2 * V.Flash PTX (.ptx) image decoder
3 * Copyright (c) 2007 Ivo van Poorten
5 * This file is part of FFmpeg.
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.
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.
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
24 typedef struct PTXContext {
28 static int ptx_init(AVCodecContext *avctx) {
29 PTXContext *s = avctx->priv_data;
31 avcodec_get_frame_defaults(&s->picture);
32 avctx->coded_frame= &s->picture;
37 static int ptx_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
38 const uint8_t *buf, int buf_size) {
39 PTXContext * const s = avctx->priv_data;
40 AVFrame *picture = data;
41 AVFrame * const p = &s->picture;
42 unsigned int offset, w, h, y, stride, bytes_per_pixel;
45 offset = AV_RL16(buf);
48 bytes_per_pixel = AV_RL16(buf+12) >> 3;
50 if (bytes_per_pixel != 2) {
51 av_log(avctx, AV_LOG_ERROR, "image format is not rgb15, please report on ffmpeg-users mailing list\n");
55 avctx->pix_fmt = PIX_FMT_RGB555;
58 av_log(avctx, AV_LOG_WARNING, "offset != 0x2c, untested due to lack of sample files\n");
63 avctx->release_buffer(avctx, p);
65 if (avcodec_check_dimensions(avctx, w, h))
67 if (w != avctx->width || h != avctx->height)
68 avcodec_set_dimensions(avctx, w, h);
69 if (avctx->get_buffer(avctx, p) < 0) {
70 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
74 p->pict_type = FF_I_TYPE;
77 stride = p->linesize[0];
80 #ifdef WORDS_BIGENDIAN
82 for (x=0; x<w*bytes_per_pixel; x+=bytes_per_pixel)
83 AV_WN16(ptr+x, AV_RL16(buf+x));
85 memcpy(ptr, buf, w*bytes_per_pixel);
88 buf += w*bytes_per_pixel;
91 *picture = s->picture;
92 *data_size = sizeof(AVPicture);
94 return offset + w*h*bytes_per_pixel;
97 static int ptx_end(AVCodecContext *avctx) {
98 PTXContext *s = avctx->priv_data;
100 if(s->picture.data[0])
101 avctx->release_buffer(avctx, &s->picture);
106 AVCodec ptx_decoder = {