601 lines
23 KiB
C
601 lines
23 KiB
C
/*
|
|
* SSA/ASS spliting functions
|
|
* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "avcodec.h"
|
|
#include "ass_split.h"
|
|
|
|
typedef enum {
|
|
ASS_STR,
|
|
ASS_INT,
|
|
ASS_FLT,
|
|
ASS_COLOR,
|
|
ASS_TIMESTAMP,
|
|
ASS_ALGN,
|
|
} ASSFieldType;
|
|
|
|
typedef struct {
|
|
const char *name;
|
|
int type;
|
|
int offset;
|
|
} ASSFields;
|
|
|
|
typedef struct {
|
|
const char *section;
|
|
const char *format_header;
|
|
const char *fields_header;
|
|
int size;
|
|
int offset;
|
|
int offset_count;
|
|
ASSFields fields[24];
|
|
} ASSSection;
|
|
|
|
static const ASSSection ass_sections[] = {
|
|
{ .section = "Script Info",
|
|
.offset = offsetof(ASS, script_info),
|
|
.fields = {{"ScriptType", ASS_STR, offsetof(ASSScriptInfo, script_type)},
|
|
{"Collisions", ASS_STR, offsetof(ASSScriptInfo, collisions) },
|
|
{"PlayResX", ASS_INT, offsetof(ASSScriptInfo, play_res_x) },
|
|
{"PlayResY", ASS_INT, offsetof(ASSScriptInfo, play_res_y) },
|
|
{"Timer", ASS_FLT, offsetof(ASSScriptInfo, timer) },
|
|
{0},
|
|
}
|
|
},
|
|
{ .section = "V4+ Styles",
|
|
.format_header = "Format",
|
|
.fields_header = "Style",
|
|
.size = sizeof(ASSStyle),
|
|
.offset = offsetof(ASS, styles),
|
|
.offset_count = offsetof(ASS, styles_count),
|
|
.fields = {{"Name", ASS_STR, offsetof(ASSStyle, name) },
|
|
{"Fontname", ASS_STR, offsetof(ASSStyle, font_name) },
|
|
{"Fontsize", ASS_INT, offsetof(ASSStyle, font_size) },
|
|
{"PrimaryColour", ASS_COLOR, offsetof(ASSStyle, primary_color) },
|
|
{"SecondaryColour", ASS_COLOR, offsetof(ASSStyle, secondary_color)},
|
|
{"OutlineColour", ASS_COLOR, offsetof(ASSStyle, outline_color) },
|
|
{"BackColour", ASS_COLOR, offsetof(ASSStyle, back_color) },
|
|
{"Bold", ASS_INT, offsetof(ASSStyle, bold) },
|
|
{"Italic", ASS_INT, offsetof(ASSStyle, italic) },
|
|
{"Underline", ASS_INT, offsetof(ASSStyle, underline) },
|
|
{"StrikeOut", ASS_INT, offsetof(ASSStyle, strikeout) },
|
|
{"ScaleX", ASS_FLT, offsetof(ASSStyle, scalex) },
|
|
{"ScaleY", ASS_FLT, offsetof(ASSStyle, scaley) },
|
|
{"Spacing", ASS_FLT, offsetof(ASSStyle, spacing) },
|
|
{"Angle", ASS_FLT, offsetof(ASSStyle, angle) },
|
|
{"BorderStyle", ASS_INT, offsetof(ASSStyle, border_style) },
|
|
{"Outline", ASS_FLT, offsetof(ASSStyle, outline) },
|
|
{"Shadow", ASS_FLT, offsetof(ASSStyle, shadow) },
|
|
{"Alignment", ASS_INT, offsetof(ASSStyle, alignment) },
|
|
{"MarginL", ASS_INT, offsetof(ASSStyle, margin_l) },
|
|
{"MarginR", ASS_INT, offsetof(ASSStyle, margin_r) },
|
|
{"MarginV", ASS_INT, offsetof(ASSStyle, margin_v) },
|
|
{"Encoding", ASS_INT, offsetof(ASSStyle, encoding) },
|
|
{0},
|
|
}
|
|
},
|
|
{ .section = "V4 Styles",
