diff mbox series

[FFmpeg-devel,056/114] avcodec/rv40: Make better use of VLC symbols table

Message ID 20201110104851.321029-57-andreas.rheinhardt@gmail.com
State Superseded
Headers show
Series VLC, esp. init_vlc patches
Related show


Context Check Description
andriy/x86_make success Make finished
andriy/x86_make_fate success Make fate finished

Commit Message

Andreas Rheinhardt Nov. 10, 2020, 10:47 a.m. UTC
RealVideo 4.0 has a VLC that encodes two intra types per code; each
intra type is in the range 0..8 (inclusive) and up until now the VLC
used symbols in the range 0..80; one type was encoded as the remainder
when dividing the symbol by 9 whereas the other type was encoded as
symbol / 9. This is suboptimal; a better way would be to use the high
and low nibble to encode each symbol. But an even better way is to use
16bit symbols so that the two intra types can be directly written as
a 16bit value.

This commit implements this; in order to avoid huge tables the symbols
are stored as uint8_t with high and low nibbles encoding one type each;
they are only unpacked to uint16_t during initialization.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
 libavcodec/rv40.c     |  19 ++-
 libavcodec/rv40vlc2.h | 356 +++++++++++++++++++++---------------------
 2 files changed, 193 insertions(+), 182 deletions(-)
diff mbox series


diff --git a/libavcodec/rv40.c b/libavcodec/rv40.c
index 3334331658..81e08af5f1 100644
--- a/libavcodec/rv40.c
+++ b/libavcodec/rv40.c
@@ -24,6 +24,8 @@ 
  * RV40 decoder
+#include "config.h"
 #include "libavutil/imgutils.h"
 #include "avcodec.h"
@@ -71,11 +73,21 @@  static av_cold void rv40_init_tables(void)
                  aic_mode1_vlc_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
     for(i = 0; i < AIC_MODE2_NUM; i++){
+        uint16_t syms[AIC_MODE2_SIZE];
+        for (int j = 0; j < AIC_MODE2_SIZE; j++) {
+            int first  = aic_mode2_vlc_syms[i][j] >> 4;
+            int second = aic_mode2_vlc_syms[i][j] & 0xF;
+            if (HAVE_BIGENDIAN)
+                syms[j] = (first << 8) | second;
+            else
+                syms[j] = first | (second << 8);
+        }
         aic_mode2_vlc[i].table = &aic_mode2_table[mode2_offs[i]];
