feat: implement rendering

Cargo.toml

@@ -69,7 +69,7 @@ songbird = { version = "0.6.0", default-features = false, features = [
     "tws",
 ] }
 strum = { version = "0.28.0", features = ["derive"] }
-time = { version = "0.3.47", features = ["formatting", "parsing"] }
+time = { version = "0.3.47", features = ["formatting", "macros", "parsing"] }
 tokio = { version = "1.46.0", features = ["rt-multi-thread", "macros", "signal", "time"] }
 tokio-util = { version = "0.7.18", features = ["io"] }
 tokio-websockets-0-13 = { package = "tokio-websockets", version = "0.13", features = [

src/audio_channels.rs

@@ -0,0 +1,26 @@
+use opus2::Channels;
+use strum::EnumString;
+
+#[derive(Clone, Copy, Debug, strum::Display, EnumString)]
+pub enum AudioChannels {
+    Mono,
+    Stereo,
+}
+
+impl From<AudioChannels> for Channels {
+    fn from(value: AudioChannels) -> Self {
+        match value {
+            AudioChannels::Mono => Channels::Mono,
+            AudioChannels::Stereo => Channels::Stereo,
+        }
+    }
+}
+
+impl From<AudioChannels> for songbird::driver::Channels {
+    fn from(value: AudioChannels) -> Self {
+        match value {
+            AudioChannels::Mono => songbird::driver::Channels::Mono,
+            AudioChannels::Stereo => songbird::driver::Channels::Stereo,
+        }
+    }
+}

src/audio_sample_rate.rs

@@ -0,0 +1,34 @@
+use songbird::driver::SampleRate;
+use strum::EnumString;
+
+#[derive(Clone, Copy, Debug, strum::Display, EnumString)]
+pub enum AudioSampleRate {
+    #[strum(serialize = "8000Hz")]
+    Hz8000,
+    #[strum(serialize = "12000Hz")]
+    Hz12000,
+    #[strum(serialize = "16000Hz")]
+    Hz16000,
+    #[strum(serialize = "24000Hz")]
+    Hz24000,
+    #[strum(serialize = "48000Hz")]
+    Hz48000,
+}
+
+impl From<AudioSampleRate> for SampleRate {
+    fn from(value: AudioSampleRate) -> Self {
+        match value {
+            AudioSampleRate::Hz8000 => SampleRate::Hz8000,
+            AudioSampleRate::Hz12000 => SampleRate::Hz12000,
+            AudioSampleRate::Hz16000 => SampleRate::Hz16000,
+            AudioSampleRate::Hz24000 => SampleRate::Hz24000,
+            AudioSampleRate::Hz48000 => SampleRate::Hz48000,
+        }
+    }
+}
+
+impl From<AudioSampleRate> for u32 {
+    fn from(value: AudioSampleRate) -> Self {
+        SampleRate::from(value).into()
+    }
+}

src/command/join.rs

@@ -120,8 +120,8 @@ pub async fn handle(state: State, interaction: Interaction) {
         .expect("TODO");
 
     match join_and_record()
-        .audio_channels(state.audio_channels)
-        .audio_sample_rate(state.audio_sample_rate)
+        .audio_channels(state.audio_channels.into())
+        .audio_sample_rate(state.audio_sample_rate.into())
         .guild_id(guild_id)
         .recording_manager(state.recording_manager)
         .songbird(&state.songbird)

src/command/mod.rs

@@ -16,8 +16,8 @@ use twilight_model::{
 };
 
 use crate::{
-    BotManager, GuildVoiceChannelToTextChannel, UserManager, VCsSender,
-    recording_data::RecordingManager, render_data::RenderManager,
+    AudioChannels, AudioSampleRate, BotManager, GuildVoiceChannelToTextChannel, UserManager,
+    VCsSender, recording_data::RecordingManager, render_data::RenderManager,
 };
 
 pub mod info;
@@ -29,8 +29,8 @@ pub mod render;
 
 #[derive(Debug, Clone)]
 pub struct State {
-    pub audio_channels: Channels,
-    pub audio_sample_rate: SampleRate,
+    pub audio_channels: AudioChannels,
+    pub audio_sample_rate: AudioSampleRate,
     pub bot_manager: BotManager,
     pub cancellation_token: CancellationToken,
     pub discord_application_id: Id<ApplicationMarker>,

src/command/render.rs

@@ -1,7 +1,7 @@
 use futures::TryStreamExt as _;
 use snafu::{OptionExt as _, Report, ResultExt as _, Snafu};
 use std::{collections::BTreeMap, sync::LazyLock};
-use time::{UtcDateTime, format_description::well_known::Rfc3339};
+use time::{Date, Time, UtcDateTime, format_description::well_known::Rfc3339};
 use twilight_model::{
     application::{
         command::{Command, CommandOption, CommandOptionType, CommandType},
@@ -18,7 +18,11 @@ use twilight_util::builder::{
     InteractionResponseDataBuilder, command::CommandBuilder, embed::EmbedBuilder,
 };
 
