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flacenc: fix encoder init error with some GST_TAG_PREVIEW_IMAGEs

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The encoder fails to initialise when we try to set GST_TAG_PREVIEW_IMAGEs
sent to use by qtdemux from iTunes-generated m4a files. We should
not just blindly translate the PREVIEW tag to file icon image types,
but check if the specific conditions required are met (i.e. image
type 1 must be a 32x32 PNG icon, and what we're getting is 500x500).

https://bugzilla.gnome.org/show_bug.cgi?id=776962
This commit is contained in:
Tim-Philipp Müller 2017-01-14 14:58:52 +00:00
parent 64b79b0a96
commit 23fb9ead5d
1 changed files with 32 additions and 7 deletions
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39
ext/flac/gstflacenc.c
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@ -611,10 +611,12 @@ gst_flac_enc_set_metadata (GstFlacEnc * flacenc, GstAudioInfo * info,
GstCaps *caps;
const GstStructure *structure;
GstTagImageType image_type = GST_TAG_IMAGE_TYPE_NONE;
gint i;
gint i, width = 0, height = 0, png_icon_count = 0, other_icon_count = 0;
GstMapInfo map;
for (i = 0; i < n_images + n_preview_images; i++) {
gboolean is_preview_image = (i >= n_images);
if (i < n_images) {
if (!gst_tag_list_get_sample_index (copy, GST_TAG_IMAGE, i, &sample))
continue;
@ -635,17 +637,42 @@ gst_flac_enc_set_metadata (GstFlacEnc * flacenc, GstAudioInfo * info,
flacenc->meta[entries] =
FLAC__metadata_object_new (FLAC__METADATA_TYPE_PICTURE);
GST_LOG_OBJECT (flacenc, "image info: %" GST_PTR_FORMAT, structure);
if (structure)
gst_structure_get (structure, "image-type", GST_TYPE_TAG_IMAGE_TYPE,
&image_type, NULL);
else
image_type = GST_TAG_IMAGE_TYPE_NONE;
GST_LOG_OBJECT (flacenc, "image caps: %" GST_PTR_FORMAT, caps);
structure = gst_caps_get_structure (caps, 0);
gst_structure_get (structure, "width", G_TYPE_INT, &width,
"height", G_TYPE_INT, &height, NULL);
/* Convert to ID3v2 APIC image type */
if (image_type == GST_TAG_IMAGE_TYPE_NONE)
image_type = (i < n_images) ? 0x00 : 0x01;
else
if (image_type == GST_TAG_IMAGE_TYPE_NONE) {
if (is_preview_image) {
/* 1 - 32x32 pixels 'file icon' (PNG only)
* 2 - Other file icon
* There may only be one each of picture type 1 and 2 in a file. */
if (width == 32 && height == 32
&& gst_structure_has_name (structure, "image/png")
&& png_icon_count++ == 0) {
image_type = 1;
} else if (width <= 32 && height <= 32 && ++other_icon_count == 0) {
image_type = 2;
} else {
image_type = 0; /* Other */
}
} else {
image_type = 0; /* Other */
}
} else {
/* GStreamer enum is the same but without the two icon types 1+2 */
image_type = image_type + 2;
}
buffer = gst_sample_get_buffer (sample);
gst_buffer_map (buffer, &map, GST_MAP_READ);
@ -653,11 +680,9 @@ gst_flac_enc_set_metadata (GstFlacEnc * flacenc, GstAudioInfo * info,
map.data, map.size, TRUE);
gst_buffer_unmap (buffer, &map);
/* FIXME: There's no way to set the picture type in libFLAC */
GST_LOG_OBJECT (flacenc, "Setting picture type %d", image_type);
flacenc->meta[entries]->data.picture.type = image_type;
structure = gst_caps_get_structure (caps, 0);
FLAC__metadata_object_picture_set_mime_type (flacenc->meta[entries],
(char *) gst_structure_get_name (structure), TRUE);