void *ai_audio_context_save( uint8_t *status, uint16_t *size )
{
if( !ai_async_audio_context_save() )
{
*status = false;
return NULL;
}
do
{
AI_SYNC_TASK_CALL_BACK();
ai_async_cmd_task();
}while( !is_ai_async_cmd_finished() );
*status = ai_async_cmd_out_status();
*size = ai_async_cmd_out_SizeArrayU8();
return (void *)ai_async_cmd_out_PtrArrayU8();
}
static void track_changed_task(struct state_machine_context *state_m)
{
// By default, the command executed is asynchronous.
state_m->async_cmd = true;
Ai_player_flag_t player_flag_temp;
switch (state_m->state)
{
case STATE_TRACK_CHANGED_ENTRY_POINT:
memset(&state_m->info, 0, sizeof(struct file_info));
ai_async_audio_nav_file_info_duration();
state_m->state = STATE_TRACK_CHANGED_TOTAL_TIME;
break;
// Record total time info and call file name.
case STATE_TRACK_CHANGED_TOTAL_TIME:
state_m->info.total_time = ai_async_cmd_out_u32();
ai_async_audio_nav_getname();
state_m->state = STATE_TRACK_CHANGED_FILE_NAME;
break;
// Record file name information and call for artist metadata.
case STATE_TRACK_CHANGED_FILE_NAME:
unicode2ascii((char *) state_m->info.name,
(const char *) ai_async_cmd_out_PtrArrayU8(),
Min(ai_async_cmd_out_SizeArrayU8(), STR_MAX_LENGTH*2));
ai_async_audio_nav_file_info_artist();
state_m->state = STATE_TRACK_CHANGED_ARTIST;
break;
// Record artist metadata and call title metadata.
case STATE_TRACK_CHANGED_ARTIST:
unicode2ascii((char *) state_m->info.artist,
(const char *) ai_async_cmd_out_PtrArrayU8(),
Min(ai_async_cmd_out_SizeArrayU8(), STR_MAX_LENGTH*2));
ai_async_audio_nav_file_info_title();
state_m->state = STATE_TRACK_CHANGED_TITLE;
break;
// Record title metadata.
case STATE_TRACK_CHANGED_TITLE:
unicode2ascii((char *) state_m->info.title,
(const char *) ai_async_cmd_out_PtrArrayU8(),
Min(ai_async_cmd_out_SizeArrayU8(), STR_MAX_LENGTH*2));
#if defined(SUPPORT_EMBEDDED_COVER_ARTS) && SUPPORT_EMBEDDED_COVER_ARTS == true
state_m->info.size.width = 100;
state_m->info.size.height = 100;
ai_async_audio_nav_file_info_image(&state_m->info.size);
state_m->state = STATE_TRACK_CHANGED_IMAGE;
#else
ai_async_audio_ctrl_status();
state_m->state = STATE_TRACK_CHECK_RESUME;
#endif
break;
// Record image data.
case STATE_TRACK_CHANGED_IMAGE:
state_m->info.image_data = (void *) ai_async_cmd_out_u32();
ai_async_audio_ctrl_status();
state_m->state = STATE_TRACK_CHECK_RESUME;
break;
// Resume the track
case STATE_TRACK_CHANGED_RESUME:
state_m->async_cmd = false;
state_m->state = state_m->recorded_state;
break;
// Check if the device is in pause before sending a ai_async_audio_ctrl_resume()
// command.
case STATE_TRACK_CHECK_RESUME:
player_flag_temp.all = ai_async_cmd_out_u32();
if (player_flag_temp.status == PLAYER_FLAG_PAUSE)
ai_async_audio_ctrl_resume();
state_m->state = STATE_TRACK_CHANGED_RESUME;
break;
default:
return;
}
// Error management
if (state_m->cmd_status == false)
state_m->state = STATE_DEVICE_DISCONNECTED;
}
static void navigation_task(struct state_machine_context *state_m)
{
static size_t item_updated;
static uint16_t temp_cursor_pos;
size_t i;
// By default, the command executed is asynchronous.
state_m->async_cmd = true;
state_m->view = GUI_UPDATE_VIEW_NAVIGATION;
switch (state_m->state)
{
// This state id the entry point of the navigation view.
