1 // SPDX-License-Identifier: GPL-2.0-only
3 * vivid-kthread-cap.h - video/vbi capture thread support functions.
5 * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
8 #include <linux/module.h>
9 #include <linux/errno.h>
10 #include <linux/kernel.h>
11 #include <linux/init.h>
12 #include <linux/sched.h>
13 #include <linux/slab.h>
14 #include <linux/font.h>
15 #include <linux/mutex.h>
16 #include <linux/videodev2.h>
17 #include <linux/kthread.h>
18 #include <linux/freezer.h>
19 #include <linux/random.h>
20 #include <linux/v4l2-dv-timings.h>
21 #include <asm/div64.h>
22 #include <media/videobuf2-vmalloc.h>
23 #include <media/v4l2-dv-timings.h>
24 #include <media/v4l2-ioctl.h>
25 #include <media/v4l2-fh.h>
26 #include <media/v4l2-event.h>
27 #include <media/v4l2-rect.h>
29 #include "vivid-core.h"
30 #include "vivid-vid-common.h"
31 #include "vivid-vid-cap.h"
32 #include "vivid-vid-out.h"
33 #include "vivid-radio-common.h"
34 #include "vivid-radio-rx.h"
35 #include "vivid-radio-tx.h"
36 #include "vivid-sdr-cap.h"
37 #include "vivid-vbi-cap.h"
38 #include "vivid-vbi-out.h"
39 #include "vivid-osd.h"
40 #include "vivid-ctrls.h"
41 #include "vivid-kthread-cap.h"
42 #include "vivid-meta-cap.h"
44 static inline v4l2_std_id vivid_get_std_cap(const struct vivid_dev *dev)
46 if (vivid_is_sdtv_cap(dev))
47 return dev->std_cap[dev->input];
51 static void copy_pix(struct vivid_dev *dev, int win_y, int win_x,
52 u16 *cap, const u16 *osd)
55 int left = dev->overlay_out_left;
56 int top = dev->overlay_out_top;
57 int fb_x = win_x + left;
58 int fb_y = win_y + top;
63 if (dev->bitmap_out) {
64 const u8 *p = dev->bitmap_out;
65 unsigned stride = (dev->compose_out.width + 7) / 8;
67 win_x -= dev->compose_out.left;
68 win_y -= dev->compose_out.top;
69 if (!(p[stride * win_y + win_x / 8] & (1 << (win_x & 7))))
73 for (i = 0; i < dev->clipcount_out; i++) {
74 struct v4l2_rect *r = &dev->clips_out[i].c;
76 if (fb_y >= r->top && fb_y < r->top + r->height &&
77 fb_x >= r->left && fb_x < r->left + r->width)
80 if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_CHROMAKEY) &&
81 *osd != dev->chromakey_out)
83 if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_SRC_CHROMAKEY) &&
84 out == dev->chromakey_out)
86 if (dev->fmt_cap->alpha_mask) {
87 if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_GLOBAL_ALPHA) &&
88 dev->global_alpha_out)
90 if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_LOCAL_ALPHA) &&
91 *cap & dev->fmt_cap->alpha_mask)
93 if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_LOCAL_INV_ALPHA) &&
94 !(*cap & dev->fmt_cap->alpha_mask))
100 static void blend_line(struct vivid_dev *dev, unsigned y_offset, unsigned x_offset,
101 u8 *vcapbuf, const u8 *vosdbuf,
102 unsigned width, unsigned pixsize)
106 for (x = 0; x < width; x++, vcapbuf += pixsize, vosdbuf += pixsize) {
107 copy_pix(dev, y_offset, x_offset + x,
108 (u16 *)vcapbuf, (const u16 *)vosdbuf);
112 static void scale_line(const u8 *src, u8 *dst, unsigned srcw, unsigned dstw, unsigned twopixsize)
114 /* Coarse scaling with Bresenham */
122 * We always combine two pixels to prevent color bleed in the packed
127 int_part = srcw / dstw;
128 fract_part = srcw % dstw;
129 for (x = 0; x < dstw; x++, dst += twopixsize) {
130 memcpy(dst, src + src_x * twopixsize, twopixsize);
141 * Precalculate the rectangles needed to perform video looping:
143 * The nominal pipeline is that the video output buffer is cropped by
144 * crop_out, scaled to compose_out, overlaid with the output overlay,
145 * cropped on the capture side by crop_cap and scaled again to the video
146 * capture buffer using compose_cap.
148 * To keep things efficient we calculate the intersection of compose_out
149 * and crop_cap (since that's the only part of the video that will
150 * actually end up in the capture buffer), determine which part of the
151 * video output buffer that is and which part of the video capture buffer
152 * so we can scale the video straight from the output buffer to the capture
153 * buffer without any intermediate steps.
155 * If we need to deal with an output overlay, then there is no choice and
156 * that intermediate step still has to be taken. For the output overlay
157 * support we calculate the intersection of the framebuffer and the overlay
158 * window (which may be partially or wholly outside of the framebuffer
159 * itself) and the intersection of that with loop_vid_copy (i.e. the part of
160 * the actual looped video that will be overlaid). The result is calculated
161 * both in framebuffer coordinates (loop_fb_copy) and compose_out coordinates
162 * (loop_vid_overlay). Finally calculate the part of the capture buffer that
163 * will receive that overlaid video.
