35 #define NUT_MAX_STREAMS 256
43 while (len > maxlen) {
49 string[
FFMIN(len, maxlen - 1)] = 0;
80 static inline uint64_t get_v_trace(
AVIOContext *bc,
const char *file,
81 const char *func,
int line)
86 v, v, file, func, line);
90 static inline int64_t get_s_trace(
AVIOContext *bc,
const char *file,
91 const char *func,
int line)
93 int64_t v =
get_s(bc);
96 v, v, file, func, line);
100 #define ffio_read_varlen(bc) get_v_trace(bc, __FILE__, __PRETTY_FUNCTION__, __LINE__)
101 #define get_s(bc) get_s_trace(bc, __FILE__, __PRETTY_FUNCTION__, __LINE__)
105 int calculate_checksum, uint64_t startcode)
134 state = (state << 8) |
avio_r8(bc);
135 if ((state >> 56) !=
'N')
160 if (startcode == code)
162 else if (startcode == 0)
174 code = (code << 8) | p->
buf[i];
181 #define GET_V(dst, check) \
183 tmp = ffio_read_varlen(bc); \
185 av_log(s, AV_LOG_ERROR, "Error " #dst " is (%"PRId64")\n", tmp); \
186 return AVERROR_INVALIDDATA; \
209 unsigned int stream_count;
211 int tmp_stream, tmp_mul, tmp_pts, tmp_size, tmp_res, tmp_head_idx;
246 for (i = 0; i < 256;) {
267 count = tmp_mul - tmp_size;
273 while (tmp_fields-- > 8)
276 if (count == 0 || i + count > 256) {
280 if (tmp_stream >= stream_count) {
285 for (j = 0; j < count; j++, i++) {
329 for (i = 0; i < stream_count; i++)
340 int class, stream_id;
348 stc = &nut->
stream[stream_id];
353 class = ffio_read_varlen(bc);
389 "Unknown codec tag '0x%04x' for stream number %d\n",
390 (
unsigned int) tmp, stream_id);
424 "stream header %d checksum mismatch\n", stream_id);
444 if (stream_id == i || stream_id == -1)
452 uint64_t tmp, chapter_start, chapter_len;
453 unsigned int stream_id_plus1, count;
456 char name[256], str_value[1024], type_str[256];
465 GET_V(stream_id_plus1, tmp <= s->nb_streams);
466 chapter_id =
get_s(bc);
471 if (chapter_id && !stream_id_plus1) {
476 start, start + chapter_len,
NULL);
482 }
else if (stream_id_plus1) {
483 st = s->
streams[stream_id_plus1 - 1];
488 for (i = 0; i < count; i++) {
489 get_str(bc, name,
sizeof(name));
493 get_str(bc, str_value,
sizeof(str_value));
494 }
else if (value == -2) {
495 get_str(bc, type_str,
sizeof(type_str));
497 get_str(bc, str_value,
sizeof(str_value));
498 }
else if (value == -3) {
501 }
else if (value == -4) {
504 }
else if (value < -4) {
516 if (!strcmp(type,
"UTF-8")) {
517 if (chapter_id == 0 && !strcmp(name,
"Disposition")) {
573 int i, j, syncpoint_count;
576 int8_t *has_keyframe;
590 GET_V(syncpoint_count, tmp < INT_MAX / 8 && tmp > 0);
591 syncpoints =
av_malloc(
sizeof(int64_t) * syncpoint_count);
592 has_keyframe =
av_malloc(
sizeof(int8_t) * (syncpoint_count + 1));
593 for (i = 0; i < syncpoint_count; i++) {
595 if (syncpoints[i] <= 0)
598 syncpoints[i] += syncpoints[i - 1];
602 int64_t last_pts = -1;
603 for (j = 0; j < syncpoint_count;) {
611 if (n + x >= syncpoint_count + 1) {
616 has_keyframe[n++] = flag;
617 has_keyframe[n++] = !flag;
620 if (n >= syncpoint_count + 1) {
624 has_keyframe[n++] = x & 1;
628 if (has_keyframe[0]) {
632 assert(n <= syncpoint_count + 1);
633 for (; j < n && j < syncpoint_count; j++) {
634 if (has_keyframe[j]) {
681 int initialized_stream_count;
697 for (initialized_stream_count = 0; initialized_stream_count < s->
nb_streams;) {
704 initialized_stream_count++;
713 if (startcode == 0) {
