Issue %3003 - Move ffvpx to libs/

1 files changed, 242 insertions, 0 deletions

diff --git a/libs/ffvpx/libavcodec/pthread_slice.c b/libs/ffvpx/libavcodec/pthread_slice.c
new file mode 100644
index 000000000..77cfe3c9f
--- /dev/null
+++ b/libs/ffvpx/libavcodec/pthread_slice.c
@@ -0,0 +1,242 @@
+/*
+ * 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
+ * Slice multithreading support functions
+ * @see doc/multithreading.txt
+ */
+
+#include "config.h"
+
+#include "avcodec.h"
+#include "internal.h"
+#include "pthread_internal.h"
+#include "thread.h"
+
+#include "libavutil/avassert.h"
+#include "libavutil/common.h"
+#include "libavutil/cpu.h"
+#include "libavutil/mem.h"
+#include "libavutil/thread.h"
+#include "libavutil/slicethread.h"
+
+typedef int (action_func)(AVCodecContext *c, void *arg);
+typedef int (action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr);
+typedef int (main_func)(AVCodecContext *c);
+
+typedef struct SliceThreadContext {
+    AVSliceThread *thread;
+    action_func *func;
+    action_func2 *func2;
+    main_func *mainfunc;
+    void *args;
+    int *rets;
+    int job_size;
+
+    int *entries;
+    int entries_count;
+    int thread_count;
+    pthread_cond_t *progress_cond;
+    pthread_mutex_t *progress_mutex;
+} SliceThreadContext;
+
+static void main_function(void *priv) {
+    AVCodecContext *avctx = priv;
+    SliceThreadContext *c = avctx->internal->thread_ctx;
+    c->mainfunc(avctx);
+}
+
+static void worker_func(void *priv, int jobnr, int threadnr, int nb_jobs, int nb_threads)
+{
+    AVCodecContext *avctx = priv;
+    SliceThreadContext *c = avctx->internal->thread_ctx;
+    int ret;
+
+    ret = c->func ? c->func(avctx, (char *)c->args + c->job_size * jobnr)
+                  : c->func2(avctx, c->args, jobnr, threadnr);
+    if (c->rets)
+        c->rets[jobnr] = ret;
+}
+
+void ff_slice_thread_free(AVCodecContext *avctx)
+{
+    SliceThreadContext *c = avctx->internal->thread_ctx;
+    int i;
+
+    avpriv_slicethread_free(&c->thread);
+
+    for (i = 0; i < c->thread_count; i++) {
+        pthread_mutex_destroy(&c->progress_mutex[i]);
+        pthread_cond_destroy(&c->progress_cond[i]);
+    }
+
+    av_freep(&c->entries);
+    av_freep(&c->progress_mutex);
+    av_freep(&c->progress_cond);
+    av_freep(&avctx->internal->thread_ctx);
+}
+
+static int thread_execute(AVCodecContext *avctx, action_func* func, void *arg, int *ret, int job_count, int job_size)
+{
+    SliceThreadContext *c = avctx->internal->thread_ctx;
+
+    if (!(avctx->active_thread_type&FF_THREAD_SLICE) || avctx->thread_count <= 1)
+        return avcodec_default_execute(avctx, func, arg, ret, job_count, job_size);
+
+    if (job_count <= 0)
+        return 0;
+
+    c->job_size = job_size;
+    c->args = arg;
+    c->func = func;
+    c->rets = ret;
+
+    avpriv_slicethread_execute(c->thread, job_count, !!c->mainfunc  );
+    return 0;
+}
+
+static int thread_execute2(AVCodecContext *avctx, action_func2* func2, void *arg, int *ret, int job_count)
+{
+    SliceThreadContext *c = avctx->internal->thread_ctx;
+    c->func2 = func2;
+    return thread_execute(avctx, NULL, arg, ret, job_count, 0);
+}
+
+int ff_slice_thread_execute_with_mainfunc(AVCodecContext *avctx, action_func2* func2, main_func *mainfunc, void *arg, int *ret, int job_count)
+{
+    SliceThreadContext *c = avctx->internal->thread_ctx;
+    c->func2 = func2;
+    c->mainfunc = mainfunc;
+    return thread_execute(avctx, NULL, arg, ret, job_count, 0);
+}
+
+int ff_slice_thread_init(AVCodecContext *avctx)
+{
+    SliceThreadContext *c;
+    int thread_count = avctx->thread_count;
