FFmpeg
libaribb24.c
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1 /*
2  * ARIB STD-B24 caption decoder using the libaribb24 library
3  * Copyright (c) 2019 Jan Ekström
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "avcodec.h"
23 #include "libavcodec/ass.h"
24 #include "libavutil/log.h"
25 #include "libavutil/opt.h"
26 
27 #include <aribb24/aribb24.h>
28 #include <aribb24/parser.h>
29 #include <aribb24/decoder.h>
30 
31 typedef struct Libaribb24Context {
32  AVClass *class;
33 
34  arib_instance_t *lib_instance;
35  arib_parser_t *parser;
36  arib_decoder_t *decoder;
37 
39 
41  unsigned int aribb24_skip_ruby;
43 
44 static unsigned int get_profile_font_size(int profile)
45 {
46  switch (profile) {
48  return 36;
50  return 18;
51  default:
52  return 0;
53  }
54 }
55 
56 static void libaribb24_log(void *p, const char *msg)
57 {
58  av_log((AVCodecContext *)p, AV_LOG_INFO, "%s\n", msg);
59 }
60 
62 {
63  unsigned int plane_width = 0;
64  unsigned int plane_height = 0;
65  unsigned int font_size = 0;
66 
67  switch (avctx->profile) {
69  plane_width = 960;
70  plane_height = 540;
71  font_size = get_profile_font_size(avctx->profile);
72  break;
74  plane_width = 320;
75  plane_height = 180;
76  font_size = get_profile_font_size(avctx->profile);
77  break;
78  default:
79  av_log(avctx, AV_LOG_ERROR, "Unknown or unsupported profile set!\n");
80  return AVERROR(EINVAL);
81  }
82 
84  "[Script Info]\r\n"
85  "; Script generated by FFmpeg/Lavc%s\r\n"
86  "ScriptType: v4.00+\r\n"
87  "PlayResX: %d\r\n"
88  "PlayResY: %d\r\n"
89  "\r\n"
90  "[V4+ Styles]\r\n"
91 
92  /* ASSv4 header */
93  "Format: Name, "
94  "Fontname, Fontsize, "
95  "PrimaryColour, SecondaryColour, OutlineColour, BackColour, "
96  "Bold, Italic, Underline, StrikeOut, "
97  "ScaleX, ScaleY, "
98  "Spacing, Angle, "
99  "BorderStyle, Outline, Shadow, "
100  "Alignment, MarginL, MarginR, MarginV, "
101  "Encoding\r\n"
102 
103  "Style: "
104  "Default," /* Name */
105  "%s,%d," /* Font{name,size} */
106  "&H%x,&H%x,&H%x,&H%x," /* {Primary,Secondary,Outline,Back}Colour */
107  "%d,%d,%d,0," /* Bold, Italic, Underline, StrikeOut */
108  "100,100," /* Scale{X,Y} */
109  "0,0," /* Spacing, Angle */
110  "%d,1,0," /* BorderStyle, Outline, Shadow */
111  "%d,10,10,10," /* Alignment, Margin[LRV] */
112  "0\r\n" /* Encoding */
113 
114  "\r\n"
115  "[Events]\r\n"
116  "Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text\r\n",
118  plane_width, plane_height,
123 
124  if (!avctx->subtitle_header)
125  return AVERROR(ENOMEM);
126 
127  avctx->subtitle_header_size = strlen(avctx->subtitle_header);
128 
129  return 0;
130 }
131 
132 static int libaribb24_init(AVCodecContext *avctx)
133 {
134  Libaribb24Context *b24 = avctx->priv_data;
135  void(* arib_dec_init)(arib_decoder_t* decoder) = NULL;
136  int ret_code = AVERROR_EXTERNAL;
137 
138  if (!(b24->lib_instance = arib_instance_new(avctx))) {
139  av_log(avctx, AV_LOG_ERROR, "Failed to initialize libaribb24!\n");
140  goto init_fail;
141  }
142 
143  if (b24->aribb24_base_path) {
