Apple-2-Tools/kegs-android
1
0
Fork 0
mirror of https://github.com/jamessanford/kegs.git synced 2024-06-09 12:29:28 +00:00
Code Issues Projects Releases Wiki Activity

Replace crazy KEGS sound buffer with my own crazy sound buffer.

Browse Source
This commit is contained in:
James Sanford 2012-08-12 13:21:26 -07:00
parent 2b5248d2fb
commit e006a12421
1 changed files with 35 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

58
jni/android_sound_driver.c
View File

@ -32,9 +32,6 @@ static SLAndroidSimpleBufferQueueItf bqPlayerBufferQueue;
static SLVolumeItf bqPlayerVolume;
#define MACSND_REBUF_SIZE (64*1024)
#define MACSND_QUANTA 512
/* MACSND_QUANTA must be >= 128 and a power of 2 */
word32 g_macsnd_rebuf[MACSND_REBUF_SIZE];
volatile word32 *g_macsnd_rebuf_ptr;
volatile word32 *g_macsnd_rebuf_cur;
@ -42,32 +39,47 @@ volatile int g_macsnd_playing = 0;
void bqPlayerCallback(SLAndroidSimpleBufferQueueItf bq, void *context)
{
int samps;
assert(bq == bqPlayerBufferQueue);
assert(NULL == context);
samps = g_macsnd_rebuf_ptr - g_macsnd_rebuf_cur;
if(samps < 0) {
samps += MACSND_REBUF_SIZE;
}
samps = samps & -(MACSND_QUANTA); // quantize to 1024 samples
if(g_macsnd_rebuf_cur + samps > &(g_macsnd_rebuf[MACSND_REBUF_SIZE])) {
samps = &(g_macsnd_rebuf[MACSND_REBUF_SIZE]) - g_macsnd_rebuf_cur;
}
if(samps > 0) {
g_macsnd_playing = 1;
// Read volatile items once.
word32 *buf_ptr = (word32 *)g_macsnd_rebuf_ptr; // where new data is being written
word32 *buf_cur = (word32 *)g_macsnd_rebuf_cur; // where we play from
SLresult result;
result = (*bqPlayerBufferQueue)->Enqueue(bqPlayerBufferQueue, (char *)g_macsnd_rebuf_cur, samps * 4);
assert(SL_RESULT_SUCCESS == result);
g_macsnd_rebuf_cur += samps;
if(g_macsnd_rebuf_cur >= &(g_macsnd_rebuf[MACSND_REBUF_SIZE])) {
g_macsnd_rebuf_cur -= MACSND_REBUF_SIZE;
}
} else {
// Bail early so g_macsnd_playing can be reset.
if (buf_ptr == buf_cur) {
g_macsnd_playing = 0;
return;
}
g_macsnd_playing = 1;
// Play g_macsnd_rebuf_cur to EITHER
// g_macsnd_rebuf_ptr
// OR
// &g_macsnd_rebuf[MACSND_REBUF_SIZE]
word32 *last;
if (buf_ptr < buf_cur) {
// new data has wrapped around, only play to the end of the buffer.
last = &g_macsnd_rebuf[MACSND_REBUF_SIZE];
} else {
// play to buf_ptr
last = buf_ptr;
}
int samps;
samps = last - buf_cur;
samps = MIN(samps, 768);
// Where we'll start playing from next time.
if (&buf_cur[samps] == &g_macsnd_rebuf[MACSND_REBUF_SIZE]) {
g_macsnd_rebuf_cur = &g_macsnd_rebuf[0];
} else {
g_macsnd_rebuf_cur = &buf_cur[samps];
}
SLresult result;
result = (*bqPlayerBufferQueue)->Enqueue(bqPlayerBufferQueue, (char *)buf_cur, samps * 4);
assert(SL_RESULT_SUCCESS == result);
}
int android_send_audio(byte *ptr, int in_size) {