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https://github.com/FFmpeg/FFmpeg.git
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88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
/*
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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 Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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static av_cold int xbm_encode_init(AVCodecContext *avctx)
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{
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avctx->coded_frame = av_frame_alloc();
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if (!avctx->coded_frame)
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return AVERROR(ENOMEM);
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avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
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return 0;
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}
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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, ret, size, linesize;
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uint8_t *ptr, *buf;
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linesize = (avctx->width + 7) / 8;
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size = avctx->height * (linesize * 7 + 2) + 110;
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if ((ret = ff_alloc_packet(pkt, size)) < 0) {
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av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
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return ret;
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}
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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, 40, "static unsigned char image_bits[] = {\n");
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for (i = 0; i < avctx->height; i++) {
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for (j = 0; j < linesize; j++)
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buf += snprintf(buf, 7, " 0x%02X,", ff_reverse[*ptr++]);
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ptr += p->linesize[0] - linesize;
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buf += snprintf(buf, 2, "\n");
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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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static av_cold int xbm_encode_close(AVCodecContext *avctx)
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{
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av_freep(&avctx->coded_frame);
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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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.init = xbm_encode_init,
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.encode2 = xbm_encode_frame,
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.close = xbm_encode_close,
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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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};
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