165 static void vivid_precalc_copy_rects(struct vivid_dev *dev)
167 /* Framebuffer rectangle */
168 struct v4l2_rect r_fb = {
169 0, 0, dev->display_width, dev->display_height
171 /* Overlay window rectangle in framebuffer coordinates */
172 struct v4l2_rect r_overlay = {
173 dev->overlay_out_left, dev->overlay_out_top,
174 dev->compose_out.width, dev->compose_out.height
177 v4l2_rect_intersect(&dev->loop_vid_copy, &dev->crop_cap, &dev->compose_out);
179 dev->loop_vid_out = dev->loop_vid_copy;
180 v4l2_rect_scale(&dev->loop_vid_out, &dev->compose_out, &dev->crop_out);
181 dev->loop_vid_out.left += dev->crop_out.left;
182 dev->loop_vid_out.top += dev->crop_out.top;
184 dev->loop_vid_cap = dev->loop_vid_copy;
185 v4l2_rect_scale(&dev->loop_vid_cap, &dev->crop_cap, &dev->compose_cap);
188 "loop_vid_copy: %dx%d@%dx%d loop_vid_out: %dx%d@%dx%d loop_vid_cap: %dx%d@%dx%d\n",
189 dev->loop_vid_copy.width, dev->loop_vid_copy.height,
190 dev->loop_vid_copy.left, dev->loop_vid_copy.top,
191 dev->loop_vid_out.width, dev->loop_vid_out.height,
192 dev->loop_vid_out.left, dev->loop_vid_out.top,
193 dev->loop_vid_cap.width, dev->loop_vid_cap.height,
194 dev->loop_vid_cap.left, dev->loop_vid_cap.top);
196 v4l2_rect_intersect(&r_overlay, &r_fb, &r_overlay);
198 /* shift r_overlay to the same origin as compose_out */
199 r_overlay.left += dev->compose_out.left - dev->overlay_out_left;
200 r_overlay.top += dev->compose_out.top - dev->overlay_out_top;
202 v4l2_rect_intersect(&dev->loop_vid_overlay, &r_overlay, &dev->loop_vid_copy);
203 dev->loop_fb_copy = dev->loop_vid_overlay;
205 /* shift dev->loop_fb_copy back again to the fb origin */
206 dev->loop_fb_copy.left -= dev->compose_out.left - dev->overlay_out_left;
207 dev->loop_fb_copy.top -= dev->compose_out.top - dev->overlay_out_top;
209 dev->loop_vid_overlay_cap = dev->loop_vid_overlay;
210 v4l2_rect_scale(&dev->loop_vid_overlay_cap, &dev->crop_cap, &dev->compose_cap);
213 "loop_fb_copy: %dx%d@%dx%d loop_vid_overlay: %dx%d@%dx%d loop_vid_overlay_cap: %dx%d@%dx%d\n",
214 dev->loop_fb_copy.width, dev->loop_fb_copy.height,
215 dev->loop_fb_copy.left, dev->loop_fb_copy.top,
216 dev->loop_vid_overlay.width, dev->loop_vid_overlay.height,
217 dev->loop_vid_overlay.left, dev->loop_vid_overlay.top,
218 dev->loop_vid_overlay_cap.width, dev->loop_vid_overlay_cap.height,
219 dev->loop_vid_overlay_cap.left, dev->loop_vid_overlay_cap.top);
222 static void *plane_vaddr(struct tpg_data *tpg, struct vivid_buffer *buf,
223 unsigned p, unsigned bpl[TPG_MAX_PLANES], unsigned h)
228 if (p == 0 || tpg_g_buffers(tpg) > 1)
229 return vb2_plane_vaddr(&buf->vb.vb2_buf, p);
230 vbuf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
231 for (i = 0; i < p; i++)
232 vbuf += bpl[i] * h / tpg->vdownsampling[i];
236 static noinline_for_stack int vivid_copy_buffer(struct vivid_dev *dev, unsigned p,
237 u8 *vcapbuf, struct vivid_buffer *vid_cap_buf)
239 bool blank = dev->must_blank[vid_cap_buf->vb.vb2_buf.index];
240 struct tpg_data *tpg = &dev->tpg;
241 struct vivid_buffer *vid_out_buf = NULL;
242 unsigned vdiv = dev->fmt_out->vdownsampling[p];
243 unsigned twopixsize = tpg_g_twopixelsize(tpg, p);
244 unsigned img_width = tpg_hdiv(tpg, p, dev->compose_cap.width);
245 unsigned img_height = dev->compose_cap.height;
246 unsigned stride_cap = tpg->bytesperline[p];
247 unsigned stride_out = dev->bytesperline_out[p];
248 unsigned stride_osd = dev->display_byte_stride;
249 unsigned hmax = (img_height * tpg->perc_fill) / 100;
253 bool blend = dev->bitmap_out || dev->clipcount_out || dev->fbuf_out_flags;
