mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
1725 lines
49 KiB
C
1725 lines
49 KiB
C
/*
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* DVB subtitle decoding
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* Copyright (c) 2005 Ian Caulfield
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*
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* This file is part of FFmpeg.
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*
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* 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
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* 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
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* 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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*/
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#include "avcodec.h"
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#include "get_bits.h"
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#include "bytestream.h"
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#include "internal.h"
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#include "libavutil/colorspace.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/opt.h"
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#define DVBSUB_PAGE_SEGMENT 0x10
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#define DVBSUB_REGION_SEGMENT 0x11
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#define DVBSUB_CLUT_SEGMENT 0x12
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#define DVBSUB_OBJECT_SEGMENT 0x13
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#define DVBSUB_DISPLAYDEFINITION_SEGMENT 0x14
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#define DVBSUB_DISPLAY_SEGMENT 0x80
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#define cm (ff_crop_tab + MAX_NEG_CROP)
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#define RGBA(r,g,b,a) (((unsigned)(a) << 24) | ((r) << 16) | ((g) << 8) | (b))
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typedef struct DVBSubCLUT {
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int id;
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int version;
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uint32_t clut4[4];
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uint32_t clut16[16];
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uint32_t clut256[256];
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struct DVBSubCLUT *next;
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} DVBSubCLUT;
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static DVBSubCLUT default_clut;
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typedef struct DVBSubObjectDisplay {
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int object_id;
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int region_id;
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int x_pos;
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int y_pos;
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int fgcolor;
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int bgcolor;
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struct DVBSubObjectDisplay *region_list_next;
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struct DVBSubObjectDisplay *object_list_next;
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} DVBSubObjectDisplay;
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typedef struct DVBSubObject {
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int id;
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int version;
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int type;
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DVBSubObjectDisplay *display_list;
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struct DVBSubObject *next;
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} DVBSubObject;
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typedef struct DVBSubRegionDisplay {
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int region_id;
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int x_pos;
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int y_pos;
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struct DVBSubRegionDisplay *next;
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} DVBSubRegionDisplay;
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typedef struct DVBSubRegion {
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int id;
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int version;
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int width;
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int height;
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int depth;
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int clut;
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int bgcolor;
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uint8_t *pbuf;
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int buf_size;
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int dirty;
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DVBSubObjectDisplay *display_list;
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struct DVBSubRegion *next;
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} DVBSubRegion;
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typedef struct DVBSubDisplayDefinition {
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int version;
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int x;
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int y;
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int width;
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int height;
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} DVBSubDisplayDefinition;
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typedef struct DVBSubContext {
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AVClass *class;
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int composition_id;
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int ancillary_id;
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int version;
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int time_out;
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int compute_edt; /**< if 1 end display time calculated using pts
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if 0 (Default) calculated using time out */
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int compute_clut;
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int substream;
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int64_t prev_start;
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DVBSubRegion *region_list;
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DVBSubCLUT *clut_list;
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DVBSubObject *object_list;
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DVBSubRegionDisplay *display_list;
