Esempio n. 1
0
int main(int argc, char **argv)
{
    FFTComplex *tab, *tab1, *tab_ref;
    FFTSample *tab2;
    int it, i, c;
    int do_speed = 0;
    int err = 1;
    enum tf_transform transform = TRANSFORM_FFT;
    int do_inverse = 0;
    FFTContext s1, *s = &s1;
    FFTContext m1, *m = &m1;
    RDFTContext r1, *r = &r1;
    DCTContext d1, *d = &d1;
    int fft_nbits, fft_size, fft_size_2;
    double scale = 1.0;
    AVLFG prng;
    av_lfg_init(&prng, 1);

    fft_nbits = 9;
    for(;;) {
        c = getopt(argc, argv, "hsimrdn:f:");
        if (c == -1)
            break;
        switch(c) {
        case 'h':
            help();
            break;
        case 's':
            do_speed = 1;
            break;
        case 'i':
            do_inverse = 1;
            break;
        case 'm':
            transform = TRANSFORM_MDCT;
            break;
        case 'r':
            transform = TRANSFORM_RDFT;
            break;
        case 'd':
            transform = TRANSFORM_DCT;
            break;
        case 'n':
            fft_nbits = atoi(optarg);
            break;
        case 'f':
            scale = atof(optarg);
            break;
        }
    }

    fft_size = 1 << fft_nbits;
    fft_size_2 = fft_size >> 1;
    tab = av_malloc(fft_size * sizeof(FFTComplex));
    tab1 = av_malloc(fft_size * sizeof(FFTComplex));
    tab_ref = av_malloc(fft_size * sizeof(FFTComplex));
    tab2 = av_malloc(fft_size * sizeof(FFTSample));

    switch (transform) {
    case TRANSFORM_MDCT:
        av_log(NULL, AV_LOG_INFO,"Scale factor is set to %f\n", scale);
        if (do_inverse)
            av_log(NULL, AV_LOG_INFO,"IMDCT");
        else
            av_log(NULL, AV_LOG_INFO,"MDCT");
        ff_mdct_init(m, fft_nbits, do_inverse, scale);
        break;
    case TRANSFORM_FFT:
        if (do_inverse)
            av_log(NULL, AV_LOG_INFO,"IFFT");
        else
            av_log(NULL, AV_LOG_INFO,"FFT");
        ff_fft_init(s, fft_nbits, do_inverse);
        fft_ref_init(fft_nbits, do_inverse);
        break;
    case TRANSFORM_RDFT:
        if (do_inverse)
            av_log(NULL, AV_LOG_INFO,"IDFT_C2R");
        else
            av_log(NULL, AV_LOG_INFO,"DFT_R2C");
        ff_rdft_init(r, fft_nbits, do_inverse ? IDFT_C2R : DFT_R2C);
        fft_ref_init(fft_nbits, do_inverse);
        break;
    case TRANSFORM_DCT:
        if (do_inverse)
            av_log(NULL, AV_LOG_INFO,"DCT_III");
        else
            av_log(NULL, AV_LOG_INFO,"DCT_II");
        ff_dct_init(d, fft_nbits, do_inverse ? DCT_III : DCT_II);
        break;
    }
    av_log(NULL, AV_LOG_INFO," %d test\n", fft_size);

    /* generate random data */

    for (i = 0; i < fft_size; i++) {
        tab1[i].re = frandom(&prng);
        tab1[i].im = frandom(&prng);
    }

    /* checking result */
    av_log(NULL, AV_LOG_INFO,"Checking...\n");

    switch (transform) {
    case TRANSFORM_MDCT:
        if (do_inverse) {
            imdct_ref((float *)tab_ref, (float *)tab1, fft_nbits);
            ff_imdct_calc(m, tab2, (float *)tab1);
            err = check_diff((float *)tab_ref, tab2, fft_size, scale);
        } else {
            mdct_ref((float *)tab_ref, (float *)tab1, fft_nbits);

            ff_mdct_calc(m, tab2, (float *)tab1);

