org.bytedeco.javacpp

Class swresample

java.lang.Object

org.bytedeco.javacpp.presets.swresample

org.bytedeco.javacpp.swresample

All Implemented Interfaces:

InfoMapper

public class swresample
extends swresample

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	swresample.SwrContext The libswresample context.

Field Summary

Fields

Modifier and Type	Field and Description
static int	SWR_CH_MAX Maximum number of channels
static int	SWR_DITHER_NB enum SwrDitherType
static int	SWR_DITHER_NONE enum SwrDitherType
static int	SWR_DITHER_NS enum SwrDitherType
static int	SWR_DITHER_NS_F_WEIGHTED enum SwrDitherType
static int	SWR_DITHER_NS_HIGH_SHIBATA enum SwrDitherType
static int	SWR_DITHER_NS_IMPROVED_E_WEIGHTED enum SwrDitherType
static int	SWR_DITHER_NS_LIPSHITZ enum SwrDitherType
static int	SWR_DITHER_NS_LOW_SHIBATA enum SwrDitherType
static int	SWR_DITHER_NS_MODIFIED_E_WEIGHTED enum SwrDitherType
static int	SWR_DITHER_NS_SHIBATA enum SwrDitherType
static int	SWR_DITHER_RECTANGULAR enum SwrDitherType
static int	SWR_DITHER_TRIANGULAR enum SwrDitherType
static int	SWR_DITHER_TRIANGULAR_HIGHPASS enum SwrDitherType
static int	SWR_ENGINE_NB enum SwrEngine
static int	SWR_ENGINE_SOXR enum SwrEngine
static int	SWR_ENGINE_SWR enum SwrEngine
static int	SWR_FILTER_TYPE_BLACKMAN_NUTTALL enum SwrFilterType
static int	SWR_FILTER_TYPE_CUBIC enum SwrFilterType
static int	SWR_FILTER_TYPE_KAISER enum SwrFilterType
static int	SWR_FLAG_RESAMPLE Force resampling even if equal sample rate

Constructor Summary

Constructors

Constructor and Description
swresample()

Method Summary

Methods

Modifier and Type	Method and Description
static swresample.SwrContext	swr_alloc_set_opts(swresample.SwrContext s, long out_ch_layout, int out_sample_fmt, int out_sample_rate, long in_ch_layout, int in_sample_fmt, int in_sample_rate, int log_offset, Pointer log_ctx) Allocate SwrContext if needed and set/reset common parameters.
static swresample.SwrContext	swr_alloc() Allocate SwrContext.
static void	swr_close(swresample.SwrContext s) Closes the context so that swr_is_initialized() returns 0.
static int	swr_convert(swresample.SwrContext s, byte[] out, int out_count, byte[] in, int in_count)
static int	swr_convert(swresample.SwrContext s, ByteBuffer out, int out_count, ByteBuffer in, int in_count)
static int	swr_convert(swresample.SwrContext s, BytePointer out, int out_count, BytePointer in, int in_count)
static int	swr_convert(swresample.SwrContext s, PointerPointer out, int out_count, PointerPointer in, int in_count) Convert audio.
static int	swr_drop_output(swresample.SwrContext s, int count) Drops the specified number of output samples.
static void	swr_free(PointerPointer s) Free the given SwrContext and set the pointer to NULL.
static void	swr_free(swresample.SwrContext s)
static avutil.AVClass	swr_get_class() Get the AVClass for SwrContext.
static long	swr_get_delay(swresample.SwrContext s, long base) Gets the delay the next input sample will experience relative to the next output sample.
static int	swr_init(swresample.SwrContext s) Initialize context after user parameters have been set.
static int	swr_inject_silence(swresample.SwrContext s, int count) Injects the specified number of silence samples.
static int	swr_is_initialized(swresample.SwrContext s) Check whether an swr context has been initialized or not.
static long	swr_next_pts(swresample.SwrContext s, long pts) Convert the next timestamp from input to output timestamps are in 1/(in_sample_rate * out_sample_rate) units.
static int	swr_set_channel_mapping(swresample.SwrContext s, int[] channel_map)
static int	swr_set_channel_mapping(swresample.SwrContext s, IntBuffer channel_map)
static int	swr_set_channel_mapping(swresample.SwrContext s, IntPointer channel_map) Set a customized input channel mapping.
static int	swr_set_compensation(swresample.SwrContext s, int sample_delta, int compensation_distance) Activate resampling compensation ("soft" compensation).
static int	swr_set_matrix(swresample.SwrContext s, double[] matrix, int stride)
static int	swr_set_matrix(swresample.SwrContext s, DoubleBuffer matrix, int stride)
static int	swr_set_matrix(swresample.SwrContext s, DoublePointer matrix, int stride) Set a customized remix matrix.
static BytePointer	swresample_configuration() Return the swr build-time configuration.
static BytePointer	swresample_license() Return the swr license.
static int	swresample_version() Return the @ref LIBSWRESAMPLE_VERSION_INT constant.