254 /* Coarse scaling with Bresenham */
255 unsigned vid_out_int_part;
256 unsigned vid_out_fract_part;
257 unsigned vid_out_y = 0;
258 unsigned vid_out_error = 0;
259 unsigned vid_overlay_int_part = 0;
260 unsigned vid_overlay_fract_part = 0;
261 unsigned vid_overlay_y = 0;
262 unsigned vid_overlay_error = 0;
263 unsigned vid_cap_left = tpg_hdiv(tpg, p, dev->loop_vid_cap.left);
264 unsigned vid_cap_right;
267 vid_out_int_part = dev->loop_vid_out.height / dev->loop_vid_cap.height;
268 vid_out_fract_part = dev->loop_vid_out.height % dev->loop_vid_cap.height;
270 if (!list_empty(&dev->vid_out_active))
271 vid_out_buf = list_entry(dev->vid_out_active.next,
272 struct vivid_buffer, list);
273 if (vid_out_buf == NULL)
276 vid_cap_buf->vb.field = vid_out_buf->vb.field;
278 voutbuf = plane_vaddr(tpg, vid_out_buf, p,
279 dev->bytesperline_out, dev->fmt_out_rect.height);
280 if (p < dev->fmt_out->buffers)
281 voutbuf += vid_out_buf->vb.vb2_buf.planes[p].data_offset;
282 voutbuf += tpg_hdiv(tpg, p, dev->loop_vid_out.left) +
283 (dev->loop_vid_out.top / vdiv) * stride_out;
284 vcapbuf += tpg_hdiv(tpg, p, dev->compose_cap.left) +
285 (dev->compose_cap.top / vdiv) * stride_cap;
287 if (dev->loop_vid_copy.width == 0 || dev->loop_vid_copy.height == 0) {
289 * If there is nothing to copy, then just fill the capture window
292 for (y = 0; y < hmax / vdiv; y++, vcapbuf += stride_cap)
293 memcpy(vcapbuf, tpg->black_line[p], img_width);
297 if (dev->overlay_out_enabled &&
298 dev->loop_vid_overlay.width && dev->loop_vid_overlay.height) {
299 vosdbuf = dev->video_vbase;
300 vosdbuf += (dev->loop_fb_copy.left * twopixsize) / 2 +
301 dev->loop_fb_copy.top * stride_osd;
302 vid_overlay_int_part = dev->loop_vid_overlay.height /
303 dev->loop_vid_overlay_cap.height;
304 vid_overlay_fract_part = dev->loop_vid_overlay.height %
305 dev->loop_vid_overlay_cap.height;
308 vid_cap_right = tpg_hdiv(tpg, p, dev->loop_vid_cap.left + dev->loop_vid_cap.width);
309 /* quick is true if no video scaling is needed */
310 quick = dev->loop_vid_out.width == dev->loop_vid_cap.width;
312 dev->cur_scaled_line = dev->loop_vid_out.height;
313 for (y = 0; y < hmax; y += vdiv, vcapbuf += stride_cap) {
314 /* osdline is true if this line requires overlay blending */
315 bool osdline = vosdbuf && y >= dev->loop_vid_overlay_cap.top &&
316 y < dev->loop_vid_overlay_cap.top + dev->loop_vid_overlay_cap.height;
319 * If this line of the capture buffer doesn't get any video, then
320 * just fill with black.
322 if (y < dev->loop_vid_cap.top ||
323 y >= dev->loop_vid_cap.top + dev->loop_vid_cap.height) {
324 memcpy(vcapbuf, tpg->black_line[p], img_width);
328 /* fill the left border with black */
329 if (dev->loop_vid_cap.left)
330 memcpy(vcapbuf, tpg->black_line[p], vid_cap_left);
332 /* fill the right border with black */
333 if (vid_cap_right < img_width)
334 memcpy(vcapbuf + vid_cap_right, tpg->black_line[p],
335 img_width - vid_cap_right);
337 if (quick && !osdline) {
338 memcpy(vcapbuf + vid_cap_left,
339 voutbuf + vid_out_y * stride_out,
340 tpg_hdiv(tpg, p, dev->loop_vid_cap.width));
341 goto update_vid_out_y;
343 if (dev->cur_scaled_line == vid_out_y) {
344 memcpy(vcapbuf + vid_cap_left, dev->scaled_line,
345 tpg_hdiv(tpg, p, dev->loop_vid_cap.width));
346 goto update_vid_out_y;
349 scale_line(voutbuf + vid_out_y * stride_out, dev->scaled_line,
350 tpg_hdiv(tpg, p, dev->loop_vid_out.width),
351 tpg_hdiv(tpg, p, dev->loop_vid_cap.width),
352 tpg_g_twopixelsize(tpg, p));
355 * Offset in bytes within loop_vid_copy to the start of the
356 * loop_vid_overlay rectangle.
