207 lines
7.3 KiB
C
Executable file
207 lines
7.3 KiB
C
Executable file
/*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef AVCODEC_ASS_SPLIT_H
|
|
#define AVCODEC_ASS_SPLIT_H
|
|
|
|
/**
|
|
* fields extracted from the [Script Info] section
|
|
*/
|
|
typedef struct {
|
|
char *script_type; /**< SSA script format version (eg. v4.00) */
|
|
char *collisions; /**< how subtitles are moved to prevent collisions */
|
|
int play_res_x; /**< video width that ASS coords are referring to */
|
|
int play_res_y; /**< video height that ASS coords are referring to */
|
|
float timer; /**< time multiplier to apply to SSA clock (in %) */
|
|
} ASSScriptInfo;
|
|
|
|
/**
|
|
* fields extracted from the [V4(+) Styles] section
|
|
*/
|
|
typedef struct {
|
|
char *name; /**< name of the tyle (case sensitive) */
|
|
char *font_name; /**< font face (case sensitive) */
|
|
int font_size; /**< font height */
|
|
int primary_color; /**< color that a subtitle will normally appear in */
|
|
int secondary_color;
|
|
int outline_color; /**< color for outline in ASS, called tertiary in SSA */
|
|
int back_color; /**< color of the subtitle outline or shadow */
|
|
int bold; /**< whether text is bold (1) or not (0) */
|
|
int italic; /**< whether text is italic (1) or not (0) */
|
|
int underline; /**< whether text is underlined (1) or not (0) */
|
|
int strikeout;
|
|
float scalex;
|
|
float scaley;
|
|
float spacing;
|
|
float angle;
|
|
int border_style;
|
|
float outline;
|
|
float shadow;
|
|
int alignment; /**< position of the text (left, center, top...),
|
|
defined after the layout of the numpad
|
|
(1-3 sub, 4-6 mid, 7-9 top) */
|
|
int margin_l;
|
|
int margin_r;
|
|
int margin_v;
|
|
int alpha_level;
|
|
int encoding;
|
|
} ASSStyle;
|
|
|
|
/**
|
|
* fields extracted from the [Events] section
|
|
*/
|
|
typedef struct {
|
|
int readorder;
|
|
int layer; /**< higher numbered layers are drawn over lower numbered */
|
|
int start; /**< start time of the dialog in centiseconds */
|
|
int end; /**< end time of the dialog in centiseconds */
|
|
char *style; /**< name of the ASSStyle to use with this dialog */
|
|
char *name;
|
|
int margin_l;
|
|
int margin_r;
|
|
int margin_v;
|
|
char *effect;
|
|
char *text; /**< actual text which will be displayed as a subtitle,
|
|
can include style override control codes (see
|
|
ff_ass_split_override_codes()) */
|
|
} ASSDialog;
|
|
|
|
/**
|
|
* structure containing the whole split ASS data
|
|
*/
|
|
typedef struct {
|
|
ASSScriptInfo script_info; /**< general information about the SSA script*/
|
|
ASSStyle *styles; /**< array of split out styles */
|
|
int styles_count; /**< number of ASSStyle in the styles array */
|
|
ASSDialog *dialogs; /**< array of split out dialogs */
|
|
int dialogs_count; /**< number of ASSDialog in the dialogs array*/
|
|
} ASS;
|
|
|
|
/**
|
|
* This struct can be casted to ASS to access to the split data.
|
|
*/
|
|
typedef struct ASSSplitContext ASSSplitContext;
|
|
|
|
/**
|
|
* Split a full ASS file or a ASS header from a string buffer and store
|
|
* the split structure in a newly allocated context.
|
|
*
|
|
* @param buf String containing the ASS formatted data.
|
|
* @return Newly allocated struct containing split data.
|
|
*/
|
|
ASSSplitContext *ff_ass_split(const char *buf);
|
|
|
|
/**
|
|
* Split one or several ASS "Dialogue" lines from a string buffer and store
|
|
* them in an already initialized context.
