--
Mats Peterson
http://matsp888.no-ip.org/~mats/
>From c27daa7279b3ccaf93d43621cc22c5ceac5c406c Mon Sep 17 00:00:00 2001
From: Mats Peterson <matsp...@yahoo.com>
Date: Sat, 20 Feb 2016 12:57:50 +0100
Subject: [PATCH v3 1/4] lavf/riffenc: Write space for palette
---
libavformat/riffenc.c | 24 ++++++++++++++++++++----
1 file changed, 20 insertions(+), 4 deletions(-)
diff --git a/libavformat/riffenc.c b/libavformat/riffenc.c
index ceb27f2..25bccf2 100644
--- a/libavformat/riffenc.c
+++ b/libavformat/riffenc.c
@@ -209,6 +209,12 @@ void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc,
int keep_height = enc->extradata_size >= 9 &&
!memcmp(enc->extradata + enc->extradata_size - 9, "BottomUp", 9);
int extradata_size = enc->extradata_size - 9*keep_height;
+ int raw_pal_avi;
+
+ raw_pal_avi = !for_asf && enc->codec_id == AV_CODEC_ID_RAWVIDEO &&
+ enc->bits_per_coded_sample >= 1 && enc->bits_per_coded_sample <= 8;
+ if (!enc->extradata_size && raw_pal_avi)
+ extradata_size = 4 * (1 << enc->bits_per_coded_sample);
/* size */
avio_wl32(pb, 40 + (ignore_extradata ? 0 :extradata_size));
@@ -228,10 +234,20 @@ void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc,
avio_wl32(pb, 0);
if (!ignore_extradata) {
- avio_write(pb, enc->extradata, extradata_size);
-
- if (!for_asf && extradata_size & 1)
- avio_w8(pb, 0);
+ if (enc->extradata_size) {
+ avio_write(pb, enc->extradata, extradata_size);
+ if (!for_asf && extradata_size & 1)
+ avio_w8(pb, 0);
+ } else if (raw_pal_avi) {
+ int i;
+ for (i = 0; i < 1 << enc->bits_per_coded_sample; i++) {
+ /* Initialize 1 bpp palette to black & white */
+ if (!i && enc->bits_per_coded_sample == 1)
+ avio_wl32(pb, 0xffffff);
+ else
+ avio_wl32(pb, 0);
+ }
+ }
}
}
--
1.7.10.4
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