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/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is MPEG4IP.
*
* The Initial Developer of the Original Code is Cisco Systems Inc.
* Portions created by Cisco Systems Inc. are
* Copyright (C) Cisco Systems Inc. 2000-2002. All Rights Reserved.
*
* Contributor(s):
* Dave Mackie dmackie@cisco.com
*/
#include "mp4live.h"
#include "audio_encoder.h"
#ifdef ADD_LAME_ENCODER
#include "audio_lame.h"
#endif
#ifdef ADD_FAAC_ENCODER
#include "audio_faac.h"
#endif
CAudioEncoder* AudioEncoderCreate(const char* encoderName)
{
if (!strcasecmp(encoderName, AUDIO_ENCODER_FAAC)) {
#ifdef ADD_FAAC_ENCODER
return new CFaacAudioEncoder();
#else
error_message("faac encoder not available in this build");
return false;
#endif
} else if (!strcasecmp(encoderName, AUDIO_ENCODER_LAME)) {
#ifdef ADD_LAME_ENCODER
return new CLameAudioEncoder();
#else
error_message("lame encoder not available in this build");
#endif
} else {
error_message("unknown encoder specified");
}
return NULL;
}
bool CAudioEncoder::InterleaveStereoSamples(
u_int16_t* pLeftBuffer,
u_int16_t* pRightBuffer,
u_int32_t srcNumSamples,
u_int16_t** ppDstBuffer)
{
if (*ppDstBuffer == NULL) {
*ppDstBuffer =
(u_int16_t*)malloc(srcNumSamples * 2 * sizeof(u_int16_t));
if (*ppDstBuffer == NULL) {
return false;
}
}
for (u_int32_t i = 0; i < srcNumSamples; i++) {
(*ppDstBuffer)[(i << 1)] = pLeftBuffer[i];
(*ppDstBuffer)[(i << 1) + 1] = pRightBuffer[i];
}
return true;
}
bool CAudioEncoder::DeinterleaveStereoSamples(
u_int16_t* pSrcBuffer,
u_int32_t srcNumSamples,
u_int16_t** ppLeftBuffer,
u_int16_t** ppRightBuffer)
{
bool mallocedLeft = false;
if (*ppLeftBuffer == NULL) {
*ppLeftBuffer =
(u_int16_t*)malloc((srcNumSamples >> 1) * sizeof(u_int16_t));
if (*ppLeftBuffer == NULL) {
return false;
}
mallocedLeft = true;
}
if (*ppRightBuffer == NULL) {
*ppRightBuffer =
(u_int16_t*)malloc((srcNumSamples >> 1) * sizeof(u_int16_t));
if (*ppRightBuffer == NULL) {
if (mallocedLeft) {
free(*ppLeftBuffer);
*ppLeftBuffer = NULL;
}
return false;
}
}
for (u_int32_t i = 0; i < (srcNumSamples >> 1); i++) {
(*ppLeftBuffer)[i] = pSrcBuffer[(i << 1)];
(*ppRightBuffer)[i] = pSrcBuffer[(i << 1) + 1];
}
return true;
}
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