diff --git a/python/ftl/ftlstream.py b/python/ftl/ftlstream.py
index 9869d50d5934ff522a3bb172198ebacc4b4db1d2..183b0dc6b2f4c6bb693ce7cb1021d72644e32464 100644
--- a/python/ftl/ftlstream.py
+++ b/python/ftl/ftlstream.py
@@ -1,7 +1,30 @@
import msgpack
+
+import numpy as np
+
+from enum import IntEnum
from collections import namedtuple
from . libde265 import Decoder
+try:
+ import cv2 as cv
+ def ycbcr2rgb(img):
+ raise NotImplementedError("TODO")
+
+except ImportError:
+ import skimage.color
+ def ycbcr2rgb(img):
+ res = skimage.color.ycbcr2rgb(img.astype(np.float))
+
+ # clip
+ res[res > 1.0] = 1.0
+ res[res < 0.0] = 0.0
+
+ # skimage ycbcr2rgb() returns dtype float64, convert to uint8
+ return (res * 255).astype(np.uint8)
+
+# FTL definitions
+
_packet = namedtuple("Packet", ["codec", "definition", "block_total", "block_number", "flags", "data"])
_stream_packet = namedtuple("StreamPacket", ["timestamp", "streamID", "chanel_count", "channel"])
@@ -17,6 +40,88 @@ _definition_t = {
8 : ()
}
+class NALType(IntEnum):
+ CODED_SLICE_TRAIL_N = 0
+ CODED_SLICE_TRAIL_R = 1
+
+ CODED_SLICE_TSA_N = 2
+ CODED_SLICE_TSA_R = 3
+
+ CODED_SLICE_STSA_N = 4
+ CODED_SLICE_STSA_R = 5
+
+ CODED_SLICE_RADL_N = 6
+ CODED_SLICE_RADL_R = 7
+
+ CODED_SLICE_RASL_N = 8
+ CODED_SLICE_RASL_R = 9
+
+ RESERVED_VCL_N10 = 10
+ RESERVED_VCL_R11 = 11
+ RESERVED_VCL_N12 = 12
+ RESERVED_VCL_R13 = 13
+ RESERVED_VCL_N14 = 14
+ RESERVED_VCL_R15 = 15
+
+ CODED_SLICE_BLA_W_LP = 16
+ CODED_SLICE_BLA_W_RADL = 17
+ CODED_SLICE_BLA_N_LP = 18
+ CODED_SLICE_IDR_W_RADL = 19
+ CODED_SLICE_IDR_N_LP = 20
+ CODED_SLICE_CRA = 21
+ RESERVED_IRAP_VCL22 = 22
+ RESERVED_IRAP_VCL23 = 23
+
+ RESERVED_VCL24 = 24
+ RESERVED_VCL25 = 25
+ RESERVED_VCL26 = 26
+ RESERVED_VCL27 = 27
+ RESERVED_VCL28 = 28
+ RESERVED_VCL29 = 29
+ RESERVED_VCL30 = 30
+ RESERVED_VCL31 = 31
+
+ VPS = 32
+ SPS = 33
+ PPS = 34
+ ACCESS_UNIT_DELIMITER = 35
+ EOS = 36
+ EOB = 37
+ FILLER_DATA = 38
+ PREFIX_SEI = 39
+ SUFFIX_SEI = 40
+
+ RESERVED_NVCL41 = 41
+ RESERVED_NVCL42 = 42
+ RESERVED_NVCL43 = 43
+ RESERVED_NVCL44 = 44
+ RESERVED_NVCL45 = 45
+ RESERVED_NVCL46 = 46
+ RESERVED_NVCL47 = 47
+ UNSPECIFIED_48 = 48
+ UNSPECIFIED_49 = 49
+ UNSPECIFIED_50 = 50
+ UNSPECIFIED_51 = 51
+ UNSPECIFIED_52 = 52
+ UNSPECIFIED_53 = 53
+ UNSPECIFIED_54 = 54
+ UNSPECIFIED_55 = 55
+ UNSPECIFIED_56 = 56
+ UNSPECIFIED_57 = 57
+ UNSPECIFIED_58 = 58
+ UNSPECIFIED_59 = 59
+ UNSPECIFIED_60 = 60
+ UNSPECIFIED_61 = 61
+ UNSPECIFIED_62 = 62
+ UNSPECIFIED_63 = 63
+ INVALID = 64
+
+def get_NAL_type(data):
+ if not isinstance(data, bytes):
+ raise ValueError("expected bytes")
+
+ return NALType((data[4] >> 1) & 0x3f)
+
class FTLStream:
def __init__(self, file):
self._file = open(file, "br")
@@ -60,12 +165,18 @@ class FTLStream:
self._decoders[k] = Decoder(_definition_t[p.definition])
decoder = self._decoders[k]
+
decoder.push_data(p.data)
decoder.decode()
+
img = decoder.get_next_picture()
if img is not None:
- self._frames[k] = img
+ self._frames[k] = ycbcr2rgb(img[:,:,(0,2,1)]) # note: channels BGR
+
+ def _flush_decoders(self):
+ for decoder in self._decoders.values():
+ decoder.flush_data()
def read(self):
'''
@@ -99,6 +210,7 @@ class FTLStream:
raise ValueError("unkowno codec %i" % p.codec)
except Exception as e:
+ # TODO: Multiple exceptions possible. Re-design read()?
