ffmpeg.libswresample.swresample

Undocumented in source.

Members

Enums

SwrDitherType enum SwrDitherType: Dithering algorithms
SwrEngine enum SwrEngine: Resampling Engines
SwrFilterType enum SwrFilterType: Resampling Filter Types

Functions

swr_alloc SwrContext* swr_alloc(): Allocate SwrContext.
swr_alloc_set_opts SwrContext* swr_alloc_set_opts(SwrContext* s, int64_t out_ch_layout, AVSampleFormat out_sample_fmt, int out_sample_rate, int64_t in_ch_layout, AVSampleFormat in_sample_fmt, int in_sample_rate, int log_offset, void* log_ctx): Allocate SwrContext if needed and set/reset common parameters.
swr_close void swr_close(SwrContext* s): Closes the context so that swr_is_initialized() returns 0.
swr_config_frame int swr_config_frame(SwrContext* swr, AVFrame* out_frame, AVFrame* in_frame): Configure or reconfigure the SwrContext using the information provided by the AVFrames.
swr_convert
int swr_convert(SwrContext* s, uint8_t** out_b, int out_count, uint8_t** in_b, int in_count): Convert audio.
swr_convert_frame int swr_convert_frame(SwrContext* swr, AVFrame* output, AVFrame* input): Convert the samples in the input AVFrame and write them to the output AVFrame.
swr_drop_output int swr_drop_output(SwrContext* s, int count): Drops the specified number of output samples.
swr_free
void swr_free(SwrContext** s): Free the given SwrContext and set the pointer to NULL.
swr_get_class AVClass* swr_get_class(): Get the AVClass for SwrContext. It can be used in combination with AV_OPT_SEARCH_FAKE_OBJ for examining options.
swr_get_delay int64_t swr_get_delay(SwrContext* s, int64_t base): Gets the delay the next input sample will experience relative to the next output sample.
swr_get_out_samples int swr_get_out_samples(SwrContext* s, int in_samples): Find an upper bound on the number of samples that the next swr_convert call will output, if called with in_samples of input samples. This depends on the internal state, and anything changing the internal state (like further swr_convert() calls) will may change the number of samples swr_get_out_samples() returns for the same number of input samples.
swr_init int swr_init(SwrContext* s): Initialize context after user parameters have been set. @note The context must be configured using the AVOption API.
swr_inject_silence int swr_inject_silence(SwrContext* s, int count): Injects the specified number of silence samples.
swr_is_initialized int swr_is_initialized(SwrContext* s): Check whether an swr context has been initialized or not.
swr_next_pts int64_t swr_next_pts(SwrContext* s, int64_t pts): Convert the next timestamp from input to output timestamps are in 1/(in_sample_rate * out_sample_rate) units.
swr_set_channel_mapping int swr_set_channel_mapping(SwrContext* s, int* channel_map): Set a customized input channel mapping.
swr_set_compensation int swr_set_compensation(SwrContext* s, int sample_delta, int compensation_distance): Activate resampling compensation ("soft" compensation). This function is internally called when needed in swr_next_pts().
swr_set_matrix int swr_set_matrix(SwrContext* s, double* matrix, int stride): Set a customized remix matrix.
swresample_configuration char* swresample_configuration(): Return the swr build-time configuration.
swresample_license char* swresample_license(): Return the swr license.
swresample_version uint swresample_version(): Return the @ref LIBSWRESAMPLE_VERSION_INT constant.

Manifest constants

SWR_CH_MAX enum SWR_CH_MAX;: Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
SWR_FLAG_RESAMPLE enum SWR_FLAG_RESAMPLE;: * @name Option constants * These constants are used for the @ref avoptions interface for lswr. * @{ * *////< Force resampling even if equal sample rat

Structs

SwrContext struct SwrContext: The libswresample context. Unlike libavcodec and libavformat, this structure is opaque. This means that if you would like to set options, you must use the @ref avoptions API and cannot directly set values to members of the structure.

ffmpeg.libswresample.swresample

Members

Enums

Functions

Manifest constants

Structs

Meta

Source