|
|
.format_header = "Format",
|
|
.fields_header = "Style",
|
|
.size = sizeof(ASSStyle),
|
|
.offset = offsetof(ASS, styles),
|
|
.offset_count = offsetof(ASS, styles_count),
|
|
.fields = {{"Name", ASS_STR, offsetof(ASSStyle, name) },
|
|
{"Fontname", ASS_STR, offsetof(ASSStyle, font_name) },
|
|
{"Fontsize", ASS_INT, offsetof(ASSStyle, font_size) },
|
|
{"PrimaryColour", ASS_COLOR, offsetof(ASSStyle, primary_color) },
|
|
{"SecondaryColour", ASS_COLOR, offsetof(ASSStyle, secondary_color)},
|
|
{"TertiaryColour", ASS_COLOR, offsetof(ASSStyle, outline_color) },
|
|
{"BackColour", ASS_COLOR, offsetof(ASSStyle, back_color) },
|
|
{"Bold", ASS_INT, offsetof(ASSStyle, bold) },
|
|
{"Italic", ASS_INT, offsetof(ASSStyle, italic) },
|
|
{"BorderStyle", ASS_INT, offsetof(ASSStyle, border_style) },
|
|
{"Outline", ASS_FLT, offsetof(ASSStyle, outline) },
|
|
{"Shadow", ASS_FLT, offsetof(ASSStyle, shadow) },
|
|
{"Alignment", ASS_ALGN, offsetof(ASSStyle, alignment) },
|
|
{"MarginL", ASS_INT, offsetof(ASSStyle, margin_l) },
|
|
{"MarginR", ASS_INT, offsetof(ASSStyle, margin_r) },
|
|
{"MarginV", ASS_INT, offsetof(ASSStyle, margin_v) },
|
|
{"AlphaLevel", ASS_INT, offsetof(ASSStyle, alpha_level) },
|
|
{"Encoding", ASS_INT, offsetof(ASSStyle, encoding) },
|
|
{0},
|
|
}
|
|
},
|
|
{ .section = "Events",
|
|
.format_header = "Format",
|
|
.fields_header = "Dialogue",
|
|
.size = sizeof(ASSDialog),
|
|
.offset = offsetof(ASS, dialogs),
|
|
.offset_count = offsetof(ASS, dialogs_count),
|
|
.fields = {{"Layer", ASS_INT, offsetof(ASSDialog, layer) },
|
|
{"Start", ASS_TIMESTAMP, offsetof(ASSDialog, start) },
|
|
{"End", ASS_TIMESTAMP, offsetof(ASSDialog, end) },
|
|
{"Style", ASS_STR, offsetof(ASSDialog, style) },
|
|
{"Name", ASS_STR, offsetof(ASSDialog, name) },
|
|
{"MarginL", ASS_INT, offsetof(ASSDialog, margin_l)},
|
|
{"MarginR", ASS_INT, offsetof(ASSDialog, margin_r)},
|
|
{"MarginV", ASS_INT, offsetof(ASSDialog, margin_v)},
|
|
{"Effect", ASS_STR, offsetof(ASSDialog, effect) },
|
|
{"Text", ASS_STR, offsetof(ASSDialog, text) },
|
|
{0},
|
|
}
|
|
},
|
|
};
|
|
|
|
|
|
typedef int (*ASSConvertFunc)(void *dest, const char *buf, int len);
|
|
|
|
static int convert_str(void *dest, const char *buf, int len)
|
|
{
|
|
char *str = av_malloc(len + 1);
|
|
if (str) {
|
|
memcpy(str, buf, len);
|
|
str[len] = 0;
|
|
if (*(void **)dest)
|
|
av_free(*(void **)dest);
|
|
*(char **)dest = str;
|
|
}
|
|
return !str;
|
|
}
|
|
static int convert_int(void *dest, const char *buf, int len)
|
|
{
|
|
return sscanf(buf, "%d", (int *)dest) == 1;
|
|
}
|
|
static int convert_flt(void *dest, const char *buf, int len)
|
|
{
|
|
return sscanf(buf, "%f", (float *)dest) == 1;
|
