summaryrefslogtreecommitdiff
path: root/ac3dec/downmix.c
diff options
context:
space:
mode:
Diffstat (limited to 'ac3dec/downmix.c')
-rw-r--r--ac3dec/downmix.c441
1 files changed, 51 insertions, 390 deletions
diff --git a/ac3dec/downmix.c b/ac3dec/downmix.c
index 94bc51a..8eac3e2 100644
--- a/ac3dec/downmix.c
+++ b/ac3dec/downmix.c
@@ -1,10 +1,7 @@
/*
- *
- * downmix.c
+ * imdct.c
*
- * Copyright (C) Aaron Holtzman - Sept 1999
- *
- * Originally based on code by Yuqing Deng.
+ * Copyright (C) Aaron Holtzman - May 1999
*
* This file is part of ac3dec, a free Dolby AC-3 stream decoder.
*
@@ -28,401 +25,65 @@
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
+#include <mm_accel.h>
+
#include "ac3.h"
#include "ac3_internal.h"
-
-#include "decode.h"
-#include "downmix.h"
#include "debug.h"
+#include "downmix.h"
+#include "downmix_c.h"
+#include "downmix_i386.h"
+#ifdef HAVE_KNI
+#include "downmix_kni.h"
+#endif
+void (*downmix_3f_2r_to_2ch)(float *samples, dm_par_t * dm_par);
+void (*downmix_3f_1r_to_2ch)(float *samples, dm_par_t * dm_par);
+void (*downmix_2f_2r_to_2ch)(float *samples, dm_par_t * dm_par);
+void (*downmix_2f_1r_to_2ch)(float *samples, dm_par_t * dm_par);
+void (*downmix_3f_0r_to_2ch)(float *samples, dm_par_t * dm_par);
+void (*stream_sample_2ch_to_s16)(int16_t *s16_samples, float *left, float *right);
+void (*stream_sample_1ch_to_s16)(int16_t *s16_samples, float *center);
-//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 };
-static void
-downmix_3f_2r_to_2ch(bsi_t* bsi, stream_samples_t samples,sint_16 *s16_samples)
+void downmix_init()
{
- uint_32 j;
- float right_tmp;
- float left_tmp;
- float clev,slev;
- float *centre = 0, *left = 0, *right = 0, *left_sur = 0, *right_sur = 0;
-
- left = samples[0];
- centre = samples[1];
- right = samples[2];
- left_sur = samples[3];
- right_sur = samples[4];
-
- clev = cmixlev_lut[bsi->cmixlev];
- slev = smixlev_lut[bsi->surmixlev];
-
-#if defined DOLBY_SURROUND
- for (j = 0; j < 256; j++)
+#ifdef __i386__
+#ifdef HAVE_KNI
+ uint32_t accel = mm_accel ();
+
+// other dowmixing should go here too
+ if (accel & MM_ACCEL_X86_MMXEXT) {
+ dprintf("Using SSE for downmix\n");
+ downmix_3f_2r_to_2ch = downmix_3f_2r_to_2ch_kni;
+ downmix_2f_2r_to_2ch = downmix_2f_2r_to_2ch_kni;
+ downmix_3f_1r_to_2ch = downmix_3f_1r_to_2ch_kni;
+ downmix_2f_1r_to_2ch = downmix_2f_1r_to_2ch_kni;
+ downmix_3f_0r_to_2ch = downmix_3f_0r_to_2ch_kni;
+ stream_sample_2ch_to_s16 = stream_sample_2ch_to_s16_kni;
+ stream_sample_1ch_to_s16 = stream_sample_1ch_to_s16_kni;
+ } else if (accel & MM_ACCEL_X86_3DNOW) {
+ } else
+#endif
+#endif
{
- right_tmp = *left_sur++ + *right_sur++;
- left_tmp = 1.4142f * *left++ + *centre - right_tmp;
- right_tmp += 1.4142f * *right++ + *centre++;
-
- s16_samples[j * 2 ] = (sint_16) (left_tmp * 16000.0f);
- s16_samples[j * 2 + 1] = (sint_16) (right_tmp * 16000.0f);
- }
+ downmix_3f_2r_to_2ch = downmix_3f_2r_to_2ch_c;
+ downmix_2f_2r_to_2ch = downmix_2f_2r_to_2ch_c;
+ downmix_3f_1r_to_2ch = downmix_3f_1r_to_2ch_c;
+ downmix_2f_1r_to_2ch = downmix_2f_1r_to_2ch_c;
+ downmix_3f_0r_to_2ch = downmix_3f_0r_to_2ch_c;
+#ifdef __i386__
+#if 1
+ stream_sample_2ch_to_s16 = stream_sample_2ch_to_s16_c;
+ stream_sample_1ch_to_s16 = stream_sample_1ch_to_s16_c;
#else
- for (j = 0; j < 256; j++)
- {
- left_tmp = 0.4142f * *left++ + clev * *centre + slev * *left_sur++;