            err = check_diff((float *)tab_ref, tab2, fft_size / 2, scale);
        }
        break;
    case TRANSFORM_FFT:
        memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
        ff_fft_permute(s, tab);
        ff_fft_calc(s, tab);

        fft_ref(tab_ref, tab1, fft_nbits);
        err = check_diff((float *)tab_ref, (float *)tab, fft_size * 2, 1.0);
        break;
    case TRANSFORM_RDFT:
        if (do_inverse) {
            tab1[         0].im = 0;
            tab1[fft_size_2].im = 0;
            for (i = 1; i < fft_size_2; i++) {
                tab1[fft_size_2+i].re =  tab1[fft_size_2-i].re;
                tab1[fft_size_2+i].im = -tab1[fft_size_2-i].im;
            }

            memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
            tab2[1] = tab1[fft_size_2].re;

            ff_rdft_calc(r, tab2);
            fft_ref(tab_ref, tab1, fft_nbits);
            for (i = 0; i < fft_size; i++) {
                tab[i].re = tab2[i];
                tab[i].im = 0;
            }
            err = check_diff((float *)tab_ref, (float *)tab, fft_size * 2, 0.5);
        } else {
            for (i = 0; i < fft_size; i++) {
                tab2[i]    = tab1[i].re;
                tab1[i].im = 0;
            }
            ff_rdft_calc(r, tab2);
            fft_ref(tab_ref, tab1, fft_nbits);
            tab_ref[0].im = tab_ref[fft_size_2].re;
            err = check_diff((float *)tab_ref, (float *)tab2, fft_size, 1.0);
        }
        break;
    case TRANSFORM_DCT:
        memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
        ff_dct_calc(d, tab);
        if (do_inverse) {
            idct_ref(tab_ref, tab1, fft_nbits);
        } else {
            dct_ref(tab_ref, tab1, fft_nbits);
        }
        err = check_diff((float *)tab_ref, (float *)tab, fft_size, 1.0);
        break;
    }

    /* do a speed test */

    if (do_speed) {
        int64_t time_start, duration;
        int nb_its;

        av_log(NULL, AV_LOG_INFO,"Speed test...\n");
        /* we measure during about 1 seconds */
        nb_its = 1;
        for(;;) {
            time_start = gettime();
            for (it = 0; it < nb_its; it++) {
                switch (transform) {
                case TRANSFORM_MDCT:
                    if (do_inverse) {
                        ff_imdct_calc(m, (float *)tab, (float *)tab1);
                    } else {
                        ff_mdct_calc(m, (float *)tab, (float *)tab1);
                    }
                    break;
                case TRANSFORM_FFT:
                    memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
                    ff_fft_calc(s, tab);
                    break;
                case TRANSFORM_RDFT:
                    memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
                    ff_rdft_calc(r, tab2);
                    break;
                case TRANSFORM_DCT:
                    memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
                    ff_dct_calc(d, tab2);
                    break;
                }
            }
            duration = gettime() - time_start;
            if (duration >= 1000000)
                break;
            nb_its *= 2;
        }
        av_log(NULL, AV_LOG_INFO,"time: %0.1f us/transform [total time=%0.2f s its=%d]\n",
               (double)duration / nb_its,
               (double)duration / 1000000.0,
               nb_its);
    }

    switch (transform) {
    case TRANSFORM_MDCT:
        ff_mdct_end(m);
        break;
    case TRANSFORM_FFT:
        ff_fft_end(s);
        break;
    case TRANSFORM_RDFT:
        ff_rdft_end(r);
        break;
    case TRANSFORM_DCT:
        ff_dct_end(d);
        break;
    }

    av_free(tab);
    av_free(tab1);
    av_free(tab2);
    av_free(tab_ref);
    av_free(exptab);

