137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
/*
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this file is basically a copy of the SDL one
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java code has a function or two which just periodically calls us to ask us to dump out audio for it
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*/
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#include "quakedef.h"
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#include <jni.h>
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#include <pthread.h>
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static soundcardinfo_t *sys_sc = NULL;
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extern int sys_soundflags;
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//called by the java code when it wants to know what sort of AudioTrack format to use.
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JNIEXPORT jint JNICALL Java_com_fteqw_FTEDroidEngine_audioinfo(JNIEnv *env, jclass this, jint arg)
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{
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soundcardinfo_t *sc = sys_sc;
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if (!sc)
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return 0;
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switch(arg)
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{
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case 1:
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return sc->sn.numchannels;
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case 2:
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return sc->sn.samplebits;
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default:
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return sc->sn.speed;
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}
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}
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//transfer the 'dma' buffer into the buffer it requests, called from a dedicated sound thread created by the java code.
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JNIEXPORT jint JNICALL Java_com_fteqw_FTEDroidEngine_paintaudio(JNIEnv *env, jclass this, jbyteArray stream, jint len)
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{
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int offset = 0;
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soundcardinfo_t *sc = sys_sc;
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int framesz;
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if (sc)
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{
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int buffersize = sc->sn.samples*sc->sn.samplebits/8;
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int curtime = GetSoundtime(sc);
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framesz = sc->sn.numchannels * sc->sn.samplebits/8;
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S_PaintChannels (sc, curtime + (len / framesz));
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if (len > buffersize)
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{
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len = buffersize; //whoa nellie!
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}
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if (len + sc->snd_sent%buffersize > buffersize)
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{ //buffer will wrap, fill in the rest
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(*env)->SetByteArrayRegion(env, stream, offset, buffersize - (sc->snd_sent%buffersize), (char*)sc->sn.buffer + (sc->snd_sent%buffersize));
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offset += buffersize - (sc->snd_sent%buffersize);
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sc->snd_sent += buffersize - (sc->snd_sent%buffersize);
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len -= buffersize - (sc->snd_sent%buffersize);
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if (len < 0) /*this must be impossible, surely?*/
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len = 0;
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}
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//and finish from the start
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(*env)->SetByteArrayRegion(env, stream, offset, len, (char*)sc->sn.buffer + (sc->snd_sent%buffersize));
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offset += len;
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sc->snd_sent += len;
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}
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else
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offset = len; /*so the playback thread ends up blocked properly*/
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return offset;
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}
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static void Droid_Shutdown(soundcardinfo_t *sc)
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{
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//fixme: what if we're currently inside Java_com_fteqw_FTEDroidEngine_paintaudio?
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sys_sc = NULL;
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free(sc->sn.buffer);
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sys_soundflags = 0;
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}
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//return the number of samples that have already been submitted to the device.
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static unsigned int Droid_GetDMAPos(soundcardinfo_t *sc)
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{
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sc->sn.samplepos = sc->snd_sent / (sc->sn.samplebits/8);
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return sc->sn.samplepos;
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}
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static void Droid_UnlockBuffer(soundcardinfo_t *sc, void *buffer)
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{
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}
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static void *Droid_LockBuffer(soundcardinfo_t *sc, unsigned int *sampidx)
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{
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return sc->sn.buffer;
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}
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static void Droid_SetUnderWater(soundcardinfo_t *sc, qboolean uw)
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{
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}
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static void Droid_Submit(soundcardinfo_t *sc, int start, int end)
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{
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}
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//on android, 16bit audio is 'guarenteed'.
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//8bit is not guarenteed.
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//there's no reference to sample rates. I assume 44.1khz will always work, though we want to avoid that cpu+mem load if we can
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//nor any guarentee about channels supported. I assume mono will always work.
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static int Droid_InitCard (soundcardinfo_t *sc, int cardnum)
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{
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if (sys_sc)
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return 2;
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sc->selfpainting = true;
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// sc->sn.speed = 11025;
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// sc->sn.samplebits = 16;
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// sc->sn.numchannels = 1;
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/*internal buffer should have 1 sec audio*/
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sc->sn.samples = sc->sn.speed*sc->sn.numchannels;
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sc->Lock = Droid_LockBuffer;
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sc->Unlock = Droid_UnlockBuffer;
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sc->SetWaterDistortion = Droid_SetUnderWater;
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sc->Submit = Droid_Submit;
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sc->Shutdown = Droid_Shutdown;
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sc->GetDMAPos = Droid_GetDMAPos;
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sc->sn.buffer = malloc(sc->sn.samples*sc->sn.samplebits/8);
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sys_sc = sc;
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sys_soundflags = 3;
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return 1;
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}
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int (*pDroid_InitCard) (soundcardinfo_t *sc, int cardnum) = &Droid_InitCard;
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