34 #define NSV_MAX_RESYNC (500*1024) 35 #define NSV_MAX_RESYNC_TRIES 300 90 uint32_t info_strings_size;
91 uint32_t table_entries;
92 uint32_t table_entries_used;
105 struct nsv_avchunk_header {
107 uint16_t vchunk_size_msb;
108 uint16_t achunk_size;
111 struct nsv_pcm_header {
126 #define T_NSVF MKTAG('N', 'S', 'V', 'f') 127 #define T_NSVS MKTAG('N', 'S', 'V', 's') 128 #define T_TOC2 MKTAG('T', 'O', 'C', '2') 129 #define T_NONE MKTAG('N', 'O', 'N', 'E') 130 #define T_SUBT MKTAG('S', 'U', 'B', 'T') 131 #define T_ASYN MKTAG('A', 'S', 'Y', 'N') 132 #define T_KEYF MKTAG('K', 'E', 'Y', 'F') 134 #define TB_NSVF MKBETAG('N', 'S', 'V', 'f') 135 #define TB_NSVS MKBETAG('N', 'S', 'V', 's') 138 #define NSV_ST_VIDEO 0 139 #define NSV_ST_AUDIO 1 140 #define NSV_ST_SUBT 2 236 if ((v & 0x0000ffff) == 0xefbe) {
247 if (v ==
MKBETAG(
'N',
'S',
'V',
's')) {
267 int table_entries_used;
293 av_log(s,
AV_LOG_TRACE,
"NSV NSVf info-strings size: %d, table entries: %d, bis %d\n",
294 strings_size, table_entries, table_entries_used);
300 if (strings_size > 0) {
306 p = strings =
av_mallocz((
size_t)strings_size + 1);
309 endp = strings + strings_size;
318 if (!p || p >= endp-2)
323 p = strchr(p, quote);
337 if (table_entries_used > 0) {
340 if((
unsigned)table_entries_used >= UINT_MAX /
sizeof(uint32_t))
346 for(i=0;i<table_entries_used;i++) {
352 if(table_entries > table_entries_used &&
357 for(i=0;i<table_entries_used;i++) {
378 uint16_t vwidth, vheight;
397 framerate.
num *= 1000;
398 framerate.
den *= 1001;
401 if((i&3)==3) framerate.
num *= 24;
402 else if((i&3)==2) framerate.
num *= 25;
403 else framerate.
num *= 30;
562 vsize = (vsize << 4) | (auxcount >> 4);
564 av_log(s,
AV_LOG_TRACE,
"NSV CHUNK %d aux, %"PRIu32
" bytes video, %d bytes audio\n", auxcount, vsize, asize);
566 for (i = 0; i < auxcount; i++) {
571 vsize -= auxsize +
sizeof(uint16_t) +
sizeof(uint32_t);
576 if (!vsize && !asize) {
578 goto null_chunk_retry;
595 for (i = 0; i <
FFMIN(8, vsize); i++)
599 ((
NSVStream*)st[NSV_ST_VIDEO]->priv_data)->frame_offset++;
606 if (asize && st[NSV_ST_AUDIO]->codecpar->codec_tag ==
MKTAG(
'P',
'C',
'M',
' ')) {
613 if (!channels || !samplerate)
616 av_log(s,
AV_LOG_TRACE,
"NSV RAWAUDIO: bps %d, nchan %d, srate %d\n", bps, channels, samplerate);
629 av_log(s,
AV_LOG_TRACE,
"NSV RAWAUDIO: bps %d, nchan %d, srate %d\n", bps, channels, samplerate);
638 pkt->
dts = (((
NSVStream*)st[NSV_ST_VIDEO]->priv_data)->frame_offset-1);
663 for (i = 0; i < 2; i++) {
712 if (p->
buf[0] ==
'N' && p->
buf[1] ==
'S' &&
713 p->
buf[2] ==
'V' && (p->
buf[3] ==
'f' || p->
buf[3] ==
's'))
719 for (i = 1; i < p->
buf_size - 3; i++) {
724 int offset = i + 23 + asize + vsize + 1;
725 if (offset <= p->buf_size - 2 &&
AV_RL16(p->
buf + offset) == 0xBEEF)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
static const AVCodecTag nsv_codec_video_tags[]
static int nsv_parse_NSVf_header(AVFormatContext *s)
static int nsv_probe(const AVProbeData *p)
uint32_t * nsvs_file_offset
uint32_t * nsvs_timestamps
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int index
stream index in AVFormatContext
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
static const AVCodecTag nsv_codec_audio_tags[]
Macro definitions for various function/variable attributes.
#define NSV_MAX_RESYNC_TRIES
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
enum AVStreamParseType need_parsing
int id
Format-specific stream ID.
GLsizei GLboolean const GLfloat * value
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
AVStream ** streams
A list of all streams in the file.
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
static av_cold int read_close(AVFormatContext *ctx)
static int nsv_resync(AVFormatContext *s)
int av_match_ext(const char *filename, const char *extensions)
Return a positive value if the given filename has one of the given extensions, 0 otherwise.
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
static int nsv_read_close(AVFormatContext *s)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
static int nsv_read_packet(AVFormatContext *s, AVPacket *pkt)
AVDictionary * metadata
Metadata that applies to the whole file.
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
unsigned int avio_rl32(AVIOContext *s)
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
preferred ID for decoding MPEG audio layer 1, 2 or 3
enum AVMediaType codec_type
General type of the encoded data.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_RL24
static int nsv_read_chunk(AVFormatContext *s, int fill_header)
int flags
A combination of AV_PKT_FLAG values.
int avio_r8(AVIOContext *s)
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.
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
AVInputFormat ff_nsv_demuxer
static int nsv_parse_NSVs_header(AVFormatContext *s)
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
static int nsv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
static int read_header(FFV1Context *f)
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
AVStreamInternal * internal
An opaque field for libavformat internal usage.
AVIOContext * pb
I/O context.
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Rational number (pair of numerator and denominator).
This structure contains the data a format has to probe a file.
static int nsv_read_header(AVFormatContext *s)
#define flags(name, subs,...)
int64_t duration
Decoding: duration of the stream, in stream time base.
int sample_rate
Audio only.
unsigned int avio_rl16(AVIOContext *s)
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
#define MKBETAG(a, b, c, d)
void * priv_data
Format private data.
int bits_per_coded_sample
The number of bits per sample in the codedwords.
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
AVCodecParameters * codecpar
Codec parameters associated with this stream.
#define av_malloc_array(a, b)
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
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
#define MKTAG(a, b, c, d)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
This structure stores compressed data.