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gstreamer/sys/v4l/grab-v4l.c
Thomas Vander Stichele 37c4906a74 first batch 
Original commit message from CVS:
first batch
2001-12-17 19:03:14 +00:00

973 lines
31 KiB
C
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/*
* interface to the v4l driver
*
* (c) 1997-99 Gerd Knorr <kraxel@goldbach.in-berlin.de>
*
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <math.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <signal.h>
#include <endian.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <X11/Intrinsic.h>
#include <asm/types.h> /* XXX glibc */
#include <linux/videodev.h>
#include "grab.h"
#define SYNC_TIMEOUT 1
/* ---------------------------------------------------------------------- */
/* experimental, interface might change */
#ifndef VIDIOCSWIN2
#define VIDIOCSWIN2 _IOW('v',28,struct video_window2)
struct video_window2
{
__u16 palette; /* Palette (aka video format) in use */
__u32 start; /* start address, relative to video_buffer.base */
__u32 pitch;
__u32 width;
__u32 height;
__u32 flags;
struct video_clip *clips;
int clipcount;
};
#endif
/* ---------------------------------------------------------------------- */
/* open+close */
static int grab_open(struct GRABBER *grab_v4l, char *filename);
static int grab_close(struct GRABBER *grab_v4l);
/* overlay */
static int grab_setupfb(struct GRABBER *grab_v4l, int sw, int sh, int format, void *base, int width);
static int grab_overlay(struct GRABBER *grab_v4l, int x, int y, int width, int height, int format,
OverlayClip *oc, int count);
static int grab_offscreen(struct GRABBER *grab_v4l, int start, int pitch, int width, int height,
int format);
/* capture */
static int grab_mm_setparams(struct GRABBER *grab_v4l, int format, int *width, int *height,
int *linelength);
static void* grab_mm_capture(struct GRABBER *grab_v4l, int single);
static void grab_mm_cleanup(struct GRABBER *grab_v4l);
static int grab_read_setparams(struct GRABBER *grab_v4l, int format, int *width, int *height,
int *linelength);
static void* grab_read_capture(struct GRABBER *grab_v4l, int single);
static void grab_read_cleanup(struct GRABBER *grab_v4l);
/* control */
static int grab_tune(struct GRABBER *grab_v4l, unsigned long freq);
static int grab_tuned(struct GRABBER *grab_v4l);
static int grab_input(struct GRABBER *grab_v4l, int input, int norm);
static int grab_hasattr(struct GRABBER *grab_v4l, int id);
static int grab_getattr(struct GRABBER *grab_v4l, int id);
static int grab_setattr(struct GRABBER *grab_v4l, int id, int val);
/* internal helpers */
static int grab_wait(struct GRABBER *grab_v4l, struct video_mmap *gb);
/* ---------------------------------------------------------------------- */
static const char *device_cap[] = {
"capture", "tuner", "teletext", "overlay", "chromakey", "clipping",
"frameram", "scales", "monochrome", NULL
};
static const char *device_pal[] = {
"-", "grey", "hi240", "rgb16", "rgb24", "rgb32", "rgb15",
"yuv422", "yuyv", "uyvy", "yuv420", "yuv411", "raw",
"yuv422p", "yuv411p", "yuv420p", "yuv410p"
};
#define PALETTE(x) ((x < sizeof(device_pal)/sizeof(char*)) ? device_pal[x] : "UNKNOWN")
static const struct STRTAB stereo[] = {
{ 0, "auto" },
{ 1, "mono" },
{ 2, "stereo" },
{ 4, "lang1" },
{ 8, "lang2" },
