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Diffstat (limited to 'src/libffmpeg/libavcodec/kmvc.c')
-rw-r--r--src/libffmpeg/libavcodec/kmvc.c417
1 files changed, 0 insertions, 417 deletions
diff --git a/src/libffmpeg/libavcodec/kmvc.c b/src/libffmpeg/libavcodec/kmvc.c
deleted file mode 100644
index 28dc01483..000000000
--- a/src/libffmpeg/libavcodec/kmvc.c
+++ /dev/null
@@ -1,417 +0,0 @@
-/*
- * KMVC 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 kmvc.c
- * Karl Morton's Video Codec decoder
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "common.h"
-#include "avcodec.h"
-
-#define KMVC_KEYFRAME 0x80
-#define KMVC_PALETTE 0x40
-#define KMVC_METHOD 0x0F
-
-/*
- * Decoder context
- */
-typedef struct KmvcContext {
- AVCodecContext *avctx;
- AVFrame pic;
-
- int setpal;
- int palsize;
- uint32_t pal[256];
- uint8_t *cur, *prev;
- uint8_t *frm0, *frm1;
-} KmvcContext;
-
-typedef struct BitBuf {
- int bits;
- int bitbuf;
-} BitBuf;
-
-#define BLK(data, x, y) data[(x) + (y) * 320]
-
-#define kmvc_init_getbits(bb, src) bb.bits = 7; bb.bitbuf = *src++;
-
-#define kmvc_getbit(bb, src, res) {\
- res = 0; \
- if (bb.bitbuf & (1 << bb.bits)) res = 1; \
- bb.bits--; \
- if(bb.bits == -1) { \
- bb.bitbuf = *src++; \
- bb.bits = 7; \
- } \
-}
-
-static void kmvc_decode_intra_8x8(KmvcContext * ctx, uint8_t * src, int w, int h)
-{
- BitBuf bb;
- int res, val;
- int i, j;
- int bx, by;
- int l0x, l1x, l0y, l1y;
- int mx, my;
-
- kmvc_init_getbits(bb, src);
-
- for (by = 0; by < h; by += 8)
- for (bx = 0; bx < w; bx += 8) {
- kmvc_getbit(bb, src, res);
- if (!res) { // fill whole 8x8 block
- val = *src++;
- for (i = 0; i < 64; i++)
- BLK(ctx->cur, bx + (i & 0x7), by + (i >> 3)) = val;
- } else { // handle four 4x4 subblocks
- for (i = 0; i < 4; i++) {
- l0x = bx + (i & 1) * 4;
- l0y = by + (i & 2) * 2;
- kmvc_getbit(bb, src, res);
- if (!res) {
- kmvc_getbit(bb, src, res);
- if (!res) { // fill whole 4x4 block
- val = *src++;
- for (j = 0; j < 16; j++)
- BLK(ctx->cur, l0x + (j & 3), l0y + (j >> 2)) = val;
- } else { // copy block from already decoded place
- val = *src++;
- mx = val & 0xF;
- my = val >> 4;
- for (j = 0; j < 16; j++)
- BLK(ctx->cur, l0x + (j & 3), l0y + (j >> 2)) =
- BLK(ctx->cur, l0x + (j & 3) - mx, l0y + (j >> 2) - my);
- }
- } else { // descend to 2x2 sub-sub-blocks
- for (j = 0; j < 4; j++) {
- l1x = l0x + (j & 1) * 2;
- l1y = l0y + (j & 2);
- kmvc_getbit(bb, src, res);
- if (!res) {
- kmvc_getbit(bb, src, res);
- if (!res) { // fill whole 2x2 block
- val = *src++;
- BLK(ctx->cur, l1x, l1y) = val;
- BLK(ctx->cur, l1x + 1, l1y) = val;
- BLK(ctx->cur, l1x, l1y + 1) = val;
- BLK(ctx->cur, l1x + 1, l1y + 1) = val;
- } else { // copy block from already decoded place
- val = *src++;
- mx = val & 0xF;
- my = val >> 4;
- BLK(ctx->cur, l1x, l1y) = BLK(ctx->cur, l1x - mx, l1y - my);
- BLK(ctx->cur, l1x + 1, l1y) =
- BLK(ctx->cur, l1x + 1 - mx, l1y - my);
- BLK(ctx->cur, l1x, l1y + 1) =
- BLK(ctx->cur, l1x - mx, l1y + 1 - my);
- BLK(ctx->cur, l1x + 1, l1y + 1) =
- BLK(ctx->cur, l1x + 1 - mx, l1y + 1 - my);
- }
- } else { // read values for block
- BLK(ctx->cur, l1x, l1y) = *src++;
- BLK(ctx->cur, l1x + 1, l1y) = *src++;
- BLK(ctx->cur, l1x, l1y + 1) = *src++;
- BLK(ctx->cur, l1x + 1, l1y + 1) = *src++;
