static PyObject *
_wrap_gst_tag_list_from_exif_buffer_with_tiff_header(PyObject *self, PyObject *args, PyObject *kwargs)
{
static char *kwlist[] = { "buffer", NULL };
PyObject *py_buffer;
GstTagList *ret;
const GstBuffer *buffer;
if (!PyArg_ParseTupleAndKeywords(args, kwargs,"O:tag_list_from_exif_buffer_with_tiff_header", kwlist, &py_buffer))
return NULL;
buffer = GST_BUFFER(pygstminiobject_get (py_buffer));
if (PyErr_Occurred())
return NULL;
pyg_begin_allow_threads;
ret = gst_tag_list_from_exif_buffer_with_tiff_header(buffer);
pyg_end_allow_threads;
/* pyg_boxed_new handles NULL checking */
return pyg_boxed_new(GST_TYPE_TAG_LIST, (GstTagList*) ret, TRUE, TRUE);
}
/* Ideas from gstjpegparse.c */
GstTagList *
gst_droidcamsrc_exif_tags_from_jpeg_data (void *data, size_t size)
{
GstByteReader reader;
guint16 len = 0;
const gchar *id;
const guint8 *exif = NULL;
GstBuffer *buff;
GstTagList *tags = NULL;
void *app1 = memmem (data, size, marker, 2);
if (!app1) {
GST_ERROR ("No tags found");
goto out;
}
size -= (app1 - data);
gst_byte_reader_init (&reader, app1, size);
if (!gst_byte_reader_skip (&reader, 2)) {
GST_ERROR ("Not enough jpeg data for tags");
goto out;
}
if (!gst_byte_reader_get_uint16_be (&reader, &len)) {
GST_ERROR ("Failed to get APP1 size");
goto out;
}
len -= 2; /* for the marker itself */
if (!gst_byte_reader_peek_string_utf8 (&reader, &id)) {
goto out;
}
if (!strncmp (id, "Exif", 4)) {
/* id + NUL + padding */
if (!gst_byte_reader_skip (&reader, 6)) {
goto out;
}
len -= 6;
if (!gst_byte_reader_get_data (&reader, len, &exif)) {
goto out;
}
buff =
gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY, (gpointer) exif,
len, 0, len, NULL, NULL);
tags = gst_tag_list_from_exif_buffer_with_tiff_header (buff);
gst_buffer_unref (buff);
return tags;
}
out:
return NULL;
}
GstTagList *
gst_droidcamsrc_exif_tags_from_jpeg_data (void *data, size_t size)
{
GstTagList *tags = NULL;
ExifMem *mem = exif_mem_new (g_malloc0, g_realloc, g_free);
ExifData *exif = exif_data_new_mem (mem);
unsigned char *exif_data = NULL;
void *_exif_data = NULL;
unsigned int exif_data_size = 0;
GstBuffer *buffer;
ExifEntry *iso;
int x, i;
exif_data_load_data (exif, data, size);
exif_data_set_data_type (exif, EXIF_DATA_TYPE_COMPRESSED);
exif_data_save_data (exif, &exif_data, &exif_data_size);
if (!exif_data_size) {
goto out;
}
if (exif_data_size <= 6) {
goto out;
}
/* dump the data. based on libexif code */
for (x = 0; x < EXIF_IFD_COUNT; x++) {
if (exif->ifd[x] && exif->ifd[x]->count) {
for (i = 0; i < exif->ifd[x]->count; i++) {
char val[1024];
ExifEntry *e = exif->ifd[x]->entries[i];
GST_LOG ("Exif IFD: %s. Tag 0x%x (%s) = %s", exif_ifd_get_name (x),
e->tag, exif_tag_get_name_in_ifd (e->tag, exif_entry_get_ifd (e)),
exif_entry_get_value (e, val, sizeof (val)));
}
}
}
_exif_data = exif_data;
exif_data += 6;
exif_data_size -= 6;
buffer = gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY,
exif_data, exif_data_size, 0, exif_data_size, NULL, NULL);
tags = gst_tag_list_from_exif_buffer_with_tiff_header (buffer);
gst_buffer_unref (buffer);
/* We don't want these tags */
gst_tag_list_remove_tag (tags, GST_TAG_DEVICE_MANUFACTURER);
gst_tag_list_remove_tag (tags, GST_TAG_DEVICE_MODEL);
gst_tag_list_remove_tag (tags, GST_TAG_APPLICATION_NAME);
gst_tag_list_remove_tag (tags, GST_TAG_DATE_TIME);
/* we have a mess with ISO so we will just behave as N9 */
iso = exif_content_get_entry (exif->ifd[EXIF_IFD_EXIF],
EXIF_TAG_ISO_SPEED_RATINGS);
if (iso) {
#ifdef __arm__
guint16 val = exif_get_short (iso->data, EXIF_BYTE_ORDER_MOTOROLA);
#else
guint16 val = exif_get_short (iso->data, EXIF_BYTE_ORDER_INTEL);
#endif
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE,
GST_TAG_CAPTURING_ISO_SPEED, val, NULL);
}
/* TODO: the following are being dropped
*
* 0x213 EXIF_TAG_YCBCR_POSITIONING
* 0x9004 EXIF_TAG_DATE_TIME_DIGITIZED
* 0x9101 EXIF_TAG_COMPONENTS_CONFIGURATION
* 0xa001 EXIF_TAG_COLOR_SPACE
* 0xa002 EXIF_TAG_PIXEL_X_DIMENSION
* 0xa003 EXIF_TAG_PIXEL_Y_DIMENSION
* 0xa005 EXIF_TAG_INTEROPERABILITY_IFD_POINTER
* thumbnail.
* 0x100 EXIF_TAG_IMAGE_WIDTH
* 0x101 EXIF_TAG_IMAGE_LENGTH
* 0x9203 EXIF_TAG_BRIGHTNESS_VALUE
* 0x9205 EXIF_TAG_MAX_APERTURE_VALUE
* 0x9206 EXIF_TAG_SUBJECT_DISTANCE
* 0x9208 EXIF_TAG_LIGHT_SOURCE
* 0x9286 EXIF_TAG_USER_COMMENT
*/
out:
if (_exif_data) {
exif_mem_free (mem, _exif_data);
}
if (exif) {
exif_data_free (exif);
}
exif_mem_unref (mem);
return tags;
}
