30 #define TSBASE 10000000 38 const char *ptr = p->
buf;
41 while (ptr < ptr_end) {
44 if (!memcmp(ptr,
"FORMAT=TIME", 11))
46 if (!memcmp(ptr,
"FORMAT=", 7))
60 for (vi = 0; vi < 2; vi++) {
61 long long intval, fracval;
62 int n =
av_sscanf(line,
"%lld%n.%lld%n", &intval, &p1, &fracval, &p2);
63 if (n <= 0 || intval < INT64_MIN / TSBASE || intval > INT64_MAX /
TSBASE)
71 for (;p2 - p1 < 7 + 1; p1--)
73 for (;p2 - p1 > 7 + 1; p1++)
75 if (intval > 0) intval += fracval;
76 else intval -= fracval;
96 int64_t current_pts = 0;
98 int common_factor = 0;
110 line[strcspn(line,
"\r\n")] = 0;
112 if (sscanf(line,
"FORMAT=%d", &fps) == 1 && fps > 3 && fps < 100) {
115 }
else if (
parse_line(line, &start, &duration) >= 0) {
126 if ( current_pts < 0 && start < INT64_MIN - current_pts
127 || current_pts > 0 && start > INT64_MAX - current_pts) {
131 sub->
pts = current_pts + start;
132 if (duration < 0 || sub->
pts > INT64_MAX - duration) {
138 common_factor =
av_gcd(duration, common_factor);
139 common_factor =
av_gcd(sub->
pts, common_factor);
147 if (common_factor > 1) {
148 common_factor =
av_gcd(pts_info.
num, common_factor);
149 for (i = 0; i < mpsub->
q.
nb_subs; i++) {
153 pts_info.
num /= common_factor;
182 int64_t min_ts, int64_t ts, int64_t max_ts,
int flags)
186 min_ts, ts, max_ts, flags);
AVInputFormat ff_mpsub_demuxer
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static int mpsub_probe(const AVProbeData *p)
int64_t pos
byte position in stream, -1 if unknown
void ff_subtitles_read_chunk(AVIOContext *pb, AVBPrint *buf)
Same as ff_subtitles_read_text_chunk(), but read from an AVIOContext.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
void ff_subtitles_queue_clean(FFDemuxSubtitlesQueue *q)
Remove and destroy all the subtitles packets.
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
int ff_subtitles_queue_read_packet(FFDemuxSubtitlesQueue *q, AVPacket *pkt)
Generic read_packet() callback for subtitles demuxers using this queue system.
static av_cold int end(AVCodecContext *avctx)
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
static int mpsub_read_seek(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
GLsizei GLboolean const GLfloat * value
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
static av_cold int read_close(AVFormatContext *ctx)
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
#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)
enum AVMediaType codec_type
General type of the encoded data.
int64_t av_gcd(int64_t a, int64_t b)
Compute the greatest common divisor of two integer operands.
static int mpsub_read_header(AVFormatContext *s)
int av_sscanf(const char *string, const char *format,...)
See libc sscanf manual for more information.
int buf_size
Size of buf except extra allocated bytes.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
static int parse_line(const char *line, int64_t *value, int64_t *value2)
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
static int read_header(FFV1Context *f)
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
int ff_subtitles_queue_seek(FFDemuxSubtitlesQueue *q, AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
Update current_sub_idx to emulate a seek.
AVIOContext * pb
I/O context.
static int mpsub_read_packet(AVFormatContext *s, AVPacket *pkt)
Rational number (pair of numerator and denominator).
static int mpsub_read_close(AVFormatContext *s)
This structure contains the data a format has to probe a file.
#define flags(name, subs,...)
static av_always_inline int ff_subtitles_next_line(const char *ptr)
Get the number of characters to increment to jump to the next line, or to the end of the string...
AVPacket * subs
array of subtitles packets
void * priv_data
Format private data.
static float sub(float src0, float src1)
AVCodecParameters * codecpar
Codec parameters associated with this stream.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
AVPacket * ff_subtitles_queue_insert(FFDemuxSubtitlesQueue *q, const uint8_t *event, size_t len, int merge)
Insert a new subtitle event.
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
This structure stores compressed data.
int nb_subs
number of subtitles packets
void ff_subtitles_queue_finalize(void *log_ctx, FFDemuxSubtitlesQueue *q)
Set missing durations, sort subtitles by PTS (and then byte position), and drop duplicated events...
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...