30 #define SRT_STACK_SIZE 64 43 __attribute__ ((__format__ (__printf__, 2, 3)))
79 srt_print(s,
"</%c%s>", tag, tag ==
'f' ?
"ont" :
"");
109 (c & 0xFF0000) >> 16 | c & 0xFF00 | (c & 0xFF) << 16);
165 if (color != 0xFFFFFFFF)
166 srt_print(priv,
"<font color=\"#%06x\">",
167 (color & 0xFF0000) >> 16 | color & 0xFF00 | (color & 0xFF) << 16);
174 srt_print(priv,
"<font face=\"%s\">", name);
181 srt_print(priv,
"<font size=\"%d\">", size);
247 #if FF_API_ASS_TIMING 248 if (!strncmp(ass,
"Dialogue: ", 10)) {
251 for (; dialog && num--; dialog++) {
267 #if FF_API_ASS_TIMING 277 if (s->
buffer.len > bufsize) {
289 return encode_frame(avctx, buf, bufsize, sub, &srt_callbacks);
295 return encode_frame(avctx, buf, bufsize, sub, &text_callbacks);
306 #if CONFIG_SRT_ENCODER 320 #if CONFIG_SUBRIP_ENCODER 333 #if CONFIG_TEXT_ENCODER
char * style
name of the ASSStyle to use with this dialog
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static int text_encode_frame(AVCodecContext *avctx, unsigned char *buf, int bufsize, const AVSubtitle *sub)
fields extracted from the [Events] section
static av_cold int init(AVCodecContext *avctx)
ASSDialog * ff_ass_split_dialog2(ASSSplitContext *ctx, const char *buf)
Split one ASS Dialogue line from a string buffer.
ASSSplitContext * ff_ass_split(const char *buf)
Split a full ASS file or a ASS header from a string buffer and store the split structure in a newly a...
static const ASSCodesCallbacks srt_callbacks
static av_cold int srt_encode_init(AVCodecContext *avctx)
static int srt_encode_frame(AVCodecContext *avctx, unsigned char *buf, int bufsize, const AVSubtitle *sub)
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
char * text
actual text which will be displayed as a subtitle, can include style override control codes (see ff_a...
int alignment
position of the text (left, center, top...), defined after the layout of the numpad (1-3 sub...
static double cb(void *priv, double x, double y)
This struct can be casted to ASS to access to the split data.
#define ASS_DEFAULT_ALIGNMENT
static char srt_stack_pop(SRTContext *s)
void ff_ass_free_dialog(ASSDialog **dialogp)
Free a dialogue obtained from ff_ass_split_dialog2().
static void srt_font_size_cb(void *priv, int size)
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
int bold
whether text is bold (1) or not (0)
int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv, const char *buf)
Split override codes out of a ASS "Dialogue" Text field.
void av_bprint_append_data(AVBPrint *buf, const char *data, unsigned size)
Append data to a print buffer.
static int srt_encode_close(AVCodecContext *avctx)
ASSDialog * ff_ass_split_dialog(ASSSplitContext *ctx, const char *buf, int cache, int *number)
Split one or several ASS "Dialogue" lines from a string buffer and store them in an already initializ...
#define ASS_DEFAULT_UNDERLINE
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define AV_BPRINT_SIZE_UNLIMITED
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
const char * name
Name of the codec implementation.
#define ASS_DEFAULT_FONT_SIZE
char stack[SRT_STACK_SIZE]
static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int bufsize, const AVSubtitle *sub, const ASSCodesCallbacks *cb)
static void srt_color_cb(void *priv, unsigned int color, unsigned int color_id)
static void srt_close_tag(SRTContext *s, char tag)
#define AVERROR_BUFFER_TOO_SMALL
Buffer too small.
static void srt_move_cb(void *priv, int x1, int y1, int x2, int y2, int t1, int t2)
static int srt_stack_push(SRTContext *s, const char c)
int italic
whether text is italic (1) or not (0)
static int av_bprint_is_complete(const AVBPrint *buf)
Test if the print buffer is complete (not truncated).
Set of callback functions corresponding to each override codes that can be encountered in a "Dialogue...
static void srt_style_apply(SRTContext *s, const char *style)
int primary_color
color that a subtitle will normally appear in
Libavcodec external API header.
main external API structure.
ASSSplitContext * ass_ctx
AVCodec ff_subrip_encoder
void av_vbprintf(AVBPrint *buf, const char *fmt, va_list vl_arg)
Append a formatted string to a print buffer.
static void srt_cancel_overrides_cb(void *priv, const char *style)
char * font_name
font face (case sensitive)
fields extracted from the [V4(+) Styles] section
ASSStyle * ff_ass_style_get(ASSSplitContext *ctx, const char *style)
Find an ASSStyle structure by its name.
static void srt_style_cb(void *priv, char style, int close)
void av_bprint_clear(AVBPrint *buf)
Reset the string to "" but keep internal allocated data.
static void srt_font_name_cb(void *priv, const char *name)
#define ASS_DEFAULT_COLOR
void(* text)(void *priv, const char *text, int len)
static void srt_new_line_cb(void *priv, int forced)
Formatted text, the ass field must be set by the decoder and is authoritative.
#define ASS_DEFAULT_ITALIC
static int srt_stack_find(SRTContext *s, const char c)
static void srt_print(SRTContext *s, const char *str,...)
char * ass
0 terminated ASS/SSA compatible event line.
static void srt_alignment_cb(void *priv, int alignment)
void ff_ass_split_free(ASSSplitContext *ctx)
Free all the memory allocated for an ASSSplitContext.
static void srt_text_cb(void *priv, const char *text, int len)
static float sub(float src0, float src1)
static void srt_end_cb(void *priv)
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
int underline
whether text is underlined (1) or not (0)
static void srt_stack_push_pop(SRTContext *s, const char c, int close)
static const ASSCodesCallbacks text_callbacks
uint8_t * subtitle_header
Header containing style information for text subtitles.