From: "vivian,zhang" vivian.zhang@intel.com

Add buffer size and period size settings in alsabat. With -E and -B options, alsabat performs the test with specified buffer size and period size

Signed-off-by: Zhang Vivian vivian.zhang@intel.com ---

Changes in v2: - Use a micro for min and max values of buffer size and period size - Use a micro for default period size in tinyalsa.c

bat/alsa.c | 95 +++++++++++++++++++++++++++++++++++++++----------------- bat/bat.c | 18 +++++++++-- bat/common.h | 8 +++++ bat/tinyalsa.c | 5 ++- 4 files changed, 94 insertions(+), 32 deletions(-)

diff --git a/bat/alsa.c b/bat/alsa.c index 75158cb..0a37714 100644 --- a/bat/alsa.c +++ b/bat/alsa.c @@ -74,6 +74,8 @@ static int set_snd_pcm_params(struct bat *bat, struct pcm_container *sndpcm) snd_pcm_format_t format; unsigned int buffer_time = 0; unsigned int period_time = 0; + snd_pcm_uframes_t buffer_size = 0; + snd_pcm_uframes_t period_size = 0; unsigned int rate; int err; const char *device_name = snd_pcm_name(sndpcm->handle); @@ -145,39 +147,71 @@ static int set_snd_pcm_params(struct bat *bat, struct pcm_container *sndpcm) return -EINVAL; }

- if (snd_pcm_hw_params_get_buffer_time_max(params, - &buffer_time, 0) < 0) { - fprintf(bat->err, _("Get parameter from device error: ")); - fprintf(bat->err, _("buffer time: %d %s: %s(%d)\n"), - buffer_time, - device_name, snd_strerror(err), err); - return -EINVAL; - } + if (bat->buffer_size > 0 && bat->period_size == 0) + bat->period_size = bat->buffer_size / DIV_BUFFERTIME;

- if (buffer_time > MAX_BUFFERTIME) - buffer_time = MAX_BUFFERTIME; + if (bat->buffer_size > 0) { + buffer_size = bat->buffer_size; + period_size = bat->period_size;

- period_time = buffer_time / DIV_BUFFERTIME; + fprintf(bat->log, _("Set period size: %d buffer size: %d\n"), + (int) period_size, (int) buffer_size);

- /* Set buffer time and period time */ - err = snd_pcm_hw_params_set_buffer_time_near(sndpcm->handle, params, - &buffer_time, 0); - if (err < 0) { - fprintf(bat->err, _("Set parameter to device error: ")); - fprintf(bat->err, _("buffer time: %d %s: %s(%d)\n"), - buffer_time, - device_name, snd_strerror(err), err); - return err; - } + err = snd_pcm_hw_params_set_buffer_size_near(sndpcm->handle, + params, &buffer_size); + if (err < 0) { + fprintf(bat->err, _("Set parameter to device error: ")); + fprintf(bat->err, _("buffer size: %d %s: %s(%d)\n"), + (int) buffer_size, + device_name, snd_strerror(err), err); + return err; + }

- err = snd_pcm_hw_params_set_period_time_near(sndpcm->handle, params, - &period_time, 0); - if (err < 0) { - fprintf(bat->err, _("Set parameter to device error: ")); - fprintf(bat->err, _("period time: %d %s: %s(%d)\n"), - period_time, - device_name, snd_strerror(err), err); - return err; + err = snd_pcm_hw_params_set_period_size_near(sndpcm->handle, + params, &period_size, 0); + if (err < 0) { + fprintf(bat->err, _("Set parameter to device error: ")); + fprintf(bat->err, _("period size: %d %s: %s(%d)\n"), + (int) period_size, + device_name, snd_strerror(err), err); + return err; + } + } else { + if (snd_pcm_hw_params_get_buffer_time_max(params, + &buffer_time, 0) < 0) { + fprintf(bat->err, + _("Get parameter from device error: ")); + fprintf(bat->err, _("buffer time: %d %s: %s(%d)\n"), + buffer_time, + device_name, snd_strerror(err), err); + return -EINVAL; + } + + if (buffer_time > MAX_BUFFERTIME) + buffer_time = MAX_BUFFERTIME; + + period_time = buffer_time / DIV_BUFFERTIME; + + /* Set buffer time and period time */ + err = snd_pcm_hw_params_set_buffer_time_near(sndpcm->handle, + params, &buffer_time, 0); + if (err < 0) { + fprintf(bat->err, _("Set parameter to device error: ")); + fprintf(bat->err, _("buffer time: %d %s: %s(%d)\n"), + buffer_time, + device_name, snd_strerror(err), err); + return err; + } + + err = snd_pcm_hw_params_set_period_time_near(sndpcm->handle, + params, &period_time, 0); + if (err < 0) { + fprintf(bat->err, _("Set parameter to device error: ")); + fprintf(bat->err, _("period time: %d %s: %s(%d)\n"), + period_time, + device_name, snd_strerror(err), err); + return err; + } }