359 ((dev->loop_vid_overlay.left - dev->loop_vid_copy.left) *
361 u8 *osd = vosdbuf + vid_overlay_y * stride_osd;
363 scale_line(voutbuf + vid_out_y * stride_out, dev->blended_line,
364 dev->loop_vid_out.width, dev->loop_vid_copy.width,
365 tpg_g_twopixelsize(tpg, p));
367 blend_line(dev, vid_overlay_y + dev->loop_vid_overlay.top,
368 dev->loop_vid_overlay.left,
369 dev->blended_line + offset, osd,
370 dev->loop_vid_overlay.width, twopixsize / 2);
372 memcpy(dev->blended_line + offset,
373 osd, (dev->loop_vid_overlay.width * twopixsize) / 2);
374 scale_line(dev->blended_line, dev->scaled_line,
375 dev->loop_vid_copy.width, dev->loop_vid_cap.width,
376 tpg_g_twopixelsize(tpg, p));
378 dev->cur_scaled_line = vid_out_y;
379 memcpy(vcapbuf + vid_cap_left, dev->scaled_line,
380 tpg_hdiv(tpg, p, dev->loop_vid_cap.width));
384 vid_overlay_y += vid_overlay_int_part;
385 vid_overlay_error += vid_overlay_fract_part;
386 if (vid_overlay_error >= dev->loop_vid_overlay_cap.height) {
387 vid_overlay_error -= dev->loop_vid_overlay_cap.height;
391 vid_out_y += vid_out_int_part;
392 vid_out_error += vid_out_fract_part;
393 if (vid_out_error >= dev->loop_vid_cap.height / vdiv) {
394 vid_out_error -= dev->loop_vid_cap.height / vdiv;
401 for (; y < img_height; y += vdiv, vcapbuf += stride_cap)
402 memcpy(vcapbuf, tpg->contrast_line[p], img_width);
406 static void vivid_fillbuff(struct vivid_dev *dev, struct vivid_buffer *buf)
408 struct tpg_data *tpg = &dev->tpg;
409 unsigned factor = V4L2_FIELD_HAS_T_OR_B(dev->field_cap) ? 2 : 1;
410 unsigned line_height = 16 / factor;
411 bool is_tv = vivid_is_sdtv_cap(dev);
412 bool is_60hz = is_tv && (dev->std_cap[dev->input] & V4L2_STD_525_60);
415 u8 *basep[TPG_MAX_PLANES][2];
419 bool is_loop = false;
421 if (dev->loop_video && dev->can_loop_video &&
422 ((vivid_is_svid_cap(dev) &&
423 !VIVID_INVALID_SIGNAL(dev->std_signal_mode[dev->input])) ||
424 (vivid_is_hdmi_cap(dev) &&
425 !VIVID_INVALID_SIGNAL(dev->dv_timings_signal_mode[dev->input]))))
428 buf->vb.sequence = dev->vid_cap_seq_count;
429 v4l2_ctrl_s_ctrl(dev->ro_int32, buf->vb.sequence & 0xff);
430 if (dev->field_cap == V4L2_FIELD_ALTERNATE) {
432 * 60 Hz standards start with the bottom field, 50 Hz standards
433 * with the top field. So if the 0-based seq_count is even,
434 * then the field is TOP for 50 Hz and BOTTOM for 60 Hz
437 buf->vb.field = ((dev->vid_cap_seq_count & 1) ^ is_60hz) ?
438 V4L2_FIELD_BOTTOM : V4L2_FIELD_TOP;
440 * The sequence counter counts frames, not fields. So divide
443 buf->vb.sequence /= 2;
445 buf->vb.field = dev->field_cap;
447 tpg_s_field(tpg, buf->vb.field,
448 dev->field_cap == V4L2_FIELD_ALTERNATE);
449 tpg_s_perc_fill_blank(tpg, dev->must_blank[buf->vb.vb2_buf.index]);
451 vivid_precalc_copy_rects(dev);
453 for (p = 0; p < tpg_g_planes(tpg); p++) {
454 void *vbuf = plane_vaddr(tpg, buf, p,
455 tpg->bytesperline, tpg->buf_height);
458 * The first plane of a multiplanar format has a non-zero
459 * data_offset. This helps testing whether the application
460 * correctly supports non-zero data offsets.
462 if (p < tpg_g_buffers(tpg) && dev->fmt_cap->data_offset[p]) {
463 memset(vbuf, dev->fmt_cap->data_offset[p] & 0xff,
464 dev->fmt_cap->data_offset[p]);
465 vbuf += dev->fmt_cap->data_offset[p];
467 tpg_calc_text_basep(tpg, basep, p, vbuf);
468 if (!is_loop || vivid_copy_buffer(dev, p, vbuf, buf))
469 tpg_fill_plane_buffer(tpg, vivid_get_std_cap(dev),
472 dev->must_blank[buf->vb.vb2_buf.index] = false;
474 /* Updates stream time, only update at the start of a new frame. */
475 if (dev->field_cap != V4L2_FIELD_ALTERNATE ||
476 (dev->vid_cap_seq_count & 1) == 0)
478 jiffies_to_msecs(jiffies - dev->jiffies_vid_cap);
480 ms = dev->ms_vid_cap;
481 if (dev->osd_mode <= 1) {
482 snprintf(str, sizeof(str), " %02d:%02d:%02d:%03d %u%s",
483 (ms / (60 * 60 * 1000)) % 24,
484 (ms / (60 * 1000)) % 60,
488 (dev->field_cap == V4L2_FIELD_ALTERNATE) ?
