Use proper bytestream functions

Originally committed as revision 9580 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/alac.c

@@ -55,6 +55,7 @@
 
 #include "avcodec.h"
 #include "bitstream.h"
+#include "bytestream.h"
 
 #define ALAC_EXTRADATA_SIZE 36
 #define MAX_CHANNELS 2
@@ -116,22 +117,22 @@ static int alac_set_info(ALACContext *alac)
         av_log(alac->avctx, AV_LOG_ERROR, "setinfo_max_samples_per_frame too large\n");
         return -1;
     }
-    alac->setinfo_max_samples_per_frame = AV_RB32(ptr); /* buffer size / 2 ? */
-    ptr += 4;
+
+    /* buffer size / 2 ? */
+    alac->setinfo_max_samples_per_frame = bytestream_get_be32(&ptr);
     alac->setinfo_7a = *ptr++;
     alac->setinfo_sample_size = *ptr++;
     alac->setinfo_rice_historymult = *ptr++;
     alac->setinfo_rice_initialhistory = *ptr++;
     alac->setinfo_rice_kmodifier = *ptr++;
     alac->setinfo_7f = *ptr++; // channels?
-    alac->setinfo_80 = AV_RB16(ptr);
-    ptr += 2;
-    alac->setinfo_82 = AV_RB32(ptr); // max coded frame size
-    ptr += 4;
-    alac->setinfo_86 = AV_RB32(ptr); // bitrate ?
-    ptr += 4;
-    alac->setinfo_8a_rate = AV_RB32(ptr); // samplerate
-    ptr += 4;
+    alac->setinfo_80                    = bytestream_get_be16(&ptr);
+    /* max coded frame size */
+    alac->setinfo_82                    = bytestream_get_be32(&ptr);
+    /* bitrate ? */
+    alac->setinfo_86                    = bytestream_get_be32(&ptr);
+    /* samplerate */
+    alac->setinfo_8a_rate               = bytestream_get_be32(&ptr);
 
     allocate_buffers(alac);