* V4L2_PIX_FMT_* and PIX_FMT_*
*
*
- * 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
+ * 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 <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/time.h>
-#define _LINUX_TIME_H 1
-#include <linux/videodev.h>
+#include <asm/types.h>
+#include <linux/videodev2.h>
#include <time.h>
static const int desired_video_buffers = 256;
unsigned int *buf_len;
};
+struct buff_data {
+ int index;
+ int fd;
+};
+
struct fmt_map {
enum PixelFormat ff_fmt;
int32_t v4l2_fmt;
.v4l2_fmt = V4L2_PIX_FMT_YUV422P,
},
{
- .ff_fmt = PIX_FMT_YUV422,
+ .ff_fmt = PIX_FMT_YUYV422,
.v4l2_fmt = V4L2_PIX_FMT_YUYV,
},
{
},
/*
{
- .ff_fmt = PIX_FMT_RGBA32,
+ .ff_fmt = PIX_FMT_RGB32,
.v4l2_fmt = V4L2_PIX_FMT_BGR32,
},
*/
},
};
-static int device_open(const char *devname, uint32_t *capabilities)
+static int device_open(AVFormatContext *ctx, uint32_t *capabilities)
{
struct v4l2_capability cap;
int fd;
int res;
+ int flags = O_RDWR;
- fd = open(devname, O_RDWR /*| O_NONBLOCK*/, 0);
+ if (ctx->flags & AVFMT_FLAG_NONBLOCK) {
+ flags |= O_NONBLOCK;
+ }
+ fd = open(ctx->filename, flags, 0);
if (fd < 0) {
- av_log(NULL, AV_LOG_ERROR, "Cannot open video device %s : %s\n",
- devname, strerror(errno));
+ av_log(ctx, AV_LOG_ERROR, "Cannot open video device %s : %s\n",
+ ctx->filename, strerror(errno));
return -1;
}
// ENOIOCTLCMD definition only availble on __KERNEL__
if (res < 0 && errno == 515)
{
- av_log(NULL, AV_LOG_ERROR, "QUERYCAP not implemented, probably V4L device but not supporting V4L2\n");
+ av_log(ctx, AV_LOG_ERROR, "QUERYCAP not implemented, probably V4L device but not supporting V4L2\n");
close(fd);
return -1;
}
if (res < 0) {
- av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYCAP): %s\n",
+ av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYCAP): %s\n",
strerror(errno));
close(fd);
return -1;
}
if ((cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0) {
- av_log(NULL, AV_LOG_ERROR, "Not a video capture device\n");
+ av_log(ctx, AV_LOG_ERROR, "Not a video capture device\n");
close(fd);
return -1;
return fd;
}
-static int device_init(int fd, int *width, int *height, int pix_fmt)
+static int device_init(AVFormatContext *ctx, int *width, int *height, int pix_fmt)
{
+ struct video_data *s = ctx->priv_data;
+ int fd = s->fd;
struct v4l2_format fmt;
int res;
fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
res = ioctl(fd, VIDIOC_S_FMT, &fmt);
if ((*width != fmt.fmt.pix.width) || (*height != fmt.fmt.pix.height)) {
- av_log(NULL, AV_LOG_INFO, "The V4L2 driver changed the video from %dx%d to %dx%d\n", *width, *height, fmt.fmt.pix.width, fmt.fmt.pix.height);
+ av_log(ctx, AV_LOG_INFO, "The V4L2 driver changed the video from %dx%d to %dx%d\n", *width, *height, fmt.fmt.pix.width, fmt.fmt.pix.height);
*width = fmt.fmt.pix.width;
*height = fmt.fmt.pix.height;
}
return -1;
}
-static int mmap_init(struct video_data *s)
+static int mmap_init(AVFormatContext *ctx)
{
+ struct video_data *s = ctx->priv_data;
struct v4l2_requestbuffers req;
int i, res;
res = ioctl (s->fd, VIDIOC_REQBUFS, &req);
if (res < 0) {
if (errno == EINVAL) {
- av_log(NULL, AV_LOG_ERROR, "Device does not support mmap\n");
+ av_log(ctx, AV_LOG_ERROR, "Device does not support mmap\n");
} else {
- av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_REQBUFS)\n");
+ av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_REQBUFS)\n");
}
return -1;
}
if (req.count < 2) {
- av_log(NULL, AV_LOG_ERROR, "Insufficient buffer memory\n");
+ av_log(ctx, AV_LOG_ERROR, "Insufficient buffer memory\n");
return -1;
}
s->buffers = req.count;
s->buf_start = av_malloc(sizeof(void *) * s->buffers);
if (s->buf_start == NULL) {
- av_log(NULL, AV_LOG_ERROR, "Cannot allocate buffer pointers\n");
+ av_log(ctx, AV_LOG_ERROR, "Cannot allocate buffer pointers\n");
return -1;
}
s->buf_len = av_malloc(sizeof(unsigned int) * s->buffers);
if (s->buf_len == NULL) {
- av_log(NULL, AV_LOG_ERROR, "Cannot allocate buffer sizes\n");
+ av_log(ctx, AV_LOG_ERROR, "Cannot allocate buffer sizes\n");
av_free(s->buf_start);
return -1;
buf.index = i;
res = ioctl (s->fd, VIDIOC_QUERYBUF, &buf);
if (res < 0) {
- av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYBUF)\n");
+ av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYBUF)\n");
return -1;
}
s->buf_len[i] = buf.length;
if (s->buf_len[i] < s->frame_size) {
- av_log(NULL, AV_LOG_ERROR, "Buffer len [%d] = %d != %d\n", i, s->buf_len[i], s->frame_size);
+ av_log(ctx, AV_LOG_ERROR, "Buffer len [%d] = %d != %d\n", i, s->buf_len[i], s->frame_size);
return -1;
}
s->buf_start[i] = mmap (NULL, buf.length,
PROT_READ | PROT_WRITE, MAP_SHARED, s->fd, buf.m.offset);
if (s->buf_start[i] == MAP_FAILED) {
- av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
+ av_log(ctx, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
return -1;
}
return 0;
}
-static int read_init(struct video_data *s)
+static int read_init(AVFormatContext *ctx)
{
return -1;
}
-static int mmap_read_frame(struct video_data *s, void *frame, int64_t *ts)
+static void mmap_release_buffer(AVPacket *pkt)
+{
+ struct v4l2_buffer buf;
+ int res, fd;
+ struct buff_data *buf_descriptor = pkt->priv;
+
+ memset(&buf, 0, sizeof(struct v4l2_buffer));
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+ buf.index = buf_descriptor->index;
+ fd = buf_descriptor->fd;
+ av_free(buf_descriptor);
+
+ res = ioctl (fd, VIDIOC_QBUF, &buf);
+ if (res < 0) {
+ av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF)\n");
+ }
+ pkt->data = NULL;
+ pkt->size = 0;
+}
+
+static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
{
+ struct video_data *s = ctx->priv_data;
struct v4l2_buffer buf;
+ struct buff_data *buf_descriptor;
int res;
memset(&buf, 0, sizeof(struct v4l2_buffer));
buf.memory = V4L2_MEMORY_MMAP;
/* FIXME: Some special treatment might be needed in case of loss of signal... */
- while ((res = ioctl(s->fd, VIDIOC_DQBUF, &buf)) < 0 &&
- ((errno == EAGAIN) || (errno == EINTR)));
+ while ((res = ioctl(s->fd, VIDIOC_DQBUF, &buf)) < 0 && (errno == EINTR));
if (res < 0) {
- av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_DQBUF): %s\n", strerror(errno));
+ if (errno == EAGAIN) {
+ pkt->size = 0;
+
+ return AVERROR(EAGAIN);
+ }
+ av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_DQBUF): %s\n", strerror(errno));
return -1;
}
assert (buf.index < s->buffers);
- assert(buf.bytesused == s->frame_size);
- /* Image is at s->buff_start[buf.index] */
- memcpy(frame, s->buf_start[buf.index], buf.bytesused);
