* ac3_downmix.c: ac3 downmix functions
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
+ * $Id: ac3_downmix.c,v 1.22 2001/05/06 04:32:02 sam Exp $
*
- * Authors:
+ * Authors: Michel Kaempf <maxx@via.ecp.fr>
+ * Aaron Holtzman <aholtzma@engr.uvic.ca>
+ * Renaud Dartus <reno@videolan.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*****************************************************************************/
#include "defs.h"
-#include "int_types.h"
-#include "ac3_decoder.h"
-#include "ac3_internal.h"
+#include <string.h> /* memcpy() */
-#define NORM 16384
+#include "config.h"
+#include "common.h"
+#include "threads.h"
+#include "mtime.h"
-typedef struct prefs_s {
- u16 use_dolby_surround;
- u16 dual_mono_channel_select;
-} prefs_t;
+#include "tests.h"
-prefs_t global_prefs = {0,0};
+#include "stream_control.h"
+#include "input_ext-dec.h"
-/* Pre-scaled downmix coefficients */
-static float cmixlev_lut[4] = { 0.2928, 0.2468, 0.2071, 0.2468 };
-static float smixlev_lut[4] = { 0.2928, 0.2071, 0.0 , 0.2071 };
-
-/* Downmix into _two_ channels...other downmix modes aren't implemented
- * to reduce complexity. Realistically, there aren't many machines around
- * with > 2 channel output anyways */
+#include "ac3_decoder.h"
+#include "ac3_internal.h"
+#include "ac3_downmix.h"
-void downmix (ac3dec_t * p_ac3dec, s16 * out_buf)
+void downmix_init (downmix_t * p_downmix)
{
- int j;
- float right_tmp;
- float left_tmp;
- float clev,slev;
- float *centre = 0, *left = 0, *right = 0, *left_sur = 0, *right_sur = 0;
-
- /*
- if (p_ac3dec->bsi.acmod > 7)
- intf_ErrMsg( "ac3dec: (downmix) invalid acmod number\n" );
- */
-
- /* There are two main cases, with or without Dolby Surround */
- if (global_prefs.use_dolby_surround) {
- switch(p_ac3dec->bsi.acmod) {
- case 7: /* 3/2 */
- left = p_ac3dec->samples.channel[0];
- centre = p_ac3dec->samples.channel[1];
- right = p_ac3dec->samples.channel[2];
- left_sur = p_ac3dec->samples.channel[3];
- right_sur = p_ac3dec->samples.channel[4];
-
- for (j = 0; j < 256; j++) {
- right_tmp = 0.2265f * *left_sur++ + 0.2265f * *right_sur++;
- left_tmp = -1 * right_tmp;
- right_tmp += 0.3204f * *right++ + 0.2265f * *centre;
- left_tmp += 0.3204f * *left++ + 0.2265f * *centre++;
-
- *(out_buf++) = left_tmp * NORM;
- *(out_buf++) = right_tmp * NORM;
- }
- break;
-
- case 6: /* 2/2 */
- left = p_ac3dec->samples.channel[0];
- right = p_ac3dec->samples.channel[1];
- left_sur = p_ac3dec->samples.channel[2];
- right_sur = p_ac3dec->samples.channel[3];
-
- for (j = 0; j < 256; j++) {
- right_tmp = 0.2265f * *left_sur++ + 0.2265f * *right_sur++;
- left_tmp = -1 * right_tmp;
- right_tmp += 0.3204f * *right++;
- left_tmp += 0.3204f * *left++ ;
-
- *(out_buf++) = left_tmp * NORM;
- *(out_buf++) = right_tmp * NORM;
- }
- break;
-
- case 5: /* 3/1 */
- left = p_ac3dec->samples.channel[0];
- centre = p_ac3dec->samples.channel[1];
- right = p_ac3dec->samples.channel[2];
- /* Mono surround */
- right_sur = p_ac3dec->samples.channel[3];
-
- for (j = 0; j < 256; j++) {
- right_tmp = 0.2265f * *right_sur++;
