Release 4.11 drivers/media/platform/vivid/vivid-kthread-cap.c

Directory: drivers/media/platform/vivid
/*
 * vivid-kthread-cap.h - video/vbi capture thread support functions.
 *
 * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/font.h>
#include <linux/mutex.h>
#include <linux/videodev2.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/random.h>
#include <linux/v4l2-dv-timings.h>
#include <asm/div64.h>
#include <media/videobuf2-vmalloc.h>
#include <media/v4l2-dv-timings.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
#include <media/v4l2-rect.h>

#include "vivid-core.h"
#include "vivid-vid-common.h"
#include "vivid-vid-cap.h"
#include "vivid-vid-out.h"
#include "vivid-radio-common.h"
#include "vivid-radio-rx.h"
#include "vivid-radio-tx.h"
#include "vivid-sdr-cap.h"
#include "vivid-vbi-cap.h"
#include "vivid-vbi-out.h"
#include "vivid-osd.h"
#include "vivid-ctrls.h"
#include "vivid-kthread-cap.h"



static inline v4l2_std_id vivid_get_std_cap(const struct vivid_dev *dev)
{
	if (vivid_is_sdtv_cap(dev))
		return dev->std_cap;
	return 0;
}

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static void copy_pix(struct vivid_dev *dev, int win_y, int win_x,
			u16 *cap, const u16 *osd)
{
	u16 out;
	int left = dev->overlay_out_left;
	int top = dev->overlay_out_top;
	int fb_x = win_x + left;
	int fb_y = win_y + top;
	int i;

	out = *cap;
	*cap = *osd;
	if (dev->bitmap_out) {
		const u8 *p = dev->bitmap_out;
		unsigned stride = (dev->compose_out.width + 7) / 8;

		win_x -= dev->compose_out.left;
		win_y -= dev->compose_out.top;
		if (!(p[stride * win_y + win_x / 8] & (1 << (win_x & 7))))
			return;
	}

	for (i = 0; i < dev->clipcount_out; i++) {
		struct v4l2_rect *r = &dev->clips_out[i].c;

		if (fb_y >= r->top && fb_y < r->top + r->height &&
		    fb_x >= r->left && fb_x < r->left + r->width)
			return;
	}
	if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_CHROMAKEY) &&
	    *osd != dev->chromakey_out)
		return;
	if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_SRC_CHROMAKEY) &&
	    out == dev->chromakey_out)
		return;
	if (dev->fmt_cap->alpha_mask) {
		if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_GLOBAL_ALPHA) &&
		    dev->global_alpha_out)
			return;
		if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_LOCAL_ALPHA) &&
		    *cap & dev->fmt_cap->alpha_mask)
			return;
		if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_LOCAL_INV_ALPHA) &&
		    !(*cap & dev->fmt_cap->alpha_mask))
			return;
	}
	*cap = out;
}

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static void blend_line(struct vivid_dev *dev, unsigned y_offset, unsigned x_offset,
		u8 *vcapbuf, const u8 *vosdbuf,
		unsigned width, unsigned pixsize)
{
	unsigned x;

	for (x = 0; x < width; x++, vcapbuf += pixsize, vosdbuf += pixsize) {
		copy_pix(dev, y_offset, x_offset + x,
			 (u16 *)vcapbuf, (const u16 *)vosdbuf);
	}
}

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static void scale_line(const u8 *src, u8 *dst, unsigned srcw, unsigned dstw, unsigned twopixsize)
{
	/* Coarse scaling with Bresenham */
	unsigned int_part;
	unsigned fract_part;
	unsigned src_x = 0;
	unsigned error = 0;
	unsigned x;

	/*
         * We always combine two pixels to prevent color bleed in the packed
         * yuv case.
         */
	srcw /= 2;
	dstw /= 2;
	int_part = srcw / dstw;
	fract_part = srcw % dstw;
	for (x = 0; x < dstw; x++, dst += twopixsize) {
		memcpy(dst, src + src_x * twopixsize, twopixsize);
		src_x += int_part;
		error += fract_part;
		if (error >= dstw) {
			error -= dstw;
			src_x++;
		}
	}
}

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/*
 * Precalculate the rectangles needed to perform video looping:
 *
 * The nominal pipeline is that the video output buffer is cropped by
 * crop_out, scaled to compose_out, overlaid with the output overlay,
 * cropped on the capture side by crop_cap and scaled again to the video
 * capture buffer using compose_cap.
 *
 * To keep things efficient we calculate the intersection of compose_out
 * and crop_cap (since that's the only part of the video that will
 * actually end up in the capture buffer), determine which part of the
 * video output buffer that is and which part of the video capture buffer
 * so we can scale the video straight from the output buffer to the capture
 * buffer without any intermediate steps.
 *
 * If we need to deal with an output overlay, then there is no choice and
 * that intermediate step still has to be taken. For the output overlay
 * support we calculate the intersection of the framebuffer and the overlay
 * window (which may be partially or wholly outside of the framebuffer
 * itself) and the intersection of that with loop_vid_copy (i.e. the part of
 * the actual looped video that will be overlaid). The result is calculated
 * both in framebuffer coordinates (loop_fb_copy) and compose_out coordinates
 * (loop_vid_overlay). Finally calculate the part of the capture buffer that
 * will receive that overlaid video.
 */


