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Diffstat (limited to 'ffmpeg/libavcodec/indeo2.c')
-rw-r--r--ffmpeg/libavcodec/indeo2.c258
1 files changed, 0 insertions, 258 deletions
diff --git a/ffmpeg/libavcodec/indeo2.c b/ffmpeg/libavcodec/indeo2.c
deleted file mode 100644
index aabe348..0000000
--- a/ffmpeg/libavcodec/indeo2.c
+++ /dev/null
@@ -1,258 +0,0 @@
-/*
- * Intel Indeo 2 codec
- * Copyright (c) 2005 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
- * Intel Indeo 2 decoder.
- */
-
-#define BITSTREAM_READER_LE
-#include "libavutil/attributes.h"
-#include "avcodec.h"
-#include "get_bits.h"
-#include "indeo2data.h"
-#include "internal.h"
-#include "mathops.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)
-{
- return get_vlc2(gb, ir2_vlc.table, CODE_VLC_BITS, 1) + 1;
-}
-
-static int 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;
-
- if (width & 1)
- return AVERROR_INVALIDDATA;
-
- /* 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 -= 0x7F;
- if (out + c*2 > width)
- return AVERROR_INVALIDDATA;
- 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 -= 0x7F;
- if (out + c*2 > width)
- return AVERROR_INVALIDDATA;
- 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);
- t = av_clip_uint8(t);
- dst[out] = t;
- out++;
- t = dst[out - stride] + (table[(c * 2) + 1] - 128);
- t = av_clip_uint8(t);
- dst[out] = t;
- out++;
- }
- }
- dst += stride;
- }
- return 0;
-}
-
-static int 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;
-
- if (width & 1)
- return AVERROR_INVALIDDATA;
-
- 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 -= 0x7F;
- out += c * 2;
- } else { /* add two deltas from table */
- t = dst[out] + (((table[c * 2] - 128)*3) >> 2);
- t = av_clip_uint8(t);
- dst[out] = t;
- out++;
- t = dst[out] + (((table[(c * 2) + 1] - 128)*3) >> 2);
- t = av_clip_uint8(t);
- dst[out] = t;
- out++;
- }
- }
- dst += stride;
- }
- return 0;
-}
-
-static int ir2_decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame,
- AVPacket *avpkt)
-{
- Ir2Context * const s = avctx->priv_data;
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- AVFrame *picture = data;
- AVFrame * const p = s->picture;
- int start, ret;
-
- if ((ret = ff_reget_buffer(avctx, p)) < 0)
- return ret;
-
- start = 48; /* hardcoded for now */
-
- if (start >= buf_size) {
- av_log(s->avctx, AV_LOG_ERROR, "input buffer size too small (%d)\n", buf_size);
- return AVERROR_INVALIDDATA;
- }
-
- s->decode_delta = buf[18];
-
- /* decide whether frame uses deltas or not */
-#ifndef BITSTREAM_READER_LE
- for (i = 0; i < buf_size; i++)
- buf[i] = ff_reverse[buf[i]];
-#endif
-
- init_get_bits(&s->gb, buf + start, (buf_size - start) * 8);
-
- if (s->decode_delta) { /* intraframe */
- if ((ret = ir2_decode_plane(s, avctx->width, avctx->height,
- p->data[0], p->linesize[0],
- ir2_luma_table)) < 0)
- return ret;
-
- /* swapped U and V */
- if ((ret = ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2,
- p->data[2], p->linesize[2],
- ir2_luma_table)) < 0)
- return ret;
- if ((ret = ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2,
- p->data[1], p->linesize[1],
- ir2_luma_table)) < 0)
- return ret;
- } else { /* interframe */
- if ((ret = ir2_decode_plane_inter(s, avctx->width, avctx->height,
- p->data[0], p->linesize[0],
- ir2_luma_table)) < 0)
- return ret;
- /* swapped U and V */
- if ((ret = ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2,
- p->data[2], p->linesize[2],
- ir2_luma_table)) < 0)
- return ret;
- if ((ret = ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2,
- p->data[1], p->linesize[1],
- ir2_luma_table)) < 0)
- return ret;
- }
-
- if ((ret = av_frame_ref(picture, p)) < 0)
- return ret;
-
- *got_frame = 1;
-
- return buf_size;
-}
-
-static av_cold int ir2_decode_init(AVCodecContext *avctx)
-{
- Ir2Context * const ic = avctx->priv_data;
- static VLC_TYPE vlc_tables[1 << CODE_VLC_BITS][2];
-
- ic->avctx = avctx;
-
- avctx->pix_fmt= AV_PIX_FMT_YUV410P;
-
- ic->picture = av_frame_alloc();
- if (!ic->picture)
- return AVERROR(ENOMEM);
-
- ir2_vlc.table = vlc_tables;
- ir2_vlc.table_allocated = 1 << CODE_VLC_BITS;
-#ifdef BITSTREAM_READER_LE
- init_vlc(&ir2_vlc, CODE_VLC_BITS, IR2_CODES,
- &ir2_codes[0][1], 4, 2,
- &ir2_codes[0][0], 4, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
-#else
- init_vlc(&ir2_vlc, CODE_VLC_BITS, IR2_CODES,
- &ir2_codes[0][1], 4, 2,
- &ir2_codes[0][0], 4, 2, INIT_VLC_USE_NEW_STATIC);
-#endif
-
- return 0;
-}
-
-static av_cold int ir2_decode_end(AVCodecContext *avctx)
-{
- Ir2Context * const ic = avctx->priv_data;
-
- av_frame_free(&ic->picture);
-
- return 0;
-}
-
-AVCodec ff_indeo2_decoder = {
- .name = "indeo2",
- .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 2"),
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_INDEO2,
- .priv_data_size = sizeof(Ir2Context),
- .init = ir2_decode_init,
- .close = ir2_decode_end,
- .decode = ir2_decode_frame,
- .capabilities = CODEC_CAP_DR1,
-};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 19:13:39 +0000