{ -1, NULL, },
};
static struct STRTAB norms[] = {
{ 0, "PAL" },
{ 1, "NTSC" },
{ 2, "SECAM" },
{ 3, "AUTO" },
{ -1, NULL }
};
static const struct STRTAB norms_bttv[] = {
{ 0, "PAL" },
{ 1, "NTSC" },
{ 2, "SECAM" },
{ 3, "PAL-NC" },
{ 4, "PAL-M" },
{ 5, "PAL-N" },
{ 6, "NTSC-JP" },
{ -1, NULL }
};
static int gb_pal[] = {
0, 0, 0, 0, 0,
0, 0, 0, 0, 0,
0, 0, 0, 0, 0,
0, 0, 0, 0, 0
};
static const unsigned short format2palette[] = {
0,/* unused */
VIDEO_PALETTE_HI240,/* RGB8 */
VIDEO_PALETTE_GREY,/* GRAY8 */
#if __BYTE_ORDER == __BIG_ENDIAN
0,
0,
VIDEO_PALETTE_RGB555,/* RGB15_BE */
VIDEO_PALETTE_RGB565,/* RGB16_BE */
0,
0,
VIDEO_PALETTE_RGB24,/* RGB24 */
VIDEO_PALETTE_RGB32,/* RGB32 */
#else
VIDEO_PALETTE_RGB555,/* RGB15_LE */
VIDEO_PALETTE_RGB565,/* RGB16_LE */
0,
0,
VIDEO_PALETTE_RGB24,/* BGR24 */
VIDEO_PALETTE_RGB32,/* BGR32 */
0,
0,
#endif
0, /* LUT 2 */
0, /* LUT 4 */
VIDEO_PALETTE_YUV422, /* YUV422 */
VIDEO_PALETTE_YUV422P, /* YUV422P */
VIDEO_PALETTE_YUV420P, /* YUV420P */
};
static const unsigned int format2depth[] = {
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, /* YUV422 */
16, /* YUV422P */
12, /* YUV420P */
0, /* MJPEG */
};
static const unsigned char* format_desc[] = {
"",
"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",
"16 bit YUV 4:2:2 (planar)",
"12 bit YUV 4:2:0 (planar)",
"MJPEG"
};
/* pass 0/1 by reference */
static const int one = 1, zero = 0;
/* ---------------------------------------------------------------------- */
static const struct GRAB_ATTR init_grab_attr[] =
{
{ GRAB_ATTR_VOLUME, 1, VIDIOCGAUDIO, VIDIOCSAUDIO, NULL },
{ GRAB_ATTR_MUTE, 1, VIDIOCGAUDIO, VIDIOCSAUDIO, NULL },
{ GRAB_ATTR_MODE, 1, VIDIOCGAUDIO, VIDIOCSAUDIO, NULL },
{ GRAB_ATTR_COLOR, 1, VIDIOCGPICT, VIDIOCSPICT, NULL },
{ GRAB_ATTR_BRIGHT, 1, VIDIOCGPICT, VIDIOCSPICT, NULL },
{ GRAB_ATTR_HUE, 1, VIDIOCGPICT, VIDIOCSPICT, NULL },
{ GRAB_ATTR_CONTRAST, 1, VIDIOCGPICT, VIDIOCSPICT, NULL },
};
struct GRABBER *grab_init()
{
struct GRABBER *new_grabber;
new_grabber = malloc(sizeof(struct GRABBER));
new_grabber->name = "v4l";
new_grabber->flags = 0;
new_grabber->norms = norms;
new_grabber->inputs = NULL;
new_grabber->opened = 0;
new_grabber->fd = -1;
new_grabber->overlay = 0;
new_grabber->audio_modes = stereo;
new_grabber->grab_open = grab_open;
new_grabber->grab_close = grab_close;
new_grabber->grab_setupfb = grab_setupfb;
new_grabber->grab_overlay = NULL;
new_grabber->grab_offscreen = NULL;
new_grabber->grab_setparams = NULL;
new_grabber->grab_capture = NULL;
new_grabber->grab_cleanup = NULL;
new_grabber->grab_tune = grab_tune;
new_grabber->grab_tuned = grab_tuned;
new_grabber->grab_input = grab_input;
new_grabber->grab_hasattr = grab_hasattr;
new_grabber->grab_getattr = grab_getattr;
new_grabber->grab_setattr = grab_setattr;
memcpy(new_grabber->grab_attr, init_grab_attr, sizeof(init_grab_attr));
new_grabber->grab_attr[0].arg = &new_grabber->audio;
new_grabber->grab_attr[1].arg = &new_grabber->audio;
new_grabber->grab_attr[2].arg = &new_grabber->audio;
new_grabber->grab_attr[3].arg = &new_grabber->pict;
new_grabber->grab_attr[4].arg = &new_grabber->pict;
new_grabber->grab_attr[5].arg = &new_grabber->pict;
new_grabber->grab_attr[6].arg = &new_grabber->pict;
return new_grabber;
}
/* FIXME this isn't used (yet?)
