2006-12-08 04:37:00 +00:00
|
|
|
/*
|
|
|
|
* Zip Motion Blocks Video (ZMBV) encoder
|
|
|
|
* Copyright (c) 2006 Konstantin Shishkov
|
|
|
|
*
|
2011-03-18 17:35:10 +00:00
|
|
|
* This file is part of Libav.
|
2006-12-08 04:37:00 +00:00
|
|
|
*
|
2011-03-18 17:35:10 +00:00
|
|
|
* Libav is free software; you can redistribute it and/or
|
2006-12-08 04:37:00 +00:00
|
|
|
* 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.
|
|
|
|
*
|
2011-03-18 17:35:10 +00:00
|
|
|
* Libav is distributed in the hope that it will be useful,
|
2006-12-08 04:37:00 +00:00
|
|
|
* 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
|
2011-03-18 17:35:10 +00:00
|
|
|
* License along with Libav; if not, write to the Free Software
|
2006-12-08 04:37:00 +00:00
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
*/
|
|
|
|
|
|
|
|
/**
|
2010-04-20 14:45:34 +00:00
|
|
|
* @file
|
2006-12-08 04:37:00 +00:00
|
|
|
* Zip Motion Blocks Video encoder
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
|
2012-08-06 13:49:32 +00:00
|
|
|
#include "libavutil/common.h"
|
2009-01-11 22:19:48 +00:00
|
|
|
#include "libavutil/intreadwrite.h"
|
2006-12-08 04:37:00 +00:00
|
|
|
#include "avcodec.h"
|
2012-02-10 09:30:05 +00:00
|
|
|
#include "internal.h"
|
2006-12-08 04:37:00 +00:00
|
|
|
|
|
|
|
#include <zlib.h>
|
|
|
|
|
|
|
|
#define ZMBV_KEYFRAME 1
|
|
|
|
#define ZMBV_DELTAPAL 2
|
|
|
|
|
|
|
|
#define ZMBV_BLOCK 16
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Encoder context
|
|
|
|
*/
|
|
|
|
typedef struct ZmbvEncContext {
|
|
|
|
AVCodecContext *avctx;
|
|
|
|
AVFrame pic;
|
|
|
|
|
|
|
|
int range;
|
|
|
|
uint8_t *comp_buf, *work_buf;
|
|
|
|
uint8_t pal[768];
|
|
|
|
uint32_t pal2[256]; //for quick comparisons
|
|
|
|
uint8_t *prev;
|
|
|
|
int pstride;
|
|
|
|
int comp_size;
|
|
|
|
int keyint, curfrm;
|
|
|
|
z_stream zstream;
|
|
|
|
} ZmbvEncContext;
|
|
|
|
|
2008-05-09 09:02:41 +00:00
|
|
|
static int score_tab[256];
|
|
|
|
|
2006-12-08 04:37:00 +00:00
|
|
|
/** Block comparing function
|
|
|
|
* XXX should be optimized and moved to DSPContext
|
|
|
|
* TODO handle out of edge ME
|
|
|
|
*/
|
2009-11-20 07:26:17 +00:00
|
|
|
static inline int block_cmp(uint8_t *src, int stride, uint8_t *src2, int stride2,
|
|
|
|
int bw, int bh, int *xored)
|
2006-12-08 04:37:00 +00:00
|
|
|
{
|
|
|
|
int sum = 0;
|
|
|
|
int i, j;
|
2009-11-20 07:26:17 +00:00
|
|
|
uint8_t histogram[256] = {0};
|
2006-12-08 04:37:00 +00:00
|
|
|
|
2009-11-20 07:22:41 +00:00
|
|
|
*xored = 0;
|
2006-12-08 04:37:00 +00:00
|
|
|
for(j = 0; j < bh; j++){
|
2009-11-20 07:22:41 +00:00
|
|
|
for(i = 0; i < bw; i++){
|
|
|
|
int t = src[i] ^ src2[i];
|
|
|
|
histogram[t]++;
|
|
|
|
*xored |= t;
|
|
|
|
}
|
2006-12-08 04:37:00 +00:00
|
|
|
src += stride;
|
|
|
|
src2 += stride2;
|
|
|
|
}
|
