8179953777
Commited in SoC by Bobby Bingham on 2007-08-18 03:38:40 Originally committed as revision 12017 to svn://svn.ffmpeg.org/ffmpeg/trunk
384 lines
11 KiB
C
384 lines
11 KiB
C
/*
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* Filter layer
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* copyright (c) 2007 Bobby Bingham
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 FFmpeg; 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 <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include "avfilter.h"
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#include "allfilters.h"
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/** list of registered filters */
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struct FilterList
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{
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AVFilter *filter;
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struct FilterList *next;
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} *filters = NULL;
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/** helper macros to get the in/out pad on the dst/src filter */
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#define link_dpad(link) link->dst-> input_pads[link->dstpad]
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#define link_spad(link) link->src->output_pads[link->srcpad]
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AVFilterPicRef *avfilter_ref_pic(AVFilterPicRef *ref, int pmask)
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{
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AVFilterPicRef *ret = av_malloc(sizeof(AVFilterPicRef));
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*ret = *ref;
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ret->perms &= pmask;
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ret->pic->refcount ++;
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return ret;
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}
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void avfilter_unref_pic(AVFilterPicRef *ref)
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{
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if(-- ref->pic->refcount == 0)
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ref->pic->free(ref->pic);
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av_free(ref);
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}
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void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
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AVFilterPad **pads, AVFilterLink ***links,
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AVFilterPad *newpad)
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{
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unsigned i;
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idx = FFMIN(idx, *count);
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*pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
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*links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
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memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
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memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
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memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
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(*links)[idx] = NULL;
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(*count) ++;
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for(i = idx+1; i < *count; i ++)
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if(*links[i])
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(*(unsigned *)((uint8_t *)(*links[i]) + padidx_off)) ++;
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}
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int avfilter_link(AVFilterContext *src, unsigned srcpad,
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AVFilterContext *dst, unsigned dstpad)
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{
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AVFilterLink *link;
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if(src->output_count <= srcpad || dst->input_count <= dstpad ||
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src->outputs[srcpad] || dst->inputs[dstpad])
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return -1;
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src->outputs[srcpad] =
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dst->inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
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link->src = src;
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link->dst = dst;
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link->srcpad = srcpad;
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link->dstpad = dstpad;
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link->format = -1;
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return 0;
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}
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int avfilter_config_link(AVFilterLink *link)
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{
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int *fmts[2], i, j;
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int (*config_link)(AVFilterLink *);
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int *(*query_formats)(AVFilterLink *link);
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if(!link)
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return 0;
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/* find a format both filters support - TODO: auto-insert conversion filter */
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link->format = -1;
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if(!(query_formats = link_spad(link).query_formats))
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query_formats = avfilter_default_query_output_formats;
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fmts[0] = query_formats(link);
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fmts[1] = link_dpad(link).query_formats(link);
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for(i = 0; fmts[0][i] != -1; i ++)
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for(j = 0; fmts[1][j] != -1; j ++)
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if(fmts[0][i] == fmts[1][j]) {
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link->format = fmts[0][i];
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goto format_done;
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}
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format_done:
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av_free(fmts[0]);
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av_free(fmts[1]);
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if(link->format == -1)
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return -1;
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if(!(config_link = link_spad(link).config_props))
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config_link = avfilter_default_config_output_link;
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if(config_link(link))
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return -1;
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if(!(config_link = link_dpad(link).config_props))
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config_link = avfilter_default_config_input_link;
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if(config_link(link))
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return -1;
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return 0;
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}
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AVFilterPicRef *avfilter_get_video_buffer(AVFilterLink *link, int perms)
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{
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AVFilterPicRef *ret = NULL;
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if(link_dpad(link).get_video_buffer)
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ret = link_dpad(link).get_video_buffer(link, perms);
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if(!ret)
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ret = avfilter_default_get_video_buffer(link, perms);
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return ret;
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}
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int avfilter_request_frame(AVFilterLink *link)
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{
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if(link_spad(link).request_frame)
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return link_spad(link).request_frame(link);
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else if(link->src->inputs[0])
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return avfilter_request_frame(link->src->inputs[0]);
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else return -1;
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}
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/* XXX: should we do the duplicating of the picture ref here, instead of
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* forcing the source filter to do it? */
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void avfilter_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
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{
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void (*start_frame)(AVFilterLink *, AVFilterPicRef *);
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if(!(start_frame = link_dpad(link).start_frame))
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start_frame = avfilter_default_start_frame;
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/* prepare to copy the picture if it has insufficient permissions */
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if((link_dpad(link).min_perms & picref->perms) != link_dpad(link).min_perms ||
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link_dpad(link).rej_perms & picref->perms) {
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av_log(link->dst, AV_LOG_INFO,
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"frame copy needed (have perms %x, need %x, reject %x)\n",
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picref->perms,
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link_dpad(link).min_perms, link_dpad(link).rej_perms);
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link->cur_pic = avfilter_default_get_video_buffer(link, link_dpad(link).min_perms);
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link->srcpic = picref;
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}
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else
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link->cur_pic = picref;
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start_frame(link, link->cur_pic);
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}
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void avfilter_end_frame(AVFilterLink *link)
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{
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void (*end_frame)(AVFilterLink *);
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/* unreference the source picture if we're feeding the destination filter
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* a copied version dues to permission issues */
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if(link->srcpic) {
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avfilter_unref_pic(link->srcpic);
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link->srcpic = NULL;
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}
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if(!(end_frame = link_dpad(link).end_frame))
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end_frame = avfilter_default_end_frame;
