mirror of https://git.ffmpeg.org/ffmpeg.git
146 lines
4.9 KiB
C
146 lines
4.9 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 "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "internal.h"
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typedef struct {
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/**
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* List of flags telling if a given image format has been listed
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* as argument to the filter.
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*/
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int listed_pix_fmt_flags[PIX_FMT_NB];
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} FormatContext;
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#define PIX_FMT_NAME_MAXSIZE 32
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static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
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{
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FormatContext *format = ctx->priv;
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const char *cur, *sep;
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char pix_fmt_name[PIX_FMT_NAME_MAXSIZE];
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int pix_fmt_name_len, ret;
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enum PixelFormat pix_fmt;
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/* parse the list of formats */
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for (cur = args; cur; cur = sep ? sep+1 : NULL) {
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if (!(sep = strchr(cur, ':')))
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pix_fmt_name_len = strlen(cur);
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else
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pix_fmt_name_len = sep - cur;
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if (pix_fmt_name_len >= PIX_FMT_NAME_MAXSIZE) {
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av_log(ctx, AV_LOG_ERROR, "Format name too long\n");
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return -1;
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}
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memcpy(pix_fmt_name, cur, pix_fmt_name_len);
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pix_fmt_name[pix_fmt_name_len] = 0;
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if ((ret = ff_parse_pixel_format(&pix_fmt, pix_fmt_name, ctx)) < 0)
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return ret;
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format->listed_pix_fmt_flags[pix_fmt] = 1;
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}
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return 0;
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}
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static AVFilterFormats *make_format_list(FormatContext *format, int flag)
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{
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AVFilterFormats *formats;
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enum PixelFormat pix_fmt;
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formats = av_mallocz(sizeof(AVFilterFormats));
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formats->formats = av_malloc(sizeof(enum PixelFormat) * PIX_FMT_NB);
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for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++)
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if (format->listed_pix_fmt_flags[pix_fmt] == flag)
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formats->formats[formats->format_count++] = pix_fmt;
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return formats;
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}
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#if CONFIG_FORMAT_FILTER
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static int query_formats_format(AVFilterContext *ctx)
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{
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avfilter_set_common_pixel_formats(ctx, make_format_list(ctx->priv, 1));
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return 0;
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}
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AVFilter avfilter_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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.query_formats = query_formats_format,
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.priv_size = sizeof(FormatContext),
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.inputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.get_video_buffer= avfilter_null_get_video_buffer,
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.start_frame = avfilter_null_start_frame,
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.draw_slice = avfilter_null_draw_slice,
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.end_frame = avfilter_null_end_frame, },
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{ .name = NULL}},
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.outputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_VIDEO },
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{ .name = NULL}},
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};
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#endif /* CONFIG_FORMAT_FILTER */
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#if CONFIG_NOFORMAT_FILTER
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static int query_formats_noformat(AVFilterContext *ctx)
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{
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avfilter_set_common_pixel_formats(ctx, make_format_list(ctx->priv, 0));
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return 0;
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}
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AVFilter avfilter_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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.init = init,
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.query_formats = query_formats_noformat,
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.priv_size = sizeof(FormatContext),
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.inputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.get_video_buffer= avfilter_null_get_video_buffer,
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.start_frame = avfilter_null_start_frame,
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.draw_slice = avfilter_null_draw_slice,
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.end_frame = avfilter_null_end_frame, },
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{ .name = NULL}},
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.outputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_VIDEO },
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{ .name = NULL}},
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};
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#endif /* CONFIG_NOFORMAT_FILTER */
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