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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;
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;
414 if (
s->nb_streams == 0) {
512 if (
s->nb_streams < 1) {
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;
582 if (
s->nb_streams > 0)
583 st[
s->streams[0]->id] =
s->streams[0];
584 if (
s->nb_streams > 1)
585 st[
s->streams[1]->id] =
s->streams[1];
595 for (
i = 0;
i <
FFMIN(8, vsize);
i++)
606 if (asize && st[
NSV_ST_AUDIO]->codecpar->codec_tag ==
MKTAG(
'P',
'C',
'M',
' ')) {
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'))
724 int offset =
i + 23 + asize + vsize + 1;
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
static int nsv_read_chunk(AVFormatContext *s, int fill_header)
uint32_t * nsvs_timestamps
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
AVInputFormat ff_nsv_demuxer
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
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
enum AVMediaType codec_type
General type of the encoded data.
#define MKTAG(a, b, c, d)
static int nsv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
int buf_size
Size of buf except extra allocated bytes.
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
static int nsv_parse_NSVs_header(AVFormatContext *s)
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
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 av_cold int read_close(AVFormatContext *ctx)
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
int64_t duration
Decoding: duration of the stream, in stream time base.
unsigned int avio_rl16(AVIOContext *s)
static int nsv_read_header(AVFormatContext *s)
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
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.
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
enum AVStreamParseType need_parsing
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
AVCodecParameters * codecpar
Codec parameters associated with this stream.
static int read_header(FFV1Context *f)
Rational number (pair of numerator and denominator).
This structure contains the data a format has to probe a file.
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
int sample_rate
Audio only.
unsigned int avio_rl32(AVIOContext *s)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
#define MKBETAG(a, b, c, d)
static const AVCodecTag nsv_codec_video_tags[]
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_RL24
static int nsv_read_packet(AVFormatContext *s, AVPacket *pkt)
static int nsv_probe(const AVProbeData *p)
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
int avio_r8(AVIOContext *s)
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
int flags
A combination of AV_PKT_FLAG values.
static int nsv_resync(AVFormatContext *s)
#define av_malloc_array(a, b)
static int nsv_parse_NSVf_header(AVFormatContext *s)
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 default value
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
int id
Format-specific stream ID.
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
int index
stream index in AVFormatContext
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
int bits_per_coded_sample
The number of bits per sample in the codedwords.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
This structure stores compressed data.
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
#define flags(name, subs,...)
static const AVCodecTag nsv_codec_audio_tags[]
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
#define NSV_MAX_RESYNC_TRIES
static int nsv_read_close(AVFormatContext *s)
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
uint32_t * nsvs_file_offset
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.