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#include "../include/GsrInfo.hpp"
#include <string.h>
#include <functional>
namespace gsr {
using StringSplitCallback = std::function<bool(std::string_view line)>;
static void string_split_char(const std::string &str, char delimiter, StringSplitCallback callback_func) {
size_t index = 0;
while(index < str.size()) {
size_t new_index = str.find(delimiter, index);
if(new_index == std::string::npos)
new_index = str.size();
if(!callback_func({str.data() + index, new_index - index}))
break;
index = new_index + 1;
}
}
static void parse_system_info_line(GsrInfo *gsr_info, const std::string &line) {
const size_t space_index = line.find(' ');
if(space_index == std::string::npos)
return;
const std::string_view attribute_name = {line.c_str(), space_index};
const std::string_view attribute_value = {line.c_str() + space_index + 1, line.size() - (space_index + 1)};
if(attribute_name == "display_server") {
if(attribute_value == "x11")
gsr_info->system_info.display_server = DisplayServer::X11;
else if(attribute_value == "wayland")
gsr_info->system_info.display_server = DisplayServer::WAYLAND;
}
}
static void parse_gpu_info_line(GsrInfo *gsr_info, const std::string &line) {
const size_t space_index = line.find(' ');
if(space_index == std::string::npos)
return;
const std::string_view attribute_name = {line.c_str(), space_index};
const std::string_view attribute_value = {line.c_str() + space_index + 1, line.size() - (space_index + 1)};
if(attribute_name == "vendor") {
if(attribute_value == "amd")
gsr_info->gpu_info.vendor = GpuVendor::AMD;
else if(attribute_value == "intel")
gsr_info->gpu_info.vendor = GpuVendor::INTEL;
else if(attribute_value == "nvidia")
gsr_info->gpu_info.vendor = GpuVendor::NVIDIA;
}
}
static void parse_video_codecs_line(GsrInfo *gsr_info, const std::string &line) {
if(line == "h264")
gsr_info->supported_video_codecs.h264 = true;
else if(line == "hevc")
gsr_info->supported_video_codecs.hevc = true;
else if(line == "av1")
gsr_info->supported_video_codecs.av1 = true;
else if(line == "vp8")
gsr_info->supported_video_codecs.vp8 = true;
else if(line == "vp9")
gsr_info->supported_video_codecs.vp9 = true;
}
static GsrMonitor capture_option_line_to_monitor(const std::string &line) {
size_t space_index = line.find(' ');
if(space_index == std::string::npos)
return { line, {0, 0} };
mgl::vec2i size = {0, 0};
if(sscanf(line.c_str() + space_index + 1, "%dx%d", &size.x, &size.y) != 2)
size = {0, 0};
return { line.substr(0, space_index), size };
}
static void parse_capture_options_line(GsrInfo *gsr_info, const std::string &line) {
if(line == "window")
gsr_info->supported_capture_options.window = true;
else if(line == "focused")
gsr_info->supported_capture_options.focused = true;
else if(line == "screen")
gsr_info->supported_capture_options.screen = true;
else if(line == "portal")
gsr_info->supported_capture_options.portal = true;
else
gsr_info->supported_capture_options.monitors.push_back(capture_option_line_to_monitor(line));
}
enum class GsrInfoSection {
UNKNOWN,
SYSTEM_INFO,
GPU_INFO,
VIDEO_CODECS,
CAPTURE_OPTIONS
};
static bool starts_with(const std::string &str, const char *substr) {
size_t len = strlen(substr);
return str.size() >= len && memcmp(str.data(), substr, len) == 0;
}
GsrInfoExitStatus get_gpu_screen_recorder_info(GsrInfo *gsr_info) {
*gsr_info = GsrInfo{};
FILE *f = popen("gpu-screen-recorder --info", "r");
if(!f) {
fprintf(stderr, "error: 'gpu-screen-recorder --info' failed\n");
return GsrInfoExitStatus::FAILED_TO_RUN_COMMAND;
}
char output[8192];
ssize_t bytes_read = fread(output, 1, sizeof(output) - 1, f);
if(bytes_read < 0 || ferror(f)) {
fprintf(stderr, "error: failed to read 'gpu-screen-recorder --info' output\n");
pclose(f);
return GsrInfoExitStatus::FAILED_TO_RUN_COMMAND;
}
output[bytes_read] = '\0';
GsrInfoSection section = GsrInfoSection::UNKNOWN;
string_split_char(output, '\n', [&](std::string_view line) {
const std::string line_str(line.data(), line.size());
if(starts_with(line_str, "section=")) {
const char *section_name = line_str.c_str() + 8;
if(strcmp(section_name, "system_info") == 0)
section = GsrInfoSection::SYSTEM_INFO;
else if(strcmp(section_name, "gpu_info") == 0)
section = GsrInfoSection::GPU_INFO;
else if(strcmp(section_name, "video_codecs") == 0)
section = GsrInfoSection::VIDEO_CODECS;
else if(strcmp(section_name, "capture_options") == 0)
section = GsrInfoSection::CAPTURE_OPTIONS;
else
section = GsrInfoSection::UNKNOWN;
return true;
}
switch(section) {
case GsrInfoSection::UNKNOWN: {
break;
}
case GsrInfoSection::SYSTEM_INFO: {
parse_system_info_line(gsr_info, line_str);
break;
}
case GsrInfoSection::GPU_INFO: {
parse_gpu_info_line(gsr_info, line_str);
break;
}
case GsrInfoSection::VIDEO_CODECS: {
parse_video_codecs_line(gsr_info, line_str);
break;
}
case GsrInfoSection::CAPTURE_OPTIONS: {
parse_capture_options_line(gsr_info, line_str);
break;
}
}
return true;
});
int status = pclose(f);
if(WIFEXITED(status)) {
switch(WEXITSTATUS(status)) {
case 0: return GsrInfoExitStatus::OK;
case 22: return GsrInfoExitStatus::OPENGL_FAILED;
case 23: return GsrInfoExitStatus::NO_DRM_CARD;
default: return GsrInfoExitStatus::FAILED_TO_RUN_COMMAND;
}
}
return GsrInfoExitStatus::FAILED_TO_RUN_COMMAND;
}
static AudioDevice parse_audio_device_line(const std::string &line) {
AudioDevice audio_device;
const size_t space_index = line.find(' ');
if(space_index == std::string::npos)
return audio_device;
const std::string_view audio_input_name = {line.c_str(), space_index};
const std::string_view audio_input_description = {line.c_str() + space_index + 1, line.size() - (space_index + 1)};
audio_device.name.assign(audio_input_name.data(), audio_input_name.size());
audio_device.description.assign(audio_input_description.data(), audio_input_description.size());
return audio_device;
}
std::vector<AudioDevice> get_audio_devices() {
std::vector<AudioDevice> audio_devices;
FILE *f = popen("gpu-screen-recorder --list-audio-devices", "r");
if(!f) {
fprintf(stderr, "error: 'gpu-screen-recorder --info' failed\n");
return audio_devices;
}
char output[16384];
ssize_t bytes_read = fread(output, 1, sizeof(output) - 1, f);
if(bytes_read < 0 || ferror(f)) {
fprintf(stderr, "error: failed to read 'gpu-screen-recorder --info' output\n");
pclose(f);
return audio_devices;
}
output[bytes_read] = '\0';
string_split_char(output, '\n', [&](std::string_view line) {
const std::string line_str(line.data(), line.size());
audio_devices.push_back(parse_audio_device_line(line_str));
return true;
});
return audio_devices;
}
}
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