/
v4l2.c
1194 lines (1015 loc) · 29 KB
/
v4l2.c
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/*
* 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>
* Copyright (c) 2014-2020 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#include "static_assert.h"
#define CHECK_V4L2_STRUCT_SIZE(s_) \
static_assert(sizeof(struct s_) == sizeof(struct_##s_), \
"Unexpected struct " #s_ " size")
#define CHECK_V4L2_STRUCT_SIZE_LE(s_) \
static_assert(sizeof(struct s_) <= sizeof(struct_##s_), \
"Unexpected struct " #s_ " size, " \
"please update the decoder")
#define CHECK_V4L2_RESERVED_SIZE(s_) \
static_assert(sizeof_field(struct s_, reserved) \
>= sizeof_field(struct_##s_, reserved), \
"Unexpected struct " #s_ ".reserved size, " \
"please update the decoder")
#define CHECK_V4L2_STRUCT_RESERVED_SIZE(s_) \
CHECK_V4L2_STRUCT_SIZE(s_); \
CHECK_V4L2_RESERVED_SIZE(s_)
#include DEF_MPERS_TYPE(kernel_v4l2_buffer_t)
#include DEF_MPERS_TYPE(struct_v4l2_clip)
#include DEF_MPERS_TYPE(struct_v4l2_create_buffers)
#include DEF_MPERS_TYPE(struct_v4l2_ext_control)
#include DEF_MPERS_TYPE(struct_v4l2_ext_controls)
#include DEF_MPERS_TYPE(struct_v4l2_format)
#include DEF_MPERS_TYPE(struct_v4l2_framebuffer)
#include DEF_MPERS_TYPE(struct_v4l2_input)
#include DEF_MPERS_TYPE(struct_v4l2_standard)
#include "types/v4l2.h"
#include "kernel_v4l2_types.h"
CHECK_V4L2_STRUCT_RESERVED_SIZE(v4l2_capability);
CHECK_V4L2_STRUCT_SIZE_LE(v4l2_pix_format);
#ifdef HAVE_STRUCT_V4L2_PLANE_PIX_FORMAT
CHECK_V4L2_STRUCT_RESERVED_SIZE(v4l2_plane_pix_format);
#endif
#ifdef HAVE_STRUCT_V4L2_PIX_FORMAT_MPLANE
CHECK_V4L2_STRUCT_RESERVED_SIZE(v4l2_pix_format_mplane);
#endif
CHECK_V4L2_STRUCT_SIZE(v4l2_clip);
CHECK_V4L2_STRUCT_SIZE_LE(v4l2_window);
CHECK_V4L2_STRUCT_RESERVED_SIZE(v4l2_vbi_format);
CHECK_V4L2_STRUCT_RESERVED_SIZE(v4l2_sliced_vbi_format);
CHECK_V4L2_STRUCT_RESERVED_SIZE(v4l2_sliced_vbi_cap);
#ifdef HAVE_STRUCT_V4L2_SDR_FORMAT
CHECK_V4L2_STRUCT_RESERVED_SIZE(v4l2_sdr_format);
#endif
#ifdef HAVE_STRUCT_V4L2_META_FORMAT
CHECK_V4L2_STRUCT_SIZE(v4l2_meta_format);
#endif
CHECK_V4L2_STRUCT_SIZE(v4l2_format);
#ifdef HAVE_STRUCT_V4L2_FRMSIZEENUM
CHECK_V4L2_STRUCT_RESERVED_SIZE(v4l2_frmsizeenum);
#endif
#ifdef HAVE_STRUCT_V4L2_FRMIVALENUM
CHECK_V4L2_STRUCT_RESERVED_SIZE(v4l2_frmivalenum);
#endif
#ifdef HAVE_STRUCT_V4L2_CREATE_BUFFERS
CHECK_V4L2_STRUCT_RESERVED_SIZE(v4l2_create_buffers);
#endif
#include MPERS_DEFS
#include "print_fields.h"
#include "print_utils.h"
#include "xstring.h"
/* v4l2_fourcc_be was added by Linux commit v3.18-rc1~101^2^2~127 */
#ifndef v4l2_fourcc_be
# define v4l2_fourcc_be(a, b, c, d) (v4l2_fourcc(a, b, c, d) | (1U << 31))
#endif
#ifndef VIDEO_MAX_PLANES
# define VIDEO_MAX_PLANES 8
#endif
#define FMT_FRACT "%u/%u"
#define ARGS_FRACT(x) ((x).numerator), ((x).denominator)
#define FMT_RECT "{left=%d, top=%d, width=%u, height=%u}"
#define ARGS_RECT(x) (x).left, (x).top, (x).width, (x).height
#include "xlat/v4l2_pix_fmts.h"
#include "xlat/v4l2_sdr_fmts.h"
#define XLAT_MACROS_ONLY
# include "xlat/v4l2_ioctl_cmds.h"
#undef XLAT_MACROS_ONLY
#undef VIDIOC_QUERYBUF
#define VIDIOC_QUERYBUF _IOWR('V', 9, kernel_v4l2_buffer_t)