144  av_log(avctx, AV_LOG_INFO, "Setting the libaribb24 base path to '%s'\n",
145  b24->aribb24_base_path);
146  arib_set_base_path(b24->lib_instance, b24->aribb24_base_path);
147  }
148 
149  arib_register_messages_callback(b24->lib_instance, libaribb24_log);
150 
151  if (!(b24->parser = arib_get_parser(b24->lib_instance))) {
152  av_log(avctx, AV_LOG_ERROR, "Failed to initialize libaribb24 PES parser!\n");
153  goto init_fail;
154  }
155  if (!(b24->decoder = arib_get_decoder(b24->lib_instance))) {
156  av_log(avctx, AV_LOG_ERROR, "Failed to initialize libaribb24 decoder!\n");
157  goto init_fail;
158  }
159 
160  switch (avctx->profile) {
162  arib_dec_init = arib_initialize_decoder_a_profile;
163  break;
165  arib_dec_init = arib_initialize_decoder_c_profile;
166  break;
167  default:
168  av_log(avctx, AV_LOG_ERROR, "Unknown or unsupported profile set!\n");
169  ret_code = AVERROR(EINVAL);
170  goto init_fail;
171  }
172 
173  arib_dec_init(b24->decoder);
174 
175  if (libaribb24_generate_ass_header(avctx) < 0) {
176  ret_code = AVERROR(ENOMEM);
177  goto init_fail;
178  }
179 
180  return 0;
181 
182 init_fail:
183  if (b24->decoder)
184  arib_finalize_decoder(b24->decoder);
185 
186  if (b24->lib_instance)
187  arib_instance_destroy(b24->lib_instance);
188 
189  return ret_code;
190 }
191 
193 {
194  Libaribb24Context *b24 = avctx->priv_data;
195 
196  if (b24->decoder)
197  arib_finalize_decoder(b24->decoder);
198 
199  if (b24->lib_instance)
200  arib_instance_destroy(b24->lib_instance);
201 
202  return 0;
203 }
204 
205 #define RGB_TO_BGR(c) (((c) & 0xff) << 16 | ((c) & 0xff00) | (((c) >> 16) & 0xff))
206 
208 {
209  Libaribb24Context *b24 = avctx->priv_data;
210  const arib_buf_region_t *region = arib_decoder_get_regions(b24->decoder);
211  unsigned int profile_font_size = get_profile_font_size(avctx->profile);
212  AVBPrint buf = { 0 };
213  int ret = 0;
214 
216 
217  while (region) {
218  ptrdiff_t region_length = region->p_end - region->p_start;
219  unsigned int ruby_region =
220  region->i_fontheight == (profile_font_size / 2);
221 
222  // ASS requires us to make the colors BGR, so we convert here
223  int foreground_bgr_color = RGB_TO_BGR(region->i_foreground_color);
224  int background_bgr_color = RGB_TO_BGR(region->i_background_color);
225 
226  if (region_length < 0) {
227  av_log(avctx, AV_LOG_ERROR, "Invalid negative region length!\n");
229  break;
230  }
231 
232  if (region_length == 0 || (ruby_region && b24->aribb24_skip_ruby)) {
233  goto next_region;
234  }
235 
236  // color and alpha
237  if (foreground_bgr_color != ASS_DEFAULT_COLOR)
238  av_bprintf(&buf, "{\\1c&H%06x&}", foreground_bgr_color);
239 
240  if (region->i_foreground_alpha != 0)
241  av_bprintf(&buf, "{\\1a&H%02x&}", region->i_foreground_alpha);
242 
243  if (background_bgr_color != ASS_DEFAULT_BACK_COLOR)
244  av_bprintf(&buf, "{\\3c&H%06x&}", background_bgr_color);
245 
246  if (region->i_background_alpha != 0)
247  av_bprintf(&buf, "{\\3a&H%02x&}", region->i_background_alpha);
248 
249  // font size
