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923bd441fe
FFmpeg/libavformat/grab.c
Michael Niedermayer 568e18b15e integer overflows, heap corruption 
possible arbitrary code execution cannot be ruled out in some cases
precautionary checks

Originally committed as revision 3813 to svn://svn.ffmpeg.org/ffmpeg/trunk
2005-01-08 14:21:33 +00:00

855 lines
28 KiB
C
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/*
* Linux video grab interface
* Copyright (c) 2000,2001 Fabrice Bellard.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "avformat.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/time.h>
#define _LINUX_TIME_H 1
#include <linux/videodev.h>
#include <time.h>
typedef struct {
int fd;
int frame_format; /* see VIDEO_PALETTE_xxx */
int use_mmap;
int width, height;
int frame_rate;
int frame_rate_base;
int64_t time_frame;
int frame_size;
struct video_capability video_cap;
struct video_audio audio_saved;
uint8_t *video_buf;
struct video_mbuf gb_buffers;
struct video_mmap gb_buf;
int gb_frame;
/* ATI All In Wonder specific stuff */
/* XXX: remove and merge in libavcodec/imgconvert.c */
int aiw_enabled;
int deint;
int halfw;
uint8_t *src_mem;
uint8_t *lum_m4_mem;
} VideoData;
static int aiw_init(VideoData *s);
static int aiw_read_picture(VideoData *s, uint8_t *data);
static int aiw_close(VideoData *s);
static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
{
VideoData *s = s1->priv_data;
AVStream *st;
int width, height;
int video_fd, frame_size;
int ret, frame_rate, frame_rate_base;
int desired_palette;
struct video_tuner tuner;
struct video_audio audio;
const char *video_device;
int j;
if (!ap || ap->width <= 0 || ap->height <= 0 || ap->frame_rate <= 0)
return -1;
width = ap->width;
height = ap->height;
frame_rate = ap->frame_rate;
frame_rate_base = ap->frame_rate_base;
if((unsigned)width > 32767 || (unsigned)height > 32767)
return -1;
st = av_new_stream(s1, 0);
if (!st)
return -ENOMEM;
av_set_pts_info(st, 48, 1, 1000000); /* 48 bits pts in us */
s->width = width;
s->height = height;
s->frame_rate = frame_rate;
s->frame_rate_base = frame_rate_base;
video_device = ap->device;
if (!video_device)
video_device = "/dev/video";
video_fd = open(video_device, O_RDWR);
if (video_fd < 0) {
perror(video_device);
goto fail;
}
if (ioctl(video_fd,VIDIOCGCAP, &s->video_cap) < 0) {
perror("VIDIOCGCAP");
goto fail;
}
if (!(s->video_cap.type & VID_TYPE_CAPTURE)) {
av_log(s1, AV_LOG_ERROR, "Fatal: grab device does not handle capture\n");
goto fail;
}
desired_palette = -1;
if (st->codec.pix_fmt == PIX_FMT_YUV420P) {
