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Marlin Binary Protocol Mark II (#14817)

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This commit is contained in:
Chris Pepper 2019-08-06 02:41:53 +01:00 committed by Scott Lahteine
parent 5bc2fb022c
commit f499cecf0d
9 changed files with 1026 additions and 256 deletions
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36
Marlin/src/feature/binary_protocol.cpp Normal file
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@ -0,0 +1,36 @@
/**
* Marlin 3D Printer Firmware
* Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "../inc/MarlinConfigPre.h"
#if ENABLED(BINARY_FILE_TRANSFER)
#include "../sd/cardreader.h"
#include "binary_protocol.h"
char* SDFileTransferProtocol::Packet::Open::data = nullptr;
size_t SDFileTransferProtocol::data_waiting, SDFileTransferProtocol::transfer_timeout, SDFileTransferProtocol::idle_timeout;
bool SDFileTransferProtocol::transfer_active, SDFileTransferProtocol::dummy_transfer, SDFileTransferProtocol::compression;
BinaryStream binaryStream[NUM_SERIAL];
#endif // BINARY_FILE_TRANSFER

471
Marlin/src/feature/binary_protocol.h Normal file
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@ -0,0 +1,471 @@
/**
* Marlin 3D Printer Firmware
* Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#pragma once
#include "../inc/MarlinConfig.h"
#define BINARY_STREAM_COMPRESSION
#if ENABLED(BINARY_STREAM_COMPRESSION)
#include "../libs/heatshrink/heatshrink_decoder.h"
#endif
inline bool bs_serial_data_available(const uint8_t index) {
switch (index) {
case 0: return MYSERIAL0.available();
#if NUM_SERIAL > 1
case 1: return MYSERIAL1.available();
#endif
}
return false;
}
inline int bs_read_serial(const uint8_t index) {
switch (index) {
case 0: return MYSERIAL0.read();
#if NUM_SERIAL > 1
case 1: return MYSERIAL1.read();
#endif
}
return -1;
}
#if ENABLED(BINARY_STREAM_COMPRESSION)
static heatshrink_decoder hsd;
static uint8_t decode_buffer[512] = {};
#endif
class SDFileTransferProtocol {
private:
struct Packet {
struct [[gnu::packed]] Open {
static bool validate(char* buffer, size_t length) {
return (length > sizeof(Open) && buffer[length - 1] == '\0');
}
static Open& decode(char* buffer) {
data = &buffer[2];
return *reinterpret_cast<Open*>(buffer);
}
bool compression_enabled() { return compression & 0x1; }
bool dummy_transfer() { return dummy & 0x1; }
static char* filename() { return data; }
private:
uint8_t dummy, compression;
static char* data; // variable length strings complicate things
};
};
static bool file_open(char* filename) {
if (!dummy_transfer) {
card.initsd();
card.openFile(filename, false);
if (!card.isFileOpen()) return false;
}
transfer_active = true;
data_waiting = 0;
#if ENABLED(BINARY_STREAM_COMPRESSION)
heatshrink_decoder_reset(&hsd);
#endif
return true;
}
static bool file_write(char* buffer, const size_t length) {
#if ENABLED(BINARY_STREAM_COMPRESSION)
if (compression) {
size_t total_processed = 0, processed_count = 0;
HSD_poll_res presult;
while (total_processed < length) {
heatshrink_decoder_sink(&hsd, reinterpret_cast<uint8_t*>(&buffer[total_processed]), length - total_processed, &processed_count);
total_processed += processed_count;
do {
presult = heatshrink_decoder_poll(&hsd, &decode_buffer[data_waiting], sizeof(decode_buffer) - data_waiting, &processed_count);
data_waiting += processed_count;
if (data_waiting == sizeof(decode_buffer)) {
if (!dummy_transfer)
if (card.write(decode_buffer, data_waiting) < 0) {
return false;
}
data_waiting = 0;
}
} while (presult == HSDR_POLL_MORE);
}
return true;
}
#endif
return (dummy_transfer || card.write(buffer, length) >= 0);
}
static bool file_close() {
if (!dummy_transfer) {
#if ENABLED(BINARY_STREAM_COMPRESSION)
// flush any buffered data
if (data_waiting) {
if (card.write(decode_buffer, data_waiting) < 0) return false;
data_waiting = 0;
}
#endif
card.closefile();
card.release();
}
#if ENABLED(BINARY_STREAM_COMPRESSION)
heatshrink_decoder_finish(&hsd);
#endif
transfer_active = false;
return true;
}
static void transfer_abort() {
if (!dummy_transfer) {
card.closefile();
card.removeFile(card.filename);
card.release();
#if ENABLED(BINARY_STREAM_COMPRESSION)
heatshrink_decoder_finish(&hsd);
#endif
}
transfer_active = false;
return;
}
enum class FileTransfer : uint8_t { QUERY, OPEN, CLOSE, WRITE, ABORT };
static size_t data_waiting, transfer_timeout, idle_timeout;
static bool transfer_active, dummy_transfer, compression;
public:
static void idle() {
// If a transfer is interrupted and a file is left open, abort it after TIMEOUT ms
const millis_t ms = millis();
if (transfer_active && ELAPSED(ms, idle_timeout)) {
idle_timeout = ms + IDLE_PERIOD;
if (ELAPSED(ms, transfer_timeout)) transfer_abort();
}
}
static void process(uint8_t packet_type, char* buffer, const uint16_t length) {
