forked from Green-Sky/tomato
Merge commit 'dec0d4ec4153bf9fc2b78ae6c2df45b6ea8dde7a' as 'external/sdl/SDL'
This commit is contained in:
172
external/sdl/SDL/src/audio/ps2/SDL_ps2audio.c
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172
external/sdl/SDL/src/audio/ps2/SDL_ps2audio.c
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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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/* Output audio to nowhere... */
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#include "../SDL_audio_c.h"
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#include "SDL_ps2audio.h"
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#include <kernel.h>
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#include <audsrv.h>
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#include <ps2_audio_driver.h>
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/* The tag name used by PS2 audio */
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#define PS2AUDIO_DRIVER_NAME "ps2"
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static int PS2AUDIO_OpenDevice(SDL_AudioDevice *_this, const char *devname)
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{
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int i, mixlen;
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struct audsrv_fmt_t format;
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_this->hidden = (struct SDL_PrivateAudioData *)
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SDL_malloc(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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SDL_zerop(_this->hidden);
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/* These are the native supported audio PS2 configs */
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switch (_this->spec.freq) {
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case 11025:
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case 12000:
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case 22050:
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case 24000:
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case 32000:
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case 44100:
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case 48000:
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_this->spec.freq = _this->spec.freq;
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break;
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default:
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_this->spec.freq = 48000;
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break;
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}
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_this->spec.samples = 512;
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_this->spec.channels = _this->spec.channels == 1 ? 1 : 2;
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_this->spec.format = _this->spec.format == SDL_AUDIO_S8 ? SDL_AUDIO_S8 : SDL_AUDIO_S16;
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SDL_CalculateAudioSpec(&_this->spec);
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format.bits = _this->spec.format == SDL_AUDIO_S8 ? 8 : 16;
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format.freq = _this->spec.freq;
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format.channels = _this->spec.channels;
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_this->hidden->channel = audsrv_set_format(&format);
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audsrv_set_volume(MAX_VOLUME);
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if (_this->hidden->channel < 0) {
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SDL_aligned_free(_this->hidden->rawbuf);
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_this->hidden->rawbuf = NULL;
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return SDL_SetError("Couldn't reserve hardware channel");
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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 the mixing buffer. Its size and starting address must
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be a multiple of 64 bytes. Our sample count is already a multiple of
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64, so spec->size should be a multiple of 64 as well. */
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mixlen = _this->spec.size * NUM_BUFFERS;
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_this->hidden->rawbuf = (Uint8 *)SDL_aligned_alloc(64, mixlen);
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if (_this->hidden->rawbuf == NULL) {
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return SDL_SetError("Couldn't allocate mixing buffer");
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}
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SDL_memset(_this->hidden->rawbuf, 0, mixlen);
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for (i = 0; i < NUM_BUFFERS; i++) {
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_this->hidden->mixbufs[i] = &_this->hidden->rawbuf[i * _this->spec.size];
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}
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_this->hidden->next_buffer = 0;
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return 0;
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}
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static void PS2AUDIO_PlayDevice(SDL_AudioDevice *_this)
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{
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uint8_t *mixbuf = _this->hidden->mixbufs[_this->hidden->next_buffer];
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audsrv_play_audio((char *)mixbuf, _this->spec.size);
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_this->hidden->next_buffer = (_this->hidden->next_buffer + 1) % NUM_BUFFERS;
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}
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/* This function waits until it is possible to write a full sound buffer */
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static void PS2AUDIO_WaitDevice(SDL_AudioDevice *_this)
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{
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audsrv_wait_audio(_this->spec.size);
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}
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static Uint8 *PS2AUDIO_GetDeviceBuf(SDL_AudioDevice *_this)
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{
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return _this->hidden->mixbufs[_this->hidden->next_buffer];
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}
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static void PS2AUDIO_CloseDevice(SDL_AudioDevice *_this)
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{
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if (_this->hidden->channel >= 0) {
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audsrv_stop_audio();
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_this->hidden->channel = -1;
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}
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if (_this->hidden->rawbuf != NULL) {
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SDL_aligned_free(_this->hidden->rawbuf);
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_this->hidden->rawbuf = NULL;
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}
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}
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static void PS2AUDIO_ThreadInit(SDL_AudioDevice *_this)
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{
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/* Increase the priority of this audio thread by 1 to put it
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ahead of other SDL threads. */
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int32_t thid;
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ee_thread_status_t status;
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thid = GetThreadId();
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if (ReferThreadStatus(GetThreadId(), &status) == 0) {
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ChangeThreadPriority(thid, status.current_priority - 1);
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}
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}
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static void PS2AUDIO_Deinitialize(void)
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{
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deinit_audio_driver();
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}
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static SDL_bool PS2AUDIO_Init(SDL_AudioDriverImpl *impl)
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{
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if (init_audio_driver() < 0) {
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return SDL_FALSE;
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}
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/* Set the function pointers */
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impl->OpenDevice = PS2AUDIO_OpenDevice;
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impl->PlayDevice = PS2AUDIO_PlayDevice;
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impl->WaitDevice = PS2AUDIO_WaitDevice;
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impl->GetDeviceBuf = PS2AUDIO_GetDeviceBuf;
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impl->CloseDevice = PS2AUDIO_CloseDevice;
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impl->ThreadInit = PS2AUDIO_ThreadInit;
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impl->Deinitialize = PS2AUDIO_Deinitialize;
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impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
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return SDL_TRUE; /* this audio target is available. */
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}
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AudioBootStrap PS2AUDIO_bootstrap = {
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"ps2", "PS2 audio driver", PS2AUDIO_Init, SDL_FALSE
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};
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42
external/sdl/SDL/src/audio/ps2/SDL_ps2audio.h
vendored
Normal file
42
external/sdl/SDL/src/audio/ps2/SDL_ps2audio.h
vendored
Normal file
@ -0,0 +1,42 @@
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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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|
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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
|
||||
in a product, an acknowledgment in the product documentation would be
|
||||
appreciated but is not required.
|
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2. Altered source versions must be plainly marked as such, and must not be
|
||||
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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#ifndef SDL_ps2audio_h_
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#define SDL_ps2audio_h_
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#include "../SDL_sysaudio.h"
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#define NUM_BUFFERS 2
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struct SDL_PrivateAudioData
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{
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/* The hardware output channel. */
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int channel;
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/* The raw allocated mixing buffer. */
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Uint8 *rawbuf;
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/* Individual mixing buffers. */
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Uint8 *mixbufs[NUM_BUFFERS];
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/* Index of the next available mixing buffer. */
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int next_buffer;
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};
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#endif /* SDL_ps2audio_h_ */
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