From fb37b4715eb6407484b277b43d1ac563fef25b7a Mon Sep 17 00:00:00 2001
From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Sat, 22 Mar 2025 11:50:47 +0100
Subject: [PATCH] avimux: add palette change chunks to the index
---
nihav-commonfmt/src/muxers/avi.rs | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/nihav-commonfmt/src/muxers/avi.rs b/nihav-commonfmt/src/muxers/avi.rs
index 8071c4d..a739f49 100644
--- a/nihav-commonfmt/src/muxers/avi.rs
+++ b/nihav-commonfmt/src/muxers/avi.rs
@@ -286,9 +286,15 @@ impl<'a> MuxCore<'a> for AVIMuxer<'a> {
let end_clr = 256usize;
if start_clr < end_clr {
let chunk_len = ((end_clr - start_clr) as u32) * 4 + 4;
- self.bw.write_byte(b'0' + ((str_num / 10) as u8))?;
- self.bw.write_byte(b'0' + ((str_num % 10) as u8))?;
- self.bw.write_buf(b"pc")?;
+ let mut tag = gen_chunk_tag(StreamType::Video, str_num as u32);
+ tag[2] = b'p';
+ tag[3] = b'c';
+ self.index.push(IdxEntry {
+ tag,
+ key: false,
+ pos: self.bw.tell(),
+ len: chunk_len });
+ self.bw.write_buf(&tag)?;
self.bw.write_u32le(chunk_len)?;
self.bw.write_byte(start_clr as u8)?;
self.bw.write_byte((end_clr - start_clr) as u8)?;
@@ -326,7 +332,10 @@ impl<'a> MuxCore<'a> for AVIMuxer<'a> {
self.bw.write_u32le((self.index.len() * 16) as u32)?;
for item in self.index.iter() {
self.bw.write_buf(&item.tag)?;
- self.bw.write_u32le(if item.key { 0x10 } else { 0 })?;
+ let flags = if item.key { 0x10 }
+ else if &item.tag[2..] == b"pc" { 0x100 }
+ else { 0 };
+ self.bw.write_u32le(flags)?;
self.bw.write_u32le(item.pos as u32)?;
self.bw.write_u32le(item.len)?;
}
--
2.39.5