static public int vorbis_analysis(ref vorbis_block vb, ref Ogg.ogg_packet op)
{
int ret, i;
vorbis_block_internal vbi = vb._internal as vorbis_block_internal;
vb.glue_bits = 0;
vb.time_bits = 0;
vb.floor_bits = 0;
vb.res_bits = 0;
/* first things first. Make sure encode is ready */
for (i = 0; i < PACKETBLOBS; i++)
{
Ogg.oggpack_reset(ref vbi.packetblob[i]);
}
/* we only have one mapping type (0), and we let the mapping code itself figure out what soft mode to use.
* This allows easier bitrate management */
if ((ret = _mapping_P[0].forward(ref vb)) != 0)
{
return(ret);
}
if (vorbis_bitrate_managed(ref vb) != 0)
{
/* The app is using a bitmanaged mode... but not using the
* bitrate management interface. */
return(OV_EINVAL);
}
op.packet = Ogg.oggpack_get_buffer(ref vb.opb);
op.bytes = Ogg.oggpack_bytes(ref vb.opb);
op.b_o_s = 0;
op.granulepos = vb.granulepos;
op.packetno = vb.sequence; /* for sake of completeness */
return(0);
}
static int _vorbis_unpack_comment(ref vorbis_comment vc, ref Ogg.oggpack_buffer opb)
{
int i;
int vendorlen = Ogg.oggpack_read(ref opb, 32);
if (vendorlen < 0)
{
goto err_out;
}
if (vendorlen > opb.storage - 8)
{
goto err_out;
}
vc.vendor = new char[vendorlen + 1];
_v_readstring(ref opb, ref vc.vendor, vendorlen);
i = Ogg.oggpack_read(ref opb, 32);
if (i < 0)
{
goto err_out;
}
if (i > ((opb.storage - Ogg.oggpack_bytes(ref opb) >> 2)))
{
goto err_out;
}
vc.comments = i;
vc.user_comments = new char[vc.comments + 1][];
vc.comment_lengths = new int[vc.comments + 1];
for (i = 0; i < vc.comments; i++)
{
int len = Ogg.oggpack_read(ref opb, 32);
if (len < 0)
{
goto err_out;
}
if (len > opb.storage - Ogg.oggpack_bytes(ref opb))
{
goto err_out;
}
vc.comment_lengths[i] = len;
vc.user_comments[i] = new char[len + 1];
_v_readstring(ref opb, ref vc.user_comments[i], len);
}
/* EOP check */
if (Ogg.oggpack_read(ref opb, 1) != 1)
{
goto err_out;
}
return(0);
err_out:
vorbis_comment_clear(ref vc);
return(OV_EBADHEADER);
}
static void ClipTest(uint[] b, int vals, int bits, uint[] comp, int compsize)
{
int bytes;
byte *buffer;
Ogg.oggpack_reset(ref o);
for (int i = 0; i < vals; i++)
{
Ogg.oggpack_write(ref o, b[i], bits > 0 ? bits : iLog(b[i]));
}
buffer = Ogg.oggpack_get_buffer(ref o);
bytes = Ogg.oggpack_bytes(ref o);
if (bytes != compsize)
{
throw new Exception("wrong number of bytes!");
}
for (int i = 0; i < bytes; i++)
{
if (buffer[i] != comp[i])
{
for (int j = 0; j < bytes; j++)
{
Console.WriteLine(buffer[j] + " , " + comp[j]);
}
throw new Exception("wrote incorrect value!");
}
}
Ogg.oggpack_readinit(ref r, buffer, bytes);
for (int i = 0; i < vals; i++)
{
int tbit = bits > 0 ? bits : iLog(b[i]);
if (Ogg.oggpack_look(ref r, tbit) == -1)
{
throw new Exception("out of data!");
}
if (Ogg.oggpack_look(ref r, tbit) != (b[i] & mask[tbit]))
{
throw new Exception("looked at incorrect value!");
}
if (tbit == 1)
{
if (Ogg.oggpack_look1(ref r) != (b[i] & mask[tbit]))
{
throw new Exception("looked at single bit incorrect value!");
}
}
