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API Sysex fixes

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Fix memory leaks by using stack instead of malloc
Reduce memory usage by having less temporary bufffers
Remove warnings by adding includes
Decrease code size by 608 bytes (mostly due to not linking malloc)
More robust handling of buffer overflows
This commit is contained in:
Fred Sundvik 2016-12-29 12:13:30 +02:00
parent 273faa4d9c
commit dd685eceb2
4 changed files with 71 additions and 27 deletions
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32
tmk_core/protocol/lufa/lufa.c
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@ -1252,28 +1252,40 @@ void cc_callback(MidiDevice * device,
// midi_send_cc(device, (chan + 1) % 16, num, val);
}
#ifdef API_SYSEX_ENABLE
uint8_t midi_buffer[MIDI_SYSEX_BUFFER] = {0};
#endif
void sysex_callback(MidiDevice * device, uint16_t start, uint8_t length, uint8_t * data) {
#ifdef API_SYSEX_ENABLE
// SEND_STRING("\n");
// send_word(start);
// SEND_STRING(": ");
// Don't store the header
int16_t pos = start - 4;
for (uint8_t place = 0; place < length; place++) {
// send_byte(*data);
midi_buffer[start + place] = *data;
if (*data == 0xF7) {
// SEND_STRING("\nRD: ");
// for (uint8_t i = 0; i < start + place + 1; i++){
// send_byte(midi_buffer[i]);
// SEND_STRING(" ");
// }
uint8_t * decoded = malloc(sizeof(uint8_t) * (sysex_decoded_length(start + place - 4)));
uint16_t decode_length = sysex_decode(decoded, midi_buffer + 4, start + place - 4);
process_api(decode_length, decoded);
if (pos >= 0) {
if (*data == 0xF7) {
// SEND_STRING("\nRD: ");
// for (uint8_t i = 0; i < start + place + 1; i++){
// send_byte(midi_buffer[i]);
// SEND_STRING(" ");
// }
const unsigned decoded_length = sysex_decoded_length(pos);
uint8_t decoded[API_SYSEX_MAX_SIZE];
sysex_decode(decoded, midi_buffer, pos);
process_api(decoded_length, decoded);
return;
}
else if (pos >= MIDI_SYSEX_BUFFER) {
return;
}
midi_buffer[pos] = *data;
}
// SEND_STRING(" ");
data++;
pos++;
}
#endif
}