2 files changed, 279 insertions, 0 deletions

diff --git a/contrib/SDL-3.2.8/src/audio/vita/SDL_vitaaudio.c b/contrib/SDL-3.2.8/src/audio/vita/SDL_vitaaudio.c
new file mode 100644
index 0000000..e194f21
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/audio/vita/SDL_vitaaudio.c
@@ -0,0 +1,238 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 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"
+
+#ifdef SDL_AUDIO_DRIVER_VITA
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "../SDL_audiodev_c.h"
+#include "../SDL_sysaudio.h"
+#include "SDL_vitaaudio.h"
+
+#include <psp2/kernel/threadmgr.h>
+#include <psp2/audioout.h>
+#include <psp2/audioin.h>
+
+#define SCE_AUDIO_SAMPLE_ALIGN(s) (((s) + 63) & ~63)
+#define SCE_AUDIO_MAX_VOLUME      0x8000
+
+static bool VITAAUD_OpenRecordingDevice(SDL_AudioDevice *device)
+{
+    device->spec.freq = 16000;
+    device->spec.channels = 1;
+    device->sample_frames = 512;
+
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    device->hidden->port = sceAudioInOpenPort(SCE_AUDIO_IN_PORT_TYPE_VOICE, 512, 16000, SCE_AUDIO_IN_PARAM_FORMAT_S16_MONO);
+
+    if (device->hidden->port < 0) {
+        return SDL_SetError("Couldn't open audio in port: %x", device->hidden->port);
+    }
+
+    return true;
+}
+
+static bool VITAAUD_OpenDevice(SDL_AudioDevice *device)
+{
+    int format, mixlen, i, port = SCE_AUDIO_OUT_PORT_TYPE_MAIN;
+    int vols[2] = { SCE_AUDIO_MAX_VOLUME, SCE_AUDIO_MAX_VOLUME };
+    SDL_AudioFormat test_format;
+    const SDL_AudioFormat *closefmts;
+
+    device->hidden = (struct SDL_PrivateAudioData *)
+        SDL_calloc(1, sizeof(*device->hidden));
+    if (!device->hidden) {
+        return false;
+    }
+
+    closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    while ((test_format = *(closefmts++)) != 0) {
+        if (test_format == SDL_AUDIO_S16LE) {
+            device->spec.format = test_format;
+            break;
+        }
+    }
+
+    if (!test_format) {
+        return SDL_SetError("Unsupported audio format");
+    }
+
+    if (device->recording) {
+        return VITAAUD_OpenRecordingDevice(device);
+    }
+
+    // The sample count must be a multiple of 64.
+    device->sample_frames = SCE_AUDIO_SAMPLE_ALIGN(device->sample_frames);
+
+    // 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. */
+    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");
+    }
+
+    // Setup the hardware channel.
+    if (device->spec.channels == 1) {
+        format = SCE_AUDIO_OUT_MODE_MONO;
+    } else {
+        format = SCE_AUDIO_OUT_MODE_STEREO;
+    }
+
+    // the main port requires 48000Hz audio, so this drops to the background music port if necessary
+    if (device->spec.freq < 48000) {
+        port = SCE_AUDIO_OUT_PORT_TYPE_BGM;
+    }
+
+    device->hidden->port = sceAudioOutOpenPort(port, device->sample_frames, device->spec.freq, format);
+    if (device->hidden->port < 0) {
+        SDL_aligned_free(device->hidden->rawbuf);
+        device->hidden->rawbuf = NULL;
+        return SDL_SetError("Couldn't open audio out port: %x", device->hidden->port);
+    }
+
+    sceAudioOutSetVolume(device->hidden->port, SCE_AUDIO_VOLUME_FLAG_L_CH | SCE_AUDIO_VOLUME_FLAG_R_CH, vols);
+
+    SDL_memset(device->hidden->rawbuf, 0, mixlen);
+    for (i = 0; i < NUM_BUFFERS; i++) {
+        device->hidden->mixbufs[i] = &device->hidden->rawbuf[i * device->buffer_size];
+    }
+
+    device->hidden->next_buffer = 0;
+    return true;
+}
+
+static bool VITAAUD_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buffer_size)
+{
+    return (sceAudioOutOutput(device->hidden->port, buffer) == 0);
+}
+
+// This function waits until it is possible to write a full sound buffer
+static bool VITAAUD_WaitDevice(SDL_AudioDevice *device)
+{
+    // !!! FIXME: we might just need to sleep roughly as long as playback buffers take to process, based on sample rate, etc.