#undef VIDIOC_QBUF
#define VIDIOC_QBUF _IOWR('V', 15, kernel_v4l2_buffer_t)
#undef VIDIOC_DQBUF
#define VIDIOC_DQBUF _IOWR('V', 17, kernel_v4l2_buffer_t)
#undef VIDIOC_PREPARE_BUF
#define VIDIOC_PREPARE_BUF _IOWR('V', 93, kernel_v4l2_buffer_t)
static void
print_pixelformat(uint32_t fourcc, const struct xlat *xlat)
{
if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_RAW) {
tprintf("%#x", fourcc);
return;
}
unsigned char a[] = {
(unsigned char) fourcc,
(unsigned char) (fourcc >> 8),
(unsigned char) (fourcc >> 16),
(unsigned char) (fourcc >> 24),
};
unsigned int i;
tprints("v4l2_fourcc(");
/* Generic char array printing routine. */
for (i = 0; i < ARRAY_SIZE(a); ++i) {
unsigned char c = a[i];
if (i)
tprints(", ");
if (c == '\'' || c == '\\') {
char sym[] = {
'\'',
'\\',
c,
'\'',
'\0'
};
tprints(sym);
} else if (is_print(c)) {
char sym[] = {
'\'',
c,
'\'',
'\0'
};
tprints(sym);
} else {
char hex[] = {
BYTE_HEX_CHARS_PRINTF_QUOTED(c),
'\0'
};
tprints(hex);
}
}
tprints(")");
if (xlat) {
const char *pixfmt_name = xlookup(xlat, fourcc);
if (pixfmt_name)
tprints_comment(pixfmt_name);
}
}
#include "xlat/v4l2_device_capabilities_flags.h"
static int
print_v4l2_capability(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct_v4l2_capability caps;
if (entering(tcp))
return 0;
tprints(", ");
if (umove_or_printaddr(tcp, arg, &caps))
return RVAL_IOCTL_DECODED;
PRINT_FIELD_CSTRING("{", caps, driver);
PRINT_FIELD_CSTRING(", ", caps, card);
PRINT_FIELD_CSTRING(", ", caps, bus_info);
tprintf(", version=");
print_kernel_version(caps.version);
tprints(", capabilities=");
printflags(v4l2_device_capabilities_flags, caps.capabilities,
"V4L2_CAP_???");
if (caps.device_caps) {
tprints(", device_caps=");
printflags(v4l2_device_capabilities_flags, caps.device_caps,
"V4L2_CAP_???");
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_buf_types.h"
#include "xlat/v4l2_format_description_flags.h"
static int
print_v4l2_fmtdesc(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct v4l2_fmtdesc f;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &f))
return RVAL_IOCTL_DECODED;
tprintf("{index=%u, type=", f.index);
printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &f)) {
tprints(", flags=");
printflags(v4l2_format_description_flags, f.flags,
"V4L2_FMT_FLAG_???");
PRINT_FIELD_CSTRING(", ", f, description);
tprints(", pixelformat=");
print_pixelformat(f.pixelformat, v4l2_pix_fmts);
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_fields.h"
#include "xlat/v4l2_colorspaces.h"
#include "xlat/v4l2_vbi_flags.h"
#include "xlat/v4l2_sliced_flags.h"
static bool
print_v4l2_clip(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
{
const struct_v4l2_clip *p = elem_buf;
tprintf(FMT_RECT, ARGS_RECT(p->c));
return true;
}
static bool
print_v4l2_format_fmt(struct tcb *const tcp, const char *prefix,
const struct_v4l2_format *f)
{
bool ret = true;
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
tprints(prefix);
tprintf("fmt.pix={width=%u, height=%u, pixelformat=",
f->fmt.pix.width, f->fmt.pix.height);
print_pixelformat(f->fmt.pix.pixelformat, v4l2_pix_fmts);
tprints(", field=");
