libheif/context.cc (37 lines):
	- line 82: // TODO: error handling
	- line 600: // TODO: err
	- line 836: // TODO: apply irot to camera extrinsic matrix
	- line 1072: continue; // TODO: can this every happen?
	- line 1371: // TODO: what about overlays ?
	- line 1392: // TODO: check whether this really can be recursive (e.g. overlay of grid images)
	- line 1456: // TODO: this should be codec specific. JPEG 2000, for example, can use RGB internally.
	- line 1551: // TODO: check BPP changed
	- line 2025: // TODO: this if statement is probably wrong. When we have a tiled image with alpha
	- line 2041: // TODO: check that sizes are the same and that we have an Y channel
	- line 2060: // TODO: we should include a decoding option to control whether libheif should automatically scale the alpha channel, and if so, which scaling filter (enum: Off, NN, Bilinear, ...).
	- line 2184: /* TODO: in the future, we might support RGB and mono as intermediate formats
	- line 2220: // TODO: is this really an error? Does the pixi depths refer to RGB or YCbCr?
	- line 2574: heif_colorspace_RGB, heif_chroma_undefined, options, false); // TODO: always RGB ?
	- line 2596: /* TODO: probably, it is valid that an iovl image has no references ?
	- line 2626: // TODO: seems we always have to compose this in RGB since the background color is an RGB value
	- line 2631: img->add_plane(heif_channel_R, w, h, 8); // TODO: other bit depths
	- line 2632: img->add_plane(heif_channel_G, w, h, 8); // TODO: other bit depths
	- line 2633: img->add_plane(heif_channel_B, w, h, 8); // TODO: other bit depths
	- line 2647: heif_colorspace_RGB, heif_chroma_undefined, options, false); // TODO: always RGB? Probably yes, because of RGB background color.
	- line 2804: // TODO: the hdlr box is not the right place for comments
	- line 3041: // TODO: are the colour primaries relevant for matrix-coefficients != 12,13 ?
	- line 3105: // @TODO: use color profile when converting
	- line 3315: // TODO: can we directly code a monochrome image instead of the dummy color channels?
	- line 3338: // TODO: MIAF says that the *:hevc:* urn is deprecated and we should use "urn:mpeg:mpegB:cicp:systems:auxiliary:alpha"
	- line 3376: // @TODO: use color profile when converting
	- line 3540: // TODO: can we directly code a monochrome image instead of the dummy color channels?
	- line 3563: // TODO: MIAF says that the *:hevc:* urn is deprecated and we should use "urn:mpeg:mpegB:cicp:systems:auxiliary:alpha"
	- line 3603: // @TODO: use color profile when converting
	- line 3637: // TODO: can we directly code a monochrome image instead of the dummy color channels?
	- line 3666: // TODO: maybe we can remove this later.
	- line 3757: // TODO: simplify the color-conversion part. It's the same for each codec.
	- line 3801: // TODO: can we directly code a monochrome image instead of the dummy color channels?
	- line 3927: // @TODO: use color profile when converting
	- line 3961: // TODO: can we directly code a monochrome image instead of the dummy color channels?
	- line 4035: // TODO: extract 'jpgC' header data
	- line 4294: // TODO: error, compression not supported


libheif/box.cc (20 lines):
	- line 241: // TODO: return recoverable error at timeout
	- line 254: // TODO: return recoverable error at timeout
	- line 278: // TODO: return recoverable error at timeout
	- line 784: // TODO: return recoverable error at timeout
	- line 1009: // TODO: boxes until end of file (we will probably never need this)
	- line 2324: // TODO: this function should always append the data to the output vector as this is used when
	- line 2359: // TODO: I think we should not clear this. Maybe we want to try reading again later and
	- line 2372: // TODO: maybe we should introduce some 'Recoverable error' instead of 'Invalid input'
	- line 2440: // TODO: return error: construction methods do not match
	- line 2527: m_base_offset_size = 4; // TODO: or could be 8 if we write >4GB files
	- line 2613: // TODO: box size > 4 GB
	- line 2876: // TODO: there are several images in circulation that have an iinf version=2. We should not enforce this with a hard error.
	- line 2895: // TODO: Only try to read "item_count" children.
	- line 3000: // TODO: return recoverable error at timeout
	- line 3038: // TODO: error
	- line 3355: // TODO: is there any specification of allowed values for the ipma version in the HEIF standards?
	- line 3507: // TODO: error, too many associations
	- line 3910: // TODO: implement the infinite recursion detection in a different way. E.g. by passing down
	- line 4144: // TODO: maybe we should introduce some 'Recoverable error' instead of 'Invalid input'
	- line 4361: // TODO return Error(


