/
load_text.c
4262 lines (3777 loc) · 129 KB
/
load_text.c
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/*
* GPAC - Multimedia Framework C SDK
*
* Authors: Jean Le Feuvre
* Copyright (c) Telecom ParisTech 2000-2022
* All rights reserved
*
* This file is part of GPAC / text import filter
*
* GPAC is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* GPAC is distributed in the hope that it will be useful,
* 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
* License along with this library; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <gpac/filters.h>
#include <gpac/constants.h>
#include <gpac/utf.h>
#include <gpac/xml.h>
#include <gpac/token.h>
#include <gpac/color.h>
#include <gpac/internal/media_dev.h>
#include <gpac/internal/isomedia_dev.h>
#ifndef GPAC_DISABLE_SWF_IMPORT
/* SWF Importer */
#include <gpac/internal/swf_dev.h>
#endif
#if !defined(GPAC_DISABLE_ISOM_WRITE) && !defined(GPAC_DISABLE_CORE_TOOLS)
#define TTML_NAMESPACE "http://www.w3.org/ns/ttml"
#define CHECK_STR(__str) \
if (!__str) { \
e = gf_import_message(import, GF_BAD_PARAM, "Invalid XML formatting (line %d)", parser.line); \
goto exit; \
}
typedef struct __txtin_ctx GF_TXTIn;
struct __txtin_ctx
{
//opts
u32 width, height, txtx, txty, fontsize;
s32 zorder;
const char *fontname, *lang, *ttml_zero;
Bool nodefbox, noflush, webvtt, ttml_embed;
u32 timescale;
GF_Fraction fps;
s32 ttml_dur;
GF_FilterPid *ipid, *opid;
char *file_name;
u32 fmt;
u32 playstate;
//0: not seeking, 1: seek request pending, 2: seek configured, discarding packets up until start_range
u32 seek_state;
Double start_range;
Bool is_setup;
GF_Err (*text_process)(GF_Filter *filter, GF_TXTIn *ctx, GF_FilterPacket *ipck);
s32 unicode_type;
FILE *src;
GF_BitStream *bs_w;
Bool first_samp;
Bool hdr_parsed;
Bool unframed;
//state vars for srt
u32 state, default_color;
GF_TextSample *samp;
u64 start, end, prev_end;
u32 curLine;
GF_StyleRecord style;
//WebVTT state
GF_WebVTTParser *vttparser;
//TTXT state
GF_DOMParser *parser;
u32 cur_child_idx, nb_children, last_desc_idx;
GF_List *text_descs;
Bool last_sample_empty;
u64 last_sample_duration;
//TTML state is the same as ttxt plus the timescale and start (webvtt) for cts compute
u32 txml_timescale;
u32 current_tt_interval;
//TTML state
GF_XMLNode *root_working_copy, *body_node;
GF_DOMParser *parser_working_copy;
Bool non_compliant_ttml;
u32 tick_rate, ttml_fps_num, ttml_fps_den, ttml_sfps;
GF_List *ttml_resources;
GF_List *div_nodes_list;
Bool has_images;
#ifndef GPAC_DISABLE_SWF_IMPORT
//SWF text
SWFReader *swf_parse;
Bool do_suspend;
#endif
Bool vtt_to_tx3g;
Bool srt_to_tx3g;
GF_List *intervals;
};
typedef struct
{
u32 size;
u8 *data;
Bool global;
} TTMLRes;
typedef struct
{
s64 begin, end;
GF_List *resources;
} TTMLInterval;
enum
{
GF_TXTIN_MODE_NONE = 0,
GF_TXTIN_MODE_SRT,
GF_TXTIN_MODE_SUB,
GF_TXTIN_MODE_TTXT,
GF_TXTIN_MODE_TEXML,
GF_TXTIN_MODE_WEBVTT,
GF_TXTIN_MODE_TTML,
GF_TXTIN_MODE_SWF_SVG,
GF_TXTIN_MODE_SSA,
};
#define REM_TRAIL_MARKS(__str, __sep) while (1) { \
u32 _len = (u32) strlen(__str); \
if (!_len) break; \
_len--; \
if (strchr(__sep, __str[_len])) __str[_len] = 0; \
else break; \
} \
s32 gf_text_get_utf_type(GF_TXTIn *ctx, FILE *in_src)
{
