yading@10: /*
yading@10:  * Zip Motion Blocks Video (ZMBV) decoder
yading@10:  * Copyright (c) 2006 Konstantin Shishkov
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * Zip Motion Blocks Video decoder
yading@10:  */
yading@10: 
yading@10: #include <stdio.h>
yading@10: #include <stdlib.h>
yading@10: 
yading@10: #include "libavutil/common.h"
yading@10: #include "libavutil/intreadwrite.h"
yading@10: #include "avcodec.h"
yading@10: #include "internal.h"
yading@10: 
yading@10: #include <zlib.h>
yading@10: 
yading@10: #define ZMBV_KEYFRAME 1
yading@10: #define ZMBV_DELTAPAL 2
yading@10: 
yading@10: enum ZmbvFormat {
yading@10:     ZMBV_FMT_NONE  = 0,
yading@10:     ZMBV_FMT_1BPP  = 1,
yading@10:     ZMBV_FMT_2BPP  = 2,
yading@10:     ZMBV_FMT_4BPP  = 3,
yading@10:     ZMBV_FMT_8BPP  = 4,
yading@10:     ZMBV_FMT_15BPP = 5,
yading@10:     ZMBV_FMT_16BPP = 6,
yading@10:     ZMBV_FMT_24BPP = 7,
yading@10:     ZMBV_FMT_32BPP = 8
yading@10: };
yading@10: 
yading@10: /*
yading@10:  * Decoder context
yading@10:  */
yading@10: typedef struct ZmbvContext {
yading@10:     AVCodecContext *avctx;
yading@10: 
yading@10:     int bpp;
yading@10:     unsigned int decomp_size;
yading@10:     uint8_t* decomp_buf;
yading@10:     uint8_t pal[768];
yading@10:     uint8_t *prev, *cur;
yading@10:     int width, height;
yading@10:     int fmt;
yading@10:     int comp;
yading@10:     int flags;
yading@10:     int stride;
yading@10:     int bw, bh, bx, by;
yading@10:     int decomp_len;
yading@10:     z_stream zstream;
yading@10:     int (*decode_intra)(struct ZmbvContext *c);
yading@10:     int (*decode_xor)(struct ZmbvContext *c);
yading@10: } ZmbvContext;
yading@10: 
yading@10: /**
yading@10:  * Decode XOR'ed frame - 8bpp version
yading@10:  */
yading@10: 
yading@10: static int zmbv_decode_xor_8(ZmbvContext *c)
yading@10: {
yading@10:     uint8_t *src = c->decomp_buf;
yading@10:     uint8_t *output, *prev;
yading@10:     int8_t *mvec;
yading@10:     int x, y;
yading@10:     int d, dx, dy, bw2, bh2;
yading@10:     int block;
yading@10:     int i, j;
yading@10:     int mx, my;
yading@10: 
yading@10:     output = c->cur;
yading@10:     prev = c->prev;
yading@10: 
yading@10:     if (c->flags & ZMBV_DELTAPAL) {
yading@10:         for (i = 0; i < 768; i++)
yading@10:             c->pal[i] ^= *src++;
yading@10:     }
yading@10: 
yading@10:     mvec = (int8_t*)src;
yading@10:     src += ((c->bx * c->by * 2 + 3) & ~3);
yading@10: 
yading@10:     block = 0;
yading@10:     for (y = 0; y < c->height; y += c->bh) {
yading@10:         bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
yading@10:         for (x = 0; x < c->width; x += c->bw) {
yading@10:             uint8_t *out, *tprev;
yading@10: 
yading@10:             d = mvec[block] & 1;
yading@10:             dx = mvec[block] >> 1;
yading@10:             dy = mvec[block + 1] >> 1;
yading@10:             block += 2;
yading@10: 
yading@10:             bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
yading@10: 
yading@10:             /* copy block - motion vectors out of bounds are used to zero blocks */
yading@10:             out = output + x;
yading@10:             tprev = prev + x + dx + dy * c->width;
yading@10:             mx = x + dx;
yading@10:             my = y + dy;
yading@10:             for (j = 0; j < bh2; j++) {
yading@10:                 if (my + j < 0 || my + j >= c->height) {
yading@10:                     memset(out, 0, bw2);
yading@10:                 } else {
yading@10:                     for (i = 0; i < bw2; i++) {
yading@10:                         if (mx + i < 0 || mx + i >= c->width)
yading@10:                             out[i] = 0;
yading@10:                         else
yading@10:                             out[i] = tprev[i];
yading@10:                     }
yading@10:                 }
yading@10:                 out += c->width;
yading@10:                 tprev += c->width;
yading@10:             }
yading@10: 
yading@10:             if (d) { /* apply XOR'ed difference */
yading@10:                 out = output + x;