printxval(v4l2_fields, f->fmt.pix.field, "V4L2_FIELD_???");
tprintf(", bytesperline=%u, sizeimage=%u, colorspace=",
f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
printxval(v4l2_colorspaces, f->fmt.pix.colorspace,
"V4L2_COLORSPACE_???");
tprints("}");
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: {
unsigned int i, max;
tprints(prefix);
tprintf("fmt.pix_mp={width=%u, height=%u, pixelformat=",
f->fmt.pix_mp.width, f->fmt.pix_mp.height);
print_pixelformat(f->fmt.pix_mp.pixelformat, v4l2_pix_fmts);
tprints(", field=");
printxval(v4l2_fields, f->fmt.pix_mp.field, "V4L2_FIELD_???");
tprints(", colorspace=");
printxval(v4l2_colorspaces, f->fmt.pix_mp.colorspace,
"V4L2_COLORSPACE_???");
tprints(", plane_fmt=[");
max = f->fmt.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}",
f->fmt.pix_mp.plane_fmt[i].sizeimage,
f->fmt.pix_mp.plane_fmt[i].bytesperline);
}
tprintf("], num_planes=%u}",
(unsigned) f->fmt.pix_mp.num_planes);
break;
}
/* OUTPUT_OVERLAY since Linux v2.6.22-rc1~1118^2~179 */
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
case V4L2_BUF_TYPE_VIDEO_OVERLAY: {
struct_v4l2_clip clip;
tprints(prefix);
tprintf("fmt.win={left=%d, top=%d, width=%u, height=%u, field=",
ARGS_RECT(f->fmt.win.w));
printxval(v4l2_fields, f->fmt.win.field, "V4L2_FIELD_???");
tprintf(", chromakey=%#x, clips=", f->fmt.win.chromakey);
ret = print_array(tcp, ptr_to_kulong(f->fmt.win.clips),
f->fmt.win.clipcount, &clip, sizeof(clip),
tfetch_mem, print_v4l2_clip, 0);
tprintf(", clipcount=%u, bitmap=", f->fmt.win.clipcount);
printaddr(ptr_to_kulong(f->fmt.win.bitmap));
if (f->fmt.win.global_alpha)
tprintf(", global_alpha=%#x", f->fmt.win.global_alpha);
tprints("}");
break;
}
case V4L2_BUF_TYPE_VBI_CAPTURE:
case V4L2_BUF_TYPE_VBI_OUTPUT:
tprints(prefix);
tprintf("fmt.vbi={sampling_rate=%u, offset=%u, "
"samples_per_line=%u, sample_format=",
f->fmt.vbi.sampling_rate, f->fmt.vbi.offset,
f->fmt.vbi.samples_per_line);
print_pixelformat(f->fmt.vbi.sample_format, v4l2_pix_fmts);
tprintf(", start=[%d, %d], count=[%u, %u], ",
f->fmt.vbi.start[0], f->fmt.vbi.start[1],
f->fmt.vbi.count[0], f->fmt.vbi.count[1]);
tprints("flags=");
printflags(v4l2_vbi_flags, f->fmt.vbi.flags, "V4L2_VBI_???");
tprints("}");
break;
/* both since Linux v2.6.14-rc2~64 */
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: {
unsigned int i, j;
tprints(prefix);
tprints("fmt.sliced={service_set=");
printxval(v4l2_sliced_flags, f->fmt.sliced.service_set,
"V4L2_SLICED_???");
tprintf(", io_size=%u, service_lines=[",
f->fmt.sliced.io_size);
for (i = 0; i < ARRAY_SIZE(f->fmt.sliced.service_lines); i++) {
if (i > 0)
tprints(", ");
tprints("[");
for (j = 0;
j < ARRAY_SIZE(f->fmt.sliced.service_lines[0]);
j++) {
if (j > 0)
tprints(", ");
tprintf("%#x",
f->fmt.sliced.service_lines[i][j]);
}
tprints("]");
}
tprints("]}");
break;
}
/* since Linux v4.4-rc1~118^2~14 */
case V4L2_BUF_TYPE_SDR_OUTPUT:
/* since Linux v3.15-rc1~85^2~213 */
case V4L2_BUF_TYPE_SDR_CAPTURE:
tprints(prefix);
tprints("fmt.sdr={pixelformat=");
print_pixelformat(f->fmt.sdr.pixelformat, v4l2_sdr_fmts);
if (f->fmt.sdr.buffersize)
tprintf(", buffersize=%u",
f->fmt.sdr.buffersize);
tprints("}");
