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Diffstat (limited to 'ffmpeg1/libavcodec/dxa.c')
-rw-r--r--ffmpeg1/libavcodec/dxa.c331
1 files changed, 0 insertions, 331 deletions
diff --git a/ffmpeg1/libavcodec/dxa.c b/ffmpeg1/libavcodec/dxa.c
deleted file mode 100644
index 2286f33..0000000
--- a/ffmpeg1/libavcodec/dxa.c
+++ /dev/null
@@ -1,331 +0,0 @@
-/*
- * Feeble Files/ScummVM DXA decoder
- * Copyright (c) 2007 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
- * DXA Video decoder
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "libavutil/common.h"
-#include "libavutil/intreadwrite.h"
-#include "bytestream.h"
-#include "avcodec.h"
-#include "internal.h"
-
-#include <zlib.h>
-
-/*
- * Decoder context
- */
-typedef struct DxaDecContext {
- AVFrame prev;
-
- int dsize;
- uint8_t *decomp_buf;
- uint32_t pal[256];
-} DxaDecContext;
-
-static const int shift1[6] = { 0, 8, 8, 8, 4, 4 };
-static const int shift2[6] = { 0, 0, 8, 4, 0, 4 };
-
-static int decode_13(AVCodecContext *avctx, DxaDecContext *c, uint8_t* dst,
- int stride, uint8_t *src, uint8_t *ref)
-{
- uint8_t *code, *data, *mv, *msk, *tmp, *tmp2;
- int i, j, k;
- int type, x, y, d, d2;
- uint32_t mask;
-
- code = src + 12;
- data = code + ((avctx->width * avctx->height) >> 4);
- mv = data + AV_RB32(src + 0);
- msk = mv + AV_RB32(src + 4);
-
- for(j = 0; j < avctx->height; j += 4){
- for(i = 0; i < avctx->width; i += 4){
- tmp = dst + i;
- tmp2 = ref + i;
- type = *code++;
- switch(type){
- case 4: // motion compensation
- x = (*mv) >> 4; if(x & 8) x = 8 - x;
- y = (*mv++) & 0xF; if(y & 8) y = 8 - y;
- tmp2 += x + y*stride;
- case 0: // skip
- case 5: // skip in method 12
- for(y = 0; y < 4; y++){
- memcpy(tmp, tmp2, 4);
- tmp += stride;
- tmp2 += stride;
- }
- break;
- case 1: // masked change
- case 10: // masked change with only half of pixels changed
- case 11: // cases 10-15 are for method 12 only
- case 12:
- case 13:
- case 14:
- case 15:
- if(type == 1){
- mask = AV_RB16(msk);
- msk += 2;
- }else{
- type -= 10;
- mask = ((msk[0] & 0xF0) << shift1[type]) | ((msk[0] & 0xF) << shift2[type]);
- msk++;
- }
- for(y = 0; y < 4; y++){
- for(x = 0; x < 4; x++){
- tmp[x] = (mask & 0x8000) ? *data++ : tmp2[x];
- mask <<= 1;
- }
- tmp += stride;
- tmp2 += stride;
- }
- break;
- case 2: // fill block
- for(y = 0; y < 4; y++){
- memset(tmp, data[0], 4);
- tmp += stride;
- }
- data++;
- break;
- case 3: // raw block
- for(y = 0; y < 4; y++){
- memcpy(tmp, data, 4);
- data += 4;
- tmp += stride;
- }
- break;
- case 8: // subblocks - method 13 only
- mask = *msk++;
- for(k = 0; k < 4; k++){
- d = ((k & 1) << 1) + ((k & 2) * stride);
- d2 = ((k & 1) << 1) + ((k & 2) * stride);
- tmp2 = ref + i + d2;
- switch(mask & 0xC0){
- case 0x80: // motion compensation
- x = (*mv) >> 4; if(x & 8) x = 8 - x;
- y = (*mv++) & 0xF; if(y & 8) y = 8 - y;
- tmp2 += x + y*stride;
- case 0x00: // skip
- tmp[d + 0 ] = tmp2[0];
- tmp[d + 1 ] = tmp2[1];
- tmp[d + 0 + stride] = tmp2[0 + stride];
- tmp[d + 1 + stride] = tmp2[1 + stride];
- break;
- case 0x40: // fill
- tmp[d + 0 ] = data[0];
- tmp[d + 1 ] = data[0];
- tmp[d + 0 + stride] = data[0];
- tmp[d + 1 + stride] = data[0];
- data++;
- break;
- case 0xC0: // raw
- tmp[d + 0 ] = *data++;
- tmp[d + 1 ] = *data++;
- tmp[d + 0 + stride] = *data++;
- tmp[d + 1 + stride] = *data++;
- break;
- }
- mask <<= 2;
- }
- break;
- case 32: // vector quantization - 2 colors
- mask = AV_RB16(msk);
- msk += 2;
- for(y = 0; y < 4; y++){
- for(x = 0; x < 4; x++){
- tmp[x] = data[mask & 1];
- mask >>= 1;
- }
- tmp += stride;
- tmp2 += stride;
- }
- data += 2;
- break;
- case 33: // vector quantization - 3 or 4 colors
- case 34:
- mask = AV_RB32(msk);
- msk += 4;
- for(y = 0; y < 4; y++){
- for(x = 0; x < 4; x++){
- tmp[x] = data[mask & 3];
- mask >>= 2;
- }
- tmp += stride;
- tmp2 += stride;
- }
- data += type - 30;
