415 lines
14 KiB
Python
415 lines
14 KiB
Python
# People's Video Editor: high quality, GPU accelerated mp4 editor
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# Copyright (C) 2025 Roz K <roz@rozk.net>
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#
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# This file is part of People's Video Editor.
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#
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# People's Video Editor is free software: you can redistribute it and/or modify it under the terms of the
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# GNU General Public License as published by the Free Software Foundation, either version 3 of the License,
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# or (at your option) any later version.
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#
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# People's Video Editor is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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# without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along with People's Video Editor.
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# If not, see <https://www.gnu.org/licenses/>.
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import errno
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import ctypes
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from pathlib import PurePath
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shared_library_path = PurePath(__file__).parent
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def load_shared_library(name):
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path = str(shared_library_path / ("lib" + name + ".so"))
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return ctypes.cdll.LoadLibrary(path)
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_avutil = load_shared_library("avutil")
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_avformat = load_shared_library("avformat")
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_avcodec = load_shared_library("avcodec")
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def _errtag(a, b, c, d):
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return -(ord(a) | (ord(b) << 8) | (ord(c) << 16) | (ord(d) << 24))
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if errno.EAGAIN < 0:
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AVERROR_EAGAIN = errno.EAGAIN
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else:
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AVERROR_EAGAIN = -errno.EAGAIN
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AVERROR_EOF = _errtag('E', 'O', 'F', ' ')
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_AV_ERROR_MAX_STRING_SIZE = 64
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AVMEDIA_TYPE_UNKNOWN = -1
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AVMEDIA_TYPE_VIDEO = 0
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AVMEDIA_TYPE_AUDIO = 1
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AVMEDIA_TYPE_DATA = 2
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AVMEDIA_TYPE_SUBTITLE = 3
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AVMEDIA_TYPE_ATTACHMENT = 4
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AV_NUM_DATA_POINTERS = 8
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FF_THREAD_FRAME = 1
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FF_THREAD_SLICE = 2
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c_uint8_p = ctypes.POINTER(ctypes.c_uint8)
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c_uint8_pp = ctypes.POINTER(c_uint8_p)
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class AVRational(ctypes.Structure):
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_fields_ = [
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("num", ctypes.c_int),
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("den", ctypes.c_int)]
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class AVFrame(ctypes.Structure):
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_fields_ = [
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("data", c_uint8_p * AV_NUM_DATA_POINTERS),
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("linesize", ctypes.c_int * AV_NUM_DATA_POINTERS),
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("extended_data", c_uint8_pp),
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("width", ctypes.c_int),
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("height", ctypes.c_int),
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("nb_samples", ctypes.c_int),
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("format", ctypes.c_int),
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("key_frame", ctypes.c_int),
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("pict_type", ctypes.c_int),
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("sample_aspect_ratio", AVRational),
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("pts", ctypes.c_int64),
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("pkt_dts", ctypes.c_int64),
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("time_base", AVRational)]
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# ...
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AVFrame_p = ctypes.POINTER(AVFrame)
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AVFrame_pp = ctypes.POINTER(AVFrame_p)
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class AVCodecParameters(ctypes.Structure):
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pass
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AVCodecParameters_p = ctypes.POINTER(AVCodecParameters)
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class AVStream(ctypes.Structure):
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_fields_ = [
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("av_class", ctypes.c_void_p),
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("index", ctypes.c_int),
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("id", ctypes.c_int),
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("codecpar", AVCodecParameters_p),
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("priv_data", ctypes.c_void_p),
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("time_base", AVRational)]
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# ...
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AVStream_p = ctypes.POINTER(AVStream)
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AVStream_pp = ctypes.POINTER(AVStream_p)
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class AVFormatContext(ctypes.Structure):
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_fields_ = [
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("av_class", ctypes.c_void_p),
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("iformat", ctypes.c_void_p),
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("oformat", ctypes.c_void_p),
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("priv_data", ctypes.c_void_p),
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("pb", ctypes.c_void_p),
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("ctx_flags", ctypes.c_int),
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("nb_streams", ctypes.c_uint),
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("streams", AVStream_pp)]
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# ...
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AVFormatContext_p = ctypes.POINTER(AVFormatContext)
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AVFormatContext_pp = ctypes.POINTER(AVFormatContext_p)
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class AVPacket(ctypes.Structure):
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_fields_ = [
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("buf", ctypes.c_void_p),
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("pts", ctypes.c_int64),
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("dts", ctypes.c_int64),
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("data", ctypes.c_void_p),
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("size", ctypes.c_int),
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("stream_index", ctypes.c_int)]
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# ...
