2 * WebP encoding support via libwebp
3 * Copyright (c) 2013 Justin Ruggles <justin.ruggles@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
24 * WebP encoder using libwebp (WebPEncode API)
27 #include "codec_internal.h"
29 #include "libwebpenc_common.h"
31 typedef LibWebPContextCommon LibWebPContext;
33 static av_cold int libwebp_encode_init(AVCodecContext *avctx)
35 return ff_libwebp_encode_init_common(avctx);
38 static int libwebp_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
39 const AVFrame *frame, int *got_packet)
41 LibWebPContext *s = avctx->priv_data;
42 WebPPicture *pic = NULL;
43 AVFrame *alt_frame = NULL;
44 WebPMemoryWriter mw = { 0 };
46 int ret = ff_libwebp_get_frame(avctx, s, frame, &alt_frame, &pic);
50 WebPMemoryWriterInit(&mw);
51 pic->custom_ptr = &mw;
52 pic->writer = WebPMemoryWrite;
54 ret = WebPEncode(&s->config, pic);
56 av_log(avctx, AV_LOG_ERROR, "WebPEncode() failed with error: %d\n",
58 ret = ff_libwebp_error_to_averror(pic->error_code);
62 ret = ff_get_encode_buffer(avctx, pkt, mw.size, 0);
65 memcpy(pkt->data, mw.mem, mw.size);
70 #if (WEBP_ENCODER_ABI_VERSION > 0x0203)
71 WebPMemoryWriterClear(&mw);
73 free(mw.mem); /* must use free() according to libwebp documentation */
77 av_frame_free(&alt_frame);
82 static int libwebp_encode_close(AVCodecContext *avctx)
84 LibWebPContextCommon *s = avctx->priv_data;
85 av_frame_free(&s->ref);
90 const FFCodec ff_libwebp_encoder = {
92 .p.long_name = NULL_IF_CONFIG_SMALL("libwebp WebP image"),
93 .p.type = AVMEDIA_TYPE_VIDEO,
94 .p.id = AV_CODEC_ID_WEBP,
95 .p.capabilities = AV_CODEC_CAP_DR1,
96 .p.pix_fmts = ff_libwebpenc_pix_fmts,
97 .p.priv_class = &ff_libwebpenc_class,
98 .p.wrapper_name = "libwebp",
99 .priv_data_size = sizeof(LibWebPContext),
100 .defaults = ff_libwebp_defaults,
101 .init = libwebp_encode_init,
102 FF_CODEC_ENCODE_CB(libwebp_encode_frame),
103 .close = libwebp_encode_close,