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https://github.com/alsa-project/alsa-utils
synced 2024-09-19 17:49:59 +02:00
aplay - Add stereo VU-meter support
Added the support of stereo VU-meter. Enabled via -Vs option. The new option, -V, can be used to enable the VU-meter. Now VU-meter can be enabled even without -vv.
This commit is contained in:
Takashi Iwai
parent
4bdb0adef1
commit
c58817e8af
2 changed files with 153 additions and 40 deletions
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@ -114,6 +114,11 @@ Show PCM structure and setup.
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This option is accumulative. The VU meter is displayed when this
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is given twice or three times.
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.TP
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\fI\-V, \-\-vumeter=TYPE\fP
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Specifies the VU-meter type, either \fIstereo\fP or \fImono\fP.
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The stereo VU-meter is available only for 2-channel stereo samples
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with interleaved format.
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.TP
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\fI\-I, \-\-separate\-channels\fP
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One file for each channel
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188
aplay/aplay.c
188
aplay/aplay.c
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@ -71,6 +71,12 @@ static snd_pcm_sframes_t (*writei_func)(snd_pcm_t *handle, const void *buffer, s
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static snd_pcm_sframes_t (*readn_func)(snd_pcm_t *handle, void **bufs, snd_pcm_uframes_t size);
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static snd_pcm_sframes_t (*writen_func)(snd_pcm_t *handle, void **bufs, snd_pcm_uframes_t size);
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enum {
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VUMETER_NONE,
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VUMETER_MONO,
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VUMETER_STEREO
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};
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static char *command;
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static snd_pcm_t *handle;
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static struct {
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@ -96,6 +102,7 @@ static int avail_min = -1;
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static int start_delay = 0;
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static int stop_delay = 0;
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static int verbose = 0;
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static int vumeter = VUMETER_NONE;
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static int buffer_pos = 0;
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static size_t bits_per_sample, bits_per_frame;
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static size_t chunk_bytes;
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@ -174,6 +181,7 @@ _("Usage: %s [OPTION]... [FILE]...\n"
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" (relative to buffer size if <= 0)\n"
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"-T, --stop-delay=# delay for automatic PCM stop is # microseconds from xrun\n"
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"-v, --verbose show PCM structure and setup (accumulative)\n"
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"-V, --vumeter=TYPE enable VU meter (TYPE: mono or stereo)\n"
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"-I, --separate-channels one file for each channel\n"
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" --disable-resample disable automatic rate resample\n"
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" --disable-channels disable automatic channel conversions\n"
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@ -345,7 +353,7 @@ enum {
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int main(int argc, char *argv[])
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{
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int option_index;
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char *short_options = "hnlLD:qt:c:f:r:d:MNF:A:R:T:B:vIPC";
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char *short_options = "hnlLD:qt:c:f:r:d:MNF:A:R:T:B:vV:IPC";
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static struct option long_options[] = {
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{"help", 0, 0, 'h'},
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{"version", 0, 0, OPT_VERSION},
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@ -369,6 +377,7 @@ int main(int argc, char *argv[])
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{"buffer-time", 1, 0, 'B'},
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{"buffer-size", 1, 0, OPT_BUFFER_SIZE},
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{"verbose", 0, 0, 'v'},
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{"vumeter", 1, 0, 'V'},
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{"separate-channels", 0, 0, 'I'},
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{"playback", 0, 0, 'P'},
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{"capture", 0, 0, 'C'},
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@ -514,6 +523,16 @@ int main(int argc, char *argv[])
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break;
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case 'v':
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verbose++;
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if (verbose > 1 && !vumeter)
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vumeter = VUMETER_MONO;
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break;
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case 'V':
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if (*optarg == 's')
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vumeter = VUMETER_STEREO;
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else if (*optarg == 'm')
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vumeter = VUMETER_MONO;
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else
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vumeter = VUMETER_NONE;
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break;
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case 'M':
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mmap_flag = 1;
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@ -1048,6 +1067,12 @@ static void set_params(void)
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exit(EXIT_FAILURE);
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}
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// fprintf(stderr, "real chunk_size = %i, frags = %i, total = %i\n", chunk_size, setup.buf.block.frags, setup.buf.block.frags * chunk_size);
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/* stereo VU-meter isn't always available... */
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if (vumeter == VUMETER_STEREO) {
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if (hwparams.channels != 2 || !interleaved || verbose > 2)
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vumeter = VUMETER_MONO;
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}
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}
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#ifndef timersub
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@ -1133,23 +1158,101 @@ static void suspend(void)
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fprintf(stderr, _("Done.\n"));
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}
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static void print_vu_meter_mono(int perc, int maxperc)
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{
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const int bar_length = 50;
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char line[80];
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int val;
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for (val = 0; val <= perc * bar_length / 100 && val < bar_length; val++)
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line[val] = '#';
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for (; val <= maxperc * bar_length / 100 && val < bar_length; val++)
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line[val] = ' ';
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line[val] = '+';
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for (++val; val <= bar_length; val++)
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line[val] = ' ';
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if (maxperc > 99)