transfer_timeout = millis() + TIMEOUT;
switch (static_cast<FileTransfer>(packet_type)) {
case FileTransfer::QUERY:
SERIAL_ECHOPAIR("PFT:version:", VERSION_MAJOR, ".", VERSION_MINOR, ".", VERSION_PATCH);
#if ENABLED(BINARY_STREAM_COMPRESSION)
SERIAL_ECHOLNPAIR(":compresion:heatshrink,", HEATSHRINK_STATIC_WINDOW_BITS, ",", HEATSHRINK_STATIC_LOOKAHEAD_BITS);
#else
SERIAL_ECHOLNPGM(":compresion:none");
#endif
break;
case FileTransfer::OPEN:
if (transfer_active)
SERIAL_ECHOLNPGM("PFT:busy");
else {
if (Packet::Open::validate(buffer, length)) {
auto packet = Packet::Open::decode(buffer);
compression = packet.compression_enabled();
dummy_transfer = packet.dummy_transfer();
if (file_open(packet.filename())) {
SERIAL_ECHOLNPGM("PFT:success");
break;
}
}
SERIAL_ECHOLNPGM("PFT:fail");
}
break;
case FileTransfer::CLOSE:
if (transfer_active) {
if (file_close())
SERIAL_ECHOLNPGM("PFT:success");
else
SERIAL_ECHOLNPGM("PFT:ioerror");
}
else SERIAL_ECHOLNPGM("PFT:invalid");
break;
case FileTransfer::WRITE:
if (!transfer_active)
SERIAL_ECHOLNPGM("PFT:invalid");
else if (!file_write(buffer, length))
SERIAL_ECHOLNPGM("PFT:ioerror");
break;
case FileTransfer::ABORT:
transfer_abort();
SERIAL_ECHOLNPGM("PFT:success");
break;
default:
SERIAL_ECHOLNPGM("PTF:invalid");
break;
}
}
static const uint16_t VERSION_MAJOR = 0, VERSION_MINOR = 1, VERSION_PATCH = 0, TIMEOUT = 10000, IDLE_PERIOD = 1000;
};
class BinaryStream {
public:
enum class Protocol : uint8_t { CONTROL, FILE_TRANSFER };
enum class ProtocolControl : uint8_t { SYNC = 1, CLOSE };
enum class StreamState : uint8_t { PACKET_RESET, PACKET_WAIT, PACKET_HEADER, PACKET_DATA, PACKET_FOOTER,
PACKET_PROCESS, PACKET_RESEND, PACKET_TIMEOUT, PACKET_ERROR };
struct Packet { // 10 byte protocol overhead, ascii with checksum and line number has a minimum of 7 increasing with line
struct [[gnu::packed]] Header {
static constexpr uint16_t HEADER_TOKEN = 0xB5AD;
uint16_t token; // packet start token
uint8_t sync; // stream sync, resend id and packet loss detection
uint8_t meta; // 4 bit protocol,
// 4 bit packet type
uint16_t size; // data length
uint16_t checksum; // header checksum
uint8_t protocol() { return (meta >> 4) & 0xF; }
uint8_t type() { return meta & 0xF; }
void reset() { token = 0; sync = 0; meta = 0; size = 0; checksum = 0; }
};
struct [[gnu::packed]] Footer {
uint16_t checksum; // full packet checksum
void reset() { checksum = 0; }
};
uint8_t header_data[sizeof(Header)],
footer_data[sizeof(Footer)];
uint32_t bytes_received;
uint16_t checksum, header_checksum;
millis_t timeout;
char* buffer;
Header& header() { return *reinterpret_cast<Header*>(header_data); }
Footer& footer() { return *reinterpret_cast<Footer*>(footer_data); }
void reset() {
header().reset();
footer().reset();
bytes_received = 0;
checksum = 0;
header_checksum = 0;
timeout = millis() + PACKET_MAX_WAIT;
buffer = nullptr;
}
} packet{};
void reset() {
sync = 0;
packet_retries = 0;
buffer_next_index = 0;
}
// fletchers 16 checksum
uint32_t checksum(uint32_t cs, uint8_t value) {
uint16_t cs_low = (((cs & 0xFF) + value) % 255);
return ((((cs >> 8) + cs_low) % 255) << 8) | cs_low;
}
// read the next byte from the data stream keeping track of
// whether the stream times out from data starvation
// takes the data variable by reference in order to return status
bool stream_read(uint8_t& data) {
if (stream_state != StreamState::PACKET_WAIT && ELAPSED(millis(), packet.timeout)) {
stream_state = StreamState::PACKET_TIMEOUT;
return false;
}
if (!bs_serial_data_available(card.transfer_port_index)) return false;
data = bs_read_serial(card.transfer_port_index);
packet.timeout = millis() + PACKET_MAX_WAIT;
return true;
}
template<const size_t buffer_size>
void receive(char (&buffer)[buffer_size]) {
uint8_t data = 0;
millis_t transfer_window = millis() + RX_TIMESLICE;
#if ENABLED(SDSUPPORT)
PORT_REDIRECT(card.transfer_port_index);
#endif
while (PENDING(millis(), transfer_window)) {
switch (stream_state) {
/**
* Data stream packet handling
*/
case StreamState::PACKET_RESET:
packet.reset();
stream_state = StreamState::PACKET_WAIT;
case StreamState::PACKET_WAIT:
if (!stream_read(data)) { idle(); return; } // no active packet so don't wait
packet.header_data[1] = data;
if (packet.header().token == Packet::Header::HEADER_TOKEN) {
packet.bytes_received = 2;
stream_state = StreamState::PACKET_HEADER;
}
else {
// stream corruption drop data
packet.header_data[0] = data;
}
break;
case StreamState::PACKET_HEADER:
if (!stream_read(data)) break;
packet.header_data[packet.bytes_received++] = data;
packet.checksum = checksum(packet.checksum, data);
// header checksum calculation can't contain the checksum
if (packet.bytes_received == sizeof(Packet::Header) - 2)
packet.header_checksum = packet.checksum;
if (packet.bytes_received == sizeof(Packet::Header)) {
