2 * Video processing hooks
3 * Copyright (c) 2000, 2001 Fabrice Bellard.
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "framehook.h"
31 typedef struct FrameHookEntry {
32 struct FrameHookEntry *next;
33 FrameHookConfigureFn Configure;
34 FrameHookProcessFn Process;
35 FrameHookReleaseFn Release;
39 static FrameHookEntry *first_hook;
42 int frame_hook_add(int argc, char *argv[])
45 FrameHookEntry *fhe, **fhep;
51 loaded = dlopen(argv[0], RTLD_NOW);
53 av_log(NULL, AV_LOG_ERROR, "%s\n", dlerror());
57 fhe = av_mallocz(sizeof(*fhe));
59 return AVERROR(ENOMEM);
62 fhe->Configure = dlsym(loaded, "Configure");
63 fhe->Process = dlsym(loaded, "Process");
64 fhe->Release = dlsym(loaded, "Release"); /* Optional */
67 av_log(NULL, AV_LOG_ERROR, "Failed to find Process entrypoint in %s\n", argv[0]);
68 return AVERROR(ENOENT);
71 if (!fhe->Configure && argc > 1) {
72 av_log(NULL, AV_LOG_ERROR, "Failed to find Configure entrypoint in %s\n", argv[0]);
73 return AVERROR(ENOENT);
76 if (argc > 1 || fhe->Configure) {
77 if (fhe->Configure(&fhe->ctx, argc, argv)) {
78 av_log(NULL, AV_LOG_ERROR, "Failed to Configure %s\n", argv[0]);
79 return AVERROR(EINVAL);
83 for (fhep = &first_hook; *fhep; fhep = &((*fhep)->next)) {
91 void frame_hook_process(AVPicture *pict, enum PixelFormat pix_fmt, int width, int height, int64_t pts)
96 for (fhe = first_hook; fhe; fhe = fhe->next) {
97 fhe->Process(fhe->ctx, pict, pix_fmt, width, height, pts);
102 void frame_hook_release(void)
105 FrameHookEntry *fhenext;
107 for (fhe = first_hook; fhe; fhe = fhenext) {
110 fhe->Release(fhe->ctx);