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Diffstat (limited to 'ffmpeg1/libavcodec/zmbv.c')
-rw-r--r--ffmpeg1/libavcodec/zmbv.c635
1 files changed, 635 insertions, 0 deletions
diff --git a/ffmpeg1/libavcodec/zmbv.c b/ffmpeg1/libavcodec/zmbv.c
new file mode 100644
index 0000000..7f3b326
--- /dev/null
+++ b/ffmpeg1/libavcodec/zmbv.c
@@ -0,0 +1,635 @@
+/*
+ * 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
+ * Zip Motion Blocks Video decoder
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "libavutil/common.h"
+#include "libavutil/intreadwrite.h"
+#include "avcodec.h"
+#include "internal.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;
+
+ 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 stride;
+ 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 *got_frame, AVPacket *avpkt)
+{
+ AVFrame *frame = data;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ ZmbvContext * const c = avctx->priv_data;
+ int zret = Z_OK; // Zlib return code
+ int len = buf_size;
+ int hi_ver, lo_ver, ret;
+
+ /* parse header */
+ c->flags = buf[0];
+ buf++; len--;
+ if (c->flags & ZMBV_KEYFRAME) {
+ void *decode_intra = NULL;
+ c->decode_intra= NULL;
+ hi_ver = buf[0];
+ lo_ver = buf[1];
+ c->comp = buf[2];
+ c->fmt = buf[3];
+ c->bw = buf[4];
+ c->bh = buf[5];
+ c->decode_intra = NULL;
+ c->decode_xor = NULL;
+
+ 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) {
+ avpriv_request_sample(avctx, "Version %i.%i", hi_ver, lo_ver);
+ return AVERROR_PATCHWELCOME;
+ }
+ if (c->bw == 0 || c->bh == 0) {
+ avpriv_request_sample(avctx, "Block size %ix%i", c->bw, c->bh);
+ return AVERROR_PATCHWELCOME;
+ }
+ if (c->comp != 0 && c->comp != 1) {
+ avpriv_request_sample(avctx, "Compression type %i", c->comp);
+ return AVERROR_PATCHWELCOME;
+ }
+
+ switch (c->fmt) {
+ case ZMBV_FMT_8BPP:
+ c->bpp = 8;
+ decode_intra = zmbv_decode_intra;
+ c->decode_xor = zmbv_decode_xor_8;
+ avctx->pix_fmt = AV_PIX_FMT_PAL8;
+ c->stride = c->width;
+ break;
+ case ZMBV_FMT_15BPP:
+ case ZMBV_FMT_16BPP:
+ c->bpp = 16;
+ decode_intra = zmbv_decode_intra;
+ c->decode_xor = zmbv_decode_xor_16;
+ if (c->fmt == ZMBV_FMT_15BPP)
+ avctx->pix_fmt = AV_PIX_FMT_RGB555LE;
+ else
+ avctx->pix_fmt = AV_PIX_FMT_RGB565LE;
+ c->stride = c->width * 2;
+ break;
+#ifdef ZMBV_ENABLE_24BPP
+ case ZMBV_FMT_24BPP:
+ c->bpp = 24;
+ decode_intra = zmbv_decode_intra;
+ c->decode_xor = zmbv_decode_xor_24;
+ avctx->pix_fmt = AV_PIX_FMT_RGB24;
+ c->stride = c->width * 3;
+ break;
+#endif //ZMBV_ENABLE_24BPP
+ case ZMBV_FMT_32BPP:
+ c->bpp = 32;
+ decode_intra = zmbv_decode_intra;
+ c->decode_xor = zmbv_decode_xor_32;
+ avctx->pix_fmt = AV_PIX_FMT_BGR0;
+ c->stride = c->width * 4;
+ break;
+ default:
+ c->decode_xor = NULL;
+ avpriv_request_sample(avctx, "Format %i", c->fmt);
+ return AVERROR_PATCHWELCOME;
+ }
+
+ zret = inflateReset(&c->zstream);
+ if (zret != Z_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
+ return AVERROR_UNKNOWN;
+ }
+
+ c->cur = av_realloc_f(c->cur, avctx->width * avctx->height, (c->bpp / 8));
+ c->prev = av_realloc_f(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->cur || !c->prev)
+ return -1;
+ memset(c->cur, 0, avctx->width * avctx->height * (c->bpp / 8));
