myvtm/Module/mod_SurveillanceRecorder/ews_capture.cpp

#include "stdafx.h"
#include "SpBase.h"
#include <locale.h>

#include <portaudio.h>
#include <memutil.h>
#include <md5.h>

#include <ipp.h>

#include <intrin.h>

#include "videoframework.h"
#include "y2k_time.h"

#include "libaudioqueue.h"
#include "libvideoqueue.h"
#include "rec_common.h"

#include "ews_capture.h"

#include "videohorflip.h"

#include "Event.h"


#include "EventCode.h"
#include <cv.h>
#include <cxcore.h>
#include <highgui.h>

#define av_always_inline __inline
#define inline __inline

#ifndef INT64_C
#define INT64_C(c) (c##LL) 
#define UINT64_C(c) (c##UL) 
#endif

#include <stdint.h>
extern "C"
{
#include <libavutil\avutil.h>
#include <libavcodec\avcodec.h>
#include <libswscale\swscale.h>
}
#include "video_common/ffmpeg_api_cpp_adapter.h"

#define CAPTURE_FRAME_TIME	20 // 20ms per frame
#define CAPTURE_CLOCK		8000

DeviceTypeEnum g_eDeviceType;

typedef struct ews_audio_capture_t {
	PaStream *stream;
	Clibaudioqueue *shm_queue;
	ews_capture_t *parent;
}ews_audio_capture_t;

typedef struct ews_video_capture_t {
	videocap_t cap;
	Clibvideoqueue *snapshot_shm_queue;
	Clibvideoqueue *preview_shm_queue;
	Clibvideoqueue *rtp_shm_queue;
	Clibvideoqueue *sales_shm_queue;
	ews_capture_t *parent;
	int camera_type; // CAMERA_TYPE_xxx
	int frame_id;
	struct SwsContext *preview_sws_ctx;
	struct SwsContext *rtp_sws_ctx;
}ews_video_capture_t;

struct ews_capture_t
{
	ews_capture_config_t config;
	ews_audio_capture_t *audio;
	ews_video_capture_t *video;
};

static int Bin2Str(unsigned char *x, int xlen, char *str, int str_size)
{
	static const char *hex2char = "0123456789ABCDEF";
	int i, k = 0;
	if (str_size <= xlen * 2)
		return -1;
	for (i = 0; i < xlen; ++i) {
		int h = x[i] >> 4;
		int l = x[i] & 0xf;
		str[k++] = hex2char[h];
		str[k++] = hex2char[l];
	}
	str[k] = 0;
	return k;
}

static int translate_id(int in_direction, int idx)
{
	int i, n, ii;
	n = Pa_GetDeviceCount();
	for (i = 0, ii = 0; i < n; ++i) {
		const PaDeviceInfo *info = Pa_GetDeviceInfo(i);
		if (in_direction) {
			if (info->maxInputChannels) {
				if (ii == idx) {
					return i;
				}
				ii++;
			}
		} else {
			if (info->maxOutputChannels) {
				if (ii == idx) {
					return i;
				}
				ii++;
			}
		}
	}
	return -1;
}

static int StreamCallback(const void *input, 
	void *output, 
	unsigned long frameCount, 
	const PaStreamCallbackTimeInfo* timeInfo, 
	PaStreamCallbackFlags statusFlags, 
	void *userData)
{
	ews_audio_capture_t *audio_cap = (ews_audio_capture_t*)userData;

	if (input) {
		audio_frame frm;

		frm.bitspersample = 16;
		frm.format = 1;
		frm.data = (char*)const_cast<void*>(input);
		frm.framesize = frameCount << 1;
		frm.nchannels = 1;
		frm.samplespersec = audio_cap->parent->config.iaudiosamplerate;
		frm.iseriesnumber = 0;

		if (audio_cap && audio_cap->shm_queue){
			if (!audio_cap->shm_queue->InsertAudio(&frm)) {
				Dbg("Insert audio for surveillance record failed! frameCount:%d", frameCount);
			}
		}
	}

	if (output) {
		memset(output, 0, frameCount<<1);
	}


	return paContinue;
}

static ews_audio_capture_t *ews_audio_capture_create(ews_capture_t *cap)
{
	ews_audio_capture_t *audio_cap = ZALLOC_T(ews_audio_capture_t);
	if (audio_cap) {
		audio_cap->parent = cap;
		audio_cap->shm_queue = new Clibaudioqueue(REC_COMMON_AUDIO_EWS_SHM_QUEUE);
	}
	return audio_cap;
}

static void ews_audio_capture_destroy(ews_audio_capture_t *audio_cap)
{
	delete audio_cap->shm_queue;
	free(audio_cap);
}

