From 5a079a2d114f96d4847d1ee305d5b7c16eeec50e Mon Sep 17 00:00:00 2001 From: 3gg <3gg@shellblade.net> Date: Sat, 27 Dec 2025 12:03:39 -0800 Subject: Initial commit --- contrib/SDL-3.2.8/src/audio/psp/SDL_pspaudio.c | 183 +++++++++++++++++++++++++ 1 file changed, 183 insertions(+) create mode 100644 contrib/SDL-3.2.8/src/audio/psp/SDL_pspaudio.c (limited to 'contrib/SDL-3.2.8/src/audio/psp/SDL_pspaudio.c') diff --git a/contrib/SDL-3.2.8/src/audio/psp/SDL_pspaudio.c b/contrib/SDL-3.2.8/src/audio/psp/SDL_pspaudio.c new file mode 100644 index 0000000..18546e8 --- /dev/null +++ b/contrib/SDL-3.2.8/src/audio/psp/SDL_pspaudio.c @@ -0,0 +1,183 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2025 Sam Lantinga + + 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_PSP + +#include +#include +#include + +#include "../SDL_audiodev_c.h" +#include "../SDL_sysaudio.h" +#include "SDL_pspaudio.h" + +#include +#include + +static bool isBasicAudioConfig(const SDL_AudioSpec *spec) +{ + return spec->freq == 44100; +} + +static bool PSPAUDIO_OpenDevice(SDL_AudioDevice *device) +{ + device->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, sizeof(*device->hidden)); + if (!device->hidden) { + return false; + } + + // device only natively supports S16LSB + device->spec.format = SDL_AUDIO_S16LE; + + /* PSP has some limitations with the Audio. It fully supports 44.1KHz (Mono & Stereo), + however with frequencies different than 44.1KHz, it just supports Stereo, + so a resampler must be done for these scenarios */ + if (isBasicAudioConfig(&device->spec)) { + // The sample count must be a multiple of 64. + device->sample_frames = PSP_AUDIO_SAMPLE_ALIGN(device->sample_frames); + // The number of channels (1 or 2). + device->spec.channels = device->spec.channels == 1 ? 1 : 2; + const int format = (device->spec.channels == 1) ? PSP_AUDIO_FORMAT_MONO : PSP_AUDIO_FORMAT_STEREO; + device->hidden->channel = sceAudioChReserve(PSP_AUDIO_NEXT_CHANNEL, device->sample_frames, format); + } else { + // 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11050, 8000 + switch (device->spec.freq) { + case 8000: + case 11025: + case 12000: + case 16000: + case 22050: + case 24000: + case 32000: + case 44100: + case 48000: + break; // acceptable, keep it + default: + device->spec.freq = 48000; + break; + } + // The number of samples to output in one output call (min 17, max 4111). + device->sample_frames = device->sample_frames < 17 ? 17 : (device->sample_frames > 4111 ? 4111 : device->sample_frames); + device->spec.channels = 2; // we're forcing the hardware to stereo. + device->hidden->channel = sceAudioSRCChReserve(device->sample_frames, device->spec.freq, 2); + } + + if (device->hidden->channel < 0) { + return SDL_SetError("Couldn't reserve hardware channel"); + } + + // Update the fragment size as size in bytes. + SDL_UpdatedAudioDeviceFormat(device); + + /* 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. */ + const int mixlen = device->buffer_size * NUM_BUFFERS; + device->hidden->rawbuf = (Uint8 *)SDL_aligned_alloc(64, mixlen); + if (!device->hidden->rawbuf) { + return SDL_SetError("Couldn't allocate mixing buffer"); + } + + SDL_memset(device->hidden->rawbuf, device->silence_value, mixlen); + for (int i = 0; i < NUM_BUFFERS; i++) { + device->hidden->mixbufs[i] = &device->hidden->rawbuf[i * device->buffer_size]; + } + + return true; +} + +static bool PSPAUDIO_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen) +{ + int rc; + if (!isBasicAudioConfig(&device->spec)) { + SDL_assert(device->spec.channels == 2); + rc = sceAudioSRCOutputBlocking(PSP_AUDIO_VOLUME_MAX, (void *) buffer); + } else { + rc = sceAudioOutputPannedBlocking(device->hidden->channel, PSP_AUDIO_VOLUME_MAX, PSP_AUDIO_VOLUME_MAX, (void *) buffer); + } + return (rc == 0); +} + +static bool PSPAUDIO_WaitDevice(SDL_AudioDevice *device) +{ + return true; // Because we block when sending audio, there's no need for this function to do anything. +} + +static Uint8 *PSPAUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size) +{ + Uint8 *buffer = device->hidden->mixbufs[device->hidden->next_buffer]; + device->hidden->next_buffer = (device->hidden->next_buffer + 1) % NUM_BUFFERS; + return buffer; +} + +static void PSPAUDIO_CloseDevice(SDL_AudioDevice *device) +{ + if (device->hidden) { + if (device->hidden->channel >= 0) { + if (!isBasicAudioConfig(&device->spec)) { + sceAudioSRCChRelease(); + } else { + sceAudioChRelease(device->hidden->channel); + } + device->hidden->channel = -1; + } + + if (device->hidden->rawbuf) { + SDL_aligned_free(device->hidden->rawbuf); + device->hidden->rawbuf = NULL; + } + SDL_free(device->hidden); + device->hidden = NULL; + } +} + +static void PSPAUDIO_ThreadInit(SDL_AudioDevice *device) +{ + /* Increase the priority of this audio thread by 1 to put it + ahead of other SDL threads. */ + const SceUID thid = sceKernelGetThreadId(); + SceKernelThreadInfo status; + status.size = sizeof(SceKernelThreadInfo); + if (sceKernelReferThreadStatus(thid, &status) == 0) { + sceKernelChangeThreadPriority(thid, status.currentPriority - 1); + } +} + +static bool PSPAUDIO_Init(SDL_AudioDriverImpl *impl) +{ + impl->OpenDevice = PSPAUDIO_OpenDevice; + impl->PlayDevice = PSPAUDIO_PlayDevice; + impl->WaitDevice = PSPAUDIO_WaitDevice; + impl->GetDeviceBuf = PSPAUDIO_GetDeviceBuf; + impl->CloseDevice = PSPAUDIO_CloseDevice; + impl->ThreadInit = PSPAUDIO_ThreadInit; + impl->OnlyHasDefaultPlaybackDevice = true; + //impl->HasRecordingSupport = true; + //impl->OnlyHasDefaultRecordingDevice = true; + return true; +} + +AudioBootStrap PSPAUDIO_bootstrap = { + "psp", "PSP audio driver", PSPAUDIO_Init, false, false +}; + +#endif // SDL_AUDIO_DRIVER_PSP -- cgit v1.2.3