Redesign packet queue full check to be more robust.

Originally committed as revision 21555 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffplay.c

@@ -49,9 +49,9 @@ const int program_birth_year = 2003;
 
 //#define DEBUG_SYNC
 
-#define MAX_VIDEOQ_SIZE (30 * 256 * 1024)
-#define MAX_AUDIOQ_SIZE (20 * 16 * 1024)
-#define MAX_SUBTITLEQ_SIZE (5 * 16 * 1024)
+#define MAX_QUEUE_SIZE (15 * 1024 * 1024)
+#define MIN_AUDIOQ_SIZE (20 * 16 * 1024)
+#define MIN_FRAMES 5
 
 /* SDL audio buffer size, in samples. Should be small to have precise
    A/V sync as SDL does not have hardware buffer fullness info. */
@@ -2026,9 +2026,10 @@ static int decode_thread(void *arg)
         }
 
         /* if the queue are full, no need to read more */
-        if (is->audioq.size > MAX_AUDIOQ_SIZE ||
-            is->videoq.size > MAX_VIDEOQ_SIZE ||
-            is->subtitleq.size > MAX_SUBTITLEQ_SIZE) {
+        if (   is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
+            || (   (is->audioq   .size  > MIN_AUDIOQ_SIZE || is->audio_stream<0)
+                && (is->videoq   .nb_packets > MIN_FRAMES || is->video_stream<0)
+                && (is->subtitleq.nb_packets > MIN_FRAMES || is->subtitle_stream<0))) {
             /* wait 10 ms */
             SDL_Delay(10);
             continue;