         aic_mode2_vlc[i].table_allocated = mode2_offs[i + 1] - mode2_offs[i];
         ff_init_vlc_from_lengths(&aic_mode2_vlc[i], AIC_MODE2_BITS, AIC_MODE2_SIZE,
                                  aic_mode2_vlc_bits[i], 1,
-                                 aic_mode2_vlc_syms[i], 1, 1, 0, INIT_VLC_USE_NEW_STATIC);
+                                 syms, 2, 2, 0, INIT_VLC_USE_NEW_STATIC);
     for(i = 0; i < NUM_PTYPE_VLCS; i++){
         ptype_vlc[i].table = &ptype_table[i << PTYPE_VLC_BITS];
@@ -194,9 +206,8 @@  static int rv40_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t
                 if(pattern == rv40_aic_table_index[k])
             if(j < 3 && k < MODE2_PATTERNS_NUM){ //pattern is found, decoding 2 coefficients
-                v = get_vlc2(gb, aic_mode2_vlc[k].table, AIC_MODE2_BITS, 2);
-                *ptr++ = v/9;
-                *ptr++ = v%9;
+                AV_WN16(ptr, get_vlc2(gb, aic_mode2_vlc[k].table, AIC_MODE2_BITS, 2));
+                ptr += 2;
                 if(B != -1 && C != -1)
diff --git a/libavcodec/rv40vlc2.h b/libavcodec/rv40vlc2.h
index 58974f6451..783b93ba2e 100644
--- a/libavcodec/rv40vlc2.h
+++ b/libavcodec/rv40vlc2.h
@@ -55,184 +55,184 @@  static const uint8_t rv40_aic_top_vlc_bits[AIC_TOP_SIZE] = {
 static const uint8_t aic_mode2_vlc_syms[AIC_MODE2_NUM][AIC_MODE2_SIZE] = {
-        0x06, 0x01, 0x1A, 0x0A, 0x14, 0x12, 0x04, 0x07, 0x05, 0x0F, 0x08, 0x36,
-        0x02, 0x3C, 0x37, 0x15, 0x0E, 0x1C, 0x18, 0x46, 0x0B, 0x09, 0x26, 0x13,
-        0x41, 0x2D, 0x50, 0x4A, 0x19, 0x16, 0x28, 0x24, 0x38, 0x32, 0x11, 0x0C,
-        0x30, 0x2F, 0x3A, 0x2A, 0x25, 0x2E, 0x2B, 0x1E, 0x1D, 0x43, 0x3D, 0x0D,
-        0x03, 0x1B, 0x17, 0x21, 0x1F, 0x29, 0x22, 0x47, 0x4D, 0x4C, 0x44, 0x42,
-        0x34, 0x4E, 0x3B, 0x35, 0x40, 0x3E, 0x3F, 0x33, 0x31, 0x10, 0x45, 0x39,
-        0x4F, 0x49, 0x48, 0x23, 0x20, 0x2C, 0x27, 0x4B, 0x00,
-    },
-    {
-        0x46, 0x38, 0x2A, 0x1E, 0x3E, 0x2F, 0x11, 0x05, 0x1C, 0x17, 0x26, 0x04,
-        0x2E, 0x28, 0x24, 0x1D, 0x32, 0x25, 0x18, 0x16, 0x1B, 0x19, 0x34, 0x21,
-        0x4C, 0x45, 0x49, 0x4B, 0x47, 0x42, 0x29, 0x4D, 0x44, 0x4E, 0x4F, 0x33,
