--- /dev/null
+/*
+ * Copyright (c) 2014 Philippe De Muyter <phdm@macqel.be>
+ * Copyright (c) 2014 William Manley <will@williammanley.net>
+ * Copyright (c) 2011 Peter Zotov <whitequark@whitequark.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "defs.h"
+
+#include <stdint.h>
+#include <sys/ioctl.h>
+#include <linux/videodev2.h>
+/* some historical constants */
+#ifndef V4L2_CID_HCENTER
+#define V4L2_CID_HCENTER (V4L2_CID_BASE+22)
+#endif
+#ifndef V4L2_CID_VCENTER
+#define V4L2_CID_VCENTER (V4L2_CID_BASE+23)
+#endif
+#ifndef V4L2_CID_BAND_STOP_FILTER
+#define V4L2_CID_BAND_STOP_FILTER (V4L2_CID_BASE+33)
+#endif
+
+#include "xlat/v4l2_device_capabilities_flags.h"
+#include "xlat/v4l2_buf_types.h"
+#include "xlat/v4l2_buf_flags.h"
+#include "xlat/v4l2_framesize_types.h"
+#include "xlat/v4l2_frameinterval_types.h"
+#include "xlat/v4l2_fields.h"
+#include "xlat/v4l2_colorspaces.h"
+#include "xlat/v4l2_format_description_flags.h"
+#include "xlat/v4l2_memories.h"
+#include "xlat/v4l2_control_ids.h"
+#include "xlat/v4l2_control_types.h"
+#include "xlat/v4l2_control_flags.h"
+#include "xlat/v4l2_control_classes.h"
+#include "xlat/v4l2_streaming_capabilities.h"
+#include "xlat/v4l2_capture_modes.h"
+#include "xlat/v4l2_input_types.h"
+
+#define FMT_FRACT "%u/%u"
+#define ARGS_FRACT(x) ((x).numerator), ((x).denominator)
+
+#define FMT_RECT "{left=%i, top=%i, width=%i, height=%i}"
+#define ARGS_RECT(x) (x).left, (x).top, (x).width, (x).height
+
+static void print_pixelformat(uint32_t fourcc)
+{
+#if WORDS_BIGENDIAN
+ fourcc = htole32(fourcc);
+#endif
+ tprintf("%.4s", (char*)&fourcc);
+}
+
+static void print_v4l2_format_fmt(const struct v4l2_format *f)
+{
+ tprints("fmt.");
+ switch (f->type) {
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ case V4L2_BUF_TYPE_VIDEO_OUTPUT: {
+ const struct v4l2_pix_format *pix = &f->fmt.pix;
+
+ tprintf("pix={width=%u, height=%u, pixelformat=",
+ pix->width, pix->height);
+ print_pixelformat(pix->pixelformat);
+ tprints(", field=");
+ printxval(v4l2_fields, pix->field, "V4L2_FIELD_???");
+ tprintf(", bytesperline=%u, sizeimage=%u, colorspace=",
+ pix->bytesperline, pix->sizeimage);
+ printxval(v4l2_colorspaces, pix->colorspace,
+ "V4L2_COLORSPACE_???");
+ tprints("}");
+ break;
+ }
+#if HAVE_DECL_V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+ case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: {
+ const struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
+ unsigned int i, max;
+
+ tprintf("pix_mp={width=%u, height=%u, pixelformat=",
+ pix_mp->width, pix_mp->height);
+ print_pixelformat(pix_mp->pixelformat);
+ tprints(", field=");
+ printxval(v4l2_fields, pix_mp->field, "V4L2_FIELD_???");
+ tprints(", colorspace=");
+ printxval(v4l2_colorspaces, pix_mp->colorspace,
+ "V4L2_COLORSPACE_???");
+ tprints("plane_fmt=[");
+ max = pix_mp->num_planes;
+ if (max > VIDEO_MAX_PLANES)
+ max = VIDEO_MAX_PLANES;
