#include "audio_dec_midi_ctrl.h" #if AUDIO_MIDI_CTRL_CONFIG /* *如遇到多按琴键同时按下或重复快速按某琴键出现卡顿的情况 *处理方法：1、减少同时发声MIDI_KEY_NUM 个数 * 2、提高外挂flash的 波特率（60M、90M）,调整spi读线宽的为2线模式或4线 * 3、提高系统时钟 * */ extern struct audio_dac_hdl dac_hdl; #define MIDI_KEY_NUM (18)//(支持多少个key同时发声(1~18)， 越大，需要的时钟越大) const u16 midi_samplerate_tab[9] = { 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000 }; struct _midi_obj { u8 channel; u32 sample_rate; u32 id; // 唯一标识符，随机值 u32 start : 1; // 正在解码 char *path; //音色文件路径 struct audio_res_wait wait; // 资源等待句柄 struct midi_ctrl_decoder midi_ctrl_dec; struct audio_mixer_ch mix_ch; // 叠加句柄 struct audio_stream *stream; // 音频流 }; struct _midi_obj *midi_ctrl_dec_hdl = NULL; void midi_ctrl_ioctrl(u32 cmd, void *priv); /*----------------------------------------------------------------------------*/ /**@brief midi ctrl解码释放 @param @return @note */ /*----------------------------------------------------------------------------*/ void midi_ctrl_dec_relaese() { if (midi_ctrl_dec_hdl) { audio_decoder_task_del_wait(&decode_task, &midi_ctrl_dec_hdl->wait); clock_remove(DEC_MIDI_CLK); local_irq_disable(); free(midi_ctrl_dec_hdl); midi_ctrl_dec_hdl = NULL; local_irq_enable(); } } /*----------------------------------------------------------------------------*/ /**@brief midi音色文件获取 @param @return @note 内部调用 */ /*----------------------------------------------------------------------------*/ static int midi_get_cfg_addr(u8 **addr) { if (!midi_ctrl_dec_hdl) { return -1; } #ifndef CONFIG_MIDI_DEC_ADDR //音色文件支持在外部存储卡或者外挂flash,sdk默认使用本方式 /* FILE *file = fopen("storage/sd0/C/MIDI.bin\0", "r"); */ FILE *file = fopen(midi_ctrl_dec_hdl->path, "r"); /* FILE *file = fopen(SDFILE_RES_ROOT_PATH"MIDI.bin\0", "r"); */ if (!file) { log_e("MIDI.bin open err\n"); return -1; } *addr = (u8 *)file; log_i("midi_file %x\n", file); #else //音色文件仅支持在内置flash /* FILE *file = fopen(SDFILE_RES_ROOT_PATH"MIDI.bin\0", "r"); */ FILE *file = fopen(midi_ctrl_dec_hdl->path, "r"); if (!file) { log_e("MIDI.bin open err\n"); return -1; } struct vfs_attr attr = {0}; fget_attrs(file, &attr); *addr = (u8 *)attr.sclust; fclose(file); #endif return 0; } /*----------------------------------------------------------------------------*/ /**@brief midi音色文件读 @param @return @note 内部调用 */ /*----------------------------------------------------------------------------*/ static int midi_fread(void *file, void *buf, u32 len) { #ifndef CONFIG_MIDI_DEC_ADDR FILE *hd = (FILE *)file; if (hd) { len = fread(hd, buf, len); } #endif return len; } /*----------------------------------------------------------------------------*/ /**@brief midi音色文件seek @param @return @note 内部调用 */ /*----------------------------------------------------------------------------*/ static int midi_fseek(void *file, u32 offset, int seek_mode) { #ifndef CONFIG_MIDI_DEC_ADDR FILE *hd = (FILE *)file; if (hd) { fseek(hd, offset, seek_mode); } #endif return 0; } /*----------------------------------------------------------------------------*/ /**@brief midi ctrl初始化函数，该函数由库调用 @param 参数返回地址 @return 0 @note 该函数是弱定义函数，不可修改定义 */ /*----------------------------------------------------------------------------*/ int midi_ctrl_init(void *info) { if (!midi_ctrl_dec_hdl) { return -1; } u8 *cache_addr; if (midi_get_cfg_addr(&cache_addr)) { return -1; } midi_ctrl_open_parm *parm = (midi_ctrl_open_parm *)info; parm->ctrl_parm.tempo = 1024;//解码会改变播放速度,1024是正常值 parm->ctrl_parm.track_num = 1;//支持音轨的最大个数0~15 parm->sample_rate = midi_ctrl_dec_hdl->midi_ctrl_dec.sample_rate;//midi_samplerate_tab[5]; parm->cfg_parm.player_t = MIDI_KEY_NUM; //(支持多少个key同时发声,用户可修改) parm->cfg_parm.spi_pos = (unsigned int)cache_addr; parm->cfg_parm.fread = midi_fread; parm->cfg_parm.fseek = midi_fseek; for (int i = 0; i < ARRAY_SIZE(midi_samplerate_tab); i++) { if (parm->sample_rate == midi_samplerate_tab[i]) { parm->cfg_parm.sample_rate = i; break; } } return 0; } /*----------------------------------------------------------------------------*/ /**@brief midi ctrl音色文件关闭 @param @return @note 该函数在midi关闭时调用,该函数是弱定义函数，不可修改定义 */ /*----------------------------------------------------------------------------*/ int midi_ctrl_uninit(void *priv) { #ifndef CONFIG_MIDI_DEC_ADDR if (priv) { fclose((FILE *)priv); priv = NULL; } #endif return 0; } /*----------------------------------------------------------------------------*/ /**@brief 乐器更新 @param prog:乐器号 @param trk_num :音轨 (0~15) @return @note */ /*----------------------------------------------------------------------------*/ void midi_ctrl_set_porg(u8 prog, u8 trk_num) { struct set_prog_parm parm = {0}; parm.prog = prog; parm.trk_num = trk_num; midi_ctrl_ioctrl(MIDI_CTRL_SET_PROG, &parm); } /*----------------------------------------------------------------------------*/ /**@brief 按键按下 @param nkey:按键序号（0~127） @param nvel:按键力度（0~127） @param chn :通道(0~15) @return @note */ /*----------------------------------------------------------------------------*/ void midi_ctrl_note_on(u8 nkey, u8 nvel, u8 chn) { struct note_on_parm parm = {0}; parm.nkey = nkey; parm.nvel = nvel; parm.chn = chn; midi_ctrl_ioctrl(MIDI_CTRL_NOTE_ON, &parm); } /*----------------------------------------------------------------------------*/ /**@brief 按键松开 @param nkey:按键序号（0~127） @param chn :通道(0~15) @return @note */ /*----------------------------------------------------------------------------*/ void midi_ctrl_note_off(u8 nkey, u8 chn) { struct note_off_parm parm = {0}; parm.nkey = nkey; parm.chn = chn; midi_ctrl_ioctrl(MIDI_CTRL_NOTE_OFF, &parm); } /*----------------------------------------------------------------------------*/ /**@brief midi 配置接口 @param cmd:命令 @param priv:对应cmd的结构体 @return @note */ /*----------------------------------------------------------------------------*/ void midi_ctrl_confing(u32 cmd, void *priv) { midi_ctrl_ioctrl(cmd, priv); } /*----------------------------------------------------------------------------*/ /**@brief midi keyboard 设置按键按下音符发声的衰减系数 @param obj:控制句柄 @param samp:对应samplerate_tab坐标 @return @note 低11bit为调节衰减系数，值越小，衰减越快， 1024为默认值， 范围：0~1024 大于11bit为延时系数，节尾音长度的，值越大拉德越长，0为默认值,31延长1s,范围：0~31(延时系数无效) @example midi_ctrl_confing_set_melody_decay((衰减系数&0x7fff) | (延时系数&0x1f <<11)); */ /*----------------------------------------------------------------------------*/ void midi_ctrl_confing_set_melody_decay(u16 val) { u32 cmd = CMD_MIDI_CTRL_TEMPO; MIDI_PLAY_CTRL_TEMPO tempo = {0}; tempo.decay_val = val; tempo.tempo_val = 1024;//设置为固定1024即可 midi_ctrl_confing(cmd, (void *)&tempo); } /*----------------------------------------------------------------------------*/ /**@brief 弯音轮配置 @param pitch_val:弯音轮值,1 - 65535 ；256是正常值,对音高有作用 @param chn :通道(0~15) @return @note */ /*----------------------------------------------------------------------------*/ void midi_ctrl_pitch_bend(u16 pitch_val, u8 chn) { struct pitch_bend_parm parm = {0}; parm.pitch_val = pitch_val; parm.chn = chn; midi_ctrl_ioctrl(MIDI_CTRL_PITCH_BEND, &parm); } /*----------------------------------------------------------------------------*/ /**@brief midi ctrl解码数据流激活 @param *p: 私有句柄 @return @note */ /*----------------------------------------------------------------------------*/ static void midi_ctrl_dec_out_stream_resume(void *p) { struct _midi_obj *dec = p; #if FILE_DEC_USE_OUT_TASK if (dec->midi_ctrl_dec.dec_no_out_sound == 0) { audio_decoder_resume_out_task(&dec->midi_ctrl_dec.decoder); return ; } #endif