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/*
* Cirrus Logic AccuPak (CLJR) encoder
* Copyright (c) 2003 Alex Beregszaszi
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Cirrus Logic AccuPak encoder.
*/
#include "libavutil/common.h"
#include "avcodec.h"
#include "internal.h"
#include "put_bits.h"
static av_cold int encode_init(AVCodecContext *avctx)
{
avctx->coded_frame = av_frame_alloc();
if (!avctx->coded_frame)
return AVERROR(ENOMEM);
return 0;
}
static av_cold int encode_close(AVCodecContext *avctx)
{
av_frame_free(&avctx->coded_frame);
return 0;
}
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *p, int *got_packet)
{
PutBitContext pb;
int x, y, ret;
if ((ret = ff_alloc_packet(pkt, 32*avctx->height*avctx->width/4)) < 0) {
av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
return ret;
}
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
avctx->coded_frame->key_frame = 1;
init_put_bits(&pb, pkt->data, pkt->size);
for (y = 0; y < avctx->height; y++) {
uint8_t *luma = &p->data[0][y * p->linesize[0]];
uint8_t *cb = &p->data[1][y * p->linesize[1]];
uint8_t *cr = &p->data[2][y * p->linesize[2]];
for (x = 0; x < avctx->width; x += 4) {
put_bits(&pb, 5, luma[3] >> 3);
put_bits(&pb, 5, luma[2] >> 3);
put_bits(&pb, 5, luma[1] >> 3);
put_bits(&pb, 5, luma[0] >> 3);
luma += 4;
put_bits(&pb, 6, *(cb++) >> 2);
put_bits(&pb, 6, *(cr++) >> 2);
}
}
flush_put_bits(&pb);
pkt->size = put_bits_count(&pb) / 8;
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
AVCodec ff_cljr_encoder = {
.name = "cljr",
.long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_CLJR,
.init = encode_init,
.encode2 = encode_frame,
.close = encode_close,
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P,
AV_PIX_FMT_NONE },
};
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