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end_frame(link);
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}
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void avfilter_draw_slice(AVFilterLink *link, int y, int h)
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{
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uint8_t *src[4], *dst[4];
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int i, j, hsub, vsub;
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/* copy the slice if needed for permission reasons */
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if(link->srcpic) {
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avcodec_get_chroma_sub_sample(link->format, &hsub, &vsub);
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src[0] = link->srcpic-> data[0] + y * link->srcpic-> linesize[0];
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dst[0] = link->cur_pic->data[0] + y * link->cur_pic->linesize[0];
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for(i = 1; i < 4; i ++) {
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if(link->srcpic->data[i]) {
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src[i] = link->srcpic-> data[i] + (y >> vsub) * link->srcpic-> linesize[i];
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dst[i] = link->cur_pic->data[i] + (y >> vsub) * link->cur_pic->linesize[i];
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} else
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src[i] = dst[i] = NULL;
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}
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for(j = 0; j < h; j ++) {
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memcpy(dst[0], src[0], link->cur_pic->linesize[0]);
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src[0] += link->srcpic ->linesize[0];
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dst[0] += link->cur_pic->linesize[0];
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}
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for(i = 1; i < 4; i ++) {
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if(!src[i]) continue;
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for(j = 0; j < h >> vsub; j ++) {
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memcpy(dst[i], src[i], link->cur_pic->linesize[i]);
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src[i] += link->srcpic ->linesize[i];
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dst[i] += link->cur_pic->linesize[i];
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}
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}
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}
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if(!link_dpad(link).draw_slice)
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return;
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link_dpad(link).draw_slice(link, y, h);
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}
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AVFilter *avfilter_get_by_name(char *name)
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{
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struct FilterList *filt;
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for(filt = filters; filt; filt = filt->next)
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if(!strcmp(filt->filter->name, name))
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return filt->filter;
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return NULL;
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}
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/* FIXME: insert in order, rather than insert at end + resort */
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void avfilter_register(AVFilter *filter)
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{
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struct FilterList *newfilt = av_malloc(sizeof(struct FilterList));
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newfilt->filter = filter;
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newfilt->next = filters;
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filters = newfilt;
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}
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void avfilter_init(void)
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{
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avfilter_register(&vsrc_dummy);
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avfilter_register(&vsrc_ppm);
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avfilter_register(&vf_buffer);
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avfilter_register(&vf_crop);
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avfilter_register(&vf_fps);
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avfilter_register(&vf_graph);
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avfilter_register(&vf_graphdesc);
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avfilter_register(&vf_graphfile);
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avfilter_register(&vf_overlay);
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avfilter_register(&vf_passthrough);
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avfilter_register(&vf_rgb2bgr);
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avfilter_register(&vf_slicify);
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avfilter_register(&vf_split);
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avfilter_register(&vf_vflip);
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}
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void avfilter_uninit(void)
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{
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struct FilterList *tmp;
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for(; filters; filters = tmp) {
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tmp = filters->next;
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av_free(filters);
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}
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}
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static int pad_count(const AVFilterPad *pads)
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{
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AVFilterPad *p = (AVFilterPad *) pads;
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int count;
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for(count = 0; p->name; count ++) p ++;
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return count;
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}
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static const char *filter_name(void *p)
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{
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AVFilterContext *filter = p;
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return filter->filter->name;
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}
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AVFilterContext *avfilter_open(AVFilter *filter, char *inst_name)
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{
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AVFilterContext *ret = av_malloc(sizeof(AVFilterContext));
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ret->av_class = av_mallocz(sizeof(AVClass));
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ret->av_class->item_name = filter_name;
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ret->filter = filter;
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ret->name = inst_name ? av_strdup(inst_name) : NULL;
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ret->priv = av_mallocz(filter->priv_size);
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ret->input_count = pad_count(filter->inputs);
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ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
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memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad)*ret->input_count);
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ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
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ret->output_count = pad_count(filter->outputs);
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ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
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memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad)*ret->output_count);
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ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
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return ret;
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}
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void avfilter_destroy(AVFilterContext *filter)
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{
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int i;
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if(filter->filter->uninit)
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filter->filter->uninit(filter);
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for(i = 0; i < filter->input_count; i ++) {
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if(filter->inputs[i])
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filter->inputs[i]->src->outputs[filter->inputs[i]->srcpad] = NULL;
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av_freep(&filter->inputs[i]);
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}
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for(i = 0; i < filter->output_count; i ++) {
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if(filter->outputs[i])
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filter->outputs[i]->dst->inputs[filter->outputs[i]->dstpad] = NULL;
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av_freep(&filter->outputs[i]);
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}
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av_freep(&filter->name);
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av_freep(&filter->input_pads);
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av_freep(&filter->output_pads);
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av_freep(&filter->inputs);
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av_freep(&filter->outputs);
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av_freep(&filter->priv);
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av_freep(&filter->av_class);
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av_free(filter);
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}
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int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
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{
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int ret;
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if(filter->filter->init)
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if((ret = filter->filter->init(filter, args, opaque))) return ret;
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return 0;
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}
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int *avfilter_make_format_list(int len, ...)
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{
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int *ret, i;
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va_list vl;
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ret = av_malloc(sizeof(int) * (len + 1));
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va_start(vl, len);
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for(i = 0; i < len; i ++)
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ret[i] = va_arg(vl, int);
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va_end(vl);
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ret[len] = -1;
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return ret;
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}
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