+ for (i = 0; i < max; i++) {
+ if (i > 0)
+ tprints(", ");
+ tprintf("{sizeimage=%u, bytesperline=%u}",
+ pix_mp->plane_fmt[i].sizeimage,
+ pix_mp->plane_fmt[i].bytesperline);
+ }
+ tprintf("], num_planes=%u}", (unsigned) pix_mp->num_planes);
+ break;
+ }
+#endif
+
+ /* TODO: Complete this switch statement */
+ case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+ case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
+ tprints("win={???}");
+ break;
+
+ case V4L2_BUF_TYPE_VBI_CAPTURE:
+ case V4L2_BUF_TYPE_VBI_OUTPUT:
+ tprints("vbi={???}");
+ break;
+
+ case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
+ case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
+ tprints("sliced={???}");
+ break;
+
+ default:
+ tprints("???");
+ break;
+ }
+}
+
+int
+v4l2_ioctl(struct tcb *tcp, unsigned long code, long arg)
+{
+ if (!verbose(tcp))
+ return 0;
+
+ switch (code) {
+ case VIDIOC_QUERYCAP: /* decode on exit */ {
+ struct v4l2_capability caps;
+
+ if (entering(tcp) || syserror(tcp) || umove(tcp, arg, &caps) < 0)
+ return 0;
+ tprintf(", {driver=\"%s\", card=\"%s\", bus_info=\"%s\", "
+ "version=%u.%u.%u, capabilities=", caps.driver, caps.card,
+ caps.bus_info, (caps.version >> 16) & 0xFF,
+ (caps.version >> 8) & 0xFF, caps.version & 0xFF);
+ printflags(v4l2_device_capabilities_flags, caps.capabilities,
+ "V4L2_CAP_???");
+#ifdef V4L2_CAP_DEVICE_CAPS
+ tprints(", device_caps=");
+ printflags(v4l2_device_capabilities_flags, caps.device_caps,
+ "V4L2_CAP_???");
+#endif
+ tprints("}");
+ return 1;
+ }
+
+ case VIDIOC_ENUM_FRAMESIZES: /* decode on exit */ {
+ struct v4l2_frmsizeenum s;
+
+ if (entering(tcp) || umove(tcp, arg, &s) < 0)
+ return 0;
+ tprintf(", {index=%u, pixel_format=", s.index);
+ print_pixelformat(s.pixel_format);
+
+ if (!syserror(tcp)) {
+ tprints(", type=");
+ printxval(v4l2_framesize_types, s.type, "V4L2_FRMSIZE_TYPE_???");
+ switch (s.type) {
+ case V4L2_FRMSIZE_TYPE_DISCRETE:
+ tprintf(", discrete={width=%u, height=%u}",
+ s.discrete.width, s.discrete.height);
+ break;
+ case V4L2_FRMSIZE_TYPE_STEPWISE:
+ tprintf(", stepwise={min_width=%u, max_width=%u, "
+ "step_width=%u, min_height=%u, max_height=%u, "
+ "step_height=%u}",
+ s.stepwise.min_width, s.stepwise.max_width,
+ s.stepwise.step_width, s.stepwise.min_height,
+ s.stepwise.max_height, s.stepwise.step_height);
+ break;
+ }
+ }
+ tprints("}");
+ return 1;
+ }
+
+ case VIDIOC_G_FMT:
+ case VIDIOC_S_FMT:
+ case VIDIOC_TRY_FMT: {
+ struct v4l2_format f;
+
+ if (umove(tcp, arg, &f) < 0)
+ return 0;
+ if (entering(tcp)) {
+ tprints(", {type=");
+ printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
+ }
+ if ((entering(tcp) && code != VIDIOC_G_FMT)
+ || (exiting(tcp) && !syserror(tcp))) {
+ tprints(exiting(tcp) && code != VIDIOC_G_FMT ? " => " : ", ");
+ print_v4l2_format_fmt(&f);
+ }
+ if (exiting(tcp))
+ tprints("}");
+ return 1;
+ }
+
+ case VIDIOC_ENUM_FMT: {
+ struct v4l2_fmtdesc f;
