private void prefetchAllHeaders(
final Info firstInfo, final Comment firstComment, final int dataoffset) {
final Page page = new Page();
this.m_info = new Info[this.m_links];
this.m_comments = new Comment[this.m_links];
this.m_dataOffsets = new long[this.m_links];
this.m_pcmLengths = new long[this.m_links];
this.m_serialnos = new int[this.m_links];
for (int i = 0; i < this.m_links; ++i) {
if (firstInfo != null && firstComment != null && i == 0) {
this.m_info[i] = firstInfo;
this.m_comments[i] = firstComment;
this.m_dataOffsets[i] = dataoffset;
} else {
this.seekHelper(this.m_offsets[i]);
this.m_info[i] = new Info();
this.m_comments[i] = new Comment();
if (this.fetchHeaders(this.m_info[i], this.m_comments[i], null, null) == -1) {
this.m_dataOffsets[i] = -1L;
} else {
this.m_dataOffsets[i] = this.m_offset;
this.m_oggStreamState.clear();
}
}
final long end = this.m_offsets[i + 1];
this.seekHelper(end);
while (true) {
final int ret = this.getPreviousPage(page);
if (ret == -1) {
this.m_info[i].clear();
break;
}
if (page.granulepos() != -1L) {
this.m_serialnos[i] = page.serialno();
this.m_pcmLengths[i] = page.granulepos();
break;
}
}
}
}
@Override
public int pcmSeek(final long pos) {
if (!this.m_vorbisStream.isSeekable()) {
return -1;
}
long total = this.pcmTotal(-1);
if (pos < 0L || pos > total) {
this.m_pcmOffset = -1L;
this.decodeClear();
return -1;
}
int link;
for (link = this.m_links - 1; link >= 0; --link) {
total -= this.m_pcmLengths[link];
if (pos >= total) {
break;
}
}
final long target = pos - total;
long end = this.m_offsets[link + 1];
long begin = this.m_offsets[link];
int best = (int) begin;
final Page page = new Page();
while (begin < end) {
long bisect;
if (end - begin < this.m_chunkSize) {
bisect = begin;
} else {
bisect = (end + begin) / 2L;
}
this.seekHelper(bisect);
final int ret = this.getNextPage(page, end - bisect);
if (ret == -1) {
end = bisect;
} else {
final long granulepos = page.granulepos();
if (granulepos < target) {
best = ret;
begin = this.m_offset;
} else {
end = bisect;
}
}
}
if (this.rawSeek(best) != 0) {
this.m_pcmOffset = -1L;
this.decodeClear();
return -1;
}
if (this.m_pcmOffset >= pos) {
this.m_pcmOffset = -1L;
this.decodeClear();
return -1;
}
if (pos > this.pcmTotal(-1)) {
this.m_pcmOffset = -1L;
this.decodeClear();
return -1;
}
while (this.m_pcmOffset < pos) {
final int target2 = (int) (pos - this.m_pcmOffset);
final int[] _index = new int[this.m_info[this.m_currentLink].channelsCount];
int samples = this.m_dspState.synthesis_pcmout(this.m_pcmf_buffer, _index);
if (samples > target2) {
samples = target2;
}
this.m_dspState.synthesis_read(samples);
this.m_pcmOffset += samples;
if (samples < target2 && this.processPacket(true) == 0) {
this.m_pcmOffset = this.pcmTotal(-1);
}
}
return 0;
}