- left_tmp = - right_tmp;
- right_tmp += 0.3204f * *right++ + 0.2265f * *centre;
- left_tmp += 0.3204f * *left++ + 0.2265f * *centre++;
-
- *(out_buf++) = left_tmp * NORM;
- *(out_buf++) = right_tmp * NORM;
- }
- break;
-
- case 4: /* 2/1 */
- left = p_ac3dec->samples.channel[0];
- right = p_ac3dec->samples.channel[1];
- /* Mono surround */
- right_sur = p_ac3dec->samples.channel[2];
-
- for (j = 0; j < 256; j++) {
- right_tmp = 0.2265f * *right_sur++;
- left_tmp = - right_tmp;
- right_tmp += 0.3204f * *right++;
- left_tmp += 0.3204f * *left++;
-
- *(out_buf++) = left_tmp * NORM;
- *(out_buf++) = right_tmp * NORM;
- }
- break;
-
- case 3: /* 3/0 */
- left = p_ac3dec->samples.channel[0];
- centre = p_ac3dec->samples.channel[1];
- right = p_ac3dec->samples.channel[2];
-
- for (j = 0; j < 256; j++) {
- right_tmp = 0.3204f * *right++ + 0.2265f * *centre;
- left_tmp = 0.3204f * *left++ + 0.2265f * *centre++;
-
- *(out_buf++) = left_tmp * NORM;
- *(out_buf++) = right_tmp * NORM;
- }
- break;
-
- case 2: /* 2/0 */
- left = p_ac3dec->samples.channel[0];
- right = p_ac3dec->samples.channel[1];
-
- for (j = 0; j < 256; j++) {
- *(out_buf++) = *(left++) * NORM;
- *(out_buf++) = *(right++) * NORM;
- }
- break;
-
- case 1: /* 1/0 */
- /* Mono program! */
- right = p_ac3dec->samples.channel[0];
-
- for (j = 0; j < 256; j++) {
- right_tmp = 0.7071f * *right++;
-
- *(out_buf++) = right_tmp * NORM;
- *(out_buf++) = right_tmp * NORM;
- }
- break;
-
- case 0: /* 1+1 */
- /* Dual mono, output selected by user */
- right = p_ac3dec->samples.channel[global_prefs.dual_mono_channel_select];
-
- for (j = 0; j < 256; j++) {
- right_tmp = 0.7071f * *right++;
-
- *(out_buf++) = right_tmp * NORM;
- *(out_buf++) = right_tmp * NORM;
- }
- break;
- }
- } else {
- /* Non-Dolby surround downmixes */
- switch(p_ac3dec->bsi.acmod) {
- case 7: /* 3/2 */
- left = p_ac3dec->samples.channel[0];
- centre = p_ac3dec->samples.channel[1];
- right = p_ac3dec->samples.channel[2];
- left_sur = p_ac3dec->samples.channel[3];
- right_sur = p_ac3dec->samples.channel[4];
-
- clev = cmixlev_lut[p_ac3dec->bsi.cmixlev];
- slev = smixlev_lut[p_ac3dec->bsi.surmixlev];
-
- for (j = 0; j < 256; j++) {
- right_tmp= 0.4142f * *right++ + clev * *centre + slev * *right_sur++;
- left_tmp = 0.4142f * *left++ + clev * *centre++ + slev * *left_sur++;
-
- *(out_buf++) = left_tmp * NORM;
- *(out_buf++) = right_tmp * NORM;
- }
- break;
-
- case 6: /* 2/2 */
- left = p_ac3dec->samples.channel[0];
- right = p_ac3dec->samples.channel[1];
- left_sur = p_ac3dec->samples.channel[2];
- right_sur = p_ac3dec->samples.channel[3];
-
- slev = smixlev_lut[p_ac3dec->bsi.surmixlev];
-
- for (j = 0; j < 256; j++) {
- right_tmp= 0.4142f * *right++ + slev * *right_sur++;
- left_tmp = 0.4142f * *left++ + slev * *left_sur++;
-
- *(out_buf++) = left_tmp * NORM;
- *(out_buf++) = right_tmp * NORM;
- }
- break;
-
- case 5: /* 3/1 */
- left = p_ac3dec->samples.channel[0];
- centre = p_ac3dec->samples.channel[1];
- right = p_ac3dec->samples.channel[2];
- /* Mono surround */