yading@10:                 for (j = 0; j < bh2; j++) {
yading@10:                     for (i = 0; i < bw2; i++)
yading@10:                         out[i] ^= *src++;
yading@10:                     out += c->width;
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:         output += c->width * c->bh;
yading@10:         prev += c->width * c->bh;
yading@10:     }
yading@10:     if (src - c->decomp_buf != c->decomp_len)
yading@10:         av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n",
yading@10:                src-c->decomp_buf, c->decomp_len);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * Decode XOR'ed frame - 15bpp and 16bpp version
yading@10:  */
yading@10: 
yading@10: static int zmbv_decode_xor_16(ZmbvContext *c)
yading@10: {
yading@10:     uint8_t *src = c->decomp_buf;
yading@10:     uint16_t *output, *prev;
yading@10:     int8_t *mvec;
yading@10:     int x, y;
yading@10:     int d, dx, dy, bw2, bh2;
yading@10:     int block;
yading@10:     int i, j;
yading@10:     int mx, my;
yading@10: 
yading@10:     output = (uint16_t*)c->cur;
yading@10:     prev = (uint16_t*)c->prev;
yading@10: 
yading@10:     mvec = (int8_t*)src;
yading@10:     src += ((c->bx * c->by * 2 + 3) & ~3);
yading@10: 
yading@10:     block = 0;
yading@10:     for (y = 0; y < c->height; y += c->bh) {
yading@10:         bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
yading@10:         for (x = 0; x < c->width; x += c->bw) {
yading@10:             uint16_t *out, *tprev;
yading@10: 
yading@10:             d = mvec[block] & 1;
yading@10:             dx = mvec[block] >> 1;
yading@10:             dy = mvec[block + 1] >> 1;
yading@10:             block += 2;
yading@10: 
yading@10:             bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
yading@10: 
yading@10:             /* copy block - motion vectors out of bounds are used to zero blocks */
yading@10:             out = output + x;
yading@10:             tprev = prev + x + dx + dy * c->width;
yading@10:             mx = x + dx;
yading@10:             my = y + dy;
yading@10:             for (j = 0; j < bh2; j++) {
yading@10:                 if (my + j < 0 || my + j >= c->height) {
yading@10:                     memset(out, 0, bw2 * 2);
yading@10:                 } else {
yading@10:                     for (i = 0; i < bw2; i++) {
yading@10:                         if (mx + i < 0 || mx + i >= c->width)
yading@10:                             out[i] = 0;
yading@10:                         else
yading@10:                             out[i] = tprev[i];
yading@10:                     }
yading@10:                 }
yading@10:                 out += c->width;
yading@10:                 tprev += c->width;
yading@10:             }
yading@10: 
yading@10:             if (d) { /* apply XOR'ed difference */
yading@10:                 out = output + x;
yading@10:                 for (j = 0; j < bh2; j++){
yading@10:                     for (i = 0; i < bw2; i++) {
yading@10:                         out[i] ^= *((uint16_t*)src);
yading@10:                         src += 2;
yading@10:                     }
yading@10:                     out += c->width;
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:         output += c->width * c->bh;
yading@10:         prev += c->width * c->bh;
yading@10:     }
yading@10:     if (src - c->decomp_buf != c->decomp_len)
yading@10:         av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n",
yading@10:                src-c->decomp_buf, c->decomp_len);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: #ifdef ZMBV_ENABLE_24BPP
yading@10: /**
yading@10:  * Decode XOR'ed frame - 24bpp version
yading@10:  */
yading@10: 
yading@10: static int zmbv_decode_xor_24(ZmbvContext *c)
yading@10: {
yading@10:     uint8_t *src = c->decomp_buf;
yading@10:     uint8_t *output, *prev;
yading@10:     int8_t *mvec;
yading@10:     int x, y;
yading@10:     int d, dx, dy, bw2, bh2;
yading@10:     int block;
yading@10:     int i, j;
yading@10:     int mx, my;
yading@10:     int stride;
