#ifdef HAVE_CONFIG_H #include "config.h" #endif #include <speex/speex.h> #include <stdio.h> #include <stdlib.h> #include <speex/speex_callbacks.h> #ifdef FIXED_DEBUG extern long long spx_mips; #endif #define FRAME_SIZE 160 #include <math.h> int main(int argc, char **argv) { char *inFile, *outFile, *bitsFile; FILE *fin, *fout, *fbits=NULL; short in_short[FRAME_SIZE]; short out_short[FRAME_SIZE]; int snr_frames = 0; char cbits[200]; int nbBits; int i; void *st; void *dec; SpeexBits bits; spx_int32_t tmp; int bitCount=0; spx_int32_t skip_group_delay; SpeexCallback callback; st = speex_encoder_init(speex_lib_get_mode(SPEEX_MODEID_NB)); dec = speex_decoder_init(speex_lib_get_mode(SPEEX_MODEID_NB)); /* BEGIN: You probably don't need the following in a real application */ callback.callback_id = SPEEX_INBAND_CHAR; callback.func = speex_std_char_handler; callback.data = stderr; speex_decoder_ctl(dec, SPEEX_SET_HANDLER, &callback); callback.callback_id = SPEEX_INBAND_MODE_REQUEST; callback.func = speex_std_mode_request_handler; callback.data = st; speex_decoder_ctl(dec, SPEEX_SET_HANDLER, &callback); /* END of unnecessary stuff */ tmp=1; speex_decoder_ctl(dec, SPEEX_SET_ENH, &tmp); tmp=0; speex_encoder_ctl(st, SPEEX_SET_VBR, &tmp); tmp=8; speex_encoder_ctl(st, SPEEX_SET_QUALITY, &tmp); tmp=1; speex_encoder_ctl(st, SPEEX_SET_COMPLEXITY, &tmp); /* Turn this off if you want to measure SNR (on by default) */ tmp=1; speex_encoder_ctl(st, SPEEX_SET_HIGHPASS, &tmp); speex_decoder_ctl(dec, SPEEX_SET_HIGHPASS, &tmp); speex_encoder_ctl(st, SPEEX_GET_LOOKAHEAD, &skip_group_delay); speex_decoder_ctl(dec, SPEEX_GET_LOOKAHEAD, &tmp); skip_group_delay += tmp; if (argc != 4 && argc != 3) { fprintf (stderr, "Usage: encode [in file] [out file] [bits file]\nargc = %d", argc); exit(1); } inFile = argv[1]; fin = fopen(inFile, "rb"); outFile = argv[2]; fout = fopen(outFile, "wb+"); if (argc==4) { bitsFile = argv[3]; fbits = fopen(bitsFile, "wb"); } speex_bits_init(&bits); while (!feof(fin)) { fread(in_short, sizeof(short), FRAME_SIZE, fin); if (feof(fin)) break; speex_bits_reset(&bits); speex_encode_int(st, in_short, &bits); nbBits = speex_bits_write(&bits, cbits, 200); bitCount+=bits.nbBits; if (argc==4) fwrite(cbits, 1, nbBits, fbits); speex_bits_rewind(&bits); speex_decode_int(dec, &bits, out_short); speex_bits_reset(&bits); fwrite(&out_short[skip_group_delay], sizeof(short), FRAME_SIZE-skip_group_delay, fout); skip_group_delay = 0; } fprintf (stderr, "Total encoded size: %d bits\n", bitCount); speex_encoder_destroy(st); speex_decoder_destroy(dec); speex_bits_destroy(&bits); #ifndef DISABLE_FLOAT_API { float sigpow,errpow,snr, seg_snr=0; sigpow = 0; errpow = 0; /* This code just computes SNR, so you don't need it either */ rewind(fin); rewind(fout); while ( FRAME_SIZE == fread(in_short, sizeof(short), FRAME_SIZE, fin) && FRAME_SIZE == fread(out_short, sizeof(short), FRAME_SIZE,fout) ) { float s=0, e=0; for (i=0;i<FRAME_SIZE;++i) { s += (float)in_short[i] * in_short[i]; e += ((float)in_short[i]-out_short[i]) * ((float)in_short[i]-out_short[i]); } seg_snr += 10*log10((s+160)/(e+160)); sigpow += s; errpow += e; snr_frames++; } snr = 10 * log10( sigpow / errpow ); seg_snr /= snr_frames; fprintf(stderr,"SNR = %f\nsegmental SNR = %f\n",snr, seg_snr); #ifdef FIXED_DEBUG printf ("Total: %f MIPS\n", (float)(1e-6*50*spx_mips/snr_frames)); #endif } #endif fclose(fin); fclose(fout); return 0; }