break;
default:
return false;
}
return ret;
}
static int
print_v4l2_format(struct tcb *const tcp, const kernel_ulong_t arg,
const bool is_get)
{
struct_v4l2_format f;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &f))
return RVAL_IOCTL_DECODED;
tprints("{type=");
printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
if (is_get)
return 0;
if (!print_v4l2_format_fmt(tcp, ", ", &f)) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &f))
print_v4l2_format_fmt(tcp, is_get ? ", " : "} => {", &f);
tprints("}");
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_memories.h"
static int
print_v4l2_requestbuffers(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct v4l2_requestbuffers reqbufs;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &reqbufs))
return RVAL_IOCTL_DECODED;
tprintf("{type=");
printxval(v4l2_buf_types, reqbufs.type, "V4L2_BUF_TYPE_???");
tprints(", memory=");
printxval(v4l2_memories, reqbufs.memory, "V4L2_MEMORY_???");
tprintf(", count=%u", reqbufs.count);
return 0;
}
if (!syserror(tcp)) {
tprints(" => ");
if (!umove(tcp, arg, &reqbufs))
tprintf("%u", reqbufs.count);
else
tprints("???");
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_buf_flags.h"
#include "xlat/v4l2_buf_flags_ts_type.h"
#include "xlat/v4l2_buf_flags_ts_src.h"
#define XLAT_MACROS_ONLY
# include "xlat/v4l2_buf_flags_masks.h"
#undef XLAT_MACROS_ONLY
static void
print_v4l2_buffer_flags(uint32_t val)
{
const uint32_t ts_type = val & V4L2_BUF_FLAG_TIMESTAMP_MASK;
const uint32_t ts_src = val & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
const uint32_t flags = val & ~ts_type & ~ts_src;
if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_RAW) {
tprintf("%#" PRIx32, val);
return;
}
if (flags) {
printflags(v4l2_buf_flags, flags, "V4L2_BUF_FLAG_???");
tprints("|");
}
printxval(v4l2_buf_flags_ts_type, ts_type,
"V4L2_BUF_FLAG_TIMESTAMP_???");
tprints("|");
printxval(v4l2_buf_flags_ts_src, ts_src,
"V4L2_BUF_FLAG_TSTAMP_SRC_???");
}
static int
print_v4l2_buffer(struct tcb *const tcp, const unsigned int code,
const kernel_ulong_t arg)
{
kernel_v4l2_buffer_t b;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &b))
return RVAL_IOCTL_DECODED;
tprints("{type=");
printxval(v4l2_buf_types, b.type, "V4L2_BUF_TYPE_???");
if (code != VIDIOC_DQBUF)
tprintf(", index=%u", b.index);
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &b)) {
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) {
tprints(", m.userptr=");
printaddr(b.m.userptr);
}
tprintf(", length=%u, bytesused=%u, flags=",
b.length, b.bytesused);
print_v4l2_buffer_flags(b.flags);
if (code == VIDIOC_DQBUF) {
tprints(", timestamp=");
kernel_timeval64_t t;
if (sizeof(t.tv_usec) == sizeof(b.timestamp.tv_usec)) {
print_timeval64_data_size(&b.timestamp,
sizeof(b.timestamp));
} else {
t.tv_sec = b.timestamp.tv_sec;
t.tv_usec = zero_extend_signed_to_ull(b.timestamp.tv_usec);
print_timeval64_data_size(&t, sizeof(t));
}
}
tprints(", ...");
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
static int
print_v4l2_framebuffer(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct_v4l2_framebuffer b;
tprints(", ");
if (!umove_or_printaddr(tcp, arg, &b)) {
