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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 8210 | maxcodehac | 1 | #include "SDL_audio.h" |
| 9288 | turbocat | 2 | #include |
| 3 | #include |
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| 8210 | maxcodehac | 4 | #include |
| 5 | #include |
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| 6 | #include |
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| 7 | #include |
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| 8 | |||
| 9 | static void GetNotify(__u32* event) |
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| 10 | { |
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| 11 | __asm__("int $0x40" :: "a"(68),"b"(14),"c"(event)); |
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| 12 | } |
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| 13 | static int CreateThread(void* fn, char* p_stack) |
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| 14 | { |
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| 15 | int res; |
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| 16 | __asm__("int $0x40" : "=a"(res) : "a"(51),"b"(1),"c"(fn),"d"(p_stack)); |
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| 17 | return res; |
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| 18 | } |
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| 19 | static char pinfo[1024]; |
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| 20 | static int GetProcessInfo(int slot) |
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| 21 | { |
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| 22 | int res; |
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| 23 | __asm__("int $0x40" : "=a"(res) : "a"(9),"b"(pinfo),"c"(slot)); |
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| 24 | return res; |
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| 25 | } |
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| 26 | static void ActivateWnd(int slot) |
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| 27 | { |
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| 28 | __asm__("int $0x40" :: "a"(18),"b"(3),"c"(slot)); |
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| 29 | } |
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| 30 | static void Yield(void) |
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| 31 | { |
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| 32 | __asm__("int $0x40" :: "a"(68),"b"(1)); |
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| 33 | } |
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| 34 | |||
| 35 | static int bInitialized=0; |
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| 36 | static SNDBUF hBuff=0; |
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| 37 | static char* data=NULL; |
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| 38 | static int audio_tid=0; |
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| 39 | static int main_slot; |
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| 40 | static __u32 main_tid; |
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| 41 | static char audio_thread_stack[40960]; |
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| 42 | static __u32 used_format=0; |
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| 43 | static volatile int mix_size=0; |
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| 44 | |||
| 45 | static void (*callback)(void* userdata, Uint8* stream, int len); |
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| 46 | static void* userdata; |
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| 47 | |||
| 48 | int SDL_AudioInit(const char* driver_name) |
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| 49 | { |
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| 50 | if (bInitialized) |
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| 51 | { |
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| 52 | SDL_SetError("audio already initialized"); |
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| 53 | return -1; |
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| 54 | } |
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| 55 | int ver; |
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| 56 | if (InitSound(&ver)) |
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| 57 | { |
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| 58 | SDL_printf("Warning: cannot load drivers, sound output will be disabled\n"); |
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| 59 | return 0; |
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| 60 | } |
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| 61 | bInitialized = 1; |
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| 62 | return 0; |
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| 63 | } |
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| 64 | |||
| 65 | void SDL_AudioQuit(void) |
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| 66 | { |
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| 67 | } |
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| 68 | |||
| 69 | char* SDL_AudioDriverName(char* namebuf, int maxlen) |
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| 70 | { |
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| 71 | if (!bInitialized) |
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| 72 | return NULL; |
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| 73 | strncpy(namebuf,"KolibriAudio",maxlen); |
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| 74 | return namebuf; |
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| 75 | } |
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| 76 | |||
| 77 | #define AUDIO_SUSPEND 1 |
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| 78 | #define AUDIO_RESUME 2 |
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| 79 | #define AUDIO_DIE 3 |
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| 80 | static volatile int audio_command=0,audio_response=0,bLocked=0,bInCallback=0; |
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| 81 | static void audio_thread(void) |
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| 82 | { |
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| 83 | SDL_printf("audio_thread created\n"); |
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| 84 | int bPaused; |
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| 85 | __u32 event[6]; |
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| 86 | // initialize |
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| 87 | if (CreateBuffer(used_format|PCM_RING, 0, &hBuff)) |
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| 88 | { |
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| 89 | audio_response=1; |
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| 8494 | maxcodehac | 90 | exit(0); |
| 8210 | maxcodehac | 91 | } |
| 92 | GetBufferSize(hBuff, &mix_size); |
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| 93 | SDL_printf("buffer created, size is %d\n",mix_size); |
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| 94 | mix_size >>= 1; |
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| 95 | data = malloc(mix_size); |
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| 96 | audio_response=1; |
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| 8494 | maxcodehac | 97 | if (!data) exit(0); |
| 8210 | maxcodehac | 98 | // wait for resume |
| 99 | while (audio_command!=AUDIO_RESUME) |
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| 100 | Yield(); |
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| 101 | // initialize |
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| 102 | /* bInCallback=1; |
