imagecodecs v2023.3.16

[regro-cf-autotick-bot]

It is very likely that the current package version for this feedstock is out of date.

Checklist before merging this PR:

• [ ] Dependencies have been updated if changed: see upstream
• [ ] Tests have passed
• [ ] Updated license if changed and license_file is packaged

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Pending Dependency Version Updates

Here is a list of all the pending dependency version updates for this repo. Please double check all dependencies before merging.

Name	Upstream Version	Current Version
lerc	4.0.1
libjpeg-turbo	9e

Dependency Analysis

We couldn't run dependency analysis due to an internal error in the bot. :/ Help is very welcome!

_{This PR was created by the regro-cf-autotick-bot. The regro-cf-autotick-bot is a service to automatically track the dependency graph, migrate packages, and propose package version updates for conda-forge. Feel free to drop us a line if there are any issues! This PR was generated by https://github.com/regro/cf-scripts/actions/runs/4443892489, please use this URL for debugging.}

[conda-forge-webservices[bot]]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[hmaarrfk]

I think we need to use jpeg turbo with 12 bit. but that is only in beta.

https://github.com/cgohlke/imagecodecs/issues/65

[martindurant]

PING: anything that can be done to unstick this? I would like to see SZIP released.

[hmaarrfk]

Patch out 12 bit jpeg? Or find the appropriate flag to disable this.

I don't want to release pre-release libjpegturbo yet

[martindurant]

@cgohlke , thoughts?

[cgohlke]

I presume removing the 12-bit, 16-bit, and lossless code paths should work (not tested).

diff --git a/imagecodecs/_jpeg8.pyx b/imagecodecs/_jpeg8.pyx
index 09191ac..31a6260 100644
--- a/imagecodecs/_jpeg8.pyx
+++ b/imagecodecs/_jpeg8.pyx
@@ -124,8 +124,6 @@ def jpeg8_encode(
         my_error_mgr err
         jpeg_compress_struct cinfo
         JSAMPROW rowpointer8
-        J12SAMPROW rowpointer12
-        J16SAMPROW rowpointer16
         J_COLOR_SPACE in_color_space = JCS_UNKNOWN
         J_COLOR_SPACE jpeg_color_space = JCS_UNKNOWN
         unsigned long outsize = 0
@@ -139,7 +137,7 @@ def jpeg8_encode(
         int predictor_selection_value = 0

     if not (
-        (src.dtype == numpy.uint8 or src.dtype == numpy.uint16)
+        src.dtype == numpy.uint8
         and src.ndim in (2, 3)
         # src.nbytes < 2 ** 31 and  # limit to 2 GB
         and samples in (1, 3, 4)
@@ -148,21 +146,6 @@ def jpeg8_encode(
     ):
         raise ValueError('invalid data shape, strides, or dtype')

-    if lossless:
-        predictor_selection_value = 1 if predictor is None else predictor
-
-    if bitspersample is not None:
-        if (
-            bitspersample not in (8, 12, 16)
-            or src.itemsize == 1 and bitspersample > 8
-        ):
-            raise ValueError(f'invalid bitspersample {bitspersample}')
-        data_precision = bitspersample
-
-    # if validate and bitspersample == 12 and not _check_range(src):
-    #     # values larger than 12-bit cause segfault
-    #     raise ValueError('all data values must be < 4096')
-
     if colorspace is not None:
         in_color_space = _jcs_colorspace(colorspace)
         if samples not in _jcs_colorspace_samples(in_color_space):
@@ -235,7 +218,6 @@ def jpeg8_encode(
         cinfo.image_height = <JDIMENSION> src.shape[0]
         cinfo.image_width = <JDIMENSION> src.shape[1]
         cinfo.input_components = samples
-        cinfo.data_precision = data_precision

         if in_color_space != JCS_UNKNOWN:
             cinfo.in_color_space = in_color_space
@@ -246,43 +228,27 @@ def jpeg8_encode(
         jpeg_mem_dest(&cinfo, &outbuffer, &outsize)  # must call after defaults
         jpeg_set_quality(&cinfo, quality, 1)