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sprintf(line + val, "| MAX");
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else
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sprintf(line + val, "| %02i%%", maxperc);
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fputs(line, stdout);
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if (perc > 100)
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printf(_(" !clip "));
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}
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static void print_vu_meter_stereo(int *perc, int *maxperc)
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{
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const int bar_length = 35;
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char line[80];
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int c;
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memset(line, ' ', sizeof(line) - 1);
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line[bar_length + 3] = '|';
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for (c = 0; c < 2; c++) {
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int p = perc[c] * bar_length / 100;
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char tmp[4];
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if (p > bar_length)
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p = bar_length;
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if (c)
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memset(line + bar_length + 6 + 1, '#', p);
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else
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memset(line + bar_length - p - 1, '#', p);
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p = maxperc[c] * bar_length / 100;
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if (p > bar_length)
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p = bar_length;
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if (c)
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line[bar_length + 6 + 1 + p] = '+';
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else
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line[bar_length - p - 1] = '+';
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if (maxperc[c] > 99)
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sprintf(tmp, "MAX");
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else
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sprintf(tmp, "%02d%%", maxperc[c]);
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if (c)
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memcpy(line + bar_length + 3 + 1, tmp, 3);
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else
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memcpy(line + bar_length, tmp, 3);
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}
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line[bar_length * 2 + 6 + 2] = 0;
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fputs(line, stdout);
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}
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static void print_vu_meter(signed int *perc, signed int *maxperc)
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{
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if (vumeter == VUMETER_STEREO)
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print_vu_meter_stereo(perc, maxperc);
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else
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print_vu_meter_mono(*perc, *maxperc);
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}
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/* peak handler */
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static void compute_max_peak(u_char *data, size_t count)
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{
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signed int val, max, max_peak = 0, perc;
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signed int val, max, perc[2], max_peak[2];
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static int run = 0;
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size_t ocount = count;
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int format_little_endian = snd_pcm_format_little_endian(hwparams.format);
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int ichans, c;
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if (vumeter == VUMETER_STEREO)
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ichans = 2;
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else
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ichans = 1;
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memset(max_peak, 0, sizeof(max_peak));
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switch (bits_per_sample) {
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case 8: {
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signed char *valp = (signed char *)data;
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signed char mask = snd_pcm_format_silence(hwparams.format);
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c = 0;
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while (count-- > 0) {
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val = *valp++ ^ mask;
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val = abs(val);
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if (max_peak < val)
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max_peak = val;
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if (max_peak[c] < val)
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max_peak[c] = val;
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if (vumeter == VUMETER_STEREO)
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c = !c;
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}
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break;
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}
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@ -1159,14 +1262,18 @@ static void compute_max_peak(u_char *data, size_t count)
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signed short sval;
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count /= 2;
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c = 0;
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while (count-- > 0) {
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if (format_little_endian)
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sval = __le16_to_cpu(*valp);
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else sval = __be16_to_cpu(*valp);
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else
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sval = __be16_to_cpu(*valp);
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sval = abs(sval) ^ mask;
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if (max_peak < sval)
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max_peak = sval;
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if (max_peak[c] < sval)
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max_peak[c] = sval;
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valp++;
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if (vumeter == VUMETER_STEREO)
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c = !c;
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}
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break;
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}
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@ -1175,6 +1282,7 @@ static void compute_max_peak(u_char *data, size_t count)
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signed int mask = snd_pcm_format_silence_32(hwparams.format);
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count /= 3;
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c = 0;
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while (count-- > 0) {
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if (format_little_endian) {
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val = valp[0] | (valp[1]<<8) | (valp[2]<<16);
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@ -1186,24 +1294,31 @@ static void compute_max_peak(u_char *data, size_t count)
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val |= 0xff<<24; /* Negate upper bits too */
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}
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val = abs(val) ^ mask;
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if (max_peak < val)
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max_peak = val;
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if (max_peak[c] < val)
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max_peak[c] = val;
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valp += 3;
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if (vumeter == VUMETER_STEREO)
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c = !c;