static void grab_cleanup(struct GRABBER *grab_v4l)
{
}
*/
static int grab_open(struct GRABBER *grab_v4l, char *filename)
{
int i;
if (-1 != grab_v4l->fd)
goto err;
if (-1 == (grab_v4l->fd = open(filename ? filename : "/dev/video",O_RDWR))) {
fprintf(stderr,"v4l: open %s: %s\n",
filename ? filename : "/dev/video",strerror(errno));
goto err;
}
if (-1 == ioctl(grab_v4l->fd,VIDIOCGCAP,&grab_v4l->capability)) {
perror("v4l: open\n");
goto err;
}
fprintf(stderr, "v4l: open\n");
fcntl(grab_v4l->fd,F_SETFD,FD_CLOEXEC);
fprintf(stderr,"v4l: device is %s\n",grab_v4l->capability.name);
sprintf(grab_v4l->name = malloc(strlen(grab_v4l->capability.name)+8),
"v4l: %s",grab_v4l->capability.name);
fprintf(stderr,"v4l: capabilities: ");
for (i = 0; device_cap[i] != NULL; i++)
if (grab_v4l->capability.type & (1 << i))
fprintf(stderr," %s",device_cap[i]);
fprintf(stderr,"\n");
/* input sources */
fprintf(stderr,"v4l: channels: %d\n",grab_v4l->capability.channels);
grab_v4l->channels = malloc(sizeof(struct video_channel)*grab_v4l->capability.channels);
memset(grab_v4l->channels,0,sizeof(struct video_channel)*grab_v4l->capability.channels);
grab_v4l->inputs = malloc(sizeof(struct STRTAB)*(grab_v4l->capability.channels+1));
memset(grab_v4l->inputs,0,sizeof(struct STRTAB)*(grab_v4l->capability.channels+1));
for (i = 0; i < grab_v4l->capability.channels; i++) {
grab_v4l->channels[i].channel = i;
if (-1 == ioctl(grab_v4l->fd,VIDIOCGCHAN,&grab_v4l->channels[i]))
perror("v4l: ioctl VIDIOCGCHAN"), exit(0);
grab_v4l->inputs[i].nr = i;
grab_v4l->inputs[i].str = grab_v4l->channels[i].name;
fprintf(stderr,"v4l: %s: %d %s%s %s%s\n",
grab_v4l->channels[i].name,
grab_v4l->channels[i].tuners,
(grab_v4l->channels[i].flags & VIDEO_VC_TUNER) ? "tuner " : "",
(grab_v4l->channels[i].flags & VIDEO_VC_AUDIO) ? "audio " : "",
(grab_v4l->channels[i].type & VIDEO_TYPE_TV) ? "tv " : "",
(grab_v4l->channels[i].type & VIDEO_TYPE_CAMERA) ? "camera " : "");
}
grab_v4l->inputs[i].nr = -1;
grab_v4l->inputs[i].str = NULL;
/* ioctl probe, switch to input 0 */
if (-1 == ioctl(grab_v4l->fd,VIDIOCSCHAN,&grab_v4l->channels[0])) {
fprintf(stderr,"v4l: you need a newer bttv version (>= 0.5.14)\n");
goto err;
}
/* audios */
fprintf(stderr,"v4l: audios : %d\n",grab_v4l->capability.audios);
if (grab_v4l->capability.audios) {
grab_v4l->audio.audio = 0;
if (-1 == ioctl(grab_v4l->fd,VIDIOCGAUDIO,&grab_v4l->audio))
perror("v4l: ioctl VIDIOCGCAUDIO") /* , exit(0) */ ;
fprintf(stderr,"v4l: %d (%s): ",i,grab_v4l->audio.name);
if (grab_v4l->audio.flags & VIDEO_AUDIO_MUTABLE)
fprintf(stderr,"muted=%s ",
(grab_v4l->audio.flags&VIDEO_AUDIO_MUTE) ? "yes":"no");
if (grab_v4l->audio.flags & VIDEO_AUDIO_VOLUME)
fprintf(stderr,"volume=%d ",grab_v4l->audio.volume);
if (grab_v4l->audio.flags & VIDEO_AUDIO_BASS)
fprintf(stderr,"bass=%d ",grab_v4l->audio.bass);
if (grab_v4l->audio.flags & VIDEO_AUDIO_TREBLE)
fprintf(stderr,"treble=%d ",grab_v4l->audio.treble);
fprintf(stderr,"\n");
if (!(grab_v4l->audio.flags & VIDEO_AUDIO_VOLUME)) {
grab_v4l->grab_attr[0].have = 0; /* volume */
}
} else {
grab_v4l->grab_attr[0].have = 0; /* volume */
grab_v4l->grab_attr[1].have = 0; /* mute */
grab_v4l->grab_attr[2].have = 0; /* audio mode */
}
fprintf(stderr,"v4l: size : %dx%d => %dx%d\n",
grab_v4l->capability.minwidth,grab_v4l->capability.minheight,
