Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 125 insertions, 0 deletions

diff --git a/media/ffvpx/libavcodec/pthread.c b/media/ffvpx/libavcodec/pthread.c
new file mode 100644
index 0000000000..ca84b81391
--- /dev/null
+++ b/media/ffvpx/libavcodec/pthread.c
@@ -0,0 +1,125 @@
+/*
+ * 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 "libavutil/thread.h"
+
+#include "avcodec.h"
+#include "codec_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_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 (!(ffcodec(avctx->codec)->caps_internal & FF_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);
+}
+
+av_cold void ff_pthread_free(void *obj, const unsigned offsets[])
+{
+    unsigned cnt = *(unsigned*)((char*)obj + offsets[0]);
+    const unsigned *cur_offset = offsets;
+
+    *(unsigned*)((char*)obj + offsets[0]) = 0;
+
+    for (; *(++cur_offset) != THREAD_SENTINEL && cnt; cnt--)
+        pthread_mutex_destroy((pthread_mutex_t*)((char*)obj + *cur_offset));
+    for (; *(++cur_offset) != THREAD_SENTINEL && cnt; cnt--)
+        pthread_cond_destroy ((pthread_cond_t *)((char*)obj + *cur_offset));
+}
+
+av_cold int ff_pthread_init(void *obj, const unsigned offsets[])
+{
+    const unsigned *cur_offset = offsets;
+    unsigned cnt = 0;
+    int err;
+
+#define PTHREAD_INIT_LOOP(type)                                               \
+    for (; *(++cur_offset) != THREAD_SENTINEL; cnt++) {                       \
+        pthread_ ## type ## _t *dst = (void*)((char*)obj + *cur_offset);      \
+        err = pthread_ ## type ## _init(dst, NULL);                           \
+        if (err) {                                                            \
+            err = AVERROR(err);                                               \
+            goto fail;                                                        \
+        }                                                                     \
+    }
+    PTHREAD_INIT_LOOP(mutex)
+    PTHREAD_INIT_LOOP(cond)
+
+fail:
+    *(unsigned*)((char*)obj + offsets[0]) = cnt;
+    return err;
+}