+    static void (*mainfunc)(void *);
+
+    // We cannot do this in the encoder init as the threads are created before
+    if (av_codec_is_encoder(avctx->codec) &&
+        avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO &&
+        avctx->height > 2800)
+        thread_count = avctx->thread_count = 1;
+
+    if (!thread_count) {
+        int nb_cpus = av_cpu_count();
+        if  (avctx->height)
+            nb_cpus = FFMIN(nb_cpus, (avctx->height+15)/16);
+        // 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);
+        else
+            thread_count = avctx->thread_count = 1;
+    }
+
+    if (thread_count <= 1) {
+        avctx->active_thread_type = 0;
+        return 0;
+    }
+
+    avctx->internal->thread_ctx = c = av_mallocz(sizeof(*c));
+    mainfunc = avctx->codec->caps_internal & FF_CODEC_CAP_SLICE_THREAD_HAS_MF ? &main_function : NULL;
+    if (!c || (thread_count = avpriv_slicethread_create(&c->thread, avctx, worker_func, mainfunc, thread_count)) <= 1) {
+        if (c)
+            avpriv_slicethread_free(&c->thread);
+        av_freep(&avctx->internal->thread_ctx);
+        avctx->thread_count = 1;
+        avctx->active_thread_type = 0;
+        return 0;
+    }
+    avctx->thread_count = thread_count;
+
+    avctx->execute = thread_execute;
+    avctx->execute2 = thread_execute2;
+    return 0;
+}
+
+void ff_thread_report_progress2(AVCodecContext *avctx, int field, int thread, int n)
+{
+    SliceThreadContext *p = avctx->internal->thread_ctx;
+    int *entries = p->entries;
+
+    pthread_mutex_lock(&p->progress_mutex[thread]);
+    entries[field] +=n;
+    pthread_cond_signal(&p->progress_cond[thread]);
+    pthread_mutex_unlock(&p->progress_mutex[thread]);
+}
+
+void ff_thread_await_progress2(AVCodecContext *avctx, int field, int thread, int shift)
+{
+    SliceThreadContext *p  = avctx->internal->thread_ctx;
+    int *entries      = p->entries;
+
+    if (!entries || !field) return;
+
+    thread = thread ? thread - 1 : p->thread_count - 1;
+
+    pthread_mutex_lock(&p->progress_mutex[thread]);
+    while ((entries[field - 1] - entries[field]) < shift){
+        pthread_cond_wait(&p->progress_cond[thread], &p->progress_mutex[thread]);
+    }
+    pthread_mutex_unlock(&p->progress_mutex[thread]);
+}
+
+int ff_alloc_entries(AVCodecContext *avctx, int count)
+{
+    int i;
+
+    if (avctx->active_thread_type & FF_THREAD_SLICE)  {
+        SliceThreadContext *p = avctx->internal->thread_ctx;
+
+        if (p->entries) {
+            av_assert0(p->thread_count == avctx->thread_count);
+            av_freep(&p->entries);
+        }
+
+        p->thread_count  = avctx->thread_count;
+        p->entries       = av_mallocz_array(count, sizeof(int));
+
+        if (!p->progress_mutex) {
+            p->progress_mutex = av_malloc_array(p->thread_count, sizeof(pthread_mutex_t));
+            p->progress_cond  = av_malloc_array(p->thread_count, sizeof(pthread_cond_t));
+        }
+
+        if (!p->entries || !p->progress_mutex || !p->progress_cond) {
+            av_freep(&p->entries);
+            av_freep(&p->progress_mutex);
+            av_freep(&p->progress_cond);
+            return AVERROR(ENOMEM);
+        }
+        p->entries_count  = count;
+
+        for (i = 0; i < p->thread_count; i++) {
+            pthread_mutex_init(&p->progress_mutex[i], NULL);
+            pthread_cond_init(&p->progress_cond[i], NULL);
+        }
+    }
+
+    return 0;
+}
+
+void ff_reset_entries(AVCodecContext *avctx)
+{
+    SliceThreadContext *p = avctx->internal->thread_ctx;
+    memset(p->entries, 0, p->entries_count * sizeof(int));
+}