grab_v4l->capability.maxwidth,grab_v4l->capability.maxheight);
/* tuner (more than one???) */
if (grab_v4l->capability.type & VID_TYPE_TUNER) {
grab_v4l->tuner = malloc(sizeof(struct video_tuner));
memset(grab_v4l->tuner,0,sizeof(struct video_tuner));
if (-1 == ioctl(grab_v4l->fd,VIDIOCGTUNER,grab_v4l->tuner))
perror("v4l: ioctl VIDIOCGTUNER");
fprintf(stderr,"v4l: tuner : %s %lu-%lu",
grab_v4l->tuner->name,grab_v4l->tuner->rangelow,grab_v4l->tuner->rangehigh);
for (i = 0; norms[i].str != NULL; i++) {
if (grab_v4l->tuner->flags & (1<<i)) {
fprintf(stderr," %s",norms[i].str);
} else
norms[i].nr = -1;
}
fprintf(stderr,"\n");
} else {
struct video_channel vchan;
memcpy(&vchan, &grab_v4l->channels[0], sizeof(struct video_channel));
for (i = 0; norms[i].str != NULL; i++) {
vchan.norm = i;
if (-1 == ioctl(grab_v4l->fd,VIDIOCSCHAN,&vchan))
norms[i].nr = -1;
fprintf(stderr," %s",norms[i].str);
}
fprintf(stderr,"\n");
if (-1 == ioctl(grab_v4l->fd,VIDIOCSCHAN,&grab_v4l->channels[0])) {
fprintf(stderr,"v4l: you need a newer bttv version (>= 0.5.14)\n");
goto err;
}
grab_v4l->grab_tune = NULL;
grab_v4l->grab_tuned = NULL;
}
#if 1
#define BTTV_VERSION _IOR('v' , BASE_VIDIOCPRIVATE+6, int)
/* dirty hack time / v4l design flaw -- works with bttv only
* this adds support for a few less common PAL versions */
if (-1 != ioctl(grab_v4l->fd,BTTV_VERSION,0)) {
grab_v4l->norms = norms_bttv;
}
#endif
/* frame buffer */
if (-1 == ioctl(grab_v4l->fd,VIDIOCGFBUF,&grab_v4l->ov_fbuf))
perror("v4l: ioctl VIDIOCGFBUF");
fprintf(stderr,"v4l: fbuffer : base=0x%p size=%dx%d depth=%d bpl=%d\n",
grab_v4l->ov_fbuf.base, grab_v4l->ov_fbuf.width, grab_v4l->ov_fbuf.height,
grab_v4l->ov_fbuf.depth, grab_v4l->ov_fbuf.bytesperline);
/* picture parameters */
if (-1 == ioctl(grab_v4l->fd,VIDIOCGPICT,&grab_v4l->pict))
perror("v4l: ioctl VIDIOCGPICT");
fprintf(stderr,
"v4l: picture : brightness=%d hue=%d colour=%d contrast=%d\n",
grab_v4l->pict.brightness, grab_v4l->pict.hue, grab_v4l->pict.colour, grab_v4l->pict.contrast);
fprintf(stderr,
"v4l: picture : whiteness=%d depth=%d palette=%s\n",
grab_v4l->pict.whiteness, grab_v4l->pict.depth, PALETTE(grab_v4l->pict.palette));
/* map grab buffer */
if (-1 == ioctl(grab_v4l->fd,VIDIOCGMBUF,&grab_v4l->gb_buffers)) {
perror("v4l: ioctl VIDIOCGMBUF");
}
grab_v4l->map = mmap(0,grab_v4l->gb_buffers.size,PROT_READ|PROT_WRITE,MAP_SHARED,grab_v4l->fd,0);
if ((char*)-1 != grab_v4l->map) {
grab_v4l->grab_setparams = grab_mm_setparams;
grab_v4l->grab_capture = grab_mm_capture;
grab_v4l->grab_cleanup = grab_mm_cleanup;
} else {
perror("v4l: mmap");
grab_v4l->grab_setparams = grab_read_setparams;
grab_v4l->grab_capture = grab_read_capture;
grab_v4l->grab_cleanup = grab_read_cleanup;
}
grab_v4l->opened = 1;
return grab_v4l->fd;
err:
if (grab_v4l->fd != -1) {
close(grab_v4l->fd);
grab_v4l->fd = -1;
}
return -1;
}
static int
grab_close(struct GRABBER *grab_v4l)
{
if (-1 == grab_v4l->fd)
return 0;
if (grab_v4l->gb_grab > grab_v4l->gb_sync)
grab_wait(grab_v4l, grab_v4l->even ? &grab_v4l->gb_even : &grab_v4l->gb_odd);
if ((char*)-1 != grab_v4l->map)
munmap(grab_v4l->map,grab_v4l->gb_buffers.size);
fprintf(stderr, "v4l: close\n");
close(grab_v4l->fd);
grab_v4l->fd = -1;
grab_v4l->opened = 0;
return 0;
}
/* ---------------------------------------------------------------------- */
