[linux-audio-dev] timemachine auto recorder patch

Hello, I have created a patch that allows timeachine to automatically start and stop recording based on the audio signal. Recording will start when a sample value exceeds a start threashold. Recording stops when sample values remain below a stop threashold for a period of time. Recording of a new file will then start again when a sample value again exceeds the start threashold. These values as well as enabeling auto recording can all be set at the command line. With this functionallity I would like to be able to launch timemachine backgrounded. Eg: timemachine args & I would also need to be able to send the process SIGINT and SIGTERM signals and have it exit gracefully. I have attempted to add the necessary handlers for this. However if I try to start timemachine backgrounded it just seems to exit and brings jack down with it. If I run it in the foreground and try to killall timemachine it does not exit gracefully but brings jack down as well. In either case I see output from jack like: subgraph starting at time timed out (subgraph_wait_fd = 7, status = 0, state = Triggered) jackd watchdog: timeout - killed jack [1]+ Killed timemachine Any suggestions or ideas are greatly appreciated. Also, the auto recorder functionallity works great asside from the backgrounding and SIGTERM business. Thanks! -Garett PATCH FOLLOWS diff -urN timemachine-0.3.1/src/main.c timemachine-0.3.1.autorecord/src/main.c --- timemachine-0.3.1/src/main.c 2005-09-19 03:41:30.000000000 -0600 +++ timemachine-0.3.1.autorecord/src/main.c 2006-01-14 11:24:13.000000000 -0700 @@ -28,6 +28,10 @@ #include <sndfile.h> #include <gtk/gtk.h> +/* garetts mod here */ +#include <signal.h> +/* end garetts mod */ + #ifdef HAVE_LASH #include <lash/lash.h> @@ -71,6 +75,10 @@ GdkPixbuf *img_on, *img_off, *img_busy; GdkPixbuf *icon_on, *icon_off; +/* garetts mod here */ +void signal_handler(int signal); +/* end garetts mod */ + int main(int argc, char *argv[]) { unsigned int i; @@ -78,13 +86,22 @@ int help = 0; int console = 0; char port_name[32]; + /* garetts mod here */ + int AUTO_RECORD = 0; + signal(SIGINT, signal_handler); + signal(SIGTERM, signal_handler); + float SECONDS_OF_SILENCE_BEFORE_STOP = 5; + float START_THREASHOLD = 0.000005; + float STOP_THREASHOLD = 0; + /* end garetts mod */ + pthread_t dt; #ifdef HAVE_LASH lash_args_t *lash_args = lash_extract_args(&argc, &argv); lash_event_t *event; #endif - while ((opt = getopt(argc, argv, "hic:t:n:p:f:")) != -1) { + while ((opt = getopt(argc, argv, "hic:t:n:p:f:q:w:e:r")) != -1) { switch (opt) { case 'h': help = 1; @@ -111,6 +128,20 @@ case 'f': format_name = optarg; break; + /* garetts mod here */ + case 'q': + SECONDS_OF_SILENCE_BEFORE_STOP = atof(optarg); + break; + case 'w': + START_THREASHOLD = atof(optarg); + break; + case 'e': + STOP_THREASHOLD = atof(optarg); + break; + case 'r': + AUTO_RECORD = 1; + break; + /* end garetts mod */ default: num_ports = 0; break; @@ -132,6 +163,9 @@ fprintf(stderr, "\t-t\tspecify the pre-recording buffer length\n"); fprintf(stderr, "\t-p\tspecify the saved file prefix, may include path\n"); fprintf(stderr, "\t-f\tspecify the saved file format\n"); + fprintf(stderr, "\t-q\tspecify the seconds of silence before stop\n"); + fprintf(stderr, "\t-w\tspecify the start threashold\n"); + fprintf(stderr, "\t-e\tspecify the stop threashold\n"); fprintf(stderr, "\n"); fprintf(stderr, "\tchannels