Display audio messages.

src/app.rs

@@ -20,6 +20,7 @@ live_design! {
     use crate::shared::popup_list::PopupList;
     use crate::home::new_message_context_menu::*;
     use crate::shared::callout_tooltip::CalloutTooltip;
+    use crate::audio::audio_controller::AudioController;
 
 
     APP_TAB_COLOR = #344054
@@ -126,6 +127,7 @@ live_design! {
                             <PopupList> {}
                         }
                     }
+                    audio_controller = <AudioController> {}
 
                     // Context menus should be shown above other UI elements,
                     // but beneath the verification modal.
@@ -174,6 +176,7 @@ impl LiveRegister for App {
         crate::home::live_design(cx);
         crate::profile::live_design(cx);
         crate::login::live_design(cx);
+        crate::audio::live_design(cx);
     }
 }
 

src/audio/audio_controller.rs

@@ -0,0 +1,290 @@
+//! Audio controller, which just manages audio playback.
+//! In UI interaction, it is just a template.
+
+use std::{collections::HashMap, sync::{Arc, LazyLock, Mutex, RwLock}};
+use makepad_widgets::*;
+
+use super::audio_message_ui::AudioMessageUIAction;
+
+live_design! {
+    use link::theme::*;
+    use link::shaders::*;
+    use link::widgets::*;
+
+    use crate::shared::styles::*;
+    use crate::shared::icon_button::*;
+
+    // width & height is 0 because it is just a template.
+    pub AudioController = {{AudioController}} {
+        width: 0., height: 0.,
+        visible: false,
+    }
+}
+
+#[derive(Debug, Clone, DefaultNone)]
+pub enum AudioControllerAction {
+    UiToPause(WidgetUid),
+    None,
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct Audio {
+    pub data: Arc<[u8]>,
+    pub channels: u16,
+    pub bit_depth: u16
+}
+
+type Audios = HashMap<WidgetUid, (Audio, Arc<Mutex<usize>>)>;
+
+pub static AUDIO_SET: LazyLock<RwLock<Audios>> = LazyLock::new(||{
+    RwLock::new(HashMap::new())
+});
+
+#[derive(Debug, Clone, Default)]
+pub enum Selected {
+    Playing(WidgetUid, usize),
+    Paused(WidgetUid, usize),
+    #[default]
+    None,
+}
+
+#[derive(Live, LiveHook, Widget)]
+pub struct AudioController {
+    #[deref] view: View,
+    #[rust] audio: Arc<Mutex<Audio>>,
+    #[rust] selected: Arc<Mutex<Selected>>,
+}
+
+impl Drop for AudioController {
+    fn drop(&mut self) {
+        // todo!()
+    }
+}
+
+impl Widget for AudioController {
+    fn handle_event(&mut self, cx: &mut Cx, event: &Event, scope: &mut Scope) {
+        self.match_event(cx, event);
+        self.view.handle_event(cx, event, scope);
+    }
+
+    fn draw_walk(&mut self, cx: &mut Cx2d, scope: &mut Scope, walk: Walk) -> DrawStep {
+        self.view.draw_walk(cx, scope, walk)
+    }
+}
+
+impl MatchEvent for AudioController {
+    fn handle_startup(&mut self, cx: &mut Cx) {
+        let audio = self.audio.clone();
+        let selected = self.selected.clone();
+        cx.audio_output(0, move |_audio_info, output_buffer|{
+            let mut selected_mg = selected.lock().unwrap();
+            let audio_mg = audio.lock().unwrap();
+            if let Selected::Playing(uid, mut pos) = selected_mg.clone() {
+                let audio = audio_mg.clone();
+                match (audio.channels, audio.bit_depth) {
+                    (2, 16) => {
+                        // stereo 16bit
+                        output_buffer.zero();
+                        let (left, right) = output_buffer.stereo_mut();
+                        let mut i = 0;
+                        while i < left.len() {
+                            let left_i16 = i16::from_le_bytes([audio.data[pos], audio.data[pos + 1]]);
+                            let right_i16 = i16::from_le_bytes([audio.data[pos + 2], audio.data[pos + 3]]);
+
+                            left[i] = left_i16 as f32 / i16::MAX as f32;
+                            right[i] = right_i16 as f32 / i16::MAX as f32;
+                            pos += 4;
+                            i += 1;
+                            *selected_mg = Selected::Playing(uid, pos + 4);
+                        }
+                    }
+                    (2, 24) => {
+                        // stereo 24bit
+                        output_buffer.zero();
+                            let (left, right) = output_buffer.stereo_mut();
+                            let mut i = 0;
