- switch (ag->pattern) {
- case PATTERN_SQUARE:
- value = ag->amplitude;
- last_end = 0;
- for (i = 0; i < num_samples; i++) {
- if (i % 5 == 0)
- value = -value;
- if (i % 10 == 0)
- last_end = i;
- ag->pattern_data[i] = value;
- }
- ag->num_samples = last_end;
- break;
- case PATTERN_SINE:
- frequency = (double) sample_rate / ANALOG_SAMPLES_PER_PERIOD;
-
- /* Make sure the number of samples we put out is an integer
- * multiple of our period size */
- /* FIXME we actually need only one period. A ringbuffer would be
- * useful here. */
- while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0)
- num_samples--;
-
- for (i = 0; i < num_samples; i++) {
- t = (double) i / (double) sample_rate;
- ag->pattern_data[i] = ag->amplitude *
- sin(2 * G_PI * frequency * t);
- }
-
- ag->num_samples = num_samples;
- break;
- case PATTERN_TRIANGLE:
- frequency = (double) sample_rate / ANALOG_SAMPLES_PER_PERIOD;
-
- while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0)
- num_samples--;
-
- for (i = 0; i < num_samples; i++) {
- t = (double) i / (double) sample_rate;
- ag->pattern_data[i] = (2 * ag->amplitude / G_PI) *
- asin(sin(2 * G_PI * frequency * t));
- }
-
- ag->num_samples = num_samples;
- break;
- case PATTERN_SAWTOOTH:
- frequency = (double) sample_rate / ANALOG_SAMPLES_PER_PERIOD;
-
- while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0)
- num_samples--;
-
- for (i = 0; i < num_samples; i++) {
- t = (double) i / (double) sample_rate;
- ag->pattern_data[i] = 2 * ag->amplitude *
- ((t * frequency) - floor(0.5f + t * frequency));
- }
-
- ag->num_samples = num_samples;
- break;
+ /* PATTERN_SQUARE: */
+ sr_dbg("Generating %s pattern.", analog_pattern_str[PATTERN_SQUARE]);
+ pattern = g_malloc(sizeof(struct analog_pattern));
+ value = amplitude;
+ last_end = 0;
+ for (i = 0; i < num_samples; i++) {
+ if (i % 5 == 0)
+ value = -value;
+ if (i % 10 == 0)
+ last_end = i;
+ pattern->data[i] = value + offset;
+ }
+ pattern->num_samples = last_end;
+ devc->analog_patterns[PATTERN_SQUARE] = pattern;
+
+ /* Readjusting num_samples for all other patterns. */
+ while (num_samples % ANALOG_SAMPLES_PER_PERIOD != 0)
+ num_samples--;
+
+ /* PATTERN_SINE: */
+ sr_dbg("Generating %s pattern.", analog_pattern_str[PATTERN_SINE]);
+ pattern = g_malloc(sizeof(struct analog_pattern));
+ for (i = 0; i < num_samples; i++) {
+ t = (double) i / (double) devc->cur_samplerate;
+ pattern->data[i] = sin(2 * G_PI * frequency * t) * amplitude + offset;
+ }
+ pattern->num_samples = last_end;
+ devc->analog_patterns[PATTERN_SINE] = pattern;
+
+ /* PATTERN_TRIANGLE: */
+ sr_dbg("Generating %s pattern.", analog_pattern_str[PATTERN_TRIANGLE]);
+ pattern = g_malloc(sizeof(struct analog_pattern));
+ for (i = 0; i < num_samples; i++) {
+ t = (double) i / (double) devc->cur_samplerate;
+ pattern->data[i] = (2 / G_PI) * asin(sin(2 * G_PI * frequency * t)) *
+ amplitude + offset;