/*
- * DVB subtitle decoding for ffmpeg
+ * DVB subtitle decoding
* Copyright (c) 2005 Ian Caulfield
*
* This file is part of FFmpeg.
typedef struct DVBSubCLUT {
int id;
+ int version;
uint32_t clut4[4];
uint32_t clut16[16];
typedef struct DVBSubObject {
int id;
+ int version;
int type;
typedef struct DVBSubRegion {
int id;
+ int version;
int width;
int height;
uint8_t *pbuf;
int buf_size;
+ int dirty;
DVBSubObjectDisplay *display_list;
int composition_id;
int ancillary_id;
+ int version;
int time_out;
DVBSubRegion *region_list;
DVBSubCLUT *clut_list;
ctx->ancillary_id = AV_RB16(avctx->extradata + 2);
}
+ ctx->version = -1;
+
default_clut.id = -1;
default_clut.next = NULL;
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);
}
}
} else if (bits == 1) {
- pixels_read += 2;
if (map_table)
bits = map_table[0];
else
bits = 0;
- if (pixels_read <= dbuf_len) {
- *destbuf++ = bits;
+ run_length = 2;
+ while (run_length-- > 0 && pixels_read < dbuf_len) {
*destbuf++ = bits;
+ pixels_read++;
}
} else {
(*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
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);
}
}
} else if (bits == 1) {
- pixels_read += 2;
if (map_table)
bits = map_table[0];
else
bits = 0;
- if (pixels_read <= dbuf_len) {
- *destbuf++ = bits;
+ run_length = 2;
+ while (run_length-- > 0 && pixels_read < dbuf_len) {
*destbuf++ = bits;
+ pixels_read++;
}
} else {
if (map_table)
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)++;
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff};
uint8_t *map_table;
+#if 0
av_dlog(avctx, "DVB pixel block size %d, %s field:\n", buf_size,
top_bottom ? "bottom" : "top");
if (i % 16)
av_dlog(avctx, "\n");
+#endif
if (region == 0)
return;
pbuf = region->pbuf;
+ region->dirty = 1;
x_pos = display->x_pos;
y_pos = display->y_pos;
- if ((y_pos & 1) != top_bottom)
- y_pos++;
+ y_pos += top_bottom;
while (buf < buf_end) {
- if (x_pos > region->width || y_pos > region->height) {
- av_log(avctx, AV_LOG_ERROR, "Invalid object location!\n");
+ if ((*buf!=0xf0 && x_pos >= region->width) || y_pos >= region->height) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid object location! %d-%d %d-%d %02x\n", x_pos, region->width, y_pos, region->height, *buf);
return;
}
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:
DVBSubContext *ctx = avctx->priv_data;
const uint8_t *buf_end = buf + buf_size;
- const uint8_t *block;
int object_id;
DVBSubObject *object;
DVBSubObjectDisplay *display;
}
for (display = object->display_list; display; display = display->object_list_next) {
- block = buf;
+ const uint8_t *block = buf;
+ int bfl = bottom_field_len;
dvbsub_parse_pixel_data_block(avctx, display, block, top_field_len, 0,
non_modifying_color);
if (bottom_field_len > 0)
block = buf + top_field_len;
else
- bottom_field_len = top_field_len;
+ bfl = top_field_len;
- dvbsub_parse_pixel_data_block(avctx, display, block, bottom_field_len, 1,
+ dvbsub_parse_pixel_data_block(avctx, display, block, bfl, 1,
non_modifying_color);
}
const uint8_t *buf_end = buf + buf_size;
int i, clut_id;
+ int version;
DVBSubCLUT *clut;
int entry_id, depth , full_range;
int y, cr, cb, alpha;
av_dlog(avctx, "\n");
clut_id = *buf++;
+ version = ((*buf)>>4)&15;
buf += 1;
clut = get_clut(ctx, clut_id);
memcpy(clut, &default_clut, sizeof(DVBSubCLUT));
clut->id = clut_id;
+ clut->version = -1;
clut->next = ctx->clut_list;
ctx->clut_list = clut;
}
+ if (clut->version != version) {
+
+ clut->version = version;
+
while (buf + 4 < buf_end) {
entry_id = *buf++;
if (depth & 0x20)
clut->clut256[entry_id] = RGBA(r,g,b,255 - alpha);
}
+ }
}
const uint8_t *buf_end = buf + buf_size;
int region_id, object_id;
+ int version;
DVBSubRegion *region;
DVBSubObject *object;
DVBSubObjectDisplay *display;
region = av_mallocz(sizeof(DVBSubRegion));
region->id = region_id;
+ region->version = -1;
region->next = ctx->region_list;
ctx->region_list = region;
}
+ version = ((*buf)>>4) & 15;
fill = ((*buf++) >> 3) & 1;
region->width = AV_RB16(buf);
region->pbuf = av_malloc(region->buf_size);
fill = 1;
+ region->dirty = 0;
}
region->depth = 1 << (((*buf++) >> 2) & 7);
}
region->clut = *buf++;
- if (region->depth == 8)
+ if (region->depth == 8) {
region->bgcolor = *buf++;
- else {
+ buf += 1;
+ } else {
buf += 1;
if (region->depth == 4)
const uint8_t *buf_end = buf + buf_size;
int region_id;
int page_state;
+ int timeout;
+ int version;
if (buf_size < 1)
return;
- ctx->time_out = *buf++;
+ timeout = *buf++;
+ version = ((*buf)>>4) & 15;
page_state = ((*buf++) >> 2) & 3;
+ if (ctx->version != version) {
+
+ ctx->time_out = timeout;
+ ctx->version = version;
+
av_dlog(avctx, "Page time out %ds, state %d\n", ctx->time_out, page_state);
- if (page_state == 2) {
+ if (page_state == 1 || page_state == 2) {
delete_regions(ctx);
delete_objects(ctx);
delete_cluts(ctx);
av_free(display);
}
+ }
}
sub->rects = av_mallocz(sizeof(*sub->rects) * sub->num_rects);
for(i=0; i<sub->num_rects; i++)
sub->rects[i] = av_mallocz(sizeof(*sub->rects[i]));
- }
i = 0;
for (display = ctx->display_list; display; display = display->next) {
region = get_region(ctx, display->region_id);
- rect = sub->rects[i];
if (!region)
continue;
+ if (!region->dirty)
+ continue;
+
+ rect = sub->rects[i];
rect->x = display->x_pos + offset_x;
rect->y = display->y_pos + offset_y;
rect->w = region->width;
rect->h = region->height;
- rect->nb_colors = 16;
+ rect->nb_colors = (1 << region->depth);
rect->type = SUBTITLE_BITMAP;
rect->pict.linesize[0] = region->width;
}
sub->num_rects = i;
-
+ }
#ifdef DEBUG
save_display_set(ctx);
#endif