- *ts = buf.timestamp.tv_sec * int64_t_C(1000000) + buf.timestamp.tv_usec;
+ if (buf.bytesused != s->frame_size) {
+ av_log(ctx, AV_LOG_ERROR, "The v4l2 frame is %d bytes, but %d bytes are expected\n", buf.bytesused, s->frame_size);
- res = ioctl (s->fd, VIDIOC_QBUF, &buf);
- if (res < 0) {
- av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF)\n");
+ return -1;
+ }
+
+ /* Image is at s->buff_start[buf.index] */
+ pkt->data= s->buf_start[buf.index];
+ pkt->size = buf.bytesused;
+ pkt->pts = buf.timestamp.tv_sec * INT64_C(1000000) + buf.timestamp.tv_usec;
+ pkt->destruct = mmap_release_buffer;
+ buf_descriptor = av_malloc(sizeof(struct buff_data));
+ if (buf_descriptor == NULL) {
+ /* Something went wrong... Since av_malloc() failed, we cannot even
+ * allocate a buffer for memcopying into it
+ */
+ av_log(ctx, AV_LOG_ERROR, "Failed to allocate a buffer descriptor\n");
+ res = ioctl (s->fd, VIDIOC_QBUF, &buf);
return -1;
}
+ buf_descriptor->fd = s->fd;
+ buf_descriptor->index = buf.index;
+ pkt->priv = buf_descriptor;
return s->buf_len[buf.index];
}
-static int read_frame(struct video_data *s, void *frame, int64_t *ts)
+static int read_frame(AVFormatContext *ctx, AVPacket *pkt)
{
return -1;
}
-static int mmap_start(struct video_data *s)
+static int mmap_start(AVFormatContext *ctx)
{
+ struct video_data *s = ctx->priv_data;
enum v4l2_buf_type type;
int i, res;
res = ioctl (s->fd, VIDIOC_QBUF, &buf);
if (res < 0) {
- av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", strerror(errno));
+ av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", strerror(errno));
return -1;
}
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
res = ioctl (s->fd, VIDIOC_STREAMON, &type);
if (res < 0) {
- av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_STREAMON): %s\n", strerror(errno));
+ av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_STREAMON): %s\n", strerror(errno));
return -1;
}
av_free(s->buf_len);
}
+static int v4l2_set_parameters( AVFormatContext *s1, AVFormatParameters *ap )
+{
+ struct video_data *s = s1->priv_data;
+ struct v4l2_input input;
+ struct v4l2_standard standard;
+ int i;
+
+ if(ap->channel>=0) {
+ /* set tv video input */
+ memset (&input, 0, sizeof (input));
+ input.index = ap->channel;
+ if(ioctl (s->fd, VIDIOC_ENUMINPUT, &input) < 0) {
+ av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl enum input failed:\n");
+ return AVERROR(EIO);
+ }
+
+ av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set input_id: %d, input: %s\n",
+ ap->channel, input.name);
+ if(ioctl (s->fd, VIDIOC_S_INPUT, &input.index) < 0 ) {
+ av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl set input(%d) failed\n",
+ ap->channel);
+ return AVERROR(EIO);
+ }
+ }
+
+ if(ap->standard) {
+ av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set standard: %s\n",
+ ap->standard );
+ /* set tv standard */
+ memset (&standard, 0, sizeof (standard));
+ for(i=0;;i++) {
+ standard.index = i;
+ if (ioctl(s->fd, VIDIOC_ENUMSTD, &standard) < 0) {
+ av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl set standard(%s) failed\n",
+ ap->standard);
+ return AVERROR(EIO);
+ }
+
+ if(!strcasecmp(standard.name, ap->standard)) {
+ break;
+ }
+ }
+
+ av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set standard: %s, id: %"PRIu64"\n",
