int sc_plugin_interface::buffer_write(uint32_t index, const char * filename, const char * header_format, const char * sample_format,
uint32_t start, uint32_t frames, bool leave_open)
{
SndBuf * buf = World_GetNRTBuf(&world, index);
int format = headerFormatFromString(header_format) | sampleFormatFromString(sample_format);
SndfileHandle sf(filename, SFM_WRITE, format, buf->channels, buf->samplerate);
if (!sf)
return -1;
if (frames == 0xffffffff)
frames = buf->frames;
const uint32_t remain = uint32_t(buf->frames) > start ? buf->frames - start : 0;
const uint32_t frames_to_write = std::min(remain, frames);
if (frames_to_write)
sf.writef(buf->data + start * buf->channels, frames_to_write);
if (leave_open && !buf->sndfile)
buf->sndfile = sf.takeOwnership();
return 0;
}
static inline int sndfileFormatInfoFromStrings(struct SF_INFO *info, const char *headerFormatString, const char *sampleFormatString)
{
int headerFormat = headerFormatFromString(headerFormatString);
if (!headerFormat) return kSCErr_Failed;
int sampleFormat = sampleFormatFromString(sampleFormatString);
if (!sampleFormat) return kSCErr_Failed;
info->format = (unsigned int)(headerFormat | sampleFormat);
return kSCErr_None;
}