746 uint8_t *header_idx,
int frame_code)
751 int size,
flags, size_mul, pts_delta, i, reserved_count;
756 "Last frame must have been damaged %"PRId64
" > %"PRId64
" + %d\n",
774 GET_V(*stream_id, tmp < s->nb_streams);
776 stc = &nut->
stream[*stream_id];
794 for (i = 0; i < reserved_count; i++)
823 int size, stream_id, discard;
824 int64_t pts, last_IP_pts;
832 stc = &nut->
stream[stream_id];
841 last_IP_pts > pts) ||
865 int i, frame_code = 0, ret, skip;
866 int64_t ts, back_ptr;
879 if (frame_code ==
'N') {
881 for (i = 1; i < 8; i++)
882 tmp = (tmp << 8) +
avio_r8(bc);
919 int64_t *pos_arg, int64_t pos_limit)
923 int64_t pos, pts, back_ptr;
925 stream_index, *pos_arg, pos_limit);
940 if (stream_index == -1)
942 else if (stream_index == -2)
949 int64_t pts,
int flags)
955 Syncpoint *sp, *next_node[2] = { &nopts_sp, &nopts_sp };
956 int64_t pos, pos2, ts;
968 (
void **) next_node);
970 next_node[0]->pos, next_node[1]->pos, next_node[0]->ts,
973 next_node[1]->
pos, next_node[1]->
pos,
974 next_node[0]->
ts, next_node[1]->
ts,
978 dummy.
pos = pos + 16;
979 next_node[1] = &nopts_sp;
981 (
void **) next_node);
983 next_node[1]->
pos, next_node[1]->
pos,
1001 if (pos2 > pos || pos2 + 15 < pos)
1018 .extensions =
"nut",
uint64_t ffio_read_varlen(AVIOContext *bc)
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
discard all frames except keyframes
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int64_t avio_size(AVIOContext *s)
Get the filesize.
int64_t last_syncpoint_pos
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.
int64_t pos
byte position in stream, -1 if unknown
static int get_str(AVIOContext *bc, char *string, unsigned int maxlen)
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
static void set_disposition_bits(AVFormatContext *avf, char *value, int stream_id)
int64_t data_offset
offset of the first packet
static int decode_main_header(NUTContext *nut)
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
const uint8_t * header[128]
static int decode_frame_header(NUTContext *nut, int64_t *pts, int *stream_id, uint8_t *header_idx, int frame_code)
if set, reserved_count is coded in the frame header
static int64_t nut_read_timestamp(AVFormatContext *s, int stream_index, int64_t *pos_arg, int64_t pos_limit)
void * av_tree_find(const AVTreeNode *t, void *key, int(*cmp)(void *key, const void *b), void *next[2])
Opaque data information usually continuous.
static int nut_probe(AVProbeData *p)
enum AVCodecID av_codec_get_id(const struct AVCodecTag *const *tags, unsigned int tag)
Get the AVCodecID for the given codec tag tag.
unsigned int avio_rb32(AVIOContext *s)
if set, coded_pts is in the frame header
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
AVStream ** streams
A list of all streams in the file.
If set, match_time_delta is coded in the frame header.
const AVMetadataConv ff_nut_metadata_conv[]
static double av_q2d(AVRational a)
Convert rational to double.
static int decode_frame(NUTContext *nut, AVPacket *pkt, int frame_code)
#define AVERROR_EOF
End of file.
static av_cold int read_close(AVFormatContext *ctx)
const AVCodecTag ff_nut_data_tags[]
uint64_t avio_rb64(AVIOContext *s)
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b)
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.