|
}
|
|
static int convert_color(void *dest, const char *buf, int len)
|
|
{
|
|
return sscanf(buf, "&H%8x", (int *)dest) == 1 ||
|
|
sscanf(buf, "%d", (int *)dest) == 1;
|
|
}
|
|
static int convert_timestamp(void *dest, const char *buf, int len)
|
|
{
|
|
int c, h, m, s, cs;
|
|
if ((c = sscanf(buf, "%d:%02d:%02d.%02d", &h, &m, &s, &cs)) == 4)
|
|
*(int *)dest = 360000*h + 6000*m + 100*s + cs;
|
|
return c == 4;
|
|
}
|
|
static int convert_alignment(void *dest, const char *buf, int len)
|
|
{
|
|
int a;
|
|
if (sscanf(buf, "%d", &a) == 1) {
|
|
/* convert V4 Style alignment to V4+ Style */
|
|
*(int *)dest = a + ((a&4) >> 1) - 5*!!(a&8);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const ASSConvertFunc convert_func[] = {
|
|
[ASS_STR] = convert_str,
|
|
[ASS_INT] = convert_int,
|
|
[ASS_FLT] = convert_flt,
|
|
[ASS_COLOR] = convert_color,
|
|
[ASS_TIMESTAMP] = convert_timestamp,
|
|
[ASS_ALGN] = convert_alignment,
|
|
};
|
|
|
|
|
|
struct ASSSplitContext {
|
|
ASS ass;
|
|
int current_section;
|
|
int field_number[FF_ARRAY_ELEMS(ass_sections)];
|
|
int *field_order[FF_ARRAY_ELEMS(ass_sections)];
|
|
};
|
|
|
|
|
|
static uint8_t *realloc_section_array(ASSSplitContext *ctx)
|
|
{
|
|
const ASSSection *section = &ass_sections[ctx->current_section];
|
|
int *count = (int *)((uint8_t *)&ctx->ass + section->offset_count);
|
|
void **section_ptr = (void **)((uint8_t *)&ctx->ass + section->offset);
|
|
uint8_t *tmp = av_realloc_array(*section_ptr, (*count+1), section->size);
|
|
if (!tmp)
|
|
return NULL;
|
|
*section_ptr = tmp;
|
|
tmp += *count * section->size;
|
|
memset(tmp, 0, section->size);
|
|
(*count)++;
|
|
return tmp;
|
|
}
|
|
|
|
static inline int is_eol(char buf)
|
|
{
|
|
return buf == '\r' || buf == '\n' || buf == 0;
|
|
}
|
|
|
|
static inline const char *skip_space(const char *buf)
|
|
{
|
|
while (*buf == ' ')
|
|
buf++;
|
|
return buf;
|
|
}
|
|
|
|
static int *get_default_field_orders(const ASSSection *section, int *number)
|
|
{
|
|
int i;
|
|
int *order = av_malloc_array(FF_ARRAY_ELEMS(section->fields), sizeof(*order));
|
|
|
|
if (!order)
|
|
return NULL;
|
|
for (i = 0; section->fields[i].name; i++)
|
|
order[i] = i;
|
|
*number = i;
|
|
while (i < FF_ARRAY_ELEMS(section->fields))
|
|
order[i++] = -1;
|
|
return order;
|
|
}
|
|
|
|
static const char *ass_split_section(ASSSplitContext *ctx, const char *buf)
|
|
{
|
|
const ASSSection *section = &ass_sections[ctx->current_section];
|
|
int *number = &ctx->field_number[ctx->current_section];
|
|
int *order = ctx->field_order[ctx->current_section];
|
|
int i, len;
|
|
|
|
while (buf && *buf) {
|
|
if (buf[0] == '[') {
|
|
ctx->current_section = -1;
|
|
break;
|
|
}
|
|
