tx3g.c

一个用于智能手机的多媒体库适合S60 WinCE的跨平台开发库

/*
 *			GPAC - Multimedia Framework C SDK
 *
 *			Copyright (c) Jean Le Feuvre 2000-2005 
 *					All rights reserved
 *
 *  This file is part of GPAC / ISO Media File Format sub-project
 *
 *  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/internal/isomedia_dev.h>
#include <gpac/constants.h>


#ifndef GPAC_READ_ONLY

GF_Err gf_isom_update_text_description(GF_ISOFile *movie, u32 trackNumber, u32 descriptionIndex, GF_TextSampleDescriptor *desc)
{
	GF_TrackBox *trak;
	GF_Err e;
	u32 i;
	GF_TextSampleEntryBox *txt;

	if (!descriptionIndex || !desc) return GF_BAD_PARAM;
	e = CanAccessMovie(movie, GF_ISOM_OPEN_WRITE);
	if (e) return e;
	
	trak = gf_isom_get_track_from_file(movie, trackNumber);
	if (!trak || !trak->Media || !desc->font_count) return GF_BAD_PARAM;

	if (trak->Media->handler->handlerType != GF_ISOM_MEDIA_TEXT) return GF_BAD_PARAM;

	txt = (GF_TextSampleEntryBox*)gf_list_get(trak->Media->information->sampleTable->SampleDescription->boxList, descriptionIndex - 1);
	if (!txt) return GF_BAD_PARAM;
	if (txt->type != GF_ISOM_BOX_TYPE_TX3G) return GF_BAD_PARAM;

	trak->Media->mediaHeader->modificationTime = gf_isom_get_mp4time();

	txt->back_color = desc->back_color; 
	txt->default_box = desc->default_pos;
	txt->default_style = desc->default_style;
	txt->displayFlags = desc->displayFlags;
	txt->vertical_justification = desc->vert_justif;
	txt->horizontal_justification = desc->horiz_justif;
	if (txt->font_table) gf_isom_box_del((GF_Box*)txt->font_table);

	txt->font_table = (GF_FontTableBox *)gf_isom_box_new(GF_ISOM_BOX_TYPE_FTAB);
	txt->font_table->entry_count = desc->font_count;
	txt->font_table->fonts = (GF_FontRecord *) malloc(sizeof(GF_FontRecord) * desc->font_count);
	for (i=0; i<desc->font_count; i++) {
		txt->font_table->fonts[i].fontID = desc->fonts[i].fontID;
		if (desc->fonts[i].fontName) txt->font_table->fonts[i].fontName = strdup(desc->fonts[i].fontName);
	}
	return e;
}

GF_Err gf_isom_new_text_description(GF_ISOFile *movie, u32 trackNumber, GF_TextSampleDescriptor *desc, char *URLname, char *URNname, u32 *outDescriptionIndex)
{
	GF_TrackBox *trak;
	GF_Err e;
	u32 dataRefIndex, i;
	GF_TextSampleEntryBox *txt;

	e = CanAccessMovie(movie, GF_ISOM_OPEN_WRITE);
	if (e) return e;
	
	trak = gf_isom_get_track_from_file(movie, trackNumber);
	if (!trak || !trak->Media || !desc->font_count) return GF_BAD_PARAM;

	if (trak->Media->handler->handlerType != GF_ISOM_MEDIA_TEXT) return GF_BAD_PARAM;