u32 read;
unsigned char BOM[5];
read = (u32) gf_fread(BOM, 5, in_src);
if ((s32) read < 1)
return -1;
if ((BOM[0]==0xFF) && (BOM[1]==0xFE)) {
/*UTF32 not supported*/
if (!BOM[2] && !BOM[3])
return -1;
gf_fseek(in_src, 2, SEEK_SET);
return 3;
}
if ((BOM[0]==0xFE) && (BOM[1]==0xFF)) {
/*UTF32 not supported*/
if (!BOM[2] && !BOM[3])
return -1;
gf_fseek(in_src, 2, SEEK_SET);
return 2;
} else if ((BOM[0]==0xEF) && (BOM[1]==0xBB) && (BOM[2]==0xBF)) {
gf_fseek(in_src, 3, SEEK_SET);
return 1;
}
if (BOM[0]<0x80) {
gf_fseek(in_src, 0, SEEK_SET);
return 0;
}
const char *opt = gf_opts_get_key("core", "charset");
if (opt) {
if (!stricmp(opt, "utf8") || !stricmp(opt, "utf-8")) return 1;
if (!stricmp(opt, "utf16") || !stricmp(opt, "utf-16")) return 2;
if (!stricmp(opt, "utf16be") || !stricmp(opt, "utf-16be") || !stricmp(opt, "utf-16-be") || !stricmp(opt, "utf16-be")) return 3;
return 0;
}
GF_LOG(GF_LOG_WARNING, GF_LOG_PARSER, ("[TXTIn] Unknown text encoding for PID %s, defaulting to passthrough - use `-charset` to override\n", gf_filter_pid_get_name(ctx->ipid)));
return 0;
}
static void ttxt_dom_progress(void *cbk, u64 cur_samp, u64 count)
{
GF_TXTIn *ctx = (GF_TXTIn *)cbk;
ctx->end = count;
}
static GF_Err gf_text_guess_format(GF_TXTIn *ctx, const char *filename, u32 *fmt)
{
char szLine[2048];
u32 val;
s32 uni_type;
FILE *test = gf_fopen(filename, "rb");
if (!test) return GF_URL_ERROR;
uni_type = gf_text_get_utf_type(ctx, test);
if (uni_type>1) {
const u16 *sptr;
char szUTF[1024];
u32 read = (u32) gf_fread(szUTF, 1023, test);
if ((s32) read < 0) {
gf_fclose(test);
return GF_IO_ERR;
}
szUTF[read]=0;
sptr = (u16*)szUTF;
/*read = (u32) */gf_utf8_wcstombs(szLine, read, &sptr);
} else {
val = (u32) gf_fread(szLine, 1024, test);
if ((s32) val<0) return GF_IO_ERR;
szLine[val]=0;
}
REM_TRAIL_MARKS(szLine, "\r\n\t ")
*fmt = GF_TXTIN_MODE_NONE;
if ((szLine[0]=='{') && strstr(szLine, "}{")) *fmt = GF_TXTIN_MODE_SUB;
else if (szLine[0] == '<') {
char *ext = gf_file_ext_start(filename);
if (ext && !strnicmp(ext, ".ttxt", 5)) *fmt = GF_TXTIN_MODE_TTXT;
else if (ext && !strnicmp(ext, ".ttml", 5)) *fmt = GF_TXTIN_MODE_TTML;
ext = strstr(szLine, "?>");
if (ext) ext += 2;
if (ext && !ext[0]) {
if (!gf_fgets(szLine, 2048, test))
szLine[0] = '\0';
}
if (strstr(szLine, "x-quicktime-tx3g") || strstr(szLine, "text3GTrack")) *fmt = GF_TXTIN_MODE_TEXML;
else if (strstr(szLine, "TextStream")) *fmt = GF_TXTIN_MODE_TTXT;
else if (strstr(szLine, "tt")) *fmt = GF_TXTIN_MODE_TTML;
}
else if (strstr(szLine, "WEBVTT") )
*fmt = GF_TXTIN_MODE_WEBVTT;
else if (strstr(szLine, " --> ") )
*fmt = GF_TXTIN_MODE_SRT; /* might want to change the default to WebVTT */
else if (!strncmp(szLine, "FWS", 3) || !strncmp(szLine, "CWS", 3))
*fmt = GF_TXTIN_MODE_SWF_SVG;
else if (!strncmp(szLine, "[Script Info]", 13) )
*fmt = GF_TXTIN_MODE_SSA;
gf_fclose(test);
return GF_OK;
}
char *gf_text_get_utf8_line(char *szLine, u32 lineSize, FILE *txt_in, s32 unicode_type)
{
u32 i, j, len;
char *sOK;
char szLineConv[2048];
unsigned short *sptr;
memset(szLine, 0, sizeof(char)*lineSize);
sOK = gf_fgets(szLine, lineSize, txt_in);
if (!sOK) return NULL;
if (unicode_type<=1) {
j=0;
len = (u32) strlen(szLine);
for (i=0; i<len; i++) {
