forked from Green-Sky/tomato
Merge commit 'dec0d4ec4153bf9fc2b78ae6c2df45b6ea8dde7a' as 'external/sdl/SDL'
This commit is contained in:
336
external/sdl/SDL/src/audio/n3ds/SDL_n3dsaudio.c
vendored
Normal file
336
external/sdl/SDL/src/audio/n3ds/SDL_n3dsaudio.c
vendored
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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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#ifdef SDL_AUDIO_DRIVER_N3DS
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/* N3DS Audio driver */
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#include "../SDL_sysaudio.h"
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#include "SDL_n3dsaudio.h"
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#define N3DSAUDIO_DRIVER_NAME "n3ds"
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static dspHookCookie dsp_hook;
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static SDL_AudioDevice *audio_device;
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static void FreePrivateData(SDL_AudioDevice *_this);
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static int FindAudioFormat(SDL_AudioDevice *_this);
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static SDL_INLINE void contextLock(SDL_AudioDevice *_this)
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{
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LightLock_Lock(&_this->hidden->lock);
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}
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static SDL_INLINE void contextUnlock(SDL_AudioDevice *_this)
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{
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LightLock_Unlock(&_this->hidden->lock);
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}
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static void N3DSAUD_LockAudio(SDL_AudioDevice *_this)
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{
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contextLock(_this);
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}
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static void N3DSAUD_UnlockAudio(SDL_AudioDevice *_this)
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{
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contextUnlock(_this);
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}
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static void N3DSAUD_DspHook(DSP_HookType hook)
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{
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if (hook == DSPHOOK_ONCANCEL) {
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contextLock(audio_device);
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audio_device->hidden->isCancelled = SDL_TRUE;
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SDL_AtomicSet(&audio_device->enabled, SDL_FALSE);
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CondVar_Broadcast(&audio_device->hidden->cv);
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contextUnlock(audio_device);
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}
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}
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static void AudioFrameFinished(void *device)
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{
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bool shouldBroadcast = false;
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unsigned i;
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SDL_AudioDevice *_this = (SDL_AudioDevice *)device;
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contextLock(_this);
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for (i = 0; i < NUM_BUFFERS; i++) {
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if (_this->hidden->waveBuf[i].status == NDSP_WBUF_DONE) {
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_this->hidden->waveBuf[i].status = NDSP_WBUF_FREE;
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shouldBroadcast = SDL_TRUE;
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}
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}
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if (shouldBroadcast) {
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CondVar_Broadcast(&_this->hidden->cv);
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}
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contextUnlock(_this);
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}
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static int N3DSAUDIO_OpenDevice(SDL_AudioDevice *_this, const char *devname)
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{
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Result ndsp_init_res;
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Uint8 *data_vaddr;
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float mix[12];
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_this->hidden = (struct SDL_PrivateAudioData *)SDL_calloc(1, sizeof(*_this->hidden));
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if (_this->hidden == NULL) {
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return SDL_OutOfMemory();
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}
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/* Initialise the DSP service */
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ndsp_init_res = ndspInit();
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if (R_FAILED(ndsp_init_res)) {
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if ((R_SUMMARY(ndsp_init_res) == RS_NOTFOUND) && (R_MODULE(ndsp_init_res) == RM_DSP)) {
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SDL_SetError("DSP init failed: dspfirm.cdc missing!");
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} else {
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SDL_SetError("DSP init failed. Error code: 0x%lX", ndsp_init_res);
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}
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return -1;
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}
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/* Initialise internal state */
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LightLock_Init(&_this->hidden->lock);
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CondVar_Init(&_this->hidden->cv);
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if (_this->spec.channels > 2) {
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_this->spec.channels = 2;
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}
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/* Should not happen but better be safe. */
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if (FindAudioFormat(_this) < 0) {
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return SDL_SetError("No supported audio format found.");
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}
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/* Update the fragment size as size in bytes */
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SDL_CalculateAudioSpec(&_this->spec);
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/* Allocate mixing buffer */
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if (_this->spec.size >= SDL_MAX_UINT32 / 2) {
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return SDL_SetError("Mixing buffer is too large.");
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}
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_this->hidden->mixlen = _this->spec.size;
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_this->hidden->mixbuf = (Uint8 *)SDL_malloc(_this->spec.size);
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if (_this->hidden->mixbuf == NULL) {