desired_palette = VIDEO_PALETTE_YUV420P;
} else if (st->codec.pix_fmt == PIX_FMT_YUV422) {
desired_palette = VIDEO_PALETTE_YUV422;
} else if (st->codec.pix_fmt == PIX_FMT_BGR24) {
desired_palette = VIDEO_PALETTE_RGB24;
}
/* set tv standard */
if (ap->standard && !ioctl(video_fd, VIDIOCGTUNER, &tuner)) {
if (!strcasecmp(ap->standard, "pal"))
tuner.mode = VIDEO_MODE_PAL;
else if (!strcasecmp(ap->standard, "secam"))
tuner.mode = VIDEO_MODE_SECAM;
else
tuner.mode = VIDEO_MODE_NTSC;
ioctl(video_fd, VIDIOCSTUNER, &tuner);
}
/* unmute audio */
audio.audio = 0;
ioctl(video_fd, VIDIOCGAUDIO, &audio);
memcpy(&s->audio_saved, &audio, sizeof(audio));
audio.flags &= ~VIDEO_AUDIO_MUTE;
ioctl(video_fd, VIDIOCSAUDIO, &audio);
ret = ioctl(video_fd,VIDIOCGMBUF,&s->gb_buffers);
if (ret < 0) {
/* try to use read based access */
struct video_window win;
struct video_picture pict;
int val;
win.x = 0;
win.y = 0;
win.width = width;
win.height = height;
win.chromakey = -1;
win.flags = 0;
ioctl(video_fd, VIDIOCSWIN, &win);
ioctl(video_fd, VIDIOCGPICT, &pict);
#if 0
printf("v4l: colour=%d hue=%d brightness=%d constrast=%d whiteness=%d\n",
pict.colour,
pict.hue,
pict.brightness,
pict.contrast,
pict.whiteness);
#endif
/* try to choose a suitable video format */
pict.palette = desired_palette;
if (desired_palette == -1 || (ret = ioctl(video_fd, VIDIOCSPICT, &pict)) < 0) {
pict.palette=VIDEO_PALETTE_YUV420P;
ret = ioctl(video_fd, VIDIOCSPICT, &pict);
if (ret < 0) {
pict.palette=VIDEO_PALETTE_YUV422;
ret = ioctl(video_fd, VIDIOCSPICT, &pict);
if (ret < 0) {
pict.palette=VIDEO_PALETTE_RGB24;
ret = ioctl(video_fd, VIDIOCSPICT, &pict);
if (ret < 0)
goto fail1;
}
}
}
s->frame_format = pict.palette;
val = 1;
ioctl(video_fd, VIDIOCCAPTURE, &val);
s->time_frame = av_gettime() * s->frame_rate / s->frame_rate_base;
s->use_mmap = 0;
/* ATI All In Wonder automatic activation */
if (!strcmp(s->video_cap.name, "Km")) {
if (aiw_init(s) < 0)
goto fail;
s->aiw_enabled = 1;
/* force 420P format because convertion from YUV422 to YUV420P
is done in this driver (ugly) */
s->frame_format = VIDEO_PALETTE_YUV420P;
}
} else {
s->video_buf = mmap(0,s->gb_buffers.size,PROT_READ|PROT_WRITE,MAP_SHARED,video_fd,0);
if ((unsigned char*)-1 == s->video_buf) {
perror("mmap");
goto fail;
}
s->gb_frame = 0;
s->time_frame = av_gettime() * s->frame_rate / s->frame_rate_base;
/* start to grab the first frame */
s->gb_buf.frame = s->gb_frame % s->gb_buffers.frames;
s->gb_buf.height = height;
s->gb_buf.width = width;
s->gb_buf.format = desired_palette;
if (desired_palette == -1 || (ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf)) < 0) {