static int ews_audio_capture_start(ews_audio_capture_t *audio_cap)
{
	ews_capture_t *cap = audio_cap->parent;
	PaStreamParameters inParam = {0};
	PaStreamParameters outParam = {0};
	PaError paError;
	const PaDeviceInfo *info;
	int nId = ews_capture_get_audio_device_id(true, cap->config.strAudioIn);
	if (nId == -1) 
	{
		return Error_AudioIN;
	}
	int in_dev_id = translate_id(TRUE, nId);
	if (in_dev_id < 0) {
		Dbg("audio in dev translate failed!");
		return Error_AudioIN;
	}
	info = Pa_GetDeviceInfo(in_dev_id);
	if (!info) {
		Dbg("get device info failed!");
		return Error_AudioIN;
	}
	inParam.channelCount = 1;
	inParam.device = in_dev_id;
	inParam.suggestedLatency = info->defaultLowInputLatency;
	inParam.sampleFormat = paInt16;
	inParam.hostApiSpecificStreamInfo = NULL;
	int iAudioCaptureSampleRate = cap->config.iaudiosamplerate;
	if (Pa_IsFormatSupported(&inParam, NULL, iAudioCaptureSampleRate) != paNoError) {
		Dbg("audio capture create error, cannot open audio input device, and current capture sample rate is %d.", iAudioCaptureSampleRate);
		return Error_AudioIN;
	}
	
	//打开流设备,可以用以下代码替换paError = Pa_OpenStream(&audio_cap->stream, &inParam, &outParam, CAPTURE_CLOCK, 
	//CAPTURE_FRAME_TIME * CAPTURE_CLOCK/1000, paClipOff|paDitherOff, &StreamCallback, audio_cap);
	paError = Pa_OpenStream(&audio_cap->stream, &inParam, NULL, iAudioCaptureSampleRate, 
		CAPTURE_FRAME_TIME * iAudioCaptureSampleRate/1000, paClipOff|paDitherOff, &StreamCallback, audio_cap);

	if (paError != paNoError) {
		Dbg("portaudio open stream failed! paError = %d", paError);
		return Error_AudioIN;
	}

	paError = Pa_StartStream(audio_cap->stream);
	if (paError != paNoError) {
		Dbg("portaudio start stream failed! paError = %d", paError);
		return Error_AudioIN;
	}

	return Error_Succeed;
}

static void ews_audio_capture_stop(ews_audio_capture_t *audio_cap)
{
	if (audio_cap->stream) {
		Pa_AbortStream(audio_cap->stream);
		Pa_CloseStream(audio_cap->stream);
		audio_cap->stream = NULL;
	}
}

static int calc_capture_mode(int width, int height, int *mode)
{
	const struct {
		int mode;
		int width;
		int height;
	} modes [] = {
		{VIDEOCAP_FRAME_SQCIF, VIDEOCAP_SQCIF_WIDTH, VIDEOCAP_SQCIF_HEIGHT},
		{VIDEOCAP_FRAME_QQVGA, VIDEOCAP_QQVGA_WIDTH, VIDEOCAP_QQVGA_HEIGHT},
		{VIDEOCAP_FRAME_QCIF, VIDEOCAP_QCIF_WIDTH, VIDEOCAP_QCIF_HEIGHT},
		{VIDEOCAP_FRAME_QVGA, VIDEOCAP_QVGA_WIDTH, VIDEOCAP_QVGA_HEIGHT},
		{VIDEOCAP_FRAME_CIF, VIDEOCAP_CIF_WIDTH, VIDEOCAP_CIF_HEIGHT},
		{VIDEOCAP_FRAME_VGA, VIDEOCAP_VGA_WIDTH, VIDEOCAP_VGA_HEIGHT},
		{VIDEOCAP_FRAME_4CIF, VIDEOCAP_4CIF_WIDTH, VIDEOCAP_4CIF_HEIGHT},
		{VIDEOCAP_FRAME_SVGA, VIDEOCAP_SVGA_WIDTH, VIDEOCAP_SVGA_HEIGHT},
		{VIDEOCAP_FRAME_NHD, VIDEOCAP_NHD_WIDTH, VIDEOCAP_NHD_HEIGHT},
		{VIDEOCAP_FRAME_SXGA, VIDEOCAP_SXGA_WIDTH, VIDEOCAP_SXGA_HEIGHT},
		{VIDEOCAP_FRAME_720P, VIDEOCAP_720P_WIDTH, VIDEOCAP_720P_HEIGHT},
		{VIDEOCAP_FRAME_1080P, VIDEOCAP_1080P_WIDTH, VIDEOCAP_1080P_HEIGHT},
	};
	int i;
	for (i = 0; i < array_size(modes); ++i) {
		if (modes[i].width == width && modes[i].height == height) {
			*mode = modes[i].mode;
			return 0;
		}
	}
	return Error_NotExist;
}

