int aifFile::ReadChunk() {
if (fd == NULL)
return -1;
// Read the common header for all aif chunks
aifHeader header;
if (fcbs->read(&header, 1, sizeof(aifHeader), fd) != sizeof(aifHeader)) {
fcbs->close(fd);
fd = NULL;
return -1;
}
switch (header.id) {
case FORM_ID:
int aifId;
if (fcbs->read(&aifId, 1, sizeof(int), fd) != sizeof(int))
return -1;
// Check aifId signature for valid file
if (aifId != AIFF_ID)
return -1;
break;
case COMM_ID:
commHeader comm;
if (fcbs->read(&comm, 1, sizeof(commHeader), fd) != sizeof(commHeader))
return -1;
channels = SWAP16(comm.channels);
samplesPerSec = (int)ConvertFromIeeeExtended(comm.sampleRate80);
bitsPerSample = SWAP16(comm.sampleSize);
status = 1;
break;
case SSND_ID:
ssndHeader ssnd;
if (fcbs->read(&ssnd, 1, sizeof(ssndHeader), fd) != sizeof(ssndHeader))
return -1;
if (ssnd.offset) {
fcbs->seek(fd, SWAP32(ssnd.offset), SEEK_CUR);
}
chunkSize = SWAP32(header.size) - 8;
totalSamples = chunkSize / (bitsPerSample/8);
status = 2;
break;
default:
fcbs->seek(fd, SWAP32(header.size), SEEK_CUR);
break;
}
return 0;
}
double wxArchive::LoadDouble()
{
double value = 0;
// reads a character from the stream
if(CanLoad())
{
#if wxUSE_APPLE_IEEE
unsigned char buf[10];
m_idstr.Read((void *)buf, 10);
value = ConvertFromIeeeExtended(buf);
#else
#pragma warning "wxArchive::LoadDouble() not using IeeeExtended - will not work!"
#endif
}
return value;
}
wxDataInputStream::wxDataInputStream(wxInputStream& s, const wxMBConv& conv)
: m_input(&s), m_be_order(false), m_conv(conv.Clone())
#else
wxDataInputStream::wxDataInputStream(wxInputStream& s)
: m_input(&s), m_be_order(false)
#endif
{
}
wxDataInputStream::~wxDataInputStream()
{
#if wxUSE_UNICODE
delete m_conv;
#endif // wxUSE_UNICODE
}
#if wxHAS_INT64
wxUint64 wxDataInputStream::Read64()
{
wxUint64 tmp;
Read64(&tmp, 1);
return tmp;
}
#endif // wxHAS_INT64
wxUint32 wxDataInputStream::Read32()
{
wxUint32 i32;
m_input->Read(&i32, 4);
if (m_be_order)
return wxUINT32_SWAP_ON_LE(i32);
else
return wxUINT32_SWAP_ON_BE(i32);
}
wxUint16 wxDataInputStream::Read16()
{
wxUint16 i16;
m_input->Read(&i16, 2);
if (m_be_order)
return wxUINT16_SWAP_ON_LE(i16);
else
return wxUINT16_SWAP_ON_BE(i16);
}
wxUint8 wxDataInputStream::Read8()
{
wxUint8 buf;
m_input->Read(&buf, 1);
return (wxUint8)buf;
}
double wxDataInputStream::ReadDouble()
{
#if wxUSE_APPLE_IEEE
char buf[10];
m_input->Read(buf, 10);
return ConvertFromIeeeExtended((const wxInt8 *)buf);
#else
return 0.0;
#endif
}
static int _read_iff(dmoz_file_t *file, song_sample_t *smp, const uint8_t *data, size_t length)
{
chunk_t chunk;
size_t pos = 0;
chunk_t vhdr, body, name, comm, auth, anno, ssnd; // butt
if (!iff_chunk_read(&chunk, data, length, &pos))
return 0;
if (chunk.id != ID_FORM)
return 0;
// jump "into" the FORM chunk
// if (pos < length), there's more data after the FORM chunk -- but I don't care about this scenario
pos = 0;
length = MIN(length, chunk.size);
data = chunk.data->FORM.data;
/* the header is already byteswapped, but anything in 'chunk' will need to be swapped as needed
because the structure is a const pointing into the data itself */
switch (bswapBE32(chunk.data->FORM.filetype)) {
case ID_8SVX:
// shut up, gcc
ZEROIZE(vhdr);
ZEROIZE(body);
ZEROIZE(name);
ZEROIZE(auth);
