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68 s->samples < UINT32_MAX) {
82 .mime_type =
"audio/x-wavpack",
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
AVStream ** streams
A list of all streams in the file.
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static av_cold int wv_write_trailer(AVFormatContext *ctx)
int ff_ape_write_tag(AVFormatContext *s)
Write an APE tag into a file.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
static int write_trailer(AVFormatContext *s1)
AVIOContext * pb
I/O context.
static av_cold int wv_init(AVFormatContext *ctx)
int ff_wv_parse_header(WvHeader *wv, const uint8_t *data)
Parse a WavPack block header.
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
static const uint8_t header[24]
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
void avio_wl32(AVIOContext *s, unsigned int val)
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
static int wv_write_packet(AVFormatContext *ctx, AVPacket *pkt)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
This structure stores compressed data.
#define flags(name, subs,...)
static int write_packet(AVFormatContext *s1, AVPacket *pkt)
void * priv_data
Format private data.
const AVOutputFormat ff_wv_muxer