libavcore/samplefmt.c File Reference

#include "avcore.h"
#include "samplefmt.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.
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_bits_per_sample_fmt (enum AVSampleFormat sample_fmt)
	Return sample format bits per sample.
Variables
static const SampleFmtInfo	sample_fmt_info [AV_SAMPLE_FMT_NB]
	this table gives more information about formats

---

Function Documentation

int av_get_bits_per_sample_fmt

(

enum AVSampleFormat

sample_fmt

)

Return sample format bits per sample.

Parameters:

sample_fmt

the sample format

Returns:

number of bits per sample or zero if unknown for the given sample format

Definition at line 66 of file samplefmt.c.

Referenced by audio_decode_frame(), av_audio_resample_init(), av_get_bits_per_sample_format(), avfilter_default_get_audio_buffer(), decode_frame(), decode_init(), do_audio_out(), mkv_write_tracks(), and output_packet().

enum AVSampleFormat av_get_sample_fmt

(

const char *

name

)

Return a sample format corresponding to name, or AV_SAMPLE_FMT_NONE on error.

Definition at line 43 of file samplefmt.c.

Referenced by avcodec_get_sample_fmt(), and opt_audio_sample_fmt().

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.

Definition at line 36 of file samplefmt.c.

Referenced by audio_decode_frame(), av_audio_resample_init(), avcodec_get_sample_fmt_name(), avcodec_string(), do_audio_out(), ff_dprintf_link(), and print_digraph().

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.

Parameters:

	buf	the buffer where to write the string
	buf_size	the size of buf
	sample_fmt	the number of the sample format to print the corresponding info string, or a negative value to print the corresponding header.

Returns:

the pointer to the filled buffer or NULL if sample_fmt is unknown or in case of other errors

Definition at line 53 of file samplefmt.c.

Referenced by avcodec_sample_fmt_string(), and opt_audio_sample_fmt().

---

Variable Documentation

const SampleFmtInfo sample_fmt_info[AV_SAMPLE_FMT_NB] [static]

Initial value:

 {
    [AV_SAMPLE_FMT_U8]  = { .name = "u8",  .bits = 8 },
    [AV_SAMPLE_FMT_S16] = { .name = "s16", .bits = 16 },
    [AV_SAMPLE_FMT_S32] = { .name = "s32", .bits = 32 },
    [AV_SAMPLE_FMT_FLT] = { .name = "flt", .bits = 32 },
    [AV_SAMPLE_FMT_DBL] = { .name = "dbl", .bits = 64 },
}

this table gives more information about formats

Definition at line 28 of file samplefmt.c.