lineage-rockchip/android_external_alsa-utils
1
0
Fork 0
Code Activity Actions

aplay: add support for G.711 A_LAW enconding in AU file format

Browse source 
At the time being, aplay only supports G.711 µ-law, 8-bits PCM and
16-bits PCM encodings for the AU format while the AU format supports
many more.

In Europe the most G.711 used encoding is the A-law, which is also
part of the encodings supported by the AU file format.

Add support for that encoding in aplay.

Closes: https://github.com/alsa-project/alsa-utils/pull/297
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Christophe Leroy 2025-04-02 08:07:18 +02:00 • committed by Jaroslav Kysela
parent 254528c427
commit 502340490f
2 changed files with 10 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

9
aplay/aplay.c
View file

@ -1245,6 +1245,12 @@ static int test_au(int fd, void *buffer)
fprintf(stderr, _("Warning: format is changed to S16_BE\n"));
hwparams.format = SND_PCM_FORMAT_S16_BE;
break;
case AU_FMT_ALAW:
if (hwparams.format != DEFAULT_FORMAT &&
hwparams.format != SND_PCM_FORMAT_A_LAW)
fprintf(stderr, _("Warning: format is changed to A_LAW\n"));
hwparams.format = SND_PCM_FORMAT_A_LAW;
break;
default:
return -1;
}
@ -2787,6 +2793,9 @@ static void begin_au(int fd, size_t cnt)
case SND_PCM_FORMAT_S16_BE:
ah.encoding = BE_INT(AU_FMT_LIN16);
break;
case SND_PCM_FORMAT_A_LAW:
ah.encoding = BE_INT(AU_FMT_ALAW);
break;
default:
error(_("Sparc Audio doesn't support %s format..."), snd_pcm_format_name(hwparams.format));
prg_exit(EXIT_FAILURE);

1
aplay/formats.h
View file

@ -120,6 +120,7 @@ typedef struct {
#define AU_FMT_ULAW 1
#define AU_FMT_LIN8 2
#define AU_FMT_LIN16 3
#define AU_FMT_ALAW 27
typedef struct au_header {
uint32_t magic; /* '.snd' */