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 *outFile;
9 FILE *fout;
10 /*Holds the audio that will be written to file (16 bits per sample)*/
11 short out[FRAME_SIZE];
12 /*Speex handle samples as float, so we need an array of floats*/
13 float output[FRAME_SIZE];
14 char cbits[200];
15 int nbBytes;
16 /*Holds the state of the decoder*/
17 void *state;
18 /*Holds bits so they can be read and written to by the Speex routines*/
19 SpeexBits bits;
20 int i, tmp;
21
22 /*Create a new decoder state in narrowband mode*/
23 state = speex_decoder_init(&speex_nb_mode);
24
25 /*Set the perceptual enhancement on*/
26 tmp=1;
27 speex_decoder_ctl(state, SPEEX_SET_ENH, &tmp);
28
29 outFile = argv[1];
30 fout = fopen(outFile, "w");
31
32 /*Initialization of the structure that holds the bits*/
33 speex_bits_init(&bits);
34 while (1)
35 {
36 /*Read the size encoded by sampleenc, this part will likely be
37 different in your application*/
38 fread(&nbBytes, sizeof(int), 1, stdin);
39 fprintf (stderr, "nbBytes: %d\n", nbBytes);
40 if (feof(stdin))
41 break;
42
43 /*Read the "packet" encoded by sampleenc*/
44 fread(cbits, 1, nbBytes, stdin);
45 /*Copy the data into the bit-stream struct*/
46 speex_bits_read_from(&bits, cbits, nbBytes);
47
48 /*Decode the data*/
49 speex_decode(state, &bits, output);
50
51 /*Copy from float to short (16 bits) for output*/
52 for (i=0;i<FRAME_SIZE;i++)
53 out[i]=output[i];
54
55 /*Write the decoded audio to file*/
56 fwrite(out, sizeof(short), FRAME_SIZE, fout);
57 }
58
59 /*Destroy the decoder state*/
60 speex_decoder_destroy(state);
61 /*Destroy the bit-stream truct*/
62 speex_bits_destroy(&bits);
63 fclose(fout);
64 return 0;
65 }
66