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annotate src/audio/SDL_mixer_MMX.c @ 4593:3892fe2f6537

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Fixed so many things. See the changelog listed below. 1. Use SDL_X11_HAVE_XRENDER to check for RENDER at runtime. 2. Added lots of comments. 3. Added checks and lots of calls to SDL_SetError(). 4. Fixed X11_CreateTexture() so that the pixmap and image created are for the format specified by the user and not the window format. This is only for the RENDER case. 5. The above change required that functions to convert SDL pixel format enums to Visuals and XRenderPictFormats be added. 6. Fixed lots of 'style' issues.
author Sunny Sachanandani <sunnysachanandani@gmail.com>
date Sat, 17 Jul 2010 15:38:24 +0530
parents f7b03b6838cb
children b530ef003506
rev   line source
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d910939febfa Use consistent identifiers for the various platforms we support.
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1 /*
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2 SDL - Simple DirectMedia Layer
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f7b03b6838cb Fixed bug #926
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3 Copyright (C) 1997-2010 Sam Lantinga
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4
d910939febfa Use consistent identifiers for the various platforms we support.
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5 This library is free software; you can redistribute it and/or
d910939febfa Use consistent identifiers for the various platforms we support.
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6 modify it under the terms of the GNU Lesser General Public
d910939febfa Use consistent identifiers for the various platforms we support.
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7 License as published by the Free Software Foundation; either
d910939febfa Use consistent identifiers for the various platforms we support.
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8 version 2.1 of the License, or (at your option) any later version.
d910939febfa Use consistent identifiers for the various platforms we support.
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9
d910939febfa Use consistent identifiers for the various platforms we support.
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10 This library is distributed in the hope that it will be useful,
d910939febfa Use consistent identifiers for the various platforms we support.
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
d910939febfa Use consistent identifiers for the various platforms we support.
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
d910939febfa Use consistent identifiers for the various platforms we support.
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13 Lesser General Public License for more details.
d910939febfa Use consistent identifiers for the various platforms we support.
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14
d910939febfa Use consistent identifiers for the various platforms we support.
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15 You should have received a copy of the GNU Lesser General Public
d910939febfa Use consistent identifiers for the various platforms we support.
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16 License along with this library; if not, write to the Free Software
d910939febfa Use consistent identifiers for the various platforms we support.
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
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24 /*
e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
Sam Lantinga <slouken@libsdl.org>
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25 MMX assembler version of SDL_MixAudio for signed little endian 16 bit samples and signed 8 bit samples
e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
Sam Lantinga <slouken@libsdl.org>
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26 Copyright 2002 Stephane Marchesin (stephane.marchesin@wanadoo.fr)
e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
Sam Lantinga <slouken@libsdl.org>
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27 This code is licensed under the LGPL (see COPYING for details)
e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
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28
e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
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29 Assumes buffer size in bytes is a multiple of 16
e3b3130f3af8 Date: Fri, 31 Dec 2004 04:14:09 +0900
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30 Assumes SDL_MIX_MAXVOLUME = 128
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31 */
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32
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33
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34 /***********************************************
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35 * Mixing for 16 bit signed buffers
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36 ***********************************************/
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37
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4d46850be3f6 Merged r5070:5071 from branches/SDL-1.2: forcibly disable buggy MMX mixers.
