guix - Wojtek's customized Guix

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Diffstat (limited to 'gnu/packages/robotics.scm')

0 files changed, 0 insertions, 0 deletions

icient, bool *ok=NULL) { int linearSample = (state.sample1 * coefficient[0] + state.sample2 * coefficient[1]) >> 8; + int delta; linearSample += ((code & 0x08) ? (code - 0x10) : code) * state.delta; linearSample = clamp(linearSample, MIN_INT16, MAX_INT16); - int delta = (state.delta * adaptationTable[code]) >> 8; + if (multiplyCheckOverflow(state.delta, adaptationTable[code], &delta)) + { + if (ok) *ok=false; + _af_error(AF_BAD_COMPRESSION, "Error decoding sample"); + return 0; + } + delta >>= 8; if (delta < 16) delta = 16; state.delta = delta; state.sample2 = state.sample1; state.sample1 = linearSample; + if (ok) *ok=true; return static_cast<int16_t>(linearSample); } @@ -212,13 +248,16 @@ int MSADPCM::decodeBlock(const uint8_t *encoded, int16_t *decoded) { uint8_t code; int16_t newSample; + bool ok; code = *encoded >> 4; - newSample = decodeSample(*state[0], code, coefficient[0]); + newSample = decodeSample(*state[0], code, coefficient[0], &ok); + if (!ok) return 0; *decoded++ = newSample; code = *encoded & 0x0f; - newSample = decodeSample(*state[1], code, coefficient[1]); + newSample = decodeSample(*state[1], code, coefficient[1], &ok); + if (!ok) return 0; *decoded++ = newSample; encoded++;


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