/*
* Linux video grab interface
- * Copyright (c) 2000,2001 Fabrice Bellard.
+ * Copyright (c) 2000,2001 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#undef __STRICT_ANSI__ //workaround due to broken kernel headers
#include "config.h"
+#include "libavutil/rational.h"
#include "libavformat/avformat.h"
#include "libavcodec/dsputil.h"
#include <unistd.h>
int fd;
int frame_format; /* see VIDEO_PALETTE_xxx */
int use_mmap;
- int width, height;
- int frame_rate;
- int frame_rate_base;
+ AVRational time_base;
int64_t time_frame;
int frame_size;
struct video_capability video_cap;
struct video_audio audio_saved;
+ struct video_window video_win;
uint8_t *video_buf;
struct video_mbuf gb_buffers;
struct video_mmap gb_buf;
{
VideoData *s = s1->priv_data;
AVStream *st;
- int width, height;
- int video_fd, frame_size;
- int ret, frame_rate, frame_rate_base;
+ int video_fd;
int desired_palette, desired_depth;
struct video_tuner tuner;
struct video_audio audio;
struct video_picture pict;
int j;
- int vformat_num = sizeof(video_formats) / sizeof(video_formats[0]);
+ int vformat_num = FF_ARRAY_ELEMS(video_formats);
- if (ap->width <= 0 || ap->height <= 0) {
- av_log(s1, AV_LOG_ERROR, "Wrong size (%dx%d)\n", ap->width, ap->height);
- return -1;
- }
if (ap->time_base.den <= 0) {
av_log(s1, AV_LOG_ERROR, "Wrong time base (%d)\n", ap->time_base.den);
return -1;
}
+ s->time_base = ap->time_base;
- 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) {
- av_log(s1, AV_LOG_ERROR, "Capture size is out of range: %dx%d\n",
- width, height);
-
- return -1;
- }
+ s->video_win.width = ap->width;
+ s->video_win.height = ap->height;
st = av_new_stream(s1, 0);
if (!st)
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_fd = open(s1->filename, O_RDWR);
if (video_fd < 0) {
av_log(s1, AV_LOG_ERROR, "%s: %s\n", s1->filename, strerror(errno));
goto fail;
}
- if (ioctl(video_fd,VIDIOCGCAP, &s->video_cap) < 0) {
+ if (ioctl(video_fd, VIDIOCGCAP, &s->video_cap) < 0) {
av_log(s1, AV_LOG_ERROR, "VIDIOCGCAP: %s\n", strerror(errno));
goto fail;
}
goto fail;
}
+ /* no values set, autodetect them */
+ if (s->video_win.width <= 0 || s->video_win.height <= 0) {
+ if (ioctl(video_fd, VIDIOCGWIN, &s->video_win, sizeof(s->video_win)) < 0) {
+ av_log(s1, AV_LOG_ERROR, "VIDIOCGWIN: %s\n", strerror(errno));
+ goto fail;
+ }
+ }
+
+ if(avcodec_check_dimensions(s1, s->video_win.width, s->video_win.height) < 0)
+ return -1;
+
desired_palette = -1;
desired_depth = -1;
for (j = 0; j < vformat_num; j++) {
/* 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) {
+ if (desired_palette == -1 || ioctl(video_fd, VIDIOCSPICT, &pict) < 0) {
for (j = 0; j < vformat_num; j++) {
pict.palette = video_formats[j].palette;
pict.depth = video_formats[j].depth;
goto fail1;
}
- ret = ioctl(video_fd,VIDIOCGMBUF,&s->gb_buffers);
- if (ret < 0) {
+ if (ioctl(video_fd, VIDIOCGMBUF, &s->gb_buffers) < 0) {
/* try to use read based access */
- struct video_window win;
int val;
- win.x = 0;
- win.y = 0;
- win.width = width;
- win.height = height;
- win.chromakey = -1;
- win.flags = 0;
+ s->video_win.x = 0;
+ s->video_win.y = 0;
+ s->video_win.chromakey = -1;
+ s->video_win.flags = 0;
