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/* |
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* XBM image format |
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* |
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* Copyright (c) 2012 Paul B Mahol |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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#include "avcodec.h" |
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#include "internal.h" |
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#include "mathops.h" |
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#define ANSI_MIN_READLINE 509 |
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static int xbm_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
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const AVFrame *p, int *got_packet) |
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{ |
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int i, j, l, commas, ret, size, linesize, lineout, rowsout; |
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uint8_t *ptr, *buf; |
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linesize = lineout = (avctx->width + 7) / 8; |
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commas = avctx->height * linesize; |
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/* ANSI worst case minimum readline is 509 chars. */ |
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rowsout = avctx->height; |
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✗✓ |
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if (lineout > (ANSI_MIN_READLINE / 6)) { |
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lineout = ANSI_MIN_READLINE / 6; |
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rowsout = (commas + lineout - 1) / lineout; |
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} |
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size = rowsout * (lineout * 6 + 1) + 106; |
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✗✓ |
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if ((ret = ff_alloc_packet2(avctx, pkt, size, 0)) < 0) |
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return ret; |
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buf = pkt->data; |
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ptr = p->data[0]; |
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buf += snprintf(buf, 32, "#define image_width %u\n", avctx->width); |
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buf += snprintf(buf, 33, "#define image_height %u\n", avctx->height); |
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buf += snprintf(buf, 39, "static unsigned char image_bits[] = {\n"); |
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✓✓ |
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for (i = 0, l = lineout; i < avctx->height; i++) { |
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✓✓ |
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for (j = 0; j < linesize; j++) { |
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buf += snprintf(buf, 6, " 0x%02X", ff_reverse[*ptr++]); |
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✓✓ |
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if (--commas <= 0) { |
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buf += snprintf(buf, 2, "\n"); |
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break; |
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} |
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buf += snprintf(buf, 2, ","); |
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✓✓ |
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if (--l <= 0) { |
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buf += snprintf(buf, 2, "\n"); |
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l = lineout; |
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} |
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} |
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ptr += p->linesize[0] - linesize; |
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} |
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buf += snprintf(buf, 5, " };\n"); |
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pkt->size = buf - pkt->data; |
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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_xbm_encoder = { |
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.name = "xbm", |
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.long_name = NULL_IF_CONFIG_SMALL("XBM (X BitMap) image"), |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_XBM, |
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.encode2 = xbm_encode_frame, |
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.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_MONOWHITE, |
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AV_PIX_FMT_NONE }, |
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}; |