if (buf[0] == ';' || (buf[0] == '!' && buf[1] == ':'))
|
|
goto next_line; // skip comments
|
|
|
|
len = strcspn(buf, ":\r\n");
|
|
if (buf[len] == ':' &&
|
|
(!section->fields_header || strncmp(buf, section->fields_header, len))) {
|
|
for (i = 0; i < FF_ARRAY_ELEMS(ass_sections); i++) {
|
|
if (ass_sections[i].fields_header &&
|
|
!strncmp(buf, ass_sections[i].fields_header, len)) {
|
|
ctx->current_section = i;
|
|
section = &ass_sections[ctx->current_section];
|
|
number = &ctx->field_number[ctx->current_section];
|
|
order = ctx->field_order[ctx->current_section];
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (section->format_header && !order) {
|
|
len = strlen(section->format_header);
|
|
if (!strncmp(buf, section->format_header, len) && buf[len] == ':') {
|
|
buf += len + 1;
|
|
while (!is_eol(*buf)) {
|
|
buf = skip_space(buf);
|
|
len = strcspn(buf, ", \r\n");
|
|
if (av_reallocp_array(&order, (*number + 1), sizeof(*order)) != 0)
|
|
return NULL;
|
|
|
|
order[*number] = -1;
|
|
for (i=0; section->fields[i].name; i++)
|
|
if (!strncmp(buf, section->fields[i].name, len)) {
|
|
order[*number] = i;
|
|
break;
|
|
}
|
|
(*number)++;
|
|
buf = skip_space(buf + len + (buf[len] == ','));
|
|
}
|
|
ctx->field_order[ctx->current_section] = order;
|
|
goto next_line;
|
|
}
|
|
}
|
|
if (section->fields_header) {
|
|
len = strlen(section->fields_header);
|
|
if (!strncmp(buf, section->fields_header, len) && buf[len] == ':') {
|
|
uint8_t *ptr, *struct_ptr = realloc_section_array(ctx);
|
|
if (!struct_ptr) return NULL;
|
|
|
|
/* No format header line found so far, assume default */
|
|
if (!order) {
|
|
order = get_default_field_orders(section, number);
|
|
if (!order)
|
|
return NULL;
|
|
ctx->field_order[ctx->current_section] = order;
|
|
}
|
|
|
|
buf += len + 1;
|
|
for (i=0; !is_eol(*buf) && i < *number; i++) {
|
|
int last = i == *number - 1;
|
|
buf = skip_space(buf);
|
|
len = strcspn(buf, last ? "\r\n" : ",\r\n");
|
|
if (order[i] >= 0) {
|
|
ASSFieldType type = section->fields[order[i]].type;
|
|
ptr = struct_ptr + section->fields[order[i]].offset;
|
|
convert_func[type](ptr, buf, len);
|
|
}
|
|
buf += len;
|
|
if (!last && *buf) buf++;
|
|
buf = skip_space(buf);
|
|
}
|
|
}
|
|
} else {
|
|
len = strcspn(buf, ":\r\n");
|
|
if (buf[len] == ':') {
|
|
for (i=0; section->fields[i].name; i++)
|
|
if (!strncmp(buf, section->fields[i].name, len)) {
|
|
ASSFieldType type = section->fields[i].type;
|
|
uint8_t *ptr = (uint8_t *)&ctx->ass + section->offset;
|
|
ptr += section->fields[i].offset;
|
|
buf = skip_space(buf + len + 1);
|
|
convert_func[type](ptr, buf, strcspn(buf, "\r\n"));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
next_line:
