264 lines
7.1 KiB
C
264 lines
7.1 KiB
C
// Module for interfacing with PCM functionality
|
|
|
|
#include "module.h"
|
|
#include "lauxlib.h"
|
|
#include "task/task.h"
|
|
#include "c_string.h"
|
|
#include "c_stdlib.h"
|
|
|
|
#include "pcm.h"
|
|
#include "pcm_drv.h"
|
|
|
|
|
|
#define GET_PUD() pud_t *pud = (pud_t *)luaL_checkudata(L, 1, "pcm.driver"); \
|
|
cfg_t *cfg = &(pud->cfg);
|
|
|
|
#define UNREF_CB(_cb) luaL_unref( L, LUA_REGISTRYINDEX, _cb ); \
|
|
_cb = LUA_NOREF;
|
|
|
|
#define COND_REF(_cond) _cond ? luaL_ref( L, LUA_REGISTRYINDEX ) : LUA_NOREF
|
|
|
|
|
|
static void dispatch_callback( lua_State *L, int self_ref, int cb_ref, int returns )
|
|
{
|
|
if (cb_ref != LUA_NOREF) {
|
|
lua_rawgeti( L, LUA_REGISTRYINDEX, cb_ref );
|
|
lua_rawgeti( L, LUA_REGISTRYINDEX, self_ref );
|
|
lua_call( L, 1, returns );
|
|
}
|
|
}
|
|
|
|
static int pcm_drv_free( lua_State *L )
|
|
{
|
|
GET_PUD();
|
|
|
|
UNREF_CB( cfg->cb_data_ref );
|
|
UNREF_CB( cfg->cb_drained_ref );
|
|
UNREF_CB( cfg->cb_paused_ref );
|
|
UNREF_CB( cfg->cb_stopped_ref );
|
|
UNREF_CB( cfg->cb_vu_ref );
|
|
UNREF_CB( cfg->self_ref );
|
|
|
|
if (cfg->bufs[0].data) {
|
|
c_free( cfg->bufs[0].data );
|
|
cfg->bufs[0].data = NULL;
|
|
}
|
|
if (cfg->bufs[1].data) {
|
|
c_free( cfg->bufs[1].data );
|
|
cfg->bufs[1].data = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Lua: drv:close()
|
|
static int pcm_drv_close( lua_State *L )
|
|
{
|
|
GET_PUD();
|
|
|
|
pud->drv->close( cfg );
|
|
|
|
return pcm_drv_free( L );
|
|
}
|
|
|
|
// Lua: drv:stop(self)
|
|
static int pcm_drv_stop( lua_State *L )
|
|
{
|
|
GET_PUD();
|
|
|
|
// throttle ISR and reader
|
|
cfg->isr_throttled = -1;
|
|
|
|
pud->drv->stop( cfg );
|
|
|
|
// invalidate the buffers
|
|
cfg->bufs[0].empty = cfg->bufs[1].empty = TRUE;
|
|
|
|
dispatch_callback( L, cfg->self_ref, cfg->cb_stopped_ref, 0 );
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Lua: drv:pause(self)
|
|
static int pcm_drv_pause( lua_State *L )
|
|
{
|
|
GET_PUD();
|
|
|
|
// throttle ISR and reader
|
|
cfg->isr_throttled = -1;
|
|
|
|
pud->drv->stop( cfg );
|
|
|
|
dispatch_callback( L, cfg->self_ref, cfg->cb_paused_ref, 0 );
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pcm_start_play_task( task_param_t param, uint8 prio )
|
|
{
|
|
lua_State *L = lua_getstate();
|
|
pud_t *pud = (pud_t *)param;
|
|
cfg_t *cfg = &(pud->cfg);
|
|
|
|
// stop driver before starting it in case it hasn't been stopped from Lua
|
|
pud->drv->stop( cfg );
|
|
|
|
if (!pud->drv->play( cfg )) {
|
|
luaL_error( L, "pcm driver start" );
|
|
}
|
|
|
|
// unthrottle ISR and reader
|
|
pud->cfg.isr_throttled = 0;
|
|
}
|
|
|
|
// Lua: drv:play(self, rate)
|
|
static int pcm_drv_play( lua_State *L )
|
|
{
|
|
GET_PUD();
|
|
|
|
cfg->rate = luaL_optinteger( L, 2, PCM_RATE_8K );
|
|
|
|
luaL_argcheck( L, (cfg->rate >= PCM_RATE_1K) && (cfg->rate <= PCM_RATE_16K), 2, "invalid bit rate" );
|
|
|
|
if (cfg->self_ref == LUA_NOREF) {
|
|
lua_pushvalue( L, 1 ); // copy self userdata to the top of stack
|
|
cfg->self_ref = luaL_ref( L, LUA_REGISTRYINDEX );
|
|
}
|
|
|
|
// schedule actions for play in separate task since drv:play() might have been called
|
|
// in the callback fn of pcm_data_play_task() which in turn gets called when starting play...
