Initial commit

2 files changed, 372 insertions, 0 deletions

diff --git a/contrib/SDL-3.2.8/src/audio/netbsd/SDL_netbsdaudio.c b/contrib/SDL-3.2.8/src/audio/netbsd/SDL_netbsdaudio.c
new file mode 100644
index 0000000..26060d3
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/audio/netbsd/SDL_netbsdaudio.c
@@ -0,0 +1,328 @@
+/*
+  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_NETBSD
+
+// Driver for native NetBSD audio(4).
+
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/audioio.h>
+
+#include "../../core/unix/SDL_poll.h"
+#include "../SDL_audiodev_c.h"
+#include "SDL_netbsdaudio.h"
+
+//#define DEBUG_AUDIO
+
+static void NETBSDAUDIO_DetectDevices(SDL_AudioDevice **default_playback, SDL_AudioDevice **default_recording)
+{
+    SDL_EnumUnixAudioDevices(false, NULL);
+}
+
+static void NETBSDAUDIO_Status(SDL_AudioDevice *device)
+{
+#ifdef DEBUG_AUDIO
+    /* *INDENT-OFF* */ // clang-format off
+    audio_info_t info;
+    const struct audio_prinfo *prinfo;
+
+    if (ioctl(device->hidden->audio_fd, AUDIO_GETINFO, &info) < 0) {
+        fprintf(stderr, "AUDIO_GETINFO failed.\n");
+        return;
+    }
+
+    prinfo = device->recording ? &info.record : &info.play;
+
+    fprintf(stderr, "\n"
+            "[%s info]\n"
+            "buffer size        :   %d bytes\n"
+            "sample rate        :   %i Hz\n"
+            "channels   :   %i\n"
+            "precision  :   %i-bit\n"
+            "encoding   :   0x%x\n"
+            "seek               :   %i\n"
+            "sample count       :   %i\n"
+            "EOF count  :   %i\n"
+            "paused             :   %s\n"
+            "error occurred     :   %s\n"
+            "waiting            :   %s\n"
+            "active             :   %s\n"
+            "",
+            device->recording ? "record" : "play",
+            prinfo->buffer_size,
+            prinfo->sample_rate,
+            prinfo->channels,
+            prinfo->precision,
+            prinfo->encoding,
+            prinfo->seek,
+            prinfo->samples,
+            prinfo->eof,
+            prinfo->pause ? "yes" : "no",
+            prinfo->error ? "yes" : "no",
+            prinfo->waiting ? "yes" : "no",
+            prinfo->active ? "yes" : "no");
+
+    fprintf(stderr, "\n"
+            "[audio info]\n"
+            "monitor_gain       :   %i\n"
+            "hw block size      :   %d bytes\n"
+            "hi watermark       :   %i\n"
+            "lo watermark       :   %i\n"
+            "audio mode :   %s\n"
+            "",
+            info.monitor_gain,
+            info.blocksize,
+            info.hiwat, info.lowat,
+            (info.mode == AUMODE_PLAY) ? "PLAY"
+            : (info.mode == AUMODE_RECORD) ? "RECORD"
+            : (info.mode == AUMODE_PLAY_ALL ? "PLAY_ALL" : "?"));
+
+    fprintf(stderr, "\n"
+            "[audio spec]\n"
+            "format             :   0x%x\n"
+            "size               :   %u\n"
+            "",
+            device->spec.format,
+            device->buffer_size);
+    /* *INDENT-ON* */ // clang-format on
+
+#endif // DEBUG_AUDIO
+}
+
+static bool NETBSDAUDIO_WaitDevice(SDL_AudioDevice *device)
+{
+    const bool recording = device->recording;
+    while (!SDL_GetAtomicInt(&device->shutdown)) {
+        audio_info_t info;
+        const int rc = ioctl(device->hidden->audio_fd, AUDIO_GETINFO, &info);
+        if (rc < 0) {
+            if (errno == EAGAIN) {
+                continue;
+            }
+            // Hmm, not much we can do - abort
+            fprintf(stderr, "netbsdaudio WaitDevice ioctl failed (unrecoverable): %s\n", strerror(errno));
+            return false;
+        }
+        const size_t remain = (size_t)((recording ? info.record.seek : info.play.seek) * SDL_AUDIO_BYTESIZE(device->spec.format));
+        if (!recording && (remain >= device->buffer_size)) {
+            SDL_Delay(10);
+        } else if (recording && (remain < device->buffer_size)) {
+            SDL_Delay(10);
+        } else {
+            break; // ready to go!
