/**
* Last step of the OggVorbis_File initialization; get all the vorbis_info structs and PCM
* positions. Only called by the seekable initialization (local stream storage is hacked slightly;
* pay attention to how that's done)
*
* @param firstInfo first info
* @param firstComment first comment
* @param dataoffset data offset
* @throws JOrbisException if an error occurs
*/
void prefetchAllHeaders(Info firstInfo, Comment firstComment, int dataoffset)
throws JOrbisException {
Page og = new Page();
int ret;
vi = new Info[links];
vc = new Comment[links];
dataoffsets = new long[links];
pcmlengths = new long[links];
serialnos = new int[links];
for (int i = 0; i < links; i++) {
if (firstInfo != null && firstComment != null && i == 0) {
// we already grabbed the initial header earlier. This just
// saves the waste of grabbing it again
vi[i] = firstInfo;
vc[i] = firstComment;
dataoffsets[i] = dataoffset;
} else {
// seek to the location of the initial header
seekHelper(offsets[i]); // !!!
vi[i] = new Info();
vc[i] = new Comment();
if (fetchHeaders(vi[i], vc[i], null, null) == -1) {
dataoffsets[i] = -1;
} else {
dataoffsets[i] = offset;
os.clear();
}
}
// get the serial number and PCM length of this link. To do this,
// get the last page of the stream
long end = offsets[i + 1]; // !!!
seekHelper(end);
while (true) {
ret = getPrevPage(og);
if (ret == -1) {
// this should not be possible
vi[i].clear();
vc[i].clear();
break;
}
if (og.granulepos() != -1) {
serialnos[i] = og.serialno();
pcmlengths[i] = og.granulepos();
break;
}
}
}
}
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;
}
}
}
}
/** @return negative value on error */
private int seekDuration() {
this.startOffset = getNextPageOffset();
seek(getData().size());
Page og = new Page();
int endOffset = getPrevPage(og, serialno);
if (endOffset < 0) {
return -1;
} else {
numFrames = (int) og.granulepos();
seek(startOffset);
return 0;
}
}
@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;
}
/*
* Taken from the JOrbis Player
*/
private void playStream(Thread me) throws InternalException {
boolean chained = false;
initJOrbis();
while (true) {
if (checkState()) {
return;
}
int eos = 0;
int index = oy.buffer(BUFSIZE);
buffer = oy.data;
try {
bytes = bitStream.read(buffer, index, BUFSIZE);
} catch (Exception e) {
throw new InternalException(e);
}
oy.wrote(bytes);
if (chained) {
chained = false;
} else {
if (oy.pageout(og) != 1) {
if (bytes < BUFSIZE) break;
throw new InternalException("Input does not appear to be an Ogg bitstream.");
}
}
os.init(og.serialno());
os.reset();
vi.init();
vc.init();
if (os.pagein(og) < 0) {
// error; stream version mismatch perhaps
throw new InternalException("Error reading first page of Ogg bitstream data.");
}
if (os.packetout(op) != 1) {
// no page? must not be vorbis
throw new InternalException("Error reading initial header packet.");
}
if (vi.synthesis_headerin(vc, op) < 0) {
// error case; not a vorbis header
throw new InternalException("This Ogg bitstream does not contain Vorbis audio data.");
}
int i = 0;
while (i < 2) {
while (i < 2) {
if (checkState()) {
return;
}
int result = oy.pageout(og);
if (result == 0) break; // Need more data
if (result == 1) {
os.pagein(og);
while (i < 2) {
result = os.packetout(op);
if (result == 0) break;
if (result == -1) {
throw new InternalException("Corrupt secondary header. Exiting.");
}
vi.synthesis_headerin(vc, op);
i++;
}
}
}
index = oy.buffer(BUFSIZE);
buffer = oy.data;
try {
bytes = bitStream.read(buffer, index, BUFSIZE);
} catch (Exception e) {
throw new InternalException(e);
}
if (bytes == 0 && i < 2) {
throw new InternalException("End of file before finding all Vorbis headers!");
}
oy.wrote(bytes);
}
convsize = BUFSIZE / vi.channels;
vd.synthesis_init(vi);
vb.init(vd);
float[][][] _pcmf = new float[1][][];
int[] _index = new int[vi.channels];
getOutputLine(vi.channels, vi.rate);
while (eos == 0) {
while (eos == 0) {
if (player != me) {
return;
}
int result = oy.pageout(og);
if (result == 0) break; // need more data
if (result == -1) { // missing or corrupt data at this page
// position
// System.err.println("Corrupt or missing data in
// bitstream;
// continuing...");
} else {
os.pagein(og);
if (og.granulepos() == 0) { //
chained = true; //
eos = 1; //
break; //
} //
while (true) {
if (checkState()) {
return;
}
result = os.packetout(op);
if (result == 0) break; // need more data
if (result == -1) { // missing or corrupt data at
// this page position
// no reason to complain; already complained
// above
// System.err.println("no reason to complain;
// already complained above");
} else {
// we have a packet. Decode it
int samples;
if (vb.synthesis(op) == 0) { // test for
// success!
