| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2013 Paul B Mahol | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #include "libavutil/pixdesc.h" | ||
| 22 | #include "avfilter.h" | ||
| 23 | #include "filters.h" | ||
| 24 | #include "video.h" | ||
| 25 | |||
| 26 | typedef struct SeparateFieldsContext { | ||
| 27 | int nb_planes; | ||
| 28 | AVFrame *second; | ||
| 29 | } SeparateFieldsContext; | ||
| 30 | |||
| 31 | 1 | static int config_props_output(AVFilterLink *outlink) | |
| 32 | { | ||
| 33 | 1 | AVFilterContext *ctx = outlink->src; | |
| 34 | 1 | SeparateFieldsContext *s = ctx->priv; | |
| 35 | 1 | AVFilterLink *inlink = ctx->inputs[0]; | |
| 36 | 1 | FilterLink *il = ff_filter_link(inlink); | |
| 37 | 1 | FilterLink *ol = ff_filter_link(outlink); | |
| 38 | |||
| 39 | 1 | s->nb_planes = av_pix_fmt_count_planes(inlink->format); | |
| 40 | |||
| 41 |
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1 | if (inlink->h & 1) { |
| 42 | ✗ | av_log(ctx, AV_LOG_ERROR, "height must be even\n"); | |
| 43 | ✗ | return AVERROR_INVALIDDATA; | |
| 44 | } | ||
| 45 | |||
| 46 | 1 | outlink->time_base.num = inlink->time_base.num; | |
| 47 | 1 | outlink->time_base.den = inlink->time_base.den * 2; | |
| 48 | 1 | ol->frame_rate.num = il->frame_rate.num * 2; | |
| 49 | 1 | ol->frame_rate.den = il->frame_rate.den; | |
| 50 | 1 | outlink->w = inlink->w; | |
| 51 | 1 | outlink->h = inlink->h / 2; | |
| 52 | |||
| 53 | 1 | return 0; | |
| 54 | } | ||
| 55 | |||
| 56 | 100 | static void extract_field(AVFrame *frame, int nb_planes, int type) | |
| 57 | { | ||
| 58 | int i; | ||
| 59 | |||
| 60 |
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400 | for (i = 0; i < nb_planes; i++) { |
| 61 |
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300 | if (type) |
| 62 | 150 | frame->data[i] = frame->data[i] + frame->linesize[i]; | |
| 63 | 300 | frame->linesize[i] *= 2; | |
| 64 | } | ||
| 65 | 100 | } | |
| 66 | |||
| 67 | 50 | static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref) | |
| 68 | { | ||
| 69 | 50 | AVFilterContext *ctx = inlink->dst; | |
| 70 | 50 | SeparateFieldsContext *s = ctx->priv; | |
| 71 | 50 | AVFilterLink *outlink = ctx->outputs[0]; | |
| 72 | int ret; | ||
| 73 | |||
| 74 | 50 | inpicref->height = outlink->h; | |
| 75 | 50 | inpicref->flags &= ~AV_FRAME_FLAG_INTERLACED; | |
| 76 | |||
| 77 |
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50 | if (!s->second) { |
| 78 | 1 | goto clone; | |
| 79 | } else { | ||
| 80 | 49 | AVFrame *second = s->second; | |
| 81 | |||
| 82 | 49 | extract_field(second, s->nb_planes, !!(second->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST)); | |
| 83 | |||
| 84 |
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49 | if (second->pts != AV_NOPTS_VALUE && |
| 85 |
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49 | inpicref->pts != AV_NOPTS_VALUE) |
| 86 | 49 | second->pts += inpicref->pts; | |
| 87 | else | ||
| 88 | ✗ | second->pts = AV_NOPTS_VALUE; | |
| 89 | |||
| 90 | 49 | ret = ff_filter_frame(outlink, second); | |
| 91 |
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49 | if (ret < 0) |
| 92 | ✗ | return ret; | |
| 93 | 49 | clone: | |
| 94 | 50 | s->second = av_frame_clone(inpicref); | |
| 95 |
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50 | if (!s->second) |
| 96 | ✗ | return AVERROR(ENOMEM); | |
| 97 | } | ||
| 98 | |||