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return SDL_OutOfMemory();
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}
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SDL_memset(_this->hidden->mixbuf, _this->spec.silence, _this->spec.size);
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data_vaddr = (Uint8 *)linearAlloc(_this->hidden->mixlen * NUM_BUFFERS);
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if (data_vaddr == NULL) {
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return SDL_OutOfMemory();
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}
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SDL_memset(data_vaddr, 0, _this->hidden->mixlen * NUM_BUFFERS);
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DSP_FlushDataCache(data_vaddr, _this->hidden->mixlen * NUM_BUFFERS);
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_this->hidden->nextbuf = 0;
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_this->hidden->channels = _this->spec.channels;
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_this->hidden->samplerate = _this->spec.freq;
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ndspChnReset(0);
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ndspChnSetInterp(0, NDSP_INTERP_LINEAR);
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ndspChnSetRate(0, _this->spec.freq);
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ndspChnSetFormat(0, _this->hidden->format);
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SDL_memset(mix, 0, sizeof(mix));
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mix[0] = 1.0;
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mix[1] = 1.0;
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ndspChnSetMix(0, mix);
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SDL_memset(_this->hidden->waveBuf, 0, sizeof(ndspWaveBuf) * NUM_BUFFERS);
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for (unsigned i = 0; i < NUM_BUFFERS; i++) {
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_this->hidden->waveBuf[i].data_vaddr = data_vaddr;
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_this->hidden->waveBuf[i].nsamples = _this->hidden->mixlen / _this->hidden->bytePerSample;
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data_vaddr += _this->hidden->mixlen;
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}
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/* Setup callback */
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audio_device = _this;
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ndspSetCallback(AudioFrameFinished, _this);
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dspHook(&dsp_hook, N3DSAUD_DspHook);
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return 0;
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}
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static int N3DSAUDIO_CaptureFromDevice(SDL_AudioDevice *_this, void *buffer, int buflen)
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{
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/* Delay to make this sort of simulate real audio input. */
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SDL_Delay((_this->spec.samples * 1000) / _this->spec.freq);
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/* always return a full buffer of silence. */
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SDL_memset(buffer, _this->spec.silence, buflen);
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return buflen;
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}
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static void N3DSAUDIO_PlayDevice(SDL_AudioDevice *_this)
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{
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size_t nextbuf;
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size_t sampleLen;
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contextLock(_this);
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nextbuf = _this->hidden->nextbuf;
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sampleLen = _this->hidden->mixlen;
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if (_this->hidden->isCancelled ||
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_this->hidden->waveBuf[nextbuf].status != NDSP_WBUF_FREE) {
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contextUnlock(_this);
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return;
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}
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_this->hidden->nextbuf = (nextbuf + 1) % NUM_BUFFERS;
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contextUnlock(_this);
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SDL_memcpy((void *)_this->hidden->waveBuf[nextbuf].data_vaddr,
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_this->hidden->mixbuf, sampleLen);
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DSP_FlushDataCache(_this->hidden->waveBuf[nextbuf].data_vaddr, sampleLen);
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ndspChnWaveBufAdd(0, &_this->hidden->waveBuf[nextbuf]);
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}
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static void N3DSAUDIO_WaitDevice(SDL_AudioDevice *_this)
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{
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contextLock(_this);
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while (!_this->hidden->isCancelled &&
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_this->hidden->waveBuf[_this->hidden->nextbuf].status != NDSP_WBUF_FREE) {
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CondVar_Wait(&_this->hidden->cv, &_this->hidden->lock);
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}
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contextUnlock(_this);
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}
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static Uint8 *N3DSAUDIO_GetDeviceBuf(SDL_AudioDevice *_this)
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{
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return _this->hidden->mixbuf;
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}
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static void N3DSAUDIO_CloseDevice(SDL_AudioDevice *_this)
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{
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contextLock(_this);
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dspUnhook(&dsp_hook);
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ndspSetCallback(NULL, NULL);
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if (!_this->hidden->isCancelled) {
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ndspChnReset(0);
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SDL_memset(_this->hidden->waveBuf, 0, sizeof(ndspWaveBuf) * NUM_BUFFERS);
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CondVar_Broadcast(&_this->hidden->cv);
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}
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contextUnlock(_this);
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ndspExit();
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FreePrivateData(_this);
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}
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static void N3DSAUDIO_ThreadInit(SDL_AudioDevice *_this)
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{
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s32 current_priority;
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svcGetThreadPriority(¤t_priority, CUR_THREAD_HANDLE);
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current_priority--;
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/* 0x18 is reserved for video, 0x30 is the default for main thread */