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| 103 | callback(userdata,data,mix_size); |
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| 104 | SetBuffer(hBuff,data,0,mix_size); |
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| 105 | callback(userdata,data,mix_size); |
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| 106 | SetBuffer(hBuff,data,mix_size,mix_size); |
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| 107 | bInCallback=0;*/ |
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| 108 | audio_command=0; |
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| 109 | bPaused=0; |
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| 110 | audio_response=1; |
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| 111 | PlayBuffer(hBuff,0); |
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| 112 | // main loop |
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| 113 | for (;;) |
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| 114 | { |
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| 115 | if (audio_command==AUDIO_RESUME) |
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| 116 | { |
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| 117 | PlayBuffer(hBuff,0); |
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| 118 | audio_command = 0; |
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| 119 | bPaused = 0; |
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| 120 | audio_response = 1; |
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| 121 | } |
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| 122 | else if (audio_command==AUDIO_SUSPEND) |
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| 123 | { |
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| 124 | StopBuffer(hBuff); |
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| 125 | audio_command = 0; |
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| 126 | bPaused = 1; |
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| 127 | audio_response = 1; |
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| 128 | } |
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| 129 | else if (audio_command==AUDIO_DIE) |
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| 130 | { |
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| 131 | audio_response = 1; |
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| 132 | StopBuffer(hBuff); |
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| 133 | DestroyBuffer(hBuff); |
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| 8494 | maxcodehac | 134 | exit(0); |
| 8210 | maxcodehac | 135 | } |
| 136 | else |
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| 137 | { |
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| 138 | GetProcessInfo(main_slot); |
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| 139 | if (pinfo[0x32]==9 || *(__u32*)(pinfo+0x1E)!=main_tid) |
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| 140 | { |
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| 141 | audio_command = AUDIO_DIE; |
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| 142 | continue; |
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| 143 | } |
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| 144 | } |
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| 145 | if (bPaused) |
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| 9288 | turbocat | 146 | delay(5); |
| 8210 | maxcodehac | 147 | else |
| 148 | { |
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| 149 | GetNotify(event); |
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| 150 | if (event[0] != 0xFF000001) |
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| 151 | continue; |
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| 152 | while (bLocked) |
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| 153 | Yield(); |
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| 154 | bInCallback=1; |
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| 155 | callback(userdata,data,mix_size); |
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| 156 | bInCallback=0; |
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| 157 | SetBuffer(hBuff,data,event[3],mix_size); |
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| 158 | } |
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| 159 | } |
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| 160 | } |
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| 161 | |||
| 162 | int SDL_OpenAudio(SDL_AudioSpec* desired, SDL_AudioSpec* obtained) |
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| 163 | { |
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| 164 | if (!bInitialized) |
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| 165 | { |
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| 166 | SDL_SetError("Audio device was not initialized"); |
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| 167 | return -1; |
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| 168 | } |
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| 169 | if (!obtained) |
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| 170 | { |
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| 171 | SDL_SetError("Audio format: software emulation is not supported"); |
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| 172 | return -1; |
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| 173 | } |
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| 174 | if (used_format) |
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| 175 | { |
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| 176 | SDL_SetError("Audio device was already opened"); |
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| 177 | return -1; |
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| 178 | } |
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| 179 | memcpy(obtained,desired,sizeof(SDL_AudioSpec)); |
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| 180 | switch (desired->freq) |
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| 181 | { |
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| 182 | |||
| 183 | #define HANDLE_FREQ(freq,symb) \ |
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| 184 | case freq: \ |
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| 185 | switch (desired->channels) \ |
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| 186 | { \ |
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| 187 | case 1: \ |
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| 188 | switch (desired->format) \ |
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| 189 | { \ |
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| 190 | case AUDIO_U8: \ |
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| 191 | case AUDIO_S8: \ |
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| 192 | used_format = PCM_1_8_##symb; \ |
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| 193 | break; \ |
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| 194 | case AUDIO_U16SYS: \ |
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| 195 | case AUDIO_S16SYS: \ |
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| 196 | used_format = PCM_1_16_##symb; \ |
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| 197 | break; \ |
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| 198 | } \ |
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| 199 | break; \ |
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| 200 | case 2: \ |
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| 201 | switch (desired->format) \ |
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| 202 | { \ |
