Add support for drivers that can change the capture size on VIDIOC_S_FMT
Originally committed as revision 5076 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -148,17 +148,25 @@ static int device_open(const char *devname, uint32_t *capabilities)
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return fd;
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}
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static int device_init(int fd, int width, int height, int pix_fmt)
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static int device_init(int fd, int *width, int *height, int pix_fmt)
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{
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struct v4l2_format fmt;
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int res;
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memset(&fmt, 0, sizeof(struct v4l2_format));
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fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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fmt.fmt.pix.width = width;
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fmt.fmt.pix.height = height;
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fmt.fmt.pix.width = *width;
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fmt.fmt.pix.height = *height;
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fmt.fmt.pix.pixelformat = pix_fmt;
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fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
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return ioctl (fd, VIDIOC_S_FMT, &fmt);
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res = ioctl(fd, VIDIOC_S_FMT, &fmt);
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if ((*width != fmt.fmt.pix.width) || (*height != fmt.fmt.pix.height)) {
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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);
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*width = fmt.fmt.pix.width;
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*height = fmt.fmt.pix.height;
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}
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return res;
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}
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static int first_field(int fd)
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@ -418,13 +426,13 @@ static int v4l2_read_header(AVFormatContext *s1, AVFormatParameters *ap)
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av_log(s1, AV_LOG_ERROR, "[%d]Capabilities: %x\n", s->fd, capabilities);
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desired_format = fmt_ff2v4l(ap->pix_fmt);
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if (desired_format == 0 || (device_init(s->fd, width, height, desired_format) < 0)) {
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if (desired_format == 0 || (device_init(s->fd, &width, &height, desired_format) < 0)) {
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int i, done;
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done = 0; i = 0;
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while (!done) {
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desired_format = fmt_conversion_table[i].v4l2_fmt;
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if (device_init(s->fd, width, height, desired_format) < 0) {
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if (device_init(s->fd, &width, &height, desired_format) < 0) {
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desired_format = 0;
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i++;
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} else {
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