, _scale_amplitude (Properties::scale_amplitude, 1.0)
#define AUDIOREGION_COPY_STATE(other) \
- _envelope_active (other->_envelope_active) \
- , _default_fade_in (other->_default_fade_in) \
- , _default_fade_out (other->_default_fade_out) \
- , _fade_in_active (other->_fade_in_active) \
- , _fade_out_active (other->_fade_out_active) \
- , _scale_amplitude (other->_scale_amplitude)
+ _envelope_active (Properties::envelope_active, other->_envelope_active) \
+ , _default_fade_in (Properties::default_fade_in, other->_default_fade_in) \
+ , _default_fade_out (Properties::default_fade_out, other->_default_fade_out) \
+ , _fade_in_active (Properties::fade_in_active, other->_fade_in_active) \
+ , _fade_out_active (Properties::fade_out_active, other->_fade_out_active) \
+ , _scale_amplitude (Properties::scale_amplitude, other->_scale_amplitude)
/* a Session will reset these to its chosen defaults by calling AudioRegion::set_default_fade() */
void
, _automatable (other->session())
, _fade_in (new AutomationList (*other->_fade_in))
, _fade_out (new AutomationList (*other->_fade_out))
- /* XXX is this guaranteed to work for all values of offset+offset_relative? */
- , _envelope (new AutomationList (*other->_envelope, _start, _start + _length))
+ /* As far as I can see, the _envelope's times are relative to region position, and have nothing
+ to do with sources (and hence _start). So when we copy the envelope, we just use the supplied offset.
+ */
+ , _envelope (new AutomationList (*other->_envelope, offset, other->_length))
, _fade_in_suspended (0)
, _fade_out_suspended (0)
{
framecnt_t to_read;
bool raw = (rops == ReadOpsNone);
+ if (n_channels() == 0) {
+ return 0;
+ }
+
if (muted() && !raw) {
return 0; /* read nothing */
}
we don't have.
*/
- memset (mixdown_buffer, 0, sizeof (Sample) * cnt);
+ if (Config->get_replicate_missing_region_channels()) {
+ /* track is N-channel, this region has less channels, so use a relevant channel
+ */
+
+ uint32_t channel = n_channels() % chan_n;
+ boost::shared_ptr<AudioSource> src = audio_source (channel);
+
+ if (src->read (mixdown_buffer, _start + internal_offset, to_read) != to_read) {
+ return 0; /* "read nothing" */
+ }
+
+ /* adjust read data count appropriately since this was a duplicate read */
+ src->dec_read_data_count (to_read);
+ } else {
+ memset (mixdown_buffer, 0, sizeof (Sample) * cnt);
+ }
}
if (rops & ReadOpsFades) {
}
}
- if (!opaque()) {
+ if (!opaque() && (buf != mixdown_buffer)) {
/* gack. the things we do for users.
*/
send_change (PropertyChange (Properties::scale_amplitude));
}
-void
-AudioRegion::normalize_to (float target_dB)
+/** @return the maximum (linear) amplitude of the region */
+double
+AudioRegion::maximum_amplitude () const
{
- const framecnt_t blocksize = 64 * 1024;
- Sample buf[blocksize];
- framepos_t fpos;
- framepos_t fend;
- framecnt_t to_read;
+ framepos_t fpos = _start;
+ framepos_t const fend = _start + _length;
double maxamp = 0;
- gain_t target = dB_to_coefficient (target_dB);
-
- if (target == 1.0f) {
- /* do not normalize to precisely 1.0 (0 dBFS), to avoid making it appear
- that we may have clipped.
- */
- target -= FLT_EPSILON;
- }
-
- fpos = _start;
- fend = _start + _length;
-
- /* first pass: find max amplitude */
+ framecnt_t const blocksize = 64 * 1024;
+ Sample buf[blocksize];
+
while (fpos < fend) {
uint32_t n;
- to_read = min (fend - fpos, blocksize);
+ framecnt_t const to_read = min (fend - fpos, blocksize);
for (n = 0; n < n_channels(); ++n) {
/* read it in */
if (read_raw_internal (buf, fpos, to_read, 0) != to_read) {
- return;
+ return 0;
}
maxamp = compute_peak (buf, to_read, maxamp);
}
fpos += to_read;
- };
+ }
+
+ return maxamp;
+}
+
+/** Normalize using a given maximum amplitude and target, so that region
+ * _scale_amplitude becomes target / max_amplitude.
+ */
+void
+AudioRegion::normalize (float max_amplitude, float target_dB)
+{
+ gain_t target = dB_to_coefficient (target_dB);
+
+ if (target == 1.0f) {
+ /* do not normalize to precisely 1.0 (0 dBFS), to avoid making it appear
+ that we may have clipped.
+ */
+ target -= FLT_EPSILON;
+ }
- if (maxamp == 0.0f) {
+ if (max_amplitude == 0.0f) {
/* don't even try */
return;
}
- if (maxamp == target) {
+ if (max_amplitude == target) {
/* we can't do anything useful */
return;
}
- /* compute scale factor */
-
- _scale_amplitude = target/maxamp;
-
- /* tell the diskstream we're in */
-
- boost::shared_ptr<Playlist> pl (playlist());
-
- if (pl) {
- pl->ContentsChanged();
- }
-
- /* tell everybody else */
-
- send_change (PropertyChange (Properties::scale_amplitude));
+ set_scale_amplitude (target / max_amplitude);
}
void