[FFmpeg-devel] [PATCH]Fix mono pam encoding
Carl Eugen Hoyos
cehoyos at ag.or.at
Sat Dec 31 13:52:12 CET 2011
Hi!
Attached fixes encoding of mono* to pam.
The decoder is less trivial, it currently works correctly for mono pnm, fails
for monob pam.
Please comment, Carl Eugen
-------------- next part --------------
diff --git a/libavcodec/pamenc.c b/libavcodec/pamenc.c
index 28fe7e1..1cea9e6 100644
--- a/libavcodec/pamenc.c
+++ b/libavcodec/pamenc.c
@@ -50,7 +50,7 @@ static int pam_encode_frame(AVCodecContext *avctx, unsigned char *outbuf,
h = avctx->height;
w = avctx->width;
switch (avctx->pix_fmt) {
- case PIX_FMT_MONOWHITE:
+ case PIX_FMT_MONOBLACK:
n = (w + 7) >> 3;
depth = 1;
maxval = 1;
@@ -97,6 +97,13 @@ static int pam_encode_frame(AVCodecContext *avctx, unsigned char *outbuf,
}
ptr += linesize;
}
+ } else if (avctx->pix_fmt == PIX_FMT_MONOBLACK){
+ int j;
+ for (i = 0; i < h; i++) {
+ for (j = 0; j < w; j++)
+ *s->bytestream++ = ptr[j >> 3] >> (7 - j % 8) & 1;
+ ptr += linesize;
+ }
} else {
for (i = 0; i < h; i++) {
memcpy(s->bytestream, ptr, n);
@@ -115,6 +122,6 @@ AVCodec ff_pam_encoder = {
.priv_data_size = sizeof(PNMContext),
.init = ff_pnm_init,
.encode = pam_encode_frame,
- .pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, PIX_FMT_NONE},
+ .pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOBLACK, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
};
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