+
+ if (entering(tcp) || umove(tcp, arg, &f) < 0)
+ return 0;
+
+ tprintf(", {index=%u", f.index);
+ if (!syserror(tcp)) {
+ tprints(", type=");
+ printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
+ tprints(", flags=");
+ printflags(v4l2_format_description_flags, f.flags,
+ "V4L2_FMT_FLAG_???");
+ tprintf(", description=\"%s\", pixelformat=",
+ f.description);
+ print_pixelformat(f.pixelformat);
+ }
+ tprints("}");
+ return 1;
+ }
+
+ case VIDIOC_G_PARM:
+ case VIDIOC_S_PARM: {
+ struct v4l2_streamparm s;
+
+ if (entering(tcp) && code == VIDIOC_G_PARM)
+ return 1;
+ if (exiting(tcp) && syserror(tcp))
+ return code == VIDIOC_S_PARM;
+ if (umove(tcp, arg, &s) < 0)
+ return 0;
+ if (entering(tcp)) {
+ tprints(", {type=");
+ printxval(v4l2_buf_types, s.type, "V4L2_BUF_TYPE_???");
+ }
+
+ tprints(exiting(tcp) && code == VIDIOC_S_PARM ? " => {" : ", {");
+ if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+ struct v4l2_captureparm *cap = &s.parm.capture;
+
+ tprints("capability=");
+ printflags(v4l2_streaming_capabilities,
+ cap->capability, "V4L2_CAP_???");
+
+ tprints(", capturemode=");
+ printflags(v4l2_capture_modes,
+ cap->capturemode, "V4L2_MODE_???");
+
+ tprintf(", timeperframe=" FMT_FRACT,
+ ARGS_FRACT(cap->timeperframe));
+
+ tprintf(", extendedmode=%u, readbuffers=%u",
+ cap->extendedmode,
+ cap->readbuffers);
+ } else
+ tprints("...");
+ tprints("}");
+ if (exiting(tcp))
+ tprints("}");
+ return 1;
+ }
+
+ case VIDIOC_QUERYCTRL: {
+ struct v4l2_queryctrl c;
+
+ if (umove(tcp, arg, &c) < 0)
+ return 0;
+ /* 'id' field must be printed :
+ * on enter
+ * on exit if !syserror(tcp) && V4L2_CTRL_FLAG_NEXT_CTRL was set
+ */
+ if (entering(tcp)
+ || (exiting(tcp) && tcp->auxstr && !syserror(tcp))) {
+ tprints(exiting(tcp) ? " => " : ", {id=");
+ tcp->auxstr = (c.id & V4L2_CTRL_FLAG_NEXT_CTRL) ? "" : NULL;
+ if (tcp->auxstr) {
+ tprints("V4L2_CTRL_FLAG_NEXT_CTRL|");
+ c.id &= ~V4L2_CTRL_FLAG_NEXT_CTRL;
+ }
+ printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
+ }
+ if (exiting(tcp)) {
+ if (!syserror(tcp)) {
+ tprints(", type=");
+ printxval(v4l2_control_types, c.type,
+ "V4L2_CTRL_TYPE_???");
+ tprintf(", name=\"%s\", minimum=%i, maximum=%i, step=%i, "
+ "default_value=%i, flags=",
+ c.name, c.minimum, c.maximum,
+ c.step, c.default_value);
+ printflags(v4l2_control_flags, c.flags,
+ "V4L2_CTRL_FLAG_???");
+ }
+ tprints("}");
+ }
+ return 1;
+ }
+
+ case VIDIOC_G_CTRL:
+ case VIDIOC_S_CTRL: {
+ struct v4l2_control c;
+
+ if (entering(tcp) || umove(tcp, arg, &c) < 0)
+ return 0;
+ tprints(", {id=");
+ printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
+ if (!syserror(tcp) || code != VIDIOC_G_CTRL)
+ tprintf(", value=%i", c.value);
+ tprints("}");
+ return 1;
+ }
+
+ case VIDIOC_S_EXT_CTRLS:
+ case VIDIOC_TRY_EXT_CTRLS:
+ case VIDIOC_G_EXT_CTRLS: {
+ struct v4l2_ext_controls c;
+ unsigned int n;
+ bool must_print_values;
+
