static bool
wava_Open (THIS_PTR, uio_DirHandle *dir, const char *filename)
{
TFB_WaveSoundDecoder* wava = (TFB_WaveSoundDecoder*) This;
WAVFileHdr_Struct FileHdr;
WAVChunkHdr_Struct ChunkHdr;
wava->fp = uio_fopen (dir, filename, "rb");
if (!wava->fp)
{
wava->last_error = errno;
return false;
}
wava->data_size = 0;
wava->data_ofs = 0;
// read wave header
if (!wava_readFileHeader (wava, &FileHdr))
{
wava->last_error = errno;
wava_Close (This);
return false;
}
if (FileHdr.Id != RIFF || FileHdr.Type != WAVE)
{
log_add (log_Warning, "wava_Open(): "
"not a wave file, ID 0x%08x, Type 0x%08x",
FileHdr.Id, FileHdr.Type);
wava_Close (This);
return false;
}
for (FileHdr.Size = ((FileHdr.Size + 1) & ~1) - 4; FileHdr.Size != 0;
FileHdr.Size -= (((ChunkHdr.Size + 1) & ~1) + 8))
{
if (!wava_readChunkHeader (wava, &ChunkHdr))
{
wava->last_error = errno;
wava_Close (This);
return false;
}
if (ChunkHdr.Id == FMT)
{
if (!wava_readFormatHeader (wava, &wava->FmtHdr))
{
wava->last_error = errno;
wava_Close (This);
return false;
}
uio_fseek (wava->fp, ChunkHdr.Size - 16, SEEK_CUR);
}
else
{
if (ChunkHdr.Id == DATA)
{
wava->data_size = ChunkHdr.Size;
wava->data_ofs = uio_ftell (wava->fp);
}
uio_fseek (wava->fp, ChunkHdr.Size, SEEK_CUR);
}
uio_fseek (wava->fp, ChunkHdr.Size & 1, SEEK_CUR);
}
if (!wava->data_size || !wava->data_ofs)
{
log_add (log_Warning, "wava_Open(): bad wave file,"
" no DATA chunk found");
wava_Close (This);
return false;
}
if (wava->FmtHdr.Format == 0x0001)
{
This->format = (wava->FmtHdr.Channels == 1 ?
(wava->FmtHdr.BitsPerSample == 8 ?
wava_formats->mono8 : wava_formats->mono16)
:
(wava->FmtHdr.BitsPerSample == 8 ?
wava_formats->stereo8 : wava_formats->stereo16)
);
This->frequency = wava->FmtHdr.SamplesPerSec;
}
else
{
log_add (log_Warning, "wava_Open(): unsupported format %x",
wava->FmtHdr.Format);
wava_Close (This);
return false;
}
uio_fseek (wava->fp, wava->data_ofs, SEEK_SET);
wava->max_pcm = wava->data_size / wava->FmtHdr.BlockAlign;
wava->cur_pcm = 0;
This->length = (float) wava->max_pcm / wava->FmtHdr.SamplesPerSec;
wava->last_error = 0;
return true;
}
static bool
wava_Open (THIS_PTR, uio_DirHandle *dir, const char *filename)
{
TFB_WaveSoundDecoder* wava = (TFB_WaveSoundDecoder*) This;
wave_FileHeader fileHdr;
wave_ChunkHeader chunkHdr;
wava->fp = uio_fopen (dir, filename, "rb");
if (!wava->fp)
{
wava->last_error = errno;
return false;
}
wava->data_size = 0;
wava->data_ofs = 0;
// read wave header
if (!wava_readFileHeader (wava, &fileHdr))
{
wava->last_error = errno;
wava_Close (This);
return false;
}
if (fileHdr.id != wave_RiffID || fileHdr.type != wave_WaveID)
{
log_add (log_Warning, "wava_Open(): "
"not a wave file, ID 0x%08x, Type 0x%08x",
fileHdr.id, fileHdr.type);
wava_Close (This);
return false;
}
for (fileHdr.size = ((fileHdr.size + 1) & ~1) - 4; fileHdr.size != 0;
fileHdr.size -= (((chunkHdr.size + 1) & ~1) + 8))
{
if (!wava_readChunkHeader (wava, &chunkHdr))
{
wava_Close (This);
return false;
}
if (chunkHdr.id == wave_FmtID)
{
if (!wava_readFormatHeader (wava, &wava->fmtHdr))
{
wava_Close (This);
return false;
}
uio_fseek (wava->fp, chunkHdr.size - 16, SEEK_CUR);
}
else
{
if (chunkHdr.id == wave_DataID)
{
wava->data_size = chunkHdr.size;
wava->data_ofs = uio_ftell (wava->fp);
}
uio_fseek (wava->fp, chunkHdr.size, SEEK_CUR);
}
// 2-align the file ptr
// XXX: I do not think this is necessary in WAVE files;
// possibly a remnant of ported AIFF reader
uio_fseek (wava->fp, chunkHdr.size & 1, SEEK_CUR);
}
if (!wava->data_size || !wava->data_ofs)
{
log_add (log_Warning, "wava_Open(): bad wave file,"
" no DATA chunk found");
wava_Close (This);
return false;
}
if (wava->fmtHdr.format != 0x0001)
{ // not a PCM format
log_add (log_Warning, "wava_Open(): unsupported format %x",
wava->fmtHdr.format);
wava_Close (This);
return false;
}
if (wava->fmtHdr.channels != 1 && wava->fmtHdr.channels != 2)
{
log_add (log_Warning, "wava_Open(): unsupported number of channels %u",
(unsigned)wava->fmtHdr.channels);
wava_Close (This);
return false;
}
This->format = (wava->fmtHdr.channels == 1 ?
(wava->fmtHdr.bitsPerSample == 8 ?
wava_formats->mono8 : wava_formats->mono16)
:
(wava->fmtHdr.bitsPerSample == 8 ?
wava_formats->stereo8 : wava_formats->stereo16)
);
This->frequency = wava->fmtHdr.samplesPerSec;
uio_fseek (wava->fp, wava->data_ofs, SEEK_SET);
wava->max_pcm = wava->data_size / wava->fmtHdr.blockAlign;
wava->cur_pcm = 0;
This->length = (float) wava->max_pcm / wava->fmtHdr.samplesPerSec;
wava->last_error = 0;
return true;
}