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add channel_count() to audio source API

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This commit is contained in:
Paul Davis 2015-05-08 16:28:46 -04:00
parent 9c95a8bdea
commit 04b2d34362
4 changed files with 39 additions and 1 deletions
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6
libs/ardour/ardour/audioregion.h
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@ -73,7 +73,11 @@ class LIBARDOUR_API AudioRegion : public Region
bool speed_mismatch (float) const;
boost::shared_ptr<AudioSource> audio_source (uint32_t n=0) const;
// if several audio files associated with a region,
// information about file with MAX channel count will be provided
uint32_t get_related_audio_file_channel_count () const;
void set_scale_amplitude (gain_t);
gain_t scale_amplitude() const { return _scale_amplitude; }

2
libs/ardour/ardour/coreaudiosource.h
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@ -39,6 +39,8 @@ class LIBARDOUR_API CoreAudioSource : public AudioFileSource {
float sample_rate() const;
int update_header (framepos_t when, struct tm&, time_t);
uint32_t channel_count () const { return n_channels; }
int flush_header () {return 0;};
void set_header_timeline_position () {};
bool clamped_at_unity () const { return false; }

1
libs/ardour/ardour/sndfilesource.h
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@ -66,6 +66,7 @@ class LIBARDOUR_API SndFileSource : public AudioFileSource {
bool set_destructive (bool yn);
bool one_of_several_channels () const;
uint32_t channel_count () const { return _info.channels; }
bool clamped_at_unity () const;

31
libs/ardour/audioregion.cc
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@ -49,6 +49,9 @@
#include "ardour/parameter_descriptor.h"
#include "ardour/progress.h"
#include "ardour/sndfilesource.h"
#include "ardour/coreaudiosource.h"
#include "i18n.h"
#include <locale.h>
@ -1562,6 +1565,34 @@ AudioRegion::audio_source (uint32_t n) const
return boost::dynamic_pointer_cast<AudioSource>(source(n));
}
uint32_t
AudioRegion::get_related_audio_file_channel_count () const
{
uint32_t chan_count = 0;
for (SourceList::const_iterator i = _sources.begin(); i != _sources.end(); ++i) {
boost::shared_ptr<SndFileSource> sndf = dynamic_pointer_cast<SndFileSource>(*i);
if (sndf ) {
if (sndf->channel_count() > chan_count) {
chan_count = sndf->channel_count();
}
}
#ifdef HAVE_COREAUDIO
else {
boost::shared_ptr<CoreAudioSource> cauf = dynamic_pointer_cast<CoreAudioSource>(*i);
if (cauf) {
if (cauf->channel_count() > chan_count) {
chan_count = cauf->channel_count();
}
}
}
#endif // HAVE_COREAUDIO
}
return chan_count;
}
int
AudioRegion::adjust_transients (frameoffset_t delta)
{