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annotate src/audio/SDL_mixer_m68k.c @ 3099:82e60908fab1

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Date: Mon, 23 Mar 2009 09:17:24 +0200 From: "Mike Gorchak" Subject: New QNX patches Please apply patch qnx4.diff, which is attached. What has been done: 1)Added back OpenGL ES renderer for QNX target. Added few corrections to OpenGL ES renderer to let it work under QNX. OpenGL ES renderer do not support textures under QNX, so I think some additional work must be done. 2) Added GL_OES_query_matrix extension to SDL_opengles.h header file, which required by OpenGL ES 1.1 specification. 3) Added attribute clearing at the entrance of function SDL_GL_GetAttribure(). Added error checking into the function SDL_GL_GetAttribure(), because some attributes can't be obtained in OpenGL ES 1.0. 4) Porting testdyngles to OpenGL ES 1.0 (1.1 has glColor4ub() and glColor4f() functions, but 1.0 has glColor4f() only). 5) Added error checking after obtaining attributes using SDL_GL_GetAttribute() function to the testgl2 and testgles. 6) Small correction to testmultiaudio with printing errors. 7) Added software and accelerated OpenGL ES 1.0 support into the QNX GF driver. Please remove ./src/audio/nto directory - it will not be used anymore. Please create ./src/audio/qsa directory and add content of the archive qsa.tar.gz into this directory. I rewrote some sound code, added support for multiple audio cards, enumeration, etc. Added initial support for capture. As far as I can understand SDL 1.3 is not supporting audio capture right now ? Sam, Am I right ? Or audio capture must be supported through the PlayDevice routine ? And last, please put file SDL_gf_opengles.c to the ./src/video/qnxgf directory. It is OpenGL ES 1.1 emulation layer for some functions, which are not supported by OpenGL ES 1.0.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 24 Mar 2009 10:33:12 +0000
parents 99210400e8b9
children efb79807afe1
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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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24 /*
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25 m68k assembly mix routines
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26
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27 Patrice Mandin
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28 */
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29
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30 #if defined(__M68000__) && defined(__GNUC__)
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31 void
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32 SDL_MixAudio_m68k_U8(char *dst, char *src, long len, long volume, char *mix8)
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33 {
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34 __asm__ __volatile__("tstl %2\n" " beqs stoploop_u8\n" "mixloop_u8:\n"
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35 /* Mix a sample */
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36 " moveq #0,%%d0\n" " moveq #0,%%d1\n" " moveb %1@+,%%d0\n" /* d0 = *src++ */
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37 " sub #128,%%d0\n" /* d0 -= 128 */
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38 " muls %3,%%d0\n" /* d0 *= volume (0<=volume<=128) */
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39 " moveb %0@,%%d1\n" /* d1 = *dst */
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40 " asr #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
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41 " add #128,%%d0\n" /* d0 += 128 */
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42 " add %%d1,%%d0\n"
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43 " moveb %4@(%%d0:w),%0@+\n"
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44 /* Loop till done */
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45 " subql #1,%2\n" " bhis mixloop_u8\n" "stoploop_u8:\n": /* no return value */
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46 : /* input */
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47 "a"(dst), "a"(src), "d"(len), "d"(volume), "a"(mix8): /* clobbered registers */
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48 "d0", "d1", "cc", "memory");
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49 }
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50
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51 void
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52 SDL_MixAudio_m68k_S8(char *dst, char *src, long len, long volume)
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53 {
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54 __asm__ __volatile__("tstl %2\n"
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55 " beqs stoploop_s8\n"
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56 " moveq #-128,%%d2\n"
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57 " moveq #127,%%d3\n" "mixloop_s8:\n"
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58 /* Mix a sample */
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59 " moveq #0,%%d0\n" " moveq #0,%%d1\n" " moveb %1@+,%%d0\n" /* d0 = *src++ */
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60 " muls %3,%%d0\n" /* d0 *= volume (0<=volume<=128) */
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61 " moveb %0@,%%d1\n" /* d1 = *dst */
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62 " asr #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
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63 " add %%d1,%%d0\n"
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64 " cmp %%d2,%%d0\n"
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65 " bges lower_limit_s8\n"
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66 " move %%d2,%%d0\n"
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67 "lower_limit_s8:\n"
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68 " cmp %%d3,%%d0\n"
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69 " bles upper_limit_s8\n"
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70 " move %%d3,%%d0\n"
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71 "upper_limit_s8:\n" " moveb %%d0,%0@+\n"
