| /* |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * format and noformat video filters |
| */ |
| |
| #include "libavutil/pixdesc.h" |
| #include "avfilter.h" |
| #include "internal.h" |
| #include "video.h" |
| |
| typedef struct { |
| /** |
| * List of flags telling if a given image format has been listed |
| * as argument to the filter. |
| */ |
| int listed_pix_fmt_flags[PIX_FMT_NB]; |
| } FormatContext; |
| |
| #define PIX_FMT_NAME_MAXSIZE 32 |
| |
| static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) |
| { |
| FormatContext *format = ctx->priv; |
| const char *cur, *sep; |
| char pix_fmt_name[PIX_FMT_NAME_MAXSIZE]; |
| int pix_fmt_name_len, ret; |
| enum PixelFormat pix_fmt; |
| |
| /* parse the list of formats */ |
| for (cur = args; cur; cur = sep ? sep+1 : NULL) { |
| if (!(sep = strchr(cur, ':'))) |
| pix_fmt_name_len = strlen(cur); |
| else |
| pix_fmt_name_len = sep - cur; |
| if (pix_fmt_name_len >= PIX_FMT_NAME_MAXSIZE) { |
| av_log(ctx, AV_LOG_ERROR, "Format name too long\n"); |
| return -1; |
| } |
| |
| memcpy(pix_fmt_name, cur, pix_fmt_name_len); |
| pix_fmt_name[pix_fmt_name_len] = 0; |
| |
| if ((ret = ff_parse_pixel_format(&pix_fmt, pix_fmt_name, ctx)) < 0) |
| return ret; |
| |
| format->listed_pix_fmt_flags[pix_fmt] = 1; |
| } |
| |
| return 0; |
| } |
| |
| static AVFilterFormats *make_format_list(FormatContext *format, int flag) |
| { |
| AVFilterFormats *formats; |
| enum PixelFormat pix_fmt; |
| |
| formats = av_mallocz(sizeof(AVFilterFormats)); |
| formats->formats = av_malloc(sizeof(enum PixelFormat) * PIX_FMT_NB); |
| |
| for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++) |
| if (format->listed_pix_fmt_flags[pix_fmt] == flag) |
| formats->formats[formats->format_count++] = pix_fmt; |
| |
| return formats; |
| } |
| |
| #if CONFIG_FORMAT_FILTER |
| static int query_formats_format(AVFilterContext *ctx) |
| { |
| avfilter_set_common_pixel_formats(ctx, make_format_list(ctx->priv, 1)); |
| return 0; |
| } |
| |
| AVFilter avfilter_vf_format = { |
| .name = "format", |
| .description = NULL_IF_CONFIG_SMALL("Convert the input video to one of the specified pixel formats."), |
| |
| .init = init, |
| |
| .query_formats = query_formats_format, |
| |
| .priv_size = sizeof(FormatContext), |
| |
| .inputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .get_video_buffer= ff_null_get_video_buffer, |
| .start_frame = ff_null_start_frame, |
| .draw_slice = ff_null_draw_slice, |
| .end_frame = ff_null_end_frame, }, |
| { .name = NULL}}, |
| .outputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO }, |
| { .name = NULL}}, |
| }; |
| #endif /* CONFIG_FORMAT_FILTER */ |
| |
| #if CONFIG_NOFORMAT_FILTER |
| static int query_formats_noformat(AVFilterContext *ctx) |
| { |
| avfilter_set_common_pixel_formats(ctx, make_format_list(ctx->priv, 0)); |
| return 0; |
| } |
| |
| AVFilter avfilter_vf_noformat = { |
| .name = "noformat", |
| .description = NULL_IF_CONFIG_SMALL("Force libavfilter not to use any of the specified pixel formats for the input to the next filter."), |
| |
| .init = init, |
| |
| .query_formats = query_formats_noformat, |
| |
| .priv_size = sizeof(FormatContext), |
| |
| .inputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .get_video_buffer= ff_null_get_video_buffer, |
| .start_frame = ff_null_start_frame, |
| .draw_slice = ff_null_draw_slice, |
| .end_frame = ff_null_end_frame, }, |
| { .name = NULL}}, |
| .outputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO }, |
| { .name = NULL}}, |
| }; |
| #endif /* CONFIG_NOFORMAT_FILTER */ |