mirror of https://github.com/FFmpeg/FFmpeg.git
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/*
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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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