mirror of https://git.ffmpeg.org/ffmpeg.git
208 lines
6.5 KiB
C
208 lines
6.5 KiB
C
/*
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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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/**
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* @file
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* format and noformat video filters
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*/
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#include "config_components.h"
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#include <string.h>
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#include "libavutil/internal.h"
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#include "libavutil/mem.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/opt.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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typedef struct FormatContext {
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const AVClass *class;
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char *pix_fmts;
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char *csps;
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char *ranges;
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AVFilterFormats *formats; ///< parsed from `pix_fmts`
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AVFilterFormats *color_spaces; ///< parsed from `csps`
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AVFilterFormats *color_ranges; ///< parsed from `ranges`
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} FormatContext;
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static av_cold void uninit(AVFilterContext *ctx)
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{
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FormatContext *s = ctx->priv;
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ff_formats_unref(&s->formats);
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ff_formats_unref(&s->color_spaces);
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ff_formats_unref(&s->color_ranges);
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}
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static av_cold int invert_formats(AVFilterFormats **fmts,
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AVFilterFormats *allfmts)
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{
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if (!allfmts)
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return AVERROR(ENOMEM);
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if (!*fmts) {
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/* empty fmt list means no restriction, regardless of filter type */
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ff_formats_unref(&allfmts);
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return 0;
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}
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for (int i = 0; i < allfmts->nb_formats; i++) {
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for (int j = 0; j < (*fmts)->nb_formats; j++) {
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if (allfmts->formats[i] == (*fmts)->formats[j]) {
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/* format is forbidden, remove it from allfmts list */
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memmove(&allfmts->formats[i], &allfmts->formats[i+1],
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(allfmts->nb_formats - (i+1)) * sizeof(*allfmts->formats));
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allfmts->nb_formats--;
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i--; /* repeat loop with same idx */
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break;
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}
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}
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}
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ff_formats_unref(fmts);
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*fmts = allfmts;
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return 0;
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}
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static av_cold int init(AVFilterContext *ctx)
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{
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FormatContext *s = ctx->priv;
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enum AVPixelFormat pix_fmt;
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int ret;
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for (char *sep, *cur = s->pix_fmts; cur; cur = sep) {
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sep = strchr(cur, '|');
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if (sep && *sep)
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*sep++ = 0;
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if ((ret = ff_parse_pixel_format(&pix_fmt, cur, ctx)) < 0 ||
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(ret = ff_add_format(&s->formats, pix_fmt)) < 0)
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return ret;
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}
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for (char *sep, *cur = s->csps; cur; cur = sep) {
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sep = strchr(cur, '|');
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if (sep && *sep)
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*sep++ = 0;
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if ((ret = av_color_space_from_name(cur)) < 0 ||
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(ret = ff_add_format(&s->color_spaces, ret)) < 0)
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return ret;
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}
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for (char *sep, *cur = s->ranges; cur; cur = sep) {
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sep = strchr(cur, '|');
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if (sep && *sep)
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*sep++ = 0;
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if ((ret = av_color_range_from_name(cur)) < 0 ||
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(ret = ff_add_format(&s->color_ranges, ret)) < 0)
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return ret;
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}
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if (!strcmp(ctx->filter->name, "noformat")) {
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if ((ret = invert_formats(&s->formats, ff_all_formats(AVMEDIA_TYPE_VIDEO))) < 0 ||
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(ret = invert_formats(&s->color_spaces, ff_all_color_spaces())) < 0 ||
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(ret = invert_formats(&s->color_ranges, ff_all_color_ranges())) < 0)
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return ret;
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}
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/* hold on to a ref for the lifetime of the filter */
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if (s->formats && (ret = ff_formats_ref(s->formats, &s->formats)) < 0 ||
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s->color_spaces && (ret = ff_formats_ref(s->color_spaces, &s->color_spaces)) < 0 ||
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s->color_ranges && (ret = ff_formats_ref(s->color_ranges, &s->color_ranges)) < 0)
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return ret;
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return 0;
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}
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static int query_formats(AVFilterContext *ctx)
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{
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FormatContext *s = ctx->priv;
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int ret;
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if (s->formats && (ret = ff_set_common_formats(ctx, s->formats)) < 0 ||
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s->color_spaces && (ret = ff_set_common_color_spaces(ctx, s->color_spaces)) < 0 ||
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s->color_ranges && (ret = ff_set_common_color_ranges(ctx, s->color_ranges)) < 0)
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return ret;
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return 0;
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}
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#define OFFSET(x) offsetof(FormatContext, x)
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static const AVOption options[] = {
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{ "pix_fmts", "A '|'-separated list of pixel formats", OFFSET(pix_fmts), AV_OPT_TYPE_STRING, .flags = AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM },
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{ "color_spaces", "A '|'-separated list of color spaces", OFFSET(csps), AV_OPT_TYPE_STRING, .flags = AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM },
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{ "color_ranges", "A '|'-separated list of color ranges", OFFSET(ranges), AV_OPT_TYPE_STRING, .flags = AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS_EXT(format, "(no)format", options);
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static const AVFilterPad inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.get_buffer.video = ff_null_get_video_buffer,
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},
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};
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#if CONFIG_FORMAT_FILTER
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const AVFilter ff_vf_format = {
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.name = "format",
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.description = NULL_IF_CONFIG_SMALL("Convert the input video to one of the specified pixel formats."),
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.init = init,
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.uninit = uninit,
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.priv_size = sizeof(FormatContext),
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.priv_class = &format_class,
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.flags = AVFILTER_FLAG_METADATA_ONLY,
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FILTER_INPUTS(inputs),
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FILTER_OUTPUTS(ff_video_default_filterpad),
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FILTER_QUERY_FUNC(query_formats),
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};
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#endif /* CONFIG_FORMAT_FILTER */
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#if CONFIG_NOFORMAT_FILTER
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const AVFilter ff_vf_noformat = {
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.name = "noformat",
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.description = NULL_IF_CONFIG_SMALL("Force libavfilter not to use any of the specified pixel formats for the input to the next filter."),
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.priv_class = &format_class,
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.init = init,
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.uninit = uninit,
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.priv_size = sizeof(FormatContext),
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.flags = AVFILTER_FLAG_METADATA_ONLY,
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FILTER_INPUTS(inputs),
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FILTER_OUTPUTS(ff_video_default_filterpad),
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FILTER_QUERY_FUNC(query_formats),
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};
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#endif /* CONFIG_NOFORMAT_FILTER */
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