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|
// Copyright (C) 2019 Amazon.com, Inc. or its affiliates <mkolny@amazon.com>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use glib::prelude::*;
use glib::subclass::prelude::*;
use gst::prelude::*;
use gst::subclass::prelude::*;
use gst::{gst_error, gst_info, gst_trace};
use gst_base::subclass::prelude::*;
use futures::future;
use rusoto_core::region::Region;
use rusoto_s3::{
CompleteMultipartUploadRequest, CompletedMultipartUpload, CompletedPart,
CreateMultipartUploadRequest, S3Client, UploadPartRequest, S3,
};
use once_cell::sync::Lazy;
use std::convert::From;
use std::str::FromStr;
use std::sync::Mutex;
use crate::s3utils::{self, WaitError};
struct Started {
client: S3Client,
buffer: Vec<u8>,
upload_id: String,
part_number: i64,
completed_parts: Vec<CompletedPart>,
}
impl Started {
pub fn new(client: S3Client, buffer: Vec<u8>, upload_id: String) -> Started {
Started {
client,
buffer,
upload_id,
part_number: 0,
completed_parts: Vec::new(),
}
}
pub fn increment_part_number(&mut self) -> Result<i64, gst::ErrorMessage> {
// https://docs.aws.amazon.com/AmazonS3/latest/dev/qfacts.html
const MAX_MULTIPART_NUMBER: i64 = 10000;
if self.part_number > MAX_MULTIPART_NUMBER {
return Err(gst::error_msg!(
gst::ResourceError::Failed,
[
"Maximum number of parts ({}) reached.",
MAX_MULTIPART_NUMBER
]
));
}
self.part_number += 1;
Ok(self.part_number)
}
}
enum State {
Stopped,
Started(Started),
}
impl Default for State {
fn default() -> State {
State::Stopped
}
}
const DEFAULT_BUFFER_SIZE: u64 = 5 * 1024 * 1024;
struct Settings {
region: Region,
bucket: Option<String>,
key: Option<String>,
content_type: Option<String>,
buffer_size: u64,
}
#[derive(Default)]
pub struct S3Sink {
settings: Mutex<Settings>,
state: Mutex<State>,
canceller: Mutex<Option<future::AbortHandle>>,
}
static CAT: Lazy<gst::DebugCategory> = Lazy::new(|| {
gst::DebugCategory::new(
"rusotos3sink",
gst::DebugColorFlags::empty(),
Some("Amazon S3 Sink"),
)
});
impl Default for Settings {
fn default() -> Self {
Settings {
region: Region::default(),
bucket: None,
key: None,
content_type: None,
buffer_size: DEFAULT_BUFFER_SIZE,
}
}
}
impl S3Sink {
fn flush_current_buffer(
&self,
element: &super::S3Sink,
) -> Result<(), Option<gst::ErrorMessage>> {
let upload_part_req = self.create_upload_part_request()?;
let part_number = upload_part_req.part_number;
let mut state = self.state.lock().unwrap();
let state = match *state {
State::Started(ref mut started_state) => started_state,
State::Stopped => {
unreachable!("Element should be started");
}
};
let upload_part_req_future = state.client.upload_part(upload_part_req);
let output =
s3utils::wait(&self.canceller, upload_part_req_future).map_err(|err| match err {
WaitError::FutureError(err) => Some(gst::error_msg!(
gst::ResourceError::OpenWrite,
["Failed to upload part: {}", err]
)),
WaitError::Cancelled => None,
})?;
state.completed_parts.push(CompletedPart {
e_tag: output.e_tag,
part_number: Some(part_number),
});
gst_info!(CAT, obj: element, "Uploaded part {}", part_number);
Ok(())
}
fn create_upload_part_request(&self) -> Result<UploadPartRequest, gst::ErrorMessage> {
let settings = self.settings.lock().unwrap();
let mut state = self.state.lock().unwrap();
let state = match *state {
State::Started(ref mut started_state) => started_state,
State::Stopped => {
unreachable!("Element should be started");
}
};
let part_number = state.increment_part_number()?;
Ok(UploadPartRequest {
body: Some(rusoto_core::ByteStream::from(std::mem::replace(
&mut state.buffer,
Vec::with_capacity(settings.buffer_size as usize),
))),
bucket: settings.bucket.as_ref().unwrap().to_owned(),
key: settings.key.as_ref().unwrap().to_owned(),
upload_id: state.upload_id.to_owned(),
part_number,
..Default::default()
})
}
fn create_complete_multipart_upload_request(
&self,
started_state: &mut Started,
settings: &Settings,
) -> CompleteMultipartUploadRequest {
started_state
.completed_parts
.sort_by(|a, b| a.part_number.cmp(&b.part_number));
let completed_upload = CompletedMultipartUpload {
parts: Some(std::mem::replace(
&mut started_state.completed_parts,
Vec::new(),
)),
};
CompleteMultipartUploadRequest {
bucket: settings.bucket.as_ref().unwrap().to_owned(),
key: settings.key.as_ref().unwrap().to_owned(),
upload_id: started_state.upload_id.to_owned(),
multipart_upload: Some(completed_upload),
..Default::default()
}
}
fn create_create_multipart_upload_request(
&self,
settings: &Settings,
) -> Result<CreateMultipartUploadRequest, gst::ErrorMessage> {
if settings.bucket.is_none() || settings.key.is_none() {
return Err(gst::error_msg!(
gst::ResourceError::Settings,
["Bucket or key is not defined"]
));
}
let bucket = settings.bucket.as_ref().unwrap();
let key = settings.key.as_ref().unwrap();
Ok(CreateMultipartUploadRequest {
bucket: bucket.clone(),
key: key.clone(),
content_type: settings.content_type.clone(),
..Default::default()
})
}
fn finalize_upload(&self, element: &super::S3Sink) -> Result<(), gst::ErrorMessage> {
if self.flush_current_buffer(element).is_err() {
return Err(gst::error_msg!(
gst::ResourceError::Settings,
["Failed to flush internal buffer."]
