21 #include "JackError.h"
22 #include "JackPortType.h"
23 #include "JackMidiPort.h"
30 SERVER_EXPORT
void JackMidiBuffer::Reset(jack_nframes_t nframes)
33 this->nframes = nframes;
39 SERVER_EXPORT jack_shmsize_t JackMidiBuffer::MaxEventSize()
const
41 assert (((jack_shmsize_t) - 1) < 0);
42 jack_shmsize_t left = buffer_size - (
sizeof(JackMidiBuffer) +
sizeof(JackMidiEvent) * (event_count + 1) +
write_pos);
46 if (left <= JackMidiEvent::INLINE_SIZE_MAX) {
47 return JackMidiEvent::INLINE_SIZE_MAX;
52 SERVER_EXPORT jack_midi_data_t* JackMidiBuffer::ReserveEvent(jack_nframes_t time, jack_shmsize_t size)
54 jack_shmsize_t space = MaxEventSize();
55 if (space == 0 || size > space) {
56 jack_error(
"JackMidiBuffer::ReserveEvent - the buffer does not have "
57 "enough room to enqueue a %lu byte event", size);
61 JackMidiEvent*
event = &events[event_count++];
65 if (size <= JackMidiEvent::INLINE_SIZE_MAX) {
71 return (jack_midi_data_t*)
this +
event->offset;
74 void MidiBufferInit(
void* buffer,
size_t buffer_size, jack_nframes_t nframes)
76 JackMidiBuffer* midi = (JackMidiBuffer*)buffer;
77 midi->magic = JackMidiBuffer::MAGIC;
79 midi->buffer_size = BUFFER_SIZE_MAX *
sizeof(jack_default_audio_sample_t);
93 static void MidiBufferMixdown(
void* mixbuffer,
void** src_buffers,
int src_count, jack_nframes_t nframes)
95 JackMidiBuffer* mix = static_cast<JackMidiBuffer*>(mixbuffer);
96 if (!mix->IsValid()) {
97 jack_error(
"Jack::MidiBufferMixdown - invalid mix buffer");
102 uint32_t mix_index[src_count];
104 for (
int i = 0; i < src_count; ++i) {
105 JackMidiBuffer* buf = static_cast<JackMidiBuffer*>(src_buffers[i]);
106 if (!buf->IsValid()) {
107 jack_error(
"Jack::MidiBufferMixdown - invalid source buffer");
111 event_count += buf->event_count;
112 mix->lost_events += buf->lost_events;
116 for (events_done = 0; events_done < event_count; ++events_done) {
117 JackMidiBuffer* next_buf = 0;
118 JackMidiEvent* next_event = 0;
119 uint32_t next_buf_index = 0;
122 for (
int i = 0; i < src_count; ++i) {
123 JackMidiBuffer* buf = static_cast<JackMidiBuffer*>(src_buffers[i]);
124 if (mix_index[i] >= buf->event_count)
126 JackMidiEvent* e = &buf->events[mix_index[i]];
127 if (!next_event || e->time < next_event->time) {
133 assert(next_event != 0);
136 jack_midi_data_t* dest = mix->ReserveEvent(next_event->time, next_event->size);
139 memcpy(dest, next_event->GetData(next_buf), next_event->size);
140 mix_index[next_buf_index]++;
142 mix->lost_events += event_count - events_done;
145 static size_t MidiBufferSize()
147 return BUFFER_SIZE_MAX *
sizeof(jack_default_audio_sample_t);
150 const JackPortType gMidiPortType =
152 JACK_DEFAULT_MIDI_TYPE,