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/**
* @file coreaudio/recorder.c Apple Coreaudio sound driver - recorder
*
* Copyright (C) 2010 Creytiv.com
*/
#include <AudioToolbox/AudioQueue.h>
#include <unistd.h>
#include <pthread.h>
#include <re.h>
#include <rem.h>
#include <baresip.h>
#include "coreaudio.h"
#define BUFC 3
struct ausrc_st {
struct ausrc *as; /* inheritance */
AudioQueueRef queue;
AudioQueueBufferRef buf[BUFC];
pthread_mutex_t mutex;
ausrc_read_h *rh;
void *arg;
unsigned int ptime;
};
static void ausrc_destructor(void *arg)
{
struct ausrc_st *st = arg;
uint32_t i;
pthread_mutex_lock(&st->mutex);
st->rh = NULL;
pthread_mutex_unlock(&st->mutex);
audio_session_disable();
if (st->queue) {
AudioQueuePause(st->queue);
AudioQueueStop(st->queue, true);
for (i=0; i<ARRAY_SIZE(st->buf); i++)
if (st->buf[i])
AudioQueueFreeBuffer(st->queue, st->buf[i]);
AudioQueueDispose(st->queue, true);
}
mem_deref(st->as);
pthread_mutex_destroy(&st->mutex);
}
static void record_handler(void *userData, AudioQueueRef inQ,
AudioQueueBufferRef inQB,
const AudioTimeStamp *inStartTime,
UInt32 inNumPackets,
const AudioStreamPacketDescription *inPacketDesc)
{
struct ausrc_st *st = userData;
unsigned int ptime;
ausrc_read_h *rh;
void *arg;
(void)inStartTime;
(void)inNumPackets;
(void)inPacketDesc;
pthread_mutex_lock(&st->mutex);
ptime = st->ptime;
rh = st->rh;
arg = st->arg;
pthread_mutex_unlock(&st->mutex);
if (!rh)
return;
rh(inQB->mAudioData, inQB->mAudioDataByteSize/2, arg);
AudioQueueEnqueueBuffer(inQ, inQB, 0, NULL);
/* Force a sleep here, coreaudio's timing is too fast */
#if !TARGET_OS_IPHONE
#define ENCODE_TIME 1000
usleep((ptime * 1000) - ENCODE_TIME);
#endif
}
int coreaudio_recorder_alloc(struct ausrc_st **stp, struct ausrc *as,
struct media_ctx **ctx,
struct ausrc_prm *prm, const char *device,
ausrc_read_h *rh, ausrc_error_h *errh, void *arg)
{
AudioStreamBasicDescription fmt;
struct ausrc_st *st;
uint32_t sampc, bytc, i;
OSStatus status;
int err;
(void)ctx;
(void)device;
(void)errh;
if (!stp || !as || !prm)
return EINVAL;
st = mem_zalloc(sizeof(*st), ausrc_destructor);
if (!st)
return ENOMEM;
st->ptime = prm->ptime;
st->as = mem_ref(as);
st->rh = rh;
st->arg = arg;
sampc = prm->srate * prm->ch * prm->ptime / 1000;
bytc = sampc * 2;
err = pthread_mutex_init(&st->mutex, NULL);
if (err)
goto out;
err = audio_session_enable();
if (err)
goto out;
fmt.mSampleRate = (Float64)prm->srate;
fmt.mFormatID = kAudioFormatLinearPCM;
fmt.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger |
kAudioFormatFlagIsPacked;
#ifdef __BIG_ENDIAN__
fmt.mFormatFlags |= kAudioFormatFlagIsBigEndian;
#endif
fmt.mFramesPerPacket = 1;
fmt.mBytesPerFrame = prm->ch * 2;
fmt.mBytesPerPacket = prm->ch * 2;
fmt.mChannelsPerFrame = prm->ch;
fmt.mBitsPerChannel = 16;
status = AudioQueueNewInput(&fmt, record_handler, st, NULL,
kCFRunLoopCommonModes, 0, &st->queue);
if (status) {
warning("coreaudio: AudioQueueNewInput error: %i\n", status);
err = ENODEV;
goto out;
}
for (i=0; i<ARRAY_SIZE(st->buf); i++) {
status = AudioQueueAllocateBuffer(st->queue, bytc,
&st->buf[i]);
if (status) {
err = ENOMEM;
goto out;
}
AudioQueueEnqueueBuffer(st->queue, st->buf[i], 0, NULL);
}
status = AudioQueueStart(st->queue, NULL);
if (status) {
warning("coreaudio: AudioQueueStart error %i\n", status);
err = ENODEV;
goto out;
}
out:
if (err)
mem_deref(st);
else
*stp = st;
return err;
}
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