* Zip Motion Blocks Video (ZMBV) decoder
* Copyright (c) 2006 Konstantin Shishkov
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
*/
/**
#include <stdio.h>
#include <stdlib.h>
-#include "common.h"
+#include "libavutil/intreadwrite.h"
#include "avcodec.h"
-#ifdef CONFIG_ZLIB
#include <zlib.h>
-#endif
#define ZMBV_KEYFRAME 1
#define ZMBV_DELTAPAL 2
int flags;
int bw, bh, bx, by;
int decomp_len;
-#ifdef CONFIG_ZLIB
z_stream zstream;
-#endif
int (*decode_intra)(struct ZmbvContext *c);
int (*decode_xor)(struct ZmbvContext *c);
} ZmbvContext;
prev += c->width * 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);
+ 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
*/
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
return 0;
}
-static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
+static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size)
{
- ZmbvContext * const c = (ZmbvContext *)avctx->priv_data;
+ ZmbvContext * const c = avctx->priv_data;
uint8_t *outptr;
-#ifdef CONFIG_ZLIB
int zret = Z_OK; // Zlib return code
-#endif
int len = buf_size;
int hi_ver, lo_ver;
av_log(avctx, AV_LOG_ERROR, "Unsupported compression type %i\n", c->comp);
return -1;
}
- if(c->fmt != ZMBV_FMT_8BPP && c->fmt != ZMBV_FMT_24BPP) {
+
+ 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;
}
-#ifdef CONFIG_ZLIB
+
zret = inflateReset(&c->zstream);
if (zret != Z_OK) {
av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
return -1;
}
-#else
- av_log(avctx, AV_LOG_ERROR, "BUG! Zlib support not compiled in frame decoder.\n");
- return -1;
-#endif /* CONFIG_ZLIB */
- if(c->fmt == ZMBV_FMT_8BPP) {
- c->bpp = 8;
- c->decode_intra = zmbv_decode_intra;
- c->decode_xor = zmbv_decode_xor_8;
- } else {
- c->bpp = 24;
- c->decode_intra = zmbv_decode_intra;
- c->decode_xor = zmbv_decode_xor_24;
- }
+
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->fmt == 0) {
+ if(c->decode_intra == NULL) {
av_log(avctx, AV_LOG_ERROR, "Error! Got no format or no keyframe!\n");
return -1;
}
memcpy(c->decomp_buf, buf, len);
c->decomp_size = 1;
} else { // ZLIB-compressed data
-#ifdef CONFIG_ZLIB
c->zstream.total_in = c->zstream.total_out = 0;
c->zstream.next_in = buf;
c->zstream.avail_in = len;
c->zstream.avail_out = c->decomp_size;
inflate(&c->zstream, Z_FINISH);
c->decomp_len = c->zstream.total_out;
-#else
- av_log(avctx, AV_LOG_ERROR, "BUG! Zlib support not compiled in frame decoder.\n");
- return -1;
-#endif
}
if(c->flags & ZMBV_KEYFRAME) {
c->pic.key_frame = 1;
} else {
c->pic.key_frame = 0;
c->pic.pict_type = FF_P_TYPE;
- c->decode_xor(c);
+ if(c->decomp_len)
+ c->decode_xor(c);
}
/* update frames */
out = c->pic.data[0];
src = c->cur;
- 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++;
+ 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];
}
- 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);
+ memcpy(c->prev, c->cur, c->width * c->height * (c->bpp / 8));
}
*data_size = sizeof(AVFrame);
*(AVFrame*)data = c->pic;
* Init zmbv decoder
*
*/
-static int decode_init(AVCodecContext *avctx)
+static av_cold int decode_init(AVCodecContext *avctx)
{
- ZmbvContext * const c = (ZmbvContext *)avctx->priv_data;
+ ZmbvContext * const c = avctx->priv_data;
int zret; // Zlib return code
c->avctx = avctx;
- avctx->has_b_frames = 0;
c->pic.data[0] = NULL;
c->width = avctx->width;
c->height = avctx->height;
- if (avcodec_check_dimensions(avctx, avctx->height, avctx->width) < 0) {
+ if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
return 1;
}
- c->bpp = avctx->bits_per_sample;
+ c->bpp = avctx->bits_per_coded_sample;
-#ifdef CONFIG_ZLIB
// Needed if zlib unused or init aborted before inflateInit
memset(&(c->zstream), 0, sizeof(z_stream));
-#else
- av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
- return 1;
-#endif
+
avctx->pix_fmt = PIX_FMT_RGB24;
c->decomp_size = (avctx->width + 255) * 4 * (avctx->height + 64);
}
}
-#ifdef CONFIG_ZLIB
c->zstream.zalloc = Z_NULL;
c->zstream.zfree = Z_NULL;
c->zstream.opaque = Z_NULL;
av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
return 1;
}
-#endif
return 0;
}
* Uninit zmbv decoder
*
*/
-static int decode_end(AVCodecContext *avctx)
+static av_cold int decode_end(AVCodecContext *avctx)
{
- ZmbvContext * const c = (ZmbvContext *)avctx->priv_data;
+ ZmbvContext * const c = avctx->priv_data;
av_freep(&c->decomp_buf);
if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
-#ifdef CONFIG_ZLIB
inflateEnd(&(c->zstream));
-#endif
- if(c->cur)
- av_freep(&c->cur);
- if(c->prev)
- av_freep(&c->prev);
+ av_freep(&c->cur);
+ av_freep(&c->prev);
return 0;
}
decode_init,
NULL,
decode_end,
- decode_frame
+ decode_frame,
+ .long_name = NULL_IF_CONFIG_SMALL("Zip Motion Blocks Video"),
};