diff options
Diffstat (limited to 'libavfilter/vf_setfield.c')
-rw-r--r-- | libavfilter/vf_setfield.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/libavfilter/vf_setfield.c b/libavfilter/vf_setfield.c new file mode 100644 index 0000000..43949fa --- /dev/null +++ b/libavfilter/vf_setfield.c @@ -0,0 +1,115 @@ +/* + * Copyright (c) 2012 Stefano Sabatini + * + * 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 + * set field order + */ + +#include "libavutil/opt.h" +#include "avfilter.h" +#include "internal.h" +#include "video.h" + +enum SetFieldMode { + MODE_AUTO = -1, + MODE_BFF, + MODE_TFF, + MODE_PROG, +}; + +typedef struct { + const AVClass *class; + enum SetFieldMode mode; +} SetFieldContext; + +#define OFFSET(x) offsetof(SetFieldContext, x) +#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM + +static const AVOption setfield_options[] = { + {"mode", "select interlace mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_AUTO}, -1, MODE_PROG, FLAGS, "mode"}, + {"auto", "keep the same input field", 0, AV_OPT_TYPE_CONST, {.i64=MODE_AUTO}, INT_MIN, INT_MAX, FLAGS, "mode"}, + {"bff", "mark as bottom-field-first", 0, AV_OPT_TYPE_CONST, {.i64=MODE_BFF}, INT_MIN, INT_MAX, FLAGS, "mode"}, + {"tff", "mark as top-field-first", 0, AV_OPT_TYPE_CONST, {.i64=MODE_TFF}, INT_MIN, INT_MAX, FLAGS, "mode"}, + {"prog", "mark as progressive", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PROG}, INT_MIN, INT_MAX, FLAGS, "mode"}, + {NULL} +}; + +AVFILTER_DEFINE_CLASS(setfield); + +static av_cold int init(AVFilterContext *ctx, const char *args) +{ + SetFieldContext *setfield = ctx->priv; + static const char *shorthand[] = { "mode", NULL }; + + setfield->class = &setfield_class; + av_opt_set_defaults(setfield); + + return av_opt_set_from_string(setfield, args, shorthand, "=", ":"); +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + SetFieldContext *setfield = ctx->priv; + av_opt_free(setfield); +} + +static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *picref) +{ + SetFieldContext *setfield = inlink->dst->priv; + + if (setfield->mode == MODE_PROG) { + picref->video->interlaced = 0; + } else if (setfield->mode != MODE_AUTO) { + picref->video->interlaced = 1; + picref->video->top_field_first = setfield->mode; + } + return ff_filter_frame(inlink->dst->outputs[0], picref); +} + +static const AVFilterPad setfield_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .get_video_buffer = ff_null_get_video_buffer, + .filter_frame = filter_frame, + }, + { NULL } +}; + +static const AVFilterPad setfield_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; + +AVFilter avfilter_vf_setfield = { + .name = "setfield", + .description = NULL_IF_CONFIG_SMALL("Force field for the output video frame."), + .init = init, + .uninit = uninit, + + .priv_size = sizeof(SetFieldContext), + .inputs = setfield_inputs, + .outputs = setfield_outputs, + .priv_class = &setfield_class, +}; |