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browser-client.cpp
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browser-client.cpp
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/******************************************************************************
Copyright (C) 2014 by John R. Bradley <[email protected]>
Copyright (C) 2023 by Lain Bailey <[email protected]>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#include "browser-client.hpp"
#include "obs-browser-source.hpp"
#include "base64/base64.hpp"
#include <nlohmann/json.hpp>
#include <obs-frontend-api.h>
#include <obs.hpp>
#include <util/platform.h>
#include <QApplication>
#include <QThread>
#include <QToolTip>
#if defined(__APPLE__) && CHROME_VERSION_BUILD > 4430
#include <IOSurface/IOSurface.h>
#endif
inline bool BrowserClient::valid() const
{
return !!bs && !bs->destroying;
}
CefRefPtr<CefLoadHandler> BrowserClient::GetLoadHandler()
{
return this;
}
CefRefPtr<CefRenderHandler> BrowserClient::GetRenderHandler()
{
return this;
}
CefRefPtr<CefDisplayHandler> BrowserClient::GetDisplayHandler()
{
return this;
}
CefRefPtr<CefLifeSpanHandler> BrowserClient::GetLifeSpanHandler()
{
return this;
}
CefRefPtr<CefContextMenuHandler> BrowserClient::GetContextMenuHandler()
{
return this;
}
CefRefPtr<CefAudioHandler> BrowserClient::GetAudioHandler()
{
return reroute_audio ? this : nullptr;
}
#if CHROME_VERSION_BUILD >= 4638
CefRefPtr<CefRequestHandler> BrowserClient::GetRequestHandler()
{
return this;
}
CefRefPtr<CefResourceRequestHandler> BrowserClient::GetResourceRequestHandler(CefRefPtr<CefBrowser>,
CefRefPtr<CefFrame>,
CefRefPtr<CefRequest> request, bool, bool,
const CefString &, bool &)
{
if (request->GetHeaderByName("origin") == "null") {
return this;
}
return nullptr;
}
CefResourceRequestHandler::ReturnValue BrowserClient::OnBeforeResourceLoad(CefRefPtr<CefBrowser>, CefRefPtr<CefFrame>,
CefRefPtr<CefRequest>,
CefRefPtr<CefCallback>)
{
return RV_CONTINUE;
}
#endif
bool BrowserClient::OnBeforePopup(CefRefPtr<CefBrowser>, CefRefPtr<CefFrame>, const CefString &, const CefString &,
cef_window_open_disposition_t, bool, const CefPopupFeatures &, CefWindowInfo &,
CefRefPtr<CefClient> &, CefBrowserSettings &, CefRefPtr<CefDictionaryValue> &, bool *)
{
/* block popups */
return true;
}
void BrowserClient::OnBeforeContextMenu(CefRefPtr<CefBrowser>, CefRefPtr<CefFrame>, CefRefPtr<CefContextMenuParams>,
CefRefPtr<CefMenuModel> model)
{
/* remove all context menu contributions */
model->Clear();
}
bool BrowserClient::OnProcessMessageReceived(CefRefPtr<CefBrowser> browser, CefRefPtr<CefFrame>, CefProcessId,
CefRefPtr<CefProcessMessage> message)
{
const std::string &name = message->GetName();
CefRefPtr<CefListValue> input_args = message->GetArgumentList();
nlohmann::json json;
if (!valid()) {
return false;
}
// Fall-through switch, so that higher levels also have lower-level rights
switch (webpage_control_level) {
case ControlLevel::All:
if (name == "startRecording") {
obs_frontend_recording_start();
} else if (name == "stopRecording") {
obs_frontend_recording_stop();
} else if (name == "startStreaming") {
obs_frontend_streaming_start();
} else if (name == "stopStreaming") {
obs_frontend_streaming_stop();
} else if (name == "pauseRecording") {
obs_frontend_recording_pause(true);
} else if (name == "unpauseRecording") {
obs_frontend_recording_pause(false);
} else if (name == "startVirtualcam") {
obs_frontend_start_virtualcam();
} else if (name == "stopVirtualcam") {
obs_frontend_stop_virtualcam();
}
[[fallthrough]];
case ControlLevel::Advanced:
