*/
#include "avcodec.h"
+#include "libavutil/opt.h"
#include "get_bits.h"
#include "put_bits.h"
typedef struct CLJRContext {
+ AVClass *avclass;
AVCodecContext *avctx;
AVFrame picture;
+ int dither_type;
} CLJRContext;
static av_cold int common_init(AVCodecContext *avctx)
static int encode_frame(AVCodecContext *avctx, unsigned char *buf,
int buf_size, void *data)
{
+ CLJRContext *a = avctx->priv_data;
PutBitContext pb;
AVFrame *p = data;
int x, y;
uint8_t *cb = &p->data[1][y * p->linesize[1]];
uint8_t *cr = &p->data[2][y * p->linesize[2]];
for (x = 0; x < avctx->width; x += 4) {
+ switch (a->dither_type) {
+ case 0: dither = 0x492A0000; break;
+ case 1: dither = dither * 1664525 + 1013904223; break;
+ }
put_bits(&pb, 5, (luma[3] + (dither>>29) ) >> 3);
put_bits(&pb, 5, (luma[2] + ((dither>>26)&7)) >> 3);
put_bits(&pb, 5, (luma[1] + ((dither>>23)&7)) >> 3);
luma += 4;
put_bits(&pb, 6, (*(cb++) + ((dither>>18)&3)) >> 2);
put_bits(&pb, 6, (*(cr++) + ((dither>>16)&3)) >> 2);
- dither = dither*1664525+1013904223;
}
}
return put_bits_count(&pb) / 8;
}
+#define OFFSET(x) offsetof(CLJRContext, x)
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+ { "dither_type", "Dither type", OFFSET(dither_type), AV_OPT_TYPE_INT, { .dbl=1 }, 0, 2, VE},
+ { NULL },
+};
+
+static const AVClass class = {
+ .class_name = "cljr encoder",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
AVCodec ff_cljr_encoder = {
.name = "cljr",
.type = AVMEDIA_TYPE_VIDEO,
.pix_fmts = (const enum PixelFormat[]) { PIX_FMT_YUV411P,
PIX_FMT_NONE },
.long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
+ .priv_class = &class,
};
#endif