yading@10: 
yading@10:     output = c->cur;
yading@10:     prev = c->prev;
yading@10: 
yading@10:     stride = c->width * 3;
yading@10:     mvec = (int8_t*)src;
yading@10:     src += ((c->bx * c->by * 2 + 3) & ~3);
yading@10: 
yading@10:     block = 0;
yading@10:     for (y = 0; y < c->height; y += c->bh) {
yading@10:         bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
yading@10:         for (x = 0; x < c->width; x += c->bw) {
yading@10:             uint8_t *out, *tprev;
yading@10: 
yading@10:             d = mvec[block] & 1;
yading@10:             dx = mvec[block] >> 1;
yading@10:             dy = mvec[block + 1] >> 1;
yading@10:             block += 2;
yading@10: 
yading@10:             bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
yading@10: 
yading@10:             /* copy block - motion vectors out of bounds are used to zero blocks */
yading@10:             out = output + x * 3;
yading@10:             tprev = prev + (x + dx) * 3 + dy * stride;
yading@10:             mx = x + dx;
yading@10:             my = y + dy;
yading@10:             for (j = 0; j < bh2; j++) {
yading@10:                 if (my + j < 0 || my + j >= c->height) {
yading@10:                     memset(out, 0, bw2 * 3);
yading@10:                 } else {
yading@10:                     for (i = 0; i < bw2; i++){
yading@10:                         if (mx + i < 0 || mx + i >= c->width) {
yading@10:                             out[i * 3 + 0] = 0;
yading@10:                             out[i * 3 + 1] = 0;
yading@10:                             out[i * 3 + 2] = 0;
yading@10:                         } else {
yading@10:                             out[i * 3 + 0] = tprev[i * 3 + 0];
yading@10:                             out[i * 3 + 1] = tprev[i * 3 + 1];
yading@10:                             out[i * 3 + 2] = tprev[i * 3 + 2];
yading@10:                         }
yading@10:                     }
yading@10:                 }
yading@10:                 out += stride;
yading@10:                 tprev += stride;
yading@10:             }
yading@10: 
yading@10:             if (d) { /* apply XOR'ed difference */
yading@10:                 out = output + x * 3;
yading@10:                 for (j = 0; j < bh2; j++) {
yading@10:                     for (i = 0; i < bw2; i++) {
yading@10:                         out[i * 3 + 0] ^= *src++;
yading@10:                         out[i * 3 + 1] ^= *src++;
yading@10:                         out[i * 3 + 2] ^= *src++;
yading@10:                     }
yading@10:                     out += stride;
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:         output += stride * c->bh;
yading@10:         prev += stride * c->bh;
yading@10:     }
yading@10:     if (src - c->decomp_buf != c->decomp_len)
yading@10:         av_log(c->avctx, AV_LOG_ERROR, "Used %i of %i bytes\n",
yading@10:                src-c->decomp_buf, c->decomp_len);
yading@10:     return 0;
yading@10: }
yading@10: #endif //ZMBV_ENABLE_24BPP
yading@10: 
yading@10: /**
yading@10:  * Decode XOR'ed frame - 32bpp version
yading@10:  */
yading@10: 
yading@10: static int zmbv_decode_xor_32(ZmbvContext *c)
yading@10: {
yading@10:     uint8_t *src = c->decomp_buf;
yading@10:     uint32_t *output, *prev;
yading@10:     int8_t *mvec;
yading@10:     int x, y;
yading@10:     int d, dx, dy, bw2, bh2;
yading@10:     int block;
yading@10:     int i, j;
yading@10:     int mx, my;
yading@10: 
yading@10:     output = (uint32_t*)c->cur;
yading@10:     prev = (uint32_t*)c->prev;
yading@10: 
yading@10:     mvec = (int8_t*)src;
yading@10:     src += ((c->bx * c->by * 2 + 3) & ~3);
yading@10: 
yading@10:     block = 0;
yading@10:     for (y = 0; y < c->height; y += c->bh) {
yading@10:         bh2 = ((c->height - y) > c->bh) ? c->bh : (c->height - y);
yading@10:         for (x = 0; x < c->width; x += c->bw) {
yading@10:             uint32_t *out, *tprev;
yading@10: 
yading@10:             d = mvec[block] & 1;
yading@10:             dx = mvec[block] >> 1;
yading@10:             dy = mvec[block + 1] >> 1;
