adolforeyna/tactility_apps
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
6bf06c8867c67ffa093c5fe8bfeef166bc34bfcf
tactility_apps/Apps/Mp3Player/main/Source/main.c
T
Adolfo Reyna 98ae52d3a8 Implement Mp3Player dynamic application
2026-06-28 22:22:57 -04:00

428 lines
15 KiB
C
Raw Blame History

#include <tt_app.h>
#include <tt_lvgl.h>
#include <tt_lvgl_toolbar.h>
#include <tactility/device.h>
#include <tactility/drivers/i2s_controller.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_log.h"
#define MINIMP3_IMPLEMENTATION
#define MINIMP3_NO_SIMD
#include "minimp3.h"
#define TAG "Mp3Player"
#define MP3_INPUT_BUFFER_SIZE 16384
typedef enum {
STATE_IDLE,
STATE_PLAYING,
STATE_PAUSED
} PlaybackState;
typedef struct {
struct Device* i2s_dev;
char filepath[512];
PlaybackState state;
// UI elements
lv_obj_t* lbl_title;
lv_obj_t* lbl_status;
lv_obj_t* bar_progress;
lv_obj_t* btn_play_pause;
lv_obj_t* btn_stop;
// Playback state variables
FILE* file;
mp3dec_t decoder;
uint8_t* input_buf;
mp3d_sample_t* pcm_buf;
size_t buffered_bytes;
bool eof;
int volume;
int sample_rate;
int channels;
// Progress calculation
size_t file_size;
size_t bytes_read_total;
TaskHandle_t playback_task_handle;
} AppCtx;
static AppCtx g_ctx;
/* ─── Update UI ─── */
static void update_ui(AppCtx* ctx) {
if (!ctx->lbl_status) return;
switch (ctx->state) {
case STATE_PLAYING:
lv_label_set_text(ctx->lbl_status, "Playing...");
lv_label_set_text(lv_obj_get_child(ctx->btn_play_pause, 0), LV_SYMBOL_PAUSE " Pause");
lv_obj_clear_state(ctx->btn_play_pause, LV_STATE_DISABLED);
lv_obj_clear_state(ctx->btn_stop, LV_STATE_DISABLED);
break;
case STATE_PAUSED:
lv_label_set_text(ctx->lbl_status, "Paused");
lv_label_set_text(lv_obj_get_child(ctx->btn_play_pause, 0), LV_SYMBOL_PLAY " Play");
lv_obj_clear_state(ctx->btn_play_pause, LV_STATE_DISABLED);
lv_obj_clear_state(ctx->btn_stop, LV_STATE_DISABLED);
break;
case STATE_IDLE:
default:
if (ctx->filepath[0] != '\0') {
lv_label_set_text(ctx->lbl_status, "Ready");
lv_obj_clear_state(ctx->btn_play_pause, LV_STATE_DISABLED);
} else {
lv_label_set_text(ctx->lbl_status, "No file loaded");
lv_obj_add_state(ctx->btn_play_pause, LV_STATE_DISABLED);
}
lv_label_set_text(lv_obj_get_child(ctx->btn_play_pause, 0), LV_SYMBOL_PLAY " Play");
lv_obj_add_state(ctx->btn_stop, LV_STATE_DISABLED);
lv_bar_set_value(ctx->bar_progress, 0, LV_ANIM_OFF);
break;
}
}
/* ─── Playback Task ─── */
static void mp3_playback_task(void* arg) {
AppCtx* ctx = (AppCtx*)arg;
ctx->file = fopen(ctx->filepath, "rb");
if (!ctx->file) {
ESP_LOGE(TAG, "Failed to open file: %s", ctx->filepath);
tt_lvgl_lock(portMAX_DELAY);
ctx->state = STATE_IDLE;
lv_label_set_text(ctx->lbl_status, "Error: File not found");
update_ui(ctx);
tt_lvgl_unlock();
ctx->playback_task_handle = NULL;
vTaskDelete(NULL);
return;
}
fseek(ctx->file, 0, SEEK_END);
ctx->file_size = ftell(ctx->file);
fseek(ctx->file, 0, SEEK_SET);
ctx->bytes_read_total = 0;
mp3dec_init(&ctx->decoder);
ctx->buffered_bytes = 0;
ctx->eof = false;
ctx->sample_rate = 0;
ctx->channels = 0;
ESP_LOGI(TAG, "Starting MP3 playback: %s (size: %d bytes)", ctx->filepath, ctx->file_size);
