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/*
* DVB subtitle decoding for ffmpeg |
406792e7 |
* Copyright (c) 2005 Ian Caulfield |
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* |
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* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/
#include "avcodec.h"
#include "dsputil.h"
#include "bitstream.h" |
04d2e45f |
#include "colorspace.h" |
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//#define DEBUG
//#define DEBUG_PACKET_CONTENTS
//#define DEBUG_SAVE_IMAGES
#define DVBSUB_PAGE_SEGMENT 0x10
#define DVBSUB_REGION_SEGMENT 0x11
#define DVBSUB_CLUT_SEGMENT 0x12
#define DVBSUB_OBJECT_SEGMENT 0x13
#define DVBSUB_DISPLAY_SEGMENT 0x80
|
0c3c674c |
#define cm (ff_cropTbl + MAX_NEG_CROP) |
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#ifdef DEBUG_SAVE_IMAGES
#undef fprintf
#if 0
static void png_save(const char *filename, uint8_t *bitmap, int w, int h,
uint32_t *rgba_palette)
{
int x, y, v;
FILE *f;
char fname[40], fname2[40];
char command[1024]; |
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|
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snprintf(fname, 40, "%s.ppm", filename);
f = fopen(fname, "w");
if (!f) {
perror(fname);
exit(1);
}
fprintf(f, "P6\n"
"%d %d\n"
"%d\n",
w, h, 255);
for(y = 0; y < h; y++) {
for(x = 0; x < w; x++) {
v = rgba_palette[bitmap[y * w + x]];
putc((v >> 16) & 0xff, f);
putc((v >> 8) & 0xff, f);
putc((v >> 0) & 0xff, f);
}
}
fclose(f); |
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|
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snprintf(fname2, 40, "%s-a.pgm", filename);
f = fopen(fname2, "w");
if (!f) {
perror(fname2);
exit(1);
}
fprintf(f, "P5\n"
"%d %d\n"
"%d\n",
w, h, 255);
for(y = 0; y < h; y++) {
for(x = 0; x < w; x++) {
v = rgba_palette[bitmap[y * w + x]];
putc((v >> 24) & 0xff, f);
}
}
fclose(f); |
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|
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snprintf(command, 1024, "pnmtopng -alpha %s %s > %s.png 2> /dev/null", fname2, fname, filename);
system(command); |
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|
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snprintf(command, 1024, "rm %s %s", fname, fname2);
system(command);
}
#endif
static void png_save2(const char *filename, uint32_t *bitmap, int w, int h)
{
int x, y, v;
FILE *f;
char fname[40], fname2[40];
char command[1024]; |
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|
e1c48b7a |
snprintf(fname, sizeof(fname), "%s.ppm", filename); |
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f = fopen(fname, "w");
if (!f) {
perror(fname);
exit(1);
}
fprintf(f, "P6\n"
"%d %d\n"
"%d\n",
w, h, 255);
for(y = 0; y < h; y++) {
for(x = 0; x < w; x++) {
v = bitmap[y * w + x];
putc((v >> 16) & 0xff, f);
putc((v >> 8) & 0xff, f);
putc((v >> 0) & 0xff, f);
}
}
fclose(f); |
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|
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snprintf(fname2, sizeof(fname2), "%s-a.pgm", filename); |
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f = fopen(fname2, "w");
if (!f) {
perror(fname2);
exit(1);
}
fprintf(f, "P5\n"
"%d %d\n"
"%d\n",
w, h, 255);
for(y = 0; y < h; y++) {
for(x = 0; x < w; x++) {
v = bitmap[y * w + x];
putc((v >> 24) & 0xff, f);
}
}
fclose(f); |
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|
e1c48b7a |
snprintf(command, sizeof(command), "pnmtopng -alpha %s %s > %s.png 2> /dev/null", fname2, fname, filename); |
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system(command); |
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|
e1c48b7a |
snprintf(command, sizeof(command), "rm %s %s", fname, fname2); |
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system(command);
}
#endif
#define RGBA(r,g,b,a) (((a) << 24) | ((r) << 16) | ((g) << 8) | (b))
typedef struct DVBSubCLUT {
int id;
uint32_t clut4[4];
uint32_t clut16[16];
uint32_t clut256[256]; |
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|
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struct DVBSubCLUT *next;
} DVBSubCLUT;
static DVBSubCLUT default_clut;
typedef struct DVBSubObjectDisplay {
int object_id;
int region_id;
int x_pos;
int y_pos;
|
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int fgcolor;
int bgcolor; |
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|
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struct DVBSubObjectDisplay *region_list_next; |
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struct DVBSubObjectDisplay *object_list_next; |
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} DVBSubObjectDisplay;
typedef struct DVBSubObject {
int id;
int type; |
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DVBSubObjectDisplay *display_list;
|
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struct DVBSubObject *next;
} DVBSubObject;
typedef struct DVBSubRegionDisplay {
int region_id;