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DVBSubDisplayDefinition *display_definition;
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} DVBSubContext;
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static DVBSubObject* get_object(DVBSubContext *ctx, int object_id)
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{
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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;
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}
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static DVBSubCLUT* get_clut(DVBSubContext *ctx, int clut_id)
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{
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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;
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}
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static DVBSubRegion* get_region(DVBSubContext *ctx, int region_id)
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{
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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;
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}
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static void delete_region_display_list(DVBSubContext *ctx, DVBSubRegion *region)
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{
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DVBSubObject *object, *obj2, **obj2_ptr;
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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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object = get_object(ctx, display->object_id);
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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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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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if (obj_disp) {
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*obj_disp_ptr = obj_disp->object_list_next;
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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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while (obj2 != object) {
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av_assert0(obj2);
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obj2_ptr = &obj2->next;
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obj2 = *obj2_ptr;
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}
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*obj2_ptr = obj2->next;
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av_freep(&obj2);
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}
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}
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}
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region->display_list = display->region_list_next;
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av_freep(&display);
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}
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}
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static void delete_cluts(DVBSubContext *ctx)
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{
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while (ctx->clut_list) {
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DVBSubCLUT *clut = ctx->clut_list;
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ctx->clut_list = clut->next;
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av_freep(&clut);
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}
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}
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static void delete_objects(DVBSubContext *ctx)
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{
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while (ctx->object_list) {
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DVBSubObject *object = ctx->object_list;
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ctx->object_list = object->next;
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av_freep(&object);
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}
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}
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static void delete_regions(DVBSubContext *ctx)
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{
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while (ctx->region_list) {
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DVBSubRegion *region = ctx->region_list;
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ctx->region_list = region->next;
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delete_region_display_list(ctx, region);
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av_freep(®ion->pbuf);
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av_freep(®ion);
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}
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}
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static av_cold int dvbsub_init_decoder(AVCodecContext *avctx)
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{
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int i, r, g, b, a = 0;
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DVBSubContext *ctx = avctx->priv_data;
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if (ctx->substream < 0) {
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ctx->composition_id = -1;
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ctx->ancillary_id = -1;
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} else if (!avctx->extradata || (avctx->extradata_size < 4) || ((avctx->extradata_size % 5 != 0) && (avctx->extradata_size != 4))) {
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av_log(avctx, AV_LOG_WARNING, "Invalid DVB subtitles stream extradata!\n");
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ctx->composition_id = -1;
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ctx->ancillary_id = -1;
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} else {
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if (avctx->extradata_size > 5*ctx->substream + 2) {
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ctx->composition_id = AV_RB16(avctx->extradata + 5*ctx->substream);
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ctx->ancillary_id = AV_RB16(avctx->extradata + 5*ctx->substream + 2);
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} else {
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av_log(avctx, AV_LOG_WARNING, "Selected DVB subtitles sub-stream %d is not available\n", ctx->substream);
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ctx->composition_id = AV_RB16(avctx->extradata);
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ctx->ancillary_id = AV_RB16(avctx->extradata + 2);
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}
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}