static int video_shm_enqueue(Clibvideoqueue *shm_queue, video_frame *frame, int flags)
{
	videoq_frame tmp_frm;
	tmp_frm.data = frame->data[0];
	tmp_frm.framesize = frame->width * frame->height * 3;
	tmp_frm.format = VIDEOQ_FORMAT_RGB24;
	tmp_frm.width = frame->width;
	tmp_frm.height = frame->height;
	unsigned int nowtime = y2k_time_now();
	if (!shm_queue->InsertVideo(&tmp_frm, flags,nowtime)) {
		Dbg("caution: insert shm video failed!");
		return Error_Unexpect;
	} else {
		//Dbg("insert shm video ok!");
		return Error_Succeed;
	}
}

static void ews_cap_on_frame(void *user_data, video_frame *frame)
{
	ews_video_capture_t *video_cap = (ews_video_capture_t *)user_data;
	ews_capture_t *cap = video_cap->parent;
	int rc;

	int flip = -1;
	if (cap->config.video_rotate == 0){
		flip = 0;
	}
	else if (cap->config.video_rotate == 180){
		flip = (VIDEOQUEUE_FLAG_VERTICAL_FLIP|VIDEOQUEUE_FLAG_HORIZONTAL_FLIP);
	}
	else {
		return;
	}

	video_cap->frame_id++;

	//Dbg("start ews on frame, id=%d, tick=%d", video_cap->frame_id, GetTickCount());
	//IplImage*img = NULL;
	//img = cvCreateImage(cvSize(frame->width,frame->height),IPL_DEPTH_8U,3);
	//img->imageData = (char*)frame->data[0];
	//cvSaveImage("c:\\ews.jpg", img,0);
	//cvReleaseImageHeader(&img);

	rc = video_shm_enqueue(video_cap->snapshot_shm_queue, frame, flip==0?VIDEOQUEUE_FLAG_VERTICAL_FLIP:VIDEOQUEUE_FLAG_HORIZONTAL_FLIP);
	if (rc != Error_Succeed) 
	{
		Dbg("ews snapshot queue enqueue shm failed! Error = %d, camera_type=%d", rc, video_cap->camera_type);
	}
	//// snapshot
	//if (rc==Error_Succeed)
	//{
	//	if (*cap->config.ref_ews_capture_count) 
	//	{
	//		Dbg("ews camera ref_env_capture_count=%d",*cap->config.ref_ews_capture_count);
	//		InterlockedDecrement(cap->config.ref_ews_capture_count);
	//		LogEvent(Severity_Middle, MOD_EVENT_MEDIACONTROLLER_FINISHED_CAPTURE_ENV, "agent capture env ok, and capture env finished!");
	//	}
	//}
	// preview 320x240
	{
		video_frame preview_frame;
		video_frame_alloc(REC_COMMON_VIDEO_PREVIEW_WIDTH, REC_COMMON_VIDEO_PREVIEW_HEIGHT, VIDEO_FORMAT_RGB24, &preview_frame);
		memset(preview_frame.data[0], 0, preview_frame.height*preview_frame.linesize[0]);
		//uint8_t *src_data[4] = {frame->data[0] + 80*3, 0, 0, 0}; // cut for 480x360
		//sws_scale(video_cap->preview_sws_ctx, src_data, frame->linesize, 0, frame->height, preview_frame.data, preview_frame.linesize);
		uint8_t *dst_data[4] = {preview_frame.data[0] + 30 * preview_frame.linesize[0], 0, 0, 0}; // 320x180 paste to 320x240
		sws_scale(video_cap->preview_sws_ctx, frame->data, frame->linesize, 0, frame->height, dst_data, preview_frame.linesize);
		video_shm_enqueue(video_cap->preview_shm_queue, &preview_frame, flip);
		video_frame_free(&preview_frame);
	}

