| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2013 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 <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_audiomem.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 PSPAUD_DRIVER_NAME "psp" |
| |
| static int |
| PSPAUD_OpenDevice(_THIS, 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_memset(this->hidden, 0, sizeof(*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); MOD |
| switch (this->spec.format) { |
| case AUDIO_U8: |
| this->spec.silence = 0x80; |
| break; |
| default: |
| this->spec.silence = 0x00; |
| break; |
| } |
| this->spec.size = SDL_AUDIO_BITSIZE(this->spec.format) / 8; |
| this->spec.size *= this->spec.channels; |
| this->spec.size *= this->spec.samples; |
| |
| //========================================== |
| |
| /* 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 { |
| 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 PSPAUD_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 PSPAUD_WaitDevice(_THIS) |
| { |
| /* Because we block when sending audio, there's no need for this function to do anything. */ |
| } |
| static Uint8 *PSPAUD_GetDeviceBuf(_THIS) |
| { |
| return this->hidden->mixbufs[this->hidden->next_buffer]; |
| } |
| |
| static void PSPAUD_CloseDevice(_THIS) |
| { |
| if (this->hidden->channel >= 0) { |
| sceAudioChRelease(this->hidden->channel); |
| this->hidden->channel = -1; |
| } |
| |
| if (this->hidden->rawbuf != NULL) { |
| free(this->hidden->rawbuf); |
| this->hidden->rawbuf = NULL; |
| } |
| } |
| static void PSPAUD_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 |
| PSPAUD_Init(SDL_AudioDriverImpl * impl) |
| { |
| |
| // Set the function pointers |
| impl->OpenDevice = PSPAUD_OpenDevice; |
| impl->PlayDevice = PSPAUD_PlayDevice; |
| impl->WaitDevice = PSPAUD_WaitDevice; |
| impl->GetDeviceBuf = PSPAUD_GetDeviceBuf; |
| impl->WaitDone = PSPAUD_WaitDevice; |
| impl->CloseDevice = PSPAUD_CloseDevice; |
| impl->ThreadInit = PSPAUD_ThreadInit; |
| |
| //PSP audio device |
| impl->OnlyHasDefaultOutputDevice = 1; |
| /* |
| impl->HasCaptureSupport = 1; |
| |
| impl->OnlyHasDefaultInputDevice = 1; |
| */ |
| /* |
| impl->DetectDevices = DSOUND_DetectDevices; |
| impl->Deinitialize = DSOUND_Deinitialize; |
| */ |
| return 1; /* this audio target is available. */ |
| } |
| |
| AudioBootStrap PSPAUD_bootstrap = { |
| "psp", "PSP audio driver", PSPAUD_Init, 0 |
| }; |
| |
| /* SDL_AUDI*/ |
| |
| |
| |