/**
* Try to find Xing/Info/VBRI tags and compute duration from info therein
*/
static int mp3_parse_vbr_tags(AVFormatContext *s, AVStream *st, int64_t base)
{
uint32_t v, spf;
MPADecodeHeader c;
int vbrtag_size = 0;
MP3DecContext *mp3 = s->priv_data;
int ret;
ffio_init_checksum(s->pb, ff_crcA001_update, 0);
v = avio_rb32(s->pb);
ret = avpriv_mpegaudio_decode_header(&c, v);
if (ret < 0)
return ret;
else if (ret == 0)
vbrtag_size = c.frame_size;
if(c.layer != 3)
return -1;
spf = c.lsf ? 576 : 1152; /* Samples per frame, layer 3 */
mp3->frames = 0;
mp3->size = 0;
mp3_parse_info_tag(s, st, &c, spf);
mp3_parse_vbri_tag(s, st, base);
if (!mp3->frames && !mp3->size)
return -1;
/* Skip the vbr tag frame */
avio_seek(s->pb, base + vbrtag_size, SEEK_SET);
if (mp3->frames)
st->duration = av_rescale_q(mp3->frames, (AVRational){spf, c.sample_rate},
st->time_base);
if (mp3->size && mp3->frames && !mp3->is_cbr)
st->codec->bit_rate = av_rescale(mp3->size, 8 * c.sample_rate, mp3->frames * (int64_t)spf);
return 0;
}
static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
{
OGGStreamContext *oggstream = (OGGStreamContext *)s->streams[page->stream_index]->priv_data;
AVIOContext *pb;
int64_t crc_offset;
int ret, size;
uint8_t *buf;
ret = avio_open_dyn_buf(&pb);
if (ret < 0)
return ret;
ffio_init_checksum(pb, ff_crc04C11DB7_update, 0);
ffio_wfourcc(pb, (const uint8_t *)"OggS");
avio_w8(pb, 0);
avio_w8(pb, page->flags | extra_flags);
avio_wl64(pb, page->granule);
avio_wl32(pb, oggstream->serial_num);
avio_wl32(pb, oggstream->page_counter++);
crc_offset = avio_tell(pb);
avio_wl32(pb, 0); // crc
avio_w8(pb, page->segments_count);
avio_write(pb, page->segments, page->segments_count);
avio_write(pb, page->data, page->size);
ogg_update_checksum(s, pb, crc_offset);
avio_flush(pb);
size = avio_close_dyn_buf(pb, &buf);
if (size < 0)
return size;
avio_write(s->pb, buf, size);
avio_flush(s->pb);
av_free(buf);
oggstream->page_count--;
return 0;
}
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->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->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:
case TAK_METADATA_LAST_FRAME:
case TAK_METADATA_ENCODER:
if (size <= 3)
return AVERROR_INVALIDDATA;
buffer = av_malloc(size - 3 + FF_INPUT_BUFFER_PADDING_SIZE);
if (!buffer)
return AVERROR(ENOMEM);
memset(buffer + size - 3, 0, FF_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;
}
}
init_get_bits8(&gb, buffer, size - 3);
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) {
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;
avpriv_tak_parse_streaminfo(&gb, &ti);
if (ti.samples > 0)
st->duration = ti.samples;
st->codec->bits_per_coded_sample = ti.bps;
if (ti.ch_layout)
st->codec->channel_layout = ti.ch_layout;
st->codec->sample_rate = ti.sample_rate;
st->codec->channels = ti.channels;
st->start_time = 0;
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
st->codec->extradata = buffer;
st->codec->extradata_size = size - 3;
buffer = NULL;
} else if (type == TAK_METADATA_LAST_FRAME) {
if (size != 11)
return AVERROR_INVALIDDATA;
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) {
av_log(s, AV_LOG_VERBOSE, "encoder version: %0X\n",
get_bits_long(&gb, TAK_ENCODER_VERSION_BITS));
av_freep(&buffer);
}
}
return AVERROR_EOF;
}
static int tta_read_header(AVFormatContext *s)
{
TTAContext *c = s->priv_data;
AVStream *st;
int i, channels, bps, samplerate;
uint64_t framepos, start_offset;
uint32_t nb_samples, crc;
ff_id3v1_read(s);
if (s->pb->seekable) {
int64_t pos = avio_tell(s->pb);
ff_ape_parse_tag(s);
avio_seek(s->pb, pos, SEEK_SET);
}
start_offset = avio_tell(s->pb);
ffio_init_checksum(s->pb, tta_check_crc, UINT32_MAX);
if (avio_rl32(s->pb) != AV_RL32("TTA1"))
return AVERROR_INVALIDDATA;
avio_skip(s->pb, 2); // FIXME: flags
channels = avio_rl16(s->pb);
bps = avio_rl16(s->pb);
samplerate = avio_rl32(s->pb);
if(samplerate <= 0 || samplerate > 1000000){
av_log(s, AV_LOG_ERROR, "nonsense samplerate\n");
return AVERROR_INVALIDDATA;
}
nb_samples = avio_rl32(s->pb);
if (!nb_samples) {
av_log(s, AV_LOG_ERROR, "invalid number of samples\n");
return AVERROR_INVALIDDATA;
}
crc = ffio_get_checksum(s->pb) ^ UINT32_MAX;
if (crc != avio_rl32(s->pb)) {
av_log(s, AV_LOG_ERROR, "Header CRC error\n");
return AVERROR_INVALIDDATA;
}
c->frame_size = samplerate * 256 / 245;
c->last_frame_size = nb_samples % c->frame_size;
if (!c->last_frame_size)
c->last_frame_size = c->frame_size;
c->totalframes = nb_samples / c->frame_size + (c->last_frame_size < c->frame_size);
c->currentframe = 0;
if(c->totalframes >= UINT_MAX/sizeof(uint32_t) || c->totalframes <= 0){
av_log(s, AV_LOG_ERROR, "totalframes %d invalid\n", c->totalframes);
return AVERROR_INVALIDDATA;
}
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avpriv_set_pts_info(st, 64, 1, samplerate);
st->start_time = 0;
st->duration = nb_samples;
framepos = avio_tell(s->pb) + 4*c->totalframes + 4;
st->codec->extradata_size = avio_tell(s->pb) - start_offset;
st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata) {
st->codec->extradata_size = 0;
return AVERROR(ENOMEM);
}
avio_seek(s->pb, start_offset, SEEK_SET);
avio_read(s->pb, st->codec->extradata, st->codec->extradata_size);
ffio_init_checksum(s->pb, tta_check_crc, UINT32_MAX);
for (i = 0; i < c->totalframes; i++) {
uint32_t size = avio_rl32(s->pb);
av_add_index_entry(st, framepos, i * c->frame_size, size, 0,
AVINDEX_KEYFRAME);
framepos += size;
}
crc = ffio_get_checksum(s->pb) ^ UINT32_MAX;
if (crc != avio_rl32(s->pb)) {
av_log(s, AV_LOG_ERROR, "Seek table CRC error\n");
return AVERROR_INVALIDDATA;
}
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = AV_CODEC_ID_TTA;
st->codec->channels = channels;
st->codec->sample_rate = samplerate;
st->codec->bits_per_coded_sample = bps;
return 0;
}
