mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-05 05:28:25 -05:00
170 lines
4.7 KiB
C
Executable File
170 lines
4.7 KiB
C
Executable File
/*
|
|
* Cryo Interactive Entertainment HNM4 demuxer
|
|
*
|
|
* Copyright (c) 2012 David Kment
|
|
*
|
|
* 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 <inttypes.h>
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
#define HNM4_TAG MKTAG('H', 'N', 'M', '4')
|
|
|
|
#define HNM4_SAMPLE_RATE 22050
|
|
#define HNM4_FRAME_FPS 24
|
|
|
|
#define HNM4_CHUNK_ID_PL 19536
|
|
#define HNM4_CHUNK_ID_IZ 23113
|
|
#define HNM4_CHUNK_ID_IU 21833
|
|
#define HNM4_CHUNK_ID_SD 17491
|
|
|
|
typedef struct Hnm4DemuxContext {
|
|
uint32_t frames;
|
|
uint32_t currentframe;
|
|
uint32_t superchunk_remaining;
|
|
} Hnm4DemuxContext;
|
|
|
|
static int hnm_probe(const AVProbeData *p)
|
|
{
|
|
if (p->buf_size < 4)
|
|
return 0;
|
|
|
|
// check for HNM4 header.
|
|
// currently only HNM v4/v4A is supported
|
|
if (AV_RL32(&p->buf[0]) == HNM4_TAG)
|
|
return AVPROBE_SCORE_MAX;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hnm_read_header(AVFormatContext *s)
|
|
{
|
|
Hnm4DemuxContext *hnm = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
unsigned width, height;
|
|
AVStream *vst;
|
|
int ret;
|
|
|
|
avio_skip(pb, 8);
|
|
width = avio_rl16(pb);
|
|
height = avio_rl16(pb);
|
|
avio_rl32(pb); // filesize
|
|
hnm->frames = avio_rl32(pb);
|
|
avio_skip(pb, 44);
|
|
|
|
if (width < 256 || width > 640 ||
|
|
height < 150 || height > 480) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"invalid resolution: %ux%u\n", width, height);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (!(vst = avformat_new_stream(s, NULL)))
|
|
return AVERROR(ENOMEM);
|
|
|
|
vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
vst->codecpar->codec_id = AV_CODEC_ID_HNM4_VIDEO;
|
|
vst->codecpar->codec_tag = 0;
|
|
vst->codecpar->width = width;
|
|
vst->codecpar->height = height;
|
|
if ((ret = ff_alloc_extradata(vst->codecpar, 1)) < 0)
|
|
return ret;
|
|
|
|
// TODO: find a better way to detect HNM4A
|
|
vst->codecpar->extradata[0] = width == 640 ? 0x4a : 0x40;
|
|
|
|
vst->start_time = 0;
|
|
|
|
avpriv_set_pts_info(vst, 33, 1, HNM4_FRAME_FPS);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hnm_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
Hnm4DemuxContext *hnm = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int ret = 0;
|
|
|
|
uint32_t superchunk_size, chunk_size;
|
|
uint16_t chunk_id;
|
|
|
|
if (hnm->currentframe == hnm->frames || pb->eof_reached)
|
|
return AVERROR_EOF;
|
|
|
|
if (hnm->superchunk_remaining == 0) {
|
|
/* parse next superchunk */
|
|
superchunk_size = avio_rl24(pb);
|
|
avio_skip(pb, 1);
|
|
|
|
hnm->superchunk_remaining = superchunk_size - 4;
|
|
}
|
|
|
|
chunk_size = avio_rl24(pb);
|
|
avio_skip(pb, 1);
|
|
chunk_id = avio_rl16(pb);
|
|
avio_skip(pb, 2);
|
|
|
|
if (chunk_size > hnm->superchunk_remaining || !chunk_size) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"invalid chunk size: %"PRIu32", offset: %"PRId64"\n",
|
|
chunk_size, avio_tell(pb));
|
|
avio_skip(pb, hnm->superchunk_remaining - 8);
|
|
hnm->superchunk_remaining = 0;
|
|
}
|
|
|
|
switch (chunk_id) {
|
|
case HNM4_CHUNK_ID_PL:
|
|
case HNM4_CHUNK_ID_IZ:
|
|
case HNM4_CHUNK_ID_IU:
|
|
avio_seek(pb, -8, SEEK_CUR);
|
|
ret += av_get_packet(pb, pkt, chunk_size);
|
|
hnm->superchunk_remaining -= chunk_size;
|
|
if (chunk_id == HNM4_CHUNK_ID_IZ || chunk_id == HNM4_CHUNK_ID_IU)
|
|
hnm->currentframe++;
|
|
break;
|
|
|
|
case HNM4_CHUNK_ID_SD:
|
|
avio_skip(pb, chunk_size - 8);
|
|
hnm->superchunk_remaining -= chunk_size;
|
|
break;
|
|
|
|
default:
|
|
av_log(s, AV_LOG_WARNING, "unknown chunk found: %"PRIu16", offset: %"PRId64"\n",
|
|
chunk_id, avio_tell(pb));
|
|
avio_skip(pb, chunk_size - 8);
|
|
hnm->superchunk_remaining -= chunk_size;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
AVInputFormat ff_hnm_demuxer = {
|
|
.name = "hnm",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Cryo HNM v4"),
|
|
.priv_data_size = sizeof(Hnm4DemuxContext),
|
|
.read_probe = hnm_probe,
|
|
.read_header = hnm_read_header,
|
|
.read_packet = hnm_read_packet,
|
|
.flags = AVFMT_NO_BYTE_SEEK | AVFMT_NOGENSEARCH | AVFMT_NOBINSEARCH
|
|
};
|