diff options
author | Michael Tretter <m.tretter@pengutronix.de> | 2020-12-03 12:00:53 +0100 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-01-27 16:05:03 +0100 |
commit | d2a1b58fd2df21d811872e4635087a91b6ba2d45 (patch) | |
tree | c517eb54a6779d9161131c0735440309bf65bae1 /drivers/media | |
parent | 8e64f00846bb19cb1910363c1acad64aa92020d4 (diff) | |
download | linux-d2a1b58fd2df21d811872e4635087a91b6ba2d45.tar.bz2 |
media: allegro: adjust channel after format change
A format change (i.e. the frame size or the codec) has multiple effects
on a channel:
- The available controls
- The limits of the available controls
- The default encoding options
To avoid scattering the changes all over the driver, add a new function
that goes over the channel and does all required adjustments.
Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media')
-rw-r--r-- | drivers/media/platform/allegro-dvt/allegro-core.c | 69 |
1 files changed, 52 insertions, 17 deletions
diff --git a/drivers/media/platform/allegro-dvt/allegro-core.c b/drivers/media/platform/allegro-dvt/allegro-core.c index 4d8e27464018..4be596d96d45 100644 --- a/drivers/media/platform/allegro-dvt/allegro-core.c +++ b/drivers/media/platform/allegro-dvt/allegro-core.c @@ -1963,7 +1963,6 @@ static int allegro_create_channel(struct allegro_channel *channel) { struct allegro_dev *dev = channel->dev; unsigned long timeout; - enum v4l2_mpeg_video_h264_level min_level; if (channel_exists(channel)) { v4l2_warn(&dev->v4l2_dev, @@ -1986,16 +1985,6 @@ static int allegro_create_channel(struct allegro_channel *channel) DIV_ROUND_UP(channel->framerate.numerator, channel->framerate.denominator)); - min_level = select_minimum_h264_level(channel->width, channel->height); - if (channel->level < min_level) { - v4l2_warn(&dev->v4l2_dev, - "user %d: selected Level %s too low: increasing to Level %s\n", - channel->user_id, - v4l2_ctrl_get_menu(V4L2_CID_MPEG_VIDEO_H264_LEVEL)[channel->level], - v4l2_ctrl_get_menu(V4L2_CID_MPEG_VIDEO_H264_LEVEL)[min_level]); - channel->level = min_level; - } - v4l2_ctrl_grab(channel->mpeg_video_h264_profile, true); v4l2_ctrl_grab(channel->mpeg_video_h264_level, true); v4l2_ctrl_grab(channel->mpeg_video_h264_i_frame_qp, true); @@ -2031,6 +2020,53 @@ err: return channel->error; } +/** + * allegro_channel_adjust() - Adjust channel parameters to current format + * @channel: the channel to adjust + * + * Various parameters of a channel and their limits depend on the currently + * set format. Adjust the parameters after a format change in one go. + */ +static void allegro_channel_adjust(struct allegro_channel *channel) +{ + struct allegro_dev *dev = channel->dev; + struct v4l2_ctrl *ctrl; + s64 min; + s64 max; + + channel->sizeimage_encoded = + estimate_stream_size(channel->width, channel->height); + + ctrl = channel->mpeg_video_h264_level; + min = select_minimum_h264_level(channel->width, channel->height); + if (ctrl->minimum > min) + v4l2_dbg(1, debug, &dev->v4l2_dev, + "%s.minimum: %lld -> %lld\n", + v4l2_ctrl_get_name(ctrl->id), ctrl->minimum, min); + v4l2_ctrl_lock(ctrl); + __v4l2_ctrl_modify_range(ctrl, min, ctrl->maximum, + ctrl->step, ctrl->default_value); + v4l2_ctrl_unlock(ctrl); + channel->level = v4l2_ctrl_g_ctrl(channel->mpeg_video_h264_level); + + ctrl = channel->mpeg_video_bitrate; + max = maximum_bitrate(v4l2_ctrl_g_ctrl(channel->mpeg_video_h264_level)); + if (ctrl->maximum < max) + v4l2_dbg(1, debug, &dev->v4l2_dev, + "%s: maximum: %lld -> %lld\n", + v4l2_ctrl_get_name(ctrl->id), ctrl->maximum, max); + v4l2_ctrl_lock(ctrl); + __v4l2_ctrl_modify_range(ctrl, ctrl->minimum, max, + ctrl->step, ctrl->default_value); + v4l2_ctrl_unlock(ctrl); + + ctrl = channel->mpeg_video_bitrate_peak; + v4l2_ctrl_lock(ctrl); + __v4l2_ctrl_modify_range(ctrl, ctrl->minimum, max, + ctrl->step, ctrl->default_value); + v4l2_ctrl_unlock(ctrl); +} + static void allegro_set_default_params(struct allegro_channel *channel) { channel->width = ALLEGRO_WIDTH_DEFAULT; @@ -2050,8 +2086,6 @@ static void allegro_set_default_params(struct allegro_channel *channel) channel->profile = V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE; channel->level = select_minimum_h264_level(channel->width, channel->height); - channel->sizeimage_encoded = - estimate_stream_size(channel->width, channel->height); channel->bitrate = maximum_bitrate(channel->level); channel->bitrate_peak = maximum_bitrate(channel->level); @@ -2459,6 +2493,8 @@ static int allegro_open(struct file *file) file->private_data = &channel->fh; v4l2_fh_add(&channel->fh); + allegro_channel_adjust(channel); + return 0; error: @@ -2577,6 +2613,8 @@ static int allegro_s_fmt_vid_cap(struct file *file, void *fh, channel->codec = f->fmt.pix.pixelformat; + allegro_channel_adjust(channel); + return 0; } @@ -2647,10 +2685,7 @@ static int allegro_s_fmt_vid_out(struct file *file, void *fh, channel->quantization = f->fmt.pix.quantization; channel->xfer_func = f->fmt.pix.xfer_func; - channel->level = - select_minimum_h264_level(channel->width, channel->height); - channel->sizeimage_encoded = - estimate_stream_size(channel->width, channel->height); + allegro_channel_adjust(channel); return 0; } |