-        0x30, 0x48, 0x3D, 0x20, 0x1F, 0x27, 0x22, 0x4A, 0x3F, 0x3B, 0x43, 0x40,
-        0x31, 0x2C, 0x39, 0x35, 0x41, 0x3A, 0x07, 0x03, 0x2B, 0x23, 0x50, 0x12,
-        0x01, 0x36, 0x1A, 0x0F, 0x02, 0x37, 0x2D, 0x0C, 0x08, 0x15, 0x10, 0x3C,
-        0x0D, 0x06, 0x13, 0x0E, 0x09, 0x00, 0x14, 0x0B, 0x0A,
-    },
-    {
-        0x09, 0x01, 0x16, 0x0B, 0x50, 0x4B, 0x3F, 0x0D, 0x08, 0x2A, 0x17, 0x4F,
-        0x28, 0x26, 0x36, 0x2D, 0x37, 0x2E, 0x40, 0x3C, 0x0E, 0x04, 0x25, 0x1E,
-        0x10, 0x03, 0x1F, 0x11, 0x4E, 0x3E, 0x3D, 0x39, 0x34, 0x44, 0x3B, 0x29,
-        0x21, 0x35, 0x31, 0x27, 0x22, 0x33, 0x30, 0x43, 0x38, 0x4D, 0x47, 0x07,
-        0x05, 0x20, 0x0C, 0x4C, 0x3A, 0x32, 0x45, 0x42, 0x2B, 0x23, 0x2F, 0x2C,
-        0x0A, 0x00, 0x13, 0x12, 0x4A, 0x1A, 0x49, 0x48, 0x1C, 0x1B, 0x24, 0x1D,
-        0x0F, 0x06, 0x18, 0x15, 0x19, 0x02, 0x46, 0x41, 0x14,
-    },
-    {
-        0x50, 0x4A, 0x2D, 0x2B, 0x43, 0x27, 0x45, 0x44, 0x3E, 0x16, 0x00, 0x22,
-        0x1B, 0x31, 0x28, 0x3A, 0x35, 0x21, 0x1F, 0x3B, 0x24, 0x06, 0x03, 0x12,
-        0x10, 0x08, 0x04, 0x2C, 0x29, 0x4F, 0x4C, 0x40, 0x4D, 0x47, 0x48, 0x42,
-        0x07, 0x4E, 0x39, 0x34, 0x3F, 0x3D, 0x46, 0x41, 0x4B, 0x49, 0x1D, 0x1A,
-        0x11, 0x05, 0x26, 0x23, 0x2F, 0x0D, 0x02, 0x17, 0x15, 0x3C, 0x33, 0x30,
-        0x38, 0x36, 0x20, 0x1E, 0x2A, 0x25, 0x13, 0x0B, 0x09, 0x01, 0x18, 0x0C,
-        0x37, 0x14, 0x0F, 0x19, 0x0E, 0x32, 0x1C, 0x2E, 0x0A,
-    },
-    {
-        0x0C, 0x09, 0x19, 0x0D, 0x3C, 0x28, 0x25, 0x30, 0x2A, 0x17, 0x11, 0x20,
-        0x1E, 0x3E, 0x39, 0x50, 0x40, 0x1F, 0x16, 0x2D, 0x2B, 0x22, 0x08, 0x2C,
-        0x29, 0x4A, 0x43, 0x3F, 0x4C, 0x45, 0x1B, 0x04, 0x34, 0x27, 0x4B, 0x47,
-        0x4E, 0x4D, 0x42, 0x07, 0x48, 0x44, 0x4F, 0x3B, 0x33, 0x03, 0x00, 0x12,
-        0x06, 0x41, 0x2F, 0x1C, 0x38, 0x36, 0x13, 0x0E, 0x2E, 0x14, 0x0F, 0x0B,
-        0x02, 0x01, 0x15, 0x10, 0x32, 0x46, 0x3A, 0x35, 0x31, 0x49, 0x3D, 0x21,
-        0x05, 0x24, 0x23, 0x1A, 0x18, 0x26, 0x1D, 0x37, 0x0A,
-    },
-    {
-        0x14, 0x0A, 0x15, 0x0C, 0x1D, 0x17, 0x41, 0x29, 0x24, 0x34, 0x2D, 0x03,
-        0x00, 0x1B, 0x08, 0x4E, 0x44, 0x48, 0x3E, 0x27, 0x04, 0x2B, 0x07, 0x2C,
-        0x3B, 0x35, 0x4D, 0x4C, 0x47, 0x3A, 0x3D, 0x39, 0x43, 0x42, 0x06, 0x05,