+    while (!SDL_GetAtomicInt(&device->shutdown) && (sceAudioOutGetRestSample(device->hidden->port) >= device->buffer_size)) {
+        SDL_Delay(1);
+    }
+    return true;
+}
+
+static Uint8 *VITAAUD_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    Uint8 *result = device->hidden->mixbufs[device->hidden->next_buffer];
+    device->hidden->next_buffer = (device->hidden->next_buffer + 1) % NUM_BUFFERS;
+    return result;
+}
+
+static void VITAAUD_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->port >= 0) {
+            if (device->recording) {
+                sceAudioInReleasePort(device->hidden->port);
+            } else {
+                sceAudioOutReleasePort(device->hidden->port);
+            }
+            device->hidden->port = -1;
+        }
+
+        if (!device->recording && device->hidden->rawbuf) {
+            SDL_aligned_free(device->hidden->rawbuf); // this uses SDL_aligned_alloc(), not SDL_malloc()
+            device->hidden->rawbuf = NULL;
+        }
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+static bool VITAAUD_WaitRecordingDevice(SDL_AudioDevice *device)
+{
+    // there's only a blocking call to obtain more data, so we'll just sleep as
+    //  long as a buffer would run.
+    const Uint64 endticks = SDL_GetTicks() + ((device->sample_frames * 1000) / device->spec.freq);
+    while (!SDL_GetAtomicInt(&device->shutdown) && (SDL_GetTicks() < endticks)) {
+        SDL_Delay(1);
+    }
+    return true;
+}
+
+static int VITAAUD_RecordDevice(SDL_AudioDevice *device, void *buffer, int buflen)
+{
+    int ret;
+    SDL_assert(buflen == device->buffer_size);
+    ret = sceAudioInInput(device->hidden->port, buffer);
+    if (ret < 0) {
+        SDL_SetError("Failed to record from device: %x", ret);
+        return -1;
+    }
+    return device->buffer_size;
+}
+
+static void VITAAUD_FlushRecording(SDL_AudioDevice *device)
+{
+    // just grab the latest and dump it.
+    sceAudioInInput(device->hidden->port, device->work_buffer);
+}
+
+static void VITAAUD_ThreadInit(SDL_AudioDevice *device)
+{
+    // Increase the priority of this audio thread by 1 to put it ahead of other SDL threads.
+    SceUID thid;
+    SceKernelThreadInfo info;
+    thid = sceKernelGetThreadId();
+    info.size = sizeof(SceKernelThreadInfo);
+    if (sceKernelGetThreadInfo(thid, &info) == 0) {
+        sceKernelChangeThreadPriority(thid, info.currentPriority - 1);
+    }
+}
+
+static bool VITAAUD_Init(SDL_AudioDriverImpl *impl)
+{
+    impl->OpenDevice = VITAAUD_OpenDevice;
+    impl->PlayDevice = VITAAUD_PlayDevice;
+    impl->WaitDevice = VITAAUD_WaitDevice;
+    impl->GetDeviceBuf = VITAAUD_GetDeviceBuf;
+    impl->CloseDevice = VITAAUD_CloseDevice;
+    impl->ThreadInit = VITAAUD_ThreadInit;
+    impl->WaitRecordingDevice = VITAAUD_WaitRecordingDevice;
+    impl->FlushRecording = VITAAUD_FlushRecording;
+    impl->RecordDevice = VITAAUD_RecordDevice;
+
+    impl->HasRecordingSupport = true;
+    impl->OnlyHasDefaultPlaybackDevice = true;
+    impl->OnlyHasDefaultRecordingDevice = true;
+
+    return true;
+}
+
+AudioBootStrap VITAAUD_bootstrap = {
+    "vita", "VITA audio driver", VITAAUD_Init, false, false
+};
+
+#endif // SDL_AUDIO_DRIVER_VITA
diff --git a/contrib/SDL-3.2.8/src/audio/vita/SDL_vitaaudio.h b/contrib/SDL-3.2.8/src/audio/vita/SDL_vitaaudio.h
new file mode 100644
index 0000000..1e97499
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/audio/vita/SDL_vitaaudio.h
@@ -0,0 +1,41 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 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.
+*/
+
+#ifndef SDL_vitaaudio_h
+#define SDL_vitaaudio_h
+
+#include "../SDL_sysaudio.h"
+
+#define NUM_BUFFERS 2
+
+struct SDL_PrivateAudioData
+{
+    // The hardware input/output port.
+    int port;
+    // The raw allocated mixing buffer.
+    Uint8 *rawbuf;
+    // Individual mixing buffers.
+    Uint8 *mixbufs[NUM_BUFFERS];
+    // Index of the next available mixing buffer.
+    int next_buffer;
+};
+
+#endif // SDL_vitaaudio_h