2003-07-27 23:20:31 +03:00
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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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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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2003-07-27 23:20:31 +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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2003-07-27 23:20:31 +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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2003-07-27 23:20:31 +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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2003-07-27 23:20:31 +03:00
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*/
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2005-12-17 20:14:38 +02:00
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2003-07-27 23:20:31 +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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2003-07-27 23:20:31 +03:00
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* Cirrus Logic AccuPak codec.
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*/
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2005-12-17 20:14:38 +02:00
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2003-07-27 23:20:31 +03:00
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#include "avcodec.h"
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2011-12-09 08:01:15 +03:00
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#include "libavutil/opt.h"
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2009-04-13 19:20:26 +03:00
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#include "get_bits.h"
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2012-02-11 22:39:12 +03:00
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#include "internal.h"
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2011-12-08 03:05:23 +03:00
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#include "put_bits.h"
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2003-07-27 23:20:31 +03:00
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2011-12-08 17:48:12 +03:00
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#if CONFIG_CLJR_DECODER
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2005-12-17 20:14:38 +02:00
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static int decode_frame(AVCodecContext *avctx,
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2012-11-13 21:35:22 +03:00
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void *data, int *got_frame,
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2009-04-07 18:59:50 +03:00
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AVPacket *avpkt)
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2003-07-27 23:20:31 +03:00
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{
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2009-04-07 18:59:50 +03:00
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const uint8_t *buf = avpkt->data;
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2011-12-08 17:51:38 +03:00
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int buf_size = avpkt->size;
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2011-12-06 20:45:37 +03:00
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GetBitContext gb;
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2012-11-21 23:34:46 +03:00
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AVFrame * const p = data;
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2012-11-05 23:40:43 +03:00
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int x, y, ret;
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2003-07-27 23:20:31 +03:00
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2011-12-16 02:20:21 +03:00
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if (avctx->height <= 0 || avctx->width <= 0) {
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av_log(avctx, AV_LOG_ERROR, "Invalid width or height\n");
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return AVERROR_INVALIDDATA;
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}
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2011-12-08 17:51:38 +03:00
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if (buf_size / avctx->height < avctx->width) {
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av_log(avctx, AV_LOG_ERROR,
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"Resolution larger than buffer size. Invalid header?\n");
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2011-12-08 17:53:27 +03:00
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return AVERROR_INVALIDDATA;
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2011-01-07 23:54:52 +02:00
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}
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2012-11-21 23:34:46 +03:00
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if ((ret = ff_get_buffer(avctx, p, 0)) < 0) {
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2003-11-03 15:26:22 +02:00
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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2012-11-05 23:40:43 +03:00
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return ret;
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2003-07-27 23:20:31 +03:00
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}
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2011-12-08 17:51:38 +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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2003-07-27 23:20:31 +03:00
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2011-12-06 20:45:37 +03:00
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init_get_bits(&gb, buf, buf_size * 8);
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2003-07-27 23:20:31 +03:00
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2011-12-08 17:51:38 +03:00
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for (y = 0; y < avctx->height; y++) {
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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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uint8_t *cb = &p->data[1][y * p->linesize[1]];
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uint8_t *cr = &p->data[2][y * p->linesize[2]];
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2011-12-08 17:51:38 +03:00
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for (x = 0; x < avctx->width; x += 4) {
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2011-12-28 23:46:57 +03:00
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luma[3] = (get_bits(&gb, 5)*33) >> 2;
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luma[2] = (get_bits(&gb, 5)*33) >> 2;
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luma[1] = (get_bits(&gb, 5)*33) >> 2;
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luma[0] = (get_bits(&gb, 5)*33) >> 2;
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2011-12-08 17:51:38 +03:00
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luma += 4;
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2011-12-06 20:45:37 +03:00
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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 23:20:31 +03:00
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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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2003-07-27 23:20:31 +03:00
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return buf_size;
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}
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2011-12-08 17:48:12 +03:00
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static av_cold int decode_init(AVCodecContext *avctx)
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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_YUV411P;
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2003-07-27 23:20:31 +03:00
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return 0;
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}
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2011-01-25 23:40:11 +02:00
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AVCodec ff_cljr_decoder = {
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2011-07-17 13:54:31 +03:00
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.name = "cljr",
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.type = AVMEDIA_TYPE_VIDEO,
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2012-08-05 12:11:04 +03:00
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.id = AV_CODEC_ID_CLJR,
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2011-07-17 13:54:31 +03:00
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.init = decode_init,
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.decode = decode_frame,
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.capabilities = CODEC_CAP_DR1,
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2011-12-08 17:48:12 +03:00
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.long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
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2003-07-27 23:20:31 +03:00
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};
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2011-12-08 17:48:12 +03:00
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#endif
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2008-09-03 15:43:18 +03:00
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2009-01-14 01:44:16 +02:00
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#if CONFIG_CLJR_ENCODER
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2012-11-21 23:34:46 +03:00
