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avidemux: copy the riff api for ncdt into the element
This chunk is avi specific, no need to expose this as public api.
This commit is contained in:
Stefan Sauer
parent
a4a7dafc32
commit
9a203fceeb
1 changed files with 166 additions and 2 deletions
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@ -53,7 +53,7 @@
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#include "avi-ids.h"
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#include <gst/gst-i18n-plugin.h>
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#include <gst/base/gstadapter.h>
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#include <gst/tag/tag.h>
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#define DIV_ROUND_UP(s,v) (((s) + ((v)-1)) / (v))
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@ -3687,6 +3687,170 @@ non_parsable:
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gst_buffer_unmap (buf, &map);
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}
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static void
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parse_tag_value (GstAviDemux * avi, GstTagList * taglist, const gchar * type,
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guint8 * ptr, guint tsize)
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{
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static const gchar *env_vars[] = { "GST_AVI_TAG_ENCODING",
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"GST_RIFF_TAG_ENCODING", "GST_TAG_ENCODING", NULL
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};
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GType tag_type;
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gchar *val;
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tag_type = gst_tag_get_type (type);
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val = gst_tag_freeform_string_to_utf8 ((gchar *) ptr, tsize, env_vars);
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if (val != NULL) {
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if (tag_type == G_TYPE_STRING) {
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gst_tag_list_add (taglist, GST_TAG_MERGE_APPEND, type, val, NULL);
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} else {
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GValue tag_val = { 0, };
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g_value_init (&tag_val, tag_type);
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if (gst_value_deserialize (&tag_val, val)) {
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gst_tag_list_add_value (taglist, GST_TAG_MERGE_APPEND, type, &tag_val);
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} else {
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GST_WARNING_OBJECT (avi, "could not deserialize '%s' into a "
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"tag %s of type %s", val, type, g_type_name (tag_type));
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}
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g_value_unset (&tag_val);
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}
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g_free (val);
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} else {
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GST_WARNING_OBJECT (avi, "could not extract %s tag", type);
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}
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}
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/*
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* gst_avi_demux_parse_ncdt:
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* @element: caller element (used for debugging/error).
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* @buf: input data to be used for parsing, stripped from header.
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* @taglist: a pointer to a taglist (returned by this function)
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* containing information about this stream. May be
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* NULL if no supported tags were found.
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*
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* Parses Nikon metadata from input data.
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*/
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static void
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gst_avi_demux_parse_ncdt (GstAviDemux * avi, GstBuffer * buf,
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GstTagList ** _taglist)
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{
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GstMapInfo info;
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guint8 *ptr;
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gsize left;
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guint tsize;
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guint32 tag;
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const gchar *type;
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GstTagList *taglist;
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g_return_if_fail (_taglist != NULL);
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if (!buf) {
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*_taglist = NULL;
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return;
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}
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gst_buffer_map (buf, &info, GST_MAP_READ);
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taglist = gst_tag_list_new_empty ();
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ptr = info.data;
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left = info.size;
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while (left > 8) {
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tag = GST_READ_UINT32_LE (ptr);
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tsize = GST_READ_UINT32_LE (ptr + 4);
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GST_MEMDUMP_OBJECT (avi, "tag chunk", ptr, MIN (tsize + 8, left));
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left -= 8;
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ptr += 8;
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GST_DEBUG_OBJECT (avi, "tag %" GST_FOURCC_FORMAT ", size %u",
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GST_FOURCC_ARGS (tag), tsize);
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if (tsize > left) {
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GST_WARNING_OBJECT (avi,
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"Tagsize %d is larger than available data %" G_GSIZE_FORMAT,
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tsize, left);
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tsize = left;
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}
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/* find out the type of metadata */
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switch (tag) {
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case GST_RIFF_LIST_nctg:
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while (tsize > 4) {
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guint16 sub_tag = GST_READ_UINT16_LE (ptr);
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guint16 sub_size = GST_READ_UINT16_LE (ptr + 2);
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tsize -= 4;
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ptr += 4;
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GST_DEBUG_OBJECT (avi, "sub-tag %u, size %u", sub_tag, sub_size);
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/* http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Nikon.html#NCTG
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* for some reason the sub_tag has a +2 offset
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*/
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switch (sub_tag) {
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case 0x03: /* Make */
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type = GST_TAG_DEVICE_MANUFACTURER;
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break;
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case 0x04: /* Model */
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type = GST_TAG_DEVICE_MODEL;
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break;
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/* TODO: 0x05: is software version, like V1.0 */
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case 0x06: /* Software */
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type = GST_TAG_ENCODER;
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break;
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case 0x13: /* CreationDate */
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type = GST_TAG_DATE_TIME;
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if (ptr[4] == ':')
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ptr[4] = '-';
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if (ptr[7] == ':')
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ptr[7] = '-';
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break;
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default:
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type = NULL;
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break;
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}
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if (type != NULL && ptr[0] != '\0') {
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GST_DEBUG_OBJECT (avi, "mapped tag %u to tag %s", sub_tag, type);
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parse_tag_value (avi, taglist, type, ptr, sub_size);
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}
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ptr += sub_size;
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tsize -= sub_size;
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}
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break;
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default:
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type = NULL;
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GST_WARNING_OBJECT (avi,
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"Unknown ncdt (metadata) tag entry %" GST_FOURCC_FORMAT,
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GST_FOURCC_ARGS (tag));
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break;
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}
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if (tsize & 1) {
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tsize++;
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if (tsize > left)
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tsize = left;
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}
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ptr += tsize;
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left -= tsize;
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}
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if (!gst_tag_list_is_empty (taglist)) {
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GST_INFO_OBJECT (avi, "extracted tags: %" GST_PTR_FORMAT, taglist);
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*_taglist = taglist;
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} else {
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*_taglist = NULL;
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gst_tag_list_unref (taglist);
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}
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gst_buffer_unmap (buf, &info);
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return;
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}
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/*
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* Read full AVI headers.
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*/
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@ -3798,7 +3962,7 @@ gst_avi_demux_stream_header_pull (GstAviDemux * avi)
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case GST_RIFF_LIST_ncdt:
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gst_buffer_unmap (sub, &map);
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gst_buffer_resize (sub, 4, -1);
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gst_riff_parse_ncdt (element, sub, &tags);
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gst_avi_demux_parse_ncdt (avi, sub, &tags);
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if (tags) {
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if (avi->globaltags) {
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gst_tag_list_insert (avi->globaltags, tags,
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