static void vivid_precalc_copy_rects(struct vivid_dev *dev)
{
	/* Framebuffer rectangle */
	struct v4l2_rect r_fb = {
		0, 0, dev->display_width, dev->display_height
	};
	/* Overlay window rectangle in framebuffer coordinates */
	struct v4l2_rect r_overlay = {
		dev->overlay_out_left, dev->overlay_out_top,
		dev->compose_out.width, dev->compose_out.height
	};

	v4l2_rect_intersect(&dev->loop_vid_copy, &dev->crop_cap, &dev->compose_out);

	dev->loop_vid_out = dev->loop_vid_copy;
	v4l2_rect_scale(&dev->loop_vid_out, &dev->compose_out, &dev->crop_out);
	dev->loop_vid_out.left += dev->crop_out.left;
	dev->loop_vid_out.top += dev->crop_out.top;

	dev->loop_vid_cap = dev->loop_vid_copy;
	v4l2_rect_scale(&dev->loop_vid_cap, &dev->crop_cap, &dev->compose_cap);

	dprintk(dev, 1,
		"loop_vid_copy: %dx%d@%dx%d loop_vid_out: %dx%d@%dx%d loop_vid_cap: %dx%d@%dx%d\n",
		dev->loop_vid_copy.width, dev->loop_vid_copy.height,
		dev->loop_vid_copy.left, dev->loop_vid_copy.top,
		dev->loop_vid_out.width, dev->loop_vid_out.height,
		dev->loop_vid_out.left, dev->loop_vid_out.top,
		dev->loop_vid_cap.width, dev->loop_vid_cap.height,
		dev->loop_vid_cap.left, dev->loop_vid_cap.top);

	v4l2_rect_intersect(&r_overlay, &r_fb, &r_overlay);

	/* shift r_overlay to the same origin as compose_out */
	r_overlay.left += dev->compose_out.left - dev->overlay_out_left;
	r_overlay.top += dev->compose_out.top - dev->overlay_out_top;

	v4l2_rect_intersect(&dev->loop_vid_overlay, &r_overlay, &dev->loop_vid_copy);
	dev->loop_fb_copy = dev->loop_vid_overlay;

	/* shift dev->loop_fb_copy back again to the fb origin */
	dev->loop_fb_copy.left -= dev->compose_out.left - dev->overlay_out_left;
	dev->loop_fb_copy.top -= dev->compose_out.top - dev->overlay_out_top;

	dev->loop_vid_overlay_cap = dev->loop_vid_overlay;
	v4l2_rect_scale(&dev->loop_vid_overlay_cap, &dev->crop_cap, &dev->compose_cap);

	dprintk(dev, 1,
		"loop_fb_copy: %dx%d@%dx%d loop_vid_overlay: %dx%d@%dx%d loop_vid_overlay_cap: %dx%d@%dx%d\n",
		dev->loop_fb_copy.width, dev->loop_fb_copy.height,
		dev->loop_fb_copy.left, dev->loop_fb_copy.top,
		dev->loop_vid_overlay.width, dev->loop_vid_overlay.height,
		dev->loop_vid_overlay.left, dev->loop_vid_overlay.top,
		dev->loop_vid_overlay_cap.width, dev->loop_vid_overlay_cap.height,
		dev->loop_vid_overlay_cap.left, dev->loop_vid_overlay_cap.top);
}

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static void *plane_vaddr(struct tpg_data *tpg, struct vivid_buffer *buf,
			 unsigned p, unsigned bpl[TPG_MAX_PLANES], unsigned h)
{
	unsigned i;
	void *vbuf;

	if (p == 0 || tpg_g_buffers(tpg) > 1)
		return vb2_plane_vaddr(&buf->vb.vb2_buf, p);
	vbuf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
	for (i = 0; i < p; i++)
		vbuf += bpl[i] * h / tpg->vdownsampling[i];
	return vbuf;
}

