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alsa: use the safer pod parser for control events

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This commit is contained in:
Wim Taymans 2025-07-30 18:43:34 +02:00
parent abcf70538d
commit 7f7b4be82d
1 changed files with 15 additions and 10 deletions
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25
spa/plugins/alsa/alsa-seq.c
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@ -813,9 +813,13 @@ static int process_write(struct seq_state *state)
spa_list_for_each(port, &stream->mix_list, mix_link) {
struct spa_io_buffers *io = port->io;
struct buffer *buffer;
struct spa_pod_sequence *pod;
struct spa_pod_parser parser;
struct spa_pod_frame frame;
struct spa_pod_sequence seq;
const void *seq_body;
struct spa_data *d;
struct spa_pod_control *c;
struct spa_pod_control c;
const void *c_body;
uint64_t out_time;
snd_seq_real_time_t out_rt;
bool first = true;
@ -831,24 +835,25 @@ static int process_write(struct seq_state *state)
spa_node_call_reuse_buffer(&state->callbacks, port->id, io->buffer_id);
res |= SPA_STATUS_NEED_DATA;
pod = spa_pod_from_data(d->data, d->maxsize, d->chunk->offset, d->chunk->size);
if (pod == NULL) {
spa_pod_parser_init_from_data(&parser, d->data, d->maxsize,
d->chunk->offset, d->chunk->size);
if (spa_pod_parser_push_sequence_body(&parser, &frame, &seq, &seq_body) < 0) {
spa_log_warn(state->log, "invalid sequence in buffer max:%u offset:%u size:%u",
d->maxsize, d->chunk->offset, d->chunk->size);
continue;
}
SPA_POD_SEQUENCE_FOREACH(pod, c) {
while (spa_pod_parser_get_control_body(&parser, &c, &c_body) >= 0) {
size_t body_size;
uint8_t *body;
if (c->type != SPA_CONTROL_UMP)
if (c.type != SPA_CONTROL_UMP)
continue;
body = SPA_POD_BODY(&c->value);
body_size = SPA_POD_BODY_SIZE(&c->value);
body = (uint8_t*)c_body;
body_size = c.value.size;
out_time = state->queue_time + NSEC_FROM_CLOCK(&state->rate, c->offset);
out_time = state->queue_time + NSEC_FROM_CLOCK(&state->rate, c.offset);
out_rt.tv_nsec = out_time % SPA_NSEC_PER_SEC;
out_rt.tv_sec = out_time / SPA_NSEC_PER_SEC;