static int dvbsub_read_2bit_string(uint8_t *destbuf, int dbuf_len,
const uint8_t **srcbuf, int buf_size,
- int non_mod, uint8_t *map_table)
+ int non_mod, uint8_t *map_table, int x_pos)
{
GetBitContext gb;
int bits;
int run_length;
- int pixels_read = 0;
+ int pixels_read = x_pos;
init_get_bits(&gb, *srcbuf, buf_size << 3);
+ destbuf += x_pos;
+
while (get_bits_count(&gb) < buf_size << 3 && pixels_read < dbuf_len) {
bits = get_bits(&gb, 2);
static int dvbsub_read_4bit_string(uint8_t *destbuf, int dbuf_len,
const uint8_t **srcbuf, int buf_size,
- int non_mod, uint8_t *map_table)
+ int non_mod, uint8_t *map_table, int x_pos)
{
GetBitContext gb;
int bits;
int run_length;
- int pixels_read = 0;
+ int pixels_read = x_pos;
init_get_bits(&gb, *srcbuf, buf_size << 3);
+ destbuf += x_pos;
+
while (get_bits_count(&gb) < buf_size << 3 && pixels_read < dbuf_len) {
bits = get_bits(&gb, 4);
static int dvbsub_read_8bit_string(uint8_t *destbuf, int dbuf_len,
const uint8_t **srcbuf, int buf_size,
- int non_mod, uint8_t *map_table)
+ int non_mod, uint8_t *map_table, int x_pos)
{
const uint8_t *sbuf_end = (*srcbuf) + buf_size;
int bits;
int run_length;
- int pixels_read = 0;
+ int pixels_read = x_pos;
+
+ destbuf += x_pos;
while (*srcbuf < sbuf_end && pixels_read < dbuf_len) {
bits = *(*srcbuf)++;
else
map_table = NULL;
- x_pos += dvbsub_read_2bit_string(pbuf + (y_pos * region->width) + x_pos,
- region->width - x_pos, &buf, buf_end - buf,
- non_mod, map_table);
+ x_pos = dvbsub_read_2bit_string(pbuf + (y_pos * region->width),
+ region->width, &buf, buf_end - buf,
+ non_mod, map_table, x_pos);
break;
case 0x11:
if (region->depth < 4) {
else
map_table = NULL;
- x_pos += dvbsub_read_4bit_string(pbuf + (y_pos * region->width) + x_pos,
- region->width - x_pos, &buf, buf_end - buf,
- non_mod, map_table);
+ x_pos = dvbsub_read_4bit_string(pbuf + (y_pos * region->width),
+ region->width, &buf, buf_end - buf,
+ non_mod, map_table, x_pos);
break;
case 0x12:
if (region->depth < 8) {
return;
}
- x_pos += dvbsub_read_8bit_string(pbuf + (y_pos * region->width) + x_pos,
- region->width - x_pos, &buf, buf_end - buf,
- non_mod, NULL);
+ x_pos = dvbsub_read_8bit_string(pbuf + (y_pos * region->width),
+ region->width, &buf, buf_end - buf,
+ non_mod, NULL, x_pos);
break;
case 0x20: