|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#include "libavutil/intreadwrite.h" |
|
#include "avformat.h" |
|
#include "demux.h" |
|
#include "internal.h" |
|
#include "rawdec.h" |
|
|
|
static int apac_probe(const AVProbeData *p) |
|
{ |
|
if (AV_RB32(p->buf) == MKBETAG('A','P','A','C') && |
|
AV_RB32(p->buf + 8) == MKBETAG('P','R','O','F') && |
|
AV_RB32(p->buf + 12) == MKBETAG('N','A','D',' ')) |
|
return AVPROBE_SCORE_MAX; |
|
|
|
return 0; |
|
} |
|
|
|
static int apac_read_header(AVFormatContext *s) |
|
{ |
|
AVIOContext *pb = s->pb; |
|
uint32_t chunk_size; |
|
AVStream *st; |
|
int64_t pos; |
|
|
|
avio_skip(pb, 16); |
|
chunk_size = avio_rl32(pb); |
|
avio_skip(pb, chunk_size); |
|
if (avio_rb32(pb) != MKBETAG('P','F','M','T')) |
|
return AVERROR_INVALIDDATA; |
|
chunk_size = avio_rl32(pb); |
|
pos = avio_tell(pb); |
|
avio_skip(pb, 2); |
|
st = avformat_new_stream(s, NULL); |
|
if (!st) |
|
return AVERROR(ENOMEM); |
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
|
st->codecpar->codec_id = AV_CODEC_ID_APAC; |
|
st->codecpar->ch_layout.nb_channels = avio_rl16(pb); |
|
st->codecpar->sample_rate = avio_rl32(pb); |
|
if (st->codecpar->ch_layout.nb_channels <= 0 || |
|
st->codecpar->ch_layout.nb_channels > 2 || |
|
st->codecpar->sample_rate <= 0) |
|
return AVERROR_INVALIDDATA; |
|
avio_skip(pb, 2); |
|
st->codecpar->bits_per_coded_sample = avio_rl16(pb); |
|
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
|
avio_skip(pb, (chunk_size + pos) - avio_tell(pb) + (chunk_size & 1)); |
|
if (avio_rb32(pb) != MKBETAG('P','A','D',' ')) |
|
return AVERROR_INVALIDDATA; |
|
avio_skip(pb, 4); |
|
|
|
return 0; |
|
} |
|
|
|
const AVInputFormat ff_apac_demuxer = { |
|
.name = "apac", |
|
.long_name = NULL_IF_CONFIG_SMALL("raw APAC"), |
|
.read_probe = apac_probe, |
|
.read_header = apac_read_header, |
|
.read_packet = ff_raw_read_partial_packet, |
|
.extensions = "apc", |
|
.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK | AVFMT_NOTIMESTAMPS, |
|
.raw_codec_id = AV_CODEC_ID_APAC, |
|
.priv_data_size = sizeof(FFRawDemuxerContext), |
|
.priv_class = &ff_raw_demuxer_class, |
|
}; |
|
|