mirror of https://git.ffmpeg.org/ffmpeg.git
229 lines
6.9 KiB
C
229 lines
6.9 KiB
C
/*
|
|
* Raw TAK demuxer
|
|
* Copyright (c) 2012 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
|
|
*/
|
|
|
|
#include "libavutil/crc.h"
|
|
|
|
#define BITSTREAM_READER_LE
|
|
#include "libavcodec/tak.h"
|
|
|
|
#include "apetag.h"
|
|
#include "avformat.h"
|
|
#include "avio_internal.h"
|
|
#include "internal.h"
|
|
#include "rawdec.h"
|
|
|
|
typedef struct TAKDemuxContext {
|
|
AVClass *class;
|
|
int raw_packet_size;
|
|
int mlast_frame;
|
|
int64_t data_end;
|
|
} TAKDemuxContext;
|
|
|
|
static int tak_probe(const AVProbeData *p)
|
|
{
|
|
if (!memcmp(p->buf, "tBaK", 4))
|
|
return AVPROBE_SCORE_EXTENSION;
|
|
return 0;
|
|
}
|
|
|
|
static unsigned long tak_check_crc(unsigned long checksum, const uint8_t *buf,
|
|
unsigned int len)
|
|
{
|
|
return av_crc(av_crc_get_table(AV_CRC_24_IEEE), checksum, buf, len);
|
|
}
|
|
|
|
static int tak_read_header(AVFormatContext *s)
|
|
{
|
|
TAKDemuxContext *tc = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
GetBitContext gb;
|
|
AVStream *st;
|
|
uint8_t *buffer = NULL;
|
|
int ret;
|
|
|
|
st = avformat_new_stream(s, 0);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codecpar->codec_id = AV_CODEC_ID_TAK;
|
|
st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
|
|
|
|
tc->mlast_frame = 0;
|
|
if (avio_rl32(pb) != MKTAG('t', 'B', 'a', 'K')) {
|
|
avio_seek(pb, -4, SEEK_CUR);
|
|
return 0;
|
|
}
|
|
|
|
while (!avio_feof(pb)) {
|
|
enum TAKMetaDataType type;
|
|
int size;
|
|
|
|
type = avio_r8(pb) & 0x7f;
|
|
size = avio_rl24(pb);
|
|
|
|
switch (type) {
|
|
case TAK_METADATA_STREAMINFO:
|
|
if (st->codecpar->extradata)
|
|
return AVERROR_INVALIDDATA;
|
|
case TAK_METADATA_LAST_FRAME:
|
|
case TAK_METADATA_ENCODER:
|
|
if (size <= 3)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
buffer = av_malloc(size - 3 + AV_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!buffer)
|
|
return AVERROR(ENOMEM);
|
|
memset(buffer + size - 3, 0, AV_INPUT_BUFFER_PADDING_SIZE);
|
|
|
|
ffio_init_checksum(pb, tak_check_crc, 0xCE04B7U);
|
|
if (avio_read(pb, buffer, size - 3) != size - 3) {
|
|
av_freep(&buffer);
|
|
return AVERROR(EIO);
|
|
}
|
|
if (ffio_get_checksum(s->pb) != avio_rb24(pb)) {
|
|
av_log(s, AV_LOG_ERROR, "%d metadata block CRC error.\n", type);
|
|
if (s->error_recognition & AV_EF_EXPLODE) {
|
|
av_freep(&buffer);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
|
|
break;
|
|
case TAK_METADATA_MD5: {
|
|
uint8_t md5[16];
|
|
int i;
|
|
|
|
if (size != 19)
|
|
return AVERROR_INVALIDDATA;
|
|
ffio_init_checksum(pb, tak_check_crc, 0xCE04B7U);
|
|
avio_read(pb, md5, 16);
|
|
if (ffio_get_checksum(s->pb) != avio_rb24(pb)) {
|
|
av_log(s, AV_LOG_ERROR, "MD5 metadata block CRC error.\n");
|
|
