1 files changed, 451 insertions, 0 deletions

diff --git a/contrib/SDL-3.2.8/src/audio/qnx/SDL_qsa_audio.c b/contrib/SDL-3.2.8/src/audio/qnx/SDL_qsa_audio.c
new file mode 100644
index 0000000..a31bea4
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/audio/qnx/SDL_qsa_audio.c
@@ -0,0 +1,451 @@
+/*
+  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.
+*/
+
+// !!! FIXME: can this target support hotplugging?
+
+#include "../../SDL_internal.h"
+
+#ifdef SDL_AUDIO_DRIVER_QNX
+
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sched.h>
+#include <sys/select.h>
+#include <sys/neutrino.h>
+#include <sys/asoundlib.h>
+
+#include "SDL3/SDL_timer.h"
+#include "SDL3/SDL_audio.h"
+#include "../../core/unix/SDL_poll.h"
+#include "../SDL_sysaudio.h"
+#include "SDL_qsa_audio.h"
+
+// default channel communication parameters
+#define DEFAULT_CPARAMS_RATE   44100
+#define DEFAULT_CPARAMS_VOICES 1
+
+#define DEFAULT_CPARAMS_FRAG_SIZE 4096
+#define DEFAULT_CPARAMS_FRAGS_MIN 1
+#define DEFAULT_CPARAMS_FRAGS_MAX 1
+
+#define QSA_MAX_NAME_LENGTH   81+16     // Hardcoded in QSA, can't be changed
+
+static bool QSA_SetError(const char *fn, int status)
+{
+    return SDL_SetError("QSA: %s() failed: %s", fn, snd_strerror(status));
+}
+
+// !!! FIXME: does this need to be here? Does the SDL version not work?
+static void QSA_ThreadInit(SDL_AudioDevice *device)
+{
+    // Increase default 10 priority to 25 to avoid jerky sound
+    struct sched_param param;
+    if (SchedGet(0, 0, &param) != -1) {
+        param.sched_priority = param.sched_curpriority + 15;
+        SchedSet(0, 0, SCHED_NOCHANGE, &param);
+    }
+}
+
+// PCM channel parameters initialize function
+static void QSA_InitAudioParams(snd_pcm_channel_params_t * cpars)
+{
+    SDL_zerop(cpars);
+    cpars->channel = SND_PCM_CHANNEL_PLAYBACK;
+    cpars->mode = SND_PCM_MODE_BLOCK;
+    cpars->start_mode = SND_PCM_START_DATA;
+    cpars->stop_mode = SND_PCM_STOP_STOP;
+    cpars->format.format = SND_PCM_SFMT_S16_LE;
+    cpars->format.interleave = 1;
+    cpars->format.rate = DEFAULT_CPARAMS_RATE;
+    cpars->format.voices = DEFAULT_CPARAMS_VOICES;
+    cpars->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE;
+    cpars->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN;
+    cpars->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX;
+}
+
+// This function waits until it is possible to write a full sound buffer
+static bool QSA_WaitDevice(SDL_AudioDevice *device)
+{
+    // Setup timeout for playing one fragment equal to 2 seconds
+    // If timeout occurred than something wrong with hardware or driver
+    // For example, Vortex 8820 audio driver stucks on second DAC because
+    // it doesn't exist !
+    const int result = SDL_IOReady(device->hidden->audio_fd,
+                                   device->recording ? SDL_IOR_READ : SDL_IOR_WRITE,
+                                   2 * 1000);
+    switch (result) {
+    case -1:
+        SDL_LogError(SDL_LOG_CATEGORY_AUDIO, "QSA: SDL_IOReady() failed: %s", strerror(errno));
+        return false;
+    case 0:
+        device->hidden->timeout_on_wait = true;  // !!! FIXME: Should we just disconnect the device in this case?
+        break;
+    default:
+        device->hidden->timeout_on_wait = false;
+        break;
+    }
+
+    return true;
+}
+
+static bool QSA_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
+{
+    if (SDL_GetAtomicInt(&device->shutdown) || !device->hidden) {
+        return true;
+    }
+
+    int towrite = buflen;
+
+    // Write the audio data, checking for EAGAIN (buffer full) and underrun
+    while ((towrite > 0) && !SDL_GetAtomicInt(&device->shutdown));
+        const int bw = snd_pcm_plugin_write(device->hidden->audio_handle, buffer, towrite);
+        if (bw != towrite) {
+            // Check if samples playback got stuck somewhere in hardware or in the audio device driver
+            if ((errno == EAGAIN) && (bw == 0)) {
+                if (device->hidden->timeout_on_wait) {
+                    return true;  // oh well, try again next time.  !!! FIXME: Should we just disconnect the device in this case?
