From 373a6dda5422186bc057297342a9e559a564595e Mon Sep 17 00:00:00 2001 From: Nidhi Makhijani Date: Sat, 5 Jul 2014 21:04:05 +0530 Subject: cljr: split decoder and encoder Signed-off-by: Diego Biurrun --- libavcodec/cljrenc.c | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 libavcodec/cljrenc.c (limited to 'libavcodec/cljrenc.c') diff --git a/libavcodec/cljrenc.c b/libavcodec/cljrenc.c new file mode 100644 index 0000000000..2c315555e6 --- /dev/null +++ b/libavcodec/cljrenc.c @@ -0,0 +1,97 @@ +/* + * 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 }, +}; -- cgit v1.2.3