if (!unicode_type && (szLine[i] & 0x80)) {
/*non UTF8 (likely some win-CP)*/
if ((szLine[i+1] & 0xc0) != 0x80) {
szLineConv[j] = 0xc0 | ( (szLine[i] >> 6) & 0x3 );
j++;
szLine[i] &= 0xbf;
}
/*UTF8 2 bytes char*/
else if ( (szLine[i] & 0xe0) == 0xc0) {
szLineConv[j] = szLine[i];
i++;
j++;
}
/*UTF8 3 bytes char*/
else if ( (szLine[i] & 0xf0) == 0xe0) {
szLineConv[j] = szLine[i];
i++;
j++;
szLineConv[j] = szLine[i];
i++;
j++;
}
/*UTF8 4 bytes char*/
else if ( (szLine[i] & 0xf8) == 0xf0) {
szLineConv[j] = szLine[i];
i++;
j++;
szLineConv[j] = szLine[i];
i++;
j++;
szLineConv[j] = szLine[i];
i++;
j++;
} else {
i+=1;
continue;
}
}
szLineConv[j] = szLine[i];
j++;
}
szLineConv[j] = 0;
strcpy(szLine, szLineConv);
return sOK;
}
#ifdef GPAC_BIG_ENDIAN
if (unicode_type==3)
#else
if (unicode_type==2)
#endif
{
i=0;
while (1) {
char c;
if (!szLine[i] && !szLine[i+1]) break;
c = szLine[i+1];
szLine[i+1] = szLine[i];
szLine[i] = c;
i+=2;
}
}
sptr = (u16 *)szLine;
i = gf_utf8_wcstombs(szLineConv, 2048, (const unsigned short **) &sptr);
if (i == GF_UTF8_FAIL) i = 0;
szLineConv[i] = 0;
strcpy(szLine, szLineConv);
/*this is ugly indeed: since input is UTF16-LE, there are many chances the gf_fgets never reads the \0 after a \n*/
if (unicode_type==3) gf_fgetc(txt_in);
return sOK;
}
static void txtin_probe_duration(GF_TXTIn *ctx)
{
GF_Fraction64 dur;
dur.num = 0;
if (ctx->fmt == GF_TXTIN_MODE_SWF_SVG) {
#ifndef GPAC_DISABLE_SWF_IMPORT
u32 frame_count, frame_rate;
gf_swf_get_duration(ctx->swf_parse, &frame_rate, &frame_count);
if (frame_count) {
GF_Fraction64 tdur;
tdur.num = frame_count;
tdur.den = frame_rate;
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_DURATION, &PROP_FRAC64(tdur));
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_PLAYBACK_MODE, &PROP_UINT(GF_PLAYBACK_MODE_FASTFORWARD ) );
}
#endif
return;
}
if ((ctx->fmt == GF_TXTIN_MODE_SRT) || (ctx->fmt == GF_TXTIN_MODE_WEBVTT) || (ctx->fmt == GF_TXTIN_MODE_SUB) || (ctx->fmt == GF_TXTIN_MODE_SSA)) {
u64 pos = gf_ftell(ctx->src);
gf_fseek(ctx->src, 0, SEEK_SET);
while (!gf_feof(ctx->src)) {
u64 end;
char szLine[2048];
char *sOK = gf_text_get_utf8_line(szLine, 2048, ctx->src, ctx->unicode_type);
if (!sOK) break;
REM_TRAIL_MARKS(szLine, "\r\n\t ")
if (ctx->fmt == GF_TXTIN_MODE_SUB) {
char szText[2048];
u32 sframe, eframe;
if (sscanf(szLine, "{%d}{%d}%2047s", &sframe, &eframe, szText) == 3) {
if (ctx->fps.den)
end = 1000 * eframe * ctx->fps.num / ctx->fps.den;
else
end = 1000 * eframe / 25;
if (end > (u64) dur.num) dur.num = (s64) end;
}
} else if (ctx->fmt == GF_TXTIN_MODE_SSA) {
if (strncmp(szLine, "Dialogue: ", 10)) continue;
char *start_p = strchr(szLine+10, ',');
if (!start_p) continue;
char *end_p = strchr(start_p+1, ',');
if (!end_p) continue;
end_p[0] = 0;
end_p +=1;
start_p = strchr(end_p, ',');
if (start_p) start_p[0] = 0;
u32 eh, em, es, ems;
if (sscanf(end_p, "%u:%u:%u.%u", &eh, &em, &es, &ems) != 4) {
eh = 0;
if (sscanf(end_p, "%u:%u.%u", &em, &es, &ems) != 3) {
continue;
}
}
end = (3600*eh + 60*em + es)*1000 + ems;
if (end > (u64) dur.num) dur.num = (s64) end;
} else {
u32 eh, em, es, ems;
char *start = strstr(szLine, "-->");
if (!start) continue;
while (start[0] && ((start[0] == ' ') || (start[0] == '\t'))) start++;