/* do overlay */
static int
grab_setupfb(struct GRABBER *grab_v4l, int sw, int sh, int format, void *base, int bpl)
{
int settings_ok = 1;
grab_v4l->swidth = sw;
grab_v4l->sheight = sh;
/* double-check settings */
fprintf(stderr,"v4l: %dx%d, %d bit/pixel, %d byte/scanline\n",
grab_v4l->ov_fbuf.width,grab_v4l->ov_fbuf.height,
grab_v4l->ov_fbuf.depth,grab_v4l->ov_fbuf.bytesperline);
if ((bpl > 0 && grab_v4l->ov_fbuf.bytesperline != bpl) ||
(grab_v4l->ov_fbuf.width != sw) ||
(grab_v4l->ov_fbuf.height != sh)) {
fprintf(stderr,"v4l: WARNING: v4l and dga disagree about the screen size\n");
fprintf(stderr,"v4l: WARNING: Is v4l-conf installed correctly?\n");
settings_ok = 0;
}
if (format2depth[format] != ((grab_v4l->ov_fbuf.depth+7)&0xf8)) {
fprintf(stderr,"v4l: WARNING: v4l and dga disagree about the color depth\n");
fprintf(stderr,"v4l: WARNING: Is v4l-conf installed correctly?\n");
fprintf(stderr,"%d %d\n",format2depth[format],grab_v4l->ov_fbuf.depth);
settings_ok = 0;
}
if (settings_ok) {
grab_v4l->grab_overlay = grab_overlay;
grab_v4l->grab_offscreen = grab_offscreen;
return 0;
} else {
fprintf(stderr,"v4l: WARNING: overlay mode disabled\n");
return -1;
}
}
static int
grab_overlay(struct GRABBER *grab_v4l, int x, int y, int width, int height, int format,
OverlayClip *oc, int count)
{
int i,xadjust=0,yadjust=0;
//fprintf(stderr,"v4l: overlay %d %d\n", x, y);
if (width == 0 || height == 0) {
//fprintf(stderr,"v4l: overlay off\n");
ioctl(grab_v4l->fd, VIDIOCCAPTURE, &zero);
grab_v4l->overlay = 0;
return 0;
}
grab_v4l->ov_win.x = x;
grab_v4l->ov_win.y = y;
grab_v4l->ov_win.width = width;
grab_v4l->ov_win.height = height;
grab_v4l->ov_win.flags = 0;
/* check against max. size */
ioctl(grab_v4l->fd,VIDIOCGCAP,&grab_v4l->capability);
if (grab_v4l->ov_win.width > grab_v4l->capability.maxwidth) {
grab_v4l->ov_win.width = grab_v4l->capability.maxwidth;
grab_v4l->ov_win.x += (width - grab_v4l->ov_win.width)/2;
}
if (grab_v4l->ov_win.height > grab_v4l->capability.maxheight) {
grab_v4l->ov_win.height = grab_v4l->capability.maxheight;
grab_v4l->ov_win.y += (height - grab_v4l->ov_win.height)/2;
}
/* pass aligned values -- the driver does'nt get it right yet */
grab_v4l->ov_win.width &= ~3;
grab_v4l->ov_win.height &= ~3;
grab_v4l->ov_win.x &= ~3;
if (grab_v4l->ov_win.x < x) grab_v4l->ov_win.x += 4;
if (grab_v4l->ov_win.x+grab_v4l->ov_win.width > x+width) grab_v4l->ov_win.width -= 4;
/* fixups */
xadjust = grab_v4l->ov_win.x - x;
yadjust = grab_v4l->ov_win.y - y;
if (grab_v4l->capability.type & VID_TYPE_CLIPPING) {
grab_v4l->ov_win.clips = grab_v4l->ov_clips;
grab_v4l->ov_win.clipcount = count;
for (i = 0; i < count; i++) {
grab_v4l->ov_clips[i].x = oc[i].x1 - xadjust;
grab_v4l->ov_clips[i].y = oc[i].y1 - yadjust;
grab_v4l->ov_clips[i].width = oc[i].x2-oc[i].x1 /* XXX */;
grab_v4l->ov_clips[i].height = oc[i].y2-oc[i].y1;
//fprintf(stderr,"v4l: clip=%dx%d+%d+%d\n",
//grab_v4l->ov_clips[i].width,grab_v4l->ov_clips[i].height,
//grab_v4l->ov_clips[i].x,grab_v4l->ov_clips[i].y);
}
}
if (grab_v4l->capability.type & VID_TYPE_CHROMAKEY) {
grab_v4l->ov_win.chromakey = 0; /* XXX */
}
if (-1 == ioctl(grab_v4l->fd, VIDIOCSWIN, &grab_v4l->ov_win))
perror("v4l: ioctl VIDIOCSWIN");
if (!grab_v4l->overlay) {
grab_v4l->pict.palette =
(format < sizeof(format2palette)/sizeof(unsigned short))?
