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Merge pull request #974 from fredizzimo/remove_malloc_from_sysex

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API Sysex fixes
This commit is contained in:
Jack Humbert 2016-12-30 11:05:50 -05:00 committed by GitHub
commit 2eced29675
4 changed files with 71 additions and 27 deletions
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60
quantum/api/api_sysex.c
View file

@ -1,4 +1,6 @@
#include "api_sysex.h"
#include "sysex_tools.h"
#include "print.h"
void send_bytes_sysex(uint8_t message_type, uint8_t data_type, uint8_t * bytes, uint16_t length) {
// SEND_STRING("\nTX: ");
@ -6,24 +8,50 @@ void send_bytes_sysex(uint8_t message_type, uint8_t data_type, uint8_t * bytes,
// send_byte(bytes[i]);
// SEND_STRING(" ");
// }
uint8_t * precode = malloc(sizeof(uint8_t) * (length + 2));
precode[0] = message_type;
precode[1] = data_type;
memcpy(precode + 2, bytes, length);
uint8_t * encoded = malloc(sizeof(uint8_t) * (sysex_encoded_length(length + 2)));
uint16_t encoded_length = sysex_encode(encoded, precode, length + 2);
uint8_t * array = malloc(sizeof(uint8_t) * (encoded_length + 5));
array[0] = 0xF0;
array[1] = 0x00;
array[2] = 0x00;
array[3] = 0x00;
array[encoded_length + 4] = 0xF7;
memcpy(array + 4, encoded, encoded_length);
midi_send_array(&midi_device, encoded_length + 5, array);
if (length > API_SYSEX_MAX_SIZE) {
xprintf("Sysex msg too big %d %d %d", message_type, data_type, length);
return;
}
// The buffer size required is calculated as the following
// API_SYSEX_MAX_SIZE is the maximum length
// In addition to that we have a two byte message header consisting of the message_type and data_type
// This has to be encoded with an additional overhead of one byte for every starting 7 bytes
// We just add one extra byte in case it's not divisible by 7
// Then we have an unencoded header consisting of 4 bytes
// Plus a one byte terminator
const unsigned message_header = 2;
const unsigned unencoded_message = API_SYSEX_MAX_SIZE + message_header;
const unsigned encoding_overhead = unencoded_message / 7 + 1;
const unsigned encoded_size = unencoded_message + encoding_overhead;
const unsigned unencoded_header = 4;
const unsigned terminator = 1;
const unsigned buffer_size = encoded_size + unencoded_header + terminator;
uint8_t buffer[encoded_size + unencoded_header + terminator];
// The unencoded header
buffer[0] = 0xF0;
buffer[1] = 0x00;
buffer[2] = 0x00;
buffer[3] = 0x00;
// We copy the message to the end of the array, this way we can do an inplace encoding, using the same
// buffer for both input and output
const unsigned message_size = length + message_header;
uint8_t* unencoded_start = buffer + buffer_size - message_size;
uint8_t* ptr = unencoded_start;
*(ptr++) = message_type;
*(ptr++) = data_type;
memcpy(ptr, bytes, length);
unsigned encoded_length = sysex_encode(buffer + unencoded_header, unencoded_start, message_size);
unsigned final_size = unencoded_header + encoded_length + terminator;
buffer[final_size - 1] = 0xF7;
midi_send_array(&midi_device, final_size, buffer);
// SEND_STRING("\nTD: ");
// for (uint8_t i = 0; i < encoded_length + 5; i++) {
// send_byte(array[i]);
// send_byte(buffer[i]);
// SEND_STRING(" ");
// }
}
}

2
quantum/config_common.h
View file

@ -80,4 +80,6 @@
# endif
#endif
#define API_SYSEX_MAX_SIZE 32
#endif

32
tmk_core/protocol/lufa/lufa.c
View file

@ -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
}

4
tmk_core/protocol/lufa/lufa.h
View file

@ -70,7 +70,6 @@ typedef struct {
#ifdef MIDI_ENABLE
void MIDI_Task(void);
MidiDevice midi_device;
#define MIDI_SYSEX_BUFFER 32
#endif
#ifdef API_ENABLE
@ -79,6 +78,9 @@ typedef struct {
#ifdef API_SYSEX_ENABLE
#include "api_sysex.h"
// Allocate space for encoding overhead.
//The header and terminator are not stored to save a few bytes of precious ram
#define MIDI_SYSEX_BUFFER (API_SYSEX_MAX_SIZE + API_SYSEX_MAX_SIZE / 7 + (API_SYSEX_MAX_SIZE % 7 ? 1 : 0))
#endif
// #if LUFA_VERSION_INTEGER < 0x120730