samplerate conversion for both audio and video More...
#include "avcodec.h"
#include "audioconvert.h"
#include "libavutil/opt.h"
#include "libavutil/samplefmt.h"
Go to the source code of this file.
Data Structures | |
struct | ReSampleContext |
Macros | |
#define | MAX_CHANNELS 8 |
Functions | |
static const char * | context_to_name (void *ptr) |
static void | stereo_to_mono (short *output, short *input, int n1) |
static void | mono_to_stereo (short *output, short *input, int n1) |
static void | deinterleave (short **output, short *input, int channels, int samples) |
static void | interleave (short *output, short **input, int channels, int samples) |
static void | ac3_5p1_mux (short *output, short *input1, short *input2, int n) |
ReSampleContext * | av_audio_resample_init (int output_channels, int input_channels, int output_rate, int input_rate, enum AVSampleFormat sample_fmt_out, enum AVSampleFormat sample_fmt_in, int filter_length, int log2_phase_count, int linear, double cutoff) |
Initialize audio resampling context. | |
int | audio_resample (ReSampleContext *s, short *output, short *input, int nb_samples) |
void | audio_resample_close (ReSampleContext *s) |
Free resample context. |
Variables | |
static const AVOption | options [] = {{NULL}} |
static const AVClass | audioresample_context_class |
samplerate conversion for both audio and video
Definition in file resample.c.
#define MAX_CHANNELS 8 |
Definition at line 32 of file resample.c.
Referenced by audio_resample(), and av_audio_resample_init().
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Definition at line 133 of file resample.c.
Referenced by audio_resample().
int audio_resample | ( | ReSampleContext * | s, |
short * | output, | ||
short * | input, | ||
int | nb_samples | ||
) |
Definition at line 228 of file resample.c.
Referenced by do_audio_out().
void audio_resample_close | ( | ReSampleContext * | s | ) |
Free resample context.
s | a non-NULL pointer to a resample context previously created with av_audio_resample_init() |
Definition at line 359 of file resample.c.
Referenced by do_audio_out(), and transcode().
ReSampleContext* av_audio_resample_init | ( | int | output_channels, |
int | input_channels, | ||
int | output_rate, | ||
int | input_rate, | ||
enum AVSampleFormat | sample_fmt_out, | ||
enum AVSampleFormat | sample_fmt_in, | ||
int | filter_length, | ||
int | log2_phase_count, | ||
int | linear, | ||
double | cutoff | ||
) |
Initialize audio resampling context.
output_channels | number of output channels |
input_channels | number of input channels |
output_rate | output sample rate |
input_rate | input sample rate |
sample_fmt_out | requested output sample format |
sample_fmt_in | input sample format |
filter_length | length of each FIR filter in the filterbank relative to the cutoff frequency |
log2_phase_count | log2 of the number of entries in the polyphase filterbank |
linear | if 1 then the used FIR filter will be linearly interpolated between the 2 closest, if 0 the closest will be used |
cutoff | cutoff frequency, 1.0 corresponds to half the output sampling rate |
Definition at line 150 of file resample.c.
Referenced by do_audio_out().
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Definition at line 36 of file resample.c.
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Definition at line 111 of file resample.c.
Referenced by audio_resample().
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Definition at line 122 of file resample.c.
Referenced by audio_resample().
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Definition at line 86 of file resample.c.
Referenced by audio_resample().
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Definition at line 61 of file resample.c.
Referenced by audio_resample().
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Definition at line 42 of file resample.c.
Definition at line 41 of file resample.c.