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static int vivid_copy_buffer(struct vivid_dev *dev, unsigned p, u8 *vcapbuf,
		struct vivid_buffer *vid_cap_buf)
{
	bool blank = dev->must_blank[vid_cap_buf->vb.vb2_buf.index];
	struct tpg_data *tpg = &dev->tpg;
	struct vivid_buffer *vid_out_buf = NULL;
	unsigned vdiv = dev->fmt_out->vdownsampling[p];
	unsigned twopixsize = tpg_g_twopixelsize(tpg, p);
	unsigned img_width = tpg_hdiv(tpg, p, dev->compose_cap.width);
	unsigned img_height = dev->compose_cap.height;
	unsigned stride_cap = tpg->bytesperline[p];
	unsigned stride_out = dev->bytesperline_out[p];
	unsigned stride_osd = dev->display_byte_stride;
	unsigned hmax = (img_height * tpg->perc_fill) / 100;
	u8 *voutbuf;
	u8 *vosdbuf = NULL;
	unsigned y;
	bool blend = dev->bitmap_out || dev->clipcount_out || dev->fbuf_out_flags;
	/* Coarse scaling with Bresenham */
	unsigned vid_out_int_part;
	unsigned vid_out_fract_part;
	unsigned vid_out_y = 0;
	unsigned vid_out_error = 0;
	unsigned vid_overlay_int_part = 0;
	unsigned vid_overlay_fract_part = 0;
	unsigned vid_overlay_y = 0;
	unsigned vid_overlay_error = 0;
	unsigned vid_cap_left = tpg_hdiv(tpg, p, dev->loop_vid_cap.left);
	unsigned vid_cap_right;
	bool quick;

	vid_out_int_part = dev->loop_vid_out.height / dev->loop_vid_cap.height;
	vid_out_fract_part = dev->loop_vid_out.height % dev->loop_vid_cap.height;

	if (!list_empty(&dev->vid_out_active))
		vid_out_buf = list_entry(dev->vid_out_active.next,
					 struct vivid_buffer, list);
	if (vid_out_buf == NULL)
		return -ENODATA;

	vid_cap_buf->vb.field = vid_out_buf->vb.field;

	voutbuf = plane_vaddr(tpg, vid_out_buf, p,
			      dev->bytesperline_out, dev->fmt_out_rect.height);
	if (p < dev->fmt_out->buffers)
		voutbuf += vid_out_buf->vb.vb2_buf.planes[p].data_offset;
	voutbuf += tpg_hdiv(tpg, p, dev->loop_vid_out.left) +
		(dev->loop_vid_out.top / vdiv) * stride_out;
	vcapbuf += tpg_hdiv(tpg, p, dev->compose_cap.left) +
		(dev->compose_cap.top / vdiv) * stride_cap;

	if (dev->loop_vid_copy.width == 0 || dev->loop_vid_copy.height == 0) {
		/*
                 * If there is nothing to copy, then just fill the capture window
                 * with black.
                 */
		for (y = 0; y < hmax / vdiv; y++, vcapbuf += stride_cap)
			memcpy(vcapbuf, tpg->black_line[p], img_width);
		return 0;
	}

	if (dev->overlay_out_enabled &&
	    dev->loop_vid_overlay.width && dev->loop_vid_overlay.height) {
		vosdbuf = dev->video_vbase;
		vosdbuf += (dev->loop_fb_copy.left * twopixsize) / 2 +
			   dev->loop_fb_copy.top * stride_osd;
		vid_overlay_int_part = dev->loop_vid_overlay.height /
				       dev->loop_vid_overlay_cap.height;
		vid_overlay_fract_part = dev->loop_vid_overlay.height %
					 dev->loop_vid_overlay_cap.height;
	}

	vid_cap_right = tpg_hdiv(tpg, p, dev->loop_vid_cap.left + dev->loop_vid_cap.width);
	/* quick is true if no video scaling is needed */
	quick = dev->loop_vid_out.width == dev->loop_vid_cap.width;

	dev->cur_scaled_line = dev->loop_vid_out.height;
	for (y = 0; y < hmax; y += vdiv, vcapbuf += stride_cap) {
		/* osdline is true if this line requires overlay blending */
		bool osdline = vosdbuf && y >= dev->loop_vid_overlay_cap.top &&
			  y < dev->loop_vid_overlay_cap.top + dev->loop_vid_overlay_cap.height;

		/*
                 * If this line of the capture buffer doesn't get any video, then
                 * just fill with black.
                 */
		if (y < dev->loop_vid_cap.top ||
		    y >= dev->loop_vid_cap.top + dev->loop_vid_cap.height) {
			memcpy(vcapbuf, tpg->black_line[p], img_width);
			continue;
		}

		/* fill the left border with black */
		if (dev->loop_vid_cap.left)
			memcpy(vcapbuf, tpg->black_line[p], vid_cap_left);

		/* fill the right border with black */
		if (vid_cap_right < img_width)
			memcpy(vcapbuf + vid_cap_right, tpg->black_line[p],
				img_width - vid_cap_right);

		if (quick && !osdline) {
			memcpy(vcapbuf + vid_cap_left,
			       voutbuf + vid_out_y * stride_out,
			       tpg_hdiv(tpg, p, dev->loop_vid_cap.width));
			goto update_vid_out_y;
		}
		if (dev->cur_scaled_line == vid_out_y) {
			memcpy(vcapbuf + vid_cap_left, dev->scaled_line,
			       tpg_hdiv(tpg, p, dev->loop_vid_cap.width));
			goto update_vid_out_y;
		}
		if (!osdline) {
			scale_line(voutbuf + vid_out_y * stride_out, dev->scaled_line,
				tpg_hdiv(tpg, p, dev->loop_vid_out.width),
				tpg_hdiv(tpg, p, dev->loop_vid_cap.width),
				tpg_g_twopixelsize(tpg, p));
		} else {
			/*
                         * Offset in bytes within loop_vid_copy to the start of the
                         * loop_vid_overlay rectangle.
                         */
			unsigned offset =
				((dev->loop_vid_overlay.left - dev->loop_vid_copy.left) *
				 twopixsize) / 2;
			u8 *osd = vosdbuf + vid_overlay_y * stride_osd;

