mirror of
https://github.com/irmen/prog8.git
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113 lines
2.4 KiB
Plaintext
113 lines
2.4 KiB
Plaintext
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%import textio
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%import palette
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%import zsmkit_low
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;; Proof Of Concept ZSM player using a binary blob version of zsmkit by MooingLemur
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;; This version shows how you could integrate the zsmkit blob located in lower memory at $0830.
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;; It embeds the blob into the prg itself, no separate loading is necessary.
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;; It uses zsmkit's streaming ability to load the song data from disk on the fly.
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main $0830 {
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; this has to be the first statement to make sure it loads at the specified module address $0830
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%asmbinary "lib/zsmkit-0830.bin"
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const ubyte zsmkit_bank = 1
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bool loopchanged = false
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bool beat = false
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uword loop_number = 0
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sub start() {
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txt.print("zsmkit demo program (drive 8)!\n")
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txt.print("during playback, press return to pause/unpause\n")
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zsmkit.zsm_init_engine(zsmkit_bank)
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play_music()
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}
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asmsub callback_handler(ubyte prio @X, ubyte type @Y, ubyte arg @A) {
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%asm {{
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brk
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cpy #1
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beq _loop
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cpy #2
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beq _sync
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rts
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_loop:
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inc p8v_loopchanged
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rts
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_sync:
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inc p8v_beat
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rts
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}}
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}
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sub play_music() {
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uword next_free
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zsmkit.zsm_setfile(0, iso:"music/MUSIC.ZSM")
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cx16.rambank(2)
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txt.print(iso:"STARTING IN BANK 2, ADDRESS $A000")
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txt.nl()
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txt.print(iso:"NOW LOADING PCM FROM MUSIC.ZSM")
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txt.nl()
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next_free = zsmkit.zsm_loadpcm(0, $a000)
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txt.print(iso:"NOW AT BANK ")
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txt.print_ub(cx16.getrambank())
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txt.print(iso:", ADDRESS ")
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txt.print_uwhex(next_free, true)
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txt.nl()
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zsmkit.zsm_play(0)
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zsmkit.zsm_setcb(0, &callback_handler)
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bool paused = false
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uword oldjoy = $ffff
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ubyte intensity = 0
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repeat {
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uword newjoy
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newjoy, void = cx16.joystick_get(0)
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if (newjoy != oldjoy and (newjoy & $10) == 0) {
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if (paused) {
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zsmkit.zsm_play(0)
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paused = false
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} else {
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zsmkit.zsm_stop(0)
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paused = true
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}
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zsmkit.zsm_close(1)
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zsmkit.zsm_setfile(1, iso:"PAUSE.ZSM")
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zsmkit.zsm_play(1)
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}
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oldjoy = newjoy
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sys.waitvsync()
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zsmkit.zsm_tick(0)
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if (loopchanged) {
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txt.nl()
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loop_number += 1
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loopchanged = false
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txt.print(iso:"LOOP NUMBER: ")
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txt.print_uw(loop_number)
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txt.nl()
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zsmkit.zsm_setrate(0, 60+(loop_number << 2))
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}
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if (beat) {
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intensity = 16
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beat = false
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} else if (not paused) {
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txt.print(".")
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}
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if (intensity > 0) {
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intensity -= 1
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palette.set_color(0, (intensity >> 1) * $111)
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}
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zsmkit.zsm_fill_buffers()
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}
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}
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}
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