int x_pos;
int y_pos;
struct DVBSubRegionDisplay *next;
} DVBSubRegionDisplay;
typedef struct DVBSubRegion {
int id;
int width;
int height;
int depth; |
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|
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int clut; |
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int bgcolor; |
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|
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uint8_t *pbuf;
int buf_size;
DVBSubObjectDisplay *display_list; |
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|
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struct DVBSubRegion *next;
} DVBSubRegion;
typedef struct DVBSubContext {
int composition_id;
int ancillary_id;
int time_out;
DVBSubRegion *region_list;
DVBSubCLUT *clut_list;
DVBSubObject *object_list; |
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|
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int display_list_size;
DVBSubRegionDisplay *display_list;
} DVBSubContext;
static DVBSubObject* get_object(DVBSubContext *ctx, int object_id)
{
DVBSubObject *ptr = ctx->object_list;
|
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while (ptr && ptr->id != object_id) { |
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ptr = ptr->next;
} |
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|
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return ptr;
}
static DVBSubCLUT* get_clut(DVBSubContext *ctx, int clut_id)
{
DVBSubCLUT *ptr = ctx->clut_list;
|
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while (ptr && ptr->id != clut_id) { |
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ptr = ptr->next;
} |
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|
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return ptr;
}
static DVBSubRegion* get_region(DVBSubContext *ctx, int region_id)
{
DVBSubRegion *ptr = ctx->region_list;
|
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while (ptr && ptr->id != region_id) { |
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ptr = ptr->next;
} |
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|
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return ptr;
}
static void delete_region_display_list(DVBSubContext *ctx, DVBSubRegion *region)
{
DVBSubObject *object, *obj2, **obj2_ptr;
DVBSubObjectDisplay *display, *obj_disp, **obj_disp_ptr;
|
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while (region->display_list) { |
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display = region->display_list; |
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|
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object = get_object(ctx, display->object_id); |
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|
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if (object) { |
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obj_disp_ptr = &object->display_list; |
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obj_disp = *obj_disp_ptr; |
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|
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while (obj_disp && obj_disp != display) { |
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obj_disp_ptr = &obj_disp->object_list_next; |
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obj_disp = *obj_disp_ptr; |
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} |
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|
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if (obj_disp) {
*obj_disp_ptr = obj_disp->object_list_next; |
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|
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if (!object->display_list) { |
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obj2_ptr = &ctx->object_list; |
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obj2 = *obj2_ptr; |
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|
8403c543 |
while (obj2 != object) {
assert(obj2); |
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obj2_ptr = &obj2->next; |
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obj2 = *obj2_ptr; |
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} |
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|
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*obj2_ptr = obj2->next; |
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|
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av_free(obj2);
}
}
} |
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|
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region->display_list = display->region_list_next; |
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|
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av_free(display);
} |
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|
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}
static void delete_state(DVBSubContext *ctx)
{
DVBSubRegion *region;