			scale_line(voutbuf + vid_out_y * stride_out, dev->blended_line,
				dev->loop_vid_out.width, dev->loop_vid_copy.width,
				tpg_g_twopixelsize(tpg, p));
			if (blend)
				blend_line(dev, vid_overlay_y + dev->loop_vid_overlay.top,
					   dev->loop_vid_overlay.left,
					   dev->blended_line + offset, osd,
					   dev->loop_vid_overlay.width, twopixsize / 2);
			else
				memcpy(dev->blended_line + offset,
				       osd, (dev->loop_vid_overlay.width * twopixsize) / 2);
			scale_line(dev->blended_line, dev->scaled_line,
					dev->loop_vid_copy.width, dev->loop_vid_cap.width,
					tpg_g_twopixelsize(tpg, p));
		}
		dev->cur_scaled_line = vid_out_y;
		memcpy(vcapbuf + vid_cap_left, dev->scaled_line,
		       tpg_hdiv(tpg, p, dev->loop_vid_cap.width));

update_vid_out_y:
		if (osdline) {
			vid_overlay_y += vid_overlay_int_part;
			vid_overlay_error += vid_overlay_fract_part;
			if (vid_overlay_error >= dev->loop_vid_overlay_cap.height) {
				vid_overlay_error -= dev->loop_vid_overlay_cap.height;
				vid_overlay_y++;
			}
		}
		vid_out_y += vid_out_int_part;
		vid_out_error += vid_out_fract_part;
		if (vid_out_error >= dev->loop_vid_cap.height / vdiv) {
			vid_out_error -= dev->loop_vid_cap.height / vdiv;
			vid_out_y++;
		}
	}

	if (!blank)
		return 0;
	for (; y < img_height; y += vdiv, vcapbuf += stride_cap)
		memcpy(vcapbuf, tpg->contrast_line[p], img_width);
	return 0;
}

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static void vivid_fillbuff(struct vivid_dev *dev, struct vivid_buffer *buf)
{
	struct tpg_data *tpg = &dev->tpg;
	unsigned factor = V4L2_FIELD_HAS_T_OR_B(dev->field_cap) ? 2 : 1;
	unsigned line_height = 16 / factor;
	bool is_tv = vivid_is_sdtv_cap(dev);
	bool is_60hz = is_tv && (dev->std_cap & V4L2_STD_525_60);
	unsigned p;
	int line = 1;
	u8 *basep[TPG_MAX_PLANES][2];
	unsigned ms;
	char str[100];
	s32 gain;
	bool is_loop = false;

	if (dev->loop_video && dev->can_loop_video &&
		((vivid_is_svid_cap(dev) &&
		!VIVID_INVALID_SIGNAL(dev->std_signal_mode)) ||
		(vivid_is_hdmi_cap(dev) &&
		!VIVID_INVALID_SIGNAL(dev->dv_timings_signal_mode))))
		is_loop = true;

	buf->vb.sequence = dev->vid_cap_seq_count;
	/*
         * Take the timestamp now if the timestamp source is set to
         * "Start of Exposure".
         */
	if (dev->tstamp_src_is_soe)
		buf->vb.vb2_buf.timestamp = ktime_get_ns();
	if (dev->field_cap == V4L2_FIELD_ALTERNATE) {
		/*
                 * 60 Hz standards start with the bottom field, 50 Hz standards
                 * with the top field. So if the 0-based seq_count is even,
                 * then the field is TOP for 50 Hz and BOTTOM for 60 Hz
                 * standards.
                 */
		buf->vb.field = ((dev->vid_cap_seq_count & 1) ^ is_60hz) ?
			V4L2_FIELD_BOTTOM : V4L2_FIELD_TOP;
		/*
                 * The sequence counter counts frames, not fields. So divide
                 * by two.
                 */
		buf->vb.sequence /= 2;
	} else {
		buf->vb.field = dev->field_cap;
	}
	tpg_s_field(tpg, buf->vb.field,
		    dev->field_cap == V4L2_FIELD_ALTERNATE);
	tpg_s_perc_fill_blank(tpg, dev->must_blank[buf->vb.vb2_buf.index]);

	vivid_precalc_copy_rects(dev);

	for (p = 0; p < tpg_g_planes(tpg); p++) {
		void *vbuf = plane_vaddr(tpg, buf, p,
					 tpg->bytesperline, tpg->buf_height);

