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common.py
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common.py
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# This file is part of Xpra.
# Copyright (C) 2014-2024 Antoine Martin <antoine@xpra.org>
# Xpra is released under the terms of the GNU GPL v2, or, at your option, any
# later version. See the file COPYING for details.
import os
from queue import SimpleQueue, Empty
from typing import Any
from collections.abc import Callable
from xpra.util.parsing import parse_simple_dict
from xpra.util.objects import typedict
from xpra.util.env import envint
from xpra.os_util import OSX, gi_import
from xpra.gstreamer.common import import_gst, GST_FLOW_OK
from xpra.gstreamer.pipeline import Pipeline
from xpra.log import Logger
Gst = import_gst()
log = Logger("encoder", "gstreamer")
FRAME_QUEUE_TIMEOUT = envint("XPRA_GSTREAMER_FRAME_QUEUE_TIMEOUT", 1)
FRAME_QUEUE_INITIAL_TIMEOUT = envint("XPRA_GSTREAMER_FRAME_QUEUE_INITIAL_TIMEOUT", 3)
def get_default_encoder_options() -> dict[str, dict[str, Any]]:
options: dict[str, dict[str, Any]] = {
"vaapih264enc": {
"max-bframes": 0, # int(options.boolget("b-frames", False))
# "tune" : 3, #low-power
# "rate-control" : 8, #qvbr
"compliance-mode": 0, # restrict-buf-alloc (1) – Restrict the allocation size of coded-buffer
# "keyframe-period" : 9999,
# "prediction-type" : 1, #hierarchical-p (1) – Hierarchical P frame encode
# "quality-factor" : 10,
# "quality-level" : 50,
# "bitrate" : 2000,
# "prediction-type" : 1, #Hierarchical P frame encode
# "keyframe-period" : 4294967295,
"aud": True,
},
"vaapih265enc": {
"max-bframes": 0, # int(options.boolget("b-frames", False))
