2
* Zip Motion Blocks Video (ZMBV) decoder
3
* Copyright (c) 2006 Konstantin Shishkov
5
* This file is part of FFmpeg.
7
* FFmpeg is free software; you can redistribute it and/or
8
* modify it under the terms of the GNU Lesser General Public
9
* License as published by the Free Software Foundation; either
10
* version 2.1 of the License, or (at your option) any later version.
12
* FFmpeg is distributed in the hope that it will be useful,
13
* but WITHOUT ANY WARRANTY; without even the implied warranty of
14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15
* Lesser General Public License for more details.
17
* You should have received a copy of the GNU Lesser General Public
18
* License along with FFmpeg; if not, write to the Free Software
19
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24
* Zip Motion Blocks Video decoder
30
#include "libavutil/intreadwrite.h"
35
#define ZMBV_KEYFRAME 1
36
#define ZMBV_DELTAPAL 2
53
typedef struct ZmbvContext {
54
AVCodecContext *avctx;
58
unsigned int decomp_size;
69
int (*decode_intra)(struct ZmbvContext *c);
70
int (*decode_xor)(struct ZmbvContext *c);
74
* Decode XOR'ed frame - 8bpp version
77
static int zmbv_decode_xor_8(ZmbvContext *c)
79
uint8_t *src = c->decomp_buf;
80
uint8_t *output, *prev;
83
int d, dx, dy, bw2, bh2;
91
if(c->flags & ZMBV_DELTAPAL){
92
for(i = 0; i < 768; i++)
97
src += ((c->bx * c->by * 2 + 3) & ~3);
100
for(y = 0; y < c->height; y += c->bh) {
101
bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
102
for(x = 0; x < c->width; x += c->bw) {
103
uint8_t *out, *tprev;
106
dx = mvec[block] >> 1;
107
dy = mvec[block + 1] >> 1;
110
bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
112
/* copy block - motion vectors out of bounds are used to zero blocks */
114
tprev = prev + x + dx + dy * c->width;
117
for(j = 0; j < bh2; j++){
118
if((my + j < 0) || (my + j >= c->height)) {
121
for(i = 0; i < bw2; i++){
122
if((mx + i < 0) || (mx + i >= c->width))
132
if(d) { /* apply XOR'ed difference */
134
for(j = 0; j < bh2; j++){
135
for(i = 0; i < bw2; i++)
141
output += c->width * c->bh;
142
prev += c->width * c->bh;
144
if(src - c->decomp_buf != c->decomp_len)
145
av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n", src-c->decomp_buf, c->decomp_len);
150
* Decode XOR'ed frame - 15bpp and 16bpp version
153
static int zmbv_decode_xor_16(ZmbvContext *c)
155
uint8_t *src = c->decomp_buf;
156
uint16_t *output, *prev;
159
int d, dx, dy, bw2, bh2;
164
output = (uint16_t*)c->cur;
165
prev = (uint16_t*)c->prev;
168
src += ((c->bx * c->by * 2 + 3) & ~3);
171
for(y = 0; y < c->height; y += c->bh) {
172
bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
173
for(x = 0; x < c->width; x += c->bw) {
174
uint16_t *out, *tprev;
177
dx = mvec[block] >> 1;
178
dy = mvec[block + 1] >> 1;
181
bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
183
/* copy block - motion vectors out of bounds are used to zero blocks */
185
tprev = prev + x + dx + dy * c->width;
188
for(j = 0; j < bh2; j++){
189
if((my + j < 0) || (my + j >= c->height)) {
190
memset(out, 0, bw2 * 2);
192
for(i = 0; i < bw2; i++){
193
if((mx + i < 0) || (mx + i >= c->width))
203
if(d) { /* apply XOR'ed difference */
205
for(j = 0; j < bh2; j++){
206
for(i = 0; i < bw2; i++) {
207
out[i] ^= *((uint16_t*)src);
214
output += c->width * c->bh;
215
prev += c->width * c->bh;
217
if(src - c->decomp_buf != c->decomp_len)
218
av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n", src-c->decomp_buf, c->decomp_len);
222
#ifdef ZMBV_ENABLE_24BPP
224
* Decode XOR'ed frame - 24bpp version
227
static int zmbv_decode_xor_24(ZmbvContext *c)
229
uint8_t *src = c->decomp_buf;
230
uint8_t *output, *prev;
233
int d, dx, dy, bw2, bh2;
242
stride = c->width * 3;
244
src += ((c->bx * c->by * 2 + 3) & ~3);
247
for(y = 0; y < c->height; y += c->bh) {
