static void test_compress(
FILE* outFp,
FILE* inpFp,
size_t messageMaxBytes,
size_t ringBufferBytes)
{
LZ4_stream_t* const lz4Stream = LZ4_createStream();
const size_t cmpBufBytes = LZ4_COMPRESSBOUND(messageMaxBytes);
char* const cmpBuf = (char*) malloc(cmpBufBytes);
char* const inpBuf = (char*) malloc(ringBufferBytes);
int inpOffset = 0;
for ( ; ; )
{
char* const inpPtr = &inpBuf[inpOffset];
#if 0
// Read random length data to the ring buffer.
const int randomLength = (rand() % messageMaxBytes) + 1;
const int inpBytes = (int) read_bin(inpFp, inpPtr, randomLength);
if (0 == inpBytes) break;
#else
// Read line to the ring buffer.
int inpBytes = 0;
if (!fgets(inpPtr, (int) messageMaxBytes, inpFp))
break;
inpBytes = (int) strlen(inpPtr);
#endif
{
const int cmpBytes = LZ4_compress_fast_continue(
lz4Stream, inpPtr, cmpBuf, inpBytes, cmpBufBytes, 1);
if (cmpBytes <= 0) break;
write_uint16(outFp, (uint16_t) cmpBytes);
write_bin(outFp, cmpBuf, cmpBytes);
// Add and wraparound the ringbuffer offset
inpOffset += inpBytes;
if ((size_t)inpOffset >= ringBufferBytes - messageMaxBytes) inpOffset = 0;
}
}
write_uint16(outFp, 0);
free(inpBuf);
free(cmpBuf);
LZ4_freeStream(lz4Stream);
}
void save_thread_func(void * lpParam){
char line_buffer[128];
char * cmp_frame_buff ;
IplImage * dummy_image ;
int i = 0 ;
unsigned long timestamp ;
FILE *seqFile;
cmp_frame_buff = malloc(LZ4_MESSAGE_MAX_BYTES);
if(cmp_frame_buff == NULL) printf("Cannot allocate sequence output file");
sprintf(path, "%s/sequence.lz4", path_base);
seqFile = fopen(path, "wb");
//start LZ4 compression
LZ4_stream_t* const lz4Stream = LZ4_createStream();
const size_t cmpBufBytes = LZ4_COMPRESSBOUND(LZ4_MESSAGE_MAX_BYTES);
char* const cmpBuf = (char*) malloc(cmpBufBytes);
dummy_image = cvCreateImage(cvSize(640, 480), IPL_DEPTH_8U, 1);
printf("Start Save ! \n");
while(thread_alive || my_frame_buffer.nb_frames_availables > 0){
if(my_frame_buffer.nb_frames_availables > 0){
if(pop_frame(dummy_image, ×tamp, &my_frame_buffer) >= 0){
memcpy(cmp_frame_buff, ×tamp, sizeof(unsigned long));
memcpy((cmp_frame_buff + sizeof(unsigned long)), dummy_image->imageData, 640*480);
const int cmpBytes = LZ4_compress_continue(lz4Stream, cmp_frame_buff, cmpBuf, MESSAGE_MAX_BYTES);
if (cmpBytes <= 0){
printf("Compression failed \n");
break;
}
fwrite(cmpBuf, 1, cmpBytes, seqFile);
i ++ ;
}
}
usleep(WRITE_DELAY_US);
}
free(cmp_frame_buff);
LZ4_freeStream(lz4Stream);
fclose(seqFile);
printf("End Save \n");
}
int lz4_encode(Lz4EncoderContext *lz4, int height, int stride, uint8_t *io_ptr,
unsigned int num_io_bytes, int top_down, uint8_t format)
{
Lz4Encoder *enc = (Lz4Encoder *)lz4;
uint8_t *lines;
int num_lines = 0;
int total_lines = 0;
int in_size, enc_size, out_size, already_copied;
uint8_t *in_buf, *compressed_lines;
uint8_t *out_buf = io_ptr;
LZ4_stream_t *stream = LZ4_createStream();
// Encode direction and format
*(out_buf++) = top_down ? 1 : 0;
*(out_buf++) = format;
num_io_bytes -= 2;
out_size = 2;
do {
num_lines = enc->usr->more_lines(enc->usr, &lines);
if (num_lines <= 0) {
spice_error("more lines failed");
LZ4_freeStream(stream);
return 0;
}
in_buf = lines;
in_size = stride * num_lines;
lines += in_size;
int bound_size = LZ4_compressBound(in_size);
compressed_lines = (uint8_t *) malloc(bound_size + 4);
#ifdef HAVE_LZ4_COMPRESS_FAST_CONTINUE
enc_size = LZ4_compress_fast_continue(stream, (const char *) in_buf,
(char *) compressed_lines + 4, in_size,
bound_size, 1);
#else
enc_size = LZ4_compress_continue(stream, (const char *) in_buf,
(char *) compressed_lines + 4, in_size);
#endif
if (enc_size <= 0) {
spice_error("compress failed!");
free(compressed_lines);
LZ4_freeStream(stream);
return 0;
}
*((uint32_t *)compressed_lines) = htonl(enc_size);
out_size += enc_size += 4;
already_copied = 0;
while (num_io_bytes < enc_size) {
memcpy(out_buf, compressed_lines + already_copied, num_io_bytes);
already_copied += num_io_bytes;
enc_size -= num_io_bytes;
num_io_bytes = enc->usr->more_space(enc->usr, &io_ptr);
if (num_io_bytes <= 0) {
spice_error("more space failed");
free(compressed_lines);
LZ4_freeStream(stream);
return 0;
}
out_buf = io_ptr;
}
memcpy(out_buf, compressed_lines + already_copied, enc_size);
out_buf += enc_size;
num_io_bytes -= enc_size;
free(compressed_lines);
total_lines += num_lines;
} while (total_lines < height);
LZ4_freeStream(stream);
if (total_lines != height) {
spice_error("too many lines\n");
out_size = 0;
}
return out_size;
}