	// rtp 320x180
	{
		video_frame rtp_frame;
		video_frame_alloc(REC_COMMON_VIDEO_RTP_EWS_WIDTH, REC_COMMON_VIDEO_RTP_EWS_HEIGHT, VIDEO_FORMAT_RGB24, &rtp_frame);
		uint8_t *src_data[4] = {frame->data[0] + (frame->height-1) * frame->linesize[0], 0, 0, 0};
		int src_linesize[4] = {-frame->linesize[0], 0, 0, 0}; // 上下翻转并缩放
		sws_scale(video_cap->rtp_sws_ctx, src_data, src_linesize, 0, frame->height, rtp_frame.data, rtp_frame.linesize);
		video_shm_enqueue(video_cap->rtp_shm_queue, &rtp_frame, flip);
		video_shm_enqueue(video_cap->sales_shm_queue, &rtp_frame, flip);
#if 0
		static int i = 0;
		if (i == 0 && 0) {
			video_frame tmp_frame;
			video_frame_alloc(320, 180, VIDEO_FORMAT_RGB24, &tmp_frame);
			video_frame_fill_black(&tmp_frame);
			videoq_frame frm;
			frm.data = tmp_frame.data[0];
			video_cap->rtp_shm_queue->GetVideo(&frm, 0);
			video_frame_save_bmpfile("d:\\abc.bmp", &tmp_frame);
			video_frame_free(&tmp_frame);
			//video_frame_save_bmpfile("d:\\ab.bmp", &rtp_frame);
		}
#endif
		video_frame_free(&rtp_frame);
	}

	//Dbg("end ews on frame, id=%d, tick=%d", video_cap->frame_id, GetTickCount());;
}

static ews_video_capture_t *ews_video_capture_create(ews_capture_t *cap, int camera_type)
{
	ews_video_capture_t *video_cap = ZALLOC_T(ews_video_capture_t);
	if (video_cap) {
		video_cap->parent = cap;
		video_cap->camera_type = camera_type;
		video_cap->frame_id = 0;
		if (camera_type == CAMERA_TYPE_EWS) { // need to be edited
			video_cap->snapshot_shm_queue = new Clibvideoqueue(REC_COMMON_VIDEO_EWS_SHM_SNAPSHOT_QUEUE);
			video_cap->rtp_shm_queue = new Clibvideoqueue(REC_COMMON_VIDEO_EWS_SHM_RTP_QUEUE);
			video_cap->sales_shm_queue = new Clibvideoqueue(REC_COMMON_VIDEO_SALES_EWS_SHM_RTP_QUEUE);
			video_cap->rtp_sws_ctx = sws_getContext(REC_COMMON_VIDEO_SNAPSHOT_WIDTH, 
				REC_COMMON_VIDEO_SNAPSHOT_HEIGHT,
				PIX_FMT_BGR24,
				REC_COMMON_VIDEO_RTP_EWS_WIDTH,
				REC_COMMON_VIDEO_RTP_EWS_HEIGHT, 
				PIX_FMT_BGR24,
				SWS_POINT, NULL, NULL, NULL);
			video_cap->preview_shm_queue = new Clibvideoqueue(REC_COMMON_VIDEO_EWS_SHM_PREVIEW_QUEUE);
			/*video_cap->preview_sws_ctx = sws_getContext(REC_COMMON_VIDEO_SNAPSHOT_PREVIEW_WIDTH,
			REC_COMMON_VIDEO_SNAPSHOT_PREVIEW_HEIGHT, 
			PIX_FMT_BGR24,
			REC_COMMON_VIDEO_PREVIEW_WIDTH,
			REC_COMMON_VIDEO_PREVIEW_HEIGHT,
			PIX_FMT_BGR24,
			SWS_FAST_BILINEAR, NULL, NULL, NULL);*/
			video_cap->preview_sws_ctx = sws_getContext(REC_COMMON_VIDEO_SNAPSHOT_WIDTH,
				REC_COMMON_VIDEO_SNAPSHOT_HEIGHT, 
				PIX_FMT_BGR24,
				REC_COMMON_VIDEO_RTP_EWS_WIDTH,
				REC_COMMON_VIDEO_RTP_EWS_HEIGHT,
				PIX_FMT_BGR24,
				SWS_FAST_BILINEAR, NULL, NULL, NULL);
		}
	}
	return video_cap;
}

static void ews_video_capture_destroy(ews_video_capture_t *video_cap)
{
	if (video_cap) {
		if (video_cap->preview_sws_ctx) {
			sws_freeContext(video_cap->preview_sws_ctx);
			video_cap->preview_sws_ctx = NULL;
		}
		if (video_cap->rtp_sws_ctx) {
			sws_freeContext(video_cap->rtp_sws_ctx);
			video_cap->rtp_sws_ctx = NULL;
		}
		if (video_cap->snapshot_shm_queue) {
			delete video_cap->snapshot_shm_queue;
			video_cap->snapshot_shm_queue = NULL;
		}
		if (video_cap->rtp_shm_queue) {
			delete video_cap->rtp_shm_queue;
			video_cap->rtp_shm_queue = NULL;
		}
		if (video_cap->sales_shm_queue) {
			delete video_cap->sales_shm_queue;
			video_cap->sales_shm_queue = NULL;
		}
		if (video_cap->preview_shm_queue) {
			delete video_cap->preview_shm_queue;
			video_cap->preview_shm_queue = NULL;
		}
		free(video_cap);
	}
}