format2palette[format]: 0;
if(grab_v4l->pict.palette == 0) {
fprintf(stderr,"v4l: unsupported overlay video format: %s\n",
format_desc[format]);
return -1;
}
if (-1 == ioctl(grab_v4l->fd,VIDIOCSPICT,&grab_v4l->pict))
perror("v4l: ioctl VIDIOCSPICT");
if (-1 == ioctl(grab_v4l->fd, VIDIOCCAPTURE, &one))
perror("v4l: ioctl VIDIOCCAPTURE");
grab_v4l->overlay = 1;
}
//fprintf(stderr,"v4l: overlay win=%dx%d+%d+%d, %d clips\n",
// width,height,x,y, count);
return 0;
}
static int
grab_offscreen(struct GRABBER *grab_v4l, int start, int pitch, int width, int height, int format)
{
struct video_window2 vo;
if (width == 0 || height == 0) {
fprintf(stderr,"v4l: offscreen off\n");
ioctl(grab_v4l->fd, VIDIOCCAPTURE, &zero);
grab_v4l->overlay = 0;
return 0;
}
vo.palette = VIDEO_PALETTE_YUV422; /* FIXME */
vo.start = start;
vo.pitch = pitch;
vo.width = width;
vo.height = height;
vo.flags = 0;
vo.clips = NULL;
vo.clipcount = 0;
if (-1 == ioctl(grab_v4l->fd_grab,VIDIOCSWIN2,&vo))
perror("v4l: ioctl VIDIOCSOFFSCREEN");
if (-1 == ioctl(grab_v4l->fd_grab,VIDIOCCAPTURE,&one))
perror("v4l: ioctl VIDIOCCAPTURE");
fprintf(stderr,"v4l: offscreen size=%dx%d\n",
width,height);
return 0;
}
/* ---------------------------------------------------------------------- */
/* capture using mmaped buffers (with double-buffering, ...) */
static int
grab_queue(struct GRABBER *grab_v4l, struct video_mmap *gb, int probe)
{
//fprintf(stderr,"g%d",gb->frame);
#if 0
/* might be useful for debugging driver problems */
memset(map + grab_v4l->gb_buffers.offsets[gb->frame],0,
grab_v4l->gb_buffers.size/grab_v4l->gb_buffers.frames);
#endif
if (-1 == ioctl(grab_v4l->fd,VIDIOCMCAPTURE,gb)) {
if (errno == EAGAIN)
fprintf(stderr,"v4l: grabber chip can't sync (no station tuned in?)\n");
else
if (!probe)
fprintf(stderr,"v4l: ioctl VIDIOCMCAPTURE(%d,%s,%dx%d): %s\n",
gb->frame,PALETTE(gb->format),gb->width,gb->height,
strerror(errno));
return -1;
}
//fprintf(stderr,"* ");
grab_v4l->gb_grab++;
return 0;
}
static int
grab_wait(struct GRABBER *grab_v4l, struct video_mmap *gb)
{
int ret = 0;
//alarm(SYNC_TIMEOUT);
//fprintf(stderr,"s%d",gb->frame);
if (-1 == ioctl(grab_v4l->fd,VIDIOCSYNC,&(gb->frame))) {
//perror("v4l: ioctl VIDIOCSYNC");
ret = -1;
}
grab_v4l->gb_sync++;
//fprintf(stderr,"* ");
//alarm(0);
return ret;
}
static int
grab_probe(struct GRABBER *grab_v4l, int format)
{
struct video_mmap gb;
if (0 != gb_pal[format])
goto done;
gb.frame = 0;
gb.width = 64;
gb.height = 48;
fprintf(stderr, "v4l: capture probe %s...\t", device_pal[format]);
gb.format = format;
if (-1 == grab_queue(grab_v4l, &gb,1)) {
gb_pal[format] = 2;
goto done;
}
if (-1 == grab_wait(grab_v4l, &gb)) {
gb_pal[format] = 2;
goto done;
}
gb_pal[format] = 1;
fprintf(stderr, "ok\n");
done:
return gb_pal[format] == 1;
}
static int
grab_mm_setparams(struct GRABBER *grab_v4l, int format, int *width, int *height, int *linelength)
{
//if (!grab_v4l->opened) return -1;
/* finish old stuff */
if (grab_v4l->gb_grab > grab_v4l->gb_sync)
grab_wait(grab_v4l, grab_v4l->even ? &grab_v4l->gb_even : &grab_v4l->gb_odd);
/* verify parameters */
ioctl(grab_v4l->fd,VIDIOCGCAP,&grab_v4l->capability);
if (*width > grab_v4l->capability.maxwidth)
*width = grab_v4l->capability.maxwidth;
if (*height > grab_v4l->capability.maxheight)
*height = grab_v4l->capability.maxheight;
*linelength = *width * format2depth[format] / 8;
#if 1
/* XXX bttv bug workaround - it returns a larger size than it can handle */
if (*width > 768+76) {
*width = 768+76;
*linelength = *width * format2depth[format] / 8;
}
#endif
/* initialize everything */
grab_v4l->gb_even.format = grab_v4l->gb_odd.format =
(format < sizeof(format2palette)/sizeof(unsigned short)) ?