+ ap->standard, standard.id);
+ if (ioctl(s->fd, VIDIOC_S_STD, &standard.id) < 0) {
+ av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl set standard(%s) failed\n",
+ ap->standard);
+ return AVERROR(EIO);
+ }
+ }
+
+ return 0;
+}
+
static int v4l2_read_header(AVFormatContext *s1, AVFormatParameters *ap)
{
struct video_data *s = s1->priv_data;
int width, height;
int res, frame_rate, frame_rate_base;
uint32_t desired_format, capabilities;
- const char *video_device;
if (ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0) {
av_log(s1, AV_LOG_ERROR, "Missing/Wrong parameters\n");
st = av_new_stream(s1, 0);
if (!st) {
- return -ENOMEM;
+ return AVERROR(ENOMEM);
}
av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
s->frame_rate = frame_rate;
s->frame_rate_base = frame_rate_base;
- video_device = ap->device;
- if (!video_device) {
- video_device = "/dev/video";
- }
capabilities = 0;
- s->fd = device_open(video_device, &capabilities);
+ s->fd = device_open(s1, &capabilities);
if (s->fd < 0) {
av_free(st);
- return AVERROR_IO;
+ return AVERROR(EIO);
}
- av_log(s1, AV_LOG_ERROR, "[%d]Capabilities: %x\n", s->fd, capabilities);
+ av_log(s1, AV_LOG_INFO, "[%d]Capabilities: %x\n", s->fd, capabilities);
desired_format = fmt_ff2v4l(ap->pix_fmt);
- if (desired_format == 0 || (device_init(s->fd, &width, &height, desired_format) < 0)) {
+ if (desired_format == 0 || (device_init(s1, &width, &height, desired_format) < 0)) {
int i, done;
done = 0; i = 0;
while (!done) {
desired_format = fmt_conversion_table[i].v4l2_fmt;
- if (device_init(s->fd, &width, &height, desired_format) < 0) {
+ if (device_init(s1, &width, &height, desired_format) < 0) {
desired_format = 0;
i++;
} else {
close(s->fd);
av_free(st);
- return AVERROR_IO;
+ return AVERROR(EIO);
}
s->frame_format = desired_format;
+ if( v4l2_set_parameters( s1, ap ) < 0 )
+ return AVERROR(EIO);
+
st->codec->pix_fmt = fmt_v4l2ff(desired_format);
s->frame_size = avpicture_get_size(st->codec->pix_fmt, width, height);
if (capabilities & V4L2_CAP_STREAMING) {
s->io_method = io_mmap;
- res = mmap_init(s);
- res = mmap_start(s);
+ res = mmap_init(s1);
+ if (res == 0) {
+ res = mmap_start(s1);
+ }
} else {
s->io_method = io_read;
- res = read_init(s);
+ res = read_init(s1);
}
if (res < 0) {
close(s->fd);
av_free(st);
- return AVERROR_IO;
+ return AVERROR(EIO);
}
s->top_field_first = first_field(s->fd);
struct video_data *s = s1->priv_data;
int res;
- if (av_new_packet(pkt, s->frame_size) < 0)
- return AVERROR_IO;
-
if (s->io_method == io_mmap) {
- res = mmap_read_frame(s, pkt->data, &pkt->pts);
+ av_init_packet(pkt);
+ res = mmap_read_frame(s1, pkt);
} else if (s->io_method == io_read) {
- res = read_frame(s, pkt->data, &pkt->pts);
+ if (av_new_packet(pkt, s->frame_size) < 0)
+ return AVERROR(EIO);
+
+ res = read_frame(s1, pkt);
} else {
- return AVERROR_IO;
+ return AVERROR(EIO);
}
if (res < 0) {
- return AVERROR_IO;
+ return res;
}
if (s1->streams[0]->codec->coded_frame) {
return 0;
}
-static AVInputFormat v4l2_format = {
+AVInputFormat v4l2_demuxer = {
"video4linux2",
"video grab",
sizeof(struct video_data),
v4l2_read_close,
.flags = AVFMT_NOFILE,
};
-
-int v4l2_init(void)
-{
- av_register_input_format(&v4l2_format);
- return 0;
-}
projects / ffmpeg / blobdiff