2008-05-09 09:02:41 +00:00
|
|
|
|
2009-11-20 07:26:17 +00:00
|
|
|
for(i = 1; i < 256; i++)
|
|
|
|
sum += score_tab[histogram[i]];
|
2008-05-09 09:02:41 +00:00
|
|
|
|
2006-12-08 04:37:00 +00:00
|
|
|
return sum;
|
|
|
|
}
|
|
|
|
|
|
|
|
/** Motion estimation function
|
|
|
|
* TODO make better ME decisions
|
|
|
|
*/
|
2009-11-20 07:26:17 +00:00
|
|
|
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)
|
2006-12-08 04:37:00 +00:00
|
|
|
{
|
2007-03-11 09:51:01 +00:00
|
|
|
int dx, dy, tx, ty, tv, bv, bw, bh;
|
2006-12-08 04:37:00 +00:00
|
|
|
|
|
|
|
*mx = *my = 0;
|
2007-03-11 09:51:01 +00:00
|
|
|
bw = FFMIN(ZMBV_BLOCK, c->avctx->width - x);
|
|
|
|
bh = FFMIN(ZMBV_BLOCK, c->avctx->height - y);
|
2009-11-20 07:22:41 +00:00
|
|
|
bv = block_cmp(src, sstride, prev, pstride, bw, bh, xored);
|
2006-12-08 04:37:00 +00:00
|
|
|
if(!bv) return 0;
|
2007-03-11 09:51:01 +00:00
|
|
|
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++){
|
2006-12-08 04:37:00 +00:00
|
|
|
if(tx == x && ty == y) continue; // we already tested this block
|
|
|
|
dx = tx - x;
|
|
|
|
dy = ty - y;
|
2009-11-20 07:22:41 +00:00
|
|
|
tv = block_cmp(src, sstride, prev + dx + dy*pstride, pstride, bw, bh, xored);
|
2006-12-08 04:37:00 +00:00
|
|
|
if(tv < bv){
|
|
|
|
bv = tv;
|
|
|
|
*mx = dx;
|
|
|
|
*my = dy;
|
|
|
|
if(!bv) return 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return bv;
|
|
|
|
}
|
|
|
|
|
2012-02-10 09:30:05 +00:00
|
|
|
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
|
|
|
|
const AVFrame *pict, int *got_packet)
|
2006-12-08 04:37:00 +00:00
|
|
|
{
|
2007-04-08 20:24:16 +00:00
|
|
|
ZmbvEncContext * const c = avctx->priv_data;
|
2006-12-08 04:37:00 +00:00
|
|
|
AVFrame * const p = &c->pic;
|
2012-02-10 09:30:05 +00:00
|
|
|
uint8_t *src, *prev, *buf;
|
2006-12-08 04:37:00 +00:00
|
|
|
uint32_t *palptr;
|
|
|
|
int keyframe, chpal;
|
|
|
|
int fl;
|
2012-02-10 09:30:05 +00:00
|
|
|
int work_size = 0, pkt_size;
|
2006-12-08 04:37:00 +00:00
|
|
|
int bw, bh;
|
2012-02-10 09:30:05 +00:00
|
|
|
int i, j, ret;
|
2006-12-08 04:37:00 +00:00
|
|
|
|
|
|
|
keyframe = !c->curfrm;
|
2006-12-08 05:28:00 +00:00
|
|
|
c->curfrm++;
|
2006-12-08 04:37:00 +00:00
|
|
|
if(c->curfrm == c->keyint)
|
|
|
|
c->curfrm = 0;
|
|
|
|
*p = *pict;
|
2011-04-29 16:53:57 +00:00
|
|
|
p->pict_type= keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
|
2006-12-08 04:37:00 +00:00
|
|
|
p->key_frame= keyframe;
|
|
|
|
chpal = !keyframe && memcmp(p->data[1], c->pal2, 1024);
|
|
|
|
|
|
|
|
palptr = (uint32_t*)p->data[1];
|
|
|
|
src = p->data[0];
|
|
|
|
prev = c->prev;
|
|
|
|
if(chpal){
|
|
|
|
uint8_t tpal[3];
|
|
|
|
for(i = 0; i < 256; i++){
|
2007-06-02 01:41:07 +00:00
|
|
|
AV_WB24(tpal, palptr[i]);
|
2006-12-08 04:37:00 +00:00
|
|
|
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];
