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android: implement audio capture support.

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This commit is contained in:
Ryan C. Gordon
2016-08-11 22:04:49 -04:00
parent b78ec97496
commit 8f0af77354
5 changed files with 250 additions and 49 deletions
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73
src/audio/android/SDL_androidaudio.c
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@@ -24,6 +24,7 @@
/* Output audio to Android */
#include "SDL_assert.h"
#include "SDL_audio.h"
#include "../SDL_audio_c.h"
#include "SDL_androidaudio.h"
@@ -33,24 +34,22 @@
#include <android/log.h>
static SDL_AudioDevice* audioDevice = NULL;
static SDL_AudioDevice* captureDevice = NULL;
static int
AndroidAUD_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) {
/* TODO: implement capture */
return SDL_SetError("Capture not supported on Android");
captureDevice = this;
} else {
audioDevice = this;
}
/* !!! FIXME: higher level will prevent this now. Lose this check (and global?). */
if (audioDevice != NULL) {
return SDL_SetError("Only one audio device at a time please!");
}
audioDevice = this;
this->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, (sizeof *this->hidden));
if (this->hidden == NULL) {
return SDL_OutOfMemory();
@@ -83,15 +82,16 @@ AndroidAUD_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
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);
/* TODO: pass in/return a (Java) device ID */
this->spec.samples = Android_JNI_OpenAudioDevice(iscapture, this->spec.freq, this->spec.format == AUDIO_U8 ? 0 : 1, this->spec.channels, this->spec.samples);
if (this->spec.samples == 0) {
/* Init failed? */
return SDL_SetError("Java-side initialization failed!");
}
SDL_CalculateAudioSpec(&this->spec);
return 0;
}
@@ -107,18 +107,33 @@ AndroidAUD_GetDeviceBuf(_THIS)
return Android_JNI_GetAudioBuffer();
}
static int
AndroidAUD_CaptureFromDevice(_THIS, void *buffer, int buflen)
{
return Android_JNI_CaptureAudioBuffer(buffer, buflen);
}
static void
AndroidAUD_FlushCapture(_THIS)
{
Android_JNI_FlushCapturedAudio();
}
static void
AndroidAUD_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();
if (audioDevice == this) {
SDL_free(this->hidden);
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
@@ -129,9 +144,11 @@ AndroidAUD_Init(SDL_AudioDriverImpl * impl)
impl->PlayDevice = AndroidAUD_PlayDevice;
impl->GetDeviceBuf = AndroidAUD_GetDeviceBuf;
impl->CloseDevice = AndroidAUD_CloseDevice;
impl->CaptureFromDevice = AndroidAUD_CaptureFromDevice;
impl->FlushCapture = AndroidAUD_FlushCapture;
/* and the capabilities */
impl->HasCaptureSupport = 0; /* TODO */
impl->HasCaptureSupport = SDL_TRUE;
impl->OnlyHasDefaultOutputDevice = 1;
impl->OnlyHasDefaultCaptureDevice = 1;
@@ -159,6 +176,19 @@ void AndroidAUD_PauseDevices(void)
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 */
@@ -174,6 +204,15 @@ void AndroidAUD_ResumeDevices(void)
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);
}
}
}