s->gb_buf.format = VIDEO_PALETTE_YUV420P;
ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
if (ret < 0 && errno != EAGAIN) {
/* try YUV422 */
s->gb_buf.format = VIDEO_PALETTE_YUV422;
ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
if (ret < 0 && errno != EAGAIN) {
/* try RGB24 */
s->gb_buf.format = VIDEO_PALETTE_RGB24;
ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
}
}
}
if (ret < 0) {
if (errno != EAGAIN) {
fail1:
av_log(s1, AV_LOG_ERROR, "Fatal: grab device does not support suitable format\n");
} else {
av_log(s1, AV_LOG_ERROR,"Fatal: grab device does not receive any video signal\n");
}
goto fail;
}
for (j = 1; j < s->gb_buffers.frames; j++) {
s->gb_buf.frame = j;
ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
}
s->frame_format = s->gb_buf.format;
s->use_mmap = 1;
}
switch(s->frame_format) {
case VIDEO_PALETTE_YUV420P:
frame_size = (width * height * 3) / 2;
st->codec.pix_fmt = PIX_FMT_YUV420P;
break;
case VIDEO_PALETTE_YUV422:
frame_size = width * height * 2;
st->codec.pix_fmt = PIX_FMT_YUV422;
break;
case VIDEO_PALETTE_RGB24:
frame_size = width * height * 3;
st->codec.pix_fmt = PIX_FMT_BGR24; /* NOTE: v4l uses BGR24, not RGB24 ! */
break;
default:
goto fail;
}
s->fd = video_fd;
s->frame_size = frame_size;
st->codec.codec_type = CODEC_TYPE_VIDEO;
st->codec.codec_id = CODEC_ID_RAWVIDEO;
st->codec.width = width;
st->codec.height = height;
st->codec.frame_rate = frame_rate;
st->codec.frame_rate_base = frame_rate_base;
return 0;
fail:
if (video_fd >= 0)
close(video_fd);
av_free(st);
return AVERROR_IO;
}
static int v4l_mm_read_picture(VideoData *s, uint8_t *buf)
{
uint8_t *ptr;
while (ioctl(s->fd, VIDIOCSYNC, &s->gb_frame) < 0 &&
(errno == EAGAIN || errno == EINTR));
ptr = s->video_buf + s->gb_buffers.offsets[s->gb_frame];
memcpy(buf, ptr, s->frame_size);
/* Setup to capture the next frame */
s->gb_buf.frame = s->gb_frame;
if (ioctl(s->fd, VIDIOCMCAPTURE, &s->gb_buf) < 0) {
if (errno == EAGAIN)
av_log(NULL, AV_LOG_ERROR, "Cannot Sync\n");
else
perror("VIDIOCMCAPTURE");
return AVERROR_IO;
}
/* This is now the grabbing frame */
s->gb_frame = (s->gb_frame + 1) % s->gb_buffers.frames;
return s->frame_size;
}
static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
{
VideoData *s = s1->priv_data;
int64_t curtime, delay;
struct timespec ts;
/* Calculate the time of the next frame */
s->time_frame += int64_t_C(1000000);
/* wait based on the frame rate */
for(;;) {
curtime = av_gettime();
delay = s->time_frame * s->frame_rate_base / s->frame_rate - curtime;
if (delay <= 0) {
