fix 24bit flac support, revised from Thibaut Mattern <thibaut.mattern@gmail.com>

[ffmpeg] / libavcodec / h264idct.c

diff --git a/libavcodec/h264idct.c b/libavcodec/h264idct.c
index 649fcc48058cf8eeb54f6b7acf7550db50b05a51..3e44385d5ead65583f3a3a53c21e606b9dba357c 100644 (file)
--- a/libavcodec/h264idct.c
+++ b/libavcodec/h264idct.c
@@ -14,7 +14,7 @@
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  *
  */
 
@@ -139,3 +139,28 @@ void ff_h264_idct8_add_c(uint8_t *dst, DCTELEM *block, int stride){
         dst[i + 7*stride] = cm[ dst[i + 7*stride] + ((b0 - b7) >> 6) ];
     }
 }
+
+// assumes all AC coefs are 0
+void ff_h264_idct_dc_add_c(uint8_t *dst, DCTELEM *block, int stride){
+    int i, j;
+    uint8_t *cm = cropTbl + MAX_NEG_CROP;
+    int dc = (block[0] + 32) >> 6;
+    for( j = 0; j < 4; j++ )
+    {
+        for( i = 0; i < 4; i++ )
+            dst[i] = cm[ dst[i] + dc ];
+        dst += stride;
+    }
+}
+
+void ff_h264_idct8_dc_add_c(uint8_t *dst, DCTELEM *block, int stride){
+    int i, j;
+    uint8_t *cm = cropTbl + MAX_NEG_CROP;
+    int dc = (block[0] + 32) >> 6;
+    for( j = 0; j < 8; j++ )
+    {
+        for( i = 0; i < 8; i++ )
+            dst[i] = cm[ dst[i] + dc ];
+        dst += stride;
+    }
+}