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/*
* Copyright 2022 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/desktop_capture/linux/wayland/screencast_stream_utils.h"
#include <libdrm/drm_fourcc.h>
#include <pipewire/pipewire.h>
#include <spa/param/video/format-utils.h>
#include <string>
#include "rtc_base/string_to_number.h"
#if !PW_CHECK_VERSION(0, 3, 29)
#define SPA_POD_PROP_FLAG_MANDATORY (1u << 3)
#endif
#if !PW_CHECK_VERSION(0, 3, 33)
#define SPA_POD_PROP_FLAG_DONT_FIXATE (1u << 4)
#endif
namespace webrtc {
PipeWireVersion PipeWireVersion::Parse(const absl::string_view& version) {
std::vector<absl::string_view> parsed_version = rtc::split(version, '.');
if (parsed_version.size() != 3) {
return {};
}
std::optional<int> major = rtc::StringToNumber<int>(parsed_version.at(0));
std::optional<int> minor = rtc::StringToNumber<int>(parsed_version.at(1));
std::optional<int> micro = rtc::StringToNumber<int>(parsed_version.at(2));
// Return invalid version if we failed to parse it
if (!major || !minor || !micro) {
return {};
}
return {major.value(), minor.value(), micro.value()};
}
bool PipeWireVersion::operator>=(const PipeWireVersion& other) {
if (!major && !minor && !micro) {
return false;
}
return std::tie(major, minor, micro) >=
std::tie(other.major, other.minor, other.micro);
}
bool PipeWireVersion::operator<=(const PipeWireVersion& other) {
if (!major && !minor && !micro) {
return false;
}
return std::tie(major, minor, micro) <=
std::tie(other.major, other.minor, other.micro);
}
spa_pod* BuildFormat(spa_pod_builder* builder,
uint32_t format,
const std::vector<uint64_t>& modifiers,
const struct spa_rectangle* resolution,
const struct spa_fraction* frame_rate) {
spa_pod_frame frames[2];
spa_rectangle pw_min_screen_bounds = spa_rectangle{1, 1};
spa_rectangle pw_max_screen_bounds = spa_rectangle{UINT32_MAX, UINT32_MAX};
spa_pod_builder_push_object(builder, &frames[0], SPA_TYPE_OBJECT_Format,
SPA_PARAM_EnumFormat);
spa_pod_builder_add(builder, SPA_FORMAT_mediaType,
SPA_POD_Id(SPA_MEDIA_TYPE_video), 0);
spa_pod_builder_add(builder, SPA_FORMAT_mediaSubtype,
SPA_POD_Id(SPA_MEDIA_SUBTYPE_raw), 0);
spa_pod_builder_add(builder, SPA_FORMAT_VIDEO_format, SPA_POD_Id(format), 0);
if (modifiers.size()) {
if (modifiers.size() == 1 && modifiers[0] == DRM_FORMAT_MOD_INVALID) {
spa_pod_builder_prop(builder, SPA_FORMAT_VIDEO_modifier,
SPA_POD_PROP_FLAG_MANDATORY);
spa_pod_builder_long(builder, modifiers[0]);
} else {
spa_pod_builder_prop(
builder, SPA_FORMAT_VIDEO_modifier,
SPA_POD_PROP_FLAG_MANDATORY | SPA_POD_PROP_FLAG_DONT_FIXATE);
spa_pod_builder_push_choice(builder, &frames[1], SPA_CHOICE_Enum, 0);
// modifiers from the array
bool first = true;
for (int64_t val : modifiers) {
spa_pod_builder_long(builder, val);
// Add the first modifier twice as the very first value is the default
// option
if (first) {
spa_pod_builder_long(builder, val);
first = false;
}
}
spa_pod_builder_pop(builder, &frames[1]);
}
}
if (resolution) {
spa_pod_builder_add(builder, SPA_FORMAT_VIDEO_size,
SPA_POD_Rectangle(resolution), 0);
} else {
spa_pod_builder_add(builder, SPA_FORMAT_VIDEO_size,
SPA_POD_CHOICE_RANGE_Rectangle(&pw_min_screen_bounds,
&pw_min_screen_bounds,
&pw_max_screen_bounds),
0);
}
if (frame_rate) {
static const spa_fraction pw_min_frame_rate = spa_fraction{0, 1};
spa_pod_builder_add(builder, SPA_FORMAT_VIDEO_framerate,
SPA_POD_CHOICE_RANGE_Fraction(
frame_rate, &pw_min_frame_rate, frame_rate),
0);
spa_pod_builder_add(builder, SPA_FORMAT_VIDEO_maxFramerate,
SPA_POD_CHOICE_RANGE_Fraction(
frame_rate, &pw_min_frame_rate, frame_rate),
0);
}
return static_cast<spa_pod*>(spa_pod_builder_pop(builder, &frames[0]));
}
} // namespace webrtc