    return err;
}
Esempio n. 2
0
int main(int argc, char **argv)
{
    FFTComplex *tab, *tab1, *tab_ref;
    FFTSample *tab2;
    enum tf_transform transform = TRANSFORM_FFT;
    FFTContext m, s;
#if FFT_FLOAT
    RDFTContext r;
    DCTContext d;
#if CONFIG_LIBFFTW3
    FFTWContext fftw;
    FFTWComplex *tab_fftw, *tab_fftw_copy;
#endif /* CONFIG_LIBFFTW3 */
#endif /* FFT_FLOAT */
    int it, i, err = 1;
    int do_speed = 0, do_inverse = 0;
    int fft_nbits = 9, fft_size;
    double scale = 1.0;
    AVLFG prng;

    av_lfg_init(&prng, 1);

    for (;;) {
        int c = getopt(argc, argv, "hsitmrdn:f:c:");
        if (c == -1)
            break;
        switch (c) {
        case 'h':
            help();
            return 1;
        case 's':
            do_speed = 1;
            break;
        case 'i':
            do_inverse = 1;
            break;
#if CONFIG_LIBFFTW3
        case 't':
            transform = TRANSFORM_FFTW;
            break;
#endif /* CONFIG_LIBFFTW3 */
        case 'm':
            transform = TRANSFORM_MDCT;
            break;
        case 'r':
            transform = TRANSFORM_RDFT;
            break;
        case 'd':
            transform = TRANSFORM_DCT;
            break;
        case 'n':
            fft_nbits = atoi(optarg);
            break;
        case 'f':
            scale = atof(optarg);
            break;
        case 'c':
        {
            unsigned cpuflags = av_get_cpu_flags();

            if (av_parse_cpu_caps(&cpuflags, optarg) < 0)
                return 1;

            av_force_cpu_flags(cpuflags);
            break;
        }
        }
    }

    fft_size = 1 << fft_nbits;
    tab      = av_malloc_array(fft_size, sizeof(FFTComplex));
    tab1     = av_malloc_array(fft_size, sizeof(FFTComplex));
    tab_ref  = av_malloc_array(fft_size, sizeof(FFTComplex));
    tab2     = av_malloc_array(fft_size, sizeof(FFTSample));
#if CONFIG_LIBFFTW3 && FFT_FLOAT
    tab_fftw      = av_malloc_array(fft_size, sizeof(*tab_fftw));
    tab_fftw_copy = av_malloc_array(fft_size, sizeof(*tab_fftw_copy));
    if (!(tab_fftw && tab_fftw_copy))
        goto cleanup_fftw;
#endif /* CONFIG_LIBFFTW3 */

    if (!(tab && tab1 && tab_ref && tab2))
        goto cleanup;

    switch (transform) {
#if CONFIG_MDCT
    case TRANSFORM_MDCT:
        av_log(NULL, AV_LOG_INFO, "Scale factor is set to %f\n", scale);
        if (do_inverse)
            av_log(NULL, AV_LOG_INFO, "IMDCT");
        else
            av_log(NULL, AV_LOG_INFO, "MDCT");
        ff_mdct_init(&m, fft_nbits, do_inverse, scale);
        break;
#endif /* CONFIG_MDCT */
    case TRANSFORM_FFT:
        if (do_inverse)
            av_log(NULL, AV_LOG_INFO, "IFFT");
        else
            av_log(NULL, AV_LOG_INFO, "FFT");
        ff_fft_init(&s, fft_nbits, do_inverse);
        if ((err = fft_ref_init(fft_nbits, do_inverse)) < 0)
            goto cleanup;
        break;
#if CONFIG_LIBFFTW3 && FFT_FLOAT
    case TRANSFORM_FFTW:
        if (do_inverse)
            av_log(NULL, AV_LOG_INFO, "IFFTW");
        else
            av_log(NULL, AV_LOG_INFO, "FFTW");
        ff_fftw_init(&fftw, fft_size, do_inverse);
        if ((err = fft_ref_init(fft_nbits, do_inverse)) < 0)
            goto cleanup;
        break;
#endif /* CONFIG_LIBFFTW3 */
#if FFT_FLOAT
#    if CONFIG_RDFT
    case TRANSFORM_RDFT:
        if (do_inverse)
            av_log(NULL, AV_LOG_INFO, "IDFT_C2R");
        else
            av_log(NULL, AV_LOG_INFO, "DFT_R2C");
        ff_rdft_init(&r, fft_nbits, do_inverse ? IDFT_C2R : DFT_R2C);
        if ((err = fft_ref_init(fft_nbits, do_inverse)) < 0)
            goto cleanup;
        break;
#    endif /* CONFIG_RDFT */
#    if CONFIG_DCT
    case TRANSFORM_DCT:
        if (do_inverse)
            av_log(NULL, AV_LOG_INFO, "DCT_III");
        else
            av_log(NULL, AV_LOG_INFO, "DCT_II");
        ff_dct_init(&d, fft_nbits, do_inverse ? DCT_III : DCT_II);
        break;
#    endif /* CONFIG_DCT */
#endif /* FFT_FLOAT */
    default:
        av_log(NULL, AV_LOG_ERROR, "Requested transform not supported\n");
        goto cleanup;
    }
    av_log(NULL, AV_LOG_INFO, " %d test\n", fft_size);