|
|
buf += strcspn(buf, "\n");
|
|
buf += !!*buf;
|
|
}
|
|
return buf;
|
|
}
|
|
|
|
static int ass_split(ASSSplitContext *ctx, const char *buf)
|
|
{
|
|
char c, section[16];
|
|
int i;
|
|
|
|
if (ctx->current_section >= 0)
|
|
buf = ass_split_section(ctx, buf);
|
|
|
|
while (buf && *buf) {
|
|
if (sscanf(buf, "[%15[0-9A-Za-z+ ]]%c", section, &c) == 2) {
|
|
buf += strcspn(buf, "\n");
|
|
buf += !!*buf;
|
|
for (i=0; i<FF_ARRAY_ELEMS(ass_sections); i++)
|
|
if (!strcmp(section, ass_sections[i].section)) {
|
|
ctx->current_section = i;
|
|
buf = ass_split_section(ctx, buf);
|
|
}
|
|
} else {
|
|
buf += strcspn(buf, "\n");
|
|
buf += !!*buf;
|
|
}
|
|
}
|
|
return buf ? 0 : AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
ASSSplitContext *ff_ass_split(const char *buf)
|
|
{
|
|
ASSSplitContext *ctx = av_mallocz(sizeof(*ctx));
|
|
if (!ctx)
|
|
return NULL;
|
|
if (buf && !memcmp(buf, "\xef\xbb\xbf", 3)) // Skip UTF-8 BOM header
|
|
buf += 3;
|
|
ctx->current_section = -1;
|
|
if (ass_split(ctx, buf) < 0) {
|
|
ff_ass_split_free(ctx);
|
|
return NULL;
|
|
}
|
|
return ctx;
|
|
}
|
|
|
|
static void free_section(ASSSplitContext *ctx, const ASSSection *section)
|
|
{
|
|
uint8_t *ptr = (uint8_t *)&ctx->ass + section->offset;
|
|
int i, j, *count, c = 1;
|
|
|
|
if (section->format_header) {
|
|
ptr = *(void **)ptr;
|
|
count = (int *)((uint8_t *)&ctx->ass + section->offset_count);
|
|
} else
|
|
count = &c;
|
|
|
|
if (ptr)
|
|
for (i=0; i<*count; i++, ptr += section->size)
|
|
for (j=0; section->fields[j].name; j++) {
|
|
const ASSFields *field = §ion->fields[j];
|
|
if (field->type == ASS_STR)
|
|
av_freep(ptr + field->offset);
|
|
}
|
|
*count = 0;
|
|
|
|
if (section->format_header)
|
|
av_freep((uint8_t *)&ctx->ass + section->offset);
|
|
}
|
|
|
|
ASSDialog *ff_ass_split_dialog(ASSSplitContext *ctx, const char *buf,
|
|
int cache, int *number)
|
|
{
|
|
ASSDialog *dialog = NULL;
|
|
int i, count;
|
|
if (!cache)
|
|
for (i=0; i<FF_ARRAY_ELEMS(ass_sections); i++)
|
|
if (!strcmp(ass_sections[i].section, "Events")) {
|
|
free_section(ctx, &ass_sections[i]);
|
|
break;
|
|
}
|
|
count = ctx->ass.dialogs_count;
|
|
if (ass_split(ctx, buf) == 0)
|
|
dialog = ctx->ass.dialogs + count;
|
|
if (number)
|
|
*number = ctx->ass.dialogs_count - count;
|
|
return dialog;
|
|
}
|
|
|
|
void ff_ass_free_dialog(ASSDialog **dialogp)
|
|
{
|
|
ASSDialog *dialog = *dialogp;
|
|
if (!dialog)
|
|
return;
|
|
av_freep(&dialog->style);
|
|
av_freep(&dialog->name);
|
|
av_freep(&dialog->effect);
|
|
av_freep(&dialog->text);
|
|
av_freep(dialogp);
|
|
}
|
|
|
|
ASSDialog *ff_ass_split_dialog2(ASSSplitContext *ctx, const char *buf)
|
|
{
|
|
int i;
|
|
