1#include "AudioDevice.h"
 2
 3extern "C" {
 4#include "gba.h"
 5#include "gba-audio.h"
 6#include "gba-thread.h"
 7}
 8
 9using namespace QGBA;
10
11AudioDevice::AudioDevice(QObject* parent)
12	: QIODevice(parent)
13	, m_context(nullptr)
14{
15	setOpenMode(ReadOnly);
16}
17
18void AudioDevice::setFormat(const QAudioFormat& format) {
19	if (!GBAThreadHasStarted(m_context)) {
20		return;
21	}
22	// TODO: make this thread-safe
23	m_ratio = GBAAudioCalculateRatio(&m_context->gba->audio, m_context->fpsTarget, format.sampleRate());
24}
25
26void AudioDevice::setInput(GBAThread* input) {
27	m_context = input;
28}
29
30qint64 AudioDevice::readData(char* data, qint64 maxSize) {
31	if (maxSize > 0xFFFFFFFF) {
32		maxSize = 0xFFFFFFFF;
33	}
34
35	if (!m_context->gba) {
36		return 0;
37	}
38
39	return GBAAudioResampleNN(&m_context->gba->audio, m_ratio, &m_drift, reinterpret_cast<GBAStereoSample*>(data), maxSize / sizeof(GBAStereoSample)) * sizeof(GBAStereoSample);
40}
41
42qint64 AudioDevice::writeData(const char*, qint64) {
43	return 0;
44}