static GstFlowReturn
gst_wavenc_write_tags (GstWavEnc * wavenc)
{
const GstTagList *user_tags;
GstTagList *tags;
guint size;
GstBuffer *buf;
GstByteWriter bw;
g_return_val_if_fail (wavenc != NULL, GST_FLOW_OK);
user_tags = gst_tag_setter_get_tag_list (GST_TAG_SETTER (wavenc));
if ((!wavenc->tags) && (!user_tags)) {
GST_DEBUG_OBJECT (wavenc, "have no tags");
return GST_FLOW_OK;
}
tags =
gst_tag_list_merge (user_tags, wavenc->tags,
gst_tag_setter_get_tag_merge_mode (GST_TAG_SETTER (wavenc)));
GST_DEBUG_OBJECT (wavenc, "writing tags");
gst_byte_writer_init_with_size (&bw, 1024, FALSE);
/* add LIST INFO chunk */
gst_byte_writer_put_data (&bw, (const guint8 *) "LIST", 4);
gst_byte_writer_put_uint32_le (&bw, 0);
gst_byte_writer_put_data (&bw, (const guint8 *) "INFO", 4);
/* add tags */
gst_tag_list_foreach (tags, gst_wavparse_tags_foreach, &bw);
/* sets real size of LIST INFO chunk */
size = gst_byte_writer_get_pos (&bw);
gst_byte_writer_set_pos (&bw, 4);
gst_byte_writer_put_uint32_le (&bw, size - 8);
gst_tag_list_unref (tags);
buf = gst_byte_writer_reset_and_get_buffer (&bw);
wavenc->meta_length += gst_buffer_get_size (buf);
return gst_pad_push (wavenc->srcpad, buf);
}
static void
gst_exif_tag_rewrite_offsets (GstExifWriter * writer, guint32 base_offset)
{
guint32 offset;
GST_LOG ("Rewriting tag entries offsets");
offset = gst_byte_writer_get_size (&writer->tagwriter);
while (gst_byte_writer_get_pos (&writer->tagwriter) <
gst_byte_writer_get_size (&writer->tagwriter)) {
guint16 type = 0;
guint32 cur_offset = 0;
GstByteReader *reader;
gint byte_size = 0;
guint32 count = 0;
guint16 tag_id = 0;
reader = (GstByteReader *) & writer->tagwriter;
/* read the type */
if (writer->byte_order == G_LITTLE_ENDIAN) {
if (!gst_byte_reader_get_uint16_le (reader, &tag_id))
break;
if (!gst_byte_reader_get_uint16_le (reader, &type))
break;
if (!gst_byte_reader_get_uint32_le (reader, &count))
break;
} else {
if (!gst_byte_reader_get_uint16_be (reader, &tag_id))
break;
if (!gst_byte_reader_get_uint16_be (reader, &type))
break;
if (!gst_byte_reader_get_uint32_be (reader, &count))
break;
}
switch (type) {
case EXIF_TYPE_BYTE:
case EXIF_TYPE_ASCII:
case EXIF_TYPE_UNDEFINED:
byte_size = count;
break;
case EXIF_TYPE_SHORT:
byte_size = count * 2; /* 2 bytes */
break;
case EXIF_TYPE_LONG:
case EXIF_TYPE_SLONG:
byte_size = count * 4; /* 4 bytes */
break;
case EXIF_TYPE_RATIONAL:
case EXIF_TYPE_SRATIONAL:
byte_size = count * 8; /* 8 bytes */
break;
default:
g_assert_not_reached ();
break;
}
/* adjust the offset if needed */
if (byte_size > 4 || tag_id == EXIF_GPS_IFD_TAG) {
if (writer->byte_order == G_LITTLE_ENDIAN) {
if (gst_byte_reader_peek_uint32_le (reader, &cur_offset)) {
gst_byte_writer_put_uint32_le (&writer->tagwriter,
cur_offset + offset + base_offset);
}
} else {
if (gst_byte_reader_peek_uint32_be (reader, &cur_offset)) {
gst_byte_writer_put_uint32_be (&writer->tagwriter,
cur_offset + offset + base_offset);
}
}
GST_DEBUG ("Rewriting tag offset from %u to (%u + %u + %u) %u",
cur_offset, cur_offset, offset, base_offset,
cur_offset + offset + base_offset);
} else {
gst_byte_reader_skip (reader, 4);
GST_DEBUG ("No need to rewrite tag offset");
}
}
}
static gboolean
flx_decode_delta_flc (GstFlxDec * flxdec, GstByteReader * reader,
GstByteWriter * writer)
{
guint16 lines, start_l;
g_return_val_if_fail (flxdec != NULL, FALSE);
g_return_val_if_fail (flxdec->delta_data != NULL, FALSE);
/* use last frame for delta */
if (!gst_byte_writer_put_data (writer, flxdec->delta_data, flxdec->size))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &lines))
goto error;
if (lines > flxdec->hdr.height) {
GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. too many lines.");
return FALSE;
}
start_l = lines;
while (lines) {
guint16 opcode;
if (!gst_byte_writer_set_pos (writer,
flxdec->hdr.width * (start_l - lines)))
goto error;
/* process opcode(s) */
while (TRUE) {
if (!gst_byte_reader_get_uint16_le (reader, &opcode))
goto error;
if ((opcode & 0xc000) == 0)
break;
if ((opcode & 0xc000) == 0xc000) {
/* line skip count */
gulong skip = (0x10000 - opcode);
