/*
* DVB subtitle decoding for ffmpeg
- * Copyright (c) 2005 Ian Caulfield.
+ * Copyright (c) 2005 Ian Caulfield
*
* This file is part of FFmpeg.
*
*/
#include "avcodec.h"
#include "dsputil.h"
-#include "bitstream.h"
-#include "colorspace.h"
+#include "get_bits.h"
+#include "bytestream.h"
+#include "libavutil/colorspace.h"
//#define DEBUG
//#define DEBUG_PACKET_CONTENTS
#define DVBSUB_REGION_SEGMENT 0x11
#define DVBSUB_CLUT_SEGMENT 0x12
#define DVBSUB_OBJECT_SEGMENT 0x13
+#define DVBSUB_DISPLAYDEFINITION_SEGMENT 0x14
#define DVBSUB_DISPLAY_SEGMENT 0x80
#define cm (ff_cropTbl + MAX_NEG_CROP)
struct DVBSubRegion *next;
} DVBSubRegion;
+typedef struct DVBSubDisplayDefinition {
+ int version;
+
+ int x;
+ int y;
+ int width;
+ int height;
+} DVBSubDisplayDefinition;
+
typedef struct DVBSubContext {
int composition_id;
int ancillary_id;
int display_list_size;
DVBSubRegionDisplay *display_list;
+ DVBSubDisplayDefinition *display_definition;
} DVBSubContext;
object = get_object(ctx, display->object_id);
if (object) {
- obj_disp = object->display_list;
obj_disp_ptr = &object->display_list;
+ obj_disp = *obj_disp_ptr;
while (obj_disp && obj_disp != display) {
obj_disp_ptr = &obj_disp->object_list_next;
- obj_disp = obj_disp->object_list_next;
+ obj_disp = *obj_disp_ptr;
}
if (obj_disp) {
*obj_disp_ptr = obj_disp->object_list_next;
if (!object->display_list) {
- obj2 = ctx->object_list;
obj2_ptr = &ctx->object_list;
+ obj2 = *obj2_ptr;
- while (obj2 && obj2 != object) {
+ while (obj2 != object) {
+ assert(obj2);
obj2_ptr = &obj2->next;
- obj2 = obj2->next;
+ obj2 = *obj2_ptr;
}
*obj2_ptr = obj2->next;
av_free(clut);
}
+ av_freep(&ctx->display_definition);
+
/* Should already be null */
if (ctx->object_list)
av_log(0, AV_LOG_ERROR, "Memory deallocation error!\n");
static av_cold int dvbsub_init_decoder(AVCodecContext *avctx)
{
int i, r, g, b, a = 0;
- DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
+ DVBSubContext *ctx = avctx->priv_data;
- memset(avctx->priv_data, 0, sizeof(DVBSubContext));
-
- ctx->composition_id = avctx->sub_id & 0xffff;
- ctx->ancillary_id = avctx->sub_id >> 16;
+ if (!avctx->extradata || avctx->extradata_size != 4) {
+ av_log(avctx, AV_LOG_WARNING, "Invalid extradata, subtitle streams may be combined!\n");
+ ctx->composition_id = -1;
+ ctx->ancillary_id = -1;
+ } else {
+ ctx->composition_id = AV_RB16(avctx->extradata);
+ ctx->ancillary_id = AV_RB16(avctx->extradata + 2);
+ }
default_clut.id = -1;
default_clut.next = NULL;
static av_cold int dvbsub_close_decoder(AVCodecContext *avctx)
{
- DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
+ DVBSubContext *ctx = avctx->priv_data;
DVBSubRegionDisplay *display;
delete_state(ctx);
int run_length;
int pixels_read = 0;
- init_get_bits(&gb, *srcbuf, buf_size << 8);
+ init_get_bits(&gb, *srcbuf, buf_size << 3);
- while (get_bits_count(&gb) < (buf_size << 8) && pixels_read < dbuf_len) {
+ while (get_bits_count(&gb) < buf_size << 3 && pixels_read < dbuf_len) {
bits = get_bits(&gb, 2);
if (bits) {
int run_length;
int pixels_read = 0;
- init_get_bits(&gb, *srcbuf, buf_size << 8);
+ init_get_bits(&gb, *srcbuf, buf_size << 3);
- while (get_bits_count(&gb) < (buf_size << 8) && pixels_read < dbuf_len) {
+ while (get_bits_count(&gb) < buf_size << 3 && pixels_read < dbuf_len) {
bits = get_bits(&gb, 4);
if (bits) {
static void dvbsub_parse_pixel_data_block(AVCodecContext *avctx, DVBSubObjectDisplay *display,
const uint8_t *buf, int buf_size, int top_bottom, int non_mod)
{
- DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
+ DVBSubContext *ctx = avctx->priv_data;
DVBSubRegion *region = get_region(ctx, display->region_id);
const uint8_t *buf_end = buf + buf_size;
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff};