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AVPacket_p = ctypes.POINTER(AVPacket)
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AVPacket_pp = ctypes.POINTER(AVPacket_p)
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class AVCodec(ctypes.Structure):
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_fields_ = [
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("name", ctypes.c_char_p),
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("long_name", ctypes.c_char_p),
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("type", ctypes.c_int), # AVMediaType
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("id", ctypes.c_int), # AVCodecID
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("capabilities", ctypes.c_int), # AV_CODEC_CAP_*
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("max_lowres", ctypes.c_uint8),
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("deprecated_supported_framerates", ctypes.c_void_p),
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("deprecated_pix_fmts", ctypes.c_void_p),
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("deprecated_supported_samplerates", ctypes.c_void_p),
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("deprecated_sample_fmts", ctypes.c_void_p),
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("priv_class", ctypes.c_void_p),
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("profiles", ctypes.c_void_p), # AVProfile
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("wrapper_name", ctypes.c_char_p)]
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# ...
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AVCodec_p = ctypes.POINTER(AVCodec)
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AVCodec_pp = ctypes.POINTER(AVCodec_p)
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class AVChannelLayout_u(ctypes.Union):
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_fields_ = [
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("mask", ctypes.c_uint64),
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("map", ctypes.c_void_p)] # AVChannelCustom
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class AVChannelLayout(ctypes.Structure):
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_fields_ = [
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("order", ctypes.c_int), # AVChannelOrder
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("nb_channels", ctypes.c_int),
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("u", AVChannelLayout_u),
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("opaque", ctypes.c_void_p)]
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class AVCodecContext(ctypes.Structure):
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_fields_ = [
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("av_class", ctypes.c_void_p),
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("log_level_offset", ctypes.c_int),
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("codec_type", ctypes.c_int),
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("codec", AVCodec_p),
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("codec_id", ctypes.c_int),
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("codec_tag", ctypes.c_uint),
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("priv_data", ctypes.c_void_p),
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("internal", ctypes.c_void_p), # AVCodecInternal
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("opaque", ctypes.c_void_p),
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("bit_rate", ctypes.c_int64),
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("flags", ctypes.c_int),
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("flags2", ctypes.c_int),
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("extradata", ctypes.POINTER(ctypes.c_uint8)),
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("extradata_size", ctypes.c_int),
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("time_base", AVRational),
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("pkt_timebase", AVRational),
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("framerate", AVRational),
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("delay", ctypes.c_int),
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("width", ctypes.c_int),
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("height", ctypes.c_int),
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("coded_width", ctypes.c_int),
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("coded_height", ctypes.c_int),
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("sample_aspect_ratio", AVRational),
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("pix_fmt", ctypes.c_int), # AVPixelFormat
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("sw_pix_fmt", ctypes.c_int), # AVPixelFormat
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("color_primaries", ctypes.c_int), # AVColorPrimaries
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("color_trc", ctypes.c_int), # AVColorTransferCharacteristic
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("colorspace", ctypes.c_int), # AVColorSpace
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("color_range", ctypes.c_int), # AVColorRange
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("chroma_sample_location", ctypes.c_int), # AVChromaLocation
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("field_order", ctypes.c_int), # AVFieldOrder
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("refs", ctypes.c_int),
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("has_b_frames", ctypes.c_int),
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("slice_flags", ctypes.c_int),
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("draw_horiz_band", ctypes.c_void_p),
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("get_format", ctypes.c_void_p),
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("max_b_frames", ctypes.c_int),
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("b_quant_factor", ctypes.c_float),
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("b_quant_offset", ctypes.c_float),
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("i_quant_factor", ctypes.c_float),
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("i_quant_offset", ctypes.c_float),
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("lumi_masking", ctypes.c_float),
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("temporal_cplx_masking", ctypes.c_float),
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("spatial_cplx_masking", ctypes.c_float),
