--- /dev/null
+/*
+ * Indel Indeo 2 codec
+ * Copyright (c) 2005 Konstantin Shishkov
+ *
+ * This library 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.
+ *
+ * This library 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
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+/**
+ * @file indeo2.c
+ * Intel Indeo 2 decoder.
+ */
+
+#include "avcodec.h"
+#include "bitstream.h"
+#include "indeo2data.h"
+
+typedef struct Ir2Context{
+ AVCodecContext *avctx;
+ AVFrame picture;
+ GetBitContext gb;
+ int decode_delta;
+} Ir2Context;
+
+#define CODE_VLC_BITS 14
+static VLC ir2_vlc;
+
+/* Indeo 2 codes are in range 0x01..0x7F and 0x81..0x90 */
+static inline int ir2_get_code(GetBitContext *gb)
+{
+ int code;
+
+ code = get_vlc2(gb, ir2_vlc.table, CODE_VLC_BITS, 1) + 1;
+ if (code >= 0x80)
+ return (code + 1);
+ return code;
+}
+#define CLAMP_TO_BYTE(value) \
+if (value > 255) \
+ value = 255; \
+else if (value < 0) \
+ value = 0; \
+
+static void ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst, int stride,
+ const uint8_t *table)
+{
+ int i;
+ int j;
+ int out = 0;
+ int c;
+ int t;
+
+ /* first line contain absolute values, other lines contain deltas */
+ while (out < width){
+ c = ir2_get_code(&ctx->gb);
+ if(c > 0x80) { /* we have a run */
+ c -= 0x80;
+ for (i = 0; i < c * 2; i++)
+ dst[out++] = 0x80;
+ } else { /* copy two values from table */
+ dst[out++] = table[c * 2];
+ dst[out++] = table[(c * 2) + 1];
+ }
+ }
+ dst += stride;
+
+ for (j = 1; j < height; j++){
+ out = 0;
+ while (out < width){
+ c = ir2_get_code(&ctx->gb);
+ if(c > 0x80) { /* we have a skip */
+ c -= 0x80;
+ for (i = 0; i < c * 2; i++) {
+ dst[out] = dst[out - stride];
+ out++;
+ }
+ } else { /* add two deltas from table */
+ t = dst[out - stride] + (table[c * 2] - 128);
+ CLAMP_TO_BYTE(t);
+ dst[out] = t;
+ out++;
+ t = dst[out - stride] + (table[(c * 2) + 1] - 128);
+ CLAMP_TO_BYTE(t);
+ dst[out] = t;
+ out++;
+ }
+ }
+ dst += stride;
+ }
+}
+
+static void ir2_decode_plane_inter(Ir2Context *ctx, int width, int height, uint8_t *dst, int stride,
+ const uint8_t *table)
+{
+ int j;
+ int out = 0;
+ int c;
+ int t;
+
+ for (j = 0; j < height; j++){
+ out = 0;
+ while (out < width){
+ c = ir2_get_code(&ctx->gb);
+ if(c > 0x80) { /* we have a skip */
+ c -= 0x80;
+ out += c * 2;
+ } else { /* add two deltas from table */
+ t = dst[out] + (table[c * 2] - 128);
+ CLAMP_TO_BYTE(t);
+ dst[out] = t;
+ out++;
+ t = dst[out] + (table[(c * 2) + 1] - 128);
+ CLAMP_TO_BYTE(t);
+ dst[out] = t;
+ out++;
+ }
+ }
+ dst += stride;
+ }
+}
+
+static int ir2_decode_frame(AVCodecContext *avctx,
+ void *data, int *data_size,
+ uint8_t *buf, int buf_size)
+{
+ Ir2Context * const s = avctx->priv_data;
+ AVFrame *picture = data;
+ AVFrame * const p= (AVFrame*)&s->picture;
+ int start;
+ int i;
+
+ if(p->data[0])
