* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <extdef.h>
#include <algorithm>
+#include "analog.hpp"
#include "analogsegment.hpp"
using std::lock_guard;
logf(EnvelopeScaleFactor);
const uint64_t AnalogSegment::EnvelopeDataUnit = 64*1024; // bytes
-AnalogSegment::AnalogSegment(
- uint64_t samplerate, const uint64_t expected_num_samples) :
- Segment(samplerate, sizeof(float))
+AnalogSegment::AnalogSegment(Analog& owner, uint64_t samplerate) :
+ Segment(samplerate, sizeof(float)),
+ owner_(owner),
+ min_value_(0),
+ max_value_(0)
{
- set_capacity(expected_num_samples);
-
lock_guard<recursive_mutex> lock(mutex_);
memset(envelope_levels_, 0, sizeof(envelope_levels_));
}
lock_guard<recursive_mutex> lock(mutex_);
- // If we're out of memory, this will throw std::bad_alloc
- data_.resize((sample_count_ + sample_count) * sizeof(float));
+ uint64_t prev_sample_count = sample_count_;
- float *dst = (float*)data_.data() + sample_count_;
- const float *dst_end = dst + sample_count;
- while (dst != dst_end)
- {
- *dst++ = *data;
+ for (uint32_t i=0; i < sample_count; i++) {
+ append_single_sample((void*)data);
data += stride;
}
- sample_count_ += sample_count;
-
// Generate the first mip-map from the data
append_payload_to_envelope_levels();
+
+ if (sample_count > 1)
+ owner_.notify_samples_added(this, prev_sample_count + 1,
+ prev_sample_count + 1 + sample_count);
+ else
+ owner_.notify_samples_added(this, prev_sample_count + 1,
+ prev_sample_count + 1);
}
const float* AnalogSegment::get_samples(
lock_guard<recursive_mutex> lock(mutex_);
- float *const data = new float[end_sample - start_sample];
- memcpy(data, (float*)data_.data() + start_sample, sizeof(float) *
- (end_sample - start_sample));
- return data;
+ return (float*)get_raw_samples(start_sample, (end_sample - start_sample));
+}
+
+const std::pair<float, float> AnalogSegment::get_min_max() const
+{
+ return std::make_pair(min_value_, max_value_);
+}
+
+SegmentAnalogDataIterator* AnalogSegment::begin_sample_iteration(uint64_t start)
+{
+ return (SegmentAnalogDataIterator*)begin_raw_sample_iteration(start);
+}
+
+void AnalogSegment::continue_sample_iteration(SegmentAnalogDataIterator* it, uint64_t increase)
+{
+ Segment::continue_raw_sample_iteration((SegmentRawDataIterator*)it, increase);
+}
+
+void AnalogSegment::end_sample_iteration(SegmentAnalogDataIterator* it)
+{
+ Segment::end_raw_sample_iteration((SegmentRawDataIterator*)it);
}
void AnalogSegment::get_envelope_section(EnvelopeSection &s,
{
const uint64_t new_data_length = ((e.length + EnvelopeDataUnit - 1) /
EnvelopeDataUnit) * EnvelopeDataUnit;
- if (new_data_length > e.data_length)
- {
+ if (new_data_length > e.data_length) {
e.data_length = new_data_length;
e.samples = (EnvelopeSample*)realloc(e.samples,
new_data_length * sizeof(EnvelopeSample));
Envelope &e0 = envelope_levels_[0];
uint64_t prev_length;
EnvelopeSample *dest_ptr;
+ SegmentRawDataIterator* it;
// Expand the data buffer to fit the new samples
prev_length = e0.length;
e0.length = sample_count_ / EnvelopeScaleFactor;
+ // Calculate min/max values in case we have too few samples for an envelope
+ if (sample_count_ < EnvelopeScaleFactor) {
+ it = begin_raw_sample_iteration(0);
+ for (uint64_t i = 0; i < sample_count_; i++) {
+ const float sample = *((float*)it->value);
+ if (sample < min_value_) min_value_ = sample;
+ if (sample > max_value_) max_value_ = sample;
+ continue_raw_sample_iteration(it, 1);
+ }
+ end_raw_sample_iteration(it);
+ }
+
// Break off if there are no new samples to compute
if (e0.length == prev_length)
return;
dest_ptr = e0.samples + prev_length;
// Iterate through the samples to populate the first level mipmap
- const float *const end_src_ptr = (float*)data_.data() +
- e0.length * EnvelopeScaleFactor;
- for (const float *src_ptr = (float*)data_.data() +
- prev_length * EnvelopeScaleFactor;
- src_ptr < end_src_ptr; src_ptr += EnvelopeScaleFactor)
- {
+ uint64_t start_sample = prev_length * EnvelopeScaleFactor;
+ uint64_t end_sample = e0.length * EnvelopeScaleFactor;
+
+ it = begin_raw_sample_iteration(start_sample);
+ for (uint64_t i = start_sample; i < end_sample; i += EnvelopeScaleFactor) {
+ const float* samples = (float*)it->value;
+
const EnvelopeSample sub_sample = {
- *min_element(src_ptr, src_ptr + EnvelopeScaleFactor),
- *max_element(src_ptr, src_ptr + EnvelopeScaleFactor),
+ *min_element(samples, samples + EnvelopeScaleFactor),
+ *max_element(samples, samples + EnvelopeScaleFactor),
};
+ if (sub_sample.min < min_value_) min_value_ = sub_sample.min;
+ if (sub_sample.max > max_value_) max_value_ = sub_sample.max;
+
+ continue_raw_sample_iteration(it, EnvelopeScaleFactor);
*dest_ptr++ = sub_sample;
}
+ end_raw_sample_iteration(it);
// Compute higher level mipmaps
- for (unsigned int level = 1; level < ScaleStepCount; level++)
- {
+ for (unsigned int level = 1; level < ScaleStepCount; level++) {
Envelope &e = envelope_levels_[level];
const Envelope &el = envelope_levels_[level-1];
prev_length = e.length;
e.length = el.length / EnvelopeScaleFactor;
- // Break off if there are no more samples to computed
+ // Break off if there are no more samples to be computed
if (e.length == prev_length)
break;
reallocate_envelope(e);
- // Subsample the level lower level
+ // Subsample the lower level
const EnvelopeSample *src_ptr =
el.samples + prev_length * EnvelopeScaleFactor;
const EnvelopeSample *const end_dest_ptr = e.samples + e.length;
+
for (dest_ptr = e.samples + prev_length;
- dest_ptr < end_dest_ptr; dest_ptr++)
- {
+ dest_ptr < end_dest_ptr; dest_ptr++) {
const EnvelopeSample *const end_src_ptr =
src_ptr + EnvelopeScaleFactor;
EnvelopeSample sub_sample = *src_ptr++;
- while (src_ptr < end_src_ptr)
- {
- sub_sample.min = min(sub_sample.min, src_ptr->min);
+ while (src_ptr < end_src_ptr) {
+ sub_sample.min = min(sub_sample.min, src_ptr->min);;
sub_sample.max = max(sub_sample.max, src_ptr->max);
src_ptr++;
}
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