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PSP2: Slightly cleaner audio

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This commit is contained in:
Jeffrey Pfau 2016-08-06 14:05:05 -07:00
parent 8b6a6ff2c4
commit b94b598dd4
1 changed files with 17 additions and 25 deletions
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42
src/platform/psp2/psp2-context.c
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@ -17,8 +17,8 @@
#include "feature/gui/gui-runner.h"
#include "gba/input.h"
#include "util/circle-buffer.h"
#include "util/memory.h"
#include "util/ring-fifo.h"
#include "util/threading.h"
#include "util/vfs.h"
#include "platform/psp2/sce-vfs.h"
@ -54,10 +54,11 @@ extern const uint8_t _binary_backdrop_png_start[];
static vita2d_texture* backdrop = 0;
#define PSP2_SAMPLES 64
#define PSP2_AUDIO_BUFFER_SIZE (PSP2_SAMPLES * 19)
#define PSP2_AUDIO_BUFFER_SIZE (PSP2_SAMPLES * 40)
static struct mPSP2AudioContext {
struct CircleBuffer buffer;
struct RingFIFO buffer;
size_t samples;
Mutex mutex;
Condition cond;
bool running;
@ -69,25 +70,22 @@ static void _mapVitaKey(struct mInputMap* map, int pspKey, enum GBAKey key) {
static THREAD_ENTRY _audioThread(void* context) {
struct mPSP2AudioContext* audio = (struct mPSP2AudioContext*) context;
struct GBAStereoSample buffer[PSP2_SAMPLES];
int audioPort = sceAudioOutOpenPort(SCE_AUDIO_OUT_PORT_TYPE_MAIN, PSP2_SAMPLES, 48000, SCE_AUDIO_OUT_MODE_STEREO);
while (audio->running) {
memset(buffer, 0, sizeof(buffer));
MutexLock(&audio->mutex);
int len = CircleBufferSize(&audio->buffer);
len /= sizeof(buffer[0]);
int len = audio->samples;
if (len > PSP2_SAMPLES) {
len = PSP2_SAMPLES;
}
if (len > 0) {
len &= ~(SCE_AUDIO_MIN_LEN - 1);
CircleBufferRead(&audio->buffer, buffer, len * sizeof(buffer[0]));
MutexUnlock(&audio->mutex);
sceAudioOutOutput(audioPort, buffer);
MutexLock(&audio->mutex);
}
struct GBAStereoSample* buffer = audio->buffer.readPtr;
RingFIFORead(&audio->buffer, NULL, len * 4);
audio->samples -= len;
if (CircleBufferSize(&audio->buffer) < PSP2_SAMPLES) {
MutexUnlock(&audio->mutex);
sceAudioOutOutput(audioPort, buffer);
MutexLock(&audio->mutex);
if (audio->samples < PSP2_SAMPLES) {
ConditionWait(&audio->cond, &audio->mutex);
}
MutexUnlock(&audio->mutex);
@ -206,7 +204,7 @@ void mPSP2LoadROM(struct mGUIRunner* runner) {
break;
}
CircleBufferInit(&audioContext.buffer, PSP2_AUDIO_BUFFER_SIZE * sizeof(struct GBAStereoSample));
RingFIFOInit(&audioContext.buffer, PSP2_AUDIO_BUFFER_SIZE * sizeof(struct GBAStereoSample), PSP2_SAMPLES * 4);
MutexInit(&audioContext.mutex);
ConditionInit(&audioContext.cond);
audioContext.running = true;
@ -216,17 +214,11 @@ void mPSP2LoadROM(struct mGUIRunner* runner) {
void mPSP2PrepareForFrame(struct mGUIRunner* runner) {
MutexLock(&audioContext.mutex);
while (blip_samples_avail(runner->core->getAudioChannel(runner->core, 0)) >= PSP2_SAMPLES) {
if (CircleBufferSize(&audioContext.buffer) + PSP2_SAMPLES * sizeof(struct GBAStereoSample) > CircleBufferCapacity(&audioContext.buffer)) {
break;
}
struct GBAStereoSample samples[PSP2_SAMPLES];
struct GBAStereoSample* samples = audioContext.buffer.writePtr;
blip_read_samples(runner->core->getAudioChannel(runner->core, 0), &samples[0].left, PSP2_SAMPLES, true);
blip_read_samples(runner->core->getAudioChannel(runner->core, 1), &samples[0].right, PSP2_SAMPLES, true);
int i;
for (i = 0; i < PSP2_SAMPLES; ++i) {
CircleBufferWrite16(&audioContext.buffer, samples[i].left);
CircleBufferWrite16(&audioContext.buffer, samples[i].right);
}
RingFIFOWrite(&audioContext.buffer, NULL, PSP2_SAMPLES * 4);
audioContext.samples += PSP2_SAMPLES;
}
ConditionWake(&audioContext.cond);
MutexUnlock(&audioContext.mutex);