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Diffstat (limited to 'src/libffmpeg/libavcodec/loco.c')
-rw-r--r--src/libffmpeg/libavcodec/loco.c287
1 files changed, 0 insertions, 287 deletions
diff --git a/src/libffmpeg/libavcodec/loco.c b/src/libffmpeg/libavcodec/loco.c
deleted file mode 100644
index b1f99f425..000000000
--- a/src/libffmpeg/libavcodec/loco.c
+++ /dev/null
@@ -1,287 +0,0 @@
-/*
- * LOCO 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 loco.c
- * LOCO codec.
- */
-
-#include "avcodec.h"
-#include "common.h"
-#include "bitstream.h"
-#include "golomb.h"
-
-enum LOCO_MODE {LOCO_UNKN=0, LOCO_CYUY2=-1, LOCO_CRGB=-2, LOCO_CRGBA=-3, LOCO_CYV12=-4,
- LOCO_YUY2=1, LOCO_UYVY=2, LOCO_RGB=3, LOCO_RGBA=4, LOCO_YV12=5};
-
-typedef struct LOCOContext{
- AVCodecContext *avctx;
- AVFrame pic;
- int lossy;
- int mode;
-} LOCOContext;
-
-typedef struct RICEContext{
- GetBitContext gb;
- int save, run, run2; /* internal rice decoder state */
- int sum, count; /* sum and count for getting rice parameter */
- int lossy;
-}RICEContext;
-
-static int loco_get_rice_param(RICEContext *r)
-{
- int cnt = 0;
- int val = r->count;
-
- while(r->sum > val && cnt < 9) {
- val <<= 1;
- cnt++;
- }
-
- return cnt;
-}
-
-static inline void loco_update_rice_param(RICEContext *r, int val)
-{
- r->sum += val;
- r->count++;
-
- if(r->count == 16) {
- r->sum >>= 1;
- r->count >>= 1;
- }
-}
-
-static inline int loco_get_rice(RICEContext *r)
-{
- int v;
- if (r->run > 0) { /* we have zero run */
- r->run--;
- loco_update_rice_param(r, 0);
- return 0;
- }
- v = get_ur_golomb_jpegls(&r->gb, loco_get_rice_param(r), INT_MAX, 0);
- loco_update_rice_param(r, (v+1)>>1);
- if (!v) {
- if (r->save >= 0) {
- r->run = get_ur_golomb_jpegls(&r->gb, 2, INT_MAX, 0);
- if(r->run > 1)
- r->save += r->run + 1;
- else
- r->save -= 3;
- }
- else
- r->run2++;
- } else {
- v = ((v>>1) + r->lossy) ^ -(v&1);
- if (r->run2 > 0) {
- if (r->run2 > 2)
- r->save += r->run2;
- else
- r->save -= 3;
- r->run2 = 0;
- }
- }
-
- return v;
-}
-
-/* LOCO main predictor - LOCO-I/JPEG-LS predictor */
-static inline int loco_predict(uint8_t* data, int stride, int step)
-{
- int a, b, c;
-
- a = data[-stride];
- b = data[-step];
- c = data[-stride - step];
-
- return mid_pred(a, a + b - c, b);
-}
-
-static int loco_decode_plane(LOCOContext *l, uint8_t *data, int width, int height,
- int stride, uint8_t *buf, int buf_size, int step)
-{
- RICEContext rc;
- int val;
- int i, j;
-
- init_get_bits(&rc.gb, buf, buf_size*8);
- rc.save = 0;
- rc.run = 0;
- rc.run2 = 0;
- rc.lossy = l->lossy;
-
- rc.sum = 8;
- rc.count = 1;
-
- /* restore top left pixel */
- val = loco_get_rice(&rc);
- data[0] = 128 + val;
- /* restore top line */
- for (i = 1; i < width; i++) {
- val = loco_get_rice(&rc);
- data[i * step] = data[i * step - step] + val;
- }
- data += stride;
- for (j = 1; j < height; j++) {
- /* restore left column */
- val = loco_get_rice(&rc);
- data[0] = data[-stride] + val;
- /* restore all other pixels */
- for (i = 1; i < width; i++) {
- val = loco_get_rice(&rc);
- data[i * step] = loco_predict(&data[i * step], stride, step) + val;
- }
- data += stride;
- }
-
- return ((get_bits_count(&rc.gb) + 7) >> 3);
-}
-
-static int decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
-{
- LOCOContext * const l = avctx->priv_data;
- AVFrame * const p= (AVFrame*)&l->pic;
- int decoded;
-
- if(p->data[0])
- avctx->release_buffer(avctx, p);
-
- p->reference = 0;
- if(avctx->get_buffer(avctx, p) < 0){
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
- p->key_frame = 1;
-
- switch(l->mode) {
- case LOCO_CYUY2: case LOCO_YUY2: case LOCO_UYVY:
