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Update avcodec to 20080825

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27554 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
David McPaul 2008-09-15 14:07:34 +00:00
parent 0978528eb1
commit 25074f9ff3
2 changed files with 1001 additions and 0 deletions
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667
src/add-ons/media/plugins/avcodec/libavcodec/zmbv.c Normal file
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/*
* Zip Motion Blocks Video (ZMBV) decoder
* Copyright (c) 2006 Konstantin Shishkov
*
* This file is part of FFmpeg.
*
* FFmpeg 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,
* 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
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file zmbv.c
* Zip Motion Blocks Video decoder
*/
#include <stdio.h>
#include <stdlib.h>
#include "avcodec.h"
#include <zlib.h>
#define ZMBV_KEYFRAME 1
#define ZMBV_DELTAPAL 2
enum ZmbvFormat {
ZMBV_FMT_NONE = 0,
ZMBV_FMT_1BPP = 1,
ZMBV_FMT_2BPP = 2,
ZMBV_FMT_4BPP = 3,
ZMBV_FMT_8BPP = 4,
ZMBV_FMT_15BPP = 5,
ZMBV_FMT_16BPP = 6,
ZMBV_FMT_24BPP = 7,
ZMBV_FMT_32BPP = 8
};
/*
* Decoder context
*/
typedef struct ZmbvContext {
AVCodecContext *avctx;
AVFrame pic;
int bpp;
unsigned int decomp_size;
uint8_t* decomp_buf;
uint8_t pal[768];
uint8_t *prev, *cur;
int width, height;
int fmt;
int comp;
int flags;
int bw, bh, bx, by;
int decomp_len;
z_stream zstream;
int (*decode_intra)(struct ZmbvContext *c);
int (*decode_xor)(struct ZmbvContext *c);
} ZmbvContext;
/**
* Decode XOR'ed frame - 8bpp version
*/
static int zmbv_decode_xor_8(ZmbvContext *c)
{
uint8_t *src = c->decomp_buf;
uint8_t *output, *prev;
int8_t *mvec;
int x, y;
int d, dx, dy, bw2, bh2;
int block;
int i, j;
int mx, my;
output = c->cur;
prev = c->prev;
if(c->flags & ZMBV_DELTAPAL){
for(i = 0; i < 768; i++)
c->pal[i] ^= *src++;
}
mvec = (int8_t*)src;
src += ((c->bx * c->by * 2 + 3) & ~3);
block = 0;
for(y = 0; y < c->height; y += c->bh) {
bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
for(x = 0; x < c->width; x += c->bw) {
uint8_t *out, *tprev;
d = mvec[block] & 1;
dx = mvec[block] >> 1;
dy = mvec[block + 1] >> 1;
block += 2;
bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
/* copy block - motion vectors out of bounds are used to zero blocks */
out = output + x;
tprev = prev + x + dx + dy * c->width;
mx = x + dx;
my = y + dy;
for(j = 0; j < bh2; j++){
if((my + j < 0) || (my + j >= c->height)) {
memset(out, 0, bw2);
} else {
for(i = 0; i < bw2; i++){
if((mx + i < 0) || (mx + i >= c->width))
out[i] = 0;
else
out[i] = tprev[i];
}
}
out += c->width;
tprev += c->width;
}
if(d) { /* apply XOR'ed difference */
out = output + x;
for(j = 0; j < bh2; j++){
for(i = 0; i < bw2; i++)
out[i] ^= *src++;
out += c->width;
}
}
}
output += c->width * c->bh;
prev += c->width * c->bh;
}
if(src - c->decomp_buf != c->decomp_len)
av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n", src-c->decomp_buf, c->decomp_len);
return 0;
}
/**
* Decode XOR'ed frame - 15bpp and 16bpp version
*/
static int zmbv_decode_xor_16(ZmbvContext *c)
{
uint8_t *src = c->decomp_buf;
uint16_t *output, *prev;
int8_t *mvec;
int x, y;
int d, dx, dy, bw2, bh2;
int block;
int i, j;
int mx, my;
output = (uint16_t*)c->cur;
prev = (uint16_t*)c->prev;
mvec = (int8_t*)src;
src += ((c->bx * c->by * 2 + 3) & ~3);
block = 0;
for(y = 0; y < c->height; y += c->bh) {
bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
for(x = 0; x < c->width; x += c->bw) {