ex = e
try:
diff --git a/python/ftl/libde265.py b/python/ftl/libde265.py
index 567d4872d00b072bf9252eb8c77eb1ca4d7c17cd..b3830e0f542515609b04688d5429528503d89fd3 100644
--- a/python/ftl/libde265.py
+++ b/python/ftl/libde265.py
@@ -4,62 +4,78 @@ Python wrapper for libde265. Only decoding is (partly) implemented.
Requirements:
* libde265 library (libde265.so.0)
* numpy
- * skimage (rescaling)
+ * opencv or skimage
'''
+try:
+ import cv2 as cv
+
+ # TODO: test
+ def resize(img, size):
+ return cv.resize(img, dsize=reversed(size), interpolation=cv.INTER_CUBIC)
+
+except ImportError:
+ from skimage.transform import resize as resize_skimage
+
+ def resize(img, size):
+ # skimage resize() return dtype float64, convert back to uint8
+ # order: 0 nn, 1 bilinear, 3 bicubic
+ return (resize_skimage(img, size, order=3, mode="constant", cval=0) * 255).astype(np.uint8)
+
import ctypes
+from enum import IntEnum
import numpy as np
-from skimage.transform import rescale
# error codes copied from header (de265.h)
-DE265_OK = 0
-DE265_ERROR_NO_SUCH_FILE=1
-DE265_ERROR_COEFFICIENT_OUT_OF_IMAGE_BOUNDS=4
-DE265_ERROR_CHECKSUM_MISMATCH=5
-DE265_ERROR_CTB_OUTSIDE_IMAGE_AREA=6
-DE265_ERROR_OUT_OF_MEMORY=7
-DE265_ERROR_CODED_PARAMETER_OUT_OF_RANGE=8
-DE265_ERROR_IMAGE_BUFFER_FULL=9
-DE265_ERROR_CANNOT_START_THREADPOOL=10
-DE265_ERROR_LIBRARY_INITIALIZATION_FAILED=11
-DE265_ERROR_LIBRARY_NOT_INITIALIZED=12
-DE265_ERROR_WAITING_FOR_INPUT_DATA=13
-DE265_ERROR_CANNOT_PROCESS_SEI=14
-DE265_ERROR_PARAMETER_PARSING=15
-DE265_ERROR_NO_INITIAL_SLICE_HEADER=16
-DE265_ERROR_PREMATURE_END_OF_SLICE=17
-DE265_ERROR_UNSPECIFIED_DECODING_ERROR=18
-DE265_ERROR_NOT_IMPLEMENTED_YET = 502
-DE265_WARNING_NO_WPP_CANNOT_USE_MULTITHREADING = 1000
-DE265_WARNING_WARNING_BUFFER_FULL=1001
-DE265_WARNING_PREMATURE_END_OF_SLICE_SEGMENT=1002
-DE265_WARNING_INCORRECT_ENTRY_POINT_OFFSET=1003
-DE265_WARNING_CTB_OUTSIDE_IMAGE_AREA=1004
-DE265_WARNING_SPS_HEADER_INVALID=1005
-DE265_WARNING_PPS_HEADER_INVALID=1006
-DE265_WARNING_SLICEHEADER_INVALID=1007
-DE265_WARNING_INCORRECT_MOTION_VECTOR_SCALING=1008
-DE265_WARNING_NONEXISTING_PPS_REFERENCED=1009
-DE265_WARNING_NONEXISTING_SPS_REFERENCED=1010
-DE265_WARNING_BOTH_PREDFLAGS_ZERO=1011
-DE265_WARNING_NONEXISTING_REFERENCE_PICTURE_ACCESSED=1012
-DE265_WARNING_NUMMVP_NOT_EQUAL_TO_NUMMVQ=1013
-DE265_WARNING_NUMBER_OF_SHORT_TERM_REF_PIC_SETS_OUT_OF_RANGE=1014
-DE265_WARNING_SHORT_TERM_REF_PIC_SET_OUT_OF_RANGE=1015
