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trs80: validate the cas file

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Robbbert 2021-04-02 16:25:34 +11:00
parent 68b16c6f51
commit 3a0e9abc43
1 changed files with 8 additions and 0 deletions
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8
src/lib/formats/trs_cas.cpp
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@ -43,6 +43,14 @@ static int trs80l2_handle_cas(int16_t *buffer, const uint8_t *casdata)
int data_pos = 0, sample_count = 0;
bool sw = false;
// Make sure this is a trs80 tape
// Should have some zero bytes then one 0xA5
while ((cas_size > data_pos) && (casdata[data_pos] == 0x00))
data_pos++;
if (casdata[data_pos] != 0xA5)
return 0;
data_pos = 0;
while( data_pos < cas_size )
{
uint8_t data = casdata[data_pos];