must be in the range 1-8, default %d\n", DEFAULT_NUM_PORTS); @@ -164,7 +198,10 @@ } DEBUG(1, "registering as %s\n", client_name); - process_init(buf_length); + /* garetts mod here + * process_init(buf_length) + */ + process_init(buf_length, SECONDS_OF_SILENCE_BEFORE_STOP, START_THREASHOLD, STOP_THREASHOLD, AUTO_RECORD); #ifdef HAVE_LASH lash_client = lash_init (lash_args, "TimeMachine", @@ -287,6 +324,11 @@ exit(0); } +void signal_handler(int iSignal) { + recording_stop(); + cleanup(); +} + #ifdef HAVE_LASH gboolean idle_cb(gpointer data) { diff -urN timemachine-0.3.1/src/threads.c timemachine-0.3.1.autorecord/src/threads.c --- timemachine-0.3.1/src/threads.c 2005-07-18 08:03:06.000000000 -0600 +++ timemachine-0.3.1.autorecord/src/threads.c 2006-01-14 10:58:18.000000000 -0700 @@ -19,7 +19,7 @@ #include <string.h> #include <stdio.h> #include <unistd.h> -#include <time.h> +#include <sys/time.h> #include <sndfile.h> #include <jack/jack.h> #include <gtk/gtk.h> @@ -46,6 +46,15 @@ static unsigned int disk_read_pos = 0; static unsigned int disk_write_pos = 0; +/* garetts mod here */ +static float seconds_of_silence_before_stop = 0; +static float start_threashold = 0; +static float stop_threashold = 0; +static float seconds_of_silence = 0; +static int sample_rate = 0; +static int autorecord = 0; +/* end garetts mod */ + /* Peak data for meters */ static volatile float peak[MAX_PORTS]; @@ -69,6 +78,32 @@ fprintf(stderr, "bad buffer!\n"); break; } + + /* garetts mod here */ + if (autorecord) { + if (rec) { + for (i = 0; i < nframes; i++) { + if (fabsf(in[i]) <= stop_threashold) { + seconds_of_silence = seconds_of_silence + 1.0/sample_rate; + } + else { + seconds_of_silence = 0; + } + if (seconds_of_silence > seconds_of_silence_before_stop) { + recording_stop(); + } + } + } + else { + for (i = 0; i < nframes; i++) { + if (fabsf(in[i]) > start_threashold) { + recording_start(); + break; + } + } + } + } + /* end garetts mod */ for (i = 0; i < nframes; i++) { if (fabsf(in[i]) > peak[port]) { @@ -202,7 +236,10 @@ return 0; } -void process_init(unsigned int time) +/* garetts mod here + * void process_init(unsigned int time) + */ +void process_init(unsigned int time, float secs_of_silence_before_stop, float strt_threashold, float stp_threashold, int use_autorecord) { unsigned int port; @@ -220,6 +257,14 @@ pre_size = time * jack_get_sample_rate(client); pre_time = time; + /* garetts mod here */ + seconds_of_silence_before_stop = secs_of_silence_before_stop; + start_threashold = strt_threashold; + stop_threashold = stp_threashold; + sample_rate = jack_get_sample_rate(client); + autorecord = use_autorecord; + /* end garetts mod */ + for (port = 0; port < num_ports; port++) { pre_buffer[port] = calloc(pre_size, sizeof(float)); disk_buffer[port] = calloc(DISK_SIZE, sizeof(float)); diff -urN timemachine-0.3.1/src/threads.h timemachine-0.3.1.autorecord/src/threads.h --- timemachine-0.3.1/src/threads.h 2005-07-18 08:03:06.000000000 -0600 +++ timemachine-0.3.1.autorecord/src/threads.h 2006-01-14 10:56:37.000000000 -0700 @@ -9,7 +9,10 @@ int process(jack_nframes_t nframes, void *arg); -void process_init(unsigned int time); +/* garetts mod here + * void process_init(unsigned int time) + */ +void process_init(unsigned int time, float secs_of_silence_before_stop, float strt_threashold, float stp_threashold, int use_autorecord); int writer_thread(void *d);