| /* |
| * XBM image format |
| * |
| * Copyright (c) 2012 Paul B Mahol |
| * |
| * 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 |
| */ |
| |
| #include "libavutil/reverse.h" |
| #include "avcodec.h" |
| #include "codec_internal.h" |
| #include "encode.h" |
| #include "mathops.h" |
| |
| #define ANSI_MIN_READLINE 509 |
| |
| static int xbm_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
| const AVFrame *p, int *got_packet) |
| { |
| int i, j, l, commas, ret, size, linesize, lineout, rowsout; |
| const uint8_t *ptr; |
| uint8_t *buf; |
| |
| linesize = lineout = (avctx->width + 7) / 8; |
| commas = avctx->height * linesize; |
| |
| /* ANSI worst case minimum readline is 509 chars. */ |
| rowsout = avctx->height; |
| if (lineout > (ANSI_MIN_READLINE / 6)) { |
| lineout = ANSI_MIN_READLINE / 6; |
| rowsout = (commas + lineout - 1) / lineout; |
| } |
| |
| size = rowsout * (lineout * 6 + 1) + 106; |
| if ((ret = ff_alloc_packet(avctx, pkt, size)) < 0) |
| 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, 39, "static unsigned char image_bits[] = {\n"); |
| for (i = 0, l = lineout; i < avctx->height; i++) { |
| for (j = 0; j < linesize; j++) { |
| buf += snprintf(buf, 6, " 0x%02X", ff_reverse[*ptr++]); |
| if (--commas <= 0) { |
| buf += snprintf(buf, 2, "\n"); |
| break; |
| } |
| buf += snprintf(buf, 2, ","); |
| if (--l <= 0) { |
| buf += snprintf(buf, 2, "\n"); |
| l = lineout; |
| } |
| } |
| ptr += p->linesize[0] - linesize; |
| } |
| buf += snprintf(buf, 5, " };\n"); |
| |
| pkt->size = buf - pkt->data; |
| *got_packet = 1; |
| return 0; |
| } |
| |
| const FFCodec ff_xbm_encoder = { |
| .p.name = "xbm", |
| CODEC_LONG_NAME("XBM (X BitMap) image"), |
| .p.type = AVMEDIA_TYPE_VIDEO, |
| .p.id = AV_CODEC_ID_XBM, |
| .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE, |
| FF_CODEC_ENCODE_CB(xbm_encode_frame), |
| .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_MONOWHITE, |
| AV_PIX_FMT_NONE }, |
| }; |