|
|
|
|
c->pal[i * 3 + 0] = tpal[0];
|
|
|
|
c->pal[i * 3 + 1] = tpal[1];
|
|
|
|
c->pal[i * 3 + 2] = tpal[2];
|
|
|
|
}
|
|
|
|
memcpy(c->pal2, p->data[1], 1024);
|
|
|
|
}
|
|
|
|
if(keyframe){
|
|
|
|
for(i = 0; i < 256; i++){
|
2007-06-02 01:41:07 +00:00
|
|
|
AV_WB24(c->pal+(i*3), palptr[i]);
|
2006-12-08 04:37:00 +00:00
|
|
|
}
|
|
|
|
memcpy(c->work_buf, c->pal, 768);
|
|
|
|
memcpy(c->pal2, p->data[1], 1024);
|
|
|
|
work_size = 768;
|
|
|
|
for(i = 0; i < avctx->height; i++){
|
|
|
|
memcpy(c->work_buf + work_size, src, avctx->width);
|
|
|
|
src += p->linesize[0];
|
|
|
|
work_size += avctx->width;
|
|
|
|
}
|
|
|
|
}else{
|
2009-11-20 07:22:41 +00:00
|
|
|
int x, y, bh2, bw2, xored;
|
2006-12-08 04:37:00 +00:00
|
|
|
uint8_t *tsrc, *tprev;
|
|
|
|
uint8_t *mv;
|
2011-06-01 16:26:27 +00:00
|
|
|
int mx, my;
|
2006-12-08 04:37:00 +00:00
|
|
|
|
|
|
|
bw = (avctx->width + ZMBV_BLOCK - 1) / ZMBV_BLOCK;
|
|
|
|
bh = (avctx->height + ZMBV_BLOCK - 1) / ZMBV_BLOCK;
|
|
|
|
mv = c->work_buf + work_size;
|
|
|
|
memset(c->work_buf + work_size, 0, (bw * bh * 2 + 3) & ~3);
|
|
|
|
work_size += (bw * bh * 2 + 3) & ~3;
|
|
|
|
/* for now just XOR'ing */
|
|
|
|
for(y = 0; y < avctx->height; y += ZMBV_BLOCK) {
|
|
|
|
bh2 = FFMIN(avctx->height - y, ZMBV_BLOCK);
|
|
|
|
for(x = 0; x < avctx->width; x += ZMBV_BLOCK, mv += 2) {
|
|
|
|
bw2 = FFMIN(avctx->width - x, ZMBV_BLOCK);
|
|
|
|
|
|
|
|
tsrc = src + x;
|
|
|
|
tprev = prev + x;
|
|
|
|
|
2011-06-01 16:26:27 +00:00
|
|
|
zmbv_me(c, tsrc, p->linesize[0], tprev, c->pstride, x, y, &mx, &my, &xored);
|
2009-11-20 07:22:41 +00:00
|
|
|
mv[0] = (mx << 1) | !!xored;
|
2006-12-08 04:37:00 +00:00
|
|
|
mv[1] = my << 1;
|
|
|
|
tprev += mx + my * c->pstride;
|
2009-11-20 07:22:41 +00:00
|
|
|
if(xored){
|
2006-12-08 04:37:00 +00:00
|
|
|
for(j = 0; j < bh2; j++){
|
|
|
|
for(i = 0; i < bw2; i++)
|
|
|
|
c->work_buf[work_size++] = tsrc[i] ^ tprev[i];
|
|
|
|
tsrc += p->linesize[0];
|
|
|
|
tprev += c->pstride;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
src += p->linesize[0] * ZMBV_BLOCK;
|
|
|
|
prev += c->pstride * ZMBV_BLOCK;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* save the previous frame */
|
|
|
|
src = p->data[0];
|
|
|
|
prev = c->prev;
|
|
|
|
for(i = 0; i < avctx->height; i++){
|
|
|
|
memcpy(prev, src, avctx->width);
|
|
|
|
prev += c->pstride;
|
|
|
|
src += p->linesize[0];
|
|
|
|
}
|
|
|
|
|
2012-02-19 10:16:16 +00:00
|
|
|
if (keyframe)
|
|
|
|
deflateReset(&c->zstream);
|
|
|
|
|
2006-12-08 04:37:00 +00:00
|
|
|
c->zstream.next_in = c->work_buf;
|
|
|
|
c->zstream.avail_in = work_size;
|
|
|
|
c->zstream.total_in = 0;
|
|
|
|
|
|
|
|
c->zstream.next_out = c->comp_buf;
|
|
|
|
c->zstream.avail_out = c->comp_size;
|
|
|
|
c->zstream.total_out = 0;
|
2009-05-10 14:44:09 +00:00
