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tinycap: support 24 bit capture

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This commit is contained in:
Simon Wilson
2013-07-17 10:31:53 -07:00
parent 7136cf7c86
commit 4f4967888f
1 changed files with 25 additions and 10 deletions
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tinycap.c
+25 -10
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@@ -60,7 +60,7 @@ int capturing = 1;
unsigned int capture_sample(FILE *file, unsigned int card, unsigned int device,
unsigned int channels, unsigned int rate,
unsigned int bits, unsigned int period_size,
enum pcm_format format, unsigned int period_size,
unsigned int period_count);
void sigint_handler(int sig)
@@ -80,6 +80,7 @@ int main(int argc, char **argv)
unsigned int frames;
unsigned int period_size = 1024;
unsigned int period_count = 4;
enum pcm_format format;
if (argc < 2) {
fprintf(stderr, "Usage: %s file.wav [-D card] [-d device] [-c channels] "
@@ -137,7 +138,23 @@ int main(int argc, char **argv)
header.audio_format = FORMAT_PCM;
header.num_channels = channels;
header.sample_rate = rate;
header.bits_per_sample = bits;
switch (bits) {
case 32:
format = PCM_FORMAT_S32_LE;
break;
case 24:
format = PCM_FORMAT_S24_LE;
break;
case 16:
format = PCM_FORMAT_S16_LE;
break;
default:
fprintf(stderr, "%d bits is not supported.\n", bits);
return 1;
}
header.bits_per_sample = pcm_format_to_bits(format);
header.byte_rate = (header.bits_per_sample / 8) * channels * rate;
header.block_align = channels * (header.bits_per_sample / 8);
header.data_id = ID_DATA;
@@ -148,7 +165,7 @@ int main(int argc, char **argv)
/* install signal handler and begin capturing */
signal(SIGINT, sigint_handler);
frames = capture_sample(file, card, device, header.num_channels,
header.sample_rate, header.bits_per_sample,
header.sample_rate, format,
period_size, period_count);
printf("Captured %d frames\n", frames);
@@ -165,7 +182,7 @@ int main(int argc, char **argv)
unsigned int capture_sample(FILE *file, unsigned int card, unsigned int device,
unsigned int channels, unsigned int rate,
unsigned int bits, unsigned int period_size,
enum pcm_format format, unsigned int period_size,
unsigned int period_count)
{
struct pcm_config config;
@@ -178,10 +195,7 @@ unsigned int capture_sample(FILE *file, unsigned int card, unsigned int device,
config.rate = rate;
config.period_size = period_size;
config.period_count = period_count;
if (bits == 32)
config.format = PCM_FORMAT_S32_LE;
else if (bits == 16)
config.format = PCM_FORMAT_S16_LE;
config.format = format;
config.start_threshold = 0;
config.stop_threshold = 0;
config.silence_threshold = 0;
@@ -202,7 +216,8 @@ unsigned int capture_sample(FILE *file, unsigned int card, unsigned int device,
return 0;
}
printf("Capturing sample: %u ch, %u hz, %u bit\n", channels, rate, bits);
printf("Capturing sample: %u ch, %u hz, %u bit\n", channels, rate,
pcm_format_to_bits(format));
while (capturing && !pcm_read(pcm, buffer, size)) {
if (fwrite(buffer, 1, size, file) != size) {
@@ -214,6 +229,6 @@ unsigned int capture_sample(FILE *file, unsigned int card, unsigned int device,
free(buffer);
pcm_close(pcm);
return bytes_read / ((bits / 8) * channels);
return pcm_bytes_to_frames(pcm, bytes_read);
}