| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * WBMP (Wireless Application Protocol Bitmap) image | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #include "avcodec.h" | ||
| 22 | #include "bytestream.h" | ||
| 23 | #include "codec_internal.h" | ||
| 24 | #include "decode.h" | ||
| 25 | #include "thread.h" | ||
| 26 | |||
| 27 | 42 | static unsigned int getv(GetByteContext * gb) | |
| 28 | { | ||
| 29 | int i; | ||
| 30 | 42 | unsigned int v = 0; | |
| 31 | |||
| 32 | do { | ||
| 33 | 70 | i = bytestream2_get_byte(gb); | |
| 34 | 70 | v = (v << 7) | (i & 0x7F); | |
| 35 |
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70 | } while (i & 0x80); |
| 36 | 42 | return v; | |
| 37 | } | ||
| 38 | |||
| 39 | 14 | static void readbits(uint8_t * dst, int width, int height, int linesize, const uint8_t * src, int size) | |
| 40 | { | ||
| 41 | 14 | int wpad = (width + 7) / 8; | |
| 42 |
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4046 | for (int j = 0; j < height && size > 0; j++) { |
| 43 | 4032 | memcpy(dst, src, FFMIN(wpad, size)); | |
| 44 | 4032 | src += wpad; | |
| 45 | 4032 | size -= wpad; | |
| 46 | 4032 | dst += linesize; | |
| 47 | } | ||
| 48 | 14 | } | |
| 49 | |||
| 50 | 14 | static int wbmp_decode_frame(AVCodecContext *avctx, AVFrame *p, | |
| 51 | int *got_frame, AVPacket *avpkt) | ||
| 52 | { | ||
| 53 | 14 | const uint8_t *buf = avpkt->data; | |
| 54 | 14 | int buf_size = avpkt->size, width, height, ret; | |
| 55 | GetByteContext gb; | ||
| 56 | |||
| 57 | 14 | bytestream2_init(&gb, buf, buf_size); | |
| 58 | |||
| 59 |
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14 | if (getv(&gb)) |
| 60 | ✗ | return AVERROR_INVALIDDATA; | |
| 61 | 14 | bytestream2_skip(&gb, 1); | |
| 62 | 14 | width = getv(&gb); | |
| 63 | 14 | height = getv(&gb); | |
| 64 | |||
| 65 |
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14 | if ((ret = ff_set_dimensions(avctx, width, height)) < 0) |
| 66 | ✗ | return ret; | |
| 67 | |||
| 68 | 14 | avctx->pix_fmt = AV_PIX_FMT_MONOBLACK; | |
| 69 |
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14 | if ((ret = ff_thread_get_buffer(avctx, p, 0)) < 0) |
| 70 | ✗ | return ret; | |
| 71 | |||
| 72 |
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14 | if (p->linesize[0] == (width + 7) / 8) |
| 73 | ✗ | bytestream2_get_buffer(&gb, p->data[0], height * ((width + 7) / 8)); | |
| 74 | else | ||
| 75 | 14 | readbits(p->data[0], width, height, p->linesize[0], gb.buffer, gb.buffer_end - gb.buffer); | |
| 76 | |||
| 77 | 14 | *got_frame = 1; | |
| 78 | |||
| 79 | 14 | return buf_size; | |
| 80 | } | ||
| 81 | |||
| 82 | const FFCodec ff_wbmp_decoder = { | ||
| 83 | .p.name = "wbmp", | ||
| 84 | CODEC_LONG_NAME("WBMP (Wireless Application Protocol Bitmap) image"), | ||
| 85 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 86 | .p.id = AV_CODEC_ID_WBMP, | ||
| 87 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, | ||
| 88 | FF_CODEC_DECODE_CB(wbmp_decode_frame), | ||
| 89 | }; | ||
| 90 |