- chan_render(buffer, length, &ym2612.CH[0], stereo|((pan&0x003)<<4)); // flags: stereo, lastchan, disabled, ?, pan_r, pan_l\r
- chan_render(buffer, length, &ym2612.CH[1], stereo|((pan&0x00c)<<2));\r
- chan_render(buffer, length, &ym2612.CH[2], stereo|((pan&0x030) ));\r
- chan_render(buffer, length, &ym2612.CH[3], stereo|((pan&0x0c0)>>2));\r
- chan_render(buffer, length, &ym2612.CH[4], stereo|((pan&0x300)>>4));\r
- chan_render(buffer, length, &ym2612.CH[5], stereo|((pan&0xc00)>>6)|(ym2612.dacen<<2)|2);\r
-\r
- return 1; // buffer updated\r
+ // flags: stereo, lastchan, disabled, ?, pan_r, pan_l\r
+ active_chs |= chan_render(buffer, length, &ym2612.CH[0], stereo|((pan&0x003)<<4)) << 0;\r
+ active_chs |= chan_render(buffer, length, &ym2612.CH[1], stereo|((pan&0x00c)<<2)) << 1;\r
+ active_chs |= chan_render(buffer, length, &ym2612.CH[2], stereo|((pan&0x030) )) << 2;\r
+ active_chs |= chan_render(buffer, length, &ym2612.CH[3], stereo|((pan&0x0c0)>>2)) << 3;\r
+ active_chs |= chan_render(buffer, length, &ym2612.CH[4], stereo|((pan&0x300)>>4)) << 4;\r
+ active_chs |= chan_render(buffer, length, &ym2612.CH[5], stereo|((pan&0xc00)>>6)|(ym2612.dacen<<2)|2) << 5;\r
+\r
+ return active_chs; // 1 if buffer updated\r