+        }
+    }
+
+    return true;
+}
+
+static bool NETBSDAUDIO_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    struct SDL_PrivateAudioData *h = device->hidden;
+    const int written = write(h->audio_fd, buffer, buflen);
+    if (written != buflen) {  // Treat even partial writes as fatal errors.
+        return false;
+    }
+
+#ifdef DEBUG_AUDIO
+    fprintf(stderr, "Wrote %d bytes of audio data\n", written);
+#endif
+    return true;
+}
+
+static Uint8 *NETBSDAUDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    return device->hidden->mixbuf;
+}
+
+static int NETBSDAUDIO_RecordDevice(SDL_AudioDevice *device, void *vbuffer, int buflen)
+{
+    Uint8 *buffer = (Uint8 *)vbuffer;
+    const int br = read(device->hidden->audio_fd, buffer, buflen);
+    if (br == -1) {
+        // Non recoverable error has occurred. It should be reported!!!
+        perror("audio");
+        return -1;
+    }
+
+#ifdef DEBUG_AUDIO
+    fprintf(stderr, "Recorded %d bytes of audio data\n", br);
+#endif
+    return br;
+}
+
+static void NETBSDAUDIO_FlushRecording(SDL_AudioDevice *device)
+{
+    struct SDL_PrivateAudioData *h = device->hidden;
+    audio_info_t info;
+    if (ioctl(device->hidden->audio_fd, AUDIO_GETINFO, &info) == 0) {
+        size_t remain = (size_t)(info.record.seek * SDL_AUDIO_BYTESIZE(device->spec.format));
+        while (remain > 0) {
+            char buf[512];
+            const size_t len = SDL_min(sizeof(buf), remain);
+            const ssize_t br = read(h->audio_fd, buf, len);
+            if (br <= 0) {
+                break;
+            }
+            remain -= br;
+        }
+    }
+}
+
+static void NETBSDAUDIO_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->audio_fd >= 0) {
+            close(device->hidden->audio_fd);
+        }
+        SDL_free(device->hidden->mixbuf);
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+static bool NETBSDAUDIO_OpenDevice(SDL_AudioDevice *device)
+{
+    const bool recording = device->recording;
+    int encoding = AUDIO_ENCODING_NONE;
+    audio_info_t info, hwinfo;
+    struct audio_prinfo *prinfo = recording ? &info.record : &info.play;
+
+    // Initialize all variables that we clean on shutdown
+    device->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, sizeof(*device->hidden));
+    if (!device->hidden) {
+        return false;
+    }
+
+    // Open the audio device; we hardcode the device path in `device->name` for lack of better info, so use that.
+    const int flags = ((device->recording) ? O_RDONLY : O_WRONLY);
+    device->hidden->audio_fd = open(device->name, flags | O_CLOEXEC);
+    if (device->hidden->audio_fd < 0) {
+        return SDL_SetError("Couldn't open %s: %s", device->name, strerror(errno));
+    }
+
+    AUDIO_INITINFO(&info);
+
+#ifdef AUDIO_GETFORMAT // Introduced in NetBSD 9.0
+    if (ioctl(device->hidden->audio_fd, AUDIO_GETFORMAT, &hwinfo) != -1) {
+        // Use the device's native sample rate so the kernel doesn't have to resample.