-DE265_WARNING_FAULTY_REFERENCE_PICTURE_LIST=1016
-DE265_WARNING_EOSS_BIT_NOT_SET=1017
-DE265_WARNING_MAX_NUM_REF_PICS_EXCEEDED=1018
-DE265_WARNING_INVALID_CHROMA_FORMAT=1019
-DE265_WARNING_SLICE_SEGMENT_ADDRESS_INVALID=1020
-DE265_WARNING_DEPENDENT_SLICE_WITH_ADDRESS_ZERO=1021
-DE265_WARNING_NUMBER_OF_THREADS_LIMITED_TO_MAXIMUM=1022
-DE265_NON_EXISTING_LT_REFERENCE_CANDIDATE_IN_SLICE_HEADER=1023
-DE265_WARNING_CANNOT_APPLY_SAO_OUT_OF_MEMORY=1024
-DE265_WARNING_SPS_MISSING_CANNOT_DECODE_SEI=1025
-DE265_WARNING_COLLOCATED_MOTION_VECTOR_OUTSIDE_IMAGE_AREA=1026
+class libde265error(IntEnum):
+ DE265_OK = 0
+ DE265_ERROR_NO_SUCH_FILE=1
+ DE265_ERROR_COEFFICIENT_OUT_OF_IMAGE_BOUNDS=4
+ DE265_ERROR_CHECKSUM_MISMATCH=5
+ DE265_ERROR_CTB_OUTSIDE_IMAGE_AREA=6
+ DE265_ERROR_OUT_OF_MEMORY=7
+ DE265_ERROR_CODED_PARAMETER_OUT_OF_RANGE=8
+ DE265_ERROR_IMAGE_BUFFER_FULL=9
+ DE265_ERROR_CANNOT_START_THREADPOOL=10
+ DE265_ERROR_LIBRARY_INITIALIZATION_FAILED=11
+ DE265_ERROR_LIBRARY_NOT_INITIALIZED=12
+ DE265_ERROR_WAITING_FOR_INPUT_DATA=13
+ DE265_ERROR_CANNOT_PROCESS_SEI=14
+ DE265_ERROR_PARAMETER_PARSING=15
+ DE265_ERROR_NO_INITIAL_SLICE_HEADER=16
+ DE265_ERROR_PREMATURE_END_OF_SLICE=17
+ DE265_ERROR_UNSPECIFIED_DECODING_ERROR=18
+ DE265_ERROR_NOT_IMPLEMENTED_YET = 502
+ DE265_WARNING_NO_WPP_CANNOT_USE_MULTITHREADING = 1000
+ DE265_WARNING_WARNING_BUFFER_FULL=1001
+ DE265_WARNING_PREMATURE_END_OF_SLICE_SEGMENT=1002
+ DE265_WARNING_INCORRECT_ENTRY_POINT_OFFSET=1003
+ DE265_WARNING_CTB_OUTSIDE_IMAGE_AREA=1004
+ DE265_WARNING_SPS_HEADER_INVALID=1005
+ DE265_WARNING_PPS_HEADER_INVALID=1006
+ DE265_WARNING_SLICEHEADER_INVALID=1007
+ DE265_WARNING_INCORRECT_MOTION_VECTOR_SCALING=1008
+ DE265_WARNING_NONEXISTING_PPS_REFERENCED=1009
+ DE265_WARNING_NONEXISTING_SPS_REFERENCED=1010
+ DE265_WARNING_BOTH_PREDFLAGS_ZERO=1011
+ DE265_WARNING_NONEXISTING_REFERENCE_PICTURE_ACCESSED=1012
+ DE265_WARNING_NUMMVP_NOT_EQUAL_TO_NUMMVQ=1013
+ DE265_WARNING_NUMBER_OF_SHORT_TERM_REF_PIC_SETS_OUT_OF_RANGE=1014
+ DE265_WARNING_SHORT_TERM_REF_PIC_SET_OUT_OF_RANGE=1015
+ DE265_WARNING_FAULTY_REFERENCE_PICTURE_LIST=1016
+ DE265_WARNING_EOSS_BIT_NOT_SET=1017
+ DE265_WARNING_MAX_NUM_REF_PICS_EXCEEDED=1018
+ DE265_WARNING_INVALID_CHROMA_FORMAT=1019
+ DE265_WARNING_SLICE_SEGMENT_ADDRESS_INVALID=1020
+ DE265_WARNING_DEPENDENT_SLICE_WITH_ADDRESS_ZERO=1021
+ DE265_WARNING_NUMBER_OF_THREADS_LIMITED_TO_MAXIMUM=1022
