ffmpeg / libavformat / framehook.c @ 5509bffa
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/*
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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., 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 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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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 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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av_log(NULL, AV_LOG_ERROR, "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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av_log(NULL, AV_LOG_ERROR, "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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av_log(NULL, AV_LOG_ERROR, "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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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) |
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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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} |