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}
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break;
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}
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case 32: {
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signed int *valp = (signed int *)data;
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signed int mask = snd_pcm_format_silence_32(hwparams.format);
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count /= 4;
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c = 0;
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while (count-- > 0) {
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if (format_little_endian)
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val = __le32_to_cpu(*valp);
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else val = __be32_to_cpu(*valp);
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else
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val = __be32_to_cpu(*valp);
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val = abs(val) ^ mask;
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if (max_peak < val)
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max_peak = val;
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if (max_peak[c] < val)
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max_peak[c] = val;
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valp++;
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if (vumeter == VUMETER_STEREO)
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c = !c;
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}
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break;
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}
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@ -1218,45 +1333,38 @@ static void compute_max_peak(u_char *data, size_t count)
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if (max <= 0)
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max = 0x7fffffff;
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if (bits_per_sample > 16)
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perc = max_peak / (max / 100);
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else
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perc = max_peak * 100 / max;
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for (c = 0; c < ichans; c++) {
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if (bits_per_sample > 16)
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perc[c] = max_peak[c] / (max / 100);
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else
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perc[c] = max_peak[c] * 100 / max;
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}
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if(verbose<=2) {
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static int maxperc=0;
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if (interleaved && verbose <= 2) {
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static int maxperc[2];
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static time_t t=0;
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const time_t tt=time(NULL);
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if(tt>t) {
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t=tt;
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maxperc=0;
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maxperc[0] = 0;
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maxperc[1] = 0;
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}
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if(perc>maxperc)
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maxperc=perc;
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for (c = 0; c < ichans; c++)
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if (perc[c] > maxperc[c])
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maxperc[c] = perc[c];
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putchar('\r');
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for (val = 0; val <= perc / 2 && val < 50; val++)
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putchar('#');
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for (; val <= maxperc / 2 && val < 50; val++)
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putchar(' ');
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putchar('+');
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for (++val; val <= 50; val++)
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putchar(' ');
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printf("| %02i%%", maxperc);
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if (perc>99)
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printf(_(" !clip "));
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print_vu_meter(perc, maxperc);
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fflush(stdout);
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}
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else if(verbose==3) {
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printf(_("Max peak (%li samples): 0x%08x "), (long)ocount, max_peak);
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printf(_("Max peak (%li samples): 0x%08x "), (long)ocount, max_peak[0]);
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for (val = 0; val < 20; val++)
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if (val <= perc / 5)
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if (val <= perc[0] / 5)
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putchar('#');
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else
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putchar(' ');
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printf(" %i%%\n", perc);
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printf(" %i%%\n", perc[0]);
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fflush(stdout);
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}
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}
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@ -1287,7 +1395,7 @@ static ssize_t pcm_write(u_char *data, size_t count)
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exit(EXIT_FAILURE);
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}
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if (r > 0) {
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if (verbose > 1)
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if (vumeter)
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compute_max_peak(data, r * hwparams.channels);
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result += r;
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count -= r;
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@ -1328,7 +1436,7 @@ static ssize_t pcm_writev(u_char **data, unsigned int channels, size_t count)
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exit(EXIT_FAILURE);
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}
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if (r > 0) {
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if (verbose > 1) {
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if (vumeter) {
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for (channel = 0; channel < channels; channel++)
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compute_max_peak(data[channel], r);
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}
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@ -1366,7 +1474,7 @@ static ssize_t pcm_read(u_char *data, size_t rcount)
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exit(EXIT_FAILURE);
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}
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if (r > 0) {
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if (verbose > 1)
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if (vumeter)
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compute_max_peak(data, r * hwparams.channels);
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result += r;
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count -= r;
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@ -1404,7 +1512,7 @@ static ssize_t pcm_readv(u_char **data, unsigned int channels, size_t rcount)
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exit(EXIT_FAILURE);
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}
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if (r > 0) {
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if (verbose > 1) {
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if (vumeter) {
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for (channel = 0; channel < channels; channel++)
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compute_max_peak(data[channel], r);
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}
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