if (packet.header().checksum == packet.header_checksum) {
// The SYNC control packet is a special case in that it doesn't require the stream sync to be correct
if (static_cast<Protocol>(packet.header().protocol()) == Protocol::CONTROL && static_cast<ProtocolControl>(packet.header().type()) == ProtocolControl::SYNC) {
SERIAL_ECHOLNPAIR("ss", sync, ",", buffer_size, ",", VERSION_MAJOR, ".", VERSION_MINOR, ".", VERSION_PATCH);
stream_state = StreamState::PACKET_RESET;
break;
}
if (packet.header().sync == sync) {
buffer_next_index = 0;
packet.bytes_received = 0;
if (packet.header().size) {
stream_state = StreamState::PACKET_DATA;
packet.buffer = static_cast<char *>(&buffer[0]); // multipacket buffering not implemented, always allocate whole buffer to packet
}
else
stream_state = StreamState::PACKET_PROCESS;
}
else if (packet.header().sync == sync - 1) { // ok response must have been lost
SERIAL_ECHOLNPAIR("ok", packet.header().sync); // transmit valid packet received and drop the payload
stream_state = StreamState::PACKET_RESET;
}
else if (packet_retries) {
stream_state = StreamState::PACKET_RESET; // could be packets already buffered on flow controlled connections, drop them without ack
}
else {
SERIAL_ECHO_MSG("Datastream packet out of order");
stream_state = StreamState::PACKET_RESEND;
}
}
else {
SERIAL_ECHO_START();
SERIAL_ECHOLNPAIR("Packet Header(", packet.header().sync, "?) Corrupt");
stream_state = StreamState::PACKET_RESEND;
}
}
break;
case StreamState::PACKET_DATA:
if (!stream_read(data)) break;
if (buffer_next_index < buffer_size)
packet.buffer[buffer_next_index] = data;
else {
SERIAL_ECHO_MSG("Datastream packet data buffer overrun");
stream_state = StreamState::PACKET_ERROR;
break;
}
packet.checksum = checksum(packet.checksum, data);
packet.bytes_received++;
buffer_next_index++;
if (packet.bytes_received == packet.header().size) {
stream_state = StreamState::PACKET_FOOTER;
packet.bytes_received = 0;
}
break;
case StreamState::PACKET_FOOTER:
if (!stream_read(data)) break;
packet.footer_data[packet.bytes_received++] = data;
if (packet.bytes_received == sizeof(Packet::Footer)) {
if (packet.footer().checksum == packet.checksum) {
stream_state = StreamState::PACKET_PROCESS;
}
else {
SERIAL_ECHO_START();
SERIAL_ECHOLNPAIR("Packet(", packet.header().sync, ") Payload Corrupt");
stream_state = StreamState::PACKET_RESEND;
}
}
break;
case StreamState::PACKET_PROCESS:
sync++;
packet_retries = 0;
bytes_received += packet.header().size;
SERIAL_ECHOLNPAIR("ok", packet.header().sync); // transmit valid packet received
dispatch();
stream_state = StreamState::PACKET_RESET;
break;
case StreamState::PACKET_RESEND:
if (packet_retries < MAX_RETRIES || MAX_RETRIES == 0) {
packet_retries++;
stream_state = StreamState::PACKET_RESET;
SERIAL_ECHO_START();
SERIAL_ECHOLNPAIR("Resend request ", int(packet_retries));
SERIAL_ECHOLNPAIR("rs", sync);
}
else
stream_state = StreamState::PACKET_ERROR;
break;
case StreamState::PACKET_TIMEOUT:
SERIAL_ECHO_MSG("Datastream timeout");
stream_state = StreamState::PACKET_RESEND;
break;
case StreamState::PACKET_ERROR:
SERIAL_ECHOLNPAIR("fe", packet.header().sync);
reset(); // reset everything, resync required
stream_state = StreamState::PACKET_RESET;
break;
}
}
}
void dispatch() {
switch(static_cast<Protocol>(packet.header().protocol())) {
case Protocol::CONTROL:
switch(static_cast<ProtocolControl>(packet.header().type())) {
case ProtocolControl::CLOSE: // revert back to ASCII mode
card.flag.binary_mode = false;
break;
default:
SERIAL_ECHO_MSG("Unknown BinaryProtocolControl Packet");
}
break;
case Protocol::FILE_TRANSFER:
SDFileTransferProtocol::process(packet.header().type(), packet.buffer, packet.header().size); // send user data to be processed
break;
default:
SERIAL_ECHO_MSG("Unsupported Binary Protocol");
}
}
void idle() {
// Some Protocols may need periodic updates without new data
SDFileTransferProtocol::idle();
}
static const uint16_t PACKET_MAX_WAIT = 500, RX_TIMESLICE = 20, MAX_RETRIES = 0, VERSION_MAJOR = 0, VERSION_MINOR = 1, VERSION_PATCH = 0;
uint8_t packet_retries, sync;
uint16_t buffer_next_index;
uint32_t bytes_received;
StreamState stream_state = StreamState::PACKET_RESET;
};
extern BinaryStream binaryStream[NUM_SERIAL];

259
Marlin/src/gcode/queue.cpp
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@ -39,6 +39,11 @@ GCodeQueue queue;
#include "../feature/leds/printer_event_leds.h" #include "../feature/leds/printer_event_leds.h"
#endif #endif
#if ENABLED(BINARY_FILE_TRANSFER)
#include "../feature/binary_protocol.h"
#endif
/** /**
* GCode line number handling. Hosts may opt to include line numbers when * GCode line number handling. Hosts may opt to include line numbers when
* sending commands to Marlin, and lines will be checked for sequentiality. * sending commands to Marlin, and lines will be checked for sequentiality.
