dsputil: remove duplicate or unused functions.

dct_bits is never set except in h264, where it is never used, thus
remove it. Then, remove all functions that were set based on non-zero
(32) values for dct_bits. Lastly, merge 9-14 bpp functions for get_pixels
and draw_edge, which only care about pixel storage unit size, not actual
bits used (i.e. they don't clip).

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

4 files changed, 42 insertions, 87 deletions

diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index f4f84b59e1..d4259333da 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -44,19 +44,7 @@
 
 uint32_t ff_squareTbl[512] = {0, };
 
-#define BIT_DEPTH 9
-#include "dsputil_template.c"
-#undef BIT_DEPTH
-
-#define BIT_DEPTH 10
-#include "dsputil_template.c"
-#undef BIT_DEPTH
-
-#define BIT_DEPTH 12
-#include "dsputil_template.c"
-#undef BIT_DEPTH
-
-#define BIT_DEPTH 14
+#define BIT_DEPTH 16
 #include "dsputil_template.c"
 #undef BIT_DEPTH
 
@@ -2931,44 +2919,23 @@ av_cold void ff_dsputil_init(DSPContext* c, AVCodecContext *avctx)
 #define FUNC(f, depth) f ## _ ## depth
 #define FUNCC(f, depth) f ## _ ## depth ## _c
 
-#define BIT_DEPTH_FUNCS(depth, dct)\
-    c->get_pixels                    = FUNCC(get_pixels   ## dct   , depth);\
-    c->draw_edges                    = FUNCC(draw_edges            , depth);\
-    c->clear_block                   = FUNCC(clear_block  ## dct   , depth);\
-    c->clear_blocks                  = FUNCC(clear_blocks ## dct   , depth);\
+#define BIT_DEPTH_FUNCS(depth) \
+    c->get_pixels                    = FUNCC(get_pixels,   depth);\
+    c->draw_edges                    = FUNCC(draw_edges,   depth);
+
+    c->clear_block                   = FUNCC(clear_block, 8);\
+    c->clear_blocks                  = FUNCC(clear_blocks, 8);\
 
     switch (avctx->bits_per_raw_sample) {
     case 9:
-        if (c->dct_bits == 32) {
-            BIT_DEPTH_FUNCS(9, _32);
-        } else {
-            BIT_DEPTH_FUNCS(9, _16);
-        }
-        break;
     case 10:
-        if (c->dct_bits == 32) {
-            BIT_DEPTH_FUNCS(10, _32);
-        } else {
-            BIT_DEPTH_FUNCS(10, _16);
-        }
-        break;
     case 12:
-        if (c->dct_bits == 32) {
-            BIT_DEPTH_FUNCS(12, _32);
-        } else {
-            BIT_DEPTH_FUNCS(12, _16);
-        }
-        break;
     case 14:
-        if (c->dct_bits == 32) {
-            BIT_DEPTH_FUNCS(14, _32);
-        } else {
-            BIT_DEPTH_FUNCS(14, _16);
-        }
+        BIT_DEPTH_FUNCS(16);
         break;
     default:
         if(avctx->bits_per_raw_sample<=8 || avctx->codec_type != AVMEDIA_TYPE_VIDEO) {
-            BIT_DEPTH_FUNCS(8, _16);
+            BIT_DEPTH_FUNCS(8);
         }
         break;
     }
diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h
index 29a2710fee..75017caaa4 100644
--- a/libavcodec/dsputil.h
+++ b/libavcodec/dsputil.h
@@ -125,11 +125,6 @@ void ff_init_scantable_permutation(uint8_t *idct_permutation,
  * DSPContext.
  */
 typedef struct DSPContext {
-    /**
-     * Size of DCT coefficients.
-     */
-    int dct_bits;
-
     /* pixel ops : interface with DCT */
     void (*get_pixels)(int16_t *block/*align 16*/, const uint8_t *pixels/*align 8*/, int line_size);
     void (*diff_pixels)(int16_t *block/*align 16*/, const uint8_t *s1/*align 8*/, const uint8_t *s2/*align 8*/, int stride);
diff --git a/libavcodec/dsputil_template.c b/libavcodec/dsputil_template.c
index f7f4709c8f..6830ec35a7 100644
--- a/libavcodec/dsputil_template.c
+++ b/libavcodec/dsputil_template.c
@@ -65,46 +65,41 @@ static void FUNCC(draw_edges)(uint8_t *p_buf, int p_wrap, int width, int height,
             memcpy(last_line + (i + 1) * wrap, last_line, (width + w + w) * sizeof(pixel)); // bottom
 }
 