if (s->error_recognition & AV_EF_EXPLODE)
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
av_log(s, AV_LOG_VERBOSE, "MD5=");
|
|
for (i = 0; i < 16; i++)
|
|
av_log(s, AV_LOG_VERBOSE, "%02x", md5[i]);
|
|
av_log(s, AV_LOG_VERBOSE, "\n");
|
|
break;
|
|
}
|
|
case TAK_METADATA_END: {
|
|
int64_t curpos = avio_tell(pb);
|
|
|
|
if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
|
|
ff_ape_parse_tag(s);
|
|
avio_seek(pb, curpos, SEEK_SET);
|
|
}
|
|
|
|
tc->data_end += curpos;
|
|
return 0;
|
|
}
|
|
default:
|
|
ret = avio_skip(pb, size);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (type == TAK_METADATA_STREAMINFO) {
|
|
TAKStreamInfo ti;
|
|
|
|
ret = avpriv_tak_parse_streaminfo(&ti, buffer, size -3);
|
|
if (ret < 0)
|
|
goto end;
|
|
if (ti.samples > 0)
|
|
st->duration = ti.samples;
|
|
st->codecpar->bits_per_coded_sample = ti.bps;
|
|
if (ti.ch_layout)
|
|
st->codecpar->channel_layout = ti.ch_layout;
|
|
st->codecpar->sample_rate = ti.sample_rate;
|
|
st->codecpar->channels = ti.channels;
|
|
st->start_time = 0;
|
|
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
|
|
st->codecpar->extradata = buffer;
|
|
st->codecpar->extradata_size = size - 3;
|
|
buffer = NULL;
|
|
} else if (type == TAK_METADATA_LAST_FRAME) {
|
|
if (size != 11) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto end;
|
|
}
|
|
init_get_bits8(&gb, buffer, size - 3);
|
|
tc->mlast_frame = 1;
|
|
tc->data_end = get_bits64(&gb, TAK_LAST_FRAME_POS_BITS) +
|
|
get_bits(&gb, TAK_LAST_FRAME_SIZE_BITS);
|
|
av_freep(&buffer);
|
|
} else if (type == TAK_METADATA_ENCODER) {
|
|
init_get_bits8(&gb, buffer, size - 3);
|
|
av_log(s, AV_LOG_VERBOSE, "encoder version: %0X\n",
|
|
get_bits_long(&gb, TAK_ENCODER_VERSION_BITS));
|
|
av_freep(&buffer);
|
|
}
|
|
}
|
|
|
|
return AVERROR_EOF;
|
|
end:
|
|
av_freep(&buffer);
|
|
return ret;
|
|
}
|
|
|
|
static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
TAKDemuxContext *tc = s->priv_data;
|
|
int ret;
|
|
|
|
if (tc->mlast_frame) {
|
|
AVIOContext *pb = s->pb;
|
|
int64_t size, left;
|
|
|
|
left = tc->data_end - avio_tell(pb);
|
|
size = FFMIN(left, 1024);
|
|
if (size <= 0)
|
|
return AVERROR_EOF;
|
|
|
|
ret = av_get_packet(pb, pkt, size);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
pkt->stream_index = 0;
|
|
} else {
|
|
ret = ff_raw_read_partial_packet(s, pkt);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
FF_RAW_DEMUXER_CLASS(tak)
|
|
const AVInputFormat ff_tak_demuxer = {
|
|
.name = "tak",
|
|
.long_name = NULL_IF_CONFIG_SMALL("raw TAK"),
|
|
.priv_data_size = sizeof(TAKDemuxContext),
|
|
.read_probe = tak_probe,
|
|
.read_header = tak_read_header,
|
|
.read_packet = raw_read_packet,
|
|
.flags = AVFMT_GENERIC_INDEX,
|
|
.extensions = "tak",
|
|
.raw_codec_id = AV_CODEC_ID_TAK,
|
|
.priv_class = &tak_demuxer_class,
|
|
};
|