From 5e1b88a019de70b93b280f263ccbd1dbd8a0dce0 Mon Sep 17 00:00:00 2001
From: reimar <reimar@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Mon, 4 Jan 2010 21:38:45 +0000
Subject: At startup and while seeking avoid to introduce pointless sleeps and
 possibly desync due to codec delay.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@30218 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 mp_core.h |  2 ++
 mplayer.c | 12 ++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/mp_core.h b/mp_core.h
index dc08bff175..5d3f86972c 100644
--- a/mp_core.h
+++ b/mp_core.h
@@ -72,6 +72,8 @@ typedef struct MPContext {
     // struct.
     int num_buffered_frames;
 
+    // used to retry decoding after startup/seeking to compensate for codec delay
+    int startup_decode_retry;
     // how long until we need to display the "current" frame
     float time_frame;
 
diff --git a/mplayer.c b/mplayer.c
index d031b0bb9a..da0ebb5671 100644
--- a/mplayer.c
+++ b/mplayer.c
@@ -203,6 +203,7 @@ static int drop_frame_cnt=0; // total number of dropped frames
 int benchmark=0;
 
 // options:
+#define DEFAULT_STARTUP_DECODE_RETRY 8
        int auto_quality=0;
 static int output_quality=0;
 
@@ -2539,6 +2540,7 @@ static int seek(MPContext *mpctx, double amount, int style)
     if (demux_seek(mpctx->demuxer, amount, audio_delay, style) == 0)
 	return -1;
 
+    mpctx->startup_decode_retry = DEFAULT_STARTUP_DECODE_RETRY;
     if (mpctx->sh_video) {
 	current_module = "seek_video_reset";
 	resync_video_stream(mpctx->sh_video);
@@ -3697,6 +3699,7 @@ total_time_usage_start=GetTimer();
 audio_time_usage=0; video_time_usage=0; vout_time_usage=0;
 total_frame_cnt=0; drop_frame_cnt=0; // fix for multifile fps benchmark
 play_n_frames=play_n_frames_mf;
+mpctx->startup_decode_retry = DEFAULT_STARTUP_DECODE_RETRY;
 
 if(play_n_frames==0){
   mpctx->eof=PT_NEXT_ENTRY; goto goto_next_file;
@@ -3769,6 +3772,15 @@ if(!mpctx->sh_video) {
 
   if (!mpctx->num_buffered_frames) {
       double frame_time = update_video(&blit_frame);
+      while (!blit_frame && mpctx->startup_decode_retry > 0) {
+          double delay = mpctx->delay;
+          // these initial decode failures are probably due to codec delay,
+          // ignore them and also their probably nonsense durations
+          update_video(&blit_frame);
+          mpctx->delay = delay;
+          mpctx->startup_decode_retry--;
+      }
+      mpctx->startup_decode_retry = 0;
       mp_dbg(MSGT_AVSYNC,MSGL_DBG2,"*** ftime=%5.3f ***\n",frame_time);
       if (mpctx->sh_video->vf_initialized < 0) {
 	  mp_msg(MSGT_CPLAYER,MSGL_FATAL, MSGTR_NotInitializeVOPorVO);
-- 
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