		/*
                 * The first plane of a multiplanar format has a non-zero
                 * data_offset. This helps testing whether the application
                 * correctly supports non-zero data offsets.
                 */
		if (p < tpg_g_buffers(tpg) && dev->fmt_cap->data_offset[p]) {
			memset(vbuf, dev->fmt_cap->data_offset[p] & 0xff,
			       dev->fmt_cap->data_offset[p]);
			vbuf += dev->fmt_cap->data_offset[p];
		}
		tpg_calc_text_basep(tpg, basep, p, vbuf);
		if (!is_loop || vivid_copy_buffer(dev, p, vbuf, buf))
			tpg_fill_plane_buffer(tpg, vivid_get_std_cap(dev),
					p, vbuf);
	}
	dev->must_blank[buf->vb.vb2_buf.index] = false;

	/* Updates stream time, only update at the start of a new frame. */
	if (dev->field_cap != V4L2_FIELD_ALTERNATE ||
			(buf->vb.sequence & 1) == 0)
		dev->ms_vid_cap =
			jiffies_to_msecs(jiffies - dev->jiffies_vid_cap);

	ms = dev->ms_vid_cap;
	if (dev->osd_mode <= 1) {
		snprintf(str, sizeof(str), " %02d:%02d:%02d:%03d %u%s",
				(ms / (60 * 60 * 1000)) % 24,
				(ms / (60 * 1000)) % 60,
				(ms / 1000) % 60,
				ms % 1000,
				buf->vb.sequence,
				(dev->field_cap == V4L2_FIELD_ALTERNATE) ?
					(buf->vb.field == V4L2_FIELD_TOP ?
					 " top" : " bottom") : "");
		tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
	}
	if (dev->osd_mode == 0) {
		snprintf(str, sizeof(str), " %dx%d, input %d ",
				dev->src_rect.width, dev->src_rect.height, dev->input);
		tpg_gen_text(tpg, basep, line++ * line_height, 16, str);

		gain = v4l2_ctrl_g_ctrl(dev->gain);
		mutex_lock(dev->ctrl_hdl_user_vid.lock);
		snprintf(str, sizeof(str),
			" brightness %3d, contrast %3d, saturation %3d, hue %d ",
			dev->brightness->cur.val,
			dev->contrast->cur.val,
			dev->saturation->cur.val,
			dev->hue->cur.val);
		tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
		snprintf(str, sizeof(str),
			" autogain %d, gain %3d, alpha 0x%02x ",
			dev->autogain->cur.val, gain, dev->alpha->cur.val);
		mutex_unlock(dev->ctrl_hdl_user_vid.lock);
		tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
		mutex_lock(dev->ctrl_hdl_user_aud.lock);
		snprintf(str, sizeof(str),
			" volume %3d, mute %d ",
			dev->volume->cur.val, dev->mute->cur.val);
		mutex_unlock(dev->ctrl_hdl_user_aud.lock);
		tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
		mutex_lock(dev->ctrl_hdl_user_gen.lock);
		snprintf(str, sizeof(str), " int32 %d, int64 %lld, bitmask %08x ",
			dev->int32->cur.val,
			*dev->int64->p_cur.p_s64,
			dev->bitmask->cur.val);
		tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
		snprintf(str, sizeof(str), " boolean %d, menu %s, string \"%s\" ",
			dev->boolean->cur.val,
			dev->menu->qmenu[dev->menu->cur.val],
			dev->string->p_cur.p_char);
		tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
		snprintf(str, sizeof(str), " integer_menu %lld, value %d ",
			dev->int_menu->qmenu_int[dev->int_menu->cur.val],
			dev->int_menu->cur.val);
		mutex_unlock(dev->ctrl_hdl_user_gen.lock);
		tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
		if (dev->button_pressed) {
			dev->button_pressed--;
			snprintf(str, sizeof(str), " button pressed!");
			tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
		}
		if (dev->osd[0]) {
			if (vivid_is_hdmi_cap(dev)) {
				snprintf(str, sizeof(str),
					 " OSD \"%s\"", dev->osd);
				tpg_gen_text(tpg, basep, line++ * line_height,
					     16, str);
			}
			if (dev->osd_jiffies &&
			    time_is_before_jiffies(dev->osd_jiffies + 5 * HZ)) {
				dev->osd[0] = 0;
				dev->osd_jiffies = 0;
			}
		}
	}

	/*
         * If "End of Frame" is specified at the timestamp source, then take
         * the timestamp now.
         */
	if (!dev->tstamp_src_is_soe)
		buf->vb.vb2_buf.timestamp = ktime_get_ns();
	buf->vb.vb2_buf.timestamp += dev->time_wrap_offset;
}

Contributors
Person Tokens Prop Commits CommitProp
Hans Verkuil 1144 98.79% 5 71.43%
Junghak Sung 14 1.21% 2 28.57%
Total 1158 100.00% 7 100.00%