if (sscanf(start, "%u:%u:%u,%u", &eh, &em, &es, &ems) != 4) {
eh = 0;
if (sscanf(szLine, "%u:%u,%u", &em, &es, &ems) != 3) {
continue;
}
}
end = (3600*eh + 60*em + es)*1000 + ems;
if (end > (u64) dur.num) dur.num = (s64) end;
}
}
gf_fseek(ctx->src, pos, SEEK_SET);
if (dur.num) {
dur.den = 1000;
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_DURATION, &PROP_FRAC64(dur));
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_PLAYBACK_MODE, &PROP_UINT(GF_PLAYBACK_MODE_FASTFORWARD ) );
}
return;
}
if ((ctx->fmt == GF_TXTIN_MODE_TTXT) || (ctx->fmt == GF_TXTIN_MODE_TEXML)) {
u32 i=0;
GF_XMLNode *node, *root = gf_xml_dom_get_root(ctx->parser);
while ((node = gf_list_enum(root->content, &i))) {
u32 j;
u64 duration;
GF_XMLAttribute *att;
if (node->type) {
continue;
}
/*sample text*/
if ((ctx->fmt == GF_TXTIN_MODE_TTXT) && strcmp(node->name, "TextSample")) continue;
else if ((ctx->fmt == GF_TXTIN_MODE_TEXML) && strcmp(node->name, "sample")) continue;
j=0;
while ( (att=(GF_XMLAttribute*)gf_list_enum(node->attributes, &j))) {
u32 h, m, s, ms;
u64 ts=0;
if (ctx->fmt == GF_TXTIN_MODE_TTXT) {
if (strcmp(att->name, "sampleTime")) continue;
if (sscanf(att->value, "%u:%u:%u.%u", &h, &m, &s, &ms) == 4) {
ts = (h*3600 + m*60 + s)*1000 + ms;
} else {
ts = (u32) (atof(att->value) * 1000);
}
if (ts > (u64) dur.num) dur.num = (s64) ts;
} else {
if (strcmp(att->name, "duration")) continue;
duration = atoi(att->value);
dur.num += (s32) ( (1000 * duration) / ctx->txml_timescale);
}
}
}
if (dur.num) {
dur.den = 1000;
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_DURATION, &PROP_FRAC64(dur));
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_PLAYBACK_MODE, &PROP_UINT(GF_PLAYBACK_MODE_FASTFORWARD ) );
}
return;
}
if (ctx->fmt == GF_TXTIN_MODE_TTML) {
u32 i=0, k=0;
GF_XMLNode *div_node;
while ((div_node = gf_list_enum(ctx->div_nodes_list, &k))) {
GF_XMLNode *node;
while ((node = gf_list_enum(div_node->content, &i))) {
GF_XMLNode *p_node;
GF_XMLAttribute *att;
u32 h, m, s, ms, p_idx=0;
u64 ts_end=0;
h = m = s = ms = 0;
while ( (att = (GF_XMLAttribute*)gf_list_enum(node->attributes, &p_idx))) {
if (strcmp(att->name, "end")) continue;
if (sscanf(att->value, "%u:%u:%u.%u", &h, &m, &s, &ms) == 4) {
ts_end = (h*3600 + m*60+s)*1000+ms;
} else if (sscanf(att->value, "%u:%u:%u", &h, &m, &s) == 3) {
ts_end = (h*3600 + m*60+s)*1000;
}
}
//or under a <span>
p_idx = 0;
while ( (p_node = (GF_XMLNode*)gf_list_enum(node->content, &p_idx))) {
u32 span_idx = 0;
while ( (att = (GF_XMLAttribute*)gf_list_enum(p_node->attributes, &span_idx))) {
if (strcmp(att->name, "end")) continue;
if (sscanf(att->value, "%u:%u:%u.%u", &h, &m, &s, &ms) == 4) {
ts_end = (h*3600 + m*60+s)*1000+ms;
} else if (sscanf(att->value, "%u:%u:%u", &h, &m, &s) == 3) {
ts_end = (h*3600 + m*60+s)*1000;
}
}
}
if (ts_end > (u64) dur.num) dur.num = (s64) ts_end;
}
}
if (dur.num) {
dur.den = 1000;
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_DURATION, &PROP_FRAC64(dur));
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_PLAYBACK_MODE, &PROP_UINT(GF_PLAYBACK_MODE_FASTFORWARD ) );
}
return;
}
GF_LOG(GF_LOG_WARNING, GF_LOG_PARSER, ("[TXTIn] Duration probing not supported for format %d\n", ctx->fmt));