if (tbit == 1)
{
if (Ogg.oggpack_read1(ref r) != (b[i] & mask[tbit]))
{
throw new Exception("read incorrect single bit value!");
}
}
else if (Ogg.oggpack_read(ref r, tbit) != (b[i] & mask[tbit]))
{
throw new Exception("read incorrect value!");
}
}
if (Ogg.oggpack_bytes(ref r) != bytes)
{
throw new Exception("leftover bytes after read!");
}
}
static public void Test()
{
byte *buffer;
int bytes = 0;
/* Test read/write together */
/* Later we test against pregenerated bitstreams */
Ogg.oggpack_writeinit(ref o);
Console.Write("Small preclipped packing (LSb): ");
ClipTest(testBuffer1, testSize1, 0, one, oneSize);
Console.WriteLine("ok.");
Console.Write("Null bit call (LSb): ");
ClipTest(testBuffer3, testSize3, 0, two, twoSize);
Console.WriteLine("ok.");
Console.Write("Large preclipped packing (LSb): ");
ClipTest(testBuffer2, testSize2, 0, three, threeSize);
Console.WriteLine("ok.");
Console.Write("32 bit precliiped packing (LSb): ");
{
Ogg.oggpack_reset(ref o);
for (int i = 0; i < testSize2; i++)
{
Ogg.oggpack_write(ref o, large[i], 32);
}
buffer = Ogg.oggpack_get_buffer(ref o);
bytes = Ogg.oggpack_bytes(ref o);
Ogg.oggpack_readinit(ref r, buffer, bytes);
for (int i = 0; i < testSize2; i++)
{
if (Ogg.oggpack_look(ref r, 32) == -1)
{
throw new Exception("out of data. failed!");
}
if (Ogg.oggpack_look(ref r, 32) != large[i])
{
throw new Exception("read incorrect value! " + Ogg.oggpack_look(ref r, 32) + " != " + large[1]);
}
Ogg.oggpack_adv(ref r, 32);
}
if (Ogg.oggpack_bytes(ref r) != bytes)
{
throw new Exception("leftover bytes after read!");
}
Console.WriteLine("ok.");
}
Console.Write("Small unclipped packing (LSb): ");
ClipTest(testBuffer1, testSize1, 7, four, fourSize);
Console.WriteLine("ok.");
Console.Write("Large unclipped packing (LSb): ");
ClipTest(testBuffer2, testSize2, 17, five, fiveSize);
Console.WriteLine("ok.");
Console.Write("Single bit unclipped packing (LSb): ");
ClipTest(testBuffer3, testSize3, 1, six, sixSize);
Console.WriteLine("ok.");
Console.Write("Testing read past end (LSb): ");
{
byte *temp = (byte *)Ogg._ogg_malloc(8);
try
{
for (int i = 0; i < 8; i++)
{
temp[i] = 0;
}
Ogg.oggpack_readinit(ref r, temp, 8);
for (int i = 0; i < 64; i++)
{
if (Ogg.oggpack_read(ref r, 1) != 0)
{
throw new Exception("failed; got -1 prematurely.");
}
}
if (Ogg.oggpack_look(ref r, 1) != -1 || Ogg.oggpack_read(ref r, 1) != -1)
{
throw new Exception("failed; read past end without -1");
}
for (int i = 0; i < 8; i++)
{
temp[i] = 0;
}
Ogg.oggpack_readinit(ref r, temp, 8);
if (Ogg.oggpack_read(ref r, 30) != 0 || Ogg.oggpack_read(ref r, 16) != 0)
{
throw new Exception("failed 2; got -1 prematurely.");
}
if (Ogg.oggpack_look(ref r, 18) != 0 || Ogg.oggpack_look(ref r, 18) != 0)
{
throw new Exception("failed 3; got -1 prematurely.");
}
if (Ogg.oggpack_look(ref r, 19) != -1 || Ogg.oggpack_look(ref r, 19) != -1)
{
throw new Exception("failed 3; got -1 prematurely.");
}
if (Ogg.oggpack_look(ref r, 32) != -1 || Ogg.oggpack_look(ref r, 32) != -1)
{
