diff options
Diffstat (limited to 'src/difference.c')
-rw-r--r-- | src/difference.c | 166 |
1 files changed, 92 insertions, 74 deletions
diff --git a/src/difference.c b/src/difference.c index bee9552..1a9db38 100644 --- a/src/difference.c +++ b/src/difference.c @@ -18,16 +18,22 @@ */ #include <stdlib.h> +#include "lv2/lv2plug.in/ns/ext/morph/morph.h" #include "lv2/lv2plug.in/ns/lv2core/lv2.h" +#include "uris.h" -#define DIFFERENCE_INPUT 0 -#define DIFFERENCE_MINUS 1 -#define DIFFERENCE_OUTPUT 2 +#define DIFFERENCE_MINUEND 0 +#define DIFFERENCE_SUBTRAHEND 1 +#define DIFFERENCE_DIFFERENCE 2 typedef struct { - float* input; - float* minus; - float* output; + float* minuend; + float* subtrahend; + float* difference; + uint32_t minuend_is_cv; + uint32_t subtrahend_is_cv; + uint32_t difference_is_cv; + URIs uris; } Difference; static void @@ -44,116 +50,128 @@ connect_port(LV2_Handle instance, Difference* plugin = (Difference*)instance; switch (port) { - case DIFFERENCE_INPUT: - plugin->input = data; + case DIFFERENCE_MINUEND: + plugin->minuend = data; break; - case DIFFERENCE_MINUS: - plugin->minus = data; + case DIFFERENCE_SUBTRAHEND: + plugin->subtrahend = data; break; - case DIFFERENCE_OUTPUT: - plugin->output = data; + case DIFFERENCE_DIFFERENCE: + plugin->difference = data; break; } } -static LV2_Handle -instantiate(const LV2_Descriptor* descriptor, - double sample_rate, - const char* bundle_path, - const LV2_Feature* const* features) -{ - Difference* plugin = (Difference*)malloc(sizeof(Difference)); - - return (LV2_Handle)plugin; -} - -static void -runDifference_iama_oa(LV2_Handle instance, - uint32_t sample_count) +static LV2_Morph_Status +morph_port(LV2_Handle instance, + uint32_t port, + LV2_URID type, + const LV2_Morph_Property*const* properties) { Difference* plugin = (Difference*)instance; - /* Input (array of floats of length sample_count) */ - const float* input = plugin->input; + if (type != plugin->uris.lv2_ControlPort && + type != plugin->uris.lv2_CVPort) { + return LV2_MORPH_ERR_BAD_TYPE; + } - /* Input to Subtract (array of floats of length sample_count) */ - const float* minus = plugin->minus; + switch (port) { + case DIFFERENCE_MINUEND: + plugin->minuend_is_cv = (type == plugin->uris.lv2_CVPort); + break; + case DIFFERENCE_SUBTRAHEND: + plugin->subtrahend_is_cv = (type == plugin->uris.lv2_CVPort); + break; + default: + return LV2_MORPH_ERR_BAD_PORT; + } - /* Output (array of floats of length sample_count) */ - float* output = plugin->output; + plugin->difference_is_cv = (plugin->minuend_is_cv || + plugin->subtrahend_is_cv); - for (uint32_t s = 0; s < sample_count; ++s) { - output[s] = input[s] - minus[s]; - } + return LV2_MORPH_SUCCESS; } -static void -runDifference_iamc_oa(LV2_Handle instance, - uint32_t sample_count) +static LV2_URID +port_type(LV2_Handle instance, + uint32_t port, + LV2_Morph_Property*const* properties) { Difference* plugin = (Difference*)instance; - /* Input (array of floats of length sample_count) */ - const float* input = plugin->input; + switch (port) { + case DIFFERENCE_DIFFERENCE: + return (plugin->difference_is_cv + ? plugin->uris.lv2_CVPort + : plugin->uris.lv2_ControlPort); + default: + return 0; + } +} - /* Input to Subtract (float value) */ - const float minus = *(plugin->minus); +static LV2_Handle +instantiate(const LV2_Descriptor* descriptor, + double sample_rate, + const char* bundle_path, + const LV2_Feature* const* features) +{ + Difference* plugin = (Difference*)malloc(sizeof(Difference)); - /* Output (array of floats of length sample_count) */ - float* output = plugin->output; + plugin->minuend_is_cv = 0; + plugin->subtrahend_is_cv = 0; + plugin->difference_is_cv = 0; - for (uint32_t s = 0; s < sample_count; ++s) { - output[s] = input[s] - minus; - } + map_uris(&plugin->uris, features); + + return (LV2_Handle)plugin; } static void -runDifference_icma_oa(LV2_Handle instance, - uint32_t sample_count) +run(LV2_Handle instance, + uint32_t sample_count) { Difference* plugin = (Difference*)instance; - /* Input (float value) */ - const float input = *(plugin->input); + /* Minuend (array of floats of length 1 or sample_count) */ + const float* minuend = plugin->minuend; - /* Input to Subtract (array of floats of length sample_count) */ - const float* minus = plugin->minus; + /* Subtrahend (array of floats of length 1 or sample_count) */ + const float* subtrahend = plugin->subtrahend; - /* Output (array of floats of length sample_count) */ - float* output = plugin->output; + /* Difference (array of floats of length 1 or sample_count) */ + float* difference = plugin->difference; + + if (!plugin->difference_is_cv) { /* TODO: Avoid this branch */ + sample_count = 1; + } for (uint32_t s = 0; s < sample_count; ++s) { - output[s] = input - minus[s]; + const float min = minuend[s * plugin->minuend_is_cv]; + const float sub = subtrahend[s * plugin->subtrahend_is_cv]; + + difference[s] = min - sub; } } -static void -runDifference_icmc_oc(LV2_Handle instance, - uint32_t sample_count) +static const void* +extension_data(const char* uri) { - Difference* plugin = (Difference*)instance; - - /* Input (float value) */ - const float input = *(plugin->input); - - /* Input to Subtract (float value) */ - const float minus = *(plugin->minus); - - /* Output Frequency (pointer to float value) */ - float* output = plugin->output; - - output[0] = input - minus; + static const LV2_Morph_Interface morph = { morph_port, port_type }; + if (!strcmp(uri, LV2_MORPH__interface)) { + return &morph; + } + return NULL; } static const LV2_Descriptor descriptor = { - "http://drobilla.net/plugins/blip/difference", + "http://drobilla.net/plugins/blop/difference", instantiate, connect_port, NULL, - runDifference_icmc_oc, + run, NULL, cleanup, - NULL, + extension_data, }; LV2_SYMBOL_EXPORT const LV2_Descriptor* |