tprintf("{capability=%#x, flags=%#x, base=",
b.capability, b.flags);
printaddr(ptr_to_kulong(b.base));
tprints("}");
}
return RVAL_IOCTL_DECODED;
}
static int
print_v4l2_buf_type(struct tcb *const tcp, const kernel_ulong_t arg)
{
int type;
tprints(", ");
if (!umove_or_printaddr(tcp, arg, &type)) {
tprints("[");
printxval(v4l2_buf_types, type, "V4L2_BUF_TYPE_???");
tprints("]");
}
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_streaming_capabilities.h"
#include "xlat/v4l2_capture_modes.h"
static int
print_v4l2_streamparm(struct tcb *const tcp, const kernel_ulong_t arg,
const bool is_get)
{
struct v4l2_streamparm s;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &s))
return RVAL_IOCTL_DECODED;
tprints("{type=");
printxval(v4l2_buf_types, s.type, "V4L2_BUF_TYPE_???");
switch (s.type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (is_get)
return 0;
tprints(", ");
break;
default:
tprints("}");
return RVAL_IOCTL_DECODED;
}
} else {
if (syserror(tcp) || umove(tcp, arg, &s) < 0) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
tprints(is_get ? ", " : "} => {");
}
if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
tprints("parm.capture={capability=");
printflags(v4l2_streaming_capabilities,
s.parm.capture.capability, "V4L2_CAP_???");
tprints(", capturemode=");
printflags(v4l2_capture_modes,
s.parm.capture.capturemode, "V4L2_MODE_???");
tprintf(", timeperframe=" FMT_FRACT,
ARGS_FRACT(s.parm.capture.timeperframe));
tprintf(", extendedmode=%#x, readbuffers=%u}",
s.parm.capture.extendedmode,
s.parm.capture.readbuffers);
} else {
tprints("parm.output={capability=");
printflags(v4l2_streaming_capabilities,
s.parm.output.capability, "V4L2_CAP_???");
tprintf(", outputmode=");
printflags(v4l2_capture_modes,
s.parm.output.outputmode, "V4L2_MODE_???");
tprintf(", timeperframe=" FMT_FRACT,
ARGS_FRACT(s.parm.output.timeperframe));
tprintf(", extendedmode=%#x, writebuffers=%u}",
s.parm.output.extendedmode,
s.parm.output.writebuffers);
}
if (entering(tcp)) {
return 0;
} else {
tprints("}");
return RVAL_IOCTL_DECODED;
}
}
static int
print_v4l2_standard(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct_v4l2_standard s;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &s))
return RVAL_IOCTL_DECODED;
tprintf("{index=%u", s.index);
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &s)) {
PRINT_FIELD_CSTRING(", ", s, name);
tprintf(", frameperiod=" FMT_FRACT,
ARGS_FRACT(s.frameperiod));
tprintf(", framelines=%u", s.framelines);
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_input_types.h"
static int
print_v4l2_input(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct_v4l2_input i;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &i))
return RVAL_IOCTL_DECODED;
tprintf("{index=%u", i.index);
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &i)) {
PRINT_FIELD_CSTRING(", ", i, name);
tprints(", type=");
printxval(v4l2_input_types, i.type, "V4L2_INPUT_TYPE_???");
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
/*
* We include it here and not before print_v4l2_ext_controls as we need
* V4L2_CTRL_CLASS_* definitions for V4L2_CID_*_BASE ones.