}
static GF_Err txtin_setup_srt(GF_Filter *filter, GF_TXTIn *ctx)
{
u32 ID, OCR_ES_ID, dsi_len, file_size;
u8 *dsi;
GF_TextSampleDescriptor *sd;
if (!ctx->unframed)
ctx->src = gf_fopen(ctx->file_name, "rb");
if (!ctx->src) return GF_URL_ERROR;
file_size = (u32) gf_fsize(ctx->src);
ctx->unicode_type = gf_text_get_utf_type(ctx, ctx->src);
if (ctx->unicode_type<0) {
gf_fclose(ctx->src);
ctx->src = NULL;
GF_LOG(GF_LOG_ERROR, GF_LOG_PARSER, ("[TXTIn] Unsupported SRT UTF encoding\n"));
return GF_NOT_SUPPORTED;
}
if (!ctx->timescale) ctx->timescale = 1000;
OCR_ES_ID = ID = 0;
if (!ctx->unframed) {
if (!ctx->opid) ctx->opid = gf_filter_pid_new(filter);
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_STREAM_TYPE, &PROP_UINT(GF_STREAM_TEXT) );
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_CODECID, &PROP_UINT(GF_CODECID_TX3G) );
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_TIMESCALE, &PROP_UINT(ctx->timescale) );
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_DOWN_SIZE, &PROP_LONGUINT(file_size) );
if (!ID) ID = 1;
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_ID, &PROP_UINT(ID) );
if (OCR_ES_ID) gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_CLOCK_ID, &PROP_UINT(OCR_ES_ID) );
}
if (ctx->width) gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_WIDTH, &PROP_UINT(ctx->width) );
if (ctx->height) gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_HEIGHT, &PROP_UINT(ctx->height) );
if (ctx->zorder) gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_ZORDER, &PROP_SINT(ctx->zorder) );
if (ctx->lang) gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_LANGUAGE, &PROP_STRING( ctx->lang) );
sd = (GF_TextSampleDescriptor*)gf_odf_desc_new(GF_ODF_TX3G_TAG);
sd->fonts = (GF_FontRecord*)gf_malloc(sizeof(GF_FontRecord));
sd->font_count = 1;
sd->fonts[0].fontID = 1;
sd->fonts[0].fontName = gf_strdup(ctx->fontname ? ctx->fontname : "Serif");
sd->back_color = 0x00000000; /*transparent*/
sd->default_style.fontID = 1;
sd->default_style.font_size = ctx->fontsize;
sd->default_style.text_color = 0xFFFFFFFF; /*white*/
sd->default_style.style_flags = 0;
sd->horiz_justif = 1; /*center of scene*/
sd->vert_justif = (s8) -1; /*bottom of scene*/
if (ctx->nodefbox) {
sd->default_pos.top = sd->default_pos.left = sd->default_pos.right = sd->default_pos.bottom = 0;
} else if ((sd->default_pos.bottom==sd->default_pos.top) || (sd->default_pos.right==sd->default_pos.left)) {
sd->default_pos.left = ctx->txtx;
sd->default_pos.top = ctx->txty;
sd->default_pos.right = ctx->width + sd->default_pos.left;
sd->default_pos.bottom = ctx->height + sd->default_pos.top;
}
/*store attribs*/
ctx->style = sd->default_style;
gf_odf_tx3g_write(sd, &dsi, &dsi_len);
gf_filter_pid_set_property(ctx->opid, GF_PROP_PID_DECODER_CONFIG, &PROP_DATA_NO_COPY(dsi, dsi_len) );
gf_odf_desc_del((GF_Descriptor *)sd);
ctx->default_color = ctx->style.text_color;
ctx->first_samp = GF_TRUE;
ctx->samp = gf_isom_new_text_sample();
ctx->prev_end = 0;
if (!ctx->unframed) {
ctx->state = 0;
ctx->end = ctx->start = 0;
ctx->curLine = 0;
txtin_probe_duration(ctx);
}
return GF_OK;
}
static void txtin_process_send_text_sample(GF_TXTIn *ctx, GF_TextSample *txt_samp, u64 ts, u32 duration, Bool is_rap)