@ -285,256 +290,6 @@ inline int read_serial(const uint8_t index) {
} }
} }
#if ENABLED(BINARY_FILE_TRANSFER)
inline bool serial_data_available(const uint8_t index) {
switch (index) {
case 0: return MYSERIAL0.available();
#if NUM_SERIAL > 1
case 1: return MYSERIAL1.available();
#endif
default: return false;
}
}
class BinaryStream {
public:
enum class StreamState : uint8_t {
STREAM_RESET,
PACKET_RESET,
STREAM_HEADER,
PACKET_HEADER,
PACKET_DATA,
PACKET_VALIDATE,
PACKET_RESEND,
PACKET_FLUSHRX,
PACKET_TIMEOUT,
STREAM_COMPLETE,
STREAM_FAILED,
};
#pragma pack(push, 1)
struct StreamHeader {
uint16_t token;
uint32_t filesize;
};
union {
uint8_t stream_header_bytes[sizeof(StreamHeader)];
StreamHeader stream_header;
};
struct Packet {
struct Header {
uint32_t id;
uint16_t size, checksum;
};
union {
uint8_t header_bytes[sizeof(Header)];
Header header;
};
uint32_t bytes_received;
uint16_t checksum;
millis_t timeout;
} packet{};
#pragma pack(pop)
void packet_reset() {
packet.header.id = 0;
packet.header.size = 0;
packet.header.checksum = 0;
packet.bytes_received = 0;
packet.checksum = 0x53A2;
packet.timeout = millis() + STREAM_MAX_WAIT;
}
void stream_reset() {
packets_received = 0;
bytes_received = 0;
packet_retries = 0;
buffer_next_index = 0;
stream_header.token = 0;
stream_header.filesize = 0;
}
uint32_t checksum(uint32_t seed, uint8_t value) {
return ((seed ^ value) ^ (seed << 8)) & 0xFFFF;
}
// read the next byte from the data stream keeping track of
// whether the stream times out from data starvation
// takes the data variable by reference in order to return status
bool stream_read(uint8_t& data) {
if (ELAPSED(millis(), packet.timeout)) {
stream_state = StreamState::PACKET_TIMEOUT;
return false;
}
if (!serial_data_available(card.transfer_port_index)) return false;
data = read_serial(card.transfer_port_index);
packet.timeout = millis() + STREAM_MAX_WAIT;
return true;
}
template<const size_t buffer_size>
void receive(char (&buffer)[buffer_size]) {
uint8_t data = 0;
millis_t transfer_timeout = millis() + RX_TIMESLICE;
#if ENABLED(SDSUPPORT)
PORT_REDIRECT(card.transfer_port_index);
#endif
while (PENDING(millis(), transfer_timeout)) {
switch (stream_state) {
case StreamState::STREAM_RESET:
stream_reset();
case StreamState::PACKET_RESET:
packet_reset();
stream_state = StreamState::PACKET_HEADER;
break;
case StreamState::STREAM_HEADER: // The filename could also be in this packet, rather than handling it in the gcode
for (size_t i = 0; i < sizeof(stream_header); ++i)
stream_header_bytes[i] = buffer[i];
if (stream_header.token == 0x1234) {
stream_state = StreamState::PACKET_RESET;
bytes_received = 0;
time_stream_start = millis();
// confirm active stream and the maximum block size supported
SERIAL_ECHO_START();
SERIAL_ECHOLNPAIR("Datastream initialized (", stream_header.filesize, " bytes expected)");
SERIAL_ECHOLNPAIR("so", buffer_size);
}
else {
SERIAL_ECHO_MSG("Datastream init error (invalid token)");
stream_state = StreamState::STREAM_FAILED;
}
buffer_next_index = 0;
break;
case StreamState::PACKET_HEADER:
if (!stream_read(data)) break;
packet.header_bytes[packet.bytes_received++] = data;
if (packet.bytes_received == sizeof(Packet::Header)) {
if (packet.header.id == packets_received) {
buffer_next_index = 0;
packet.bytes_received = 0;
stream_state = StreamState::PACKET_DATA;
}
else {
SERIAL_ECHO_MSG("Datastream packet out of order");
stream_state = StreamState::PACKET_FLUSHRX;
}
}
break;
case StreamState::PACKET_DATA:
if (!stream_read(data)) break;
if (buffer_next_index < buffer_size)
buffer[buffer_next_index] = data;
else {
SERIAL_ECHO_MSG("Datastream packet data buffer overrun");
stream_state = StreamState::STREAM_FAILED;
break;
}
packet.checksum = checksum(packet.checksum, data);
packet.bytes_received++;
buffer_next_index++;
if (packet.bytes_received == packet.header.size)
stream_state = StreamState::PACKET_VALIDATE;
break;
case StreamState::PACKET_VALIDATE:
if (packet.header.checksum == packet.checksum) {
packet_retries = 0;
packets_received++;
bytes_received += packet.header.size;
if (packet.header.id == 0) // id 0 is always the stream descriptor
stream_state = StreamState::STREAM_HEADER; // defer packet confirmation to STREAM_HEADER state
else {
if (bytes_received < stream_header.filesize) {
stream_state = StreamState::PACKET_RESET; // reset and receive next packet
SERIAL_ECHOLNPAIR("ok", packet.header.id); // transmit confirm packet received and valid token
}
else
stream_state = StreamState::STREAM_COMPLETE; // no more data required
if (card.write(buffer, buffer_next_index) < 0) {
stream_state = StreamState::STREAM_FAILED;
SERIAL_ECHO_MSG("SDCard IO Error");
break;
};
}
}
else {
SERIAL_ECHO_START();
SERIAL_ECHOLNPAIR("Block(", packet.header.id, ") Corrupt");
stream_state = StreamState::PACKET_FLUSHRX;
}
break;
case StreamState::PACKET_RESEND:
if (packet_retries < MAX_RETRIES) {
packet_retries++;
stream_state = StreamState::PACKET_RESET;
SERIAL_ECHO_START();
SERIAL_ECHOLNPAIR("Resend request ", int(packet_retries));
SERIAL_ECHOLNPAIR("rs", packet.header.id); // transmit resend packet token
}
else {
stream_state = StreamState::STREAM_FAILED;
}
break;
case StreamState::PACKET_FLUSHRX:
if (ELAPSED(millis(), packet.timeout)) {
stream_state = StreamState::PACKET_RESEND;
break;
}
if (!serial_data_available(card.transfer_port_index)) break;
read_serial(card.transfer_port_index); // throw away data
packet.timeout = millis() + STREAM_MAX_WAIT;
break;
case StreamState::PACKET_TIMEOUT:
SERIAL_ECHO_START();
SERIAL_ECHOLNPGM("Datastream timeout");
stream_state = StreamState::PACKET_RESEND;
break;
case StreamState::STREAM_COMPLETE:
stream_state = StreamState::STREAM_RESET;
card.flag.binary_mode = false;
SERIAL_ECHO_START();
SERIAL_ECHO(card.filename);
SERIAL_ECHOLNPAIR(" transfer completed @ ", ((bytes_received / (millis() - time_stream_start) * 1000) / 1024), "KiB/s");
SERIAL_ECHOLNPGM("sc"); // transmit stream complete token
card.closefile();
return;
case StreamState::STREAM_FAILED:
stream_state = StreamState::STREAM_RESET;
card.flag.binary_mode = false;
card.closefile();
card.removeFile(card.filename);
SERIAL_ECHO_START();
SERIAL_ECHOLNPGM("File transfer failed");
SERIAL_ECHOLNPGM("sf"); // transmit stream failed token
return;
}
}
}
static const uint16_t STREAM_MAX_WAIT = 500, RX_TIMESLICE = 20, MAX_RETRIES = 3;
uint8_t packet_retries;
uint16_t buffer_next_index;
uint32_t packets_received, bytes_received;
millis_t time_stream_start;
StreamState stream_state = StreamState::STREAM_RESET;
} binaryStream{};
#endif // BINARY_FILE_TRANSFER
void GCodeQueue::gcode_line_error(PGM_P const err, const int8_t port) { void GCodeQueue::gcode_line_error(PGM_P const err, const int8_t port) {
PORT_REDIRECT(port); PORT_REDIRECT(port);
SERIAL_ERROR_START(); SERIAL_ERROR_START();
@ -564,13 +319,13 @@ void GCodeQueue::get_serial_commands() {
; ;
#if ENABLED(BINARY_FILE_TRANSFER) #if ENABLED(BINARY_FILE_TRANSFER)
if (card.flag.saving && card.flag.binary_mode) { if (card.flag.binary_mode) {
/** /**
* For binary stream file transfer, use serial_line_buffer as the working * For binary stream file transfer, use serial_line_buffer as the working
* receive buffer (which limits the packet size to MAX_CMD_SIZE). * receive buffer (which limits the packet size to MAX_CMD_SIZE).
