君正T31应用开发3-音频输入

	int devID = 1;                                           //devID:0:数字MIC，1：代表模拟MIC
	IMPAudioIOAttr attr;
	attr.samplerate = AUDIO_SAMPLE_RATE_16000;               //音频采样率为16000
	attr.bitwidth = AUDIO_BIT_WIDTH_16;                      //音频采样精度16位
	attr.soundmode = AUDIO_SOUND_MODE_MONO;                  //采取单声道模式
	attr.frmNum = 40;                                        //缓存帧的数目 
	attr.numPerFrm = 640;                                    //每帧的采样点个数
	attr.chnCnt = 1;                                         //支持的通道个数
	ret = IMP_AI_SetPubAttr(devID, &attr);

		/* Step 6: get audio record frame. */
		/*在使用IMP_AI_GetFrame之前使用该接口，当该接口调用成功之后表示音频
 		  数据已经准备完毕，可以使用IMP_AI_GetFrame获取音频数据*/
		ret = IMP_AI_PollingFrame(devID, chnID, 1000);
		if (ret != 0 ) {
			IMP_LOG_ERR(TAG, "Audio Polling Frame Data error\n");
		}
		/* 
		* @param[in] audioDevId 音频设备号.
 		* @param[in] aiChn 音频输入通道号.
 		* @param[out] frm 音频帧结构体指针.
 		* @param[in] block 阻塞/非阻塞标识.
 		*/
		IMPAudioFrame frm;
		ret = IMP_AI_GetFrame(devID, chnID, &frm, BLOCK);
		if(ret != 0) {
			IMP_LOG_ERR(TAG, "Audio Get Frame Data error\n");
			return NULL;
		}
		/* Step 8: release the audio record frame. */
		ret = IMP_AI_ReleaseFrame(devID, chnID, &frm);
		if(ret != 0) {
			IMP_LOG_ERR(TAG, "Audio release frame data error\n");
			return NULL;
		}

/*
 * Ingenic IMP AI implement.
 *
 * Copyright (C) 2017 Ingenic Semiconductor Co.,Ltd
 *
 */

#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/prctl.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <stdint.h>
#include <errno.h>
#include <pthread.h>
#include <semaphore.h>
#include <fcntl.h>
#include <sys/time.h>

#include <imp/imp_audio.h>
#include <imp/imp_log.h>
#define TAG "Sample-AI"


#define AI_BASIC_TEST_RECORD_FILE "ai_lbb.pcm"
#define AI_BASIC_TEST_RECORD_NUM 600

static void *_ai_basic_record_test_thread(void *argv)
{
	int ret = -1;
	int record_num = 0;

	FILE *record_file = fopen(AI_BASIC_TEST_RECORD_FILE, "wb");
	if(record_file == NULL) {
		IMP_LOG_ERR(TAG, "fopen %s failed\n", AI_BASIC_TEST_RECORD_FILE);
		return NULL;
	}

	/* Step 1: set public attribute of AI device. */
	int devID = 1;
	IMPAudioIOAttr attr;
	attr.samplerate = AUDIO_SAMPLE_RATE_16000;
	attr.bitwidth = AUDIO_BIT_WIDTH_16;
	attr.soundmode = AUDIO_SOUND_MODE_MONO;
	attr.frmNum = 40;
	attr.numPerFrm = 640;
	attr.chnCnt = 1;
	ret = IMP_AI_SetPubAttr(devID, &attr);
	if(ret != 0) {
		IMP_LOG_ERR(TAG, "set ai %d attr err: %d\n", devID, ret);
		return NULL;
	}

	memset(&attr, 0x0, sizeof(attr));
	ret = IMP_AI_GetPubAttr(devID, &attr);
	if(ret != 0) {
		IMP_LOG_ERR(TAG, "get ai %d attr err: %d\n", devID, ret);
		return NULL;
	}

	IMP_LOG_INFO(TAG, "Audio In GetPubAttr samplerate : %d\n", attr.samplerate);
	IMP_LOG_INFO(TAG, "Audio In GetPubAttr   bitwidth : %d\n", attr.bitwidth);
	IMP_LOG_INFO(TAG, "Audio In GetPubAttr  soundmode : %d\n", attr.soundmode);
	IMP_LOG_INFO(TAG, "Audio In GetPubAttr     frmNum : %d\n", attr.frmNum);
	IMP_LOG_INFO(TAG, "Audio In GetPubAttr  numPerFrm : %d\n", attr.numPerFrm);
	IMP_LOG_INFO(TAG, "Audio In GetPubAttr     chnCnt : %d\n", attr.chnCnt);

	/* Step 2: enable AI device. */
	ret = IMP_AI_Enable(devID);
	if(ret != 0) {
		IMP_LOG_ERR(TAG, "enable ai %d err\n", devID);
		return NULL;
	}

