diff options
Diffstat (limited to 'src/jalv.c')
| -rw-r--r-- | src/jalv.c | 46 |
1 files changed, 45 insertions, 1 deletions
@@ -37,6 +37,7 @@ #endif #include "lv2/lv2plug.in/ns/ext/atom/atom.h" +#include "lv2/lv2plug.in/ns/ext/buf-size/buf-size.h" #include "lv2/lv2plug.in/ns/ext/event/event.h" #include "lv2/lv2plug.in/ns/ext/presets/presets.h" #include "lv2/lv2plug.in/ns/ext/time/time.h" @@ -108,13 +109,15 @@ static LV2_Feature instance_feature = { NS_EXT "instance-access", NULL }; static LV2_Feature make_path_feature = { LV2_STATE__makePath, NULL }; static LV2_Feature schedule_feature = { LV2_WORKER__schedule, NULL }; static LV2_Feature log_feature = { LV2_LOG__log, NULL }; +static LV2_Feature buf_size_feature = { LV2_BUF_SIZE__access, NULL }; -const LV2_Feature* features[9] = { +const LV2_Feature* features[10] = { &uri_map_feature, &map_feature, &unmap_feature, &instance_feature, &make_path_feature, &schedule_feature, &log_feature, + &buf_size_feature, NULL }; @@ -306,6 +309,7 @@ int jack_buffer_size_cb(jack_nframes_t nframes, void* data) { Jalv* const host = (Jalv*)data; + host->block_length = nframes; host->buf_size_set = true; #ifdef jack_port_type_get_buffer_size host->midi_buf_size = jack_port_type_get_buffer_size( @@ -648,6 +652,40 @@ jalv_emit_ui_events(Jalv* host) return true; } +static LV2_Buf_Size_Status +jalv_get_sample_count(LV2_Buf_Size_Access_Handle handle, + uint32_t* min, + uint32_t* max, + uint32_t* multiple_of, + uint32_t* power_of) +{ + Jalv* jalv = (Jalv*)handle; + // TODO: Is this actually guaranteed with Jack2? + *min = jalv->block_length; + *max = jalv->block_length; + *multiple_of = 1; + *power_of = 0; + if (!(jalv->block_length & (jalv->block_length - 1))) { + // Block length is a power of 2 + *power_of = 2; + *multiple_of = 2; + } + return 0; +} + +static size_t +jalv_get_buf_size(LV2_Buf_Size_Access_Handle handle, + LV2_URID type, + LV2_URID subtype) +{ + Jalv* jalv = (Jalv*)handle; + if (!jalv->buf_size_set) { + fprintf(stderr, "Buffer size requested but it is not yet known.\n"); + return 0; + } + return 0; +} + static void signal_handler(int ignored) { @@ -660,6 +698,7 @@ main(int argc, char** argv) Jalv host; memset(&host, '\0', sizeof(Jalv)); host.prog_name = argv[0]; + host.block_length = 4096; // Should be set by jack_buffer_size_cb host.midi_buf_size = 1024; // Should be set by jack_buffer_size_cb host.play_state = JALV_PAUSED; @@ -714,6 +753,10 @@ main(int argc, char** argv) LV2_Log_Log log = { &host, jalv_printf, jalv_vprintf }; log_feature.data = &log; + LV2_Buf_Size_Access access = { &host, sizeof(LV2_Buf_Size_Access), + jalv_get_sample_count, jalv_get_buf_size }; + buf_size_feature.data = &access; + zix_sem_init(&exit_sem, 0); host.done = &exit_sem; @@ -841,6 +884,7 @@ main(int argc, char** argv) if (!host.jack_client) die("Failed to connect to JACK.\n"); + host.block_length = jack_get_buffer_size(host.jack_client); #ifdef HAVE_JACK_PORT_TYPE_GET_BUFFER_SIZE host.midi_buf_size = jack_port_type_get_buffer_size( host.jack_client, JACK_DEFAULT_MIDI_TYPE); |