250  if (region->i_fontwidth != profile_font_size ||
251  region->i_fontheight != profile_font_size) {
252  av_bprintf(&buf, "{\\fscx%"PRId64"\\fscy%"PRId64"}",
253  av_rescale(region->i_fontwidth, 100,
254  profile_font_size),
255  av_rescale(region->i_fontheight, 100,
256  profile_font_size));
257  }
258 
259  // TODO: positioning
260 
261  av_bprint_append_data(&buf, region->p_start, region_length);
262 
263  av_bprintf(&buf, "{\\r}");
264 
265 next_region:
266  region = region->p_next;
267  }
268 
269  if (!av_bprint_is_complete(&buf))
270  ret = AVERROR(ENOMEM);
271 
272  if (ret == 0) {
273  av_log(avctx, AV_LOG_DEBUG, "Styled ASS line: %s\n",
274  buf.str);
275 
276  ret = ff_ass_add_rect(sub, buf.str, b24->read_order++,
277  0, NULL, NULL);
278  }
279 
280  av_bprint_finalize(&buf, NULL);
281 
282  return ret;
283 }
284 
285 static int libaribb24_decode(AVCodecContext *avctx, void *data, int *got_sub_ptr, AVPacket *pkt)
286 {
287  Libaribb24Context *b24 = avctx->priv_data;
288  AVSubtitle *sub = data;
289  size_t parsed_data_size = 0;
290  size_t decoded_subtitle_size = 0;
291  const unsigned char *parsed_data = NULL;
292  char *decoded_subtitle = NULL;
293  time_t subtitle_duration = 0;
294  int ret = 0;
295 
296  if (pkt->size <= 0)
297  return pkt->size;
298 
299  arib_parse_pes(b24->parser, pkt->data, pkt->size);
300 
301  parsed_data = arib_parser_get_data(b24->parser,
302  &parsed_data_size);
303  if (!parsed_data || !parsed_data_size) {
304  av_log(avctx, AV_LOG_DEBUG, "No decode'able data was received from "
305  "packet (dts: %"PRId64", pts: %"PRId64").\n",
306  pkt->dts, pkt->pts);
307  return pkt->size;
308  }
309 
310  decoded_subtitle_size = parsed_data_size * 4;
311  if (!(decoded_subtitle = av_mallocz(decoded_subtitle_size + 1))) {
312  av_log(avctx, AV_LOG_ERROR,
313  "Failed to allocate buffer for decoded subtitle!\n");
314  return AVERROR(ENOMEM);
315  }
316 
317  decoded_subtitle_size = arib_decode_buffer(b24->decoder,
318  parsed_data,
319  parsed_data_size,
320  decoded_subtitle,
321  decoded_subtitle_size);
322 
323  subtitle_duration = arib_decoder_get_time(b24->decoder);
324 
325  if (avctx->pkt_timebase.num && pkt->pts != AV_NOPTS_VALUE)
326  sub->pts = av_rescale_q(pkt->pts,
327  avctx->pkt_timebase, AV_TIME_BASE_Q);
328 
329  sub->end_display_time = subtitle_duration ?
330  av_rescale_q(subtitle_duration,
332  (AVRational){1, 1000}) :
333  UINT32_MAX;
334 
335  av_log(avctx, AV_LOG_DEBUG,
336  "Result: '%s' (size: %zu, pkt_pts: %"PRId64", sub_pts: %"PRId64" "
337  "duration: %"PRIu32", pkt_timebase: %d/%d, time_base: %d/%d')\n",
338  decoded_subtitle ? decoded_subtitle : "<no subtitle>",
339  decoded_subtitle_size,
340  pkt->pts, sub->pts,
341  sub->end_display_time,
342  avctx->pkt_timebase.num, avctx->pkt_timebase.den,
343  avctx->time_base.num, avctx->time_base.den);
344 
345  if (decoded_subtitle)
347 
348  *got_sub_ptr = sub->num_rects > 0;
349 
350  av_free(decoded_subtitle);
351 
352  // flush the region buffers, otherwise the linked list keeps getting
353  // longer and longer...
