32 #define STYLE_FLAG_BOLD (1<<0) 33 #define STYLE_FLAG_ITALIC (1<<1) 34 #define STYLE_FLAG_UNDERLINE (1<<2) 36 #define BOX_SIZE_INITIAL 40 38 #define STYL_BOX (1<<0) 39 #define HLIT_BOX (1<<1) 40 #define HCLR_BOX (1<<2) 41 #define TWRP_BOX (1<<3) 44 #define BOTTOM_CENTER 2 45 #define BOTTOM_RIGHT 3 47 #define MIDDLE_CENTER 5 48 #define MIDDLE_RIGHT 6 53 #define RGB_TO_BGR(c) (((c) & 0xff) << 16 | ((c) & 0xff00) | (((c) >> 16) & 0xff)) 143 int8_t v_align, h_align;
144 unsigned ftab_entries;
154 h_align = bytestream_get_byte(&tx3g_ptr);
155 v_align = bytestream_get_byte(&tx3g_ptr);
188 m->
d.
fontID = bytestream_get_be16(&tx3g_ptr);
190 s_default.
style_flag = bytestream_get_byte(&tx3g_ptr);
195 m->
d.
fontsize = bytestream_get_byte(&tx3g_ptr);
197 m->
d.
color = bytestream_get_be24(&tx3g_ptr);
198 m->
d.
alpha = bytestream_get_byte(&tx3g_ptr);
208 ftab_entries = bytestream_get_be16(&tx3g_ptr);
211 remaining -= 3 * ftab_entries;
220 m->
ftab[
i].
fontID = bytestream_get_be16(&tx3g_ptr);
223 font_length = bytestream_get_byte(&tx3g_ptr);
225 remaining -= font_length;
254 m->
h.
hlit_end = bytestream_get_be16(&tsmb);
268 int style_entries = bytestream_get_be16(&tsmb);
286 style->
style_end = bytestream_get_be16(&tsmb);
301 style->
style_flag = bytestream_get_byte(&tsmb);
305 style->
fontsize = bytestream_get_byte(&tsmb);
306 style->
color = bytestream_get_be24(&tsmb);
307 style->
alpha = bytestream_get_byte(&tsmb);
324 const char *start = text;
335 static int text_to_ass(AVBPrint *buf,
const char *text,
const char *text_end,
344 if (text < text_end && m->box_flags &
TWRP_BOX) {
352 while (text < text_end) {
363 if (entry < m->style_entries && text_pos == style->
style_start) {
378 color = style->
color;
397 av_bprintf(buf,
"{\\1c&H000000&}{\\2c&HFFFFFF&}");
467 char *ptr = avpkt->
data;
469 int text_length, tsmb_type, ret_tsmb;
474 if (!ptr || avpkt->
size < 2)
484 if (avpkt->
size == 2)
493 end = ptr +
FFMIN(2 + text_length, avpkt->
size);
504 if (text_length + 2 != avpkt->
size) {
513 if (tsmb_size == 1) {
523 if (tsmb_size == 0) {
532 if (tsmb_type == box_types[i].
type) {
535 ret_tsmb = box_types[
i].
decode(tsmb, m, avpkt);
570 #define OFFSET(x) offsetof(MovTextContext, x) 571 #define FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_SUBTITLE_PARAM 574 {
"height",
"Frame height, usually video height",
OFFSET(frame_height),
AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
591 .priv_class = &mov_text_decoder_class,
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
void av_bprintf(AVBPrint *buf, const char *fmt,...)
static const size_t box_count
#define GET_UTF8(val, GET_BYTE, ERROR)
Convert a UTF-8 character (up to 4 bytes) to its 32-bit UCS-4 encoded form.
static int decode_twrp(const uint8_t *tsmb, MovTextContext *m, AVPacket *avpkt)
ptrdiff_t const GLvoid * data
static void flush(AVCodecContext *avctx)
#define ASS_DEFAULT_BORDERSTYLE
static const AVOption options[]
#define LIBAVUTIL_VERSION_INT
Memory handling functions.
static av_cold int init(AVCodecContext *avctx)
const char * av_default_item_name(void *ptr)
Return the context name.
int ff_ass_add_rect(AVSubtitle *sub, const char *dialog, int readorder, int layer, const char *style, const char *speaker)
Add an ASS dialog to a subtitle.
static void error(const char *err)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
int ff_ass_subtitle_header_full(AVCodecContext *avctx, int play_res_x, int play_res_y, const char *font, int font_size, int primary_color, int secondary_color, int outline_color, int back_color, int bold, int italic, int underline, int border_style, int alignment)
Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS.
static av_cold int end(AVCodecContext *avctx)
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 ff_ass_subtitle_header_default(AVCodecContext *avctx)
Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS with default style.
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
void av_bprint_append_data(AVBPrint *buf, const char *data, unsigned size)
Append data to a print buffer.
static int get_utf8_length_at(const char *text, const char *text_end)
static int mov_text_init(AVCodecContext *avctx)
static void mov_text_cleanup(MovTextContext *m)
#define AV_CODEC_FLAG2_RO_FLUSH_NOOP
Do not reset ASS ReadOrder field on flush (subtitles decoding)
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
#define STYLE_FLAG_UNDERLINE
#define ASS_DEFAULT_PLAYRESY
static const AVClass mov_text_decoder_class
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define AV_BPRINT_SIZE_UNLIMITED
static const Box box_types[]
#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)
static int text_to_ass(AVBPrint *buf, const char *text, const char *text_end, AVCodecContext *avctx)
const char * name
Name of the codec implementation.
static void mov_text_flush(AVCodecContext *avctx)
#define STYLE_FLAG_ITALIC
static av_always_inline unsigned int bytestream_get_buffer(const uint8_t **b, uint8_t *dst, unsigned int size)
#define FF_ARRAY_ELEMS(a)
static int decode_hlit(const uint8_t *tsmb, MovTextContext *m, AVPacket *avpkt)
int(* decode)(const uint8_t *tsmb, MovTextContext *m, AVPacket *avpkt)
Libavcodec external API header.
main external API structure.
Describe the class of an AVClass context structure.
static int decode_hclr(const uint8_t *tsmb, MovTextContext *m, AVPacket *avpkt)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
common internal and external API header
static int decode_styl(const uint8_t *tsmb, MovTextContext *m, AVPacket *avpkt)
static int mov_text_decode_close(AVCodecContext *avctx)
AVCodec ff_movtext_decoder
#define MKBETAG(a, b, c, d)
static void mov_text_cleanup_ftab(MovTextContext *m)
int flags2
AV_CODEC_FLAG2_*.
static float sub(float src0, float src1)
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
static int mov_text_decode_frame(AVCodecContext *avctx, void *data, int *got_sub_ptr, AVPacket *avpkt)
#define ASS_DEFAULT_PLAYRESX
This structure stores compressed data.
static int mov_text_tx3g(AVCodecContext *avctx, MovTextContext *m)