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36 #define JV_PREAMBLE_SIZE 5
55 #define MAGIC " Compression by John M Phillips Copyright (C) 1995 The Bitmap Brothers Ltd."
158 jv->
state = JV_AUDIO;
212 jv->
state = JV_AUDIO;
217 if (
s->pb->eof_reached)
234 switch (stream_index) {
250 jv->
state = JV_AUDIO;
#define AV_LOG_WARNING
Something somehow does not look correct.
#define AV_EF_EXPLODE
abort decoding on minor error detection
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
enum AVMediaType codec_type
General type of the encoded data.
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
#define AVERROR_EOF
End of file.
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
int buf_size
Size of buf except extra allocated bytes.
int video_size
video packet size (bytes)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
int64_t duration
Decoding: duration of the stream, in stream time base.
unsigned int avio_rl16(AVIOContext *s)
int audio_size
audio packet size (bytes)
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
enum JVDemuxContext::@387 state
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
#define FF_INFMT_FLAG_INIT_CLEANUP
For an FFInputFormat with this flag set read_close() needs to be called by the caller upon read_heade...
AVCodecParameters * codecpar
Codec parameters associated with this stream.
This structure contains the data a format has to probe a file.
AVChannelLayout ch_layout
Audio only.
int sample_rate
Audio only.
int64_t nb_frames
number of frames in this stream if known or 0
unsigned int avio_rl32(AVIOContext *s)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
An AVChannelLayout holds information about the channel layout of audio data.
#define AV_NOPTS_VALUE
Undefined timestamp value.
int avio_r8(AVIOContext *s)
uint8_t video_type
per-frame video compression type
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.
#define i(width, name, range_min, range_max)
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
#define AV_INPUT_BUFFER_PADDING_SIZE
uint16_t palette_size
palette size (bytes)
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.
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
#define AV_CHANNEL_LAYOUT_MONO
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
This structure stores compressed data.
#define flags(name, subs,...)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.