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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5131 | clevermous | 1 | |
| 2 | #include "SDL_audio.h" |
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| 3 | #include "SDL_byteorder.h" |
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| 4 | #include "quakedef.h" |
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| 5 | |||
| 6 | |||
| 7 | static int snd_inited; |
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| 8 | |||
| 9 | |||
| 10 | extern int desired_bits; |
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| 11 | |||
| 12 | |||
| 13 | { |
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| 14 | if ( shm ) { |
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| 15 | shm->buffer = stream; |
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| 16 | shm->samplepos += len/(shm->samplebits/8)/2; |
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| 17 | // Check for samplepos overflow? |
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| 18 | S_PaintChannels (shm->samplepos); |
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| 19 | } |
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| 20 | } |
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| 21 | |||
| 22 | |||
| 23 | { |
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| 24 | SDL_AudioSpec desired, obtained; |
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| 25 | |||
| 26 | |||
| 27 | |||
| 28 | |||
| 29 | desired.freq = desired_speed; |
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| 30 | switch (desired_bits) { |
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| 31 | case 8: |
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| 32 | desired.format = AUDIO_U8; |
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| 33 | break; |
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| 34 | case 16: |
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| 35 | if ( SDL_BYTEORDER == SDL_BIG_ENDIAN ) |
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| 36 | desired.format = AUDIO_S16MSB; |
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| 37 | else |
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| 38 | desired.format = AUDIO_S16LSB; |
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| 39 | break; |
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| 40 | default: |
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| 41 | Con_Printf("Unknown number of audio bits: %d\n", |
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| 42 | desired_bits); |
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| 43 | return 0; |
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| 44 | } |
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| 45 | desired.channels = 2; |
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| 46 | desired.samples = 512; |
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| 47 | desired.callback = paint_audio; |
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| 48 | |||
| 49 | |||
| 50 | if ( SDL_OpenAudio(&desired, &obtained) < 0 ) { |
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| 51 | Con_Printf("Couldn't open SDL audio: %s\n", SDL_GetError()); |
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| 52 | return 0; |
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| 53 | } |
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| 54 | |||
| 55 | |||
| 56 | switch (obtained.format) { |
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| 57 | case AUDIO_U8: |
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| 58 | /* Supported */ |
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| 59 | break; |
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| 60 | case AUDIO_S16LSB: |
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| 61 | case AUDIO_S16MSB: |
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| 62 | if ( ((obtained.format == AUDIO_S16LSB) && |
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| 63 | (SDL_BYTEORDER == SDL_LIL_ENDIAN)) || |
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| 64 | ((obtained.format == AUDIO_S16MSB) && |
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| 65 | (SDL_BYTEORDER == SDL_BIG_ENDIAN)) ) { |
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| 66 | /* Supported */ |
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| 67 | break; |
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| 68 | } |
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| 69 | /* Unsupported, fall through */; |
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| 70 | default: |
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| 71 | /* Not supported -- force SDL to do our bidding */ |
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| 72 | SDL_CloseAudio(); |
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| 73 | if ( SDL_OpenAudio(&desired, NULL) < 0 ) { |
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| 74 | Con_Printf("Couldn't open SDL audio: %s\n", |
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| 75 | SDL_GetError()); |
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| 76 | return 0; |
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| 77 | } |
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| 78 | memcpy(&obtained, &desired, sizeof(desired)); |
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| 79 | break; |
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| 80 | } |
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| 81 | SDL_PauseAudio(0); |
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| 82 | |||
| 83 | |||
| 84 | shm = &the_shm; |
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| 85 | shm->splitbuffer = 0; |
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| 86 | shm->samplebits = (obtained.format & 0xFF); |
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| 87 | shm->speed = obtained.freq; |
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| 88 | shm->channels = obtained.channels; |
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| 89 | shm->samples = obtained.samples*shm->channels; |
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| 90 | shm->samplepos = 0; |
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| 91 | shm->submission_chunk = 1; |
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| 92 | shm->buffer = NULL; |
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| 93 | |||
| 94 | |||
| 95 | return 1; |
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| 96 | } |
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| 97 | |||
| 98 | |||
| 99 | { |
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| 100 | return shm->samplepos; |
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| 101 | } |
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| 102 | |||
| 103 | |||
| 104 | { |
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| 105 | if (snd_inited) |
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| 106 | { |
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| 107 | SDL_CloseAudio(); |
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| 108 | snd_inited = 0; |
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| 109 | } |
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| 110 | } |
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| 111 |