On most HDA Intel HDMI devices, the channel map list is approx. 500 ints in size, making the 256-sized buffer used by snd_pcm_query_chmaps_from_hw() too small and causing the query to fail (NULL result to caller, ENOMEM).
Bump the buffer size to 2048 ints.
Signed-off-by: Anssi Hannula anssi.hannula@iki.fi ---
Found while writing XBMC support.
I don't like just bumping the buffer size, so I hope you have some idea of a better solution? I guess one way would be just to retry with a dynamically allocated bigger buffer on ENOMEM, if there is nothing better...
src/pcm/pcm_hw.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/pcm/pcm_hw.c b/src/pcm/pcm_hw.c index 9ff83a9..ed83197 100644 --- a/src/pcm/pcm_hw.c +++ b/src/pcm/pcm_hw.c @@ -1051,7 +1051,7 @@ snd_pcm_query_chmaps_from_hw(int card, int dev, int subdev, { snd_ctl_t *ctl; snd_ctl_elem_id_t *id; - unsigned int tlv[256], *start; + unsigned int tlv[2048], *start; snd_pcm_chmap_query_t **map; int i, ret, nums;