-#define DCTELEM_FUNCS(dctcoef, suffix)                                  \
-static void FUNCC(get_pixels ## suffix)(int16_t *av_restrict _block,    \
-                                        const uint8_t *_pixels,         \
-                                        int line_size)                  \
-{                                                                       \
-    const pixel *pixels = (const pixel *) _pixels;                      \
-    dctcoef *av_restrict block = (dctcoef *) _block;                    \
-    int i;                                                              \
-                                                                        \
-    /* read the pixels */                                               \
-    for(i=0;i<8;i++) {                                                  \
-        block[0] = pixels[0];                                           \
-        block[1] = pixels[1];                                           \
-        block[2] = pixels[2];                                           \
-        block[3] = pixels[3];                                           \
-        block[4] = pixels[4];                                           \
-        block[5] = pixels[5];                                           \
-        block[6] = pixels[6];                                           \
-        block[7] = pixels[7];                                           \
-        pixels += line_size / sizeof(pixel);                            \
-        block += 8;                                                     \
-    }                                                                   \
-}                                                                       \
-                                                                        \
-static void FUNCC(clear_block ## suffix)(int16_t *block)                \
-{                                                                       \
-    memset(block, 0, sizeof(dctcoef)*64);                               \
-}                                                                       \
-                                                                        \
-/**                                                                     \
- * memset(blocks, 0, sizeof(int16_t)*6*64)                              \
- */                                                                     \
-static void FUNCC(clear_blocks ## suffix)(int16_t *blocks)              \
-{                                                                       \
-    memset(blocks, 0, sizeof(dctcoef)*6*64);                            \
+static void FUNCC(get_pixels)(int16_t *av_restrict block,
+                              const uint8_t *_pixels,
+                              int line_size)
+{
+    const pixel *pixels = (const pixel *) _pixels;
+    int i;
+
+    /* read the pixels */
+    for(i=0;i<8;i++) {
+        block[0] = pixels[0];
+        block[1] = pixels[1];
+        block[2] = pixels[2];
+        block[3] = pixels[3];
+        block[4] = pixels[4];
+        block[5] = pixels[5];
+        block[6] = pixels[6];
+        block[7] = pixels[7];
+        pixels += line_size / sizeof(pixel);
+        block += 8;
+    }
 }
 
-DCTELEM_FUNCS(int16_t, _16)
-#if BIT_DEPTH > 8
-DCTELEM_FUNCS(dctcoef, _32)
+#if BIT_DEPTH == 8
+static void FUNCC(clear_block)(int16_t *block)
+{
+    memset(block, 0, sizeof(int16_t)*64);
+}
+
+/**
+ * memset(blocks, 0, sizeof(int16_t)*6*64)
+ */
+static void FUNCC(clear_blocks)(int16_t *blocks)
+{
+    memset(blocks, 0, sizeof(int16_t)*6*64);
+}
 #endif
 
 #if BIT_DEPTH == 8
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index bc8ee2eead..e8140c9450 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -1421,7 +1421,6 @@ static av_cold void common_init(H264Context *h)
     h->dequant_coeff_pps = -1;
 
     if (CONFIG_ERROR_RESILIENCE) {
-        h->dsp.dct_bits = 16;
         /* needed so that IDCT permutation is known early */
         ff_dsputil_init(&h->dsp, h->avctx);
     }
@@ -2973,7 +2972,6 @@ static int h264_set_parameter_from_sps(H264Context *h)
             ff_h264_pred_init(&h->hpc, h->avctx->codec_id, h->sps.bit_depth_luma,
                               h->sps.chroma_format_idc);
             if (CONFIG_ERROR_RESILIENCE) {
-                h->dsp.dct_bits = h->sps.bit_depth_luma > 8 ? 32 : 16;
                 ff_dsputil_init(&h->dsp, h->avctx);
             }
             ff_videodsp_init(&h->vdsp, h->sps.bit_depth_luma);