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72 /* Loop till done */
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73 " subql #1,%2\n" " bhis mixloop_s8\n" "stoploop_s8:\n": /* no return value */
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74 : /* input */
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75 "a"(dst), "a"(src), "d"(len), "d"(volume): /* clobbered registers */
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76 "d0", "d1", "d2", "d3", "cc", "memory");
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77 }
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78
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79 void
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80 SDL_MixAudio_m68k_S16MSB(short *dst, short *src, long len, long volume)
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81 {
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82 __asm__ __volatile__("tstl %2\n"
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83 " beqs stoploop_s16msb\n"
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84 " movel #-32768,%%d2\n"
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85 " movel #32767,%%d3\n"
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86 " lsrl #1,%2\n" "mixloop_s16msb:\n"
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87 /* Mix a sample */
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88 " move %1@+,%%d0\n" /* d0 = *src++ */
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89 " muls %3,%%d0\n" /* d0 *= volume (0<=volume<=128) */
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90 " move %0@,%%d1\n" /* d1 = *dst */
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91 " extl %%d1\n" /* extend d1 to 32 bits */
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92 " asrl #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
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93 " addl %%d1,%%d0\n"
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94 " cmpl %%d2,%%d0\n"
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95 " bges lower_limit_s16msb\n"
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96 " move %%d2,%%d0\n"
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97 "lower_limit_s16msb:\n"
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98 " cmpl %%d3,%%d0\n"
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99 " bles upper_limit_s16msb\n"
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100 " move %%d3,%%d0\n"
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101 "upper_limit_s16msb:\n" " move %%d0,%0@+\n"
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102 /* Loop till done */
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103 " subql #1,%2\n" " bhis mixloop_s16msb\n" "stoploop_s16msb:\n": /* no return value */
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104 : /* input */
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105 "a"(dst), "a"(src), "d"(len), "d"(volume): /* clobbered registers */
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106 "d0", "d1", "d2", "d3", "cc", "memory");
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107 }
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108
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109 void
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110 SDL_MixAudio_m68k_S16LSB(short *dst, short *src, long len, long volume)
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111 {
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112 __asm__ __volatile__("tstl %2\n"
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113 " beqs stoploop_s16lsb\n"
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114 " movel #-32768,%%d2\n"
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115 " movel #32767,%%d3\n"
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116 " lsrl #1,%2\n" "mixloop_s16lsb:\n"
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117 /* Mix a sample */
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118 " move %1@+,%%d0\n" /* d0 = *src++ */
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119 " rorw #8,%%d0\n" " muls %3,%%d0\n" /* d0 *= volume (0<=volume<=128) */
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120 " move %0@,%%d1\n" /* d1 = *dst */
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121 " rorw #8,%%d1\n" " extl %%d1\n" /* extend d1 to 32 bits */
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122 " asrl #7,%%d0\n" /* d0 /= 128 (SDL_MIX_MAXVOLUME) */
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123 " addl %%d1,%%d0\n"
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124 " cmpl %%d2,%%d0\n"
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125 " bges lower_limit_s16lsb\n"
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126 " move %%d2,%%d0\n"
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127 "lower_limit_s16lsb:\n"
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128 " cmpl %%d3,%%d0\n"
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129 " bles upper_limit_s16lsb\n"
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130 " move %%d3,%%d0\n"
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131 "upper_limit_s16lsb:\n"
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132 " rorw #8,%%d0\n" " move %%d0,%0@+\n"
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133 /* Loop till done */
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134 " subql #1,%2\n" " bhis mixloop_s16lsb\n" "stoploop_s16lsb:\n": /* no return value */
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135 : /* input */
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136 "a"(dst), "a"(src), "d"(len), "d"(volume): /* clobbered registers */
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137 "d0", "d1", "d2", "d3", "cc", "memory");
633
873c2598f969 Add m68k assembly mixing routines
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parents:
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138 }
873c2598f969 Add m68k assembly mixing routines
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139 #endif
1895
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140 /* vi: set ts=4 sw=4 expandtab: */