* The receive buffer also limits the packet size for reliable transmission. * The receive buffer also limits the packet size for reliable transmission.
*/ */
binaryStream.receive(serial_line_buffer[card.transfer_port_index]); binaryStream[card.transfer_port_index].receive(serial_line_buffer[card.transfer_port_index]);
return; return;
} }
#endif #endif

5
Marlin/src/gcode/sdcard/M28_M29.cpp
View File

@ -48,10 +48,7 @@ void GcodeSuite::M28() {
// Binary transfer mode // Binary transfer mode
if ((card.flag.binary_mode = binary_mode)) { if ((card.flag.binary_mode = binary_mode)) {
SERIAL_ECHO_START(); SERIAL_ECHO_MSG("Switching to Binary Protocol");
SERIAL_ECHO(" preparing to receive: ");
SERIAL_ECHOLN(p);
card.openFile(p, false);
#if NUM_SERIAL > 1 #if NUM_SERIAL > 1
card.transfer_port_index = queue.port[queue.index_r]; card.transfer_port_index = queue.port[queue.index_r];
#endif #endif

14
Marlin/src/libs/heatshrink/LICENSE Normal file
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@ -0,0 +1,14 @@
Copyright (c) 2013-2015, Scott Vokes <vokes.s@gmail.com>
All rights reserved.
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.
THE 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.

20
Marlin/src/libs/heatshrink/heatshrink_common.h Normal file
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@ -0,0 +1,20 @@
/**
* libs/heatshrink/heatshrink_common.h
*/
#pragma once
#define HEATSHRINK_AUTHOR "Scott Vokes <vokes.s@gmail.com>"
#define HEATSHRINK_URL "https://github.com/atomicobject/heatshrink"
/* Version 0.4.1 */
#define HEATSHRINK_VERSION_MAJOR 0
#define HEATSHRINK_VERSION_MINOR 4
#define HEATSHRINK_VERSION_PATCH 1
#define HEATSHRINK_MIN_WINDOW_BITS 4
#define HEATSHRINK_MAX_WINDOW_BITS 15
#define HEATSHRINK_MIN_LOOKAHEAD_BITS 3
#define HEATSHRINK_LITERAL_MARKER 0x01
#define HEATSHRINK_BACKREF_MARKER 0x00

26
Marlin/src/libs/heatshrink/heatshrink_config.h Normal file
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@ -0,0 +1,26 @@
/**
* libs/heatshrink/heatshrink_config.h
*/
#pragma once
// Should functionality assuming dynamic allocation be used?
#ifndef HEATSHRINK_DYNAMIC_ALLOC
//#define HEATSHRINK_DYNAMIC_ALLOC 1
#endif
#if HEATSHRINK_DYNAMIC_ALLOC
// Optional replacement of malloc/free
#define HEATSHRINK_MALLOC(SZ) malloc(SZ)
#define HEATSHRINK_FREE(P, SZ) free(P)
#else
// Required parameters for static configuration
#define HEATSHRINK_STATIC_INPUT_BUFFER_SIZE 32
#define HEATSHRINK_STATIC_WINDOW_BITS 8
#define HEATSHRINK_STATIC_LOOKAHEAD_BITS 4
#endif
// Turn on logging for debugging
#define HEATSHRINK_DEBUGGING_LOGS 0
// Use indexing for faster compression. (This requires additional space.)
#define HEATSHRINK_USE_INDEX 1

355
Marlin/src/libs/heatshrink/heatshrink_decoder.cpp Normal file
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@ -0,0 +1,355 @@
/**
* libs/heatshrink/heatshrink_decoder.cpp
*/
#include <stdlib.h>
#include <string.h>
#include "heatshrink_decoder.h"
#pragma GCC optimize ("O3")
/* States for the polling state machine. */
typedef enum {
HSDS_TAG_BIT, /* tag bit */
HSDS_YIELD_LITERAL, /* ready to yield literal byte */
HSDS_BACKREF_INDEX_MSB, /* most significant byte of index */
HSDS_BACKREF_INDEX_LSB, /* least significant byte of index */
HSDS_BACKREF_COUNT_MSB, /* most significant byte of count */
HSDS_BACKREF_COUNT_LSB, /* least significant byte of count */
HSDS_YIELD_BACKREF /* ready to yield back-reference */
} HSD_state;
#if HEATSHRINK_DEBUGGING_LOGS
#include <stdio.h>
#include <ctype.h>
#include <assert.h>
#define LOG(...) fprintf(stderr, __VA_ARGS__)
#define ASSERT(X) assert(X)
static const char *state_names[] = {
"tag_bit",
"yield_literal",
"backref_index_msb",
"backref_index_lsb",
"backref_count_msb",
"backref_count_lsb",
"yield_backref"
};
#else
#define LOG(...) /* no-op */
#define ASSERT(X) /* no-op */
#endif
typedef struct {
uint8_t *buf; /* output buffer */
size_t buf_size; /* buffer size */
size_t *output_size; /* bytes pushed to buffer, so far */
} output_info;
#define NO_BITS ((uint16_t)-1)
/* Forward references. */
static uint16_t get_bits(heatshrink_decoder *hsd, uint8_t count);