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Unknown opcode %d\n", type);
- return AVERROR_INVALIDDATA;
- }
- }
- dst += stride * 4;
- ref += stride * 4;
- }
- return 0;
-}
-
-static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
-{
- AVFrame *frame = data;
- DxaDecContext * const c = avctx->priv_data;
- uint8_t *outptr, *srcptr, *tmpptr;
- unsigned long dsize;
- int i, j, compr, ret;
- int stride;
- int pc = 0;
- GetByteContext gb;
-
- bytestream2_init(&gb, avpkt->data, avpkt->size);
-
- /* make the palette available on the way out */
- if (bytestream2_peek_le32(&gb) == MKTAG('C','M','A','P')) {
- bytestream2_skip(&gb, 4);
- for(i = 0; i < 256; i++){
- c->pal[i] = 0xFFU << 24 | bytestream2_get_be24(&gb);
- }
- pc = 1;
- }
-
- if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
- return ret;
- memcpy(frame->data[1], c->pal, AVPALETTE_SIZE);
- frame->palette_has_changed = pc;
-
- outptr = frame->data[0];
- srcptr = c->decomp_buf;
- tmpptr = c->prev.data[0];
- stride = frame->linesize[0];
-
- if (bytestream2_get_le32(&gb) == MKTAG('N','U','L','L'))
- compr = -1;
- else
- compr = bytestream2_get_byte(&gb);
-
- dsize = c->dsize;
- if (compr != 4 && compr != -1) {
- bytestream2_skip(&gb, 4);
- if (uncompress(c->decomp_buf, &dsize, avpkt->data + bytestream2_tell(&gb),
- bytestream2_get_bytes_left(&gb)) != Z_OK) {
- av_log(avctx, AV_LOG_ERROR, "Uncompress failed!\n");
- return AVERROR_UNKNOWN;
- }
- }
- switch(compr){
- case -1:
- frame->key_frame = 0;
- frame->pict_type = AV_PICTURE_TYPE_P;
- if(c->prev.data[0])
- memcpy(frame->data[0], c->prev.data[0], frame->linesize[0] * avctx->height);
- else{ // Should happen only when first frame is 'NULL'
- memset(frame->data[0], 0, frame->linesize[0] * avctx->height);
- frame->key_frame = 1;
- frame->pict_type = AV_PICTURE_TYPE_I;
- }
- break;
- case 2:
- case 3:
- case 4:
- case 5:
- frame->key_frame = !(compr & 1);
- frame->pict_type = (compr & 1) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
- for(j = 0; j < avctx->height; j++){
- if((compr & 1) && tmpptr){
- for(i = 0; i < avctx->width; i++)
- outptr[i] = srcptr[i] ^ tmpptr[i];
- tmpptr += stride;
- }else
- memcpy(outptr, srcptr, avctx->width);
- outptr += stride;
- srcptr += avctx->width;
- }
- break;
- case 12: // ScummVM coding
- case 13:
- frame->key_frame = 0;
- frame->pict_type = AV_PICTURE_TYPE_P;
- if (!c->prev.data[0]) {
- av_log(avctx, AV_LOG_ERROR, "Missing reference frame\n");
- return AVERROR_INVALIDDATA;
- }
- decode_13(avctx, c, frame->data[0], frame->linesize[0], srcptr, c->prev.data[0]);
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Unknown/unsupported compression type %d\n", compr);
- return AVERROR_INVALIDDATA;
- }
-
- av_frame_unref(&c->prev);
- if ((ret = av_frame_ref(&c->prev, frame)) < 0)
- return ret;
-
- *got_frame = 1;
-
- /* always report that the buffer was completely consumed */
- return avpkt->size;
-}
-
-static av_cold int decode_init(AVCodecContext *avctx)
-{
- DxaDecContext * const c = avctx->priv_data;
-
- avctx->pix_fmt = AV_PIX_FMT_PAL8;
-
- avcodec_get_frame_defaults(&c->prev);
-
- c->dsize = avctx->width * avctx->height * 2;
- c->decomp_buf = av_malloc(c->dsize);
- if (!c->decomp_buf) {
- av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
- return AVERROR(ENOMEM);
- }
-
- return 0;
-}
-
-static av_cold int decode_end(AVCodecContext *avctx)
-{
- DxaDecContext * const c = avctx->priv_data;
-
- av_freep(&c->decomp_buf);
- av_frame_unref(&c->prev);
-
- return 0;
-}
-
-AVCodec ff_dxa_decoder = {
- .name = "dxa",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_DXA,
- .priv_data_size = sizeof(DxaDecContext),
- .init = decode_init,
- .close = decode_end,
- .decode = decode_frame,
- .capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("Feeble Files/ScummVM DXA"),
-};
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