sgidec: make compiler optimize away memcpy call in inner loop.

[ffmpeg] / libavcodec / mpegaudiodec.c

diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c
index 5cc3c74339d7d4537612bd907f15f9900da5f75e..eae030ce44cb48895689b6c2a0c3bbcf3b7dd904 100644 (file)
--- a/libavcodec/mpegaudiodec.c
+++ b/libavcodec/mpegaudiodec.c
@@ -24,6 +24,8 @@
  * MPEG Audio decoder
  */
 
+#define UNCHECKED_BITSTREAM_READER 1
+
 #include "libavutil/audioconvert.h"
 #include "avcodec.h"
 #include "get_bits.h"
@@ -1425,6 +1427,7 @@ static int mp_decode_layer3(MPADecodeContext *s)
     }
 
     if (!s->adu_mode) {
+        int skip;
         const uint8_t *ptr = s->gb.buffer + (get_bits_count(&s->gb)>>3);
         assert((get_bits_count(&s->gb) & 7) == 0);
         /* now we get bits from the main_data_begin offset */
@@ -1434,6 +1437,9 @@ static int mp_decode_layer3(MPADecodeContext *s)
         memcpy(s->last_buf + s->last_buf_size, ptr, EXTRABYTES);
         s->in_gb = s->gb;
         init_get_bits(&s->gb, s->last_buf, s->last_buf_size*8);
+#if !UNCHECKED_BITSTREAM_READER
+        s->gb.size_in_bits_plus8 += EXTRABYTES * 8;
+#endif
         skip_bits_long(&s->gb, 8*(s->last_buf_size - main_data_begin));
     }