1 #include <speex/speex.h>
2 #include <stdio.h>
3
4 /*The frame size in hardcoded for this sample code but it doesn't have to be*/
5 #define FRAME_SIZE 160
main(int argc,char ** argv)6 int main(int argc, char **argv)
7 {
8 char *inFile;
9 FILE *fin;
10 short in[FRAME_SIZE];
11 float input[FRAME_SIZE];
12 char cbits[200];
13 int nbBytes;
14 /*Holds the state of the encoder*/
15 void *state;
16 /*Holds bits so they can be read and written to by the Speex routines*/
17 SpeexBits bits;
18 int i, tmp;
19
20 /*Create a new encoder state in narrowband mode*/
21 state = speex_encoder_init(&speex_nb_mode);
22
23 /*Set the quality to 8 (15 kbps)*/
24 tmp=8;
25 speex_encoder_ctl(state, SPEEX_SET_QUALITY, &tmp);
26
27 inFile = argv[1];
28 fin = fopen(inFile, "r");
29
30 /*Initialization of the structure that holds the bits*/
31 speex_bits_init(&bits);
32 while (1)
33 {
34 /*Read a 16 bits/sample audio frame*/
35 fread(in, sizeof(short), FRAME_SIZE, fin);
36 if (feof(fin))
37 break;
38 /*Copy the 16 bits values to float so Speex can work on them*/
39 for (i=0;i<FRAME_SIZE;i++)
40 input[i]=in[i];
41
42 /*Flush all the bits in the struct so we can encode a new frame*/
43 speex_bits_reset(&bits);
44
45 /*Encode the frame*/
46 speex_encode(state, input, &bits);
47 /*Copy the bits to an array of char that can be written*/
48 nbBytes = speex_bits_write(&bits, cbits, 200);
49
50 /*Write the size of the frame first. This is what sampledec expects but
51 it's likely to be different in your own application*/
52 fwrite(&nbBytes, sizeof(int), 1, stdout);
53 /*Write the compressed data*/
54 fwrite(cbits, 1, nbBytes, stdout);
55
56 }
57
58 /*Destroy the encoder state*/
59 speex_encoder_destroy(state);
60 /*Destroy the bit-packing struct*/
61 speex_bits_destroy(&bits);
62 fclose(fin);
63 return 0;
64 }
65