65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
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#include <speex/speex.h>
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#include <stdio.h>
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/*The frame size in hardcoded for this sample code but it doesn't have to be*/
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#define FRAME_SIZE 160
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int main(int argc, char **argv)
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{
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char *inFile;
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FILE *fin;
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short in[FRAME_SIZE];
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float input[FRAME_SIZE];
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char cbits[200];
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int nbBytes;
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/*Holds the state of the encoder*/
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void *state;
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/*Holds bits so they can be read and written to by the Speex routines*/
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SpeexBits bits;
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int i, tmp;
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/*Create a new encoder state in narrowband mode*/
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state = speex_encoder_init(&speex_nb_mode);
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/*Set the quality to 8 (15 kbps)*/
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tmp=8;
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speex_encoder_ctl(state, SPEEX_SET_QUALITY, &tmp);
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inFile = argv[1];
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fin = fopen(inFile, "r");
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/*Initialization of the structure that holds the bits*/
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speex_bits_init(&bits);
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while (1)
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{
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/*Read a 16 bits/sample audio frame*/
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fread(in, sizeof(short), FRAME_SIZE, fin);
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if (feof(fin))
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break;
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/*Copy the 16 bits values to float so Speex can work on them*/
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for (i=0;i<FRAME_SIZE;i++)
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input[i]=in[i];
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/*Flush all the bits in the struct so we can encode a new frame*/
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speex_bits_reset(&bits);
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/*Encode the frame*/
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speex_encode(state, input, &bits);
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/*Copy the bits to an array of char that can be written*/
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nbBytes = speex_bits_write(&bits, cbits, 200);
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/*Write the size of the frame first. This is what sampledec expects but
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it's likely to be different in your own application*/
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fwrite(&nbBytes, sizeof(int), 1, stdout);
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/*Write the compressed data*/
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fwrite(cbits, 1, nbBytes, stdout);
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}
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/*Destroy the encoder state*/
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speex_encoder_destroy(state);
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/*Destroy the bit-packing struct*/
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speex_bits_destroy(&bits);
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fclose(fin);
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return 0;
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}
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