+ memset(c->prev, 0, avctx->width * avctx->height * (c->bpp / 8));
+ c->decode_intra= decode_intra;
+ }
+
+ if (c->decode_intra == NULL) {
+ av_log(avctx, AV_LOG_ERROR, "Error! Got no format or no keyframe!\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
+ return ret;
+
+ if (c->comp == 0) { //Uncompressed data
+ if (c->decomp_size < len) {
+ av_log(avctx, AV_LOG_ERROR, "decomp buffer too small\n");
+ return AVERROR_INVALIDDATA;
+ }
+ memcpy(c->decomp_buf, buf, len);
+ } else { // ZLIB-compressed data
+ c->zstream.total_in = c->zstream.total_out = 0;
+ c->zstream.next_in = (uint8_t*)buf;
+ c->zstream.avail_in = len;
+ c->zstream.next_out = c->decomp_buf;
+ c->zstream.avail_out = c->decomp_size;
+ zret = inflate(&c->zstream, Z_SYNC_FLUSH);
+ if (zret != Z_OK && zret != Z_STREAM_END) {
+ av_log(avctx, AV_LOG_ERROR, "inflate error %d\n", zret);
+ return AVERROR_INVALIDDATA;
+ }
+ c->decomp_len = c->zstream.total_out;
+ }
+ if (c->flags & ZMBV_KEYFRAME) {
+ frame->key_frame = 1;
+ frame->pict_type = AV_PICTURE_TYPE_I;
+ c->decode_intra(c);
+ } else {
+ frame->key_frame = 0;
+ frame->pict_type = AV_PICTURE_TYPE_P;
+ if (c->decomp_len)
+ c->decode_xor(c);
+ }
+
+ /* update frames */
+ {
+ uint8_t *out, *src;
+ int j;
+
+ out = frame->data[0];
+ src = c->cur;
+ switch (c->fmt) {
+ case ZMBV_FMT_8BPP:
+ for (j = 0; j < 256; j++)
+ AV_WN32(&frame->data[1][j * 4], 0xFFU << 24 | AV_RB24(&c->pal[j * 3]));
+ case ZMBV_FMT_15BPP:
+ case ZMBV_FMT_16BPP:
+#ifdef ZMBV_ENABLE_24BPP
+ case ZMBV_FMT_24BPP:
+#endif
+ case ZMBV_FMT_32BPP:
+ for (j = 0; j < c->height; j++) {
+ memcpy(out, src, c->stride);
+ src += c->stride;
+ out += frame->linesize[0];
+ }
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "Cannot handle format %i\n", c->fmt);
+ }
+ FFSWAP(uint8_t *, c->cur, c->prev);
+ }
+ *got_frame = 1;
+
+ /* always report that the buffer was completely consumed */
+ return buf_size;
+}
+
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+ ZmbvContext * const c = avctx->priv_data;
+ int zret; // Zlib return code
+
+ c->avctx = avctx;
+
+ c->width = avctx->width;
+ c->height = avctx->height;
+
+ c->bpp = avctx->bits_per_coded_sample;
+
+ // Needed if zlib unused or init aborted before inflateInit
+ memset(&c->zstream, 0, sizeof(z_stream));
+
+ c->decomp_size = (avctx->width + 255) * 4 * (avctx->height + 64);
+
+ /* Allocate decompression buffer */
+ if (c->decomp_size) {
+ if ((c->decomp_buf = av_mallocz(c->decomp_size)) == NULL) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Can't allocate decompression buffer.\n");
+ return AVERROR(ENOMEM);
+ }
+ }
+
+ 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 AVERROR_UNKNOWN;
+ }
+
+ return 0;
+}
+
+static av_cold int decode_end(AVCodecContext *avctx)
+{
+ ZmbvContext * const c = avctx->priv_data;
+
+ av_freep(&c->decomp_buf);
+
+ inflateEnd(&c->zstream);
+ av_freep(&c->cur);
+ av_freep(&c->prev);
+
+ return 0;
+}
+
+AVCodec ff_zmbv_decoder = {
+ .name = "zmbv",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_ZMBV,
+ .priv_data_size = sizeof(ZmbvContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Zip Motion Blocks Video"),
+};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 17:35:54 +0000