Mercurial > libervia-backend

annotate libervia/cli/call_tui.py @ 4266:9fc3d28bc3f6

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core (main): add a mechanism to have a shared temp directory: this directory may be used to share files between backend and frontends. Normally, an os-dependent temporary directory is created for that, but if this option is set, the directory will be created in <local_dir>/<cache_dir>, which may be useful in some use case (e.g. containerized frontends and backend).
author Goffi <goffi@goffi.org>
date Wed, 12 Jun 2024 22:47:34 +0200
parents 79c8a70e1813
children 0d7bb4df2343
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python3
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2
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3 # Libervia CLI
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4 # Copyright (C) 2009-2024 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19
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20 import asyncio
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21 from functools import partial
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22 import sys
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23
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24 from PIL import Image
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25 import gi
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26 from rich.padding import Padding
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27 from term_image import image as t_image
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28
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29 from libervia.cli.constants import Const as C
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30 from libervia.frontends.tools import aio, webrtc
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31 from libervia.frontends.tools.webrtc import CallData, WebRTCCall
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32
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33 from .call_simple import BaseAVTUI
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34
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35 gi.require_versions({"Gst": "1.0", "GstWebRTC": "1.0"})
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36
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37 from gi.repository import Gst
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38
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39
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40 aio.install_glib_asyncio_iteration()
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41
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42
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43 class AVCallUI(BaseAVTUI):
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44 def __init__(self, parent):
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45 super().__init__(parent.host, align="center")
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46 self.parent = parent
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47 self.image_rows = 0
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48 self.buffer = None
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49 self._processing = False
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50 self.render_class: t_image.ImageMeta | None = None
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51 self.target_size
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52 self.fps = 25
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53 for oo in parent.args.output_opts:
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54 if oo.startswith("renderer="):
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55 renderer = oo[9:].lower().strip()
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56 match renderer:
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57 case "auto":
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58 # we let None as it will auto-detect best option later
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59 pass
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60 case "block":
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61 self.render_class = t_image.BlockImage
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62 case "iterm2":
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63 self.render_class = t_image.ITerm2Image
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64 case "kitty":
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65 self.render_class = t_image.KittyImage
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66 case _:
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67 parent.parser.error(f"Invalid renderer: {renderer!r}")
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68 elif oo.startswith("fps="):
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69 try:
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70 self.fps = int(oo[4:])
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71 except ValueError:
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72 parent.parser.error(f"Invalid FPS: {oo[4:]!r}")
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73
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74 async def init_call(self, call_data):
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75 kwargs = self.parse_output_opts(self.parent)
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76 if "target_size" not in kwargs:
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77 # we use low res by default for performance reason
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78 kwargs["target_size"] = (640, 380)
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79 webrtc_call = await WebRTCCall.make_webrtc_call(
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80 self.parent.host.bridge,
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81 self.parent.profile,
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82 call_data,
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83 sinks_data=webrtc.SinksApp(
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84 local_video_cb=partial(self.on_new_sample, video_stream="local"),
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85 remote_video_cb=None,
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86 ),
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87 merge_pip=True,
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88 # we want to be sure that call is ended if user presses `Ctrl + c` or anything
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89 # else stops the session.
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90 on_call_setup_cb=lambda sid, profile: self.parent.host.add_on_quit_callback(
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91 self.parent.host.bridge.call_end, sid, "", profile
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92 ),
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93 on_call_ended_cb=lambda sid, profile: self.parent.host.a_quit(),
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94 **kwargs,
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95 )
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96 self.webrtc = webrtc_call.webrtc
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97
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98 async def start(self, call_data):
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99 term_rows = self.host.console.size.height
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100 if term_rows < 20:
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101 self.host.disp(
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102 "Your terminal must have a height of a least 20 rows.", error=True
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103 )
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104 self.host.a_quit(C.EXIT_ERROR)
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105 self.image_rows = term_rows - 6
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106 self.image_cols = self.host.console.size.width
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107 await self.init_call(call_data)
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108 assert self.webrtc is not None
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109
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110 idx = 0
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111 self.buffer = ""
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112
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113 # we detect render
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114 if self.render_class is None:
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115 self.render_class = t_image.auto_image_class()
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116
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117 loop_sleep = 1/self.fps
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118
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119 with self.input.raw_mode():
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120 # for whatever reason, using self.input.attach is breaking KittyImage and uses
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121 # a BlockImage style rendering instead. So we don't use it and we call
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122 # ``self.keys_ready()`` ourself in the loop, below.
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123 # cursor is not restored despite the ``screen`` context if peer is hanging up,
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124 # so we reactivate cursor here
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125 self.host.add_on_quit_callback(self.host.console.show_cursor, True)
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126 with self.host.console.screen():
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127 while True:
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128 idx += 1
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129 if self.buffer is not None:
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130 sys.stdout.write(self.buffer)
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131 sys.stdout.write("\n")
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132 self.parent.console.print(
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133 # the padding avoid artifact when toggling buttons
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134 Padding(self.generate_control_bar(), (0, 2, 0, 0))
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135 )
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136 sys.stdout.flush()
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137 rendered = True
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138 else:
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139 rendered = False
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140 await asyncio.sleep(loop_sleep)
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141 self.keys_ready()
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142 if self.done.is_set():
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143 break
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144 if rendered:
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145 # we put cursor back at the top of image to print the next frame
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146 # FIXME: we use +4 for the controls because we know the height of the
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147 # renderable, but it would be better to measure it dynamically.
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148 sys.stdout.write(f"\033[{self.image_rows+4}A")
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149
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150 await self.webrtc.end_call()
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151 await self.host.a_quit()
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152
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153 @classmethod
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154 async def run(cls, parent, call_data: CallData) -> None:
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155 ui = cls(parent)
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156 await ui.start(call_data)
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157
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158 def on_new_sample(self, video_sink, video_stream: str) -> bool:
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159 if self._processing:
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160 # image encoding for terminal is slow, if one is already processing, we don't
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161 # bother going further
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162 return False
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163 sample = video_sink.emit("pull-sample")
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164 if sample is None:
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165 return False
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166
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167 video_pad = video_sink.get_static_pad("sink")
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168 assert video_pad is not None
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169 s = video_pad.get_current_caps().get_structure(0)
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170 stream_size = (s.get_value("width"), s.get_value("height"))
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171 buf = sample.get_buffer()
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172 result, mapinfo = buf.map(Gst.MapFlags.READ)
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173 if result and self.render_class is not None:
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174 self._processing = True
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175 image_data = mapinfo.data
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176 image = Image.frombuffer("RGB", stream_size, image_data, "raw", "RGB", 0, 1)
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177 img_renderer = self.render_class(image, height=self.image_rows)
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178 img_fmt = f"<{self.image_cols}.^1"
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179 if self.render_class == t_image.KittyImage:
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180 # we don't do compression to speed up things
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181 img_fmt += "+Wc0"
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182 self.host.loop.loop.call_soon_threadsafe(
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183 self.update_sample,
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184 sample,
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185 stream_size,
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186 video_stream,
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187 format(img_renderer, img_fmt),
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188 )
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189 self._processing = False
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190
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191 buf.unmap(mapinfo)
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192
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193 return False
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194
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195 def update_sample(self, sample, stream_size, video_stream: str, buffer) -> None:
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196 if sample is None:
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197 return
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198
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199 if video_stream == "remote":
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200 return
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201
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202 self.buffer = buffer