| 99 | 50 | extract_field(inpicref, s->nb_planes, !(inpicref->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST)); | |
| 100 | |||
| 101 |
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50 | if (inpicref->pts != AV_NOPTS_VALUE) |
| 102 | 50 | inpicref->pts *= 2; | |
| 103 | |||
| 104 | 50 | return ff_filter_frame(outlink, inpicref); | |
| 105 | } | ||
| 106 | |||
| 107 | 1 | static int flush_frame(AVFilterLink *outlink, int64_t pts, int64_t *out_pts) | |
| 108 | { | ||
| 109 | 1 | AVFilterContext *ctx = outlink->src; | |
| 110 | 1 | SeparateFieldsContext *s = ctx->priv; | |
| 111 | 1 | int ret = 0; | |
| 112 | |||
| 113 |
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1 | if (s->second) { |
| 114 | 1 | *out_pts = s->second->pts += pts; | |
| 115 | 1 | extract_field(s->second, s->nb_planes, !!(s->second->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST)); | |
| 116 | 1 | ret = ff_filter_frame(outlink, s->second); | |
| 117 | 1 | s->second = NULL; | |
| 118 | } | ||
| 119 | |||
| 120 | 1 | return ret; | |
| 121 | } | ||
| 122 | |||
| 123 | 101 | static int activate(AVFilterContext *ctx) | |
| 124 | { | ||
| 125 | 101 | AVFilterLink *inlink = ctx->inputs[0]; | |
| 126 | 101 | AVFilterLink *outlink = ctx->outputs[0]; | |
| 127 | AVFrame *in; | ||
| 128 | int64_t pts; | ||
| 129 | int ret, status; | ||
| 130 | |||
| 131 |
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101 | FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink); |
| 132 | |||
| 133 | 101 | ret = ff_inlink_consume_frame(inlink, &in); | |
| 134 |
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101 | if (ret < 0) |
| 135 | ✗ | return ret; | |
| 136 |
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101 | if (ret > 0) |
| 137 | 50 | return filter_frame(inlink, in); | |
| 138 | |||
| 139 |
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51 | if (ff_inlink_acknowledge_status(inlink, &status, &pts)) { |
| 140 |
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1 | if (status == AVERROR_EOF) { |
| 141 | 1 | int64_t out_pts = pts; | |
| 142 | |||
| 143 | 1 | ret = flush_frame(outlink, pts, &out_pts); | |
| 144 | 1 | ff_outlink_set_status(outlink, status, out_pts); | |
| 145 | 1 | return ret; | |
| 146 | } | ||
| 147 | } | ||
| 148 | |||
| 149 |
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50 | FF_FILTER_FORWARD_WANTED(outlink, inlink); |
| 150 | |||
| 151 | ✗ | return FFERROR_NOT_READY; | |
| 152 | } | ||
| 153 | |||
| 154 | 2 | static av_cold void uninit(AVFilterContext *ctx) | |
| 155 | { | ||
| 156 | 2 | SeparateFieldsContext *s = ctx->priv; | |
| 157 | |||
| 158 | 2 | av_frame_free(&s->second); | |
| 159 | 2 | } | |
| 160 | |||
| 161 | static const AVFilterPad separatefields_outputs[] = { | ||
| 162 | { | ||
| 163 | .name = "default", | ||
| 164 | .type = AVMEDIA_TYPE_VIDEO, | ||
| 165 | .config_props = config_props_output, | ||
| 166 | }, | ||
| 167 | }; | ||
| 168 | |||
| 169 | const FFFilter ff_vf_separatefields = { | ||
| 170 | .p.name = "separatefields", | ||
| 171 | .p.description = NULL_IF_CONFIG_SMALL("Split input video frames into fields."), | ||
| 172 | .priv_size = sizeof(SeparateFieldsContext), | ||
| 173 | .activate = activate, | ||
| 174 | .uninit = uninit, | ||
| 175 | FILTER_INPUTS(ff_video_default_filterpad), | ||
| 176 | FILTER_OUTPUTS(separatefields_outputs), | ||
| 177 | }; | ||
| 178 |