Methods inherited from class org.bytedeco.javacpp.presets.swresample

map

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

SWR_CH_MAX

public static final int SWR_CH_MAX

Maximum number of channels

See Also:

Constant Field Values

SWR_FLAG_RESAMPLE

public static final int SWR_FLAG_RESAMPLE

Force resampling even if equal sample rate

See Also:

Constant Field Values

SWR_DITHER_NONE

public static final int SWR_DITHER_NONE

enum SwrDitherType

See Also:

Constant Field Values

SWR_DITHER_RECTANGULAR

public static final int SWR_DITHER_RECTANGULAR

enum SwrDitherType

See Also:

Constant Field Values

SWR_DITHER_TRIANGULAR

public static final int SWR_DITHER_TRIANGULAR

enum SwrDitherType

See Also:

Constant Field Values

SWR_DITHER_TRIANGULAR_HIGHPASS

public static final int SWR_DITHER_TRIANGULAR_HIGHPASS

enum SwrDitherType

See Also:

Constant Field Values

SWR_DITHER_NS

public static final int SWR_DITHER_NS

enum SwrDitherType

See Also:

Constant Field Values

SWR_DITHER_NS_LIPSHITZ

public static final int SWR_DITHER_NS_LIPSHITZ

enum SwrDitherType

See Also:

Constant Field Values

SWR_DITHER_NS_F_WEIGHTED

public static final int SWR_DITHER_NS_F_WEIGHTED

enum SwrDitherType

See Also:

Constant Field Values

SWR_DITHER_NS_MODIFIED_E_WEIGHTED

public static final int SWR_DITHER_NS_MODIFIED_E_WEIGHTED

enum SwrDitherType

See Also:

Constant Field Values

SWR_DITHER_NS_IMPROVED_E_WEIGHTED

public static final int SWR_DITHER_NS_IMPROVED_E_WEIGHTED

enum SwrDitherType

See Also:

Constant Field Values

SWR_DITHER_NS_SHIBATA

public static final int SWR_DITHER_NS_SHIBATA

enum SwrDitherType

See Also:

Constant Field Values

SWR_DITHER_NS_LOW_SHIBATA

public static final int SWR_DITHER_NS_LOW_SHIBATA

enum SwrDitherType

See Also:

Constant Field Values

SWR_DITHER_NS_HIGH_SHIBATA

public static final int SWR_DITHER_NS_HIGH_SHIBATA

enum SwrDitherType

See Also:

Constant Field Values

SWR_DITHER_NB

public static final int SWR_DITHER_NB

enum SwrDitherType

See Also:

Constant Field Values

SWR_ENGINE_SWR

public static final int SWR_ENGINE_SWR

enum SwrEngine

See Also:

Constant Field Values

SWR_ENGINE_SOXR

public static final int SWR_ENGINE_SOXR

enum SwrEngine

See Also:

Constant Field Values

SWR_ENGINE_NB

public static final int SWR_ENGINE_NB

enum SwrEngine

See Also:

