diff options
Diffstat (limited to 'source/3rd-party/SDL2/src/audio/psp/SDL_pspaudio.c')
| -rw-r--r-- | source/3rd-party/SDL2/src/audio/psp/SDL_pspaudio.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/source/3rd-party/SDL2/src/audio/psp/SDL_pspaudio.c b/source/3rd-party/SDL2/src/audio/psp/SDL_pspaudio.c new file mode 100644 index 0000000..3e7b8e1 --- /dev/null +++ b/source/3rd-party/SDL2/src/audio/psp/SDL_pspaudio.c @@ -0,0 +1,181 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2018 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" + +#if SDL_AUDIO_DRIVER_PSP + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <malloc.h> + +#include "SDL_audio.h" +#include "SDL_error.h" +#include "SDL_timer.h" +#include "../SDL_audio_c.h" +#include "../SDL_audiodev_c.h" +#include "../SDL_sysaudio.h" +#include "SDL_pspaudio.h" + +#include <pspaudio.h> +#include <pspthreadman.h> + +/* The tag name used by PSP audio */ +#define PSPAUDIO_DRIVER_NAME "psp" + +static int +PSPAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture) +{ + int format, mixlen, i; + this->hidden = (struct SDL_PrivateAudioData *) + SDL_malloc(sizeof(*this->hidden)); + if (this->hidden == NULL) { + return SDL_OutOfMemory(); + } + SDL_zerop(this->hidden); + switch (this->spec.format & 0xff) { + case 8: + case 16: + this->spec.format = AUDIO_S16LSB; + break; + default: + return SDL_SetError("Unsupported audio format"); + } + + /* The sample count must be a multiple of 64. */ + this->spec.samples = PSP_AUDIO_SAMPLE_ALIGN(this->spec.samples); + this->spec.freq = 44100; + + /* Update the fragment size as size in bytes. */ + SDL_CalculateAudioSpec(&this->spec); + + /* Allocate the mixing buffer. Its size and starting address must + be a multiple of 64 bytes. Our sample count is already a multiple of + 64, so spec->size should be a multiple of 64 as well. */ + mixlen = this->spec.size * NUM_BUFFERS; + this->hidden->rawbuf = (Uint8 *) memalign(64, mixlen); + if (this->hidden->rawbuf == NULL) { + return SDL_SetError("Couldn't allocate mixing buffer"); + } + + /* Setup the hardware channel. */ + if (this->spec.channels == 1) { + format = PSP_AUDIO_FORMAT_MONO; + } else { + this->spec.channels = 2; + format = PSP_AUDIO_FORMAT_STEREO; + } + this->hidden->channel = sceAudioChReserve(PSP_AUDIO_NEXT_CHANNEL, this->spec.samples, format); + if (this->hidden->channel < 0) { + free(this->hidden->rawbuf); + this->hidden->rawbuf = NULL; + return SDL_SetError("Couldn't reserve hardware channel"); + } + + memset(this->hidden->rawbuf, 0, mixlen); + for (i = 0; i < NUM_BUFFERS; i++) { + this->hidden->mixbufs[i] = &this->hidden->rawbuf[i * this->spec.size]; + } + + this->hidden->next_buffer = 0; + return 0; +} + +static void PSPAUDIO_PlayDevice(_THIS) +{ + Uint8 *mixbuf = this->hidden->mixbufs[this->hidden->next_buffer]; + + if (this->spec.channels == 1) { + sceAudioOutputBlocking(this->hidden->channel, PSP_AUDIO_VOLUME_MAX, mixbuf); + } else { + sceAudioOutputPannedBlocking(this->hidden->channel, PSP_AUDIO_VOLUME_MAX, PSP_AUDIO_VOLUME_MAX, mixbuf); + } + + this->hidden->next_buffer = (this->hidden->next_buffer + 1) % NUM_BUFFERS; +} + +/* This function waits until it is possible to write a full sound buffer */ +static void PSPAUDIO_WaitDevice(_THIS) +{ + /* Because we block when sending audio, there's no need for this function to do anything. */ +} +static Uint8 *PSPAUDIO_GetDeviceBuf(_THIS) +{ + return this->hidden->mixbufs[this->hidden->next_buffer]; +} + +static void PSPAUDIO_CloseDevice(_THIS) +{ + if (this->hidden->channel >= 0) { + sceAudioChRelease(this->hidden->channel); + } + free(this->hidden->rawbuf); /* this uses memalign(), not SDL_malloc(). */ + SDL_free(this->hidden); +} + +static void PSPAUDIO_ThreadInit(_THIS) +{ + /* Increase the priority of this audio thread by 1 to put it + ahead of other SDL threads. */ + SceUID thid; + SceKernelThreadInfo status; + thid = sceKernelGetThreadId(); + status.size = sizeof(SceKernelThreadInfo); + if (sceKernelReferThreadStatus(thid, &status) == 0) { + sceKernelChangeThreadPriority(thid, status.currentPriority - 1); + } +} + + +static int +PSPAUDIO_Init(SDL_AudioDriverImpl * impl) +{ + /* Set the function pointers */ + impl->OpenDevice = PSPAUDIO_OpenDevice; + impl->PlayDevice = PSPAUDIO_PlayDevice; + impl->WaitDevice = PSPAUDIO_WaitDevice; + impl->GetDeviceBuf = PSPAUDIO_GetDeviceBuf; + impl->CloseDevice = PSPAUDIO_CloseDevice; + impl->ThreadInit = PSPAUDIO_ThreadInit; + + /* PSP audio device */ + impl->OnlyHasDefaultOutputDevice = 1; +/* + impl->HasCaptureSupport = 1; + + impl->OnlyHasDefaultCaptureDevice = 1; +*/ + /* + impl->DetectDevices = DSOUND_DetectDevices; + impl->Deinitialize = DSOUND_Deinitialize; + */ + return 1; /* this audio target is available. */ +} + +AudioBootStrap PSPAUDIO_bootstrap = { + "psp", "PSP audio driver", PSPAUDIO_Init, 0 +}; + + /* SDL_AUDI */ + +#endif /* SDL_AUDIO_DRIVER_PSP */ + +/* vi: set ts=4 sw=4 expandtab: */ |