85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
/*****************************************************************************
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* source.c: source video filter
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*****************************************************************************
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* Copyright (C) 2010-2025 x264 project
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*
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* Authors: Steven Walters <kemuri9@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
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*
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* This program is also available under a commercial proprietary license.
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* For more information, contact us at licensing@x264.com.
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*****************************************************************************/
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#include "video.h"
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/* This filter converts the demuxer API into the filtering API for video frames.
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* Backseeking is prohibited here as not all demuxers are capable of doing so. */
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typedef struct
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{
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cli_pic_t pic;
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hnd_t hin;
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int cur_frame;
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} source_hnd_t;
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cli_vid_filter_t source_filter;
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static int init( hnd_t *handle, cli_vid_filter_t *filter, video_info_t *info, x264_param_t *param, char *opt_string )
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{
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source_hnd_t *h = calloc( 1, sizeof(source_hnd_t) );
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if( !h )
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return -1;
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h->cur_frame = -1;
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if( cli_input.picture_alloc( &h->pic, *handle, info->csp, info->width, info->height ) )
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return -1;
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h->hin = *handle;
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*handle = h;
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*filter = source_filter;
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return 0;
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}
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static int get_frame( hnd_t handle, cli_pic_t *output, int frame )
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{
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source_hnd_t *h = handle;
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/* do not allow requesting of frames from before the current position */
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if( frame <= h->cur_frame || cli_input.read_frame( &h->pic, h->hin, frame ) )
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return -1;
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h->cur_frame = frame;
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*output = h->pic;
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return 0;
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}
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static int release_frame( hnd_t handle, cli_pic_t *pic, int frame )
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{
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source_hnd_t *h = handle;
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if( cli_input.release_frame && cli_input.release_frame( &h->pic, h->hin ) )
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return -1;
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return 0;
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}
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static void free_filter( hnd_t handle )
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{
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source_hnd_t *h = handle;
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cli_input.picture_clean( &h->pic, h->hin );
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cli_input.close_file( h->hin );
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free( h );
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}
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cli_vid_filter_t source_filter = { "source", NULL, init, get_frame, release_frame, free_filter, NULL };
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