Constant Field Values

SWR_FILTER_TYPE_CUBIC

public static final int SWR_FILTER_TYPE_CUBIC

enum SwrFilterType

See Also:

Constant Field Values

SWR_FILTER_TYPE_BLACKMAN_NUTTALL

public static final int SWR_FILTER_TYPE_BLACKMAN_NUTTALL

enum SwrFilterType

See Also:

Constant Field Values

SWR_FILTER_TYPE_KAISER

public static final int SWR_FILTER_TYPE_KAISER

enum SwrFilterType

See Also:

Constant Field Values

Constructor Detail

swresample

public swresample()

Method Detail

swr_get_class

public static avutil.AVClass swr_get_class()

Get the AVClass for SwrContext. It can be used in combination with AV_OPT_SEARCH_FAKE_OBJ for examining options.

Returns:

the AVClass of SwrContext

See Also:

av_opt_find().

swr_alloc

public static swresample.SwrContext swr_alloc()

Allocate SwrContext. If you use this function you will need to set the parameters (manually or with swr_alloc_set_opts()) before calling swr_init().

Returns:

NULL on error, allocated context otherwise

See Also:

swr_alloc_set_opts(), swr_init(), swr_free()

swr_init

public static int swr_init(swresample.SwrContext s)

Initialize context after user parameters have been set.

Returns:

AVERROR error code in case of failure.

swr_is_initialized

public static int swr_is_initialized(swresample.SwrContext s)

Check whether an swr context has been initialized or not.

Returns:

positive if it has been initialized, 0 if not initialized

See Also:

swr_init()

swr_alloc_set_opts

public static swresample.SwrContext swr_alloc_set_opts(swresample.SwrContext s,
                                       long out_ch_layout,
                                       int out_sample_fmt,
                                       int out_sample_rate,
                                       long in_ch_layout,
                                       int in_sample_fmt,
                                       int in_sample_rate,
                                       int log_offset,
                                       Pointer log_ctx)

Allocate SwrContext if needed and set/reset common parameters. This function does not require s to be allocated with swr_alloc(). On the other hand, swr_alloc() can use swr_alloc_set_opts() to set the parameters on the allocated context.

Parameters:

s - existing Swr context if available, or NULL if not

out_ch_layout - output channel layout (AV_CH_LAYOUT_*)

out_sample_fmt - output sample format (AV_SAMPLE_FMT_*).

out_sample_rate - output sample rate (frequency in Hz)

in_ch_layout - input channel layout (AV_CH_LAYOUT_*)

in_sample_fmt - input sample format (AV_SAMPLE_FMT_*).

in_sample_rate - input sample rate (frequency in Hz)

log_offset - logging level offset

log_ctx - parent logging context, can be NULL

Returns:

NULL on error, allocated context otherwise

See Also:

swr_init(), swr_free()

swr_free

public static void swr_free(PointerPointer s)

Free the given SwrContext and set the pointer to NULL.

swr_free

public static void swr_free(swresample.SwrContext s)

swr_close

public static void swr_close(swresample.SwrContext s)

Closes the context so that swr_is_initialized() returns 0. The context can be brought back to life by running swr_init(), swr_init() can also be used without swr_close(). This function is mainly provided for simplifying the usecase where one tries to support libavresample and libswresample.

swr_convert

public static int swr_convert(swresample.SwrContext s,
              PointerPointer out,
              int out_count,
              PointerPointer in,
              int in_count)

Convert audio. in and in_count can be set to 0 to flush the last few samples out at the end. If more input is provided than output space then the input will be buffered. You can avoid this buffering by providing more output space than input. Conversion will run directly without copying whenever possible.