static int ews_video_capture_start(ews_video_capture_t *video_cap)
{
	ews_capture_config_t *conf = &video_cap->parent->config;
	int dev_id;
	if (video_cap->camera_type == CAMERA_TYPE_EWS)
	{
		CSimpleStringA tmp;
		dev_id = ews_capture_get_video_device_id(conf->strVideo,tmp);
		if (dev_id == -1) 
		{
			Dbg("No ews camera,please check config file or device!");
			return -1;
		}
	}

	videocap_param param = {0};
	int cap_mode;
	int rc = -1;
	rc = calc_capture_mode(REC_COMMON_VIDEO_SNAPSHOT_WIDTH, REC_COMMON_VIDEO_SNAPSHOT_HEIGHT, &cap_mode);
	if (rc != 0) 
	{
		Dbg("calc cap_mode failed!");
		return rc;
	}

	param.cap_mode = cap_mode;
	param.dev_id = dev_id;
	param.frame_fmt = VIDEO_FORMAT_RGB24;
	if ((ePadtype == g_eDeviceType)||(eDesk2SType == g_eDeviceType))
	{
		param.fps = REC_COMMON_VIDEO_FPS_MOBILE;
	} 
	else
	{
		param.fps = REC_COMMON_VIDEO_RAW_FPS;
	}
	param.on_frame = &ews_cap_on_frame;
	param.user_data = video_cap;
	param.option = 0;

	rc = videocap_create(&video_cap->cap, &param);
	if (rc != 0) 
	{
		Dbg("videocap create failed!");
		return rc;
	}

	rc = videocap_start(video_cap->cap);
	if (rc != 0) 
	{
		Dbg("videocap start failed!");
		videocap_destroy(video_cap->cap);
		video_cap->cap = NULL;
		return rc;
	}

	return 0;
}

static void ews_video_capture_stop(ews_video_capture_t *video_cap)
{
	if (video_cap->cap) {
		videocap_stop(video_cap->cap);
		videocap_destroy(video_cap->cap);
		video_cap->cap = NULL;
	}
}

int ews_capture_create( const ews_capture_config_t *config, ews_capture_t **p_cap )
{
	ews_capture_t *cap = ZALLOC_T(ews_capture_t);
	cap->audio = NULL;
	cap->video = NULL;
	memcpy(&cap->config, config, sizeof(ews_capture_config_t));
	cap->audio = ews_audio_capture_create(cap);
	if (!cap->audio) {
		Dbg("create audio capture object failed!");
		return Error_Unexpect;
	}
	CSimpleStringA tmp;
	int dev_id = ews_capture_get_video_device_id(config->strVideo,tmp);
	if (dev_id != -1) 
	{
		cap->video = ews_video_capture_create(cap, CAMERA_TYPE_EWS);
		if (!cap->video) {
			Dbg("create ews video object failed!");
			return Error_Unexpect;
		}
	}

	if(dev_id == -1)
	{
		Dbg("ews camera device id error!");
		ews_capture_destroy(cap);
		return Error_Unexpect;
	}
	else
	{
		*p_cap = cap;
		Dbg("create surveillance record audio capture object(%0x) success, capture sample rate is %d, and audio in device name is %s.",
			cap, cap->config.iaudiosamplerate, cap->config.strAudioIn.GetData());
		return 0;
	}
}

// 重启摄像头用到
ErrorCodeEnum ews_capture_create( const ews_capture_config_t *config,ews_capture_t *cap )
{
	CSimpleStringA tmp;
	int dev_id = ews_capture_get_video_device_id(config->strVideo,tmp);
	if((dev_id != -1)&&(cap->video == NULL))
	{
		cap->video = ews_video_capture_create(cap, CAMERA_TYPE_EWS);
		if (!cap->video)
		{
			Dbg("create ews video object failed!");
			return Error_Unexpect;
		}
	}
	else
	{
		return Error_Unexpect;
	}
	return Error_Succeed;
}

void ews_capture_destroy( ews_capture_t *cap )
{
	if (cap) {
		if (cap->video) {
			ews_video_capture_destroy(cap->video);
			cap->video = NULL;
		}
		if (cap->audio) {
			ews_audio_capture_destroy(cap->audio);
			cap->audio = NULL;
		}
		free(cap);
	}
}