    /* generate random data */

    for (i = 0; i < fft_size; i++) {
        tab1[i].re = frandom(&prng);
        tab1[i].im = frandom(&prng);
#if CONFIG_LIBFFTW3 && FFT_FLOAT
        tab_fftw[i][0] = tab1[i].re;
        tab_fftw[i][1] = tab1[i].im;
#endif /* CONFIG_LIBFFTW3 */
    }
#if CONFIG_LIBFFTW3 && FFT_FLOAT
    memcpy(tab_fftw_copy, tab_fftw, fft_size * sizeof(*tab_fftw));
#endif

    /* checking result */
    av_log(NULL, AV_LOG_INFO, "Checking...\n");

    switch (transform) {
#if CONFIG_MDCT
    case TRANSFORM_MDCT:
        if (do_inverse) {
            imdct_ref(&tab_ref->re, &tab1->re, fft_nbits);
            m.imdct_calc(&m, tab2, &tab1->re);
            err = check_diff(&tab_ref->re, tab2, fft_size, scale);
        } else {
            mdct_ref(&tab_ref->re, &tab1->re, fft_nbits);
            m.mdct_calc(&m, tab2, &tab1->re);
            err = check_diff(&tab_ref->re, tab2, fft_size / 2, scale);
        }
        break;
#endif /* CONFIG_MDCT */
    case TRANSFORM_FFT:
        memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
        s.fft_permute(&s, tab);
        s.fft_calc(&s, tab);

        fft_ref(tab_ref, tab1, fft_nbits);
        err = check_diff(&tab_ref->re, &tab->re, fft_size * 2, 1.0);
        break;
#if CONFIG_LIBFFTW3 && FFT_FLOAT
    case TRANSFORM_FFTW:
        fftw.fft_calc(&fftw, tab_fftw);
        fft_ref(tab_ref, tab1, fft_nbits);
        for (i = 0; i < fft_size; i++) {
            tab[i].re = tab_fftw[i][0];
            tab[i].im = tab_fftw[i][1];
        }
        err = check_diff(&tab_ref->re, &tab->re, fft_size * 2, 1.0);
        break;
#endif /* CONFIG_LIBFFTW3 */
#if FFT_FLOAT
#if CONFIG_RDFT
    case TRANSFORM_RDFT:
    {
        int fft_size_2 = fft_size >> 1;
        if (do_inverse) {
            tab1[0].im          = 0;
            tab1[fft_size_2].im = 0;
            for (i = 1; i < fft_size_2; i++) {
                tab1[fft_size_2 + i].re =  tab1[fft_size_2 - i].re;
                tab1[fft_size_2 + i].im = -tab1[fft_size_2 - i].im;
            }

            memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
            tab2[1] = tab1[fft_size_2].re;

