148 lines
3.6 KiB
C++
148 lines
3.6 KiB
C++
#pragma once
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#include "playback_backend.hpp"
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#include <omp.h>
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#include "x16emu/ymglue.h"
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#include <cstdint>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <streambuf>
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#include <vector>
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#include <util.hpp>
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#include <SDL.h>
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extern "C" {
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#include "x16emu/audio.h"
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#include "x16emu/vera_pcm.h"
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#include "x16emu/vera_psg.h"
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#include "x16emu/ymglue.h"
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}
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#include "file_backend.hpp"
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#define YM_FREQ (3579545/64)
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#define PSG_FREQ (AUDIO_SAMPLERATE)
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enum ZsmCommandId {
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PsgWrite,
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ExtCmd,
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FmWrite,
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ZsmEOF,
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Delay
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};
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struct reg_pair {
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uint8_t reg;
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uint8_t val;
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};
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struct ZsmCommand {
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ZsmCommandId id;
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union {
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struct {
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uint8_t reg;
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uint8_t val;
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} psg_write;
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struct {
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uint8_t channel;
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uint8_t bytes;
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union {
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uint8_t *pcm;
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struct {
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uint8_t chip_id;
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uint8_t writes;
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uint8_t *write_bytes;
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} expansion;
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uint8_t *sync;
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uint8_t *custom;
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};
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} extcmd;
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struct {
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uint8_t len;
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reg_pair *regs;
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} fm_write;
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uint8_t delay;
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};
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~ZsmCommand();
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};
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struct pcm_instrument {
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uint8_t geom;
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uint32_t loop_rem;
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uint32_t loop;
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bool islooped;
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uint32_t remain;
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uint8_t *data = nullptr;
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inline ~pcm_instrument() {
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if (data != nullptr) free((void*)data);
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}
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};
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class ZsmBackend : public PlaybackBackend {
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File *file;
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Fifo<int16_t> audio_buf;
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DynPtr psg_buf;
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DynPtr pcm_buf;
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DynPtr out_buf;
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DynPtr ym_buf;
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DynPtr ym_resample_buf;
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bool ym_recorded = false;
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uint8_t ym_data[256];
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uint32_t loop_rem;
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uint32_t pcm_data_offs;
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uint8_t pcm_data_instruments;
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uint32_t loop;
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bool islooped;
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uint32_t remain;
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uint32_t cur;
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uint32_t pcm_loop_point;
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uint32_t rem_point;
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SDL_AudioStream *fm_stream;
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std::vector<pcm_instrument*> instruments;
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uint8_t *audio_sample = nullptr;
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bool pcm_enable();
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bool psg_enable();
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bool fm_enable();
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double pcm_volume();
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double psg_volume();
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double fm_volume();
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void audio_step(size_t samples);
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inline void *reserve(size_t len) {
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return (void*)audio_buf.reserve(len);
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}
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inline size_t copy_out(void *buf, size_t len) {
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return audio_buf.pop((int16_t*)buf, len);
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}
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uint32_t loop_point;
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double loop_pos = 0.0;
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uint32_t pcm_offset;
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uint8_t fm_mask;
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uint16_t psg_channel_mask;
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uint16_t tick_rate;
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size_t music_data_start;
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size_t music_data_len;
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double ticks;
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ssize_t delayTicks = 0;
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double position;
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double cpuClocks = 0;
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inline double get_delay_per_frame() {
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return 1.0;
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}
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void tick(bool step = true);\
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void seek_internal(double position, bool loop = true);
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ZsmCommand get_command();
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public:
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uint64_t get_min_samples() override;
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std::optional<uint64_t> get_max_samples() override;
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inline std::string get_id() override {
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return "zsm";
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}
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inline std::string get_name() override {
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return "ZSM player";
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}
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std::vector<Property> get_property_list() override;
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void seek(double position) override;
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void load(const char *filename) override;
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void switch_stream(int idx) override;
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void cleanup() override;
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int get_stream_idx() override;
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size_t render(void *buf, size_t maxlen) override;
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double get_position() override;
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inline double get_length() override {
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return length;
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}
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inline ~ZsmBackend() override { }
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};
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