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current_priority = SDL_clamp(current_priority, 0x19, 0x2F);
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svcSetThreadPriority(CUR_THREAD_HANDLE, current_priority);
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}
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static SDL_bool N3DSAUDIO_Init(SDL_AudioDriverImpl *impl)
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{
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/* Set the function pointers */
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impl->OpenDevice = N3DSAUDIO_OpenDevice;
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impl->PlayDevice = N3DSAUDIO_PlayDevice;
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impl->WaitDevice = N3DSAUDIO_WaitDevice;
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impl->GetDeviceBuf = N3DSAUDIO_GetDeviceBuf;
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impl->CloseDevice = N3DSAUDIO_CloseDevice;
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impl->ThreadInit = N3DSAUDIO_ThreadInit;
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impl->LockDevice = N3DSAUD_LockAudio;
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impl->UnlockDevice = N3DSAUD_UnlockAudio;
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impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
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/* Should be possible, but micInit would fail */
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impl->HasCaptureSupport = SDL_FALSE;
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impl->CaptureFromDevice = N3DSAUDIO_CaptureFromDevice;
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return SDL_TRUE; /* this audio target is available. */
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}
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AudioBootStrap N3DSAUDIO_bootstrap = {
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N3DSAUDIO_DRIVER_NAME,
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"SDL N3DS audio driver",
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N3DSAUDIO_Init,
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0
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};
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/**
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* Cleans up all allocated memory, safe to call with null pointers
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*/
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static void FreePrivateData(SDL_AudioDevice *_this)
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{
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if (!_this->hidden) {
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return;
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}
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if (_this->hidden->waveBuf[0].data_vaddr) {
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linearFree((void *)_this->hidden->waveBuf[0].data_vaddr);
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}
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if (_this->hidden->mixbuf) {
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SDL_free(_this->hidden->mixbuf);
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_this->hidden->mixbuf = NULL;
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}
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SDL_free(_this->hidden);
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_this->hidden = NULL;
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}
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static int FindAudioFormat(SDL_AudioDevice *_this)
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{
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SDL_AudioFormat test_format;
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const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(_this->spec.format);
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while ((test_format = *(closefmts++)) != 0) {
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_this->spec.format = test_format;
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switch (test_format) {
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case SDL_AUDIO_S8:
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/* Signed 8-bit audio supported */
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_this->hidden->format = (_this->spec.channels == 2) ? NDSP_FORMAT_STEREO_PCM8 : NDSP_FORMAT_MONO_PCM8;
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_this->hidden->isSigned = 1;
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_this->hidden->bytePerSample = _this->spec.channels;
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return 0;
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case SDL_AUDIO_S16:
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/* Signed 16-bit audio supported */
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_this->hidden->format = (_this->spec.channels == 2) ? NDSP_FORMAT_STEREO_PCM16 : NDSP_FORMAT_MONO_PCM16;
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_this->hidden->isSigned = 1;
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_this->hidden->bytePerSample = _this->spec.channels * 2;
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return 0;
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}
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}
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return -1;
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}
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#endif /* SDL_AUDIO_DRIVER_N3DS */
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46
external/sdl/SDL/src/audio/n3ds/SDL_n3dsaudio.h
vendored
Normal file
46
external/sdl/SDL/src/audio/n3ds/SDL_n3dsaudio.h
vendored
Normal file
@ -0,0 +1,46 @@
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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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||||
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.
|
||||
*/
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#ifndef SDL_n3dsaudio_h
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#define SDL_n3dsaudio_h
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#include <3ds.h>
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#define NUM_BUFFERS 2 /* -- Don't lower this! */
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struct SDL_PrivateAudioData
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{
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/* Speaker data */
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Uint8 *mixbuf;
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Uint32 mixlen;
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Uint32 format;
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Uint32 samplerate;
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Uint32 channels;
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Uint8 bytePerSample;
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Uint32 isSigned;
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Uint32 nextbuf;
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ndspWaveBuf waveBuf[NUM_BUFFERS];
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LightLock lock;
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CondVar cv;
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SDL_bool isCancelled;
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};
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#endif /* SDL_n3dsaudio_h */
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Reference in New Issue
Block a user