if (name == "startReplayBuffer") {
obs_frontend_replay_buffer_start();
} else if (name == "stopReplayBuffer") {
obs_frontend_replay_buffer_stop();
} else if (name == "setCurrentScene") {
const std::string scene_name = input_args->GetString(1).ToString();
OBSSourceAutoRelease source = obs_get_source_by_name(scene_name.c_str());
if (!source) {
blog(LOG_WARNING,
"Browser source '%s' tried to switch to scene '%s' which doesn't exist",
obs_source_get_name(bs->source), scene_name.c_str());
} else if (!obs_source_is_scene(source)) {
blog(LOG_WARNING, "Browser source '%s' tried to switch to '%s' which isn't a scene",
obs_source_get_name(bs->source), scene_name.c_str());
} else {
obs_frontend_set_current_scene(source);
}
} else if (name == "setCurrentTransition") {
const std::string transition_name = input_args->GetString(1).ToString();
obs_frontend_source_list transitions = {};
obs_frontend_get_transitions(&transitions);
OBSSourceAutoRelease transition;
for (size_t i = 0; i < transitions.sources.num; i++) {
obs_source_t *source = transitions.sources.array[i];
if (obs_source_get_name(source) == transition_name) {
transition = obs_source_get_ref(source);
break;
}
}
obs_frontend_source_list_free(&transitions);
if (transition)
obs_frontend_set_current_transition(transition);
else
blog(LOG_WARNING,
"Browser source '%s' tried to change the current transition to '%s' which doesn't exist",
obs_source_get_name(bs->source), transition_name.c_str());
}
[[fallthrough]];
case ControlLevel::Basic:
if (name == "saveReplayBuffer") {
obs_frontend_replay_buffer_save();
}
[[fallthrough]];
case ControlLevel::ReadUser:
if (name == "getScenes") {
struct obs_frontend_source_list list = {};
obs_frontend_get_scenes(&list);
std::vector<nlohmann::json> scenes_vector;
for (size_t i = 0; i < list.sources.num; i++) {
obs_source_t *source = list.sources.array[i];
scenes_vector.push_back(obs_source_get_name(source));
}
json = scenes_vector;
obs_frontend_source_list_free(&list);
} else if (name == "getCurrentScene") {
OBSSourceAutoRelease current_scene = obs_frontend_get_current_scene();
if (!current_scene)
return false;
const char *name = obs_source_get_name(current_scene);
if (!name)
return false;
json = {{"name", name},
{"width", obs_source_get_width(current_scene)},
{"height", obs_source_get_height(current_scene)}};
} else if (name == "getTransitions") {
struct obs_frontend_source_list list = {};
obs_frontend_get_transitions(&list);
std::vector<nlohmann::json> transitions_vector;
for (size_t i = 0; i < list.sources.num; i++) {
obs_source_t *source = list.sources.array[i];
transitions_vector.push_back(obs_source_get_name(source));
}
json = transitions_vector;
obs_frontend_source_list_free(&list);
} else if (name == "getCurrentTransition") {
OBSSourceAutoRelease source = obs_frontend_get_current_transition();
json = obs_source_get_name(source);
}
[[fallthrough]];
case ControlLevel::ReadObs:
if (name == "getStatus") {
json = {{"recording", obs_frontend_recording_active()},
{"streaming", obs_frontend_streaming_active()},
{"recordingPaused", obs_frontend_recording_paused()},
{"replaybuffer", obs_frontend_replay_buffer_active()},
{"virtualcam", obs_frontend_virtualcam_active()}};
}
[[fallthrough]];
case ControlLevel::None:
if (name == "getControlLevel") {
json = (int)webpage_control_level;
}
}
CefRefPtr<CefProcessMessage> msg = CefProcessMessage::Create("executeCallback");
CefRefPtr<CefListValue> execute_args = msg->GetArgumentList();
execute_args->SetInt(0, input_args->GetInt(0));
execute_args->SetString(1, json.dump());
SendBrowserProcessMessage(browser, PID_RENDERER, msg);