Ryan C. Gordon <icculus@icculus.org>
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38 #if defined(SDL_BUGGY_MMX_MIXERS) /* buggy, so we're disabling them. --ryan. */
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39 #if defined(__GNUC__) && defined(__i386__) && defined(SDL_ASSEMBLY_ROUTINES)
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40 void
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41 SDL_MixAudio_MMX_S16(char *dst, char *src, unsigned int size, int volume)
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42 {
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43 __asm__ __volatile__(" movl %3,%%eax\n" /* eax = volume */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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44 " movl %2,%%edx\n" /* edx = size */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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45 " shrl $4,%%edx\n" /* process 16 bytes per iteration = 8 samples */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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46 " jz .endS16\n" " pxor %%mm0,%%mm0\n" " movd %%eax,%%mm0\n" " movq %%mm0,%%mm1\n" " psllq $16,%%mm0\n" " por %%mm1,%%mm0\n" " psllq $16,%%mm0\n" " por %%mm1,%%mm0\n" " psllq $16,%%mm0\n" " por %%mm1,%%mm0\n" /* mm0 = vol|vol|vol|vol */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1612
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47 ".align 8\n" " .mixloopS16:\n" " movq (%1),%%mm1\n" /* mm1 = a|b|c|d */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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48 " movq %%mm1,%%mm2\n" /* mm2 = a|b|c|d */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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49 " movq 8(%1),%%mm4\n" /* mm4 = e|f|g|h */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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50 /* pré charger le buffer dst dans mm7 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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51 " movq (%0),%%mm7\n" /* mm7 = dst[0] */
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52 /* multiplier par le volume */
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53 " pmullw %%mm0,%%mm1\n" /* mm1 = l(a*v)|l(b*v)|l(c*v)|l(d*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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54 " pmulhw %%mm0,%%mm2\n" /* mm2 = h(a*v)|h(b*v)|h(c*v)|h(d*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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55 " movq %%mm4,%%mm5\n" /* mm5 = e|f|g|h */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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56 " pmullw %%mm0,%%mm4\n" /* mm4 = l(e*v)|l(f*v)|l(g*v)|l(h*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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57 " pmulhw %%mm0,%%mm5\n" /* mm5 = h(e*v)|h(f*v)|h(g*v)|h(h*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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58 " movq %%mm1,%%mm3\n" /* mm3 = l(a*v)|l(b*v)|l(c*v)|l(d*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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59 " punpckhwd %%mm2,%%mm1\n" /* mm1 = a*v|b*v */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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60 " movq %%mm4,%%mm6\n" /* mm6 = l(e*v)|l(f*v)|l(g*v)|l(h*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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61 " punpcklwd %%mm2,%%mm3\n" /* mm3 = c*v|d*v */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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62 " punpckhwd %%mm5,%%mm4\n" /* mm4 = e*f|f*v */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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63 " punpcklwd %%mm5,%%mm6\n" /* mm6 = g*v|h*v */
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64 /* pré charger le buffer dst dans mm5 */
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65 " movq 8(%0),%%mm5\n" /* mm5 = dst[1] */
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66 /* diviser par 128 */
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67 " psrad $7,%%mm1\n" /* mm1 = a*v/128|b*v/128 , 128 = SDL_MIX_MAXVOLUME */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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68 " add $16,%1\n" " psrad $7,%%mm3\n" /* mm3 = c*v/128|d*v/128 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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69 " psrad $7,%%mm4\n" /* mm4 = e*v/128|f*v/128 */
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70 /* mm1 = le sample avec le volume modifié */
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71 " packssdw %%mm1,%%mm3\n" /* mm3 = s(a*v|b*v|c*v|d*v) */
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72 " psrad $7,%%mm6\n" /* mm6= g*v/128|h*v/128 */
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73 " paddsw %%mm7,%%mm3\n" /* mm3 = adjust_volume(src)+dst */
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74 /* mm4 = le sample avec le volume modifié */
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75 " packssdw %%mm4,%%mm6\n" /* mm6 = s(e*v|f*v|g*v|h*v) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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76 " movq %%mm3,(%0)\n" " paddsw %%mm5,%%mm6\n" /* mm6 = adjust_volume(src)+dst */
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77 " movq %%mm6,8(%0)\n"
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78 " add $16,%0\n"
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79 " dec %%edx\n"
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80 " jnz .mixloopS16\n"
