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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCORE_SAMPLEFMT_H
#define AVCORE_SAMPLEFMT_H
#include "avcore.h"
/**
* all in native-endian format
*/
enum AVSampleFormat {
AV_SAMPLE_FMT_NONE = -1,
AV_SAMPLE_FMT_U8, ///< unsigned 8 bits
AV_SAMPLE_FMT_S16, ///< signed 16 bits
AV_SAMPLE_FMT_S32, ///< signed 32 bits
AV_SAMPLE_FMT_FLT, ///< float
AV_SAMPLE_FMT_DBL, ///< double
AV_SAMPLE_FMT_NB ///< Number of sample formats. DO NOT USE if dynamically linking to libavcore
};
/**
* Return the name of sample_fmt, or NULL if sample_fmt is not
* recognized.
*/
const char *av_get_sample_fmt_name(enum AVSampleFormat sample_fmt);
/**
* Return a sample format corresponding to name, or AV_SAMPLE_FMT_NONE
* on error.
*/
enum AVSampleFormat av_get_sample_fmt(const char *name);
/**
* Generate a string corresponding to the sample format with
* sample_fmt, or a header if sample_fmt is negative.
*
* @param buf the buffer where to write the string
* @param buf_size the size of buf
* @param sample_fmt the number of the sample format to print the
* corresponding info string, or a negative value to print the
* corresponding header.
* @return the pointer to the filled buffer or NULL if sample_fmt is
* unknown or in case of other errors
*/
char *av_get_sample_fmt_string(char *buf, int buf_size, enum AVSampleFormat sample_fmt);
/**
* Return sample format bits per sample.
*
* @param sample_fmt the sample format
* @return number of bits per sample or zero if unknown for the given
* sample format
*/
int av_get_bits_per_sample_fmt(enum AVSampleFormat sample_fmt);
/**
* Fill channel data pointers and linesizes for samples with sample
* format sample_fmt.
*
* The pointers array is filled with the pointers to the samples data:
* data[c] points to the first sample of channel c.
* data[c] + linesize[0] points to the second sample of channel c
*
* @param pointers array to be filled with the pointer for each plane, may be NULL
* @param linesizes array to be filled with the linesize, may be NULL
* @param buf the pointer to a buffer containing the samples
* @param nb_samples the number of samples in a single channel
* @param planar 1 if the samples layout is planar, 0 if it is packed
* @param nb_channels the number of channels
* @return the total size of the buffer, a negative
* error code in case of failure
*/
int av_samples_fill_arrays(uint8_t *pointers[8], int linesizes[8],
uint8_t *buf, int nb_channels, int nb_samples,
enum AVSampleFormat sample_fmt, int planar, int align);
/**
* Allocate a samples buffer for nb_samples samples, and
* fill pointers and linesizes accordingly.
* The allocated samples buffer has to be freed by using
* av_freep(&pointers[0]).
*
* @param nb_samples number of samples per channel
* @param planar 1 if the samples layout is planar, 0 if packed,
* @param align the value to use for buffer size alignment
* @return the size in bytes required for the samples buffer, a negative
* error code in case of failure
* @see av_samples_fill_arrays()
*/
int av_samples_alloc(uint8_t *pointers[8], int linesizes[8],
int nb_samples, int nb_channels,
enum AVSampleFormat sample_fmt, int planar,
int align);
#endif /* AVCORE_SAMPLEFMT_H */
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