2003-07-27 22:20:31 +02:00
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/*
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* Cirrus Logic AccuPak (CLJR) codec
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* Copyright (c) 2003 Alex Beregszaszi
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*
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2011-03-18 18:35:10 +01:00
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* This file is part of Libav.
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2006-10-07 17:30:46 +02:00
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*
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2011-03-18 18:35:10 +01:00
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* Libav is free software; you can redistribute it and/or
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2003-07-27 22:20:31 +02:00
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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 17:30:46 +02:00
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* version 2.1 of the License, or (at your option) any later version.
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2003-07-27 22:20:31 +02:00
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*
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2011-03-18 18:35:10 +01:00
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* Libav is distributed in the hope that it will be useful,
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2003-07-27 22:20:31 +02:00
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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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2011-03-18 18:35:10 +01:00
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* License along with Libav; if not, write to the Free Software
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2006-01-12 23:43:26 +01:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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2003-07-27 22:20:31 +02:00
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*/
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2005-12-17 19:14:38 +01:00
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2003-07-27 22:20:31 +02:00
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/**
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2010-04-20 16:45:34 +02:00
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* @file
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2003-07-27 22:20:31 +02:00
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* Cirrus Logic AccuPak codec.
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*/
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2005-12-17 19:14:38 +01:00
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2003-07-27 22:20:31 +02:00
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#include "avcodec.h"
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2008-03-05 01:43:11 +01:00
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#include "dsputil.h"
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2009-04-13 18:20:26 +02:00
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#include "get_bits.h"
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2003-07-27 22:20:31 +02:00
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2008-09-03 14:43:18 +02:00
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/* Disable the encoder. */
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#undef CONFIG_CLJR_ENCODER
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2009-01-14 00:44:16 +01:00
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#define CONFIG_CLJR_ENCODER 0
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2008-09-03 14:43:18 +02:00
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2003-07-27 22:20:31 +02:00
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typedef struct CLJRContext{
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AVCodecContext *avctx;
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AVFrame picture;
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} CLJRContext;
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2005-12-17 19:14:38 +01:00
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static int decode_frame(AVCodecContext *avctx,
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2003-07-27 22:20:31 +02:00
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void *data, int *data_size,
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2009-04-07 17:59:50 +02:00
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AVPacket *avpkt)
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2003-07-27 22:20:31 +02:00
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{
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2009-04-07 17:59:50 +02:00
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const uint8_t *buf = avpkt->data;
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int buf_size = avpkt->size;
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2003-07-27 22:20:31 +02:00
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CLJRContext * const a = avctx->priv_data;
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2011-12-06 18:45:37 +01:00
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GetBitContext gb;
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2003-07-27 22:20:31 +02:00
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AVFrame *picture = data;
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AVFrame * const p= (AVFrame*)&a->picture;
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2003-08-25 00:08:22 +02:00
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int x, y;
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2003-07-27 22:20:31 +02:00
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if(p->data[0])
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avctx->release_buffer(avctx, p);
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2011-01-07 22:54:52 +01:00
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if(buf_size/avctx->height < avctx->width) {
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av_log(avctx, AV_LOG_ERROR, "Resolution larger than buffer size. Invalid header?\n");
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return -1;
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}
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2003-07-27 22:20:31 +02:00
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p->reference= 0;
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if(avctx->get_buffer(avctx, p) < 0){
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2003-11-03 14:26:22 +01:00
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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2003-07-27 22:20:31 +02:00
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return -1;
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}
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2011-04-29 18:53:57 +02:00
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p->pict_type= AV_PICTURE_TYPE_I;
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2003-07-27 22:20:31 +02:00
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p->key_frame= 1;
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2011-12-06 18:45:37 +01:00
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init_get_bits(&gb, buf, buf_size * 8);
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2003-07-27 22:20:31 +02:00
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for(y=0; y<avctx->height; y++){
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uint8_t *luma= &a->picture.data[0][ y*a->picture.linesize[0] ];
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2003-07-27 22:45:09 +02:00
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uint8_t *cb= &a->picture.data[1][ y*a->picture.linesize[1] ];
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uint8_t *cr= &a->picture.data[2][ y*a->picture.linesize[2] ];
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2003-07-27 22:20:31 +02:00
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for(x=0; x<avctx->width; x+=4){
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2011-12-06 18:45:37 +01:00
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luma[3] = get_bits(&gb, 5) << 3;
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luma[2] = get_bits(&gb, 5) << 3;
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luma[1] = get_bits(&gb, 5) << 3;
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luma[0] = get_bits(&gb, 5) << 3;
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2005-12-22 02:10:11 +01:00
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luma+= 4;