vd.synthesis_blockin(vb);
}
while ((samples = vd.synthesis_pcmout(_pcmf, _index)) > 0) {
if (checkState()) {
return;
}
float[][] pcmf = _pcmf[0];
int bout = (samples < convsize ? samples : convsize);
// convert doubles to 16 bit signed ints
// (host order) and
// interleave
for (i = 0; i < vi.channels; i++) {
int ptr = i * 2;
// int ptr=i;
int mono = _index[i];
for (int j = 0; j < bout; j++) {
int val = (int) (pcmf[i][mono + j] * 32767.);
if (val > 32767) {
val = 32767;
}
if (val < -32768) {
val = -32768;
}
if (val < 0) val = val | 0x8000;
convbuffer[ptr] = (byte) (val);
convbuffer[ptr + 1] = (byte) (val >>> 8);
ptr += 2 * (vi.channels);
}
}
outputLine.write(convbuffer, 0, 2 * vi.channels * bout);
vd.synthesis_read(bout);
}
}
}
if (og.eos() != 0) eos = 1;
}
}
if (eos == 0) {
index = oy.buffer(BUFSIZE);
buffer = oy.data;
try {
bytes = bitStream.read(buffer, index, BUFSIZE);
} catch (Exception e) {
throw new InternalException(e);
}
if (bytes == -1) {
break;
}
oy.wrote(bytes);
if (bytes == 0) eos = 1;
}
}
os.clear();
vb.clear();
vd.clear();
vi.clear();
}
oy.clear();
}
/**
* Seek to a sample offset relative to the decompressed pcm stream.
*
* @param pos position
* @return zero on success, nonzero on failure
*/
public int pcmSeek(long pos) {
int link = -1;
long total = pcmTotal(-1);
if (!seekable) {
return (-1); // don't dump machine if we can't seek
}
if (pos < 0 || pos > total) {
// goto seek_error;
pcmOffset = -1;
decodeClear();
return -1;
}
// which bitstream section does this pcm offset occur in?
for (link = links - 1; link >= 0; link--) {
total -= pcmlengths[link];
if (pos >= total) {
break;
}
}
// search within the logical bitstream for the page with the highest
// pcm_pos preceeding (or equal to) pos. There is a danger here;
// missing pages or incorrect frame number information in the
// bitstream could make our task impossible. Account for that (it
// would be an error condition)
long target = pos - total;
long end = offsets[link + 1];
long begin = offsets[link];
int best = (int) begin;
Page og = new Page();
while (begin < end) {
long bisect;
int ret;
if (end - begin < CHUNKSIZE) {
bisect = begin;
} else {
bisect = (end + begin) / 2;
}
seekHelper(bisect);
ret = getNextPage(og, end - bisect);
if (ret == -1) {
end = bisect;
} else {
long granulepos = og.granulepos();
if (granulepos < target) {
best = ret; // raw offset of packet with granulepos
begin = offset; // raw offset of next packet
} else {
end = bisect;
}
}
}
// found our page. seek to it (call raw_seek).
if (rawSeek(best) != 0) {
// goto seek_error;
pcmOffset = -1;
decodeClear();
return -1;
}
// verify result
if (pcmOffset >= pos) {
// goto seek_error;
pcmOffset = -1;
decodeClear();
return -1;
}
if (pos > pcmTotal(-1)) {
// goto seek_error;
pcmOffset = -1;
decodeClear();
return -1;
}
// discard samples until we reach the desired position. Crossing a
// logical bitstream boundary with abandon is OK.
while (pcmOffset < pos) {
int target2 = (int) (pos - pcmOffset);
float[][][] lPcm = new float[1][][];
int[] lIndex = new int[getInfo(-1).channels];
int samples = vd.synthesisPcmout(lPcm, lIndex);
if (samples > target2) {
samples = target2;
}
vd.synthesisRead(samples);
pcmOffset += samples;
if (samples < target2) {
if (processPacket(1) == 0) {
pcmOffset = pcmTotal(-1); // eof
}
}
}
return 0;
// seek_error:
// dump machine so we're in a known state
// pcm_offset=-1;
// decode_clear();
// return -1;
}