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81 " emms\n"
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82 ".endS16:\n"::"r"(dst), "r"(src),
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83 "m"(size), "m"(volume):"eax", "edx", "memory");
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84 }
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85
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86
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87
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88 /*////////////////////////////////////////////// */
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89 /* Mixing for 8 bit signed buffers */
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90 /*////////////////////////////////////////////// */
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91
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92 void
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93 SDL_MixAudio_MMX_S8(char *dst, char *src, unsigned int size, int volume)
539
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94 {
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95 __asm__ __volatile__(" movl %3,%%eax\n" /* eax = volume */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1612
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96 " movd %%eax,%%mm0\n" " movq %%mm0,%%mm1\n" " psllq $16,%%mm0\n" " por %%mm1,%%mm0\n" " psllq $16,%%mm0\n" " por %%mm1,%%mm0\n" " psllq $16,%%mm0\n" " por %%mm1,%%mm0\n" " movl %2,%%edx\n" /* edx = size */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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97 " shr $3,%%edx\n" /* process 8 bytes per iteration = 8 samples */
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98 " cmp $0,%%edx\n" " je .endS8\n" ".align 8\n" " .mixloopS8:\n" " pxor %%mm2,%%mm2\n" /* mm2 = 0 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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99 " movq (%1),%%mm1\n" /* mm1 = a|b|c|d|e|f|g|h */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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100 " movq %%mm1,%%mm3\n" /* mm3 = a|b|c|d|e|f|g|h */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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101 /* on va faire le "sign extension" en faisant un cmp avec 0 qui retourne 1 si <0, 0 si >0 */
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102 " pcmpgtb %%mm1,%%mm2\n" /* mm2 = 11111111|00000000|00000000.... */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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103 " punpckhbw %%mm2,%%mm1\n" /* mm1 = 0|a|0|b|0|c|0|d */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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104 " punpcklbw %%mm2,%%mm3\n" /* mm3 = 0|e|0|f|0|g|0|h */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1612
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105 " movq (%0),%%mm2\n" /* mm2 = destination */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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106 " pmullw %%mm0,%%mm1\n" /* mm1 = v*a|v*b|v*c|v*d */
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107 " add $8,%1\n" " pmullw %%mm0,%%mm3\n" /* mm3 = v*e|v*f|v*g|v*h */
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108 " psraw $7,%%mm1\n" /* mm1 = v*a/128|v*b/128|v*c/128|v*d/128 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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109 " psraw $7,%%mm3\n" /* mm3 = v*e/128|v*f/128|v*g/128|v*h/128 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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110 " packsswb %%mm1,%%mm3\n" /* mm1 = v*a/128|v*b/128|v*c/128|v*d/128|v*e/128|v*f/128|v*g/128|v*h/128 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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111 " paddsb %%mm2,%%mm3\n" /* add to destination buffer */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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112 " movq %%mm3,(%0)\n" /* store back to ram */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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113 " add $8,%0\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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114 " dec %%edx\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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115 " jnz .mixloopS8\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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116 ".endS8:\n"
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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117 " emms\n"::"r"(dst), "r"(src), "m"(size),
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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118 "m"(volume):"eax", "edx", "memory");
539
a9e38f3b8e4d Added MMX audio mixing code for gcc (thanks Stephane!)
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119 }
a9e38f3b8e4d Added MMX audio mixing code for gcc (thanks Stephane!)
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120 #endif
3628
4d46850be3f6 Merged r5070:5071 from branches/SDL-1.2: forcibly disable buggy MMX mixers.
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121
4d46850be3f6 Merged r5070:5071 from branches/SDL-1.2: forcibly disable buggy MMX mixers.
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122 #endif /* SDL_BUGGY_MMX_MIXERS */
4d46850be3f6 Merged r5070:5071 from branches/SDL-1.2: forcibly disable buggy MMX mixers.
Ryan C. Gordon <icculus@icculus.org>
parents: 2859
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123
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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124 /* vi: set ts=4 sw=4 expandtab: */