));
}
let mut state = self.state.lock().unwrap();
let started_state = match *state {
State::Started(ref mut started_state) => started_state,
State::Stopped => {
unreachable!("Element should be started");
}
};
let settings = self.settings.lock().unwrap();
let complete_req = self.create_complete_multipart_upload_request(started_state, &settings);
let complete_req_future = started_state.client.complete_multipart_upload(complete_req);
s3utils::wait(&self.canceller, complete_req_future)
.map(|_| ())
.map_err(|err| match err {
WaitError::FutureError(err) => gst::error_msg!(
gst::ResourceError::Write,
["Failed to complete multipart upload: {}.", err.to_string()]
),
WaitError::Cancelled => {
gst::error_msg!(gst::LibraryError::Failed, ["Interrupted during stop"])
}
})
}
fn start(&self) -> Result<(), gst::ErrorMessage> {
let mut state = self.state.lock().unwrap();
let settings = self.settings.lock().unwrap();
if let State::Started { .. } = *state {
unreachable!("Element should be started");
}
let client = S3Client::new(settings.region.clone());
let create_multipart_req = self.create_create_multipart_upload_request(&settings)?;
let create_multipart_req_future = client.create_multipart_upload(create_multipart_req);
let response = s3utils::wait(&self.canceller, create_multipart_req_future).map_err(
|err| match err {
WaitError::FutureError(err) => gst::error_msg!(
gst::ResourceError::OpenWrite,
["Failed to create multipart upload: {}", err]
),
WaitError::Cancelled => {
gst::error_msg!(gst::LibraryError::Failed, ["Interrupted during start"])
}
},
)?;
let upload_id = response.upload_id.ok_or_else(|| {
gst::error_msg!(
gst::ResourceError::Failed,
["Failed to get multipart upload ID"]
)
})?;
*state = State::Started(Started::new(
client,
Vec::with_capacity(settings.buffer_size as usize),
upload_id,
));
Ok(())
}
fn update_buffer(
&self,
src: &[u8],
element: &super::S3Sink,
) -> Result<(), Option<gst::ErrorMessage>> {
let mut state = self.state.lock().unwrap();
let started_state = match *state {
State::Started(ref mut started_state) => started_state,
State::Stopped => {
unreachable!("Element should be started already");
}
};
let to_copy = std::cmp::min(
started_state.buffer.capacity() - started_state.buffer.len(),
src.len(),
);
let (head, tail) = src.split_at(to_copy);
started_state.buffer.extend_from_slice(head);
let do_flush = started_state.buffer.capacity() == started_state.buffer.len();
drop(state);
if do_flush {
self.flush_current_buffer(element)?;
}
if to_copy < src.len() {
self.update_buffer(tail, element)?;
}
Ok(())
}
fn cancel(&self) {
let mut canceller = self.canceller.lock().unwrap();
if let Some(c) = canceller.take() {
c.abort()
};
}
}
#[glib::object_subclass]
impl ObjectSubclass for S3Sink {
const NAME: &'static str = "RusotoS3Sink";
type Type = super::S3Sink;
type ParentType = gst_base::BaseSink;
}
impl ObjectImpl for S3Sink {
fn properties() -> &'static [glib::ParamSpec] {
static PROPERTIES: Lazy<Vec<glib::ParamSpec>> = Lazy::new(|| {
vec![
glib::ParamSpec::new_string(
"bucket",
"S3 Bucket",
"The bucket of the file to write",
None,
glib::ParamFlags::READWRITE | gst::PARAM_FLAG_MUTABLE_READY,
),
glib::ParamSpec::new_string(
"key",
"S3 Key",
"The key of the file to write",
None,
glib::ParamFlags::READWRITE | gst::PARAM_FLAG_MUTABLE_READY,
),
glib::ParamSpec::new_string(
"region",
"AWS Region",
"An AWS region (e.g. eu-west-2).",
None,
glib::ParamFlags::READWRITE | gst::PARAM_FLAG_MUTABLE_READY,
),
glib::ParamSpec::new_uint64(
"part-size",
"Part size",
