}
case FOURCC_mjp2:
{
- GNode *jp2h, *colr, *mjp2, *field, *prefix;
+ /* see annex I of the jpeg2000 spec */
+ GNode *jp2h, *ihdr, *colr, *mjp2, *field, *prefix, *cmap, *cdef;
const guint8 *data;
guint32 fourcc = 0;
+ gint ncomp = 0;
+ guint32 ncomp_map = 0;
+ gint32 *comp_map = NULL;
+ guint32 nchan_def = 0;
+ gint32 *chan_def = NULL;
GST_DEBUG_OBJECT (qtdemux, "found mjp2");
/* some required atoms */
jp2h = qtdemux_tree_get_child_by_type (mjp2, FOURCC_jp2h);
if (!jp2h)
break;
+
+ /* number of components; redundant with info in codestream, but useful
+ to a muxer */
+ ihdr = qtdemux_tree_get_child_by_type (jp2h, FOURCC_ihdr);
+ if (!ihdr || QT_UINT32 (ihdr->data) != 22)
+ break;
+ ncomp = QT_UINT16 (((guint8 *) ihdr->data) + 16);
+
colr = qtdemux_tree_get_child_by_type (jp2h, FOURCC_colr);
if (!colr)
break;
GST_DEBUG_OBJECT (qtdemux, "found colr");
- /* try to extract colour space info */
+ /* extract colour space info */
if (QT_UINT8 ((guint8 *) colr->data + 8) == 1) {
switch (QT_UINT32 ((guint8 *) colr->data + 11)) {
case 16:
break;
}
}
+ if (!fourcc)
+ /* colr is required, and only values 16, 17, and 18 are specified,
+ so error if we have no fourcc */
+ break;
- if (fourcc)
- gst_caps_set_simple (stream->caps,
- "fourcc", GST_TYPE_FOURCC, fourcc, NULL);
+ /* extract component mapping */
+ cmap = qtdemux_tree_get_child_by_type (jp2h, FOURCC_cmap);
+ if (cmap) {
+ guint32 cmap_len = 0;
+ int i;
+ cmap_len = QT_UINT32 (cmap->data);
+ if (cmap_len >= 8) {
+ /* normal box, subtract off header */
+ cmap_len -= 8;
+ /* cmap: { u16 cmp; u8 mtyp; u8 pcol; }* */
+ if (cmap_len % 4 == 0) {
+ ncomp_map = (cmap_len / 4);
+ comp_map = g_new0 (gint32, ncomp_map);
+ for (i = 0; i < ncomp_map; i++) {
+ guint16 cmp;
+ guint8 mtyp, pcol;
+ cmp = QT_UINT16 (((guint8 *) cmap->data) + 8 + i * 4);
+ mtyp = QT_UINT8 (((guint8 *) cmap->data) + 8 + i * 4 + 2);
+ pcol = QT_UINT8 (((guint8 *) cmap->data) + 8 + i * 4 + 3);
+ comp_map[i] = (mtyp << 24) | (pcol << 16) | cmp;
+ }
+ }
+ }
+ }
+ /* extract channel definitions */
+ cdef = qtdemux_tree_get_child_by_type (jp2h, FOURCC_cdef);
+ if (cdef) {
+ guint32 cdef_len = 0;
+ int i;
+ cdef_len = QT_UINT32 (cdef->data);
+ if (cdef_len >= 10) {
+ /* normal box, subtract off header and len */
+ cdef_len -= 10;
+ /* cdef: u16 n; { u16 cn; u16 typ; u16 asoc; }* */
+ if (cdef_len % 6 == 0) {
+ nchan_def = (cdef_len / 6);
+ chan_def = g_new0 (gint32, nchan_def);
+ for (i = 0; i < nchan_def; i++)
+ chan_def[i] = -1;
+ for (i = 0; i < nchan_def; i++) {
+ guint16 cn, typ, asoc;
+ cn = QT_UINT16 (((guint8 *) cdef->data) + 10 + i * 6);
+ typ = QT_UINT16 (((guint8 *) cdef->data) + 10 + i * 6 + 2);
+ asoc = QT_UINT16 (((guint8 *) cdef->data) + 10 + i * 6 + 4);
+ if (cn < nchan_def) {
+ switch (typ) {
+ case 0:
+ chan_def[cn] = asoc;
+ break;
+ case 1:
+ chan_def[cn] = 0; /* alpha */
+ break;
+ default:
+ chan_def[cn] = -typ;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ gst_caps_set_simple (stream->caps,
+ "num-components", G_TYPE_INT, ncomp, NULL);
+ gst_caps_set_simple (stream->caps,
+ "fourcc", GST_TYPE_FOURCC, fourcc, NULL);
+
+ if (comp_map) {
+ GValue arr = { 0, };
+ GValue elt = { 0, };
+ int i;
+ g_value_init (&arr, GST_TYPE_ARRAY);
+ g_value_init (&elt, G_TYPE_INT);
+ for (i = 0; i < ncomp_map; i++) {
+ g_value_set_int (&elt, comp_map[i]);
+ gst_value_array_append_value (&arr, &elt);
+ }
+ gst_structure_set_value (gst_caps_get_structure (stream->caps, 0),
+ "component-map", &arr);
+ g_value_unset (&elt);
+ g_value_unset (&arr);
+ g_free (comp_map);
+ }
+
+ if (chan_def) {
+ GValue arr = { 0, };
+ GValue elt = { 0, };
+ int i;
+ g_value_init (&arr, GST_TYPE_ARRAY);
+ g_value_init (&elt, G_TYPE_INT);
+ for (i = 0; i < nchan_def; i++) {
+ g_value_set_int (&elt, chan_def[i]);
+ gst_value_array_append_value (&arr, &elt);
+ }
+ gst_structure_set_value (gst_caps_get_structure (stream->caps, 0),
+ "channel-definitions", &arr);
+ g_value_unset (&elt);
+ g_value_unset (&arr);
+ g_free (chan_def);
+ }
/* some optional atoms */
field = qtdemux_tree_get_child_by_type (mjp2, FOURCC_fiel);
/* ISO Motion JPEG 2000 fourcc */
#define FOURCC_mjp2 GST_MAKE_FOURCC('m','j','p','2')
#define FOURCC_jp2h GST_MAKE_FOURCC('j','p','2','h')
+#define FOURCC_ihdr GST_MAKE_FOURCC('i','h','d','r')
#define FOURCC_colr GST_MAKE_FOURCC('c','o','l','r')
#define FOURCC_fiel GST_MAKE_FOURCC('f','i','e','l')
#define FOURCC_jp2x GST_MAKE_FOURCC('j','p','2','x')
+#define FOURCC_cmap GST_MAKE_FOURCC('c','m','a','p')
+#define FOURCC_cdef GST_MAKE_FOURCC('c','d','e','f')
/* some buggy hardware's notion of mdhd */
#define FOURCC_mhdr GST_MAKE_FOURCC('m','h','d','r')