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ctx->version = -1;
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ctx->prev_start = AV_NOPTS_VALUE;
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default_clut.id = -1;
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default_clut.next = NULL;
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default_clut.clut4[0] = RGBA( 0, 0, 0, 0);
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default_clut.clut4[1] = RGBA(255, 255, 255, 255);
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default_clut.clut4[2] = RGBA( 0, 0, 0, 255);
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default_clut.clut4[3] = RGBA(127, 127, 127, 255);
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default_clut.clut16[0] = RGBA( 0, 0, 0, 0);
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for (i = 1; i < 16; i++) {
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if (i < 8) {
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r = (i & 1) ? 255 : 0;
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g = (i & 2) ? 255 : 0;
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b = (i & 4) ? 255 : 0;
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} else {
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r = (i & 1) ? 127 : 0;
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g = (i & 2) ? 127 : 0;
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b = (i & 4) ? 127 : 0;
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}
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default_clut.clut16[i] = RGBA(r, g, b, 255);
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}
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default_clut.clut256[0] = RGBA( 0, 0, 0, 0);
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for (i = 1; i < 256; i++) {
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if (i < 8) {
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r = (i & 1) ? 255 : 0;
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g = (i & 2) ? 255 : 0;
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b = (i & 4) ? 255 : 0;
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a = 63;
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} else {
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switch (i & 0x88) {
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case 0x00:
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r = ((i & 1) ? 85 : 0) + ((i & 0x10) ? 170 : 0);
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g = ((i & 2) ? 85 : 0) + ((i & 0x20) ? 170 : 0);
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b = ((i & 4) ? 85 : 0) + ((i & 0x40) ? 170 : 0);
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a = 255;
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break;
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case 0x08:
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r = ((i & 1) ? 85 : 0) + ((i & 0x10) ? 170 : 0);
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g = ((i & 2) ? 85 : 0) + ((i & 0x20) ? 170 : 0);
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b = ((i & 4) ? 85 : 0) + ((i & 0x40) ? 170 : 0);
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a = 127;
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break;
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case 0x80:
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r = 127 + ((i & 1) ? 43 : 0) + ((i & 0x10) ? 85 : 0);
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g = 127 + ((i & 2) ? 43 : 0) + ((i & 0x20) ? 85 : 0);
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b = 127 + ((i & 4) ? 43 : 0) + ((i & 0x40) ? 85 : 0);
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a = 255;
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break;
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case 0x88:
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r = ((i & 1) ? 43 : 0) + ((i & 0x10) ? 85 : 0);
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g = ((i & 2) ? 43 : 0) + ((i & 0x20) ? 85 : 0);
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b = ((i & 4) ? 43 : 0) + ((i & 0x40) ? 85 : 0);
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a = 255;
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break;
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}
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}
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default_clut.clut256[i] = RGBA(r, g, b, a);
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}
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return 0;
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}
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static av_cold int dvbsub_close_decoder(AVCodecContext *avctx)
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{
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DVBSubContext *ctx = avctx->priv_data;
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DVBSubRegionDisplay *display;
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delete_regions(ctx);
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delete_objects(ctx);
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delete_cluts(ctx);
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av_freep(&ctx->display_definition);
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while (ctx->display_list) {
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display = ctx->display_list;
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ctx->display_list = display->next;
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av_freep(&display);
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}
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return 0;
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}
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static int dvbsub_read_2bit_string(AVCodecContext *avctx,
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uint8_t *destbuf, int dbuf_len,
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const uint8_t **srcbuf, int buf_size,
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int non_mod, uint8_t *map_table, int x_pos)
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{
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GetBitContext gb;
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int bits;
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int run_length;
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int pixels_read = x_pos;
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init_get_bits(&gb, *srcbuf, buf_size << 3);
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destbuf += x_pos;
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while (get_bits_count(&gb) < buf_size << 3 && pixels_read < dbuf_len) {
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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];
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else
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*destbuf++ = bits;