uint16_t *out, *tprev;
d = mvec[block] & 1;
dx = mvec[block] >> 1;
dy = mvec[block + 1] >> 1;
block += 2;
bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
/* copy block - motion vectors out of bounds are used to zero blocks */
out = output + x;
tprev = prev + x + dx + dy * c->width;
mx = x + dx;
my = y + dy;
for(j = 0; j < bh2; j++){
if((my + j < 0) || (my + j >= c->height)) {
memset(out, 0, bw2 * 2);
} else {
for(i = 0; i < bw2; i++){
if((mx + i < 0) || (mx + i >= c->width))
out[i] = 0;
else
out[i] = tprev[i];
}
}
out += c->width;
tprev += c->width;
}
if(d) { /* apply XOR'ed difference */
out = output + x;
for(j = 0; j < bh2; j++){
for(i = 0; i < bw2; i++) {
out[i] ^= *((uint16_t*)src);
src += 2;
}
out += c->width;
}
}
}
output += c->width * c->bh;
prev += c->width * c->bh;
}
if(src - c->decomp_buf != c->decomp_len)
av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n", src-c->decomp_buf, c->decomp_len);
return 0;
}
#ifdef ZMBV_ENABLE_24BPP
/**
* Decode XOR'ed frame - 24bpp version
*/
static int zmbv_decode_xor_24(ZmbvContext *c)
{
uint8_t *src = c->decomp_buf;
uint8_t *output, *prev;
int8_t *mvec;
int x, y;
int d, dx, dy, bw2, bh2;
int block;
int i, j;
int mx, my;
int stride;
output = c->cur;
prev = c->prev;
stride = c->width * 3;
mvec = (int8_t*)src;
src += ((c->bx * c->by * 2 + 3) & ~3);
block = 0;
for(y = 0; y < c->height; y += c->bh) {
bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
for(x = 0; x < c->width; x += c->bw) {
uint8_t *out, *tprev;
d = mvec[block] & 1;
dx = mvec[block] >> 1;
dy = mvec[block + 1] >> 1;
block += 2;
bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
/* copy block - motion vectors out of bounds are used to zero blocks */
out = output + x * 3;
tprev = prev + (x + dx) * 3 + dy * stride;
mx = x + dx;
my = y + dy;
for(j = 0; j < bh2; j++){
if((my + j < 0) || (my + j >= c->height)) {
memset(out, 0, bw2 * 3);
} else {
for(i = 0; i < bw2; i++){
if((mx + i < 0) || (mx + i >= c->width)) {
out[i * 3 + 0] = 0;
out[i * 3 + 1] = 0;
out[i * 3 + 2] = 0;
} else {
out[i * 3 + 0] = tprev[i * 3 + 0];
out[i * 3 + 1] = tprev[i * 3 + 1];
out[i * 3 + 2] = tprev[i * 3 + 2];
}
}
}
out += stride;
tprev += stride;
}
if(d) { /* apply XOR'ed difference */
out = output + x * 3;
for(j = 0; j < bh2; j++){
for(i = 0; i < bw2; i++) {
out[i * 3 + 0] ^= *src++;
out[i * 3 + 1] ^= *src++;
out[i * 3 + 2] ^= *src++;
}
out += stride;
}
}
}
output += stride * c->bh;
prev += stride * c->bh;
}
if(src - c->decomp_buf != c->decomp_len)
av_log(c->avctx, AV_LOG_ERROR, "Used %i of %i bytes\n", src-c->decomp_buf, c->decomp_len);
return 0;
}
#endif //ZMBV_ENABLE_24BPP
/**
* Decode XOR'ed frame - 32bpp version
*/
static int zmbv_decode_xor_32(ZmbvContext *c)
{
uint8_t *src = c->decomp_buf;
uint32_t *output, *prev;
int8_t *mvec;
int x, y;
int d, dx, dy, bw2, bh2;
int block;
int i, j;
int mx, my;
output = (uint32_t*)c->cur;
prev = (uint32_t*)c->prev;
mvec = (int8_t*)src;
src += ((c->bx * c->by * 2 + 3) & ~3);
block = 0;
for(y = 0; y < c->height; y += c->bh) {
bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
for(x = 0; x < c->width; x += c->bw) {
uint32_t *out, *tprev;
d = mvec[block] & 1;
dx = mvec[block] >> 1;
dy = mvec[block + 1] >> 1;
block += 2;
bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
/* copy block - motion vectors out of bounds are used to zero blocks */
out = output + x;
tprev = prev + x + dx + dy * c->width;
mx = x + dx;
my = y + dy;
for(j = 0; j < bh2; j++){
if((my + j < 0) || (my + j >= c->height)) {
memset(out, 0, bw2 * 4);