ErrorCodeEnum ews_capture_start( ews_capture_t *cap )
{
	int rc = 0;

	if (cap->audio) 
	{
		rc = ews_audio_capture_start(cap->audio);
		if (rc != Error_Succeed) 
		{
			ErrorCodeEnum rslt = (ErrorCodeEnum)rc;
			if (rslt == Error_AudioIN)
			{
				Dbg("start audio In object failed! rc:%d", rc);
			}
			return rslt;
		}
	}
	else
	{
		Dbg("start ews audio Error_Unexpect");
		return Error_Unexpect;
	}

	if (cap->video)
	{
		rc = ews_video_capture_start(cap->video);
		if (rc != Error_Succeed)
		{
			Dbg("start ews video capture object failed! rc:%d", rc);
			CSimpleStringA strCamFriendlyName;
			ews_capture_get_video_device_id(cap->config.strVideo.GetData(),strCamFriendlyName);
			char strMessage[MAX_PATH*2] = {0};
			get_external_camera_exception_message(strMessage, MAX_PATH*2, strCamFriendlyName, "open ews camera fail,please check device");
			LogError(Severity_Middle,Error_NotInit,ERROR_MOD_SURVEILLANCERECORDER_EWSCAM_OPEN,strMessage);
			return Error_EwsCamera;
		}
	}
	else
	{
		Dbg("start ews video Error_Unexpect");
		return Error_Unexpect;
	}

	return (ErrorCodeEnum)rc;
}

void ews_capture_stop( ews_capture_t *cap )
{
	if (cap->audio) {
		ews_audio_capture_stop(cap->audio);
	}
	if (cap->video) {
		ews_video_capture_stop(cap->video);
	}
}

int ews_capture_detect_camera_bug( ews_capture_t *cap, int *ews_n )
{
	*ews_n = 0;
	if (cap->video)
	{
		if (cap->video->rtp_shm_queue) 
		{
			*ews_n  = cap->video->rtp_shm_queue->GetVideoLens();
		}
	} 
	else 
	{
		*ews_n = -1;
	}

	return 0;
}

int ews_capture_get_last_frametime( ews_capture_t *cap, DWORD *ews_n )
{
	*ews_n = 0;
	if (cap->video) 
	{
		if (cap->video->rtp_shm_queue) 
		{
			*ews_n  = cap->video->rtp_shm_queue->GetLastFrameTime();
		}
	} 
	else 
	{
		*ews_n = 0;
	}
	
	return 0;
}

static int ews_audio_get_dev_count(int *in_cnt, int *out_cnt)
{
	int icnt = 0, ocnt = 0;
	int cnt = Pa_GetDeviceCount();
	for (int i = 0; i < cnt; ++i) {
		const PaDeviceInfo *info = Pa_GetDeviceInfo(i);
		if (info->maxInputChannels)
			icnt ++;
		if (info->maxOutputChannels)
			ocnt ++;
	}
	if (in_cnt)
		*in_cnt = icnt;
	if (out_cnt)
		*out_cnt = ocnt;
	return 0;
}

static CSimpleStringA ews_audio_get_dev_name(bool in_direction, int idx)
{
	int cnt = Pa_GetDeviceCount();
	int ii, i;
	for (i = 0, ii = 0; i < cnt; ++i) {
		const PaDeviceInfo *info = Pa_GetDeviceInfo(i);
		if (in_direction) {
			if (info->maxInputChannels) {
				if (idx == ii) {
					return CSimpleStringA(info->name);
				}
				ii++;
			}
		} else {
			if (info->maxOutputChannels) {
				if (idx == ii) {
					return CSimpleStringA(info->name);
				}
				ii++;
			}
		}
	}
	return CSimpleStringA();
}

int ews_capture_lib_init()
{
	HRESULT hr = CoInitialize(NULL);
	int rc;

	{
		HMODULE hModule = GetModuleHandleA("MSVCR100.dll");
		if (hModule) {
			typedef char *(*f_setlocale)(int, const char*);
			f_setlocale f = (f_setlocale)GetProcAddress(hModule, "setlocale");
			(*f)(LC_ALL, "chs");
		}
	}

	if (SUCCEEDED(hr)) {
		PaError Error;
		Error = Pa_Initialize();
		if (Error == paNoError) {
			rc = videoframework_init();
			if (rc != 0) {
				Dbg("videoframework_init failed, rc=%d", rc);
				return Error_Resource;
			}
		} else {
			Dbg("PaInitialize failed, rc=%d", Error);
			return Error_Resource;
		}
	} else {
		Dbg("coinitialze failed! hr:%d", hr);
		return Error_Resource;
	}