if (delay < int64_t_C(-1000000) * s->frame_rate_base / s->frame_rate) {
/* printf("grabbing is %d frames late (dropping)\n", (int) -(delay / 16666)); */
s->time_frame += int64_t_C(1000000);
}
break;
}
ts.tv_sec = delay / 1000000;
ts.tv_nsec = (delay % 1000000) * 1000;
nanosleep(&ts, NULL);
}
if (av_new_packet(pkt, s->frame_size) < 0)
return AVERROR_IO;
pkt->pts = curtime & ((1LL << 48) - 1);
/* read one frame */
if (s->aiw_enabled) {
return aiw_read_picture(s, pkt->data);
} else if (s->use_mmap) {
return v4l_mm_read_picture(s, pkt->data);
} else {
if (read(s->fd, pkt->data, pkt->size) != pkt->size)
return AVERROR_IO;
return s->frame_size;
}
}
static int grab_read_close(AVFormatContext *s1)
{
VideoData *s = s1->priv_data;
if (s->aiw_enabled)
aiw_close(s);
if (s->use_mmap)
munmap(s->video_buf, s->gb_buffers.size);
/* mute audio. we must force it because the BTTV driver does not
return its state correctly */
s->audio_saved.flags |= VIDEO_AUDIO_MUTE;
ioctl(s->fd, VIDIOCSAUDIO, &s->audio_saved);
close(s->fd);
return 0;
}
static AVInputFormat video_grab_device_format = {
"video4linux",
"video grab",
sizeof(VideoData),
NULL,
grab_read_header,
grab_read_packet,
grab_read_close,
.flags = AVFMT_NOFILE,
};
/* All in Wonder specific stuff */
/* XXX: remove and merge in libavcodec/imgconvert.c */
static int aiw_init(VideoData *s)
{
int width, height;
width = s->width;
height = s->height;
if ((width == s->video_cap.maxwidth && height == s->video_cap.maxheight) ||
(width == s->video_cap.maxwidth && height == s->video_cap.maxheight*2) ||
(width == s->video_cap.maxwidth/2 && height == s->video_cap.maxheight)) {
s->deint=0;
s->halfw=0;
if (height == s->video_cap.maxheight*2) s->deint=1;
if (width == s->video_cap.maxwidth/2) s->halfw=1;
} else {
av_log(NULL, AV_LOG_ERROR, "\nIncorrect Grab Size Supplied - Supported Sizes Are:\n");
av_log(NULL, AV_LOG_ERROR, " %dx%d %dx%d %dx%d\n\n",
s->video_cap.maxwidth,s->video_cap.maxheight,
s->video_cap.maxwidth,s->video_cap.maxheight*2,
s->video_cap.maxwidth/2,s->video_cap.maxheight);
goto fail;
}
if (s->halfw == 0) {
s->src_mem = av_malloc(s->width*2);
} else {
s->src_mem = av_malloc(s->width*4);
}
if (!s->src_mem) goto fail;
s->lum_m4_mem = av_malloc(s->width);
if (!s->lum_m4_mem)
goto fail;
return 0;
fail:
av_freep(&s->src_mem);
av_freep(&s->lum_m4_mem);
return -1;
}
#ifdef HAVE_MMX
#include "../libavcodec/i386/mmx.h"
#define LINE_WITH_UV \
movq_m2r(ptr[0],mm0); \
movq_m2r(ptr[8],mm1); \
movq_r2r(mm0, mm4); \
punpcklbw_r2r(mm1,mm0); \
punpckhbw_r2r(mm1,mm4); \
movq_r2r(mm0,mm5); \
punpcklbw_r2r(mm4,mm0); \