static void push_byte(heatshrink_decoder *hsd, output_info *oi, uint8_t byte);
#if HEATSHRINK_DYNAMIC_ALLOC
heatshrink_decoder *heatshrink_decoder_alloc(uint16_t input_buffer_size, uint8_t window_sz2, uint8_t lookahead_sz2) {
if ((window_sz2 < HEATSHRINK_MIN_WINDOW_BITS) ||
(window_sz2 > HEATSHRINK_MAX_WINDOW_BITS) ||
(input_buffer_size == 0) ||
(lookahead_sz2 < HEATSHRINK_MIN_LOOKAHEAD_BITS) ||
(lookahead_sz2 >= window_sz2)) {
return nullptr;
}
size_t buffers_sz = (1 << window_sz2) + input_buffer_size;
size_t sz = sizeof(heatshrink_decoder) + buffers_sz;
heatshrink_decoder *hsd = HEATSHRINK_MALLOC(sz);
if (hsd == nullptr) return nullptr;
hsd->input_buffer_size = input_buffer_size;
hsd->window_sz2 = window_sz2;
hsd->lookahead_sz2 = lookahead_sz2;
heatshrink_decoder_reset(hsd);
LOG("-- allocated decoder with buffer size of %zu (%zu + %u + %u)\n",
sz, sizeof(heatshrink_decoder), (1 << window_sz2), input_buffer_size);
return hsd;
}
void heatshrink_decoder_free(heatshrink_decoder *hsd) {
size_t buffers_sz = (1 << hsd->window_sz2) + hsd->input_buffer_size;
size_t sz = sizeof(heatshrink_decoder) + buffers_sz;
HEATSHRINK_FREE(hsd, sz);
(void)sz; /* may not be used by free */
}
#endif
void heatshrink_decoder_reset(heatshrink_decoder *hsd) {
size_t buf_sz = 1 << HEATSHRINK_DECODER_WINDOW_BITS(hsd);
size_t input_sz = HEATSHRINK_DECODER_INPUT_BUFFER_SIZE(hsd);
memset(hsd->buffers, 0, buf_sz + input_sz);
hsd->state = HSDS_TAG_BIT;
hsd->input_size = 0;
hsd->input_index = 0;
hsd->bit_index = 0x00;
hsd->current_byte = 0x00;
hsd->output_count = 0;
hsd->output_index = 0;
hsd->head_index = 0;
}
/* Copy SIZE bytes into the decoder's input buffer, if it will fit. */
HSD_sink_res heatshrink_decoder_sink(heatshrink_decoder *hsd,
uint8_t *in_buf, size_t size, size_t *input_size) {
if (hsd == nullptr || in_buf == nullptr || input_size == nullptr)
return HSDR_SINK_ERROR_NULL;
size_t rem = HEATSHRINK_DECODER_INPUT_BUFFER_SIZE(hsd) - hsd->input_size;
if (rem == 0) {
*input_size = 0;
return HSDR_SINK_FULL;
}
size = rem < size ? rem : size;
LOG("-- sinking %zd bytes\n", size);
/* copy into input buffer (at head of buffers) */
memcpy(&hsd->buffers[hsd->input_size], in_buf, size);
hsd->input_size += size;
*input_size = size;
return HSDR_SINK_OK;
}
/*****************
* Decompression *
*****************/
#define BACKREF_COUNT_BITS(HSD) (HEATSHRINK_DECODER_LOOKAHEAD_BITS(HSD))
#define BACKREF_INDEX_BITS(HSD) (HEATSHRINK_DECODER_WINDOW_BITS(HSD))
// States
static HSD_state st_tag_bit(heatshrink_decoder *hsd);
static HSD_state st_yield_literal(heatshrink_decoder *hsd, output_info *oi);
static HSD_state st_backref_index_msb(heatshrink_decoder *hsd);
static HSD_state st_backref_index_lsb(heatshrink_decoder *hsd);
static HSD_state st_backref_count_msb(heatshrink_decoder *hsd);
static HSD_state st_backref_count_lsb(heatshrink_decoder *hsd);
static HSD_state st_yield_backref(heatshrink_decoder *hsd, output_info *oi);
HSD_poll_res heatshrink_decoder_poll(heatshrink_decoder *hsd, uint8_t *out_buf, size_t out_buf_size, size_t *output_size) {
if (hsd == nullptr || out_buf == nullptr || output_size == nullptr)
return HSDR_POLL_ERROR_NULL;
*output_size = 0;
output_info oi;
oi.buf = out_buf;
oi.buf_size = out_buf_size;
oi.output_size = output_size;
while (1) {
LOG("-- poll, state is %d (%s), input_size %d\n", hsd->state, state_names[hsd->state], hsd->input_size);
uint8_t in_state = hsd->state;
switch (in_state) {
case HSDS_TAG_BIT:
hsd->state = st_tag_bit(hsd);
break;
case HSDS_YIELD_LITERAL:
hsd->state = st_yield_literal(hsd, &oi);
break;
case HSDS_BACKREF_INDEX_MSB:
hsd->state = st_backref_index_msb(hsd);
break;
case HSDS_BACKREF_INDEX_LSB:
hsd->state = st_backref_index_lsb(hsd);
break;
case HSDS_BACKREF_COUNT_MSB:
hsd->state = st_backref_count_msb(hsd);
break;
case HSDS_BACKREF_COUNT_LSB:
hsd->state = st_backref_count_lsb(hsd);
break;
case HSDS_YIELD_BACKREF:
hsd->state = st_yield_backref(hsd, &oi);
break;
default:
return HSDR_POLL_ERROR_UNKNOWN;
}
// If the current state cannot advance, check if input or output
// buffer are exhausted.
