mirror of https://git.ffmpeg.org/ffmpeg.git
113 lines
3.2 KiB
C
113 lines
3.2 KiB
C
/*
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* WebP encoding support via libwebp
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* Copyright (c) 2013 Justin Ruggles <justin.ruggles@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* WebP encoder using libwebp (WebPEncode API)
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*/
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#include "libwebpenc_common.h"
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typedef LibWebPContextCommon LibWebPContext;
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static av_cold int libwebp_encode_init(AVCodecContext *avctx)
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{
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return ff_libwebp_encode_init_common(avctx);
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}
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static int libwebp_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *frame, int *got_packet)
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{
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LibWebPContext *s = avctx->priv_data;
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WebPPicture *pic = NULL;
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AVFrame *alt_frame = NULL;
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WebPMemoryWriter mw = { 0 };
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int ret = ff_libwebp_get_frame(avctx, s, frame, &alt_frame, &pic);
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if (ret < 0)
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goto end;
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WebPMemoryWriterInit(&mw);
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pic->custom_ptr = &mw;
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pic->writer = WebPMemoryWrite;
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ret = WebPEncode(&s->config, pic);
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if (!ret) {
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av_log(avctx, AV_LOG_ERROR, "WebPEncode() failed with error: %d\n",
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pic->error_code);
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ret = ff_libwebp_error_to_averror(pic->error_code);
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goto end;
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}
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ret = ff_alloc_packet(pkt, mw.size);
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if (ret < 0)
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goto end;
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memcpy(pkt->data, mw.mem, mw.size);
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pkt->flags |= AV_PKT_FLAG_KEY;
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*got_packet = 1;
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end:
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#if (WEBP_ENCODER_ABI_VERSION > 0x0203)
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WebPMemoryWriterClear(&mw);
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#else
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free(mw.mem); /* must use free() according to libwebp documentation */
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#endif
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WebPPictureFree(pic);
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av_freep(&pic);
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av_frame_free(&alt_frame);
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return ret;
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}
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static int libwebp_encode_close(AVCodecContext *avctx)
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{
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LibWebPContextCommon *s = avctx->priv_data;
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av_frame_free(&s->ref);
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return 0;
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}
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static const AVClass class = {
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.class_name = "libwebp",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVCodec ff_libwebp_encoder = {
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.name = "libwebp",
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.long_name = NULL_IF_CONFIG_SMALL("libwebp WebP image"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_WEBP,
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.priv_data_size = sizeof(LibWebPContext),
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.init = libwebp_encode_init,
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.encode2 = libwebp_encode_frame,
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.close = libwebp_encode_close,
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.pix_fmts = (const enum AVPixelFormat[]) {
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AV_PIX_FMT_RGB32,
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P,
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AV_PIX_FMT_NONE
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},
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.priv_class = &class,
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.defaults = libwebp_defaults,
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};
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