Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 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 = av_image_check_size(w, h, 0, avctx)) < 0) |
||
| 59 | return ret; |
||
| 60 | if (w != avctx->width || h != avctx->height) |
||
| 61 | avcodec_set_dimensions(avctx, w, h); |
||
| 62 | if ((ret = ff_get_buffer(avctx, p, 0)) < 0) |
||
| 63 | return ret; |
||
| 64 | |||
| 65 | p->pict_type = AV_PICTURE_TYPE_I; |
||
| 66 | |||
| 67 | ptr = p->data[0]; |
||
| 68 | stride = p->linesize[0]; |
||
| 69 | |||
| 70 | for (y = 0; y < h && buf_end - buf >= w * bytes_per_pixel; y++) { |
||
| 71 | memcpy(ptr, buf, w*bytes_per_pixel); |
||
| 72 | ptr += stride; |
||
| 73 | buf += w*bytes_per_pixel; |
||
| 74 | } |
||
| 75 | |||
| 76 | *got_frame = 1; |
||
| 77 | |||
| 78 | if (y < h) { |
||
| 79 | av_log(avctx, AV_LOG_WARNING, "incomplete packet\n"); |
||
| 80 | return avpkt->size; |
||
| 81 | } |
||
| 82 | |||
| 83 | return offset + w*h*bytes_per_pixel; |
||
| 84 | } |
||
| 85 | |||
| 86 | AVCodec ff_ptx_decoder = { |
||
| 87 | .name = "ptx", |
||
| 88 | .long_name = NULL_IF_CONFIG_SMALL("V.Flash PTX image"), |
||
| 89 | .type = AVMEDIA_TYPE_VIDEO, |
||
| 90 | .id = AV_CODEC_ID_PTX, |
||
| 91 | .decode = ptx_decode_frame, |
||
| 92 | .capabilities = CODEC_CAP_DR1, |
||
| 93 | }; |