yading@10:             block += 2;
yading@10: 
yading@10:             bw2 = ((c->width - x) > c->bw) ? c->bw : (c->width - x);
yading@10: 
yading@10:             /* copy block - motion vectors out of bounds are used to zero blocks */
yading@10:             out = output + x;
yading@10:             tprev = prev + x + dx + dy * c->width;
yading@10:             mx = x + dx;
yading@10:             my = y + dy;
yading@10:             for (j = 0; j < bh2; j++) {
yading@10:                 if (my + j < 0 || my + j >= c->height) {
yading@10:                     memset(out, 0, bw2 * 4);
yading@10:                 } else {
yading@10:                     for (i = 0; i < bw2; i++){
yading@10:                         if (mx + i < 0 || mx + i >= c->width)
yading@10:                             out[i] = 0;
yading@10:                         else
yading@10:                             out[i] = tprev[i];
yading@10:                     }
yading@10:                 }
yading@10:                 out += c->width;
yading@10:                 tprev += c->width;
yading@10:             }
yading@10: 
yading@10:             if (d) { /* apply XOR'ed difference */
yading@10:                 out = output + x;
yading@10:                 for (j = 0; j < bh2; j++){
yading@10:                     for (i = 0; i < bw2; i++) {
yading@10:                         out[i] ^= *((uint32_t *) src);
yading@10:                         src += 4;
yading@10:                     }
yading@10:                     out += c->width;
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:         output += c->width * c->bh;
yading@10:         prev   += c->width * c->bh;
yading@10:     }
yading@10:     if (src - c->decomp_buf != c->decomp_len)
yading@10:         av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n",
yading@10:                src-c->decomp_buf, c->decomp_len);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * Decode intraframe
yading@10:  */
yading@10: static int zmbv_decode_intra(ZmbvContext *c)
yading@10: {
yading@10:     uint8_t *src = c->decomp_buf;
yading@10: 
yading@10:     /* make the palette available on the way out */
yading@10:     if (c->fmt == ZMBV_FMT_8BPP) {
yading@10:         memcpy(c->pal, src, 768);
yading@10:         src += 768;
yading@10:     }
yading@10: 
yading@10:     memcpy(c->cur, src, c->width * c->height * (c->bpp / 8));
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
yading@10: {
yading@10:     AVFrame *frame = data;
yading@10:     const uint8_t *buf = avpkt->data;
yading@10:     int buf_size = avpkt->size;
yading@10:     ZmbvContext * const c = avctx->priv_data;
yading@10:     int zret = Z_OK; // Zlib return code
yading@10:     int len = buf_size;
yading@10:     int hi_ver, lo_ver, ret;
yading@10: 
yading@10:     /* parse header */
yading@10:     c->flags = buf[0];
yading@10:     buf++; len--;
yading@10:     if (c->flags & ZMBV_KEYFRAME) {
yading@10:         void *decode_intra = NULL;
yading@10:         c->decode_intra= NULL;
yading@10:         hi_ver = buf[0];
yading@10:         lo_ver = buf[1];
yading@10:         c->comp = buf[2];
yading@10:         c->fmt = buf[3];
yading@10:         c->bw = buf[4];
yading@10:         c->bh = buf[5];
yading@10:         c->decode_intra = NULL;
yading@10:         c->decode_xor = NULL;
yading@10: 
yading@10:         buf += 6;
yading@10:         len -= 6;
yading@10:         av_log(avctx, AV_LOG_DEBUG,
yading@10:                "Flags=%X ver=%i.%i comp=%i fmt=%i blk=%ix%i\n",
yading@10:                c->flags,hi_ver,lo_ver,c->comp,c->fmt,c->bw,c->bh);
yading@10:         if (hi_ver != 0 || lo_ver != 1) {
yading@10:             avpriv_request_sample(avctx, "Version %i.%i", hi_ver, lo_ver);
yading@10:             return AVERROR_PATCHWELCOME;
yading@10:         }
yading@10:         if (c->bw == 0 || c->bh == 0) {
yading@10:             avpriv_request_sample(avctx, "Block size %ix%i", c->bw, c->bh);
yading@10:             return AVERROR_PATCHWELCOME;
yading@10:         }
yading@10:         if (c->comp != 0 && c->comp != 1) {