248
bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
249
for(x = 0; x < c->width; x += c->bw) {
250
uint8_t *out, *tprev;
253
dx = mvec[block] >> 1;
254
dy = mvec[block + 1] >> 1;
257
bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
259
/* copy block - motion vectors out of bounds are used to zero blocks */
260
out = output + x * 3;
261
tprev = prev + (x + dx) * 3 + dy * stride;
264
for(j = 0; j < bh2; j++){
265
if((my + j < 0) || (my + j >= c->height)) {
266
memset(out, 0, bw2 * 3);
268
for(i = 0; i < bw2; i++){
269
if((mx + i < 0) || (mx + i >= c->width)) {
274
out[i * 3 + 0] = tprev[i * 3 + 0];
275
out[i * 3 + 1] = tprev[i * 3 + 1];
276
out[i * 3 + 2] = tprev[i * 3 + 2];
284
if(d) { /* apply XOR'ed difference */
285
out = output + x * 3;
286
for(j = 0; j < bh2; j++){
287
for(i = 0; i < bw2; i++) {
288
out[i * 3 + 0] ^= *src++;
289
out[i * 3 + 1] ^= *src++;
290
out[i * 3 + 2] ^= *src++;
296
output += stride * c->bh;
297
prev += stride * c->bh;
299
if(src - c->decomp_buf != c->decomp_len)
300
av_log(c->avctx, AV_LOG_ERROR, "Used %i of %i bytes\n", src-c->decomp_buf, c->decomp_len);
303
#endif //ZMBV_ENABLE_24BPP
306
* Decode XOR'ed frame - 32bpp version
309
static int zmbv_decode_xor_32(ZmbvContext *c)
311
uint8_t *src = c->decomp_buf;
312
uint32_t *output, *prev;
315
int d, dx, dy, bw2, bh2;
320
output = (uint32_t*)c->cur;
321
prev = (uint32_t*)c->prev;
324
src += ((c->bx * c->by * 2 + 3) & ~3);
327
for(y = 0; y < c->height; y += c->bh) {
328
bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
329
for(x = 0; x < c->width; x += c->bw) {
330
uint32_t *out, *tprev;
333
dx = mvec[block] >> 1;
334
dy = mvec[block + 1] >> 1;
337
bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
339
/* copy block - motion vectors out of bounds are used to zero blocks */
341
tprev = prev + x + dx + dy * c->width;
344
for(j = 0; j < bh2; j++){
345
if((my + j < 0) || (my + j >= c->height)) {
346
memset(out, 0, bw2 * 4);
348
for(i = 0; i < bw2; i++){
349
if((mx + i < 0) || (mx + i >= c->width))
359
if(d) { /* apply XOR'ed difference */
361
for(j = 0; j < bh2; j++){
362
for(i = 0; i < bw2; i++) {
363
out[i] ^= *((uint32_t*)src);
370
output += c->width * c->bh;
371
prev += c->width * c->bh;
373
if(src - c->decomp_buf != c->decomp_len)
374
av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n", src-c->decomp_buf, c->decomp_len);
381
static int zmbv_decode_intra(ZmbvContext *c)
383
uint8_t *src = c->decomp_buf;
385
/* make the palette available on the way out */
386
if (c->fmt == ZMBV_FMT_8BPP) {
387
memcpy(c->pal, src, 768);
391
memcpy(c->cur, src, c->width * c->height * (c->bpp / 8));
395
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
397
const uint8_t *buf = avpkt->data;
398
int buf_size = avpkt->size;
399
ZmbvContext * const c = avctx->priv_data;
401
int zret = Z_OK; // Zlib return code
406
avctx->release_buffer(avctx, &c->pic);
408
c->pic.reference = 1;
409
c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
410
if(avctx->get_buffer(avctx, &c->pic) < 0){
411
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
415
outptr = c->pic.data[0]; // Output image pointer
420
if(c->flags & ZMBV_KEYFRAME) {
430
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);
431
if(hi_ver != 0 || lo_ver != 1) {
432
av_log(avctx, AV_LOG_ERROR, "Unsupported version %i.%i\n", hi_ver, lo_ver);
435
if(c->bw == 0 || c->bh == 0) {
436
av_log(avctx, AV_LOG_ERROR, "Unsupported block size %ix%i\n", c->bw, c->bh);
439
if(c->comp != 0 && c->comp != 1) {
440
av_log(avctx, AV_LOG_ERROR, "Unsupported compression type %i\n", c->comp);
447
c->decode_intra = zmbv_decode_intra;
448
c->decode_xor = zmbv_decode_xor_8;
453
c->decode_intra = zmbv_decode_intra;
454
c->decode_xor = zmbv_decode_xor_16;
456
#ifdef ZMBV_ENABLE_24BPP
459
c->decode_intra = zmbv_decode_intra;
460
