/* * Cirrus Logic AccuPak (CLJR) codec * Copyright (c) 2003 Alex Beregszaszi * * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file libavcodec/cljr.c * Cirrus Logic AccuPak codec. */ #include "avcodec.h" #include "dsputil.h" #include "get_bits.h" /* Disable the encoder. */ #undef CONFIG_CLJR_ENCODER #define CONFIG_CLJR_ENCODER 0 typedef struct CLJRContext{ AVCodecContext *avctx; AVFrame picture; int delta[16]; int offset[4]; GetBitContext gb; } CLJRContext; static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt) { const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; CLJRContext * const a = avctx->priv_data; AVFrame *picture = data; AVFrame * const p= (AVFrame*)&a->picture; int x, y; if(p->data[0]) avctx->release_buffer(avctx, p); p->reference= 0; if(avctx->get_buffer(avctx, p) < 0){ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); return -1; } p->pict_type= FF_I_TYPE; p->key_frame= 1; init_get_bits(&a->gb, buf, buf_size); for(y=0; y<avctx->height; y++){ uint8_t *luma= &a->picture.data[0][ y*a->picture.linesize[0] ]; uint8_t *cb= &a->picture.data[1][ y*a->picture.linesize[1] ]; uint8_t *cr= &a->picture.data[2][ y*a->picture.linesize[2] ]; for(x=0; x<avctx->width; x+=4){ luma[3] = get_bits(&a->gb, 5) << 3; luma[2] = get_bits(&a->gb, 5) << 3; luma[1] = get_bits(&a->gb, 5) << 3; luma[0] = get_bits(&a->gb, 5) << 3; luma+= 4; *(cb++) = get_bits(&a->gb, 6) << 2; *(cr++) = get_bits(&a->gb, 6) << 2; } } *picture= *(AVFrame*)&a->picture; *data_size = sizeof(AVPicture); emms_c(); return buf_size; } #if CONFIG_CLJR_ENCODER static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){ CLJRContext * const a = avctx->priv_data; AVFrame *pict = data; AVFrame * const p= (AVFrame*)&a->picture; int size; *p = *pict; p->pict_type= FF_I_TYPE; p->key_frame= 1; emms_c(); align_put_bits(&a->pb); while(get_bit_count(&a->pb)&31) put_bits(&a->pb, 8, 0); size= get_bit_count(&a->pb)/32; return size*4; } #endif static av_cold void common_init(AVCodecContext *avctx){ CLJRContext * const a = avctx->priv_data; avctx->coded_frame= (AVFrame*)&a->picture; a->avctx= avctx; } static av_cold int decode_init(AVCodecContext *avctx){ common_init(avctx); avctx->pix_fmt= PIX_FMT_YUV411P; return 0; } #if CONFIG_CLJR_ENCODER static av_cold int encode_init(AVCodecContext *avctx){ common_init(avctx); return 0; } #endif AVCodec cljr_decoder = { "cljr", CODEC_TYPE_VIDEO, CODEC_ID_CLJR, sizeof(CLJRContext), decode_init, NULL, NULL, decode_frame, CODEC_CAP_DR1, .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"), }; #if CONFIG_CLJR_ENCODER AVCodec cljr_encoder = { "cljr", CODEC_TYPE_VIDEO, CODEC_ID_CLJR, sizeof(CLJRContext), encode_init, encode_frame, //encode_end, .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"), }; #endif