Start working on a branch where FFmpeg is not copied, patched and carved to be built with automake but instead imported inline and built using its own build system. This is an import of a slightly modified FFmpeg current tree. xine-lib builds, install and run fine with it, but there are of course plenty of things that needs to be fixed before it can even be considered for a 1.2.x series. Work will continue in the next days of course.

CVS patchset: 8397
CVS date: 2006/12/02 01:19:48

1 files changed, 182 insertions, 0 deletions

diff --git a/contrib/ffmpeg/libavcodec/beosthread.c b/contrib/ffmpeg/libavcodec/beosthread.c
new file mode 100644
index 000000000..3d059912b
--- /dev/null
+++ b/contrib/ffmpeg/libavcodec/beosthread.c
@@ -0,0 +1,182 @@
+/*
+ * Copyright (c) 2004 François Revol <revol@free.fr>
+ *
+ * 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
+ *
+ */
+//#define DEBUG
+
+#include "avcodec.h"
+#include "common.h"
+
+#include <OS.h>
+
+typedef struct ThreadContext{
+    AVCodecContext *avctx;
+    thread_id thread;
+    sem_id work_sem;
+    sem_id done_sem;
+    int (*func)(AVCodecContext *c, void *arg);
+    void *arg;
+    int ret;
+}ThreadContext;
+
+// it's odd Be never patented that :D
+struct benaphore {
+        vint32 atom;
+        sem_id sem;
+};
+static inline int lock_ben(struct benaphore *ben)
+{
+        if (atomic_add(&ben->atom, 1) > 0)
+                return acquire_sem(ben->sem);
+        return B_OK;
+}
+static inline int unlock_ben(struct benaphore *ben)
+{
+        if (atomic_add(&ben->atom, -1) > 1)
+                return release_sem(ben->sem);
+        return B_OK;
+}
+
+static struct benaphore av_thread_lib_ben;
+
+static int32 ff_thread_func(void *v){
+    ThreadContext *c= v;
+
+    for(;;){
+//printf("thread_func %X enter wait\n", (int)v); fflush(stdout);
+        acquire_sem(c->work_sem);
+//printf("thread_func %X after wait (func=%X)\n", (int)v, (int)c->func); fflush(stdout);
+        if(c->func)
+            c->ret= c->func(c->avctx, c->arg);
+        else
+            return 0;
+//printf("thread_func %X signal complete\n", (int)v); fflush(stdout);
+        release_sem(c->done_sem);
+    }
+
+    return B_OK;
+}
+
+/**
+ * free what has been allocated by avcodec_thread_init().
+ * must be called after decoding has finished, especially dont call while avcodec_thread_execute() is running
+ */
+void avcodec_thread_free(AVCodecContext *s){
+    ThreadContext *c= s->thread_opaque;
+    int i;
+    int32 ret;
+
+    for(i=0; i<s->thread_count; i++){
+
+        c[i].func= NULL;
+        release_sem(c[i].work_sem);
+        wait_for_thread(c[i].thread, &ret);
+        if(c[i].work_sem > B_OK) delete_sem(c[i].work_sem);
+        if(c[i].done_sem > B_OK) delete_sem(c[i].done_sem);
+    }
+
+    av_freep(&s->thread_opaque);
+}
+
+int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){
+    ThreadContext *c= s->thread_opaque;
+    int i;
+
+    assert(s == c->avctx);
+    assert(count <= s->thread_count);
+
+    /* note, we can be certain that this is not called with the same AVCodecContext by different threads at the same time */
+
+    for(i=0; i<count; i++){
+        c[i].arg= arg[i];
+        c[i].func= func;
+        c[i].ret= 12345;
+
+        release_sem(c[i].work_sem);
+    }
+    for(i=0; i<count; i++){
+        acquire_sem(c[i].done_sem);
+
+        c[i].func= NULL;
+        if(ret) ret[i]= c[i].ret;
+    }
+    return 0;
+}
+
+int avcodec_thread_init(AVCodecContext *s, int thread_count){
+    int i;
+    ThreadContext *c;
+
+    s->thread_count= thread_count;
+
+    assert(!s->thread_opaque);
+    c= av_mallocz(sizeof(ThreadContext)*thread_count);
+    s->thread_opaque= c;
+
+    for(i=0; i<thread_count; i++){
+//printf("init semaphors %d\n", i); fflush(stdout);
+        c[i].avctx= s;
+
+        if((c[i].work_sem = create_sem(0, "ff work sem")) < B_OK)
+            goto fail;
+        if((c[i].done_sem = create_sem(0, "ff done sem")) < B_OK)
+            goto fail;
+
+//printf("create thread %d\n", i); fflush(stdout);
+        c[i].thread = spawn_thread(ff_thread_func, "libavcodec thread", B_LOW_PRIORITY, &c[i] );
+        if( c[i].thread < B_OK ) goto fail;
+        resume_thread(c[i].thread );
+    }
+//printf("init done\n"); fflush(stdout);
+
+    s->execute= avcodec_thread_execute;
+
+    return 0;
+fail:
+    avcodec_thread_free(s);
+    return -1;
+}
+
+/* provide a mean to serialize calls to avcodec_*() for thread safety. */
+
+int avcodec_thread_lock_lib(void)
+{
+        return lock_ben(&av_thread_lib_ben);
+}
+
+int avcodec_thread_unlock_lib(void)
+{
+        return unlock_ben(&av_thread_lib_ben);
+}
+
+/* our versions of _init and _fini (which are called by those actually from crt.o) */
+
+void initialize_after(void)
+{
+        av_thread_lib_ben.atom = 0;
+        av_thread_lib_ben.sem = create_sem(0, "libavcodec benaphore");
+}
+
+void uninitialize_before(void)
+{
+        delete_sem(av_thread_lib_ben.sem);
+}
+
+
+