punpckhbw_r2r(mm4,mm5); \
movq_r2r(mm0,mm1); \
punpcklbw_r2r(mm5,mm1); \
movq_r2m(mm1,lum[0]); \
movq_m2r(ptr[16],mm2); \
movq_m2r(ptr[24],mm1); \
movq_r2r(mm2,mm4); \
punpcklbw_r2r(mm1,mm2); \
punpckhbw_r2r(mm1,mm4); \
movq_r2r(mm2,mm3); \
punpcklbw_r2r(mm4,mm2); \
punpckhbw_r2r(mm4,mm3); \
movq_r2r(mm2,mm1); \
punpcklbw_r2r(mm3,mm1); \
movq_r2m(mm1,lum[8]); \
punpckhdq_r2r(mm2,mm0); \
punpckhdq_r2r(mm3,mm5); \
movq_r2m(mm0,cb[0]); \
movq_r2m(mm5,cr[0]);
#define LINE_NO_UV \
movq_m2r(ptr[0],mm0);\
movq_m2r(ptr[8],mm1);\
movq_r2r(mm0, mm4);\
punpcklbw_r2r(mm1,mm0); \
punpckhbw_r2r(mm1,mm4);\
movq_r2r(mm0,mm5);\
punpcklbw_r2r(mm4,mm0);\
punpckhbw_r2r(mm4,mm5);\
movq_r2r(mm0,mm1);\
punpcklbw_r2r(mm5,mm1);\
movq_r2m(mm1,lum[0]);\
movq_m2r(ptr[16],mm2);\
movq_m2r(ptr[24],mm1);\
movq_r2r(mm2,mm4);\
punpcklbw_r2r(mm1,mm2);\
punpckhbw_r2r(mm1,mm4);\
movq_r2r(mm2,mm3);\
punpcklbw_r2r(mm4,mm2);\
punpckhbw_r2r(mm4,mm3);\
movq_r2r(mm2,mm1);\
punpcklbw_r2r(mm3,mm1);\
movq_r2m(mm1,lum[8]);
#define LINE_WITHUV_AVG \
movq_m2r(ptr[0], mm0);\
movq_m2r(ptr[8], mm1);\
movq_r2r(mm0, mm4);\
punpcklbw_r2r(mm1,mm0);\
punpckhbw_r2r(mm1,mm4);\
movq_r2r(mm0,mm5);\
punpcklbw_r2r(mm4,mm0);\
punpckhbw_r2r(mm4,mm5);\
movq_r2r(mm0,mm1);\
movq_r2r(mm5,mm2);\
punpcklbw_r2r(mm7,mm1);\
punpcklbw_r2r(mm7,mm2);\
paddw_r2r(mm6,mm1);\
paddw_r2r(mm2,mm1);\
psraw_i2r(1,mm1);\
packuswb_r2r(mm7,mm1);\
movd_r2m(mm1,lum[0]);\
movq_m2r(ptr[16],mm2);\
movq_m2r(ptr[24],mm1);\
movq_r2r(mm2,mm4);\
punpcklbw_r2r(mm1,mm2);\
punpckhbw_r2r(mm1,mm4);\
movq_r2r(mm2,mm3);\
punpcklbw_r2r(mm4,mm2);\
punpckhbw_r2r(mm4,mm3);\
movq_r2r(mm2,mm1);\
movq_r2r(mm3,mm4);\
punpcklbw_r2r(mm7,mm1);\
punpcklbw_r2r(mm7,mm4);\
paddw_r2r(mm6,mm1);\
paddw_r2r(mm4,mm1);\
psraw_i2r(1,mm1);\
packuswb_r2r(mm7,mm1);\
movd_r2m(mm1,lum[4]);\
punpckhbw_r2r(mm7,mm0);\
punpckhbw_r2r(mm7,mm2);\
paddw_r2r(mm6,mm0);\
paddw_r2r(mm2,mm0);\
psraw_i2r(1,mm0);\
packuswb_r2r(mm7,mm0);\
punpckhbw_r2r(mm7,mm5);\
punpckhbw_r2r(mm7,mm3);\
paddw_r2r(mm6,mm5);\
paddw_r2r(mm3,mm5);\
psraw_i2r(1,mm5);\
packuswb_r2r(mm7,mm5);\
movd_r2m(mm0,cb[0]);\
movd_r2m(mm5,cr[0]);
#define LINE_NOUV_AVG \
movq_m2r(ptr[0],mm0);\
movq_m2r(ptr[8],mm1);\
pand_r2r(mm5,mm0);\
pand_r2r(mm5,mm1);\
pmaddwd_r2r(mm6,mm0);\
pmaddwd_r2r(mm6,mm1);\
packssdw_r2r(mm1,mm0);\
paddw_r2r(mm6,mm0);\
psraw_i2r(1,mm0);\
movq_m2r(ptr[16],mm2);\
movq_m2r(ptr[24],mm3);\
pand_r2r(mm5,mm2);\
pand_r2r(mm5,mm3);\
pmaddwd_r2r(mm6,mm2);\
pmaddwd_r2r(mm6,mm3);\
packssdw_r2r(mm3,mm2);\
paddw_r2r(mm6,mm2);\
psraw_i2r(1,mm2);\
packuswb_r2r(mm2,mm0);\
movq_r2m(mm0,lum[0]);