- }
- }
- }
- }
- }
- }
-}
-
-static void kmvc_decode_inter_8x8(KmvcContext * ctx, uint8_t * src, int w, int h)
-{
- BitBuf bb;
- int res, val;
- int i, j;
- int bx, by;
- int l0x, l1x, l0y, l1y;
- int mx, my;
-
- kmvc_init_getbits(bb, src);
-
- for (by = 0; by < h; by += 8)
- for (bx = 0; bx < w; bx += 8) {
- kmvc_getbit(bb, src, res);
- if (!res) {
- kmvc_getbit(bb, src, res);
- if (!res) { // fill whole 8x8 block
- val = *src++;
- for (i = 0; i < 64; i++)
- BLK(ctx->cur, bx + (i & 0x7), by + (i >> 3)) = val;
- } else { // copy block from previous frame
- for (i = 0; i < 64; i++)
- BLK(ctx->cur, bx + (i & 0x7), by + (i >> 3)) =
- BLK(ctx->prev, bx + (i & 0x7), by + (i >> 3));
- }
- } else { // handle four 4x4 subblocks
- for (i = 0; i < 4; i++) {
- l0x = bx + (i & 1) * 4;
- l0y = by + (i & 2) * 2;
- kmvc_getbit(bb, src, res);
- if (!res) {
- kmvc_getbit(bb, src, res);
- if (!res) { // fill whole 4x4 block
- val = *src++;
- for (j = 0; j < 16; j++)
- BLK(ctx->cur, l0x + (j & 3), l0y + (j >> 2)) = val;
- } else { // copy block
- val = *src++;
- mx = (val & 0xF) - 8;
- my = (val >> 4) - 8;
- for (j = 0; j < 16; j++)
- BLK(ctx->cur, l0x + (j & 3), l0y + (j >> 2)) =
- BLK(ctx->prev, l0x + (j & 3) + mx, l0y + (j >> 2) + my);
- }
- } else { // descend to 2x2 sub-sub-blocks
- for (j = 0; j < 4; j++) {
- l1x = l0x + (j & 1) * 2;
- l1y = l0y + (j & 2);
- kmvc_getbit(bb, src, res);
- if (!res) {
- kmvc_getbit(bb, src, res);
- if (!res) { // fill whole 2x2 block
- val = *src++;
- BLK(ctx->cur, l1x, l1y) = val;
- BLK(ctx->cur, l1x + 1, l1y) = val;
- BLK(ctx->cur, l1x, l1y + 1) = val;
- BLK(ctx->cur, l1x + 1, l1y + 1) = val;
- } else { // copy block
- val = *src++;
- mx = (val & 0xF) - 8;
- my = (val >> 4) - 8;
- BLK(ctx->cur, l1x, l1y) = BLK(ctx->prev, l1x + mx, l1y + my);
- BLK(ctx->cur, l1x + 1, l1y) =
- BLK(ctx->prev, l1x + 1 + mx, l1y + my);
- BLK(ctx->cur, l1x, l1y + 1) =
- BLK(ctx->prev, l1x + mx, l1y + 1 + my);
- BLK(ctx->cur, l1x + 1, l1y + 1) =
- BLK(ctx->prev, l1x + 1 + mx, l1y + 1 + my);
- }
- } else { // read values for block
- BLK(ctx->cur, l1x, l1y) = *src++;
- BLK(ctx->cur, l1x + 1, l1y) = *src++;
- BLK(ctx->cur, l1x, l1y + 1) = *src++;
- BLK(ctx->cur, l1x + 1, l1y + 1) = *src++;
- }
- }
- }
- }
- }
- }
-}
-
-static int decode_frame(AVCodecContext * avctx, void *data, int *data_size, uint8_t * buf,
- int buf_size)
-{
- KmvcContext *const ctx = (KmvcContext *) avctx->priv_data;
- uint8_t *out, *src;
- int i;
- int header;
- int blocksize;
-
- if (ctx->pic.data[0])
- avctx->release_buffer(avctx, &ctx->pic);
-
- ctx->pic.reference = 1;
- ctx->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
- if (avctx->get_buffer(avctx, &ctx->pic) < 0) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
-
- header = *buf++;
-
- /* blocksize 127 is really palette change event */
- if (buf[0] == 127) {
- buf += 3;
- for (i = 0; i < 127; i++) {
- ctx->pal[i + (header & 0x81)] = (buf[0] << 16) | (buf[1] << 8) | buf[2];
- buf += 4;
- }
- buf -= 127 * 4 + 3;
- }
-
- if (header & KMVC_KEYFRAME) {
- ctx->pic.key_frame = 1;
- ctx->pic.pict_type = FF_I_TYPE;
- } else {
- ctx->pic.key_frame = 0;
- ctx->pic.pict_type = FF_P_TYPE;
- }
-
- /* if palette has been changed, copy it from palctrl */
