Encode keymaps using xbox-dvd, pulse_distance, pulse_length and manchester
BPF decoders. The kernel has no idea how to encode them so this must be
done in userspace.
Signed-off-by: Sean Young <sean@xxxxxxxx>
---
utils/common/ir-encode.c | 26 ++++++-
utils/common/keymap.c | 1 +
utils/ir-ctl/Makefile.am | 2 +-
utils/ir-ctl/bpf_encoder.c | 137 +++++++++++++++++++++++++++++++++++++
utils/ir-ctl/bpf_encoder.h | 7 ++
utils/ir-ctl/ir-ctl.c | 31 ++++++---
6 files changed, 193 insertions(+), 11 deletions(-)
create mode 100644 utils/ir-ctl/bpf_encoder.c
create mode 100644 utils/ir-ctl/bpf_encoder.h
diff --git a/utils/common/ir-encode.c b/utils/common/ir-encode.c
index 47e294b1..e4fde403 100644
--- a/utils/common/ir-encode.c
+++ b/utils/common/ir-encode.c
@@ -342,6 +342,30 @@ static int rc6_encode(enum rc_proto proto, unsigned scancode, unsigned *buf)
return (n % 2) ? n : n + 1;
}
+static int xbox_dvd_encode(enum rc_proto proto, unsigned scancode, unsigned *buf)
+{
+ int len = 0;
+
+ buf[len++] = 4000;
+ buf[len++] = 3900;
+
+ scancode &= 0xfff;
+ scancode |= (~scancode << 12) & 0xfff000;
+
+ for (int i=23; i >=0; i--) {
+ buf[len++] = 550;
+
+ if (scancode & (1 << i))
+ buf[len++] = 1900;
+ else
+ buf[len++] = 900;
+ }
+
+ buf[len++]= 550;
+
+ return len;
+}
+
static const struct {
char name[10];
unsigned scancode_mask;
@@ -376,7 +400,7 @@ static const struct {
[RC_PROTO_RCMM12] = { "rc-mm-12", 0x0fff },
[RC_PROTO_RCMM24] = { "rc-mm-24", 0xffffff },
[RC_PROTO_RCMM32] = { "rc-mm-32", 0xffffffff },
- [RC_PROTO_XBOX_DVD] = { "xbox-dvd", 0xfff },
+ [RC_PROTO_XBOX_DVD] = { "xbox-dvd", 0xfff, 68, 38000, xbox_dvd_encode },
};
static bool str_like(const char *a, const char *b)
diff --git a/utils/common/keymap.c b/utils/common/keymap.c
index e3a162ab..20026cc4 100644
--- a/utils/common/keymap.c
+++ b/utils/common/keymap.c
@@ -404,6 +404,7 @@ static error_t parse_toml_protocol(const char *fname, struct toml_table_t *proot
}
struct scancode_entry **next = &map->scancode;
+ i = 0;
for (;;) {
struct scancode_entry *se;
diff --git a/utils/ir-ctl/Makefile.am b/utils/ir-ctl/Makefile.am
index df53a965..ad90b84e 100644
--- a/utils/ir-ctl/Makefile.am
+++ b/utils/ir-ctl/Makefile.am
@@ -1,6 +1,6 @@
bin_PROGRAMS = ir-ctl
man_MANS = ir-ctl.1
-ir_ctl_SOURCES = ir-ctl.c ir-encode.c ir-encode.h toml.c toml.h keymap.c keymap.h
+ir_ctl_SOURCES = ir-ctl.c ir-encode.c ir-encode.h toml.c toml.h keymap.c keymap.h bpf_encoder.c bpf_encoder.h
ir_ctl_LDADD = @LIBINTL@
ir_ctl_LDFLAGS = $(ARGP_LIBS)
diff --git a/utils/ir-ctl/bpf_encoder.c b/utils/ir-ctl/bpf_encoder.c
new file mode 100644
index 00000000..82d12cc0
--- /dev/null
+++ b/utils/ir-ctl/bpf_encoder.c
@@ -0,0 +1,137 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include "keymap.h"
+
+// Some keymaps use BPF decoders, so the kernel has no idea how to encode
+// them. We need user-space encoders for these.
+//
+// This encoders should match what the BPF decoders in
+// utils/keytable/bpf_protocols/*.c decode.
