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submodule
ffmpeg
Commits
142e740d
Commit
142e740d
authored
May 06, 2012
by
Anton Khirnov
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samplefmt: add a function for copying audio samples.
parent
96843413
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2 changed files
with
34 additions
and
0 deletions
+34
-0
samplefmt.c
libavutil/samplefmt.c
+19
-0
samplefmt.h
libavutil/samplefmt.h
+15
-0
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libavutil/samplefmt.c
View file @
142e740d
...
...
@@ -185,3 +185,22 @@ int av_samples_alloc(uint8_t **audio_data, int *linesize, int nb_channels,
}
return
0
;
}
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
)
{
int
planar
=
av_sample_fmt_is_planar
(
sample_fmt
);
int
planes
=
planar
?
nb_channels
:
1
;
int
block_align
=
av_get_bytes_per_sample
(
sample_fmt
)
*
(
planar
?
1
:
nb_channels
);
int
data_size
=
nb_samples
*
block_align
;
int
i
;
dst_offset
*=
block_align
;
src_offset
*=
block_align
;
for
(
i
=
0
;
i
<
planes
;
i
++
)
memcpy
(
dst
[
i
]
+
dst_offset
,
src
[
i
]
+
src_offset
,
data_size
);
return
0
;
}
libavutil/samplefmt.h
View file @
142e740d
...
...
@@ -194,4 +194,19 @@ int av_samples_fill_arrays(uint8_t **audio_data, int *linesize,
int
av_samples_alloc
(
uint8_t
**
audio_data
,
int
*
linesize
,
int
nb_channels
,
int
nb_samples
,
enum
AVSampleFormat
sample_fmt
,
int
align
);
/**
* Copy samples from src to dst.
*
* @param dst destination array of pointers to data planes
* @param src source array of pointers to data planes
* @param dst_offset offset in samples at which the data will be written to dst
* @param src_offset offset in samples at which the data will be read from src
* @param nb_samples number of samples to be copied
* @param nb_channels number of audio channels
* @param sample_fmt audio sample format
*/
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
);
#endif
/* AVUTIL_SAMPLEFMT_H */
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