1 files changed, 260 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/pthread_slice.c b/media/ffvpx/libavcodec/pthread_slice.c
new file mode 100644
index 0000000000..a4d31c6f4d
--- /dev/null
+++ b/media/ffvpx/libavcodec/pthread_slice.c
@@ -0,0 +1,260 @@
+/*
+ * 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 "codec_internal.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 Progress {
+    pthread_cond_t  cond;
+    pthread_mutex_t mutex;
+} Progress;
+
+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;
+    Progress *progress;
+} 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++) {
+        Progress *const progress = &c->progress[i];
+        pthread_mutex_destroy(&progress->mutex);
+        pthread_cond_destroy(&progress->cond);
+    }
+
+    av_freep(&c->entries);
+    av_freep(&c->progress);
+    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;
+    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 = ffcodec(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;
+}
+
+int av_cold ff_slice_thread_init_progress(AVCodecContext *avctx)
+{
+    SliceThreadContext *const p = avctx->internal->thread_ctx;
+    int err, i = 0, thread_count = avctx->thread_count;
+
+    p->progress = av_calloc(thread_count, sizeof(*p->progress));
+    if (!p->progress) {
+        err = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    for (; i < thread_count; i++) {
+        Progress *const progress = &p->progress[i];
+        err = pthread_mutex_init(&progress->mutex, NULL);
+        if (err) {
+            err = AVERROR(err);
+            goto fail;
+        }
+        err = pthread_cond_init (&progress->cond,  NULL);
+        if (err) {
+            err = AVERROR(err);
+            pthread_mutex_destroy(&progress->mutex);
+            goto fail;
+        }
+    }
+    err = 0;
+fail:
+    p->thread_count = i;
+    return err;
+}
+
+void ff_thread_report_progress2(AVCodecContext *avctx, int field, int thread, int n)
+{
+    SliceThreadContext *p = avctx->internal->thread_ctx;
+    Progress *const progress = &p->progress[thread];
+    int *entries = p->entries;
+
+    pthread_mutex_lock(&progress->mutex);
+    entries[field] +=n;
+    pthread_cond_signal(&progress->cond);
+    pthread_mutex_unlock(&progress->mutex);
+}
+
+void ff_thread_await_progress2(AVCodecContext *avctx, int field, int thread, int shift)
+{
+    SliceThreadContext *p  = avctx->internal->thread_ctx;
+    Progress *progress;
+    int *entries      = p->entries;
+
+    if (!entries || !field) return;
+
+    thread = thread ? thread - 1 : p->thread_count - 1;
+    progress = &p->progress[thread];
+
+    pthread_mutex_lock(&progress->mutex);
+    while ((entries[field - 1] - entries[field]) < shift){
+        pthread_cond_wait(&progress->cond, &progress->mutex);
+    }
+    pthread_mutex_unlock(&progress->mutex);
+}
+
+int ff_slice_thread_allocz_entries(AVCodecContext *avctx, int count)
+{
+    if (avctx->active_thread_type & FF_THREAD_SLICE)  {
+        SliceThreadContext *p = avctx->internal->thread_ctx;
+
+        if (p->entries_count == count) {
+            memset(p->entries, 0, p->entries_count * sizeof(*p->entries));
+            return 0;
+        }
+        av_freep(&p->entries);
+
+        p->entries       = av_calloc(count, sizeof(*p->entries));
+        if (!p->entries) {
+            p->entries_count = 0;
+            return AVERROR(ENOMEM);
+        }
+        p->entries_count  = count;
+    }
+
+    return 0;
+}