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New hw_params implementation

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This commit is contained in:
Abramo Bagnara 2000-12-21 20:44:11 +00:00
parent 2f0a374adb
commit a3696de829
1 changed files with 63 additions and 39 deletions
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102
aplay/aplay.c
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@ -61,8 +61,11 @@ static ssize_t (*writen_func)(snd_pcm_t *handle, void **bufs, size_t size);
static char *command;
static snd_pcm_t *handle;
static snd_pcm_info_t info;
static snd_pcm_hw_params_t hwparams, rhwparams;
static snd_pcm_sw_params_t swparams;
static struct {
unsigned int format;
unsigned int channels;
unsigned int rate;
} hwparams, rhwparams;
static int timelimit = 0;
static int quiet_mode = 0;
static int file_type = FORMAT_DEFAULT;
@ -687,56 +690,77 @@ static int test_au(int fd, void *buffer)
static void set_params(void)
{
snd_pcm_hw_info_t info;
snd_pcm_strategy_t *strategy;
snd_pcm_hw_params_t params;
snd_pcm_sw_params_t swparams;
size_t bufsize;
int err;
snd_pcm_hw_info_any(&info);
if (mmap_flag)
info.access_mask = SND_PCM_ACCBIT_MMAP;
else if (interleaved)
info.access_mask = SND_PCM_ACCBIT_RW_INTERLEAVED;
err = snd_pcm_hw_params_any(handle, &params);
if (err < 0) {
error("Broken configuration for this PCM: no configurations available");
exit(EXIT_FAILURE);
}
if (mmap_flag) {
mask_t *mask = alloca(mask_sizeof());
mask_set(mask, SND_PCM_ACCESS_MMAP_INTERLEAVED);
mask_set(mask, SND_PCM_ACCESS_MMAP_NONINTERLEAVED);
mask_set(mask, SND_PCM_ACCESS_MMAP_COMPLEX);
err = snd_pcm_hw_params_mask(handle, &params,
SND_PCM_HW_PARAM_ACCESS, mask);
} else if (interleaved)
err = snd_pcm_hw_params_set(handle, &params,
SND_PCM_HW_PARAM_ACCESS,
SND_PCM_ACCESS_RW_INTERLEAVED);
else
info.access_mask = SND_PCM_ACCBIT_RW_NONINTERLEAVED;
info.format_mask = 1 << hwparams.format;
info.channels_min = info.channels_max = hwparams.channels;
info.fragments_min = 2;
err = snd_pcm_strategy_simple(&strategy, 1000000, 2000000);
assert(err >= 0);
err = snd_pcm_strategy_simple_near(strategy, 0, SND_PCM_HW_INFO_RATE,
hwparams.rate, 1);
assert(err >= 0);
err = snd_pcm_strategy_simple_near(strategy, 1, SND_PCM_HW_INFO_FRAGMENT_LENGTH,
frag_length, 1);
assert(err >= 0);
err = snd_pcm_strategy_simple_near(strategy, 2, SND_PCM_HW_INFO_BUFFER_LENGTH,
buffer_length, 1);
assert(err >= 0);
err = snd_pcm_hw_info_strategy(handle, &info, strategy);
snd_pcm_strategy_free(strategy);
err = snd_pcm_hw_params_set(handle, &params,
SND_PCM_HW_PARAM_ACCESS,
SND_PCM_ACCESS_RW_NONINTERLEAVED);
if (err < 0) {
fprintf(stderr, "Unable to find params combination:\n");
err = snd_pcm_hw_info_try_explain_failure(handle, &info, NULL, 2, stderr);
if (err < 0) {
fprintf(stderr, "No explaination found for this failure\n");
}
error("Access type not available");
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_info(handle, &hwparams, &info);
err = snd_pcm_hw_params_set(handle, &params, SND_PCM_HW_PARAM_FORMAT,
hwparams.format);
if (err < 0) {
snd_pcm_dump_hw_params_fail(&hwparams, stderr);
error("unable to set hw params");
error("Sample format non available");
exit(EXIT_FAILURE);
}
bufsize = hwparams.fragment_size * hwparams.fragments;
err = snd_pcm_hw_params_set(handle, &params, SND_PCM_HW_PARAM_CHANNELS,
hwparams.channels);
if (err < 0) {
error("Channels count non available");
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_min(handle, &params,
SND_PCM_HW_PARAM_FRAGMENTS, 2);
assert(err >= 0);
err = snd_pcm_hw_params_near(handle, &params,
SND_PCM_HW_PARAM_RATE, hwparams.rate);
assert(err >= 0);
err = snd_pcm_hw_params_near(handle, &params,
SND_PCM_HW_PARAM_FRAGMENT_LENGTH,
frag_length);
assert(err >= 0);
err = snd_pcm_hw_params_near(handle, &params,
SND_PCM_HW_PARAM_BUFFER_LENGTH,
buffer_length);
assert(err >= 0);
err = snd_pcm_hw_params(handle, &params);
if (err < 0) {
fprintf(stderr, "Unable to install params:\n");
snd_pcm_dump_hw_params(&params, stderr);
exit(EXIT_FAILURE);
}
bufsize = snd_pcm_hw_params_value(&params, SND_PCM_HW_PARAM_FRAGMENT_SIZE) *
snd_pcm_hw_params_value(&params, SND_PCM_HW_PARAM_FRAGMENTS);
swparams.start_mode = SND_PCM_START_DATA;
swparams.ready_mode = ready_mode;
swparams.xrun_mode = xrun_mode;
swparams.avail_min = hwparams.rate * avail_min / 1000000;
swparams.xfer_min = hwparams.rate * xfer_min / 1000000;
swparams.avail_min = snd_pcm_hw_params_value(&params, SND_PCM_HW_PARAM_RATE) * avail_min / 1000000;
swparams.xfer_min = snd_pcm_hw_params_value(&params, SND_PCM_HW_PARAM_RATE) * xfer_min / 1000000;
if (xrun_mode == SND_PCM_XRUN_FRAGMENT)
swparams.xfer_align = hwparams.fragment_size;
swparams.xfer_align = snd_pcm_hw_params_value(&params, SND_PCM_HW_PARAM_FRAGMENT_SIZE);
else
swparams.xfer_align = 1;
swparams.xfer_min -= swparams.xfer_min % swparams.xfer_align;
@ -763,7 +787,7 @@ static void set_params(void)
if (verbose)
snd_pcm_dump(handle, stderr);
buffer_size = hwparams.fragment_size;
buffer_size = snd_pcm_hw_params_value(&params, SND_PCM_HW_PARAM_FRAGMENT_SIZE);
bits_per_sample = snd_pcm_format_physical_width(hwparams.format);
bits_per_frame = bits_per_sample * hwparams.channels;
buffer_bytes = buffer_size * bits_per_frame / 8;