/*
 * Return true if this pixel coordinate is a valid video pixel.
 */


static bool valid_pix(struct vivid_dev *dev, int win_y, int win_x, int fb_y, int fb_x)
{
	int i;

	if (dev->bitmap_cap) {
		/*
                 * Only if the corresponding bit in the bitmap is set can
                 * the video pixel be shown. Coordinates are relative to
                 * the overlay window set by VIDIOC_S_FMT.
                 */
		const u8 *p = dev->bitmap_cap;
		unsigned stride = (dev->compose_cap.width + 7) / 8;

		if (!(p[stride * win_y + win_x / 8] & (1 << (win_x & 7))))
			return false;
	}

	for (i = 0; i < dev->clipcount_cap; i++) {
		/*
                 * Only if the framebuffer coordinate is not in any of the
                 * clip rectangles will be video pixel be shown.
                 */
		struct v4l2_rect *r = &dev->clips_cap[i].c;

		if (fb_y >= r->top && fb_y < r->top + r->height &&
		    fb_x >= r->left && fb_x < r->left + r->width)
			return false;
	}
	return true;
}

Contributors
Person Tokens Prop Commits CommitProp
Hans Verkuil 161 100.00% 1 100.00%
Total 161 100.00% 1 100.00%

/*
 * Draw the image into the overlay buffer.
 * Note that the combination of overlay and multiplanar is not supported.
 */


static void vivid_overlay(struct vivid_dev *dev, struct vivid_buffer *buf)
{
	struct tpg_data *tpg = &dev->tpg;
	unsigned pixsize = tpg_g_twopixelsize(tpg, 0) / 2;
	void *vbase = dev->fb_vbase_cap;
	void *vbuf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
	unsigned img_width = dev->compose_cap.width;
	unsigned img_height = dev->compose_cap.height;
	unsigned stride = tpg->bytesperline[0];
	/* if quick is true, then valid_pix() doesn't have to be called */
	bool quick = dev->bitmap_cap == NULL && dev->clipcount_cap == 0;
	int x, y, w, out_x = 0;

	/*
         * Overlay support is only supported for formats that have a twopixelsize
         * that's >= 2. Warn and bail out if that's not the case.
         */
	if (WARN_ON(pixsize == 0))
		return;
	if ((dev->overlay_cap_field == V4L2_FIELD_TOP ||
	     dev->overlay_cap_field == V4L2_FIELD_BOTTOM) &&
	    dev->overlay_cap_field != buf->vb.field)
		return;

	vbuf += dev->compose_cap.left * pixsize + dev->compose_cap.top * stride;
	x = dev->overlay_cap_left;
	w = img_width;
	if (x < 0) {
		out_x = -x;
		w = w - out_x;
		x = 0;
	} else {
		w = dev->fb_cap.fmt.width - x;
		if (w > img_width)
			w = img_width;
	}
	if (w <= 0)
		return;
	if (dev->overlay_cap_top >= 0)
		vbase += dev->overlay_cap_top * dev->fb_cap.fmt.bytesperline;
	for (y = dev->overlay_cap_top;
	     y < dev->overlay_cap_top + (int)img_height;
	     y++, vbuf += stride) {
		int px;

		if (y < 0 || y > dev->fb_cap.fmt.height)
			continue;
		if (quick) {
			memcpy(vbase + x * pixsize,
			       vbuf + out_x * pixsize, w * pixsize);
			vbase += dev->fb_cap.fmt.bytesperline;
			continue;
		}
		for (px = 0; px < w; px++) {
			if (!valid_pix(dev, y - dev->overlay_cap_top,
				       px + out_x, y, px + x))
				continue;
			memcpy(vbase + (px + x) * pixsize,
			       vbuf + (px + out_x) * pixsize,
			       pixsize);
		}
		vbase += dev->fb_cap.fmt.bytesperline;
	}
}

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Person Tokens Prop Commits CommitProp
Hans Verkuil 417 99.52% 2 66.67%
Junghak Sung 2 0.48% 1 33.33%
Total 419 100.00% 3 100.00%



static void vivid_thread_vid_cap_tick(struct vivid_dev *dev, int dropped_bufs)
{
	struct vivid_buffer *vid_cap_buf = NULL;
	struct vivid_buffer *vbi_cap_buf = NULL;

	dprintk(dev, 1, "Video Capture Thread Tick\n");

	while (dropped_bufs-- > 1)
		tpg_update_mv_count(&dev->tpg,
				dev->field_cap == V4L2_FIELD_NONE ||
				dev->field_cap == V4L2_FIELD_ALTERNATE);