|
|
*
|
|
* @param ctx Context previously initialized by ff_ass_split().
|
|
* @param buf String containing the ASS "Dialogue" lines.
|
|
* @param cache Set to 1 to keep all the previously split ASSDialog in
|
|
* the context, or set to 0 to free all the previously split
|
|
* ASSDialog.
|
|
* @param number If not NULL, the pointed integer will be set to the number
|
|
* of split ASSDialog.
|
|
* @return Pointer to the first split ASSDialog.
|
|
*/
|
|
ASSDialog *ff_ass_split_dialog(ASSSplitContext *ctx, const char *buf,
|
|
int cache, int *number);
|
|
|
|
/**
|
|
* Free a dialogue obtained from ff_ass_split_dialog2().
|
|
*/
|
|
void ff_ass_free_dialog(ASSDialog **dialogp);
|
|
|
|
/**
|
|
* Split one ASS Dialogue line from a string buffer.
|
|
*
|
|
* @param ctx Context previously initialized by ff_ass_split().
|
|
* @param buf String containing the ASS "Dialogue" line.
|
|
* @return Pointer to the split ASSDialog. Must be freed with ff_ass_free_dialog()
|
|
*/
|
|
ASSDialog *ff_ass_split_dialog2(ASSSplitContext *ctx, const char *buf);
|
|
|
|
/**
|
|
* Free all the memory allocated for an ASSSplitContext.
|
|
*
|
|
* @param ctx Context previously initialized by ff_ass_split().
|
|
*/
|
|
void ff_ass_split_free(ASSSplitContext *ctx);
|
|
|
|
|
|
/**
|
|
* Set of callback functions corresponding to each override codes that can
|
|
* be encountered in a "Dialogue" Text field.
|
|
*/
|
|
typedef struct {
|
|
/**
|
|
* @defgroup ass_styles ASS styles
|
|
* @{
|
|
*/
|
|
void (*text)(void *priv, const char *text, int len);
|
|
void (*new_line)(void *priv, int forced);
|
|
void (*style)(void *priv, char style, int close);
|
|
void (*color)(void *priv, unsigned int /* color */, unsigned int color_id);
|
|
void (*alpha)(void *priv, int alpha, int alpha_id);
|
|
void (*font_name)(void *priv, const char *name);
|
|
void (*font_size)(void *priv, int size);
|
|
void (*alignment)(void *priv, int alignment);
|
|
void (*cancel_overrides)(void *priv, const char *style);
|
|
/** @} */
|
|
|
|
/**
|
|
* @defgroup ass_functions ASS functions
|
|
* @{
|
|
*/
|
|
void (*move)(void *priv, int x1, int y1, int x2, int y2, int t1, int t2);
|
|
void (*origin)(void *priv, int x, int y);
|
|
/** @} */
|
|
|
|
/**
|
|
* @defgroup ass_end end of Dialogue Event
|
|
* @{
|
|
*/
|
|
void (*end)(void *priv);
|
|
/** @} */
|
|
} ASSCodesCallbacks;
|
|
|
|
/**
|
|
* Split override codes out of a ASS "Dialogue" Text field.
|
|
*
|
|
* @param callbacks Set of callback functions called for each override code
|
|
* encountered.
|
|
* @param priv Opaque pointer passed to the callback functions.
|
|
* @param buf The ASS "Dialogue" Text field to split.
|
|
* @return >= 0 on success otherwise an error code <0
|
|
*/
|
|
int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv,
|
|
const char *buf);
|
|
|
|
/**
|
|
* Find an ASSStyle structure by its name.
|
|
*
|
|
* @param ctx Context previously initialized by ff_ass_split().
|
|
* @param style name of the style to search for.
|
|
* @return the ASSStyle corresponding to style, or NULL if style can't be found
|
|
*/
|
|
ASSStyle *ff_ass_style_get(ASSSplitContext *ctx, const char *style);
|
|
|
|
#endif /* AVCODEC_ASS_SPLIT_H */
|