a247ac640d
Given that the AVCodec.next pointer has now been removed, most of the AVCodecs are not modified at all any more and can therefore be made const (as this patch does); the only exceptions are the very few codecs for external libraries that have a init_static_data callback. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com> Signed-off-by: James Almer <jamrial@gmail.com>
114 lines
3.2 KiB
C
114 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_packet2(avctx, pkt, mw.size, 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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const 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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.wrapper_name = "libwebp",
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};
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