+                }
+            }
+
+            // Check for errors or conditions
+            if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) {
+                SDL_Delay(1);  // Let a little CPU time go by and try to write again
+
+                // if we wrote some data
+                towrite -= bw;
+                buffer += bw * device->spec.channels;
+                continue;
+            } else if ((errno == EINVAL) || (errno == EIO)) {
+                snd_pcm_channel_status_t cstatus;
+                SDL_zero(cstatus);
+                cstatus.channel = device->recording ? SND_PCM_CHANNEL_CAPTURE : SND_PCM_CHANNEL_PLAYBACK;
+
+                int status = snd_pcm_plugin_status(device->hidden->audio_handle, &cstatus);
+                if (status < 0) {
+                    QSA_SetError("snd_pcm_plugin_status", status);
+                    return false;
+                } else if ((cstatus.status == SND_PCM_STATUS_UNDERRUN) || (cstatus.status == SND_PCM_STATUS_READY)) {
+                    status = snd_pcm_plugin_prepare(device->hidden->audio_handle, device->recording ? SND_PCM_CHANNEL_CAPTURE : SND_PCM_CHANNEL_PLAYBACK);
+                    if (status < 0) {
+                        QSA_SetError("snd_pcm_plugin_prepare", status);
+                        return false;
+                    }
+                }
+                continue;
+            } else {
+                return false;
+            }
+        } else {
+            // we wrote all remaining data
+            towrite -= bw;
+            buffer += bw * device->spec.channels;
+        }
+    }
+
+    // If we couldn't write, assume fatal error for now
+    return (towrite == 0);
+}
+
+static Uint8 *QSA_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
+{
+    return device->hidden->pcm_buf;
+}
+
+static void QSA_CloseDevice(SDL_AudioDevice *device)
+{
+    if (device->hidden) {
+        if (device->hidden->audio_handle) {
+            #if _NTO_VERSION < 710
+            // Finish playing available samples or cancel unread samples during recording
+            snd_pcm_plugin_flush(device->hidden->audio_handle, device->recording ? SND_PCM_CHANNEL_CAPTURE : SND_PCM_CHANNEL_PLAYBACK);
+            #endif
+            snd_pcm_close(device->hidden->audio_handle);
+        }
+
+        SDL_free(device->hidden->pcm_buf);
+        SDL_free(device->hidden);
+        device->hidden = NULL;
+    }
+}
+
+static bool QSA_OpenDevice(SDL_AudioDevice *device)
+{
+    if (device->recording) {
+        return SDL_SetError("SDL recording support isn't available on QNX atm"); // !!! FIXME: most of this code has support for recording devices, but there's no RecordDevice, etc functions. Fill them in!
+    }
+
+    SDL_assert(device->handle != NULL);  // NULL used to mean "system default device" in SDL2; it does not mean that in SDL3.
+    const Uint32 sdlhandle = (Uint32) ((size_t) device->handle);
+    const uint32_t cardno = (uint32_t) (sdlhandle & 0xFFFF);
+    const uint32_t deviceno = (uint32_t) ((sdlhandle >> 16) & 0xFFFF);
+    const bool recording = device->recording;
+    int status = 0;
+
+    // Initialize all variables that we clean on shutdown
+    device->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, (sizeof (struct SDL_PrivateAudioData)));
+    if (device->hidden == NULL) {
+        return false;
+    }
+
+    // Initialize channel transfer parameters to default
+    snd_pcm_channel_params_t cparams;
+    QSA_InitAudioParams(&cparams);
+
+    // Open requested audio device
+    status = snd_pcm_open(&device->hidden->audio_handle, cardno, deviceno, recording ? SND_PCM_OPEN_CAPTURE : SND_PCM_OPEN_PLAYBACK);
+    if (status < 0) {
+        device->hidden->audio_handle = NULL;
+        return QSA_SetError("snd_pcm_open", status);
+    }
+
+    // Try for a closest match on audio format
+    SDL_AudioFormat test_format = 0;
+    const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
+    while ((test_format = *(closefmts++)) != 0) {
+        // if match found set format to equivalent QSA format
+        switch (test_format) {
+        #define CHECKFMT(sdlfmt, qsafmt) case SDL_AUDIO_##sdlfmt: cparams.format.format = SND_PCM_SFMT_##qsafmt; break
+        CHECKFMT(U8, U8);
+        CHECKFMT(S8, S8);
+        CHECKFMT(S16LSB, S16_LE);
+        CHECKFMT(S16MSB, S16_BE);
+        CHECKFMT(S32LSB, S32_LE);
+        CHECKFMT(S32MSB, S32_BE);
+        CHECKFMT(F32LSB, FLOAT_LE);
