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annotate libervia/cli/call_tui.py @ 4210:9218d4331bb2

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cli (call): `tui` output implementation: - Moved original UI to a separated class, and use if with the `simple` output - By default, best output is automatically selected. For now `gui` is selected if possible, and `simple` is used as fallback. - The new `tui` output can be used to have the videos directly embedded in the terminal, either with real videos for compatible terminal emulators, or with Unicode blocks. - Text contrôls are used for both `simple` and `tui` outputs - several options can be used with `--oo` (will be documented in next commit). rel 428
author Goffi <goffi@goffi.org>
date Fri, 16 Feb 2024 18:46:06 +0100
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children d01b8d002619
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rev   line source
4210
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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 webrtc
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31
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32 from .call_simple import BaseAVTUI
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33 from .call_webrtc import CallData, WebRTCCall
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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 class AVCallUI(BaseAVTUI):
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41 def __init__(self, parent):
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42 super().__init__(parent.host, align="center")
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43 self.parent = parent
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44 self.image_rows = 0
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45 self.buffer = None
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46 self._processing = False
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47 self.render_class: t_image.ImageMeta | None = None
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48 self.target_size
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49 self.fps = 25
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50 for oo in parent.args.output_opts:
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51 if oo.startswith("renderer="):
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52 renderer = oo[9:].lower().strip()
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53 match renderer:
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54 case "auto":
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55 # we let None as it will auto-detect best option later
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56 pass
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57 case "block":
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58 self.render_class = t_image.BlockImage
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59 case "iterm2":
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60 self.render_class = t_image.ITerm2Image
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61 case "kitty":
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62 self.render_class = t_image.KittyImage
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63 case _:
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64 parent.parser.error(f"Invalid renderer: {renderer!r}")
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65 elif oo.startswith("fps="):
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66 try:
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67 self.fps = int(oo[4:])
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68 except ValueError:
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69 parent.parser.error(f"Invalid FPS: {oo[4:]!r}")
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70
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71 async def init_call(self, call_data):
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72 kwargs = self.parse_output_opts(self.parent)
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73 if "target_size" not in kwargs:
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74 # we use low res by default for performance reason
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75 kwargs["target_size"] = (640, 380)
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76 webrtc_call = await WebRTCCall.make_webrtc_call(
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77 self.parent.host,
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78 self.parent.profile,
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79 call_data,
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80 sinks=webrtc.SINKS_APP,
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81 appsink_data=webrtc.AppSinkData(
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82 local_video_cb=partial(self.on_new_sample, video_stream="local"),
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83 remote_video_cb=None,
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84 ),
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85 merge_pip=True,
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86 **kwargs,
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87 )
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88 self.webrtc = webrtc_call.webrtc
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89
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90 async def start(self, call_data):
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91 term_rows = self.host.console.size.height
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92 if term_rows < 20:
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93 self.host.disp(
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94 "Your terminal must have a height of a least 20 rows.", error=True
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95 )
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96 self.host.a_quit(C.EXIT_ERROR)
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97 self.image_rows = term_rows - 6
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98 self.image_cols = self.host.console.size.width
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99 await self.init_call(call_data)
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100 assert self.webrtc is not None
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101
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102 idx = 0
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103 self.buffer = ""
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104
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105 # we detect render
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106 if self.render_class is None:
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107 self.render_class = t_image.auto_image_class()
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108
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109 loop_sleep = 1/self.fps
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110
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111 with self.input.raw_mode():
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112 # for whatever reason, using self.input.attach is breaking KittyImage and uses
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113 # a BlockImage style rendering instead. So we don't use it and we call
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114 # ``self.keys_ready()`` ourself in the loop, below.
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115 # cursor is not restored despite the ``screen`` context if peer is hanging up,
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116 # so we reactivate cursor here
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117 self.host.add_on_quit_callback(self.host.console.show_cursor, True)
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118 with self.host.console.screen():
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119 while True:
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120 idx += 1
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121 if self.buffer is not None:
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122 sys.stdout.write(self.buffer)
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123 sys.stdout.write("\n")
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124 self.parent.console.print(
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125 # the padding avoid artifact when toggling buttons
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126 Padding(self.generate_control_bar(), (0, 2, 0, 0))
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127 )
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128 sys.stdout.flush()
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129 rendered = True
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130 else:
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131 rendered = False
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132 await asyncio.sleep(loop_sleep)
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133 self.keys_ready()
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134 if self.done.is_set():
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135 break
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136 if rendered:
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137 # we put cursor back at the top of image to print the next frame
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138 # FIXME: we use +4 for the controls because we know the height of the
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139 # renderable, but it would be better to measure it dynamically.
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140 sys.stdout.write(f"\033[{self.image_rows+4}A")
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141
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142 await self.webrtc.end_call()
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143 await self.host.a_quit()
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144
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145 @classmethod
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146 async def run(cls, parent, call_data: CallData) -> None:
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147 ui = cls(parent)
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148 await ui.start(call_data)
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149
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150 def on_new_sample(self, video_sink, video_stream: str) -> bool:
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151 if self._processing:
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152 # image encoding for terminal is slow, if one is already processing, we don't
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153 # bother going further
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154 return False
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155 sample = video_sink.emit("pull-sample")
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156 if sample is None:
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157 return False
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158
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159 video_pad = video_sink.get_static_pad("sink")
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160 assert video_pad is not None
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161 s = video_pad.get_current_caps().get_structure(0)
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162 stream_size = (s.get_value("width"), s.get_value("height"))
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163 buf = sample.get_buffer()
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164 result, mapinfo = buf.map(Gst.MapFlags.READ)
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165 if result and self.render_class is not None:
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166 self._processing = True
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167 image_data = mapinfo.data
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168 image = Image.frombuffer("RGB", stream_size, image_data, "raw", "RGB", 0, 1)
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169 img_renderer = self.render_class(image, height=self.image_rows)
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170 img_fmt = f"<{self.image_cols}.^1"
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171 if self.render_class == t_image.KittyImage:
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172 # we don't do compression to speed up things
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173 img_fmt += "+Wc0"
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174 self.host.loop.loop.call_soon_threadsafe(
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175 self.update_sample,
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176 sample,
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177 stream_size,
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178 video_stream,
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179 format(img_renderer, img_fmt),
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180 )
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181 self._processing = False
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182
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183 buf.unmap(mapinfo)
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184
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185 return False
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186
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187 def update_sample(self, sample, stream_size, video_stream: str, buffer) -> None:
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188 if sample is None:
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189 return
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190
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191 if video_stream == "remote":
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192 return
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193
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194 self.buffer = buffer