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buffers: handle 0 result from Buffers param enumeration

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Since abf37dbdde the param enumeration in
the client-node can return 0 when the parameter is supported but there
are no params uploaded.

When negotiating buffers we need to assume a 0 result as a NULL filter
as well or else we will error.
This commit is contained in:
Wim Taymans 2026-03-25 11:10:50 +01:00
parent ea28343166
commit 7fe191bc10
1 changed files with 6 additions and 1 deletions
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7
src/pipewire/buffers.c
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@ -146,8 +146,11 @@ param_filter(struct pw_buffers *this,
if (in_res < 1) {
/* in_res == -ENOENT : unknown parameter, assume NULL and we will
* exit the loop below.
* in_res < 1 : some error or no data, exit now
* in_res == 0 : no data, assume NULL
* in_res < 0 : some error, exit now
*/
if (in_res == 0)
in_res = -ENOENT;
if (in_res == -ENOENT)
iparam = NULL;
else
@ -163,6 +166,8 @@ param_filter(struct pw_buffers *this,
id, &oidx, iparam, &oparam, result);
/* out_res < 1 : no value or error, exit now */
if (out_res == 0)
out_res = -ENOENT;
if (out_res < 1)
break;