diff options
Diffstat (limited to 'src/libmpeg2/idct.c')
| -rw-r--r-- | src/libmpeg2/idct.c | 107 |
1 files changed, 58 insertions, 49 deletions
diff --git a/src/libmpeg2/idct.c b/src/libmpeg2/idct.c index 0b77a62ed..1c577aa5f 100644 --- a/src/libmpeg2/idct.c +++ b/src/libmpeg2/idct.c @@ -1,12 +1,14 @@ /* * idct.c - * Copyright (C) 1999-2001 Aaron Holtzman <aholtzma@ess.engr.uvic.ca> + * Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org> + * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca> * * Portions of this code are from the MPEG software simulation group * idct implementation. This code will be replaced with a new * implementation soon. * * This file is part of mpeg2dec, a free MPEG-2 video stream decoder. + * See http://libmpeg2.sourceforge.net/ for updates. * * mpeg2dec is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -40,6 +42,7 @@ #include "config.h" #include <stdio.h> +#include <stdlib.h> #include <inttypes.h> #include "mpeg2_internal.h" @@ -53,56 +56,12 @@ #define W7 565 /* 2048*sqrt (2)*cos (7*pi/16) */ /* idct main entry point */ -void (*idct_block_copy) (int16_t * block, uint8_t * dest, int stride); -void (*idct_block_add) (int16_t * block, uint8_t * dest, int stride); - -static void idct_block_copy_c (int16_t *block, uint8_t * dest, int stride); -static void idct_block_add_c (int16_t *block, uint8_t * dest, int stride); +void (* mpeg2_idct_copy) (int16_t * block, uint8_t * dest, int stride); +void (* mpeg2_idct_add) (int16_t * block, uint8_t * dest, int stride); static uint8_t clip_lut[1024]; #define CLIP(i) ((clip_lut+384)[ (i)]) -void idct_init (void) -{ -#ifdef ARCH_X86 - if (config.flags & MM_ACCEL_X86_MMXEXT) { - fprintf (stderr, "Using MMXEXT for IDCT transform\n"); - idct_block_copy = idct_block_copy_mmxext; - idct_block_add = idct_block_add_mmxext; - idct_mmx_init (); - } else if (config.flags & MM_ACCEL_X86_MMX) { - fprintf (stderr, "Using MMX for IDCT transform\n"); - idct_block_copy = idct_block_copy_mmx; - idct_block_add = idct_block_add_mmx; - idct_mmx_init (); - } else -#endif -#ifdef LIBMPEG2_MLIB - if (config.flags & MM_ACCEL_MLIB) { - fprintf (stderr, "Using mlib for IDCT transform\n"); - idct_block_copy = idct_block_copy_mlib; - idct_block_add = idct_block_add_mlib; - } else -#endif -#ifdef ENABLE_ALTIVEC - if (config.flags & MM_ACCEL_PPC_ALTIVEC) { - fprintf (stderr, "Using altivec for IDCT transform\n"); - idct_block_copy = idct_block_copy_altivec; - idct_block_add = idct_block_add_altivec; - idct_altivec_init (); - } else -#endif - { - int i; - - fprintf (stderr, "No accelerated IDCT transform found\n"); - idct_block_copy = idct_block_copy_c; - idct_block_add = idct_block_add_c; - for (i = -384; i < 640; i++) - clip_lut[i+384] = (i < 0) ? 0 : ((i > 255) ? 255 : i); - } -} - /* row (horizontal) IDCT * * 7 pi 1 @@ -243,7 +202,7 @@ static void inline idct_col (int16_t *block) block[8*7] = (x7 - x1) >> 14; } -void idct_block_copy_c (int16_t * block, uint8_t * dest, int stride) +static void mpeg2_idct_copy_c (int16_t * block, uint8_t * dest, int stride) { int i; @@ -269,7 +228,7 @@ void idct_block_copy_c (int16_t * block, uint8_t * dest, int stride) } while (--i); } -void idct_block_add_c (int16_t * block, uint8_t * dest, int stride) +static void mpeg2_idct_add_c (int16_t * block, uint8_t * dest, int stride) { int i; @@ -294,3 +253,53 @@ void idct_block_add_c (int16_t * block, uint8_t * dest, int stride) block += 8; } while (--i); } + +void mpeg2_idct_init (uint32_t mm_accel) +{ +#ifdef ARCH_X86 + if (mm_accel & MM_ACCEL_X86_MMXEXT) { + fprintf (stderr, "Using MMXEXT for IDCT transform\n"); + mpeg2_idct_copy = mpeg2_idct_copy_mmxext; + mpeg2_idct_add = mpeg2_idct_add_mmxext; + mpeg2_idct_mmx_init (); + } else if (mm_accel & MM_ACCEL_X86_MMX) { + fprintf (stderr, "Using MMX for IDCT transform\n"); + mpeg2_idct_copy = mpeg2_idct_copy_mmx; + mpeg2_idct_add = mpeg2_idct_add_mmx; + mpeg2_idct_mmx_init (); + } else +#endif +#ifdef ARCH_PPC + if (mm_accel & MM_ACCEL_PPC_ALTIVEC) { + fprintf (stderr, "Using altivec for IDCT transform\n"); + mpeg2_idct_copy = mpeg2_idct_copy_altivec; + mpeg2_idct_add = mpeg2_idct_add_altivec; + mpeg2_idct_altivec_init (); + } else +#endif +#ifdef LIBMPEG2_MLIB + if (mm_accel & MM_ACCEL_MLIB) { + char * env_var; + + env_var = getenv ("MLIB_NON_IEEE"); + + if (env_var == NULL) { + fprintf (stderr, "Using mlib for IDCT transform\n"); + mpeg2_idct_add = mpeg2_idct_add_mlib; + } else { + fprintf (stderr, "Using non-IEEE mlib for IDCT transform\n"); + mpeg2_idct_add = mpeg2_idct_add_mlib_non_ieee; + } + mpeg2_idct_copy = mpeg2_idct_copy_mlib_non_ieee; + } else +#endif + { + int i; + + fprintf (stderr, "No accelerated IDCT transform found\n"); + mpeg2_idct_copy = mpeg2_idct_copy_c; + mpeg2_idct_add = mpeg2_idct_add_c; + for (i = -384; i < 640; i++) + clip_lut[i+384] = (i < 0) ? 0 : ((i > 255) ? 255 : i); + } +} |