doxygen/mlt__audio_8h_source.html

 #ifndef MLT_AUDIO_H

 #define MLT_AUDIO_H


 #include "mlt_types.h"


 struct mlt_audio_s

 {

     void *data;

     int frequency;

     mlt_audio_format format;

     int samples;

     int channels;

     mlt_channel_layout layout;

     mlt_destructor release_data;

     mlt_destructor close;

 };


 extern mlt_audio mlt_audio_new();

 extern void mlt_audio_close(mlt_audio self);

 extern void mlt_audio_set_values(

     mlt_audio self, void *data, int frequency, mlt_audio_format format, int samples, int channels);

 extern void mlt_audio_get_values(mlt_audio self,

                                  void **data,

                                  int *frequency,

                                  mlt_audio_format *format,

                                  int *samples,

                                  int *channels);

 extern void mlt_audio_alloc_data(mlt_audio self);

 extern void mlt_audio_free_data(mlt_audio self);

 extern int mlt_audio_calculate_size(mlt_audio self);

 extern int mlt_audio_plane_count(mlt_audio self);

 extern int mlt_audio_plane_size(mlt_audio self);

 extern void mlt_audio_get_planes(mlt_audio self, uint8_t **planes);

 extern void mlt_audio_silence(mlt_audio self, int samples, int start);

 extern void mlt_audio_shrink(mlt_audio self, int samples);

 extern void mlt_audio_reverse(mlt_audio self);

 extern void mlt_audio_copy(mlt_audio dst, mlt_audio src, int samples, int src_start, int dst_start);

 extern int mlt_audio_calculate_frame_samples(float fps, int frequency, int64_t position);

 extern int64_t mlt_audio_calculate_samples_to_position(float fps, int frequency, int64_t position);

 extern const char *mlt_audio_format_name(mlt_audio_format format);

 extern int mlt_audio_format_size(mlt_audio_format format, int samples, int channels);

 extern const char *mlt_audio_channel_layout_name(mlt_channel_layout layout);

 extern mlt_channel_layout mlt_audio_channel_layout_id(const char *name);

 extern int mlt_audio_channel_layout_channels(mlt_channel_layout layout);

 extern mlt_channel_layout mlt_audio_channel_layout_default(int channels);


 #endif

mlt_audio_channel_layout_name
const char * mlt_audio_channel_layout_name(mlt_channel_layout layout)
Get the short name for a channel layout.
Definition: mlt_audio.c:612

mlt_audio_new
mlt_audio mlt_audio_new()
Allocate a new Audio object.
Definition: mlt_audio.c:35

mlt_types.h
Provides forward definitions of all public types.

mlt_channel_layout
mlt_channel_layout
Definition: mlt_types.h:70

mlt_destructor
void(* mlt_destructor)(void *)
pointer to destructor function
Definition: mlt_types.h:269

mlt_audio_format
mlt_audio_format
The set of supported audio formats.
Definition: mlt_types.h:60

mlt_audio_s
Audio class.
Definition: mlt_audio.h:34

mlt_audio_s::release_data
mlt_destructor release_data
Definition: mlt_audio.h:41

mlt_audio_s::mlt_audio_reverse
void mlt_audio_reverse(mlt_audio self)
Reverse the audio samples.
Definition: mlt_audio.c:345

mlt_audio_s::mlt_audio_calculate_size
int mlt_audio_calculate_size(mlt_audio self)
Calculate the number of bytes needed for the Audio data.
Definition: mlt_audio.c:168

mlt_audio_s::format
mlt_audio_format format
Definition: mlt_audio.h:37

mlt_audio_s::mlt_audio_get_planes
void mlt_audio_get_planes(mlt_audio self, uint8_t **planes)
Populate an array of pointers each pointing to the beginning of an audio plane.
Definition: mlt_audio.c:238

