mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-09-27 06:20:03 +00:00
185 lines
5.4 KiB
Rust
185 lines
5.4 KiB
Rust
// Copyright (C) 2016 Sebastian Dröge <sebastian@centricular.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::u64;
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use std::io::{Read, Seek, SeekFrom};
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use std::fs::File;
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use std::path::PathBuf;
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use std::sync::Mutex;
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use url::Url;
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use std::io::Write;
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use utils::*;
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use rssource::*;
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#[derive(Debug)]
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struct Settings {
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location: Option<PathBuf>,
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}
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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 FileSrc {
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controller: SourceController,
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settings: Mutex<Settings>,
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streaming_state: Mutex<StreamingState>,
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}
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unsafe impl Sync for FileSrc {}
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unsafe impl Send for FileSrc {}
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impl FileSrc {
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pub fn new(controller: SourceController) -> FileSrc {
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FileSrc {
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controller: controller,
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settings: Mutex::new(Settings { location: None }),
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streaming_state: Mutex::new(StreamingState::Stopped),
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}
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}
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pub fn new_boxed(controller: SourceController) -> Box<Source> {
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Box::new(FileSrc::new(controller))
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}
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}
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impl Source for FileSrc {
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fn set_uri(&self, uri: Option<Url>) -> Result<(), (UriError, String)> {
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let location = &mut self.settings.lock().unwrap().location;
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match uri {
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None => {
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*location = None;
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Ok(())
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}
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Some(ref uri) => {
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match uri.to_file_path().ok() {
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Some(p) => {
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*location = Some(p);
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Ok(())
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}
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None => {
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*location = None;
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Err((UriError::UnsupportedProtocol,
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format!("Unsupported file URI '{}'", uri.as_str())))
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}
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}
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}
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}
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}
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fn get_uri(&self) -> Option<Url> {
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let location = &self.settings.lock().unwrap().location;
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location.as_ref()
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.map(|l| Url::from_file_path(l).ok())
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.and_then(|i| i) // join()
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}
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fn is_seekable(&self) -> bool {
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true
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}
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fn get_size(&self) -> u64 {
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let streaming_state = self.streaming_state.lock().unwrap();
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if let StreamingState::Started { ref file, .. } = *streaming_state {
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file.metadata()
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.ok()
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.map_or(u64::MAX, |m| m.len())
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} else {
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u64::MAX
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}
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}
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fn start(&self) -> bool {
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let location = &self.settings.lock().unwrap().location;
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let mut streaming_state = self.streaming_state.lock().unwrap();
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if let StreamingState::Started { .. } = *streaming_state {
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return false;
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}
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match *location {
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None => false,
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Some(ref location) => {
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match File::open(location.as_path()) {
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Ok(file) => {
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*streaming_state = StreamingState::Started {
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file: file,
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position: 0,
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};
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true
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}
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Err(err) => {
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println_err!("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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false
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}
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}
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}
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}
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}
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fn stop(&self) -> bool {
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let mut streaming_state = self.streaming_state.lock().unwrap();
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*streaming_state = StreamingState::Stopped;
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true
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}
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fn fill(&self, offset: u64, data: &mut [u8]) -> Result<usize, GstFlowReturn> {
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let mut streaming_state = self.streaming_state.lock().unwrap();
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if let StreamingState::Started { ref mut file, ref mut position } = *streaming_state {
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if *position != offset {
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match file.seek(SeekFrom::Start(offset)) {
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Ok(_) => {
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*position = offset;
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}
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Err(err) => {
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println_err!("Failed to seek to {}: {}", offset, err.to_string());
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return Err(GstFlowReturn::Error);
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}
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}
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}
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match file.read(data) {
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Ok(size) => {
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*position += size as u64;
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Ok(size)
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}
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Err(err) => {
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println_err!("Failed to read at {}: {}", offset, err.to_string());
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Err(GstFlowReturn::Error)
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}
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}
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} else {
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Err(GstFlowReturn::Error)
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}
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}
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fn do_seek(&self, _: u64, _: u64) -> bool {
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true
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}
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}
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