*/
#include "xlat/v4l2_control_classes.h"
#include "xlat/v4l2_control_id_bases.h"
#include "xlat/v4l2_control_ids.h"
#include "xlat/v4l2_control_query_flags.h"
static void
print_v4l2_cid(uint32_t cid, bool next_flags)
{
if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_RAW) {
tprintf("%#x", cid);
return;
}
if (next_flags) {
uint32_t flags = cid & v4l2_control_query_flags->flags_mask;
if (flags) {
printflags(v4l2_control_query_flags, flags,
"V4L2_CTRL_FLAG_NEXT_???");
tprints("|");
cid &= ~flags;
}
}
const char *id_name = xlookup(v4l2_control_ids, cid);
if (id_name) {
print_xlat_ex(cid, id_name, XLAT_STYLE_DEFAULT);
return;
}
uint64_t class_id = cid;
const char *class_str = xlookup_le(v4l2_control_classes, &class_id);
if (!class_str || (cid - class_id) >= 0x10000) {
print_xlat_ex(cid, "V4L2_CID_???", PXF_DEFAULT_STR);
return;
}
/*
* As of now, the longest control class name is V4L2_CTRL_CLASS_IMAGE_SOURCE,
* of 28 characters long.
*/
char tmp_str[64 + sizeof("+%#") + sizeof(class_id) * 2];
xsprintf(tmp_str, "%s+%#" PRIx64, class_str, cid - class_id);
print_xlat_ex(cid, tmp_str, XLAT_STYLE_DEFAULT);
}
static int
print_v4l2_control(struct tcb *const tcp, const kernel_ulong_t arg,
const bool is_get)
{
struct v4l2_control c;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &c))
return RVAL_IOCTL_DECODED;
tprints("{id=");
print_v4l2_cid(c.id, false);
if (!is_get)
tprintf(", value=%d", c.value);
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &c)) {
tprintf("%s%d", is_get ? ", value=" : " => ", c.value);
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
#include "xlat/v4l2_tuner_types.h"
#include "xlat/v4l2_tuner_capabilities.h"
#include "xlat/v4l2_tuner_rxsubchanses.h"
#include "xlat/v4l2_tuner_audmodes.h"
static int
print_v4l2_tuner(struct tcb *const tcp, const kernel_ulong_t arg,
const bool is_get)
{
struct v4l2_tuner c;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &c))
return RVAL_IOCTL_DECODED;
tprintf("{index=%u", c.index);
if (is_get)
return 0;
tprints(", ");
} else {
if (syserror(tcp) || umove(tcp, arg, &c) < 0) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
tprints(is_get ? ", " : "} => {");
}
PRINT_FIELD_CSTRING("", c, name);
tprints(", type=");
printxval(v4l2_tuner_types, c.type, "V4L2_TUNER_???");
tprints(", capability=");
printflags(v4l2_tuner_capabilities, c.capability,
"V4L2_TUNER_CAP_???");
tprintf(", rangelow=%u, rangehigh=%u, rxsubchans=",
c.rangelow, c.rangehigh);
printflags(v4l2_tuner_rxsubchanses, c.rxsubchans,
"V4L2_TUNER_SUB_???");
tprints(", audmode=");
printxval(v4l2_tuner_audmodes, c.audmode,
"V4L2_TUNER_MODE_???");
tprintf(", signal=%d, afc=%d", c.signal, c.afc);
if (entering(tcp)) {
return 0;
} else {
tprints("}");
return RVAL_IOCTL_DECODED;
}
}
#include "xlat/v4l2_control_types.h"
#include "xlat/v4l2_control_flags.h"
static int
print_v4l2_queryctrl(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct v4l2_queryctrl c;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &c))
return RVAL_IOCTL_DECODED;
set_tcb_priv_ulong(tcp, c.id);
tprints("{id=");
print_v4l2_cid(c.id, true);
return 0;
}
/* exiting */
if (syserror(tcp) || umove(tcp, arg, &c) < 0) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
unsigned long entry_id = get_tcb_priv_ulong(tcp);
if (c.id != entry_id) {
tprints(" => ");
print_v4l2_cid(c.id, false);