- right_tmp= 0.4142f * *right++ + clev * *centre++ + slev * *right_sur++;
-
- s16_samples[j * 2 ] = (sint_16) (left_tmp * 32767.0f);
- s16_samples[j * 2 + 1] = (sint_16) (right_tmp * 32767.0f);
- }
+ stream_sample_2ch_to_s16 = stream_sample_2ch_to_s16_i386;
+ stream_sample_1ch_to_s16 = stream_sample_1ch_to_s16_i386;
+#endif
+#else
+ stream_sample_2ch_to_s16 = stream_sample_2ch_to_s16_c;
+ stream_sample_1ch_to_s16 = stream_sample_1ch_to_s16_c;
#endif
-}
-
-static void
-downmix_2f_2r_to_2ch(bsi_t* bsi, stream_samples_t samples,sint_16 *s16_samples)
-{
- uint_32 j;
- float right_tmp;
- float left_tmp;
- float slev;
- float *left = 0, *right = 0, *left_sur = 0, *right_sur = 0;
-
- left = samples[0];
- right = samples[1];
- left_sur = samples[2];
- right_sur = samples[3];
-
- slev = smixlev_lut[bsi->surmixlev];
-
- for (j = 0; j < 256; j++)
- {
- left_tmp = 0.4142f * *left++ + slev * *left_sur++;
- right_tmp= 0.4142f * *right++ + slev * *right_sur++;
-
- s16_samples[j * 2 ] = (sint_16) (left_tmp * 32767.0f);
- s16_samples[j * 2 + 1] = (sint_16) (right_tmp * 32767.0f);
- }
-}
-
-static void
-downmix_3f_1r_to_2ch(bsi_t* bsi, stream_samples_t samples,sint_16 *s16_samples)
-{
- uint_32 j;
- float right_tmp;
- float left_tmp;
- float clev,slev;
- float *centre = 0, *left = 0, *right = 0, *sur = 0;
-
- left = samples[0];
- centre = samples[1];
- right = samples[2];
- //Mono surround
- sur = samples[3];
-
- clev = cmixlev_lut[bsi->cmixlev];
- slev = smixlev_lut[bsi->surmixlev];
-
- for (j = 0; j < 256; j++)
- {
- left_tmp = 0.4142f * *left++ + clev * *centre++ + slev * *sur;
- right_tmp= 0.4142f * *right++ + clev * *centre + slev * *sur++;
-
- s16_samples[j * 2 ] = (sint_16) (left_tmp * 32767.0f);
- s16_samples[j * 2 + 1] = (sint_16) (right_tmp * 32767.0f);
- }
-}
-
-
-static void
-downmix_2f_1r_to_2ch(bsi_t* bsi, stream_samples_t samples,sint_16 *s16_samples)
-{
- uint_32 j;
- float right_tmp;
- float left_tmp;
- float slev;
- float *left = 0, *right = 0, *sur = 0;
-
- left = samples[0];
- right = samples[1];
- //Mono surround
- sur = samples[2];
-
- slev = smixlev_lut[bsi->surmixlev];
-
- for (j = 0; j < 256; j++)
- {
- left_tmp = 0.4142f * *left++ + slev * *sur;
- right_tmp= 0.4142f * *right++ + slev * *sur++;
-
- s16_samples[j * 2 ] = (sint_16) (left_tmp * 32767.0f);
- s16_samples[j * 2 + 1] = (sint_16) (right_tmp * 32767.0f);
- }
-}
-
-static void
-downmix_3f_0r_to_2ch(bsi_t* bsi, stream_samples_t samples,sint_16 *s16_samples)
-{
- uint_32 j;
- float right_tmp;
- float left_tmp;
- float clev;
- float *centre = 0, *left = 0, *right = 0;
-
- left = samples[0];
- centre = samples[1];
- right = samples[2];
-
- clev = cmixlev_lut[bsi->cmixlev];
-
- for (j = 0; j < 256; j++)
- {
- left_tmp = 0.4142f * *left++ + clev * *centre;
- right_tmp= 0.4142f * *right++ + clev * *centre++;
-
- s16_samples[j * 2 ] = (sint_16) (left_tmp * 32767.0f);
- s16_samples[j * 2 + 1] = (sint_16) (right_tmp * 32767.0f);
- }
-}
-
-static void
-downmix_2f_0r_to_2ch(bsi_t* bsi, stream_samples_t samples,sint_16 *s16_samples)
-{
- uint_32 j;
- float *left = 0, *right = 0;
-
- left = samples[0];
- right = samples[1];
-
- for (j = 0; j < 256; j++)
- {
- s16_samples[j * 2 ] = (sint_16) (*left++ * 32767.0f);
- s16_samples[j * 2 + 1] = (sint_16) (*right++ * 32767.0f);
- }
-}
-
-static void
-downmix_1f_0r_to_2ch(float *centre,sint_16 *s16_samples)
-{
- uint_32 j;
- float tmp;
-
- //Mono program!
