mss3: split DSP functions that are used in MTS2(MSS4) into separate file

4 files changed, 163 insertions, 92 deletions

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index b23bc29891..77126a672c 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -292,7 +292,7 @@ OBJS-$(CONFIG_MSMPEG4V3_ENCODER)       += msmpeg4.o msmpeg4enc.o msmpeg4data.o \
                                           h263dec.o h263.o ituh263dec.o        \
                                           mpeg4videodec.o
 OBJS-$(CONFIG_MSRLE_DECODER)           += msrle.o msrledec.o
-OBJS-$(CONFIG_MSA1_DECODER)            += mss3.o
+OBJS-$(CONFIG_MSA1_DECODER)            += mss3.o mss34dsp.o
 OBJS-$(CONFIG_MSS1_DECODER)            += mss1.o
 OBJS-$(CONFIG_MSVIDEO1_DECODER)        += msvideo1.o
 OBJS-$(CONFIG_MSZH_DECODER)            += lcldec.o
diff --git a/libavcodec/mss3.c b/libavcodec/mss3.c
index 25163c660e..7ae1b113f8 100644
--- a/libavcodec/mss3.c
+++ b/libavcodec/mss3.c
@@ -26,6 +26,7 @@
 
 #include "avcodec.h"
 #include "bytestream.h"
+#include "mss34dsp.h"
 
 #define HEADER_SIZE 27
 
@@ -119,28 +120,6 @@ typedef struct MSS3Context {
     int              hblock[16 * 16];
 } MSS3Context;
 
-static const uint8_t mss3_luma_quant[64] = {
-    16,  11,  10,  16,  24,  40,  51,  61,
-    12,  12,  14,  19,  26,  58,  60,  55,
-    14,  13,  16,  24,  40,  57,  69,  56,
-    14,  17,  22,  29,  51,  87,  80,  62,
-    18,  22,  37,  56,  68, 109, 103,  77,
-    24,  35,  55,  64,  81, 104, 113,  92,
-    49,  64,  78,  87, 103, 121, 120, 101,
-    72,  92,  95,  98, 112, 100, 103,  99
-};
-
-static const uint8_t mss3_chroma_quant[64] = {
-    17, 18, 24, 47, 99, 99, 99, 99,
-    18, 21, 26, 66, 99, 99, 99, 99,
-    24, 26, 56, 99, 99, 99, 99, 99,
-    47, 66, 99, 99, 99, 99, 99, 99,
-    99, 99, 99, 99, 99, 99, 99, 99,
-    99, 99, 99, 99, 99, 99, 99, 99,
-    99, 99, 99, 99, 99, 99, 99, 99,
-    99, 99, 99, 99, 99, 99, 99, 99
-};
-
 static const uint8_t zigzag_scan[64] = {
     0,   1,  8, 16,  9,  2,  3, 10,
     17, 24, 32, 25, 18, 11,  4,  5,
@@ -586,58 +565,6 @@ static int decode_dct(RangeCoder *c, DCTBlockCoder *bc, int *block,
     return pos == 64 ? 0 : -1;
 }
 