static const ASSFields fields[] = {
|
|
{"ReadOrder", ASS_INT, offsetof(ASSDialog, readorder)},
|
|
{"Layer", ASS_INT, offsetof(ASSDialog, layer) },
|
|
{"Style", ASS_STR, offsetof(ASSDialog, style) },
|
|
{"Name", ASS_STR, offsetof(ASSDialog, name) },
|
|
{"MarginL", ASS_INT, offsetof(ASSDialog, margin_l) },
|
|
{"MarginR", ASS_INT, offsetof(ASSDialog, margin_r) },
|
|
{"MarginV", ASS_INT, offsetof(ASSDialog, margin_v) },
|
|
{"Effect", ASS_STR, offsetof(ASSDialog, effect) },
|
|
{"Text", ASS_STR, offsetof(ASSDialog, text) },
|
|
};
|
|
|
|
ASSDialog *dialog = av_mallocz(sizeof(*dialog));
|
|
if (!dialog)
|
|
return NULL;
|
|
|
|
for (i = 0; i < FF_ARRAY_ELEMS(fields); i++) {
|
|
size_t len;
|
|
const int last = i == FF_ARRAY_ELEMS(fields) - 1;
|
|
const ASSFieldType type = fields[i].type;
|
|
uint8_t *ptr = (uint8_t *)dialog + fields[i].offset;
|
|
buf = skip_space(buf);
|
|
len = last ? strlen(buf) : strcspn(buf, ",");
|
|
if (len >= INT_MAX) {
|
|
ff_ass_free_dialog(&dialog);
|
|
return NULL;
|
|
}
|
|
convert_func[type](ptr, buf, len);
|
|
buf += len;
|
|
if (*buf) buf++;
|
|
}
|
|
return dialog;
|
|
}
|
|
|
|
void ff_ass_split_free(ASSSplitContext *ctx)
|
|
{
|
|
if (ctx) {
|
|
int i;
|
|
for (i=0; i<FF_ARRAY_ELEMS(ass_sections); i++) {
|
|
free_section(ctx, &ass_sections[i]);
|
|
av_freep(&(ctx->field_order[i]));
|
|
}
|
|
av_free(ctx);
|
|
}
|
|
}
|
|
|
|
|
|
int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv,
|
|
const char *buf)
|
|
{
|
|
const char *text = NULL;
|
|
char new_line[2];
|
|
int text_len = 0;
|
|
|
|
while (buf && *buf) {
|
|
if (text && callbacks->text &&
|
|
(sscanf(buf, "\\%1[nN]", new_line) == 1 ||
|
|
!strncmp(buf, "{\\", 2))) {
|
|
callbacks->text(priv, text, text_len);
|
|
text = NULL;
|
|
}
|
|
if (sscanf(buf, "\\%1[nN]", new_line) == 1) {
|
|
if (callbacks->new_line)
|
|
callbacks->new_line(priv, new_line[0] == 'N');
|
|
buf += 2;
|
|
} else if (!strncmp(buf, "{\\", 2)) {
|
|
buf++;
|
|
while (*buf == '\\') {
|
|
char style[2], c[2], sep[2], c_num[2] = "0", tmp[128] = {0};
|
|
unsigned int color = 0xFFFFFFFF;
|
|
int len, size = -1, an = -1, alpha = -1;
|
|
int x1, y1, x2, y2, t1 = -1, t2 = -1;
|
|
if (sscanf(buf, "\\%1[bisu]%1[01\\}]%n", style, c, &len) > 1) {
|
|
int close = c[0] == '0' ? 1 : c[0] == '1' ? 0 : -1;
|
|
len += close != -1;
|
|
if (callbacks->style)
|
|
callbacks->style(priv, style[0], close);
|
|
} else if (sscanf(buf, "\\c%1[\\}]%n", sep, &len) > 0 ||
|
|
sscanf(buf, "\\c&H%X&%1[\\}]%n", &color, sep, &len) > 1 ||
|
|
sscanf(buf, "\\%1[1234]c%1[\\}]%n", c_num, sep, &len) > 1 ||
|
|
sscanf(buf, "\\%1[1234]c&H%X&%1[\\}]%n", c_num, &color, sep, &len) > 2) {
|
|
if (callbacks->color)
|
|
