57 if (!memcmp(p->
buf,
"DAHUA", 5))
60 if (memcmp(p->
buf,
"DHAV", 4))
63 if (p->
buf[4] == 0xf0 ||
72 8000, 4000, 8000, 11025, 16000,
73 20000, 22050, 32000, 44100, 48000,
169 int frame_length, ext_length;
191 if (frame_length < 24)
193 if (dhav->
type == 0xf1) {
195 return ret < 0 ? ret : 0;
208 return frame_length - 8 - (end - start);
213 int year, month, day, hour,
min, sec;
216 min = (date >> 6) & 0x3F;
217 hour = (date >> 12) & 0x1F;
218 day = (date >> 17) & 0x1F;
219 month = (date >> 22) & 0x0F;
220 year = ((date >> 26) & 0x3F) + 2000;
222 timeinfo->tm_year = year - 1900;
223 timeinfo->tm_mon = month - 1;
224 timeinfo->tm_mday = day;
225 timeinfo->tm_hour = hour;
226 timeinfo->tm_min =
min;
227 timeinfo->tm_sec = sec;
234 int64_t start = 0, end = 0;
271 if (!memcmp(signature,
"DAHUA", 5)) {
275 if (!memcmp(signature,
"DHAV", 4)) {
319 dst->
pts = t * 1000LL;
403 if (stream_index < 0) {
415 if (dhav->
type != 0xfc)
time_t av_timegm(struct tm *tm)
Convert the decomposed UTC time in tm to a time_t value.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int64_t avio_size(AVIOContext *s)
Get the filesize.
int64_t pos
byte position in stream, -1 if unknown
#define avpriv_request_sample(...)
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
static int read_chunk(AVFormatContext *s)
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.
#define FF_ARRAY_ELEMS(a)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
static const uint32_t sample_rates[]
int ctx_flags
Flags signalling stream properties.
static const char signature[]
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
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.
#define AVERROR_EOF
End of file.
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
static int dhav_read_header(AVFormatContext *s)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
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. ...
static int dhav_probe(const AVProbeData *p)
preferred ID for decoding MPEG audio layer 1, 2 or 3
enum AVMediaType codec_type
General type of the encoded data.
AVRational avg_frame_rate
Average framerate.
AVInputFormat ff_dhav_demuxer
int flags
A combination of AV_PKT_FLAG values.
int avio_r8(AVIOContext *s)
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.
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
static void get_timeinfo(unsigned date, struct tm *timeinfo)
static int dhav_read_packet(AVFormatContext *s, AVPacket *pkt)
static int read_header(FFV1Context *f)
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
#define AV_LOG_INFO
Standard information.
AVStreamInternal * internal
An opaque field for libavformat internal usage.
AVIOContext * pb
I/O context.
static int dhav_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
This structure contains the data a format has to probe a file.
#define flags(name, subs,...)
static int64_t get_pts(AVFormatContext *s, int stream_index)
int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
Ensures that the requested seekback buffer size will be available.
int64_t duration
Decoding: duration of the stream, in stream time base.
int sample_rate
Audio only.
unsigned int avio_rl16(AVIOContext *s)
static av_always_inline int diff(const uint32_t a, const uint32_t b)
void * priv_data
Format private data.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
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)
This structure stores compressed data.
static int parse_ext(AVFormatContext *s, int length)
static int64_t get_duration(AVFormatContext *s)
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.