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/*
* Video processing hooks
* Copyright (c) 2000, 2001 Fabrice Bellard.
*
* 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
*/
#include <errno.h>
#include "config.h"
#include "avformat.h"
#include "framehook.h"
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#endif
typedef struct _FrameHookEntry {
struct _FrameHookEntry *next;
FrameHookConfigureFn Configure;
FrameHookProcessFn Process;
FrameHookReleaseFn Release;
void *ctx;
} FrameHookEntry;
static FrameHookEntry *first_hook;
/* Returns 0 on OK */
int frame_hook_add(int argc, char *argv[])
{
#ifdef CONFIG_VHOOK
void *loaded;
FrameHookEntry *fhe, **fhep;
if (argc < 1) {
return ENOENT;
}
loaded = dlopen(argv[0], RTLD_NOW);
if (!loaded) {
av_log(NULL, AV_LOG_ERROR, "%s\n", dlerror());
return -1;
}
fhe = av_mallocz(sizeof(*fhe));
if (!fhe) {
return AVERROR(ENOMEM);
}
fhe->Configure = dlsym(loaded, "Configure");
fhe->Process = dlsym(loaded, "Process");
fhe->Release = dlsym(loaded, "Release"); /* Optional */
if (!fhe->Process) {
av_log(NULL, AV_LOG_ERROR, "Failed to find Process entrypoint in %s\n", argv[0]);
return AVERROR(ENOENT);
}
if (!fhe->Configure && argc > 1) {
av_log(NULL, AV_LOG_ERROR, "Failed to find Configure entrypoint in %s\n", argv[0]);
return AVERROR(ENOENT);
}
if (argc > 1 || fhe->Configure) {
if (fhe->Configure(&fhe->ctx, argc, argv)) {
av_log(NULL, AV_LOG_ERROR, "Failed to Configure %s\n", argv[0]);
return AVERROR(EINVAL);
}
}
for (fhep = &first_hook; *fhep; fhep = &((*fhep)->next)) {
}
*fhep = fhe;
return 0;
#else
av_log(NULL, AV_LOG_ERROR, "Video hooking not compiled into this version\n");
return 1;
#endif
}
void frame_hook_process(AVPicture *pict, enum PixelFormat pix_fmt, int width, int height, int64_t pts)
{
if (first_hook) {
FrameHookEntry *fhe;
for (fhe = first_hook; fhe; fhe = fhe->next) {
fhe->Process(fhe->ctx, pict, pix_fmt, width, height, pts);
}
}
}
void frame_hook_release(void)
{
FrameHookEntry *fhe;
FrameHookEntry *fhenext;
for (fhe = first_hook; fhe; fhe = fhenext) {
fhenext = fhe->next;
if (fhe->Release)
fhe->Release(fhe->ctx);
av_free(fhe);
}
first_hook = NULL;
}
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