-#define DCT_TEMPLATE(blk, step, SOP, shift)                         \
-    const int t0 = -39409 * blk[7 * step] -  58980 * blk[1 * step]; \
-    const int t1 =  39410 * blk[1 * step] -  58980 * blk[7 * step]; \
-    const int t2 = -33410 * blk[5 * step] - 167963 * blk[3 * step]; \
-    const int t3 =  33410 * blk[3 * step] - 167963 * blk[5 * step]; \
-    const int t4 =          blk[3 * step] +          blk[7 * step]; \
-    const int t5 =          blk[1 * step] +          blk[5 * step]; \
-    const int t6 =  77062 * t4            +  51491 * t5;            \
-    const int t7 =  77062 * t5            -  51491 * t4;            \
-    const int t8 =  35470 * blk[2 * step] -  85623 * blk[6 * step]; \
-    const int t9 =  35470 * blk[6 * step] +  85623 * blk[2 * step]; \
-    const int tA = SOP(blk[0 * step] - blk[4 * step]);              \
-    const int tB = SOP(blk[0 * step] + blk[4 * step]);              \
-                                                                    \
-    blk[0 * step] = (  t1 + t6  + t9 + tB) >> shift;                \
-    blk[1 * step] = (  t3 + t7  + t8 + tA) >> shift;                \
-    blk[2 * step] = (  t2 + t6  - t8 + tA) >> shift;                \
-    blk[3 * step] = (  t0 + t7  - t9 + tB) >> shift;                \
-    blk[4 * step] = (-(t0 + t7) - t9 + tB) >> shift;                \
-    blk[5 * step] = (-(t2 + t6) - t8 + tA) >> shift;                \
-    blk[6 * step] = (-(t3 + t7) + t8 + tA) >> shift;                \
-    blk[7 * step] = (-(t1 + t6) + t9 + tB) >> shift;                \
-
-#define SOP_ROW(a) ((a) << 16) + 0x2000
-#define SOP_COL(a) ((a + 32) << 16)
-
-static void dct_put(uint8_t *dst, int stride, int *block)
-{
-    int i, j;
-    int *ptr;
-
-    ptr = block;
-    for (i = 0; i < 8; i++) {
-        DCT_TEMPLATE(ptr, 1, SOP_ROW, 13);
-        ptr += 8;
-    }
-
-    ptr = block;
-    for (i = 0; i < 8; i++) {
-        DCT_TEMPLATE(ptr, 8, SOP_COL, 22);
-        ptr++;
-    }
-
-    ptr = block;
-    for (j = 0; j < 8; j++) {
-        for (i = 0; i < 8; i++)
-            dst[i] = av_clip_uint8(ptr[i] + 128);
-        dst += stride;
-        ptr += 8;
-    }
-}
-
 static void decode_dct_block(RangeCoder *c, DCTBlockCoder *bc,
                              uint8_t *dst, int stride, int block_size,
                              int *block, int mb_x, int mb_y)
@@ -655,7 +582,7 @@ static void decode_dct_block(RangeCoder *c, DCTBlockCoder *bc,
                 c->got_error = 1;
                 return;
             }
-            dct_put(dst + i * 8, stride, block);
+            ff_mss34_dct_put(dst + i * 8, stride, block);
         }
         dst += 8 * stride;
     }
@@ -702,14 +629,6 @@ static void decode_haar_block(RangeCoder *c, HaarBlockCoder *hc,
     }
 }
 