|
|
task_post_low( cfg->start_play_task, (os_param_t)pud );
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Lua: drv.on(self, event, cb_fn)
|
|
static int pcm_drv_on( lua_State *L )
|
|
{
|
|
size_t len;
|
|
const char *event;
|
|
uint8_t is_func = FALSE;
|
|
|
|
GET_PUD();
|
|
|
|
event = luaL_checklstring( L, 2, &len );
|
|
|
|
if ((lua_type( L, 3 ) == LUA_TFUNCTION) ||
|
|
(lua_type( L, 3 ) == LUA_TLIGHTFUNCTION)) {
|
|
lua_pushvalue( L, 3 ); // copy argument (func) to the top of stack
|
|
is_func = TRUE;
|
|
}
|
|
|
|
if ((len == 4) && (c_strcmp( event, "data" ) == 0)) {
|
|
luaL_unref( L, LUA_REGISTRYINDEX, cfg->cb_data_ref);
|
|
cfg->cb_data_ref = COND_REF( is_func );
|
|
} else if ((len == 7) && (c_strcmp( event, "drained" ) == 0)) {
|
|
luaL_unref( L, LUA_REGISTRYINDEX, cfg->cb_drained_ref);
|
|
cfg->cb_drained_ref = COND_REF( is_func );
|
|
} else if ((len == 6) && (c_strcmp( event, "paused" ) == 0)) {
|
|
luaL_unref( L, LUA_REGISTRYINDEX, cfg->cb_paused_ref);
|
|
cfg->cb_paused_ref = COND_REF( is_func );
|
|
} else if ((len == 7) && (c_strcmp( event, "stopped" ) == 0)) {
|
|
luaL_unref( L, LUA_REGISTRYINDEX, cfg->cb_stopped_ref);
|
|
cfg->cb_stopped_ref = COND_REF( is_func );
|
|
} else if ((len == 2) && (c_strcmp( event, "vu" ) == 0)) {
|
|
luaL_unref( L, LUA_REGISTRYINDEX, cfg->cb_vu_ref);
|
|
cfg->cb_vu_ref = COND_REF( is_func );
|
|
|
|
int freq = luaL_optinteger( L, 4, 10 );
|
|
luaL_argcheck( L, (freq > 0) && (freq <= 200), 4, "invalid range" );
|
|
cfg->vu_freq = (uint8_t)freq;
|
|
} else {
|
|
if (is_func) {
|
|
// need to pop pushed function arg
|
|
lua_pop( L, 1 );
|
|
}
|
|
return luaL_error( L, "method not supported" );
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Lua: pcm.new( type, pin )
|
|
static int pcm_new( lua_State *L )
|
|
{
|
|
pud_t *pud = (pud_t *) lua_newuserdata( L, sizeof( pud_t ) );
|
|
cfg_t *cfg = &(pud->cfg);
|
|
int driver;
|
|
|
|
cfg->rbuf_idx = cfg->fbuf_idx = 0;
|
|
cfg->isr_throttled = -1; // start ISR and reader in throttled mode
|
|
|
|
driver = luaL_checkinteger( L, 1 );
|
|
luaL_argcheck( L, (driver >= 0) && (driver < PCM_DRIVER_END), 1, "invalid driver" );
|
|
|
|
cfg->self_ref = LUA_NOREF;
|
|
cfg->cb_data_ref = cfg->cb_drained_ref = LUA_NOREF;
|
|
cfg->cb_paused_ref = cfg->cb_stopped_ref = LUA_NOREF;