ZEROIZE(anno);
while (iff_chunk_read(&chunk, data, length, &pos)) {
switch (chunk.id) {
case ID_VHDR: vhdr = chunk; break;
case ID_BODY: body = chunk; break;
case ID_NAME: name = chunk; break;
case ID_AUTH: auth = chunk; break;
case ID_ANNO: anno = chunk; break;
default: break;
}
}
if (!(vhdr.id && body.id))
return 0;
if (vhdr.data->VHDR.compression) {
log_appendf(4, "error: compressed 8SVX files are unsupported");
return 0;
}
if (vhdr.data->VHDR.num_octaves != 1) {
log_appendf(4, "warning: 8SVX file contains %d octaves",
vhdr.data->VHDR.num_octaves);
}
if (file) {
file->description = "8SVX sample";
file->type = TYPE_SAMPLE_PLAIN;
}
if (!name.id) name = auth;
if (!name.id) name = anno;
if (name.id) {
if (file) {
file->title = calloc(1, name.size + 1);
memcpy(file->title, name.data->bytes, name.size);
file->title[name.size] = '\0';
}
if (smp) {
int len = MIN(25, name.size);
memcpy(smp->name, name.data->bytes, len);
smp->name[len] = 0;
}
}
if (smp) {
smp->c5speed = bswapBE16(vhdr.data->VHDR.smp_per_sec);
smp->length = body.size;
csf_read_sample(smp, SF_BE | SF_PCMS | SF_8 | SF_M, body.data->bytes, body.size);
smp->volume = 64*4;
smp->global_volume = 64;
// this is done kinda weird
smp->loop_end = bswapBE32(vhdr.data->VHDR.smp_highoct_repeat);
if (smp->loop_end) {
smp->loop_start = bswapBE32(vhdr.data->VHDR.smp_highoct_1shot);
smp->loop_end += smp->loop_start;
if (smp->loop_start > smp->length)
smp->loop_start = 0;
if (smp->loop_end > smp->length)
smp->loop_end = smp->length;
if (smp->loop_start + 2 < smp->loop_end)
smp->flags |= CHN_LOOP;
}
// TODO vhdr.data->VHDR.volume ?
}
return 1;
case ID_AIFF:
ZEROIZE(comm);
ZEROIZE(ssnd);
ZEROIZE(name);
ZEROIZE(auth);
ZEROIZE(anno);
while (iff_chunk_read(&chunk, data, length, &pos)) {
switch (chunk.id) {
case ID_COMM: comm = chunk; break;
case ID_SSND: ssnd = chunk; break;
case ID_NAME: name = chunk; break;
default: break;
}
}
if (!(comm.id && ssnd.id))
return 0;
if (file) {
file->description = "Audio IFF sample";
file->type = TYPE_SAMPLE_PLAIN;
}
if (!name.id) name = auth;
if (!name.id) name = anno;
if (name.id) {
if (file) {
file->title = calloc(1, name.size + 1);
memcpy(file->title, name.data->bytes, name.size);
file->title[name.size] = '\0';
}
if (smp) {
int len = MIN(25, name.size);
memcpy(smp->name, name.data->bytes, len);
smp->name[len] = 0;
}
}
/* TODO loop points */
if (smp) {
uint32_t flags = SF_BE | SF_PCMS;
switch (bswapBE16(comm.data->COMM.num_channels)) {
default:
log_appendf(4, "warning: multichannel AIFF is unsupported");
case 1:
flags |= SF_M;
break;
case 2:
flags |= SF_SI;
break;
}
switch ((bswapBE16(comm.data->COMM.sample_size) + 7) & ~7) {
default:
log_appendf(4, "warning: AIFF has unsupported bit-width");
case 8:
flags |= SF_8;
break;
case 16:
flags |= SF_16;
break;
}
// TODO: data checking; make sure sample count and byte size agree
// (and if not, cut to shorter of the two)
smp->c5speed = ConvertFromIeeeExtended(comm.data->COMM.sample_rate);
smp->length = bswapBE32(comm.data->COMM.num_frames);
smp->volume = 64*4;
smp->global_volume = 64;
// the audio data starts 8 bytes into the chunk
// (don't care about the block alignment stuff)
csf_read_sample(smp, flags, ssnd.data->bytes + 8, ssnd.size - 8);
}
return 1;
}
return 0;
}
