diff options
author | Paul B Mahol <onemda@gmail.com> | 2022-05-31 13:33:54 +0300 |
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committer | Paul B Mahol <onemda@gmail.com> | 2022-06-05 14:06:54 +0300 |
commit | 973fab565378cbdd0712977152a66f5b17938d51 (patch) | |
tree | 720f0b9c6e8f3cf64c4134d0ae78a5e30d97a577 /libavcodec/qoi_parser.c | |
parent | c6364b711bad1fe2fbd90e5b2798f87080ddf5ea (diff) |
avcodec: add QOI decoder and demuxer and parser and encoder and muxer
Diffstat (limited to 'libavcodec/qoi_parser.c')
-rw-r--r-- | libavcodec/qoi_parser.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/libavcodec/qoi_parser.c b/libavcodec/qoi_parser.c new file mode 100644 index 0000000000..e5af11e948 --- /dev/null +++ b/libavcodec/qoi_parser.c @@ -0,0 +1,77 @@ +/* + * QOI parser + * Copyright (c) 2022 Paul B Mahol + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * QOI parser + */ + +#include "parser.h" + +typedef struct QOIParseContext { + ParseContext pc; +} QOIParseContext; + +static int qoi_parse(AVCodecParserContext *s, AVCodecContext *avctx, + const uint8_t **poutbuf, int *poutbuf_size, + const uint8_t *buf, int buf_size) +{ + QOIParseContext *ipc = s->priv_data; + uint64_t state = ipc->pc.state64; + int next = END_NOT_FOUND, i = 0; + + s->pict_type = AV_PICTURE_TYPE_NONE; + s->duration = 1; + + *poutbuf_size = 0; + *poutbuf = NULL; + + if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) { + next = buf_size; + } else { + for (; i < buf_size; i++) { + state = (state << 8) | buf[i]; + if (state == 0x01LL) { + next = i + 1; + break; + } + } + + ipc->pc.state64 = state; + if (ff_combine_frame(&ipc->pc, next, &buf, &buf_size) < 0) { + *poutbuf = NULL; + *poutbuf_size = 0; + return buf_size; + } + } + + *poutbuf = buf; + *poutbuf_size = buf_size; + + return next; +} + +const AVCodecParser ff_qoi_parser = { + .codec_ids = { AV_CODEC_ID_QOI }, + .priv_data_size = sizeof(QOIParseContext), + .parser_parse = qoi_parse, + .parser_close = ff_parse_close, +}; |