1/* 2 * XBM image format 3 * 4 * Copyright (c) 2012 Paul B Mahol 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23#include "libavutil/reverse.h" 24#include "avcodec.h" 25#include "codec_internal.h" 26#include "encode.h" 27#include "mathops.h" 28 29#define ANSI_MIN_READLINE 509 30 31static int xbm_encode_frame(AVCodecContext *avctx, AVPacket *pkt, 32 const AVFrame *p, int *got_packet) 33{ 34 int i, j, l, commas, ret, size, linesize, lineout, rowsout; 35 uint8_t *ptr, *buf; 36 37 linesize = lineout = (avctx->width + 7) / 8; 38 commas = avctx->height * linesize; 39 40 /* ANSI worst case minimum readline is 509 chars. */ 41 rowsout = avctx->height; 42 if (lineout > (ANSI_MIN_READLINE / 6)) { 43 lineout = ANSI_MIN_READLINE / 6; 44 rowsout = (commas + lineout - 1) / lineout; 45 } 46 47 size = rowsout * (lineout * 6 + 1) + 106; 48 if ((ret = ff_alloc_packet(avctx, pkt, size)) < 0) 49 return ret; 50 51 buf = pkt->data; 52 ptr = p->data[0]; 53 54 buf += snprintf(buf, 32, "#define image_width %u\n", avctx->width); 55 buf += snprintf(buf, 33, "#define image_height %u\n", avctx->height); 56 buf += snprintf(buf, 39, "static unsigned char image_bits[] = {\n"); 57 for (i = 0, l = lineout; i < avctx->height; i++) { 58 for (j = 0; j < linesize; j++) { 59 buf += snprintf(buf, 6, " 0x%02X", ff_reverse[*ptr++]); 60 if (--commas <= 0) { 61 buf += snprintf(buf, 2, "\n"); 62 break; 63 } 64 buf += snprintf(buf, 2, ","); 65 if (--l <= 0) { 66 buf += snprintf(buf, 2, "\n"); 67 l = lineout; 68 } 69 } 70 ptr += p->linesize[0] - linesize; 71 } 72 buf += snprintf(buf, 5, " };\n"); 73 74 pkt->size = buf - pkt->data; 75 *got_packet = 1; 76 return 0; 77} 78 79const FFCodec ff_xbm_encoder = { 80 .p.name = "xbm", 81 .p.long_name = NULL_IF_CONFIG_SMALL("XBM (X BitMap) image"), 82 .p.type = AVMEDIA_TYPE_VIDEO, 83 .p.id = AV_CODEC_ID_XBM, 84 FF_CODEC_ENCODE_CB(xbm_encode_frame), 85 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_MONOWHITE, 86 AV_PIX_FMT_NONE }, 87}; 88