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105 lines
3.1 KiB
105 lines
3.1 KiB
/* |
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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 "codec_internal.h" |
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#include "encode.h" |
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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_get_encode_buffer(avctx, pkt, mw.size, 0); |
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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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*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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const FFCodec ff_libwebp_encoder = { |
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.p.name = "libwebp", |
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.p.long_name = NULL_IF_CONFIG_SMALL("libwebp WebP image"), |
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.p.type = AVMEDIA_TYPE_VIDEO, |
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.p.id = AV_CODEC_ID_WEBP, |
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.p.capabilities = AV_CODEC_CAP_DR1, |
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.p.pix_fmts = ff_libwebpenc_pix_fmts, |
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.p.priv_class = &ff_libwebpenc_class, |
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.p.wrapper_name = "libwebp", |
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.caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE, |
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.priv_data_size = sizeof(LibWebPContext), |
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.defaults = ff_libwebp_defaults, |
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.init = libwebp_encode_init, |
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FF_CODEC_ENCODE_CB(libwebp_encode_frame), |
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.close = libwebp_encode_close, |
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};
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