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G722: Fix buffer overflow #20

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G722: Fix buffer overflow #20

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2 changes: 1 addition & 1 deletion src/audiofilters/msg722.c
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Original file line number Diff line number Diff line change
Expand Up @@ -254,7 +254,7 @@ static void dec_process(MSFilter *f) {
/* introduce delay (TRANSITION_DELAY ms) */
generic_plc_update_continuity_buffer(s->plc_context, om->b_wptr, declen*sizeof(int16_t));

if (s->plc_context->plc_samples_used!=0) {
if (s->plc_context->plc_samples_used!=0 && declen >= 2*16*TRANSITION_DELAY) {
/* we were doing PLC, now resuming with normal audio, continuity buffer is twice the transition delay lengths,
* the second half is untouched by the update function and contains transition data generated by PLC */
generic_plc_transition_mix(((int16_t *)(om->b_wptr))+16*TRANSITION_DELAY, ((int16_t *)(s->plc_context->continuity_buffer))+16*TRANSITION_DELAY, 16*TRANSITION_DELAY);
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