-        if predictor_selection_value > 0:
-            jpeg_enable_lossless(&cinfo, predictor_selection_value, 0)
-        else:
-            if smoothing_factor >= 0:
-                cinfo.smoothing_factor = smoothing_factor
-            if optimize_coding >= 0:
-                cinfo.optimize_coding = <boolean> optimize_coding
-            if h_samp_factor != 0:
-                cinfo.comp_info[0].h_samp_factor = h_samp_factor
-                cinfo.comp_info[0].v_samp_factor = v_samp_factor
-                cinfo.comp_info[1].h_samp_factor = 1
-                cinfo.comp_info[1].v_samp_factor = 1
-                cinfo.comp_info[2].h_samp_factor = 1
-                cinfo.comp_info[2].v_samp_factor = 1
+        if smoothing_factor >= 0:
+            cinfo.smoothing_factor = smoothing_factor
+        if optimize_coding >= 0:
+            cinfo.optimize_coding = <boolean> optimize_coding
+        if h_samp_factor != 0:
+            cinfo.comp_info[0].h_samp_factor = h_samp_factor
+            cinfo.comp_info[0].v_samp_factor = v_samp_factor
+            cinfo.comp_info[1].h_samp_factor = 1
+            cinfo.comp_info[1].v_samp_factor = 1
+            cinfo.comp_info[2].h_samp_factor = 1
+            cinfo.comp_info[2].v_samp_factor = 1

         # TODO: add option to use or return JPEG tables

         jpeg_start_compress(&cinfo, 1)

-        if cinfo.data_precision == 8:
-            while cinfo.next_scanline < cinfo.image_height:
-                rowpointer8 = <JSAMPROW> (
-                    <char*> src.data + cinfo.next_scanline * rowstride
-                )
-                jpeg_write_scanlines(&cinfo, &rowpointer8, 1)
-        elif cinfo.data_precision == 12:
-            while cinfo.next_scanline < cinfo.image_height:
-                rowpointer12 = <J12SAMPROW> (
-                    <char*> src.data + cinfo.next_scanline * rowstride
-                )
-                jpeg12_write_scanlines(&cinfo, &rowpointer12, 1)
-        elif cinfo.data_precision == 16:
-            while cinfo.next_scanline < cinfo.image_height:
-                rowpointer16 = <J16SAMPROW> (
-                    <char*> src.data + cinfo.next_scanline * rowstride
-                )
-                jpeg16_write_scanlines(&cinfo, &rowpointer16, 1)
+        while cinfo.next_scanline < cinfo.image_height:
+            rowpointer8 = <JSAMPROW> (
+                <char*> src.data + cinfo.next_scanline * rowstride
+            )
+            jpeg_write_scanlines(&cinfo, &rowpointer8, 1)

         jpeg_finish_compress(&cinfo)
         jpeg_destroy_compress(&cinfo)
@@ -320,8 +286,6 @@ def jpeg8_decode(
         my_error_mgr err
         jpeg_decompress_struct cinfo
         JSAMPROW rowpointer8
-        J12SAMPROW rowpointer12
-        J16SAMPROW rowpointer16
         J_COLOR_SPACE jpeg_color_space
         J_COLOR_SPACE out_color_space
         JDIMENSION width = 0
@@ -398,31 +362,16 @@ def jpeg8_decode(

             # TODO: allow strides

-            if cinfo.data_precision <= 8:
-                out = _create_array(out, shape, numpy.uint8)
-            else:
-                out = _create_array(out, shape, numpy.uint16)
+            out = _create_array(out, shape, numpy.uint8)
             dst = out
             dstsize = dst.nbytes
             rowstride = dst.strides[0] // dst.itemsize

         memset(<void*> dst.data, 0, dstsize)
-        if cinfo.data_precision <= 8:
-            rowpointer8 = <JSAMPROW> dst.data
-            while cinfo.output_scanline < cinfo.output_height:
-                jpeg_read_scanlines(&cinfo, &rowpointer8, 1)
-                rowpointer8 += rowstride
-        elif cinfo.data_precision == 12:
-            rowpointer12 = <J12SAMPROW> dst.data
-            while cinfo.output_scanline < cinfo.output_height:
-                jpeg12_read_scanlines(&cinfo, &rowpointer12, 1)
-                rowpointer12 += rowstride
-        else:
-            # elif cinfo.data_precision == 16:
-            rowpointer16 = <J16SAMPROW> dst.data
-            while cinfo.output_scanline < cinfo.output_height:
-                jpeg16_read_scanlines(&cinfo, &rowpointer16, 1)
-                rowpointer16 += rowstride
+        rowpointer8 = <JSAMPROW> dst.data
+        while cinfo.output_scanline < cinfo.output_height:
+            jpeg_read_scanlines(&cinfo, &rowpointer8, 1)
+            rowpointer8 += rowstride
         jpeg_finish_decompress(&cinfo)
         jpeg_destroy_decompress(&cinfo)