489 (buf->vb.field == V4L2_FIELD_TOP ?
490 " top" : " bottom") : "");
491 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
493 if (dev->osd_mode == 0) {
494 snprintf(str, sizeof(str), " %dx%d, input %d ",
495 dev->src_rect.width, dev->src_rect.height, dev->input);
496 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
498 gain = v4l2_ctrl_g_ctrl(dev->gain);
499 mutex_lock(dev->ctrl_hdl_user_vid.lock);
500 snprintf(str, sizeof(str),
501 " brightness %3d, contrast %3d, saturation %3d, hue %d ",
502 dev->brightness->cur.val,
503 dev->contrast->cur.val,
504 dev->saturation->cur.val,
506 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
507 snprintf(str, sizeof(str),
508 " autogain %d, gain %3d, alpha 0x%02x ",
509 dev->autogain->cur.val, gain, dev->alpha->cur.val);
510 mutex_unlock(dev->ctrl_hdl_user_vid.lock);
511 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
512 mutex_lock(dev->ctrl_hdl_user_aud.lock);
513 snprintf(str, sizeof(str),
514 " volume %3d, mute %d ",
515 dev->volume->cur.val, dev->mute->cur.val);
516 mutex_unlock(dev->ctrl_hdl_user_aud.lock);
517 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
518 mutex_lock(dev->ctrl_hdl_user_gen.lock);
519 snprintf(str, sizeof(str), " int32 %d, ro_int32 %d, int64 %lld, bitmask %08x ",
521 dev->ro_int32->cur.val,
522 *dev->int64->p_cur.p_s64,
523 dev->bitmask->cur.val);
524 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
525 snprintf(str, sizeof(str), " boolean %d, menu %s, string \"%s\" ",
526 dev->boolean->cur.val,
527 dev->menu->qmenu[dev->menu->cur.val],
528 dev->string->p_cur.p_char);
529 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
530 snprintf(str, sizeof(str), " integer_menu %lld, value %d ",
531 dev->int_menu->qmenu_int[dev->int_menu->cur.val],
532 dev->int_menu->cur.val);
533 mutex_unlock(dev->ctrl_hdl_user_gen.lock);
534 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
535 if (dev->button_pressed) {
536 dev->button_pressed--;
537 snprintf(str, sizeof(str), " button pressed!");
538 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
541 if (vivid_is_hdmi_cap(dev)) {
542 snprintf(str, sizeof(str),
543 " OSD \"%s\"", dev->osd);
544 tpg_gen_text(tpg, basep, line++ * line_height,
547 if (dev->osd_jiffies &&
548 time_is_before_jiffies(dev->osd_jiffies + 5 * HZ)) {
550 dev->osd_jiffies = 0;
557 * Return true if this pixel coordinate is a valid video pixel.
559 static bool valid_pix(struct vivid_dev *dev, int win_y, int win_x, int fb_y, int fb_x)
563 if (dev->bitmap_cap) {
565 * Only if the corresponding bit in the bitmap is set can
566 * the video pixel be shown. Coordinates are relative to
567 * the overlay window set by VIDIOC_S_FMT.
569 const u8 *p = dev->bitmap_cap;
570 unsigned stride = (dev->compose_cap.width + 7) / 8;
572 if (!(p[stride * win_y + win_x / 8] & (1 << (win_x & 7))))
576 for (i = 0; i < dev->clipcount_cap; i++) {
578 * Only if the framebuffer coordinate is not in any of the
579 * clip rectangles will be video pixel be shown.
581 struct v4l2_rect *r = &dev->clips_cap[i].c;
583 if (fb_y >= r->top && fb_y < r->top + r->height &&
584 fb_x >= r->left && fb_x < r->left + r->width)
591 * Draw the image into the overlay buffer.
592 * Note that the combination of overlay and multiplanar is not supported.
594 static void vivid_overlay(struct vivid_dev *dev, struct vivid_buffer *buf)
596 struct tpg_data *tpg = &dev->tpg;
597 unsigned pixsize = tpg_g_twopixelsize(tpg, 0) / 2;
598 void *vbase = dev->fb_vbase_cap;
599 void *vbuf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
600 unsigned img_width = dev->compose_cap.width;
601 unsigned img_height = dev->compose_cap.height;
602 unsigned stride = tpg->bytesperline[0];
603 /* if quick is true, then valid_pix() doesn't have to be called */
604 bool quick = dev->bitmap_cap == NULL && dev->clipcount_cap == 0;
605 int x, y, w, out_x = 0;
608 * Overlay support is only supported for formats that have a twopixelsize
609 * that's >= 2. Warn and bail out if that's not the case.
