samplefmt.c File Reference

#include "common.h"
#include "samplefmt.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

Go to the source code of this file.

Data Structures
struct	SampleFmtInfo

Functions
const char *	av_get_sample_fmt_name (enum AVSampleFormat sample_fmt)
	Return the name of sample_fmt, or NULL if sample_fmt is not recognized.
enum AVSampleFormat	av_get_sample_fmt (const char *name)
	Return a sample format corresponding to name, or AV_SAMPLE_FMT_NONE on error.
enum AVSampleFormat	av_get_alt_sample_fmt (enum AVSampleFormat sample_fmt, int planar)
	Return the planar<->packed alternative form of the given sample format, or AV_SAMPLE_FMT_NONE on error.
enum AVSampleFormat	av_get_packed_sample_fmt (enum AVSampleFormat sample_fmt)
	Get the packed alternative form of the given sample format.
enum AVSampleFormat	av_get_planar_sample_fmt (enum AVSampleFormat sample_fmt)
	Get the planar alternative form of the given sample format.
char *	av_get_sample_fmt_string (char *buf, int buf_size, enum AVSampleFormat sample_fmt)
	Generate a string corresponding to the sample format with sample_fmt, or a header if sample_fmt is negative.
int	av_get_bytes_per_sample (enum AVSampleFormat sample_fmt)
	Return number of bytes per sample.
int	av_get_bits_per_sample_fmt (enum AVSampleFormat sample_fmt)
int	av_sample_fmt_is_planar (enum AVSampleFormat sample_fmt)
	Check if the sample format is planar.
int	av_samples_get_buffer_size (int *linesize, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)
	Get the required buffer size for the given audio parameters.
int	av_samples_fill_arrays (uint8_t **audio_data, int *linesize, const uint8_t *buf, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)
	Fill plane data pointers and linesize for samples with sample format sample_fmt.
int	av_samples_alloc (uint8_t **audio_data, int *linesize, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)
	Allocate a samples buffer for nb_samples samples, and fill data pointers and linesize accordingly.
int	av_samples_alloc_array_and_samples (uint8_t ***audio_data, int *linesize, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)
	Allocate a data pointers array, samples buffer for nb_samples samples, and fill data pointers and linesize accordingly.
int	av_samples_copy (uint8_t **dst, uint8_t *const *src, int dst_offset, int src_offset, int nb_samples, int nb_channels, enum AVSampleFormat sample_fmt)
	Copy samples from src to dst.
int	av_samples_set_silence (uint8_t **audio_data, int offset, int nb_samples, int nb_channels, enum AVSampleFormat sample_fmt)
	Fill an audio buffer with silence.

Variables
static const SampleFmtInfo	sample_fmt_info [AV_SAMPLE_FMT_NB]
	this table gives more information about formats

Variable Documentation

const SampleFmtInfo sample_fmt_info[AV_SAMPLE_FMT_NB]

static

Initial value:

= {
    [AV_SAMPLE_FMT_U8]   = { .name =   "u8", .bits =  8, .planar = 0, .altform = AV_SAMPLE_FMT_U8P  },
    [AV_SAMPLE_FMT_S16]  = { .name =  "s16", .bits = 16, .planar = 0, .altform = AV_SAMPLE_FMT_S16P },
    [AV_SAMPLE_FMT_S32]  = { .name =  "s32", .bits = 32, .planar = 0, .altform = AV_SAMPLE_FMT_S32P },
    [AV_SAMPLE_FMT_FLT]  = { .name =  "flt", .bits = 32, .planar = 0, .altform = AV_SAMPLE_FMT_FLTP },
    [AV_SAMPLE_FMT_DBL]  = { .name =  "dbl", .bits = 64, .planar = 0, .altform = AV_SAMPLE_FMT_DBLP },
    [AV_SAMPLE_FMT_U8P]  = { .name =  "u8p", .bits =  8, .planar = 1, .altform = AV_SAMPLE_FMT_U8   },
    [AV_SAMPLE_FMT_S16P] = { .name = "s16p", .bits = 16, .planar = 1, .altform = AV_SAMPLE_FMT_S16  },
    [AV_SAMPLE_FMT_S32P] = { .name = "s32p", .bits = 32, .planar = 1, .altform = AV_SAMPLE_FMT_S32  },
    [AV_SAMPLE_FMT_FLTP] = { .name = "fltp", .bits = 32, .planar = 1, .altform = AV_SAMPLE_FMT_FLT  },
    [AV_SAMPLE_FMT_DBLP] = { .name = "dblp", .bits = 64, .planar = 1, .altform = AV_SAMPLE_FMT_DBL  },
}

this table gives more information about formats

Definition at line 34 of file samplefmt.c.