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v4l2: Keep decoder capture fps same as output fps if it's not set

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/1035>
This commit is contained in:
Hou Qi 2021-07-27 10:43:21 +08:00
parent 4a5197dc27
commit 6858c8222c
2 changed files with 32 additions and 0 deletions
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28
sys/v4l2/gstv4l2object.c
View file

@ -2219,6 +2219,26 @@ done:
return ret;
}
static gboolean
gst_v4l2_object_get_streamparm (GstV4l2Object * v4l2object, GstVideoInfo * info)
{
struct v4l2_streamparm streamparm;
memset (&streamparm, 0x00, sizeof (struct v4l2_streamparm));
streamparm.type = v4l2object->type;
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_PARM, &streamparm) < 0) {
GST_WARNING_OBJECT (v4l2object->dbg_obj, "VIDIOC_G_PARM failed");
return FALSE;
}
if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
|| v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
GST_VIDEO_INFO_FPS_N (info) =
streamparm.parm.capture.timeperframe.denominator;
GST_VIDEO_INFO_FPS_D (info) =
streamparm.parm.capture.timeperframe.numerator;
}
return TRUE;
}
static int
gst_v4l2_object_try_fmt (GstV4l2Object * v4l2object,
struct v4l2_format *try_fmt)
@ -4218,6 +4238,14 @@ gst_v4l2_object_acquire_format (GstV4l2Object * v4l2object, GstVideoInfo * info)
height);
gst_v4l2_object_get_colorspace (v4l2object, &fmt, &info->colorimetry);
gst_v4l2_object_get_streamparm (v4l2object, info);
if ((info->fps_n == 0) && (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
|| v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) {
info->fps_d = v4l2object->info.fps_d;
info->fps_n = v4l2object->info.fps_n;
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Set capture fps to %d/%d",
info->fps_n, info->fps_d);
}
gst_v4l2_object_save_format (v4l2object, fmtdesc, &fmt, info, &align);

4
sys/v4l2/gstv4l2videodec.c
View file

@ -690,6 +690,10 @@ gst_v4l2_video_dec_handle_frame (GstVideoDecoder * decoder,
gst_buffer_unref (codec_data);
/* init capture fps according to output */
self->v4l2capture->info.fps_d = self->v4l2output->info.fps_d;
self->v4l2capture->info.fps_n = self->v4l2output->info.fps_n;
/* For decoders G_FMT returns coded size, G_SELECTION returns visible size
* in the compose rectangle. gst_v4l2_object_acquire_format() checks both
* and returns the visible size as with/height and the coded size as