- right_sur = p_ac3dec->samples.channel[3];
-
- clev = cmixlev_lut[p_ac3dec->bsi.cmixlev];
- slev = smixlev_lut[p_ac3dec->bsi.surmixlev];
-
- for (j = 0; j < 256; j++) {
- right_tmp= 0.4142f * *right++ + clev * *centre + slev * *right_sur;
- left_tmp = 0.4142f * *left++ + clev * *centre++ + slev * *right_sur++;
-
- *(out_buf++) = left_tmp * NORM;
- *(out_buf++) = right_tmp * NORM;
- }
- break;
-
- case 4: /* 2/1 */
- left = p_ac3dec->samples.channel[0];
- right = p_ac3dec->samples.channel[1];
- /* Mono surround */
- right_sur = p_ac3dec->samples.channel[2];
-
- slev = smixlev_lut[p_ac3dec->bsi.surmixlev];
-
- for (j = 0; j < 256; j++) {
- right_tmp= 0.4142f * *right++ + slev * *right_sur;
- left_tmp = 0.4142f * *left++ + slev * *right_sur++;
-
- *(out_buf++) = left_tmp * NORM;
- *(out_buf++) = right_tmp * NORM;
- }
- break;
-
- case 3: /* 3/0 */
- left = p_ac3dec->samples.channel[0];
- centre = p_ac3dec->samples.channel[1];
- right = p_ac3dec->samples.channel[2];
-
- clev = cmixlev_lut[p_ac3dec->bsi.cmixlev];
-
- for (j = 0; j < 256; j++) {
- right_tmp= 0.4142f * *right++ + clev * *centre;
- left_tmp = 0.4142f * *left++ + clev * *centre++;
-
- *(out_buf++) = left_tmp * NORM;
- *(out_buf++) = right_tmp * NORM;
- }
- break;
-
- case 2: /* 2/0 */
- left = p_ac3dec->samples.channel[0];
- right = p_ac3dec->samples.channel[1];
-
- for (j = 0; j < 256; j++) {
- *(out_buf++) = *(left++) * NORM;
- *(out_buf++) = *(right++) * NORM;
- }
- break;
-
- case 1: /* 1/0 */
- /* Mono program! */
- right = p_ac3dec->samples.channel[0];
-
- for (j = 0; j < 256; j++) {
- right_tmp = 0.7071f * *right++;
-
- *(out_buf++) = right_tmp * NORM;
- *(out_buf++) = right_tmp * NORM;
- }
- break;
-
- case 0: /* 1+1 */
- /* Dual mono, output selected by user */
- right = p_ac3dec->samples.channel[global_prefs.dual_mono_channel_select];
-
- for (j = 0; j < 256; j++) {
- right_tmp = 0.7071f * *right++;
-
- *(out_buf++) = right_tmp * NORM;
- *(out_buf++) = right_tmp * NORM;
- }
- break;
- }
+#if 0
+ if ( TestCPU (CPU_CAPABILITY_MMX) )
+ {
+ fprintf(stderr,"Using MMX for downmix\n");
+ p_downmix->downmix_3f_2r_to_2ch = downmix_3f_2r_to_2ch_kni;
+ p_downmix->downmix_2f_2r_to_2ch = downmix_2f_2r_to_2ch_kni;
+ p_downmix->downmix_3f_1r_to_2ch = downmix_3f_1r_to_2ch_kni;
+ p_downmix->downmix_2f_1r_to_2ch = downmix_2f_1r_to_2ch_kni;
+ p_downmix->downmix_3f_0r_to_2ch = downmix_3f_0r_to_2ch_kni;
+ p_downmix->stream_sample_2ch_to_s16 = stream_sample_2ch_to_s16_kni;
+ p_downmix->stream_sample_1ch_to_s16 = stream_sample_1ch_to_s16_kni;
+ } else
+#endif
+ {
+ p_downmix->downmix_3f_2r_to_2ch = downmix_3f_2r_to_2ch_c;
+ p_downmix->downmix_2f_2r_to_2ch = downmix_2f_2r_to_2ch_c;
+ p_downmix->downmix_3f_1r_to_2ch = downmix_3f_1r_to_2ch_c;
+ p_downmix->downmix_2f_1r_to_2ch = downmix_2f_1r_to_2ch_c;
+ p_downmix->downmix_3f_0r_to_2ch = downmix_3f_0r_to_2ch_c;
+ p_downmix->stream_sample_2ch_to_s16 = stream_sample_2ch_to_s16_c;
+ p_downmix->stream_sample_1ch_to_s16 = stream_sample_1ch_to_s16_c;
}
}
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