using namespace ARDOUR;
using namespace PBD;
+#ifdef PLATFORM_WINDOWS
+const uint32_t ResampledImportableSource::blocksize = 524288U;
+#else
const uint32_t ResampledImportableSource::blocksize = 16384U;
+#endif
-ResampledImportableSource::ResampledImportableSource (boost::shared_ptr<ImportableSource> src, nframes_t rate, SrcQuality srcq)
+ResampledImportableSource::ResampledImportableSource (boost::shared_ptr<ImportableSource> src, framecnt_t rate, SrcQuality srcq)
: source (src)
+ , src_state (0)
{
- int err;
-
- source->seek (0);
-
- /* Initialize the sample rate converter. */
-
- int src_type = SRC_SINC_BEST_QUALITY;
+ _src_type = SRC_SINC_BEST_QUALITY;
switch (srcq) {
case SrcBest:
- src_type = SRC_SINC_BEST_QUALITY;
+ _src_type = SRC_SINC_BEST_QUALITY;
break;
case SrcGood:
- src_type = SRC_SINC_MEDIUM_QUALITY;
+ _src_type = SRC_SINC_MEDIUM_QUALITY;
break;
case SrcQuick:
- src_type = SRC_SINC_FASTEST;
+ _src_type = SRC_SINC_FASTEST;
break;
case SrcFast:
- src_type = SRC_ZERO_ORDER_HOLD;
+ _src_type = SRC_ZERO_ORDER_HOLD;
break;
case SrcFastest:
- src_type = SRC_LINEAR;
+ _src_type = SRC_LINEAR;
break;
}
- if ((src_state = src_new (src_type, source->channels(), &err)) == 0) {
- error << string_compose(_("Import: src_new() failed : %1"), src_strerror (err)) << endmsg ;
- throw failed_constructor ();
- }
-
- src_data.end_of_input = 0 ; /* Set this later. */
-
- /* Start with zero to force load in while loop. */
+ input = new float[blocksize];
- src_data.input_frames = 0 ;
- src_data.data_in = input ;
+ seek (0);
src_data.src_ratio = ((float) rate) / source->samplerate();
-
- input = new float[blocksize];
}
ResampledImportableSource::~ResampledImportableSource ()
delete [] input;
}
-nframes_t
-ResampledImportableSource::read (Sample* output, nframes_t nframes)
+framecnt_t
+ResampledImportableSource::read (Sample* output, framecnt_t nframes)
{
int err;
/* The last read will not be a full buffer, so set end_of_input. */
- if ((nframes_t) src_data.input_frames < blocksize) {
+ if ((framecnt_t) src_data.input_frames < blocksize) {
src_data.end_of_input = true;
}
if (!src_data.end_of_input) {
src_data.output_frames = nframes / source->channels();
} else {
- src_data.output_frames = src_data.input_frames;
+ src_data.output_frames = std::min ((framecnt_t) src_data.input_frames, nframes / source->channels());
}
if ((err = src_process (src_state, &src_data))) {
return src_data.output_frames_gen * source->channels();
}
+void
+ResampledImportableSource::seek (framepos_t pos)
+{
+ source->seek (pos);
+
+ /* and reset things so that we start from scratch with the conversion */
+
+ if (src_state) {
+ src_delete (src_state);
+ }
+
+ int err;
+
+ if ((src_state = src_new (_src_type, source->channels(), &err)) == 0) {
+ error << string_compose(_("Import: src_new() failed : %1"), src_strerror (err)) << endmsg ;
+ throw failed_constructor ();
+ }
+
+ src_data.input_frames = 0;
+ src_data.data_in = input;
+ src_data.end_of_input = 0;
+}
+
+framepos_t
+ResampledImportableSource::natural_position () const
+{
+ return source->natural_position() * ratio ();
+}