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("p_masking", ctypes.c_float),
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("dark_masking", ctypes.c_float),
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("nsse_weight", ctypes.c_int),
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("me_cmp", ctypes.c_int),
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("me_sub_cmp", ctypes.c_int),
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("mb_cmp", ctypes.c_int),
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("ildct_cmp", ctypes.c_int),
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("dia_size", ctypes.c_int),
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("last_predictor_count", ctypes.c_int),
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("me_pre_cmp", ctypes.c_int),
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("pre_dia_size", ctypes.c_int),
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("me_subpel_quality", ctypes.c_int),
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("me_range", ctypes.c_int),
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("mb_decision", ctypes.c_int),
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("intra_matrix", ctypes.POINTER(ctypes.c_uint16)),
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("inter_matrix", ctypes.POINTER(ctypes.c_uint16)),
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("chroma_intra_matrix", ctypes.POINTER(ctypes.c_uint16)),
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("intra_dc_precision", ctypes.c_int),
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("mb_lmin", ctypes.c_int),
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("mb_lmax", ctypes.c_int),
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("bidir_refine", ctypes.c_int),
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("keyint_min", ctypes.c_int),
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("gop_size", ctypes.c_int),
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("mv0_threshold", ctypes.c_int),
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("slices", ctypes.c_int),
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("sample_rate", ctypes.c_int),
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("sample_fmt", ctypes.c_int), # AVSampleFormat
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("ch_layout", AVChannelLayout),
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("frame_size", ctypes.c_int),
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("block_align", ctypes.c_int),
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("cutoff", ctypes.c_int),
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("audio_service_type", ctypes.c_int), # AVAudioServiceType
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("request_sample_fmt", ctypes.c_int), # AVSampleFormat
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("initial_padding", ctypes.c_int),
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("trailing_padding", ctypes.c_int),
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("seek_preroll", ctypes.c_int),
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("get_buffer2", ctypes.c_void_p),
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("bit_rate_tolerance", ctypes.c_int),
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("global_quality", ctypes.c_int),
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("compression_level", ctypes.c_int),
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("qcompress", ctypes.c_float),
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("qblur", ctypes.c_float),
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("qmin", ctypes.c_int),
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("qmax", ctypes.c_int),
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("max_qdiff", ctypes.c_int),
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("rc_buffer_size", ctypes.c_int),
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("rc_override_count", ctypes.c_int),
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("rc_override", ctypes.c_void_p), # RcOverride
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("rc_max_rate", ctypes.c_int64),
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("rc_min_rate", ctypes.c_int64),
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("rc_max_available_vbv_use", ctypes.c_float),
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("rc_min_vbv_overflow_use", ctypes.c_float),
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("rc_initial_buffer_occupancy", ctypes.c_int),
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("trellis", ctypes.c_int),
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("stats_out", ctypes.c_char_p),
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("stats_in", ctypes.c_char_p),
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("workaround_bugs", ctypes.c_int),
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("strict_std_compliance", ctypes.c_int),
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("error_concealment", ctypes.c_int),
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("debug", ctypes.c_int),
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("err_recognition", ctypes.c_int),
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("hwaccel", ctypes.c_void_p), # AVHWAccel
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("hwaccel_context", ctypes.c_void_p),
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("hw_frames_ctx", ctypes.c_void_p), # AVBufferRef
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("hw_device_ctx", ctypes.c_void_p), # AVBufferRef
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("hwaccel_flags", ctypes.c_int),
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("extra_hw_frames", ctypes.c_int),
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("error", ctypes.c_uint64 * AV_NUM_DATA_POINTERS),
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("dct_algo", ctypes.c_int),
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("idct_algo", ctypes.c_int),
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("bits_per_coded_sample", ctypes.c_int),
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("bits_per_raw_sample", ctypes.c_int),
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("thread_count", ctypes.c_int),
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("thread_type", ctypes.c_int)]
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# ...
