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https://github.com/FFmpeg/FFmpeg.git
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4992d8bf7d
current time of day, which is useless, and which the filters could just as easily query for themselves. patch by Bobby Bingham, uhmmmm gmail com Originally committed as revision 8541 to svn://svn.ffmpeg.org/ffmpeg/trunk
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/*
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* Video processing hooks
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* Copyright (c) 2000, 2001 Fabrice Bellard.
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <errno.h>
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#include "config.h"
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#include "avformat.h"
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#include "framehook.h"
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#ifdef HAVE_DLFCN_H
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#include <dlfcn.h>
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#endif
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typedef struct _FrameHookEntry {
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struct _FrameHookEntry *next;
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FrameHookConfigureFn Configure;
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FrameHookProcessFn Process;
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FrameHookReleaseFn Release;
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void *ctx;
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} FrameHookEntry;
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static FrameHookEntry *first_hook;
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/* Returns 0 on OK */
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int frame_hook_add(int argc, char *argv[])
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{
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#ifdef CONFIG_VHOOK
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void *loaded;
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FrameHookEntry *fhe, **fhep;
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if (argc < 1) {
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return ENOENT;
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}
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loaded = dlopen(argv[0], RTLD_NOW);
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if (!loaded) {
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av_log(NULL, AV_LOG_ERROR, "%s\n", dlerror());
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return -1;
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}
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fhe = av_mallocz(sizeof(*fhe));
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if (!fhe) {
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return AVERROR(ENOMEM);
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}
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fhe->Configure = dlsym(loaded, "Configure");
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fhe->Process = dlsym(loaded, "Process");
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fhe->Release = dlsym(loaded, "Release"); /* Optional */
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if (!fhe->Process) {
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av_log(NULL, AV_LOG_ERROR, "Failed to find Process entrypoint in %s\n", argv[0]);
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return AVERROR(ENOENT);
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}
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if (!fhe->Configure && argc > 1) {
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av_log(NULL, AV_LOG_ERROR, "Failed to find Configure entrypoint in %s\n", argv[0]);
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return AVERROR(ENOENT);
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}
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if (argc > 1 || fhe->Configure) {
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if (fhe->Configure(&fhe->ctx, argc, argv)) {
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av_log(NULL, AV_LOG_ERROR, "Failed to Configure %s\n", argv[0]);
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return AVERROR(EINVAL);
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}
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}
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for (fhep = &first_hook; *fhep; fhep = &((*fhep)->next)) {
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}
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*fhep = fhe;
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return 0;
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#else
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av_log(NULL, AV_LOG_ERROR, "Video hooking not compiled into this version\n");
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return 1;
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#endif
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}
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void frame_hook_process(AVPicture *pict, enum PixelFormat pix_fmt, int width, int height, int64_t pts)
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{
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if (first_hook) {
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FrameHookEntry *fhe;
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for (fhe = first_hook; fhe; fhe = fhe->next) {
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fhe->Process(fhe->ctx, pict, pix_fmt, width, height, pts);
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}
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}
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}
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void frame_hook_release(void)
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{
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FrameHookEntry *fhe;
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FrameHookEntry *fhenext;
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for (fhe = first_hook; fhe; fhe = fhenext) {
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fhenext = fhe->next;
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if (fhe->Release)
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fhe->Release(fhe->ctx);
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av_free(fhe);
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}
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first_hook = NULL;
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}
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