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author | Klaus Schmidinger <kls (at) cadsoft (dot) de> | 2001-08-12 18:00:00 +0200 |
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committer | Klaus Schmidinger <kls (at) cadsoft (dot) de> | 2001-08-12 18:00:00 +0200 |
commit | efea0f64d08052b0189d962101e1a3634d4adfc8 (patch) | |
tree | a3feff7ccf6874da549b25ea3b671d15a65d0e3d /ac3dec/imdct_kni.c | |
parent | f1d1c9849c8e27cccb46cf9c0d0ccb59da3f91f9 (diff) | |
download | vdr-patch-lnbsharing-efea0f64d08052b0189d962101e1a3634d4adfc8.tar.gz vdr-patch-lnbsharing-efea0f64d08052b0189d962101e1a3634d4adfc8.tar.bz2 |
Version 0.91vdr-0.91
- Fixed displaying colored button texts that are too long.
- Suppressing replay progress display when replaying a DVD.
- Updated channels.conf.cable (thanks to Uwe Scheffler).
- Updated French OSD texts (thanks to Jean-Claude Repetto).
- Improved AC3 decoding when replaying DVDs (thanks to Matjaz Thaler).
- Fixed handling DVB card indexes when using only one card in a multi-card
system.
- Changed the 'Eject DVD' button text to a simple 'Eject' (the German text
was too long...).
- Made the font file generation more stable (thanks to Artur Skawina).
- Changed the default value for the "DiSEqC" setup parameter to "off".
- The new command line option '-E' can be used to define where the EPG data
shall be written to. This is especially useful if VDR runs in a system
that turns off the video disk when it is not used, and therefore needs
to write the EPG file to a ramdisk (or turn off writing it alltogether).
See 'vdr --help' for details.
- Making sure the disk is up and running before starting recording (this
is important for systems that turn off the video disk when it is not used).
- Added the "Jump" function in replay mode (thanks to Stefan Huelswitt).
See the description of the "Red" key in MANUAL under "Replay Control" for
details.
- Fixed displaying editing marks when toggling a mark in "pause" mode.
- If there is no free DVB device to record, the log message will now be given
only once.
- Made I/O more robust by handling EINTR (thanks to Werner Fink).
Diffstat (limited to 'ac3dec/imdct_kni.c')
-rw-r--r-- | ac3dec/imdct_kni.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/ac3dec/imdct_kni.c b/ac3dec/imdct_kni.c new file mode 100644 index 0000000..b44547a --- /dev/null +++ b/ac3dec/imdct_kni.c @@ -0,0 +1,103 @@ +/* + * imdct_kni.c + * + * Copyright (C) Aaron Holtzman - May 1999 + * + * This file is part of ac3dec, a free Dolby AC-3 stream decoder. + * + * ac3dec is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * ac3dec is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Make; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + */ + +#ifdef __i386__ + +#include <stdlib.h> +#include <stdio.h> +#include <math.h> +#include <mm_accel.h> +#include "ac3.h" +#include "ac3_internal.h" + +#include "downmix.h" +#include "imdct_kni.h" +#include "srfft.h" + +#define N 512 + +/* Delay buffer for time domain interleaving */ +static float xcos_sin_sse[128 * 4] __attribute__((aligned(16))); + +extern void (*imdct_do_512) (float data[],float delay[]); +extern void (*imdct_do_512_nol) (float data[], float delay[]); +extern void (*fft_64p) (complex_t *); + +extern const int pm128[]; +extern float window[]; +extern complex_t buf[128]; + +extern void fft_64p_kni (complex_t *); +extern void fft_128p_kni (complex_t *); + +static void imdct_do_512_kni (float data[], float delay[]); +static void imdct_do_512_nol_kni (float data[], float delay[]); + + +int imdct_init_kni (void) +{ + uint32_t accel = mm_accel (); + + if (accel & MM_ACCEL_X86_MMXEXT) { + int i; + float scale = 255.99609372; + + fprintf (stderr, "Using SSE for IMDCT\n"); + imdct_do_512 = imdct_do_512_kni; + imdct_do_512_nol = imdct_do_512_nol_kni; + fft_64p = fft_64p_kni; + + for (i=0; i < 128; i++) { + float xcos_i = cos(2.0f * M_PI * (8*i+1)/(8*N)) * scale; + float xsin_i = sin(2.0f * M_PI * (8*i+1)/(8*N)) * scale; + xcos_sin_sse[i * 4] = xcos_i; + xcos_sin_sse[i * 4 + 1] = -xsin_i; + xcos_sin_sse[i * 4 + 2] = -xsin_i; + xcos_sin_sse[i * 4 + 3] = -xcos_i; + } + + return 0; + } else + return -1; +} + + +static void imdct_do_512_kni (float data[], float delay[]) +{ + imdct512_pre_ifft_twiddle_kni (pm128, buf, data, xcos_sin_sse); + fft_128p_kni (buf); + imdct512_post_ifft_twiddle_kni (buf, xcos_sin_sse); + imdct512_window_delay_kni (buf, data, window, delay); +} + + +static void imdct_do_512_nol_kni (float data[], float delay[]) +{ + imdct512_pre_ifft_twiddle_kni (pm128, buf, data, xcos_sin_sse); + fft_128p_kni (buf); + imdct512_post_ifft_twiddle_kni (buf, xcos_sin_sse); + imdct512_window_delay_nol_kni (buf, data, window, delay); +} + +#endif |