libheif/file.cc (13 lines):
	- line 56: // TODO: make this a decoder option
	- line 365: // TODO: this design should be cleaned up
	- line 772: return 8; // TODO: what shall we do if the bit-depth is unknown? Use PIXI?
	- line 853: return 8; // TODO: what shall we do if the bit-depth is unknown? Use PIXI?
	- line 952: // TODO: I think we should not clear this. Maybe we want to try reading again later and
	- line 962: // TODO: maybe we should introduce some 'Recoverable error' instead of 'Invalid input'
	- line 1195: // TODO: check errors
	- line 1214: // TODO: implement...
	- line 1420: // TODO - Correctly Find the j2kH box
	- line 2032: // TODO: error, compression not supported
	- line 2055: // TODO: brotli
	- line 2076: // TODO: error, compression not supported
	- line 2151: // TODO: the hdlr box is probably not the right place for this. Into which box should we write comments?


libheif/api/libheif/heif.cc (10 lines):
	- line 554: // TODO: heif_error heif_context_read_from_file_descriptor(heif_context*, int fd);
	- line 934: // TODO: for now, also scan the grid tiles for alpha information (issue #708), but depending about
	- line 944: // TODO: what about images that have the alpha in the grid tiles (issue #708) ?
	- line 1199: // TODO: this should return an error in a later version (see below)
	- line 2194: // TODO: handle write errors
	- line 2451: Error err(heif_error_Unsupported_filetype, // TODO: is this the right error code?
	- line 2596: return error_unsupported_parameter; // TODO: correct error ?
	- line 2624: return error_unsupported_parameter; // TODO: correct error ?
	- line 2670: return error_unsupported_parameter; // TODO: correct error ?
	- line 3065: // TODO: Don't repeat this code from heif_context_encode_image()


libheif/codecs/hevc.cc (9 lines):
	- line 346: // TODO: error: too many NAL units
	- line 358: // TODO: error: too many NAL units
	- line 381: // TODO err
	- line 385: // TODO value unspecified
	- line 471: // TODO: load non-uniform response curve
	- line 484: // TODO: we probably do not need a full BitReader just for the array size.
	- line 528: // TODO: loading of multi-byte sei headers
	- line 545: break; // TODO: read next SEI
	- line 686: config->min_spatial_segmentation_idc = 0; // TODO: get this value from the VUI, 0 should be safe


android_jni/app/src/main/include/libheif/heif.h (8 lines):
	- line 1344: // TODO: we need a new API for this function as images can contain both NCLX and ICC at the same time.
	- line 1399: heif_matrix_coefficients_ITU_R_BT_709_5 = 1,  // TODO: or 709-6 according to h.273
	- line 1403: heif_matrix_coefficients_ITU_R_BT_601_6 = 6,  // TODO: or 601-7 according to h.273
	- line 1443: // TODO: This function does currently not return an NCLX profile if it is stored in the image bitstream.
	- line 1758: // TODO: this function does not make any sense yet, since we currently cannot modify existing HEIF files.
	- line 1859: struct heif_error (* write)(struct heif_context* ctx, // TODO: why do we need this parameter?
	- line 1918: int heif_context_get_encoder_descriptors(struct heif_context*, // TODO: why do we need this parameter?
	- line 2064: // TODO: name should be changed to heif_encoder_get_valid_integer_parameter_range


libheif/api/libheif/heif.h (8 lines):
	- line 1344: // TODO: we need a new API for this function as images can contain both NCLX and ICC at the same time.
	- line 1399: heif_matrix_coefficients_ITU_R_BT_709_5 = 1,  // TODO: or 709-6 according to h.273
	- line 1403: heif_matrix_coefficients_ITU_R_BT_601_6 = 6,  // TODO: or 601-7 according to h.273
	- line 1443: // TODO: This function does currently not return an NCLX profile if it is stored in the image bitstream.
	- line 1758: // TODO: this function does not make any sense yet, since we currently cannot modify existing HEIF files.
	- line 1859: struct heif_error (* write)(struct heif_context* ctx, // TODO: why do we need this parameter?
	- line 1918: int heif_context_get_encoder_descriptors(struct heif_context*, // TODO: why do we need this parameter?
	- line 2064: // TODO: name should be changed to heif_encoder_get_valid_integer_parameter_range


