pcm_Stream_deal.c
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#include <stdio.h>
#include "AudioDeal/FF_Statement.h"
#include "../Alsa/pcm_AlsaPlay.h"
#include "AudioDeal/AudioDeal.h"
#include "../Filter/FF_Filter.h"
#include "../Resample/pcm_Resample.h"
#include "JZsdkLib.h"
#include "./AudioStreamDeal.h"
#define MEM_BLOCK_LEN (4096) //设置内存块处理长度为4096
/***************************
*
* pcm数据池子，pcm数据的接入接口
*
* ************/
int PCM_PooL_Interface_PcmData(struct AudioDealInfo *AD_Info,unsigned int in_sampleRate, AVChannelLayout in_ch_layout, enum AVSampleFormat in_format , unsigned char* data, int dataSize)
{
T_JZsdkReturnCode ret;
//这段代码遍历 data，将连续的 0x00 0x00 替换为 0x00 0x01。这可能是为了确保音频数据中没有静默的连续帧，或者是为了满足某种特定的播放要求。
for(int i=0; i<dataSize; i+=2)
{
if(i+1 < dataSize && data[i]==0x00 && data[i+1]==0x00)
{
data[i+1] = 0x01; // MSB,LSB
}
}
//分配了两个 AVFrame 对象，一个用于临时存储重采样后的数据（temp_frame），另一个用于从过滤器中获取数据（eq_frame）。
AVFrame *temp_frame = av_frame_alloc();
AVFrame *eq_frame = av_frame_alloc();
//如果此次输入的音频数据不同于采样的当前设置，重设采样
FF_Resample_Reset(AD_Info, in_sampleRate, in_ch_layout, in_format);
//检查滤波器
FF_Filter_Init(AD_Info, 0x00);
int out_nb_samples = 0; //重采样输出的数据长度
int UnDeal_DataSize = dataSize; //未处理的数据长度
while( (UnDeal_DataSize > 0) && (AD_Info->AudioDeal_ResampleAndFilter_Execute_Flag == JZ_FLAGCODE_ON))
{
int dealLen = 0;
if (UnDeal_DataSize > MEM_BLOCK_LEN)
{
dealLen = MEM_BLOCK_LEN;
UnDeal_DataSize = UnDeal_DataSize - dealLen;
}
else
{
dealLen = UnDeal_DataSize;
UnDeal_DataSize = UnDeal_DataSize - dealLen;
}
//重采样 //仅处理一半样本量
void *resampledData = FF_Resample_Send_And_Get_ResampleData(AD_Info, &data, dealLen/2, &out_nb_samples);
//如果滤波打开
//滤波处理
if(AD_Info->FilterMode != JZ_FLAGCODE_OFF)
{
temp_frame->data[0] = (unsigned char*)resampledData;
temp_frame->nb_samples = out_nb_samples;
//将临时帧 放入 均衡滤波器
FF_Filter_push_frame_to_fliter(AD_Info, temp_frame);
while(AD_Info->AudioDeal_ResampleAndFilter_Execute_Flag == JZ_FLAGCODE_ON)
{
//得到滤波器输出的音频帧 eq_frame
int fret = FF_Filter_get_frame_from_filter(AD_Info, eq_frame);
if (fret != JZ_ERROR_SYSTEM_MODULE_CODE_SUCCESS)
{
break;
}
//播放改滤波后的帧
Pcm_AlsaPlay(AD_Info, (unsigned char*)eq_frame->data[0], eq_frame->nb_samples);
av_frame_unref(eq_frame);
}
av_frame_unref(temp_frame);
}
else //不滤波
{
//直接播放
//JZSDK_LOG_INFO("播放 %d 数据",out_nb_samples);
Pcm_AlsaPlay(AD_Info ,resampledData, out_nb_samples);
}
//先改用保存
//AudioDeal_Test_DataSave((unsigned char *)resampledData, out_nb_samples, ResampleInfo->Out_SampleRate, 1, 16);
FF_Resample_freeReasmpleData(resampledData);
data += dealLen;
}
av_frame_free(&temp_frame);
av_frame_free(&eq_frame);
}