/* * next generation[tm] xawtv capture interfaces * * (c) 2001 Gerd Knorr <kraxel@bytesex.org> * */#define NG_PRIVATE#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <string.h>#include <pthread.h>#include <dirent.h>#include <fnmatch.h>#include <errno.h>#include <ctype.h>#include <inttypes.h>#include <sys/time.h>#include <sys/types.h>#include <dlfcn.h>#ifndef RTLD_NOW# define RTLD_NOW RTLD_LAZY#endif#include "grab-ng.h"int  ng_debug          = 3;//int  ng_debug          = 0;		add by quentinint  ng_chromakey      = 0x00ff00ff;int  ng_jpeg_quality   = 75;int  ng_ratio_x        = 4;int  ng_ratio_y        = 3;char ng_v4l_conf[256]  = "v4l-conf";/* --------------------------------------------------------------------- */const unsigned int ng_vfmt_to_depth[] = {    0,               /* unused   */    8,               /* RGB8     */    8,               /* GRAY8    */    16,              /* RGB15 LE */    16,              /* RGB16 LE */    16,              /* RGB15 BE */    16,              /* RGB16 BE */    24,              /* BGR24    */    32,              /* BGR32    */    24,              /* RGB24    */    32,              /* RGB32    */    16,              /* LUT2     */    32,              /* LUT4     */    16,		     /* YUYV     */    16,		     /* YUV422P  */    12,		     /* YUV420P  */    0,		     /* MJPEG    */    0,		     /* JPEG     */    16,		     /* UYVY     */};const char* ng_vfmt_to_desc[] = {    "none",    "8 bit PseudoColor (dithering)",    "8 bit StaticGray",    "15 bit TrueColor (LE)",    "16 bit TrueColor (LE)",    "15 bit TrueColor (BE)",    "16 bit TrueColor (BE)",    "24 bit TrueColor (LE: bgr)",    "32 bit TrueColor (LE: bgr-)",    "24 bit TrueColor (BE: rgb)",    "32 bit TrueColor (BE: -rgb)",    "16 bit TrueColor (lut)",    "32 bit TrueColor (lut)",    "16 bit YUV 4:2:2 (packed, YUYV)",    "16 bit YUV 4:2:2 (planar)",    "12 bit YUV 4:2:0 (planar)",    "MJPEG (AVI)",    "JPEG (JFIF)",    "16 bit YUV 4:2:2 (packed, UYVY)",};/* --------------------------------------------------------------------- */const unsigned int   ng_afmt_to_channels[] = {    0,  1,  2,  1,  2,  1,  2, 0};const unsigned int   ng_afmt_to_bits[] = {    0,  8,  8, 16, 16, 16, 16, 0};const char* ng_afmt_to_desc[] = {    "none",    "8bit mono",    "8bit stereo",    "16bit mono (LE)",    "16bit stereo (LE)",    "16bit mono (BE)",    "16bit stereo (BE)",    "mp3 compressed audio",};/* --------------------------------------------------------------------- */const char* ng_attr_to_desc[] = {    "none",    "norm",    "input",    "volume",    "mute",    "audio mode",    "color",    "bright",    "hue",    "contrast",};/* --------------------------------------------------------------------- */void ng_init_video_buf(struct ng_video_buf *buf){    memset(buf,0,sizeof(*buf));    pthread_mutex_init(&buf->lock,NULL);        pthread_cond_init(&buf->cond,NULL);}void ng_release_video_buf(struct ng_video_buf *buf){    int release;    pthread_mutex_lock(&buf->lock);    buf->refcount--;    release = (buf->refcount == 0);    pthread_mutex_unlock(&buf->lock);    if (release && NULL != buf->release)	buf->release(buf);}void ng_wakeup_video_buf(struct ng_video_buf *buf){    pthread_cond_signal(&buf->cond);}void ng_waiton_video_buf(struct ng_video_buf *buf){    pthread_mutex_lock(&buf->lock);    while (buf->refcount)	pthread_cond_wait(&buf->cond, &buf->lock);    pthread_mutex_unlock(&buf->lock);}static void ng_free_video_buf(struct ng_video_buf *buf){    free(buf->data);    free(buf);}struct