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feat(preprocessor): add preprocessor for mp4 and gif decode

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raccoonliukai committed Sep 24, 2019
1 parent 148f096 commit 2326fe97d17a5a545d50fd8390f61b8a3c728a90
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# Tencent is pleased to support the open source community by making GNES available.
#
# Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import numpy as np
from typing import List

from gnes.preprocessor.base import BaseVideoPreprocessor
from gnes.proto import gnes_pb2, array2blob
from gnes.preprocessor.io_utils import video


class VideoDecodePreprocessor(BaseVideoPreprocessor):
store_args_kwargs = True

def __init__(self,
frame_rate: int = 10,
vframes: int = -1,
scale: str = None,
*args,
**kwargs):
super().__init__(*args, **kwargs)
self.frame_rate = frame_rate
self.vframes = vframes
self.scale = scale

def apply(self, doc: 'gnes_pb2.Document') -> None:
super().apply(doc)

if doc.raw_bytes:
all_frames = video.capture_frames(
input_data=doc.raw_bytes,
scale=self.scale,
fps=self.frame_rate,
vframes=self.vframes)

c = doc.chunks.add()
c.doc_id = doc.doc_id
c.blob.CopyFrom(array2blob(all_frames))
c.offset = 0
c.weight = 1.0
else:
self.logger.error('bad document: "raw_bytes" is empty!')
@@ -0,0 +1,53 @@
# Tencent is pleased to support the open source community by making GNES available.
#
# Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import os
import unittest

from gnes.cli.parser import set_preprocessor_parser, _set_client_parser
from gnes.client.base import ZmqClient
from gnes.proto import gnes_pb2, RequestGenerator, blob2array
from gnes.service.base import ServiceManager
from gnes.service.preprocessor import PreprocessorService


class TestVideoDecode(unittest.TestCase):

def setUp(self):
self.dirname = os.path.dirname(__file__)
self.yml_path = os.path.join(self.dirname, 'yaml', 'preprocessor-video_decode.yml')
self.video_path = os.path.join(self.dirname, 'videos')

def test_video_decode_preprocessor(self):
args = set_preprocessor_parser().parse_args(['--yaml_path', self.yml_path])
c_args = _set_client_parser().parse_args([
'--port_in', str(args.port_out),
'--port_out', str(args.port_in)])
video_bytes = [
open(os.path.join(self.video_path, _), 'rb').read()
for _ in os.listdir(self.video_path)
]

with ServiceManager(PreprocessorService, args), ZmqClient(c_args) as client:
for req in RequestGenerator.index(video_bytes):
msg = gnes_pb2.Message()
msg.request.index.CopyFrom(req.index)
client.send_message(msg)
r = client.recv_message()
for d in r.request.index.docs:
self.assertGreater(len(d.chunks), 0)
for _ in range(len(d.chunks)):
shape = blob2array(d.chunks[_].blob).shape
self.assertEqual(shape[1:], (299, 299, 3))
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!VideoDecodePreprocessor
parameters:
frame_rate: 5
vframes: 1
scale: '299:299'
gnes_config:
is_trained: true

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