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0e45984fa0
The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
153 lines
4.9 KiB
C
153 lines
4.9 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_AUDIO_DRIVER_NACL
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#include "SDL_naclaudio.h"
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#include "SDL_audio.h"
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#include "SDL_mutex.h"
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#include "../SDL_audiomem.h"
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#include "../SDL_audio_c.h"
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#include "../SDL_audiodev_c.h"
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#include "ppapi/c/pp_errors.h"
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#include "ppapi/c/pp_instance.h"
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#include "ppapi_simple/ps.h"
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#include "ppapi_simple/ps_interface.h"
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#include "ppapi_simple/ps_event.h"
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/* The tag name used by NACL audio */
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#define NACLAUD_DRIVER_NAME "nacl"
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#define SAMPLE_FRAME_COUNT 4096
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/* Audio driver functions */
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static int NACLAUD_OpenDevice(_THIS, void *handle, const char *devname, int iscapture);
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static void NACLAUD_CloseDevice(_THIS);
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static void nacl_audio_callback(void* samples, uint32_t buffer_size, PP_TimeDelta latency, void* data);
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/* FIXME: Make use of latency if needed */
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static void nacl_audio_callback(void* samples, uint32_t buffer_size, PP_TimeDelta latency, void* data) {
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SDL_AudioDevice* _this = (SDL_AudioDevice*) data;
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SDL_LockMutex(private->mutex);
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if (_this->enabled && !_this->paused) {
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if (_this->convert.needed) {
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SDL_LockMutex(_this->mixer_lock);
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(*_this->spec.callback) (_this->spec.userdata,
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(Uint8 *) _this->convert.buf,
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_this->convert.len);
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SDL_UnlockMutex(_this->mixer_lock);
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SDL_ConvertAudio(&_this->convert);
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SDL_memcpy(samples, _this->convert.buf, _this->convert.len_cvt);
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} else {
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SDL_LockMutex(_this->mixer_lock);
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(*_this->spec.callback) (_this->spec.userdata, (Uint8 *) samples, buffer_size);
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SDL_UnlockMutex(_this->mixer_lock);
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}
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} else {
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SDL_memset(samples, 0, buffer_size);
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}
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return;
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}
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static void NACLAUD_CloseDevice(SDL_AudioDevice *device) {
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const PPB_Core *core = PSInterfaceCore();
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const PPB_Audio *ppb_audio = PSInterfaceAudio();
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SDL_PrivateAudioData *hidden = (SDL_PrivateAudioData *) device->hidden;
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ppb_audio->StopPlayback(hidden->audio);
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SDL_DestroyMutex(hidden->mutex);
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core->ReleaseResource(hidden->audio);
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}
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static int
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NACLAUD_OpenDevice(_THIS, void *handle, const char *devname, int iscapture) {
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PP_Instance instance = PSGetInstanceId();
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const PPB_Audio *ppb_audio = PSInterfaceAudio();
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const PPB_AudioConfig *ppb_audiocfg = PSInterfaceAudioConfig();
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private = (SDL_PrivateAudioData *) SDL_calloc(1, (sizeof *private));
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if (private == NULL) {
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SDL_OutOfMemory();
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return 0;
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}
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private->mutex = SDL_CreateMutex();
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_this->spec.freq = 44100;
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_this->spec.format = AUDIO_S16LSB;
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_this->spec.channels = 2;
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_this->spec.samples = ppb_audiocfg->RecommendSampleFrameCount(
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instance,
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PP_AUDIOSAMPLERATE_44100,
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SAMPLE_FRAME_COUNT);
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/* Calculate the final parameters for this audio specification */
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SDL_CalculateAudioSpec(&_this->spec);
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private->audio = ppb_audio->Create(
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instance,
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ppb_audiocfg->CreateStereo16Bit(instance, PP_AUDIOSAMPLERATE_44100, _this->spec.samples),
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nacl_audio_callback,
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_this);
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/* Start audio playback while we are still on the main thread. */
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ppb_audio->StartPlayback(private->audio);
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return 1;
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}
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static int
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NACLAUD_Init(SDL_AudioDriverImpl * impl)
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{
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if (PSGetInstanceId() == 0) {
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return 0;
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}
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/* Set the function pointers */
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impl->OpenDevice = NACLAUD_OpenDevice;
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impl->CloseDevice = NACLAUD_CloseDevice;
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impl->OnlyHasDefaultOutputDevice = 1;
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impl->ProvidesOwnCallbackThread = 1;
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/*
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* impl->WaitDevice = NACLAUD_WaitDevice;
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* impl->GetDeviceBuf = NACLAUD_GetDeviceBuf;
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* impl->PlayDevice = NACLAUD_PlayDevice;
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* impl->Deinitialize = NACLAUD_Deinitialize;
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*/
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return 1;
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}
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AudioBootStrap NACLAUD_bootstrap = {
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NACLAUD_DRIVER_NAME, "SDL NaCl Audio Driver",
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NACLAUD_Init, 0
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};
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#endif /* SDL_AUDIO_DRIVER_NACL */
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/* vi: set ts=4 sw=4 expandtab: */
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