| /* |
| * WBMP (Wireless Application Protocol Bitmap) image |
| * |
| * 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 "avcodec.h" |
| #include "bytestream.h" |
| #include "codec_internal.h" |
| #include "encode.h" |
| |
| static void putv(uint8_t ** bufp, unsigned int v) |
| { |
| unsigned int vv = 0; |
| int n = 0; |
| |
| while (vv != v) |
| vv += v & (0x7F << 7 * n++); |
| |
| while (--n > 0) |
| bytestream_put_byte(bufp, 0x80 | (v & (0x7F << 7 * n)) >> 7 * n); |
| |
| bytestream_put_byte(bufp, v & 0x7F); |
| } |
| |
| static void writebits(uint8_t ** bufp, const uint8_t * src, int width, int height, int linesize) |
| { |
| int wpad = (width + 7) / 8; |
| for (int j = 0; j < height; j++) { |
| memcpy(*bufp, src, wpad); |
| *bufp += wpad; |
| src += linesize; |
| } |
| } |
| |
| static int wbmp_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
| const AVFrame *frame, int *got_packet) |
| { |
| int64_t size = avctx->height * ((avctx->width + 7) / 8) + 32; |
| uint8_t *buf; |
| int ret; |
| |
| if ((ret = ff_get_encode_buffer(avctx, pkt, size, 0)) < 0) |
| return ret; |
| |
| buf = pkt->data; |
| |
| putv(&buf, 0); |
| bytestream_put_byte(&buf, 0); |
| putv(&buf, avctx->width); |
| putv(&buf, avctx->height); |
| |
| if (frame->linesize[0] == (avctx->width + 7) / 8) |
| bytestream_put_buffer(&buf, frame->data[0], avctx->height * ((avctx->width + 7) / 8)); |
| else |
| writebits(&buf, frame->data[0], avctx->width, avctx->height, frame->linesize[0]); |
| |
| av_shrink_packet(pkt, buf - pkt->data); |
| |
| *got_packet = 1; |
| return 0; |
| } |
| |
| const FFCodec ff_wbmp_encoder = { |
| .p.name = "wbmp", |
| CODEC_LONG_NAME("WBMP (Wireless Application Protocol Bitmap) image"), |
| .p.type = AVMEDIA_TYPE_VIDEO, |
| .p.id = AV_CODEC_ID_WBMP, |
| .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS | |
| AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE, |
| FF_CODEC_ENCODE_CB(wbmp_encode_frame), |
| .p.pix_fmts = (const enum AVPixelFormat[]){ |
| AV_PIX_FMT_MONOBLACK, |
| AV_PIX_FMT_NONE |
| }, |
| }; |