#define DEINT_LINE_LUM(ptroff) \
movd_m2r(lum_m4[(ptroff)],mm0);\
movd_m2r(lum_m3[(ptroff)],mm1);\
movd_m2r(lum_m2[(ptroff)],mm2);\
movd_m2r(lum_m1[(ptroff)],mm3);\
movd_m2r(lum[(ptroff)],mm4);\
punpcklbw_r2r(mm7,mm0);\
movd_r2m(mm2,lum_m4[(ptroff)]);\
punpcklbw_r2r(mm7,mm1);\
punpcklbw_r2r(mm7,mm2);\
punpcklbw_r2r(mm7,mm3);\
punpcklbw_r2r(mm7,mm4);\
psllw_i2r(2,mm1);\
psllw_i2r(1,mm2);\
paddw_r2r(mm6,mm1);\
psllw_i2r(2,mm3);\
paddw_r2r(mm2,mm1);\
paddw_r2r(mm4,mm0);\
paddw_r2r(mm3,mm1);\
psubusw_r2r(mm0,mm1);\
psrlw_i2r(3,mm1);\
packuswb_r2r(mm7,mm1);\
movd_r2m(mm1,lum_m2[(ptroff)]);
#else
#include "../libavcodec/dsputil.h"
#define LINE_WITH_UV \
lum[0]=ptr[0];lum[1]=ptr[2];lum[2]=ptr[4];lum[3]=ptr[6];\
cb[0]=ptr[1];cb[1]=ptr[5];\
cr[0]=ptr[3];cr[1]=ptr[7];\
lum[4]=ptr[8];lum[5]=ptr[10];lum[6]=ptr[12];lum[7]=ptr[14];\
cb[2]=ptr[9];cb[3]=ptr[13];\
cr[2]=ptr[11];cr[3]=ptr[15];\
lum[8]=ptr[16];lum[9]=ptr[18];lum[10]=ptr[20];lum[11]=ptr[22];\
cb[4]=ptr[17];cb[5]=ptr[21];\
cr[4]=ptr[19];cr[5]=ptr[23];\
lum[12]=ptr[24];lum[13]=ptr[26];lum[14]=ptr[28];lum[15]=ptr[30];\
cb[6]=ptr[25];cb[7]=ptr[29];\
cr[6]=ptr[27];cr[7]=ptr[31];
#define LINE_NO_UV \
lum[0]=ptr[0];lum[1]=ptr[2];lum[2]=ptr[4];lum[3]=ptr[6];\
lum[4]=ptr[8];lum[5]=ptr[10];lum[6]=ptr[12];lum[7]=ptr[14];\
lum[8]=ptr[16];lum[9]=ptr[18];lum[10]=ptr[20];lum[11]=ptr[22];\
lum[12]=ptr[24];lum[13]=ptr[26];lum[14]=ptr[28];lum[15]=ptr[30];
#define LINE_WITHUV_AVG \
sum=(ptr[0]+ptr[2]+1) >> 1;lum[0]=sum; \
sum=(ptr[4]+ptr[6]+1) >> 1;lum[1]=sum; \
sum=(ptr[1]+ptr[5]+1) >> 1;cb[0]=sum; \
sum=(ptr[3]+ptr[7]+1) >> 1;cr[0]=sum; \
sum=(ptr[8]+ptr[10]+1) >> 1;lum[2]=sum; \
sum=(ptr[12]+ptr[14]+1) >> 1;lum[3]=sum; \
sum=(ptr[9]+ptr[13]+1) >> 1;cb[1]=sum; \
sum=(ptr[11]+ptr[15]+1) >> 1;cr[1]=sum; \
sum=(ptr[16]+ptr[18]+1) >> 1;lum[4]=sum; \
sum=(ptr[20]+ptr[22]+1) >> 1;lum[5]=sum; \
sum=(ptr[17]+ptr[21]+1) >> 1;cb[2]=sum; \
sum=(ptr[19]+ptr[23]+1) >> 1;cr[2]=sum; \
sum=(ptr[24]+ptr[26]+1) >> 1;lum[6]=sum; \
sum=(ptr[28]+ptr[30]+1) >> 1;lum[7]=sum; \
sum=(ptr[25]+ptr[29]+1) >> 1;cb[3]=sum; \
sum=(ptr[27]+ptr[31]+1) >> 1;cr[3]=sum;
#define LINE_NOUV_AVG \
sum=(ptr[0]+ptr[2]+1) >> 1;lum[0]=sum; \
sum=(ptr[4]+ptr[6]+1) >> 1;lum[1]=sum; \
sum=(ptr[8]+ptr[10]+1) >> 1;lum[2]=sum; \
sum=(ptr[12]+ptr[14]+1) >> 1;lum[3]=sum; \
sum=(ptr[16]+ptr[18]+1) >> 1;lum[4]=sum; \
sum=(ptr[20]+ptr[22]+1) >> 1;lum[5]=sum; \
sum=(ptr[24]+ptr[26]+1) >> 1;lum[6]=sum; \
sum=(ptr[28]+ptr[30]+1) >> 1;lum[7]=sum;
#define DEINT_LINE_LUM(ptroff) \
sum=(-lum_m4[(ptroff)]+(lum_m3[(ptroff)]<<2)+(lum_m2[(ptroff)]<<1)+(lum_m1[(ptroff)]<<2)-lum[(ptroff)]); \
