yading@10: /*
yading@10:  * Copyright (c) 2012 Mans Rullgard <mans@mansr.com>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include "libavutil/attributes.h"
yading@10: #include "libavutil/samplefmt.h"
yading@10: #include "flacdsp.h"
yading@10: #include "config.h"
yading@10: 
yading@10: #define SAMPLE_SIZE 16
yading@10: #define PLANAR 0
yading@10: #include "flacdsp_template.c"
yading@10: #include "flacdsp_lpc_template.c"
yading@10: 
yading@10: #undef  PLANAR
yading@10: #define PLANAR 1
yading@10: #include "flacdsp_template.c"
yading@10: 
yading@10: #undef  SAMPLE_SIZE
yading@10: #undef  PLANAR
yading@10: #define SAMPLE_SIZE 32
yading@10: #define PLANAR 0
yading@10: #include "flacdsp_template.c"
yading@10: #include "flacdsp_lpc_template.c"
yading@10: 
yading@10: #undef  PLANAR
yading@10: #define PLANAR 1
yading@10: #include "flacdsp_template.c"
yading@10: 
yading@10: static void flac_lpc_16_c(int32_t *decoded, const int coeffs[32],
yading@10:                           int pred_order, int qlevel, int len)
yading@10: {
yading@10:     int i, j;
yading@10: 
yading@10:     for (i = pred_order; i < len - 1; i += 2, decoded += 2) {
yading@10:         int c = coeffs[0];
yading@10:         int d = decoded[0];
yading@10:         int s0 = 0, s1 = 0;
yading@10:         for (j = 1; j < pred_order; j++) {
yading@10:             s0 += c*d;
yading@10:             d = decoded[j];
yading@10:             s1 += c*d;
yading@10:             c = coeffs[j];
yading@10:         }
yading@10:         s0 += c*d;
yading@10:         d = decoded[j] += s0 >> qlevel;
yading@10:         s1 += c*d;
yading@10:         decoded[j + 1] += s1 >> qlevel;
yading@10:     }
yading@10:     if (i < len) {
yading@10:         int sum = 0;
yading@10:         for (j = 0; j < pred_order; j++)
yading@10:             sum += coeffs[j] * decoded[j];
yading@10:         decoded[j] += sum >> qlevel;
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void flac_lpc_32_c(int32_t *decoded, const int coeffs[32],
yading@10:                           int pred_order, int qlevel, int len)
yading@10: {
yading@10:     int i, j;
yading@10: 
yading@10:     for (i = pred_order; i < len; i++, decoded++) {
yading@10:         int64_t sum = 0;
yading@10:         for (j = 0; j < pred_order; j++)
yading@10:             sum += (int64_t)coeffs[j] * decoded[j];
yading@10:         decoded[j] += sum >> qlevel;
yading@10:     }
yading@10: 
yading@10: }
yading@10: 
yading@10: av_cold void ff_flacdsp_init(FLACDSPContext *c, enum AVSampleFormat fmt,
yading@10:                              int bps)
yading@10: {
yading@10:     if (bps > 16) {
yading@10:         c->lpc            = flac_lpc_32_c;
yading@10:         c->lpc_encode     = flac_lpc_encode_c_32;
yading@10:     } else {
yading@10:         c->lpc            = flac_lpc_16_c;
yading@10:         c->lpc_encode     = flac_lpc_encode_c_16;
yading@10:     }
yading@10: 
yading@10:     switch (fmt) {
yading@10:     case AV_SAMPLE_FMT_S32:
yading@10:         c->decorrelate[0] = flac_decorrelate_indep_c_32;
yading@10:         c->decorrelate[1] = flac_decorrelate_ls_c_32;
yading@10:         c->decorrelate[2] = flac_decorrelate_rs_c_32;
yading@10:         c->decorrelate[3] = flac_decorrelate_ms_c_32;
yading@10:         break;
yading@10: 
yading@10:     case AV_SAMPLE_FMT_S32P:
yading@10:         c->decorrelate[0] = flac_decorrelate_indep_c_32p;
yading@10:         c->decorrelate[1] = flac_decorrelate_ls_c_32p;
yading@10:         c->decorrelate[2] = flac_decorrelate_rs_c_32p;
yading@10:         c->decorrelate[3] = flac_decorrelate_ms_c_32p;
yading@10:         break;
yading@10: 
yading@10:     case AV_SAMPLE_FMT_S16:
yading@10:         c->decorrelate[0] = flac_decorrelate_indep_c_16;
yading@10:         c->decorrelate[1] = flac_decorrelate_ls_c_16;
yading@10:         c->decorrelate[2] = flac_decorrelate_rs_c_16;
yading@10:         c->decorrelate[3] = flac_decorrelate_ms_c_16;
yading@10:         break;
yading@10: 
yading@10:     case AV_SAMPLE_FMT_S16P:
yading@10:         c->decorrelate[0] = flac_decorrelate_indep_c_16p;
yading@10:         c->decorrelate[1] = flac_decorrelate_ls_c_16p;
yading@10:         c->decorrelate[2] = flac_decorrelate_rs_c_16p;
yading@10:         c->decorrelate[3] = flac_decorrelate_ms_c_16p;
yading@10:         break;
yading@10:     }
yading@10: 
yading@10:     if (ARCH_ARM)
yading@10:         ff_flacdsp_init_arm(c, fmt, bps);
yading@10: }