while (ctx->state != STATE_IDLE) {
if (ctx->state == STATE_PAUSED) {
vTaskDelay(pdMS_TO_TICKS(50));
continue;
}
// Fill input buffer
if (!ctx->eof && ctx->buffered_bytes < MP3_INPUT_BUFFER_SIZE) {
size_t to_read = MP3_INPUT_BUFFER_SIZE - ctx->buffered_bytes;
size_t read_bytes = fread(ctx->input_buf + ctx->buffered_bytes, 1, to_read, ctx->file);
ctx->buffered_bytes += read_bytes;
ctx->bytes_read_total += read_bytes;
if (read_bytes == 0) {
ctx->eof = true;
}
}
if (ctx->buffered_bytes == 0 && ctx->eof) {
ESP_LOGI(TAG, "Reached EOF");
break;
}
// Decode one frame
mp3dec_frame_info_t info;
memset(&info, 0, sizeof(info));
int samples = mp3dec_decode_frame(&ctx->decoder, ctx->input_buf, (int)ctx->buffered_bytes, ctx->pcm_buf, &info);
if (info.frame_bytes <= 0) {
if (ctx->eof) {
break;
}
// Move 1 byte forward to resync
memmove(ctx->input_buf, ctx->input_buf + 1, --ctx->buffered_bytes);
continue;
}
size_t consumed = (size_t)info.frame_bytes;
ctx->buffered_bytes -= consumed;
memmove(ctx->input_buf, ctx->input_buf + consumed, ctx->buffered_bytes);
if (samples > 0) {
// Configure I2S if format changed
if (ctx->sample_rate != info.hz || ctx->channels != info.channels) {
struct I2sConfig config = {
.communication_format = I2S_FORMAT_STAND_I2S,
.sample_rate = (uint32_t)info.hz,
.bits_per_sample = 16,
.channel_left = 0,
.channel_right = (info.channels == 2) ? 1 : I2S_CHANNEL_NONE
};
device_lock(ctx->i2s_dev);
error_t err = i2s_controller_set_config(ctx->i2s_dev, &config);
device_unlock(ctx->i2s_dev);
if (err != ERROR_NONE) {
ESP_LOGE(TAG, "Failed to set config: %d", err);
break;
}
ctx->sample_rate = info.hz;
ctx->channels = info.channels;
ESP_LOGI(TAG, "I2S configured: %d Hz, %d channels", info.hz, info.channels);
}
// Adjust volume
int vol = ctx->volume;
int16_t* samples_ptr = (int16_t*)ctx->pcm_buf;
size_t sample_count = (size_t)samples * info.channels;
for (size_t i = 0; i < sample_count; ++i) {
int32_t scaled = (int32_t)samples_ptr[i] * vol / 100;
samples_ptr[i] = (int16_t)scaled;
}
// Play audio to I2S
size_t offset = 0;
size_t data_size = sample_count * sizeof(int16_t);
bool write_err = false;
while (offset < data_size && ctx->state == STATE_PLAYING) {
size_t written = 0;
error_t err = i2s_controller_write(ctx->i2s_dev, (uint8_t*)ctx->pcm_buf + offset, data_size - offset, &written, pdMS_TO_TICKS(250));
if (err != ERROR_NONE || written == 0) {
ESP_LOGE(TAG, "I2S write failed: %d", err);
write_err = true;
break;
}
offset += written;
}
if (write_err) {
break;
}
}
// Update progress UI
if (ctx->file_size > 0) {
int pct = (int)((ctx->bytes_read_total - ctx->buffered_bytes) * 100 / ctx->file_size);
if (pct < 0) pct = 0;
if (pct > 100) pct = 100;
tt_lvgl_lock(portMAX_DELAY);
lv_bar_set_value(ctx->bar_progress, pct, LV_ANIM_OFF);
tt_lvgl_unlock();
}
taskYIELD();
}
fclose(ctx->file);
ctx->file = NULL;
ESP_LOGI(TAG, "Playback task finished");
tt_lvgl_lock(portMAX_DELAY);
ctx->state = STATE_IDLE;
update_ui(ctx);
tt_lvgl_unlock();
ctx->playback_task_handle = NULL;
vTaskDelete(NULL);
}
/* ─── Callbacks ─── */
static void on_play_pause_click(lv_event_t* e) {
