| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2007 Bobby Bingham | ||
| 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 | /** | ||
| 22 | * @file | ||
| 23 | * video vertical flip filter | ||
| 24 | */ | ||
| 25 | |||
| 26 | #include "libavutil/internal.h" | ||
| 27 | #include "libavutil/pixdesc.h" | ||
| 28 | #include "avfilter.h" | ||
| 29 | #include "filters.h" | ||
| 30 | #include "video.h" | ||
| 31 | |||
| 32 | typedef struct FlipContext { | ||
| 33 | int vsub; ///< vertical chroma subsampling | ||
| 34 | int bayer; | ||
| 35 | } FlipContext; | ||
| 36 | |||
| 37 | 193 | static int config_input(AVFilterLink *link) | |
| 38 | { | ||
| 39 | 193 | FlipContext *flip = link->dst->priv; | |
| 40 | 193 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format); | |
| 41 | |||
| 42 | 193 | flip->vsub = desc->log2_chroma_h; | |
| 43 | 193 | flip->bayer = !!(desc->flags & AV_PIX_FMT_FLAG_BAYER); | |
| 44 | |||
| 45 | 193 | return 0; | |
| 46 | } | ||
| 47 | |||
| 48 | 193 | static AVFrame *get_video_buffer(AVFilterLink *link, int w, int h) | |
| 49 | { | ||
| 50 | 193 | FlipContext *flip = link->dst->priv; | |
| 51 | AVFrame *frame; | ||
| 52 | int i; | ||
| 53 | |||
| 54 | 193 | frame = ff_get_video_buffer(link->dst->outputs[0], w, h); | |
| 55 |
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193 | if (!frame) |
| 56 | ✗ | return NULL; | |
| 57 | |||
| 58 |
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| 59 |
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772 | int vsub = i == 1 || i == 2 ? flip->vsub : 0; |
| 60 | 772 | int height = AV_CEIL_RSHIFT(h, vsub); | |
| 61 | |||
| 62 |
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772 | if (frame->data[i]) { |
| 63 | 459 | frame->data[i] += (height - 1) * frame->linesize[i]; | |
| 64 | 459 | frame->linesize[i] = -frame->linesize[i]; | |
| 65 | } | ||
| 66 | } | ||
| 67 | |||
| 68 | 193 | return frame; | |
| 69 | } | ||
| 70 | |||
| 71 | ✗ | static int flip_bayer(AVFilterLink *link, AVFrame *in) | |
| 72 | { | ||
| 73 | ✗ | AVFilterContext *ctx = link->dst; | |
| 74 | ✗ | AVFilterLink *outlink = ctx->outputs[0]; | |
| 75 | AVFrame *out; | ||
| 76 | ✗ | uint8_t *inrow = in->data[0], *outrow; | |
| 77 | ✗ | int i, width = outlink->w << (av_pix_fmt_desc_get(link->format)->comp[0].step > 1); | |
| 78 | ✗ | if (outlink->h & 1) { | |
| 79 | ✗ | av_log(ctx, AV_LOG_ERROR, "Bayer vertical flip needs even height\n"); | |
| 80 | ✗ | return AVERROR_INVALIDDATA; | |
| 81 | } | ||
| 82 | |||
| 83 | ✗ | out = ff_get_video_buffer(outlink, outlink->w, outlink->h); | |
| 84 | ✗ | if (!out) { | |
| 85 | ✗ | av_frame_free(&in); | |
| 86 | ✗ | return AVERROR(ENOMEM); | |
| 87 | } | ||
| 88 | ✗ | av_frame_copy_props(out, in); | |
| 89 | ✗ | outrow = out->data[0] + out->linesize[0] * (outlink->h - 2); | |
| 90 | ✗ | for (i = 0; i < outlink->h >> 1; i++) { | |
| 91 | ✗ | memcpy(outrow, inrow, width); | |
| 92 | ✗ | memcpy(outrow + out->linesize[0], inrow + in->linesize[0], width); | |
| 93 | ✗ | inrow += 2 * in->linesize[0]; | |
| 94 | ✗ | outrow -= 2 * out->linesize[0]; | |
| 95 | } | ||
| 96 | ✗ | av_frame_free(&in); | |
| 97 | ✗ | return ff_filter_frame(outlink, out); | |
| 98 | } | ||
| 99 | |||
| 100 | 229 | static int filter_frame(AVFilterLink *link, AVFrame *frame) | |
| 101 | { | ||
| 102 | 229 | FlipContext *flip = link->dst->priv; | |
| 103 | int i; | ||
| 104 | |||
| 105 |
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229 | if (flip->bayer) |
| 106 | ✗ | return flip_bayer(link, frame); | |
| 107 | |||
| 108 |
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916 | int vsub = i == 1 || i == 2 ? flip->vsub : 0; |
| 110 | 916 | int height = AV_CEIL_RSHIFT(link->h, vsub); | |
| 111 | |||
| 112 |
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916 | if (frame->data[i]) { |
| 113 | 567 | frame->data[i] += (height - 1) * frame->linesize[i]; | |
| 114 | 567 | frame->linesize[i] = -frame->linesize[i]; | |
| 115 | } | ||
| 116 | } | ||
| 117 | |||
| 118 | 229 | return ff_filter_frame(link->dst->outputs[0], frame); | |
| 119 | } | ||
| 120 | static const AVFilterPad avfilter_vf_vflip_inputs[] = { | ||
| 121 | { | ||
| 122 | .name = "default", | ||
| 123 | .type = AVMEDIA_TYPE_VIDEO, | ||
| 124 | .get_buffer.video = get_video_buffer, | ||
| 125 | .filter_frame = filter_frame, | ||
| 126 | .config_props = config_input, | ||
| 127 | }, | ||
| 128 | }; | ||
| 129 | |||
| 130 | const AVFilter ff_vf_vflip = { | ||
| 131 | .name = "vflip", | ||
| 132 | .description = NULL_IF_CONFIG_SMALL("Flip the input video vertically."), | ||
| 133 | .priv_size = sizeof(FlipContext), | ||
| 134 | FILTER_INPUTS(avfilter_vf_vflip_inputs), | ||
| 135 | FILTER_OUTPUTS(ff_video_default_filterpad), | ||
| 136 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, | ||
| 137 | }; | ||
| 138 |