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Diffstat (limited to 'libmpcodecs/vf_framestep.c')
| -rw-r--r-- | libmpcodecs/vf_framestep.c | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/libmpcodecs/vf_framestep.c b/libmpcodecs/vf_framestep.c deleted file mode 100644 index d6aad9a90a..0000000000 --- a/libmpcodecs/vf_framestep.c +++ /dev/null @@ -1,203 +0,0 @@ -/* - * filter to ouput only 1 every n frame, or only the I (key)frame - * - * The parameters are: - * - * [I] | [i]num - * - * if you call the filter with I (uppercase) as the parameter - * ... -vf framestep=I ... - * then ONLY the keyframes are outputted. - * For DVD it means, generally, one every 15 frames (IBBPBBPBBPBBPBB), for avi it means - * every scene change or every keyint value (see -lavcopts). - * - * if you call the filter with the i (lowercase) - * ... -vf framestep=i ... - * then a I! followed by a cr is printed when a key frame (eg Intra frame) is - * found, leaving the current line of mplayer, where you got the time, in - * seconds, and frame of the key. Use this information to split the AVI. - * - * After the i or alone you can put a positive number and only one frame every - * x (the number you set) is passed on the filter chain, limiting the output - * of the frame. - * - * Example - * ... -vf framestep=i20 ... - * Dump one every 20 frames, printing on the console when a I-Frame is encounter. - * - * ... -vf framestep=25 - * Dump one every 25 frames. - * - * If you call the filter without parameter it does nothing (except using memory - * and resource of your system,. of course). - * - * This filter doesn' t work like the option -sstep seconds. - * - * The -sstep seek to the new position, without decoding all frames but, - * expecially on avi file coded whith mpeg4 (lavc or xvid or divx), the - * seek is not always too much precise. - * - * This filter simply discard the unwanted frames, so you are very precise in - * counting the frame but sometime you use a lot of CPU for nothing. - * - * As usual it depends on what you're doing. - * - * copyright (c) 2003 Daniele Forghieri ( guru@digitalfantasy.it ) - * - * This file is part of MPlayer. - * - * MPlayer is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * MPlayer 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with MPlayer; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "config.h" -#include "mp_msg.h" -#include "cpudetect.h" - -#include "img_format.h" -#include "mp_image.h" -#include "vf.h" - -/* Uncomment if you want to print some info on the format */ -// #define DUMP_FORMAT_DATA - -/* Private data */ -struct vf_priv_s { - /* Current frame */ - int frame_cur; - /* Frame output step, 0 = all */ - int frame_step; - /* Only I-Frame (2), print on I-Frame (1) */ - int dump_iframe; -}; - -/* Filter handler */ -static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts) -{ - mp_image_t *dmpi; - struct vf_priv_s *priv; - int skip; - - priv = vf->priv; - - /* Print the 'I' if is a intra frame. The \n advance the current line so you got the - * current file time (in second) and the frame number on the console ;-) - */ - if (priv->dump_iframe) { - if (mpi->pict_type == 1) { - mp_msg(MSGT_VFILTER, MSGL_INFO, "I!\n"); - } - } - - /* decide if frame must be shown */ - if (priv->dump_iframe == 2) { - /* Only key frame */ - skip = mpi->pict_type == 1 ? 0 : 1; - } - else { - /* Only 1 every frame_step */ - skip = 0; - if ((priv->frame_step != 0) && ((priv->frame_cur % priv->frame_step) != 0)) { - skip = 1; - } - } - /* Increment current frame */ - ++priv->frame_cur; - - if (skip == 0) { - /* Get image, export type (we don't modify tghe image) */ - dmpi=vf_get_image(vf->next, mpi->imgfmt, - MP_IMGTYPE_EXPORT, 0, - mpi->w, mpi->h); - /* Copy only the pointer ( MP_IMGTYPE_EXPORT ! ) */ - dmpi->planes[0] = mpi->planes[0]; - dmpi->planes[1] = mpi->planes[1]; - dmpi->planes[2] = mpi->planes[2]; - - dmpi->stride[0] = mpi->stride[0]; - dmpi->stride[1] = mpi->stride[1]; - dmpi->stride[2] = mpi->stride[2]; - - dmpi->width = mpi->width; - dmpi->height = mpi->height; - - /* Chain to next filter / output ... */ - return vf_next_put_image(vf, dmpi, pts); - } - - /* Skip the frame */ - return 0; -} - -static void uninit(struct vf_instance *vf) -{ - /* Free private data */ - free(vf->priv); -} - -/* Main entry funct for the filter */ -static int vf_open(vf_instance_t *vf, char *args) -{ - struct vf_priv_s *p; - - vf->put_image = put_image; - vf->uninit = uninit; - vf->default_reqs = VFCAP_ACCEPT_STRIDE; - vf->priv = p = calloc(1, sizeof(struct vf_priv_s)); - if (p == NULL) { - return 0; - } - - if (args != NULL) { -#ifdef DUMP_FORMAT_DATA - if (*args == 'd') { - p->dump_iframe = 3; - } - else -#endif - if (*args == 'I') { - /* Dump only KEY (ie INTRA) frame */ - p->dump_iframe = 2; - } - else { - if (*args == 'i') { - /* Print a 'I!' when a i-frame is encounter */ - p->dump_iframe = 1; - ++args; - } - - if (*args != '\0') { - p->frame_step = atoi(args); - if (p->frame_step <= 0) { - mp_tmsg(MSGT_VFILTER, MSGL_WARN, "[VF_FRAMESTEP] Error parsing argument.\n"); - return 0; - } - } - } - } - return 1; -} - -const vf_info_t vf_info_framestep = { - "Dump one every n / key frames", - "framestep", - "Daniele Forghieri", - "", - vf_open, - NULL -}; |