callbacks->color(priv, color, c_num[0] - '0');
|
|
} else if (sscanf(buf, "\\alpha%1[\\}]%n", sep, &len) > 0 ||
|
|
sscanf(buf, "\\alpha&H%2X&%1[\\}]%n", &alpha, sep, &len) > 1 ||
|
|
sscanf(buf, "\\%1[1234]a%1[\\}]%n", c_num, sep, &len) > 1 ||
|
|
sscanf(buf, "\\%1[1234]a&H%2X&%1[\\}]%n", c_num, &alpha, sep, &len) > 2) {
|
|
if (callbacks->alpha)
|
|
callbacks->alpha(priv, alpha, c_num[0] - '0');
|
|
} else if (sscanf(buf, "\\fn%1[\\}]%n", sep, &len) > 0 ||
|
|
sscanf(buf, "\\fn%127[^\\}]%1[\\}]%n", tmp, sep, &len) > 1) {
|
|
if (callbacks->font_name)
|
|
callbacks->font_name(priv, tmp[0] ? tmp : NULL);
|
|
} else if (sscanf(buf, "\\fs%1[\\}]%n", sep, &len) > 0 ||
|
|
sscanf(buf, "\\fs%u%1[\\}]%n", &size, sep, &len) > 1) {
|
|
if (callbacks->font_size)
|
|
callbacks->font_size(priv, size);
|
|
} else if (sscanf(buf, "\\a%1[\\}]%n", sep, &len) > 0 ||
|
|
sscanf(buf, "\\a%2u%1[\\}]%n", &an, sep, &len) > 1 ||
|
|
sscanf(buf, "\\an%1[\\}]%n", sep, &len) > 0 ||
|
|
sscanf(buf, "\\an%1u%1[\\}]%n", &an, sep, &len) > 1) {
|
|
if (an != -1 && buf[2] != 'n')
|
|
an = (an&3) + (an&4 ? 6 : an&8 ? 3 : 0);
|
|
if (callbacks->alignment)
|
|
callbacks->alignment(priv, an);
|
|
} else if (sscanf(buf, "\\r%1[\\}]%n", sep, &len) > 0 ||
|
|
sscanf(buf, "\\r%127[^\\}]%1[\\}]%n", tmp, sep, &len) > 1) {
|
|
if (callbacks->cancel_overrides)
|
|
callbacks->cancel_overrides(priv, tmp);
|
|
} else if (sscanf(buf, "\\move(%d,%d,%d,%d)%1[\\}]%n", &x1, &y1, &x2, &y2, sep, &len) > 4 ||
|
|
sscanf(buf, "\\move(%d,%d,%d,%d,%d,%d)%1[\\}]%n", &x1, &y1, &x2, &y2, &t1, &t2, sep, &len) > 6) {
|
|
if (callbacks->move)
|
|
callbacks->move(priv, x1, y1, x2, y2, t1, t2);
|
|
} else if (sscanf(buf, "\\pos(%d,%d)%1[\\}]%n", &x1, &y1, sep, &len) > 2) {
|
|
if (callbacks->move)
|
|
callbacks->move(priv, x1, y1, x1, y1, -1, -1);
|
|
} else if (sscanf(buf, "\\org(%d,%d)%1[\\}]%n", &x1, &y1, sep, &len) > 2) {
|
|
if (callbacks->origin)
|
|
callbacks->origin(priv, x1, y1);
|
|
} else {
|
|
len = strcspn(buf+1, "\\}") + 2; /* skip unknown code */
|
|
}
|
|
buf += len - 1;
|
|
}
|
|
if (*buf++ != '}')
|
|
return AVERROR_INVALIDDATA;
|
|
} else {
|
|
if (!text) {
|
|
text = buf;
|
|
text_len = 1;
|
|
} else
|
|
text_len++;
|
|
buf++;
|
|
}
|
|
}
|
|
if (text && callbacks->text)
|
|
callbacks->text(priv, text, text_len);
|
|
if (callbacks->end)
|
|
callbacks->end(priv);
|
|
return 0;
|
|
}
|
|
|
|
ASSStyle *ff_ass_style_get(ASSSplitContext *ctx, const char *style)
|
|
{
|
|
ASS *ass = &ctx->ass;
|
|
int i;
|
|
|
|
if (!style || !*style)
|
|
style = "Default";
|
|
for (i=0; i<ass->styles_count; i++)
|
|
if (ass->styles[i].name && !strcmp(ass->styles[i].name, style))
|
|
return ass->styles + i;
|
|
return NULL;
|
|
}
|