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https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
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122 lines
3.7 KiB
Rust
122 lines
3.7 KiB
Rust
// Copyright (C) 2016 Sebastian Dröge <sebastian@centricular.com>
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// 2016 Luis de Bethencourt <luisbg@osg.samsung.com>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the
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// Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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// Boston, MA 02110-1301, USA.
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use std::fs::File;
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use url::Url;
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use std::io::Write;
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use std::convert::From;
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use error::*;
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use rssink::*;
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use buffer::*;
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#[derive(Debug)]
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enum StreamingState {
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Stopped,
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Started { file: File, position: u64 },
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}
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#[derive(Debug)]
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pub struct FileSink {
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streaming_state: StreamingState,
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}
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impl FileSink {
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pub fn new() -> FileSink {
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FileSink { streaming_state: StreamingState::Stopped }
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}
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pub fn new_boxed() -> Box<Sink> {
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Box::new(FileSink::new())
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}
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}
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fn validate_uri(uri: &Url) -> Result<(), UriError> {
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let _ = try!(uri.to_file_path()
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.or_else(|_| {
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Err(UriError::new(UriErrorKind::UnsupportedProtocol,
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Some(format!("Unsupported file URI '{}'", uri.as_str()))))
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}));
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Ok(())
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}
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impl Sink for FileSink {
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fn uri_validator(&self) -> Box<UriValidator> {
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Box::new(validate_uri)
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}
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fn start(&mut self, uri: Url) -> Result<(), ErrorMessage> {
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if let StreamingState::Started { .. } = self.streaming_state {
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return Err(error_msg!(SinkError::Failure, ["Sink already started"]));
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}
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let location = try!(uri.to_file_path()
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.or_else(|_| {
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Err(error_msg!(SinkError::Failure,
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["Unsupported file URI '{}'", uri.as_str()]))
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}));
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let file = try!(File::create(location.as_path()).or_else(|err| {
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Err(error_msg!(SinkError::OpenFailed,
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["Could not open file for writing '{}': {}",
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location.to_str().unwrap_or("Non-UTF8 path"),
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err.to_string()]))
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}));
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self.streaming_state = StreamingState::Started {
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file: file,
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position: 0,
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};
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Ok(())
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}
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fn stop(&mut self) -> Result<(), ErrorMessage> {
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self.streaming_state = StreamingState::Stopped;
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Ok(())
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}
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fn render(&mut self, buffer: &Buffer) -> Result<(), FlowError> {
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let (file, position) = match self.streaming_state {
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StreamingState::Started { ref mut file, ref mut position } => (file, position),
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StreamingState::Stopped => {
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return Err(FlowError::Error(error_msg!(SinkError::Failure, ["Not started yet"])));
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}
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};
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let map = match buffer.map_read() {
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None => {
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return Err(FlowError::Error(error_msg!(SinkError::Failure,
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["Failed to map buffer"])));
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}
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Some(map) => map,
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};
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let data = map.as_slice();
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try!(file.write_all(data).or_else(|err| {
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Err(FlowError::Error(error_msg!(SinkError::WriteFailed, ["Failed to write: {}", err])))
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}));
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*position += data.len() as u64;
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Ok(())
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}
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}
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