format2palette[format] : 0;
if (grab_v4l->gb_even.format == 0 || !grab_probe(grab_v4l, grab_v4l->gb_even.format)) {
return -1;
}
grab_v4l->pixmap_bytes = format2depth[format] / 8;
grab_v4l->gb_even.frame = 0;
grab_v4l->gb_odd.frame = 1;
grab_v4l->gb_even.width = *width;
grab_v4l->gb_even.height = *height;
grab_v4l->gb_odd.width = *width;
grab_v4l->gb_odd.height = *height;
grab_v4l->even = 0;
return 0;
}
static void*
grab_mm_capture(struct GRABBER *grab_v4l, int single)
{
void *buf;
if (!single && grab_v4l->gb_grab == grab_v4l->gb_sync)
/* streaming capture started */
if (-1 == grab_queue(grab_v4l, grab_v4l->even ? &grab_v4l->gb_even : &grab_v4l->gb_odd,0))
return NULL;
if (single && grab_v4l->gb_grab > grab_v4l->gb_sync)
/* clear streaming capture */
grab_wait(grab_v4l, grab_v4l->even ? &grab_v4l->gb_even : &grab_v4l->gb_odd);
/* queue */
if (-1 == grab_queue(grab_v4l, grab_v4l->even ? &grab_v4l->gb_odd : &grab_v4l->gb_even,0))
return NULL;
if (grab_v4l->gb_grab > grab_v4l->gb_sync+1) {
/* wait -- streaming */
//fprintf(stderr, "v4lsrc: 1 %d %d\n", grab_v4l->gb_grab, gb_sync);
grab_wait(grab_v4l, grab_v4l->even ? &grab_v4l->gb_even : &grab_v4l->gb_odd);
buf = grab_v4l->map + grab_v4l->gb_buffers.offsets[grab_v4l->even ? 0 : 1];
} else {
/* wait -- single */
//fprintf(stderr, "v4lsrc: 2 %d %d %d\n", grab_v4l->gb_grab, gb_sync, even);
grab_wait(grab_v4l, grab_v4l->even ? &grab_v4l->gb_odd : &grab_v4l->gb_even);
buf = grab_v4l->map + grab_v4l->gb_buffers.offsets[grab_v4l->even ? 1 : 0];
}
grab_v4l->even = !grab_v4l->even;
//fprintf(stderr, "v4lsrc: even %d\n", even);
return buf;
}
static void
grab_mm_cleanup(struct GRABBER *grab_v4l)
{
if (grab_v4l->gb_grab > grab_v4l->gb_sync)
grab_wait(grab_v4l, grab_v4l->even ? &grab_v4l->gb_even : &grab_v4l->gb_odd);
}
/* ---------------------------------------------------------------------- */
/* capture using simple read() */
static int
grab_read_setparams(struct GRABBER *grab_v4l, int format, int *width, int *height, int *linelength)
{
struct video_window win;
grab_v4l->pict.depth = format2depth[format];
grab_v4l->pict.palette = format2palette[format];
/* set format */
if (-1 == ioctl(grab_v4l->fd,VIDIOCSPICT,&grab_v4l->pict)) {
perror("v4l: ioctl VIDIOCSPICT");
return -1;
}
if (-1 == ioctl(grab_v4l->fd,VIDIOCGPICT,&grab_v4l->pict)) {
perror("v4l: ioctl VIDIOCGPICT");
return -1;
}
/* set size */
ioctl(grab_v4l->fd,VIDIOCGCAP,&grab_v4l->capability);
if (*width > grab_v4l->capability.maxwidth)
*width = grab_v4l->capability.maxwidth;
if (*height > grab_v4l->capability.maxheight)
*height = grab_v4l->capability.maxheight;
memset(&win,0,sizeof(struct video_window));
win.width = *width;
win.height = *height;
if (-1 == ioctl(grab_v4l->fd,VIDIOCSWIN,&win)) {
perror("v4l: ioctl VIDIOCSWIN");
return -1;
}
if (-1 == ioctl(grab_v4l->fd,VIDIOCGWIN,&win)) {
perror("v4l: ioctl VIDIOCGWIN");
return -1;
}
*width = win.width;
*height = win.height;
*linelength = *width * format2depth[format] / 8;
/* alloc buffer */
grab_v4l->grab_read_size = *linelength * *height;
if (grab_v4l->grab_read_buf)
free(grab_v4l->grab_read_buf);
grab_v4l->grab_read_buf = malloc(grab_v4l->grab_read_size);
if (NULL == grab_v4l->grab_read_buf)
return -1;
return 0;
}
static void*
grab_read_capture(struct GRABBER *grab_v4l, int single)
{
int rc;
rc = read(grab_v4l->fd,grab_v4l->grab_read_buf,grab_v4l->grab_read_size);
