mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-10-29 05:40:25 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

Cache the chmap operation errors

Browse source 
... not to retry the same error again.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2012-07-30 18:21:43 +02:00
parent 3fc13d6f5b
commit 34f6545520
1 changed files with 54 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

66
src/pcm/pcm_hw.c
View file

@ -105,6 +105,8 @@ typedef struct {
snd_pcm_format_t format;
int rate;
int channels;
/* for chmap */
unsigned int chmap_caps;
} snd_pcm_hw_t;
#define SNDRV_FILE_PCM_STREAM_PLAYBACK ALSA_DEVICE_DIRECTORY "pcmC%iD%ip"
@ -1022,6 +1024,27 @@ static int is_chmap_type(int type)
type <= SND_CTL_TLVT_CHMAP_PAIRED);
}
enum { CHMAP_CTL_QUERY, CHMAP_CTL_GET, CHMAP_CTL_SET };
static int chmap_caps(snd_pcm_hw_t *hw, int type)
{
if (hw->chmap_caps & (1 << type))
return 1;
if (hw->chmap_caps & (1 << (type + 8)))
return 0;
return 1;
}
static void chmap_caps_set_ok(snd_pcm_hw_t *hw, int type)
{
hw->chmap_caps |= (1 << type);
}
static void chmap_caps_set_error(snd_pcm_hw_t *hw, int type)
{
hw->chmap_caps |= (1 << (type + 8));
}
static int **snd_pcm_hw_query_chmaps(snd_pcm_t *pcm)
{
snd_pcm_hw_t *hw = pcm->private_data;
@ -1031,10 +1054,13 @@ static int **snd_pcm_hw_query_chmaps(snd_pcm_t *pcm)
int **map;
int i, ret, nums;
if (!chmap_caps(hw, CHMAP_CTL_QUERY))
return NULL;
ret = snd_ctl_hw_open(&ctl, NULL, hw->card, 0);
if (ret < 0) {
SYSMSG("Cannot open the associated CTL\n");
return NULL;
goto error;
}
snd_ctl_elem_id_alloca(&id);
@ -1043,7 +1069,7 @@ static int **snd_pcm_hw_query_chmaps(snd_pcm_t *pcm)
snd_ctl_close(ctl);
if (ret < 0) {
SYSMSG("Cannot read Channel Map TLV\n");
return NULL;
goto error;
}
#if 0
@ -1053,7 +1079,7 @@ static int **snd_pcm_hw_query_chmaps(snd_pcm_t *pcm)
if (tlv[0] != SND_CTL_TLVT_CONTAINER) {
if (!is_chmap_type(tlv[0])) {
SYSMSG("Invalid TLV type %d\n", tlv[0]);
return NULL;
goto error;
}
start = tlv;
nums = 1;
@ -1066,7 +1092,7 @@ static int **snd_pcm_hw_query_chmaps(snd_pcm_t *pcm)
for (p = start; size > 0; ) {
if (!is_chmap_type(p[0])) {
SYSMSG("Invalid TLV type %d\n", p[0]);
return NULL;
goto error;
}
nums++;
size -= p[1] + 8;
@ -1078,19 +1104,20 @@ static int **snd_pcm_hw_query_chmaps(snd_pcm_t *pcm)
return NULL;
for (i = 0; i < nums; i++) {
map[i] = malloc(start[1] + 8);
if (!map[i])
goto nomem;
if (!map[i]) {
snd_pcm_free_chmaps(map);
return NULL;
}
map[i][0] = start[0] - 0x100;
map[i][1] = start[1] / 4;
memcpy(map[i] + 2, start + 2, start[1]);
start += start[1] / 4 + 2;
}
chmap_caps_set_ok(hw, CHMAP_CTL_QUERY);
return map;
nomem:
for (; i >= 0; i--)
free(map[i]);
free(map);
error:
chmap_caps_set_error(hw, CHMAP_CTL_QUERY);
return NULL;
}
@ -1104,6 +1131,9 @@ static int *snd_pcm_hw_get_chmap(snd_pcm_t *pcm)
unsigned int i;
int ret;
if (!chmap_caps(hw, CHMAP_CTL_GET))
return NULL;
switch (FAST_PCM_STATE(hw)) {
case SNDRV_PCM_STATE_PREPARED:
case SNDRV_PCM_STATE_RUNNING:
@ -1125,6 +1155,7 @@ static int *snd_pcm_hw_get_chmap(snd_pcm_t *pcm)
if (ret < 0) {
free(map);
SYSMSG("Cannot open the associated CTL\n");
chmap_caps_set_error(hw, CHMAP_CTL_GET);
return NULL;
}
snd_ctl_elem_value_alloca(&val);
@ -1132,15 +1163,16 @@ static int *snd_pcm_hw_get_chmap(snd_pcm_t *pcm)
fill_chmap_ctl_id(pcm, id);
snd_ctl_elem_value_set_id(val, id);
ret = snd_ctl_elem_read(ctl, val);
snd_ctl_close(ctl);
if (ret < 0) {
snd_ctl_close(ctl);
free(map);
SYSMSG("Cannot read Channel Map ctl\n");
chmap_caps_set_error(hw, CHMAP_CTL_GET);
return NULL;
}
for (i = 0; i < pcm->channels; i++)
map[i + 1] = snd_ctl_elem_value_get_integer(val, i);
snd_ctl_close(ctl);
chmap_caps_set_ok(hw, CHMAP_CTL_GET);
return map;
}
@ -1152,6 +1184,9 @@ static int snd_pcm_hw_set_chmap(snd_pcm_t *pcm, const int *map)
snd_ctl_elem_value_t *val;
int i, ret;
if (!chmap_caps(hw, CHMAP_CTL_SET))
return -ENXIO;
if (*map < 0 || *map > 128) {
SYSMSG("Invalid number of channels %d\n", *map);
return -EINVAL;
@ -1164,6 +1199,7 @@ static int snd_pcm_hw_set_chmap(snd_pcm_t *pcm, const int *map)
ret = snd_ctl_hw_open(&ctl, NULL, hw->card, 0);
if (ret < 0) {
SYSMSG("Cannot open the associated CTL\n");
chmap_caps_set_error(hw, CHMAP_CTL_SET);
return ret;
}
snd_ctl_elem_id_alloca(&id);
@ -1174,6 +1210,12 @@ static int snd_pcm_hw_set_chmap(snd_pcm_t *pcm, const int *map)
snd_ctl_elem_value_set_integer(val, i, map[i + 1]);
ret = snd_ctl_elem_write(ctl, val);
snd_ctl_close(ctl);
if (ret >= 0)
chmap_caps_set_ok(hw, CHMAP_CTL_SET);
else if (ret == -ENOENT || ret == -EPERM || ret == -ENXIO) {
chmap_caps_set_error(hw, CHMAP_CTL_SET);
ret = -ENXIO;
}
if (ret < 0)
SYSMSG("Cannot write Channel Map ctl\n");
return ret;