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- /*
- Copyright (C) 2014 Francesc Alted
- http://blosc.org
- License: MIT (see LICENSE.txt)
- Example program demonstrating use of the Blosc filter from C code.
- To compile this program:
- $ gcc simple.c -o simple -lblosc
- or, if you don't have the blosc library installed:
- $ gcc -O3 -msse2 simple.c -I../blosc -o simple -L../build/blosc
- Using MSVC on Windows:
- $ cl /arch:SSE2 /Ox /Fesimple.exe /Iblosc examples\simple.c blosc\blosc.c blosc\blosclz.c blosc\shuffle.c blosc\shuffle-sse2.c blosc\shuffle-generic.c blosc\bitshuffle-generic.c blosc\bitshuffle-sse2.c
- To run:
- $ ./simple
- Blosc version info: 1.4.2.dev ($Date:: 2014-07-08 #$)
- Compression: 4000000 -> 158494 (25.2x)
- Decompression succesful!
- Succesful roundtrip!
- */
- #include <stdio.h>
- #include <blosc.h>
- #define SIZE 100*100*100
- int main(){
- static float data[SIZE];
- static float data_out[SIZE];
- static float data_dest[SIZE];
- int isize = SIZE*sizeof(float), osize = SIZE*sizeof(float);
- int dsize = SIZE*sizeof(float), csize;
- int i;
- for(i=0; i<SIZE; i++){
- data[i] = i;
- }
- /* Register the filter with the library */
- printf("Blosc version info: %s (%s)\n",
- BLOSC_VERSION_STRING, BLOSC_VERSION_DATE);
- /* Initialize the Blosc compressor */
- blosc_init();
- /* Compress with clevel=5 and shuffle active */
- csize = blosc_compress(5, 1, sizeof(float), isize, data, data_out, osize);
- if (csize == 0) {
- printf("Buffer is uncompressible. Giving up.\n");
- return 1;
- }
- else if (csize < 0) {
- printf("Compression error. Error code: %d\n", csize);
- return csize;
- }
- printf("Compression: %d -> %d (%.1fx)\n", isize, csize, (1.*isize) / csize);
- /* Decompress */
- dsize = blosc_decompress(data_out, data_dest, dsize);
- if (dsize < 0) {
- printf("Decompression error. Error code: %d\n", dsize);
- return dsize;
- }
- printf("Decompression succesful!\n");
- /* After using it, destroy the Blosc environment */
- blosc_destroy();
- for(i=0;i<SIZE;i++){
- if(data[i] != data_dest[i]) {
- printf("Decompressed data differs from original!\n");
- return -1;
- }
- }
- printf("Succesful roundtrip!\n");
- return 0;
- }
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