ 62, 76, 90,104}, { 59, 72, 86, 99}, { 56, 69, 81, 94}, { 53, 65, 77, 89},
+{ 51, 62, 73, 85}, { 48, 59, 69, 80}, { 46, 56, 66, 76}, { 43, 53, 63, 72},
+{ 41, 50, 59, 69}, { 39, 48, 56, 65}, { 37, 45, 54, 62}, { 35, 43, 51, 59},
+{ 33, 41, 48, 56}, { 32, 39, 46, 53}, { 30, 37, 43, 50}, { 29, 35, 41, 48},
+{ 27, 33, 39, 45}, { 26, 31, 37, 43}, { 24, 30, 35, 41}, { 23, 28, 33, 39},
+{ 22, 27, 32, 37}, { 21, 26, 30, 35}, { 20, 24, 29, 33}, { 19, 23, 27, 31},
+{ 18, 22, 26, 30}, { 17, 21, 25, 28}, { 16, 20, 23, 27}, { 15, 19, 22, 25},
+{ 14, 18, 21, 24}, { 14, 17, 20, 23}, { 13, 16, 19, 22}, { 12, 15, 18, 21},
+{ 12, 14, 17, 20}, { 11, 14, 16, 19}, { 11, 13, 15, 18}, { 10, 12, 15, 17},
+{ 10, 12, 14, 16}, {  9, 11, 13, 15}, {  9, 11, 12, 14}, {  8, 10, 12, 14},
+{  8,  9, 11, 13}, {  7,  9, 11, 12}, {  7,  9, 10, 12}, {  7,  8, 10, 11},
+{  6,  8,  9, 11}, {  6,  7,  9, 10}, {  6,  7,  8,  9}, {  2,  2,  2,  2},
+};
+
+static const uint8_t mps_state[64]= {
+  1, 2, 3, 4, 5, 6, 7, 8,
+  9,10,11,12,13,14,15,16,
+ 17,18,19,20,21,22,23,24,
+ 25,26,27,28,29,30,31,32,
+ 33,34,35,36,37,38,39,40,
+ 41,42,43,44,45,46,47,48,
+ 49,50,51,52,53,54,55,56,
+ 57,58,59,60,61,62,62,63,
+};
+
+static const uint8_t lps_state[64]= {
+  0, 0, 1, 2, 2, 4, 4, 5,
+  6, 7, 8, 9, 9,11,11,12,
+ 13,13,15,15,16,16,18,18,
+ 19,19,21,21,22,22,23,24,
+ 24,25,26,26,27,27,28,29,
+ 29,30,30,30,31,32,32,33,
+ 33,33,34,34,35,35,35,36,
+ 36,36,37,37,37,38,38,63,
+};
+
+static const uint8_t last_coeff_flag_offset_8x8[63] = {
+ 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
+ 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8
+};
+
+static av_cold void cabac_tableinit(void)
+{
+    int i, j;
+    for (i = 0; i < 512; i++)
+        ff_h264_norm_shift[i] = i ? 8 - av_log2(i) : 9;
+
+    for(i=0; i<64; i++){
+        for(j=0; j<4; j++){ //FIXME check if this is worth the 1 shift we save
+            ff_h264_lps_range[j*2*64+2*i+0]=
+            ff_h264_lps_range[j*2*64+2*i+1]= lps_range[i][j];
+        }
+        ff_h264_mlps_state[128 + 2 * i + 0] = 2 * mps_state[i] + 0;
+        ff_h264_mlps_state[128 + 2 * i + 1] = 2 * mps_state[i] + 1;
+
+        if( i ){
+            ff_h264_mlps_state[128-2*i-1]= 2*lps_state[i]+0;
+            ff_h264_mlps_state[128-2*i-2]= 2*lps_state[i]+1;
+        }else{
+            ff_h264_mlps_state[128-2*i-1]= 1;
+            ff_h264_mlps_state[128-2*i-2]= 0;
+        }
+    }
+    for(i=0; i< 63; i++){
+      ff_h264_last_coeff_flag_offset_8x8[i] = last_coeff_flag_offset_8x8[i];
+    }
+}
+#endif /* CONFIG_HARDCODED_TABLES */
+
+#endif /* AVCODEC_CABAC_TABLEGEN_H */