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Diffstat (limited to 'plugins/eg-sampler.lv2/uris.h')
| -rw-r--r-- | plugins/eg-sampler.lv2/uris.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/plugins/eg-sampler.lv2/uris.h b/plugins/eg-sampler.lv2/uris.h new file mode 100644 index 0000000..9e44cf4 --- /dev/null +++ b/plugins/eg-sampler.lv2/uris.h @@ -0,0 +1,147 @@ +/* + LV2 Sampler Example Plugin + Copyright 2011-2016 David Robillard <d@drobilla.net> + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted, provided that the above + copyright notice and this permission notice appear in all copies. + + THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +*/ + +#ifndef SAMPLER_URIS_H +#define SAMPLER_URIS_H + +#include "lv2/lv2plug.in/ns/ext/log/log.h" +#include "lv2/lv2plug.in/ns/ext/midi/midi.h" +#include "lv2/lv2plug.in/ns/ext/state/state.h" +#include "lv2/lv2plug.in/ns/ext/parameters/parameters.h" + +#define EG_SAMPLER_URI "http://lv2plug.in/plugins/eg-sampler" +#define EG_SAMPLER__applySample EG_SAMPLER_URI "#applySample" +#define EG_SAMPLER__freeSample EG_SAMPLER_URI "#freeSample" +#define EG_SAMPLER__sample EG_SAMPLER_URI "#sample" + +typedef struct { + LV2_URID atom_Float; + LV2_URID atom_Path; + LV2_URID atom_Resource; + LV2_URID atom_Sequence; + LV2_URID atom_URID; + LV2_URID atom_eventTransfer; + LV2_URID eg_applySample; + LV2_URID eg_freeSample; + LV2_URID eg_sample; + LV2_URID midi_Event; + LV2_URID param_gain; + LV2_URID patch_Get; + LV2_URID patch_Set; + LV2_URID patch_accept; + LV2_URID patch_property; + LV2_URID patch_value; +} SamplerURIs; + +static inline void +map_sampler_uris(LV2_URID_Map* map, SamplerURIs* uris) +{ + uris->atom_Float = map->map(map->handle, LV2_ATOM__Float); + uris->atom_Path = map->map(map->handle, LV2_ATOM__Path); + uris->atom_Resource = map->map(map->handle, LV2_ATOM__Resource); + uris->atom_Sequence = map->map(map->handle, LV2_ATOM__Sequence); + uris->atom_URID = map->map(map->handle, LV2_ATOM__URID); + uris->atom_eventTransfer = map->map(map->handle, LV2_ATOM__eventTransfer); + uris->eg_applySample = map->map(map->handle, EG_SAMPLER__applySample); + uris->eg_freeSample = map->map(map->handle, EG_SAMPLER__freeSample); + uris->eg_sample = map->map(map->handle, EG_SAMPLER__sample); + uris->midi_Event = map->map(map->handle, LV2_MIDI__MidiEvent); + uris->param_gain = map->map(map->handle, LV2_PARAMETERS__gain); + uris->patch_Get = map->map(map->handle, LV2_PATCH__Get); + uris->patch_Set = map->map(map->handle, LV2_PATCH__Set); + uris->patch_accept = map->map(map->handle, LV2_PATCH__accept); + uris->patch_property = map->map(map->handle, LV2_PATCH__property); + uris->patch_value = map->map(map->handle, LV2_PATCH__value); +} + +/** + Write a message like the following to `forge`: + [source,n3] + ---- + [] + a patch:Set ; + patch:property eg:sample ; + patch:value </home/me/foo.wav> . + ---- +*/ +static inline LV2_Atom_Forge_Ref +write_set_file(LV2_Atom_Forge* forge, + const SamplerURIs* uris, + const char* filename, + const uint32_t filename_len) +{ + LV2_Atom_Forge_Frame frame; + LV2_Atom_Forge_Ref set = lv2_atom_forge_object( + forge, &frame, 0, uris->patch_Set); + + lv2_atom_forge_key(forge, uris->patch_property); + lv2_atom_forge_urid(forge, uris->eg_sample); + lv2_atom_forge_key(forge, uris->patch_value); + lv2_atom_forge_path(forge, filename, filename_len); + + lv2_atom_forge_pop(forge, &frame); + return set; +} + +/** + Get the file path from `obj` which is a message like: + [source,n3] + ---- + [] + a patch:Set ; + patch:property eg:sample ; + patch:value </home/me/foo.wav> . + ---- +*/ +static inline const char* +read_set_file(const SamplerURIs* uris, + const LV2_Atom_Object* obj) +{ + if (obj->body.otype != uris->patch_Set) { + fprintf(stderr, "Ignoring unknown message type %d\n", obj->body.otype); + return NULL; + } + + /* Get property URI. */ + const LV2_Atom* property = NULL; + lv2_atom_object_get(obj, uris->patch_property, &property, 0); + if (!property) { + fprintf(stderr, "Malformed set message has no body.\n"); + return NULL; + } else if (property->type != uris->atom_URID) { + fprintf(stderr, "Malformed set message has non-URID property.\n"); + return NULL; + } else if (((const LV2_Atom_URID*)property)->body != uris->eg_sample) { + fprintf(stderr, "Set message for unknown property.\n"); + return NULL; + } + + /* Get value. */ + const LV2_Atom* value = NULL; + lv2_atom_object_get(obj, uris->patch_value, &value, 0); + if (!value) { + fprintf(stderr, "Malformed set message has no value.\n"); + return NULL; + } else if (value->type != uris->atom_Path) { + fprintf(stderr, "Set message value is not a Path.\n"); + return NULL; + } + + return (const char*)LV2_ATOM_BODY_CONST(value); +} + +#endif /* SAMPLER_URIS_H */ |