- decoded = loco_decode_plane(l, p->data[0], avctx->width, avctx->height,
- p->linesize[0], buf, buf_size, 1);
- buf += decoded; buf_size -= decoded;
- decoded = loco_decode_plane(l, p->data[1], avctx->width / 2, avctx->height,
- p->linesize[1], buf, buf_size, 1);
- buf += decoded; buf_size -= decoded;
- decoded = loco_decode_plane(l, p->data[2], avctx->width / 2, avctx->height,
- p->linesize[2], buf, buf_size, 1);
- break;
- case LOCO_CYV12: case LOCO_YV12:
- decoded = loco_decode_plane(l, p->data[0], avctx->width, avctx->height,
- p->linesize[0], buf, buf_size, 1);
- buf += decoded; buf_size -= decoded;
- decoded = loco_decode_plane(l, p->data[2], avctx->width / 2, avctx->height / 2,
- p->linesize[2], buf, buf_size, 1);
- buf += decoded; buf_size -= decoded;
- decoded = loco_decode_plane(l, p->data[1], avctx->width / 2, avctx->height / 2,
- p->linesize[1], buf, buf_size, 1);
- break;
- case LOCO_CRGB: case LOCO_RGB:
- decoded = loco_decode_plane(l, p->data[0] + p->linesize[0]*(avctx->height-1), avctx->width, avctx->height,
- -p->linesize[0], buf, buf_size, 3);
- buf += decoded; buf_size -= decoded;
- decoded = loco_decode_plane(l, p->data[0] + p->linesize[0]*(avctx->height-1) + 1, avctx->width, avctx->height,
- -p->linesize[0], buf, buf_size, 3);
- buf += decoded; buf_size -= decoded;
- decoded = loco_decode_plane(l, p->data[0] + p->linesize[0]*(avctx->height-1) + 2, avctx->width, avctx->height,
- -p->linesize[0], buf, buf_size, 3);
- break;
- case LOCO_RGBA:
- decoded = loco_decode_plane(l, p->data[0], avctx->width, avctx->height,
- p->linesize[0], buf, buf_size, 4);
- buf += decoded; buf_size -= decoded;
- decoded = loco_decode_plane(l, p->data[0] + 1, avctx->width, avctx->height,
- p->linesize[0], buf, buf_size, 4);
- buf += decoded; buf_size -= decoded;
- decoded = loco_decode_plane(l, p->data[0] + 2, avctx->width, avctx->height,
- p->linesize[0], buf, buf_size, 4);
- buf += decoded; buf_size -= decoded;
- decoded = loco_decode_plane(l, p->data[0] + 3, avctx->width, avctx->height,
- p->linesize[0], buf, buf_size, 4);
- break;
- }
-
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = l->pic;
-
- return buf_size;
-}
-
-static int decode_init(AVCodecContext *avctx){
- LOCOContext * const l = avctx->priv_data;
- int version;
-
- l->avctx = avctx;
- if (avctx->extradata_size < 12) {
- av_log(avctx, AV_LOG_ERROR, "Extradata size must be >= 12 instead of %i\n",
- avctx->extradata_size);
- return -1;
- }
- version = AV_RL32(avctx->extradata);
- switch(version) {
- case 1:
- l->lossy = 0;
- break;
- case 2:
- l->lossy = AV_RL32(avctx->extradata + 8);
- break;
- default:
- l->lossy = AV_RL32(avctx->extradata + 8);
- av_log(avctx, AV_LOG_INFO, "This is LOCO codec version %i, please upload file for study\n", version);
- }
-
- l->mode = AV_RL32(avctx->extradata + 4);
- switch(l->mode) {
- case LOCO_CYUY2: case LOCO_YUY2: case LOCO_UYVY:
- avctx->pix_fmt = PIX_FMT_YUV422P;
- break;
- case LOCO_CRGB: case LOCO_RGB:
- avctx->pix_fmt = PIX_FMT_BGR24;
- break;
- case LOCO_CYV12: case LOCO_YV12:
- avctx->pix_fmt = PIX_FMT_YUV420P;
- break;
- case LOCO_CRGBA: case LOCO_RGBA:
- avctx->pix_fmt = PIX_FMT_RGBA32;
- break;
- default:
- av_log(avctx, AV_LOG_INFO, "Unknown colorspace, index = %i\n", l->mode);
- return -1;
- }
- if(avctx->debug & FF_DEBUG_PICT_INFO)
- av_log(avctx, AV_LOG_INFO, "lossy:%i, version:%i, mode: %i\n", l->lossy, version, l->mode);
-
- return 0;
-}
-
-AVCodec loco_decoder = {
- "loco",
- CODEC_TYPE_VIDEO,
- CODEC_ID_LOCO,
- sizeof(LOCOContext),
- decode_init,
- NULL,
- NULL,
- decode_frame,
- CODEC_CAP_DR1,
-};
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-25 18:05:47 +0000