From 0afd8f12e974c14112c6c3d8ae363c074b963711 Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Sat, 17 Mar 2012 17:43:58 +0000 Subject: avcodec: add XBM encoder Signed-off-by: Paul B Mahol Signed-off-by: Justin Ruggles --- libavcodec/xbmenc.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100644 libavcodec/xbmenc.c (limited to 'libavcodec/xbmenc.c') diff --git a/libavcodec/xbmenc.c b/libavcodec/xbmenc.c new file mode 100644 index 0000000000..2df6ae0d77 --- /dev/null +++ b/libavcodec/xbmenc.c @@ -0,0 +1,86 @@ +/* + * XBM image format + * + * Copyright (c) 2012 Paul B Mahol + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "avcodec.h" +#include "internal.h" + +static av_cold int xbm_encode_init(AVCodecContext *avctx) +{ + avctx->coded_frame = avcodec_alloc_frame(); + if (!avctx->coded_frame) + return AVERROR(ENOMEM); + avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; + + return 0; +} + +static int xbm_encode_frame(AVCodecContext *avctx, AVPacket *pkt, + const AVFrame *p, int *got_packet) +{ + int i, j, ret, size, linesize; + uint8_t *ptr, *buf; + + linesize = (avctx->width + 7) / 8; + size = avctx->height * (linesize * 7 + 2) + 110; + if ((ret = ff_alloc_packet(pkt, size)) < 0) { + av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n"); + return ret; + } + + buf = pkt->data; + ptr = p->data[0]; + + buf += snprintf(buf, 32, "#define image_width %u\n", avctx->width); + buf += snprintf(buf, 33, "#define image_height %u\n", avctx->height); + buf += snprintf(buf, 40, "static unsigned char image_bits[] = {\n"); + for (i = 0; i < avctx->height; i++) { + for (j = 0; j < linesize; j++) + buf += snprintf(buf, 7, " 0x%02X,", av_reverse[*ptr++]); + ptr += p->linesize[0] - linesize; + buf += snprintf(buf, 2, "\n"); + } + buf += snprintf(buf, 5, " };\n"); + + pkt->size = buf - pkt->data; + pkt->flags |= AV_PKT_FLAG_KEY; + *got_packet = 1; + return 0; +} + +static av_cold int xbm_encode_close(AVCodecContext *avctx) +{ + av_freep(&avctx->coded_frame); + + return 0; +} + +AVCodec ff_xbm_encoder = { + .name = "xbm", + .type = AVMEDIA_TYPE_VIDEO, + .id = CODEC_ID_XBM, + .init = xbm_encode_init, + .encode2 = xbm_encode_frame, + .close = xbm_encode_close, + .pix_fmts = (const enum PixelFormat[]) { PIX_FMT_MONOWHITE, + PIX_FMT_NONE }, + .long_name = NULL_IF_CONFIG_SMALL("XBM (X BitMap) image"), +}; -- cgit v1.2.3