DVBSubCLUT *clut; |
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|
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while (ctx->region_list) { |
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region = ctx->region_list;
ctx->region_list = region->next;
delete_region_display_list(ctx, region); |
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if (region->pbuf) |
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av_free(region->pbuf);
av_free(region);
}
|
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while (ctx->clut_list) { |
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clut = ctx->clut_list;
ctx->clut_list = clut->next;
av_free(clut);
}
/* Should already be null */ |
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if (ctx->object_list) |
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av_log(0, AV_LOG_ERROR, "Memory deallocation error!\n");
}
|
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static av_cold int dvbsub_init_decoder(AVCodecContext *avctx) |
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{
int i, r, g, b, a = 0;
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
memset(avctx->priv_data, 0, sizeof(DVBSubContext)); |
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|
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ctx->composition_id = avctx->sub_id & 0xffff;
ctx->ancillary_id = avctx->sub_id >> 16;
default_clut.id = -1;
default_clut.next = NULL;
default_clut.clut4[0] = RGBA( 0, 0, 0, 0);
default_clut.clut4[1] = RGBA(255, 255, 255, 255);
default_clut.clut4[2] = RGBA( 0, 0, 0, 255);
default_clut.clut4[3] = RGBA(127, 127, 127, 255);
default_clut.clut16[0] = RGBA( 0, 0, 0, 0);
for (i = 1; i < 16; i++) {
if (i < 8) {
r = (i & 1) ? 255 : 0;
g = (i & 2) ? 255 : 0;
b = (i & 4) ? 255 : 0;
} else {
r = (i & 1) ? 127 : 0;
g = (i & 2) ? 127 : 0;
b = (i & 4) ? 127 : 0; |
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} |
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default_clut.clut16[i] = RGBA(r, g, b, 255);
}
default_clut.clut256[0] = RGBA( 0, 0, 0, 0);
for (i = 1; i < 256; i++) {
if (i < 8) {
r = (i & 1) ? 255 : 0;
g = (i & 2) ? 255 : 0;
b = (i & 4) ? 255 : 0;
a = 63;
} else {
switch (i & 0x88) {
case 0x00:
r = ((i & 1) ? 85 : 0) + ((i & 0x10) ? 170 : 0);
g = ((i & 2) ? 85 : 0) + ((i & 0x20) ? 170 : 0);
b = ((i & 4) ? 85 : 0) + ((i & 0x40) ? 170 : 0);
a = 255;
break;
case 0x08:
r = ((i & 1) ? 85 : 0) + ((i & 0x10) ? 170 : 0);
g = ((i & 2) ? 85 : 0) + ((i & 0x20) ? 170 : 0);
b = ((i & 4) ? 85 : 0) + ((i & 0x40) ? 170 : 0);
a = 127;
break;
case 0x80:
r = 127 + ((i & 1) ? 43 : 0) + ((i & 0x10) ? 85 : 0);
g = 127 + ((i & 2) ? 43 : 0) + ((i & 0x20) ? 85 : 0);
b = 127 + ((i & 4) ? 43 : 0) + ((i & 0x40) ? 85 : 0);
a = 255;
break;
case 0x88:
r = ((i & 1) ? 43 : 0) + ((i & 0x10) ? 85 : 0);
g = ((i & 2) ? 43 : 0) + ((i & 0x20) ? 85 : 0);
b = ((i & 4) ? 43 : 0) + ((i & 0x40) ? 85 : 0);
a = 255;
break;
} |
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} |
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default_clut.clut256[i] = RGBA(r, g, b, a);
}
return 0;
}
|
98a6fff9 |
static av_cold int dvbsub_close_decoder(AVCodecContext *avctx) |
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{
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
DVBSubRegionDisplay *display;
delete_state(ctx); |
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|
5b2052b3 |
while (ctx->display_list) { |
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display = ctx->display_list;
ctx->display_list = display->next; |
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|
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av_free(display);
}
return 0;
}
|
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static int dvbsub_read_2bit_string(uint8_t *destbuf, int dbuf_len, |
7993df65 |
const uint8_t **srcbuf, int buf_size, |
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int non_mod, uint8_t *map_table)
{
GetBitContext gb; |
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|
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int bits;
int run_length;
int pixels_read = 0; |
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|
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init_get_bits(&gb, *srcbuf, buf_size << 8); |
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|
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while (get_bits_count(&gb) < (buf_size << 8) && pixels_read < dbuf_len) {
bits = get_bits(&gb, 2);
|
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if (bits) { |
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if (non_mod != 1 || bits != 1) { |
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if (map_table) |
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*destbuf++ = map_table[bits];
else
*destbuf++ = bits;
}
pixels_read++;
} else { |
5fc32c27 |
bits = get_bits1(&gb); |
