diff options
Diffstat (limited to 'ffmpeg/libavcodec/lclenc.c')
| -rw-r--r-- | ffmpeg/libavcodec/lclenc.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/ffmpeg/libavcodec/lclenc.c b/ffmpeg/libavcodec/lclenc.c deleted file mode 100644 index 0afe553..0000000 --- a/ffmpeg/libavcodec/lclenc.c +++ /dev/null @@ -1,201 +0,0 @@ -/* - * LCL (LossLess Codec Library) Codec - * Copyright (c) 2002-2004 Roberto Togni - * - * 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 - * LCL (LossLess Codec Library) Video Codec - * Decoder for MSZH and ZLIB codecs - * Experimental encoder for ZLIB RGB24 - * - * Fourcc: MSZH, ZLIB - * - * Original Win32 dll: - * Ver2.23 By Kenji Oshima 2000.09.20 - * avimszh.dll, avizlib.dll - * - * A description of the decoding algorithm can be found here: - * http://www.pcisys.net/~melanson/codecs - * - * Supports: BGR24 (RGB 24bpp) - * - */ - -#include <stdio.h> -#include <stdlib.h> - -#include "libavutil/avassert.h" -#include "avcodec.h" -#include "internal.h" -#include "lcl.h" -#include "libavutil/internal.h" -#include "libavutil/mem.h" - -#include <zlib.h> - -/* - * Decoder context - */ -typedef struct LclEncContext { - - AVCodecContext *avctx; - - // Image type - int imgtype; - // Compression type - int compression; - // Flags - int flags; - z_stream zstream; -} LclEncContext; - -/* - * - * Encode a frame - * - */ -static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, - const AVFrame *p, int *got_packet) -{ - LclEncContext *c = avctx->priv_data; - int i, ret; - int zret; // Zlib return code - int max_size = deflateBound(&c->zstream, avctx->width * avctx->height * 3); - - if ((ret = ff_alloc_packet2(avctx, pkt, max_size)) < 0) - return ret; - - if(avctx->pix_fmt != AV_PIX_FMT_BGR24){ - av_log(avctx, AV_LOG_ERROR, "Format not supported!\n"); - return -1; - } - - zret = deflateReset(&c->zstream); - if (zret != Z_OK) { - av_log(avctx, AV_LOG_ERROR, "Deflate reset error: %d\n", zret); - return -1; - } - c->zstream.next_out = pkt->data; - c->zstream.avail_out = pkt->size; - - for(i = avctx->height - 1; i >= 0; i--) { - c->zstream.next_in = p->data[0]+p->linesize[0]*i; - c->zstream.avail_in = avctx->width*3; - zret = deflate(&c->zstream, Z_NO_FLUSH); - if (zret != Z_OK) { - av_log(avctx, AV_LOG_ERROR, "Deflate error: %d\n", zret); - return -1; - } - } - zret = deflate(&c->zstream, Z_FINISH); - if (zret != Z_STREAM_END) { - av_log(avctx, AV_LOG_ERROR, "Deflate error: %d\n", zret); - return -1; - } - - pkt->size = c->zstream.total_out; - pkt->flags |= AV_PKT_FLAG_KEY; - *got_packet = 1; - - return 0; -} - -/* - * - * Init lcl encoder - * - */ -static av_cold int encode_init(AVCodecContext *avctx) -{ - LclEncContext *c = avctx->priv_data; - int zret; // Zlib return code - - c->avctx= avctx; - - av_assert0(avctx->width && avctx->height); - - avctx->extradata = av_mallocz(8 + FF_INPUT_BUFFER_PADDING_SIZE); - if (!avctx->extradata) - return AVERROR(ENOMEM); - - avctx->coded_frame = av_frame_alloc(); - if (!avctx->coded_frame) - return AVERROR(ENOMEM); - - avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; - avctx->coded_frame->key_frame = 1; - - c->compression = avctx->compression_level == FF_COMPRESSION_DEFAULT ? - COMP_ZLIB_NORMAL : - av_clip(avctx->compression_level, 0, 9); - c->flags = 0; - c->imgtype = IMGTYPE_RGB24; - avctx->bits_per_coded_sample= 24; - - avctx->extradata[0]= 4; - avctx->extradata[1]= 0; - avctx->extradata[2]= 0; - avctx->extradata[3]= 0; - avctx->extradata[4]= c->imgtype; - avctx->extradata[5]= c->compression; - avctx->extradata[6]= c->flags; - avctx->extradata[7]= CODEC_ZLIB; - c->avctx->extradata_size= 8; - - c->zstream.zalloc = Z_NULL; - c->zstream.zfree = Z_NULL; - c->zstream.opaque = Z_NULL; - zret = deflateInit(&c->zstream, c->compression); - if (zret != Z_OK) { - av_log(avctx, AV_LOG_ERROR, "Deflate init error: %d\n", zret); - return 1; - } - - return 0; -} - -/* - * - * Uninit lcl encoder - * - */ -static av_cold int encode_end(AVCodecContext *avctx) -{ - LclEncContext *c = avctx->priv_data; - - av_freep(&avctx->extradata); - deflateEnd(&c->zstream); - - av_frame_free(&avctx->coded_frame); - - return 0; -} - -AVCodec ff_zlib_encoder = { - .name = "zlib", - .long_name = NULL_IF_CONFIG_SMALL("LCL (LossLess Codec Library) ZLIB"), - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_ZLIB, - .priv_data_size = sizeof(LclEncContext), - .init = encode_init, - .encode2 = encode_frame, - .close = encode_end, - .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_BGR24, AV_PIX_FMT_NONE }, -}; |