	//get or create the data ref
	e = Media_FindDataRef(trak->Media->information->dataInformation->dref, URLname, URNname, &dataRefIndex);
	if (e) return e;
	if (!dataRefIndex) {
		e = Media_CreateDataRef(trak->Media->information->dataInformation->dref, URLname, URNname, &dataRefIndex);
		if (e) return e;
	}
	trak->Media->mediaHeader->modificationTime = gf_isom_get_mp4time();

	txt = (GF_TextSampleEntryBox *) gf_isom_box_new(GF_ISOM_BOX_TYPE_TX3G);
	txt->dataReferenceIndex = dataRefIndex;
	gf_list_add(trak->Media->information->sampleTable->SampleDescription->boxList, txt);
	if (outDescriptionIndex) *outDescriptionIndex = gf_list_count(trak->Media->information->sampleTable->SampleDescription->boxList);

	txt->back_color = desc->back_color; 
	txt->default_box = desc->default_pos;
	txt->default_style = desc->default_style;
	txt->displayFlags = desc->displayFlags;
	txt->vertical_justification = desc->vert_justif;
	txt->horizontal_justification = desc->horiz_justif;
	txt->font_table = (GF_FontTableBox *)gf_isom_box_new(GF_ISOM_BOX_TYPE_FTAB);
	txt->font_table->entry_count = desc->font_count;

	txt->font_table->fonts = (GF_FontRecord *) malloc(sizeof(GF_FontRecord) * desc->font_count);
	for (i=0; i<desc->font_count; i++) {
		txt->font_table->fonts[i].fontID = desc->fonts[i].fontID;
		if (desc->fonts[i].fontName) txt->font_table->fonts[i].fontName = strdup(desc->fonts[i].fontName);
	}
	return e;
}


/*blindly adds text - note we don't rely on terminaison characters to handle utf8 and utf16 data 
in the same way. It is the user responsability to signal UTF16*/
GF_Err gf_isom_text_add_text(GF_TextSample *samp, char *text_data, u32 text_len)
{
	if (!samp) return GF_BAD_PARAM;
	if (!text_len) return GF_OK;
	samp->text = (char*)realloc(samp->text, sizeof(char) * (samp->len + text_len) );
	memcpy(samp->text + samp->len, text_data, sizeof(char) * text_len);
	samp->len += text_len;
	return GF_OK;
}

GF_Err gf_isom_text_set_utf16_marker(GF_TextSample *samp)
{
	/*we MUST have an empty sample*/
	if (!samp || samp->text) return GF_BAD_PARAM;
	samp->text = (char*)malloc(sizeof(char) * 2);
	samp->text[0] = (char) 0xFE;
	samp->text[1] = (char) 0xFF;
	samp->len = 2;
	return GF_OK;
}

GF_Err gf_isom_text_add_style(GF_TextSample *samp, GF_StyleRecord *rec)
{
	if (!samp || !rec) return GF_BAD_PARAM;

	if (!samp->styles) {
		samp->styles = (GF_TextStyleBox *) gf_isom_box_new(GF_ISOM_BOX_TYPE_STYL);
		if (!samp->styles) return GF_OUT_OF_MEM;
	}
	samp->styles->styles = (GF_StyleRecord*)realloc(samp->styles->styles, sizeof(GF_StyleRecord)*(samp->styles->entry_count+1));
	if (!samp->styles->styles) return GF_OUT_OF_MEM;
	samp->styles->styles[samp->styles->entry_count] = *rec;
	samp->styles->entry_count++;
	return GF_OK;
}

GF_Err gf_isom_text_add_highlight(GF_TextSample *samp, u16 start_char, u16 end_char)
{
	GF_TextHighlightBox *a;
	if (!samp) return GF_BAD_PARAM;
	if (start_char == end_char) return GF_BAD_PARAM;

	a = (GF_TextHighlightBox *) gf_isom_box_new(GF_ISOM_BOX_TYPE_HLIT);
	if (!a) return GF_OUT_OF_MEM;
	a->startcharoffset = start_char;
	a->endcharoffset = end_char;
	return gf_list_add(samp->others, a);
}

