Initial Commit

thirdparty/SDL3-3.4.0/src/audio/ngage/SDL_ngageaudio.c

@@ -0,0 +1,103 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_NGAGE
+
+#include "../SDL_sysaudio.h"
+#include "SDL_ngageaudio.h"
+
+static SDL_AudioDevice *devptr = NULL;
+
+SDL_AudioDevice *NGAGE_GetAudioDeviceAddr()
+{
+    return devptr;
+}
+
+static bool NGAGEAUDIO_OpenDevice(SDL_AudioDevice *device)
+{
+    SDL_PrivateAudioData *phdata = SDL_calloc(1, sizeof(SDL_PrivateAudioData));
+    if (!phdata) {
+        SDL_OutOfMemory();
+        return false;
+    }
+    device->hidden = phdata;
+
+    phdata->buffer = SDL_calloc(1, device->buffer_size);
+    if (!phdata->buffer) {
+        SDL_OutOfMemory();
+        SDL_free(phdata);
+        return false;
+    }
+    devptr = device;
+
+    // Since the phone can change the sample rate during a phone call,
+    // we set the sample rate to 8KHz to be safe.  Even though it
+    // might be possible to adjust the sample rate dynamically, it's
+    // not supported by the current implementation.
+
+    device->spec.format = SDL_AUDIO_S16LE;
+    device->spec.channels = 1;
+    device->spec.freq = 8000;
+
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    return true;
+}
+
+static Uint8 *NGAGEAUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    SDL_PrivateAudioData *phdata = (SDL_PrivateAudioData *)device->hidden;
+    if (!phdata) {
+        *buffer_size = 0;
+        return 0;
+    }
+
+    *buffer_size = device->buffer_size;
+    return phdata->buffer;
+}
+
+static void NGAGEAUDIO_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        SDL_free(device->hidden->buffer);
+        SDL_free(device->hidden);
+    }
+
+    return;
+}
+
+static bool NGAGEAUDIO_Init(SDL_AudioDriverImpl *impl)
+{
+    impl->OpenDevice = NGAGEAUDIO_OpenDevice;
+    impl->GetDeviceBuf = NGAGEAUDIO_GetDeviceBuf;
+    impl->CloseDevice = NGAGEAUDIO_CloseDevice;
+
+    impl->ProvidesOwnCallbackThread = true;
+    impl->OnlyHasDefaultPlaybackDevice = true;
+
+    return true;
+}
+
+AudioBootStrap NGAGEAUDIO_bootstrap = { "N-Gage", "N-Gage audio driver", NGAGEAUDIO_Init, false };
+
+#endif // SDL_AUDIO_DRIVER_NGAGE