"A size (in bytes) of an individual part used for multipart upload.",
5 * 1024 * 1024, // 5 MB
5 * 1024 * 1024 * 1024, // 5 GB
DEFAULT_BUFFER_SIZE,
glib::ParamFlags::READWRITE | gst::PARAM_FLAG_MUTABLE_READY,
),
]
});
PROPERTIES.as_ref()
}
fn set_property(
&self,
_obj: &Self::Type,
_id: usize,
value: &glib::Value,
pspec: &glib::ParamSpec,
) {
let mut settings = self.settings.lock().unwrap();
match pspec.name() {
"bucket" => {
settings.bucket = value
.get::<Option<String>>()
.expect("type checked upstream");
}
"key" => {
settings.key = value
.get::<Option<String>>()
.expect("type checked upstream");
}
"region" => {
settings.region =
Region::from_str(&value.get::<String>().expect("type checked upstream"))
.unwrap();
}
"part-size" => {
settings.buffer_size = value.get::<u64>().expect("type checked upstream");
}
_ => unimplemented!(),
}
}
fn property(&self, _: &Self::Type, _id: usize, pspec: &glib::ParamSpec) -> glib::Value {
let settings = self.settings.lock().unwrap();
match pspec.name() {
"key" => settings.key.to_value(),
"bucket" => settings.bucket.to_value(),
"region" => settings.region.name().to_value(),
"part-size" => settings.buffer_size.to_value(),
_ => unimplemented!(),
}
}
}
impl ElementImpl for S3Sink {
fn metadata() -> Option<&'static gst::subclass::ElementMetadata> {
static ELEMENT_METADATA: Lazy<gst::subclass::ElementMetadata> = Lazy::new(|| {
gst::subclass::ElementMetadata::new(
"Amazon S3 sink",
"Source/Network",
"Writes an object to Amazon S3",
"Marcin Kolny <mkolny@amazon.com>",
)
});
Some(&*ELEMENT_METADATA)
}
fn pad_templates() -> &'static [gst::PadTemplate] {
static PAD_TEMPLATES: Lazy<Vec<gst::PadTemplate>> = Lazy::new(|| {
let caps = gst::Caps::new_any();
let sink_pad_template = gst::PadTemplate::new(
"sink",
gst::PadDirection::Sink,
gst::PadPresence::Always,
&caps,
)
.unwrap();
vec![sink_pad_template]
});
PAD_TEMPLATES.as_ref()
}
}
impl BaseSinkImpl for S3Sink {
fn start(&self, _element: &Self::Type) -> Result<(), gst::ErrorMessage> {
self.start()
}
fn stop(&self, element: &Self::Type) -> Result<(), gst::ErrorMessage> {
let mut state = self.state.lock().unwrap();
*state = State::Stopped;
gst_info!(CAT, obj: element, "Stopped");
Ok(())
}
fn render(
&self,
element: &Self::Type,
buffer: &gst::Buffer,
) -> Result<gst::FlowSuccess, gst::FlowError> {
if let State::Stopped = *self.state.lock().unwrap() {
gst::element_error!(element, gst::CoreError::Failed, ["Not started yet"]);
return Err(gst::FlowError::Error);
}
gst_trace!(CAT, obj: element, "Rendering {:?}", buffer);
let map = buffer.map_readable().map_err(|_| {
gst::element_error!(element, gst::CoreError::Failed, ["Failed to map buffer"]);
gst::FlowError::Error
})?;
match self.update_buffer(&map, element) {
Ok(_) => Ok(gst::FlowSuccess::Ok),
Err(err) => match err {
Some(error_message) => {
gst_error!(
CAT,
obj: element,
"Multipart upload failed: {}",
error_message
);
element.post_error_message(error_message);
Err(gst::FlowError::Error)
}
_ => {
gst_info!(CAT, obj: element, "Upload interrupted. Flushing...");
Err(gst::FlowError::Flushing)
}
},
}
}
fn unlock(&self, _element: &Self::Type) -> Result<(), gst::ErrorMessage> {
self.cancel();
Ok(())
}
fn event(&self, element: &Self::Type, event: gst::Event) -> bool {
if let gst::EventView::Eos(_) = event.view() {
if let Err(error_message) = self.finalize_upload(element) {
gst_error!(
CAT,
obj: element,
"Failed to finalize the upload: {}",
error_message
);
return false;
}
}
BaseSinkImplExt::parent_event(self, element, event)
}
}
|