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if (bits == 1) {
run_length = get_bits(&gb, 3) + 3;
bits = get_bits(&gb, 2); |
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|
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if (non_mod == 1 && bits == 1)
pixels_read += run_length;
else { |
0dd954b1 |
if (map_table) |
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bits = map_table[bits];
while (run_length-- > 0 && pixels_read < dbuf_len) {
*destbuf++ = bits;
pixels_read++;
}
}
} else { |
5fc32c27 |
bits = get_bits1(&gb); |
c6ec28b1 |
if (bits == 0) {
bits = get_bits(&gb, 2);
if (bits == 2) {
run_length = get_bits(&gb, 4) + 12;
bits = get_bits(&gb, 2);
if (non_mod == 1 && bits == 1)
pixels_read += run_length;
else { |
0dd954b1 |
if (map_table) |
c6ec28b1 |
bits = map_table[bits];
while (run_length-- > 0 && pixels_read < dbuf_len) {
*destbuf++ = bits;
pixels_read++;
}
}
} else if (bits == 3) {
run_length = get_bits(&gb, 8) + 29;
bits = get_bits(&gb, 2);
if (non_mod == 1 && bits == 1)
pixels_read += run_length;
else { |
0dd954b1 |
if (map_table) |
c6ec28b1 |
bits = map_table[bits];
while (run_length-- > 0 && pixels_read < dbuf_len) {
*destbuf++ = bits;
pixels_read++;
}
}
} else if (bits == 1) {
pixels_read += 2; |
0dd954b1 |
if (map_table) |
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bits = map_table[0];
else
bits = 0;
if (pixels_read <= dbuf_len) {
*destbuf++ = bits;
*destbuf++ = bits;
}
} else {
(*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
return pixels_read;
}
} else { |
0dd954b1 |
if (map_table) |
c6ec28b1 |
bits = map_table[0];
else
bits = 0;
*destbuf++ = bits;
pixels_read++;
}
}
}
} |
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|
0dd954b1 |
if (get_bits(&gb, 6)) |
c6ec28b1 |
av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n");
(*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
return pixels_read;
} |
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static int dvbsub_read_4bit_string(uint8_t *destbuf, int dbuf_len, |
7993df65 |
const uint8_t **srcbuf, int buf_size, |
c6ec28b1 |
int non_mod, uint8_t *map_table)
{
GetBitContext gb; |
115329f1 |
|
c6ec28b1 |
int bits;
int run_length;
int pixels_read = 0; |
115329f1 |
init_get_bits(&gb, *srcbuf, buf_size << 8);
|
c6ec28b1 |
while (get_bits_count(&gb) < (buf_size << 8) && pixels_read < dbuf_len) {
bits = get_bits(&gb, 4);
|
0dd954b1 |
if (bits) { |
c6ec28b1 |
if (non_mod != 1 || bits != 1) { |
0dd954b1 |
if (map_table) |
c6ec28b1 |
*destbuf++ = map_table[bits];
else
*destbuf++ = bits;
}
pixels_read++;
} else { |
5fc32c27 |
bits = get_bits1(&gb); |
c6ec28b1 |
if (bits == 0) {
run_length = get_bits(&gb, 3); |
115329f1 |
|
c6ec28b1 |
if (run_length == 0) {
(*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
return pixels_read;
} |
115329f1 |
|
c6ec28b1 |
run_length += 2; |
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|
0dd954b1 |
if (map_table) |
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bits = map_table[0];
else
bits = 0; |
115329f1 |
|
c6ec28b1 |
while (run_length-- > 0 && pixels_read < dbuf_len) {
*destbuf++ = bits;
pixels_read++;
}
} else { |
5fc32c27 |
bits = get_bits1(&gb); |
c6ec28b1 |
if (bits == 0) {
run_length = get_bits(&gb, 2) + 4;
bits = get_bits(&gb, 4);
if (non_mod == 1 && bits == 1)
pixels_read += run_length;
else { |
0dd954b1 |
if (map_table) |
c6ec28b1 |
bits = map_table[bits];
while (run_length-- > 0 && pixels_read < dbuf_len) {
*destbuf++ = bits;
pixels_read++;
}
}
} else {
bits = get_bits(&gb, 2);
if (bits == 2) {
run_length = get_bits(&gb, 4) + 9;
bits = get_bits(&gb, 4); |
115329f1 |
|
c6ec28b1 |
if (non_mod == 1 && bits == 1)
pixels_read += run_length;
else { |
0dd954b1 |
if (map_table) |
c6ec28b1 |
bits = map_table[bits];
while (run_length-- > 0 && pixels_read < dbuf_len) {
*destbuf++ = bits;
pixels_read++;
}
}
} else if (bits == 3) {
run_length = get_bits(&gb, 8) + 25;
bits = get_bits(&gb, 4);
if (non_mod == 1 && bits == 1)
pixels_read += run_length;
else { |
0dd954b1 |
if (map_table) |
c6ec28b1 |
bits = map_table[bits];
while (run_length-- > 0 && pixels_read < dbuf_len) {
*destbuf++ = bits;
pixels_read++;
}
}
} else if (bits == 1) {
pixels_read += 2; |
0dd954b1 |
if (map_table) |
c6ec28b1 |
bits = map_table[0];
else
bits = 0;
if (pixels_read <= dbuf_len) {
*destbuf++ = bits;
*destbuf++ = bits;
}
} else { |
0dd954b1 |
if (map_table) |
c6ec28b1 |
bits = map_table[0];
else
bits = 0;
*destbuf++ = bits;
pixels_read ++;
}
}
}
}
} |
115329f1 |
|
0dd954b1 |
if (get_bits(&gb, 8)) |
c6ec28b1 |
av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n"); |
115329f1 |
|
c6ec28b1 |
(*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
return pixels_read;
} |
115329f1 |
static int dvbsub_read_8bit_string(uint8_t *destbuf, int dbuf_len, |
7993df65 |
const uint8_t **srcbuf, int buf_size, |
c6ec28b1 |
int non_mod, uint8_t *map_table)
{ |
7993df65 |
const uint8_t *sbuf_end = (*srcbuf) + buf_size; |
c6ec28b1 |
int bits;