// It must be call on every access to this view.
case STATE_NAVIGATION_ENTRY_POINT:
state_m->view_elt = GUI_UPDATE_ELT_NAVIGATION_CURSOR;
state_m->async_cmd = false;
state_m->cmd_status = true;
// Update file_list relatives info.
state_m->list.file_pos = 0;
state_m->list.nb_files = 0xFFFF;
state_m->list.nb_valid_entries = 0;
temp_cursor_pos = 0;
state_m->cursor_pointer = 0;
// Invalidate all the items on the list
for (i=0; i<MAX_BUFFER_FILE; i++)
state_m->list.list[i].updated = false;
state_m->state = STATE_NAVIGATION_UPDATE_LIST;
break;
// Update the file list from the current directory.
case STATE_NAVIGATION_UPDATE_LIST:
// Re-center the file list.
if (temp_cursor_pos < state_m->list.file_pos &&
state_m->list.nb_valid_entries)
{
// Scroll-down the list
memmove((void *) &state_m->list.list[1],
(const void *) &state_m->list.list[0],
sizeof(state_m->list.list[0])*(MAX_BUFFER_FILE - 1));
// Every element of the list have to be updated
for (i=1; i<MAX_BUFFER_FILE; i++)
state_m->list.list[i].updated = true;
// Get information of the file.
item_updated = 0;
state_m->list.file_pos--;
state_m->list.nb_valid_entries--;
ai_async_nav_file_goto(state_m->list.file_pos + item_updated);
state_m->view_elt |= GUI_UPDATE_ELT_IN_PROGRESS;
state_m->state = STATE_NAVIGATION_UPDATE_LIST_GET_NAME;
break;
}
if (temp_cursor_pos > state_m->list.file_pos &&
state_m->list.nb_valid_entries)
{
// Scroll-up the list
memmove((void *) &state_m->list.list[0],
(const void *) &state_m->list.list[1],
sizeof(state_m->list.list[0])*(MAX_BUFFER_FILE - 1));
// Every element of the list have to be updated
for (i=0; i<MAX_BUFFER_FILE-1; i++)
state_m->list.list[i].updated = true;
// Get information of the file.
item_updated = MAX_BUFFER_FILE - 1;
state_m->list.file_pos++;
state_m->list.nb_valid_entries--;
ai_async_nav_file_goto(state_m->list.file_pos + item_updated);
state_m->view_elt |= GUI_UPDATE_ELT_IN_PROGRESS;
state_m->state = STATE_NAVIGATION_UPDATE_LIST_GET_NAME;
break;
}
// There is nothing to update
state_m->async_cmd = false;
state_m->view_elt |= GUI_UPDATE_ELT_IN_PROGRESS;
state_m->state = STATE_NAVIGATION_WAIT_FOR_EVENT;
break;
// Read the file name of the file selected.
case STATE_NAVIGATION_UPDATE_LIST_GET_NAME:
// The case when there is no more files...
if (state_m->cmd_status == false)
{
state_m->list.nb_files = state_m->list.file_pos + item_updated;
// If no files/folders are found in the current directory...
if (!state_m->list.nb_files)
state_m->view_elt |= GUI_UPDATE_ELT_NAVIGATION_NO_FILES;
state_m->cmd_status = true;
state_m->async_cmd = false;
navigation_update_view(state_m);
state_m->state = STATE_NAVIGATION_WAIT_FOR_EVENT;
break;
}
ai_async_nav_file_name();
state_m->view_elt |= GUI_UPDATE_ELT_IN_PROGRESS;
state_m->state = STATE_NAVIGATION_UPDATE_LIST_STORE_NAME;
break;
// Store the file name of the selected file.
case STATE_NAVIGATION_UPDATE_LIST_STORE_NAME:
unicode2ascii((char *) state_m->list.list[item_updated].file_name,
(const char *) ai_async_cmd_out_PtrArrayU8(),
Min(ai_async_cmd_out_SizeArrayU8(), STR_MAX_LENGTH*2));
ai_async_nav_file_isdir();
state_m->view_elt |= GUI_UPDATE_ELT_IN_PROGRESS;
state_m->state = STATE_NAVIGATION_UPDATE_ISDIR;
break;
// Check if the selected file is a directory or not.
case STATE_NAVIGATION_UPDATE_ISDIR:
state_m->list.list[item_updated].type = (ai_async_cmd_out_u32())?FILE_TYPE_DIRECTORY:FILE_TYPE_FILE;
state_m->list.list[item_updated].updated = true;
state_m->list.nb_valid_entries++;
navigation_update_view(state_m);
state_m->async_cmd = false;
state_m->view_elt |= GUI_UPDATE_ELT_IN_PROGRESS;
state_m->state = STATE_NAVIGATION_UPDATE_LIST;
break;
// This state is the "idle" state of this view.
case STATE_NAVIGATION_WAIT_FOR_EVENT:
// Catch new track event
state_m->cmd_status = true;
if (state_m->player_status.flags.new_file_played)
{
state_m->async_cmd = false;
state_m->player_status.flags.new_file_played = 0;
state_m->recorded_state = STATE_NAVIGATION_WAIT_FOR_EVENT;
state_m->state = STATE_TRACK_CHANGED_ENTRY_POINT;
break;
}
// Switch to playback view
else if (controller_switch_to_playback_view(GUI_UPDATE_VIEW_NAVIGATION))
{
controller_clear();
state_m->async_cmd = false;
state_m->state = STATE_PLAYBACK_ENTRY_POINT;
break;
}
// Switch to configuration view
else if (controller_switch_to_config_view(GUI_UPDATE_VIEW_NAVIGATION))
{
controller_clear();
state_m->async_cmd = false;
state_m->state = STATE_CONFIG_ENTRY_POINT;
break;
}
// Go up in the file list.
