mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
/*
|
|
* Radiance HDR 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
|
|
* Radiance HDR parser
|
|
*/
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "parser.h"
|
|
|
|
typedef struct HDRParseContext {
|
|
ParseContext pc;
|
|
} HDRParseContext;
|
|
|
|
static int hdr_parse(AVCodecParserContext *s, AVCodecContext *avctx,
|
|
const uint8_t **poutbuf, int *poutbuf_size,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
HDRParseContext *ipc = s->priv_data;
|
|
uint64_t state = ipc->pc.state64;
|
|
int next = END_NOT_FOUND, i = 0;
|
|
|
|
*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 == AV_RB64("ADIANCE\n") && (i > 10 || ipc->pc.index > 10)) {
|
|
next = i - 10;
|
|
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;
|
|
|
|
s->pict_type = AV_PICTURE_TYPE_I;
|
|
s->key_frame = 1;
|
|
s->duration = 1;
|
|
|
|
return next;
|
|
}
|
|
|
|
const AVCodecParser ff_hdr_parser = {
|
|
.codec_ids = { AV_CODEC_ID_RADIANCE_HDR },
|
|
.priv_data_size = sizeof(HDRParseContext),
|
|
.parser_parse = hdr_parse,
|
|
.parser_close = ff_parse_close,
|
|
};
|