2003-07-24 15:18:46 +03:00
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/*
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* ATI VCR1 codec
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* Copyright (c) 2003 Michael Niedermayer
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*
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2006-10-07 18:30:46 +03:00
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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2003-07-24 15:18:46 +03:00
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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2006-10-07 18:30:46 +03:00
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* version 2.1 of the License, or (at your option) any later version.
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2003-07-24 15:18:46 +03:00
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*
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2006-10-07 18:30:46 +03:00
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* FFmpeg is distributed in the hope that it will be useful,
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2003-07-24 15:18:46 +03:00
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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2006-10-07 18:30:46 +03:00
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* License along with FFmpeg; if not, write to the Free Software
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2006-01-13 00:43:26 +02:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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2003-07-24 15:18:46 +03:00
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*/
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2005-12-17 20:14:38 +02:00
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2003-07-24 15:18:46 +03:00
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/**
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2010-04-20 17:45:34 +03:00
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* @file
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2012-04-08 14:05:17 +03:00
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* ATI VCR1 codec
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2003-07-24 15:18:46 +03:00
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*/
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2005-12-17 20:14:38 +02:00
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2003-07-24 15:18:46 +03:00
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#include "avcodec.h"
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2022-03-16 19:18:28 +02:00
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#include "codec_internal.h"
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2012-11-10 15:22:56 +03:00
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#include "internal.h"
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2013-09-03 14:36:22 +03:00
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#include "libavutil/avassert.h"
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2012-08-06 16:49:32 +03:00
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#include "libavutil/internal.h"
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2003-07-24 15:18:46 +03:00
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2012-04-08 14:05:17 +03:00
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typedef struct VCR1Context {
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2003-07-24 15:18:46 +03:00
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int delta[16];
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int offset[4];
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} VCR1Context;
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2012-05-14 13:36:45 +03:00
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static av_cold int vcr1_decode_init(AVCodecContext *avctx)
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2012-04-09 19:11:35 +03:00
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{
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2012-10-06 13:10:34 +03:00
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avctx->pix_fmt = AV_PIX_FMT_YUV410P;
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2012-04-09 19:11:35 +03:00
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2012-11-17 22:17:22 +03:00
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if (avctx->width % 8 || avctx->height%4) {
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2013-09-03 14:17:20 +03:00
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avpriv_request_sample(avctx, "odd dimensions (%d x %d) support", avctx->width, avctx->height);
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2013-08-24 22:30:46 +03:00
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return AVERROR_INVALIDDATA;
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2012-11-17 22:17:22 +03:00
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}
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2013-08-24 22:30:46 +03:00
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2012-04-09 19:11:35 +03:00
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return 0;
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}
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2022-03-30 21:33:24 +02:00
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static int vcr1_decode_frame(AVCodecContext *avctx, AVFrame *p,
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2012-11-13 21:35:22 +03:00
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int *got_frame, AVPacket *avpkt)
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2003-07-24 15:18:46 +03:00
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{
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2012-04-08 14:05:17 +03:00
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VCR1Context *const a = avctx->priv_data;
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2013-09-03 16:47:21 +03:00
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const uint8_t *bytestream = avpkt->data;
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2013-09-03 16:46:56 +03:00
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const uint8_t *bytestream_end = bytestream + avpkt->size;
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2012-11-19 20:03:31 +03:00
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int i, x, y, ret;
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2003-07-24 15:18:46 +03:00
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2013-10-22 15:40:49 +03:00
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if(avpkt->size < 32 + avctx->height + avctx->width*avctx->height*5/8){
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2013-10-22 16:01:54 +03:00
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av_log(avctx, AV_LOG_ERROR, "Insufficient input data. %d < %d\n", avpkt->size , 32 + avctx->height + avctx->width*avctx->height*5/8);
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2011-12-28 21:05:16 +03:00
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return AVERROR(EINVAL);
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}
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lavc: factorize ff_{thread_,re,}get_buffer error messages.
Coccinelle profile used:
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expression r, ctx, f, loglevel, str, flags;
@@
-if ((r = ff_get_buffer(ctx, f, flags)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_get_buffer(ctx, f, flags)) < 0)
+ return r;
@@
expression r, ctx, f, loglevel, str;
@@
-if ((r = ff_reget_buffer(ctx, f)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_reget_buffer(ctx, f)) < 0)
+ return r;
@@
expression r, ctx, f, loglevel, str, flags;
@@
-if ((r = ff_thread_get_buffer(ctx, f, flags)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_thread_get_buffer(ctx, f, flags)) < 0)
+ return r;
...along with some manual patches for the remaining ones.
