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https://gitlab.freedesktop.org/emersion/libdisplay-info.git
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Add a CLI tool
For now it only prints the JSON representation of the information exposed by libdisplay-info. A JSON schema [1] and libjsonschema [2] are used to encode JSON. [1]: https://json-schema.org/ [2]: https://sr.ht/~emersion/libjsonschema/ Signed-off-by: Simon Ser <contact@emersion.fr>
This commit is contained in:
Simon Ser
parent
fc9a605611
commit
f0e5199b50
4 changed files with 223 additions and 0 deletions
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@ -85,4 +85,5 @@ di_dep = declare_dependency(
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meson.override_dependency('libdisplay-info', di_dep)
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subdir('di-edid-decode')
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subdir('tool')
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subdir('test')
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129
tool/main.c
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129
tool/main.c
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@ -0,0 +1,129 @@
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#include <getopt.h>
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#include <stdlib.h>
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#include <string.h>
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#include <libdisplay-info/edid.h>
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#include <libdisplay-info/info.h>
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#include "schema.h"
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static struct edid *
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get_edid(const struct di_edid *edid)
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{
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const struct di_edid_vendor_product *vendor_product;
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char manufacturer[4];
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struct edid *wire_edid;
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struct edid_vendor_product *wire_vendor_product;
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vendor_product = di_edid_get_vendor_product(edid);
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snprintf(manufacturer, sizeof(manufacturer), "%.3s", vendor_product->manufacturer);
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wire_vendor_product = malloc(sizeof(*wire_vendor_product));
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*wire_vendor_product = (struct edid_vendor_product) {
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.manufacturer = strdup(manufacturer),
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.product = vendor_product->product,
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.serial = vendor_product->serial,
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.model_year = vendor_product->model_year,
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.manufacture_week = vendor_product->manufacture_week,
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.manufacture_year = vendor_product->manufacture_year,
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};
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wire_edid = malloc(sizeof(*wire_edid));
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*wire_edid = (struct edid) {
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.version = di_edid_get_version(edid),
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.revision = di_edid_get_revision(edid),
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.vendor_product = wire_vendor_product,
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};
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return wire_edid;
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}
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static struct display_info *
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get_info(const struct di_info *info)
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{
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const struct di_edid *edid;
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struct edid *wire_edid = NULL;
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struct display_info *wire_info;
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edid = di_info_get_edid(info);
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if (edid != NULL)
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wire_edid = get_edid(edid);
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wire_info = malloc(sizeof(*wire_info));
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*wire_info = (struct display_info) {
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.edid = wire_edid,
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};
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return wire_info;
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}
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static const char usage[] =
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"usage: libdisplay-info <edid>\n";
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static const struct option long_options[] = {
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{ "help", no_argument, 0, 'h' },
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{ 0, 0, 0, 0 }
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};
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int
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main(int argc, char *argv[])
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{
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FILE *in;
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static uint8_t raw[32 * 1024];
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size_t size = 0;
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struct di_info *info;
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int opt;
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struct jsch_encoder *enc;
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struct display_info *wire_info;
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in = stdin;
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while (1) {
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int option_index = 0;
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opt = getopt_long(argc, argv, "h", long_options, &option_index);
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if (opt == -1)
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break;
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fprintf(stderr, "%s", usage);
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return opt == 'h' ? 0 : 1;
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}
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if (argc > 1) {
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in = fopen(argv[1], "r");
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if (!in) {
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perror("failed to open input file");
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return 1;
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}
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}
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while (!feof(in)) {
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size += fread(&raw[size], 1, sizeof(raw) - size, in);
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if (ferror(in)) {
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perror("fread failed");
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return 1;
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} else if (size >= sizeof(raw)) {
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fprintf(stderr, "input too large\n");
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return 1;
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}
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}
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fclose(in);
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info = di_info_parse_edid(raw, size);
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if (!info) {
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perror("di_edid_parse failed");
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return 1;
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}
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wire_info = get_info(info);
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enc = jsch_encoder_create(stdout);
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display_info_encode(wire_info, enc);
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jsch_encoder_destroy(enc);
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printf("\n");
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display_info_finish(wire_info);
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free(wire_info);
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di_info_destroy(info);
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return 0;
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}
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40
tool/meson.build
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40
tool/meson.build
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@ -0,0 +1,40 @@
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libjsonschema = dependency('libjsonschema')
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libjsonschema_native = dependency('libjsonschema', native: true)
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libjsonschema_tool_path = libjsonschema_native.get_variable(pkgconfig: 'tool', internal: 'tool')
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libjsonschema_tool = find_program(libjsonschema_tool_path, native: true)
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schema = files('schema.json')
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schema_header = custom_target(
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'schema.h',
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command: [libjsonschema_tool, 'gen-header', '@INPUT@'],
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input: schema,
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output: 'schema.h',
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capture: true,
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)
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schema_code = custom_target(
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'schema.c',
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command: [libjsonschema_tool, 'gen-code', '@INPUT@'],
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input: schema,
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output: 'schema.c',
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capture: true,
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)
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schema_lib = static_library(
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'schema',
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schema_code,
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c_args: cc.get_supported_arguments(['-Wno-declaration-after-statement']),
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dependencies: libjsonschema,
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)
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executable(
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'libdisplay-info',
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[
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'main.c',
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schema_header,
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],
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dependencies: [di_dep, libjsonschema],
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link_with: schema_lib,
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install: true,
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)
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53
tool/schema.json
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53
tool/schema.json
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@ -0,0 +1,53 @@
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{
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"$schema": "https://json-schema.org/draft/2020-12/schema",
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"$ref": "#/$defs/edid",
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"$defs": {
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"uint16": {
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"type": "integer",
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"minimum": 0,
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"maximum": 65535
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},
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"uint32": {
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"type": "integer",
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"minimum": 0,
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"maximum": 4294967295
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},
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"display_info": {
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"type": "object",
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"additionalProperties": false,
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"properties": {
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"edid": { "$ref": "#/$defs/edid" }
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}
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},
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"edid": {
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"type": "object",
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"additionalProperties": false,
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"properties": {
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"version": { "type": "integer" },
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"revision": { "type": "integer" },
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"vendor_product": { "$ref": "#/$defs/edid_vendor_product" }
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},
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"required": [
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"version",
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"revision",
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"vendor_product"
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]
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},
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"edid_vendor_product": {
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"type": "object",
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"additionalProperties": false,
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"properties": {
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"manufacturer": { "type": "string" },
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"product": { "$ref": "#/$defs/uint16" },
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"serial": { "$ref": "#/$defs/uint32" },
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"model_year": { "type": "integer" },
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"manufacture_week": { "type": "integer" },
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"manufacture_year": { "type": "integer" }
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},
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"required": [
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"manufacturer",
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"product"
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]
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}
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}
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}
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