* Zip Motion Blocks Video (ZMBV) encoder
* Copyright (c) 2006 Konstantin Shishkov
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
*/
/**
- * @file zmbvenc.c
+ * @file
* Zip Motion Blocks Video encoder
*/
#include <stdio.h>
#include <stdlib.h>
-#include "common.h"
+#include "libavutil/intreadwrite.h"
#include "avcodec.h"
-#ifdef CONFIG_ZLIB
#include <zlib.h>
#define ZMBV_KEYFRAME 1
z_stream zstream;
} ZmbvEncContext;
+static int score_tab[256];
+
/** Block comparing function
* XXX should be optimized and moved to DSPContext
* TODO handle out of edge ME
*/
-static inline int block_cmp(uint8_t *src, int stride, uint8_t *src2, int stride2, int bw, int bh)
+static inline int block_cmp(uint8_t *src, int stride, uint8_t *src2, int stride2,
+ int bw, int bh, int *xored)
{
int sum = 0;
int i, j;
+ uint8_t histogram[256] = {0};
+ *xored = 0;
for(j = 0; j < bh; j++){
- for(i = 0; i < bw; i++)
- sum += src[i] ^ src2[i];
+ for(i = 0; i < bw; i++){
+ int t = src[i] ^ src2[i];
+ histogram[t]++;
+ *xored |= t;
+ }
src += stride;
src2 += stride2;
}
+
+ for(i = 1; i < 256; i++)
+ sum += score_tab[histogram[i]];
+
return sum;
}
/** Motion estimation function
* TODO make better ME decisions
*/
-static int zmbv_me(ZmbvEncContext *c, uint8_t *src, int sstride, uint8_t *prev, int pstride,
- int x, int y, int *mx, int *my)
+static int zmbv_me(ZmbvEncContext *c, uint8_t *src, int sstride, uint8_t *prev,
+ int pstride, int x, int y, int *mx, int *my, int *xored)
{
- int dx, dy, tx, ty, tv, bv;
+ int dx, dy, tx, ty, tv, bv, bw, bh;
*mx = *my = 0;
- bv = block_cmp(src, sstride, prev, pstride, ZMBV_BLOCK, ZMBV_BLOCK);
+ bw = FFMIN(ZMBV_BLOCK, c->avctx->width - x);
+ bh = FFMIN(ZMBV_BLOCK, c->avctx->height - y);
+ bv = block_cmp(src, sstride, prev, pstride, bw, bh, xored);
if(!bv) return 0;
- for(ty = FFMAX(y - c->range, 0); ty < FFMIN(y + c->range, c->avctx->height - ZMBV_BLOCK); ty++){
- for(tx = FFMAX(x - c->range, 0); tx < FFMIN(x + c->range, c->avctx->width - ZMBV_BLOCK); tx++){
+ for(ty = FFMAX(y - c->range, 0); ty < FFMIN(y + c->range, c->avctx->height - bh); ty++){
+ for(tx = FFMAX(x - c->range, 0); tx < FFMIN(x + c->range, c->avctx->width - bw); tx++){
if(tx == x && ty == y) continue; // we already tested this block
dx = tx - x;
dy = ty - y;
- tv = block_cmp(src, sstride, prev + dx + dy*pstride, pstride, ZMBV_BLOCK, ZMBV_BLOCK);
+ tv = block_cmp(src, sstride, prev + dx + dy*pstride, pstride, bw, bh, xored);
if(tv < bv){
bv = tv;
*mx = dx;
static int encode_frame(AVCodecContext *avctx, uint8_t *buf, int buf_size, void *data)
{
- ZmbvEncContext * const c = (ZmbvEncContext *)avctx->priv_data;
+ ZmbvEncContext * const c = avctx->priv_data;
AVFrame *pict = data;
AVFrame * const p = &c->pic;
uint8_t *src, *prev;
uint32_t *palptr;
- int zret = Z_OK;
int len = 0;
int keyframe, chpal;
int fl;
if(chpal){
uint8_t tpal[3];
for(i = 0; i < 256; i++){
- tpal[0] = palptr[i] >> 16;
- tpal[1] = palptr[i] >> 8;
- tpal[2] = palptr[i];
+ AV_WB24(tpal, palptr[i]);
c->work_buf[work_size++] = tpal[0] ^ c->pal[i * 3 + 0];