if (skip > flxdec->hdr.height) {
GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. "
"skip line count too big.");
return FALSE;
}
start_l += skip;
if (!gst_byte_writer_set_pos (writer,
gst_byte_writer_get_pos (writer) + flxdec->hdr.width * skip))
goto error;
} else {
/* last pixel */
if (!gst_byte_writer_set_pos (writer,
gst_byte_writer_get_pos (writer) + flxdec->hdr.width))
goto error;
if (!gst_byte_writer_put_uint8 (writer, opcode & 0xff))
goto error;
}
}
/* last opcode is the packet count */
GST_LOG_OBJECT (flxdec, "have %d packets", opcode);
while (opcode--) {
/* skip count */
guint8 skip;
gint8 count;
if (!gst_byte_reader_get_uint8 (reader, &skip))
goto error;
if (!gst_byte_writer_set_pos (writer,
gst_byte_writer_get_pos (writer) + skip))
goto error;
/* RLE count */
if (!gst_byte_reader_get_int8 (reader, &count))
goto error;
if (count < 0) {
guint16 x;
/* replicate word run */
count = ABS (count);
GST_LOG_OBJECT (flxdec, "have replicate run of size %d at offset %d",
count, skip);
if (skip + count > flxdec->hdr.width) {
GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. "
"line too long.");
return FALSE;
}
if (!gst_byte_reader_get_uint16_le (reader, &x))
goto error;
while (count--) {
if (!gst_byte_writer_put_uint16_le (writer, x)) {
goto error;
}
}
} else {
GST_LOG_OBJECT (flxdec, "have literal run of size %d at offset %d",
count, skip);
if (skip + count > flxdec->hdr.width) {
GST_ERROR_OBJECT (flxdec, "Invalid FLC packet detected. "
"line too long.");
return FALSE;
}
while (count--) {
guint16 x;
if (!gst_byte_reader_get_uint16_le (reader, &x))
goto error;
if (!gst_byte_writer_put_uint16_le (writer, x))
goto error;
}
}
}
lines--;
}
return TRUE;
error:
GST_ERROR_OBJECT (flxdec, "Failed to decode FLI packet");
return FALSE;
}
static gboolean
flx_decode_delta_fli (GstFlxDec * flxdec, GstByteReader * reader,
GstByteWriter * writer)
{
guint16 start_line, lines;
guint line_start_i;
g_return_val_if_fail (flxdec != NULL, FALSE);
g_return_val_if_fail (flxdec->delta_data != NULL, FALSE);
/* use last frame for delta */
if (!gst_byte_writer_put_data (writer, flxdec->delta_data, flxdec->size))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &start_line))
goto error;
if (!gst_byte_reader_get_uint16_le (reader, &lines))
goto error;
GST_LOG_OBJECT (flxdec, "height %d start line %d line count %d",
flxdec->hdr.height, start_line, lines);
if (start_line + lines > flxdec->hdr.height) {
GST_ERROR_OBJECT (flxdec, "Invalid FLI packet detected. too many lines.");
return FALSE;
}
line_start_i = flxdec->hdr.width * start_line;
if (!gst_byte_writer_set_pos (writer, line_start_i))
goto error;
while (lines--) {
guint8 packets;
/* packet count */
if (!gst_byte_reader_get_uint8 (reader, &packets))
goto error;
GST_LOG_OBJECT (flxdec, "have %d packets", packets);
while (packets--) {
/* skip count */
guint8 skip;
gint8 count;
if (!gst_byte_reader_get_uint8 (reader, &skip))
goto error;
/* skip bytes */
if (!gst_byte_writer_set_pos (writer,
gst_byte_writer_get_pos (writer) + skip))
goto error;
/* RLE count */
if (!gst_byte_reader_get_int8 (reader, &count))
goto error;
if (count < 0) {
guint8 x;
/* literal run */
count = ABS (count);
GST_LOG_OBJECT (flxdec, "have literal run of size %d at offset %d",
count, skip);
if (skip + count > flxdec->hdr.width) {
GST_ERROR_OBJECT (flxdec, "Invalid FLI packet detected. "
"line too long.");
return FALSE;
}
if (!gst_byte_reader_get_uint8 (reader, &x))
goto error;
if (!gst_byte_writer_fill (writer, x, count))
goto error;
} else {
const guint8 *data;
GST_LOG_OBJECT (flxdec, "have replicate run of size %d at offset %d",
count, skip);
if (skip + count > flxdec->hdr.width) {
GST_ERROR_OBJECT (flxdec, "Invalid FLI packet detected. "
"line too long.");
return FALSE;
}
/* replicate run */
if (!gst_byte_reader_get_data (reader, count, &data))
goto error;
if (!gst_byte_writer_put_data (writer, data, count))
goto error;
}
}
line_start_i += flxdec->hdr.width;
if (!gst_byte_writer_set_pos (writer, line_start_i))
goto error;
}
return TRUE;
error:
GST_ERROR_OBJECT (flxdec, "Failed to decode FLI packet");
return FALSE;
}