            r.rdft_calc(&r, tab2);
            fft_ref(tab_ref, tab1, fft_nbits);
            for (i = 0; i < fft_size; i++) {
                tab[i].re = tab2[i];
                tab[i].im = 0;
            }
            err = check_diff(&tab_ref->re, &tab->re, fft_size * 2, 0.5);
        } else {
            for (i = 0; i < fft_size; i++) {
                tab2[i]    = tab1[i].re;
                tab1[i].im = 0;
            }
            r.rdft_calc(&r, tab2);
            fft_ref(tab_ref, tab1, fft_nbits);
            tab_ref[0].im = tab_ref[fft_size_2].re;
            err = check_diff(&tab_ref->re, tab2, fft_size, 1.0);
        }
        break;
    }
#endif /* CONFIG_RDFT */
#if CONFIG_DCT
    case TRANSFORM_DCT:
        memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
        d.dct_calc(&d, &tab->re);
        if (do_inverse)
            idct_ref(&tab_ref->re, &tab1->re, fft_nbits);
        else
            dct_ref(&tab_ref->re, &tab1->re, fft_nbits);
        err = check_diff(&tab_ref->re, &tab->re, fft_size, 1.0);
        break;
#endif /* CONFIG_DCT */
#endif /* FFT_FLOAT */
    }

    /* do a speed test */

    if (do_speed) {
        int64_t time_start, duration;
        int nb_its;

        av_log(NULL, AV_LOG_INFO, "Speed test...\n");
        /* we measure during about 1 seconds */
        nb_its = 1;
        for (;;) {
            time_start = av_gettime_relative();
            for (it = 0; it < nb_its; it++) {
                switch (transform) {
                case TRANSFORM_MDCT:
                    if (do_inverse)
                        m.imdct_calc(&m, &tab->re, &tab1->re);
                    else
                        m.mdct_calc(&m, &tab->re, &tab1->re);
                    break;
                case TRANSFORM_FFT:
                    memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
                    s.fft_permute(&s, tab);
                    s.fft_calc(&s, tab);
                    break;
#if CONFIG_LIBFFTW3 && FFT_FLOAT
                case TRANSFORM_FFTW:
                    memcpy(tab_fftw, tab_fftw_copy, fft_size * sizeof(*tab_fftw));
                    fftw.fft_calc(&fftw, tab_fftw);
                    break;
#endif /* CONFIG_LIBFFTW3 */
#if FFT_FLOAT
                case TRANSFORM_RDFT:
                    memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
                    r.rdft_calc(&r, tab2);
                    break;
                case TRANSFORM_DCT:
                    memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
                    d.dct_calc(&d, tab2);
                    break;
#endif /* FFT_FLOAT */
                }
            }
            duration = av_gettime_relative() - time_start;
            if (duration >= 1000000)
                break;
            nb_its *= 2;
        }
        av_log(NULL, AV_LOG_INFO,
               "time: %0.2f us/transform [total time=%0.2f s its=%d]\n",
               (double) duration / nb_its,
               (double) duration / 1000000.0,
               nb_its);
    }

    switch (transform) {
#if CONFIG_MDCT
    case TRANSFORM_MDCT:
        ff_mdct_end(&m);
        break;
#endif /* CONFIG_MDCT */
    case TRANSFORM_FFT:
        ff_fft_end(&s);
        break;
#if CONFIG_LIBFFTW3 && FFT_FLOAT
    case TRANSFORM_FFTW:
        ff_fftw_deinit(&fftw);
        break;
#endif /* CONFIG_LIBFFTW3 */
#if FFT_FLOAT
#    if CONFIG_RDFT
    case TRANSFORM_RDFT:
        ff_rdft_end(&r);
        break;
#    endif /* CONFIG_RDFT */
#    if CONFIG_DCT
    case TRANSFORM_DCT:
        ff_dct_end(&d);
        break;
#    endif /* CONFIG_DCT */
#endif /* FFT_FLOAT */
    }

#if CONFIG_LIBFFTW3 && FFT_FLOAT
cleanup_fftw:
    av_freep(&tab_fftw);
#endif /* CONFIG_LIBFFTW3 */
cleanup:
    av_freep(&tab);
    av_freep(&tab1);
    av_freep(&tab2);
    av_freep(&tab_ref);
    av_freep(&exptab);

    if (err)
        printf("Error: %d.\n", err);

    return !!err;
}