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avcodec/xwdenc: do not rely on AV_PIX_FMT_FLAG_PSEUDOPAL palettes 

This is the only code I found within FFmpeg that still inherently
requires AV_PIX_FMT_FLAG_PSEUDOPAL. It's easily changed not to require
it.

Preparation for the next patch.
This commit is contained in:
wm4 2018-03-29 15:10:15 +02:00
parent be3a051ca8
commit e53d3348d1
1 changed files with 8 additions and 1 deletions
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9
libavcodec/xwdenc.c
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@ -41,6 +41,7 @@ static int xwd_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
int i, out_size, ret;
uint8_t *ptr, *buf;
AVFrame * const p = (AVFrame *)pict;
uint32_t pal[256];
pixdepth = av_get_bits_per_pixel(desc);
if (desc->flags & AV_PIX_FMT_FLAG_BE)
@ -180,11 +181,17 @@ static int xwd_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
bytestream_put_be32(&buf, 0); // window border width
bytestream_put_buffer(&buf, WINDOW_NAME, WINDOW_NAME_SIZE);
if (pix_fmt == AV_PIX_FMT_PAL8) {
memcpy(pal, p->data[1], sizeof(pal));
} else {
avpriv_set_systematic_pal2(pal, pix_fmt);
}
for (i = 0; i < ncolors; i++) {
uint32_t val;
uint8_t red, green, blue;
val = AV_RN32A(p->data[1] + i * 4);
val = pal[i];
red = (val >> 16) & 0xFF;
green = (val >> 8) & 0xFF;
blue = val & 0xFF;