+ if (entering(tcp) && code == VIDIOC_G_EXT_CTRLS)
+ return 0;
+ if (exiting(tcp) && syserror(tcp) && code != VIDIOC_G_EXT_CTRLS)
+ return 0;
+ must_print_values = ((entering(tcp) && code != VIDIOC_G_EXT_CTRLS)
+ || (exiting(tcp) && !syserror(tcp)));
+ if (umove(tcp, arg, &c) < 0)
+ return 0;
+ tprints(code != VIDIOC_G_EXT_CTRLS && exiting(tcp) ? " => " : ", ");
+ tprints("{ctrl_class=");
+ printxval(v4l2_control_classes, c.ctrl_class,
+ "V4L2_CTRL_CLASS_???");
+ tprintf(", count=%u", c.count);
+ if (exiting(tcp) && syserror(tcp))
+ tprintf(", error_idx=%u", c.error_idx);
+ tprints(", controls=[");
+ for (n = 0; n < c.count; ++n) {
+ struct v4l2_ext_control ctrl;
+
+ if (n > 0)
+ tprints(", ");
+ if (umove(tcp, (long) (c.controls + n), &ctrl) < 0)
+ break;
+ if (abbrev(tcp) && n == 2) {
+ tprints("...");
+ break;
+ }
+ tprints("{id=");
+ printxval(v4l2_control_ids, ctrl.id, "V4L2_CID_???");
+#if HAVE_DECL_V4L2_CTRL_TYPE_STRING
+ tprintf(", size=%u", ctrl.size);
+ if (ctrl.size > 0) {
+ if (must_print_values) {
+ tprints(", string=");
+ printstr(tcp, (long) ctrl.string, ctrl.size);
+ }
+ } else
+#endif
+ {
+ if (must_print_values) {
+ tprintf(", value=%i, value64=%lli", ctrl.value,
+ ctrl.value64);
+ }
+ }
+ tprints("}");
+ }
+ tprints("]}");
+ return 1;
+ }
+
+ case VIDIOC_ENUMSTD: {
+ struct v4l2_standard s;
+
+ if (umove(tcp, arg, &s) < 0)
+ return 0;
+ if (entering(tcp))
+ tprintf(", {index=%i", s.index);
+ else {
+ if (!syserror(tcp)) {
+ tprintf(", name=\"%s\"", s.name);
+ tprintf(", frameperiod=" FMT_FRACT, ARGS_FRACT(s.frameperiod));
+ tprintf(", framelines=%i", s.framelines);
+ }
+ tprints("}");
+ }
+ return 1;
+ }
+
+ case VIDIOC_G_STD:
+ case VIDIOC_S_STD: {
+ v4l2_std_id s;
+
+ if (code == VIDIOC_G_STD && exiting(tcp) && syserror(tcp))
+ return 0;
+ if (umove(tcp, arg, &s) < 0)
+ return 0;
+ if ((code == VIDIOC_S_STD) == entering(tcp))
+ tprintf(", std=%#llx", s);
+ return 1;
+ }
+
+ case VIDIOC_ENUMINPUT: {
+ struct v4l2_input i;
+
+ if (entering(tcp) || umove(tcp, arg, &i) < 0)
+ return 0;
+ tprintf(", {index=%i", i.index);
+ if (!syserror(tcp)) {
+ tprintf(", name=\"%s\", type=", i.name);
+ printxval(v4l2_input_types, i.type,
+ "V4L2_INPUT_TYPE_???");
+ }
+ tprints("}");
+ return 1;
+ }
+
+ case VIDIOC_G_INPUT:
+ case VIDIOC_S_INPUT: {
+ int index;
+
+ if (entering(tcp) || syserror(tcp) || umove(tcp, arg, &index) < 0)
+ return 0;
+
+ tprintf(", index=%i", index);
+ return 1;
+ }
+
+ case VIDIOC_ENUM_FRAMEINTERVALS: {
+ struct v4l2_frmivalenum f;
+
+ if (entering(tcp) || umove(tcp, arg, &f) < 0)
+ return 0;
+ tprintf(", {index=%i, pixel_format=", f.index);
+ print_pixelformat(f.pixel_format);
+ tprintf(", width=%u, height=%u", f.width, f.height);
+ if (!syserror(tcp)) {
+ tprints(", type=");
+ printxval(v4l2_frameinterval_types, f.type,
+ "V4L2_FRMIVAL_TYPE_???");
+ switch (f.type) {
+ case V4L2_FRMIVAL_TYPE_DISCRETE:
+ tprintf(", discrete=" FMT_FRACT,