-use crate::command::State;
+use crate::{
+    command::State,
+    recording_data::{Clip, Recording, RecordingData},
+    render_data::{Render, RenderData},
+};
 
 const NAME: &str = "render";
 const DESCRIPTION: &str =
@@ -292,7 +296,7 @@ pub async fn handle(state: State, interaction: Interaction) {
     let total_samples = (duration.whole_seconds() as u32 * sample_rate)
         + (duration.subsec_microseconds() as u32 * sample_rate / 1_000_000);
 
-    let samples = vec![0; total_samples as usize];
+    let mut composite = vec![0; total_samples as usize];
 
     let mut recordings =
         state
@@ -306,7 +310,66 @@ pub async fn handle(state: State, interaction: Interaction) {
             .read(&recording)
             .await
             .expect("TODO");
-        tracing::debug!(?recording, ?recording_data);
+        let RecordingData {
+            channels,
+            sample_rate,
+            samples,
+        } = recording_data;
+
+        let Recording {
+            year,
+            month,
+            day,
+            hour,
+            minute,
+            clip,
+        } = recording;
+        let Clip {
+            second,
+            microsecond,
+            guild,
+            voice_channel,
+            user,
+        } = clip;
+
+        let date = Date::from_calendar_date(year, month, day).unwrap();
+        let time = Time::from_hms_micro(hour, minute, second, microsecond).unwrap();
+        let datetime = UtcDateTime::new(date, time);
+
+        let after_start = datetime - start;
+
+        let origin = (after_start.whole_seconds() as u32 * sample_rate)
+            + (after_start.subsec_microseconds() as u32 * sample_rate / 1_000_000);
+        let origin = origin as usize;
+
+        for (i, sample) in samples.into_iter().enumerate() {
+            if let Some(composite_sample) = composite.get_mut(origin + i) {
+                *composite_sample += sample;
+            } else {
+                tracing::error!(origin, i, total_samples, "out of range");
+            }
+        }
     }
+
+    let render = Render {
+        start,
+        end,
+        guild_id,
+        voice_channel_id,
+    };
+    let render_data = RenderData {
+        channels: state.audio_channels.into(),
+        sample_rate,
+        samples: composite,
+    };
+
+    state
+        .render_manager
+        .write(&render, render_data)
+        .await
+        .expect("TODO");
+
+    tracing::info!(%render, "written");
+
     todo!();
 }

src/heat_seek.rs

@@ -323,8 +323,8 @@ async fn follow_hottest_vc(
         match hottest_vc_option {
             Some(hottest_vc) => {
                 match join_and_record()
-                    .audio_channels(state.audio_channels)
-                    .audio_sample_rate(state.audio_sample_rate)
+                    .audio_channels(state.audio_channels.into())
+                    .audio_sample_rate(state.audio_sample_rate.into())
                     .guild_id(guild_id)
                     .recording_manager(state.recording_manager.clone())
                     .songbird(&state.songbird)

src/lib.rs

@@ -1,3 +1,5 @@
+mod audio_channels;
+mod audio_sample_rate;
 mod bot_data;
 mod call;
 pub mod command;
@@ -17,6 +19,8 @@ capnp::generated_code!(mod bot_capnp);
 capnp::generated_code!(mod user_capnp);
 shadow_rs::shadow!(build_info);
 
+pub use audio_channels::AudioChannels;
+pub use audio_sample_rate::AudioSampleRate;
 pub use bot_data::BotManager;
 pub use command::{Router as CommandRouter, State, all as all_commands};
 pub use heat_seek::heat_seek;

src/main.rs

@@ -1,18 +1,13 @@
 use clap::Parser;
 use fomo_reducer::{
-    BotManager, CommandRouter, GuildVoiceChannelToTextChannel, RecordingManager, RenderManager,
-    State, Storage, UserManager, VCsSender, all_commands, command, heat_seek, initialize_vcs,
-    update_vcs,
+    AudioChannels, AudioSampleRate, BotManager, CommandRouter, GuildVoiceChannelToTextChannel,
+    RecordingManager, RenderManager, State, Storage, UserManager, VCsSender, all_commands, command,
+    heat_seek, initialize_vcs, update_vcs,
 };
 use secrecy::{ExposeSecret, SecretString};
 use snafu::{OptionExt, ResultExt, Snafu};
-use songbird::{
-    Config, Songbird,
-    driver::{Channels, DecodeConfig, SampleRate},
-    shards::TwilightMap,
-};
+use songbird::{Config, Songbird, driver::DecodeConfig, shards::TwilightMap};
 use std::{collections::BTreeMap, fmt::Debug, str::FromStr, sync::Arc, time::Duration};
-use strum::EnumString;
 use tokio::{select, signal::ctrl_c, task::JoinSet};
 use tokio_util::{sync::CancellationToken, time::FutureExt as _};
 use tracing::Level;
@@ -33,47 +28,6 @@ use twilight_model::{
     },
 };
 