-
- for (j = 0; j < 256; j++)
- {
- tmp = 32767.0f * 0.7071f * *centre++;
-
- s16_samples[j * 2 ] = s16_samples[j * 2 + 1] = (sint_16) tmp;
- }
-}
-
-//
-// Downmix into 2 or 4 channels (4 ch isn't in quite yet)
-//
-// The downmix function names have the following format
-//
-// downmix_Xf_Yr_to_[2|4]ch[_dolby]
-//
-// where X = number of front channels
-// Y = number of rear channels
-// [2|4] = number of output channels
-// [_dolby] = with or without dolby surround mix
-//
-
-void downmix(bsi_t* bsi, stream_samples_t samples,sint_16 *s16_samples)
-{
- if(bsi->acmod > 7)
- dprintf("(downmix) invalid acmod number\n");
-
- //
- //There are two main cases, with or without Dolby Surround
- //
- if(ac3_config.flags & AC3_DOLBY_SURR_ENABLE)
- {
- fprintf(stderr,"Dolby Surround Mixes not currently enabled\n");
- exit(1);
- }
-
- //Non-Dolby surround downmixes
- switch(bsi->acmod)
- {
- // 3/2
- case 7:
- downmix_3f_2r_to_2ch(bsi,samples,s16_samples);
- break;
-
- // 2/2
- case 6:
- downmix_2f_2r_to_2ch(bsi,samples,s16_samples);
- break;
-
- // 3/1
- case 5:
- downmix_3f_1r_to_2ch(bsi,samples,s16_samples);
- break;
-
- // 2/1
- case 4:
- downmix_2f_1r_to_2ch(bsi,samples,s16_samples);
- break;
-
- // 3/0
- case 3:
- downmix_3f_0r_to_2ch(bsi,samples,s16_samples);
- break;
-
- case 2:
- downmix_2f_0r_to_2ch(bsi,samples,s16_samples);
- break;
-
- // 1/0
- case 1:
- downmix_1f_0r_to_2ch(samples[0],s16_samples);
- break;
-
- // 1+1
- case 0:
- downmix_1f_0r_to_2ch(samples[ac3_config.dual_mono_ch_sel],s16_samples);
- break;
}
}
-
-
-
-#if 0
-
- //the dolby mixes lay here for the time being
- switch(bsi->acmod)
- {
- // 3/2
- case 7:
- left = samples[0];
- centre = samples[1];
- right = samples[2];
- left_sur = samples[3];
- right_sur = samples[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++;
-
- samples[1][j] = right_tmp;
- samples[0][j] = left_tmp;
- }
-
- break;
-
- // 2/2
- case 6:
- left = samples[0];
- right = samples[1];
- left_sur = samples[2];
- right_sur = samples[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++ ;
-
- samples[1][j] = right_tmp;
- samples[0][j] = left_tmp;
- }
- break;
-
- // 3/1
- case 5:
- left = samples[0];
- centre = samples[1];
- right = samples[2];
- //Mono surround
- right_sur = samples[3];
-
- for (j = 0; j < 256; j++)
- {
- right_tmp = 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++;
-
- samples[1][j] = right_tmp;
- samples[0][j] = left_tmp;
- }
- break;
-
- // 2/1
- case 4:
- left = samples[0];
- right = samples[1];
- //Mono surround
- right_sur = samples[2];
-
- for (j = 0; j < 256; j++)
- {
- right_tmp = 0.2265f * *right_sur++;
- left_tmp = -1 * right_tmp;
- right_tmp += 0.3204f * *right++;
- left_tmp += 0.3204f * *left++;
-
- samples[1][j] = right_tmp;
- samples[0][j] = left_tmp;
- }
- break;
-
- // 3/0
- case 3:
- left = samples[0];
- centre = samples[1];
- right = samples[2];
-
- for (j = 0; j < 256; j++)
- {
- right_tmp = 0.3204f * *right++ + 0.2265f * *centre;
- left_tmp = 0.3204f * *left++ + 0.2265f * *centre++;
-
- samples[1][j] = right_tmp;
- samples[0][j] = left_tmp;
- }
- break;
-
- // 2/0
- case 2:
- //Do nothing!
- break;
-
- // 1/0
- case 1:
- //Mono program!
- right = samples[0];
-
- for (j = 0; j < 256; j++)
- {
- right_tmp = 0.7071f * *right++;
-
- samples[1][j] = right_tmp;
- samples[0][j] = right_tmp;
- }
-
- break;
-
- // 1+1
- case 0:
- //Dual mono, output selected by user
- right = samples[ac3_config.dual_mono_ch_sel];
-
- for (j = 0; j < 256; j++)
- {
- right_tmp = 0.7071f * *right++;
-
- samples[1][j] = right_tmp;
- samples[0][j] = right_tmp;
- }
- break;
-#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 04:00:23 +0000