354  arib_finalize_decoder(b24->decoder);
355 
356  return ret < 0 ? ret : pkt->size;
357 }
358 
359 static void libaribb24_flush(AVCodecContext *avctx)
360 {
361  Libaribb24Context *b24 = avctx->priv_data;
362  if (!(avctx->flags2 & AV_CODEC_FLAG2_RO_FLUSH_NOOP))
363  b24->read_order = 0;
364 }
365 
366 #define OFFSET(x) offsetof(Libaribb24Context, x)
367 #define SD AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_DECODING_PARAM
368 static const AVOption options[] = {
369  { "aribb24-base-path", "set the base path for the libaribb24 library",
370  OFFSET(aribb24_base_path), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, SD },
371  { "aribb24-skip-ruby-text", "skip ruby text blocks during decoding",
372  OFFSET(aribb24_skip_ruby), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, SD },
373  { NULL }
374 };
375 
376 static const AVClass aribb24_class = {
377  .class_name = "libaribb24 decoder",
378  .item_name = av_default_item_name,
379  .option = options,
380  .version = LIBAVUTIL_VERSION_INT,
381 };
382 
384  .name = "libaribb24",
385  .long_name = NULL_IF_CONFIG_SMALL("libaribb24 ARIB STD-B24 caption decoder"),
386  .type = AVMEDIA_TYPE_SUBTITLE,
388  .priv_data_size = sizeof(Libaribb24Context),
390  .close = libaribb24_close,
393  .priv_class= &aribb24_class,
394  .wrapper_name = "libaribb24",
395 };
LIBAVCODEC_VERSION
#define LIBAVCODEC_VERSION
Definition: version.h:37
AVSubtitle
Definition: avcodec.h:2393
AVCodec
AVCodec.
Definition: codec.h:197
libaribb24_decode
static int libaribb24_decode(AVCodecContext *avctx, void *data, int *got_sub_ptr, AVPacket *pkt)
Definition: libaribb24.c:285
AVMEDIA_TYPE_SUBTITLE
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
AV_BPRINT_SIZE_UNLIMITED
#define AV_BPRINT_SIZE_UNLIMITED
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
AVERROR
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
opt.h
av_bprint_finalize
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
av_bprint_init
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
sub
static float sub(float src0, float src1)
Definition: dnn_backend_native_layer_mathbinary.c:32
Libaribb24Context::lib_instance
arib_instance_t * lib_instance
Definition: libaribb24.c:34
AV_TIME_BASE_Q
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
av_asprintf
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
libaribb24_generate_ass_header
static int libaribb24_generate_ass_header(AVCodecContext *avctx)
Definition: libaribb24.c:61
profile
mfxU16 profile
Definition: qsvenc.c:45
ASS_DEFAULT_ALIGNMENT
#define ASS_DEFAULT_ALIGNMENT
Definition: ass.h:42
ff_ass_add_rect
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.
Definition: ass.c:118
AVPacket::data
uint8_t * data
Definition: packet.h:365
AVOption
AVOption.
Definition: opt.h:248
data
const char data[16]
Definition: mxf.c:142
AVCodecContext::subtitle_header
uint8_t * subtitle_header
Header containing style information for text subtitles.
Definition: avcodec.h:1789
ASS_DEFAULT_BORDERSTYLE
#define ASS_DEFAULT_BORDERSTYLE
Definition: ass.h:43
av_bprint_append_data
void av_bprint_append_data(AVBPrint *buf, const char *data, unsigned size)
Append data to a print buffer.
Definition: bprint.c:158
Libaribb24Context::decoder
arib_decoder_t * decoder
Definition: libaribb24.c:36
get_profile_font_size
static unsigned int get_profile_font_size(int profile)
Definition: libaribb24.c:44
decoder
static const chunk_decoder decoder[8]
Definition: dfa.c:330
RGB_TO_BGR
#define RGB_TO_BGR(c)
Definition: libaribb24.c:205
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:581
SD
#define SD
Definition: libaribb24.c:367
AVRational::num
int num
Numerator.