}
PRINT_FIELD_XVAL(", ", c, type, v4l2_control_types,
"V4L2_CTRL_TYPE_???");
PRINT_FIELD_CSTRING(", ", c, name);
if (!abbrev(tcp)) {
PRINT_FIELD_D(", ", c, minimum);
PRINT_FIELD_D(", ", c, maximum);
PRINT_FIELD_D(", ", c, step);
PRINT_FIELD_D(", ", c, default_value);
PRINT_FIELD_FLAGS(", ", c, flags, v4l2_control_flags,
"V4L2_CTRL_FLAG_???");
if (!IS_ARRAY_ZERO(c.reserved))
PRINT_FIELD_ARRAY(", ", c, reserved, tcp,
print_xint32_array_member);
} else {
tprints(", ...");
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
static int
print_v4l2_cropcap(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct v4l2_cropcap c;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &c))
return RVAL_IOCTL_DECODED;
tprints("{type=");
printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &c)) {
tprintf(", bounds=" FMT_RECT
", defrect=" FMT_RECT
", pixelaspect=" FMT_FRACT,
ARGS_RECT(c.bounds),
ARGS_RECT(c.defrect),
ARGS_FRACT(c.pixelaspect));
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
static int
print_v4l2_crop(struct tcb *const tcp, const kernel_ulong_t arg,
const bool is_get)
{
struct v4l2_crop c;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &c))
return RVAL_IOCTL_DECODED;
tprints("{type=");
printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
if (is_get)
return 0;
tprintf(", c=" FMT_RECT, ARGS_RECT(c.c));
} else {
if (!syserror(tcp) && !umove(tcp, arg, &c))
tprintf(", c=" FMT_RECT, ARGS_RECT(c.c));
}
tprints("}");
return RVAL_IOCTL_DECODED;
}
static bool
print_v4l2_ext_control(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
{
const struct_v4l2_ext_control *p = elem_buf;
tprints("{id=");
printxval(v4l2_control_ids, p->id, "V4L2_CID_???");
tprintf(", size=%u", p->size);
if (p->size > 0) {
tprints(", string=");
printstrn(tcp, ptr_to_kulong(p->string), p->size);
} else {
tprintf(", value=%d, value64=%" PRId64, p->value, p->value64);
}
tprints("}");
return true;
}
static int
print_v4l2_ext_controls(struct tcb *const tcp, const kernel_ulong_t arg,
const bool is_get)
{
struct_v4l2_ext_controls c;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &c))
return RVAL_IOCTL_DECODED;
tprints("{ctrl_class=");
printxval(v4l2_control_classes, c.ctrl_class,
"V4L2_CTRL_CLASS_???");
tprintf(", count=%u", c.count);
if (!c.count) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
if (is_get)
return 0;
tprints(", ");
} else {
if (umove(tcp, arg, &c) < 0) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
tprints(is_get ? ", " : "} => {");
}
tprints("controls=");
struct_v4l2_ext_control ctrl;
bool fail = !print_array(tcp, ptr_to_kulong(c.controls), c.count,
&ctrl, sizeof(ctrl),
tfetch_mem_ignore_syserror,
print_v4l2_ext_control, 0);
if (exiting(tcp) && syserror(tcp))
tprintf(", error_idx=%u", c.error_idx);
if (exiting(tcp) || fail) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
/* entering */
return 0;
}
#include "xlat/v4l2_framesize_types.h"
static int
print_v4l2_frmsizeenum(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct_v4l2_frmsizeenum s;
if (entering(tcp)) {
tprints(", ");
if (umove_or_printaddr(tcp, arg, &s))
return RVAL_IOCTL_DECODED;
tprintf("{index=%u, pixel_format=", s.index);
print_pixelformat(s.pixel_format, v4l2_pix_fmts);
return 0;
}
if (!syserror(tcp) && !umove(tcp, arg, &s)) {
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}",