-        0x28, 0x22, 0x4F, 0x4B, 0x2A, 0x26, 0x31, 0x30, 0x11, 0x10, 0x21, 0x1F,
-        0x3C, 0x32, 0x23, 0x16, 0x33, 0x25, 0x02, 0x01, 0x12, 0x0D, 0x0F, 0x0B,
-        0x37, 0x19, 0x18, 0x0E, 0x1C, 0x1A, 0x13, 0x50, 0x4A, 0x38, 0x36, 0x45,
-        0x3F, 0x1E, 0x09, 0x2F, 0x20, 0x40, 0x2E, 0x49, 0x46,
-    },
-    {
-        0x0F, 0x0B, 0x37, 0x14, 0x2E, 0x13, 0x0E, 0x2F, 0x1C, 0x32, 0x49, 0x3C,
-        0x2A, 0x26, 0x38, 0x31, 0x0D, 0x01, 0x17, 0x15, 0x19, 0x0C, 0x33, 0x25,
-        0x20, 0x1E, 0x35, 0x30, 0x18, 0x09, 0x1D, 0x1A, 0x4C, 0x46, 0x27, 0x00,
-        0x3E, 0x2B, 0x4D, 0x29, 0x1F, 0x34, 0x2D, 0x05, 0x03, 0x22, 0x1B, 0x4F,
-        0x4E, 0x45, 0x08, 0x07, 0x48, 0x44, 0x3F, 0x42, 0x04, 0x47, 0x43, 0x39,
-        0x2C, 0x40, 0x3D, 0x4A, 0x3B, 0x10, 0x06, 0x16, 0x12, 0x50, 0x4B, 0x36,
-        0x28, 0x24, 0x41, 0x3A, 0x11, 0x02, 0x23, 0x21, 0x0A,
-    },
-    {
-        0x3C, 0x01, 0x0D, 0x03, 0x16, 0x15, 0x38, 0x08, 0x04, 0x20, 0x12, 0x41,
-        0x39, 0x35, 0x3F, 0x3E, 0x2C, 0x29, 0x31, 0x30, 0x18, 0x17, 0x3B, 0x28,
-        0x0C, 0x05, 0x2E, 0x25, 0x37, 0x0F, 0x0B, 0x09, 0x06, 0x1A, 0x19, 0x36,
-        0x24, 0x1D, 0x33, 0x2F, 0x10, 0x00, 0x1C, 0x11, 0x42, 0x1B, 0x44, 0x43,
-        0x50, 0x4C, 0x4B, 0x4E, 0x48, 0x4D, 0x27, 0x23, 0x4F, 0x2B, 0x45, 0x40,
-        0x2D, 0x22, 0x47, 0x34, 0x4A, 0x46, 0x3D, 0x1E, 0x07, 0x21, 0x1F, 0x49,
-        0x2A, 0x26, 0x3A, 0x32, 0x0E, 0x02, 0x14, 0x13, 0x0A,
-    },
-    {
-        0x14, 0x00, 0x0A, 0x01, 0x12, 0x08, 0x50, 0x38, 0x19, 0x02, 0x07, 0x06,
-        0x13, 0x0B, 0x1A, 0x4F, 0x3C, 0x1D, 0x1B, 0x23, 0x1E, 0x0E, 0x0D, 0x17,
-        0x10, 0x18, 0x16, 0x36, 0x26, 0x47, 0x40, 0x4C, 0x49, 0x28, 0x15, 0x2F,
-        0x2D, 0x48, 0x3F, 0x20, 0x0C, 0x2C, 0x2A, 0x4B, 0x2E, 0x24, 0x3A, 0x37,
-        0x32, 0x2B, 0x43, 0x35, 0x11, 0x03, 0x25, 0x1C, 0x42, 0x3E, 0x27, 0x21,
-        0x34, 0x29, 0x4D, 0x33, 0x31, 0x3D, 0x3B, 0x45, 0x44, 0x22, 0x1F, 0x39,
-        0x30, 0x4E, 0x46, 0x41, 0x05, 0x04, 0x0F, 0x09, 0x4A,
-    },
-    {
-        0x14, 0x0B, 0x19, 0x13, 0x0D, 0x01, 0x12, 0x0E, 0x38, 0x02, 0x00, 0x0F,
-        0x09, 0x36, 0x10, 0x41, 0x3C, 0x1A, 0x07, 0x06, 0x11, 0x0C, 0x4A, 0x32,