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| 203 | case AUDIO_U8: \ |
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| 204 | case AUDIO_S8: \ |
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| 205 | used_format = PCM_2_8_##symb; \ |
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| 206 | break; \ |
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| 207 | case AUDIO_U16SYS: \ |
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| 208 | case AUDIO_S16SYS: \ |
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| 209 | used_format = PCM_2_16_##symb; \ |
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| 210 | break; \ |
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| 211 | } \ |
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| 212 | break; \ |
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| 213 | } \ |
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| 214 | break; |
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| 215 | |||
| 216 | HANDLE_FREQ(48000,48); |
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| 217 | HANDLE_FREQ(44100,44); |
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| 218 | HANDLE_FREQ(32000,32); |
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| 219 | HANDLE_FREQ(24000,24); |
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| 220 | HANDLE_FREQ(22050,22); |
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| 221 | HANDLE_FREQ(16000,16); |
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| 222 | HANDLE_FREQ(12000,12); |
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| 223 | HANDLE_FREQ(11025,11); |
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| 224 | HANDLE_FREQ(8000,8); |
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| 225 | } |
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| 226 | if (!used_format) |
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| 227 | { |
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| 228 | SDL_SetError("Unknown audio format"); |
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| 229 | return -1; |
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| 230 | } |
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| 231 | callback=desired->callback; |
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| 232 | userdata=desired->userdata; |
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| 233 | GetProcessInfo(-1); |
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| 234 | main_tid = *(__u32*)(pinfo+0x1E); |
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| 235 | for (main_slot=0;;main_slot++) |
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| 236 | { |
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| 237 | GetProcessInfo(main_slot); |
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| 238 | if (pinfo[0x32]!=9 && *(__u32*)(pinfo+0x1E)==main_tid) |
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| 239 | break; |
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| 240 | } |
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| 241 | audio_tid=CreateThread(audio_thread,audio_thread_stack+40960); |
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| 242 | if (audio_tid<0) |
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| 243 | { |
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| 244 | SDL_SetError("Cannot create audio thread"); |
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| 245 | return -1; |
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| 246 | } |
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| 247 | ActivateWnd(main_slot); |
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| 248 | while (!audio_response) |
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| 249 | Yield(); |
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| 250 | if (!hBuff) |
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| 251 | { |
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| 252 | SDL_SetError("Cannot create audio buffer"); |
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| 253 | return -1; |
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| 254 | } |
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| 255 | if (!data) |
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| 256 | { |
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| 257 | SDL_SetError("Cannot allocate audio buffer"); |
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| 258 | return -1; |
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| 259 | } |
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| 260 | obtained->silence = (desired->format == AUDIO_U8 ? 0x80 : 0); |
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| 261 | obtained->size = mix_size; |
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| 262 | obtained->samples = obtained->size / obtained->channels; |
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| 263 | if (desired->format == AUDIO_U16SYS || desired->format == AUDIO_S16SYS) |
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| 264 | obtained->samples /= 2; |
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| 265 | SDL_printf("obtained size is %d, samples %d\n",obtained->size, |
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| 266 | obtained->samples); |
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| 267 | return 0; |
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| 268 | } |
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| 269 | void SDL_CloseAudio(void) |
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| 270 | { |
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| 271 | if (!audio_tid) return; |
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| 272 | audio_response = 0; |
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| 273 | audio_command = AUDIO_DIE; |
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| 274 | while (!audio_response) |
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| 275 | Yield(); |
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| 276 | free(data); |
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| 277 | used_format = 0; |
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| 278 | } |
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| 279 | |||
| 280 | void SDL_PauseAudio(int pause_on) |
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| 281 | { |
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| 282 | if (!audio_tid) return; |
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| 283 | audio_response = 0; |
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| 284 | audio_command = pause_on?AUDIO_SUSPEND:AUDIO_RESUME; |
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| 285 | while (!audio_response) |
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| 286 | Yield(); |
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| 287 | } |
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| 288 | void SDL_LockAudio(void) |
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| 289 | { |
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| 290 | if (!audio_tid) return; |
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| 291 | bLocked = 1; |
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| 292 | while (bInCallback) |
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| 293 | Yield(); |
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| 294 | } |
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| 295 | void SDL_UnlockAudio(void) |
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| 296 | { |
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| 297 | bLocked = 0; |
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| 298 | } |