GF_Err gf_isom_text_set_highlight_color(GF_TextSample *samp, u8 r, u8 g, u8 b, u8 a)
{
	if (!samp) return GF_BAD_PARAM;

	if (!samp->highlight_color) {
		samp->highlight_color = (GF_TextHighlightColorBox *) gf_isom_box_new(GF_ISOM_BOX_TYPE_HCLR);
		if (!samp->highlight_color) return GF_OUT_OF_MEM;
	}
	samp->highlight_color->hil_color = a; samp->highlight_color->hil_color <<= 8;
	samp->highlight_color->hil_color = r; samp->highlight_color->hil_color <<= 8;
	samp->highlight_color->hil_color = g; samp->highlight_color->hil_color <<= 8;
	samp->highlight_color->hil_color = b;
	return GF_OK;
}

GF_Err gf_isom_text_set_highlight_color_argb(GF_TextSample *samp, u32 argb)
{
	if (!samp) return GF_BAD_PARAM;

	if (!samp->highlight_color) {
		samp->highlight_color = (GF_TextHighlightColorBox *) gf_isom_box_new(GF_ISOM_BOX_TYPE_HCLR);
		if (!samp->highlight_color) return GF_OUT_OF_MEM;
	}
	samp->highlight_color->hil_color = argb;
	return GF_OK;
}

/*3GPP spec is quite obscur here*/
GF_Err gf_isom_text_add_karaoke(GF_TextSample *samp, u32 start_time)
{
	if (!samp) return GF_BAD_PARAM;
	samp->cur_karaoke = (GF_TextKaraokeBox *) gf_isom_box_new(GF_ISOM_BOX_TYPE_KROK);
	if (!samp->cur_karaoke) return GF_OUT_OF_MEM;
	samp->cur_karaoke->highlight_starttime = start_time;
	return gf_list_add(samp->others, samp->cur_karaoke);
}

GF_Err gf_isom_text_set_karaoke_segment(GF_TextSample *samp, u32 end_time, u16 start_char, u16 end_char)
{
	if (!samp || !samp->cur_karaoke) return GF_BAD_PARAM;
	samp->cur_karaoke->records = (KaraokeRecord*)realloc(samp->cur_karaoke->records, sizeof(KaraokeRecord)*(samp->cur_karaoke->entrycount+1));
	if (!samp->cur_karaoke->records) return GF_OUT_OF_MEM;
	samp->cur_karaoke->records[samp->cur_karaoke->entrycount].end_charoffset = end_char;
	samp->cur_karaoke->records[samp->cur_karaoke->entrycount].start_charoffset = start_char;
	samp->cur_karaoke->records[samp->cur_karaoke->entrycount].highlight_endtime = end_time;
	samp->cur_karaoke->entrycount++;
	return GF_OK;
}


GF_Err gf_isom_text_set_scroll_delay(GF_TextSample *samp, u32 scroll_delay)
{
	if (!samp) return GF_BAD_PARAM;
	if (!samp->scroll_delay) {
		samp->scroll_delay = (GF_TextScrollDelayBox*) gf_isom_box_new(GF_ISOM_BOX_TYPE_DLAY);
		if (!samp->scroll_delay) return GF_OUT_OF_MEM;
	}
	samp->scroll_delay->scroll_delay = scroll_delay;
	return GF_OK;
}

GF_Err gf_isom_text_add_hyperlink(GF_TextSample *samp, char *URL, char *altString, u16 start_char, u16 end_char)
{
	GF_TextHyperTextBox*a;
	if (!samp) return GF_BAD_PARAM;
	a = (GF_TextHyperTextBox*) gf_isom_box_new(GF_ISOM_BOX_TYPE_HREF);
	if (!a) return GF_OUT_OF_MEM;
	a->startcharoffset = start_char;
	a->endcharoffset = end_char;
	a->URL = URL ? strdup(URL) : NULL;
	a->URL_hint = altString ? strdup(altString) : NULL;
	return gf_list_add(samp->others, a);
}

GF_Err gf_isom_text_set_box(GF_TextSample *samp, s16 top, s16 left, s16 bottom, s16 right)
{
	if (!samp) return GF_BAD_PARAM;
	if (!samp->box) {
		samp->box = (GF_TextBoxBox*) gf_isom_box_new(GF_ISOM_BOX_TYPE_TBOX);
		if (!samp->box) return GF_OUT_OF_MEM;
	}
	samp->box->box.top = top;
	samp->box->box.left = left;
	samp->box->box.bottom = bottom;
	samp->box->box.right = right;
	return GF_OK;
}

