--
Mats Peterson
http://matsp888.no-ip.org/~mats/
>From 45624f6249703657bed9788bf1232289ee392f10 Mon Sep 17 00:00:00 2001
From: Mats Peterson <matsp...@yahoo.com>
Date: Fri, 19 Feb 2016 16:22:35 +0100
Subject: [PATCH 1/3] lavf/riffenc: Write space for palette
---
libavformat/riffenc.c | 23 +++++++++++++++++++----
1 file changed, 19 insertions(+), 4 deletions(-)
diff --git a/libavformat/riffenc.c b/libavformat/riffenc.c
index ceb27f2..2d12f13 100644
--- a/libavformat/riffenc.c
+++ b/libavformat/riffenc.c
@@ -210,6 +210,9 @@ void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc,
!memcmp(enc->extradata + enc->extradata_size - 9, "BottomUp", 9);
int extradata_size = enc->extradata_size - 9*keep_height;
+ if (!enc->extradata_size && enc->bits_per_coded_sample <= 8)
+ extradata_size = 4 * (1 << enc->bits_per_coded_sample);
+
/* size */
avio_wl32(pb, 40 + (ignore_extradata ? 0 :extradata_size));
avio_wl32(pb, enc->width);
@@ -228,10 +231,22 @@ 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 (enc->bits_per_coded_sample <= 8) {
+ int i;
+ int64_t *pal_offset = (int64_t *)enc->priv_data;
+ *pal_offset = avio_tell(pb);
+ 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
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