libheif/color-conversion/chroma_sampling.cc (8 lines):
	- line 115: // TODO: test with varying bit depths when we have a test image
	- line 223: // TODO: check whether we can use HeifPixelImage::transfer_plane_from_image_as() instead of copying Y and Alpha
	- line 333: // TODO: test with varying bit depths when we have a test image
	- line 421: // TODO: check whether we can use HeifPixelImage::transfer_plane_from_image_as() instead of copying Y and Alpha
	- line 527: // TODO: test with varying bit depths when we have a test image
	- line 697: // TODO: check whether we can use HeifPixelImage::transfer_plane_from_image_as() instead of copying Y and Alpha
	- line 804: // TODO: test with varying bit depths when we have a test image
	- line 920: // TODO: check whether we can use HeifPixelImage::transfer_plane_from_image_as() instead of copying Y and Alpha


libheif/codecs/uncompressed_image.cc (7 lines):
	- line 119: // TODO: error for tile width not multiple of 2
	- line 152: // TODO: error for tile width not multiple of 2
	- line 198: // TODO: throw error if mixed and Cb and Cr are not adjacent.
	- line 300: // TODO: more combinations
	- line 358: // TODO: there are other things we'll need to handle eventually, like palette.
	- line 531: // TODO: see if we can make this const
	- line 742: // TODO: row padding


libheif/color-conversion/yuv2rgb.cc (5 lines):
	- line 119: // TODO: test with varying bit depths when we have a test image
	- line 218: // TODO: check this. I have no input image yet which is known to be correct.
	- line 219: // TODO: is there a coeff=8 with full_range=false ?
	- line 229: else { // TODO: matrix_coefficients = 11,14
	- line 1071: // TODO: test with varying bit depths when we have a test image


libheif/codecs/jpeg2000.cc (5 lines):
	- line 80: // TODO - Check for the presence of a cmap box which specifies channel indices.
	- line 109: //TODO - Handle remaining cases.
	- line 205: // TODO: maybe dump entries too?
	- line 402: // TODO: consider checking for Lsiz consistent with Csiz
	- line 463: // TODO: we should map channels through `cdef` ?


libheif/plugins/encoder_rav1e.cc (4 lines):
	- line 31: #include <iostream>  // TODO: remove me
	- line 40: int quality; // TODO: not sure yet how to map quality to min/max q
	- line 492: chromaPosition = RA_CHROMA_SAMPLE_POSITION_UNKNOWN; // TODO: set to CENTER when AV1 and rav1e supports this
	- line 507: chromaPosition = RA_CHROMA_SAMPLE_POSITION_UNKNOWN; // TODO: set to CENTER when AV1 and rav1e supports this


libheif/plugins/encoder_aom.cc (4 lines):
	- line 779: chroma_sample_position = AOM_CSP_UNKNOWN; // TODO: change this to CSP_CENTER in the future (https://github.com/AOMediaCodec/av1-avif/issues/88)
	- line 983: // TODO: set AV1E_SET_TILE_ROWS and AV1E_SET_TILE_COLUMNS.
	- line 1062: // TODO: split the received data into separate OBUs
	- line 1097: // TODO: split the received data into separate OBUs


fuzzing/color_conversion_fuzzer.cc (3 lines):
	- line 147: // TODO: Add support for more color depths.
	- line 225: // TODO: Support other RGB chromas.
	- line 249: // TODO: also fuzz these parameters.


libheif/plugins/decoder_openjpeg.cc (3 lines):
	- line 284: //TODO - Handle other numbers of components
	- line 289: //TODO - Handle other colorspaces
	- line 372: // TODO: a SIMD implementation to convert int32 to uint8 would speed this up


libheif/plugins/decoder_libde265.cc (3 lines):
	- line 215: // TODO: the size of the NAL unit length variable is defined in the hvcC header.
	- line 249: // TODO: read NCLX from h265 bitstream
	- line 326: // TODO: read NCLX from h265 bitstream


go/heif/heif.go (3 lines):
	- line 429: // TODO: Use reader API internally.
	- line 661: // TODO: EXIF metadata
	- line 1329: // TODO: Might need to be updated for other SubsampleRatio values.


libheif/plugins/encoder_svt.cc (3 lines):
	- line 402: get_value(kParam_qp, qp);  // TODO: what if qp was not set ?
	- line 613: //chromaPosition = RA_CHROMA_SAMPLE_POSITION_UNKNOWN; // TODO: set to CENTER when AV1 and svt supports this
	- line 663: svt_config.high_dynamic_range_input = (bitdepth_y == 10 && // TODO: should this be >8 ?