yading@10:             avpriv_request_sample(avctx, "Compression type %i", c->comp);
yading@10:             return AVERROR_PATCHWELCOME;
yading@10:         }
yading@10: 
yading@10:         switch (c->fmt) {
yading@10:         case ZMBV_FMT_8BPP:
yading@10:             c->bpp = 8;
yading@10:             decode_intra = zmbv_decode_intra;
yading@10:             c->decode_xor = zmbv_decode_xor_8;
yading@10:             avctx->pix_fmt = AV_PIX_FMT_PAL8;
yading@10:             c->stride = c->width;
yading@10:             break;
yading@10:         case ZMBV_FMT_15BPP:
yading@10:         case ZMBV_FMT_16BPP:
yading@10:             c->bpp = 16;
yading@10:             decode_intra = zmbv_decode_intra;
yading@10:             c->decode_xor = zmbv_decode_xor_16;
yading@10:             if (c->fmt == ZMBV_FMT_15BPP)
yading@10:                 avctx->pix_fmt = AV_PIX_FMT_RGB555LE;
yading@10:             else
yading@10:                 avctx->pix_fmt = AV_PIX_FMT_RGB565LE;
yading@10:             c->stride = c->width * 2;
yading@10:             break;
yading@10: #ifdef ZMBV_ENABLE_24BPP
yading@10:         case ZMBV_FMT_24BPP:
yading@10:             c->bpp = 24;
yading@10:             decode_intra = zmbv_decode_intra;
yading@10:             c->decode_xor = zmbv_decode_xor_24;
yading@10:             avctx->pix_fmt = AV_PIX_FMT_RGB24;
yading@10:             c->stride = c->width * 3;
yading@10:             break;
yading@10: #endif //ZMBV_ENABLE_24BPP
yading@10:         case ZMBV_FMT_32BPP:
yading@10:             c->bpp = 32;
yading@10:             decode_intra = zmbv_decode_intra;
yading@10:             c->decode_xor = zmbv_decode_xor_32;
yading@10:             avctx->pix_fmt = AV_PIX_FMT_BGR0;
yading@10:             c->stride = c->width * 4;
yading@10:             break;
yading@10:         default:
yading@10:             c->decode_xor = NULL;
yading@10:             avpriv_request_sample(avctx, "Format %i", c->fmt);
yading@10:             return AVERROR_PATCHWELCOME;
yading@10:         }
yading@10: 
yading@10:         zret = inflateReset(&c->zstream);
yading@10:         if (zret != Z_OK) {
yading@10:             av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
yading@10:             return AVERROR_UNKNOWN;
yading@10:         }
yading@10: 
yading@10:         c->cur  = av_realloc_f(c->cur, avctx->width * avctx->height,  (c->bpp / 8));
yading@10:         c->prev = av_realloc_f(c->prev, avctx->width * avctx->height,  (c->bpp / 8));
yading@10:         c->bx = (c->width + c->bw - 1) / c->bw;
yading@10:         c->by = (c->height+ c->bh - 1) / c->bh;
yading@10:         if (!c->cur || !c->prev)
yading@10:             return -1;
yading@10:         memset(c->cur, 0, avctx->width * avctx->height * (c->bpp / 8));
yading@10:         memset(c->prev, 0, avctx->width * avctx->height * (c->bpp / 8));
yading@10:         c->decode_intra= decode_intra;
yading@10:     }
yading@10: 
yading@10:     if (c->decode_intra == NULL) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Error! Got no format or no keyframe!\n");
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10: 
yading@10:     if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     if (c->comp == 0) { //Uncompressed data
yading@10:         if (c->decomp_size < len) {
yading@10:             av_log(avctx, AV_LOG_ERROR, "decomp buffer too small\n");
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         }
yading@10:         memcpy(c->decomp_buf, buf, len);
yading@10:     } else { // ZLIB-compressed data
yading@10:         c->zstream.total_in = c->zstream.total_out = 0;
yading@10:         c->zstream.next_in = (uint8_t*)buf;
yading@10:         c->zstream.avail_in = len;
yading@10:         c->zstream.next_out = c->decomp_buf;
yading@10:         c->zstream.avail_out = c->decomp_size;
yading@10:         zret = inflate(&c->zstream, Z_SYNC_FLUSH);
yading@10:         if (zret != Z_OK && zret != Z_STREAM_END) {
yading@10:             av_log(avctx, AV_LOG_ERROR, "inflate error %d\n", zret);
