* Linux video grab interface
* Copyright (c) 2000,2001 Fabrice Bellard.
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg 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
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#include <unistd.h>
int width, height;
int video_fd, frame_size;
int ret, frame_rate, frame_rate_base;
- int desired_palette;
+ int desired_palette, desired_depth;
struct video_tuner tuner;
struct video_audio audio;
- const char *video_device;
+ struct video_picture pict;
int j;
- if (!ap || ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0)
+ if (ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0) {
+ av_log(s1, AV_LOG_ERROR, "Bad capture size (%dx%d) or wrong time base (%d)\n",
+ ap->width, ap->height, ap->time_base.den);
+
return -1;
+ }
width = ap->width;
height = ap->height;
frame_rate = ap->time_base.den;
frame_rate_base = ap->time_base.num;
- if((unsigned)width > 32767 || (unsigned)height > 32767)
+ if((unsigned)width > 32767 || (unsigned)height > 32767) {
+ av_log(s1, AV_LOG_ERROR, "Capture size is out of range: %dx%d\n",
+ width, height);
+
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 */
+ return AVERROR(ENOMEM);
+ av_set_pts_info(st, 64, 1, 1000000); /* 64 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);
+ video_fd = open(s1->filename, O_RDWR);
if (video_fd < 0) {
- perror(video_device);
+ perror(s1->filename);
goto fail;
}
}
desired_palette = -1;
- if (st->codec->pix_fmt == PIX_FMT_YUV420P) {
+ desired_depth = -1;
+ if (ap->pix_fmt == PIX_FMT_YUV420P) {
desired_palette = VIDEO_PALETTE_YUV420P;
- } else if (st->codec->pix_fmt == PIX_FMT_YUV422) {
+ desired_depth = 12;
+ } else if (ap->pix_fmt == PIX_FMT_YUYV422) {
desired_palette = VIDEO_PALETTE_YUV422;
- } else if (st->codec->pix_fmt == PIX_FMT_BGR24) {
+ desired_depth = 16;
+ } else if (ap->pix_fmt == PIX_FMT_BGR24) {
desired_palette = VIDEO_PALETTE_RGB24;
+ desired_depth = 24;
}
/* set tv standard */
audio.flags &= ~VIDEO_AUDIO_MUTE;
ioctl(video_fd, VIDIOCSAUDIO, &audio);
+ 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;
+ pict.depth= desired_depth;
+ if (desired_palette == -1 || (ret = ioctl(video_fd, VIDIOCSPICT, &pict)) < 0) {
+ pict.palette=VIDEO_PALETTE_YUV420P;
+ pict.depth=12;
+ ret = ioctl(video_fd, VIDIOCSPICT, &pict);
+ if (ret < 0) {
+ pict.palette=VIDEO_PALETTE_YUV422;
+ pict.depth=16;
+ ret = ioctl(video_fd, VIDIOCSPICT, &pict);
+ if (ret < 0) {
+ pict.palette=VIDEO_PALETTE_RGB24;
+ pict.depth=24;
+ ret = ioctl(video_fd, VIDIOCSPICT, &pict);
+ if (ret < 0) {
+ pict.palette=VIDEO_PALETTE_GREY;
+ pict.depth=8;
+ ret = ioctl(video_fd, VIDIOCSPICT, &pict);
+ if (ret < 0)
+ goto fail1;
+ }
+ }
+ }
+ }
+
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;
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;
} 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->video_buf = mmap(0,s->gb_buffers.size,PROT_READ|PROT_WRITE,MAP_PRIVATE,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;
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;
+ s->gb_buf.format = pict.palette;
- 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);
- }
- }
- }
+ ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
if (ret < 0) {
if (errno != EAGAIN) {
fail1:
break;
case VIDEO_PALETTE_YUV422:
frame_size = width * height * 2;
- st->codec->pix_fmt = PIX_FMT_YUV422;
+ st->codec->pix_fmt = PIX_FMT_YUYV422;
break;
case VIDEO_PALETTE_RGB24:
frame_size = width * height * 3;
st->codec->pix_fmt = PIX_FMT_BGR24; /* NOTE: v4l uses BGR24, not RGB24 ! */
break;
+ case VIDEO_PALETTE_GREY:
+ frame_size = width * height * 1;
+ st->codec->pix_fmt = PIX_FMT_GRAY8;
+ break;
default:
goto fail;
}
struct timespec ts;
/* Calculate the time of the next frame */
- s->time_frame += int64_t_C(1000000);
+ s->time_frame += INT64_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) {
+ if (delay < INT64_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);
+ s->time_frame += INT64_C(1000000);
}
break;
}
if (av_new_packet(pkt, s->frame_size) < 0)
return AVERROR_IO;
- pkt->pts = curtime & ((1LL << 48) - 1);
+ pkt->pts = curtime;
/* read one frame */
if (s->aiw_enabled) {
return 0;
}
-static AVInputFormat video_grab_device_format = {
+AVInputFormat video_grab_v4l_demuxer = {
"video4linux",
"video grab",
sizeof(VideoData),
movq_m2r(rounder,mm6);
pxor_r2r(mm7,mm7);
#else
- uint8_t *cm = cropTbl + MAX_NEG_CROP;
+ uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
#endif
/* read two fields and deinterlace them */
av_freep(&s->src_mem);
return 0;
}
-
-int video_grab_init(void)
-{
- av_register_input_format(&video_grab_device_format);
- return 0;
-}
projects / ffmpeg / blobdiff