+        CHECKFMT(F32MSB, FLOAT_BE);
+        #undef CHECKFMT
+        default: continue;
+        }
+        break;
+    }
+
+    // assumes test_format not 0 on success
+    if (test_format == 0) {
+        return SDL_SetError("QSA: Couldn't find any hardware audio formats");
+    }
+
+    device->spec.format = test_format;
+
+    // Set mono/stereo/4ch/6ch/8ch audio
+    cparams.format.voices = device->spec.channels;
+
+    // Set rate
+    cparams.format.rate = device->spec.freq;
+
+    // Setup the transfer parameters according to cparams
+    status = snd_pcm_plugin_params(device->hidden->audio_handle, &cparams);
+    if (status < 0) {
+        return QSA_SetError("snd_pcm_plugin_params", status);
+    }
+
+    // Make sure channel is setup right one last time
+    snd_pcm_channel_setup_t csetup;
+    SDL_zero(csetup);
+    csetup.channel = recording ? SND_PCM_CHANNEL_CAPTURE : SND_PCM_CHANNEL_PLAYBACK;
+    if (snd_pcm_plugin_setup(device->hidden->audio_handle, &csetup) < 0) {
+        return SDL_SetError("QSA: Unable to setup channel");
+    }
+
+    device->sample_frames = csetup.buf.block.frag_size;
+
+    // Calculate the final parameters for this audio specification
+    SDL_UpdatedAudioDeviceFormat(device);
+
+    device->hidden->pcm_buf = (Uint8 *) SDL_malloc(device->buffer_size);
+    if (device->hidden->pcm_buf == NULL) {
+        return false;
+    }
+    SDL_memset(device->hidden->pcm_buf, device->silence_value, device->buffer_size);
+
+    // get the file descriptor
+    device->hidden->audio_fd = snd_pcm_file_descriptor(device->hidden->audio_handle, csetup.channel);
+    if (device->hidden->audio_fd < 0) {
+        return QSA_SetError("snd_pcm_file_descriptor", device->hidden->audio_fd);
+    }
+
+    // Prepare an audio channel
+    status = snd_pcm_plugin_prepare(device->hidden->audio_handle, csetup.channel)
+    if (status < 0) {
+        return QSA_SetError("snd_pcm_plugin_prepare", status);
+    }
+
+    return true;  // We're really ready to rock and roll. :-)
+}
+
+static SDL_AudioFormat QnxFormatToSDLFormat(const int32_t qnxfmt)
+{
+    switch (qnxfmt) {
+        #define CHECKFMT(sdlfmt, qsafmt) case SND_PCM_SFMT_##qsafmt: return SDL_AUDIO_##sdlfmt
+        CHECKFMT(U8, U8);
+        CHECKFMT(S8, S8);
+        CHECKFMT(S16LSB, S16_LE);
+        CHECKFMT(S16MSB, S16_BE);
+        CHECKFMT(S32LSB, S32_LE);
+        CHECKFMT(S32MSB, S32_BE);
+        CHECKFMT(F32LSB, FLOAT_LE);
+        CHECKFMT(F32MSB, FLOAT_BE);
+        #undef CHECKFMT
+        default: break;
+    }
+    return SDL_AUDIO_S16;  // oh well.
+}
+
+static void QSA_DetectDevices(SDL_AudioDevice **default_playback, SDL_AudioDevice **default_recording)
+{
+    // Detect amount of available devices
+    // this value can be changed in the runtime
+    int num_cards = 0;
+    (void) snd_cards_list(NULL, 0, &alloc_num_cards);
+    bool isstack = false;
+    int *cards = SDL_small_alloc(int, num_cards, &isstack);
+    if (!cards) {
+        return;  // we're in trouble.
+    }
+    int overflow_cards = 0;
+    const int total_num_cards = snd_cards_list(cards, num_cards, &overflow_cards);
+    // if overflow_cards > 0 or total_num_cards > num_cards, it changed at the last moment; oh well, we lost some.
+    num_cards = SDL_min(num_cards, total_num_cards);  // ...but make sure it didn't _shrink_.
+
+    // If io-audio manager is not running we will get 0 as number of available audio devices
+    if (num_cards == 0) {   // not any available audio devices?
+        SDL_small_free(cards, isstack);
+        return;
+    }
+
+    // Find requested devices by type
+    for (int it = 0; it < num_cards; it++) {
+        const int card = cards[it];
+        for (uint32_t deviceno = 0; ; deviceno++) {
+            int32_t status;
+            char name[QSA_MAX_NAME_LENGTH];
+
+            status = snd_card_get_longname(card, name, sizeof (name));
+            if (status == EOK) {
+                snd_pcm_t *handle;
+
+                // Add device number to device name
+                char fullname[QSA_MAX_NAME_LENGTH + 32];
+                SDL_snprintf(fullname, sizeof (fullname), "%s d%d", name, (int) deviceno);
+
+                // Check if this device id could play anything
+                bool recording = false;
+                status = snd_pcm_open(&handle, card, deviceno, SND_PCM_OPEN_PLAYBACK);
+                if (status != EOK) {  // no? See if it's a recording device instead.