audio_decoder_resume(&dec->midi_ctrl_dec.decoder); } /*----------------------------------------------------------------------------*/ /**@brief midi ctrl解码事件处理 @param *decoder: 解码器句柄 @param argc: 参数个数 @param *argv: 参数 @return @note */ /*----------------------------------------------------------------------------*/ static void midi_ctrl_dec_event_handler(struct audio_decoder *decoder, int argc, int *argv) { switch (argv[0]) { case AUDIO_DEC_EVENT_END: if (!midi_ctrl_dec_hdl) { log_i("midi_ctrl_dec_hdl handle err "); break; } if (midi_ctrl_dec_hdl->id != argv[1]) { log_w("midi_ctrl_dec_hdl id err : 0x%x, 0x%x \n", midi_ctrl_dec_hdl->id, argv[1]); break; } midi_ctrl_dec_close(); //audio_decoder_resume_all(&decode_task); break; } } /*----------------------------------------------------------------------------*/ /**@brief midi ctrl解码开始 @param @return 0：成功 @return 非0：失败 @note */ /*----------------------------------------------------------------------------*/ int midi_ctrl_dec_start() { int err; struct _midi_obj *dec = midi_ctrl_dec_hdl; struct audio_mixer *p_mixer = &mixer; if (!dec) { return -EINVAL; } log_i("midi_ctrl dec start: in\n"); // 打开midi ctrl解码器 err = midi_ctrl_decoder_open(&dec->midi_ctrl_dec, &decode_task); if (err) { goto __err1; } midi_ctrl_decoder_set_event_handler(&dec->midi_ctrl_dec, midi_ctrl_dec_event_handler, dec->id); // 设置叠加功能 audio_mixer_ch_open_head(&dec->mix_ch, p_mixer); audio_mixer_ch_set_src(&dec->mix_ch, 1, 0); #if FILE_DEC_USE_OUT_TASK if (dec->midi_ctrl_dec.dec_no_out_sound == 0) { audio_decoder_out_task_ch_enable(&dec->midi_ctrl_dec.decoder); } #endif // 数据流串联 struct audio_stream_entry *entries[8] = {NULL}; u8 entry_cnt = 0; entries[entry_cnt++] = &dec->midi_ctrl_dec.decoder.entry; entries[entry_cnt++] = &dec->mix_ch.entry; // 创建数据流，把所有节点连接起来 dec->stream = audio_stream_open(dec, midi_ctrl_dec_out_stream_resume); audio_stream_add_list(dec->stream, entries, entry_cnt); // 设置音频输出音量 audio_output_set_start_volume(APP_AUDIO_STATE_MUSIC); // 设置时钟 clock_set_cur(); // 开始解码 dec->midi_ctrl_dec.status = FILE_DEC_STATUS_PLAY; err = audio_decoder_start(&dec->midi_ctrl_dec.decoder); dec->start = 1; if (err) { goto __err3; } return 0; __err3: audio_mixer_ch_close(&dec->mix_ch); midi_ctrl_decoder_close(&dec->midi_ctrl_dec); if (dec->stream) { audio_stream_close(dec->stream); dec->stream = NULL; } __err1: log_w(" start err close\n"); midi_ctrl_dec_relaese(); return -1; } /*----------------------------------------------------------------------------*/ /**@brief midi ctrl解码关闭 @param @return @note */ /*----------------------------------------------------------------------------*/ static void __midi_ctrl_dec_close(void) { if (midi_ctrl_dec_hdl && midi_ctrl_dec_hdl->start) { midi_ctrl_dec_hdl->start = 0; midi_ctrl_decoder_close(&midi_ctrl_dec_hdl->midi_ctrl_dec); audio_mixer_ch_close(&midi_ctrl_dec_hdl->mix_ch); // 先关闭各个节点，最后才close数据流 if (midi_ctrl_dec_hdl->stream) { audio_stream_close(midi_ctrl_dec_hdl->stream); midi_ctrl_dec_hdl->stream = NULL; } } } /*----------------------------------------------------------------------------*/ /**@brief 关闭midi ctrl解码 @param @return @note */ /*----------------------------------------------------------------------------*/ void midi_ctrl_dec_close(void) { if (!midi_ctrl_dec_hdl) { return; } __midi_ctrl_dec_close(); midi_ctrl_dec_relaese(); clock_set_cur(); log_i("midi ctrl dec close \n\n "); } /*----------------------------------------------------------------------------*/ /**@brief midi ctrl解码资源等待 @param *wait: 句柄 @param event: 事件 @return 0：成功 @note 用于多解码打断处理 */ /*----------------------------------------------------------------------------*/ static void __midi_ctrl_dec_close(void); static int midi_ctrl_wait_res_handler(struct