} else {
for(i = 0; i < bw2; i++){
if((mx + i < 0) || (mx + i >= c->width))
out[i] = 0;
else
out[i] = tprev[i];
}
}
out += c->width;
tprev += c->width;
}
if(d) { /* apply XOR'ed difference */
out = output + x;
for(j = 0; j < bh2; j++){
for(i = 0; i < bw2; i++) {
out[i] ^= *((uint32_t*)src);
src += 4;
}
out += c->width;
}
}
}
output += c->width * c->bh;
prev += c->width * c->bh;
}
if(src - c->decomp_buf != c->decomp_len)
av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n", src-c->decomp_buf, c->decomp_len);
return 0;
}
/**
* Decode intraframe
*/
static int zmbv_decode_intra(ZmbvContext *c)
{
uint8_t *src = c->decomp_buf;
/* make the palette available on the way out */
if (c->fmt == ZMBV_FMT_8BPP) {
memcpy(c->pal, src, 768);
src += 768;
}
memcpy(c->cur, src, c->width * c->height * (c->bpp / 8));
return 0;
}
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size)
{
ZmbvContext * const c = avctx->priv_data;
uint8_t *outptr;
int zret = Z_OK; // Zlib return code
int len = buf_size;
int hi_ver, lo_ver;
if(c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
c->pic.reference = 1;
c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
if(avctx->get_buffer(avctx, &c->pic) < 0){
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
outptr = c->pic.data[0]; // Output image pointer
/* parse header */
c->flags = buf[0];
buf++; len--;
if(c->flags & ZMBV_KEYFRAME) {
hi_ver = buf[0];
lo_ver = buf[1];
c->comp = buf[2];
c->fmt = buf[3];
c->bw = buf[4];
c->bh = buf[5];
buf += 6;
len -= 6;
av_log(avctx, AV_LOG_DEBUG, "Flags=%X ver=%i.%i comp=%i fmt=%i blk=%ix%i\n",c->flags,hi_ver,lo_ver,c->comp,c->fmt,c->bw,c->bh);
if(hi_ver != 0 || lo_ver != 1) {
av_log(avctx, AV_LOG_ERROR, "Unsupported version %i.%i\n", hi_ver, lo_ver);
return -1;
}
if(c->bw == 0 || c->bh == 0) {
av_log(avctx, AV_LOG_ERROR, "Unsupported block size %ix%i\n", c->bw, c->bh);
}
if(c->comp != 0 && c->comp != 1) {
av_log(avctx, AV_LOG_ERROR, "Unsupported compression type %i\n", c->comp);
return -1;
}
switch(c->fmt) {
case ZMBV_FMT_8BPP:
c->bpp = 8;
c->decode_intra = zmbv_decode_intra;
c->decode_xor = zmbv_decode_xor_8;
break;
case ZMBV_FMT_15BPP:
case ZMBV_FMT_16BPP:
c->bpp = 16;
c->decode_intra = zmbv_decode_intra;
c->decode_xor = zmbv_decode_xor_16;
break;
#ifdef ZMBV_ENABLE_24BPP
case ZMBV_FMT_24BPP:
c->bpp = 24;
c->decode_intra = zmbv_decode_intra;
c->decode_xor = zmbv_decode_xor_24;
break;
#endif //ZMBV_ENABLE_24BPP
case ZMBV_FMT_32BPP:
c->bpp = 32;
c->decode_intra = zmbv_decode_intra;
c->decode_xor = zmbv_decode_xor_32;
break;
default:
c->decode_intra = NULL;
c->decode_xor = NULL;
av_log(avctx, AV_LOG_ERROR, "Unsupported (for now) format %i\n", c->fmt);
return -1;
}
zret = inflateReset(&c->zstream);
if (zret != Z_OK) {
av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
return -1;
}
c->cur = av_realloc(c->cur, avctx->width * avctx->height * (c->bpp / 8));
c->prev = av_realloc(c->prev, avctx->width * avctx->height * (c->bpp / 8));
c->bx = (c->width + c->bw - 1) / c->bw;
c->by = (c->height+ c->bh - 1) / c->bh;
}
if(c->decode_intra == NULL) {
av_log(avctx, AV_LOG_ERROR, "Error! Got no format or no keyframe!\n");
return -1;
}
if(c->comp == 0) { //Uncompressed data
memcpy(c->decomp_buf, buf, len);
c->decomp_size = 1;
} else { // ZLIB-compressed data
c->zstream.total_in = c->zstream.total_out = 0;
c->zstream.next_in = buf;
c->zstream.avail_in = len;
c->zstream.next_out = c->decomp_buf;
c->zstream.avail_out = c->decomp_size;
inflate(&c->zstream, Z_FINISH);
c->decomp_len = c->zstream.total_out;
}
