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Diffstat (limited to 'source/3rd-party/SDL2/src/audio/nacl')
-rw-r--r--source/3rd-party/SDL2/src/audio/nacl/SDL_naclaudio.c165
-rw-r--r--source/3rd-party/SDL2/src/audio/nacl/SDL_naclaudio.h43
2 files changed, 208 insertions, 0 deletions
diff --git a/source/3rd-party/SDL2/src/audio/nacl/SDL_naclaudio.c b/source/3rd-party/SDL2/src/audio/nacl/SDL_naclaudio.c
new file mode 100644
index 0000000..3e3afc0
--- /dev/null
+++ b/source/3rd-party/SDL2/src/audio/nacl/SDL_naclaudio.c
@@ -0,0 +1,165 @@
+/*
+ Simple DirectMedia Layer
+ Copyright (C) 1997-2018 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"
+
+#if SDL_AUDIO_DRIVER_NACL
+
+#include "SDL_naclaudio.h"
+
+#include "SDL_audio.h"
+#include "SDL_mutex.h"
+#include "../SDL_audio_c.h"
+#include "../SDL_audiodev_c.h"
+
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/pp_instance.h"
+#include "ppapi_simple/ps.h"
+#include "ppapi_simple/ps_interface.h"
+#include "ppapi_simple/ps_event.h"
+
+/* The tag name used by NACL audio */
+#define NACLAUDIO_DRIVER_NAME "nacl"
+
+#define SAMPLE_FRAME_COUNT 4096
+
+/* Audio driver functions */
+static void nacl_audio_callback(void* samples, uint32_t buffer_size, PP_TimeDelta latency, void* data);
+
+/* FIXME: Make use of latency if needed */
+static void nacl_audio_callback(void* stream, uint32_t buffer_size, PP_TimeDelta latency, void* data) {
+ const int len = (int) buffer_size;
+ SDL_AudioDevice* _this = (SDL_AudioDevice*) data;
+ SDL_AudioCallback callback = _this->callbackspec.callback;
+
+ SDL_LockMutex(private->mutex); /* !!! FIXME: is this mutex necessary? */
+
+ /* Only do something if audio is enabled */
+ if (!SDL_AtomicGet(&_this->enabled) || SDL_AtomicGet(&_this->paused)) {
+ if (_this->stream) {
+ SDL_AudioStreamClear(_this->stream);
+ }
+ SDL_memset(stream, _this->spec.silence, len);
+ return;
+ }
+
+ SDL_assert(_this->spec.size == len);
+
+ if (_this->stream == NULL) { /* no conversion necessary. */
+ SDL_LockMutex(_this->mixer_lock);
+ callback(_this->callbackspec.userdata, stream, len);
+ SDL_UnlockMutex(_this->mixer_lock);
+ } else { /* streaming/converting */
+ const int stream_len = _this->callbackspec.size;
+ while (SDL_AudioStreamAvailable(_this->stream) < len) {
+ callback(_this->callbackspec.userdata, _this->work_buffer, stream_len);
+ if (SDL_AudioStreamPut(_this->stream, _this->work_buffer, stream_len) == -1) {
+ SDL_AudioStreamClear(_this->stream);
+ SDL_AtomicSet(&_this->enabled, 0);
+ break;
+ }
+ }
+
+ const int got = SDL_AudioStreamGet(_this->stream, stream, len);
+ SDL_assert((got < 0) || (got == len));
+ if (got != len) {
+ SDL_memset(stream, _this->spec.silence, len);
+ }
+ }
+
+ SDL_UnlockMutex(private->mutex);
+}
+
+static void NACLAUDIO_CloseDevice(SDL_AudioDevice *device) {
+ const PPB_Core *core = PSInterfaceCore();