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
AVDictionary * metadata
Metadata that applies to the whole file.
int has_b_frames
Size of the frame reordering buffer in the decoder.
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
void ff_nut_free_sp(NUTContext *nut)
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)
discard all bidirectional frames
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
int64_t av_gcd(int64_t a, int64_t b)
Return the greatest common divisor of a and b.
void av_log(void *avcl, int level, const char *fmt,...)
AVStream * avformat_new_stream(AVFormatContext *s, AVCodec *c)
Add a new stream to a media file.
static int nut_read_packet(AVFormatContext *s, AVPacket *pkt)
const AVCodecTag ff_nut_audio_tags[]
static int decode_stream_header(NUTContext *nut)
const AVCodecTag ff_codec_wav_tags[]
if set, frame is keyframe
int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b)
int flags
A combination of AV_PKT_FLAG values.
int avio_r8(AVIOContext *s)
AVCodecContext * codec
Codec context associated with this stream.
static int nut_read_close(AVFormatContext *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.
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
void ffio_init_checksum(AVIOContext *s, unsigned long(*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len), unsigned long checksum)
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val)
#define AV_TIME_BASE
Internal time base represented as integer.
const AVCodecTag ff_codec_bmp_tags[]
int av_strcasecmp(const char *a, const char *b)
int width
picture width / height.
static uint64_t find_any_startcode(AVIOContext *bc, int64_t pos)
unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf, unsigned int len)
static int find_and_decode_index(NUTContext *nut)
static av_always_inline int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
int64_t ff_lsb2full(StreamContext *stream, int64_t lsb)
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
if set, frame_code is invalid
static uint64_t get_fourcc(AVIOContext *bc)
static int get_packetheader(NUTContext *nut, AVIOContext *bc, int calculate_checksum, uint64_t startcode)
struct AVTreeNode * syncpoints
if set, data_size_msb is at frame header, otherwise data_size_msb is 0
static int nut_read_header(AVFormatContext *s)
if set, the frame header contains a checksum
static int read_header(FFV1Context *f)
if(ac->has_optimized_func)
static int decode_syncpoint(NUTContext *nut, int64_t *ts, int64_t *back_ptr)
#define AV_LOG_INFO
Standard information.
enum AVMediaType codec_type
const AVCodecTag ff_nut_subtitle_tags[]
int sample_rate
samples per second
AVIOContext * pb
I/O context.
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
if set, coded_flags are stored in the frame header
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
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 GET_V(dst, check)
rational number numerator/denominator
unsigned long ffio_get_checksum(AVIOContext *s)
static int skip_reserved(AVIOContext *bc, int64_t pos)
static int64_t find_startcode(AVIOContext *bc, uint64_t code, int64_t pos)
Find the given startcode.
This structure contains the data a format has to probe a file.
static int read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
const Dispositions ff_nut_dispositions[]
unsigned int avio_rl16(AVIOContext *s)
uint64_t next_startcode
stores the next startcode if it has already been parsed but the stream is not seekable ...
static int decode_info_header(NUTContext *nut)
FrameCode frame_code[256]
int disposition
AV_DISPOSITION_* bit field.
const AVCodecTag ff_nut_video_tags[]
int ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts)
#define SYNCPOINT_STARTCODE
int eof_reached
true if eof reached
If set, header_idx is coded in the frame header.
AVInputFormat ff_nut_demuxer
int channels
number of audio channels
static int64_t get_s(AVIOContext *bc)
void * priv_data
Format private data.
if set, stream_id is coded in the frame header
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
const AVCodecTag *const ff_nut_codec_tags[]
This structure stores compressed data.
unsigned int time_base_count
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
#define AV_NOPTS_VALUE
Undefined timestamp value.
unsigned int max_distance