	/* Drop a certain percentage of buffers. */
	if (dev->perc_dropped_buffers &&
	    prandom_u32_max(100) < dev->perc_dropped_buffers)
		goto update_mv;

	spin_lock(&dev->slock);
	if (!list_empty(&dev->vid_cap_active)) {
		vid_cap_buf = list_entry(dev->vid_cap_active.next, struct vivid_buffer, list);
		list_del(&vid_cap_buf->list);
	}
	if (!list_empty(&dev->vbi_cap_active)) {
		if (dev->field_cap != V4L2_FIELD_ALTERNATE ||
		    (dev->vbi_cap_seq_count & 1)) {
			vbi_cap_buf = list_entry(dev->vbi_cap_active.next,
						 struct vivid_buffer, list);
			list_del(&vbi_cap_buf->list);
		}
	}
	spin_unlock(&dev->slock);

	if (!vid_cap_buf && !vbi_cap_buf)
		goto update_mv;

	if (vid_cap_buf) {
		/* Fill buffer */
		vivid_fillbuff(dev, vid_cap_buf);
		dprintk(dev, 1, "filled buffer %d\n",
			vid_cap_buf->vb.vb2_buf.index);

		/* Handle overlay */
		if (dev->overlay_cap_owner && dev->fb_cap.base &&
			dev->fb_cap.fmt.pixelformat == dev->fmt_cap->fourcc)
			vivid_overlay(dev, vid_cap_buf);

		vb2_buffer_done(&vid_cap_buf->vb.vb2_buf, dev->dqbuf_error ?
				VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
		dprintk(dev, 2, "vid_cap buffer %d done\n",
				vid_cap_buf->vb.vb2_buf.index);
	}

	if (vbi_cap_buf) {
		if (dev->stream_sliced_vbi_cap)
			vivid_sliced_vbi_cap_process(dev, vbi_cap_buf);
		else
			vivid_raw_vbi_cap_process(dev, vbi_cap_buf);
		vb2_buffer_done(&vbi_cap_buf->vb.vb2_buf, dev->dqbuf_error ?
				VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
		dprintk(dev, 2, "vbi_cap %d done\n",
				vbi_cap_buf->vb.vb2_buf.index);
	}
	dev->dqbuf_error = false;

update_mv:
	/* Update the test pattern movement counters */
	tpg_update_mv_count(&dev->tpg, dev->field_cap == V4L2_FIELD_NONE ||
				       dev->field_cap == V4L2_FIELD_ALTERNATE);
}

Contributors
Person Tokens Prop Commits CommitProp
Hans Verkuil 386 98.22% 1 50.00%
Junghak Sung 7 1.78% 1 50.00%
Total 393 100.00% 2 100.00%



static int vivid_thread_vid_cap(void *data)
{
	struct vivid_dev *dev = data;
	u64 numerators_since_start;
	u64 buffers_since_start;
	u64 next_jiffies_since_start;
	unsigned long jiffies_since_start;
	unsigned long cur_jiffies;
	unsigned wait_jiffies;
	unsigned numerator;
	unsigned denominator;
	int dropped_bufs;

	dprintk(dev, 1, "Video Capture Thread Start\n");

	set_freezable();

	/* Resets frame counters */
	dev->cap_seq_offset = 0;
	dev->cap_seq_count = 0;
	dev->cap_seq_resync = false;
	dev->jiffies_vid_cap = jiffies;

	for (;;) {
		try_to_freeze();
		if (kthread_should_stop())
			break;

		mutex_lock(&dev->mutex);
		cur_jiffies = jiffies;
		if (dev->cap_seq_resync) {
			dev->jiffies_vid_cap = cur_jiffies;
			dev->cap_seq_offset = dev->cap_seq_count + 1;
			dev->cap_seq_count = 0;
			dev->cap_seq_resync = false;
		}
		numerator = dev->timeperframe_vid_cap.numerator;
		denominator = dev->timeperframe_vid_cap.denominator;

		if (dev->field_cap == V4L2_FIELD_ALTERNATE)
			denominator *= 2;

		/* Calculate the number of jiffies since we started streaming */
		jiffies_since_start = cur_jiffies - dev->jiffies_vid_cap;
		/* Get the number of buffers streamed since the start */
		buffers_since_start = (u64)jiffies_since_start * denominator +
				      (HZ * numerator) / 2;
		do_div(buffers_since_start, HZ * numerator);

		/*
                 * After more than 0xf0000000 (rounded down to a multiple of
                 * 'jiffies-per-day' to ease jiffies_to_msecs calculation)
                 * jiffies have passed since we started streaming reset the
                 * counters and keep track of the sequence offset.
                 */
		if (jiffies_since_start > JIFFIES_RESYNC) {
			dev->jiffies_vid_cap = cur_jiffies;
			dev->cap_seq_offset = buffers_since_start;
			buffers_since_start = 0;
		}
		dropped_bufs = buffers_since_start + dev->cap_seq_offset - dev->cap_seq_count;
		dev->cap_seq_count = buffers_since_start + dev->cap_seq_offset;
		dev->vid_cap_seq_count = dev->cap_seq_count - dev->vid_cap_seq_start;
		dev->vbi_cap_seq_count = dev->cap_seq_count - dev->vbi_cap_seq_start;

		vivid_thread_vid_cap_tick(dev, dropped_bufs);