# "tune" : 3, #low-power
# "rate-control" : 8, #qvbr
},
"amfh264enc": {
"usage": "ultra-low-latency",
},
"amfh265enc": {
"usage": "ultra-low-latency",
},
"x264enc": {
"speed-preset": "ultrafast",
"tune": "zerolatency",
"byte-stream": True,
"threads": 1,
"key-int-max": 15,
"intra-refresh": True,
},
"vp8enc": {
"deadline": 1,
"error-resilient": 0,
},
"vp9enc": {
"deadline": 1,
"error-resilient": 0,
"lag-in-frames": 0,
"cpu-used": 16,
},
"nvh264enc": {
"zerolatency": True,
"rc-mode": 3, # vbr
"preset": 5, # low latency, high performance
"bframes": 0,
"aud": True,
},
"nvh265enc": {
"zerolatency": True,
"rc-mode": 3, # vbr
"preset": 5, # low latency, high performance
# should be in GStreamer 1.18, but somehow missing?
# "bframes" : 0,
"aud": True,
},
"nvd3d11h264enc": {
"bframes": 0,
"aud": True,
"preset": 5, # low latency, high performance
"zero-reorder-delay": True,
},
"nvd3d11h265enc": {
"bframes": 0,
"aud": True,
"preset": 5, # low latency, high performance
"zero-reorder-delay": True,
},
"svtav1enc": {
# "speed" : 12,
# "gop-size" : 251,
"intra-refresh": 1, # open gop
# "lookahead" : 0,
# "rc" : 1, #vbr
},
"svtvp9enc": {
},
# "svthevcenc" : {
# "b-pyramid" : 0,
# "baselayer-mode" : 1,
# "enable-open-gop" : True,
# "key-int-max" : 255,
# "lookahead" : 0,
# "pred-struct" : 0,
# "rc" : 1, #vbr
# "speed" : 9,
# "tune" : 0,
# }
}
if not OSX:
options["av1enc"] = {
"cpu-used": 5,
"end-usage": 2, # cq
}
# now apply environment overrides:
for element in options.keys():
enc_options_str = os.environ.get(f"XPRA_{element.upper()}_OPTIONS", "")
if enc_options_str:
encoder_options = parse_simple_dict(enc_options_str)
log(f"user overridden options for {element}: {encoder_options}")
options[element] = encoder_options
return options
def get_default_decoder_options() -> dict[str, dict[str, Any]]:
options: dict[str, dict[str, Any]] = {
"av1dec": {
"stream-format": "obu-stream",
"alignment": "tu",
},
}
return options
def get_version() -> tuple[int, ...]:
return 5, 0
def get_type() -> str:
return "gstreamer"
def get_info() -> dict[str, Any]:
return {"version": get_version()}
def init_module() -> None:
log("gstreamer.init_module()")
def cleanup_module() -> None:
log("gstreamer.cleanup_module()")
IDENTICAL_PIXEL_FORMATS = (
"NV12",
"RGBA", "BGRA", "ARGB", "ABGR",
"RGB", "BGR",
"RGB15", "RGB16", "BGR15",
"r210",
"BGRP", "RGBP",
)
XPRA_TO_GSTREAMER = {
"YUV420P": "I420",
"YUV444P": "Y444",
"BGRX": "BGRx",
"XRGB": "xRGB",
"XBGR": "xBGR",
"YUV400": "GRAY8",
# "RGB8P"
}
GSTREAMER_TO_XPRA = dict((v, k) for k, v in XPRA_TO_GSTREAMER.items())
def get_gst_rgb_format(rgb_format: str) -> str:
if rgb_format in IDENTICAL_PIXEL_FORMATS:
return rgb_format
# translate to gstreamer name:
return XPRA_TO_GSTREAMER.get(rgb_format, "")
def get_xpra_rgb_format(rgb_format: str) -> str:
if rgb_format in IDENTICAL_PIXEL_FORMATS:
return rgb_format
# translate to gstreamer name:
return GSTREAMER_TO_XPRA.get(rgb_format, "")
def gst_to_native(value: Any) -> tuple | str:
if isinstance(value, Gst.ValueList):
return tuple(value.get_value(value, i) for i in range(value.get_size(value)))
if isinstance(value, Gst.IntRange):
return value.range.start, value.range.stop
if isinstance(value, Gst.FractionRange):
def preferint(v):
if int(v) == v:
return int(v)
return v
def numdenom(fraction):
return preferint(fraction.num), preferint(fraction.denom)
return numdenom(value.start), numdenom(value.stop)
# print(f"value={value} ({type(value)} - {dir(value)}")
return Gst.value_serialize(value)
def get_encoder_info(element="vp8enc") -> dict:
"""
Get the element's input information,
we only retrieve the "SINK" pad
if it accepts `video/x-raw`.
Convert Gst types into native types,
and convert pixel formats to the names used in xpra.
"""
factory = Gst.ElementFactory.find(element)
if not factory:
return {}
if factory.get_num_pad_templates() == 0:
return {}
pads = factory.get_static_pad_templates()
info = {}
GLib = gi_import("GLib")
log(f"get_encoder_info({element}) pads={pads}")
for pad in pads:
if pad.direction != Gst.PadDirection.SINK:
log(f"ignoring {pad.direction}")
continue
padtemplate = pad.get()
caps = padtemplate.get_caps()
if not caps:
log(f"pad template {padtemplate} has no caps!")
continue
if caps.is_any():
continue
if caps.is_empty():
continue
for i in range(caps.get_size()):
structure = caps.get_structure(i)
if structure.get_name() != "video/x-raw":
continue
def add_cap(field, value):
fname = GLib.quark_to_string(field)
native_value = gst_to_native(value)
log(f"{fname}={native_value} ({type(native_value)})")
if fname == "format":
if isinstance(native_value, str):
# convert it to a tuple:
native_value = native_value,
if isinstance(native_value, tuple):
xpra_formats = tuple(get_xpra_rgb_format(x) for x in native_value)
native_value = tuple(fmt for fmt in xpra_formats if fmt)
info[fname] = native_value
return True
structure.foreach(add_cap)
return info
def get_video_encoder_caps(encoder: str = "x264enc") -> dict[str, Any]:
if encoder == "jpeg":
return {}
if encoder == "av1enc":
return {
"alignment": "tu",
"stream-format": "obu-stream",
}
return {
"alignment": "au",
"stream-format": "byte-stream",
}
def get_video_encoder_options(encoder: str = "x264", profile: str = "", options: typedict | None = None):
eopts = get_default_encoder_options().get(encoder, {})
eopts["name"] = "encoder"
if encoder == "x264enc" and options:
from xpra.codecs.constants import get_x264_quality, get_x264_preset
q = get_x264_quality(options.intget("quality", 50), profile)
s = options.intget("speed", 50)
