mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-23 11:19:55 +00:00
3a2d1465c8
* commit '2d60444331fca1910510038dd3817bea885c2367': dsputil: Split motion estimation compare bits off into their own context Conflicts: configure libavcodec/Makefile libavcodec/arm/Makefile libavcodec/dvenc.c libavcodec/error_resilience.c libavcodec/h264.h libavcodec/h264_slice.c libavcodec/me_cmp.c libavcodec/me_cmp.h libavcodec/motion_est.c libavcodec/motion_est_template.c libavcodec/mpeg4videoenc.c libavcodec/mpegvideo.c libavcodec/mpegvideo_enc.c libavcodec/x86/Makefile libavcodec/x86/me_cmp_init.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
116 lines
3.4 KiB
C
116 lines
3.4 KiB
C
/*
|
|
* DVD navigation block parser for FFmpeg
|
|
* Copyright (c) 2013 The FFmpeg Project
|
|
*
|
|
* 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
|
|
*/
|
|
#include "avcodec.h"
|
|
#include "get_bits.h"
|
|
#include "parser.h"
|
|
|
|
#define PCI_SIZE 980
|
|
#define DSI_SIZE 1018
|
|
|
|
/* parser definition */
|
|
typedef struct DVDNavParseContext {
|
|
uint32_t lba;
|
|
uint8_t buffer[PCI_SIZE+DSI_SIZE];
|
|
int copied;
|
|
} DVDNavParseContext;
|
|
|
|
static av_cold int dvd_nav_parse_init(AVCodecParserContext *s)
|
|
{
|
|
DVDNavParseContext *pc = s->priv_data;
|
|
|
|
pc->lba = 0xFFFFFFFF;
|
|
pc->copied = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int dvd_nav_parse(AVCodecParserContext *s,
|
|
AVCodecContext *avctx,
|
|
const uint8_t **poutbuf, int *poutbuf_size,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
DVDNavParseContext *pc1 = s->priv_data;
|
|
int lastPacket = 0;
|
|
int valid = 0;
|
|
|
|
s->pict_type = AV_PICTURE_TYPE_NONE;
|
|
|
|
avctx->time_base.num = 1;
|
|
avctx->time_base.den = 90000;
|
|
|
|
if (buf && buf_size) {
|
|
switch(buf[0]) {
|
|
case 0x00:
|
|
if (buf_size == PCI_SIZE) {
|
|
/* PCI */
|
|
uint32_t lba = AV_RB32(&buf[0x01]);
|
|
uint32_t startpts = AV_RB32(&buf[0x0D]);
|
|
uint32_t endpts = AV_RB32(&buf[0x11]);
|
|
|
|
if (endpts > startpts) {
|
|
pc1->lba = lba;
|
|
s->pts = (int64_t)startpts;
|
|
s->duration = endpts - startpts;
|
|
|
|
memcpy(pc1->buffer, buf, PCI_SIZE);
|
|
pc1->copied = PCI_SIZE;
|
|
valid = 1;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 0x01:
|
|
if ((buf_size == DSI_SIZE) && (pc1->copied == PCI_SIZE)) {
|
|
/* DSI */
|
|
uint32_t lba = AV_RB32(&buf[0x05]);
|
|
|
|
if (lba == pc1->lba) {
|
|
memcpy(pc1->buffer + pc1->copied, buf, DSI_SIZE);
|
|
lastPacket = 1;
|
|
valid = 1;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!valid || lastPacket) {
|
|
pc1->copied = 0;
|
|
pc1->lba = 0xFFFFFFFF;
|
|
}
|
|
|
|
if (lastPacket) {
|
|
*poutbuf = pc1->buffer;
|
|
*poutbuf_size = sizeof(pc1->buffer);
|
|
} else {
|
|
*poutbuf = NULL;
|
|
*poutbuf_size = 0;
|
|
}
|
|
|
|
return buf_size;
|
|
}
|
|
|
|
AVCodecParser ff_dvd_nav_parser = {
|
|
.codec_ids = { AV_CODEC_ID_DVD_NAV },
|
|
.priv_data_size = sizeof(DVDNavParseContext),
|
|
.parser_init = dvd_nav_parse_init,
|
|
.parser_parse = dvd_nav_parse,
|
|
};
|