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-rw-r--r--instance.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/instance.c b/instance.c
index 2859493..36fb2d0 100644
--- a/instance.c
+++ b/instance.c
@@ -59,7 +59,8 @@ static void oldpins_array_seed(struct srd_decoder_inst *di)
count = di->dec_num_channels;
arr = g_array_sized_new(FALSE, TRUE, sizeof(uint8_t), count);
g_array_set_size(arr, count);
- memset(arr->data, SRD_INITIAL_PIN_SAME_AS_SAMPLE0, count);
+ if (arr->data)
+ memset(arr->data, SRD_INITIAL_PIN_SAME_AS_SAMPLE0, count);
di->old_pins_array = arr;
}
@@ -831,6 +832,8 @@ static void update_old_pins_array(struct srd_decoder_inst *di,
oldpins_array_seed(di);
for (i = 0; i < di->dec_num_channels; i++) {
+ if (di->dec_channelmap[i] == -1)
+ continue; /* Ignore unused optional channels. */
byte_offset = di->dec_channelmap[i] / 8;
bit_offset = di->dec_channelmap[i] % 8;
sample = *(sample_pos + byte_offset) & (1 << bit_offset) ? 1 : 0;
@@ -853,6 +856,8 @@ static void update_old_pins_array_initial_pins(struct srd_decoder_inst *di)
for (i = 0; i < di->dec_num_channels; i++) {
if (di->old_pins_array->data[i] != SRD_INITIAL_PIN_SAME_AS_SAMPLE0)
continue;
+ if (di->dec_channelmap[i] == -1)
+ continue; /* Ignore unused optional channels. */
byte_offset = di->dec_channelmap[i] / 8;
bit_offset = di->dec_channelmap[i] % 8;
sample = *(sample_pos + byte_offset) & (1 << bit_offset) ? 1 : 0;