Extract audio and cue sheet from an NRG audio CD image.
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// This file is part of the NRGrip project.
//
// Copyright (c) 2016 Matteo Cypriani <mcy@lm7.fr>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//! NRG metadata structure, storing the contents of all of the NRG chunks.
use std::fmt;
use super::cuex::NrgCuex;
use super::daox::NrgDaox;
use super::sinf::NrgSinf;
use super::mtyp::NrgMtyp;
#[derive(Debug)]
pub struct NrgMetadata {
pub file_size: u64,
pub nrg_version: u8,
pub chunk_offset: u64,
pub cuex_chunk: Option<NrgCuex>,
pub daox_chunk: Option<NrgDaox>,
pub sinf_chunk: Option<NrgSinf>,
pub mtyp_chunk: Option<NrgMtyp>,
pub skipped_chunks: Vec<String>,
}
impl NrgMetadata {
pub fn new() -> NrgMetadata {
NrgMetadata {
file_size: 0,
nrg_version: 0,
chunk_offset: 0,
cuex_chunk: None,
daox_chunk: None,
sinf_chunk: None,
mtyp_chunk: None,
skipped_chunks: Vec::new(),
}
}
/// Returns the index1 of the first DAOX track in `metadata`, or 0 if there
/// are no DAOX tracks.
pub fn first_audio_byte(&self) -> u64 {
if let Some(daox_chunk) = self.daox_chunk.as_ref() {
if let Some(first_track) = daox_chunk.tracks.first() {
return first_track.index1;
}
}
0
}
/// Returns the number of the byte past the last audio byte in the image
/// (i.e. `last audio byte + 1`).
///
/// This byte is indicated by the `track_end` of the last DAOX track if at
/// least one track is present in the DAOX chunk. If not, `chunk_offset` is
/// returned.
///
/// Note that the two values should always be identical anyway, but you
/// never know.
pub fn last_audio_byte(&self) -> u64 {
if let Some(daox_chunk) = self.daox_chunk.as_ref() {
if let Some(last_track) = daox_chunk.tracks.last() {
return last_track.track_end;
}
}
self.chunk_offset
}
/// Returns the sector size of this image.
///
/// This information is retrieved from the first DAOX track only; it is
/// assumed that every track has the same sector size.
///
/// Returns 0 if there are no DAOX tracks.
pub fn sector_size(&self) -> u16 {
if let Some(daox_chunk) = self.daox_chunk.as_ref() {
if let Some(first_track) = daox_chunk.tracks.first() {
return first_track.sector_size;
}
}
0
}
}
impl fmt::Display for NrgMetadata {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
try!(write!(f, "Image size: {} Bytes\n\
NRG format version: {}\n\
First NRG chunk offset: {}",
self.file_size,
self.nrg_version,
self.chunk_offset,
));
match self.cuex_chunk {
None => {},
Some(ref chunk) => try!(write!(f, "\n\n\
{}", chunk)),
}
match self.daox_chunk {
None => {},
Some(ref chunk) => try!(write!(f, "\n\n\
{}", chunk)),
}
match self.sinf_chunk {
None => {},
Some(ref chunk) => try!(write!(f, "\n\n\
{}", chunk)),
}
match self.mtyp_chunk {
None => {},
Some(ref chunk) => try!(write!(f, "\n\n\
{}", chunk)),
}
if !self.skipped_chunks.is_empty() {
try!(write!(f, "\n\nUnhandled chunks present in this image:"));
for chunk_id in &self.skipped_chunks {
try!(write!(f, " {}", chunk_id));
}
}
Ok(())
}
}