/*

Simple DirectMedia Layer

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_config.h"

#if SDL_AUDIO_DRIVER_ANDROID

/* Output audio to Android */

#include "SDL_audio.h"

#include "../SDL_audio_c.h"

#include "SDL_androidaudio.h"

#include "../../core/android/SDL_android.h"

#include <android/log.h>

static void * audioDevice;

static int

AndroidAUD_OpenDevice(_THIS, const char *devname, int iscapture)

{

SDL_AudioFormat test_format;

int valid_datatype = 0;

if (iscapture) {

//TODO: implement capture

SDL_SetError("Capture not supported on Android");

return 0;

}

if (audioDevice != NULL) {

SDL_SetError("Only one audio device at a time please!");

return 0;

}

audioDevice = this;

this->hidden = SDL_malloc(sizeof(*(this->hidden)));

if (!this->hidden) {

SDL_OutOfMemory();

return 0;

}

SDL_memset(this->hidden, 0, (sizeof *this->hidden));

test_format = SDL_FirstAudioFormat(this->spec.format);

while (test_format != 0) { // no "UNKNOWN" constant

if ((test_format == AUDIO_U8) || (test_format == AUDIO_S16LSB)) {

this->spec.format = test_format;

break;

}

test_format = SDL_NextAudioFormat();

}

if (test_format == 0) {

// Didn't find a compatible format :(

SDL_SetError("No compatible audio format!");

return 0;

}

if (this->spec.channels > 1) {

this->spec.channels = 2;

} else {

this->spec.channels = 1;

}

if (this->spec.freq < 8000) {

this->spec.freq = 8000;

}

if (this->spec.freq > 48000) {

this->spec.freq = 48000;

}

// TODO: pass in/return a (Java) device ID, also whether we're opening for input or output

this->spec.samples = Android_JNI_OpenAudioDevice(this->spec.freq, this->spec.format == AUDIO_U8 ? 0 : 1, this->spec.channels, this->spec.samples);

SDL_CalculateAudioSpec(&this->spec);

if (this->spec.samples == 0) {

// Init failed?

SDL_SetError("Java-side initialization failed!");

return 0;

}

return 1;

}

static void

AndroidAUD_PlayDevice(_THIS)

{

Android_JNI_WriteAudioBuffer();

}

static Uint8 *

AndroidAUD_GetDeviceBuf(_THIS)

{

return Android_JNI_GetAudioBuffer();

}

static void

AndroidAUD_CloseDevice(_THIS)

{

if (this->hidden != NULL) {

SDL_free(this->hidden);

this->hidden = NULL;

}

Android_JNI_CloseAudioDevice();

if (audioDevice == this) {

audioDevice = NULL;

}

}

static int

AndroidAUD_Init(SDL_AudioDriverImpl * impl)

{

/* Set the function pointers */

impl->OpenDevice = AndroidAUD_OpenDevice;

impl->PlayDevice = AndroidAUD_PlayDevice;

impl->GetDeviceBuf = AndroidAUD_GetDeviceBuf;

impl->CloseDevice = AndroidAUD_CloseDevice;

/* and the capabilities */

impl->ProvidesOwnCallbackThread = 1;

impl->HasCaptureSupport = 0; //TODO

impl->OnlyHasDefaultOutputDevice = 1;

impl->OnlyHasDefaultInputDevice = 1;

return 1; /* this audio target is available. */

}

AudioBootStrap ANDROIDAUD_bootstrap = {

};

/* Called by the Java code to start the audio processing on a thread */

void

Android_RunAudioThread()

{

SDL_RunAudio(audioDevice);

}

#endif /* SDL_AUDIO_DRIVER_ANDROID */