return true;
}
void BrowserClient::GetViewRect(CefRefPtr<CefBrowser>, CefRect &rect)
{
if (!valid()) {
rect.Set(0, 0, 16, 16);
return;
}
rect.Set(0, 0, bs->width < 1 ? 1 : bs->width, bs->height < 1 ? 1 : bs->height);
}
bool BrowserClient::OnTooltip(CefRefPtr<CefBrowser>, CefString &text)
{
std::string str_text = text;
QMetaObject::invokeMethod(QCoreApplication::instance()->thread(),
[str_text]() { QToolTip::showText(QCursor::pos(), str_text.c_str()); });
return true;
}
void BrowserClient::OnPaint(CefRefPtr<CefBrowser>, PaintElementType type, const RectList &, const void *buffer,
int width, int height)
{
if (type != PET_VIEW) {
// TODO Overlay texture on top of bs->texture
return;
}
#ifdef ENABLE_BROWSER_SHARED_TEXTURE
if (sharing_available) {
return;
}
#endif
if (!valid()) {
return;
}
if (bs->width != width || bs->height != height) {
obs_enter_graphics();
bs->DestroyTextures();
obs_leave_graphics();
}
if (!bs->texture && width && height) {
obs_enter_graphics();
bs->texture = gs_texture_create(width, height, GS_BGRA, 1, (const uint8_t **)&buffer, GS_DYNAMIC);
bs->width = width;
bs->height = height;
obs_leave_graphics();
} else {
obs_enter_graphics();
gs_texture_set_image(bs->texture, (const uint8_t *)buffer, width * 4, false);
obs_leave_graphics();
}
}
#ifdef ENABLE_BROWSER_SHARED_TEXTURE
void BrowserClient::UpdateExtraTexture()
{
if (bs->texture) {
const uint32_t cx = gs_texture_get_width(bs->texture);
const uint32_t cy = gs_texture_get_height(bs->texture);
const gs_color_format format = gs_texture_get_color_format(bs->texture);
const gs_color_format linear_format = gs_generalize_format(format);
if (linear_format != format) {
if (!bs->extra_texture || bs->last_format != linear_format || bs->last_cx != cx ||
bs->last_cy != cy) {
if (bs->extra_texture) {
gs_texture_destroy(bs->extra_texture);
bs->extra_texture = nullptr;
}
bs->extra_texture = gs_texture_create(cx, cy, linear_format, 1, nullptr, 0);
bs->last_cx = cx;
bs->last_cy = cy;
bs->last_format = linear_format;
}
} else if (bs->extra_texture) {
gs_texture_destroy(bs->extra_texture);
bs->extra_texture = nullptr;
bs->last_cx = 0;
bs->last_cy = 0;
bs->last_format = GS_UNKNOWN;
}
}
}
void BrowserClient::OnAcceleratedPaint(CefRefPtr<CefBrowser>, PaintElementType type, const RectList &,
#if CHROME_VERSION_BUILD >= 6367
const CefAcceleratedPaintInfo &info)
#else
void *shared_handle)
#endif
{
if (type != PET_VIEW) {
// TODO Overlay texture on top of bs->texture
return;
}
if (!valid()) {
return;
}
#if !defined(_WIN32) && CHROME_VERSION_BUILD < 6367
if (shared_handle == bs->last_handle)
return;
#endif
obs_enter_graphics();
if (bs->texture) {
#ifdef _WIN32
//gs_texture_release_sync(bs->texture, 0);
#endif
gs_texture_destroy(bs->texture);
bs->texture = nullptr;
}
#if defined(__APPLE__) && CHROME_VERSION_BUILD > 6367
bs->texture = gs_texture_create_from_iosurface((IOSurfaceRef)(uintptr_t)info.shared_texture_io_surface);
#elif defined(__APPLE__) && CHROME_VERSION_BUILD > 4183
bs->texture = gs_texture_create_from_iosurface((IOSurfaceRef)(uintptr_t)shared_handle);
#elif defined(_WIN32) && CHROME_VERSION_BUILD > 4183
bs->texture =
#if CHROME_VERSION_BUILD >= 6367
gs_texture_open_nt_shared((uint32_t)(uintptr_t)info.shared_texture_handle);
#else
gs_texture_open_nt_shared((uint32_t)(uintptr_t)shared_handle);
#endif
//if (bs->texture)
// gs_texture_acquire_sync(bs->texture, 1, INFINITE);
#else
bs->texture = gs_texture_open_shared((uint32_t)(uintptr_t)shared_handle);
#endif
UpdateExtraTexture();
obs_leave_graphics();
#if defined(__APPLE__) && CHROME_VERSION_BUILD >= 6367
