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Runtime hw_info constraints support. New hw_info with lengths

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This commit is contained in:
Abramo Bagnara 2000-12-07 15:58:03 +00:00
parent b6134d77c1
commit 714ac32b5e
7 changed files with 190 additions and 271 deletions
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74
src/pcm/pcm_plug.c
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@ -154,8 +154,6 @@ static int snd_pcm_plug_hw_info(snd_pcm_t *pcm, snd_pcm_hw_info_t *info)
snd_pcm_t *slave = plug->req_slave;
snd_pcm_hw_info_t sinfo;
int err;
size_t size;
unsigned int n;
info->access_mask &= (SND_PCM_ACCBIT_MMAP_INTERLEAVED |
SND_PCM_ACCBIT_RW_INTERLEAVED |
@ -193,74 +191,16 @@ static int snd_pcm_plug_hw_info(snd_pcm_t *pcm, snd_pcm_hw_info_t *info)
sinfo.channels_max = UINT_MAX;
sinfo.rate_min = RATE_MIN;
sinfo.rate_max = RATE_MAX;
sinfo.fragment_size_min = muldiv_down(info->fragment_size_min, sinfo.rate_min, info->rate_max);
sinfo.fragment_size_max = muldiv_up(info->fragment_size_max, sinfo.rate_max, info->rate_min);
sinfo.buffer_size_min = muldiv_down(info->buffer_size_min, sinfo.rate_min, info->rate_max);
sinfo.buffer_size_max = muldiv_up(info->buffer_size_max, sinfo.rate_max, info->rate_min);
/* FIXME: tricky here. This is not the right way to cope with this */
if (info->rate_min == info->rate_max) {
snd_pcm_hw_info_t i1 = sinfo;
snd_pcm_hw_info_t i2 = sinfo;
int err1, err2;
unsigned int rate = info->rate_min;
i1.rate_max = rate;
err1 = snd_pcm_hw_info(slave, &i1);
if (err1 < 0 || rate - i1.rate_max > 1) {
i2.rate_min = rate + 1;
err2 = snd_pcm_hw_info(slave, &i2);
} else
err2 = -EINVAL;
if (err1 < 0) {
sinfo = i2;
if (err2 >= 0)
sinfo.rate_max = sinfo.rate_min;
err = err2;
} else {
if (err2 < 0 ||
rate - i1.rate_max <= i2.rate_min - rate) {
sinfo = i1;
sinfo.rate_min = sinfo.rate_max;
err = err1;
} else {
sinfo = i2;
sinfo.rate_max = sinfo.rate_min;
err = err2;
}
}
} else
err = snd_pcm_hw_info(slave, &sinfo);
err = snd_pcm_hw_info(slave, &sinfo);
info->subformat_mask = sinfo.subformat_mask;
info->fragment_length_min = sinfo.fragment_length_min;
info->fragment_length_max = sinfo.fragment_length_max;
info->fragments_min = sinfo.fragments_min;
info->fragments_max = sinfo.fragments_max;
info->buffer_length_min = sinfo.buffer_length_min;
info->buffer_length_max = sinfo.buffer_length_max;
size = muldiv_down(sinfo.fragment_size_min, info->rate_min, sinfo.rate_max);
if (info->fragment_size_min < size)
info->fragment_size_min = size;
size = muldiv_up(sinfo.fragment_size_max, info->rate_max, sinfo.rate_min);
if (info->fragment_size_max > size)
info->fragment_size_max = size;
if (info->fragment_size_min > info->fragment_size_max)
return -EINVAL;
size = muldiv_down(sinfo.buffer_size_min, info->rate_min, sinfo.rate_max);
if (info->buffer_size_min < size)
info->buffer_size_min = size;
size = muldiv_up(sinfo.buffer_size_max, info->rate_max, sinfo.rate_min);
if (info->buffer_size_max > size)
info->buffer_size_max = size;
if (info->buffer_size_min > info->buffer_size_max)
return -EINVAL;
n = info->buffer_size_min / info->fragment_size_max;
if (info->fragments_min < n)
info->fragments_min = n;
n = info->buffer_size_max / info->fragment_size_min;
if (info->fragments_max > n)
info->fragments_max = n;
if (info->fragments_min > info->fragments_max)
return -EINVAL;
if (err < 0)
return err;
info->info = sinfo.info & ~(SND_PCM_INFO_MMAP | SND_PCM_INFO_MMAP_VALID);
@ -484,10 +424,6 @@ static int snd_pcm_plug_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
sinfo.rate_max = RATE_MAX;
sinfo.fragments_min = params->fragments;
sinfo.fragments_max = params->fragments;
sinfo.fragment_size_min = 1;
sinfo.fragment_size_max = ULONG_MAX;
sinfo.buffer_size_min = 1;
sinfo.buffer_size_max = ULONG_MAX;
err = snd_pcm_strategy_simple(&strategy, 1000000, 2000000);
if (err < 0)
return err;