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}
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pixels_read++;
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} else {
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bits = get_bits1(&gb);
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if (bits == 1) {
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run_length = get_bits(&gb, 3) + 3;
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bits = get_bits(&gb, 2);
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if (non_mod == 1 && bits == 1)
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pixels_read += run_length;
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else {
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if (map_table)
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bits = map_table[bits];
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while (run_length-- > 0 && pixels_read < dbuf_len) {
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*destbuf++ = bits;
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pixels_read++;
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}
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}
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} else {
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bits = get_bits1(&gb);
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if (bits == 0) {
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bits = get_bits(&gb, 2);
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if (bits == 2) {
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run_length = get_bits(&gb, 4) + 12;
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bits = get_bits(&gb, 2);
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if (non_mod == 1 && bits == 1)
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pixels_read += run_length;
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else {
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if (map_table)
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bits = map_table[bits];
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while (run_length-- > 0 && pixels_read < dbuf_len) {
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*destbuf++ = bits;
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pixels_read++;
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}
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}
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} else if (bits == 3) {
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run_length = get_bits(&gb, 8) + 29;
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bits = get_bits(&gb, 2);
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if (non_mod == 1 && bits == 1)
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pixels_read += run_length;
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else {
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if (map_table)
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bits = map_table[bits];
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while (run_length-- > 0 && pixels_read < dbuf_len) {
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*destbuf++ = bits;
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pixels_read++;
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}
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}
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} else if (bits == 1) {
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if (map_table)
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bits = map_table[0];
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else
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bits = 0;
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run_length = 2;
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while (run_length-- > 0 && pixels_read < dbuf_len) {
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*destbuf++ = bits;
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pixels_read++;
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}
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} else {
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(*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
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return pixels_read;
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}
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} else {
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if (map_table)
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bits = map_table[0];
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else
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bits = 0;
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*destbuf++ = bits;
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pixels_read++;
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}
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}
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}
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}
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if (get_bits(&gb, 6))
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av_log(avctx, AV_LOG_ERROR, "line overflow\n");
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(*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
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return pixels_read;
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}
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static int dvbsub_read_4bit_string(AVCodecContext *avctx, uint8_t *destbuf, int dbuf_len,
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const uint8_t **srcbuf, int buf_size,
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int non_mod, uint8_t *map_table, int x_pos)
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{
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GetBitContext gb;
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int bits;
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int run_length;
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int pixels_read = x_pos;
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init_get_bits(&gb, *srcbuf, buf_size << 3);
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destbuf += x_pos;
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while (get_bits_count(&gb) < buf_size << 3 && pixels_read < dbuf_len) {
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bits = get_bits(&gb, 4);
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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];
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else
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*destbuf++ = bits;
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}
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pixels_read++;
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} else {
