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author | David Robillard <d@drobilla.net> | 2012-05-31 06:03:45 +0000 |
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committer | David Robillard <d@drobilla.net> | 2012-05-31 06:03:45 +0000 |
commit | 8b46fd1ff51b29cded517c9c2d166611e8c453fc (patch) | |
tree | 14a338294d302e663818570796bb5311297a9748 /src/pulse.c | |
parent | 9529f203c09d6dc8f4c2f12c3add9ec906f4bdba (diff) | |
download | blop.lv2-8b46fd1ff51b29cded517c9c2d166611e8c453fc.tar.gz blop.lv2-8b46fd1ff51b29cded517c9c2d166611e8c453fc.tar.bz2 blop.lv2-8b46fd1ff51b29cded517c9c2d166611e8c453fc.zip |
Blip => Blop. I give up trying to give ports new names.
git-svn-id: http://svn.drobilla.net/lad/trunk/plugins/blop.lv2@4484 a436a847-0d15-0410-975c-d299462d15a1
Diffstat (limited to 'src/pulse.c')
-rw-r--r-- | src/pulse.c | 205 |
1 files changed, 64 insertions, 141 deletions
diff --git a/src/pulse.c b/src/pulse.c index 8890fbd..51b1147 100644 --- a/src/pulse.c +++ b/src/pulse.c @@ -18,7 +18,9 @@ */ #include <stdlib.h> +#include "lv2/lv2plug.in/ns/ext/morph/morph.h" #include "lv2/lv2plug.in/ns/lv2core/lv2.h" +#include "uris.h" #include "wavedata.h" #define PULSE_FREQUENCY 0 @@ -30,7 +32,10 @@ typedef struct { float* pulsewidth; float* output; float phase; + uint32_t frequency_is_cv; + uint32_t pulsewidth_is_cv; Wavedata wdat; + URIs uris; } Pulse; static void @@ -53,6 +58,33 @@ connect_port(LV2_Handle instance, } } +static LV2_Morph_Status +morph_port(LV2_Handle instance, + uint32_t port, + LV2_URID type, + const LV2_Morph_Property*const* properties) +{ + Pulse* plugin = (Pulse*)instance; + + if (type != plugin->uris.lv2_ControlPort && + type != plugin->uris.lv2_CVPort) { + return LV2_MORPH_ERR_BAD_TYPE; + } + + switch (port) { + case PULSE_FREQUENCY: + plugin->frequency_is_cv = (type == plugin->uris.lv2_CVPort); + break; + case PULSE_PULSEWIDTH: + plugin->pulsewidth_is_cv = (type == plugin->uris.lv2_CVPort); + break; + default: + return LV2_MORPH_ERR_BAD_PORT; + } + + return LV2_MORPH_SUCCESS; +} + static LV2_Handle instantiate(const LV2_Descriptor* descriptor, double sample_rate, @@ -67,6 +99,11 @@ instantiate(const LV2_Descriptor* descriptor, return 0; } + plugin->frequency_is_cv = 0; + plugin->pulsewidth_is_cv = 0; + map_uris(&plugin->uris, features); + wavedata_get_table(&plugin->wdat, 440.0); + return (LV2_Handle)plugin; } @@ -88,8 +125,8 @@ activate(LV2_Handle instance) } static void -runPulse_fapa_oa(LV2_Handle instance, - uint32_t sample_count) +run(LV2_Handle instance, + uint32_t sample_count) { Pulse* plugin = (Pulse*)instance; @@ -106,114 +143,32 @@ runPulse_fapa_oa(LV2_Handle instance, Wavedata* wdat = &plugin->wdat; float phase = plugin->phase; - float freq; - float pwidth; - float phase_shift; + float last_pwidth = pulsewidth[0]; + float pwidth = f_clip(last_pwidth, 0.0f, 1.0f); + float dc_shift = 1.0 - (2.0 * pwidth); + float phase_shift = pwidth * wdat->sample_rate; for (uint32_t s = 0; s < sample_count; ++s) { - freq = frequency[s]; - pwidth = f_clip(pulsewidth[s], 0.0f, 1.0f); - phase_shift = pwidth * wdat->sample_rate; - - /* Lookup which table to use from frequency */ - wavedata_get_table(wdat, freq); - - /* Get samples from sawtooth and phase shifted inverted sawtooth, - with approriate DC offset */ - output[s] = wavedata_get_sample(wdat, phase) - - wavedata_get_sample(wdat, phase + phase_shift) - + 1.0f - (2.0f * pwidth); - - /* Update phase, wrapping if necessary */ - phase += wdat->frequency; - if (phase < 0.0f) { - phase += wdat->sample_rate; - } else if (phase > wdat->sample_rate) { - phase -= wdat->sample_rate; + const float freq = frequency[s * plugin->frequency_is_cv]; + if (freq != wdat->frequency) { + /* Frequency changed, look up table to play */ + wavedata_get_table(wdat, freq); } - } - plugin->phase = phase; -} - -static void -runPulse_fapc_oa(LV2_Handle instance, - uint32_t sample_count) -{ - Pulse* plugin = (Pulse*)instance; - - /* Frequency (array of float of length sample_count) */ - const float* frequency = plugin->frequency; - - /* Pulse Width (float value) */ - const float pulsewidth = f_clip(*(plugin->pulsewidth), 0.0f, 1.0f); - - /* Output (pointer to float value) */ - float* output = plugin->output; - /* Instance data */ - Wavedata* wdat = &plugin->wdat; - float phase = plugin->phase; - - float freq; - float dc_shift = 1.0 - (2.0 * pulsewidth); - float phase_shift = pulsewidth * wdat->sample_rate; - - for (uint32_t s = 0; s < sample_count; ++s) { - freq = frequency[s]; - - /* Lookup which table to use from frequency */ - wavedata_get_table(wdat, freq); - - /* Get samples from sawtooth and phase shifted inverted sawtooth, - with approriate DC offset */ - output[s] = wavedata_get_sample(wdat, phase) - - wavedata_get_sample(wdat, phase + phase_shift) - + dc_shift; - - /* Update phase, wrapping if necessary */ - phase += wdat->frequency; - if (phase < 0.0f) { - phase += wdat->sample_rate; - } else if (phase > wdat->sample_rate) { - phase -= wdat->sample_rate; + const float this_pwidth = pulsewidth[s * plugin->pulsewidth_is_cv]; + if (this_pwidth != last_pwidth) { + /* Pulsewidth changed, recalculate */ + last_pwidth = this_pwidth; + pwidth = f_clip(this_pwidth, 0.0f, 1.0f); + dc_shift = 1.0f - (2.0f * pwidth); + phase_shift = pwidth * wdat->sample_rate; } - } - plugin->phase = phase; -} - -static void -runPulse_fcpa_oa(LV2_Handle instance, - uint32_t sample_count) -{ - Pulse* plugin = (Pulse*)instance; - - /* Frequency (float value) */ - const float frequency = *(plugin->frequency); - - /* Pulse Width (array of float of length sample_count) */ - const float* pulsewidth = plugin->pulsewidth; - - /* Output (pointer to float value) */ - float* output = plugin->output; - - /* Instance data */ - Wavedata* wdat = &plugin->wdat; - float phase = plugin->phase; - - float pwidth; - float phase_shift; - - wavedata_get_table(wdat, frequency); - - for (uint32_t s = 0; s < sample_count; ++s) { - pwidth = f_clip(pulsewidth[s], 0.0f, 1.0f); - phase_shift = pwidth * wdat->sample_rate; /* Get samples from sawtooth and phase shifted inverted sawtooth, with approriate DC offset */ output[s] = wavedata_get_sample(wdat, phase) - wavedata_get_sample(wdat, phase + phase_shift) - + 1.0f - (2.0f * pwidth); + + dc_shift; /* Update phase, wrapping if necessary */ phase += wdat->frequency; @@ -226,57 +181,25 @@ runPulse_fcpa_oa(LV2_Handle instance, plugin->phase = phase; } -static void -runPulse_fcpc_oa(LV2_Handle instance, - uint32_t sample_count) +static const void* +extension_data(const char* uri) { - Pulse* plugin = (Pulse*)instance; - - /* Frequency (float value) */ - const float frequency = *(plugin->frequency); - - /* Pulse Width (float value) */ - const float pulsewidth = f_clip(*(plugin->pulsewidth), 0.0f, 1.0f); - - /* Output (pointer to float value) */ - float* output = plugin->output; - - /* Instance data */ - Wavedata* wdat = &plugin->wdat; - float phase = plugin->phase; - - float dc_shift = 1.0f - (2.0f * pulsewidth); - float phase_shift = pulsewidth * wdat->sample_rate; - - wavedata_get_table(wdat, frequency); - - for (uint32_t s = 0; s < sample_count; ++s) { - /* Get samples from sawtooth and phase shifted inverted sawtooth, - with approriate DC offset */ - output[s] = wavedata_get_sample(wdat, phase) - - wavedata_get_sample(wdat, phase + phase_shift) - + dc_shift; - - /* Update phase, wrapping if necessary */ - phase += wdat->frequency; - if (phase < 0.0f) { - phase += wdat->sample_rate; - } else if (phase > wdat->sample_rate) { - phase -= wdat->sample_rate; - } + static const LV2_Morph_Interface morph = { morph_port, NULL }; + if (!strcmp(uri, LV2_MORPH__interface)) { + return &morph; } - plugin->phase = phase; + return NULL; } static const LV2_Descriptor descriptor = { - "http://drobilla.net/plugins/blip/pulse", + "http://drobilla.net/plugins/blop/pulse", instantiate, connect_port, activate, - runPulse_fcpc_oa, + run, NULL, cleanup, - NULL, + extension_data, }; LV2_SYMBOL_EXPORT const LV2_Descriptor* |