/* * Video processing hooks * Copyright (c) 2000, 2001 Fabrice Bellard. * * This library 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 of the License, or (at your option) any later version. * * This library 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 this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <errno.h> #include "config.h" #include "avformat.h" #include "framehook.h" #ifdef CONFIG_HAVE_DLFCN #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 HAVE_VHOOK void *loaded; FrameHookEntry *fhe, **fhep; if (argc < 1) { return ENOENT; } loaded = dlopen(argv[0], RTLD_NOW); if (!loaded) { fprintf(stderr, "%s\n", dlerror()); return -1; } fhe = av_mallocz(sizeof(*fhe)); if (!fhe) { return errno; } fhe->Configure = dlsym(loaded, "Configure"); fhe->Process = dlsym(loaded, "Process"); fhe->Release = dlsym(loaded, "Release"); /* Optional */ if (!fhe->Process) { fprintf(stderr, "Failed to find Process entrypoint in %s\n", argv[0]); return -1; } if (!fhe->Configure && argc > 1) { fprintf(stderr, "Failed to find Configure entrypoint in %s\n", argv[0]); return -1; } if (argc > 1 || fhe->Configure) { if (fhe->Configure(&fhe->ctx, argc, argv)) { fprintf(stderr, "Failed to Configure %s\n", argv[0]); return -1; } } for (fhep = &first_hook; *fhep; fhep = &((*fhep)->next)) { } *fhep = fhe; return 0; #else fprintf(stderr, "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) { if (first_hook) { FrameHookEntry *fhe; int64_t pts = av_gettime(); 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; }