audio_encoder.cpp
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:3k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- * 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;
- }