| /* |
| * 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 "avfilter.h" |
| |
| enum SetFieldMode { |
| MODE_AUTO = -1, |
| MODE_BFF, |
| MODE_TFF, |
| MODE_PROG, |
| }; |
| |
| typedef struct { |
| enum SetFieldMode mode; |
| } SetFieldContext; |
| |
| static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) |
| { |
| SetFieldContext *setfield = ctx->priv; |
| |
| setfield->mode = MODE_AUTO; |
| |
| if (args) { |
| char c; |
| if (sscanf(args, "%d%c", &setfield->mode, &c) != 1) { |
| if (!strcmp("tff", args)) setfield->mode = MODE_TFF; |
| else if (!strcmp("bff", args)) setfield->mode = MODE_BFF; |
| else if (!strcmp("prog", args)) setfield->mode = MODE_PROG; |
| else if (!strcmp("auto", args)) setfield->mode = MODE_AUTO; |
| else { |
| av_log(ctx, AV_LOG_ERROR, "Invalid argument '%s'\n", args); |
| return AVERROR(EINVAL); |
| } |
| } else { |
| if (setfield->mode < -1 || setfield->mode > 1) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Provided integer value %d must be included between -1 and +1\n", |
| setfield->mode); |
| return AVERROR(EINVAL); |
| } |
| av_log(ctx, AV_LOG_WARNING, |
| "Using -1/0/1 is deprecated, use auto/tff/bff/prog\n"); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref) |
| { |
| SetFieldContext *setfield = inlink->dst->priv; |
| AVFilterBufferRef *outpicref = avfilter_ref_buffer(inpicref, ~0); |
| |
| if (setfield->mode == MODE_PROG) { |
| outpicref->video->interlaced = 0; |
| } else if (setfield->mode != MODE_AUTO) { |
| outpicref->video->interlaced = 1; |
| outpicref->video->top_field_first = setfield->mode; |
| } |
| avfilter_start_frame(inlink->dst->outputs[0], outpicref); |
| } |
| |
| AVFilter avfilter_vf_setfield = { |
| .name = "setfield", |
| .description = NULL_IF_CONFIG_SMALL("Force field for the output video frame."), |
| .init = init, |
| |
| .priv_size = sizeof(SetFieldContext), |
| |
| .inputs = (const AVFilterPad[]) { |
| { .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .get_video_buffer = avfilter_null_get_video_buffer, |
| .start_frame = start_frame, }, |
| { .name = NULL } |
| }, |
| .outputs = (const AVFilterPad[]) { |
| { .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, }, |
| { .name = NULL } |
| }, |
| }; |