- if (ctx->avctx->palctrl && ctx->avctx->palctrl->palette_changed) {
- memcpy(ctx->pal, ctx->avctx->palctrl->palette, AVPALETTE_SIZE);
- ctx->setpal = 1;
- ctx->avctx->palctrl->palette_changed = 0;
- }
-
- if (header & KMVC_PALETTE) {
- ctx->pic.palette_has_changed = 1;
- // palette starts from index 1 and has 127 entries
- for (i = 1; i <= ctx->palsize; i++) {
- ctx->pal[i] = (buf[0] << 16) | (buf[1] << 8) | buf[2];
- buf += 3;
- }
- }
-
- if (ctx->setpal) {
- ctx->setpal = 0;
- ctx->pic.palette_has_changed = 1;
- }
-
- /* make the palette available on the way out */
- memcpy(ctx->pic.data[1], ctx->pal, 1024);
-
- blocksize = *buf++;
-
- if (blocksize != 8 && blocksize != 127) {
- av_log(avctx, AV_LOG_ERROR, "Block size = %i\n", blocksize);
- return -1;
- }
- memset(ctx->cur, 0, 320 * 200);
- switch (header & KMVC_METHOD) {
- case 0:
- case 1: // used in palette changed event
- memcpy(ctx->cur, ctx->prev, 320 * 200);
- break;
- case 3:
- kmvc_decode_intra_8x8(ctx, buf, avctx->width, avctx->height);
- break;
- case 4:
- kmvc_decode_inter_8x8(ctx, buf, avctx->width, avctx->height);
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Unknown compression method %i\n", header & KMVC_METHOD);
- return -1;
- }
-
- out = ctx->pic.data[0];
- src = ctx->cur;
- for (i = 0; i < avctx->height; i++) {
- memcpy(out, src, avctx->width);
- src += 320;
- out += ctx->pic.linesize[0];
- }
-
- /* flip buffers */
- if (ctx->cur == ctx->frm0) {
- ctx->cur = ctx->frm1;
- ctx->prev = ctx->frm0;
- } else {
- ctx->cur = ctx->frm0;
- ctx->prev = ctx->frm1;
- }
-
- *data_size = sizeof(AVFrame);
- *(AVFrame *) data = ctx->pic;
-
- /* always report that the buffer was completely consumed */
- return buf_size;
-}
-
-
-
-/*
- * Init kmvc decoder
- */
-static int decode_init(AVCodecContext * avctx)
-{
- KmvcContext *const c = (KmvcContext *) avctx->priv_data;
- int i;
-
- c->avctx = avctx;
- avctx->has_b_frames = 0;
-
- c->pic.data[0] = NULL;
-
- if (avctx->width > 320 || avctx->height > 200) {
- av_log(avctx, AV_LOG_ERROR, "KMVC supports frames <= 320x200\n");
- return -1;
- }
-
- c->frm0 = av_mallocz(320 * 200);
- c->frm1 = av_mallocz(320 * 200);
- c->cur = c->frm0;
- c->prev = c->frm1;
-
- for (i = 0; i < 256; i++) {
- c->pal[i] = i * 0x10101;
- }
-
- if (avctx->extradata_size < 12) {
- av_log(NULL, 0, "Extradata missing, decoding may not work properly...\n");
- c->palsize = 127;
- } else {
- c->palsize = AV_RL16(avctx->extradata + 10);
- }
-
- if (avctx->extradata_size == 1036) { // palette in extradata
- uint8_t *src = avctx->extradata + 12;
- for (i = 0; i < 256; i++) {
- c->pal[i] = AV_RL32(src);
- src += 4;
- }
- c->setpal = 1;
- if (c->avctx->palctrl) {
- c->avctx->palctrl->palette_changed = 0;
- }
- }
-
- avctx->pix_fmt = PIX_FMT_PAL8;
-
- return 0;
-}
-
-
-
-/*
- * Uninit kmvc decoder
- */
-static int decode_end(AVCodecContext * avctx)
-{
- KmvcContext *const c = (KmvcContext *) avctx->priv_data;
-
- av_freep(&c->frm0);
- av_freep(&c->frm1);
- if (c->pic.data[0])
- avctx->release_buffer(avctx, &c->pic);
-
- return 0;
-}
-
-AVCodec kmvc_decoder = {
- "kmvc",
- CODEC_TYPE_VIDEO,
- CODEC_ID_KMVC,
- sizeof(KmvcContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame
-};
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