24 #undef __STRICT_ANSI__ //workaround due to broken kernel headers
31 #include "libavcodec/dsputil.h"
34 #include <sys/ioctl.h>
37 #define _LINUX_TIME_H 1
38 #include <linux/videodev.h>
49 struct video_capability video_cap;
50 struct video_audio audio_saved;
51 struct video_window video_win;
53 struct video_mbuf gb_buffers;
54 struct video_mmap gb_buf;
80 int desired_palette, desired_depth;
81 struct video_tuner tuner;
82 struct video_audio audio;
83 struct video_picture pict;
87 av_log(s1,
AV_LOG_WARNING,
"V4L input device is deprecated and will be removed in the next release.");
89 if (ap->time_base.den <= 0) {
103 video_fd = open(s1->
filename, O_RDWR);
109 if (ioctl(video_fd, VIDIOCGCAP, &s->
video_cap) < 0) {
114 if (!(s->
video_cap.type & VID_TYPE_CAPTURE)) {
130 desired_palette = -1;
132 for (j = 0; j < vformat_num; j++) {
141 if (!ioctl(video_fd, VIDIOCGTUNER, &tuner)) {
143 ioctl(video_fd, VIDIOCSTUNER, &tuner);
148 ioctl(video_fd, VIDIOCGAUDIO, &audio);
150 audio.flags &= ~VIDEO_AUDIO_MUTE;
151 ioctl(video_fd, VIDIOCSAUDIO, &audio);
153 ioctl(video_fd, VIDIOCGPICT, &pict);
154 av_dlog(s1,
"v4l: colour=%d hue=%d brightness=%d constrast=%d whiteness=%d\n",
155 pict.colour, pict.hue, pict.brightness, pict.contrast, pict.whiteness);
157 pict.palette = desired_palette;
158 pict.depth= desired_depth;
159 if (desired_palette == -1 || ioctl(video_fd, VIDIOCSPICT, &pict) < 0) {
160 for (j = 0; j < vformat_num; j++) {
163 if (-1 != ioctl(video_fd, VIDIOCSPICT, &pict))
166 if (j >= vformat_num)
170 if (ioctl(video_fd, VIDIOCGMBUF, &s->
gb_buffers) < 0) {
179 if (ioctl(video_fd, VIDIOCSWIN, s->
video_win) < 0) {
187 if (ioctl(video_fd, VIDIOCCAPTURE, &val) < 0) {
196 if ((
unsigned char*)-1 == s->
video_buf) {
197 s->
video_buf = mmap(0, s->
gb_buffers.size, PROT_READ|PROT_WRITE, MAP_PRIVATE, video_fd, 0);
198 if ((
unsigned char*)-1 == s->
video_buf) {
210 s->
gb_buf.format = pict.palette;
212 if (ioctl(video_fd, VIDIOCMCAPTURE, &s->
gb_buf) < 0) {
213 if (errno != EAGAIN) {
223 ioctl(video_fd, VIDIOCMCAPTURE, &s->
gb_buf);
229 for (j = 0; j < vformat_num; j++) {
237 if (j >= vformat_num)
260 while (ioctl(s->
fd, VIDIOCSYNC, &s->
gb_frame) < 0 &&
261 (errno == EAGAIN || errno == EINTR));
268 if (ioctl(s->
fd, VIDIOCMCAPTURE, &s->
gb_buf) < 0) {
285 int64_t curtime, delay;
302 ts.tv_sec = delay / 1000000;
303 ts.tv_nsec = (delay % 1000000) * 1000;
304 nanosleep(&ts,
NULL);
339 {
"standard",
"", offsetof(
VideoData, standard),
AV_OPT_TYPE_INT, {.i64 = VIDEO_MODE_NTSC}, VIDEO_MODE_PAL, VIDEO_MODE_NTSC,
AV_OPT_FLAG_DECODING_PARAM,
"standard" },
355 .
name =
"video4linux,v4l",
362 .priv_class = &v4l_class,
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
const char const char void * val
#define AV_LOG_WARNING
Something somehow does not look correct.
#define LIBAVUTIL_VERSION_INT
struct video_capability video_cap
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
#define FF_ARRAY_ELEMS(a)
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
struct video_window video_win
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
static double av_q2d(AVRational a)
Convert rational to double.
static av_cold int read_close(AVFormatContext *ctx)
enum AVPixelFormat pix_fmt
Main libavdevice API header.
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
static const struct @115 video_formats[]
AVCodecContext * codec
Codec context associated with this stream.
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
static const AVClass v4l_class
int bit_rate
the average bitrate
char filename[1024]
input or output filename
int width
picture width / height.
static int v4l_mm_read_picture(VideoData *s, uint8_t *buf)
packed RGB 8:8:8, 24bpp, BGRBGR...
static int read_header(FFV1Context *f)
int64_t av_gettime(void)
Get the current time in microseconds.
#define av_dlog(pctx,...)
av_dlog macros
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
enum AVMediaType codec_type
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Describe the class of an AVClass context structure.
rational number numerator/denominator
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
static const AVOption options[]
#define AV_PIX_FMT_BGR565
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
static int grab_read_close(AVFormatContext *s1)
struct video_mbuf gb_buffers
static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
AVInputFormat ff_v4l_demuxer
void * priv_data
Format private data.
struct video_audio audio_saved
AVPixelFormat
Pixel format.
This structure stores compressed data.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...