repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * V.Flash PTX (.ptx) image decoder | |
| 3 | * Copyright (c) 2007 Ivo van Poorten | |
| 4 | * | |
| 5 | * This file is part of FFmpeg. | |
| 6 | * | |
| 7 | * FFmpeg is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU Lesser General Public | |
| 9 | * License as published by the Free Software Foundation; either | |
| 10 | * version 2.1 of the License, or (at your option) any later version. | |
| 11 | * | |
| 12 | * FFmpeg is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * Lesser General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU Lesser General Public | |
| 18 | * License along with FFmpeg; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 20 | */ | |
| 21 | ||
| 22 | #include "libavutil/common.h" | |
| 23 | #include "libavutil/intreadwrite.h" | |
| 24 | #include "libavutil/imgutils.h" | |
| 25 | #include "avcodec.h" | |
| 26 | #include "internal.h" | |
| 27 | ||
| 28 | static int ptx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, | |
| 29 | AVPacket *avpkt) { | |
| 30 | const uint8_t *buf = avpkt->data; | |
| 31 | const uint8_t *buf_end = avpkt->data + avpkt->size; | |
| 32 | AVFrame * const p = data; | |
| 33 | unsigned int offset, w, h, y, stride, bytes_per_pixel; | |
| 34 | int ret; | |
| 35 | uint8_t *ptr; | |
| 36 | ||
| 37 | if (buf_end - buf < 14) | |
| 38 | return AVERROR_INVALIDDATA; | |
| 39 | offset = AV_RL16(buf); | |
| 40 | w = AV_RL16(buf+8); | |
| 41 | h = AV_RL16(buf+10); | |
| 42 | bytes_per_pixel = AV_RL16(buf+12) >> 3; | |
| 43 | ||
| 44 | if (bytes_per_pixel != 2) { | |
| 45 | avpriv_request_sample(avctx, "Image format not RGB15"); | |
| 46 | return AVERROR_PATCHWELCOME; | |
| 47 | } | |
| 48 | ||
| 49 | avctx->pix_fmt = AV_PIX_FMT_BGR555LE; | |
| 50 | ||
| 51 | if (buf_end - buf < offset) | |
| 52 | return AVERROR_INVALIDDATA; | |
| 53 | if (offset != 0x2c) | |
| 54 | avpriv_request_sample(avctx, "offset != 0x2c"); | |
| 55 | ||
| 56 | buf += offset; | |
| 57 | ||
| 58 | if ((ret = ff_set_dimensions(avctx, w, h)) < 0) | |
| 59 | return ret; | |
| 60 | ||
| 61 | if ((ret = ff_get_buffer(avctx, p, 0)) < 0) | |
| 62 | return ret; | |
| 63 | ||
| 64 | p->pict_type = AV_PICTURE_TYPE_I; | |
| 65 | ||
| 66 | ptr = p->data[0]; | |
| 67 | stride = p->linesize[0]; | |
| 68 | ||
| 69 | for (y = 0; y < h && buf_end - buf >= w * bytes_per_pixel; y++) { | |
| 70 | memcpy(ptr, buf, w*bytes_per_pixel); | |
| 71 | ptr += stride; | |
| 72 | buf += w*bytes_per_pixel; | |
| 73 | } | |
| 74 | ||
| 75 | *got_frame = 1; | |
| 76 | ||
| 77 | if (y < h) { | |
| 78 | av_log(avctx, AV_LOG_WARNING, "incomplete packet\n"); | |
| 79 | return avpkt->size; | |
| 80 | } | |
| 81 | ||
| 82 | return offset + w*h*bytes_per_pixel; | |
| 83 | } | |
| 84 | ||
| 85 | AVCodec ff_ptx_decoder = { | |
| 86 | .name = "ptx", | |
| 87 | .long_name = NULL_IF_CONFIG_SMALL("V.Flash PTX image"), | |
| 88 | .type = AVMEDIA_TYPE_VIDEO, | |
| 89 | .id = AV_CODEC_ID_PTX, | |
| 90 | .decode = ptx_decode_frame, | |
| 91 | .capabilities = CODEC_CAP_DR1, | |
| 92 | }; |