+ ARGS_FRACT(f.discrete));
+ break;
+ case V4L2_FRMIVAL_TYPE_STEPWISE:
+ case V4L2_FRMSIZE_TYPE_CONTINUOUS:
+ tprintf(", stepwise={min=" FMT_FRACT ", max="
+ FMT_FRACT ", step=" FMT_FRACT "}",
+ ARGS_FRACT(f.stepwise.min),
+ ARGS_FRACT(f.stepwise.max),
+ ARGS_FRACT(f.stepwise.step));
+ break;
+ }
+ }
+ tprints("}");
+ return 1;
+ }
+
+ case VIDIOC_CROPCAP: {
+ struct v4l2_cropcap c;
+
+ if (entering(tcp) || umove(tcp, arg, &c) < 0)
+ return 0;
+ tprints(", type=");
+ printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
+ if (syserror(tcp))
+ return 1;
+ tprintf(", bounds=" FMT_RECT ", defrect=" FMT_RECT ", "
+ "pixelaspect=" FMT_FRACT, ARGS_RECT(c.bounds),
+ ARGS_RECT(c.defrect), ARGS_FRACT(c.pixelaspect));
+ return 1;
+ }
+
+ case VIDIOC_G_FBUF:
+ case VIDIOC_S_FBUF: {
+ struct v4l2_framebuffer b;
+
+ if (syserror(tcp) && code == VIDIOC_G_FBUF)
+ return 0;
+ if (entering(tcp) || umove(tcp, arg, &b) < 0)
+ return 0;
+ tprintf(", {capability=%x, flags=%x, base=%p}",
+ b.capability, b.flags, b.base);
+ return 1;
+ }
+
+ case VIDIOC_REQBUFS: {
+ struct v4l2_requestbuffers reqbufs;
+
+ if (umove(tcp, arg, &reqbufs) < 0)
+ return 0;
+ if (entering(tcp)) {
+ tprintf(", {count=%u, type=", reqbufs.count);
+ printxval(v4l2_buf_types, reqbufs.type, "V4L2_BUF_TYPE_???");
+ tprints(", memory=");
+ printxval(v4l2_memories, reqbufs.memory, "V4L2_MEMORY_???");
+ tprints("}");
+ return 1;
+ } else if (syserror(tcp))
+ return 1;
+ else {
+ static char outstr[sizeof("{count=}") + sizeof(int) * 3];
+
+ sprintf(outstr, "{count=%u}", reqbufs.count);
+ tcp->auxstr = outstr;
+ return 1 + RVAL_STR;
+ }
+ }
+
+ case VIDIOC_QUERYBUF:
+ case VIDIOC_QBUF:
+ case VIDIOC_DQBUF: {
+ struct v4l2_buffer b;
+
+ if (umove(tcp, arg, &b) < 0)
+ return 0;
+ if (entering(tcp)) {
+ tprints(", {type=");
+ printxval(v4l2_buf_types, b.type, "V4L2_BUF_TYPE_???");
+ if (code != VIDIOC_DQBUF)
+ tprintf(", index=%u", b.index);
+ } else {
+ if (!syserror(tcp)) {
+ if (code == VIDIOC_DQBUF)
+ tprintf(", index=%u", b.index);
+ tprints(", memory=");
+ printxval(v4l2_memories, b.memory, "V4L2_MEMORY_???");
+
+ if (b.memory == V4L2_MEMORY_MMAP) {
+ tprintf(", m.offset=%#x", b.m.offset);
+ } else if (b.memory == V4L2_MEMORY_USERPTR) {
+ tprintf(", m.userptr=%#lx", b.m.userptr);
+ }
+
+ tprintf(", length=%u, bytesused=%u, flags=",
+ b.length, b.bytesused);
+ printflags(v4l2_buf_flags, b.flags, "V4L2_BUF_FLAG_???");
+ if (code == VIDIOC_DQBUF)
+ tprintf(", timestamp = {%lu.%06lu}",
+ b.timestamp.tv_sec,
+ b.timestamp.tv_usec);
+ tprints(", ...");
+ }
+ tprints("}");
+ }
+ return 1;
+ }
+
+ case VIDIOC_STREAMON:
+ case VIDIOC_STREAMOFF: {
+ int type;
+
+ if (umove(tcp, arg, &type) < 0)
+ return 0;
+ if (entering(tcp)) {
+ tprints(", ");
+ printxval(v4l2_buf_types, type, "V4L2_BUF_TYPE_???");
+ }
+ return 1;
+ }
+
+ default: /* decode on exit */
+ return 0;
+ }
+}
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