int run_length;
int pixels_read = 0; |
115329f1 |
|
c6ec28b1 |
while (*srcbuf < sbuf_end && pixels_read < dbuf_len) {
bits = *(*srcbuf)++; |
115329f1 |
|
0dd954b1 |
if (bits) { |
c6ec28b1 |
if (non_mod != 1 || bits != 1) { |
0dd954b1 |
if (map_table) |
c6ec28b1 |
*destbuf++ = map_table[bits];
else
*destbuf++ = bits;
}
pixels_read++;
} else {
bits = *(*srcbuf)++;
run_length = bits & 0x7f;
if ((bits & 0x80) == 0) {
if (run_length == 0) {
return pixels_read;
} |
115329f1 |
|
0dd954b1 |
if (map_table) |
c6ec28b1 |
bits = map_table[0];
else
bits = 0;
while (run_length-- > 0 && pixels_read < dbuf_len) {
*destbuf++ = bits;
pixels_read++;
}
} else {
bits = *(*srcbuf)++;
if (non_mod == 1 && bits == 1)
pixels_read += run_length; |
0dd954b1 |
if (map_table) |
c6ec28b1 |
bits = map_table[bits];
else while (run_length-- > 0 && pixels_read < dbuf_len) {
*destbuf++ = bits;
pixels_read++;
}
}
}
} |
115329f1 |
|
0dd954b1 |
if (*(*srcbuf)++) |
c6ec28b1 |
av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n"); |
115329f1 |
|
c6ec28b1 |
return pixels_read;
} |
115329f1 |
|
c6ec28b1 |
static void dvbsub_parse_pixel_data_block(AVCodecContext *avctx, DVBSubObjectDisplay *display, |
7993df65 |
const uint8_t *buf, int buf_size, int top_bottom, int non_mod) |
c6ec28b1 |
{
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
DVBSubRegion *region = get_region(ctx, display->region_id); |
7993df65 |
const uint8_t *buf_end = buf + buf_size; |
c6ec28b1 |
uint8_t *pbuf;
int x_pos, y_pos;
int i; |
115329f1 |
|
c6ec28b1 |
uint8_t map2to4[] = { 0x0, 0x7, 0x8, 0xf};
uint8_t map2to8[] = {0x00, 0x77, 0x88, 0xff}; |
115329f1 |
uint8_t map4to8[] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, |
c6ec28b1 |
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff};
uint8_t *map_table; |
115329f1 |
|
c6ec28b1 |
#ifdef DEBUG
av_log(avctx, AV_LOG_INFO, "DVB pixel block size %d, %s field:\n", buf_size,
top_bottom ? "bottom" : "top");
#endif
#ifdef DEBUG_PACKET_CONTENTS |
5b2052b3 |
for (i = 0; i < buf_size; i++) { |
c6ec28b1 |
if (i % 16 == 0)
av_log(avctx, AV_LOG_INFO, "0x%08p: ", buf+i);
av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
if (i % 16 == 15)
av_log(avctx, AV_LOG_INFO, "\n");
} |
115329f1 |
|
0dd954b1 |
if (i % 16) |
c6ec28b1 |
av_log(avctx, AV_LOG_INFO, "\n");
#endif
if (region == 0)
return; |
115329f1 |
|
c6ec28b1 |
pbuf = region->pbuf; |
115329f1 |
|
c6ec28b1 |
x_pos = display->x_pos;
y_pos = display->y_pos; |
115329f1 |
|
c6ec28b1 |
if ((y_pos & 1) != top_bottom)
y_pos++;
while (buf < buf_end) {
if (x_pos > region->width || y_pos > region->height) {
av_log(avctx, AV_LOG_ERROR, "Invalid object location!\n");
return;
} |
115329f1 |
|
c6ec28b1 |
switch (*buf++) {
case 0x10:
if (region->depth == 8)
map_table = map2to8;
else if (region->depth == 4)
map_table = map2to4;
else
map_table = NULL; |
115329f1 |
x_pos += dvbsub_read_2bit_string(pbuf + (y_pos * region->width) + x_pos,
region->width - x_pos, &buf, buf_size, |
c6ec28b1 |
non_mod, map_table);
break;
case 0x11:
if (region->depth < 4) {
av_log(avctx, AV_LOG_ERROR, "4-bit pixel string in %d-bit region!\n", region->depth);
return;
} |
115329f1 |
|
c6ec28b1 |
if (region->depth == 8)
map_table = map4to8;
else
map_table = NULL; |
115329f1 |
x_pos += dvbsub_read_4bit_string(pbuf + (y_pos * region->width) + x_pos,
region->width - x_pos, &buf, buf_size, |
c6ec28b1 |
non_mod, map_table);
break;
case 0x12:
if (region->depth < 8) {
av_log(avctx, AV_LOG_ERROR, "8-bit pixel string in %d-bit region!\n", region->depth);
return;
} |
115329f1 |
x_pos += dvbsub_read_8bit_string(pbuf + (y_pos * region->width) + x_pos,
region->width - x_pos, &buf, buf_size, |
c6ec28b1 |
non_mod, NULL);
break; |
115329f1 |
|
c6ec28b1 |
case 0x20:
map2to4[0] = (*buf) >> 4;
map2to4[1] = (*buf++) & 0xf;
map2to4[2] = (*buf) >> 4;
map2to4[3] = (*buf++) & 0xf;
break;
case 0x21:
for (i = 0; i < 4; i++)
map2to8[i] = *buf++;
break;
case 0x22:
for (i = 0; i < 16; i++)
map4to8[i] = *buf++;
break; |
115329f1 |
|
c6ec28b1 |
case 0xf0:
x_pos = display->x_pos;
y_pos += 2;
break;
default:
av_log(avctx, AV_LOG_INFO, "Unknown/unsupported pixel block 0x%x\n", *(buf-1));
}
} |
115329f1 |
|
c6ec28b1 |
}
static void dvbsub_parse_object_segment(AVCodecContext *avctx, |
7993df65 |
const uint8_t *buf, int buf_size) |
c6ec28b1 |
{
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data; |
115329f1 |
|
7993df65 |
const uint8_t *buf_end = buf + buf_size;
const uint8_t *block; |
c6ec28b1 |
int object_id;
DVBSubObject *object;
DVBSubObjectDisplay *display;
int top_field_len, bottom_field_len; |
115329f1 |
|
cedb83a6 |
int coding_method, non_modifying_color; |
115329f1 |
|
fead30d4 |
object_id = AV_RB16(buf); |
c6ec28b1 |
buf += 2; |
115329f1 |
|
c6ec28b1 |
object = get_object(ctx, object_id);
|
115329f1 |
if (!object)
return;
|
c6ec28b1 |
coding_method = ((*buf) >> 2) & 3; |
cedb83a6 |
non_modifying_color = ((*buf++) >> 1) & 1; |
115329f1 |
|
c6ec28b1 |