else if (controller_navigation_cursor_previous() &&
temp_cursor_pos)
{
state_m->async_cmd = false;
temp_cursor_pos--;
state_m->state = STATE_NAVIGATION_UPDATE_LIST;
break;
}
// Go down in the file list.
else if (controller_navigation_cursor_next() &&
(temp_cursor_pos + 1 < state_m->list.file_pos + state_m->list.nb_valid_entries))
{
state_m->async_cmd = false;
temp_cursor_pos++;
state_m->state = STATE_NAVIGATION_UPDATE_LIST;
break;
}
// Enter directory of play the file.
else if (controller_navigation_change_directory())
{
if (navigation_get_current_file_type(state_m) == FILE_TYPE_FILE)
{
ai_async_nav_file_goto(temp_cursor_pos);
state_m->state = STATE_NAVIGATION_PLAY_SELECTED_FILE;
break;
}
else
{
ai_async_nav_file_goto(temp_cursor_pos);
state_m->state = STATE_NAVIGATION_CD;
break;
}
}
// Go to parent directory.
else if (controller_navigation_go_to_parent_directory())
{
ai_async_nav_file_goto(temp_cursor_pos);
state_m->state = STATE_NAVIGATION_GOTOPARENT;
break;
}
// Play the file or the directory.
else if (controller_navigation_play())
{
ai_async_nav_file_goto(temp_cursor_pos);
state_m->state = STATE_NAVIGATION_PLAY_SELECTED_FILE;
break;
}
// Fill the file list with valid data.
else if (state_m->list.nb_valid_entries < MAX_BUFFER_FILE &&
state_m->list.file_pos + state_m->list.nb_valid_entries < state_m->list.nb_files)
{
item_updated = state_m->list.nb_valid_entries;
ai_async_nav_file_goto(state_m->list.file_pos + state_m->list.nb_valid_entries);
state_m->view_elt |= GUI_UPDATE_ELT_IN_PROGRESS;
state_m->state = STATE_NAVIGATION_UPDATE_LIST_GET_NAME;
break;
}
state_m->async_cmd = false;
state_m->state = STATE_CHECK_DEVICE_ENTRY_POINT;
state_m->recorded_state = STATE_NAVIGATION_WAIT_FOR_EVENT;
break;
// Enter directory.
case STATE_NAVIGATION_CD:
ai_async_nav_dir_cd();
state_m->state = STATE_NAVIGATION_ENTRY_POINT;
break;
// Go to parent directory.
case STATE_NAVIGATION_GOTOPARENT:
state_m->cmd_status = true;
ai_async_nav_dir_gotoparent();
state_m->state = STATE_NAVIGATION_GOTOPARENT_ERROR_HANDLING;
break;
// This state handle a gotoparent error.
case STATE_NAVIGATION_GOTOPARENT_ERROR_HANDLING:
state_m->async_cmd = false;
if (state_m->cmd_status == false)
state_m->state = STATE_NAVIGATION_WAIT_FOR_EVENT;
else
state_m->state = STATE_NAVIGATION_ENTRY_POINT;
state_m->cmd_status = true;
break;
// This states play the file selected by the cursor.
case STATE_NAVIGATION_PLAY_SELECTED_FILE:
if (state_m->cmd_status)
ai_async_audio_nav_playfile();
else
{
state_m->cmd_status = true;
state_m->async_cmd = false;
state_m->state = STATE_NAVIGATION_ENTRY_POINT;
break;
}
state_m->state = STATE_NAVIGATION_WAIT_FOR_SELECTION;
break;
// This states makes sure the file has been selected
case STATE_NAVIGATION_WAIT_FOR_SELECTION:
// If we were not able to play the selected song, then play any song
if (!state_m->cmd_status)
{
state_m->cmd_status = true;
state_m->state = STATE_COMMAND_PLAY_ANY_SONG;
}
else
state_m->state = STATE_CHECK_DEVICE_ENTRY_POINT;
state_m->recorded_state = STATE_NAVIGATION_UPDATE_METADATA_AND_PLAY;
state_m->async_cmd = false;
break;
// This state update the status of the audio player.
case STATE_NAVIGATION_UPDATE_METADATA_AND_PLAY:
state_m->async_cmd = false;
state_m->player_status.flags.new_file_played = 0;
state_m->recorded_state = STATE_PLAYBACK_ENTRY_POINT;
state_m->state = STATE_TRACK_CHANGED_ENTRY_POINT;
break;
default:
return;
}
// Error management.
if (state_m->cmd_status == false)
state_m->state = STATE_NAVIGATION_WAIT_FOR_EVENT;
}