diff options
Diffstat (limited to 'Source/external/SDL2/src/audio/android/SDL_androidaudio.c')
| -rw-r--r-- | Source/external/SDL2/src/audio/android/SDL_androidaudio.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/Source/external/SDL2/src/audio/android/SDL_androidaudio.c b/Source/external/SDL2/src/audio/android/SDL_androidaudio.c new file mode 100644 index 0000000..77a5f0d --- /dev/null +++ b/Source/external/SDL2/src/audio/android/SDL_androidaudio.c @@ -0,0 +1,211 @@ +/* + 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_ANDROID + +/* Output audio to Android */ + +#include "SDL_assert.h" +#include "SDL_audio.h" +#include "../SDL_audio_c.h" +#include "SDL_androidaudio.h" + +#include "../../core/android/SDL_android.h" + +#include <android/log.h> + +static SDL_AudioDevice* audioDevice = NULL; +static SDL_AudioDevice* captureDevice = NULL; + +static int +ANDROIDAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture) +{ + SDL_AudioFormat test_format; + + SDL_assert((captureDevice == NULL) || !iscapture); + SDL_assert((audioDevice == NULL) || iscapture); + + if (iscapture) { + captureDevice = this; + } else { + audioDevice = this; + } + + this->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, (sizeof *this->hidden)); + if (this->hidden == NULL) { + return SDL_OutOfMemory(); + } + + test_format = SDL_FirstAudioFormat(this->spec.format); + while (test_format != 0) { /* no "UNKNOWN" constant */ + if ((test_format == AUDIO_U8) || + (test_format == AUDIO_S16) || + (test_format == AUDIO_F32)) { + this->spec.format = test_format; + break; + } + test_format = SDL_NextAudioFormat(); + } + + if (test_format == 0) { + /* Didn't find a compatible format :( */ + return SDL_SetError("No compatible audio format!"); + } + + if (Android_JNI_OpenAudioDevice(iscapture, &this->spec) < 0) { + return -1; + } + + SDL_CalculateAudioSpec(&this->spec); + + return 0; +} + +static void +ANDROIDAUDIO_PlayDevice(_THIS) +{ + Android_JNI_WriteAudioBuffer(); +} + +static Uint8 * +ANDROIDAUDIO_GetDeviceBuf(_THIS) +{ + return Android_JNI_GetAudioBuffer(); +} + +static int +ANDROIDAUDIO_CaptureFromDevice(_THIS, void *buffer, int buflen) +{ + return Android_JNI_CaptureAudioBuffer(buffer, buflen); +} + +static void +ANDROIDAUDIO_FlushCapture(_THIS) +{ + Android_JNI_FlushCapturedAudio(); +} + +static void +ANDROIDAUDIO_CloseDevice(_THIS) +{ + /* At this point SDL_CloseAudioDevice via close_audio_device took care of terminating the audio thread + so it's safe to terminate the Java side buffer and AudioTrack + */ + Android_JNI_CloseAudioDevice(this->iscapture); + if (this->iscapture) { + SDL_assert(captureDevice == this); + captureDevice = NULL; + } else { + SDL_assert(audioDevice == this); + audioDevice = NULL; + } + SDL_free(this->hidden); +} + +static int +ANDROIDAUDIO_Init(SDL_AudioDriverImpl * impl) +{ + /* Set the function pointers */ + impl->OpenDevice = ANDROIDAUDIO_OpenDevice; + impl->PlayDevice = ANDROIDAUDIO_PlayDevice; + impl->GetDeviceBuf = ANDROIDAUDIO_GetDeviceBuf; + impl->CloseDevice = ANDROIDAUDIO_CloseDevice; + impl->CaptureFromDevice = ANDROIDAUDIO_CaptureFromDevice; + impl->FlushCapture = ANDROIDAUDIO_FlushCapture; + + /* and the capabilities */ + impl->HasCaptureSupport = SDL_TRUE; + impl->OnlyHasDefaultOutputDevice = 1; + impl->OnlyHasDefaultCaptureDevice = 1; + + return 1; /* this audio target is available. */ +} + +AudioBootStrap ANDROIDAUDIO_bootstrap = { + "android", "SDL Android audio driver", ANDROIDAUDIO_Init, 0 +}; + +/* Pause (block) all non already paused audio devices by taking their mixer lock */ +void ANDROIDAUDIO_PauseDevices(void) +{ + /* TODO: Handle multiple devices? */ + struct SDL_PrivateAudioData *private; + if(audioDevice != NULL && audioDevice->hidden != NULL) { + private = (struct SDL_PrivateAudioData *) audioDevice->hidden; + if (SDL_AtomicGet(&audioDevice->paused)) { + /* The device is already paused, leave it alone */ + private->resume = SDL_FALSE; + } + else { + SDL_LockMutex(audioDevice->mixer_lock); + SDL_AtomicSet(&audioDevice->paused, 1); + private->resume = SDL_TRUE; + } + } + + if(captureDevice != NULL && captureDevice->hidden != NULL) { + private = (struct SDL_PrivateAudioData *) captureDevice->hidden; + if (SDL_AtomicGet(&captureDevice->paused)) { + /* The device is already paused, leave it alone */ + private->resume = SDL_FALSE; + } + else { + SDL_LockMutex(captureDevice->mixer_lock); + SDL_AtomicSet(&captureDevice->paused, 1); + private->resume = SDL_TRUE; + } + } +} + +/* Resume (unblock) all non already paused audio devices by releasing their mixer lock */ +void ANDROIDAUDIO_ResumeDevices(void) +{ + /* TODO: Handle multiple devices? */ + struct SDL_PrivateAudioData *private; + if(audioDevice != NULL && audioDevice->hidden != NULL) { + private = (struct SDL_PrivateAudioData *) audioDevice->hidden; + if (private->resume) { + SDL_AtomicSet(&audioDevice->paused, 0); + private->resume = SDL_FALSE; + SDL_UnlockMutex(audioDevice->mixer_lock); + } + } + + if(captureDevice != NULL && captureDevice->hidden != NULL) { + private = (struct SDL_PrivateAudioData *) captureDevice->hidden; + if (private->resume) { + SDL_AtomicSet(&captureDevice->paused, 0); + private->resume = SDL_FALSE; + SDL_UnlockMutex(captureDevice->mixer_lock); + } + } +} + +#else + +void ANDROIDAUDIO_ResumeDevices(void) {} +void ANDROIDAUDIO_PauseDevices(void) {} + +#endif /* SDL_AUDIO_DRIVER_ANDROID */ + +/* vi: set ts=4 sw=4 expandtab: */ + |