if (coding_method == 0) { |
fead30d4 |
top_field_len = AV_RB16(buf); |
c6ec28b1 |
buf += 2; |
fead30d4 |
bottom_field_len = AV_RB16(buf); |
c6ec28b1 |
buf += 2; |
115329f1 |
|
c6ec28b1 |
if (buf + top_field_len + bottom_field_len > buf_end) {
av_log(avctx, AV_LOG_ERROR, "Field data size too large\n");
return; |
115329f1 |
}
|
0dd954b1 |
for (display = object->display_list; display; display = display->object_list_next) { |
c6ec28b1 |
block = buf;
dvbsub_parse_pixel_data_block(avctx, display, block, top_field_len, 0, |
cedb83a6 |
non_modifying_color); |
c6ec28b1 |
if (bottom_field_len > 0)
block = buf + top_field_len;
else
bottom_field_len = top_field_len;
dvbsub_parse_pixel_data_block(avctx, display, block, bottom_field_len, 1, |
cedb83a6 |
non_modifying_color); |
c6ec28b1 |
} |
115329f1 |
|
c6ec28b1 |
/* } else if (coding_method == 1) {*/ |
115329f1 |
|
c6ec28b1 |
} else {
av_log(avctx, AV_LOG_ERROR, "Unknown object coding %d\n", coding_method);
} |
115329f1 |
|
c6ec28b1 |
}
static void dvbsub_parse_clut_segment(AVCodecContext *avctx, |
7993df65 |
const uint8_t *buf, int buf_size) |
c6ec28b1 |
{
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data; |
115329f1 |
|
7993df65 |
const uint8_t *buf_end = buf + buf_size; |
c6ec28b1 |
int clut_id;
DVBSubCLUT *clut;
int entry_id, depth , full_range;
int y, cr, cb, alpha;
int r, g, b, r_add, g_add, b_add;
#ifdef DEBUG_PACKET_CONTENTS
int i;
av_log(avctx, AV_LOG_INFO, "DVB clut packet:\n");
|
5b2052b3 |
for (i=0; i < buf_size; i++) { |
c6ec28b1 |
av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
if (i % 16 == 15)
av_log(avctx, AV_LOG_INFO, "\n");
} |
115329f1 |
|
0dd954b1 |
if (i % 16) |
c6ec28b1 |
av_log(avctx, AV_LOG_INFO, "\n");
#endif
clut_id = *buf++;
buf += 1; |
115329f1 |
|
c6ec28b1 |
clut = get_clut(ctx, clut_id); |
115329f1 |
|
e59d9328 |
if (!clut) { |
c6ec28b1 |
clut = av_malloc(sizeof(DVBSubCLUT)); |
115329f1 |
|
c6ec28b1 |
memcpy(clut, &default_clut, sizeof(DVBSubCLUT));
clut->id = clut_id; |
115329f1 |
clut->next = ctx->clut_list; |
c6ec28b1 |
ctx->clut_list = clut;
} |
115329f1 |
|
5b2052b3 |
while (buf + 4 < buf_end) { |
c6ec28b1 |
entry_id = *buf++; |
115329f1 |
|
c6ec28b1 |
depth = (*buf) & 0xe0; |
115329f1 |
|
c6ec28b1 |
if (depth == 0) {
av_log(avctx, AV_LOG_ERROR, "Invalid clut depth 0x%x!\n", *buf);
return;
} |
115329f1 |
|
c6ec28b1 |
full_range = (*buf++) & 1; |
115329f1 |
|
c6ec28b1 |
if (full_range) {
y = *buf++;
cr = *buf++;
cb = *buf++;
alpha = *buf++;
} else {
y = buf[0] & 0xfc;
cr = (((buf[0] & 3) << 2) | ((buf[1] >> 6) & 3)) << 4;
cb = (buf[1] << 2) & 0xf0;
alpha = (buf[1] << 6) & 0xc0; |
115329f1 |
|
c6ec28b1 |
buf += 2;
} |
115329f1 |
|
c6ec28b1 |
if (y == 0)
alpha = 0xff; |
115329f1 |
|
c6ec28b1 |
YUV_TO_RGB1_CCIR(cb, cr);
YUV_TO_RGB2_CCIR(r, g, b, y); |
115329f1 |
|
c6ec28b1 |
#ifdef DEBUG
av_log(avctx, AV_LOG_INFO, "clut %d := (%d,%d,%d,%d)\n", entry_id, r, g, b, alpha);
#endif |
115329f1 |
|
c6ec28b1 |
if (depth & 0x80)
clut->clut4[entry_id] = RGBA(r,g,b,255 - alpha);
if (depth & 0x40)
clut->clut16[entry_id] = RGBA(r,g,b,255 - alpha);
if (depth & 0x20)
clut->clut256[entry_id] = RGBA(r,g,b,255 - alpha);
}
}
static void dvbsub_parse_region_segment(AVCodecContext *avctx, |
7993df65 |
const uint8_t *buf, int buf_size) |
c6ec28b1 |
{
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data; |
115329f1 |
|
7993df65 |
const uint8_t *buf_end = buf + buf_size; |
c6ec28b1 |
int region_id, object_id;
DVBSubRegion *region;
DVBSubObject *object;
DVBSubObjectDisplay *display;
int fill; |
115329f1 |
|
c6ec28b1 |
if (buf_size < 10)
return; |
115329f1 |
|
c6ec28b1 |
region_id = *buf++; |
115329f1 |
|
c6ec28b1 |
region = get_region(ctx, region_id); |
115329f1 |
|
e59d9328 |
if (!region) { |
c6ec28b1 |
region = av_mallocz(sizeof(DVBSubRegion)); |
115329f1 |
|
c6ec28b1 |
region->id = region_id; |
115329f1 |
|
c6ec28b1 |
region->next = ctx->region_list;
ctx->region_list = region;
} |
115329f1 |
|
c6ec28b1 |
fill = ((*buf++) >> 3) & 1; |
115329f1 |
|
fead30d4 |
region->width = AV_RB16(buf); |
c6ec28b1 |
buf += 2; |
fead30d4 |
region->height = AV_RB16(buf); |
c6ec28b1 |
buf += 2; |
115329f1 |
|
c6ec28b1 |
if (region->width * region->height != region->buf_size) { |
0dd954b1 |
if (region->pbuf) |
c6ec28b1 |
av_free(region->pbuf); |
115329f1 |
|
c6ec28b1 |
region->buf_size = region->width * region->height; |
115329f1 |
|
c6ec28b1 |
region->pbuf = av_malloc(region->buf_size); |
115329f1 |
|
c6ec28b1 |
fill = 1;
} |
115329f1 |
|
c6ec28b1 |
region->depth = 1 << (((*buf++) >> 2) & 7); |
2867ed9b |
if(region->depth<2 || region->depth>8){
av_log(avctx, AV_LOG_ERROR, "region depth %d is invalid\n", region->depth);
region->depth= 4;
} |
c6ec28b1 |
region->clut = *buf++; |
115329f1 |
|
c6ec28b1 |
if (region->depth == 8) |
cedb83a6 |
region->bgcolor = *buf++; |
c6ec28b1 |
else {
buf += 1; |
115329f1 |
|
c6ec28b1 |
if (region->depth == 4) |
cedb83a6 |
region->bgcolor = (((*buf++) >> 4) & 15); |
c6ec28b1 |
else |
cedb83a6 |
region->bgcolor = (((*buf++) >> 2) & 3); |
c6ec28b1 |
}
#ifdef DEBUG
av_log(avctx, AV_LOG_INFO, "Region %d, (%dx%d)\n", region_id, region->width, region->height);
#endif
if (fill) { |
cedb83a6 |
memset(region->pbuf, region->bgcolor, region->buf_size); |
c6ec28b1 |
#ifdef DEBUG |
cedb83a6 |
av_log(avctx, AV_LOG_INFO, "Fill region (%d)\n", region->bgcolor); |
c6ec28b1 |
#endif
}
delete_region_display_list(ctx, region);
while (buf + 5 < buf_end) { |
fead30d4 |
object_id = AV_RB16(buf); |
c6ec28b1 |
buf += 2; |
115329f1 |
|
c6ec28b1 |
object = get_object(ctx, object_id);
|
e59d9328 |
if (!object) { |
c6ec28b1 |
object = av_mallocz(sizeof(DVBSubObject)); |
115329f1 |
|
c6ec28b1 |
object->id = object_id;
object->next = ctx->object_list;
ctx->object_list = object;
} |
115329f1 |
|
c6ec28b1 |
object->type = (*buf) >> 6; |
115329f1 |
|
c6ec28b1 |
display = av_mallocz(sizeof(DVBSubObjectDisplay)); |
115329f1 |
|
c6ec28b1 |
display->object_id = object_id;
display->region_id = region_id; |
115329f1 |
|
fead30d4 |
display->x_pos = AV_RB16(buf) & 0xfff; |
c6ec28b1 |
buf += 2; |
fead30d4 |
display->y_pos = AV_RB16(buf) & 0xfff; |
c6ec28b1 |
buf += 2; |
115329f1 |
|
c6ec28b1 |
if ((object->type == 1 || object->type == 2) && buf+1 < buf_end) { |
cedb83a6 |
display->fgcolor = *buf++;
display->bgcolor = *buf++; |
c6ec28b1 |
} |
115329f1 |
|
c6ec28b1 |
display->region_list_next = region->display_list;
region->display_list = display; |
115329f1 |
|
c6ec28b1 |
display->object_list_next = object->display_list;
object->display_list = display;
}
}
static void dvbsub_parse_page_segment(AVCodecContext *avctx, |
7993df65 |
const uint8_t *buf, int buf_size) |
c6ec28b1 |
{
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
DVBSubRegionDisplay *display;
DVBSubRegionDisplay *tmp_display_list, **tmp_ptr; |
115329f1 |
|
7993df65 |
const uint8_t *buf_end = buf + buf_size; |
c6ec28b1 |
int region_id;
int page_state; |
115329f1 |
|
c6ec28b1 |
if (buf_size < 1)
return; |
115329f1 |
|
c6ec28b1 |
ctx->time_out = *buf++;
page_state = ((*buf++) >> 2) & 3; |
115329f1 |
|
c6ec28b1 |
#ifdef DEBUG
av_log(avctx, AV_LOG_INFO, "Page time out %ds, state %d\n", ctx->time_out, page_state);
#endif
|
5b2052b3 |
if (page_state == 2) { |
c6ec28b1 |
delete_state(ctx);
} |
115329f1 |
|
c6ec28b1 |
tmp_display_list = ctx->display_list;
ctx->display_list = NULL;
ctx->display_list_size = 0; |
115329f1 |
|
c6ec28b1 |
while (buf + 5 < buf_end) {
region_id = *buf++;
buf += 1; |
115329f1 |
|
c6ec28b1 |
display = tmp_display_list;
tmp_ptr = &tmp_display_list; |
115329f1 |
|
0dd954b1 |
while (display && display->region_id != region_id) { |
c6ec28b1 |
tmp_ptr = &display->next;
display = display->next;
} |
115329f1 |
|
e59d9328 |
if (!display) |
c6ec28b1 |
display = av_mallocz(sizeof(DVBSubRegionDisplay)); |
115329f1 |
|
c6ec28b1 |
display->region_id = region_id; |
115329f1 |
|
fead30d4 |
display->x_pos = AV_RB16(buf); |
c6ec28b1 |
buf += 2; |
fead30d4 |
display->y_pos = AV_RB16(buf); |
c6ec28b1 |
buf += 2; |
115329f1 |
|
c6ec28b1 |
*tmp_ptr = display->next; |
115329f1 |
|
c6ec28b1 |
display->next = ctx->display_list;
ctx->display_list = display;
ctx->display_list_size++; |
115329f1 |
|
c6ec28b1 |
#ifdef DEBUG
av_log(avctx, AV_LOG_INFO, "Region %d, (%d,%d)\n", region_id, display->x_pos, display->y_pos);
#endif
} |
115329f1 |
|
0dd954b1 |
while (tmp_display_list) { |
c6ec28b1 |
display = tmp_display_list; |
115329f1 |
|
c6ec28b1 |
tmp_display_list = display->next; |
115329f1 |
|
c6ec28b1 |
av_free(display);
} |
115329f1 |
|
c6ec28b1 |
}
#ifdef DEBUG_SAVE_IMAGES
static void save_display_set(DVBSubContext *ctx)
{
DVBSubRegion *region;
DVBSubRegionDisplay *display;
DVBSubCLUT *clut;
uint32_t *clut_table;
int x_pos, y_pos, width, height;
int x, y, y_off, x_off;
uint32_t *pbuf;
char filename[32];
static int fileno_index = 0;
x_pos = -1;
y_pos = -1;
width = 0;
height = 0; |
115329f1 |
|
0dd954b1 |
for (display = ctx->display_list; display; display = display->next) { |
c6ec28b1 |
region = get_region(ctx, display->region_id); |
115329f1 |
|
c6ec28b1 |
if (x_pos == -1) {
x_pos = display->x_pos;
y_pos = display->y_pos;
width = region->width;
height = region->height;
} else {
if (display->x_pos < x_pos) {
width += (x_pos - display->x_pos);
x_pos = display->x_pos;
} |
115329f1 |
|
c6ec28b1 |
if (display->y_pos < y_pos) {
height += (y_pos - display->y_pos);
y_pos = display->y_pos;
} |
115329f1 |
|
c6ec28b1 |
if (display->x_pos + region->width > x_pos + width) {
width = display->x_pos + region->width - x_pos;
} |
115329f1 |
|
c6ec28b1 |
if (display->y_pos + region->height > y_pos + height) {
height = display->y_pos + region->height - y_pos;
}
}
} |
115329f1 |
|
c6ec28b1 |
if (x_pos >= 0) { |
115329f1 |
|
c6ec28b1 |
pbuf = av_malloc(width * height * 4);
|
0dd954b1 |
for (display = ctx->display_list; display; display = display->next) { |
c6ec28b1 |
