35 for (i = 0; i < p->
buf_size - 3; i+=32) {
36 if (p->
buf[i] != p->
buf[i+2] || p->
buf[i+1] != p->
buf[i+3])
38 if (p->
buf[i] != last)
92 .extensions =
"adp,dtk",
static int adp_read_packet(AVFormatContext *s, AVPacket *pkt)
int64_t avio_size(AVIOContext *s)
Get the filesize.
AVInputFormat ff_adp_demuxer
static int adp_read_header(AVFormatContext *s)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
#define AV_CH_LAYOUT_STEREO
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
#define AVERROR_EOF
End of file.
uint64_t channel_layout
Audio only.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
static int adp_probe(const AVProbeData *p)
enum AVMediaType codec_type
General type of the encoded data.
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters in...
This document is a tutorial initiation for writing simple filters in libavfilter libavfilter is which means that it is highly recommended that you submit your filters to the FFmpeg development mailing list and make sure that they are applied your filters are likely to have a very short lifetime due to more or less regular internal API changes
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.
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
audio channel layout utility functions
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
AVIOContext * pb
I/O context.
This structure contains the data a format has to probe a file.
int64_t duration
Decoding: duration of the stream, in stream time base.
int sample_rate
Audio only.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
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
This structure stores compressed data.