{
GF_FilterPacket *dst_pck;
u8 *pck_data;
u32 size;
if (ctx->seek_state==2) {
Double end = (Double) (ts+duration);
end /= 1000;
if (end < ctx->start_range) return;
ctx->seek_state = 0;
}
size = gf_isom_text_sample_size(txt_samp);
dst_pck = gf_filter_pck_new_alloc(ctx->opid, size, &pck_data);
if (!dst_pck) return;
gf_bs_reassign_buffer(ctx->bs_w, pck_data, size);
gf_isom_text_sample_write_bs(txt_samp, ctx->bs_w);
ts = gf_timestamp_rescale(ts, 1000, ctx->timescale);
duration = (u32) gf_timestamp_rescale(duration, 1000, ctx->timescale);
gf_filter_pck_set_sap(dst_pck, is_rap ? GF_FILTER_SAP_1 : GF_FILTER_SAP_NONE);
gf_filter_pck_set_cts(dst_pck, ts);
gf_filter_pck_set_duration(dst_pck, duration);
gf_filter_pck_send(dst_pck);
}
static GF_Err parse_srt_line(GF_TXTIn *ctx, char *szLine, u32 *char_l, Bool *set_start_c, Bool *set_end_c)
{
u32 i, char_line, j, rem_styles, len;
Bool rem_color;
char *ptr = szLine;
unsigned short uniLine[5000], uniText[5000], *sptr;
char szText[2048];
len = gf_utf8_mbstowcs(uniLine, 5000, (const char **) &ptr);
if (len == GF_UTF8_FAIL) {
GF_LOG(GF_LOG_WARNING, GF_LOG_PARSER, ("[TXTIn] Invalid UTF data (line %d)\n", ctx->curLine));
ctx->state = 0;
len = 0;
return GF_NON_COMPLIANT_BITSTREAM;
}
i=j=0;
rem_styles = 0;
rem_color = 0;
while (i<len) {
u32 font_style = 0;
u32 style_nb_chars = 0;
u32 style_def_type = 0;
if ( (uniLine[i]=='<') && (uniLine[i+2]=='>')) {
style_nb_chars = 3;
style_def_type = 1;
}
else if ( (uniLine[i]=='<') && (uniLine[i+1]=='/') && (uniLine[i+3]=='>')) {
style_def_type = 2;
style_nb_chars = 4;
}
else if (uniLine[i]=='<') {
const unsigned short* src = uniLine + i;
u32 alen = gf_utf8_wcstombs(szLine, 2048, (const unsigned short**) & src);
if (alen == GF_UTF8_FAIL) alen = 0;
szLine[alen] = 0;
strlwr(szLine);
if (!strncmp(szLine, "<font ", 6) ) {
char *a_sep = strstr(szLine, "color");
if (a_sep) a_sep = strchr(a_sep, '"');
if (a_sep) {
char *e_sep = strchr(a_sep+1, '"');
if (e_sep) {
e_sep[0] = 0;
font_style = gf_color_parse(a_sep+1);
e_sep[0] = '"';
e_sep = strchr(e_sep+1, '>');
if (e_sep) {
style_nb_chars = (u32) (1 + e_sep - szLine);
style_def_type = 1;
}
}
}
}
else if (!strncmp(szLine, "</font>", 7) ) {
style_nb_chars = 7;
style_def_type = 2;
font_style = 0xFFFFFFFF;
}
else if (!strncmp(szLine, "<strike>", 8) ) {
style_nb_chars = 8;
style_def_type = 1;
}
else if (!strncmp(szLine, "</strike>", 9) ) {
style_nb_chars = 9;
style_def_type = 2;
font_style = 0xFFFFFFFF;
}
//skip unknown
else {
char *a_sep = strstr(szLine, ">");
if (a_sep) {
style_nb_chars = (u32) (1 + a_sep - szLine);
i += style_nb_chars;
continue;
}
}
}
/*start of new style*/
if (style_def_type==1) {
/*store prev style*/
if (*set_end_c) {
assert(*set_start_c);
gf_isom_text_add_style(ctx->samp, &ctx->style);
*set_end_c = *set_start_c = GF_FALSE;
ctx->style.style_flags &= ~rem_styles;
rem_styles = 0;
if (rem_color) {
ctx->style.text_color = ctx->default_color;
rem_color = 0;
}
}
if (*set_start_c && (ctx->style.startCharOffset != j)) {
ctx->style.endCharOffset = *char_l + j;
if (ctx->style.style_flags) gf_isom_text_add_style(ctx->samp, &ctx->style);
}
switch (uniLine[i+1]) {
case 'b':
case 'B':