if (hsd->state == in_state)
return (*output_size == out_buf_size) ? HSDR_POLL_MORE : HSDR_POLL_EMPTY;
}
}
static HSD_state st_tag_bit(heatshrink_decoder *hsd) {
uint32_t bits = get_bits(hsd, 1); // get tag bit
if (bits == NO_BITS)
return HSDS_TAG_BIT;
else if (bits)
return HSDS_YIELD_LITERAL;
else if (HEATSHRINK_DECODER_WINDOW_BITS(hsd) > 8)
return HSDS_BACKREF_INDEX_MSB;
else {
hsd->output_index = 0;
return HSDS_BACKREF_INDEX_LSB;
}
}
static HSD_state st_yield_literal(heatshrink_decoder *hsd, output_info *oi) {
/* Emit a repeated section from the window buffer, and add it (again)
* to the window buffer. (Note that the repetition can include
* itself.)*/
if (*oi->output_size < oi->buf_size) {
uint16_t byte = get_bits(hsd, 8);
if (byte == NO_BITS) { return HSDS_YIELD_LITERAL; } /* out of input */
uint8_t *buf = &hsd->buffers[HEATSHRINK_DECODER_INPUT_BUFFER_SIZE(hsd)];
uint16_t mask = (1 << HEATSHRINK_DECODER_WINDOW_BITS(hsd)) - 1;
uint8_t c = byte & 0xFF;
LOG("-- emitting literal byte 0x%02x ('%c')\n", c, isprint(c) ? c : '.');
buf[hsd->head_index++ & mask] = c;
push_byte(hsd, oi, c);
return HSDS_TAG_BIT;
}
return HSDS_YIELD_LITERAL;
}
static HSD_state st_backref_index_msb(heatshrink_decoder *hsd) {
uint8_t bit_ct = BACKREF_INDEX_BITS(hsd);
ASSERT(bit_ct > 8);
uint16_t bits = get_bits(hsd, bit_ct - 8);
LOG("-- backref index (msb), got 0x%04x (+1)\n", bits);
if (bits == NO_BITS) { return HSDS_BACKREF_INDEX_MSB; }
hsd->output_index = bits << 8;
return HSDS_BACKREF_INDEX_LSB;
}
static HSD_state st_backref_index_lsb(heatshrink_decoder *hsd) {
uint8_t bit_ct = BACKREF_INDEX_BITS(hsd);
uint16_t bits = get_bits(hsd, bit_ct < 8 ? bit_ct : 8);
LOG("-- backref index (lsb), got 0x%04x (+1)\n", bits);
if (bits == NO_BITS) { return HSDS_BACKREF_INDEX_LSB; }
hsd->output_index |= bits;
hsd->output_index++;
uint8_t br_bit_ct = BACKREF_COUNT_BITS(hsd);
hsd->output_count = 0;
return (br_bit_ct > 8) ? HSDS_BACKREF_COUNT_MSB : HSDS_BACKREF_COUNT_LSB;
}
static HSD_state st_backref_count_msb(heatshrink_decoder *hsd) {
uint8_t br_bit_ct = BACKREF_COUNT_BITS(hsd);
ASSERT(br_bit_ct > 8);
uint16_t bits = get_bits(hsd, br_bit_ct - 8);
LOG("-- backref count (msb), got 0x%04x (+1)\n", bits);
if (bits == NO_BITS) { return HSDS_BACKREF_COUNT_MSB; }
hsd->output_count = bits << 8;
return HSDS_BACKREF_COUNT_LSB;
}
static HSD_state st_backref_count_lsb(heatshrink_decoder *hsd) {
uint8_t br_bit_ct = BACKREF_COUNT_BITS(hsd);
uint16_t bits = get_bits(hsd, br_bit_ct < 8 ? br_bit_ct : 8);
LOG("-- backref count (lsb), got 0x%04x (+1)\n", bits);
if (bits == NO_BITS) { return HSDS_BACKREF_COUNT_LSB; }
hsd->output_count |= bits;
hsd->output_count++;
return HSDS_YIELD_BACKREF;
}
static HSD_state st_yield_backref(heatshrink_decoder *hsd, output_info *oi) {
size_t count = oi->buf_size - *oi->output_size;
if (count > 0) {
size_t i = 0;
if (hsd->output_count < count) count = hsd->output_count;
uint8_t *buf = &hsd->buffers[HEATSHRINK_DECODER_INPUT_BUFFER_SIZE(hsd)];
uint16_t mask = (1 << HEATSHRINK_DECODER_WINDOW_BITS(hsd)) - 1;
uint16_t neg_offset = hsd->output_index;
LOG("-- emitting %zu bytes from -%u bytes back\n", count, neg_offset);
ASSERT(neg_offset <= mask + 1);
ASSERT(count <= (size_t)(1 << BACKREF_COUNT_BITS(hsd)));
for (i = 0; i < count; i++) {
uint8_t c = buf[(hsd->head_index - neg_offset) & mask];
push_byte(hsd, oi, c);
buf[hsd->head_index & mask] = c;
hsd->head_index++;
LOG(" -- ++ 0x%02x\n", c);
}
hsd->output_count -= count;
if (hsd->output_count == 0) { return HSDS_TAG_BIT; }
}
return HSDS_YIELD_BACKREF;
}
/* Get the next COUNT bits from the input buffer, saving incremental progress.