+                            while i < left.len() {
+                                let left_i32 = i32::from_le_bytes([0, audio.data[pos], audio.data[pos + 1], audio.data[pos + 2]]);
+                                let right_i32 = i32::from_le_bytes([0, audio.data[pos + 3], audio.data[pos + 4], audio.data[pos + 5]]);
+
+                                left[i] = left_i32 as f32 / i32::MAX as f32;
+                                right[i] = right_i32 as f32 / i32::MAX as f32;
+                                pos += 6;
+                                i += 1;
+                                *selected_mg = Selected::Playing(uid, pos + 6);
+                            }
+                    }
+                    (2, 32) => {
+                        // stereo 24bit
+                        output_buffer.zero();
+                            let (left, right) = output_buffer.stereo_mut();
+                            let mut i = 0;
+                            while i < left.len() {
+                                let left_i32 = i32::from_le_bytes([audio.data[pos], audio.data[pos + 1], audio.data[pos + 2], audio.data[pos + 3]]);
+                                let right_i32 = i32::from_le_bytes([audio.data[pos + 4], audio.data[pos + 5], audio.data[pos + 6], audio.data[pos + 7]]);
+
+                                left[i] = left_i32 as f32 / i32::MAX as f32;
+                                right[i] = right_i32 as f32 / i32::MAX as f32;
+                                pos += 8;
+                                i += 1;
+                                *selected_mg = Selected::Playing(uid, pos + 8);
+                            }
+                    }
+                    _ => { }
+                }
+                if pos > audio.data.len() {
+                    *selected_mg = Selected::None;
+                }
+            } else {
+                output_buffer.zero();
+            }
+        });
+    }
+
+    fn handle_audio_devices(&mut self, cx: &mut Cx, e: &AudioDevicesEvent) {
+        cx.use_audio_outputs(&e.default_output())
+    }
+    fn handle_actions(&mut self, cx: &mut Cx, actions: &Actions) {
+        for action in actions {
+            match action.downcast_ref() {
+                Some(AudioMessageUIAction::Play(new_uid)) => {
+                    let selected =self.selected.clone().lock().unwrap().clone();
+                    match selected {
+                        Selected::Playing(current_uid, current_pos) => {
+                            if &current_uid != new_uid {
+                                cx.action(AudioControllerAction::UiToPause(current_uid));
+                                if let Some((_old_uid, old_pos)) = AUDIO_SET.write().unwrap().get(&current_uid) {
+                                    *old_pos.lock().unwrap() = current_pos;
+                                }
+                                if let Some((audio, new_pos)) = AUDIO_SET.read().unwrap().get(new_uid) {
+                                    *self.audio.lock().unwrap() = audio.clone();
+                                    let new_pos = *new_pos.lock().unwrap();
+                                    *self.selected.lock().unwrap() = Selected::Playing(*new_uid, new_pos);
+                                }
+                            }
+                        }
+                        Selected::Paused(current_uid, current_pos) => {
+                            if &current_uid == new_uid {
+                                *self.selected.lock().unwrap() = Selected::Playing(*new_uid, current_pos);
+                            } else {
+                                if let Some((_, old_pos)) = AUDIO_SET.write().unwrap().get_mut(&current_uid) {
+                                    *old_pos.lock().unwrap() = current_pos;
+                                }
+
+                                if let Some((audio, new_pos)) = AUDIO_SET.read().unwrap().get(new_uid) {
+                                    *self.audio.lock().unwrap() = audio.clone();
+                                    let new_pos = *new_pos.lock().unwrap();
+                                    *self.selected.lock().unwrap() = Selected::Playing(*new_uid, new_pos);
+                                }
+                            }
+                        }
+                        Selected::None => {