	{
		int i, n;
		n = videocap_get_device_count();
		for (i = 0; i < n; ++i) {
			WCHAR tmp[256];
			char t[256];
			WCHAR tmp1[256];
			char t1[256];
			videocap_get_device_name(i, tmp, ARRAYSIZE(tmp));
			WideCharToMultiByte(CP_ACP, 0, tmp, -1, t, sizeof(t), 0, NULL);
			videocap_get_device_path(i, tmp1, ARRAYSIZE(tmp1));
			WideCharToMultiByte(CP_ACP, 0, tmp1, -1, t1, sizeof(t1), 0, NULL);
			{
				unsigned char x[MD5_DIGESTSIZE];
				md5_ctx_t ctx;
				md5_init(&ctx);
				md5(x, t1, strlen(t1));
				Bin2Str(x, sizeof(x), t1, sizeof(t1));
			}
			Dbg("%d = %s;%s", i, t, t1);
		}
	}

	{
		int icnt, ocnt;
		rc = ews_audio_get_dev_count(&icnt, &ocnt);
		if (rc == 0) {
			int i;
			Dbg("audio input devices(%d):", icnt);
			for (i = 0; i < icnt; ++i) {
				CSimpleStringA str = ews_audio_get_dev_name(true, i);
				Dbg("%d = %s", i, (LPCSTR)str);
			}
			Dbg("audio output devices(%d):", ocnt);
			for (i = 0; i < ocnt; ++i) {
				CSimpleStringA str = ews_audio_get_dev_name(false, i);
				Dbg("%d = %s", i, (LPCSTR)str);
			}
		}
	}

	return Error_Succeed;
}

void ews_capture_lib_term()
{
	videoframework_term();
	Pa_Terminate();
	CoUninitialize();
}

int ews_capture_get_audio_device_id( bool in_direction, const char *dev_name )
{
	int cnt = Pa_GetDeviceCount();
	int ii, i;
	for (i = 0, ii = 0; i < cnt; ++i) {
		const PaDeviceInfo *info = Pa_GetDeviceInfo(i);
		if (in_direction) {
			if (info->maxInputChannels) {
				if (strstr(info->name, dev_name) != NULL) {
					return ii;
				}
				ii++;
			}
		} else {
			if (info->maxOutputChannels) {
				if (strstr(info->name, dev_name) != NULL) {
					return ii;
				}
				ii++;
			}
		}
	}
	return -1;
}

//int ews_capture_get_video_device_id( const char *dev_name )
//{
//	int i, n;
//
//	n = videocap_get_device_count();
//	for (i = 0; i < n; ++i) {
//		WCHAR tmp[256];
//		char t[256];
//		WCHAR tmp1[256];
//		char t1[256];
//		videocap_get_device_name(i, tmp, ARRAYSIZE(tmp));
//		WideCharToMultiByte(CP_ACP, 0, tmp, -1, t, sizeof(t), 0, NULL);
//		videocap_get_device_path(i, tmp1, ARRAYSIZE(tmp1));
//		WideCharToMultiByte(CP_ACP, 0, tmp1, -1, t1, sizeof(t1), 0, NULL);
//		{
//			unsigned char x[MD5_DIGESTSIZE];
//			md5_ctx_t ctx;
//			md5_init(&ctx);
//			md5(x, t1, strlen(t1));
//			Bin2Str(x, sizeof(x), t1, sizeof(t1));
//		}
//		strcat(t, ";");
//		strcat(t, t1);
//		if (strcmp(dev_name, t) == 0)
//			return i;
//	}
//	return -1; // not found
//}


int ews_capture_get_video_device_id(const char *dev_inst_path, CSimpleStringA &ews_name)
{
	int i, n;
	
	n = videocap_get_device_count();
	for (i = 0; i < n; ++i) {
		WCHAR tmp1[256];
		char t1[256];
		videocap_get_device_path(i, tmp1, ARRAYSIZE(tmp1));
		WideCharToMultiByte(CP_ACP, 0, tmp1, -1, t1, sizeof(t1), 0, NULL);
		// save DevicePath
		for (int j = 0; j < strlen(t1); ++j)
		{
			t1[j] = toupper(t1[j]);
			if (t1[j] == '#') t1[j] = '\\';
		}
		if (strstr(t1,dev_inst_path) != NULL)
		{
			WCHAR tmp[256]={0};
			char t[256]={0};
			videocap_get_device_name(i, tmp, ARRAYSIZE(tmp));
			WideCharToMultiByte(CP_ACP, 0, tmp, -1, t, sizeof(t), 0, NULL);
			ews_name = t;
			Dbg("matched ews camera device: [%d] %s.", i, t1);
			return i;
		}
		else{
			WCHAR tmp[256] = {0};
			char t[256] = {0};
			videocap_get_device_name(i, tmp, ARRAYSIZE(tmp));
			WideCharToMultiByte(CP_ACP, 0, tmp, -1, t, sizeof(t), 0, NULL);
			Dbg("device list: [%d] %s.", i, t1);
		}
	}
	return -1; // not found
}