2013-03-12 10:41:53 +03:00
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if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
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2012-11-19 20:03:31 +03:00
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return ret;
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2012-04-08 14:05:17 +03:00
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p->pict_type = AV_PICTURE_TYPE_I;
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p->key_frame = 1;
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2003-07-24 15:18:46 +03:00
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2012-04-08 14:05:17 +03:00
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for (i = 0; i < 16; i++) {
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a->delta[i] = *bytestream++;
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2003-07-24 15:18:46 +03:00
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bytestream++;
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}
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2005-12-17 20:14:38 +02:00
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2012-04-08 14:05:17 +03:00
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for (y = 0; y < avctx->height; y++) {
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2003-07-24 15:18:46 +03:00
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int offset;
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2012-11-21 23:34:46 +03:00
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uint8_t *luma = &p->data[0][y * p->linesize[0]];
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2003-07-24 15:18:46 +03:00
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2012-04-08 14:05:17 +03:00
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if ((y & 3) == 0) {
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2012-11-21 23:34:46 +03:00
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uint8_t *cb = &p->data[1][(y >> 2) * p->linesize[1]];
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uint8_t *cr = &p->data[2][(y >> 2) * p->linesize[2]];
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2003-07-24 15:18:46 +03:00
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2013-09-03 16:46:56 +03:00
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av_assert0 (bytestream_end - bytestream >= 4 + avctx->width);
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2013-08-24 22:30:46 +03:00
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2012-04-08 14:05:17 +03:00
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for (i = 0; i < 4; i++)
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a->offset[i] = *bytestream++;
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2003-07-24 15:18:46 +03:00
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2012-04-08 14:05:17 +03:00
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offset = a->offset[0] - a->delta[bytestream[2] & 0xF];
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for (x = 0; x < avctx->width; x += 4) {
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luma[0] = offset += a->delta[bytestream[2] & 0xF];
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luma[1] = offset += a->delta[bytestream[2] >> 4];
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luma[2] = offset += a->delta[bytestream[0] & 0xF];
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luma[3] = offset += a->delta[bytestream[0] >> 4];
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luma += 4;
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2005-12-17 20:14:38 +02:00
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2012-04-08 14:05:17 +03:00
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*cb++ = bytestream[3];
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*cr++ = bytestream[1];
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2005-12-17 20:14:38 +02:00
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2012-04-08 14:05:17 +03:00
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bytestream += 4;
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2003-07-24 15:18:46 +03:00
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}
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2012-04-08 14:05:17 +03:00
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} else {
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2013-09-03 16:46:56 +03:00
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av_assert0 (bytestream_end - bytestream >= avctx->width / 2);
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2013-08-24 22:30:46 +03:00
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2012-04-08 14:05:17 +03:00
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offset = a->offset[y & 3] - a->delta[bytestream[2] & 0xF];
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for (x = 0; x < avctx->width; x += 8) {
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luma[0] = offset += a->delta[bytestream[2] & 0xF];
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luma[1] = offset += a->delta[bytestream[2] >> 4];
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luma[2] = offset += a->delta[bytestream[3] & 0xF];
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luma[3] = offset += a->delta[bytestream[3] >> 4];
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luma[4] = offset += a->delta[bytestream[0] & 0xF];
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luma[5] = offset += a->delta[bytestream[0] >> 4];
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luma[6] = offset += a->delta[bytestream[1] & 0xF];
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luma[7] = offset += a->delta[bytestream[1] >> 4];
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luma += 8;
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bytestream += 4;
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2003-07-24 15:18:46 +03:00
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}
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}
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}
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2012-11-13 21:35:22 +03:00
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*got_frame = 1;
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2003-07-24 15:18:46 +03:00
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2013-09-03 16:44:37 +03:00
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return bytestream - avpkt->data;
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2003-07-24 15:18:46 +03:00
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}
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2022-03-16 22:09:54 +02:00
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const FFCodec ff_vcr1_decoder = {
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.p.name = "vcr1",
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.p.long_name = NULL_IF_CONFIG_SMALL("ATI VCR1"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_VCR1,
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2011-07-17 13:54:31 +03:00
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.priv_data_size = sizeof(VCR1Context),
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2012-05-14 13:36:45 +03:00
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.init = vcr1_decode_init,
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2022-03-30 23:28:24 +02:00
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FF_CODEC_DECODE_CB(vcr1_decode_frame),
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2022-03-16 22:09:54 +02:00
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.p.capabilities = AV_CODEC_CAP_DR1,
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2003-07-24 15:18:46 +03:00
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};
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