/* Write the parameters to the driver */ @@ -214,6 +248,9 @@ static int set_snd_pcm_params(struct bat *bat, struct pcm_container *sndpcm) return -EINVAL; }

+ fprintf(bat->log, _("Get period size: %d buffer size: %d\n"), + (int) sndpcm->period_size, (int) sndpcm->buffer_size); + err = snd_pcm_format_physical_width(format); if (err < 0) { fprintf(bat->err, _("Invalid parameters: ")); diff --git a/bat/bat.c b/bat/bat.c index 1afdcb4..cd4ea2d 100644 --- a/bat/bat.c +++ b/bat/bat.c @@ -292,6 +292,8 @@ _("Usage: alsabat [-options]...\n" " -k parameter for frequency detecting threshold\n" " -F target frequency\n" " -p total number of periods to play/capture\n" +" -B buffer size in frames\n" +" -E period size in frames\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" @@ -324,6 +326,8 @@ static void set_defaults(struct bat *bat) bat->capture.device = NULL; bat->buf = NULL; bat->local = false; + bat->buffer_size = 0; + bat->period_size = 0; #ifdef HAVE_LIBTINYALSA bat->channels = 2; bat->playback.fct = &playback_tinyalsa; @@ -342,8 +346,8 @@ static void set_defaults(struct bat *bat)

static void parse_arguments(struct bat *bat, int argc, char *argv[]) { - int c, option_index; - static const char short_options[] = "D:P:C:f:n:F:c:r:s:k:p:lth"; + int c, option_index, err; + static const char short_options[] = "D:P:C:f:n:F:c:r:s:k:p:B:E:lth"; static const struct option long_options[] = { {"help", 0, 0, 'h'}, {"log", 1, 0, OPT_LOG}, @@ -414,6 +418,16 @@ static void parse_arguments(struct bat *bat, int argc, char *argv[]) bat->periods_total = atoi(optarg); bat->period_is_limited = true; break; + case 'B': + err = atoi(optarg); + bat->buffer_size = err >= MIN_BUFFERSIZE + && err < MAX_BUFFERSIZE ? err : 0; + break; + case 'E': + err = atoi(optarg); + bat->period_size = err >= MIN_PERIODSIZE + && err < MAX_PERIODSIZE ? err : 0; + break; case 'h': default: usage(bat); diff --git a/bat/common.h b/bat/common.h index b789af5..ad02a5a 100644 --- a/bat/common.h +++ b/bat/common.h @@ -46,6 +46,12 @@ #define DIV_BUFFERTIME 8 /* margin to avoid sign inversion when generate sine wav */ #define RANGE_FACTOR 0.95 +#define MAX_BUFFERSIZE 200000 +#define MIN_BUFFERSIZE 32 +#define MAX_PERIODSIZE 200000 +#define MIN_PERIODSIZE 32 +/* default period size for tinyalsa */ +#define TINYALSA_PERIODSIZE 1024

#define EBATBASE 1000 #define ENOPEAK (EBATBASE + 1) @@ -152,6 +158,8 @@ struct bat { int frame_size; /* size of frame */ int sample_size; /* size of sample */ enum _bat_pcm_format format; /* PCM format */ + int buffer_size; /* buffer size in frames */ + int period_size; /* period size in frames */

float sigma_k; /* threshold for peak detection */ float target_freq[MAX_CHANNELS]; diff --git a/bat/tinyalsa.c b/bat/tinyalsa.c index ea5f848..a19dd90 100644 --- a/bat/tinyalsa.c +++ b/bat/tinyalsa.c @@ -57,7 +57,10 @@ static int init_config(struct bat *bat, struct pcm_config *config) { config->channels = bat->channels; config->rate = bat->rate; - config->period_size = 1024; + if (bat->period_size > 0) + config->period_size = bat->period_size; + else + config->period_size = TINYALSA_PERIODSIZE; config->period_count = 4; config->start_threshold = 0; config->stop_threshold = 0;