if (grab_v4l->grab_read_size != rc) {
fprintf(stderr,"v4l: grabber read error (rc=%d)\n",rc);
return NULL;
}
return grab_v4l->grab_read_buf;
}
static void
grab_read_cleanup(struct GRABBER *grab_v4l)
{
if (grab_v4l->grab_read_buf) {
free(grab_v4l->grab_read_buf);
grab_v4l->grab_read_buf = NULL;
}
}
/* ---------------------------------------------------------------------- */
static int
grab_tune(struct GRABBER *grab_v4l, unsigned long freq)
{
freq = freq*16/1000;
fprintf(stderr,"v4l: freq: %.3f\n",(float)freq/16);
if (-1 == ioctl(grab_v4l->fd, VIDIOCSFREQ, &freq))
perror("v4l: ioctl VIDIOCSFREQ");
return 0;
}
static int
grab_tuned(struct GRABBER *grab_v4l)
{
usleep(10000);
if (-1 == ioctl(grab_v4l->fd,VIDIOCGTUNER,grab_v4l->tuner)) {
perror("v4l: ioctl VIDIOCGTUNER");
return 0;
}
return grab_v4l->tuner->signal ? 1 : 0;
}
static int
grab_input(struct GRABBER *grab_v4l, int input, int norm)
{
if (-1 != input) {
fprintf(stderr,"v4l: input: %d\n",input);
grab_v4l->cur_input = input;
}
if (-1 != norm) {
fprintf(stderr,"v4l: norm : %d\n",norm);
grab_v4l->cur_norm = norm;
}
grab_v4l->channels[grab_v4l->cur_input].norm = grab_v4l->cur_norm;
if (-1 == ioctl(grab_v4l->fd, VIDIOCSCHAN, &grab_v4l->channels[grab_v4l->cur_input]))
perror("v4l: ioctl VIDIOCSCHAN");
return 0;
}
/* ---------------------------------------------------------------------- */
int grab_hasattr(struct GRABBER *grab_v4l, int id)
{
int i;
for (i = 0; i < NUM_ATTR; i++)
if (id == grab_v4l->grab_attr[i].id && grab_v4l->grab_attr[i].have)
break;
if (i == NUM_ATTR)
return 0;
return 1;
}
int grab_getattr(struct GRABBER *grab_v4l, int id)
{
int i;
for (i = 0; i < NUM_ATTR; i++)
if (id == grab_v4l->grab_attr[i].id && grab_v4l->grab_attr[i].have)
break;
if (i == NUM_ATTR)
return -1;
if (-1 == ioctl(grab_v4l->fd,grab_v4l->grab_attr[i].get,grab_v4l->grab_attr[i].arg))
perror("v4l: ioctl get");
switch (id) {
case GRAB_ATTR_VOLUME: return grab_v4l->audio.volume;
case GRAB_ATTR_MUTE: return grab_v4l->audio.flags & VIDEO_AUDIO_MUTE;
case GRAB_ATTR_MODE: return grab_v4l->audio.mode;
case GRAB_ATTR_COLOR: return grab_v4l->pict.contrast;
case GRAB_ATTR_BRIGHT: return grab_v4l->pict.contrast;
case GRAB_ATTR_HUE: return grab_v4l->pict.contrast;
case GRAB_ATTR_CONTRAST: return grab_v4l->pict.contrast;
default: return -1;
}
}
int grab_setattr(struct GRABBER *grab_v4l, int id, int val)
{
int i;
/* read ... */
for (i = 0; i < NUM_ATTR; i++)
if (id == grab_v4l->grab_attr[i].id && grab_v4l->grab_attr[i].have)
break;
if (i == NUM_ATTR)
return -1;
if (-1 == ioctl(grab_v4l->fd,grab_v4l->grab_attr[i].set,grab_v4l->grab_attr[i].arg))
perror("v4l: ioctl get");
/* ... modify ... */
switch (id) {
case GRAB_ATTR_VOLUME: grab_v4l->audio.volume = val; break;
case GRAB_ATTR_MUTE:
if (val)
grab_v4l->audio.flags |= VIDEO_AUDIO_MUTE;
else
grab_v4l->audio.flags &= ~VIDEO_AUDIO_MUTE;
break;
case GRAB_ATTR_MODE: grab_v4l->audio.mode = val; break;
case GRAB_ATTR_COLOR: grab_v4l->pict.colour = val; break;
case GRAB_ATTR_BRIGHT: grab_v4l->pict.brightness = val; break;
case GRAB_ATTR_HUE: grab_v4l->pict.hue = val; break;
case GRAB_ATTR_CONTRAST: grab_v4l->pict.contrast = val; break;
default: return -1;
}
/* ... write */
if (-1 == ioctl(grab_v4l->fd,grab_v4l->grab_attr[i].set,grab_v4l->grab_attr[i].arg))
perror("v4l: ioctl set");
return 0;
}
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