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typedef struct CLJRContext {
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2013-03-12 05:20:18 +03:00
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AVClass *avclass;
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2012-11-21 23:34:46 +03:00
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AVFrame picture;
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2013-03-12 05:20:18 +03:00
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int dither_type;
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2012-11-21 23:34:46 +03:00
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} CLJRContext;
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static av_cold int encode_init(AVCodecContext *avctx)
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{
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CLJRContext * const a = avctx->priv_data;
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avctx->coded_frame = &a->picture;
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return 0;
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}
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2012-02-11 22:39:12 +03:00
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static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *p, int *got_packet)
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2011-12-08 17:51:38 +03:00
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{
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2011-12-09 08:01:15 +03:00
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CLJRContext *a = avctx->priv_data;
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2011-12-08 03:05:23 +03:00
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PutBitContext pb;
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2012-02-11 22:39:12 +03:00
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int x, y, ret;
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2011-12-09 03:11:06 +03:00
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uint32_t dither= avctx->frame_number;
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2011-12-09 20:32:29 +03:00
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static const uint32_t ordered_dither[2][2] =
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{
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{ 0x10400000, 0x104F0000 },
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{ 0xCB2A0000, 0xCB250000 },
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};
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2003-07-27 23:20:31 +03:00
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2012-03-22 23:22:39 +03:00
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if ((ret = ff_alloc_packet2(avctx, pkt, 32*avctx->height*avctx->width/4)) < 0)
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2012-02-11 22:39:12 +03:00
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return ret;
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2003-07-27 23:20:31 +03:00
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2012-02-11 22:37:41 +03:00
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avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
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avctx->coded_frame->key_frame = 1;
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2003-07-27 23:20:31 +03:00
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2012-02-11 22:39:12 +03:00
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init_put_bits(&pb, pkt->data, pkt->size);
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2011-12-08 03:05:23 +03:00
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for (y = 0; y < avctx->height; y++) {
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uint8_t *luma = &p->data[0][y * p->linesize[0]];
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uint8_t *cb = &p->data[1][y * p->linesize[1]];
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uint8_t *cr = &p->data[2][y * p->linesize[2]];
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for (x = 0; x < avctx->width; x += 4) {
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2011-12-09 08:01:15 +03:00
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switch (a->dither_type) {
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case 0: dither = 0x492A0000; break;
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case 1: dither = dither * 1664525 + 1013904223; break;
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2011-12-09 20:32:29 +03:00
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case 2: dither = ordered_dither[ y&1 ][ (x>>2)&1 ];break;
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2011-12-09 08:01:15 +03:00
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}
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2011-12-28 23:29:03 +03:00
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put_bits(&pb, 5, (249*(luma[3] + (dither>>29) )) >> 11);
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put_bits(&pb, 5, (249*(luma[2] + ((dither>>26)&7))) >> 11);
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put_bits(&pb, 5, (249*(luma[1] + ((dither>>23)&7))) >> 11);
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put_bits(&pb, 5, (249*(luma[0] + ((dither>>20)&7))) >> 11);
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2011-12-08 03:05:23 +03:00
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luma += 4;
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2011-12-28 23:29:03 +03:00
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put_bits(&pb, 6, (253*(*(cb++) + ((dither>>18)&3))) >> 10);
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put_bits(&pb, 6, (253*(*(cr++) + ((dither>>16)&3))) >> 10);
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2011-12-08 03:05:23 +03:00
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}
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}
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2005-12-17 20:14:38 +02:00
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2011-12-08 03:05:23 +03:00
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flush_put_bits(&pb);
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2005-12-17 20:14:38 +02:00
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2012-02-11 22:39:12 +03:00
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pkt->size = put_bits_count(&pb) / 8;
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pkt->flags |= AV_PKT_FLAG_KEY;
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*got_packet = 1;
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return 0;
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2003-07-27 23:20:31 +03:00
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}
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2011-12-09 08:01:15 +03:00
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#define OFFSET(x) offsetof(CLJRContext, x)
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#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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2012-09-05 15:26:01 +03:00
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{ "dither_type", "Dither type", OFFSET(dither_type), AV_OPT_TYPE_INT, { .i64=1 }, 0, 2, VE},
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2011-12-09 08:01:15 +03:00
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{ NULL },
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};
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static const AVClass class = {
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.class_name = "cljr encoder",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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2011-01-25 23:40:11 +02:00
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AVCodec ff_cljr_encoder = {
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2011-07-17 13:54:31 +03:00
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.name = "cljr",
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.type = AVMEDIA_TYPE_VIDEO,
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2012-08-05 12:11:04 +03:00
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.id = AV_CODEC_ID_CLJR,
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2011-07-17 13:54:31 +03:00
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.priv_data_size = sizeof(CLJRContext),
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2012-11-21 23:34:46 +03:00
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.init = encode_init,
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2012-02-11 22:39:12 +03:00
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.encode2 = encode_frame,
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2012-10-06 13:10:34 +03:00
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.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P,
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AV_PIX_FMT_NONE },
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2011-12-08 03:05:23 +03:00
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.long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
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2011-12-09 08:01:15 +03:00
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.priv_class = &class,
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2003-07-27 23:20:31 +03:00
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};
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2008-09-03 15:33:21 +03:00
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#endif
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