diff options
| -rw-r--r-- | spudec.c | 22 |
1 files changed, 17 insertions, 5 deletions
@@ -354,7 +354,7 @@ static void compute_palette(spudec_handle_t *this, packet_t *packet) static void spudec_process_control(spudec_handle_t *this, int pts100) { - int a,b; /* Temporary vars */ + int a,b,c,d; /* Temporary vars */ unsigned int date, type; unsigned int off; unsigned int start_off = 0; @@ -417,10 +417,22 @@ static void spudec_process_control(spudec_handle_t *this, int pts100) break; case 0x04: /* Alpha */ - this->alpha[0] = this->packet[off] >> 4; - this->alpha[1] = this->packet[off] & 0xf; - this->alpha[2] = this->packet[off + 1] >> 4; - this->alpha[3] = this->packet[off + 1] & 0xf; + a = this->packet[off] >> 4; + b = this->packet[off] & 0xf; + c = this->packet[off + 1] >> 4; + d = this->packet[off + 1] & 0xf; + // Note: some DVDs change these values to create a fade-in/fade-out effect + // We can not handle this, so just keep the highest value during the display time. + if (display) { + a = FFMAX(a, this->alpha[0]); + b = FFMAX(b, this->alpha[1]); + c = FFMAX(c, this->alpha[2]); + d = FFMAX(d, this->alpha[3]); + } + this->alpha[0] = a; + this->alpha[1] = b; + this->alpha[2] = c; + this->alpha[3] = d; mp_msg(MSGT_SPUDEC,MSGL_DBG2,"Alpha %d, %d, %d, %d\n", this->alpha[0], this->alpha[1], this->alpha[2], this->alpha[3]); off+=2; |