M4Err tx3g_Read(Atom *s, BitStream *bs, u64 *read)
{
M4Err e;
u64 sr;
Atom *a;
TextSampleEntryAtom *ptr = (TextSampleEntryAtom*)s;
BS_ReadData(bs, (unsigned char*)ptr->reserved, 6);
ptr->dataReferenceIndex = BS_ReadInt(bs, 16);
ptr->displayFlags = BS_ReadInt(bs, 32);
ptr->horizontal_justification = BS_ReadInt(bs, 8);
ptr->vertical_justification = BS_ReadInt(bs, 8);
ptr->back_color = gpp_read_rgba(bs);
gpp_read_box(bs, &ptr->default_box);
gpp_read_style(bs, &ptr->default_style);
*read += 18 + GPP_BOX_SIZE + GPP_STYLE_SIZE;
while (*read < ptr->size) {
e = ParseAtom(&a, bs, &sr);
if (e) return e;
*read += a->size;
if (a->type==FontTableAtomType) {
if (ptr->font_table) DelAtom((Atom *) ptr->font_table);
ptr->font_table = (FontTableAtom *)a;
} else {
DelAtom(a);
}
}
if (*read != ptr->size) return M4ReadAtomFailed;
return M4OK;
}
GF_Err tx3g_Read(GF_Box *s, GF_BitStream *bs)
{
GF_Err e;
GF_Box *a;
GF_Tx3gSampleEntryBox *ptr = (GF_Tx3gSampleEntryBox*)s;
if (ptr->size < 18 + GPP_BOX_SIZE + GPP_STYLE_SIZE) return GF_ISOM_INVALID_FILE;
gf_bs_read_data(bs, ptr->reserved, 6);
ptr->dataReferenceIndex = gf_bs_read_u16(bs);
ptr->displayFlags = gf_bs_read_u32(bs);
ptr->horizontal_justification = gf_bs_read_u8(bs);
ptr->vertical_justification = gf_bs_read_u8(bs);
ptr->back_color = gpp_read_rgba(bs);
gpp_read_box(bs, &ptr->default_box);
gpp_read_style(bs, &ptr->default_style);
ptr->size -= 18 + GPP_BOX_SIZE + GPP_STYLE_SIZE;
while (ptr->size) {
e = gf_isom_parse_box(&a, bs);
if (e) return e;
if (ptr->size<a->size) return GF_ISOM_INVALID_FILE;
ptr->size -= a->size;
if (a->type==GF_ISOM_BOX_TYPE_FTAB) {
if (ptr->font_table) gf_isom_box_del((GF_Box *) ptr->font_table);
ptr->font_table = (GF_FontTableBox *)a;
} else {
gf_isom_box_del(a);
}
}
return GF_OK;
}
static void gpp_read_style(BitStream *bs, StyleRecord *rec)
{
rec->startChar = BS_ReadInt(bs, 16);
rec->endChar = BS_ReadInt(bs, 16);
rec->fontID = BS_ReadInt(bs, 16);
rec->style_flags = BS_ReadInt(bs, 8);
rec->font_size = BS_ReadInt(bs, 8);
rec->text_color = gpp_read_rgba(bs);
}
static void gpp_read_style(GF_BitStream *bs, GF_StyleRecord *rec)
{
rec->startCharOffset = gf_bs_read_u16(bs);
rec->endCharOffset = gf_bs_read_u16(bs);
rec->fontID = gf_bs_read_u16(bs);
rec->style_flags = gf_bs_read_u8(bs);
rec->font_size = gf_bs_read_u8(bs);
rec->text_color = gpp_read_rgba(bs);
}
GF_Err tx3g_Read(GF_Box *s, GF_BitStream *bs)
{
GF_Err e;
GF_Box *a;
GF_Tx3gSampleEntryBox *ptr = (GF_Tx3gSampleEntryBox*)s;
if (ptr->size < 18 + GPP_BOX_SIZE + GPP_STYLE_SIZE) return GF_ISOM_INVALID_FILE;
gf_bs_read_data(bs, ptr->reserved, 6);
ptr->dataReferenceIndex = gf_bs_read_u16(bs);
ptr->displayFlags = gf_bs_read_u32(bs);
ptr->horizontal_justification = gf_bs_read_u8(bs);
ptr->vertical_justification = gf_bs_read_u8(bs);
ptr->back_color = gpp_read_rgba(bs);
gpp_read_box(bs, &ptr->default_box);
gpp_read_style(bs, &ptr->default_style);
ptr->size -= 18 + GPP_BOX_SIZE + GPP_STYLE_SIZE;
while (ptr->size) {
if (ptr->size < 8) {
/* Sometimes there are void atoms at the end of an atom and they are not parsed correctecly */
/* So just skip them if we have less than 8 bytes to parse */
/* "The actual size of an atom cannot be less than 8 bytes" from QTFF specs */
ptr->size = 0;
return GF_OK;
}
e = gf_isom_parse_box(&a, bs);
if (e) return e;
if (ptr->size<a->size) return GF_ISOM_INVALID_FILE;
ptr->size -= a->size;
if (a->type==GF_ISOM_BOX_TYPE_FTAB) {
if (ptr->font_table) gf_isom_box_del((GF_Box *) ptr->font_table);
ptr->font_table = (GF_FontTableBox *)a;
} else {
gf_isom_box_del(a);
}
}
return GF_OK;
}
GF_Err tx3g_Read(GF_Box *s, GF_BitStream *bs)
{
GF_Err e;
GF_Box *a;
GF_Tx3gSampleEntryBox *ptr = (GF_Tx3gSampleEntryBox*)s;
if (ptr->size < 18 + GPP_BOX_SIZE + GPP_STYLE_SIZE) return GF_ISOM_INVALID_FILE;
gf_bs_read_data(bs, ptr->reserved, 6);
ptr->dataReferenceIndex = gf_bs_read_u16(bs);
ptr->displayFlags = gf_bs_read_u32(bs);
ptr->horizontal_justification = gf_bs_read_u8(bs);
ptr->vertical_justification = gf_bs_read_u8(bs);
ptr->back_color = gpp_read_rgba(bs);
gpp_read_box(bs, &ptr->default_box);
gpp_read_style(bs, &ptr->default_style);
ptr->size -= 18 + GPP_BOX_SIZE + GPP_STYLE_SIZE;
while (ptr->size >= 8) {
e = gf_isom_parse_box(&a, bs);
if (e) return e;
if (ptr->size<a->size) {
GF_LOG(GF_LOG_WARNING, GF_LOG_CONTAINER, ("[iso file] Box \"%s\" larger than remaining bytes in tx3g - ignoring box\n", gf_4cc_to_str(a->type)));
ptr->size = 0;
gf_isom_box_del(a);
return GF_OK;
}
ptr->size -= a->size;
if (a->type == GF_ISOM_BOX_TYPE_FTAB) {
if (ptr->font_table) gf_isom_box_del((GF_Box *)ptr->font_table);
ptr->font_table = (GF_FontTableBox *)a;
}
else {
e = gf_isom_box_add_default(s, a);
if (e) return e;
}
}
return GF_OK;
}
