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pngdec: Extract icc profiles and send them downstreams for colormanagement elements

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=765927
This commit is contained in:
Andreas Frisch 2017-10-19 16:17:45 +02:00 committed by Sebastian Dröge
parent 6d72ae13fe
commit 9fd988170a
1 changed files with 45 additions and 0 deletions
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45
ext/libpng/gstpngdec.c
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@ -342,6 +342,51 @@ gst_pngdec_caps_create_and_set (GstPngDec * pngdec)
gst_video_codec_state_unref (pngdec->output_state);
}
if ((pngdec->color_type & PNG_COLOR_MASK_COLOR)
&& !(pngdec->color_type & PNG_COLOR_MASK_PALETTE)
&& png_get_valid (pngdec->png, pngdec->info, PNG_INFO_iCCP)) {
png_charp icc_name;
png_bytep icc_profile;
int icc_compression_type;
png_uint_32 icc_proflen = 0;
png_uint_32 ret = png_get_iCCP (pngdec->png, pngdec->info, &icc_name,
&icc_compression_type, &icc_profile, &icc_proflen);
if ((ret & PNG_INFO_iCCP)) {
gpointer gst_icc_prof = g_memdup (icc_profile, icc_proflen);
GstBuffer *tagbuffer = NULL;
GstSample *tagsample = NULL;
GstTagList *taglist = NULL;
GstStructure *info = NULL;
GstCaps *caps;
GST_DEBUG_OBJECT (pngdec, "extracted ICC profile '%s' length=%i",
icc_name, (guint32) icc_proflen);
tagbuffer = gst_buffer_new_wrapped (gst_icc_prof, icc_proflen);
caps = gst_caps_new_empty_simple ("application/vnd.iccprofile");
info = gst_structure_new_empty ("application/vnd.iccprofile");
if (icc_name)
gst_structure_set (info, "icc-name", G_TYPE_STRING, icc_name, NULL);
tagsample = gst_sample_new (tagbuffer, caps, NULL, info);
gst_buffer_unref (tagbuffer);
gst_caps_unref (caps);
taglist = gst_tag_list_new_empty ();
gst_tag_list_add (taglist, GST_TAG_MERGE_APPEND, GST_TAG_ATTACHMENT,
tagsample, NULL);
gst_sample_unref (tagsample);
gst_video_decoder_merge_tags (GST_VIDEO_DECODER (pngdec), taglist,
GST_TAG_MERGE_APPEND);
gst_tag_list_unref (taglist);
}
}
pngdec->output_state =
gst_video_decoder_set_output_state (GST_VIDEO_DECODER (pngdec), format,
width, height, pngdec->input_state);