+                    #if 0  // !!! FIXME: most of this code has support for recording devices, but there's no RecordDevice, etc functions. Fill them in!
+                    status = snd_pcm_open(&handle, card, deviceno, SND_PCM_OPEN_CAPTURE);
+                    if (status == EOK) {
+                        recording = true;
+                    }
+                    #endif
+                }
+
+                if (status == EOK) {
+                    SDL_AudioSpec spec;
+                    SDL_zero(spec);
+                    SDL_AudioSpec *pspec = &spec;
+                    snd_pcm_channel_setup_t csetup;
+                    SDL_zero(csetup);
+                    csetup.channel = recording ? SND_PCM_CHANNEL_CAPTURE : SND_PCM_CHANNEL_PLAYBACK;
+
+                    if (snd_pcm_plugin_setup(device->hidden->audio_handle, &csetup) < 0) {
+                        pspec = NULL;  // go on without spec info.
+                    } else {
+                        spec.format = QnxFormatToSDLFormat(csetup.format.format);
+                        spec.channels = csetup.format.channels;
+                        spec.freq = csetup.format.rate;
+                    }
+
+                    status = snd_pcm_close(handle);
+                    if (status == EOK) {
+                        // !!! FIXME: I'm assuming each of these values are way less than 0xFFFF. Fix this if not.
+                        SDL_assert(card <= 0xFFFF);
+                        SDL_assert(deviceno <= 0xFFFF);
+                        const Uint32 sdlhandle = ((Uint32) card) | (((Uint32) deviceno) << 16);
+                        SDL_AddAudioDevice(recording, fullname, pspec, (void *) ((size_t) sdlhandle));
+                    }
+                } else {
+                    // Check if we got end of devices list
+                    if (status == -ENOENT) {
+                        break;
+                    }
+                }
+            } else {
+                break;
+            }
+        }
+    }
+
+    SDL_small_free(cards, isstack);
+
+    // Try to open the "preferred" devices, which will tell us the card/device pairs for the default devices.
+    snd_pcm_t handle;
+    int cardno, deviceno;
+    if (snd_pcm_open_preferred(&handle, &cardno, &deviceno, SND_PCM_OPEN_PLAYBACK) == 0) {
+        snd_pcm_close(handle);
+        // !!! FIXME: I'm assuming each of these values are way less than 0xFFFF. Fix this if not.
+        SDL_assert(cardno <= 0xFFFF);
+        SDL_assert(deviceno <= 0xFFFF);
+        const Uint32 sdlhandle = ((Uint32) card) | (((Uint32) deviceno) << 16);
+        *default_playback = SDL_FindPhysicalAudioDeviceByHandle((void *) ((size_t) sdlhandle));
+    }
+
+    if (snd_pcm_open_preferred(&handle, &cardno, &deviceno, SND_PCM_OPEN_CAPTURE) == 0) {
+        snd_pcm_close(handle);
+        // !!! FIXME: I'm assuming each of these values are way less than 0xFFFF. Fix this if not.
+        SDL_assert(cardno <= 0xFFFF);
+        SDL_assert(deviceno <= 0xFFFF);
+        const Uint32 sdlhandle = ((Uint32) card) | (((Uint32) deviceno) << 16);
+        *default_recording = SDL_FindPhysicalAudioDeviceByHandle((void *) ((size_t) sdlhandle));
+    }
+}
+
+static void QSA_Deinitialize(void)
+{
+    // nothing to do here atm.
+}
+
+static bool QSA_Init(SDL_AudioDriverImpl * impl)
+{
+    impl->DetectDevices = QSA_DetectDevices;
+    impl->OpenDevice = QSA_OpenDevice;
+    impl->ThreadInit = QSA_ThreadInit;
+    impl->WaitDevice = QSA_WaitDevice;
+    impl->PlayDevice = QSA_PlayDevice;
+    impl->GetDeviceBuf = QSA_GetDeviceBuf;
+    impl->CloseDevice = QSA_CloseDevice;
+    impl->Deinitialize = QSA_Deinitialize;
+
+    // !!! FIXME: most of this code has support for recording devices, but there's no RecordDevice, etc functions. Fill them in!
+    //impl->HasRecordingSupport = true;
+
+    return true;
+}
+
+AudioBootStrap QSAAUDIO_bootstrap = {
+    "qsa", "QNX QSA Audio", QSA_Init, false, false
+};
+
+#endif // SDL_AUDIO_DRIVER_QNX
+