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bits = get_bits1(&gb);
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if (bits == 0) {
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run_length = get_bits(&gb, 3);
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if (run_length == 0) {
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(*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
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return pixels_read;
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}
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run_length += 2;
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if (map_table)
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bits = map_table[0];
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else
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bits = 0;
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while (run_length-- > 0 && pixels_read < dbuf_len) {
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*destbuf++ = bits;
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pixels_read++;
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}
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} else {
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bits = get_bits1(&gb);
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if (bits == 0) {
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run_length = get_bits(&gb, 2) + 4;
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bits = get_bits(&gb, 4);
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if (non_mod == 1 && bits == 1)
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pixels_read += run_length;
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else {
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if (map_table)
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bits = map_table[bits];
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while (run_length-- > 0 && pixels_read < dbuf_len) {
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*destbuf++ = bits;
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pixels_read++;
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}
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}
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} else {
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bits = get_bits(&gb, 2);
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if (bits == 2) {
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run_length = get_bits(&gb, 4) + 9;
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bits = get_bits(&gb, 4);
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if (non_mod == 1 && bits == 1)
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pixels_read += run_length;
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else {
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if (map_table)
|
|
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 {
|
|
if (map_table)
|
|
bits = map_table[bits];
|
|
while (run_length-- > 0 && pixels_read < dbuf_len) {
|
|
*destbuf++ = bits;
|
|
pixels_read++;
|
|
}
|
|
}
|
|
} else if (bits == 1) {
|
|
if (map_table)
|
|
bits = map_table[0];
|
|
else
|
|
bits = 0;
|
|
run_length = 2;
|
|
while (run_length-- > 0 && pixels_read < dbuf_len) {
|
|
*destbuf++ = bits;
|
|
pixels_read++;
|
|
}
|
|
} else {
|
|
if (map_table)
|
|
bits = map_table[0];
|
|
else
|
|
bits = 0;
|
|
*destbuf++ = bits;
|
|
pixels_read ++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (get_bits(&gb, 8))
|
|
av_log(avctx, AV_LOG_ERROR, "line overflow\n");
|
|
|
|
(*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
|
|
|
|
return pixels_read;
|
|
}
|
|
|
|
static int dvbsub_read_8bit_string(AVCodecContext *avctx,
|
|
uint8_t *destbuf, int dbuf_len,
|
|
const uint8_t **srcbuf, int buf_size,
|
|
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 = x_pos;
|
|
|
|
destbuf += x_pos;
|
|
|
|
while (*srcbuf < sbuf_end && pixels_read < dbuf_len) {
|
|
bits = *(*srcbuf)++;
|
|
|
|
if (bits) {
|
|
if (non_mod != 1 || bits != 1) {
|
|
if (map_table)
|
|
*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;
|
|
}
|
|
|
|
bits = 0;
|
|
} else {
|
|
bits = *(*srcbuf)++;
|
|
}
|
|
if (non_mod == 1 && bits == 1)
|
|
pixels_read += run_length;
|
|
else {
|
|
if (map_table)
|
|
bits = map_table[bits];
|
|
while (run_length-- > 0 && pixels_read < dbuf_len) {
|
|
*destbuf++ = bits;
|
|
pixels_read++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (*(*srcbuf)++)
|
|
av_log(avctx, AV_LOG_ERROR, "line overflow\n");
|
|
|
|
return pixels_read;
|
|
}
|
|
|
|
static void compute_default_clut(AVSubtitleRect *rect, int w, int h)
|
|
{
|
|
uint8_t list[256] = {0};
|
|
uint8_t list_inv[256];
|
|
int counttab[256] = {0};
|
|
int count, i, x, y;
|
|
ptrdiff_t stride = rect->linesize[0];
|
|
#define V(x,y) rect->data[0][(x) + (y)*stride]
|
|
for (y = 0; y<h; y++) {
|
|
for (x = 0; x<w; x++) {
|
|
int v = V(x,y) + 1;
|
|
int vl = x ? V(x-1,y) + 1 : 0;
|
|
int vr = x+1<w ? V(x+1,y) + 1 : 0;
|
|
int vt = y ? V(x,y-1) + 1 : 0;
|
|
int vb = y+1<h ? V(x,y+1) + 1 : 0;
|
|
counttab[v-1] += !!((v!=vl) + (v!=vr) + (v!=vt) + (v!=vb));
|
|
}
|
|
}
|
|
#define L(x,y) list[d[(x) + (y)*stride]]
|
|
|
|
for (i = 0; i<256; i++) {
|
|
int scoretab[256] = {0};
|
|
int bestscore = 0;
|
|
int bestv = 0;
|
|
for (y = 0; y<h; y++) {
|
|
for (x = 0; x<w; x++) {
|
|
uint8_t *d = &rect->data[0][x + y*stride];
|
|
int v = *d;
|
|
int l_m = list[v];
|
|
int l_l = x ? L(-1, 0) : 1;
|
|
int l_r = x+1<w ? L( 1, 0) : 1;
|
|
int l_t = y ? L( 0,-1) : 1;
|
|
int l_b = y+1<h ? L( 0, 1) : 1;
|
|
int score;
|
|
if (l_m)
|
|
continue;
|
|
scoretab[v] += l_l + l_r + l_t + l_b;
|
|
score = 1024LL*scoretab[v] / counttab[v];
|
|
if (score > bestscore) {
|
|
bestscore = score;
|
|
bestv = v;
|
|
}
|
|
}
|
|
}
|
|
if (!bestscore)
|
|
break;
|
|
list [ bestv ] = 1;
|
|
list_inv[ i ] = bestv;
|
|
}
|
|
|
|
count = FFMAX(i - 1, 1);
|
|
for (i--; i>=0; i--) {
|
|
int v = i*255/count;
|
|
AV_WN32(rect->data[1] + 4*list_inv[i], RGBA(v/2,v,v/2,v));
|
|
}
|
|
}
|
|
|
|
|
|
static int save_subtitle_set(AVCodecContext *avctx, AVSubtitle *sub, int *got_output)
|
|
{
|
|
DVBSubContext *ctx = avctx->priv_data;
|
|
DVBSubRegionDisplay *display;
|
|
DVBSubDisplayDefinition *display_def = ctx->display_definition;
|
|
DVBSubRegion *region;
|
|
AVSubtitleRect *rect;
|
|
DVBSubCLUT *clut;
|
|
uint32_t *clut_table;
|
|
int i;
|
|
int offset_x=0, offset_y=0;
|
|
int ret = 0;
|
|
|
|
|
|
if (display_def) {
|
|
offset_x = display_def->x;
|
|
offset_y = display_def->y;
|
|
}
|
|
|
|
/* Not touching AVSubtitles again*/
|
|
if(sub->num_rects) {
|
|
avpriv_request_sample(ctx, "Different Version of Segment asked Twice");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
for (display = ctx->display_list; display; display = display->next) {
|
|
region = get_region(ctx, display->region_id);
|
|
if (region && region->dirty)
|
|
sub->num_rects++;
|
|
}
|
|
|
|
if(ctx->compute_edt == 0) {
|
|
sub->end_display_time = ctx->time_out * 1000;
|
|
