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samplefmt: add av_get_bytes_per_sample()

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Deprecate av_get_bits_per_sample_fmt(), which was a misnamed function.

For the moment we don't have sample formats with a non-integer number
of bytes, in that case we may need to create a new
av_get_bits_per_sample() function. In the meanwhile we prefer to adopt
this variant, since avoids divisions by 8 all over the place.
This commit is contained in:
Stefano Sabatini
2011-06-06 01:14:50 +02:00
committed by Justin Ruggles
parent 2f37321abc
commit a6703faa15
4 changed files with 29 additions and 4 deletions
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4
doc/APIchanges
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@@ -13,6 +13,10 @@ libavutil: 2011-04-18
API changes, most recent first:
2011-06-07 - xxxxxxx - lavu 51.4.0 - av_get_bytes_per_sample()
Add av_get_bytes_per_sample() in libavutil/samplefmt.h.
Deprecate av_get_bits_per_sample_fmt().
2011-06-xx - xxxxxxx - lavu 51.3.0 - opt.h
Add av_opt_free convenience function.

5
libavutil/avutil.h
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@@ -40,7 +40,7 @@
#define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
#define LIBAVUTIL_VERSION_MAJOR 51
#define LIBAVUTIL_VERSION_MINOR 3
#define LIBAVUTIL_VERSION_MINOR 4
#define LIBAVUTIL_VERSION_MICRO 0
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
@@ -57,6 +57,9 @@
* Those FF_API_* defines are not part of public API.
* They may change, break or disappear at any time.
*/
#ifndef FF_API_GET_BITS_PER_SAMPLE_FMT
#define FF_API_GET_BITS_PER_SAMPLE_FMT (LIBAVUTIL_VERSION_MAJOR < 52)
#endif
/**
* Return the LIBAVUTIL_VERSION_INT constant.

8
libavutil/samplefmt.c
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@@ -66,8 +66,16 @@ char *av_get_sample_fmt_string (char *buf, int buf_size, enum AVSampleFormat sam
return buf;
}
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
{
return sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB ?
0 : sample_fmt_info[sample_fmt].bits >> 3;
}
#if FF_API_GET_BITS_PER_SAMPLE_FMT
int av_get_bits_per_sample_fmt(enum AVSampleFormat sample_fmt)
{
return sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB ?
0 : sample_fmt_info[sample_fmt].bits;
}
#endif

16
libavutil/samplefmt.h
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@@ -19,6 +19,8 @@
#ifndef AVUTIL_SAMPLEFMT_H
#define AVUTIL_SAMPLEFMT_H
#include "avutil.h"
/**
* all in native-endian format
*/
@@ -58,13 +60,21 @@ enum AVSampleFormat av_get_sample_fmt(const char *name);
*/
char *av_get_sample_fmt_string(char *buf, int buf_size, enum AVSampleFormat sample_fmt);
#if FF_API_GET_BITS_PER_SAMPLE_FMT
/**
* Return sample format bits per sample.
* @deprecated Use av_get_bytes_per_sample() instead.
*/
attribute_deprecated
int av_get_bits_per_sample_fmt(enum AVSampleFormat sample_fmt);
#endif
/**
* Return number of bytes per sample.
*
* @param sample_fmt the sample format
* @return number of bits per sample or zero if unknown for the given
* @return number of bytes per sample or zero if unknown for the given
* sample format
*/
int av_get_bits_per_sample_fmt(enum AVSampleFormat sample_fmt);
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt);
#endif /* AVUTIL_SAMPLEFMT_H */