Atlas - SDL_ngageaudio.c
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[FILE BEGIN]
1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21
22#include "SDL_internal.h"
23
24#ifdef SDL_AUDIO_DRIVER_NGAGE
25
26#include "../SDL_sysaudio.h"
27#include "SDL_ngageaudio.h"
28
29static SDL_AudioDevice *devptr = NULL;
30
31SDL_AudioDevice *NGAGE_GetAudioDeviceAddr()
32{
33    return devptr;
34}
35
36static bool NGAGEAUDIO_OpenDevice(SDL_AudioDevice *device)
37{
38    SDL_PrivateAudioData *phdata = SDL_calloc(1, sizeof(SDL_PrivateAudioData));
39    if (!phdata) {
40        SDL_OutOfMemory();
41        return false;
42    }
43    device->hidden = phdata;
44
45    phdata->buffer = SDL_calloc(1, device->buffer_size);
46    if (!phdata->buffer) {
47        SDL_OutOfMemory();
48        SDL_free(phdata);
49        return false;
50    }
51    devptr = device;
52
53    // Since the phone can change the sample rate during a phone call,
54    // we set the sample rate to 8KHz to be safe.  Even though it
55    // might be possible to adjust the sample rate dynamically, it's
56    // not supported by the current implementation.
57
58    device->spec.format = SDL_AUDIO_S16LE;
59    device->spec.channels = 1;
60    device->spec.freq = 8000;
61
62    SDL_UpdatedAudioDeviceFormat(device);
63
64    return true;
65}
66
67static Uint8 *NGAGEAUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
68{
69    SDL_PrivateAudioData *phdata = (SDL_PrivateAudioData *)device->hidden;
70    if (!phdata) {
71        *buffer_size = 0;
72        return 0;
73    }
74
75    *buffer_size = device->buffer_size;
76    return phdata->buffer;
77}
78
79static void NGAGEAUDIO_CloseDevice(SDL_AudioDevice *device)
80{
81    if (device->hidden) {
82        SDL_free(device->hidden->buffer);
83        SDL_free(device->hidden);
84    }
85
86    return;
87}
88
89static bool NGAGEAUDIO_Init(SDL_AudioDriverImpl *impl)
90{
91    impl->OpenDevice = NGAGEAUDIO_OpenDevice;
92    impl->GetDeviceBuf = NGAGEAUDIO_GetDeviceBuf;
93    impl->CloseDevice = NGAGEAUDIO_CloseDevice;
94
95    impl->ProvidesOwnCallbackThread = true;
96    impl->OnlyHasDefaultPlaybackDevice = true;
97
98    return true;
99}
100
101AudioBootStrap NGAGEAUDIO_bootstrap = { "N-Gage", "N-Gage audio driver", NGAGEAUDIO_Init, false };
102
103#endif // SDL_AUDIO_DRIVER_NGAGE
104
[FILE END]
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