renamed libav to libavformat

Originally committed as revision 1276 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 829 insertions, 0 deletions

diff --git a/libavformat/grab.c b/libavformat/grab.c
new file mode 100644
index 0000000000..8173bac369
--- /dev/null
+++ b/libavformat/grab.c
@@ -0,0 +1,829 @@
+/*
+ * 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 <linux/videodev.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#include <time.h>
+
+typedef struct {
+    int fd;
+    int frame_format; /* see VIDEO_PALETTE_xxx */
+    int use_mmap;
+    int width, height;
+    int frame_rate;
+    INT64 time_frame;
+    int frame_size;
+    struct video_capability video_cap;
+    struct video_audio audio_saved;
+    UINT8 *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 *src_mem;
+    UINT8 *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);
+
+const char *v4l_device = "/dev/video";
+
+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;
+    int desired_palette;
+    struct video_audio audio;
+
+    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;
+
+    st = av_new_stream(s1, 0);
+    if (!st)
+        return -ENOMEM;
+
+    s->width = width;
+    s->height = height;
+    s->frame_rate = frame_rate;
+
+    video_fd = open(v4l_device, O_RDWR);
+    if (video_fd < 0) {
+        perror(v4l_device);
+        goto fail;
+    }
+    
+    if (ioctl(video_fd,VIDIOCGCAP, &s->video_cap) < 0) {
+        perror("VIDIOCGCAP");
+        goto fail;
+    }
+
+    if (!(s->video_cap.type & VID_TYPE_CAPTURE)) {
+        fprintf(stderr, "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;
+    }    
+    
+    /* 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->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();
+        
+        /* 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:
+                fprintf(stderr, "Fatal: grab device does not support suitable format\n");
+            } else {
+                fprintf(stderr,"Fatal: grab device does not receive any video signal\n");
+            }
+            goto fail;
+        }
+        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;
+    
+    av_set_pts_info(s1, 48, 1, 1000000); /* 48 bits pts in us */
+
+    return 0;
+ fail:
+    if (video_fd >= 0)
+        close(video_fd);
+    av_free(st);
+    return -EIO;
+}
+
+static int v4l_mm_read_picture(VideoData *s, UINT8 *buf)
+{
+    UINT8 *ptr;
+
+    /* Setup to capture the next frame */
+    s->gb_buf.frame = (s->gb_frame + 1) % s->gb_buffers.frames;
+    if (ioctl(s->fd, VIDIOCMCAPTURE, &s->gb_buf) < 0) {
+        if (errno == EAGAIN)
+            fprintf(stderr,"Cannot Sync\n");
+        else
+            perror("VIDIOCMCAPTURE");
+        return -EIO;
+    }
+
+    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);
+
+    /* This is now the grabbing frame */
+    s->gb_frame = s->gb_buf.frame;
+
+    return s->frame_size;
+}
+
+static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
+{
+    VideoData *s = s1->priv_data;
+    INT64 curtime, delay;
+    struct timespec ts;
+    INT64 per_frame = (INT64_C(1000000) * FRAME_RATE_BASE) / s->frame_rate;
+
+    /* Calculate the time of the next frame */
+    s->time_frame += per_frame;
+
+    /* wait based on the frame rate */
+    for(;;) {
+        curtime = av_gettime();
+        delay = s->time_frame - curtime;
+        if (delay <= 0) {
+            if (delay < -per_frame) {
+                /* printf("grabbing is %d frames late (dropping)\n", (int) -(delay / 16666)); */
+                s->time_frame += per_frame;
+            }
+            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 -EIO;
+
+    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 -EIO;
+        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 = {
+    "video_grab_device",
+    "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 {
+        fprintf(stderr,"\nIncorrect Grab Size Supplied - Supported Sizes Are:\n");
+        fprintf(stderr," %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 *ptr, *lum, *cb, *cr;
+    int h;
+#ifndef HAVE_MMX
+    int sum;
+#endif
+    UINT8* src = s->src_mem;
+    UINT8 *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 *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 *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;
+}