lum_m4[(ptroff)]=lum_m2[(ptroff)];\
lum_m2[(ptroff)]=cm[(sum+4)>>3];\
sum=(-lum_m4[(ptroff)+1]+(lum_m3[(ptroff)+1]<<2)+(lum_m2[(ptroff)+1]<<1)+(lum_m1[(ptroff)+1]<<2)-lum[(ptroff)+1]); \
lum_m4[(ptroff)+1]=lum_m2[(ptroff)+1];\
lum_m2[(ptroff)+1]=cm[(sum+4)>>3];\
sum=(-lum_m4[(ptroff)+2]+(lum_m3[(ptroff)+2]<<2)+(lum_m2[(ptroff)+2]<<1)+(lum_m1[(ptroff)+2]<<2)-lum[(ptroff)+2]); \
lum_m4[(ptroff)+2]=lum_m2[(ptroff)+2];\
lum_m2[(ptroff)+2]=cm[(sum+4)>>3];\
sum=(-lum_m4[(ptroff)+3]+(lum_m3[(ptroff)+3]<<2)+(lum_m2[(ptroff)+3]<<1)+(lum_m1[(ptroff)+3]<<2)-lum[(ptroff)+3]); \
lum_m4[(ptroff)+3]=lum_m2[(ptroff)+3];\
lum_m2[(ptroff)+3]=cm[(sum+4)>>3];
#endif
/* Read two fields separately. */
static int aiw_read_picture(VideoData *s, uint8_t *data)
{
uint8_t *ptr, *lum, *cb, *cr;
int h;
#ifndef HAVE_MMX
int sum;
#endif
uint8_t* src = s->src_mem;
uint8_t *ptrend = &src[s->width*2];
lum=data;
cb=&lum[s->width*s->height];
cr=&cb[(s->width*s->height)/4];
if (s->deint == 0 && s->halfw == 0) {
while (read(s->fd,src,s->width*2) < 0) {
usleep(100);
}
for (h = 0; h < s->height-2; h+=2) {
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
LINE_WITH_UV
}
read(s->fd,src,s->width*2);
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {
LINE_NO_UV
}
read(s->fd,src,s->width*2);
}
/*
* Do last two lines
*/
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
LINE_WITH_UV
}
read(s->fd,src,s->width*2);
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {
LINE_NO_UV
}
/* drop second field */
while (read(s->fd,src,s->width*2) < 0) {
usleep(100);
}
for (h = 0; h < s->height - 1; h++) {
read(s->fd,src,s->width*2);
}
} else if (s->halfw == 1) {
#ifdef HAVE_MMX
mmx_t rounder;
mmx_t masker;
rounder.uw[0]=1;
rounder.uw[1]=1;
rounder.uw[2]=1;
rounder.uw[3]=1;
masker.ub[0]=0xff;
masker.ub[1]=0;
masker.ub[2]=0xff;
masker.ub[3]=0;
masker.ub[4]=0xff;
masker.ub[5]=0;
masker.ub[6]=0xff;
masker.ub[7]=0;
pxor_r2r(mm7,mm7);
movq_m2r(rounder,mm6);
#endif
while (read(s->fd,src,s->width*4) < 0) {
usleep(100);
}
ptrend = &src[s->width*4];
for (h = 0; h < s->height-2; h+=2) {
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8, cb+=4, cr+=4) {
LINE_WITHUV_AVG
}
read(s->fd,src,s->width*4);
#ifdef HAVE_MMX
movq_m2r(masker,mm5);
#endif
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8) {
LINE_NOUV_AVG
}
read(s->fd,src,s->width*4);
}
/*
* Do last two lines
*/
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8, cb+=4, cr+=4) {
LINE_WITHUV_AVG
}
read(s->fd,src,s->width*4);
#ifdef HAVE_MMX
movq_m2r(masker,mm5);
#endif