if(c->flags & ZMBV_KEYFRAME) {
c->pic.key_frame = 1;
c->pic.pict_type = FF_I_TYPE;
c->decode_intra(c);
} else {
c->pic.key_frame = 0;
c->pic.pict_type = FF_P_TYPE;
if(c->decomp_len)
c->decode_xor(c);
}
/* update frames */
{
uint8_t *out, *src;
int i, j;
out = c->pic.data[0];
src = c->cur;
switch(c->fmt) {
case ZMBV_FMT_8BPP:
for(j = 0; j < c->height; j++) {
for(i = 0; i < c->width; i++) {
out[i * 3 + 0] = c->pal[(*src) * 3 + 0];
out[i * 3 + 1] = c->pal[(*src) * 3 + 1];
out[i * 3 + 2] = c->pal[(*src) * 3 + 2];
src++;
}
out += c->pic.linesize[0];
}
break;
case ZMBV_FMT_15BPP:
for(j = 0; j < c->height; j++) {
for(i = 0; i < c->width; i++) {
uint16_t tmp = AV_RL16(src);
src += 2;
out[i * 3 + 0] = (tmp & 0x7C00) >> 7;
out[i * 3 + 1] = (tmp & 0x03E0) >> 2;
out[i * 3 + 2] = (tmp & 0x001F) << 3;
}
out += c->pic.linesize[0];
}
break;
case ZMBV_FMT_16BPP:
for(j = 0; j < c->height; j++) {
for(i = 0; i < c->width; i++) {
uint16_t tmp = AV_RL16(src);
src += 2;
out[i * 3 + 0] = (tmp & 0xF800) >> 8;
out[i * 3 + 1] = (tmp & 0x07E0) >> 3;
out[i * 3 + 2] = (tmp & 0x001F) << 3;
}
out += c->pic.linesize[0];
}
break;
#ifdef ZMBV_ENABLE_24BPP
case ZMBV_FMT_24BPP:
for(j = 0; j < c->height; j++) {
memcpy(out, src, c->width * 3);
src += c->width * 3;
out += c->pic.linesize[0];
}
break;
#endif //ZMBV_ENABLE_24BPP
case ZMBV_FMT_32BPP:
for(j = 0; j < c->height; j++) {
for(i = 0; i < c->width; i++) {
uint32_t tmp = AV_RL32(src);
src += 4;
AV_WB24(out+(i*3), tmp);
}
out += c->pic.linesize[0];
}
break;
default:
av_log(avctx, AV_LOG_ERROR, "Cannot handle format %i\n", c->fmt);
}
memcpy(c->prev, c->cur, c->width * c->height * (c->bpp / 8));
}
*data_size = sizeof(AVFrame);
*(AVFrame*)data = c->pic;
/* always report that the buffer was completely consumed */
return buf_size;
}
/*
*
* Init zmbv decoder
*
*/
static av_cold int decode_init(AVCodecContext *avctx)
{
ZmbvContext * const c = avctx->priv_data;
int zret; // Zlib return code
c->avctx = avctx;
c->pic.data[0] = NULL;
c->width = avctx->width;
c->height = avctx->height;
if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
return 1;
}
c->bpp = avctx->bits_per_sample;
// Needed if zlib unused or init aborted before inflateInit
memset(&(c->zstream), 0, sizeof(z_stream));
avctx->pix_fmt = PIX_FMT_RGB24;
c->decomp_size = (avctx->width + 255) * 4 * (avctx->height + 64);
/* Allocate decompression buffer */
if (c->decomp_size) {
if ((c->decomp_buf = av_malloc(c->decomp_size)) == NULL) {
av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
return 1;
}
}
c->zstream.zalloc = Z_NULL;
c->zstream.zfree = Z_NULL;
c->zstream.opaque = Z_NULL;
zret = inflateInit(&(c->zstream));
if (zret != Z_OK) {
av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
return 1;
}
return 0;
}
/*
*
* Uninit zmbv decoder
*
*/
static av_cold int decode_end(AVCodecContext *avctx)
{
ZmbvContext * const c = avctx->priv_data;
av_freep(&c->decomp_buf);
if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
inflateEnd(&(c->zstream));
av_freep(&c->cur);
av_freep(&c->prev);
return 0;
}
AVCodec zmbv_decoder = {
"zmbv",
CODEC_TYPE_VIDEO,
CODEC_ID_ZMBV,
sizeof(ZmbvContext),
decode_init,
NULL,
decode_end,
decode_frame,
.long_name = NULL_IF_CONFIG_SMALL("Zip Motion Blocks Video"),
};

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src/add-ons/media/plugins/avcodec/libavcodec/zmbvenc.c Normal file
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/*
* Zip Motion Blocks Video (ZMBV) encoder
* Copyright (c) 2006 Konstantin Shishkov
*
* This file is part of FFmpeg.
