df6f2f9a3c
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13461 a1c6a512-1295-4272-9138-f99709370657
142 lines
3.7 KiB
C
142 lines
3.7 KiB
C
#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <speex/speex.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <speex/speex_callbacks.h>
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#ifdef FIXED_DEBUG
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extern long long spx_mips;
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#endif
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#define FRAME_SIZE 160
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#include <math.h>
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int main(int argc, char **argv)
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{
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char *inFile, *outFile, *bitsFile;
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FILE *fin, *fout, *fbits=NULL;
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short in_short[FRAME_SIZE];
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short out_short[FRAME_SIZE];
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float sigpow,errpow,snr, seg_snr=0;
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int snr_frames = 0;
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char cbits[200];
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int nbBits;
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int i;
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void *st;
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void *dec;
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SpeexBits bits;
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spx_int32_t tmp;
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int bitCount=0;
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spx_int32_t skip_group_delay;
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SpeexCallback callback;
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sigpow = 0;
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errpow = 0;
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st = speex_encoder_init(&speex_nb_mode);
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dec = speex_decoder_init(&speex_nb_mode);
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/* BEGIN: You probably don't need the following in a real application */
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callback.callback_id = SPEEX_INBAND_CHAR;
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callback.func = speex_std_char_handler;
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callback.data = stderr;
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speex_decoder_ctl(dec, SPEEX_SET_HANDLER, &callback);
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callback.callback_id = SPEEX_INBAND_MODE_REQUEST;
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callback.func = speex_std_mode_request_handler;
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callback.data = st;
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speex_decoder_ctl(dec, SPEEX_SET_HANDLER, &callback);
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/* END of unnecessary stuff */
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tmp=1;
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speex_decoder_ctl(dec, SPEEX_SET_ENH, &tmp);
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tmp=0;
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speex_encoder_ctl(st, SPEEX_SET_VBR, &tmp);
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tmp=8;
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speex_encoder_ctl(st, SPEEX_SET_QUALITY, &tmp);
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tmp=1;
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speex_encoder_ctl(st, SPEEX_SET_COMPLEXITY, &tmp);
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/* Turn this off if you want to measure SNR (on by default) */
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tmp=1;
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speex_encoder_ctl(st, SPEEX_SET_HIGHPASS, &tmp);
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speex_decoder_ctl(dec, SPEEX_SET_HIGHPASS, &tmp);
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speex_encoder_ctl(st, SPEEX_GET_LOOKAHEAD, &skip_group_delay);
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speex_decoder_ctl(dec, SPEEX_GET_LOOKAHEAD, &tmp);
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skip_group_delay += tmp;
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if (argc != 4 && argc != 3)
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{
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fprintf (stderr, "Usage: encode [in file] [out file] [bits file]\nargc = %d", argc);
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exit(1);
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}
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inFile = argv[1];
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fin = fopen(inFile, "r");
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outFile = argv[2];
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fout = fopen(outFile, "w+");
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if (argc==4)
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{
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bitsFile = argv[3];
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fbits = fopen(bitsFile, "w");
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}
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speex_bits_init(&bits);
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while (!feof(fin))
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{
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fread(in_short, sizeof(short), FRAME_SIZE, fin);
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if (feof(fin))
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break;
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speex_bits_reset(&bits);
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speex_encode_int(st, in_short, &bits);
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nbBits = speex_bits_write(&bits, cbits, 200);
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bitCount+=bits.nbBits;
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if (argc==4)
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fwrite(cbits, 1, nbBits, fbits);
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speex_bits_rewind(&bits);
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speex_decode_int(dec, &bits, out_short);
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speex_bits_reset(&bits);
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fwrite(&out_short[skip_group_delay], sizeof(short), FRAME_SIZE-skip_group_delay, fout);
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skip_group_delay = 0;
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}
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fprintf (stderr, "Total encoded size: %d bits\n", bitCount);
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speex_encoder_destroy(st);
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speex_decoder_destroy(dec);
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speex_bits_destroy(&bits);
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/* This code just computes SNR, so you don't need it either */
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rewind(fin);
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rewind(fout);
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while ( FRAME_SIZE == fread(in_short, sizeof(short), FRAME_SIZE, fin)
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&&
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FRAME_SIZE == fread(out_short, sizeof(short), FRAME_SIZE,fout) )
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{
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float s=0, e=0;
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for (i=0;i<FRAME_SIZE;++i) {
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s += (float)in_short[i] * in_short[i];
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e += ((float)in_short[i]-out_short[i]) * ((float)in_short[i]-out_short[i]);
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}
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seg_snr += 10*log10((s+160)/(e+160));
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sigpow += s;
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errpow += e;
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snr_frames++;
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}
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fclose(fin);
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fclose(fout);
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snr = 10 * log10( sigpow / errpow );
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seg_snr /= snr_frames;
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fprintf(stderr,"SNR = %f\nsegmental SNR = %f\n",snr, seg_snr);
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#ifdef FIXED_DEBUG
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printf ("Total: %f MIPS\n", (float)(1e-6*50*spx_mips/snr_frames));
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#endif
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return 0;
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}
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