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8) {
LINE_NOUV_AVG
}
/* drop second field */
while (read(s->fd,src,s->width*4) < 0) {
usleep(100);
}
for (h = 0; h < s->height - 1; h++) {
read(s->fd,src,s->width*4);
}
} else {
uint8_t *lum_m1, *lum_m2, *lum_m3, *lum_m4;
#ifdef HAVE_MMX
mmx_t rounder;
rounder.uw[0]=4;
rounder.uw[1]=4;
rounder.uw[2]=4;
rounder.uw[3]=4;
movq_m2r(rounder,mm6);
pxor_r2r(mm7,mm7);
#else
uint8_t *cm = cropTbl + MAX_NEG_CROP;
#endif
/* read two fields and deinterlace them */
while (read(s->fd,src,s->width*2) < 0) {
usleep(100);
}
for (h = 0; h < (s->height/2)-2; h+=2) {
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
LINE_WITH_UV
}
read(s->fd,src,s->width*2);
/* skip a luminance line - will be filled in later */
lum += s->width;
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
LINE_WITH_UV
}
/* skip a luminance line - will be filled in later */
lum += s->width;
read(s->fd,src,s->width*2);
}
/*
* Do last two lines
*/
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
LINE_WITH_UV
}
/* skip a luminance line - will be filled in later */
lum += s->width;
read(s->fd,src,s->width*2);
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
LINE_WITH_UV
}
/*
*
* SECOND FIELD
*
*/
lum=&data[s->width];
while (read(s->fd,src,s->width*2) < 0) {
usleep(10);
}
/* First (and last) two lines not interlaced */
for (h = 0; h < 2; h++) {
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {
LINE_NO_UV
}
read(s->fd,src,s->width*2);
/* skip a luminance line */
lum += s->width;
}
lum_m1=&lum[-s->width];
lum_m2=&lum_m1[-s->width];
lum_m3=&lum_m2[-s->width];
memmove(s->lum_m4_mem,&lum_m3[-s->width],s->width);
for (; h < (s->height/2)-1; h++) {
lum_m4=s->lum_m4_mem;
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16,lum_m1+=16,lum_m2+=16,lum_m3+=16,lum_m4+=16) {
LINE_NO_UV
DEINT_LINE_LUM(0)
DEINT_LINE_LUM(4)
DEINT_LINE_LUM(8)
DEINT_LINE_LUM(12)
}
read(s->fd,src,s->width*2);
/* skip a luminance line */
lum += s->width;
lum_m1 += s->width;
lum_m2 += s->width;
lum_m3 += s->width;
// lum_m4 += s->width;
}
/*
* Do last line
*/
lum_m4=s->lum_m4_mem;
for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, lum_m1+=16, lum_m2+=16, lum_m3+=16, lum_m4+=16) {
LINE_NO_UV
DEINT_LINE_LUM(0)
DEINT_LINE_LUM(4)
DEINT_LINE_LUM(8)
DEINT_LINE_LUM(12)
}
}
#ifdef HAVE_MMX
emms();
#endif
return s->frame_size;
}
static int aiw_close(VideoData *s)
{
av_freep(&s->lum_m4_mem);
av_freep(&s->src_mem);
return 0;
}
int video_grab_init(void)
{
av_register_input_format(&video_grab_device_format);
return 0;
}
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