611 if (WARN_ON(pixsize == 0))
613 if ((dev->overlay_cap_field == V4L2_FIELD_TOP ||
614 dev->overlay_cap_field == V4L2_FIELD_BOTTOM) &&
615 dev->overlay_cap_field != buf->vb.field)
618 vbuf += dev->compose_cap.left * pixsize + dev->compose_cap.top * stride;
619 x = dev->overlay_cap_left;
626 w = dev->fb_cap.fmt.width - x;
632 if (dev->overlay_cap_top >= 0)
633 vbase += dev->overlay_cap_top * dev->fb_cap.fmt.bytesperline;
634 for (y = dev->overlay_cap_top;
635 y < dev->overlay_cap_top + (int)img_height;
636 y++, vbuf += stride) {
639 if (y < 0 || y > dev->fb_cap.fmt.height)
642 memcpy(vbase + x * pixsize,
643 vbuf + out_x * pixsize, w * pixsize);
644 vbase += dev->fb_cap.fmt.bytesperline;
647 for (px = 0; px < w; px++) {
648 if (!valid_pix(dev, y - dev->overlay_cap_top,
649 px + out_x, y, px + x))
651 memcpy(vbase + (px + x) * pixsize,
652 vbuf + (px + out_x) * pixsize,
655 vbase += dev->fb_cap.fmt.bytesperline;
659 static void vivid_cap_update_frame_period(struct vivid_dev *dev)
663 f_period = (u64)dev->timeperframe_vid_cap.numerator * 1000000000;
664 if (WARN_ON(dev->timeperframe_vid_cap.denominator == 0))
665 dev->timeperframe_vid_cap.denominator = 1;
666 do_div(f_period, dev->timeperframe_vid_cap.denominator);
667 if (dev->field_cap == V4L2_FIELD_ALTERNATE)
670 * If "End of Frame", then offset the exposure time by 0.9
671 * of the frame period.
673 dev->cap_frame_eof_offset = f_period * 9;
674 do_div(dev->cap_frame_eof_offset, 10);
675 dev->cap_frame_period = f_period;
678 static noinline_for_stack void vivid_thread_vid_cap_tick(struct vivid_dev *dev,
681 struct vivid_buffer *vid_cap_buf = NULL;
682 struct vivid_buffer *vbi_cap_buf = NULL;
683 struct vivid_buffer *meta_cap_buf = NULL;
686 dprintk(dev, 1, "Video Capture Thread Tick\n");
688 while (dropped_bufs-- > 1)
689 tpg_update_mv_count(&dev->tpg,
690 dev->field_cap == V4L2_FIELD_NONE ||
691 dev->field_cap == V4L2_FIELD_ALTERNATE);
693 /* Drop a certain percentage of buffers. */
694 if (dev->perc_dropped_buffers &&
695 prandom_u32_max(100) < dev->perc_dropped_buffers)
698 spin_lock(&dev->slock);
699 if (!list_empty(&dev->vid_cap_active)) {
700 vid_cap_buf = list_entry(dev->vid_cap_active.next, struct vivid_buffer, list);
701 list_del(&vid_cap_buf->list);
703 if (!list_empty(&dev->vbi_cap_active)) {
704 if (dev->field_cap != V4L2_FIELD_ALTERNATE ||
705 (dev->vbi_cap_seq_count & 1)) {
706 vbi_cap_buf = list_entry(dev->vbi_cap_active.next,
707 struct vivid_buffer, list);
708 list_del(&vbi_cap_buf->list);
711 if (!list_empty(&dev->meta_cap_active)) {
712 meta_cap_buf = list_entry(dev->meta_cap_active.next,
713 struct vivid_buffer, list);
714 list_del(&meta_cap_buf->list);
717 spin_unlock(&dev->slock);
719 if (!vid_cap_buf && !vbi_cap_buf && !meta_cap_buf)
722 f_time = dev->cap_frame_period * dev->vid_cap_seq_count +
723 dev->cap_stream_start + dev->time_wrap_offset;
726 v4l2_ctrl_request_setup(vid_cap_buf->vb.vb2_buf.req_obj.req,
727 &dev->ctrl_hdl_vid_cap);
729 vivid_fillbuff(dev, vid_cap_buf);
730 dprintk(dev, 1, "filled buffer %d\n",
731 vid_cap_buf->vb.vb2_buf.index);
734 if (dev->overlay_cap_owner && dev->fb_cap.base &&
735 dev->fb_cap.fmt.pixelformat == dev->fmt_cap->fourcc)
736 vivid_overlay(dev, vid_cap_buf);
738 v4l2_ctrl_request_complete(vid_cap_buf->vb.vb2_buf.req_obj.req,
739 &dev->ctrl_hdl_vid_cap);
740 vb2_buffer_done(&vid_cap_buf->vb.vb2_buf, dev->dqbuf_error ?