+ const PPB_Audio *ppb_audio = PSInterfaceAudio();
+ SDL_PrivateAudioData *hidden = (SDL_PrivateAudioData *) device->hidden;
+
+ ppb_audio->StopPlayback(hidden->audio);
+ SDL_DestroyMutex(hidden->mutex);
+ core->ReleaseResource(hidden->audio);
+}
+
+static int
+NACLAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture) {
+ PP_Instance instance = PSGetInstanceId();
+ const PPB_Audio *ppb_audio = PSInterfaceAudio();
+ const PPB_AudioConfig *ppb_audiocfg = PSInterfaceAudioConfig();
+
+ private = (SDL_PrivateAudioData *) SDL_calloc(1, (sizeof *private));
+ if (private == NULL) {
+ return SDL_OutOfMemory();
+ }
+
+ private->mutex = SDL_CreateMutex();
+ _this->spec.freq = 44100;
+ _this->spec.format = AUDIO_S16LSB;
+ _this->spec.channels = 2;
+ _this->spec.samples = ppb_audiocfg->RecommendSampleFrameCount(
+ instance,
+ PP_AUDIOSAMPLERATE_44100,
+ SAMPLE_FRAME_COUNT);
+
+ /* Calculate the final parameters for this audio specification */
+ SDL_CalculateAudioSpec(&_this->spec);
+
+ private->audio = ppb_audio->Create(
+ instance,
+ ppb_audiocfg->CreateStereo16Bit(instance, PP_AUDIOSAMPLERATE_44100, _this->spec.samples),
+ nacl_audio_callback,
+ _this);
+
+ /* Start audio playback while we are still on the main thread. */
+ ppb_audio->StartPlayback(private->audio);
+
+ return 0;
+}
+
+static int
+NACLAUDIO_Init(SDL_AudioDriverImpl * impl)
+{
+ if (PSGetInstanceId() == 0) {
+ return 0;
+ }
+
+ /* Set the function pointers */
+ impl->OpenDevice = NACLAUDIO_OpenDevice;
+ impl->CloseDevice = NACLAUDIO_CloseDevice;
+ impl->OnlyHasDefaultOutputDevice = 1;
+ impl->ProvidesOwnCallbackThread = 1;
+ /*
+ * impl->WaitDevice = NACLAUDIO_WaitDevice;
+ * impl->GetDeviceBuf = NACLAUDIO_GetDeviceBuf;
+ * impl->PlayDevice = NACLAUDIO_PlayDevice;
+ * impl->Deinitialize = NACLAUDIO_Deinitialize;
+ */
+
+ return 1;
+}
+
+AudioBootStrap NACLAUDIO_bootstrap = {
+ NACLAUDIO_DRIVER_NAME, "SDL NaCl Audio Driver",
+ NACLAUDIO_Init, 0
+};
+
+#endif /* SDL_AUDIO_DRIVER_NACL */
+
+/* vi: set ts=4 sw=4 expandtab: */
diff --git a/source/3rd-party/SDL2/src/audio/nacl/SDL_naclaudio.h b/source/3rd-party/SDL2/src/audio/nacl/SDL_naclaudio.h
new file mode 100644
index 0000000..5ec842b
--- /dev/null
+++ b/source/3rd-party/SDL2/src/audio/nacl/SDL_naclaudio.h
@@ -0,0 +1,43 @@
+/*
+ Simple DirectMedia Layer
+ Copyright (C) 1997-2018 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_naclaudio_h_
+#define SDL_naclaudio_h_
+
+#include "SDL_audio.h"
+#include "../SDL_sysaudio.h"
+#include "SDL_mutex.h"
+
+#include "ppapi/c/ppb_audio.h"
+
+#define _THIS SDL_AudioDevice *_this
+#define private _this->hidden
+
+typedef struct SDL_PrivateAudioData {
+ SDL_mutex* mutex;
+ PP_Resource audio;
+} SDL_PrivateAudioData;
+
+#endif /* SDL_naclaudio_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */
generated by cgit v1.1-26-g67d0 at 2025-05-18 19:55:23 +0000