Definition: rational.h:59
ass.h
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:181
ASS_DEFAULT_FONT
#define ASS_DEFAULT_FONT
Definition: ass.h:35
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
FF_PROFILE_ARIB_PROFILE_C
#define FF_PROFILE_ARIB_PROFILE_C
Definition: avcodec.h:1747
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:202
av_rescale_q
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
AV_CODEC_ID_ARIB_CAPTION
@ AV_CODEC_ID_ARIB_CAPTION
Definition: codec_id.h:544
ASS_DEFAULT_BACK_COLOR
#define ASS_DEFAULT_BACK_COLOR
Definition: ass.h:38
libaribb24_handle_regions
static int libaribb24_handle_regions(AVCodecContext *avctx, AVSubtitle *sub)
Definition: libaribb24.c:207
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
flush
static void flush(AVCodecContext *avctx)
Definition: aacdec_template.c:592
NULL
#define NULL
Definition: coverity.c:32
options
static const AVOption options[]
Definition: libaribb24.c:368
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
AVCodecContext::subtitle_header_size
int subtitle_header_size
Definition: avcodec.h:1790
av_bprint_is_complete
static int av_bprint_is_complete(const AVBPrint *buf)
Test if the print buffer is complete (not truncated).
Definition: bprint.h:185
AVCodecContext::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avcodec.h:624
AVCodecContext::flags2
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:588
ASS_DEFAULT_BOLD
#define ASS_DEFAULT_BOLD
Definition: ass.h:39
AVPacket::size
int size
Definition: packet.h:366
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
Libaribb24Context
Definition: libaribb24.c:31
libaribb24_flush
static void libaribb24_flush(AVCodecContext *avctx)
Definition: libaribb24.c:359
Libaribb24Context::aribb24_base_path
char * aribb24_base_path
Definition: libaribb24.c:40
AVCodecContext::pkt_timebase
AVRational pkt_timebase
Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
Definition: avcodec.h:1830
OFFSET
#define OFFSET(x)
Definition: libaribb24.c:366
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
Libaribb24Context::parser
arib_parser_t * parser
Definition: libaribb24.c:35
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:364
AVERROR_EXTERNAL
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:57
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:192
ASS_DEFAULT_UNDERLINE
#define ASS_DEFAULT_UNDERLINE
Definition: ass.h:41
FF_PROFILE_ARIB_PROFILE_A
#define FF_PROFILE_ARIB_PROFILE_A
Definition: avcodec.h:1746
log.h
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:358
AV_STRINGIFY
#define AV_STRINGIFY(s)
Definition: macros.h:36
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:243
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:204
ASS_DEFAULT_ITALIC
#define ASS_DEFAULT_ITALIC
Definition: ass.h:40
ASS_DEFAULT_COLOR
#define ASS_DEFAULT_COLOR
Definition: ass.h:37
av_rescale
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
avcodec.h
ret
ret
Definition: filter_design.txt:187
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
av_bprintf
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
libaribb24_close
static int libaribb24_close(AVCodecContext *avctx)
Definition: libaribb24.c:192
Libaribb24Context::aribb24_skip_ruby
unsigned int aribb24_skip_ruby
Definition: libaribb24.c:41
AVCodecContext
main external API structure.
Definition: avcodec.h:501
AVRational::den
int den
Denominator.
Definition: rational.h:60
AVCodecContext::profile
int profile
profile
Definition: avcodec.h:1631
libaribb24_log
static void libaribb24_log(void *p, const char *msg)
Definition: libaribb24.c:56
Libaribb24Context::read_order
int read_order
Definition: libaribb24.c:38
ff_libaribb24_decoder
const AVCodec ff_libaribb24_decoder
Definition: libaribb24.c:383
AV_CODEC_FLAG_BITEXACT
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:310
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVPacket
This structure stores compressed data.
Definition: packet.h:342
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:528
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
aribb24_class
static const AVClass aribb24_class
Definition: libaribb24.c:376
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
AV_CODEC_FLAG2_RO_FLUSH_NOOP
#define AV_CODEC_FLAG2_RO_FLUSH_NOOP
Do not reset ASS ReadOrder field on flush (subtitles decoding)
Definition: avcodec.h:365
libaribb24_init
static int libaribb24_init(AVCodecContext *avctx)
Definition: libaribb24.c:132