ctx->style.style_flags |= GF_TXT_STYLE_BOLD;
*set_start_c = GF_TRUE;
ctx->style.startCharOffset = *char_l + j;
break;
case 'i':
case 'I':
ctx->style.style_flags |= GF_TXT_STYLE_ITALIC;
*set_start_c = GF_TRUE;
ctx->style.startCharOffset = *char_l + j;
break;
case 'u':
case 'U':
ctx->style.style_flags |= GF_TXT_STYLE_UNDERLINED;
*set_start_c = GF_TRUE;
ctx->style.startCharOffset = *char_l + j;
break;
case 's':
case 'S':
ctx->style.style_flags |= GF_TXT_STYLE_STRIKETHROUGH;
*set_start_c = GF_TRUE;
ctx->style.startCharOffset = *char_l + j;
break;
case 'f':
case 'F':
if (font_style) {
ctx->style.text_color = font_style;
*set_start_c = GF_TRUE;
ctx->style.startCharOffset = *char_l + j;
}
break;
}
i += style_nb_chars;
continue;
}
/*end of prev style*/
if (style_def_type==2) {
switch (uniLine[i+2]) {
case 'b':
case 'B':
rem_styles |= GF_TXT_STYLE_BOLD;
*set_end_c = GF_TRUE;
ctx->style.endCharOffset = *char_l + j;
break;
case 'i':
case 'I':
rem_styles |= GF_TXT_STYLE_ITALIC;
*set_end_c = GF_TRUE;
ctx->style.endCharOffset = *char_l + j;
break;
case 'u':
case 'U':
rem_styles |= GF_TXT_STYLE_UNDERLINED;
*set_end_c = GF_TRUE;
ctx->style.endCharOffset = *char_l + j;
break;
case 's':
case 'S':
rem_styles |= GF_TXT_STYLE_STRIKETHROUGH;
*set_end_c = GF_TRUE;
ctx->style.endCharOffset = *char_l + j;
break;
case 'f':
case 'F':
if (font_style) {
rem_color = 1;
*set_end_c = GF_TRUE;
ctx->style.endCharOffset = *char_l + j;
}
}
i+=style_nb_chars;
continue;
}
/*store style*/
if (*set_end_c) {
gf_isom_text_add_style(ctx->samp, &ctx->style);
*set_end_c = GF_FALSE;
*set_start_c = GF_TRUE;
ctx->style.startCharOffset = *char_l + j;
ctx->style.style_flags &= ~rem_styles;
rem_styles = 0;
ctx->style.text_color = ctx->default_color;
rem_color = 0;
}
uniText[j] = uniLine[i];
j++;
i++;
}
/*store last style*/
if (*set_end_c) {
gf_isom_text_add_style(ctx->samp, &ctx->style);
*set_end_c = GF_FALSE;
*set_start_c = GF_TRUE;
ctx->style.startCharOffset = *char_l + j;
ctx->style.style_flags &= ~rem_styles;
}
char_line = j;
uniText[j] = 0;
sptr = (u16 *) uniText;
len = gf_utf8_wcstombs(szText, 5000, (const u16 **) &sptr);
if (len == GF_UTF8_FAIL) len = 0;
gf_isom_text_add_text(ctx->samp, szText, len);
*char_l += char_line;
return GF_OK;
}
static GF_Err txtin_process_srt(GF_Filter *filter, GF_TXTIn *ctx, GF_FilterPacket *ipck)
{
u32 sh, sm, ss, sms, eh, em, es, ems, txt_line, char_len;
Bool set_start_char, set_end_char;
u32 line;
char szLine[2048], *ptr;
if (!ctx->is_setup) {
ctx->is_setup = GF_TRUE;
GF_Err e = txtin_setup_srt(filter, ctx);
if (e || !ctx->unframed) return e;
}
if (!ctx->opid) return GF_NOT_SUPPORTED;
if (!ctx->unframed) {
if (!ctx->playstate) return GF_OK;
else if (ctx->playstate==2) return GF_EOS;
}
txt_line = 0;
set_start_char = set_end_char = GF_FALSE;
char_len = 0;
if (ctx->seek_state == 1) {
ctx->seek_state = 2;
gf_fseek(ctx->src, 0, SEEK_SET);
}
while (1) {
Bool is_empty = GF_FALSE;
char *sOK = gf_text_get_utf8_line(szLine, 2048, ctx->src, ctx->unicode_type);
if (sOK) {
REM_TRAIL_MARKS(szLine, "\r\n\t ")
if (ctx->unicode_type<=1) is_empty = strlen(szLine) ? GF_FALSE : GF_TRUE;
else is_empty = (!szLine[0] && !szLine[1]) ? GF_TRUE : GF_FALSE;
}
if (!sOK || is_empty) {
u32 utf_inc = (ctx->unicode_type<=1) ? 1 : 2;