ng_video_buf*ng_malloc_video_buf(struct ng_video_fmt *fmt, int size){    struct ng_video_buf *buf;    buf = malloc(sizeof(*buf));    if (NULL == buf)	return NULL;    ng_init_video_buf(buf);    buf->fmt  = *fmt;    buf->size = size;    buf->data = malloc(size);    if (NULL == buf->data) {	free(buf);	return NULL;    }    buf->refcount = 1;    buf->release  = ng_free_video_buf;    return buf;}/* --------------------------------------------------------------------- */struct ng_audio_buf*ng_malloc_audio_buf(struct ng_audio_fmt *fmt, int size){    struct ng_audio_buf *buf;    buf = malloc(sizeof(*buf)+size);    memset(buf,0,sizeof(*buf));    buf->fmt  = *fmt;    buf->size = size;    buf->data = (char*)buf + sizeof(*buf);    return buf;}/* --------------------------------------------------------------------- */struct ng_attribute*ng_attr_byid(struct ng_attribute *attrs, int id){    if (NULL == attrs)	return NULL;    for (;;) {	if (NULL == attrs->name)	    return NULL;	if (attrs->id == id)	    return attrs;	attrs++;    }}struct ng_attribute*ng_attr_byname(struct ng_attribute *attrs, char *name){    if (NULL == attrs)	return NULL;    for (;;) {	if (NULL == attrs->name)	    return NULL;	if (0 == strcasecmp(attrs->name,name))	    return attrs;	attrs++;    }}const char*ng_attr_getstr(struct ng_attribute *attr, int value){    int i;        if (NULL == attr)	return NULL;    if (attr->type != ATTR_TYPE_CHOICE)	return NULL;    for (i = 0; attr->choices[i].str != NULL; i++)	if (attr->choices[i].nr == value)	    return attr->choices[i].str;    return NULL;}intng_attr_getint(struct ng_attribute *attr, char *value){    int i,val;        if (NULL == attr)	return -1;    if (attr->type != ATTR_TYPE_CHOICE)	return -1;    for (i = 0; attr->choices[i].str != NULL; i++) {	if (0 == strcasecmp(attr->choices[i].str,value))	    return attr->choices[i].nr;    }    if (isdigit(value[0])) {	/* Hmm.  String not found, but starts with a digit.	   Check if this is a valid number ... */	val = atoi(value);	for (i = 0; attr->choices[i].str != NULL; i++)	    if (val == attr->choices[i].nr)		return attr->choices[i].nr;	    }    return -1;}voidng_attr_listchoices(struct ng_attribute *attr){    int i;        fprintf(stderr,"valid choices for \"%s\": ",attr->name);    for (i = 0; attr->choices[i].str != NULL; i++)	fprintf(stderr,"%s\"%s\"",		i ? ", " : "",		attr->choices[i].str);    fprintf(stderr,"\n");}intng_attr_int2percent(struct ng_attribute *attr, int value){    int range,percent;    range   = attr->max - attr->min;    percent = (value - attr->min) * 100 / range;    if (percent < 0)	percent = 0;    if (percent > 100)	percent = 100;    return percent;}intng_attr_percent2int(struct ng_attribute *attr, int percent){    int range,value;    range = attr->max - attr->min;    value = percent * range / 100 + attr->min;    if (value < attr->min)	value = attr->min;    if (value > attr->max)	value = attr->max;    return value;}intng_attr_parse_int(struct ng_attribute *attr, char *str){    int value,n;    if (0 == sscanf(str,"%d%n",&value,&n))	/* parse error */	return attr->defval;    if (str[n] == '%')	value = ng_attr_percent2int(attr,value);    if (value < attr->min)	value = attr->min;    if (value > attr->max)	value = attr->max;    return value;}/* --------------------------------------------------------------------- */voidng_ratio_fixup(int *width, int *height, int *xoff, int *yoff){    int h = *height;    int w = *width;    if (0 == ng_ratio_x || 0 == ng_ratio_y)	return;    if (w * ng_ratio_y < h * ng_ratio_x) {	*height = *width * ng_ratio_y / ng_ratio_x;	if (yoff)	    *yoff  += (h-*height)/2;    } else if (w * ng_ratio_y > h * ng_ratio_x) {	*width  = *height * ng_ratio_x / ng_ratio_y;	if (yoff)	    *xoff  += (w-*width)/2;    }}voidng_ratio_fixup2(int *width, int *height, int *xoff, int *yoff,		int ratio_x, int ratio_y, int up){    int h = *height;    int w = *width;    if (0 == ratio_x || 0 == ratio_y)	return;    if ((!up  &&  w * ratio_y < h * ratio_x) ||	(up   &&  w * ratio_y > h * ratio_x)) {	*height = *width * ratio_y / ratio_x;	if (yoff)	    *yoff  += (h-*height)/2;    } else if ((!up  &&  w * ratio_y > h * ratio_x) ||	       (up   &&  w * ratio_y < h * ratio_x)) {	*width  = *height * ratio_x / ratio_y;	if (yoff)	    *xoff  += (w-*width)/2;    }}int64_tng_tofday_to_timestamp(struct timeval *tv){    long long ts;    ts  = tv->tv_sec;    ts *= 1000000;    ts += tv->tv_usec;    ts *= 1000;    return ts;}int64_tng_get_timestamp(){    struct timeval tv;    gettimeofday(&tv,NULL);    return ng_tofday_to_timestamp(&tv);}/* --------------------------------------------------------------------- */static void clip_dump(char *state, struct OVERLAY_CLIP *oc, int count){    int i;    fprintf(stderr,"clip: %s - %d clips\n",state,count);    for (i = 0; i < count; i++)	fprintf(stderr,"clip:   %d: %dx%d+%d+%d\n",i,		oc[i].x2 - oc[i].x1,		oc[i].y2 - oc[i].y1,		oc[i].x1, oc[i].y1);}static void clip_drop(struct OVERLAY_CLIP *oc, int n, int *count){    (*count)--;    memmove(oc+n, oc+n+1, sizeof(struct OVERLAY_CLIP) * (*count-n));}void ng_check_clipping(int width, int height, int xadjust, int yadjust,		       struct OVERLAY_CLIP *oc, int *count){    int i,j;    if (ng_debug > 1) {	fprintf(stderr,"clip: win=%dx%d xa=%d ya=%d\n",		width,height,xadjust,yadjust);	clip_dump("init",oc,*count);    }    for (i = 0; i < *count; i++) {	/* fixup coordinates */	oc[i].x1 += xadjust;	oc[i].x2 += xadjust;	oc[i].y1 += yadjust;	oc[i].y2 += yadjust;    }    if (ng_debug > 1)	clip_dump("fixup adjust",oc,*count);    for (i = 0; i < *count; i++) {	/* fixup borders */	if (oc[i].x1 < 0)	    oc[i].x1 = 0;	if (oc[i].x2 < 0)	    oc[i].x2 = 0;	if (oc[i].x1 > width)	    oc[i].x1 = width;	if (oc[i].x2 > width)	    oc[i].x2 = width;	if (oc[i].y1 < 0)	    oc[i].y1 = 0;	if (oc[i].y2 < 0)	    oc[i].y2 = 0;	if (oc[i].y1 > height)	    oc[i].y1 = height;	if (oc[i].y2 > height)	    oc[i].y2 = height;    }    if (ng_debug > 1)	clip_dump("fixup range",oc,*count);    /* drop zero-sized clips */    for (i = 0; i < *count;) {	if (oc[i].x1 == oc[i].x2 || oc[i].y1 == oc[i].y2) {	    clip_drop(oc,i,count);	    continue;	}	i++;    }    if (ng_debug > 1)	clip_dump("zerosize done",oc,*count);    /* try to merge clips */ restart_merge:    for (j = *count - 1; j >= 0; j--) {	for (i = 0; i < *count; i++) {	    if (i == j)		continue;	    if (oc[i].x1 == oc[j].x1 &&		oc[i].x2 == oc[j].x2 &&		oc[i].y1 <= oc[j].y1 &&		oc[i].y2 >= oc[j].y1) {		if (ng_debug > 1)		    fprintf(stderr,"clip: merge y %d,%d\n",i,j);		if (oc[i].y2 < oc[j].y2)		    oc[i].y2 = oc[j].y2;		clip_drop(oc,j,count);		if (ng_debug > 1)		    clip_dump("merge y done",oc,*count);		goto restart_merge;	    }	    if (oc[i].y1 == oc[j].y1 &&		oc[i].y2 == oc[j].y2 &&		oc[i].x1 <= oc[j].x1 &&		oc[i].x2 >= oc[j].x1) {		if (ng_debug > 1)		    fprintf(stderr,"clip: merge x %d,%d\n",i,j);		if (oc[i].x2 < oc[j].x2)		    oc[i].x2 = oc[j].x2;		clip_drop(oc,j,count);		if (ng_debug > 1)		    clip_dump("merge x done",oc,*count);		goto restart_merge;	    }	}    }    if (ng_debug)	clip_dump("final",oc,*count);}