- ioctl(video_fd, VIDIOCSWIN, &win);
+ if (ioctl(video_fd, VIDIOCSWIN, s->video_win) < 0) {
+ av_log(s1, AV_LOG_ERROR, "VIDIOCSWIN: %s\n", strerror(errno));
+ goto fail;
+ }
s->frame_format = pict.palette;
val = 1;
- ioctl(video_fd, VIDIOCCAPTURE, &val);
+ if (ioctl(video_fd, VIDIOCCAPTURE, &val) < 0) {
+ av_log(s1, AV_LOG_ERROR, "VIDIOCCAPTURE: %s\n", strerror(errno));
+ goto fail;
+ }
- s->time_frame = av_gettime() * s->frame_rate / s->frame_rate_base;
+ s->time_frame = av_gettime() * s->time_base.den / s->time_base.num;
s->use_mmap = 0;
} else {
- s->video_buf = mmap(0,s->gb_buffers.size,PROT_READ|PROT_WRITE,MAP_SHARED,video_fd,0);
+ 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) {
- s->video_buf = mmap(0,s->gb_buffers.size,PROT_READ|PROT_WRITE,MAP_PRIVATE,video_fd,0);
+ 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) {
av_log(s1, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
goto fail;
}
}
s->gb_frame = 0;
- s->time_frame = av_gettime() * s->frame_rate / s->frame_rate_base;
+ s->time_frame = av_gettime() * s->time_base.den / s->time_base.num;
/* 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.height = s->video_win.height;
+ s->gb_buf.width = s->video_win.width;
s->gb_buf.format = pict.palette;
- ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
- if (ret < 0) {
+ if (ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf) < 0) {
if (errno != EAGAIN) {
fail1:
- av_log(s1, AV_LOG_ERROR, "Fatal: grab device does not support suitable format\n");
+ av_log(s1, AV_LOG_ERROR, "VIDIOCMCAPTURE: %s\n", strerror(errno));
} else {
- av_log(s1, AV_LOG_ERROR,"Fatal: grab device does not receive any video signal\n");
+ av_log(s1, AV_LOG_ERROR, "Fatal: grab device does not receive any video signal\n");
}
goto fail;
}
for (j = 0; j < vformat_num; j++) {
if (s->frame_format == video_formats[j].palette) {
- frame_size = width * height * video_formats[j].depth / 8;
+ s->frame_size = s->video_win.width * s->video_win.height * video_formats[j].depth / 8;
st->codec->pix_fmt = video_formats[j].pix_fmt;
break;
}
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->time_base.den = frame_rate;
- st->codec->time_base.num = frame_rate_base;
- st->codec->bit_rate = frame_size * 1/av_q2d(st->codec->time_base) * 8;
+ st->codec->width = s->video_win.width;
+ st->codec->height = s->video_win.height;
+ st->codec->time_base = s->time_base;
+ st->codec->bit_rate = s->frame_size * 1/av_q2d(st->codec->time_base) * 8;
return 0;
fail:
/* wait based on the frame rate */
for(;;) {
curtime = av_gettime();
- delay = s->time_frame * s->frame_rate_base / s->frame_rate - curtime;
+ delay = s->time_frame * s->time_base.num / s->time_base.den - curtime;
if (delay <= 0) {
- if (delay < INT64_C(-1000000) * s->frame_rate_base / s->frame_rate) {
+ if (delay < INT64_C(-1000000) * s->time_base.num / s->time_base.den) {
/* printf("grabbing is %d frames late (dropping)\n", (int) -(delay / 16666)); */
s->time_frame += INT64_C(1000000);
}
AVInputFormat v4l_demuxer = {
"video4linux",
- NULL_IF_CONFIG_SMALL("video grab"),
+ NULL_IF_CONFIG_SMALL("Video4Linux device grab"),
sizeof(VideoData),
NULL,
grab_read_header,
projects / frescor / ffmpeg.git / blobdiff