	/* Step 3: set audio channel attribute of AI device. */
	int chnID = 0;
	IMPAudioIChnParam chnParam;
	chnParam.usrFrmDepth = 40;
	ret = IMP_AI_SetChnParam(devID, chnID, &chnParam);
	if(ret != 0) {
		IMP_LOG_ERR(TAG, "set ai %d channel %d attr err: %d\n", devID, chnID, ret);
		return NULL;
	}

	memset(&chnParam, 0x0, sizeof(chnParam));
	ret = IMP_AI_GetChnParam(devID, chnID, &chnParam);
	if(ret != 0) {
		IMP_LOG_ERR(TAG, "get ai %d channel %d attr err: %d\n", devID, chnID, ret);
		return NULL;
	}

	IMP_LOG_INFO(TAG, "Audio In GetChnParam usrFrmDepth : %d\n", chnParam.usrFrmDepth);

	/* Step 4: enable AI channel. */
	ret = IMP_AI_EnableChn(devID, chnID);
	if(ret != 0) {
		IMP_LOG_ERR(TAG, "Audio Record enable channel failed\n");
		return NULL;
	}

	/* Step 5: Set audio channel volume. */
	int chnVol = 60;
	ret = IMP_AI_SetVol(devID, chnID, chnVol);
	if(ret != 0) {
		IMP_LOG_ERR(TAG, "Audio Record set volume failed\n");
		return NULL;
	}

	ret = IMP_AI_GetVol(devID, chnID, &chnVol);
	if(ret != 0) {
		IMP_LOG_ERR(TAG, "Audio Record get volume failed\n");
		return NULL;
	}
	IMP_LOG_INFO(TAG, "Audio In GetVol    vol : %d\n", chnVol);

	int aigain = 28;
	ret = IMP_AI_SetGain(devID, chnID, aigain);
	if(ret != 0) {
		IMP_LOG_ERR(TAG, "Audio Record Set Gain failed\n");
		return NULL;
	}

	ret = IMP_AI_GetGain(devID, chnID, &aigain);
	if(ret != 0) {
		IMP_LOG_ERR(TAG, "Audio Record Get Gain failed\n");
		return NULL;
	}
	IMP_LOG_INFO(TAG, "Audio In GetGain    gain : %d\n", aigain);

	while(1) {
		/* Step 6: get audio record frame. */

		ret = IMP_AI_PollingFrame(devID, chnID, 1000);
		if (ret != 0 ) {
			IMP_LOG_ERR(TAG, "Audio Polling Frame Data error\n");
		}
		IMPAudioFrame frm;
		ret = IMP_AI_GetFrame(devID, chnID, &frm, BLOCK);
		if(ret != 0) {
			IMP_LOG_ERR(TAG, "Audio Get Frame Data error\n");
			return NULL;
		}
		
		printf("seq = %d,timeStamp = %lld\n",frm.seq,frm.timeStamp);
		
		/* Step 7: Save the recording data to a file. */
		fwrite(frm.virAddr, 1, frm.len, record_file);

		/* Step 8: release the audio record frame. */
		ret = IMP_AI_ReleaseFrame(devID, chnID, &frm);
		if(ret != 0) {
			IMP_LOG_ERR(TAG, "Audio release frame data error\n");
			return NULL;
		}

		if(++record_num >= AI_BASIC_TEST_RECORD_NUM)
			break;
	}
	sleep(3);
	/* Step 9: disable the audio channel. */
	ret = IMP_AI_DisableChn(devID, chnID);
	if(ret != 0) {
		IMP_LOG_ERR(TAG, "Audio channel disable error\n");
		return NULL;
	}

	/* Step 10: disable the audio devices. */
	ret = IMP_AI_Disable(devID);
	if(ret != 0) {
		IMP_LOG_ERR(TAG, "Audio device disable error\n");
		return NULL;
	}

	fclose(record_file);
	pthread_exit(0);
}

int main(void)
{
	int ret = -1;
	pthread_t record_thread_id;
	printf("[INFO] Test 1: Start audio record test.\n");
	printf("[INFO]        : Can create the %s file.\n", AI_BASIC_TEST_RECORD_FILE);
	printf("[INFO]        : Please input any key to continue.\n");
	getchar();

	/* Step 1: Start audio recording thread. */
	ret = pthread_create(&record_thread_id, NULL, _ai_basic_record_test_thread, NULL);
	if(ret != 0) {
		IMP_LOG_ERR(TAG, "[ERROR] %s: pthread_create Audio Record failed\n", __func__);
		return -1;
	}
	pthread_join(record_thread_id, NULL);
	return 0;
}