|
|
|
if(deflate(&c->zstream, Z_SYNC_FLUSH) != Z_OK){
|
2006-12-08 04:37:00 +00:00
|
|
|
av_log(avctx, AV_LOG_ERROR, "Error compressing data\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2012-02-10 09:30:05 +00:00
|
|
|
pkt_size = c->zstream.total_out + 1 + 6*keyframe;
|
|
|
|
if ((ret = ff_alloc_packet(pkt, pkt_size)) < 0) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Error getting packet of size %d.\n", pkt_size);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
buf = pkt->data;
|
|
|
|
|
2012-02-19 10:16:16 +00:00
|
|
|
fl = (keyframe ? ZMBV_KEYFRAME : 0) | (chpal ? ZMBV_DELTAPAL : 0);
|
2012-02-10 09:30:05 +00:00
|
|
|
*buf++ = fl;
|
2012-02-19 10:16:16 +00:00
|
|
|
if (keyframe) {
|
2012-02-10 09:30:05 +00:00
|
|
|
*buf++ = 0; // hi ver
|
|
|
|
*buf++ = 1; // lo ver
|
|
|
|
*buf++ = 1; // comp
|
|
|
|
*buf++ = 4; // format - 8bpp
|
|
|
|
*buf++ = ZMBV_BLOCK; // block width
|
|
|
|
*buf++ = ZMBV_BLOCK; // block height
|
2012-02-19 10:16:16 +00:00
|
|
|
}
|
2006-12-08 04:37:00 +00:00
|
|
|
memcpy(buf, c->comp_buf, c->zstream.total_out);
|
2012-02-10 09:30:05 +00:00
|
|
|
|
|
|
|
pkt->flags |= AV_PKT_FLAG_KEY*keyframe;
|
|
|
|
*got_packet = 1;
|
|
|
|
|
|
|
|
return 0;
|
2006-12-08 04:37:00 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Init zmbv encoder
|
|
|
|
*/
|
2008-03-21 03:11:20 +00:00
|
|
|
static av_cold int encode_init(AVCodecContext *avctx)
|
2006-12-08 04:37:00 +00:00
|
|
|
{
|
2007-04-08 20:24:16 +00:00
|
|
|
ZmbvEncContext * const c = avctx->priv_data;
|
2006-12-08 04:37:00 +00:00
|
|
|
int zret; // Zlib return code
|
2008-05-09 09:02:41 +00:00
|
|
|
int i;
|
2006-12-08 04:37:00 +00:00
|
|
|
int lvl = 9;
|
|
|
|
|
2008-05-09 09:02:41 +00:00
|
|
|
for(i=1; i<256; i++)
|
2008-05-16 21:28:55 +00:00
|
|
|
score_tab[i]= -i * log(i/(double)(ZMBV_BLOCK*ZMBV_BLOCK)) * (256/M_LN2);
|
2008-05-09 09:02:41 +00:00
|
|
|
|
2006-12-08 04:37:00 +00:00
|
|
|
c->avctx = avctx;
|
|
|
|
|
|
|
|
c->curfrm = 0;
|
|
|
|
c->keyint = avctx->keyint_min;
|
|
|
|
c->range = 8;
|
|
|
|
if(avctx->me_range > 0)
|
|
|
|
c->range = FFMIN(avctx->me_range, 127);
|
|
|
|
|
|
|
|
if(avctx->compression_level >= 0)
|
|
|
|
lvl = avctx->compression_level;
|
|
|
|
if(lvl < 0 || lvl > 9){
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Compression level should be 0-9, not %i\n", lvl);
|
2012-01-31 23:59:10 +00:00
|
|
|
return AVERROR(EINVAL);
|
2006-12-08 04:37:00 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// Needed if zlib unused or init aborted before deflateInit
|
2012-01-07 18:07:42 +00:00
|
|
|
memset(&c->zstream, 0, sizeof(z_stream));
|
2006-12-08 04:37:00 +00:00
|
|
|
c->comp_size = avctx->width * avctx->height + 1024 +
|
|
|
|
((avctx->width + ZMBV_BLOCK - 1) / ZMBV_BLOCK) * ((avctx->height + ZMBV_BLOCK - 1) / ZMBV_BLOCK) * 2 + 4;
|