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AVCodecContext_p = ctypes.POINTER(AVCodecContext)
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AVCodecContext_pp = ctypes.POINTER(AVCodecContext_p)
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_avutil.av_strerror.restype = ctypes.c_int
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_avutil.av_strerror.argtypes = [
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ctypes.c_int, # errno
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ctypes.c_char_p, # errbuf
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ctypes.c_size_t] # errbuff_size
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def strerror(errno):
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errbuf = ctypes.create_string_buffer(_AV_ERROR_MAX_STRING_SIZE)
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_avutil.av_strerror(errno, errbuf, _AV_ERROR_MAX_STRING_SIZE)
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return errbuf.value.decode("utf-8")
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_avutil.av_frame_alloc.restype = AVFrame_p
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_avutil.av_frame_alloc.argtypes = None
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def frame_alloc():
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return _avutil.av_frame_alloc()
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_avutil.av_frame_free.restype = None
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_avutil.av_frame_free.argtypes = [AVFrame_pp]
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def frame_free(frame):
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_avutil.av_frame_free(ctypes.byref(frame))
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_avformat.avformat_alloc_context.restype = AVFormatContext_p
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_avformat.avformat_alloc_context.argtypes = None
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def format_alloc_context():
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return _avformat.avformat_alloc_context()
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_avformat.avformat_free_context.restype = None
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_avformat.avformat_free_context.argtypes = [AVFormatContext_p]
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def format_free_context(context):
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_avformat.avformat_free_context(context)
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_avformat.avformat_open_input.restype = ctypes.c_int
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_avformat.avformat_open_input.argtypes = [
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AVFormatContext_pp,
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ctypes.c_char_p, # url
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ctypes.c_void_p, # format
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ctypes.POINTER(ctypes.c_void_p)] # options
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def format_open_input(context, url):
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return _avformat.avformat_open_input(ctypes.byref(context), url.encode('ascii', 'ignore'), None, None)
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_avformat.avformat_close_input.restype = None
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_avformat.avformat_close_input.argtypes = [AVFormatContext_pp]
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def format_close_input(context):
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_avformat.avformat_close_input(ctypes.byref(context))
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_avformat.avformat_find_stream_info.restype = ctypes.c_int
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_avformat.avformat_find_stream_info.argtypes = [
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AVFormatContext_p,
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ctypes.POINTER(ctypes.c_void_p)] # options
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def format_find_stream_info(context):
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return _avformat.avformat_find_stream_info(context, None)
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_avformat.av_find_best_stream.restype = ctypes.c_int
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_avformat.av_find_best_stream.argtypes = [
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AVFormatContext_p,
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ctypes.c_int, # type
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ctypes.c_int, # wanted stream
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ctypes.c_int, # related stream
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AVCodec_pp,
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ctypes.c_int] # flags
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def format_find_best_stream(context, type):
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codec = AVCodec_p()
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index = _avformat.av_find_best_stream(context, type, -1, -1, ctypes.byref(codec), 0)
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return index, codec
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_avformat.av_packet_alloc.restype = AVPacket_p
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_avformat.av_packet_alloc.argtypes = None
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def packet_alloc():
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return _avformat.av_packet_alloc()
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_avformat.av_packet_free.restype = None
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_avformat.av_packet_free.argtypes = [AVPacket_pp]
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def packet_free(packet):
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_avformat.av_packet_free(ctypes.byref(packet))
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_avformat.av_read_frame.restype = ctypes.c_int
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_avformat.av_read_frame.argtypes = [AVFormatContext_p, AVPacket_p]
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def read_frame(context, packet):
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return _avformat.av_read_frame(context, packet)
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_avcodec.avcodec_alloc_context3.restype = AVCodecContext_p
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_avcodec.avcodec_alloc_context3.argtypes = [AVCodec_p]
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def codec_alloc_context(codec):
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return _avcodec.avcodec_alloc_context3(codec)
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_avcodec.avcodec_free_context.restype = None
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_avcodec.avcodec_free_context.argtypes = [AVCodecContext_pp]
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def codec_free_context(context):
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_avcodec.avcodec_free_context(ctypes.byref(context))
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_avcodec.avcodec_parameters_to_context.restype = ctypes.c_int
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_avcodec.avcodec_parameters_to_context.argtypes = [AVCodecContext_p, AVCodecParameters_p]
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def codec_parameters_to_context(context, parameters):
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return _avcodec.avcodec_parameters_to_context(context, parameters)
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_avcodec.avcodec_open2.restype = ctypes.c_int
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_avcodec.avcodec_open2.argtypes = [
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AVCodecContext_p,
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AVCodec_p,
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ctypes.POINTER(ctypes.c_void_p)] # options
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def codec_open(context, codec):
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return _avcodec.avcodec_open2(context, codec, None)
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_avcodec.avcodec_send_packet.restype = ctypes.c_int
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_avcodec.avcodec_send_packet.argtypes = [AVCodecContext_p, AVPacket_p]
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def codec_send_packet(context, packet):
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return _avcodec.avcodec_send_packet(context, packet)
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_avcodec.avcodec_receive_frame.restype = ctypes.c_int
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_avcodec.avcodec_receive_frame.argtypes = [AVCodecContext_p, AVFrame_p]
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def codec_receive_frame(context, frame):
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return _avcodec.avcodec_receive_frame(context, frame)
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