|
|
cfg->cb_vu_ref = LUA_NOREF;
|
|
|
|
cfg->bufs[0].buf_size = cfg->bufs[1].buf_size = 0;
|
|
cfg->bufs[0].data = cfg->bufs[1].data = NULL;
|
|
cfg->bufs[0].len = cfg->bufs[1].len = 0;
|
|
cfg->bufs[0].rpos = cfg->bufs[1].rpos = 0;
|
|
cfg->bufs[0].empty = cfg->bufs[1].empty = TRUE;
|
|
|
|
cfg->data_vu_task = task_get_id( pcm_data_vu_task );
|
|
cfg->vu_freq = 10;
|
|
cfg->data_play_task = task_get_id( pcm_data_play_task );
|
|
cfg->start_play_task = task_get_id( pcm_start_play_task );
|
|
|
|
if (driver == PCM_DRIVER_SD) {
|
|
cfg->pin = luaL_checkinteger( L, 2 );
|
|
MOD_CHECK_ID(sigma_delta, cfg->pin);
|
|
|
|
pud->drv = &pcm_drv_sd;
|
|
|
|
pud->drv->init( cfg );
|
|
|
|
/* set its metatable */
|
|
lua_pushvalue( L, -1 ); // copy self userdata to the top of stack
|
|
luaL_getmetatable( L, "pcm.driver" );
|
|
lua_setmetatable( L, -2 );
|
|
|
|
return 1;
|
|
} else {
|
|
pud->drv = NULL;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
|
|
static const LUA_REG_TYPE pcm_driver_map[] = {
|
|
{ LSTRKEY( "play" ), LFUNCVAL( pcm_drv_play ) },
|
|
{ LSTRKEY( "pause" ), LFUNCVAL( pcm_drv_pause ) },
|
|
{ LSTRKEY( "stop" ), LFUNCVAL( pcm_drv_stop ) },
|
|
{ LSTRKEY( "close" ), LFUNCVAL( pcm_drv_close ) },
|
|
{ LSTRKEY( "on" ), LFUNCVAL( pcm_drv_on ) },
|
|
{ LSTRKEY( "__gc" ), LFUNCVAL( pcm_drv_free ) },
|
|
{ LSTRKEY( "__index" ), LROVAL( pcm_driver_map ) },
|
|
{ LNILKEY, LNILVAL }
|
|
};
|
|
|
|
// Module function map
|
|
static const LUA_REG_TYPE pcm_map[] = {
|
|
{ LSTRKEY( "new" ), LFUNCVAL( pcm_new ) },
|
|
{ LSTRKEY( "SD" ), LNUMVAL( PCM_DRIVER_SD ) },
|
|
{ LSTRKEY( "RATE_1K" ), LNUMVAL( PCM_RATE_1K ) },
|
|
{ LSTRKEY( "RATE_2K" ), LNUMVAL( PCM_RATE_2K ) },
|
|
{ LSTRKEY( "RATE_4K" ), LNUMVAL( PCM_RATE_4K ) },
|
|
{ LSTRKEY( "RATE_5K" ), LNUMVAL( PCM_RATE_5K ) },
|
|
{ LSTRKEY( "RATE_8K" ), LNUMVAL( PCM_RATE_8K ) },
|
|
{ LSTRKEY( "RATE_10K" ), LNUMVAL( PCM_RATE_10K ) },
|
|
{ LSTRKEY( "RATE_12K" ), LNUMVAL( PCM_RATE_12K ) },
|
|
{ LSTRKEY( "RATE_16K" ), LNUMVAL( PCM_RATE_16K ) },
|
|
{ LNILKEY, LNILVAL }
|
|
};
|
|
|
|
int luaopen_pcm( lua_State *L ) {
|
|
luaL_rometatable( L, "pcm.driver", (void *)pcm_driver_map ); // create metatable
|
|
return 0;
|
|
}
|
|
|
|
NODEMCU_MODULE(PCM, "pcm", pcm_map, luaopen_pcm);
|