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https://github.com/FFmpeg/FFmpeg.git
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120 lines
3.0 KiB
C
120 lines
3.0 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 library 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 of the License, or (at your option) any later version.
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*
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* This library 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 this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 CONFIG_HAVE_DLFCN
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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 HAVE_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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fprintf(stderr, "%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 errno;
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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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fprintf(stderr, "Failed to find Process entrypoint in %s\n", argv[0]);
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return -1;
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}
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if (!fhe->Configure && argc > 1) {
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fprintf(stderr, "Failed to find Configure entrypoint in %s\n", argv[0]);
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return -1;
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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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fprintf(stderr, "Failed to Configure %s\n", argv[0]);
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return -1;
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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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fprintf(stderr, "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)
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{
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if (first_hook) {
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FrameHookEntry *fhe;
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int64_t pts = av_gettime();
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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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