AppCtx* ctx = (AppCtx*)lv_event_get_user_data(e);
if (ctx->filepath[0] == '\0') return;
if (ctx->state == STATE_IDLE) {
ctx->state = STATE_PLAYING;
update_ui(ctx);
xTaskCreate(mp3_playback_task, "mp3_play", 4096, ctx, 5, &ctx->playback_task_handle);
} else if (ctx->state == STATE_PLAYING) {
ctx->state = STATE_PAUSED;
update_ui(ctx);
} else if (ctx->state == STATE_PAUSED) {
ctx->state = STATE_PLAYING;
update_ui(ctx);
}
}
static void on_stop_click(lv_event_t* e) {
AppCtx* ctx = (AppCtx*)lv_event_get_user_data(e);
if (ctx->state == STATE_IDLE) return;
ctx->state = STATE_IDLE;
update_ui(ctx);
}
/* ─── App Lifecycle ─── */
static void onShowApp(AppHandle app, void* data, lv_obj_t* parent) {
memset(&g_ctx, 0, sizeof(g_ctx));
g_ctx.volume = 80;
// Allocate memory buffers
g_ctx.input_buf = (uint8_t*)malloc(MP3_INPUT_BUFFER_SIZE);
g_ctx.pcm_buf = (mp3d_sample_t*)malloc(MINIMP3_MAX_SAMPLES_PER_FRAME * sizeof(mp3d_sample_t));
// Find device
g_ctx.i2s_dev = device_find_by_name("i2s0");
if (!g_ctx.i2s_dev) {
ESP_LOGE(TAG, "I2S device 'i2s0' not found!");
}
// Parse launch parameters
BundleHandle bundle = tt_app_get_parameters(app);
if (bundle) {
char file_param[256] = {0};
if (tt_bundle_opt_string(bundle, "file", file_param, sizeof(file_param))) {
// Safely resolve SD card path
if (strncmp(file_param, "/sdcard", 7) == 0) {
strncpy(g_ctx.filepath, file_param, sizeof(g_ctx.filepath) - 1);
} else {
if (file_param[0] == '/') {
snprintf(g_ctx.filepath, sizeof(g_ctx.filepath), "/sdcard%s", file_param);
} else {
snprintf(g_ctx.filepath, sizeof(g_ctx.filepath), "/sdcard/%s", file_param);
}
}
}
}
// ─── UI Layout ───
lv_obj_t* toolbar = tt_lvgl_toolbar_create_for_app(parent, app);
lv_obj_align(toolbar, LV_ALIGN_TOP_MID, 0, 0);
// Player Card (rounded box)
lv_obj_t* card = lv_obj_create(parent);
lv_obj_set_size(card, lv_pct(90), lv_pct(70));
lv_obj_align(card, LV_ALIGN_CENTER, 0, 15);
lv_obj_set_style_radius(card, 15, 0);
lv_obj_set_style_bg_color(card, lv_color_hex(0x1E1E2E), 0);
lv_obj_set_style_border_color(card, lv_color_hex(0x313244), 0);
lv_obj_set_style_border_width(card, 2, 0);
lv_obj_set_flex_flow(card, LV_FLEX_FLOW_COLUMN);
lv_obj_set_flex_align(card, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
lv_obj_set_style_pad_all(card, 15, 0);
lv_obj_set_style_pad_gap(card, 15, 0);
// Audio Icon
lv_obj_t* icon = lv_label_create(card);
lv_label_set_text(icon, LV_SYMBOL_AUDIO);
lv_obj_set_style_text_color(icon, lv_color_hex(0x89B4FA), 0);
// Track Title
g_ctx.lbl_title = lv_label_create(card);
lv_obj_set_width(g_ctx.lbl_title, lv_pct(95));
lv_obj_set_style_text_align(g_ctx.lbl_title, LV_TEXT_ALIGN_CENTER, 0);
lv_obj_set_style_text_color(g_ctx.lbl_title, lv_color_hex(0xCDD6F4), 0);
if (g_ctx.filepath[0] != '\0') {
const char* last_slash = strrchr(g_ctx.filepath, '/');
const char* filename = last_slash ? last_slash + 1 : g_ctx.filepath;
lv_label_set_text(g_ctx.lbl_title, filename);
lv_label_set_long_mode(g_ctx.lbl_title, LV_LABEL_LONG_SCROLL_CIRCULAR);
} else {
lv_label_set_text(g_ctx.lbl_title, "No File Parameter");
}
// Playback Status
g_ctx.lbl_status = lv_label_create(card);