*got_output = 1;
|
|
} else if (ctx->prev_start != AV_NOPTS_VALUE) {
|
|
sub->end_display_time = av_rescale_q((sub->pts - ctx->prev_start ), AV_TIME_BASE_Q, (AVRational){ 1, 1000 }) - 1;
|
|
*got_output = 1;
|
|
}
|
|
if (sub->num_rects > 0) {
|
|
|
|
sub->rects = av_mallocz_array(sizeof(*sub->rects), sub->num_rects);
|
|
if (!sub->rects) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
|
|
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);
|
|
|
|
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 = (1 << region->depth);
|
|
rect->type = SUBTITLE_BITMAP;
|
|
rect->linesize[0] = region->width;
|
|
|
|
clut = get_clut(ctx, region->clut);
|
|
|
|
if (!clut)
|
|
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;
|
|
}
|
|
|
|
rect->data[1] = av_mallocz(AVPALETTE_SIZE);
|
|
if (!rect->data[1]) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
memcpy(rect->data[1], clut_table, (1 << region->depth) * sizeof(uint32_t));
|
|
|
|
rect->data[0] = av_malloc(region->buf_size);
|
|
if (!rect->data[0]) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
|
|
memcpy(rect->data[0], region->pbuf, region->buf_size);
|
|
|
|
if ((clut == &default_clut && ctx->compute_clut == -1) || ctx->compute_clut == 1)
|
|
compute_default_clut(rect, rect->w, rect->h);
|
|
|
|
#if FF_API_AVPICTURE
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
{
|
|
int j;
|
|
for (j = 0; j < 4; j++) {
|
|
rect->pict.data[j] = rect->data[j];
|
|
rect->pict.linesize[j] = rect->linesize[j];
|
|
}
|
|
}
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#endif
|
|
|
|
i++;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
fail:
|
|
if (sub->rects) {
|
|
for(i=0; i<sub->num_rects; i++) {
|
|
rect = sub->rects[i];
|
|
if (rect) {
|
|
av_freep(&rect->data[0]);
|
|
av_freep(&rect->data[1]);
|
|
}
|
|
av_freep(&sub->rects[i]);
|
|
}
|
|
av_freep(&sub->rects);
|
|
}
|
|
sub->num_rects = 0;
|
|
return ret;
|
|
}
|
|
|
|
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 = avctx->priv_data;
|
|
|
|
DVBSubRegion *region = get_region(ctx, display->region_id);
|
|
const uint8_t *buf_end = buf + buf_size;
|
|
uint8_t *pbuf;
|
|
int x_pos, y_pos;
|
|
int i;
|
|
|
|
uint8_t map2to4[] = { 0x0, 0x7, 0x8, 0xf};
|
|
uint8_t map2to8[] = {0x00, 0x77, 0x88, 0xff};
|
|
uint8_t map4to8[] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
|
|
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff};
|
|
uint8_t *map_table;
|
|
|
|
#if 0
|
|
ff_dlog(avctx, "DVB pixel block size %d, %s field:\n", buf_size,
|
|
top_bottom ? "bottom" : "top");
|
|
|
|
for (i = 0; i < buf_size; i++) {
|
|
if (i % 16 == 0)
|
|
ff_dlog(avctx, "0x%8p: ", buf+i);
|
|
|
|
ff_dlog(avctx, "%02x ", buf[i]);
|
|
if (i % 16 == 15)
|
|
ff_dlog(avctx, "\n");
|
|
}
|
|
|
|
if (i % 16)
|
|
ff_dlog(avctx, "\n");
|
|
#endif
|
|
|
|
if (!region)
|
|
return;
|
|
|
|
pbuf = region->pbuf;
|
|
region->dirty = 1;
|
|
|
|
x_pos = display->x_pos;
|
|
y_pos = display->y_pos;
|
|
|
|
y_pos += top_bottom;
|
|
|
|
while (buf < buf_end) {
|
|
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;
|
|
}
|
|
|
|
switch (*buf++) {
|
|
case 0x10:
|
|
if (region->depth == 8)
|
|
map_table = map2to8;
|
|
else if (region->depth == 4)
|
|
map_table = map2to4;
|
|
else
|
|
map_table = NULL;
|
|
|
|
x_pos = dvbsub_read_2bit_string(avctx, pbuf + (y_pos * region->width),
|
|
region->width, &buf, buf_end - buf,
|
|
non_mod, map_table, x_pos);
|
|
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;
|
|
}
|
|
|
|
if (region->depth == 8)
|
|
map_table = map4to8;
|
|
else
|
|
map_table = NULL;
|
|
|
|
x_pos = dvbsub_read_4bit_string(avctx, pbuf + (y_pos * region->width),
|
|
region->width, &buf, buf_end - buf,
|
|
non_mod, map_table, x_pos);
|
|
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;
|
|
}
|
|
|
|
x_pos = dvbsub_read_8bit_string(avctx, pbuf + (y_pos * region->width),
|
|
region->width, &buf, buf_end - buf,
|
|
non_mod, NULL, x_pos);
|
|
break;
|
|
|
|
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;
|
|
|
|
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));
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
static int dvbsub_parse_object_segment(AVCodecContext *avctx,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
DVBSubContext *ctx = avctx->priv_data;
|
|
|
|
const uint8_t *buf_end = buf + buf_size;
|
|
int object_id;
|
|
DVBSubObject *object;
|
|
DVBSubObjectDisplay *display;
|
|
int top_field_len, bottom_field_len;
|
|
|
|
int coding_method, non_modifying_color;
|
|
|
|
object_id = AV_RB16(buf);
|
|
buf += 2;
|
|
|
|
object = get_object(ctx, object_id);
|
|
|
|
if (!object)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
coding_method = ((*buf) >> 2) & 3;
|
|
non_modifying_color = ((*buf++) >> 1) & 1;
|
|
|
|
if (coding_method == 0) {
|
|
top_field_len = AV_RB16(buf);
|
|
buf += 2;
|
|
bottom_field_len = AV_RB16(buf);
|
|
buf += 2;
|
|
|
|
if (buf + top_field_len + bottom_field_len > buf_end) {
|
|
av_log(avctx, AV_LOG_ERROR, "Field data size %d+%d too large\n", top_field_len, bottom_field_len);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
for (display = object->display_list; display; display = display->object_list_next) {
|
|
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
|
|
bfl = top_field_len;
|
|
|
|
dvbsub_parse_pixel_data_block(avctx, display, block, bfl, 1,
|
|
non_modifying_color);
|
|
}
|
|
|
|
/* } else if (coding_method == 1) {*/
|
|
|
|
} else {
|
|
av_log(avctx, AV_LOG_ERROR, "Unknown object coding %d\n", coding_method);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dvbsub_parse_clut_segment(AVCodecContext *avctx,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
DVBSubContext *ctx = avctx->priv_data;
|
|
|
|
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;
|
|
int r, g, b, r_add, g_add, b_add;
|
|
|
|
ff_dlog(avctx, "DVB clut packet:\n");
|
|
|
|
for (i=0; i < buf_size; i++) {
|
|
ff_dlog(avctx, "%02x ", buf[i]);
|
|
if (i % 16 == 15)
|
|
ff_dlog(avctx, "\n");
|
|
}
|
|
|
|
if (i % 16)
|
|
ff_dlog(avctx, "\n");
|
|
|
|
clut_id = *buf++;
|
|
version = ((*buf)>>4)&15;
|
|
buf += 1;
|
|
|
|
clut = get_clut(ctx, clut_id);
|
|
|
|
if (!clut) {
|
|
clut = av_malloc(sizeof(DVBSubCLUT));
|
|
if (!clut)
|
|
return AVERROR(ENOMEM);
|
|
|
|
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++;
|
|
|
|
depth = (*buf) & 0xe0;
|
|
|
|
if (depth == 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid clut depth 0x%x!\n", *buf);
|
|
}
|
|
|
|
full_range = (*buf++) & 1;
|
|
|
|
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;
|
|
|
|
buf += 2;
|
|
}
|
|
|
|
if (y == 0)
|
|
alpha = 0xff;
|
|
|
|
YUV_TO_RGB1_CCIR(cb, cr);
|
|
YUV_TO_RGB2_CCIR(r, g, b, y);
|
|
|
|
ff_dlog(avctx, "clut %d := (%d,%d,%d,%d)\n", entry_id, r, g, b, alpha);
|
|
if (!!(depth & 0x80) + !!(depth & 0x40) + !!(depth & 0x20) > 1) {
|
|
ff_dlog(avctx, "More than one bit level marked: %x\n", depth);
|
|
if (avctx->strict_std_compliance > FF_COMPLIANCE_NORMAL)
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (depth & 0x80 && entry_id < 4)
|
|
clut->clut4[entry_id] = RGBA(r,g,b,255 - alpha);