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         }
yading@10:         c->decomp_len = c->zstream.total_out;
yading@10:     }
yading@10:     if (c->flags & ZMBV_KEYFRAME) {
yading@10:         frame->key_frame = 1;
yading@10:         frame->pict_type = AV_PICTURE_TYPE_I;
yading@10:         c->decode_intra(c);
yading@10:     } else {
yading@10:         frame->key_frame = 0;
yading@10:         frame->pict_type = AV_PICTURE_TYPE_P;
yading@10:         if (c->decomp_len)
yading@10:             c->decode_xor(c);
yading@10:     }
yading@10: 
yading@10:     /* update frames */
yading@10:     {
yading@10:         uint8_t *out, *src;
yading@10:         int j;
yading@10: 
yading@10:         out = frame->data[0];
yading@10:         src = c->cur;
yading@10:         switch (c->fmt) {
yading@10:         case ZMBV_FMT_8BPP:
yading@10:             for (j = 0; j < 256; j++)
yading@10:                 AV_WN32(&frame->data[1][j * 4], 0xFFU << 24 | AV_RB24(&c->pal[j * 3]));
yading@10:         case ZMBV_FMT_15BPP:
yading@10:         case ZMBV_FMT_16BPP:
yading@10: #ifdef ZMBV_ENABLE_24BPP
yading@10:         case ZMBV_FMT_24BPP:
yading@10: #endif
yading@10:         case ZMBV_FMT_32BPP:
yading@10:             for (j = 0; j < c->height; j++) {
yading@10:                 memcpy(out, src, c->stride);
yading@10:                 src += c->stride;
yading@10:                 out += frame->linesize[0];
yading@10:             }
yading@10:             break;
yading@10:         default:
yading@10:             av_log(avctx, AV_LOG_ERROR, "Cannot handle format %i\n", c->fmt);
yading@10:         }
yading@10:         FFSWAP(uint8_t *, c->cur, c->prev);
yading@10:     }
yading@10:     *got_frame = 1;
yading@10: 
yading@10:     /* always report that the buffer was completely consumed */
yading@10:     return buf_size;
yading@10: }
yading@10: 
yading@10: static av_cold int decode_init(AVCodecContext *avctx)
yading@10: {
yading@10:     ZmbvContext * const c = avctx->priv_data;
yading@10:     int zret; // Zlib return code
yading@10: 
yading@10:     c->avctx = avctx;
yading@10: 
yading@10:     c->width = avctx->width;
yading@10:     c->height = avctx->height;
yading@10: 
yading@10:     c->bpp = avctx->bits_per_coded_sample;
yading@10: 
yading@10:     // Needed if zlib unused or init aborted before inflateInit
yading@10:     memset(&c->zstream, 0, sizeof(z_stream));
yading@10: 
yading@10:     c->decomp_size = (avctx->width + 255) * 4 * (avctx->height + 64);
yading@10: 
yading@10:     /* Allocate decompression buffer */
yading@10:     if (c->decomp_size) {
yading@10:         if ((c->decomp_buf = av_mallocz(c->decomp_size)) == NULL) {
yading@10:             av_log(avctx, AV_LOG_ERROR,
yading@10:                    "Can't allocate decompression buffer.\n");
yading@10:             return AVERROR(ENOMEM);
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     c->zstream.zalloc = Z_NULL;
yading@10:     c->zstream.zfree = Z_NULL;
yading@10:     c->zstream.opaque = Z_NULL;
yading@10:     zret = inflateInit(&c->zstream);
yading@10:     if (zret != Z_OK) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
yading@10:         return AVERROR_UNKNOWN;
yading@10:     }
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_cold int decode_end(AVCodecContext *avctx)
yading@10: {
yading@10:     ZmbvContext * const c = avctx->priv_data;
yading@10: 
yading@10:     av_freep(&c->decomp_buf);
yading@10: 
yading@10:     inflateEnd(&c->zstream);
yading@10:     av_freep(&c->cur);
yading@10:     av_freep(&c->prev);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: AVCodec ff_zmbv_decoder = {
yading@10:     .name           = "zmbv",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_ZMBV,
yading@10:     .priv_data_size = sizeof(ZmbvContext),
yading@10:     .init           = decode_init,
yading@10:     .close          = decode_end,
yading@10:     .decode         = decode_frame,
yading@10:     .capabilities   = CODEC_CAP_DR1,
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("Zip Motion Blocks Video"),
yading@10: };