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98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
/*
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* Cirrus Logic AccuPak (CLJR) encoder
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* Copyright (c) 2003 Alex Beregszaszi
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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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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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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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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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Cirrus Logic AccuPak encoder.
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*/
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#include "libavutil/common.h"
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#include "avcodec.h"
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#include "internal.h"
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#include "put_bits.h"
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static av_cold int encode_init(AVCodecContext *avctx)
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{
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avctx->coded_frame = av_frame_alloc();
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if (!avctx->coded_frame)
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return AVERROR(ENOMEM);
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return 0;
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}
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static av_cold int encode_close(AVCodecContext *avctx)
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{
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av_frame_free(&avctx->coded_frame);
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return 0;
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}
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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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{
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PutBitContext pb;
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int x, y, ret;
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if ((ret = ff_alloc_packet(pkt, 32*avctx->height*avctx->width/4)) < 0) {
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av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
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return ret;
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}
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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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init_put_bits(&pb, pkt->data, pkt->size);
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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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put_bits(&pb, 5, luma[3] >> 3);
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put_bits(&pb, 5, luma[2] >> 3);
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put_bits(&pb, 5, luma[1] >> 3);
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put_bits(&pb, 5, luma[0] >> 3);
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luma += 4;
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put_bits(&pb, 6, *(cb++) >> 2);
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put_bits(&pb, 6, *(cr++) >> 2);
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}
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}
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flush_put_bits(&pb);
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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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}
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AVCodec ff_cljr_encoder = {
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.name = "cljr",
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.long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_CLJR,
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.init = encode_init,
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.encode2 = encode_frame,
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.close = encode_close,
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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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};
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