|
|
else if (depth & 0x40 && entry_id < 16)
|
|
clut->clut16[entry_id] = RGBA(r,g,b,255 - alpha);
|
|
else if (depth & 0x20)
|
|
clut->clut256[entry_id] = RGBA(r,g,b,255 - alpha);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int dvbsub_parse_region_segment(AVCodecContext *avctx,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
DVBSubContext *ctx = avctx->priv_data;
|
|
|
|
const uint8_t *buf_end = buf + buf_size;
|
|
int region_id, object_id;
|
|
int av_unused version;
|
|
DVBSubRegion *region;
|
|
DVBSubObject *object;
|
|
DVBSubObjectDisplay *display;
|
|
int fill;
|
|
int ret;
|
|
|
|
if (buf_size < 10)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
region_id = *buf++;
|
|
|
|
region = get_region(ctx, region_id);
|
|
|
|
if (!region) {
|
|
region = av_mallocz(sizeof(DVBSubRegion));
|
|
if (!region)
|
|
return AVERROR(ENOMEM);
|
|
|
|
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);
|
|
buf += 2;
|
|
region->height = AV_RB16(buf);
|
|
buf += 2;
|
|
|
|
ret = av_image_check_size2(region->width, region->height, avctx->max_pixels, AV_PIX_FMT_PAL8, 0, avctx);
|
|
if (ret >= 0 && region->width * region->height * 2 > 320 * 1024 * 8) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
av_log(avctx, AV_LOG_ERROR, "Pixel buffer memory constraint violated\n");
|
|
}
|
|
if (ret < 0) {
|
|
region->width= region->height= 0;
|
|
return ret;
|
|
}
|
|
|
|
if (region->width * region->height != region->buf_size) {
|
|
av_free(region->pbuf);
|
|
|
|
region->buf_size = region->width * region->height;
|
|
|
|
region->pbuf = av_malloc(region->buf_size);
|
|
if (!region->pbuf) {
|
|
region->buf_size =
|
|
region->width =
|
|
region->height = 0;
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
fill = 1;
|
|
region->dirty = 0;
|
|
}
|
|
|
|
region->depth = 1 << (((*buf++) >> 2) & 7);
|
|
if(region->depth<2 || region->depth>8){
|
|
av_log(avctx, AV_LOG_ERROR, "region depth %d is invalid\n", region->depth);
|
|
region->depth= 4;
|
|
}
|
|
region->clut = *buf++;
|
|
|
|
if (region->depth == 8) {
|
|
region->bgcolor = *buf++;
|
|
buf += 1;
|
|
} else {
|
|
buf += 1;
|
|
|
|
if (region->depth == 4)
|
|
region->bgcolor = (((*buf++) >> 4) & 15);
|
|
else
|
|
region->bgcolor = (((*buf++) >> 2) & 3);
|
|
}
|
|
|
|
ff_dlog(avctx, "Region %d, (%dx%d)\n", region_id, region->width, region->height);
|
|
|
|
if (fill) {
|
|
memset(region->pbuf, region->bgcolor, region->buf_size);
|
|
ff_dlog(avctx, "Fill region (%d)\n", region->bgcolor);
|
|
}
|
|
|
|
delete_region_display_list(ctx, region);
|
|
|
|
while (buf + 5 < buf_end) {
|
|
object_id = AV_RB16(buf);
|
|
buf += 2;
|
|
|
|
object = get_object(ctx, object_id);
|
|
|
|
if (!object) {
|
|
object = av_mallocz(sizeof(DVBSubObject));
|
|
if (!object)
|
|
return AVERROR(ENOMEM);
|
|
|
|
object->id = object_id;
|
|
object->next = ctx->object_list;
|
|
ctx->object_list = object;
|
|
}
|
|
|
|
object->type = (*buf) >> 6;
|
|
|
|
display = av_mallocz(sizeof(DVBSubObjectDisplay));
|
|
if (!display)
|
|
return AVERROR(ENOMEM);
|
|
|
|
display->object_id = object_id;
|
|
display->region_id = region_id;
|
|
|
|
display->x_pos = AV_RB16(buf) & 0xfff;
|
|
buf += 2;
|
|
display->y_pos = AV_RB16(buf) & 0xfff;
|
|
buf += 2;
|
|
|
|
if ((object->type == 1 || object->type == 2) && buf+1 < buf_end) {
|
|
display->fgcolor = *buf++;
|
|
display->bgcolor = *buf++;
|
|
}
|
|
|
|
display->region_list_next = region->display_list;
|
|
region->display_list = display;
|
|
|
|
display->object_list_next = object->display_list;
|
|
object->display_list = display;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dvbsub_parse_page_segment(AVCodecContext *avctx,
|
|
const uint8_t *buf, int buf_size, AVSubtitle *sub, int *got_output)
|
|
{
|
|
DVBSubContext *ctx = avctx->priv_data;
|
|
DVBSubRegionDisplay *display;
|
|
DVBSubRegionDisplay *tmp_display_list, **tmp_ptr;
|
|
|
|
const uint8_t *buf_end = buf + buf_size;
|
|
int region_id;
|
|
int page_state;
|
|
int timeout;
|
|
int version;
|
|
|
|
if (buf_size < 1)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
timeout = *buf++;
|
|
version = ((*buf)>>4) & 15;
|
|
page_state = ((*buf++) >> 2) & 3;
|
|
|
|
if (ctx->version == version) {
|
|
return 0;
|
|
}
|
|
|
|
ctx->time_out = timeout;
|
|
ctx->version = version;
|
|
|
|
ff_dlog(avctx, "Page time out %ds, state %d\n", ctx->time_out, page_state);
|
|
|
|
if(ctx->compute_edt == 1)
|
|
save_subtitle_set(avctx, sub, got_output);
|
|
|
|
if (page_state == 1 || page_state == 2) {
|
|
delete_regions(ctx);
|
|
delete_objects(ctx);
|
|
delete_cluts(ctx);
|
|
}
|
|
|
|
tmp_display_list = ctx->display_list;
|
|
ctx->display_list = NULL;
|
|
|
|
while (buf + 5 < buf_end) {
|
|
region_id = *buf++;
|
|
buf += 1;
|
|
|
|
display = ctx->display_list;
|
|
while (display && display->region_id != region_id) {
|
|
display = display->next;
|
|
}
|
|
if (display) {
|
|
av_log(avctx, AV_LOG_ERROR, "duplicate region\n");
|
|
break;
|
|
}
|
|
|
|
display = tmp_display_list;
|
|
tmp_ptr = &tmp_display_list;
|
|
|
|
while (display && display->region_id != region_id) {
|
|
tmp_ptr = &display->next;
|
|
display = display->next;
|
|
}
|
|
|
|
if (!display) {
|
|
display = av_mallocz(sizeof(DVBSubRegionDisplay));
|
|
if (!display)
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
display->region_id = region_id;
|
|
|
|
display->x_pos = AV_RB16(buf);
|
|
buf += 2;
|
|
display->y_pos = AV_RB16(buf);
|
|
buf += 2;
|
|
|
|
*tmp_ptr = display->next;
|
|
|
|
display->next = ctx->display_list;
|
|
ctx->display_list = display;
|
|
|
|
ff_dlog(avctx, "Region %d, (%d,%d)\n", region_id, display->x_pos, display->y_pos);
|
|
}
|
|
|
|
while (tmp_display_list) {
|
|
display = tmp_display_list;
|
|
|
|
tmp_display_list = display->next;
|
|
|
|
av_freep(&display);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
#ifdef DEBUG
|
|
static void png_save(DVBSubContext *ctx, const char *filename, uint32_t *bitmap, int w, int h)
|
|
{
|
|
int x, y, v;
|
|
FILE *f;
|
|
char fname[40], fname2[40];
|
|
char command[1024];
|
|
|
|
snprintf(fname, sizeof(fname), "%s.ppm", filename);
|
|
|
|
f = fopen(fname, "w");
|
|
if (!f) {
|
|
perror(fname);
|
|
return;
|
|
}
|
|
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);
|
|
|
|
|
|
snprintf(fname2, sizeof(fname2), "%s-a.pgm", filename);
|
|
|
|
f = fopen(fname2, "w");
|
|
if (!f) {
|
|
perror(fname2);
|
|
return;
|
|
}
|
|
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);
|
|
|
|
snprintf(command, sizeof(command), "pnmtopng -alpha %s %s > %s.png 2> /dev/null", fname2, fname, filename);
|
|
if (system(command) != 0) {
|
|
av_log(ctx, AV_LOG_ERROR, "Error running pnmtopng\n");
|
|
return;
|
|
}
|
|
|
|
snprintf(command, sizeof(command), "rm %s %s", fname, fname2);
|
|
if (system(command) != 0) {
|
|
av_log(ctx, AV_LOG_ERROR, "Error removing %s and %s\n", fname, fname2);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static int 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;
|
|
|
|
for (display = ctx->display_list; display; display = display->next) {
|
|
region = get_region(ctx, display->region_id);