throw new Exception("failed 3; got -1 prematurely.");
}
Ogg.oggpack_writeclear(ref o);
Console.WriteLine("ok.");
}
finally
{
Ogg._ogg_free(temp);
}
}
/********** lazy, cut-n-paste retest with MSb packing ***********/
/* Test read/write together */
/* Later we test against pregenerated bitstreams */
Ogg.oggpackB_writeinit(ref o);
Console.Write("Small preclipped packing (MSb): ");
ClipTestB(testBuffer1, testSize1, 0, oneB, oneSize);
Console.WriteLine("ok.");
Console.Write("Null bit call (LSb): ");
ClipTestB(testBuffer3, testSize3, 0, twoB, twoSize);
Console.WriteLine("ok.");
Console.Write("Large preclipped packing (LSb): ");
ClipTestB(testBuffer2, testSize2, 0, threeB, threeSize);
Console.WriteLine("ok.");
Console.Write("32 bit precliiped packing (LSb): ");
{
Ogg.oggpackB_reset(ref o);
for (int i = 0; i < testSize2; i++)
{
Ogg.oggpackB_write(ref o, large[i], 32);
}
buffer = Ogg.oggpackB_get_buffer(ref o);
bytes = Ogg.oggpackB_bytes(ref o);
Ogg.oggpackB_readinit(ref r, buffer, bytes);
for (int i = 0; i < testSize2; i++)
{
if (Ogg.oggpackB_look(ref r, 32) == -1)
{
throw new Exception("out of data. failed!");
}
if (Ogg.oggpackB_look(ref r, 32) != large[i])
{
throw new Exception("read incorrect value! " + Ogg.oggpackB_look(ref r, 32) + " != " + large[1]);
}
Ogg.oggpackB_adv(ref r, 32);
}
if (Ogg.oggpackB_bytes(ref r) != bytes)
{
throw new Exception("leftover bytes after read!");
}
Console.WriteLine("ok.");
}
Console.Write("Small unclipped packing (LSb): ");
ClipTestB(testBuffer1, testSize1, 7, fourB, fourSize);
Console.WriteLine("ok.");
Console.Write("Large unclipped packing (LSb): ");
ClipTestB(testBuffer2, testSize2, 17, fiveB, fiveSize);
Console.WriteLine("ok.");
Console.Write("Single bit unclipped packing (LSb): ");
ClipTestB(testBuffer3, testSize3, 1, sixB, sixSize);
Console.WriteLine("ok.");
Console.Write("Testing read past end (LSb): ");
{
byte *temp = (byte *)Ogg._ogg_malloc(8);
try
{
for (int i = 0; i < 8; i++)
{
temp[i] = 0;
}
Ogg.oggpackB_readinit(ref r, temp, 8);
for (int i = 0; i < 64; i++)
{
if (Ogg.oggpackB_read(ref r, 1) != 0)
{
throw new Exception("failed; got -1 prematurely.");
}
}
if (Ogg.oggpackB_look(ref r, 1) != -1 || Ogg.oggpackB_read(ref r, 1) != -1)
{
throw new Exception("failed; read past end without -1");
}
for (int i = 0; i < 8; i++)
{
temp[i] = 0;
}
Ogg.oggpackB_readinit(ref r, temp, 8);
if (Ogg.oggpackB_read(ref r, 30) != 0 || Ogg.oggpackB_read(ref r, 16) != 0)
{
throw new Exception("failed 2; got -1 prematurely.");
}
if (Ogg.oggpackB_look(ref r, 18) != 0 || Ogg.oggpackB_look(ref r, 18) != 0)
{
throw new Exception("failed 3; got -1 prematurely.");
}
if (Ogg.oggpackB_look(ref r, 19) != -1 || Ogg.oggpackB_look(ref r, 19) != -1)
{
throw new Exception("failed 3; got -1 prematurely.");
}
if (Ogg.oggpackB_look(ref r, 32) != -1 || Ogg.oggpackB_look(ref r, 32) != -1)
{
throw new Exception("failed 3; got -1 prematurely.");
}
Ogg.oggpackB_writeclear(ref o);
Console.WriteLine("ok.");
}
finally
{
Ogg._ogg_free(temp);
}
}
}