|
|
|
if ((c->work_buf = av_malloc(c->comp_size)) == NULL) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Can't allocate work buffer.\n");
|
2012-01-31 23:59:10 +00:00
|
|
|
return AVERROR(ENOMEM);
|
2006-12-08 04:37:00 +00:00
|
|
|
}
|
|
|
|
/* Conservative upper bound taken from zlib v1.2.1 source via lcl.c */
|
|
|
|
c->comp_size = c->comp_size + ((c->comp_size + 7) >> 3) +
|
|
|
|
((c->comp_size + 63) >> 6) + 11;
|
|
|
|
|
|
|
|
/* Allocate compression buffer */
|
|
|
|
if ((c->comp_buf = av_malloc(c->comp_size)) == NULL) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Can't allocate compression buffer.\n");
|
2012-01-31 23:59:10 +00:00
|
|
|
return AVERROR(ENOMEM);
|
2006-12-08 04:37:00 +00:00
|
|
|
}
|
2009-05-22 21:32:13 +00:00
|
|
|
c->pstride = FFALIGN(avctx->width, 16);
|
2006-12-08 04:37:00 +00:00
|
|
|
if ((c->prev = av_malloc(c->pstride * avctx->height)) == NULL) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Can't allocate picture.\n");
|
2012-01-31 23:59:10 +00:00
|
|
|
return AVERROR(ENOMEM);
|
2006-12-08 04:37:00 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
c->zstream.zalloc = Z_NULL;
|
|
|
|
c->zstream.zfree = Z_NULL;
|
|
|
|
c->zstream.opaque = Z_NULL;
|
2012-01-07 18:07:42 +00:00
|
|
|
zret = deflateInit(&c->zstream, lvl);
|
2006-12-08 04:37:00 +00:00
|
|
|
if (zret != Z_OK) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2012-02-27 07:51:20 +00:00
|
|
|
avctx->coded_frame = &c->pic;
|
2008-09-18 13:17:44 +00:00
|
|
|
|
2006-12-08 04:37:00 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
2007-01-21 12:27:53 +00:00
|
|
|
* Uninit zmbv encoder
|
2006-12-08 04:37:00 +00:00
|
|
|
*/
|
2008-03-21 03:11:20 +00:00
|
|
|
static av_cold int encode_end(AVCodecContext *avctx)
|
2006-12-08 04:37:00 +00:00
|
|
|
{
|
2007-04-08 20:24:16 +00:00
|
|
|
ZmbvEncContext * const c = avctx->priv_data;
|
2006-12-08 04:37:00 +00:00
|
|
|
|
|
|
|
av_freep(&c->comp_buf);
|
|
|
|
av_freep(&c->work_buf);
|
|
|
|
|
2012-01-07 18:07:42 +00:00
|
|
|
deflateEnd(&c->zstream);
|
2006-12-08 04:37:00 +00:00
|
|
|
av_freep(&c->prev);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-01-25 21:40:11 +00:00
|
|
|
AVCodec ff_zmbv_encoder = {
|
2011-07-17 10:54:31 +00:00
|
|
|
.name = "zmbv",
|
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
2012-08-05 09:11:04 +00:00
|
|
|
.id = AV_CODEC_ID_ZMBV,
|
2011-07-17 10:54:31 +00:00
|
|
|
.priv_data_size = sizeof(ZmbvEncContext),
|
|
|
|
.init = encode_init,
|
2012-02-10 09:30:05 +00:00
|
|
|
.encode2 = encode_frame,
|
2011-07-17 10:54:31 +00:00
|
|
|
.close = encode_end,
|
2012-04-06 16:19:39 +00:00
|
|
|
.pix_fmts = (const enum PixelFormat[]){ PIX_FMT_PAL8, PIX_FMT_NONE },
|
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("Zip Motion Blocks Video"),
|
2006-12-08 04:37:00 +00:00
|
|
|
};
|