gx
dcecd42de4
Snapshot FFmpeg n7.1 (release tag) с применённым patch'ем для cuframes input format. Используется как FFMPEG_REPO_OVERRIDE в NickM-27/FFmpeg-Builds fork для статической сборки patched binary под Frigate (Debian 12 / glibc 2.36). Apply changes: + libavformat/cuframesdec.c (новый — реализация демуксера) M libavformat/Makefile (CONFIG_CUFRAMES_DEMUXER target) M libavformat/allformats.c (extern declaration) M configure (--enable-libcuframes option + dep check) Patch source: https://git.goldix.org/gx/cuframes (filter/ffmpeg-7.1-cuframes-demuxer.patch) History сброшена (snapshot вместо fork) потому что upstream shallow clone не позволял push в gitea. Полная история FFmpeg — на github.com/FFmpeg/FFmpeg n7.1.
117 lines
3.3 KiB
C
117 lines
3.3 KiB
C
/*
|
|
* DPX parser
|
|
* Copyright (c) 2013 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
|
|
* DPX parser
|
|
*/
|
|
|
|
#include "libavutil/bswap.h"
|
|
#include "libavutil/common.h"
|
|
|
|
#include "parser.h"
|
|
|
|
typedef struct DPXParseContext {
|
|
ParseContext pc;
|
|
uint32_t index;
|
|
uint32_t fsize;
|
|
uint32_t remaining_size;
|
|
int is_be;
|
|
} DPXParseContext;
|
|
|
|
static int dpx_parse(AVCodecParserContext *s, AVCodecContext *avctx,
|
|
const uint8_t **poutbuf, int *poutbuf_size,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
DPXParseContext *d = s->priv_data;
|
|
uint32_t state = d->pc.state;
|
|
int next = END_NOT_FOUND;
|
|
int i = 0;
|
|
|
|
s->pict_type = AV_PICTURE_TYPE_I;
|
|
|
|
*poutbuf_size = 0;
|
|
if (buf_size == 0)
|
|
next = 0;
|
|
|
|
if (!d->pc.frame_start_found) {
|
|
for (; i < buf_size; i++) {
|
|
state = (state << 8) | buf[i];
|
|
if (state == MKBETAG('S','D','P','X') ||
|
|
state == MKTAG('S','D','P','X')) {
|
|
d->pc.frame_start_found = 1;
|
|
d->is_be = state == MKBETAG('S','D','P','X');
|
|
d->index = 0;
|
|
break;
|
|
}
|
|
}
|
|
d->pc.state = state;
|
|
} else {
|
|
if (d->remaining_size) {
|
|
i = FFMIN(d->remaining_size, buf_size);
|
|
d->remaining_size -= i;
|
|
if (d->remaining_size)
|
|
goto flush;
|
|
}
|
|
}
|
|
|
|
for (; d->pc.frame_start_found && i < buf_size; i++) {
|
|
d->pc.state = (d->pc.state << 8) | buf[i];
|
|
d->index++;
|
|
if (d->index == 17) {
|
|
d->fsize = d->is_be ? d->pc.state : av_bswap32(d->pc.state);
|
|
if (d->fsize <= 1664) {
|
|
d->pc.frame_start_found = 0;
|
|
goto flush;
|
|
}
|
|
if (d->fsize > buf_size - i + 19)
|
|
d->remaining_size = d->fsize - buf_size + i - 19;
|
|
else
|
|
i += d->fsize - 19;
|
|
|
|
break;
|
|
} else if (d->index > 17) {
|
|
if (d->pc.state == MKBETAG('S','D','P','X') ||
|
|
d->pc.state == MKTAG('S','D','P','X')) {
|
|
next = i - 3;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
flush:
|
|
if (ff_combine_frame(&d->pc, next, &buf, &buf_size) < 0)
|
|
return buf_size;
|
|
|
|
d->pc.frame_start_found = 0;
|
|
|
|
*poutbuf = buf;
|
|
*poutbuf_size = buf_size;
|
|
return next;
|
|
}
|
|
|
|
const AVCodecParser ff_dpx_parser = {
|
|
.codec_ids = { AV_CODEC_ID_DPX },
|
|
.priv_data_size = sizeof(DPXParseContext),
|
|
.parser_parse = dpx_parse,
|
|
.parser_close = ff_parse_close,
|
|
};
|