		/*
                 * Calculate the number of 'numerators' streamed since we started,
                 * including the current buffer.
                 */
		numerators_since_start = ++buffers_since_start * numerator;

		/* And the number of jiffies since we started */
		jiffies_since_start = jiffies - dev->jiffies_vid_cap;

		mutex_unlock(&dev->mutex);

		/*
                 * Calculate when that next buffer is supposed to start
                 * in jiffies since we started streaming.
                 */
		next_jiffies_since_start = numerators_since_start * HZ +
					   denominator / 2;
		do_div(next_jiffies_since_start, denominator);
		/* If it is in the past, then just schedule asap */
		if (next_jiffies_since_start < jiffies_since_start)
			next_jiffies_since_start = jiffies_since_start;

		wait_jiffies = next_jiffies_since_start - jiffies_since_start;
		schedule_timeout_interruptible(wait_jiffies ? wait_jiffies : 1);
	}
	dprintk(dev, 1, "Video Capture Thread End\n");
	return 0;
}

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Hans Verkuil 370 100.00% 1 100.00%
Total 370 100.00% 1 100.00%



static void vivid_grab_controls(struct vivid_dev *dev, bool grab)
{
	v4l2_ctrl_grab(dev->ctrl_has_crop_cap, grab);
	v4l2_ctrl_grab(dev->ctrl_has_compose_cap, grab);
	v4l2_ctrl_grab(dev->ctrl_has_scaler_cap, grab);
}

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Hans Verkuil 41 100.00% 1 100.00%
Total 41 100.00% 1 100.00%



int vivid_start_generating_vid_cap(struct vivid_dev *dev, bool *pstreaming)
{
	dprintk(dev, 1, "%s\n", __func__);

	if (dev->kthread_vid_cap) {
		u32 seq_count = dev->cap_seq_count + dev->seq_wrap * 128;

		if (pstreaming == &dev->vid_cap_streaming)
			dev->vid_cap_seq_start = seq_count;
		else
			dev->vbi_cap_seq_start = seq_count;
		*pstreaming = true;
		return 0;
	}

	/* Resets frame counters */
	tpg_init_mv_count(&dev->tpg);

	dev->vid_cap_seq_start = dev->seq_wrap * 128;
	dev->vbi_cap_seq_start = dev->seq_wrap * 128;

	dev->kthread_vid_cap = kthread_run(vivid_thread_vid_cap, dev,
			"%s-vid-cap", dev->v4l2_dev.name);

	if (IS_ERR(dev->kthread_vid_cap)) {
		v4l2_err(&dev->v4l2_dev, "kernel_thread() failed\n");
		return PTR_ERR(dev->kthread_vid_cap);
	}
	*pstreaming = true;
	vivid_grab_controls(dev, true);

	dprintk(dev, 1, "returning from %s\n", __func__);
	return 0;
}

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Hans Verkuil 179 100.00% 1 100.00%
Total 179 100.00% 1 100.00%



void vivid_stop_generating_vid_cap(struct vivid_dev *dev, bool *pstreaming)
{
	dprintk(dev, 1, "%s\n", __func__);

	if (dev->kthread_vid_cap == NULL)
		return;

	*pstreaming = false;
	if (pstreaming == &dev->vid_cap_streaming) {
		/* Release all active buffers */
		while (!list_empty(&dev->vid_cap_active)) {
			struct vivid_buffer *buf;

			buf = list_entry(dev->vid_cap_active.next,
					 struct vivid_buffer, list);
			list_del(&buf->list);
			vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
			dprintk(dev, 2, "vid_cap buffer %d done\n",
				buf->vb.vb2_buf.index);
		}
	}

	if (pstreaming == &dev->vbi_cap_streaming) {
		while (!list_empty(&dev->vbi_cap_active)) {
			struct vivid_buffer *buf;

			buf = list_entry(dev->vbi_cap_active.next,
					 struct vivid_buffer, list);
			list_del(&buf->list);
			vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
			dprintk(dev, 2, "vbi_cap buffer %d done\n",
				buf->vb.vb2_buf.index);
		}
	}

	if (dev->vid_cap_streaming || dev->vbi_cap_streaming)
		return;

	/* shutdown control thread */
	vivid_grab_controls(dev, false);
	mutex_unlock(&dev->mutex);
	kthread_stop(dev->kthread_vid_cap);
	dev->kthread_vid_cap = NULL;
	mutex_lock(&dev->mutex);
}
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Person Tokens Prop Commits CommitProp
Hans Verkuil 246 97.62% 1 50.00%
Junghak Sung 6 2.38% 1 50.00%
Total 252 100.00% 2 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
Hans Verkuil 5292 99.25% 7 70.00%
Junghak Sung 37 0.69% 2 20.00%
Mauro Carvalho Chehab 3 0.06% 1 10.00%
Total 5332 100.00% 10 100.00%
Directory: drivers/media/platform/vivid

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Hans Verkuil	28	100.00%	1	100.00%
Total	28	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 drivers/media/platform/vivid/vivid-kthread-cap.c

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