GF_Err gf_isom_text_add_blink(GF_TextSample *samp, u16 start_char, u16 end_char)
{
	GF_TextBlinkBox *a;
	if (!samp) return GF_BAD_PARAM;
	a = (GF_TextBlinkBox*) gf_isom_box_new(GF_ISOM_BOX_TYPE_BLNK);
	if (!a) return GF_OUT_OF_MEM;
	a->startcharoffset = start_char;
	a->endcharoffset = end_char;
	return gf_list_add(samp->others, a);
}

GF_Err gf_isom_text_set_wrap(GF_TextSample *samp, u8 wrap_flags)
{
	if (!samp) return GF_BAD_PARAM;
	if (!samp->wrap) {
		samp->wrap = (GF_TextWrapBox*) gf_isom_box_new(GF_ISOM_BOX_TYPE_TWRP);
		if (!samp->wrap) return GF_OUT_OF_MEM;
	}
	samp->wrap->wrap_flag = wrap_flags;
	return GF_OK;
}

static GFINLINE GF_Err gpp_write_modifier(GF_BitStream *bs, GF_Box *a)
{
	GF_Err e;
	if (!a) return GF_OK;
	e = gf_isom_box_size(a);
	if (!e) e = gf_isom_box_write(a, bs);
	return e;
}

GF_ISOSample *gf_isom_text_to_sample(GF_TextSample *samp)
{
	GF_Err e;
	GF_ISOSample *res;
	GF_BitStream *bs;
	u32 i;
	if (!samp) return NULL;

	bs = gf_bs_new(NULL, 0, GF_BITSTREAM_WRITE);
	gf_bs_write_u16(bs, samp->len);
	if (samp->len) gf_bs_write_data(bs, samp->text, samp->len);

	e = gpp_write_modifier(bs, (GF_Box *)samp->styles);
	if (!e) e = gpp_write_modifier(bs, (GF_Box *)samp->highlight_color);
	if (!e) e = gpp_write_modifier(bs, (GF_Box *)samp->scroll_delay);
	if (!e) e = gpp_write_modifier(bs, (GF_Box *)samp->box);
	if (!e) e = gpp_write_modifier(bs, (GF_Box *)samp->wrap);

	if (!e) {
		GF_Box *a;
		i=0;
		while ((a = (GF_Box*)gf_list_enum(samp->others, &i))) {
			e = gpp_write_modifier(bs, a);
			if (e) break;
		}
	}
	if (e) {
		gf_bs_del(bs);
		return NULL;
	}
	res = gf_isom_sample_new();
	if (!res) {
		gf_bs_del(bs);
		return NULL;
	}
	gf_bs_get_content(bs, &res->data, &res->dataLength);
	gf_bs_del(bs);
	res->IsRAP = 1;
	return res;
}

GF_Err gf_isom_text_has_similar_description(GF_ISOFile *movie, u32 trackNumber, GF_TextSampleDescriptor *desc, u32 *outDescIdx, Bool *same_box, Bool *same_styles)
{
	GF_TrackBox *trak;
	GF_Err e;
	u32 i, j, count;
	GF_TextSampleEntryBox *txt;

	*same_box = *same_styles = 0;
	*outDescIdx = 0;

	if (!desc) return GF_BAD_PARAM;
	e = CanAccessMovie(movie, GF_ISOM_OPEN_WRITE);
	if (e) return GF_BAD_PARAM;
	
	trak = gf_isom_get_track_from_file(movie, trackNumber);
	if (!trak || !trak->Media || !desc->font_count) return GF_BAD_PARAM;

	if (trak->Media->handler->handlerType != GF_ISOM_MEDIA_TEXT) return GF_BAD_PARAM;