-        0x24, 0x47, 0x40, 0x17, 0x15, 0x1D, 0x1C, 0x26, 0x18, 0x37, 0x2F, 0x16,
-        0x08, 0x2D, 0x28, 0x46, 0x22, 0x1F, 0x39, 0x34, 0x4F, 0x4C, 0x48, 0x4E,
-        0x4B, 0x29, 0x21, 0x4D, 0x42, 0x3F, 0x3E, 0x49, 0x43, 0x1E, 0x03, 0x23,
-        0x20, 0x50, 0x33, 0x31, 0x45, 0x44, 0x2A, 0x27, 0x30, 0x2C, 0x3A, 0x2E,
-        0x35, 0x2B, 0x3D, 0x3B, 0x05, 0x04, 0x25, 0x1B, 0x0A,
-    },
-    {
-        0x28, 0x24, 0x3C, 0x36, 0x15, 0x0F, 0x1D, 0x1B, 0x07, 0x06, 0x11, 0x0D,
-        0x4E, 0x2D, 0x2B, 0x44, 0x32, 0x1E, 0x1C, 0x25, 0x20, 0x48, 0x3F, 0x4C,
-        0x4B, 0x47, 0x40, 0x4F, 0x49, 0x46, 0x0B, 0x23, 0x17, 0x2F, 0x2E, 0x08,
-        0x01, 0x10, 0x0E, 0x35, 0x31, 0x3E, 0x3D, 0x1F, 0x0C, 0x2C, 0x2A, 0x04,
-        0x03, 0x21, 0x05, 0x4D, 0x33, 0x29, 0x3B, 0x34, 0x42, 0x27, 0x22, 0x39,
-        0x30, 0x3A, 0x37, 0x45, 0x43, 0x16, 0x09, 0x38, 0x26, 0x13, 0x0A, 0x02,
-        0x00, 0x18, 0x12, 0x50, 0x1A, 0x19, 0x4A, 0x41, 0x14,
-    },
-    {
-        0x1A, 0x19, 0x40, 0x3F, 0x4F, 0x47, 0x4A, 0x14, 0x46, 0x41, 0x07, 0x01,
-        0x0D, 0x08, 0x49, 0x3C, 0x38, 0x48, 0x44, 0x24, 0x17, 0x2E, 0x2D, 0x02,
-        0x00, 0x18, 0x12, 0x26, 0x16, 0x2F, 0x28, 0x0F, 0x09, 0x15, 0x10, 0x3A,
-        0x36, 0x4E, 0x4B, 0x2A, 0x25, 0x32, 0x31, 0x2C, 0x2B, 0x35, 0x33, 0x11,
-        0x04, 0x20, 0x1C, 0x34, 0x23, 0x1F, 0x03, 0x39, 0x30, 0x3D, 0x0C, 0x05,
-        0x21, 0x1E, 0x42, 0x37, 0x27, 0x22, 0x3E, 0x3B, 0x29, 0x4D, 0x45, 0x43,
-        0x0E, 0x06, 0x1D, 0x1B, 0x4C, 0x0B, 0x0A, 0x50, 0x13,
-    },
-    {
-        0x4A, 0x19, 0x08, 0x07, 0x0F, 0x09, 0x38, 0x45, 0x43, 0x2D, 0x25, 0x4E,
-        0x3D, 0x0E, 0x0D, 0x23, 0x10, 0x24, 0x15, 0x37, 0x26, 0x0A, 0x02, 0x18,
-        0x12, 0x41, 0x46, 0x1A, 0x0B, 0x01, 0x36, 0x16, 0x50, 0x2F, 0x28, 0x44,
-        0x3A, 0x17, 0x06, 0x1D, 0x1B, 0x32, 0x2E, 0x3E, 0x35, 0x2A, 0x1E, 0x2C,
-        0x2B, 0x27, 0x22, 0x33, 0x31, 0x0C, 0x03, 0x20, 0x1F, 0x4D, 0x42, 0x3B,
-        0x39, 0x29, 0x21, 0x34, 0x30, 0x4B, 0x48, 0x05, 0x04, 0x1C, 0x11, 0x4C,
-        0x3F, 0x3C, 0x4F, 0x49, 0x13, 0x00, 0x47, 0x40, 0x14,
-    },
-    {
-        0x4C, 0x49, 0x1D, 0x17, 0x4E, 0x4B, 0x09, 0x04, 0x15, 0x0D, 0x38, 0x18,
-        0x3F, 0x3C, 0x26, 0x16, 0x3A, 0x28, 0x4F, 0x44, 0x40, 0x4D, 0x48, 0x32,
-        0x2F, 0x3D, 0x37, 0x2D, 0x2C, 0x35, 0x2E, 0x11, 0x0E, 0x23, 0x1B, 0x1E,
-        0x1C, 0x3B, 0x25, 0x05, 0x03, 0x0C, 0x08, 0x22, 0x21, 0x30, 0x27, 0x36,
-        0x42, 0x3E, 0x39, 0x34, 0x29, 0x20, 0x33, 0x31, 0x47, 0x45, 0x24, 0x1F,
-        0x2B, 0x2A, 0x06, 0x01, 0x10, 0x07, 0x46, 0x1A, 0x02, 0x00, 0x0B, 0x0A,
-        0x50, 0x41, 0x19, 0x12, 0x0F, 0x43, 0x13, 0x4A, 0x14,
-    },
-    {
-        0x46, 0x0B, 0x49, 0x47, 0x41, 0x23, 0x1E, 0x2D, 0x28, 0x15, 0x01, 0x1C,
-        0x17, 0x1F, 0x0C, 0x22, 0x20, 0x4E, 0x35, 0x32, 0x42, 0x3E, 0x27, 0x04,
-        0x31, 0x30, 0x3A, 0x2A, 0x3B, 0x39, 0x34, 0x29, 0x3D, 0x05, 0x03, 0x33,
-        0x21, 0x38, 0x2F, 0x4B, 0x3C, 0x26, 0x1D, 0x48, 0x40, 0x09, 0x08, 0x16,
-        0x0F, 0x4F, 0x11, 0x10, 0x2B, 0x25, 0x07, 0x06, 0x0E, 0x0D, 0x44, 0x43,
-        0x4D, 0x45, 0x2E, 0x2C, 0x37, 0x36, 0x24, 0x1B, 0x4C, 0x3F, 0x14, 0x4A,
-        0x1A, 0x13, 0x0A, 0x02, 0x00, 0x18, 0x12, 0x19, 0x50,
-    },
-    {
-        0x41, 0x19, 0x4F, 0x49, 0x26, 0x1E, 0x2F, 0x2D, 0x0F, 0x08, 0x1C, 0x15,
-        0x02, 0x00, 0x47, 0x12, 0x4A, 0x50, 0x1A, 0x23, 0x1D, 0x40, 0x38, 0x16,
-        0x09, 0x1B, 0x18, 0x3A, 0x37, 0x45, 0x44, 0x28, 0x11, 0x35, 0x32, 0x31,
-        0x2C, 0x29, 0x27, 0x34, 0x2A, 0x42, 0x20, 0x1F, 0x22, 0x21, 0x04, 0x03,
-        0x0C, 0x05, 0x4D, 0x3B, 0x39, 0x3E, 0x3D, 0x2B, 0x25, 0x33, 0x30, 0x3F,
-        0x36, 0x07, 0x06, 0x0E, 0x0D, 0x4C, 0x4B, 0x48, 0x3C, 0x2E, 0x4E, 0x43,
-        0x10, 0x01, 0x24, 0x17, 0x0B, 0x0A, 0x46, 0x13, 0x14,
-    },
-    {
-        0x19, 0x13, 0x50, 0x41, 0x1A, 0x0B, 0x0A, 0x4B, 0x46, 0x4A, 0x48, 0x47,
-        0x17, 0x16, 0x23, 0x1D, 0x08, 0x01, 0x11, 0x0F, 0x12, 0x02, 0x18, 0x15,
-        0x49, 0x43, 0x4E, 0x4C, 0x09, 0x00, 0x38, 0x37, 0x04, 0x03, 0x0C, 0x06,
-        0x45, 0x35, 0x2E, 0x3A, 0x36, 0x1C, 0x10, 0x25, 0x20, 0x28, 0x26, 0x3F,
-        0x3C, 0x1E, 0x0E, 0x2C, 0x24, 0x4F, 0x3B, 0x32, 0x3D, 0x39, 0x31, 0x07,
-        0x34, 0x33, 0x2A, 0x29, 0x2D, 0x2B, 0x42, 0x3E, 0x1B, 0x0D, 0x30, 0x27,
-        0x44, 0x40, 0x2F, 0x1F, 0x05, 0x22, 0x21, 0x4D, 0x14,
-    },
-    {
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