30 if (memcmp(p->
buf,
"FSB", 3) || p->
buf[3] -
'0' < 1 || p->
buf[3] -
'0' > 5)
48 if (version != 4 && version != 3) {
75 if (format & 0x00000100) {
78 }
else if (format & 0x00400000) {
82 }
else if (format & 0x00800000) {
85 }
else if (format & 0x02000000) {
94 for (c = 0; c < par->
channels; c++) {
102 }
else if (version == 4) {
147 for (c = 0; c < par->
channels; c++) {
183 for (i = 0; i < 4; i++) {
184 for (ch = 0; ch < par->
channels; ch++) {
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int64_t pos
byte position in stream, -1 if unknown
#define avpriv_request_sample(...)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
AVFormatInternal * internal
An opaque field for libavformat internal usage.
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
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 format(the sample packing is implied by the sample format) and sample rate.The lists are not just lists
This struct describes the properties of an encoded stream.
#define av_assert0(cond)
assert() equivalent, that is always enabled.
unsigned int avio_rb32(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
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
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.
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
unsigned int avio_rl32(AVIOContext *s)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
enum AVMediaType codec_type
General type of the encoded data.
simple assert() macros that are a bit more flexible than ISO C assert().
static int fsb_probe(const AVProbeData *p)
int avio_r8(AVIOContext *s)
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
int block_align
Audio only.
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
AVIOContext * pb
I/O context.
static int fsb_read_packet(AVFormatContext *s, AVPacket *pkt)
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.
unsigned int avio_rl16(AVIOContext *s)
static int fsb_read_header(AVFormatContext *s)
int bits_per_coded_sample
The number of bits per sample in the codedwords.
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
AVInputFormat ff_fsb_demuxer
AVCodecParameters * codecpar
Codec parameters associated with this stream.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
This structure stores compressed data.