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39 #define CHECK_LOOP(type) \
40 if (ast->loop ## type > 0) { \
41 ast->loop ## type = av_rescale_rnd(ast->loop ## type, par->sample_rate, 1000, AV_ROUND_DOWN); \
42 if (ast->loop ## type < 0 || ast->loop ## type > UINT_MAX) { \
43 av_log(s, AV_LOG_ERROR, "Invalid loop" #type " value\n"); \
44 return AVERROR(EINVAL); \
53 unsigned int codec_tag;
108 if (
s->streams[0]->nb_frames == 0)
179 #define OFFSET(obj) offsetof(ASTMuxContext, obj)
196 .p.extensions =
"ast",
#define AV_LOG_WARNING
Something somehow does not look correct.
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
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
static int ast_write_trailer(AVFormatContext *s)
This struct describes the properties of an encoded stream.
@ AV_CODEC_ID_PCM_S16BE_PLANAR
int nb_channels
Number of channels in this layout.
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 const AVClass ast_muxer_class
const AVCodecTag ff_codec_ast_tags[]
@ AV_OPT_TYPE_INT64
Underlying C type is int64_t.
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
static const AVOption options[]
#define LIBAVUTIL_VERSION_INT
Describe the class of an AVClass context structure.
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
const char * av_default_item_name(void *ptr)
Return the context name.
void ffio_fill(AVIOContext *s, int b, int64_t count)
AVChannelLayout ch_layout
Audio only.
#define AV_OPT_FLAG_ENCODING_PARAM
A generic parameter which can be set by the user for muxing or encoding.
int sample_rate
Audio only.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
void avio_wb32(AVIOContext *s, unsigned int val)
void avio_wl32(AVIOContext *s, unsigned int val)
const FFOutputFormat ff_ast_muxer
int block_align
Audio only.
#define FF_OFMT_FLAG_MAX_ONE_OF_EACH
If this flag is set, it indicates that for each codec type whose corresponding default codec (i....
const AVCodecTag *const ff_ast_codec_tags_list[]
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Filter the word “frame” indicates either a video frame or a group of audio samples
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
void avio_wb64(AVIOContext *s, uint64_t val)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
This structure stores compressed data.
void avio_wb16(AVIOContext *s, unsigned int val)
static int ast_write_header(AVFormatContext *s)
static int ast_write_packet(AVFormatContext *s, AVPacket *pkt)