audio_res_wait *wait, int event) { int err = 0; log_i("midi_ctrl_wait_res_handler, event:%d\n", event); if (event == AUDIO_RES_GET) { // 启动解码 err = midi_ctrl_dec_start(); } else if (event == AUDIO_RES_PUT) { // 被打断 __midi_ctrl_dec_close(); } return err; } /*----------------------------------------------------------------------------*/ /**@brief 打开midi ctrl解码 @param sample_rate: 采样率 @param *path:音色文件路径 @return 0：成功 @return 非0：失败 @note */ /*----------------------------------------------------------------------------*/ int midi_ctrl_dec_open(u32 sample_rate, char *path) { int err = 0; int i = 0; struct _midi_obj *dec; dec = zalloc(sizeof(*dec)); if (!dec) { return -ENOMEM; } midi_ctrl_dec_hdl = dec; dec->id = rand32(); dec->path = path; dec->midi_ctrl_dec.ch_num = 2; dec->midi_ctrl_dec.output_ch_num = audio_output_channel_num(); dec->midi_ctrl_dec.output_ch_type = audio_output_channel_type(); #if TCFG_MIC_EFFECT_ENABLE dec->midi_ctrl_dec.sample_rate = MIC_EFFECT_SAMPLERATE; #else for (i = 0; i < ARRAY_SIZE(midi_samplerate_tab); i++) { if (sample_rate == midi_samplerate_tab[i]) { dec->midi_ctrl_dec.sample_rate = midi_samplerate_tab[i]; break; } } if (i >= ARRAY_SIZE(midi_samplerate_tab)) { dec->midi_ctrl_dec.sample_rate = 16000; log_e("midi sample_rate check err ,will set default 16000 Hz\n"); } #endif dec->wait.priority = 2; dec->wait.preemption = 0; dec->wait.snatch_same_prio = 1; /* dec->wait.protect = 1; */ dec->wait.handler = midi_ctrl_wait_res_handler; clock_add(DEC_MIDI_CLK); err = audio_decoder_task_add_wait(&decode_task, &dec->wait); return err; } /*----------------------------------------------------------------------------*/ /**@brief midi ctrl控制函数 @param cmd: MIDI_CTRL_NOTE_ON, //按键按下，参数结构对应struct note_on_parm MIDI_CTRL_NOTE_OFF, //按键松开，参数结构对应struct note_off_parm MIDI_CTRL_SET_PROG, //更改乐器，参数结构对应struct set_prog_parm MIDI_CTRL_PITCH_BEND, //弯音轮，参数结构对应struct pitch_bend_parm CMD_MIDI_CTRL_TEMPO, //改变节奏,参数结构对应 MIDI_PLAY_CTRL_TEMPO @param priv:对应cmd的参数地址 @return 0 @note midi解码控制例程 */ /*----------------------------------------------------------------------------*/ void midi_ctrl_ioctrl(u32 cmd, void *priv) { struct _midi_obj *dec = midi_ctrl_dec_hdl; if (!dec) { log_e("midi ctrl dec NULL\n"); return ; } log_i("midi ctrl cmd %x", cmd); audio_decoder_ioctrl(&dec->midi_ctrl_dec.decoder, cmd, priv); } #if 0 /*----------------------------------------------------------------------------*/ /**@brief midi key 测试样例 @param @return @note */ /*----------------------------------------------------------------------------*/ void midi_paly_test(u32 key) { static u8 open_close = 0; static u8 change_prog = 0; static u8 note_on_off = 0; switch (key) { case KEY_IR_NUM_0: if (!open_close) { /* midi_ctrl_dec_open(16000);//启动midi key */ /* midi_ctrl_dec_open(16000, "storage/sd0/C/MIDI.bin\0");//启动midi key */ midi_ctrl_dec_open(16000, SDFILE_RES_ROOT_PATH"MIDI.bin\0");//启动midi key } else { midi_ctrl_dec_close();//关闭midi key } open_close = !open_close; break; case KEY_IR_NUM_1: if (!change_prog) { midi_ctrl_set_porg(0, 0);//设置0号乐器，音轨0 } else { midi_ctrl_set_porg(22, 0);//设置22号乐器，音轨0 } change_prog = !change_prog; break; case KEY_IR_NUM_2: if (!note_on_off) { //模拟按键57、58、59、60、61、62,以力度127，通道0，按下测试 midi_ctrl_note_on(57, 127, 0); midi_ctrl_note_on(58, 127, 0); midi_ctrl_note_on(59, 127, 0); midi_ctrl_note_on(60, 127, 0); midi_ctrl_note_on(61, 127, 0); midi_ctrl_note_on(62, 127, 0); } else { //模拟按键57、58、59、60、61、62松开测试 midi_ctrl_note_off(57, 0); midi_ctrl_note_off(58, 0); midi_ctrl_note_off(59, 0); midi_ctrl_note_off(60, 0); midi_ctrl_note_off(61, 0); midi_ctrl_note_off(62, 0); } note_on_off = !note_on_off; break; default: break; } } #endif #endif