avcodec/videotoolboxenc: don't wait when flushing data

because there is run in thread mode, few times will block
the workflow at the wait, so check the status is flushing data,
don't wait when flushing data.

Signed-off-by: Tian Qi <tianqi@kuaishou.com>
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>
Signed-off-by: Rick Kern <kernrj@gmail.com>

diff --git a/libavcodec/videotoolboxenc.c b/libavcodec/videotoolboxenc.c
index ea1384523212f86ca94644406abd6011defd42aa..a99a224bfc2ad60cf2a798ffac2eaf09be5269a0 100644 (file)
--- a/libavcodec/videotoolboxenc.c
+++ b/libavcodec/videotoolboxenc.c
@@ -294,7 +294,7 @@ static int vtenc_q_pop(VTEncContext *vtctx, bool wait, CMSampleBufferRef *buf, E
         return 0;
     }
 
-    while (!vtctx->q_head && !vtctx->async_error && wait) {
+    while (!vtctx->q_head && !vtctx->async_error && wait && !vtctx->flushing) {
         pthread_cond_wait(&vtctx->cv_sample_sent, &vtctx->lock);
     }
 
@@ -310,6 +310,7 @@ static int vtenc_q_pop(VTEncContext *vtctx, bool wait, CMSampleBufferRef *buf, E
         vtctx->q_tail = NULL;
     }
 
+    vtctx->frame_ct_out++;
     pthread_mutex_unlock(&vtctx->lock);
 
     *buf = info->cm_buffer;
@@ -321,7 +322,6 @@ static int vtenc_q_pop(VTEncContext *vtctx, bool wait, CMSampleBufferRef *buf, E
     }
     av_free(info);
 
-    vtctx->frame_ct_out++;
 
     return 0;
 }