Simplify vsad16_mmx().

[ffmpeg] / libavcodec / ulti.c

diff --git a/libavcodec/ulti.c b/libavcodec/ulti.c
index 5c6ba00114c85a1173f839697539a55eaa743c7b..01c0bf9dbc9789b6bd95a7369b913a023d984641 100644 (file)
--- a/libavcodec/ulti.c
+++ b/libavcodec/ulti.c
@@ -17,7 +17,6 @@
  * 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
- *
  */
 
 /**
@@ -31,6 +30,7 @@
 #include <unistd.h>
 
 #include "avcodec.h"
+#include "bytestream.h"
 
 #include "ulti_cb.h"
 
@@ -41,7 +41,7 @@ typedef struct UltimotionDecodeContext {
     const uint8_t *ulti_codebook;
 } UltimotionDecodeContext;
 
-static int ulti_decode_init(AVCodecContext *avctx)
+static av_cold int ulti_decode_init(AVCodecContext *avctx)
 {
     UltimotionDecodeContext *s = avctx->priv_data;
 
@@ -200,7 +200,7 @@ static void ulti_grad(AVFrame *frame, int x, int y, uint8_t *Y, int chroma, int
 
 static int ulti_decode_frame(AVCodecContext *avctx,
                              void *data, int *data_size,
-                             uint8_t *buf, int buf_size)
+                             const uint8_t *buf, int buf_size)
 {
     UltimotionDecodeContext *s=avctx->priv_data;
     int modifier = 0;
@@ -305,9 +305,7 @@ static int ulti_decode_frame(AVCodecContext *avctx,
 
                 case 2:
                     if (modifier) { // unpack four luma samples
-                        tmp = (*buf++) << 16;
-                        tmp += (*buf++) << 8;
-                        tmp += *buf++;
+                        tmp = bytestream_get_be24(&buf);
 
                         Y[0] = (tmp >> 18) & 0x3F;
                         Y[1] = (tmp >> 12) & 0x3F;
@@ -315,8 +313,7 @@ static int ulti_decode_frame(AVCodecContext *avctx,
                         Y[3] = tmp & 0x3F;
                         angle = 16;
                     } else { // retrieve luma samples from codebook
-                        tmp = (*buf++) << 8;
-                        tmp += (*buf++);
+                        tmp = bytestream_get_be16(&buf);
 
                         angle = (tmp >> 12) & 0xF;
                         tmp &= 0xFFF;
@@ -332,33 +329,25 @@ static int ulti_decode_frame(AVCodecContext *avctx,
                     if (modifier) { // all 16 luma samples
                         uint8_t Luma[16];
 
-                        tmp = (*buf++) << 16;
-                        tmp += (*buf++) << 8;
-                        tmp += *buf++;
+                        tmp = bytestream_get_be24(&buf);
                         Luma[0] = (tmp >> 18) & 0x3F;
                         Luma[1] = (tmp >> 12) & 0x3F;
                         Luma[2] = (tmp >> 6) & 0x3F;
                         Luma[3] = tmp & 0x3F;
 
-                        tmp = (*buf++) << 16;
-                        tmp += (*buf++) << 8;
-                        tmp += *buf++;
+                        tmp = bytestream_get_be24(&buf);
                         Luma[4] = (tmp >> 18) & 0x3F;
                         Luma[5] = (tmp >> 12) & 0x3F;
                         Luma[6] = (tmp >> 6) & 0x3F;
                         Luma[7] = tmp & 0x3F;
 
-                        tmp = (*buf++) << 16;
-                        tmp += (*buf++) << 8;
-                        tmp += *buf++;
+                        tmp = bytestream_get_be24(&buf);
                         Luma[8] = (tmp >> 18) & 0x3F;
                         Luma[9] = (tmp >> 12) & 0x3F;
                         Luma[10] = (tmp >> 6) & 0x3F;
                         Luma[11] = tmp & 0x3F;
 
-                        tmp = (*buf++) << 16;
-                        tmp += (*buf++) << 8;
-                        tmp += *buf++;
+                        tmp = bytestream_get_be24(&buf);
                         Luma[12] = (tmp >> 18) & 0x3F;
                         Luma[13] = (tmp >> 12) & 0x3F;
                         Luma[14] = (tmp >> 6) & 0x3F;
@@ -404,7 +393,7 @@ static int ulti_decode_frame(AVCodecContext *avctx,
     return buf_size;
 }
 
-static int ulti_decode_end(AVCodecContext *avctx)
+static av_cold int ulti_decode_end(AVCodecContext *avctx)
 {
 /*    UltimotionDecodeContext *s = avctx->priv_data;*/
 
@@ -421,6 +410,7 @@ AVCodec ulti_decoder = {
     ulti_decode_end,
     ulti_decode_frame,
     CODEC_CAP_DR1,
-    NULL
+    NULL,
+    .long_name = "IBM UltiMotion",
 };