bool ews_capture_check_video_device_match( const char *dev_name, const char*dev_inst_path )
{
	int i, n;

	n = videocap_get_device_count();
	for (i = 0; i < n; ++i) {
		WCHAR tmp[256];
		char t[256];
		WCHAR tmp1[256];
		char t1[256];
		videocap_get_device_name(i, tmp, ARRAYSIZE(tmp));
		WideCharToMultiByte(CP_ACP, 0, tmp, -1, t, sizeof(t), 0, NULL);
		videocap_get_device_path(i, tmp1, ARRAYSIZE(tmp1));
		WideCharToMultiByte(CP_ACP, 0, tmp1, -1, t1, sizeof(t1), 0, NULL);
		// save DevicePath (add by ly at 20160725)
		char t2[256];
		strcpy(t2,t1);
		for (int j = 0; j < strlen(t2); ++j)
		{
			t2[j] = toupper(t2[j]);
			if (t2[j] == '#') t2[j] = '\\';
		}
		{
			unsigned char x[MD5_DIGESTSIZE];
			md5_ctx_t ctx;
			md5_init(&ctx);
			md5(x, t1, strlen(t1));
			Bin2Str(x, sizeof(x), t1, sizeof(t1));
		}
		strcat(t, ";");
		strcat(t, t1);
		if (strstr(t2,dev_inst_path) != NULL)
		{
			Dbg("[dbg] %s founded in %d cameras.", dev_inst_path, n);
			if (strcmp(dev_name, t) == 0)
				return true;
		}
	}
	return false; // not match
}

bool ews_capture_adj_brightness( ews_capture_t *cap,int nvalue,ErrorCodeEnum nCode )
{
	HRESULT rst = S_OK;
	if (cap->video&&(nCode!=Error_EwsCamera)&&(nCode!=Error_AllCamera))
	{
		rst = videocap_adj_brightness(cap->video->cap,nvalue);
	}
	if (SUCCEEDED(rst))
		return true;
	return false;
}

bool ews_capture_set_autobrightness( ews_capture_t *cap,ErrorCodeEnum nCode )
{
	HRESULT rst = S_OK;
	if (cap->video&&(nCode!=Error_EwsCamera)&&(nCode!=Error_AllCamera))
	{
		rst = videocap_set_autobrightness(cap->video->cap);
	}
	if (SUCCEEDED(rst))
		return true;
	return false;
}

int ews_capture_get_brightness( ews_capture_t *cap,ErrorCodeEnum nCode )
{
	int nValue=0;
	HRESULT rst = S_OK;
	if (cap->video&&(nCode!=Error_EwsCamera)&&(nCode!=Error_AllCamera))
	{
		HRESULT rst = videocap_get_brightness(cap->video->cap,&nValue);
	}
	else
	{
		return -1;
	}

	if (SUCCEEDED(rst))
	{
		return nValue;
	} 
	else
	{
		return -1;
	}
}

int ews_stop_camera( ews_capture_t *cap )
{
	if (cap->video)
	{
		ews_video_capture_stop(cap->video);
		ews_video_capture_destroy(cap->video);
		cap->video = NULL;
		return 0;
	} 
	else
	{
		return -1;
	}
}

int get_external_camera_exception_message(char* pBuffer, size_t uLen, CSimpleStringA strDeviceName, const char* strErrorMessage)
{
	int iRet = 0;
	if (strDeviceName.GetLength() > 0){
		const char* strCameraName = strDeviceName.GetData();
		char strBuffer[MAX_PATH] = {0};
		if (sprintf_s(strBuffer, MAX_PATH, "%s", strCameraName) > 0){
			char *pIndex = NULL;
			if (pIndex = (char*)strstr(strBuffer, ";")){
				*pIndex = '\0';
			}
		}
		
		if (NULL != strErrorMessage){
			size_t uDataLen = strlen(strBuffer);
			size_t uErrorLen = strlen(strErrorMessage);
			if (uLen > uDataLen + uErrorLen + 10){
				iRet = sprintf_s(pBuffer, uLen, "[%s] %s", strBuffer, strErrorMessage);
			}
		}
	}

	if (0 == iRet){
		if (NULL != strErrorMessage){
			iRet = sprintf_s(pBuffer, uLen, "%s", strErrorMessage);
		}
	}

	return iRet;
}