2 * Copyright (C) 2006-2011 Michael Niedermayer <michaelni@gmx.at>
3 * 2010 James Darnley <james.darnley@gmail.com>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avassert.h"
23 #include "libavutil/imgutils.h"
27 static int return_frame(AVFilterContext *ctx, int is_second)
29 YADIFContext *yadif = ctx->priv;
30 AVFilterLink *link = ctx->outputs[0];
33 if (yadif->parity == -1) {
34 tff = yadif->cur->interlaced_frame ?
35 yadif->cur->top_field_first : 1;
37 tff = yadif->parity ^ 1;
41 yadif->out = ff_get_video_buffer(link, link->w, link->h);
43 return AVERROR(ENOMEM);
45 av_frame_copy_props(yadif->out, yadif->cur);
46 yadif->out->interlaced_frame = 0;
49 yadif->filter(ctx, yadif->out, tff ^ !is_second, tff);
52 int64_t cur_pts = yadif->cur->pts;
53 int64_t next_pts = yadif->next->pts;
55 if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
56 yadif->out->pts = cur_pts + next_pts;
58 yadif->out->pts = AV_NOPTS_VALUE;
61 ret = ff_filter_frame(ctx->outputs[0], yadif->out);
63 yadif->frame_pending = (yadif->mode&1) && !is_second;
67 static int checkstride(YADIFContext *yadif, const AVFrame *a, const AVFrame *b)
70 for (i = 0; i < yadif->csp->nb_components; i++)
71 if (a->linesize[i] != b->linesize[i])
76 static void fixstride(AVFilterLink *link, AVFrame *f)
78 AVFrame *dst = ff_default_get_video_buffer(link, f->width, f->height);
81 av_frame_copy_props(dst, f);
82 av_image_copy(dst->data, dst->linesize,
83 (const uint8_t **)f->data, f->linesize,
84 dst->format, dst->width, dst->height);
86 av_frame_move_ref(f, dst);
90 int ff_yadif_filter_frame(AVFilterLink *link, AVFrame *frame)
92 AVFilterContext *ctx = link->dst;
93 YADIFContext *yadif = ctx->priv;
97 if (yadif->frame_pending)
101 av_frame_free(&yadif->prev);
102 yadif->prev = yadif->cur;
103 yadif->cur = yadif->next;
107 !(yadif->cur = av_frame_clone(yadif->next)))
108 return AVERROR(ENOMEM);
110 if (checkstride(yadif, yadif->next, yadif->cur)) {
111 av_log(ctx, AV_LOG_VERBOSE, "Reallocating frame due to differing stride\n");
112 fixstride(link, yadif->next);
114 if (checkstride(yadif, yadif->next, yadif->cur))
115 fixstride(link, yadif->cur);
116 if (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))
117 fixstride(link, yadif->prev);
118 if (checkstride(yadif, yadif->next, yadif->cur) || (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))) {
119 av_log(ctx, AV_LOG_ERROR, "Failed to reallocate frame\n");
126 if ((yadif->deint && !yadif->cur->interlaced_frame) ||
128 (yadif->deint && !yadif->prev->interlaced_frame && yadif->prev->repeat_pict) ||
129 (yadif->deint && !yadif->next->interlaced_frame && yadif->next->repeat_pict)
131 yadif->out = av_frame_clone(yadif->cur);
133 return AVERROR(ENOMEM);
135 av_frame_free(&yadif->prev);
136 if (yadif->out->pts != AV_NOPTS_VALUE)
137 yadif->out->pts *= 2;
138 return ff_filter_frame(ctx->outputs[0], yadif->out);
141 yadif->out = ff_get_video_buffer(ctx->outputs[0], link->w, link->h);
143 return AVERROR(ENOMEM);
145 av_frame_copy_props(yadif->out, yadif->cur);
146 yadif->out->interlaced_frame = 0;
148 if (yadif->out->pts != AV_NOPTS_VALUE)
149 yadif->out->pts *= 2;
151 return return_frame(ctx, 0);
154 int ff_yadif_request_frame(AVFilterLink *link)
156 AVFilterContext *ctx = link->src;
157 YADIFContext *yadif = ctx->priv;
160 if (yadif->frame_pending) {
161 return_frame(ctx, 1);
168 ret = ff_request_frame(ctx->inputs[0]);
170 if (ret == AVERROR_EOF && yadif->cur) {
171 AVFrame *next = av_frame_clone(yadif->next);
174 return AVERROR(ENOMEM);
176 next->pts = yadif->next->pts * 2 - yadif->cur->pts;
178 ff_yadif_filter_frame(ctx->inputs[0], next);
180 } else if (ret < 0) {
187 #define OFFSET(x) offsetof(YADIFContext, x)
188 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
190 #define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, unit }
192 const AVOption ff_yadif_options[] = {
193 { "mode", "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=YADIF_MODE_SEND_FRAME}, 0, 3, FLAGS, "mode"},
194 CONST("send_frame", "send one frame for each frame", YADIF_MODE_SEND_FRAME, "mode"),
195 CONST("send_field", "send one frame for each field", YADIF_MODE_SEND_FIELD, "mode"),
196 CONST("send_frame_nospatial", "send one frame for each frame, but skip spatial interlacing check", YADIF_MODE_SEND_FRAME_NOSPATIAL, "mode"),
197 CONST("send_field_nospatial", "send one frame for each field, but skip spatial interlacing check", YADIF_MODE_SEND_FIELD_NOSPATIAL, "mode"),
199 { "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=YADIF_PARITY_AUTO}, -1, 1, FLAGS, "parity" },
200 CONST("tff", "assume top field first", YADIF_PARITY_TFF, "parity"),
201 CONST("bff", "assume bottom field first", YADIF_PARITY_BFF, "parity"),
202 CONST("auto", "auto detect parity", YADIF_PARITY_AUTO, "parity"),
204 { "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=YADIF_DEINT_ALL}, 0, 1, FLAGS, "deint" },
205 CONST("all", "deinterlace all frames", YADIF_DEINT_ALL, "deint"),
206 CONST("interlaced", "only deinterlace frames marked as interlaced", YADIF_DEINT_INTERLACED, "deint"),