c->decode_xor = zmbv_decode_xor_24;
462
#endif //ZMBV_ENABLE_24BPP
465
c->decode_intra = zmbv_decode_intra;
466
c->decode_xor = zmbv_decode_xor_32;
469
c->decode_intra = NULL;
470
c->decode_xor = NULL;
471
av_log(avctx, AV_LOG_ERROR, "Unsupported (for now) format %i\n", c->fmt);
475
zret = inflateReset(&c->zstream);
477
av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
481
c->cur = av_realloc(c->cur, avctx->width * avctx->height * (c->bpp / 8));
482
c->prev = av_realloc(c->prev, avctx->width * avctx->height * (c->bpp / 8));
483
c->bx = (c->width + c->bw - 1) / c->bw;
484
c->by = (c->height+ c->bh - 1) / c->bh;
487
if(c->decode_intra == NULL) {
488
av_log(avctx, AV_LOG_ERROR, "Error! Got no format or no keyframe!\n");
492
if(c->comp == 0) { //Uncompressed data
493
memcpy(c->decomp_buf, buf, len);
495
} else { // ZLIB-compressed data
496
c->zstream.total_in = c->zstream.total_out = 0;
497
c->zstream.next_in = buf;
498
c->zstream.avail_in = len;
499
c->zstream.next_out = c->decomp_buf;
500
c->zstream.avail_out = c->decomp_size;
501
inflate(&c->zstream, Z_FINISH);
502
c->decomp_len = c->zstream.total_out;
504
if(c->flags & ZMBV_KEYFRAME) {
505
c->pic.key_frame = 1;
506
c->pic.pict_type = FF_I_TYPE;
509
c->pic.key_frame = 0;
510
c->pic.pict_type = FF_P_TYPE;
520
out = c->pic.data[0];
524
for(j = 0; j < c->height; j++) {
525
for(i = 0; i < c->width; i++) {
526
out[i * 3 + 0] = c->pal[(*src) * 3 + 0];
527
out[i * 3 + 1] = c->pal[(*src) * 3 + 1];
528
out[i * 3 + 2] = c->pal[(*src) * 3 + 2];
531
out += c->pic.linesize[0];
535
for(j = 0; j < c->height; j++) {
536
for(i = 0; i < c->width; i++) {
537
uint16_t tmp = AV_RL16(src);
539
out[i * 3 + 0] = (tmp & 0x7C00) >> 7;
540
out[i * 3 + 1] = (tmp & 0x03E0) >> 2;
541
out[i * 3 + 2] = (tmp & 0x001F) << 3;
543
out += c->pic.linesize[0];
547
for(j = 0; j < c->height; j++) {
548
for(i = 0; i < c->width; i++) {
549
uint16_t tmp = AV_RL16(src);
551
out[i * 3 + 0] = (tmp & 0xF800) >> 8;
552
out[i * 3 + 1] = (tmp & 0x07E0) >> 3;
553
out[i * 3 + 2] = (tmp & 0x001F) << 3;
555
out += c->pic.linesize[0];
558
#ifdef ZMBV_ENABLE_24BPP
560
for(j = 0; j < c->height; j++) {
561
memcpy(out, src, c->width * 3);
563
out += c->pic.linesize[0];
566
#endif //ZMBV_ENABLE_24BPP
568
for(j = 0; j < c->height; j++) {
569
for(i = 0; i < c->width; i++) {
570
uint32_t tmp = AV_RL32(src);
572
AV_WB24(out+(i*3), tmp);
574
out += c->pic.linesize[0];
578
av_log(avctx, AV_LOG_ERROR, "Cannot handle format %i\n", c->fmt);
580
memcpy(c->prev, c->cur, c->width * c->height * (c->bpp / 8));
582
*data_size = sizeof(AVFrame);
583
*(AVFrame*)data = c->pic;
585
/* always report that the buffer was completely consumed */
596
static av_cold int decode_init(AVCodecContext *avctx)
598
ZmbvContext * const c = avctx->priv_data;
599
int zret; // Zlib return code
603
c->width = avctx->width;
604
c->height = avctx->height;
606
c->bpp = avctx->bits_per_coded_sample;
608
// Needed if zlib unused or init aborted before inflateInit
609
memset(&(c->zstream), 0, sizeof(z_stream));
611
avctx->pix_fmt = PIX_FMT_RGB24;
612
c->decomp_size = (avctx->width + 255) * 4 * (avctx->height + 64);
614
/* Allocate decompression buffer */
615
if (c->decomp_size) {
616
if ((c->decomp_buf = av_malloc(c->decomp_size)) == NULL) {
617
av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
622
c->zstream.zalloc = Z_NULL;
623
c->zstream.zfree = Z_NULL;
624
c->zstream.opaque = Z_NULL;
625
zret = inflateInit(&(c->zstream));
627
av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
638
* Uninit zmbv decoder
641
static av_cold int decode_end(AVCodecContext *avctx)
643
ZmbvContext * const c = avctx->priv_data;
645
av_freep(&c->decomp_buf);
648
avctx->release_buffer(avctx, &c->pic);
649
inflateEnd(&(c->zstream));
656
AVCodec zmbv_decoder = {
666
.long_name = NULL_IF_CONFIG_SMALL("Zip Motion Blocks Video"),