/** Read magic cookie chunk */
static int read_kuki_chunk(AVFormatContext *s, int64_t size)
{
ByteIOContext *pb = s->pb;
AVStream *st = s->streams[0];
if (size < 0 || size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
return -1;
if (st->codec->codec_id == CODEC_ID_AAC) {
/* The magic cookie format for AAC is an mp4 esds atom.
The lavc AAC decoder requires the data from the codec specific
description as extradata input. */
int strt, skip;
MOVAtom atom;
strt = url_ftell(pb);
ff_mov_read_esds(s, pb, atom);
skip = size - (url_ftell(pb) - strt);
if (skip < 0 || !st->codec->extradata ||
st->codec->codec_id != CODEC_ID_AAC) {
av_log(s, AV_LOG_ERROR, "invalid AAC magic cookie\n");
return AVERROR_INVALIDDATA;
}
url_fskip(pb, skip);
} else {
st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata)
return AVERROR(ENOMEM);
get_buffer(pb, st->codec->extradata, size);
st->codec->extradata_size = size;
}
return 0;
}
/** Read magic cookie chunk */
static int read_kuki_chunk(AVFormatContext *s, int64_t size)
{
AVIOContext *pb = s->pb;
AVStream *st = s->streams[0];
if (size < 0 || size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
return -1;
if (st->codec->codec_id == CODEC_ID_AAC) {
/* The magic cookie format for AAC is an mp4 esds atom.
The lavc AAC decoder requires the data from the codec specific
description as extradata input. */
int strt, skip;
MOVAtom atom;
strt = avio_tell(pb);
ff_mov_read_esds(s, pb, atom);
skip = size - (avio_tell(pb) - strt);
if (skip < 0 || !st->codec->extradata ||
st->codec->codec_id != CODEC_ID_AAC) {
av_log(s, AV_LOG_ERROR, "invalid AAC magic cookie\n");
return AVERROR_INVALIDDATA;
}
avio_skip(pb, skip);
} else if (st->codec->codec_id == CODEC_ID_ALAC) {
#define ALAC_PREAMBLE 12
#define ALAC_HEADER 36
#define ALAC_NEW_KUKI 24
if (size == ALAC_NEW_KUKI) {
st->codec->extradata = av_mallocz(ALAC_HEADER + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata)
return AVERROR(ENOMEM);
memcpy(st->codec->extradata, "\0\0\0\24alac", 8);
avio_read(pb, st->codec->extradata + ALAC_HEADER - ALAC_NEW_KUKI, ALAC_NEW_KUKI);
st->codec->extradata_size = ALAC_HEADER;
} else {
if (size < ALAC_PREAMBLE + ALAC_HEADER) {
av_log(s, AV_LOG_ERROR, "invalid ALAC magic cookie\n");
avio_skip(pb, size);
return AVERROR_INVALIDDATA;
}
avio_skip(pb, ALAC_PREAMBLE);
st->codec->extradata = av_mallocz(ALAC_HEADER + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata)
return AVERROR(ENOMEM);
avio_read(pb, st->codec->extradata, ALAC_HEADER);
st->codec->extradata_size = ALAC_HEADER;
avio_skip(pb, size - ALAC_PREAMBLE - ALAC_HEADER);
}
} else {
st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata)
return AVERROR(ENOMEM);
avio_read(pb, st->codec->extradata, size);
st->codec->extradata_size = size;
}
return 0;
}
/** Read magic cookie chunk */
static int read_kuki_chunk(AVFormatContext *s, int64_t size)
{
AVIOContext *pb = s->pb;
AVStream *st = s->streams[0];
if (size < 0 || size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
return -1;
if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
/* The magic cookie format for AAC is an mp4 esds atom.
The lavc AAC decoder requires the data from the codec specific
description as extradata input. */
int strt, skip;
strt = avio_tell(pb);
ff_mov_read_esds(s, pb);
skip = size - (avio_tell(pb) - strt);
if (skip < 0 || !st->codecpar->extradata ||
st->codecpar->codec_id != AV_CODEC_ID_AAC) {
av_log(s, AV_LOG_ERROR, "invalid AAC magic cookie\n");
return AVERROR_INVALIDDATA;
}
avio_skip(pb, skip);
} else if (st->codecpar->codec_id == AV_CODEC_ID_ALAC) {
#define ALAC_PREAMBLE 12
#define ALAC_HEADER 36
#define ALAC_NEW_KUKI 24
uint8_t preamble[12];
if (size < ALAC_NEW_KUKI) {
av_log(s, AV_LOG_ERROR, "invalid ALAC magic cookie\n");
avio_skip(pb, size);
return AVERROR_INVALIDDATA;
}
avio_read(pb, preamble, ALAC_PREAMBLE);
st->codecpar->extradata = av_mallocz(ALAC_HEADER + AV_INPUT_BUFFER_PADDING_SIZE);
if (!st->codecpar->extradata)
return AVERROR(ENOMEM);
/* For the old style cookie, we skip 12 bytes, then read 36 bytes.
* The new style cookie only contains the last 24 bytes of what was
* 36 bytes in the old style cookie, so we fabricate the first 12 bytes
* in that case to maintain compatibility. */
if (!memcmp(&preamble[4], "frmaalac", 8)) {
if (size < ALAC_PREAMBLE + ALAC_HEADER) {
av_log(s, AV_LOG_ERROR, "invalid ALAC magic cookie\n");
av_freep(&st->codecpar->extradata);
return AVERROR_INVALIDDATA;
}
avio_read(pb, st->codecpar->extradata, ALAC_HEADER);
avio_skip(pb, size - ALAC_PREAMBLE - ALAC_HEADER);
} else {
AV_WB32(st->codecpar->extradata, 36);
memcpy(&st->codecpar->extradata[4], "alac", 4);
AV_WB32(&st->codecpar->extradata[8], 0);
memcpy(&st->codecpar->extradata[12], preamble, 12);
avio_read(pb, &st->codecpar->extradata[24], ALAC_NEW_KUKI - 12);
avio_skip(pb, size - ALAC_NEW_KUKI);
}
st->codecpar->extradata_size = ALAC_HEADER;
} else {
st->codecpar->extradata = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!st->codecpar->extradata)
return AVERROR(ENOMEM);
avio_read(pb, st->codecpar->extradata, size);
st->codecpar->extradata_size = size;
}
return 0;
}