c->work_buf[work_size++] = tpal[1] ^ c->pal[i * 3 + 1];
c->work_buf[work_size++] = tpal[2] ^ c->pal[i * 3 + 2];
}
if(keyframe){
for(i = 0; i < 256; i++){
- c->pal[i*3 + 0] = palptr[i] >> 16;
- c->pal[i*3 + 1] = palptr[i] >> 8;
- c->pal[i*3 + 2] = palptr[i];
+ AV_WB24(c->pal+(i*3), palptr[i]);
}
memcpy(c->work_buf, c->pal, 768);
memcpy(c->pal2, p->data[1], 1024);
work_size += avctx->width;
}
}else{
- int x, y, bh2, bw2;
+ int x, y, bh2, bw2, xored;
uint8_t *tsrc, *tprev;
uint8_t *mv;
int mx, my, bv;
tsrc = src + x;
tprev = prev + x;
- bv = zmbv_me(c, tsrc, p->linesize[0], tprev, c->pstride, x, y, &mx, &my);
- mv[0] = (mx << 1) | !!bv;
+ bv = zmbv_me(c, tsrc, p->linesize[0], tprev, c->pstride, x, y, &mx, &my, &xored);
+ mv[0] = (mx << 1) | !!xored;
mv[1] = my << 1;
tprev += mx + my * c->pstride;
- if(bv){
+ if(xored){
for(j = 0; j < bh2; j++){
for(i = 0; i < bw2; i++)
c->work_buf[work_size++] = tsrc[i] ^ tprev[i];
c->zstream.next_out = c->comp_buf;
c->zstream.avail_out = c->comp_size;
c->zstream.total_out = 0;
- if((zret = deflate(&c->zstream, Z_SYNC_FLUSH)) != Z_OK){
+ if(deflate(&c->zstream, Z_SYNC_FLUSH) != Z_OK){
av_log(avctx, AV_LOG_ERROR, "Error compressing data\n");
return -1;
}
/**
* Init zmbv encoder
*/
-static int encode_init(AVCodecContext *avctx)
+static av_cold int encode_init(AVCodecContext *avctx)
{
- ZmbvEncContext * const c = (ZmbvEncContext *)avctx->priv_data;
+ ZmbvEncContext * const c = avctx->priv_data;
int zret; // Zlib return code
+ int i;
int lvl = 9;
+ for(i=1; i<256; i++)
+ score_tab[i]= -i * log(i/(double)(ZMBV_BLOCK*ZMBV_BLOCK)) * (256/M_LN2);
+
c->avctx = avctx;
- c->pic.data[0] = NULL;
c->curfrm = 0;
c->keyint = avctx->keyint_min;
c->range = 8;
return -1;
}
- if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
- return -1;
- }
-
// Needed if zlib unused or init aborted before deflateInit
memset(&(c->zstream), 0, sizeof(z_stream));
c->comp_size = avctx->width * avctx->height + 1024 +
av_log(avctx, AV_LOG_ERROR, "Can't allocate compression buffer.\n");
return -1;
}
- c->pstride = (avctx->width + 15) & ~15;
+ c->pstride = FFALIGN(avctx->width, 16);
if ((c->prev = av_malloc(c->pstride * avctx->height)) == NULL) {
av_log(avctx, AV_LOG_ERROR, "Can't allocate picture.\n");
return -1;
return -1;
}
+ avctx->coded_frame = (AVFrame*)&c->pic;
+
return 0;
}
/**
- * Uninit zmbv decoder
+ * Uninit zmbv encoder
*/
-static int encode_end(AVCodecContext *avctx)
+static av_cold int encode_end(AVCodecContext *avctx)
{
- ZmbvEncContext * const c = (ZmbvEncContext *)avctx->priv_data;
+ ZmbvEncContext * const c = avctx->priv_data;
av_freep(&c->comp_buf);
av_freep(&c->work_buf);
return 0;
}
-AVCodec zmbv_encoder = {
+AVCodec ff_zmbv_encoder = {
"zmbv",
- CODEC_TYPE_VIDEO,
+ AVMEDIA_TYPE_VIDEO,
CODEC_ID_ZMBV,
sizeof(ZmbvEncContext),
encode_init,
encode_frame,
encode_end,
- .pix_fmts = (enum PixelFormat[]){PIX_FMT_PAL8, -1},
+ .pix_fmts = (const enum PixelFormat[]){PIX_FMT_PAL8, PIX_FMT_NONE},
+ .long_name = NULL_IF_CONFIG_SMALL("Zip Motion Blocks Video"),
};
-#endif
projects / ffmpeg / blobdiff