mlt_audio_s::data
void * data
Definition: mlt_audio.h:35

mlt_audio_s::mlt_audio_plane_count
int mlt_audio_plane_count(mlt_audio self)
Get the number of planes for the audio type.
Definition: mlt_audio.c:182

mlt_audio_s::close
mlt_destructor close
Definition: mlt_audio.h:42

mlt_audio_s::channels
int channels
Definition: mlt_audio.h:39

mlt_audio_s::layout
mlt_channel_layout layout
Definition: mlt_audio.h:40

mlt_audio_s::mlt_audio_set_values
void mlt_audio_set_values(mlt_audio self, void *data, int frequency, mlt_audio_format format, int samples, int channels)
Set the most common values for the audio.
Definition: mlt_audio.c:74

mlt_audio_s::mlt_audio_shrink
void mlt_audio_shrink(mlt_audio self, int samples)
Shrink the audio to the new number of samples.
Definition: mlt_audio.c:315

mlt_audio_s::mlt_audio_plane_size
int mlt_audio_plane_size(mlt_audio self)
Get the size of an audio plane.
Definition: mlt_audio.c:210

mlt_audio_s::mlt_audio_close
void mlt_audio_close(mlt_audio self)
Destroy an audio object created by mlt_audio_new().
Definition: mlt_audio.c:48

mlt_audio_s::frequency
int frequency
Definition: mlt_audio.h:36

mlt_audio_s::samples
int samples
Definition: mlt_audio.h:38

mlt_audio_s::mlt_audio_get_values
void mlt_audio_get_values(mlt_audio self, void **data, int *frequency, mlt_audio_format *format, int *samples, int *channels)
Get the most common values for the audio.
Definition: mlt_audio.c:98

mlt_audio_s::mlt_audio_free_data
void mlt_audio_free_data(mlt_audio self)
Free the data field using the destructor function.
Definition: mlt_audio.c:148

mlt_audio_s::mlt_audio_alloc_data
void mlt_audio_alloc_data(mlt_audio self)
Allocate the data field based on the other properties of the Audio.
Definition: mlt_audio.c:125

mlt_frame_s::mlt_audio_format_name
const char * mlt_audio_format_name(mlt_audio_format format)
Get the short name for an audio format.
Definition: mlt_audio.c:555

mlt_frame_s::mlt_audio_channel_layout_channels
int mlt_audio_channel_layout_channels(mlt_channel_layout layout)
Get the number of channels for a channel layout.
Definition: mlt_audio.c:700

mlt_frame_s::mlt_audio_copy
void mlt_audio_copy(mlt_audio dst, mlt_audio src, int samples, int src_start, int dst_start)
Copy audio samples from src to dst.
Definition: mlt_audio.c:443

mlt_frame_s::mlt_audio_channel_layout_default
mlt_channel_layout mlt_audio_channel_layout_default(int channels)
Get a default channel layout for a given number of channels.
Definition: mlt_audio.c:768

mlt_frame_s::mlt_audio_calculate_frame_samples
int mlt_audio_calculate_frame_samples(float fps, int frequency, int64_t position)
Determine the number of samples that belong in a frame at a time position.
Definition: mlt_audio.c:513

mlt_frame_s::mlt_audio_calculate_samples_to_position
int64_t mlt_audio_calculate_samples_to_position(float fps, int frequency, int64_t position)
Determine the number of samples that belong before a time position.
Definition: mlt_audio.c:535

mlt_frame_s::mlt_audio_channel_layout_id
mlt_channel_layout mlt_audio_channel_layout_id(const char *name)
Get the id of channel layout from short name.
Definition: mlt_audio.c:680

mlt_frame_s::mlt_audio_format_size
int mlt_audio_format_size(mlt_audio_format format, int samples, int channels)
Get the amount of bytes needed for a block of audio.
Definition: mlt_audio.c:585

mlt_frame_s::mlt_audio_silence
void mlt_audio_silence(mlt_audio self, int samples, int start)
Set a range of samples to silence.
Definition: mlt_audio.c:257