Silence compiler warnings for XL decoder

[ffmpeg] / libavcodec / zmbvenc.c

diff --git a/libavcodec/zmbvenc.c b/libavcodec/zmbvenc.c
index a7a7a16da9b385176e8a0ab8171992b8af2bcc52..1bad57d958deb2ebff22e56b9c31faa49efaa820 100644 (file)
--- a/libavcodec/zmbvenc.c
+++ b/libavcodec/zmbvenc.c
@@ -17,21 +17,19 @@
  * 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
- *
  */
 
 /**
- * @file zmbvenc.c
+ * @file libavcodec/zmbvenc.c
  * Zip Motion Blocks Video encoder
  */
 
 #include <stdio.h>
 #include <stdlib.h>
 
-#include "common.h"
+#include "libavutil/intreadwrite.h"
 #include "avcodec.h"
 
-#ifdef CONFIG_ZLIB
 #include <zlib.h>
 
 #define ZMBV_KEYFRAME 1
@@ -57,6 +55,8 @@ typedef struct ZmbvEncContext {
     z_stream zstream;
 } ZmbvEncContext;
 
+static int score_tab[256];
+
 /** Block comparing function
  * XXX should be optimized and moved to DSPContext
  * TODO handle out of edge ME
@@ -65,13 +65,18 @@ static inline int block_cmp(uint8_t *src, int stride, uint8_t *src2, int stride2
 {
     int sum = 0;
     int i, j;
+    uint8_t histogram[256]={0};
 
     for(j = 0; j < bh; j++){
         for(i = 0; i < bw; i++)
-            sum += src[i] ^ src2[i];
+            histogram[src[i] ^ src2[i]]++;
         src += stride;
         src2 += stride2;
     }
+
+    for(i=1; i<256; i++)
+        sum+= score_tab[histogram[i]];
+
     return sum;
 }
 
@@ -81,17 +86,19 @@ static inline int block_cmp(uint8_t *src, int stride, uint8_t *src2, int stride2
 static int zmbv_me(ZmbvEncContext *c, uint8_t *src, int sstride, uint8_t *prev, int pstride,
                     int x, int y, int *mx, int *my)
 {
-    int dx, dy, tx, ty, tv, bv;
+    int dx, dy, tx, ty, tv, bv, bw, bh;
 
     *mx = *my = 0;
-    bv = block_cmp(src, sstride, prev, pstride, ZMBV_BLOCK, ZMBV_BLOCK);
+    bw = FFMIN(ZMBV_BLOCK, c->avctx->width - x);
+    bh = FFMIN(ZMBV_BLOCK, c->avctx->height - y);
+    bv = block_cmp(src, sstride, prev, pstride, bw, bh);
     if(!bv) return 0;
-    for(ty = FFMAX(y - c->range, 0); ty < FFMIN(y + c->range, c->avctx->height - ZMBV_BLOCK); ty++){
-        for(tx = FFMAX(x - c->range, 0); tx < FFMIN(x + c->range, c->avctx->width - ZMBV_BLOCK); tx++){
+    for(ty = FFMAX(y - c->range, 0); ty < FFMIN(y + c->range, c->avctx->height - bh); ty++){
+        for(tx = FFMAX(x - c->range, 0); tx < FFMIN(x + c->range, c->avctx->width - bw); tx++){
             if(tx == x && ty == y) continue; // we already tested this block
             dx = tx - x;
             dy = ty - y;
-            tv = block_cmp(src, sstride, prev + dx + dy*pstride, pstride, ZMBV_BLOCK, ZMBV_BLOCK);
+            tv = block_cmp(src, sstride, prev + dx + dy*pstride, pstride, bw, bh);
             if(tv < bv){
                  bv = tv;
                  *mx = dx;
@@ -105,7 +112,7 @@ static int zmbv_me(ZmbvEncContext *c, uint8_t *src, int sstride, uint8_t *prev,
 
 static int encode_frame(AVCodecContext *avctx, uint8_t *buf, int buf_size, void *data)
 {
-    ZmbvEncContext * const c = (ZmbvEncContext *)avctx->priv_data;
+    ZmbvEncContext * const c = avctx->priv_data;
     AVFrame *pict = data;
     AVFrame * const p = &c->pic;
     uint8_t *src, *prev;
@@ -144,9 +151,7 @@ static int encode_frame(AVCodecContext *avctx, uint8_t *buf, int buf_size, void
     if(chpal){
         uint8_t tpal[3];
         for(i = 0; i < 256; i++){
-            tpal[0] = palptr[i] >> 16;
-            tpal[1] = palptr[i] >>  8;
-            tpal[2] = palptr[i];
+            AV_WB24(tpal, palptr[i]);
             c->work_buf[work_size++] = tpal[0] ^ c->pal[i * 3 + 0];
             c->work_buf[work_size++] = tpal[1] ^ c->pal[i * 3 + 1];
             c->work_buf[work_size++] = tpal[2] ^ c->pal[i * 3 + 2];
@@ -158,9 +163,7 @@ static int encode_frame(AVCodecContext *avctx, uint8_t *buf, int buf_size, void
     }
     if(keyframe){
         for(i = 0; i < 256; i++){
-            c->pal[i*3 + 0] = palptr[i] >> 16;
-            c->pal[i*3 + 1] = palptr[i] >>  8;
-            c->pal[i*3 + 2] = palptr[i];
+            AV_WB24(c->pal+(i*3), palptr[i]);
         }
         memcpy(c->work_buf, c->pal, 768);
         memcpy(c->pal2, p->data[1], 1024);
@@ -236,12 +239,16 @@ static int encode_frame(AVCodecContext *avctx, uint8_t *buf, int buf_size, void
 /**
  * Init zmbv encoder
  */
-static int encode_init(AVCodecContext *avctx)
+static av_cold int encode_init(AVCodecContext *avctx)
 {
-    ZmbvEncContext * const c = (ZmbvEncContext *)avctx->priv_data;
+    ZmbvEncContext * const c = avctx->priv_data;
     int zret; // Zlib return code
+    int i;
     int lvl = 9;
 
+    for(i=1; i<256; i++)
+        score_tab[i]= -i * log(i/(double)(ZMBV_BLOCK*ZMBV_BLOCK)) * (256/M_LN2);
+
     c->avctx = avctx;
 
     c->pic.data[0] = NULL;
@@ -294,6 +301,8 @@ static int encode_init(AVCodecContext *avctx)
         return -1;
     }
 
+    avctx->coded_frame = (AVFrame*)&c->pic;
+
     return 0;
 }
 
@@ -302,9 +311,9 @@ static int encode_init(AVCodecContext *avctx)
 /**
  * Uninit zmbv encoder
  */
-static int encode_end(AVCodecContext *avctx)
+static av_cold int encode_end(AVCodecContext *avctx)
 {
-    ZmbvEncContext * const c = (ZmbvEncContext *)avctx->priv_data;
+    ZmbvEncContext * const c = avctx->priv_data;
 
     av_freep(&c->comp_buf);
     av_freep(&c->work_buf);
@@ -323,6 +332,6 @@ AVCodec zmbv_encoder = {
     encode_init,
     encode_frame,
     encode_end,
-    .pix_fmts = (enum PixelFormat[]){PIX_FMT_PAL8, -1},
+    .pix_fmts = (enum PixelFormat[]){PIX_FMT_PAL8, PIX_FMT_NONE},
+    .long_name = NULL_IF_CONFIG_SMALL("Zip Motion Blocks Video"),
 };
-#endif