Parameters:

s - allocated Swr context, with parameters set

out - output buffers, only the first one need be set in case of packed audio

out_count - amount of space available for output in samples per channel

in - input buffers, only the first one need to be set in case of packed audio

in_count - number of input samples available in one channel

Returns:

number of samples output per channel, negative value on error

swr_convert

public static int swr_convert(swresample.SwrContext s,
              BytePointer out,
              int out_count,
              BytePointer in,
              int in_count)

swr_convert

public static int swr_convert(swresample.SwrContext s,
              ByteBuffer out,
              int out_count,
              ByteBuffer in,
              int in_count)

swr_convert

public static int swr_convert(swresample.SwrContext s,
              byte[] out,
              int out_count,
              byte[] in,
              int in_count)

swr_next_pts

public static long swr_next_pts(swresample.SwrContext s,
                long pts)

Convert the next timestamp from input to output timestamps are in 1/(in_sample_rate * out_sample_rate) units.

Parameters:

s[in] - initialized Swr context

pts[in] - timestamp for the next input sample, INT64_MIN if unknown

Returns:

the output timestamp for the next output sample

See Also:

swr_set_compensation(), swr_drop_output(), and swr_inject_silence() are function used internally for timestamp compensation.

swr_set_compensation

public static int swr_set_compensation(swresample.SwrContext s,
                       int sample_delta,
                       int compensation_distance)

Activate resampling compensation ("soft" compensation). This function is internally called when needed in swr_next_pts().

Returns:

>= 0 on success, AVERROR error codes if:

swr_set_channel_mapping

public static int swr_set_channel_mapping(swresample.SwrContext s,
                          IntPointer channel_map)

Set a customized input channel mapping.

Returns:

>= 0 on success, or AVERROR error code in case of failure.

swr_set_channel_mapping

public static int swr_set_channel_mapping(swresample.SwrContext s,
                          IntBuffer channel_map)

swr_set_channel_mapping

public static int swr_set_channel_mapping(swresample.SwrContext s,
                          int[] channel_map)

swr_set_matrix

public static int swr_set_matrix(swresample.SwrContext s,
                 DoublePointer matrix,
                 int stride)

Set a customized remix matrix.

Parameters:

s - allocated Swr context, not yet initialized

matrix - remix coefficients; matrix[i + stride * o] is the weight of input channel i in output channel o

stride - offset between lines of the matrix

Returns:

>= 0 on success, or AVERROR error code in case of failure.

swr_set_matrix

public static int swr_set_matrix(swresample.SwrContext s,
                 DoubleBuffer matrix,
                 int stride)

swr_set_matrix

public static int swr_set_matrix(swresample.SwrContext s,
                 double[] matrix,
                 int stride)

swr_drop_output

public static int swr_drop_output(swresample.SwrContext s,
                  int count)

Drops the specified number of output samples. This function, along with swr_inject_silence(), is called by swr_next_pts() if needed for "hard" compensation.

Parameters:

s - allocated Swr context

count - number of samples to be dropped

Returns:

>= 0 on success, or a negative AVERROR code on failure

swr_inject_silence

public static int swr_inject_silence(swresample.SwrContext s,
                     int count)

Injects the specified number of silence samples. This function, along with swr_drop_output(), is called by swr_next_pts() if needed for "hard" compensation.

Parameters:

s - allocated Swr context

count - number of samples to be dropped

Returns:

>= 0 on success, or a negative AVERROR code on failure

swr_get_delay

public static long swr_get_delay(swresample.SwrContext s,
                 long base)

Gets the delay the next input sample will experience relative to the next output sample. Swresample can buffer data if more input has been provided than available output space, also converting between sample rates needs a delay. This function returns the sum of all such delays. The exact delay is not necessarily an integer value in either input or output sample rate. Especially when downsampling by a large value, the output sample rate may be a poor choice to represent the delay, similarly for upsampling and the input sample rate.

Parameters:

s - swr context

base - timebase in which the returned delay will be:

swresample_version

public static int swresample_version()

Return the @ref LIBSWRESAMPLE_VERSION_INT constant. This is useful to check if the build-time libswresample has the same version as the run-time one.

swresample_configuration

public static BytePointer swresample_configuration()

Return the swr build-time configuration.

swresample_license

public static BytePointer swresample_license()

Return the swr license.