+ avctx->release_buffer(avctx, p);
+
+ p->reference = 1;
+ p->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
+ if (avctx->reget_buffer(avctx, p)) {
+ av_log(s->avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+ return -1;
+ }
+
+ s->decode_delta = buf[18];
+
+ /* decide whether frame uses deltas or not */
+
+ for (i = 0; i < buf_size; i++)
+ buf[i] = ff_reverse[buf[i]];
+
+ start = 48; /* hardcoded for now */
+
+ init_get_bits(&s->gb, buf + start, buf_size - start);
+
+ if (s->decode_delta) { /* intraframe */
+ ir2_decode_plane(s, avctx->width, avctx->height,
+ s->picture.data[0], s->picture.linesize[0], ir2_luma_table);
+ /* swapped U and V */
+ ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2,
+ s->picture.data[2], s->picture.linesize[2], ir2_luma_table);
+ ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2,
+ s->picture.data[1], s->picture.linesize[1], ir2_luma_table);
+ } else { /* interframe */
+ ir2_decode_plane_inter(s, avctx->width, avctx->height,
+ s->picture.data[0], s->picture.linesize[0], ir2_luma_table);
+ /* swapped U and V */
+ ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2,
+ s->picture.data[2], s->picture.linesize[2], ir2_luma_table);
+ ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2,
+ s->picture.data[1], s->picture.linesize[1], ir2_luma_table);
+ }
+
+ *picture= *(AVFrame*)&s->picture;
+ *data_size = sizeof(AVPicture);
+
+ return buf_size;
+}
+
+static int ir2_decode_init(AVCodecContext *avctx){
+ Ir2Context * const ic = avctx->priv_data;
+
+ ic->avctx = avctx;
+
+ avctx->pix_fmt= PIX_FMT_YUV410P;
+
+ if (!ir2_vlc.table)
+ init_vlc(&ir2_vlc, CODE_VLC_BITS, IR2_CODES,
+ &ir2_codes[0][1], 4, 2,
+ &ir2_codes[0][0], 4, 2, 1);
+
+ return 0;
+}
+
+AVCodec indeo2_decoder = {
+ "indeo2",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_INDEO2,
+ sizeof(Ir2Context),
+ ir2_decode_init,
+ NULL,
+ NULL,
+ ir2_decode_frame,
+ CODEC_CAP_DR1,
+};
--- /dev/null
+#define IR2_CODES 143
+static const uint16_t ir2_codes[IR2_CODES][2] = {
+ {0x0000, 3}, {0x0001, 3}, {0x0003, 3}, {0x0010, 5},
+ {0x0012, 5}, {0x0013, 5}, {0x0016, 5}, {0x0017, 5},
+ {0x0031, 6}, {0x0032, 6}, {0x0033, 6}, {0x0034, 6},
+ {0x0035, 6}, {0x0036, 6}, {0x00E0, 8}, {0x00E1, 8},
+ {0x00E4, 8}, {0x00E5, 8}, {0x00E6, 8}, {0x00E7, 8},
+ {0x00E9, 8}, {0x00EA, 8}, {0x00EC, 8}, {0x00ED, 8},
+ {0x00EF, 8}, {0x01E0, 9}, {0x01E2, 9}, {0x01E3, 9},
+ {0x01E5, 9}, {0x01E6, 9}, {0x01E8, 9}, {0x01E9, 9},
+ {0x01EB, 9}, {0x01EC, 9}, {0x01EE, 9}, {0x01EF, 9},
+ {0x03E0, 10}, {0x03E1, 10}, {0x03E2, 10}, {0x03E3, 10},
+ {0x03E4, 10}, {0x03E5, 10}, {0x03E6, 10}, {0x03E7, 10},
+ {0x03E8, 10}, {0x03E9, 10}, {0x03EA, 10}, {0x03EB, 10},
+ {0x03EC, 10}, {0x03ED, 10}, {0x03EE, 10}, {0x03EF, 10},
+ {0x1F80, 13}, {0x1F81, 13}, {0x1F82, 13}, {0x1F83, 13},
+ {0x1F84, 13}, {0x1F85, 13}, {0x1F86, 13}, {0x1F87, 13},
