Merge remote-tracking branch 'qatar/master'

[ffmpeg] / libavcodec / pthread.c

diff --git a/libavcodec/pthread.c b/libavcodec/pthread.c
index 686994d51f4e524d8417750916d33e39b5e7ad2b..7f2ea09a74e86b9aad5c0ade7666e9abdf91a9ff 100644 (file)
--- a/libavcodec/pthread.c
+++ b/libavcodec/pthread.c
@@ -160,7 +160,7 @@ typedef struct FrameThreadContext {
  * limit the number of threads to 16 for automatic detection */
 #define MAX_AUTO_THREADS 16
 
-static int get_logical_cpus(AVCodecContext *avctx)
+int ff_get_logical_cpus(AVCodecContext *avctx)
 {
     int ret, nb_cpus = 1;
 #if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT)
@@ -303,7 +303,7 @@ static int thread_init(AVCodecContext *avctx)
     int thread_count = avctx->thread_count;
 
     if (!thread_count) {
-        int nb_cpus = get_logical_cpus(avctx);
+        int nb_cpus = ff_get_logical_cpus(avctx);
         // use number of cores + 1 as thread count if there is more than one
         if (nb_cpus > 1)
             thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
@@ -799,7 +799,7 @@ static int frame_thread_init(AVCodecContext *avctx)
     int i, err = 0;
 
     if (!thread_count) {
-        int nb_cpus = get_logical_cpus(avctx);
+        int nb_cpus = ff_get_logical_cpus(avctx);
         if ((avctx->debug & (FF_DEBUG_VIS_QP | FF_DEBUG_VIS_MB_TYPE)) || avctx->debug_mv)
             nb_cpus = 1;
         // use number of cores + 1 as thread count if there is more than one
@@ -886,8 +886,8 @@ error:
 
 void ff_thread_flush(AVCodecContext *avctx)
 {
-    FrameThreadContext *fctx = avctx->thread_opaque;
     int i;
+    FrameThreadContext *fctx = avctx->thread_opaque;
 
     if (!avctx->thread_opaque) return;
 
@@ -1051,6 +1051,11 @@ static void validate_thread_parameters(AVCodecContext *avctx)
         avctx->thread_count       = 1;
         avctx->active_thread_type = 0;
     }
+
+    if (avctx->thread_count > MAX_AUTO_THREADS)
+        av_log(avctx, AV_LOG_WARNING,
+               "Application has requested %d threads. Using a thread count greater than %d is not recommended.\n",
+               avctx->thread_count, MAX_AUTO_THREADS);
 }
 
 int ff_thread_init(AVCodecContext *avctx)