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Initial versions of code to all per-frame video processing in ffmpeg.
Originally committed as revision 1244 to svn://svn.ffmpeg.org/ffmpeg/trunk
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102
libav/framehook.c
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102
libav/framehook.c
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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., 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 "framehook.h"
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#include "avformat.h"
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#ifdef HAVE_VHOOK
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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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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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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 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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19
libav/framehook.h
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19
libav/framehook.h
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#ifndef _FRAMEHOOK_H
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#define _FRAMEHOOK_H
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/*
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* Prototypes for interface to .so that implement a video processing hook
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*/
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#include "avcodec.h"
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/* Function must be called 'Configure' */
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typedef int (*FrameHookConfigureFn)(void **ctxp, int argc, char *argv[]);
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/* Function must be called 'Process' */
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typedef void (*FrameHookProcessFn)(void *ctx, struct AVPicture *pict, enum PixelFormat pix_fmt, int width, int height, INT64 pts);
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extern int frame_hook_add(int argc, char *argv[]);
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extern void frame_hook_process(struct AVPicture *pict, enum PixelFormat pix_fmt, int width, int height);
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#endif
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BIN
libav/framehook.o
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BIN
libav/framehook.o
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