diff options
author | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2009-10-28 00:40:43 +0300 |
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committer | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2009-10-28 00:40:43 +0300 |
commit | fcbed3c73554d7edeb0f7431e25d64a387d65ff2 (patch) | |
tree | 6c493e67bfc11973f5753d4fe2636f9adcaaab26 /libavfilter/vf_format.c | |
parent | 51135d1d8e113aef5dbafd578460daeb92972c7f (diff) |
Add format and noformat filters.
Originally committed as revision 20390 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavfilter/vf_format.c')
-rw-r--r-- | libavfilter/vf_format.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/libavfilter/vf_format.c b/libavfilter/vf_format.c new file mode 100644 index 0000000000..1552848344 --- /dev/null +++ b/libavfilter/vf_format.c @@ -0,0 +1,154 @@ +/* + * 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 libavfilter/vf_format.c + * video format and noformat filters + */ + +#include "avfilter.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; + 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; + pix_fmt = avcodec_get_pix_fmt(pix_fmt_name); + + if (pix_fmt == PIX_FMT_NONE) { + av_log(ctx, AV_LOG_ERROR, "Unknown pixel format: %s\n", pix_fmt_name); + return -1; + } + + 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; +} + +static int query_formats_format(AVFilterContext *ctx) +{ + avfilter_set_common_formats(ctx, make_format_list(ctx->priv, 1)); + return 0; +} + +static int query_formats_noformat(AVFilterContext *ctx) +{ + avfilter_set_common_formats(ctx, make_format_list(ctx->priv, 0)); + return 0; +} + +static void start_frame(AVFilterLink *link, AVFilterPicRef *picref) +{ + avfilter_start_frame(link->dst->outputs[0], picref); +} + +static void end_frame(AVFilterLink *link) +{ + avfilter_end_frame(link->dst->outputs[0]); +} + +static void draw_slice(AVFilterLink *link, int y, int h) +{ + avfilter_draw_slice(link->dst->outputs[0], y, h); +} + +AVFilter avfilter_vf_format = { + .name = "format", + .description = "Convert the input video to one of the specified pixel formats.", + + .init = init, + + .query_formats = query_formats_format, + + .priv_size = sizeof(FormatContext), + + .inputs = (AVFilterPad[]) {{ .name = "default", + .type = CODEC_TYPE_VIDEO, + .start_frame = start_frame, + .draw_slice = draw_slice, + .end_frame = end_frame, }, + { .name = NULL}}, + .outputs = (AVFilterPad[]) {{ .name = "default", + .type = CODEC_TYPE_VIDEO }, + { .name = NULL}}, +}; + +AVFilter avfilter_vf_noformat = { + .name = "noformat", + .description = "Force libavfilter not to use any of the specified pixel formats as the input to the next filter.", + + .init = init, + + .query_formats = query_formats_noformat, + + .priv_size = sizeof(FormatContext), + + .inputs = (AVFilterPad[]) {{ .name = "default", + .type = CODEC_TYPE_VIDEO, + .start_frame = start_frame, + .draw_slice = draw_slice, + .end_frame = end_frame, }, + { .name = NULL}}, + .outputs = (AVFilterPad[]) {{ .name = "default", + .type = CODEC_TYPE_VIDEO }, + { .name = NULL}}, +}; |