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#include "stdafx.h"
#include "OggSound.h"
#include "Exception.h"
#include "Utils/Memory.h"
#include <limits>
namespace sound {
static const GcType vorbisType = {
GcType::tFixed,
null,
null,
sizeof(OggVorbis_File),
1,
{ OFFSET_OF(OggVorbis_File, datasource) }
};
static OggVorbis_File *allocFile(Engine &e) {
return (OggVorbis_File *)runtime::allocStaticRaw(e, &vorbisType);
}
OggSound::OggSound(IStream *src, Bool seekable) : src(src), file(null), seekable(seekable), atEnd(false) {
file = allocFile(src->engine());
ov_callbacks cb = {
&OggSound::srcRead,
&OggSound::srcSeek,
&OggSound::srcClose,
&OggSound::srcTell,
};
switch (ov_open_callbacks(this, file, null, 0, cb)) {
case 0:
// All is well!
break;
case OV_ENOTVORBIS:
throw new (this) SoundOpenError(S("Looks like an OGG file, but it is something else."));
case OV_EVERSION:
throw new (this) SoundOpenError(S("Ogg version mismatch."));
case OV_EBADHEADER:
throw new (this) SoundOpenError(S("Ogg header corrupt."));
default:
throw new (this) SoundOpenError(S("Unknown error when opening OGG file."));
}
/**
* Note: there seems to be possible to have multiple streams inside a vorbis file, we do not
* handle that correctly at the moment. Now, we only show the first stream.
*/
vi = ov_info(file, 0);
}
OggSound::~OggSound() {
// If we got this far, we should not attempt to call virtual functions on 'src', as it might crash.
src = null;
close();
}
void OggSound::close() {
if (file) {
ov_clear(file);
file = null;
}
if (src) {
src->close();
src = null;
}
}
Bool OggSound::seek(Word to) {
if (!seekable)
return false;
ov_pcm_seek(file, to);
return true;
}
Word OggSound::tell() {
if (!seekable)
return 0;
return ov_pcm_tell(file);
}
Word OggSound::length() {
if (!seekable)
return 0;
return ov_pcm_total(file, 0);
}
Nat OggSound::sampleFreq() const {
return vi->rate;
}
Nat OggSound::channels() const {
return vi->channels;
}
Buffer OggSound::read(Buffer to) {
Nat free = to.count() - to.filled();
Nat ch = channels();
Nat samples = free / ch;
float **buffer = null;
int bitstream = 0;
long r = ov_read_float(file, &buffer, samples, &bitstream);
if (r <= 0) {
atEnd = true;
samples = 0;
} else {
samples = r;
}
// Copy...
nat at = to.filled();
for (Nat i = 0; i < samples; i++)
for (Nat c = 0; c < ch; c++)
to[at++] = buffer[c][i];
to.filled(at);
return to;
}
Bool OggSound::more() {
return !atEnd;
}
size_t OggSound::srcRead(void *to, size_t size, size_t nmemb, void *data) {
OggSound *me = (OggSound *)data;
size_t s = size * nmemb;
s = min(s, size_t(std::numeric_limits<Nat>::max()));
storm::Buffer r = me->src->read(Nat(s));
memcpy(to, r.dataPtr(), r.filled());
return r.filled();
}
int OggSound::srcSeek(void *data, ogg_int64_t offset, int whence) {
OggSound *me = (OggSound *)data;
if (!me->seekable)
return -1;
RIStream *s = (RIStream *)me->src;
switch (whence) {
case SEEK_SET:
s->seek(offset);
break;
case SEEK_CUR:
s->seek(s->tell() + offset);
break;
case SEEK_END:
s->seek(s->length() + offset);
break;
}
return 0;
}
int OggSound::srcClose(void *data) {
OggSound *me = (OggSound *)data;
if (me->src)
me->src->close();
me->src = null;
return 0;
}
long OggSound::srcTell(void *data) {
OggSound *me = (OggSound *)data;
if (!me->seekable)
return -1;
RIStream *s = (RIStream *)me->src;
return (long)s->tell();
}
OggSound *openOgg(RIStream *src) {
return new (src) OggSound(src, true);
}
OggSound *openOggStream(IStream *src) {
return new (src) OggSound(src, false);
}
}
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