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vorbistag: Write GST_TAG_IMAGE and GST_TAG_PREVIEW_IMAGE as METADATA_BLOCK_PICTURE

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This is the official, standardized way of embedding images into
vorbiscomments now.
This commit is contained in:
Sebastian Dröge 2011-04-01 12:52:05 +02:00
parent 57ff12bb0d
commit 35064fdc82
1 changed files with 54 additions and 12 deletions
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66
gst-libs/gst/tag/gstvorbistag.c
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@ -38,6 +38,7 @@
#endif
#include <gst/gsttagsetter.h>
#include <gst/base/gstbytereader.h>
#include <gst/base/gstbytewriter.h>
#include "gsttageditingprivate.h"
#include <stdlib.h>
#include <string.h>
@ -518,34 +519,74 @@ typedef struct
MyForEach;
static GList *
gst_tag_to_coverart (const GValue * image_value)
gst_tag_to_metadata_block_picture (const gchar * tag,
const GValue * image_value)
{
gchar *coverart_data, *data_result, *mime_result;
gchar *comment_data, *data_result;
const gchar *mime_type;
guint mime_type_len;
GstStructure *mime_struct;
GstBuffer *buffer;
GList *l = NULL;
GstByteWriter writer;
GstTagImageType image_type = GST_TAG_IMAGE_TYPE_NONE;
gint width = 0, height = 0;
guint8 *metadata_block;
guint metadata_block_len;
g_return_val_if_fail (image_value != NULL, NULL);
buffer = gst_value_get_buffer (image_value);
g_return_val_if_fail (gst_caps_is_fixed (buffer->caps), NULL);
mime_struct = gst_caps_get_structure (buffer->caps, 0);
mime_type = gst_structure_get_name (mime_struct);
if (strcmp (mime_type, "text/uri-list") == 0) {
/* URI reference */
coverart_data = g_strndup ((gchar *) buffer->data, buffer->size);
mime_type = gst_structure_get_name (mime_struct);
if (strcmp (mime_type, "text/uri-list") == 0)
mime_type = "-->";
mime_type_len = strlen (mime_type);
gst_structure_get (mime_struct, "image-type", GST_TYPE_TAG_IMAGE_TYPE,
&image_type, "width", G_TYPE_INT, &width, "height", G_TYPE_INT, &height,
NULL);
metadata_block_len = 32 + mime_type_len + GST_BUFFER_SIZE (buffer);
gst_byte_writer_init_with_size (&writer, metadata_block_len, TRUE);
if (image_type == GST_TAG_IMAGE_TYPE_NONE
&& strcmp (tag, GST_TAG_PREVIEW_IMAGE) == 0) {
gst_byte_writer_put_uint32_be_unchecked (&writer, 0x01);
} else {
coverart_data = g_base64_encode (buffer->data, buffer->size);
/* Convert to ID3v2 APIC image type */
if (image_type == GST_TAG_IMAGE_TYPE_NONE)
image_type = GST_TAG_IMAGE_TYPE_UNDEFINED;
else
image_type = image_type + 2;
gst_byte_writer_put_uint32_be_unchecked (&writer, image_type);
}
data_result = g_strdup_printf ("COVERART=%s", coverart_data);
mime_result = g_strdup_printf ("COVERARTMIME=%s", mime_type);
g_free (coverart_data);
gst_byte_writer_put_uint32_be_unchecked (&writer, mime_type_len);
gst_byte_writer_put_data_unchecked (&writer, (guint8 *) mime_type,
mime_type_len);
/* description length */
gst_byte_writer_put_uint32_be_unchecked (&writer, 0);
gst_byte_writer_put_uint32_be_unchecked (&writer, width);
gst_byte_writer_put_uint32_be_unchecked (&writer, height);
/* color depth */
gst_byte_writer_put_uint32_be_unchecked (&writer, 0);
/* for indexed formats the number of colors */
gst_byte_writer_put_uint32_be_unchecked (&writer, 0);
gst_byte_writer_put_uint32_be_unchecked (&writer, GST_BUFFER_SIZE (buffer));
gst_byte_writer_put_data_unchecked (&writer, GST_BUFFER_DATA (buffer),
GST_BUFFER_SIZE (buffer));
g_assert (gst_byte_writer_get_pos (&writer) == metadata_block_len);
metadata_block = gst_byte_writer_reset_and_get_data (&writer);
comment_data = g_base64_encode (metadata_block, metadata_block_len);
g_free (metadata_block);
data_result = g_strdup_printf ("METADATA_BLOCK_PICTURE=%s", comment_data);
g_free (comment_data);
l = g_list_append (l, data_result);
l = g_list_append (l, mime_result);
return l;
}
@ -580,7 +621,8 @@ gst_tag_to_vorbis_comments (const GstTagList * list, const gchar * tag)
if ((strcmp (tag, GST_TAG_PREVIEW_IMAGE) == 0 &&
gst_tag_list_get_tag_size (list, GST_TAG_IMAGE) == 0) ||
strcmp (tag, GST_TAG_IMAGE) == 0) {
return gst_tag_to_coverart (gst_tag_list_get_value_index (list, tag, 0));
return gst_tag_to_metadata_block_picture (tag,
gst_tag_list_get_value_index (list, tag, 0));
}
if (strcmp (tag, GST_TAG_EXTENDED_COMMENT) != 0) {