*
* FFmpeg 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,
* 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
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file zmbvenc.c
* Zip Motion Blocks Video encoder
*/
#include <stdio.h>
#include <stdlib.h>
#include "avcodec.h"
#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;
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)
{
int sum = 0;
int i, j;
uint8_t histogram[256]={0};
for(j = 0; j < bh; j++){
for(i = 0; i < bw; i++)
histogram[src[i] ^ src2[i]]++;
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)
{
int dx, dy, tx, ty, tv, bv, bw, bh;
*mx = *my = 0;
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);
if(!bv) return 0;
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, bw, bh);
if(tv < bv){
bv = tv;
*mx = dx;
*my = dy;
if(!bv) return 0;
}
}
}
return bv;
}
static int encode_frame(AVCodecContext *avctx, uint8_t *buf, int buf_size, void *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;
int work_size = 0;
int bw, bh;
int i, j;
keyframe = !c->curfrm;
c->curfrm++;
if(c->curfrm == c->keyint)
c->curfrm = 0;
*p = *pict;
p->pict_type= keyframe ? FF_I_TYPE : FF_P_TYPE;
p->key_frame= keyframe;
chpal = !keyframe && memcmp(p->data[1], c->pal2, 1024);
fl = (keyframe ? ZMBV_KEYFRAME : 0) | (chpal ? ZMBV_DELTAPAL : 0);
*buf++ = fl; len++;
if(keyframe){
deflateReset(&c->zstream);
*buf++ = 0; len++; // hi ver
*buf++ = 1; len++; // lo ver
*buf++ = 1; len++; // comp
*buf++ = 4; len++; // format - 8bpp
*buf++ = ZMBV_BLOCK; len++; // block width
*buf++ = ZMBV_BLOCK; len++; // block height
}
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++){
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];
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++){
AV_WB24(c->pal+(i*3), palptr[i]);
}
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{
int x, y, bh2, bw2;
uint8_t *tsrc, *tprev;
uint8_t *mv;
int mx, my, bv;
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;
bv = zmbv_me(c, tsrc, p->linesize[0], tprev, c->pstride, x, y, &mx, &my);
mv[0] = (mx << 1) | !!bv;
mv[1] = my << 1;
tprev += mx + my * c->pstride;
if(bv){
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];
}
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;
if((zret = deflate(&c->zstream, Z_SYNC_FLUSH)) != Z_OK){
av_log(avctx, AV_LOG_ERROR, "Error compressing data\n");
return -1;
}
memcpy(buf, c->comp_buf, c->zstream.total_out);
return len + c->zstream.total_out;
}
/**
* Init zmbv encoder
*/
static av_cold int encode_init(AVCodecContext *avctx)
{
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;
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);
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 +
((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");
return -1;
}
/* 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");
return -1;
}
c->pstride = (avctx->width + 15) & ~15;
if ((c->prev = av_malloc(c->pstride * avctx->height)) == NULL) {
av_log(avctx, AV_LOG_ERROR, "Can't allocate picture.\n");
return -1;
}
c->zstream.zalloc = Z_NULL;
c->zstream.zfree = Z_NULL;
c->zstream.opaque = Z_NULL;
zret = deflateInit(&(c->zstream), lvl);
if (zret != Z_OK) {
av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
return -1;
}
return 0;
}
/**
* Uninit zmbv encoder
*/
static av_cold int encode_end(AVCodecContext *avctx)
{
ZmbvEncContext * const c = avctx->priv_data;
av_freep(&c->comp_buf);
av_freep(&c->work_buf);
deflateEnd(&(c->zstream));
av_freep(&c->prev);
return 0;
}
AVCodec zmbv_encoder = {
"zmbv",
CODEC_TYPE_VIDEO,
CODEC_ID_ZMBV,
sizeof(ZmbvEncContext),
encode_init,
encode_frame,
encode_end,
.pix_fmts = (enum PixelFormat[]){PIX_FMT_PAL8, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("Zip Motion Blocks Video"),
};