alsa采集faac编码生成AAC文件

#include "recorder.h" #include "player.h" #include <faac.h> typedef unsigned long ULONG; typedef unsigned int UINT; typedef unsigned char BYTE; typedef char _TCHAR; int main(int argc, char *argv[]) { ULONG nSampleRate = 44100; // 采样率 UINT nChannels = 1; // 声道数 UINT nPCMBitSize = 16; // 单样本位数 ULONG nInputSamples = 0; ULONG nMaxOutputBytes = 0; int nRet; faacEncHandle hEncoder; faacEncConfigurationPtr pConfiguration; int nBytesRead; int nPCMBufferSize; BYTE* pbPCMBuffer; BYTE* pbAACBuffer; FILE* fpOut; // AAC file for output fpOut = fopen("out.aac", "wb"); FILE* fpPcm = fopen("out.pcm", "wb"); // (1) Open FAAC engine hEncoder = faacEncOpen(nSampleRate, nChannels, &nInputSamples, &nMaxOutputBytes); if(hEncoder == NULL) { printf("[ERROR] Failed to call faacEncOpen()\n"); return -1; } nPCMBufferSize = nInputSamples * nPCMBitSize / 8; pbPCMBuffer = new BYTE [nPCMBufferSize]; pbAACBuffer = new BYTE [nMaxOutputBytes]; // (2.1) Get current encoding configuration pConfiguration = faacEncGetCurrentConfiguration(hEncoder); pConfiguration->inputFormat = FAAC_INPUT_16BIT; // (2.2) Set encoding configuration nRet = faacEncSetConfiguration(hEncoder, pConfiguration); Recorder recorder; recorder.initRecoder(); char *buffer = (char*)malloc(2048*2*2*2); int audio_samples_per_frame = 32; int audio_sample_rate = nSampleRate; int audio_pts_increment = (90000 * audio_samples_per_frame) / audio_sample_rate; //一秒钟采集多少次 audio_pts_increment /= 2; //单声道除以2 int i =0; for(;i<15*audio_pts_increment;i++) //采集15秒 { fprintf(stderr,"%d\n",audio_pts_increment); int size; for (size = 0; ;) { char *buf = (char*)(buffer+size); int readSize = recorder.recode(buf,32); size += readSize *2; //fprintf(stderr,"readSize=%d size=%d\n",readSize,size); if (size >= 2048) break; } nBytesRead = size; // 输入样本数，用实际读入字节数计算，一般只有读到文件尾时才不是nPCMBufferSize/(nPCMBitSize/8); nInputSamples = nBytesRead / (nPCMBitSize / 8); fprintf(stderr,"nInputSamples %d\n",nInputSamples); // (3) Encode nRet = faacEncEncode( hEncoder, (int*) buffer, nInputSamples, pbAACBuffer, nMaxOutputBytes); //fwrite(pesBuffer, 1, size, fpPes); fwrite(pbAACBuffer, 1, nRet, fpOut); fwrite(buffer, 1, size, fpPcm); fprintf(stderr,"%d: faacEncEncode returns %d\n", i, nRet); //fprintf(stderr,"read size=%d\n",nBytesRead); } // (4) Close FAAC engine nRet = faacEncClose(hEncoder); delete[] pbAACBuffer; fclose(fpOut); free(buffer); return 0; }