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bat: Add 'readcapture' option to support analyzing external audio

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If audio data is captured on another device (ie we are NOT using
loopback mode), then allow alsabat to analyze that data, by passing
a filename reference on the command line.

Add the '--readcapture' option to the argument parser. When
this option is specified, avoid doing a local capture, and instead
just read the audio data from the indicated file, and analyze that.

Fixes: https://github.com/alsa-project/alsa-utils/pull/166
Signed-off-by: Tim Bird <tim.bird@sony.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Tim Bird 2022-05-17 09:50:49 -06:00 committed by Jaroslav Kysela
parent e3d30315ff
commit 9e525074d2
2 changed files with 20 additions and 0 deletions
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17
bat/bat.c
View file

@ -331,6 +331,8 @@ _("Usage: alsabat [-options]...\n"
" --log=# file that both stdout and strerr redirecting to\n"
" --file=# file for playback\n"
" --saveplay=# file that storing playback content, for debug\n"
" --readcapture=# file with previously captured content. File data\n"
" is used for analysis instead of capturing it.\n"
" --local internal loop, set to bypass pcm hardware devices\n"
" --standalone standalone mode, to bypass analysis\n"
" --roundtriplatency round trip latency mode\n"
@ -397,6 +399,7 @@ static void parse_arguments(struct bat *bat, int argc, char *argv[])
{"roundtriplatency", 0, 0, OPT_ROUNDTRIPLATENCY},
{"snr-db", 1, 0, OPT_SNRTHD_DB},
{"snr-pc", 1, 0, OPT_SNRTHD_PC},
{"readcapture", 1, 0, OPT_READCAPTURE},
{0, 0, 0, 0}
};
@ -412,6 +415,11 @@ static void parse_arguments(struct bat *bat, int argc, char *argv[])
case OPT_SAVEPLAY:
bat->debugplay = optarg;
break;
case OPT_READCAPTURE:
bat->capturefile = optarg;
bat->capture.mode = MODE_ANALYZE_ONLY;
bat->playback.mode = MODE_ANALYZE_ONLY;
break;
case OPT_LOCAL:
bat->local = true;
break;
@ -708,6 +716,15 @@ int main(int argc, char *argv[])
goto analyze;
}
if (bat.capture.mode == MODE_ANALYZE_ONLY && bat.capturefile) {
bat.capture.file = strdup(bat.capturefile);
fprintf(bat.log,
_("Using data from file %s for analysis\n"),
bat.capture.file);
fprintf(bat.log, _("Skipping playback and capture\n"));
goto analyze;
}
/* loopback thread: playback and capture in a loop */
if (bat.local == false)
test_loopback(&bat);

3
bat/common.h
View file

@ -25,6 +25,7 @@
#define OPT_ROUNDTRIPLATENCY (OPT_BASE + 6)
#define OPT_SNRTHD_DB (OPT_BASE + 7)
#define OPT_SNRTHD_PC (OPT_BASE + 8)
#define OPT_READCAPTURE (OPT_BASE + 9)
#define COMPOSE(a, b, c, d) ((a) | ((b)<<8) | ((c)<<16) | ((d)<<24))
#define WAV_RIFF COMPOSE('R', 'I', 'F', 'F')
@ -151,6 +152,7 @@ enum _bat_op_mode {
MODE_UNKNOWN = -1,
MODE_SINGLE = 0,
MODE_LOOPBACK,
MODE_ANALYZE_ONLY,
MODE_LAST
};
@ -223,6 +225,7 @@ struct bat {
char *narg; /* argument string of duration */
char *logarg; /* path name of log file */
char *debugplay; /* path name to store playback signal */
char *capturefile; /* path name for previously saved recording */
bool standalone; /* enable to bypass analysis */
bool roundtriplatency; /* enable round trip latency */