libheif/api/libheif/heif_cxx.h (2 lines):
	- line 988: nullptr)); // TODO: scaling options not defined yet
	- line 1276: // TODO: this is a bit hacky. It would be better to have an API function to set


libheif/bitstream.cc (2 lines):
	- line 432: // TODO: this is slow
	- line 504: // TODO: activate me once I'm sure this works


libheif/pixelimage.cc (2 lines):
	- line 506: // TODO: check that dst_channel does not exist yet
	- line 655: else { // 16 bit (TODO: unchecked code)


libheif/api/libheif/heif_properties.cc (2 lines):
	- line 362: // TODO: every Box (not just Box_other) should have a get_raw_data() method.
	- line 400: // TODO: every Box (not just Box_other) should have a get_raw_data() method.


scripts/cpplint.py (2 lines):
	- line 2993: _RE_PATTERN_TODO = re.compile(r'^//(\s*)TODO(\(.+?\))?:?(\s|$)?')
	- line 3019: # Checks for common mistakes in TODO comments.


libheif/plugins/encoder_vvenc.cc (2 lines):
	- line 441: // TODO: cleanup memory
	- line 460: // TODO: cleanup memory


libheif/codecs/vvc.cc (2 lines):
	- line 46: // assert(c.ptl_present_flag == false); // TODO   (removed the assert since it will trigger the fuzzers)
	- line 170: // TODO: error


android_jni/app/src/main/include/libheif/heif_cxx.h (2 lines):
	- line 988: nullptr)); // TODO: scaling options not defined yet
	- line 1276: // TODO: this is a bit hacky. It would be better to have an API function to set


libheif/compression_zlib.cc (2 lines):
	- line 55: return {}; // TODO: return error
	- line 68: return {}; // TODO: return error


libheif/nclx.cc (2 lines):
	- line 225: // TODO: return recoverable error at timeout
	- line 390: // TODO: return recoverable error at timeout


libheif/context.h (2 lines):
	- line 37: #include "box.h" // only for color_profile, TODO: maybe move the color_profiles to its own header
	- line 549: // TODO: stable indices are obsolet now...


libheif/plugins/encoder_x265.cc (1 line):
	- line 709: // TODO: There seems to be a bug in x265 where increasing the CTU size between


libheif/plugins_unix.cc (1 line):
	- line 62: return {}; // TODO: return error_cannot_read_plugin_directory;


libheif/plugins/encoder_openjpeg.cc (1 line):
	- line 416: // TODO: should we use this function?


libheif/plugins/encoder_uvg266.cc (1 line):
	- line 422: // TODO: There seems to be a bug in uvg266 where increasing the CTU size between


libheif/codecs/avc.cc (1 line):
	- line 55: // TODO: we don't support this yet


libheif/init.h (1 line):
	- line 33: // TODO: later, we might defer the default plugin initialization to when they are actually used for the first time.


libheif/plugins/encoder_kvazaar.h (1 line):
	- line 26: /* TODO: check whether this is also the case with kvazaar.


libheif/region.cc (1 line):
	- line 101: //     // TODO: this isn't going to work - we can only exit here.


libheif/codecs/mask_image.cc (1 line):
	- line 145: // TODO: we could add an option to lossless-compress this data


libheif/color-conversion/hdr_sdr.cc (1 line):
	- line 184: p_out[y * stride_out + x] = (uint8_t) (in >> shift); // TODO: I think no rounding here, but am not sure.


libheif/exif.cc (1 line):
	- line 119: // TODO: do we have to also scan the next IFD table ?


libheif/file.h (1 line):
	- line 265: // TODO: the hdlr box is probably not the right place for this. Into which box should we write comments?


libheif/color-conversion/colorconversion.cc (1 line):
	- line 449: return nullptr; // TODO: we should return a proper error


libheif/color-conversion/rgb2yuv.cc (1 line):
	- line 726: // TODO: it still is an open question where the 'correct' chroma sample positions are for 4:2:2


libheif/codecs/avif.cc (1 line):
	- line 103: writer.write8(0); // TODO initial_presentation_delay


libheif/codecs/jpeg2000.h (1 line):
	- line 457: // TODO: this is a quick hack. It is more complicated for JPEG2000 because these can be any kind of colorspace (e.g. RGB).


libheif/plugins/encoder_kvazaar.cc (1 line):
	- line 422: // TODO: There seems to be a bug in kvazaar where increasing the CTU size between


libheif/plugins/encoder_jpeg.cc (1 line):
	- line 313: // TODO: support encoding greyscale JPEGs


libheif/plugins/encoder_uvg266.h (1 line):
	- line 26: /* TODO: check whether this is also the case with uvg266.