+ DE265_NON_EXISTING_LT_REFERENCE_CANDIDATE_IN_SLICE_HEADER=1023
+ DE265_WARNING_CANNOT_APPLY_SAO_OUT_OF_MEMORY=1024
+ DE265_WARNING_SPS_MISSING_CANNOT_DECODE_SEI=1025
+ DE265_WARNING_COLLOCATED_MOTION_VECTOR_OUTSIDE_IMAGE_AREA=1026
libde265 = ctypes.cdll.LoadLibrary("libde265.so.0")
@@ -117,7 +133,7 @@ class Decoder:
def __del__(self):
libde265.de265_free_decoder(self.ctx_)
-
+
def get_error_str(self, code):
return libde265.de265_get_error_text(code).decode("ascii")
@@ -148,21 +164,21 @@ class Decoder:
def decode(self):
err = libde265.de265_decode(self.ctx_, self.more_)
- if err and err != DE265_ERROR_WAITING_FOR_INPUT_DATA:
+ if err and err != libde265error.DE265_ERROR_WAITING_FOR_INPUT_DATA:
raise Exception(self.get_error_str(err))
-
+
return self.more_.value != 0
def flush_data(self):
- libde265.flush_data(self.ctx_)
+ err = libde265.de265_flush_data(self.ctx_)
+
+ if err:
+ raise Exception(self.get_error_str(err))
def get_next_picture(self):
'''
- Returns next decoded frame. Image in YCrCb format. If no frame available
+ Returns next decoded frame. Image in YCbCr format. If no frame available
returns None.
-
- TODO: Skimage's ycrcb2rgb() does not look correct. Is Cr/Cb channel
- created correctly?
'''
img = libde265.de265_get_next_picture(self.ctx_)
@@ -172,20 +188,19 @@ class Decoder:
res = np.zeros((self.size_[0], self.size_[1], 3), dtype=np.uint8)
for c in range(0, 3):
- size = (libde265.de265_get_image_height(img, c), libde265.de265_get_image_width(img, c))
- bpp = libde265.de265_get_bits_per_pixel(img, c)
- img_ptr = libde265.de265_get_image_plane(img, c, self.out_stride_)
- scale_y = self.size_[0] / size[0]
- scale_x = self.size_[1] / size[1]
+ size = (libde265.de265_get_image_height(img, c),
+ libde265.de265_get_image_width(img, c))
+ bpp = libde265.de265_get_bits_per_pixel(img, c)
+
if bpp != 8:
raise NotImplementedError("unsupported bits per pixel %i" % bpp)
- if scale_x != scale_y:
- raise NotImplementedError("unsupported subsampling")
+ img_ptr = libde265.de265_get_image_plane(img, c, self.out_stride_)
+
+ ch = np.frombuffer(img_ptr[:size[0] * size[1]], dtype=np.uint8)
+ ch.shape = size
- channel = np.asarray(bytearray(img_ptr[:size[0] * size[1]]), dtype=np.uint8)
- channel.shape = size
- res[:,:,c] = (rescale(channel, scale_x) * 255).astype(np.uint8)
+ res[:,:,c] = resize(ch, self.size_)
- return res
\ No newline at end of file
+ return res