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2011-12-06 18:45:37 +01:00
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*(cb++) = get_bits(&gb, 6) << 2;
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*(cr++) = get_bits(&gb, 6) << 2;
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2003-07-27 22:20:31 +02:00
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}
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}
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*picture= *(AVFrame*)&a->picture;
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*data_size = sizeof(AVPicture);
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emms_c();
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2005-12-17 19:14:38 +01:00
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2003-07-27 22:20:31 +02:00
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return buf_size;
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}
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2009-01-14 00:44:16 +01:00
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#if CONFIG_CLJR_ENCODER
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2003-07-27 22:20:31 +02:00
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static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
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CLJRContext * const a = avctx->priv_data;
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AVFrame *pict = data;
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AVFrame * const p= (AVFrame*)&a->picture;
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int size;
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*p = *pict;
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2011-04-29 18:53:57 +02:00
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p->pict_type= AV_PICTURE_TYPE_I;
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2003-07-27 22:20:31 +02:00
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p->key_frame= 1;
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emms_c();
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2005-12-17 19:14:38 +01:00
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2011-10-17 10:10:42 +02:00
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avpriv_align_put_bits(&a->pb);
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2003-07-27 22:20:31 +02:00
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while(get_bit_count(&a->pb)&31)
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put_bits(&a->pb, 8, 0);
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2005-12-17 19:14:38 +01:00
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2003-07-27 22:20:31 +02:00
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size= get_bit_count(&a->pb)/32;
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2005-12-17 19:14:38 +01:00
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2003-07-27 22:20:31 +02:00
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return size*4;
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}
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#endif
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2008-03-21 04:11:20 +01:00
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static av_cold void common_init(AVCodecContext *avctx){
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2003-07-27 22:20:31 +02:00
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CLJRContext * const a = avctx->priv_data;
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avctx->coded_frame= (AVFrame*)&a->picture;
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a->avctx= avctx;
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}
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2008-03-21 04:11:20 +01:00
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static av_cold int decode_init(AVCodecContext *avctx){
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2003-08-25 00:08:22 +02:00
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2003-07-27 22:20:31 +02:00
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common_init(avctx);
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2005-12-17 19:14:38 +01:00
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2003-07-27 22:45:09 +02:00
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avctx->pix_fmt= PIX_FMT_YUV411P;
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2003-07-27 22:20:31 +02:00
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return 0;
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}
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2011-12-06 05:14:55 +01:00
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static av_cold int decode_end(AVCodecContext *avctx) {
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CLJRContext *a = avctx->priv_data;
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if (a->picture.data[0]);
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avctx->release_buffer(avctx, &a->picture);
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}
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2009-01-14 00:44:16 +01:00
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#if CONFIG_CLJR_ENCODER
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2008-03-21 04:11:20 +01:00
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static av_cold int encode_init(AVCodecContext *avctx){
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2003-08-25 00:08:22 +02:00
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2003-07-27 22:20:31 +02:00
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common_init(avctx);
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2005-12-17 19:14:38 +01:00
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2003-07-27 22:20:31 +02:00
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return 0;
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}
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2005-02-24 20:08:50 +01:00
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#endif
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2003-07-27 22:20:31 +02:00
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2011-01-25 22:40:11 +01:00
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AVCodec ff_cljr_decoder = {
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2011-07-17 12:54:31 +02:00
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.name = "cljr",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = CODEC_ID_CLJR,
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.priv_data_size = sizeof(CLJRContext),
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.init = decode_init,
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2011-12-06 05:14:55 +01:00
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.close = decode_end,
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2011-07-17 12:54:31 +02:00
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.decode = decode_frame,
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.capabilities = CODEC_CAP_DR1,
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2008-06-12 23:50:13 +02:00
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.long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
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2003-07-27 22:20:31 +02:00
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};
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2008-09-03 14:43:18 +02:00
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2009-01-14 00:44:16 +01:00
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#if CONFIG_CLJR_ENCODER
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2011-01-25 22:40:11 +01:00
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AVCodec ff_cljr_encoder = {
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2011-07-17 12:54:31 +02:00
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.name = "cljr",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = CODEC_ID_CLJR,
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.priv_data_size = sizeof(CLJRContext),
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.init = encode_init,
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.encode = encode_frame,
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2008-06-12 23:50:13 +02:00
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.long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
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2003-07-27 22:20:31 +02:00
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};
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2008-09-03 14:33:21 +02:00
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#endif
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