lv_obj_set_style_text_color(g_ctx.lbl_status, lv_color_hex(0xA6ADC8), 0);
// Progress Bar
g_ctx.bar_progress = lv_bar_create(card);
lv_obj_set_size(g_ctx.bar_progress, lv_pct(85), 8);
lv_bar_set_range(g_ctx.bar_progress, 0, 100);
lv_bar_set_value(g_ctx.bar_progress, 0, LV_ANIM_OFF);
lv_obj_set_style_bg_color(g_ctx.bar_progress, lv_color_hex(0x45475A), LV_PART_MAIN);
lv_obj_set_style_bg_color(g_ctx.bar_progress, lv_color_hex(0x89B4FA), LV_PART_INDICATOR);
// Controls Container
lv_obj_t* ctrl_box = lv_obj_create(card);
lv_obj_remove_style_all(ctrl_box);
lv_obj_set_size(ctrl_box, lv_pct(90), 45);
lv_obj_set_flex_flow(ctrl_box, LV_FLEX_FLOW_ROW);
lv_obj_set_flex_align(ctrl_box, LV_FLEX_ALIGN_SPACE_EVENLY, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
// Play/Pause Button
g_ctx.btn_play_pause = lv_btn_create(ctrl_box);
lv_obj_set_size(g_ctx.btn_play_pause, 100, 36);
lv_obj_set_style_radius(g_ctx.btn_play_pause, 18, 0);
lv_obj_set_style_bg_color(g_ctx.btn_play_pause, lv_color_hex(0x89B4FA), 0);
lv_obj_set_style_text_color(g_ctx.btn_play_pause, lv_color_hex(0x11111B), 0);
lv_obj_t* lbl_play = lv_label_create(g_ctx.btn_play_pause);
lv_label_set_text(lbl_play, LV_SYMBOL_PLAY " Play");
lv_obj_center(lbl_play);
lv_obj_add_event_cb(g_ctx.btn_play_pause, on_play_pause_click, LV_EVENT_CLICKED, &g_ctx);
// Stop Button
g_ctx.btn_stop = lv_btn_create(ctrl_box);
lv_obj_set_size(g_ctx.btn_stop, 100, 36);
lv_obj_set_style_radius(g_ctx.btn_stop, 18, 0);
lv_obj_set_style_bg_color(g_ctx.btn_stop, lv_color_hex(0xF38BA8), 0);
lv_obj_set_style_text_color(g_ctx.btn_stop, lv_color_hex(0x11111B), 0);
lv_obj_t* lbl_stop = lv_label_create(g_ctx.btn_stop);
lv_label_set_text(lbl_stop, LV_SYMBOL_STOP " Stop");
lv_obj_center(lbl_stop);
lv_obj_add_event_cb(g_ctx.btn_stop, on_stop_click, LV_EVENT_CLICKED, &g_ctx);
if (!g_ctx.i2s_dev) {
lv_label_set_text(g_ctx.lbl_status, "Error: I2S Not Found");
lv_obj_add_state(g_ctx.btn_play_pause, LV_STATE_DISABLED);
lv_obj_add_state(g_ctx.btn_stop, LV_STATE_DISABLED);
} else if (!g_ctx.input_buf || !g_ctx.pcm_buf) {
lv_label_set_text(g_ctx.lbl_status, "Error: Out of Memory");
lv_obj_add_state(g_ctx.btn_play_pause, LV_STATE_DISABLED);
lv_obj_add_state(g_ctx.btn_stop, LV_STATE_DISABLED);
} else {
g_ctx.state = STATE_IDLE;
update_ui(&g_ctx);
// Auto-play if a file parameter was provided
if (g_ctx.filepath[0] != '\0') {
g_ctx.state = STATE_PLAYING;
update_ui(&g_ctx);
xTaskCreate(mp3_playback_task, "mp3_play", 4096, &g_ctx, 5, &g_ctx.playback_task_handle);
}
}
}
static void onHideApp(AppHandle app, void* data) {
if (g_ctx.state != STATE_IDLE) {
g_ctx.state = STATE_IDLE; // Signal task to stop
}
// Wait for the task to finish self-deletion to prevent resource leaks
while (g_ctx.playback_task_handle != NULL) {
vTaskDelay(pdMS_TO_TICKS(10));
}
if (g_ctx.input_buf) {
free(g_ctx.input_buf);
g_ctx.input_buf = NULL;
}
if (g_ctx.pcm_buf) {
free(g_ctx.pcm_buf);
g_ctx.pcm_buf = NULL;
}
}
int main(int argc, char* argv[]) {
tt_app_register((AppRegistration) {
.onShow = onShowApp,
.onHide = onHideApp
});
return 0;
}
Reference in New Issue View Git Blame Copy Permalink