+ {0x1F88, 13}, {0x1F89, 13}, {0x1F8A, 13}, {0x1F8B, 13},
+ {0x1F8C, 13}, {0x1F8D, 13}, {0x1F8E, 13}, {0x1F8F, 13},
+ {0x1F90, 13}, {0x1F91, 13}, {0x1F92, 13}, {0x1F93, 13},
+ {0x1F94, 13}, {0x1F95, 13}, {0x1F96, 13}, {0x1F97, 13},
+ {0x1F98, 13}, {0x1F99, 13}, {0x1F9A, 13}, {0x1F9B, 13},
+ {0x1F9C, 13}, {0x1F9D, 13}, {0x1F9E, 13}, {0x1F9F, 13},
+ {0x1FA0, 13}, {0x1FA1, 13}, {0x1FA2, 13}, {0x1FA3, 13},
+ {0x1FA4, 13}, {0x1FA5, 13}, {0x1FA6, 13}, {0x1FA7, 13},
+ {0x1FA8, 13}, {0x1FA9, 13}, {0x1FAA, 13}, {0x1FAB, 13},
+ {0x1FAC, 13}, {0x1FAD, 13}, {0x1FAE, 13}, {0x1FAF, 13},
+ {0x1FB0, 13}, {0x1FB1, 13}, {0x1FB2, 13}, {0x1FB3, 13},
+ {0x1FB4, 13}, {0x1FB5, 13}, {0x1FB6, 13}, {0x1FB7, 13},
+ {0x1FB8, 13}, {0x1FB9, 13}, {0x1FBA, 13}, {0x1FBB, 13},
+ {0x1FBC, 13}, {0x1FBD, 13}, {0x1FBE, 13}, {0x1FBF, 13},
+ {0x3F80, 14}, {0x3F81, 14}, {0x3F82, 14}, {0x3F83, 14},
+ {0x3F84, 14}, {0x3F85, 14}, {0x3F86, 14}, {0x3F87, 14},
+ {0x3F88, 14}, {0x3F89, 14}, {0x3F8A, 14}, {0x0002, 3},
+ {0x0011, 5}, {0x0014, 5}, {0x0015, 5}, {0x0030, 6},
+ {0x0037, 6}, {0x00E2, 8}, {0x00E3, 8}, {0x00E8, 8},
+ {0x00EB, 8}, {0x00EE, 8}, {0x01E1, 9}, {0x01E4, 9},
+ {0x01E7, 9}, {0x01EA, 9}, {0x01ED, 9}
+};
+
+static const uint8_t ir2_luma_table[256] = {
+ 0x80, 0x80, 0x84, 0x84, 0x7C, 0x7C, 0x7F, 0x85,
+ 0x81, 0x7B, 0x85, 0x7F, 0x7B, 0x81, 0x8C, 0x8C,
+ 0x74, 0x74, 0x83, 0x8D, 0x7D, 0x73, 0x8D, 0x83,
+ 0x73, 0x7D, 0x77, 0x89, 0x89, 0x77, 0x89, 0x77,
+ 0x77, 0x89, 0x8C, 0x95, 0x74, 0x6B, 0x95, 0x8C,
+ 0x6B, 0x74, 0x7C, 0x90, 0x84, 0x70, 0x90, 0x7C,
+ 0x70, 0x84, 0x96, 0x96, 0x6A, 0x6A, 0x82, 0x98,
+ 0x7E, 0x68, 0x98, 0x82, 0x68, 0x7E, 0x97, 0xA2,
+ 0x69, 0x5E, 0xA2, 0x97, 0x5E, 0x69, 0xA2, 0xA2,
+ 0x5E, 0x5E, 0x8B, 0xA3, 0x75, 0x5D, 0xA3, 0x8B,
+ 0x5D, 0x75, 0x71, 0x95, 0x8F, 0x6B, 0x95, 0x71,
+ 0x6B, 0x8F, 0x78, 0x9D, 0x88, 0x63, 0x9D, 0x78,
+ 0x63, 0x88, 0x7F, 0xA7, 0x81, 0x59, 0xA7, 0x7F,
+ 0x59, 0x81, 0xA4, 0xB1, 0x5C, 0x4F, 0xB1, 0xA4,
+ 0x4F, 0x5C, 0x96, 0xB1, 0x6A, 0x4F, 0xB1, 0x96,
+ 0x4F, 0x6A, 0xB2, 0xB2, 0x4E, 0x4E, 0x65, 0x9B,
+ 0x9B, 0x65, 0x9B, 0x65, 0x65, 0x9B, 0x89, 0xB4,
+ 0x77, 0x4C, 0xB4, 0x89, 0x4C, 0x77, 0x6A, 0xA3,
+ 0x96, 0x5D, 0xA3, 0x6A, 0x5D, 0x96, 0x73, 0xAC,
+ 0x8D, 0x54, 0xAC, 0x73, 0x54, 0x8D, 0xB4, 0xC3,
+ 0x4C, 0x3D, 0xC3, 0xB4, 0x3D, 0x4C, 0xA4, 0xC3,
+ 0x5C, 0x3D, 0xC3, 0xA4, 0x3D, 0x5C, 0xC4, 0xC4,
+ 0x3C, 0x3C, 0x96, 0xC6, 0x6A, 0x3A, 0xC6, 0x96,
+ 0x3A, 0x6A, 0x7C, 0xBA, 0x84, 0x46, 0xBA, 0x7C,
+ 0x46, 0x84, 0x5B, 0xAB, 0xA5, 0x55, 0xAB, 0x5B,
+ 0x55, 0xA5, 0x63, 0xB4, 0x9D, 0x4C, 0xB4, 0x63,
+ 0x4C, 0x9D, 0x86, 0xCA, 0x7A, 0x36, 0xCA, 0x86,
+ 0x36, 0x7A, 0xB6, 0xD7, 0x4A, 0x29, 0xD7, 0xB6,
+ 0x29, 0x4A, 0xC8, 0xD7, 0x38, 0x29, 0xD7, 0xC8,
+ 0x29, 0x38, 0xA4, 0xD8, 0x5C, 0x28, 0xD8, 0xA4,
+ 0x28, 0x5C, 0x6C, 0xC1, 0x94, 0x3F, 0xC1, 0x6C,
+ 0x3F, 0x94, 0xD9, 0xD9, 0x27, 0x27, 0x80, 0x80
+};