* Returns NO_BITS on end of input, or if more than 15 bits are requested. */
static uint16_t get_bits(heatshrink_decoder *hsd, uint8_t count) {
uint16_t accumulator = 0;
int i = 0;
if (count > 15) return NO_BITS;
LOG("-- popping %u bit(s)\n", count);
/* If we aren't able to get COUNT bits, suspend immediately, because we
* don't track how many bits of COUNT we've accumulated before suspend. */
if (hsd->input_size == 0 && hsd->bit_index < (1 << (count - 1))) return NO_BITS;
for (i = 0; i < count; i++) {
if (hsd->bit_index == 0x00) {
if (hsd->input_size == 0) {
LOG(" -- out of bits, suspending w/ accumulator of %u (0x%02x)\n", accumulator, accumulator);
return NO_BITS;
}
hsd->current_byte = hsd->buffers[hsd->input_index++];
LOG(" -- pulled byte 0x%02x\n", hsd->current_byte);
if (hsd->input_index == hsd->input_size) {
hsd->input_index = 0; /* input is exhausted */
hsd->input_size = 0;
}
hsd->bit_index = 0x80;
}
accumulator <<= 1;
if (hsd->current_byte & hsd->bit_index) {
accumulator |= 0x01;
if (0) {
LOG(" -- got 1, accumulator 0x%04x, bit_index 0x%02x\n",
accumulator, hsd->bit_index);
}
}
else if (0) {
LOG(" -- got 0, accumulator 0x%04x, bit_index 0x%02x\n",
accumulator, hsd->bit_index);
}
hsd->bit_index >>= 1;
}
if (count > 1) LOG(" -- accumulated %08x\n", accumulator);
return accumulator;
}
HSD_finish_res heatshrink_decoder_finish(heatshrink_decoder *hsd) {
if (hsd == nullptr) { return HSDR_FINISH_ERROR_NULL; }
switch (hsd->state) {
case HSDS_TAG_BIT:
return hsd->input_size == 0 ? HSDR_FINISH_DONE : HSDR_FINISH_MORE;
/* If we want to finish with no input, but are in these states, it's
* because the 0-bit padding to the last byte looks like a backref
* marker bit followed by all 0s for index and count bits. */
case HSDS_BACKREF_INDEX_LSB:
case HSDS_BACKREF_INDEX_MSB:
case HSDS_BACKREF_COUNT_LSB:
case HSDS_BACKREF_COUNT_MSB:
return hsd->input_size == 0 ? HSDR_FINISH_DONE : HSDR_FINISH_MORE;
/* If the output stream is padded with 0xFFs (possibly due to being in
* flash memory), also explicitly check the input size rather than
* uselessly returning MORE but yielding 0 bytes when polling. */
case HSDS_YIELD_LITERAL:
return hsd->input_size == 0 ? HSDR_FINISH_DONE : HSDR_FINISH_MORE;
default: return HSDR_FINISH_MORE;
}
}
static void push_byte(heatshrink_decoder *hsd, output_info *oi, uint8_t byte) {
LOG(" -- pushing byte: 0x%02x ('%c')\n", byte, isprint(byte) ? byte : '.');
oi->buf[(*oi->output_size)++] = byte;
(void)hsd;
}

96
Marlin/src/libs/heatshrink/heatshrink_decoder.h Normal file
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@ -0,0 +1,96 @@
/**
* libs/heatshrink/heatshrink_decoder.h
*/
#pragma once
#include <stdint.h>
#include <stddef.h>
#include "heatshrink_common.h"
#include "heatshrink_config.h"
typedef enum {
HSDR_SINK_OK, /* data sunk, ready to poll */
HSDR_SINK_FULL, /* out of space in internal buffer */
HSDR_SINK_ERROR_NULL=-1, /* NULL argument */
} HSD_sink_res;
typedef enum {
HSDR_POLL_EMPTY, /* input exhausted */
HSDR_POLL_MORE, /* more data remaining, call again w/ fresh output buffer */
HSDR_POLL_ERROR_NULL=-1, /* NULL arguments */
HSDR_POLL_ERROR_UNKNOWN=-2,
} HSD_poll_res;
typedef enum {
HSDR_FINISH_DONE, /* output is done */
HSDR_FINISH_MORE, /* more output remains */
HSDR_FINISH_ERROR_NULL=-1, /* NULL arguments */
} HSD_finish_res;
#if HEATSHRINK_DYNAMIC_ALLOC
#define HEATSHRINK_DECODER_INPUT_BUFFER_SIZE(BUF) \
((BUF)->input_buffer_size)
#define HEATSHRINK_DECODER_WINDOW_BITS(BUF) \
((BUF)->window_sz2)
#define HEATSHRINK_DECODER_LOOKAHEAD_BITS(BUF) \
((BUF)->lookahead_sz2)
#else
#define HEATSHRINK_DECODER_INPUT_BUFFER_SIZE(_) \
HEATSHRINK_STATIC_INPUT_BUFFER_SIZE
#define HEATSHRINK_DECODER_WINDOW_BITS(_) \
(HEATSHRINK_STATIC_WINDOW_BITS)
#define HEATSHRINK_DECODER_LOOKAHEAD_BITS(BUF) \
(HEATSHRINK_STATIC_LOOKAHEAD_BITS)
#endif
typedef struct {
uint16_t input_size; /* bytes in input buffer */
uint16_t input_index; /* offset to next unprocessed input byte */
uint16_t output_count; /* how many bytes to output */
uint16_t output_index; /* index for bytes to output */
uint16_t head_index; /* head of window buffer */
uint8_t state; /* current state machine node */
uint8_t current_byte; /* current byte of input */
uint8_t bit_index; /* current bit index */
#if HEATSHRINK_DYNAMIC_ALLOC
/* Fields that are only used if dynamically allocated. */
uint8_t window_sz2; /* window buffer bits */
uint8_t lookahead_sz2; /* lookahead bits */
uint16_t input_buffer_size; /* input buffer size */
/* Input buffer, then expansion window buffer */
uint8_t buffers[];
#else
/* Input buffer, then expansion window buffer */
uint8_t buffers[(1 << HEATSHRINK_DECODER_WINDOW_BITS(_)) + HEATSHRINK_DECODER_INPUT_BUFFER_SIZE(_)];
#endif
} heatshrink_decoder;
#if HEATSHRINK_DYNAMIC_ALLOC
/* Allocate a decoder with an input buffer of INPUT_BUFFER_SIZE bytes,
* an expansion buffer size of 2^WINDOW_SZ2, and a lookahead
* size of 2^lookahead_sz2. (The window buffer and lookahead sizes
* must match the settings used when the data was compressed.)
* Returns NULL on error. */
heatshrink_decoder *heatshrink_decoder_alloc(uint16_t input_buffer_size, uint8_t expansion_buffer_sz2, uint8_t lookahead_sz2);
/* Free a decoder. */
void heatshrink_decoder_free(heatshrink_decoder *hsd);
#endif
/* Reset a decoder. */
void heatshrink_decoder_reset(heatshrink_decoder *hsd);
/* Sink at most SIZE bytes from IN_BUF into the decoder. *INPUT_SIZE is set to
* indicate how many bytes were actually sunk (in case a buffer was filled). */
HSD_sink_res heatshrink_decoder_sink(heatshrink_decoder *hsd, uint8_t *in_buf, size_t size, size_t *input_size);
/* Poll for output from the decoder, copying at most OUT_BUF_SIZE bytes into
* OUT_BUF (setting *OUTPUT_SIZE to the actual amount copied). */
HSD_poll_res heatshrink_decoder_poll(heatshrink_decoder *hsd, uint8_t *out_buf, size_t out_buf_size, size_t *output_size);
/* Notify the dencoder that the input stream is finished.
* If the return value is HSDR_FINISH_MORE, there is still more output, so
* call heatshrink_decoder_poll and repeat. */
HSD_finish_res heatshrink_decoder_finish(heatshrink_decoder *hsd);