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src/Codec/AACEncoder.cpp

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+/*
+ * AACEncoder.cpp
+ *
+ *  Created on: 2016年8月11日
+ *      Author: xzl
+ */
+#ifdef ENABLE_FAAC
+#include "AACEncoder.h"
+#include "Util/logger.h"
+#include <cstdlib>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <faac.h>
+
+#ifdef __cplusplus
+}
+#endif
+
+using namespace ZL::Util;
+
+namespace ZL {
+namespace Codec {
+
+AACEncoder::AACEncoder() {
+
+}
+
+AACEncoder::~AACEncoder() {
+	if (m_hEncoder != nullptr) {
+		faacEncClose(m_hEncoder);
+		m_hEncoder = nullptr;
+	}
+	if (m_pucAacBuf != nullptr) {
+		delete[] m_pucAacBuf;
+		m_pucAacBuf = nullptr;
+	}
+	if (m_pucPcmBuf != nullptr) {
+		delete[] m_pucPcmBuf;
+		m_pucPcmBuf = nullptr;
+	}
+}
+
+bool AACEncoder::init(int iSampleRate, int iChannels, int iSampleBit) {
+	if (iSampleBit != 16) {
+		return false;
+	}
+	// (1) Open FAAC engine
+	m_hEncoder = faacEncOpen(iSampleRate, iChannels, &m_ulInputSamples,
+			&m_ulMaxOutputBytes);
+	if (m_hEncoder == NULL) {
+		return false;
+	}
+	m_pucAacBuf = new unsigned char[m_ulMaxOutputBytes];
+	m_ulMaxInputBytes = m_ulInputSamples * iSampleBit / 8;
+	m_pucPcmBuf = new unsigned char[m_ulMaxInputBytes * 4];
+
+	// (2.1) Get current encoding configuration
+	faacEncConfigurationPtr pConfiguration = faacEncGetCurrentConfiguration(m_hEncoder);
+	if (pConfiguration == NULL) {
+		faacEncClose(m_hEncoder);
+		return false;
+	}
+	pConfiguration->aacObjectType =LOW;
+	pConfiguration->mpegVersion = 4;
+	pConfiguration->useTns = 1;
+	pConfiguration->shortctl = SHORTCTL_NORMAL;
+	pConfiguration->useLfe = 1;
+	pConfiguration->allowMidside = 1;
+	pConfiguration->bitRate = 0;
+	pConfiguration->bandWidth = 0;
+	pConfiguration->quantqual = 50;
+	pConfiguration->outputFormat = 1;
+	pConfiguration->inputFormat = FAAC_INPUT_16BIT;
+
+	// (2.2) Set encoding configuration
+	if(!faacEncSetConfiguration(m_hEncoder, pConfiguration)){
+		ErrorL << "faacEncSetConfiguration failed";
+		faacEncClose(m_hEncoder);
+		return false;
+	}
+	return true;
+}
+
+int AACEncoder::inputData(char *pcPcmBufr, int iLen, unsigned char **ppucOutBuffer) {
+	memcpy(m_pucPcmBuf + m_uiPcmLen, pcPcmBufr, iLen);
+	m_uiPcmLen += iLen;
+	if (m_uiPcmLen < m_ulMaxInputBytes) {
+		return 0;
+	}
+
+	int nRet = faacEncEncode(m_hEncoder, (int32_t *) (m_pucPcmBuf), m_ulInputSamples, m_pucAacBuf, m_ulMaxOutputBytes);
+	m_uiPcmLen -= m_ulMaxInputBytes;
+	memmove(m_pucPcmBuf, m_pucPcmBuf + m_ulMaxInputBytes, m_uiPcmLen);
+	*ppucOutBuffer = m_pucAacBuf;
+	return nRet;
+}
+
+} /* namespace Codec */
+} /* namespace ZL */
+
+#endif //ENABLE_FAAC
+
+
+
+
+
+