1 files changed, 88 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/pthread.c b/media/ffvpx/libavcodec/pthread.c
new file mode 100644
index 000000000..572471586
--- /dev/null
+++ b/media/ffvpx/libavcodec/pthread.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2004 Roman Shaposhnik
+ * Copyright (c) 2008 Alexander Strange (astrange@ithinksw.com)
+ *
+ * Many thanks to Steven M. Schultz for providing clever ideas and
+ * to Michael Niedermayer <michaelni@gmx.at> for writing initial
+ * implementation.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Multithreading support functions
+ * @see doc/multithreading.txt
+ */
+
+#include "avcodec.h"
+#include "internal.h"
+#include "pthread_internal.h"
+#include "thread.h"
+
+/**
+ * Set the threading algorithms used.
+ *
+ * Threading requires more than one thread.
+ * Frame threading requires entire frames to be passed to the codec,
+ * and introduces extra decoding delay, so is incompatible with low_delay.
+ *
+ * @param avctx The context.
+ */
+static void validate_thread_parameters(AVCodecContext *avctx)
+{
+    int frame_threading_supported = (avctx->codec->capabilities & AV_CODEC_CAP_FRAME_THREADS)
+                                && !(avctx->flags  & AV_CODEC_FLAG_TRUNCATED)
+                                && !(avctx->flags  & AV_CODEC_FLAG_LOW_DELAY)
+                                && !(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS);
+    if (avctx->thread_count == 1) {
+        avctx->active_thread_type = 0;
+    } else if (frame_threading_supported && (avctx->thread_type & FF_THREAD_FRAME)) {
+        avctx->active_thread_type = FF_THREAD_FRAME;
+    } else if (avctx->codec->capabilities & AV_CODEC_CAP_SLICE_THREADS &&
+               avctx->thread_type & FF_THREAD_SLICE) {
+        avctx->active_thread_type = FF_THREAD_SLICE;
+    } else if (!(avctx->codec->capabilities & AV_CODEC_CAP_AUTO_THREADS)) {
+        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)
+{
+    validate_thread_parameters(avctx);
+
+    if (avctx->active_thread_type&FF_THREAD_SLICE)
+        return ff_slice_thread_init(avctx);
+    else if (avctx->active_thread_type&FF_THREAD_FRAME)
+        return ff_frame_thread_init(avctx);
+
+    return 0;
+}
+
+void ff_thread_free(AVCodecContext *avctx)
+{
+    if (avctx->active_thread_type&FF_THREAD_FRAME)
+        ff_frame_thread_free(avctx, avctx->thread_count);
+    else
+        ff_slice_thread_free(avctx);
+}