blob: 0bcf628e58076080e9896921c836829d41dcf865
| 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 (WebPEncode API) |
| 25 | */ |
| 26 | |
| 27 | #include "libwebpenc_common.h" |
| 28 | |
| 29 | typedef LibWebPContextCommon LibWebPContext; |
| 30 | |
| 31 | static av_cold int libwebp_encode_init(AVCodecContext *avctx) |
| 32 | { |
| 33 | return ff_libwebp_encode_init_common(avctx); |
| 34 | } |
| 35 | |
| 36 | static int libwebp_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
| 37 | const AVFrame *frame, int *got_packet) |
| 38 | { |
| 39 | LibWebPContext *s = avctx->priv_data; |
| 40 | WebPPicture *pic = NULL; |
| 41 | AVFrame *alt_frame = NULL; |
| 42 | WebPMemoryWriter mw = { 0 }; |
| 43 | |
| 44 | int ret = ff_libwebp_get_frame(avctx, s, frame, &alt_frame, &pic); |
| 45 | if (ret < 0) |
| 46 | goto end; |
| 47 | |
| 48 | WebPMemoryWriterInit(&mw); |
| 49 | pic->custom_ptr = &mw; |
| 50 | pic->writer = WebPMemoryWrite; |
| 51 | |
| 52 | ret = WebPEncode(&s->config, pic); |
| 53 | if (!ret) { |
| 54 | av_log(avctx, AV_LOG_ERROR, "WebPEncode() failed with error: %d\n", |
| 55 | pic->error_code); |
| 56 | ret = ff_libwebp_error_to_averror(pic->error_code); |
| 57 | goto end; |
| 58 | } |
| 59 | |
| 60 | ret = ff_alloc_packet2(avctx, pkt, mw.size, mw.size); |
| 61 | if (ret < 0) |
| 62 | goto end; |
| 63 | memcpy(pkt->data, mw.mem, mw.size); |
| 64 | |
| 65 | pkt->flags |= AV_PKT_FLAG_KEY; |
| 66 | *got_packet = 1; |
| 67 | |
| 68 | end: |
| 69 | #if (WEBP_ENCODER_ABI_VERSION > 0x0203) |
| 70 | WebPMemoryWriterClear(&mw); |
| 71 | #else |
| 72 | free(mw.mem); /* must use free() according to libwebp documentation */ |
| 73 | #endif |
| 74 | WebPPictureFree(pic); |
| 75 | av_freep(&pic); |
| 76 | av_frame_free(&alt_frame); |
| 77 | |
| 78 | return ret; |
| 79 | } |
| 80 | |
| 81 | static int libwebp_encode_close(AVCodecContext *avctx) |
| 82 | { |
| 83 | LibWebPContextCommon *s = avctx->priv_data; |
| 84 | av_frame_free(&s->ref); |
| 85 | |
| 86 | return 0; |
| 87 | } |
| 88 | |
| 89 | static const AVClass class = { |
| 90 | .class_name = "libwebp", |
| 91 | .item_name = av_default_item_name, |
| 92 | .option = options, |
| 93 | .version = LIBAVUTIL_VERSION_INT, |
| 94 | }; |
| 95 | |
| 96 | AVCodec ff_libwebp_encoder = { |
| 97 | .name = "libwebp", |
| 98 | .long_name = NULL_IF_CONFIG_SMALL("libwebp WebP image"), |
| 99 | .type = AVMEDIA_TYPE_VIDEO, |
| 100 | .id = AV_CODEC_ID_WEBP, |
| 101 | .priv_data_size = sizeof(LibWebPContext), |
| 102 | .init = libwebp_encode_init, |
| 103 | .encode2 = libwebp_encode_frame, |
| 104 | .close = libwebp_encode_close, |
| 105 | .pix_fmts = (const enum AVPixelFormat[]) { |
| 106 | AV_PIX_FMT_RGB32, |
| 107 | AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P, |
| 108 | AV_PIX_FMT_NONE |
| 109 | }, |
| 110 | .priv_class = &class, |
| 111 | .defaults = libwebp_defaults, |
| 112 | }; |
| 113 |