Exemplo n.º 1
0
uint8_t sbrDecodeSingleFramePS(sbr_info *sbr, real_t *left_channel, real_t *right_channel,
                               const uint8_t just_seeked, const uint8_t downSampledSBR)
{
    uint8_t l, k;
    uint8_t dont_process = 0;
    uint8_t ret = 0;

    memset(p_XLR->X_L, 0, sizeof(*p_XLR->X_L));
    memset(p_XLR->X_R, 0, sizeof(*p_XLR->X_R));
    if (sbr == NULL)
        return 20;

    /* case can occur due to bit errors */
    if (sbr->id_aac != ID_SCE && sbr->id_aac != ID_LFE)
        return 21;

    if (sbr->ret || (sbr->header_count == 0))
    {
        /* don't process just upsample */
        dont_process = 1;

        /* Re-activate reset for next frame */
        if (sbr->ret && sbr->Reset)
            sbr->bs_start_freq_prev = -1;
    }

    if (just_seeked)
    {
        sbr->just_seeked = 1;
    } else {
        sbr->just_seeked = 0;
    }

    sbr_process_channel(sbr, left_channel, p_XLR->X_L, 0, dont_process, downSampledSBR);

    /* copy some extra data for PS */
    for (l = 32; l < 38; l++)
    {
        for (k = 0; k < 5; k++)
        {
            QMF_RE(p_XLR->X_L[l][k]) = QMF_RE(sbr->Xsbr[0][sbr->tHFAdj+l][k]);
            QMF_IM(p_XLR->X_L[l][k]) = QMF_IM(sbr->Xsbr[0][sbr->tHFAdj+l][k]);
        }
    }

    /* perform parametric stereo */
#ifdef DRM_PS
    if (sbr->Is_DRM_SBR)
    {
        drm_ps_decode(sbr->drm_ps, (sbr->ret > 0), sbr->sample_rate, p_XLR->X_L, p_XLR->X_R);
    } else {
#endif
#ifdef PS_DEC
        ps_decode(&sbr->ps, p_XLR->X_L, p_XLR->X_R);
#endif
#ifdef DRM_PS
    }
#endif

    /* subband synthesis */
    if (downSampledSBR)
    {
        sbr_qmf_synthesis_32(sbr, &sbr->qmfs[0], p_XLR->X_L, left_channel);
        sbr_qmf_synthesis_32(sbr, &sbr->qmfs[1], p_XLR->X_R, right_channel);
    } else {
        sbr_qmf_synthesis_64(sbr, &sbr->qmfs[0], p_XLR->X_L, left_channel);
        sbr_qmf_synthesis_64(sbr, &sbr->qmfs[1], p_XLR->X_R, right_channel);
    }

    if (sbr->bs_header_flag)
        sbr->just_seeked = 0;

    if (sbr->header_count != 0 && sbr->ret == 0)
    {
        ret = sbr_save_prev_data(sbr, 0);
        if (ret) return ret;
    }

    sbr_save_matrix(sbr, 0);

    sbr->frame++;

    return 0;
}
Exemplo n.º 2
0
uint8_t sbrDecodeSingleFramePS(sbr_info *sbr, real_t *left_channel, real_t *right_channel,
                               const uint8_t just_seeked, const uint8_t downSampledSBR)
{
    uint8_t l, k;
    uint8_t dont_process = 0;
    uint8_t ret = 0;
    ALIGN qmf_t X_left[38][64] = {{0}};
    ALIGN qmf_t X_right[38][64] = {{0}}; /* must set this to 0 */

    if (sbr == NULL)
        return 20;

    /* case can occur due to bit errors */
    if (sbr->id_aac != ID_SCE && sbr->id_aac != ID_LFE)
        return 21;

    if (sbr->ret || (sbr->header_count == 0))
    {
        /* don't process just upsample */
        dont_process = 1;

        /* Re-activate reset for next frame */
        if (sbr->ret && sbr->Reset)
            sbr->bs_start_freq_prev = -1;
    }

    if (just_seeked)
    {
        sbr->just_seeked = 1;
    } else {
        sbr->just_seeked = 0;
    }

    if (sbr->qmfs[1] == NULL)
    {
        sbr->qmfs[1] = qmfs_init((downSampledSBR)?32:64);
    }

    sbr->ret += sbr_process_channel(sbr, left_channel, X_left, 0, dont_process, downSampledSBR);

    /* copy some extra data for PS */
    for (l = sbr->numTimeSlotsRate; l < sbr->numTimeSlotsRate + 6; l++)
    {
        for (k = 0; k < 5; k++)
        {
            QMF_RE(X_left[l][k]) = QMF_RE(sbr->Xsbr[0][sbr->tHFAdj+l][k]);
            QMF_IM(X_left[l][k]) = QMF_IM(sbr->Xsbr[0][sbr->tHFAdj+l][k]);
        }
    }

    /* perform parametric stereo */
#ifdef DRM_PS
    if (sbr->Is_DRM_SBR)
    {
        drm_ps_decode(sbr->drm_ps, (sbr->ret > 0), X_left, X_right);
    } else {
#endif
#ifdef PS_DEC
        ps_decode(sbr->ps, X_left, X_right);
#endif
#ifdef DRM_PS
    }
#endif

    /* subband synthesis */
    if (downSampledSBR)
    {
        sbr_qmf_synthesis_32(sbr, sbr->qmfs[0], X_left, left_channel);
        sbr_qmf_synthesis_32(sbr, sbr->qmfs[1], X_right, right_channel);
    } else {
        sbr_qmf_synthesis_64(sbr, sbr->qmfs[0], X_left, left_channel);
        sbr_qmf_synthesis_64(sbr, sbr->qmfs[1], X_right, right_channel);
    }

    if (sbr->bs_header_flag)
        sbr->just_seeked = 0;

    if (sbr->header_count != 0 && sbr->ret == 0)
    {
        ret = sbr_save_prev_data(sbr, 0);
        if (ret) return ret;
    }

    sbr_save_matrix(sbr, 0);

    sbr->frame++;

    return 0;
}