blob: e74e57939e763c2ff8dbeed82465ac926a06de4d
| 1 | /* |
| 2 | * WebP encoding support via libwebp |
| 3 | * Copyright (c) 2013 Justin Ruggles <justin.ruggles@gmail.com> |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 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. |
| 11 | * |
| 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. |
| 16 | * |
| 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 |
| 20 | */ |
| 21 | |
| 22 | /** |
| 23 | * @file |
| 24 | * WebP encoder using libwebp: common structs and methods. |
| 25 | */ |
| 26 | |
| 27 | #ifndef AVCODEC_LIBWEBPENC_COMMON_H |
| 28 | #define AVCODEC_LIBWEBPENC_COMMON_H |
| 29 | |
| 30 | #include <webp/encode.h> |
| 31 | |
| 32 | #include "libavutil/common.h" |
| 33 | #include "libavutil/frame.h" |
| 34 | #include "libavutil/imgutils.h" |
| 35 | #include "libavutil/opt.h" |
| 36 | #include "avcodec.h" |
| 37 | #include "internal.h" |
| 38 | |
| 39 | typedef struct LibWebPContextCommon { |
| 40 | AVClass *class; // class for AVOptions |
| 41 | float quality; // lossy quality 0 - 100 |
| 42 | int lossless; // use lossless encoding |
| 43 | int preset; // configuration preset |
| 44 | int chroma_warning; // chroma linesize mismatch warning has been printed |
| 45 | int conversion_warning; // pixel format conversion warning has been printed |
| 46 | WebPConfig config; // libwebp configuration |
| 47 | AVFrame *ref; |
| 48 | int cr_size; |
| 49 | int cr_threshold; |
| 50 | } LibWebPContextCommon; |
| 51 | |
| 52 | int ff_libwebp_error_to_averror(int err); |
| 53 | |
| 54 | av_cold int ff_libwebp_encode_init_common(AVCodecContext *avctx); |
| 55 | |
| 56 | int ff_libwebp_get_frame(AVCodecContext *avctx, LibWebPContextCommon *s, |
| 57 | const AVFrame *frame, AVFrame **alt_frame_ptr, |
| 58 | WebPPicture **pic_ptr); |
| 59 | |
| 60 | #define OFFSET(x) offsetof(LibWebPContextCommon, x) |
| 61 | #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM |
| 62 | static const AVOption options[] = { |
| 63 | { "lossless", "Use lossless mode", OFFSET(lossless), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, |
| 64 | { "preset", "Configuration preset", OFFSET(preset), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, WEBP_PRESET_TEXT, VE, "preset" }, |
| 65 | { "none", "do not use a preset", 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, 0, 0, VE, "preset" }, |
| 66 | { "default", "default preset", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_DEFAULT }, 0, 0, VE, "preset" }, |
| 67 | { "picture", "digital picture, like portrait, inner shot", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_PICTURE }, 0, 0, VE, "preset" }, |
| 68 | { "photo", "outdoor photograph, with natural lighting", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_PHOTO }, 0, 0, VE, "preset" }, |
| 69 | { "drawing", "hand or line drawing, with high-contrast details", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_DRAWING }, 0, 0, VE, "preset" }, |
| 70 | { "icon", "small-sized colorful images", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_ICON }, 0, 0, VE, "preset" }, |
| 71 | { "text", "text-like", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_TEXT }, 0, 0, VE, "preset" }, |
| 72 | { "cr_threshold","Conditional replenishment threshold", OFFSET(cr_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE }, |
| 73 | { "cr_size" ,"Conditional replenishment block size", OFFSET(cr_size) , AV_OPT_TYPE_INT, { .i64 = 16 }, 0, 256, VE }, |
| 74 | { "quality" ,"Quality", OFFSET(quality), AV_OPT_TYPE_FLOAT, { .dbl = 75 }, 0, 100, VE }, |
| 75 | { NULL }, |
| 76 | }; |
| 77 | |
| 78 | static const AVCodecDefault libwebp_defaults[] = { |
| 79 | { "compression_level", "4" }, |
| 80 | { "global_quality", "-1" }, |
| 81 | { NULL }, |
| 82 | }; |
| 83 | |
| 84 | #endif /* AVCODEC_LIBWEBPENC_COMMON_H */ |
| 85 |