bs->last_handle = info.shared_texture_io_surface;
#elif CHROME_VERSION_BUILD >= 6367
bs->last_handle = info.shared_texture_handle;
#else
bs->last_handle = shared_handle;
#endif
}
#ifdef CEF_ON_ACCELERATED_PAINT2
void BrowserClient::OnAcceleratedPaint2(CefRefPtr<CefBrowser>, PaintElementType type, const RectList &,
void *shared_handle, bool new_texture)
{
if (type != PET_VIEW) {
// TODO Overlay texture on top of bs->texture
return;
}
if (!valid()) {
return;
}
if (!new_texture) {
return;
}
obs_enter_graphics();
if (bs->texture) {
gs_texture_destroy(bs->texture);
bs->texture = nullptr;
}
#if defined(__APPLE__) && CHROME_VERSION_BUILD > 4183
bs->texture = gs_texture_create_from_iosurface((IOSurfaceRef)(uintptr_t)shared_handle);
#elif defined(_WIN32) && CHROME_VERSION_BUILD > 4183
bs->texture = gs_texture_open_nt_shared((uint32_t)(uintptr_t)shared_handle);
#else
bs->texture = gs_texture_open_shared((uint32_t)(uintptr_t)shared_handle);
#endif
UpdateExtraTexture();
obs_leave_graphics();
}
#endif
#endif
static speaker_layout GetSpeakerLayout(CefAudioHandler::ChannelLayout cefLayout)
{
switch (cefLayout) {
case CEF_CHANNEL_LAYOUT_MONO:
return SPEAKERS_MONO; /**< Channels: MONO */
case CEF_CHANNEL_LAYOUT_STEREO:
return SPEAKERS_STEREO; /**< Channels: FL, FR */
case CEF_CHANNEL_LAYOUT_2POINT1:
case CEF_CHANNEL_LAYOUT_2_1:
case CEF_CHANNEL_LAYOUT_SURROUND:
return SPEAKERS_2POINT1; /**< Channels: FL, FR, LFE */
case CEF_CHANNEL_LAYOUT_2_2:
case CEF_CHANNEL_LAYOUT_QUAD:
case CEF_CHANNEL_LAYOUT_4_0:
return SPEAKERS_4POINT0; /**< Channels: FL, FR, FC, RC */
case CEF_CHANNEL_LAYOUT_4_1:
case CEF_CHANNEL_LAYOUT_5_0:
case CEF_CHANNEL_LAYOUT_5_0_BACK:
return SPEAKERS_4POINT1; /**< Channels: FL, FR, FC, LFE, RC */
case CEF_CHANNEL_LAYOUT_5_1:
case CEF_CHANNEL_LAYOUT_5_1_BACK:
return SPEAKERS_5POINT1; /**< Channels: FL, FR, FC, LFE, RL, RR */
case CEF_CHANNEL_LAYOUT_7_1:
case CEF_CHANNEL_LAYOUT_7_1_WIDE_BACK:
case CEF_CHANNEL_LAYOUT_7_1_WIDE:
return SPEAKERS_7POINT1; /**< Channels: FL, FR, FC, LFE, RL, RR, SL, SR */
default:
return SPEAKERS_UNKNOWN;
}
}
#if CHROME_VERSION_BUILD >= 4103
void BrowserClient::OnAudioStreamStarted(CefRefPtr<CefBrowser> browser, const CefAudioParameters ¶ms_,
int channels_)
{
UNUSED_PARAMETER(browser);
channels = channels_;
channel_layout = (ChannelLayout)params_.channel_layout;
sample_rate = params_.sample_rate;
frames_per_buffer = params_.frames_per_buffer;
}
void BrowserClient::OnAudioStreamPacket(CefRefPtr<CefBrowser> browser, const float **data, int frames, int64_t pts)
{
UNUSED_PARAMETER(browser);
if (!valid()) {
return;
}
struct obs_source_audio audio = {};
const uint8_t **pcm = (const uint8_t **)data;
speaker_layout speakers = GetSpeakerLayout(channel_layout);
int speaker_count = get_audio_channels(speakers);
for (int i = 0; i < speaker_count; i++)
audio.data[i] = pcm[i];
audio.samples_per_sec = sample_rate;
audio.frames = frames;
audio.format = AUDIO_FORMAT_FLOAT_PLANAR;
audio.speakers = speakers;
audio.timestamp = (uint64_t)pts * 1000000LLU;
obs_source_output_audio(bs->source, &audio);
}
void BrowserClient::OnAudioStreamStopped(CefRefPtr<CefBrowser> browser)
{
UNUSED_PARAMETER(browser);
}
void BrowserClient::OnAudioStreamError(CefRefPtr<CefBrowser> browser, const CefString &message)
{
UNUSED_PARAMETER(browser);
UNUSED_PARAMETER(message);
}
static CefAudioHandler::ChannelLayout Convert2CEFSpeakerLayout(int channels)
{
switch (channels) {
case 1:
return CEF_CHANNEL_LAYOUT_MONO;
case 2:
return CEF_CHANNEL_LAYOUT_STEREO;
case 3:
return CEF_CHANNEL_LAYOUT_2_1;
case 4:
return CEF_CHANNEL_LAYOUT_4_0;