+        device->spec.freq = recording ? hwinfo.record.sample_rate : hwinfo.play.sample_rate;
+    }
+#endif
+
+    prinfo->sample_rate = device->spec.freq;
+    prinfo->channels = device->spec.channels;
+
+    SDL_AudioFormat test_format;
+    const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    while ((test_format = *(closefmts++)) != 0) {
+        switch (test_format) {
+        case SDL_AUDIO_U8:
+            encoding = AUDIO_ENCODING_ULINEAR;
+            break;
+        case SDL_AUDIO_S8:
+            encoding = AUDIO_ENCODING_SLINEAR;
+            break;
+        case SDL_AUDIO_S16LE:
+            encoding = AUDIO_ENCODING_SLINEAR_LE;
+            break;
+        case SDL_AUDIO_S16BE:
+            encoding = AUDIO_ENCODING_SLINEAR_BE;
+            break;
+        case SDL_AUDIO_S32LE:
+            encoding = AUDIO_ENCODING_SLINEAR_LE;
+            break;
+        case SDL_AUDIO_S32BE:
+            encoding = AUDIO_ENCODING_SLINEAR_BE;
+            break;
+        default:
+            continue;
+        }
+        break;
+    }
+
+    if (!test_format) {
+        return SDL_SetError("%s: Unsupported audio format", "netbsd");
+    }
+    prinfo->encoding = encoding;
+    prinfo->precision = SDL_AUDIO_BITSIZE(test_format);
+
+    info.hiwat = 5;
+    info.lowat = 3;
+    if (ioctl(device->hidden->audio_fd, AUDIO_SETINFO, &info) < 0) {
+        return SDL_SetError("AUDIO_SETINFO failed for %s: %s", device->name, strerror(errno));
+    }
+
+    if (ioctl(device->hidden->audio_fd, AUDIO_GETINFO, &info) < 0) {
+        return SDL_SetError("AUDIO_GETINFO failed for %s: %s", device->name, strerror(errno));
+    }
+
+    // Final spec used for the device.
+    device->spec.format = test_format;
+    device->spec.freq = prinfo->sample_rate;
+    device->spec.channels = prinfo->channels;
+
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    if (!recording) {
+        // Allocate mixing buffer
+        device->hidden->mixlen = device->buffer_size;
+        device->hidden->mixbuf = (Uint8 *)SDL_malloc(device->hidden->mixlen);
+        if (!device->hidden->mixbuf) {
+            return false;
+        }
+        SDL_memset(device->hidden->mixbuf, device->silence_value, device->buffer_size);
+    }
+
+    NETBSDAUDIO_Status(device);
+
+    return true;  // We're ready to rock and roll. :-)
+}
+
+static bool NETBSDAUDIO_Init(SDL_AudioDriverImpl *impl)
+{
+    impl->DetectDevices = NETBSDAUDIO_DetectDevices;
+    impl->OpenDevice = NETBSDAUDIO_OpenDevice;
+    impl->WaitDevice = NETBSDAUDIO_WaitDevice;
+    impl->PlayDevice = NETBSDAUDIO_PlayDevice;
+    impl->GetDeviceBuf = NETBSDAUDIO_GetDeviceBuf;
+    impl->CloseDevice = NETBSDAUDIO_CloseDevice;
+    impl->WaitRecordingDevice = NETBSDAUDIO_WaitDevice;
+    impl->RecordDevice = NETBSDAUDIO_RecordDevice;
+    impl->FlushRecording = NETBSDAUDIO_FlushRecording;
+
+    impl->HasRecordingSupport = true;
+
+    return true;
+}
+
+AudioBootStrap NETBSDAUDIO_bootstrap = {
+    "netbsd", "NetBSD audio", NETBSDAUDIO_Init, false, false
+};
+
+#endif // SDL_AUDIO_DRIVER_NETBSD
diff --git a/contrib/SDL-3.2.8/src/audio/netbsd/SDL_netbsdaudio.h b/contrib/SDL-3.2.8/src/audio/netbsd/SDL_netbsdaudio.h
new file mode 100644
index 0000000..dcdc6f4
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/audio/netbsd/SDL_netbsdaudio.h
@@ -0,0 +1,44 @@
+/*
+  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"
+
+#ifndef SDL_netbsdaudio_h_
+#define SDL_netbsdaudio_h_
+
+#include "../SDL_sysaudio.h"
+
+struct SDL_PrivateAudioData
+{
+    // The file descriptor for the audio device
+    int audio_fd;
+
+    // Raw mixing buffer
+    Uint8 *mixbuf;
+    int mixlen;
+
+    // Support for audio timing using a timer, in addition to SDL_IOReady()
+    float frame_ticks;
+    float next_frame;
+};
+
+#define FUDGE_TICKS 10 // The scheduler overhead ticks per frame
+
+#endif // SDL_netbsdaudio_h_