u32 nb_empty = utf_inc;
u32 pos = (u32) gf_ftell(ctx->src);
if (ctx->state) {
while (!gf_feof(ctx->src)) {
sOK = gf_text_get_utf8_line(szLine+nb_empty, 2048-nb_empty, ctx->src, ctx->unicode_type);
if (sOK) REM_TRAIL_MARKS((szLine+nb_empty), "\r\n\t ")
if (!sOK) {
gf_fseek(ctx->src, pos, SEEK_SET);
break;
} else if (!strlen(szLine+nb_empty)) {
nb_empty+=utf_inc;
continue;
} else if ( sscanf(szLine+nb_empty, "%u", &line) == 1) {
gf_fseek(ctx->src, pos, SEEK_SET);
break;
} else {
u32 k;
for (k=0; k<nb_empty; k++) szLine[k] = '\n';
goto force_line;
}
}
}
ctx->style.style_flags = 0;
ctx->style.text_color = 0xFFFFFFFF;
ctx->style.startCharOffset = ctx->style.endCharOffset = 0;
if (txt_line) {
if (ctx->prev_end && (ctx->start != ctx->prev_end) && (ctx->state<=2)) {
GF_TextSample * empty_samp = gf_isom_new_text_sample();
txtin_process_send_text_sample(ctx, empty_samp, ctx->prev_end, (u32) (ctx->start - ctx->prev_end), GF_TRUE );
gf_isom_delete_text_sample(empty_samp);
}
if (ctx->state<=2) {
txtin_process_send_text_sample(ctx, ctx->samp, ctx->start, (u32) (ctx->end - ctx->start), GF_TRUE);
ctx->prev_end = ctx->end;
}
txt_line = 0;
char_len = 0;
set_start_char = set_end_char = GF_FALSE;
ctx->style.startCharOffset = ctx->style.endCharOffset = 0;
gf_isom_text_reset(ctx->samp);
if (!ctx->unframed)
gf_filter_pid_set_info(ctx->opid, GF_PROP_PID_DOWN_BYTES, &PROP_LONGUINT( gf_ftell(ctx->src )) );
}
ctx->state = 0;
if (!sOK) break;
continue;
}
force_line:
switch (ctx->state) {
case 0:
if (sscanf(szLine, "%u", &line) != 1) {
GF_LOG(GF_LOG_ERROR, GF_LOG_PARSER, ("[TXTIn] Bad SRT formatting - expecting number got \"%s\"\n", szLine));
break;
}
if (line != ctx->curLine + 1) {
GF_LOG(GF_LOG_WARNING, GF_LOG_PARSER, ("[TXTIn] Corrupted SRT frame %d after frame %d\n", line, ctx->curLine));
}
ctx->curLine = line;
ctx->state = 1;
break;
case 1:
if (sscanf(szLine, "%u:%u:%u,%u --> %u:%u:%u,%u", &sh, &sm, &ss, &sms, &eh, &em, &es, &ems) != 8) {
if (sscanf(szLine, "%u:%u:%u.%u --> %u:%u:%u.%u", &sh, &sm, &ss, &sms, &eh, &em, &es, &ems) != 8) {
sh = eh = 0;
if (sscanf(szLine, "%u:%u,%u --> %u:%u,%u", &sm, &ss, &sms, &em, &es, &ems) != 6) {
if (sscanf(szLine, "%u:%u.%u --> %u:%u.%u", &sm, &ss, &sms, &em, &es, &ems) != 6) {
GF_LOG(GF_LOG_WARNING, GF_LOG_PARSER, ("[TXTIn] Error scanning SRT frame %d timing\n", ctx->curLine));
ctx->state = 0;
break;
}
}
}
}
ctx->start = (3600*sh + 60*sm + ss)*1000 + sms;
if (ctx->start < ctx->end) {
GF_LOG(GF_LOG_WARNING, GF_LOG_PARSER, ("[TXTIn] Overlapping SRT frame %d - starts "LLD" ms is before end of previous one "LLD" ms - adjusting time stamps\n", ctx->curLine, ctx->start, ctx->end));
ctx->start = ctx->end;
}
ctx->end = (3600*eh + 60*em + es)*1000 + ems;
/*make stream start at 0 by inserting a fake AU*/
if (ctx->first_samp && (ctx->start > 0)) {
txtin_process_send_text_sample(ctx, ctx->samp, 0, (u32) ctx->start, GF_TRUE);
}
ctx->style.style_flags = 0;
ctx->state = 2;
if (ctx->end <= ctx->prev_end) {
GF_LOG(GF_LOG_WARNING, GF_LOG_PARSER, ("[TXTIn] Overlapping SRT frame %d end "LLD" is at or before previous end "LLD" - removing\n", ctx->curLine, ctx->end, ctx->prev_end));
ctx->start = ctx->end;
ctx->state = 3;
}
break;
default: