FLACSource::FLACSource(const FLACModule &module,
const std::shared_ptr<FILE> &fp):
m_eof(false),
m_giveup(false),
m_initialize_done(false),
m_length(0),
m_position(0),
m_fp(fp),
m_module(module)
{
char buffer[33];
util::check_eof(util::nread(fileno(m_fp.get()), buffer, 33) == 33);
if (std::memcmp(buffer, "ID3", 3) == 0) {
uint32_t size = 0;
for (int i = 6; i < 10; ++i) {
size <<= 7;
size |= buffer[i];
}
CHECKCRT(_lseeki64(fileno(m_fp.get()), 10 + size, SEEK_SET) < 0);
util::check_eof(util::nread(fileno(m_fp.get()), buffer, 33) == 33);
}
uint32_t fcc = util::fourcc(buffer);
if ((fcc != 'fLaC' && fcc != 'OggS')
|| (fcc == 'OggS' && std::memcmp(&buffer[28], "\177FLAC", 5)))
throw std::runtime_error("Not a FLAC file");
CHECKCRT(_lseeki64(fileno(m_fp.get()), 0, SEEK_SET) < 0);
m_decoder =
decoder_t(m_module.stream_decoder_new(),
std::bind1st(std::mem_fun(&FLACSource::close), this));
TRYFL(m_module.stream_decoder_set_metadata_respond(
m_decoder.get(), FLAC__METADATA_TYPE_VORBIS_COMMENT));
TRYFL(m_module.stream_decoder_set_metadata_respond(
m_decoder.get(), FLAC__METADATA_TYPE_PICTURE));
TRYFL((fcc == 'OggS' ? m_module.stream_decoder_init_ogg_stream
: m_module.stream_decoder_init_stream)
(m_decoder.get(),
staticReadCallback,
staticSeekCallback,
staticTellCallback,
staticLengthCallback,
staticEofCallback,
staticWriteCallback,
staticMetadataCallback,
staticErrorCallback,
this) == FLAC__STREAM_DECODER_INIT_STATUS_OK);
TRYFL(m_module.stream_decoder_process_until_end_of_metadata(
m_decoder.get()));
if (m_giveup || m_asbd.mBitsPerChannel == 0)
flac::want(false);
m_buffer.set_unit(m_asbd.mChannelsPerFrame);
m_initialize_done = true;
}
PipedReader::PipedReader(std::shared_ptr<ISource> &src):
FilterBase(src), m_thread(0), m_position(0)
{
HANDLE hr, hw;
int fd;
FILE *fp;
uint32_t bpf = src->getSampleFormat().mBytesPerFrame;
if (!CreatePipe(&hr, &hw, 0, NSAMPLES * bpf * PIPE_BUF_FACTOR))
win32::throw_error("CreatePipe", GetLastError());
CHECKCRT((fd = _open_osfhandle(reinterpret_cast<intptr_t>(hr),
_O_RDONLY|_O_BINARY)) < 0);
CHECKCRT((fp = _fdopen(fd, "rb")) == 0);
m_readPipe.reset(fp, std::fclose);
m_writePipe.reset(hw, CloseHandle);
}
