Initial commit

1 files changed, 124 insertions, 0 deletions

diff --git a/contrib/SDL-3.2.8/src/audio/SDL_audiodev.c b/contrib/SDL-3.2.8/src/audio/SDL_audiodev.c
new file mode 100644
index 0000000..623a380
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/audio/SDL_audiodev.c
@@ -0,0 +1,124 @@
+/*
+  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"
+
+// Get the name of the audio device we use for output
+
+#if defined(SDL_AUDIO_DRIVER_NETBSD) || defined(SDL_AUDIO_DRIVER_OSS)
+
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h> // For close()
+
+#include "SDL_audiodev_c.h"
+
+#ifndef SDL_PATH_DEV_DSP
+#if defined(SDL_PLATFORM_NETBSD) || defined(SDL_PLATFORM_OPENBSD)
+#define SDL_PATH_DEV_DSP "/dev/audio"
+#else
+#define SDL_PATH_DEV_DSP "/dev/dsp"
+#endif
+#endif
+#ifndef SDL_PATH_DEV_DSP24
+#define SDL_PATH_DEV_DSP24 "/dev/sound/dsp"
+#endif
+#ifndef SDL_PATH_DEV_AUDIO
+#define SDL_PATH_DEV_AUDIO "/dev/audio"
+#endif
+
+static void test_device(const bool recording, const char *fname, int flags, bool (*test)(int fd))
+{
+    struct stat sb;
+    const int audio_fd = open(fname, flags | O_CLOEXEC, 0);
+    if (audio_fd >= 0) {
+        if ((fstat(audio_fd, &sb) == 0) && (S_ISCHR(sb.st_mode))) {
+            const bool okay = test(audio_fd);
+            close(audio_fd);
+            if (okay) {
+                static size_t dummyhandle = 0;
+                dummyhandle++;
+                SDL_assert(dummyhandle != 0);
+
+                /* Note that spec is NULL; while we are opening the device
+                 * endpoint here, the endpoint does not provide any mix format
+                 * information,  making this information inaccessible at
+                 * enumeration time
+                 */
+                SDL_AddAudioDevice(recording, fname, NULL, (void *)(uintptr_t)dummyhandle);
+            }
+        } else {
+            close(audio_fd);
+        }
+    }
+}
+
+static bool test_stub(int fd)
+{
+    return true;
+}
+
+static void SDL_EnumUnixAudioDevices_Internal(const bool recording, const bool classic, bool (*test)(int))
+{
+    const int flags = recording ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT;
+    const char *audiodev;
+    char audiopath[1024];
+
+    if (!test) {
+        test = test_stub;
+    }
+
+    // Figure out what our audio device is
+    audiodev = SDL_getenv("AUDIODEV");
+    if (!audiodev) {
+        if (classic) {
+            audiodev = SDL_PATH_DEV_AUDIO;
+        } else {
+            struct stat sb;
+
+            // Added support for /dev/sound/\* in Linux 2.4
+            if (((stat("/dev/sound", &sb) == 0) && S_ISDIR(sb.st_mode)) && ((stat(SDL_PATH_DEV_DSP24, &sb) == 0) && S_ISCHR(sb.st_mode))) {
+                audiodev = SDL_PATH_DEV_DSP24;
+            } else {
+                audiodev = SDL_PATH_DEV_DSP;
+            }
+        }
+    }
+    test_device(recording, audiodev, flags, test);
+
+    if (SDL_strlen(audiodev) < (sizeof(audiopath) - 3)) {
+        int instance = 0;
+        while (instance <= 64) {
+            (void)SDL_snprintf(audiopath, SDL_arraysize(audiopath),
+                               "%s%d", audiodev, instance);
+            instance++;
+            test_device(recording, audiopath, flags, test);
+        }
+    }
+}
+
+void SDL_EnumUnixAudioDevices(const bool classic, bool (*test)(int))
+{
+    SDL_EnumUnixAudioDevices_Internal(true, classic, test);
+    SDL_EnumUnixAudioDevices_Internal(false, classic, test);
+}
+
+#endif // Audio device selection