eopts |= {
"pass": "qual",
"quantizer": q,
"speed-preset": get_x264_preset(s),
}
# should check for "bframes" flag in options?
return eopts
def get_gst_encoding(encoding: str) -> str:
if encoding in ("jpeg", "png"):
return f"image/{encoding}"
video = {"hevc": "h265"}.get(encoding, encoding)
return f"video/x-{video}"
class VideoPipeline(Pipeline):
__generic_signals__: dict[str, tuple] = Pipeline.__generic_signals__.copy()
"""
Dispatch video encoding or decoding to a gstreamer pipeline
"""
def init_context(self, encoding: str, width: int, height: int, colorspace: str, options=None):
options = typedict(options or {})
self.encoding: str = encoding
self.width: int = width
self.height: int = height
self.colorspace: str = colorspace
self.frames: int = 0
self.frame_queue: SimpleQueue[Any] = SimpleQueue()
self.pipeline_str: str = ""
self.create_pipeline(options)
self.src: Gst.Element = self.pipeline.get_by_name("src")
self.src.set_property("format", Gst.Format.TIME)
# self.src.set_caps(Gst.Caps.from_string(CAPS))
self.sink: Gst.Element = self.pipeline.get_by_name("sink")
def sh(sig: str, handler: Callable):
self.element_connect(self.sink, sig, handler)
sh("new-sample", self.on_new_sample)
sh("new-preroll", self.on_new_preroll)
self.start()
def create_pipeline(self, options):
raise NotImplementedError()
def on_message(self, bus, message) -> int:
if message.type == Gst.MessageType.NEED_CONTEXT and self.pipeline_str.find("vaapi") >= 0:
log("vaapi is requesting a context")
return GST_FLOW_OK
return super().on_message(bus, message)
def on_new_preroll(self, _appsink) -> int:
log("new-preroll")
return GST_FLOW_OK
def process_buffer(self, buf):
r = self.src.emit("push-buffer", buf)
if r != GST_FLOW_OK:
log.error("Error: unable to push image buffer")
return None
timeout = FRAME_QUEUE_INITIAL_TIMEOUT if self.frames == 0 else FRAME_QUEUE_TIMEOUT
try:
return self.frame_queue.get(timeout=timeout)
except Empty:
log.error(f"Error: frame queue timeout after {timeout}s")
try:
btype = type(buf).__qualname__
log.error(f" on {btype!r} of size {buf.get_size()}")
except AttributeError:
pass
for k, v in self.get_info().items():
log.error(f" {k:<16}: {v}")
return None
def get_info(self) -> dict[str, Any]:
info: dict[str, Any] = get_info()
if not self.colorspace:
return info
info |= {
"frames": self.frames,
"width": self.width,
"height": self.height,
"encoding": self.encoding,
"colorspace": self.colorspace,
"version": get_version(),
}
return info
def __repr__(self):
if not self.colorspace:
return "gstreamer(uninitialized)"
return f"gstreamer({self.colorspace} - {self.width}x{self.height})"
def is_ready(self) -> bool:
return bool(self.colorspace)
def is_closed(self) -> bool:
return not bool(self.colorspace)
def get_encoding(self) -> str:
return self.encoding
def get_width(self) -> int:
return self.width
def get_height(self) -> int:
return self.height
def get_type(self) -> str:
return "gstreamer"
def clean(self) -> None:
super().cleanup()
self.width = 0
self.height = 0
self.colorspace = ""
self.encoding = ""
self.frames = 0
def do_emit_info(self) -> None:
self.emit_info_timer = 0