-static void gen_quant_mat(uint16_t *qmat, const uint8_t *ref, float scale)
-{
-    int i;
-
-    for (i = 0; i < 64; i++)
-        qmat[i] = (uint16_t)(ref[i] * scale + 50.0) / 100;
-}
-
 static void reset_coders(MSS3Context *ctx, int quality)
 {
     int i, j;
@@ -726,15 +645,8 @@ static void reset_coders(MSS3Context *ctx, int quality)
         for (j = 0; j < 125; j++)
             model_reset(&ctx->image_coder[i].vq_model[j]);
         if (ctx->dct_coder[i].quality != quality) {
-            float scale;
             ctx->dct_coder[i].quality = quality;
-            if (quality > 50)
-                scale = 200.0f - 2 * quality;
-            else
-                scale = 5000.0f / quality;
-            gen_quant_mat(ctx->dct_coder[i].qmat,
-                          i ? mss3_chroma_quant : mss3_luma_quant,
-                          scale);
+            ff_mss34_gen_quant_mat(ctx->dct_coder[i].qmat, quality, !i);
         }
         memset(ctx->dct_coder[i].prev_dc, 0,
                sizeof(*ctx->dct_coder[i].prev_dc) *
diff --git a/libavcodec/mss34dsp.c b/libavcodec/mss34dsp.c
new file mode 100644
index 0000000000..11abb2de11
--- /dev/null
+++ b/libavcodec/mss34dsp.c
@@ -0,0 +1,114 @@
+/*
+ * Common stuff for some Microsoft Screen codecs
+ * Copyright (C) 2012 Konstantin Shishkov
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+#include "libavutil/common.h"
+#include "mss34dsp.h"
+
+static const uint8_t luma_quant[64] = {
+    16,  11,  10,  16,  24,  40,  51,  61,
+    12,  12,  14,  19,  26,  58,  60,  55,
+    14,  13,  16,  24,  40,  57,  69,  56,
+    14,  17,  22,  29,  51,  87,  80,  62,
+    18,  22,  37,  56,  68, 109, 103,  77,
+    24,  35,  55,  64,  81, 104, 113,  92,
+    49,  64,  78,  87, 103, 121, 120, 101,
+    72,  92,  95,  98, 112, 100, 103,  99
+};
+
+static const uint8_t chroma_quant[64] = {
+    17, 18, 24, 47, 99, 99, 99, 99,
+    18, 21, 26, 66, 99, 99, 99, 99,
+    24, 26, 56, 99, 99, 99, 99, 99,
+    47, 66, 99, 99, 99, 99, 99, 99,
+    99, 99, 99, 99, 99, 99, 99, 99,
+    99, 99, 99, 99, 99, 99, 99, 99,
+    99, 99, 99, 99, 99, 99, 99, 99,
+    99, 99, 99, 99, 99, 99, 99, 99
+};
+
+void ff_mss34_gen_quant_mat(uint16_t *qmat, int quality, int luma)
+{
+    int i;
+    const uint8_t *qsrc = luma ? luma_quant : chroma_quant;
+
+    if (quality >= 50) {
+        int scale = 200 - 2 * quality;
+
+        for (i = 0; i < 64; i++)
+            qmat[i] = (qsrc[i] * scale + 50) / 100;
+    } else {
+        for (i = 0; i < 64; i++)
+            qmat[i] = (5000 * qsrc[i] / quality + 50) / 100;
+    }
+}
+
+#define DCT_TEMPLATE(blk, step, SOP, shift)                         \
+    const int t0 = -39409 * blk[7 * step] -  58980 * blk[1 * step]; \
+    const int t1 =  39410 * blk[1 * step] -  58980 * blk[7 * step]; \
+    const int t2 = -33410 * blk[5 * step] - 167963 * blk[3 * step]; \
+    const int t3 =  33410 * blk[3 * step] - 167963 * blk[5 * step]; \
+    const int t4 =          blk[3 * step] +          blk[7 * step]; \
+    const int t5 =          blk[1 * step] +          blk[5 * step]; \
+    const int t6 =  77062 * t4            +  51491 * t5;            \
+    const int t7 =  77062 * t5            -  51491 * t4;            \
+    const int t8 =  35470 * blk[2 * step] -  85623 * blk[6 * step]; \
+    const int t9 =  35470 * blk[6 * step] +  85623 * blk[2 * step]; \
+    const int tA = SOP(blk[0 * step] - blk[4 * step]);              \
+    const int tB = SOP(blk[0 * step] + blk[4 * step]);              \
+                                                                    \
+    blk[0 * step] = (  t1 + t6  + t9 + tB) >> shift;                \
+    blk[1 * step] = (  t3 + t7  + t8 + tA) >> shift;                \
+    blk[2 * step] = (  t2 + t6  - t8 + tA) >> shift;                \
+    blk[3 * step] = (  t0 + t7  - t9 + tB) >> shift;                \
+    blk[4 * step] = (-(t0 + t7) - t9 + tB) >> shift;                \
+    blk[5 * step] = (-(t2 + t6) - t8 + tA) >> shift;                \
+    blk[6 * step] = (-(t3 + t7) + t8 + tA) >> shift;                \
+    blk[7 * step] = (-(t1 + t6) + t9 + tB) >> shift;                \
+
+#define SOP_ROW(a) ((a) << 16) + 0x2000
+#define SOP_COL(a) ((a + 32) << 16)
+
+void ff_mss34_dct_put(uint8_t *dst, int stride, int *block)
+{
+    int i, j;
+    int *ptr;
+
+    ptr = block;
+    for (i = 0; i < 8; i++) {
+        DCT_TEMPLATE(ptr, 1, SOP_ROW, 13);
+        ptr += 8;
+    }
+
+    ptr = block;
+    for (i = 0; i < 8; i++) {
+        DCT_TEMPLATE(ptr, 8, SOP_COL, 22);
+        ptr++;
+    }
+
+    ptr = block;
+    for (j = 0; j < 8; j++) {
+        for (i = 0; i < 8; i++)
+            dst[i] = av_clip_uint8(ptr[i] + 128);
+        dst += stride;
+        ptr += 8;
+    }
+}
diff --git a/libavcodec/mss34dsp.h b/libavcodec/mss34dsp.h
new file mode 100644
index 0000000000..b2cc5501ec
--- /dev/null
+++ b/libavcodec/mss34dsp.h
@@ -0,0 +1,45 @@
+/*
+ * Common stuff for some Microsoft Screen codecs
+ * Copyright (C) 2012 Konstantin Shishkov
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_MSS34DSP_H
+#define AVCODEC_MSS34DSP_H
+
+#include <stdint.h>
+
+/**
+ * Generate quantisation matrix for given quality.
+ *
+ * @param qmat    destination matrix
+ * @param quality quality setting (1-100)
+ * @param luma    generate quantisation matrix for luma or chroma
+ */
+void ff_mss34_gen_quant_mat(uint16_t *qmat, int quality, int luma);
+
+/**
+ * Transform and output DCT block.
+ *
+ * @param dst     output plane
+ * @param stride  output plane stride
+ * @param block   block to transform and output
+ */
+void ff_mss34_dct_put(uint8_t *dst, int stride, int *block);
+
+#endif /* AVCODEC_MSS34DSP_H */