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FFmpeg 5.1.6
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libswresample public header More...
#include <stdint.h>#include "libavutil/channel_layout.h"#include "libavutil/frame.h"#include "libavutil/samplefmt.h"#include "libswresample/version_major.h"#include "libswresample/version.h"Go to the source code of this file.
Typedefs | |
| typedef struct SwrContext | SwrContext |
| The libswresample context. More... | |
Functions | |
| const AVClass * | swr_get_class (void) |
| Get the AVClass for SwrContext. More... | |
SwrContext constructor functions | |
| struct SwrContext * | swr_alloc (void) |
| Allocate SwrContext. More... | |
| int | swr_init (struct SwrContext *s) |
| Initialize context after user parameters have been set. More... | |
| int | swr_is_initialized (struct SwrContext *s) |
| Check whether an swr context has been initialized or not. More... | |
| int | swr_alloc_set_opts2 (struct SwrContext **ps, AVChannelLayout *out_ch_layout, enum AVSampleFormat out_sample_fmt, int out_sample_rate, AVChannelLayout *in_ch_layout, enum AVSampleFormat in_sample_fmt, int in_sample_rate, int log_offset, void *log_ctx) |
| Allocate SwrContext if needed and set/reset common parameters. More... | |
SwrContext destructor functions | |
| void | swr_free (struct SwrContext **s) |
| Free the given SwrContext and set the pointer to NULL. More... | |
| void | swr_close (struct SwrContext *s) |
| Closes the context so that swr_is_initialized() returns 0. More... | |
Core conversion functions | |
| int | swr_convert (struct SwrContext *s, uint8_t **out, int out_count, const uint8_t **in, int in_count) |
| Convert audio. More... | |
| int64_t | swr_next_pts (struct SwrContext *s, int64_t pts) |
| Convert the next timestamp from input to output timestamps are in 1/(in_sample_rate * out_sample_rate) units. More... | |
Low-level option setting functions | |
These functons provide a means to set low-level options that is not possible with the AVOption API. | |
| int | swr_set_compensation (struct SwrContext *s, int sample_delta, int compensation_distance) |
| Activate resampling compensation ("soft" compensation). More... | |
| int | swr_set_channel_mapping (struct SwrContext *s, const int *channel_map) |
| Set a customized input channel mapping. More... | |
| int | swr_build_matrix2 (const AVChannelLayout *in_layout, const AVChannelLayout *out_layout, double center_mix_level, double surround_mix_level, double lfe_mix_level, double maxval, double rematrix_volume, double *matrix, ptrdiff_t stride, enum AVMatrixEncoding matrix_encoding, void *log_context) |
| Generate a channel mixing matrix. More... | |
| int | swr_set_matrix (struct SwrContext *s, const double *matrix, int stride) |
| Set a customized remix matrix. More... | |
Sample handling functions | |
| int | swr_drop_output (struct SwrContext *s, int count) |
| Drops the specified number of output samples. More... | |
| int | swr_inject_silence (struct SwrContext *s, int count) |
| Injects the specified number of silence samples. More... | |
| int64_t | swr_get_delay (struct SwrContext *s, int64_t base) |
| Gets the delay the next input sample will experience relative to the next output sample. More... | |
| int | swr_get_out_samples (struct 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. More... | |
Configuration accessors | |
| unsigned | swresample_version (void) |
| Return the LIBSWRESAMPLE_VERSION_INT constant. More... | |
| const char * | swresample_configuration (void) |
| Return the swr build-time configuration. More... | |
| const char * | swresample_license (void) |
| Return the swr license. More... | |
AVFrame based API | |
| int | swr_convert_frame (SwrContext *swr, AVFrame *output, const AVFrame *input) |
| Convert the samples in the input AVFrame and write them to the output AVFrame. More... | |
| int | swr_config_frame (SwrContext *swr, const AVFrame *out, const AVFrame *in) |
| Configure or reconfigure the SwrContext using the information provided by the AVFrames. More... | |
Option constants | |
These constants are used for the AVOptions interface for lswr. | |
| #define | SWR_FLAG_RESAMPLE 1 |
| Force resampling even if equal sample rate. More... | |
| enum | SwrDitherType { SWR_DITHER_NONE = 0 , SWR_DITHER_RECTANGULAR , SWR_DITHER_TRIANGULAR , SWR_DITHER_TRIANGULAR_HIGHPASS , SWR_DITHER_NS = 64 , SWR_DITHER_NS_LIPSHITZ , SWR_DITHER_NS_F_WEIGHTED , SWR_DITHER_NS_MODIFIED_E_WEIGHTED , SWR_DITHER_NS_IMPROVED_E_WEIGHTED , SWR_DITHER_NS_SHIBATA , SWR_DITHER_NS_LOW_SHIBATA , SWR_DITHER_NS_HIGH_SHIBATA , SWR_DITHER_NB } |
| Dithering algorithms. More... | |
| enum | SwrEngine { SWR_ENGINE_SWR , SWR_ENGINE_SOXR , SWR_ENGINE_NB } |
| Resampling Engines. More... | |
| enum | SwrFilterType { SWR_FILTER_TYPE_CUBIC , SWR_FILTER_TYPE_BLACKMAN_NUTTALL , SWR_FILTER_TYPE_KAISER } |
| Resampling Filter Types. More... | |
libswresample public header
Definition in file swresample.h.
1.9.4