case 5:
return CEF_CHANNEL_LAYOUT_4_1;
case 6:
return CEF_CHANNEL_LAYOUT_5_1;
case 8:
return CEF_CHANNEL_LAYOUT_7_1;
default:
return CEF_CHANNEL_LAYOUT_UNSUPPORTED;
}
}
bool BrowserClient::GetAudioParameters(CefRefPtr<CefBrowser> browser, CefAudioParameters ¶ms)
{
UNUSED_PARAMETER(browser);
int channels = (int)audio_output_get_channels(obs_get_audio());
params.channel_layout = Convert2CEFSpeakerLayout(channels);
params.sample_rate = (int)audio_output_get_sample_rate(obs_get_audio());
params.frames_per_buffer = kFramesPerBuffer;
return true;
}
#elif CHROME_VERSION_BUILD < 4103
void BrowserClient::OnAudioStreamStarted(CefRefPtr<CefBrowser> browser, int id, int, ChannelLayout channel_layout,
int sample_rate, int)
{
UNUSED_PARAMETER(browser);
if (!valid()) {
return;
}
AudioStream &stream = bs->audio_streams[id];
if (!stream.source) {
stream.source = obs_source_create_private("audio_line", nullptr, nullptr);
obs_source_add_active_child(bs->source, stream.source);
std::lock_guard<std::mutex> lock(bs->audio_sources_mutex);
bs->audio_sources.push_back(stream.source);
}
stream.speakers = GetSpeakerLayout(channel_layout);
stream.channels = get_audio_channels(stream.speakers);
stream.sample_rate = sample_rate;
}
void BrowserClient::OnAudioStreamPacket(CefRefPtr<CefBrowser> browser, int id, const float **data, int frames,
int64_t pts)
{
UNUSED_PARAMETER(browser);
if (!valid()) {
return;
}
AudioStream &stream = bs->audio_streams[id];
struct obs_source_audio audio = {};
const uint8_t **pcm = (const uint8_t **)data;
for (int i = 0; i < stream.channels; i++)
audio.data[i] = pcm[i];
audio.samples_per_sec = stream.sample_rate;
audio.frames = frames;
audio.format = AUDIO_FORMAT_FLOAT_PLANAR;
audio.speakers = stream.speakers;
audio.timestamp = (uint64_t)pts * 1000000LLU;
obs_source_output_audio(stream.source, &audio);
}
void BrowserClient::OnAudioStreamStopped(CefRefPtr<CefBrowser> browser, int id)
{
UNUSED_PARAMETER(browser);
if (!valid()) {
return;
}
auto pair = bs->audio_streams.find(id);
if (pair == bs->audio_streams.end()) {
return;
}
AudioStream &stream = pair->second;
{
std::lock_guard<std::mutex> lock(bs->audio_sources_mutex);
for (size_t i = 0; i < bs->audio_sources.size(); i++) {
obs_source_t *source = bs->audio_sources[i];
if (source == stream.source) {
bs->audio_sources.erase(bs->audio_sources.begin() + i);
break;
}
}
}
bs->audio_streams.erase(pair);
}
#endif
void BrowserClient::OnLoadEnd(CefRefPtr<CefBrowser>, CefRefPtr<CefFrame> frame, int)
{
if (!valid()) {
return;
}
if (frame->IsMain() && bs->css.length()) {
std::string uriEncodedCSS = CefURIEncode(bs->css, false).ToString();
std::string script;
script += "const obsCSS = document.createElement('style');";
script += "obsCSS.appendChild(document.createTextNode("
"decodeURIComponent(\"" +
uriEncodedCSS + "\")));";
script += "document.querySelector('head').appendChild(obsCSS);";
frame->ExecuteJavaScript(script, "", 0);
}
}
bool BrowserClient::OnConsoleMessage(CefRefPtr<CefBrowser>, cef_log_severity_t level, const CefString &message,
const CefString &source, int line)
{
int errorLevel = LOG_INFO;
const char *code = "Info";
switch (level) {
case LOGSEVERITY_ERROR:
errorLevel = LOG_WARNING;
code = "Error";
break;
case LOGSEVERITY_FATAL:
errorLevel = LOG_ERROR;
code = "Fatal";
break;
default:
return false;
}
const char *sourceName = "<unknown>";
if (bs && bs->source)
sourceName = obs_source_get_name(bs->source);
blog(errorLevel, "[obs-browser: '%s'] %s: %s (%s:%d)", sourceName, code, message.ToString().c_str(),
source.ToString().c_str(), line);
return false;
}