+                            if let Some((audio, _old_pos)) = AUDIO_SET.write().unwrap().get_mut(new_uid) {
+                                *self.selected.lock().unwrap() = Selected::Playing(*new_uid, 44);
+                                *self.audio.lock().unwrap() = audio.clone();
+                            }
+                        }
+                    }
+                }
+                Some(AudioMessageUIAction::Pause(new_uid)) => {
+                    let selected =self.selected.clone().lock().unwrap().clone();
+                    if let Selected::Playing(current_uid, current_pos) = selected {
+                        if &current_uid == new_uid {
+                            if let Some((_, old_pos)) = AUDIO_SET.write().unwrap().get(&current_uid) {
+                                *old_pos.lock().unwrap() = current_pos;
+                            }
+                            *self.selected.lock().unwrap() = Selected::Paused(*new_uid, current_pos);
+                        }
+                    }
+                }
+                Some(AudioMessageUIAction::Stop(new_uid)) => {
+                    let selected =self.selected.clone().lock().unwrap().clone();
+                    match selected {
+                        Selected::Playing(current_uid, _current_pos) => {
+                            if &current_uid == new_uid {
+                                if let Some((_, old_pos)) = AUDIO_SET.write().unwrap().get(&current_uid) {
+                                    *old_pos.lock().unwrap() = 44;
+                                }
+                                *self.selected.lock().unwrap() = Selected::None;
+                            }
+                        }
+                        Selected::Paused(current_uid, _current_pos) => {
+                            if &current_uid == new_uid {
+                                if let Some((_, old_pos)) = AUDIO_SET.write().unwrap().get(&current_uid) {
+                                    *old_pos.lock().unwrap() = 44;
+                                }
+                            }
+                            *self.selected.lock().unwrap() = Selected::None;
+                        }
+                        _ => { }
+                    }
+                }
+                _ => { }
+            }
+        }
+    }
+}
+
+pub fn insert_new_audio(audio_control_interface_uid: WidgetUid, data: Arc<[u8]>, channels: &u16, bit_depth: &u16) {
+    let audio = Audio {
+        data,
+        channels: *channels,
+        bit_depth: *bit_depth
+    };
+    let pos = Arc::new(Mutex::new(44));
+    AUDIO_SET.write().unwrap().insert(audio_control_interface_uid, (audio, pos));
+}
+
+
+pub fn parse_wav(data: &[u8]) -> Option<(u16, u16)> {
+    // Check that the data length is sufficient, at least 44 bytes are required (standard WAV file header size)
+    if data.len() < 44 {
+        log!("Insufficient data length");
+        return None;
+    }
+
+    // Check if the first 4 bytes are 'RIFF'.
+    if &data[0..4] != b"RIFF" {
+        log!("Not a `RIFF` file");
+        return None;
+    }
+
+    // Check if bytes 8-11 are 'WAVE'.
+    if &data[8..12] != b"WAVE" {
+        log!("Not a `WAVE` file");
+        return None;
+    }
+
+    // Check if bytes 12-15 are 'fmt'.
+    if &data[12..16] != b"fmt " {
+        log!("`fmt` block not found");
+        return None;
+    }
+
+    // Read the size of the fmt block (bytes 16-19)
+    let fmt_size = u32::from_le_bytes([data[16], data[17], data[18], data[19]]);
+    if fmt_size < 16 {
+        log!("`fmt` block size too small");
+        return None;
+    }
+
+    // Read the audio format (bytes 20-21) and make sure it's PCM (value 1)
+    let audio_format = u16::from_le_bytes([data[20], data[21]]);
+    if audio_format != 1 {
+        log!("Not a `PCM` file");
+        return None;
+    }
+
+    // Extract the number of channels (bytes 22-23)
+    let channels = u16::from_le_bytes([data[22], data[23]]);
+
+    // Extract sampling rate (bytes 24-27)
+    // let sample_rate = u32::from_le_bytes([data[24], data[25], data[26], data[27]]);
+
+    // Extract bit depth (bytes 34-35)
+    let bit_depth = u16::from_le_bytes([data[34], data[35]]);
+
+    // Return the parsing result
+    // Some((channels, sample_rate, bits_per_sample))
+    Some((channels, bit_depth))
+}