region = get_region(ctx, display->region_id);
x_off = display->x_pos - x_pos;
y_off = display->y_pos - y_pos;
clut = get_clut(ctx, region->clut);
if (clut == 0)
clut = &default_clut;
switch (region->depth) {
case 2:
clut_table = clut->clut4;
break;
case 8:
clut_table = clut->clut256;
break;
case 4:
default:
clut_table = clut->clut16;
break;
} |
115329f1 |
|
c6ec28b1 |
for (y = 0; y < region->height; y++) {
for (x = 0; x < region->width; x++) { |
115329f1 |
pbuf[((y + y_off) * width) + x_off + x] = |
c6ec28b1 |
clut_table[region->pbuf[y * region->width + x]];
}
}
|
115329f1 |
} |
c6ec28b1 |
|
e1c48b7a |
snprintf(filename, sizeof(filename), "dvbs.%d", fileno_index); |
c6ec28b1 |
png_save2(filename, pbuf, width, height);
av_free(pbuf);
} |
115329f1 |
|
c6ec28b1 |
fileno_index++;
}
#endif
|
7993df65 |
static int dvbsub_display_end_segment(AVCodecContext *avctx, const uint8_t *buf, |
c6ec28b1 |
int buf_size, AVSubtitle *sub)
{
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
DVBSubRegion *region;
DVBSubRegionDisplay *display;
AVSubtitleRect *rect;
DVBSubCLUT *clut;
uint32_t *clut_table;
int i; |
115329f1 |
|
c6ec28b1 |
sub->rects = NULL;
sub->start_display_time = 0;
sub->end_display_time = ctx->time_out * 1000;
sub->format = 0;
sub->num_rects = ctx->display_list_size; |
115329f1 |
|
db4fac64 |
if (sub->num_rects > 0){
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]));
} |
c6ec28b1 |
i = 0;
|
0dd954b1 |
for (display = ctx->display_list; display; display = display->next) { |
c6ec28b1 |
region = get_region(ctx, display->region_id); |
db4fac64 |
rect = sub->rects[i]; |
115329f1 |
|
e59d9328 |
if (!region) |
c6ec28b1 |
continue; |
115329f1 |
|
c6ec28b1 |
rect->x = display->x_pos;
rect->y = display->y_pos;
rect->w = region->width;
rect->h = region->height;
rect->nb_colors = 16; |
25b4c651 |
rect->pict.linesize[0] = region->width; |
c6ec28b1 |
clut = get_clut(ctx, region->clut); |
115329f1 |
|
e59d9328 |
if (!clut) |
c6ec28b1 |
clut = &default_clut; |
115329f1 |
|
c6ec28b1 |
switch (region->depth) {
case 2:
clut_table = clut->clut4;
break;
case 8:
clut_table = clut->clut256;
break;
case 4:
default:
clut_table = clut->clut16;
break;
} |
115329f1 |
|
25b4c651 |
rect->pict.data[1] = av_malloc((1 << region->depth) * sizeof(uint32_t));
memcpy(rect->pict.data[1], clut_table, (1 << region->depth) * sizeof(uint32_t)); |
115329f1 |
|
25b4c651 |
rect->pict.data[0] = av_malloc(region->buf_size);
memcpy(rect->pict.data[0], region->pbuf, region->buf_size); |
115329f1 |
|
c6ec28b1 |
i++;
} |
115329f1 |
|
c6ec28b1 |
sub->num_rects = i; |
115329f1 |
|
c6ec28b1 |
#ifdef DEBUG_SAVE_IMAGES
save_display_set(ctx);
#endif |
115329f1 |
|
c6ec28b1 |
return 1;
}
static int dvbsub_decode(AVCodecContext *avctx,
void *data, int *data_size, |
7993df65 |
const uint8_t *buf, int buf_size) |
c6ec28b1 |
{
DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
AVSubtitle *sub = (AVSubtitle*) data; |
7993df65 |
const uint8_t *p, *p_end; |
c6ec28b1 |
int segment_type;
int page_id;
int segment_length; |
115329f1 |
|
c6ec28b1 |
#ifdef DEBUG_PACKET_CONTENTS
int i;
av_log(avctx, AV_LOG_INFO, "DVB sub packet:\n");
|
5b2052b3 |
for (i=0; i < buf_size; i++) { |
c6ec28b1 |
av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
if (i % 16 == 15)
av_log(avctx, AV_LOG_INFO, "\n");
} |
115329f1 |
|
0dd954b1 |
if (i % 16) |
c6ec28b1 |
av_log(avctx, AV_LOG_INFO, "\n");
#endif
if (buf_size <= 2)
return -1; |
115329f1 |
|
c6ec28b1 |
p = buf;
p_end = buf + buf_size; |
115329f1 |
|
5b2052b3 |
while (p < p_end && *p == 0x0f) { |
c6ec28b1 |
p += 1;
segment_type = *p++; |
fead30d4 |
page_id = AV_RB16(p); |
c6ec28b1 |
p += 2; |
fead30d4 |
segment_length = AV_RB16(p); |
c6ec28b1 |
p += 2; |
115329f1 |
|
c6ec28b1 |
if (page_id == ctx->composition_id || page_id == ctx->ancillary_id) {
switch (segment_type) {
case DVBSUB_PAGE_SEGMENT:
dvbsub_parse_page_segment(avctx, p, segment_length);
break;
case DVBSUB_REGION_SEGMENT:
dvbsub_parse_region_segment(avctx, p, segment_length);
break;
case DVBSUB_CLUT_SEGMENT:
dvbsub_parse_clut_segment(avctx, p, segment_length);
break;
case DVBSUB_OBJECT_SEGMENT:
dvbsub_parse_object_segment(avctx, p, segment_length);
break;
case DVBSUB_DISPLAY_SEGMENT:
*data_size = dvbsub_display_end_segment(avctx, p, segment_length, sub);
break;
default:
#ifdef DEBUG |
115329f1 |
av_log(avctx, AV_LOG_INFO, "Subtitling segment type 0x%x, page id %d, length %d\n", |
c6ec28b1 |
segment_type, page_id, segment_length);
#endif
break;
}
}
p += segment_length;
} |
115329f1 |
|
5b2052b3 |
if (p != p_end) { |
c6ec28b1 |
#ifdef DEBUG
av_log(avctx, AV_LOG_INFO, "Junk at end of packet\n");
#endif
return -1;
}
|
bf01fb69 |
return buf_size; |
c6ec28b1 |
}
AVCodec dvbsub_decoder = {
"dvbsub",
CODEC_TYPE_SUBTITLE,
CODEC_ID_DVB_SUBTITLE,
sizeof(DVBSubContext),
dvbsub_init_decoder,
NULL,
dvbsub_close_decoder,
dvbsub_decode, |
fe4bf374 |
.long_name = NULL_IF_CONFIG_SMALL("DVB subtitles"), |
c6ec28b1 |
}; |