uint8_t *map_table;
-#ifdef DEBUG
- av_log(avctx, AV_LOG_INFO, "DVB pixel block size %d, %s field:\n", buf_size,
- top_bottom ? "bottom" : "top");
-#endif
+ dprintf(avctx, "DVB pixel block size %d, %s field:\n", buf_size,
+ top_bottom ? "bottom" : "top");
#ifdef DEBUG_PACKET_CONTENTS
for (i = 0; i < buf_size; i++) {
static void dvbsub_parse_object_segment(AVCodecContext *avctx,
const uint8_t *buf, int buf_size)
{
- DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
+ DVBSubContext *ctx = avctx->priv_data;
const uint8_t *buf_end = buf + buf_size;
const uint8_t *block;
static void dvbsub_parse_clut_segment(AVCodecContext *avctx,
const uint8_t *buf, int buf_size)
{
- DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
+ DVBSubContext *ctx = avctx->priv_data;
const uint8_t *buf_end = buf + buf_size;
int clut_id;
YUV_TO_RGB1_CCIR(cb, cr);
YUV_TO_RGB2_CCIR(r, g, b, y);
-#ifdef DEBUG
- av_log(avctx, AV_LOG_INFO, "clut %d := (%d,%d,%d,%d)\n", entry_id, r, g, b, alpha);
-#endif
+ dprintf(avctx, "clut %d := (%d,%d,%d,%d)\n", entry_id, r, g, b, alpha);
if (depth & 0x80)
clut->clut4[entry_id] = RGBA(r,g,b,255 - alpha);
static void dvbsub_parse_region_segment(AVCodecContext *avctx,
const uint8_t *buf, int buf_size)
{
- DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
+ DVBSubContext *ctx = avctx->priv_data;
const uint8_t *buf_end = buf + buf_size;
int region_id, object_id;
region->bgcolor = (((*buf++) >> 2) & 3);
}
-#ifdef DEBUG
- av_log(avctx, AV_LOG_INFO, "Region %d, (%dx%d)\n", region_id, region->width, region->height);
-#endif
+ dprintf(avctx, "Region %d, (%dx%d)\n", region_id, region->width, region->height);
if (fill) {
memset(region->pbuf, region->bgcolor, region->buf_size);
-#ifdef DEBUG
- av_log(avctx, AV_LOG_INFO, "Fill region (%d)\n", region->bgcolor);
-#endif
+ dprintf(avctx, "Fill region (%d)\n", region->bgcolor);
}
delete_region_display_list(ctx, region);
static void dvbsub_parse_page_segment(AVCodecContext *avctx,
const uint8_t *buf, int buf_size)
{
- DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
+ DVBSubContext *ctx = avctx->priv_data;
DVBSubRegionDisplay *display;
DVBSubRegionDisplay *tmp_display_list, **tmp_ptr;
ctx->time_out = *buf++;
page_state = ((*buf++) >> 2) & 3;
-#ifdef DEBUG
- av_log(avctx, AV_LOG_INFO, "Page time out %ds, state %d\n", ctx->time_out, page_state);
-#endif
+ dprintf(avctx, "Page time out %ds, state %d\n", ctx->time_out, page_state);
if (page_state == 2) {
delete_state(ctx);
ctx->display_list = display;
ctx->display_list_size++;
-#ifdef DEBUG
- av_log(avctx, AV_LOG_INFO, "Region %d, (%d,%d)\n", region_id, display->x_pos, display->y_pos);
-#endif
+ dprintf(avctx, "Region %d, (%d,%d)\n", region_id, display->x_pos, display->y_pos);
}
while (tmp_display_list) {
}
#endif
+static void dvbsub_parse_display_definition_segment(AVCodecContext *avctx,
+ const uint8_t *buf,
+ int buf_size)
+{
+ DVBSubContext *ctx = avctx->priv_data;
+ DVBSubDisplayDefinition *display_def = ctx->display_definition;
+ int dds_version, info_byte;
+
+ if (buf_size < 5)
+ return;
+
+ info_byte = bytestream_get_byte(&buf);
+ dds_version = info_byte >> 4;
+ if (display_def && display_def->version == dds_version)
+ return; // already have this display definition version
+
+ if (!display_def) {
+ display_def = av_mallocz(sizeof(*display_def));
+ ctx->display_definition = display_def;
+ }
+ if (!display_def)
+ return;
+
+ display_def->version = dds_version;
+ display_def->x = 0;
+ display_def->y = 0;
+ display_def->width = bytestream_get_be16(&buf) + 1;
+ display_def->height = bytestream_get_be16(&buf) + 1;
+
+ if (buf_size < 13)
+ return;
+
+ if (info_byte & 1<<3) { // display_window_flag
+ display_def->x = bytestream_get_be16(&buf);