|
|
|
|
if (!region)
|
|
return -1;
|
|
|
|
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;
|
|
}
|
|
|
|
if (display->y_pos < y_pos) {
|
|
height += (y_pos - display->y_pos);
|
|
y_pos = display->y_pos;
|
|
}
|
|
|
|
if (display->x_pos + region->width > x_pos + width) {
|
|
width = display->x_pos + region->width - x_pos;
|
|
}
|
|
|
|
if (display->y_pos + region->height > y_pos + height) {
|
|
height = display->y_pos + region->height - y_pos;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (x_pos >= 0) {
|
|
|
|
pbuf = av_malloc(width * height * 4);
|
|
if (!pbuf)
|
|
return -1;
|
|
|
|
for (display = ctx->display_list; display; display = display->next) {
|
|
region = get_region(ctx, display->region_id);
|
|
|
|
if (!region)
|
|
return -1;
|
|
|
|
x_off = display->x_pos - x_pos;
|
|
y_off = display->y_pos - y_pos;
|
|
|
|
clut = get_clut(ctx, region->clut);
|
|
|
|
if (!clut)
|
|
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;
|
|
}
|
|
|
|
for (y = 0; y < region->height; y++) {
|
|
for (x = 0; x < region->width; x++) {
|
|
pbuf[((y + y_off) * width) + x_off + x] =
|
|
clut_table[region->pbuf[y * region->width + x]];
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
snprintf(filename, sizeof(filename), "dvbs.%d", fileno_index);
|
|
|
|
png_save(ctx, filename, pbuf, width, height);
|
|
|
|
av_freep(&pbuf);
|
|
}
|
|
|
|
fileno_index++;
|
|
return 0;
|
|
}
|
|
#endif /* DEBUG */
|
|
|
|
static int 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 AVERROR_INVALIDDATA;
|
|
|
|
info_byte = bytestream_get_byte(&buf);
|
|
dds_version = info_byte >> 4;
|
|
if (display_def && display_def->version == dds_version)
|
|
return 0; // already have this display definition version
|
|
|
|
if (!display_def) {
|
|
display_def = av_mallocz(sizeof(*display_def));
|
|
if (!display_def)
|
|
return AVERROR(ENOMEM);
|
|
ctx->display_definition = display_def;
|
|
}
|
|
|
|
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 (!avctx->width || !avctx->height) {
|
|
avctx->width = display_def->width;
|
|
avctx->height = display_def->height;
|
|
}
|
|
|
|
if (info_byte & 1<<3) { // display_window_flag
|
|
if (buf_size < 13)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
display_def->x = bytestream_get_be16(&buf);
|
|
display_def->width = bytestream_get_be16(&buf) - display_def->x + 1;
|
|
display_def->y = bytestream_get_be16(&buf);
|
|
display_def->height = bytestream_get_be16(&buf) - display_def->y + 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dvbsub_display_end_segment(AVCodecContext *avctx, const uint8_t *buf,
|
|
int buf_size, AVSubtitle *sub,int *got_output)
|
|
{
|
|
DVBSubContext *ctx = avctx->priv_data;
|
|
|
|
if(ctx->compute_edt == 0)
|
|
save_subtitle_set(avctx, sub, got_output);
|
|
#ifdef DEBUG
|
|
save_display_set(ctx);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int dvbsub_decode(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
AVPacket *avpkt)
|
|
{
|
|
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;
|
|
int segment_length;
|
|
int i;
|
|
int ret = 0;
|
|
int got_segment = 0;
|
|
int got_dds = 0;
|
|
|
|
ff_dlog(avctx, "DVB sub packet:\n");
|
|
|
|
for (i=0; i < buf_size; i++) {
|
|
ff_dlog(avctx, "%02x ", buf[i]);
|
|
if (i % 16 == 15)
|
|
ff_dlog(avctx, "\n");
|
|
}
|
|
|
|
if (i % 16)
|
|
ff_dlog(avctx, "\n");
|
|
|
|
if (buf_size <= 6 || *buf != 0x0f) {
|
|
ff_dlog(avctx, "incomplete or broken packet");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
p = buf;
|
|
p_end = buf + buf_size;
|
|
|
|
while (p_end - p >= 6 && *p == 0x0f) {
|
|
p += 1;
|
|
segment_type = *p++;
|
|
page_id = AV_RB16(p);
|
|
p += 2;
|
|
segment_length = AV_RB16(p);
|
|
p += 2;
|
|
|
|
if (avctx->debug & FF_DEBUG_STARTCODE) {
|
|
av_log(avctx, AV_LOG_DEBUG, "segment_type:%d page_id:%d segment_length:%d\n", segment_type, page_id, segment_length);
|
|
}
|
|
|
|
if (p_end - p < segment_length) {
|
|
ff_dlog(avctx, "incomplete or broken packet");
|
|
ret = -1;
|
|
goto end;
|
|
}
|
|
|
|
if (page_id == ctx->composition_id || page_id == ctx->ancillary_id ||
|
|
ctx->composition_id == -1 || ctx->ancillary_id == -1) {
|
|
int ret = 0;
|
|
switch (segment_type) {
|
|
case DVBSUB_PAGE_SEGMENT:
|
|
ret = dvbsub_parse_page_segment(avctx, p, segment_length, sub, data_size);
|
|
got_segment |= 1;
|
|
break;
|
|
case DVBSUB_REGION_SEGMENT:
|
|
ret = dvbsub_parse_region_segment(avctx, p, segment_length);
|
|
got_segment |= 2;
|
|
break;
|
|
case DVBSUB_CLUT_SEGMENT:
|
|
ret = dvbsub_parse_clut_segment(avctx, p, segment_length);
|
|
if (ret < 0) goto end;
|
|
got_segment |= 4;
|
|
break;
|
|
case DVBSUB_OBJECT_SEGMENT:
|
|
ret = dvbsub_parse_object_segment(avctx, p, segment_length);
|
|
got_segment |= 8;
|
|
break;
|
|
case DVBSUB_DISPLAYDEFINITION_SEGMENT:
|
|
ret = dvbsub_parse_display_definition_segment(avctx, p,
|
|
segment_length);
|
|
got_dds = 1;
|
|
break;
|
|
case DVBSUB_DISPLAY_SEGMENT:
|
|
ret = dvbsub_display_end_segment(avctx, p, segment_length, sub, data_size);
|
|
if (got_segment == 15 && !got_dds && !avctx->width && !avctx->height) {
|
|
// Default from ETSI EN 300 743 V1.3.1 (7.2.1)
|
|
avctx->width = 720;
|
|
avctx->height = 576;
|
|
}
|
|
got_segment |= 16;
|
|
break;
|
|
default:
|
|
ff_dlog(avctx, "Subtitling segment type 0x%x, page id %d, length %d\n",
|
|
segment_type, page_id, segment_length);
|
|
break;
|
|
}
|
|
if (ret < 0)
|
|
goto end;
|
|
}
|
|
|
|
p += segment_length;
|
|
}
|
|
// Some streams do not send a display segment but if we have all the other
|
|
// segments then we need no further data.
|
|
if (got_segment == 15) {
|
|
av_log(avctx, AV_LOG_DEBUG, "Missing display_end_segment, emulating\n");
|
|
dvbsub_display_end_segment(avctx, p, 0, sub, data_size);
|
|
}
|
|
|
|
end:
|
|
if(ret < 0) {
|
|
*data_size = 0;
|
|
avsubtitle_free(sub);
|
|
return ret;
|
|
} else {
|
|
if(ctx->compute_edt == 1 )
|
|
FFSWAP(int64_t, ctx->prev_start, sub->pts);
|
|
}
|
|
|
|
return p - buf;
|
|
}
|
|
|
|
#define DS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_SUBTITLE_PARAM
|
|
static const AVOption options[] = {
|
|
{"compute_edt", "compute end of time using pts or timeout", offsetof(DVBSubContext, compute_edt), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DS},
|
|
{"compute_clut", "compute clut when not available(-1) or always(1) or never(0)", offsetof(DVBSubContext, compute_clut), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, DS},
|
|
{"dvb_substream", "", offsetof(DVBSubContext, substream), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 63, DS},
|
|
{NULL}
|
|
};
|
|
static const AVClass dvbsubdec_class = {
|
|
.class_name = "DVB Sub Decoder",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVCodec ff_dvbsub_decoder = {
|
|
.name = "dvbsub",
|
|
.long_name = NULL_IF_CONFIG_SMALL("DVB subtitles"),
|
|
.type = AVMEDIA_TYPE_SUBTITLE,
|
|
.id = AV_CODEC_ID_DVB_SUBTITLE,
|
|
.priv_data_size = sizeof(DVBSubContext),
|
|
.init = dvbsub_init_decoder,
|
|
.close = dvbsub_close_decoder,
|
|
.decode = dvbsub_decode,
|
|
.priv_class = &dvbsubdec_class,
|
|
};
|