+
+static void encode_pulse_distance(struct keymap *map, uint32_t scancode, int *buf, int *length)
+{
+ int len = 0, bits, i;
+
+ buf[len++] = keymap_param(map, "header_pulse", 2125);
+ buf[len++] = keymap_param(map, "header_space", 1875);
+
+ bits = keymap_param(map, "bits", 4);
+
+ if (keymap_param(map, "reverse", 0)) {
+ for (i = 0; i < bits; i++) {
+ buf[len++] = keymap_param(map, "bit_pulse", 625);
+
+ if (scancode & (1 << i))
+ buf[len++] = keymap_param(map, "bit_1_space", 1625);
+ else
+ buf[len++] = keymap_param(map, "bit_0_space", 375);
+ }
+ } else {
+ for (i = bits - 1; i >= 0; i--) {
+ buf[len++] = keymap_param(map, "bit_pulse", 625);
+
+ if (scancode & (1 << i))
+ buf[len++] = keymap_param(map, "bit_1_space", 1625);
+ else
+ buf[len++] = keymap_param(map, "bit_0_space", 375);
+ }
+ }
+
+ buf[len++] = keymap_param(map, "trailer_pulse", 625);
+
+ *length = len;
+}
+
+static void encode_pulse_length(struct keymap *map, uint32_t scancode, int *buf, int *length)
+{
+ int len = 0, bits, i;
+
+ buf[len++] = keymap_param(map, "header_pulse", 2125);
+ buf[len++] = keymap_param(map, "header_space", 1875);
+
+ bits = keymap_param(map, "bits", 4);
+
+ if (keymap_param(map, "reverse", 0)) {
+ for (i = 0; i < bits; i++) {
+ if (scancode & (1 << i))
+ buf[len++] = keymap_param(map, "bit_1_space", 1625);
+ else
+ buf[len++] = keymap_param(map, "bit_0_space", 375);
+
+ buf[len++] = keymap_param(map, "bit_pulse", 625);
+ }
+ } else {
+ for (i = bits - 1; i >= 0; i--) {
+ if (scancode & (1 << i))
+ buf[len++] = keymap_param(map, "bit_1_space", 1625);
+ else
+ buf[len++] = keymap_param(map, "bit_0_space", 375);
+
+ buf[len++] = keymap_param(map, "bit_pulse", 625);
+ }
+ }
+
+ *length = len;
+}
+
+static void encode_manchester(struct keymap *map, uint32_t scancode, int *buf, int *length)
+{
+ int len = 0, bits, i;
+
+ void advance_space(unsigned length)
+ {
+ if (len % 2)
+ buf[len] += length;
+ else
+ buf[++len] = length;
+ }
+
+ void advance_pulse(unsigned length)
+ {
+ if (len % 2)
+ buf[++len] = length;
+ else
+ buf[len] += length;
+ }
+
+ bits = keymap_param(map, "bits", 14);
+
+ for (i = bits - 1; i >= 0; i--) {
+ if (scancode & (1 << i)) {
+ advance_pulse(keymap_param(map, "one_pulse", 888));
+ advance_space(keymap_param(map, "one_space", 888));
+ } else {
+ advance_space(keymap_param(map, "zero_space", 888));
+ advance_pulse(keymap_param(map, "zero_pulse", 888));
+ }
+ }
+
+ /* drop any trailing pulse */
+ *length = (len % 2) ? len : len + 1;
+}
+
+bool encode_bpf_protocol(struct keymap *map, uint32_t scancode, int *buf, int *length)
+{
+ if (!strcmp(map->protocol, "pulse_distance")) {
+ encode_pulse_distance(map, scancode, buf, length);
+ return true;
+ }
+
+ if (!strcmp(map->protocol, "pulse_length")) {
+ encode_pulse_length(map, scancode, buf, length);
+ return true;
+ }
+
+ if (!strcmp(map->protocol, "manchester")) {
+ encode_manchester(map, scancode, buf, length);
+ return true;
+ }
+
+ return false;
+}
diff --git a/utils/ir-ctl/bpf_encoder.h b/utils/ir-ctl/bpf_encoder.h
new file mode 100644
index 00000000..5d1d43a9
--- /dev/null
+++ b/utils/ir-ctl/bpf_encoder.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __BPF_ENCODER_H
+#define __BPF_ENCODER_H
+
+bool encode_bpf_protocol(struct keymap *map, uint32_t scancode, int *buf, int *length);
+
+#endif
diff --git a/utils/ir-ctl/ir-ctl.c b/utils/ir-ctl/ir-ctl.c
index 94a22043..586461ac 100644
--- a/utils/ir-ctl/ir-ctl.c
+++ b/utils/ir-ctl/ir-ctl.c
@@ -17,6 +17,7 @@
#include <unistd.h>
#include <stdlib.h>
#include <stdbool.h>
+#include <stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
@@ -31,6 +32,7 @@
#include "ir-encode.h"
#include "keymap.h"
+#include "bpf_encoder.h"
#ifdef ENABLE_NLS
# define _(string) gettext(string)
@@ -754,28 +756,39 @@ static struct send* convert_keycode(struct keymap *map, const char *keycode)
}
for (se = map->scancode; se; se = se->next) {
+ int buf[LIRCBUF_SIZE], length;
+ const char *proto_str;
+ enum rc_proto proto;
+
if (strcmp(se->keycode, keycode))
continue;
count++;
- if (!s) {
- const char *proto_str;
- enum rc_proto proto;
-
- proto_str = map->variant ?: map->protocol;
+ if (s)
+ continue;
- if (!protocol_match(proto_str, &proto)) {
- fprintf(stderr, _("error: protocol '%s' not suppoted\n"), proto_str);
- return NULL;
- }
+ proto_str = map->variant ?: map->protocol;
+ if (protocol_match(proto_str, &proto)) {
s = malloc(sizeof(*s));
s->protocol = proto;
s->scancode = se->scancode;
s->is_scancode = true;
s->is_keycode = false;
s->next = NULL;
+ } else if (encode_bpf_protocol(map, se->scancode,
+ buf, &length)) {
+ s = malloc(sizeof(*s) + sizeof(int) * length);
+ s->len = length;
+ memcpy(s->buf, buf, length * sizeof(int));
+ s->is_scancode = false;
+ s->is_keycode = false;
+ s->carrier = keymap_param(map, "carrier", 0);
+ s->next = NULL;
+ } else {
+ fprintf(stderr, _("error: protocol '%s' not supported\n"), proto_str);
+ return NULL;
}
}
}
--
2.21.0