+ display_def->y = bytestream_get_be16(&buf);
+ display_def->width = bytestream_get_be16(&buf) - display_def->x + 1;
+ display_def->height = bytestream_get_be16(&buf) - display_def->y + 1;
+ }
+}
+
static int dvbsub_display_end_segment(AVCodecContext *avctx, const uint8_t *buf,
int buf_size, AVSubtitle *sub)
{
- DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
+ DVBSubContext *ctx = avctx->priv_data;
+ DVBSubDisplayDefinition *display_def = ctx->display_definition;
DVBSubRegion *region;
DVBSubRegionDisplay *display;
DVBSubCLUT *clut;
uint32_t *clut_table;
int i;
+ int offset_x=0, offset_y=0;
sub->rects = NULL;
sub->start_display_time = 0;
sub->end_display_time = ctx->time_out * 1000;
sub->format = 0;
+ if (display_def) {
+ offset_x = display_def->x;
+ offset_y = display_def->y;
+ }
+
sub->num_rects = ctx->display_list_size;
- if (sub->num_rects > 0)
- sub->rects = av_mallocz(sizeof(AVSubtitleRect) * sub->num_rects);
+ 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]));
+ }
i = 0;
for (display = ctx->display_list; display; display = display->next) {
region = get_region(ctx, display->region_id);
- rect = &sub->rects[i];
+ rect = sub->rects[i];
if (!region)
continue;
- rect->x = display->x_pos;
- rect->y = display->y_pos;
+ 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->linesize = region->width;
+ rect->type = SUBTITLE_BITMAP;
+ rect->pict.linesize[0] = region->width;
clut = get_clut(ctx, region->clut);
break;
}
- rect->rgba_palette = av_malloc((1 << region->depth) * sizeof(uint32_t));
- memcpy(rect->rgba_palette, clut_table, (1 << region->depth) * sizeof(uint32_t));
+ rect->pict.data[1] = av_mallocz(AVPALETTE_SIZE);
+ memcpy(rect->pict.data[1], clut_table, (1 << region->depth) * sizeof(uint32_t));
- rect->bitmap = av_malloc(region->buf_size);
- memcpy(rect->bitmap, region->pbuf, region->buf_size);
+ rect->pict.data[0] = av_malloc(region->buf_size);
+ memcpy(rect->pict.data[0], region->pbuf, region->buf_size);
i++;
}
static int dvbsub_decode(AVCodecContext *avctx,
void *data, int *data_size,
- const uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
- DVBSubContext *ctx = (DVBSubContext*) avctx->priv_data;
- AVSubtitle *sub = (AVSubtitle*) data;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ DVBSubContext *ctx = avctx->priv_data;
+ AVSubtitle *sub = data;
const uint8_t *p, *p_end;
int segment_type;
int page_id;
segment_length = AV_RB16(p);
p += 2;
- if (page_id == ctx->composition_id || page_id == ctx->ancillary_id) {
+ if (page_id == ctx->composition_id || page_id == ctx->ancillary_id ||
+ ctx->composition_id == -1 || ctx->ancillary_id == -1) {
switch (segment_type) {
case DVBSUB_PAGE_SEGMENT:
dvbsub_parse_page_segment(avctx, p, segment_length);
case DVBSUB_OBJECT_SEGMENT:
dvbsub_parse_object_segment(avctx, p, segment_length);
break;
+ case DVBSUB_DISPLAYDEFINITION_SEGMENT:
+ dvbsub_parse_display_definition_segment(avctx, p, segment_length);
case DVBSUB_DISPLAY_SEGMENT:
*data_size = dvbsub_display_end_segment(avctx, p, segment_length, sub);
break;
default:
-#ifdef DEBUG
- av_log(avctx, AV_LOG_INFO, "Subtitling segment type 0x%x, page id %d, length %d\n",
+ dprintf(avctx, "Subtitling segment type 0x%x, page id %d, length %d\n",
segment_type, page_id, segment_length);
-#endif
break;
}
}
}
if (p != p_end) {
-#ifdef DEBUG
- av_log(avctx, AV_LOG_INFO, "Junk at end of packet\n");
-#endif
+ dprintf(avctx, "Junk at end of packet\n");
return -1;
}
AVCodec dvbsub_decoder = {
"dvbsub",
- CODEC_TYPE_SUBTITLE,
+ AVMEDIA_TYPE_SUBTITLE,
CODEC_ID_DVB_SUBTITLE,
sizeof(DVBSubContext),
dvbsub_init_decoder,
NULL,
dvbsub_close_decoder,
dvbsub_decode,
+ .long_name = NULL_IF_CONFIG_SMALL("DVB subtitles"),
};
projects / ffmpeg / blobdiff