-#[derive(Clone, Copy, Debug, strum::Display, EnumString)]
-enum AudioChannels {
-    Mono,
-    Stereo,
-}
-
-impl From<AudioChannels> for Channels {
-    fn from(value: AudioChannels) -> Self {
-        match value {
-            AudioChannels::Mono => Channels::Mono,
-            AudioChannels::Stereo => Channels::Stereo,
-        }
-    }
-}
-
-#[derive(Clone, Copy, Debug, strum::Display, EnumString)]
-enum AudioSampleRate {
-    #[strum(serialize = "8000Hz")]
-    Hz8000,
-    #[strum(serialize = "12000Hz")]
-    Hz12000,
-    #[strum(serialize = "16000Hz")]
-    Hz16000,
-    #[strum(serialize = "24000Hz")]
-    Hz24000,
-    #[strum(serialize = "48000Hz")]
-    Hz48000,
-}
-
-impl From<AudioSampleRate> for SampleRate {
-    fn from(value: AudioSampleRate) -> Self {
-        match value {
-            AudioSampleRate::Hz8000 => SampleRate::Hz8000,
-            AudioSampleRate::Hz12000 => SampleRate::Hz12000,
-            AudioSampleRate::Hz16000 => SampleRate::Hz16000,
-            AudioSampleRate::Hz24000 => SampleRate::Hz24000,
-            AudioSampleRate::Hz48000 => SampleRate::Hz48000,
-        }
-    }
-}
-
 #[derive(Debug, Snafu)]
 enum ParseGuildVCToTextChannelError {
     /// the guild ID needs to be included with : before the voice channel to text channel mapping
@@ -279,15 +233,12 @@ async fn main() -> Result<(), MainError> {
             .collect(),
     );
 
-    let audio_channels = audio_channels.into();
-    let audio_sample_rate = audio_sample_rate.into();
-
     let senders = Arc::new(senders);
     let songbird = Songbird::twilight(senders, discord_user_id);
     songbird.set_config(
         Config::default().decode_mode(songbird::driver::DecodeMode::Decode(DecodeConfig::new(
-            audio_channels,
-            audio_sample_rate,
+            audio_channels.into(),
+            audio_sample_rate.into(),
         ))),
     );
 

src/recording_data/clip.rs

@@ -3,9 +3,8 @@ use snafu::{ResultExt as _, Snafu};
 use std::{fmt::Display, str::FromStr};
 
 use super::{
-    CreateListerSnafu, Day, Guild, Hour, ListError, Microsecond, Minute, Month,
-    RecordingManager, Second, User, VoiceChannel, Year, guild, microsecond, second, user,
-    voice_channel,
+    CreateListerSnafu, Day, Guild, Hour, ListError, Microsecond, Minute, Month, RecordingManager,
+    Second, User, VoiceChannel, Year, guild, microsecond, second, user, voice_channel,
 };
 
 #[derive(Debug, Clone)]

src/render_data.rs

@@ -1,4 +1,19 @@
+use std::{convert::Infallible, fmt::Display};
+
 use opendal::Operator;
+use opus2::Application;
+use songbird::driver::SampleRate;
+use time::{
+    UtcDateTime,
+    format_description::{self, StaticFormatDescription},
+    macros::format_description,
+};
+use twilight_model::id::{
+    Id,
+    marker::{ChannelMarker, GuildMarker},
+};
+
+use crate::{AudioChannels, AudioSampleRate};
 
 #[derive(Debug, Clone)]
 pub struct RenderManager {
@@ -10,3 +25,65 @@ impl RenderManager {
         Self { operator }
     }
 }
+
+#[derive(Debug, Clone)]
+pub struct Render {
+    pub start: UtcDateTime,
+    pub end: UtcDateTime,
+    pub guild_id: Id<GuildMarker>,
+    pub voice_channel_id: Id<ChannelMarker>,
+}
+
+const DATE_FORMAT: StaticFormatDescription =
+    format_description!("[year]-[month]-[day]T[hour]-[minute]-[second].[subsecond]Z");
+
+impl Display for Render {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let Self {
+            start,
+            end,
+            guild_id,
+            voice_channel_id,
+        } = self;
+
+        let start = start.format(&DATE_FORMAT).unwrap();
+        let end = end.format(&DATE_FORMAT).unwrap();
+
+        write!(f, "{guild_id}/{voice_channel_id}/{start}_{end}.opus")
+    }
+}
+
+#[derive(Debug)]
+pub struct RenderData {
+    pub channels: opus2::Channels,
+    pub sample_rate: u32,
+    pub samples: Vec<i16>,
+}
+
+impl RenderManager {
+    pub async fn write(
+        &self,
+        render: &Render,
+        RenderData {
+            channels,
+            sample_rate,
+            samples,
+        }: RenderData,
+    ) -> Result<
+        (),
+        Infallible, // TODO: a real error type
+    > {
+        let mut bytes = Vec::new();
+
+        let mut encoder =
+            opus2::Encoder::new(sample_rate, channels, Application::Audio).expect("TODO");
+
+        encoder.encode(&samples, &mut bytes).expect("TODO");
+
+        let path = render.to_string();
+
+        self.operator.write(&path, bytes).await.expect("TODO");
+
+        Ok(())
+    }
+}