Merge remote-tracking branch 'qatar/master'
[ffmpeg.git] / libavcodec / mpegaudiodec.c
index 1bfccb4..69232ed 100644 (file)
@@ -1436,28 +1436,30 @@ 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 CONFIG_SAFE_BITSTREAM_READER
+#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));
-    }
-
-    for (gr = 0; gr < nb_granules; gr++) {
-        for (ch = 0; ch < s->nb_channels; ch++) {
-            g = &s->granules[ch][gr];
-            if (get_bits_count(&s->gb) < 0) {
-                av_log(s->avctx, AV_LOG_DEBUG, "mdb:%d, lastbuf:%d skipping granule %d\n",
-                       main_data_begin, s->last_buf_size, gr);
-                skip_bits_long(&s->gb, g->part2_3_length);
+        s->last_buf_size <<= 3;
+        for (gr = 0, ch = 0; gr < nb_granules && (s->last_buf_size >> 3) < main_data_begin; gr++, ch = 0) {
+            for (; ch < s->nb_channels && (s->last_buf_size >> 3) < main_data_begin; ch++) {
+                g = &s->granules[ch][gr];
+                s->last_buf_size += g->part2_3_length;
                 memset(g->sb_hybrid, 0, sizeof(g->sb_hybrid));
-                if (get_bits_count(&s->gb) >= s->gb.size_in_bits && s->in_gb.buffer) {
-                    skip_bits_long(&s->in_gb, get_bits_count(&s->gb) - s->gb.size_in_bits);
-                    s->gb           = s->in_gb;
-                    s->in_gb.buffer = NULL;
-                }
-                continue;
             }
+        }
+        skip_bits_long(&s->gb, s->last_buf_size - 8 * main_data_begin);
+        if (get_bits_count(&s->gb) >= s->gb.size_in_bits && s->in_gb.buffer) {
+            skip_bits_long(&s->in_gb, get_bits_count(&s->gb) - s->gb.size_in_bits);
+            s->gb           = s->in_gb;
+            s->in_gb.buffer = NULL;
+        }
+    } else {
+        gr = ch = 0;
+    }
 
+    for (; gr < nb_granules; gr++, ch = 0) {
+        for (; ch < s->nb_channels; ch++) {
+            g = &s->granules[ch][gr];
             bits_pos = get_bits_count(&s->gb);
 
             if (!s->lsf) {