741 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
742 dprintk(dev, 2, "vid_cap buffer %d done\n",
743 vid_cap_buf->vb.vb2_buf.index);
745 vid_cap_buf->vb.vb2_buf.timestamp = f_time;
746 if (!dev->tstamp_src_is_soe)
747 vid_cap_buf->vb.vb2_buf.timestamp += dev->cap_frame_eof_offset;
753 v4l2_ctrl_request_setup(vbi_cap_buf->vb.vb2_buf.req_obj.req,
754 &dev->ctrl_hdl_vbi_cap);
755 if (dev->stream_sliced_vbi_cap)
756 vivid_sliced_vbi_cap_process(dev, vbi_cap_buf);
758 vivid_raw_vbi_cap_process(dev, vbi_cap_buf);
759 v4l2_ctrl_request_complete(vbi_cap_buf->vb.vb2_buf.req_obj.req,
760 &dev->ctrl_hdl_vbi_cap);
761 vb2_buffer_done(&vbi_cap_buf->vb.vb2_buf, dev->dqbuf_error ?
762 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
763 dprintk(dev, 2, "vbi_cap %d done\n",
764 vbi_cap_buf->vb.vb2_buf.index);
766 /* If capturing a VBI, offset by 0.05 */
767 vbi_period = dev->cap_frame_period * 5;
768 do_div(vbi_period, 100);
769 vbi_cap_buf->vb.vb2_buf.timestamp = f_time + dev->cap_frame_eof_offset + vbi_period;
773 v4l2_ctrl_request_setup(meta_cap_buf->vb.vb2_buf.req_obj.req,
774 &dev->ctrl_hdl_meta_cap);
775 vivid_meta_cap_fillbuff(dev, meta_cap_buf, f_time);
776 v4l2_ctrl_request_complete(meta_cap_buf->vb.vb2_buf.req_obj.req,
777 &dev->ctrl_hdl_meta_cap);
778 vb2_buffer_done(&meta_cap_buf->vb.vb2_buf, dev->dqbuf_error ?
779 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
780 dprintk(dev, 2, "meta_cap %d done\n",
781 meta_cap_buf->vb.vb2_buf.index);
782 meta_cap_buf->vb.vb2_buf.timestamp = f_time + dev->cap_frame_eof_offset;
785 dev->dqbuf_error = false;
788 /* Update the test pattern movement counters */
789 tpg_update_mv_count(&dev->tpg, dev->field_cap == V4L2_FIELD_NONE ||
790 dev->field_cap == V4L2_FIELD_ALTERNATE);
793 static int vivid_thread_vid_cap(void *data)
795 struct vivid_dev *dev = data;
796 u64 numerators_since_start;
797 u64 buffers_since_start;
798 u64 next_jiffies_since_start;
799 unsigned long jiffies_since_start;
800 unsigned long cur_jiffies;
801 unsigned wait_jiffies;
803 unsigned denominator;
806 dprintk(dev, 1, "Video Capture Thread Start\n");
810 /* Resets frame counters */
811 dev->cap_seq_offset = 0;
812 dev->cap_seq_count = 0;
813 dev->cap_seq_resync = false;
814 dev->jiffies_vid_cap = jiffies;
815 dev->cap_stream_start = ktime_get_ns();
816 vivid_cap_update_frame_period(dev);
820 if (kthread_should_stop())
823 if (!mutex_trylock(&dev->mutex)) {
828 cur_jiffies = jiffies;
829 if (dev->cap_seq_resync) {
830 dev->jiffies_vid_cap = cur_jiffies;
831 dev->cap_seq_offset = dev->cap_seq_count + 1;
832 dev->cap_seq_count = 0;
833 dev->cap_stream_start += dev->cap_frame_period *
835 vivid_cap_update_frame_period(dev);
836 dev->cap_seq_resync = false;
838 numerator = dev->timeperframe_vid_cap.numerator;
839 denominator = dev->timeperframe_vid_cap.denominator;
841 if (dev->field_cap == V4L2_FIELD_ALTERNATE)
844 /* Calculate the number of jiffies since we started streaming */
845 jiffies_since_start = cur_jiffies - dev->jiffies_vid_cap;
846 /* Get the number of buffers streamed since the start */
847 buffers_since_start = (u64)jiffies_since_start * denominator +
848 (HZ * numerator) / 2;
849 do_div(buffers_since_start, HZ * numerator);
852 * After more than 0xf0000000 (rounded down to a multiple of
853 * 'jiffies-per-day' to ease jiffies_to_msecs calculation)
854 * jiffies have passed since we started streaming reset the
855 * counters and keep track of the sequence offset.
857 if (jiffies_since_start > JIFFIES_RESYNC) {
858 dev->jiffies_vid_cap = cur_jiffies;
859 dev->cap_seq_offset = buffers_since_start;
860 buffers_since_start = 0;
862 dropped_bufs = buffers_since_start + dev->cap_seq_offset - dev->cap_seq_count;
863 dev->cap_seq_count = buffers_since_start + dev->cap_seq_offset;
864 dev->vid_cap_seq_count = dev->cap_seq_count - dev->vid_cap_seq_start;
865 dev->vbi_cap_seq_count = dev->cap_seq_count - dev->vbi_cap_seq_start;
866 dev->meta_cap_seq_count = dev->cap_seq_count - dev->meta_cap_seq_start;
868 vivid_thread_vid_cap_tick(dev, dropped_bufs);
871 * Calculate the number of 'numerators' streamed since we started,
872 * including the current buffer.
