| /* |
| * Filter layer - default implementations |
| * copyright (c) 2007 Bobby Bingham |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavcodec/imgconvert.h" |
| #include "avfilter.h" |
| |
| /* TODO: buffer pool. see comment for avfilter_default_get_video_buffer() */ |
| void avfilter_default_free_video_buffer(AVFilterPic *pic) |
| { |
| av_free(pic->data[0]); |
| av_free(pic); |
| } |
| |
| #define ALIGN(a) do{ \ |
| (a) = ((a) + 15) & (~15); \ |
| } while(0); |
| |
| /* TODO: set the buffer's priv member to a context structure for the whole |
| * filter chain. This will allow for a buffer pool instead of the constant |
| * alloc & free cycle currently implemented. */ |
| AVFilterPicRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms) |
| { |
| AVFilterPic *pic = av_mallocz(sizeof(AVFilterPic)); |
| AVFilterPicRef *ref = av_mallocz(sizeof(AVFilterPicRef)); |
| int i, tempsize; |
| char *buf; |
| |
| ref->pic = pic; |
| ref->w = link->w; |
| ref->h = link->h; |
| |
| /* make sure the buffer gets read permission or it's useless for output */ |
| ref->perms = perms | AV_PERM_READ; |
| |
| pic->refcount = 1; |
| pic->format = link->format; |
| pic->free = avfilter_default_free_video_buffer; |
| ff_fill_linesize((AVPicture *)pic, pic->format, ref->w); |
| |
| for (i=0; i<4;i++) |
| ALIGN(pic->linesize[i]); |
| |
| tempsize = ff_fill_pointer((AVPicture *)pic, NULL, pic->format, ref->h); |
| buf = av_malloc(tempsize); |
| ff_fill_pointer((AVPicture *)pic, buf, pic->format, ref->h); |
| |
| memcpy(ref->data, pic->data, sizeof(pic->data)); |
| memcpy(ref->linesize, pic->linesize, sizeof(pic->linesize)); |
| |
| return ref; |
| } |
| |
| void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref) |
| { |
| AVFilterLink *out = NULL; |
| |
| if(link->dst->output_count) |
| out = link->dst->outputs[0]; |
| |
| if(out) { |
| out->outpic = avfilter_get_video_buffer(out, AV_PERM_WRITE); |
| out->outpic->pts = picref->pts; |
| avfilter_start_frame(out, avfilter_ref_pic(out->outpic, ~0)); |
| } |
| } |
| |
| void avfilter_default_draw_slice(AVFilterLink *link, int y, int h) |
| { |
| AVFilterLink *out = NULL; |
| |
| if(link->dst->output_count) |
| out = link->dst->outputs[0]; |
| |
| if(out) |
| avfilter_draw_slice(out, y, h); |
| } |
| |
| void avfilter_default_end_frame(AVFilterLink *link) |
| { |
| AVFilterLink *out = NULL; |
| |
| if(link->dst->output_count) |
| out = link->dst->outputs[0]; |
| |
| avfilter_unref_pic(link->cur_pic); |
| link->cur_pic = NULL; |
| |
| if(out) { |
| if(out->outpic) { |
| avfilter_unref_pic(out->outpic); |
| out->outpic = NULL; |
| } |
| avfilter_end_frame(out); |
| } |
| } |
| |
| /** |
| * default config_link() implementation for output video links to simplify |
| * the implementation of one input one output video filters */ |
| int avfilter_default_config_output_link(AVFilterLink *link) |
| { |
| if(link->src->input_count && link->src->inputs[0]) { |
| link->w = link->src->inputs[0]->w; |
| link->h = link->src->inputs[0]->h; |
| } else { |
| /* XXX: any non-simple filter which would cause this branch to be taken |
| * really should implement its own config_props() for this link. */ |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * A helper for query_formats() which sets all links to the same list of |
| * formats. If there are no links hooked to this filter, the list of formats is |
| * freed. |
| * |
| * FIXME: this will need changed for filters with a mix of pad types |
| * (video + audio, etc) |
| */ |
| void avfilter_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats) |
| { |
| int count = 0, i; |
| |
| for(i = 0; i < ctx->input_count; i ++) { |
| if(ctx->inputs[i]) { |
| avfilter_formats_ref(formats, &ctx->inputs[i]->out_formats); |
| count ++; |
| } |
| } |
| for(i = 0; i < ctx->output_count; i ++) { |
| if(ctx->outputs[i]) { |
| avfilter_formats_ref(formats, &ctx->outputs[i]->in_formats); |
| count ++; |
| } |
| } |
| |
| if(!count) { |
| av_free(formats->formats); |
| av_free(formats->refs); |
| av_free(formats); |
| } |
| } |
| |
| int avfilter_default_query_formats(AVFilterContext *ctx) |
| { |
| avfilter_set_common_formats(ctx, avfilter_all_colorspaces()); |
| return 0; |
| } |
| |