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Fixed file plugin - mmap access was broken and revents were not handled correctly

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This commit is contained in:
Jaroslav Kysela 2004-02-08 10:19:52 +00:00
parent 37728639ae
commit 131d6610fc
5 changed files with 50 additions and 19 deletions
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53
src/pcm/pcm_file.c
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@ -138,6 +138,12 @@ static int snd_pcm_file_async(snd_pcm_t *pcm, int sig, pid_t pid)
return snd_pcm_async(file->slave, sig, pid);
}
static int snd_pcm_file_poll_revents(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
{
snd_pcm_file_t *file = pcm->private_data;
return snd_pcm_poll_descriptors_revents(file->slave, pfds, nfds, revents);
}
static int snd_pcm_file_info(snd_pcm_t *pcm, snd_pcm_info_t * info)
{
snd_pcm_file_t *file = pcm->private_data;
@ -345,6 +351,19 @@ static int snd_pcm_file_hw_refine(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
return snd_pcm_hw_refine(file->slave, params);
}
static int snd_pcm_file_hw_free(snd_pcm_t *pcm)
{
snd_pcm_file_t *file = pcm->private_data;
if (file->wbuf) {
free(file->wbuf);
if (file->wbuf_areas)
free(file->wbuf_areas);
file->wbuf = 0;
file->wbuf_areas = 0;
}
return snd_pcm_hw_free(file->slave);
}
static int snd_pcm_file_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t * params)
{
snd_pcm_file_t *file = pcm->private_data;
@ -358,7 +377,15 @@ static int snd_pcm_file_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t * params)
file->wbuf_size_bytes = snd_pcm_frames_to_bytes(slave, file->wbuf_size);
assert(!file->wbuf);
file->wbuf = malloc(file->wbuf_size_bytes);
if (file->wbuf == NULL) {
snd_pcm_file_hw_free(pcm);
return -ENOMEM;
}
file->wbuf_areas = malloc(sizeof(*file->wbuf_areas) * slave->channels);
if (file->wbuf_areas == NULL) {
snd_pcm_file_hw_free(pcm);
return -ENOMEM;
}
file->appl_ptr = file->file_ptr_bytes = 0;
for (channel = 0; channel < slave->channels; ++channel) {
snd_pcm_channel_area_t *a = &file->wbuf_areas[channel];
@ -369,18 +396,6 @@ static int snd_pcm_file_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t * params)
return 0;
}
static int snd_pcm_file_hw_free(snd_pcm_t *pcm)
{
snd_pcm_file_t *file = pcm->private_data;
if (file->wbuf) {
free(file->wbuf);
free(file->wbuf_areas);
file->wbuf = 0;
file->wbuf_areas = 0;
}
return snd_pcm_hw_free(file->slave);
}
static int snd_pcm_file_sw_params(snd_pcm_t *pcm, snd_pcm_sw_params_t * params)
{
snd_pcm_file_t *file = pcm->private_data;
@ -389,11 +404,23 @@ static int snd_pcm_file_sw_params(snd_pcm_t *pcm, snd_pcm_sw_params_t * params)
static int snd_pcm_file_mmap(snd_pcm_t *pcm ATTRIBUTE_UNUSED)
{
snd_pcm_file_t *file = pcm->private_data;
snd_pcm_t *slave = file->slave;
pcm->running_areas = slave->running_areas;
pcm->stopped_areas = slave->stopped_areas;
pcm->mmap_channels = slave->mmap_channels;
pcm->mmap_shadow = 1;
return 0;
}
static int snd_pcm_file_munmap(snd_pcm_t *pcm ATTRIBUTE_UNUSED)
{
snd_pcm_file_t *file = pcm->private_data;
snd_pcm_t *slave = file->slave;
pcm->mmap_channels = NULL;
pcm->running_areas = NULL;
pcm->stopped_areas = NULL;
pcm->mmap_shadow = 0;
return 0;
}
@ -423,6 +450,7 @@ static snd_pcm_ops_t snd_pcm_file_ops = {
.dump = snd_pcm_file_dump,
.nonblock = snd_pcm_file_nonblock,
.async = snd_pcm_file_async,
.poll_revents = snd_pcm_file_poll_revents,
.mmap = snd_pcm_file_mmap,
.munmap = snd_pcm_file_munmap,
};
@ -512,6 +540,7 @@ int snd_pcm_file_open(snd_pcm_t **pcmp, const char *name,
pcm->private_data = file;
pcm->poll_fd = slave->poll_fd;
pcm->poll_events = slave->poll_events;
pcm->mmap_shadow = 1;
snd_pcm_link_hw_ptr(pcm, slave);
snd_pcm_link_appl_ptr(pcm, slave);
*pcmp = pcm;