874 numerators_since_start = ++buffers_since_start * numerator;
876 /* And the number of jiffies since we started */
877 jiffies_since_start = jiffies - dev->jiffies_vid_cap;
879 mutex_unlock(&dev->mutex);
882 * Calculate when that next buffer is supposed to start
883 * in jiffies since we started streaming.
885 next_jiffies_since_start = numerators_since_start * HZ +
887 do_div(next_jiffies_since_start, denominator);
888 /* If it is in the past, then just schedule asap */
889 if (next_jiffies_since_start < jiffies_since_start)
890 next_jiffies_since_start = jiffies_since_start;
892 wait_jiffies = next_jiffies_since_start - jiffies_since_start;
893 while (jiffies - cur_jiffies < wait_jiffies &&
894 !kthread_should_stop())
897 dprintk(dev, 1, "Video Capture Thread End\n");
901 static void vivid_grab_controls(struct vivid_dev *dev, bool grab)
903 v4l2_ctrl_grab(dev->ctrl_has_crop_cap, grab);
904 v4l2_ctrl_grab(dev->ctrl_has_compose_cap, grab);
905 v4l2_ctrl_grab(dev->ctrl_has_scaler_cap, grab);
908 int vivid_start_generating_vid_cap(struct vivid_dev *dev, bool *pstreaming)
910 dprintk(dev, 1, "%s\n", __func__);
912 if (dev->kthread_vid_cap) {
913 u32 seq_count = dev->cap_seq_count + dev->seq_wrap * 128;
915 if (pstreaming == &dev->vid_cap_streaming)
916 dev->vid_cap_seq_start = seq_count;
917 else if (pstreaming == &dev->vbi_cap_streaming)
918 dev->vbi_cap_seq_start = seq_count;
920 dev->meta_cap_seq_start = seq_count;
925 /* Resets frame counters */
926 tpg_init_mv_count(&dev->tpg);
928 dev->vid_cap_seq_start = dev->seq_wrap * 128;
929 dev->vbi_cap_seq_start = dev->seq_wrap * 128;
930 dev->meta_cap_seq_start = dev->seq_wrap * 128;
932 dev->kthread_vid_cap = kthread_run(vivid_thread_vid_cap, dev,
933 "%s-vid-cap", dev->v4l2_dev.name);
935 if (IS_ERR(dev->kthread_vid_cap)) {
936 int err = PTR_ERR(dev->kthread_vid_cap);
938 dev->kthread_vid_cap = NULL;
939 v4l2_err(&dev->v4l2_dev, "kernel_thread() failed\n");
943 vivid_grab_controls(dev, true);
945 dprintk(dev, 1, "returning from %s\n", __func__);
949 void vivid_stop_generating_vid_cap(struct vivid_dev *dev, bool *pstreaming)
951 dprintk(dev, 1, "%s\n", __func__);
953 if (dev->kthread_vid_cap == NULL)
957 if (pstreaming == &dev->vid_cap_streaming) {
958 /* Release all active buffers */
959 while (!list_empty(&dev->vid_cap_active)) {
960 struct vivid_buffer *buf;
962 buf = list_entry(dev->vid_cap_active.next,
963 struct vivid_buffer, list);
964 list_del(&buf->list);
965 v4l2_ctrl_request_complete(buf->vb.vb2_buf.req_obj.req,
966 &dev->ctrl_hdl_vid_cap);
967 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
968 dprintk(dev, 2, "vid_cap buffer %d done\n",
969 buf->vb.vb2_buf.index);
973 if (pstreaming == &dev->vbi_cap_streaming) {
974 while (!list_empty(&dev->vbi_cap_active)) {
975 struct vivid_buffer *buf;
977 buf = list_entry(dev->vbi_cap_active.next,
978 struct vivid_buffer, list);
979 list_del(&buf->list);
980 v4l2_ctrl_request_complete(buf->vb.vb2_buf.req_obj.req,
981 &dev->ctrl_hdl_vbi_cap);
982 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
983 dprintk(dev, 2, "vbi_cap buffer %d done\n",
984 buf->vb.vb2_buf.index);
988 if (pstreaming == &dev->meta_cap_streaming) {
989 while (!list_empty(&dev->meta_cap_active)) {
990 struct vivid_buffer *buf;
992 buf = list_entry(dev->meta_cap_active.next,
993 struct vivid_buffer, list);
994 list_del(&buf->list);
995 v4l2_ctrl_request_complete(buf->vb.vb2_buf.req_obj.req,
996 &dev->ctrl_hdl_meta_cap);
997 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
998 dprintk(dev, 2, "meta_cap buffer %d done\n",
999 buf->vb.vb2_buf.index);
1003 if (dev->vid_cap_streaming || dev->vbi_cap_streaming ||
1004 dev->meta_cap_streaming)
1007 /* shutdown control thread */
1008 vivid_grab_controls(dev, false);
1009 kthread_stop(dev->kthread_vid_cap);
1010 dev->kthread_vid_cap = NULL;