Add ff_ prefix to data symbols of encoders, decoders, hwaccel, parsers, bsf.
[libav.git] / libavcodec / ptx.c
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/intreadwrite.h"
23 #include "libavcore/imgutils.h"
24 #include "avcodec.h"
25
26 typedef struct PTXContext {
27 AVFrame picture;
28 } PTXContext;
29
30 static av_cold int ptx_init(AVCodecContext *avctx) {
31 PTXContext *s = avctx->priv_data;
32
33 avcodec_get_frame_defaults(&s->picture);
34 avctx->coded_frame= &s->picture;
35
36 return 0;
37 }
38
39 static int ptx_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
40 AVPacket *avpkt) {
41 const uint8_t *buf = avpkt->data;
42 PTXContext * const s = avctx->priv_data;
43 AVFrame *picture = data;
44 AVFrame * const p = &s->picture;
45 unsigned int offset, w, h, y, stride, bytes_per_pixel;
46 uint8_t *ptr;
47
48 offset = AV_RL16(buf);
49 w = AV_RL16(buf+8);
50 h = AV_RL16(buf+10);
51 bytes_per_pixel = AV_RL16(buf+12) >> 3;
52
53 if (bytes_per_pixel != 2) {
54 av_log(avctx, AV_LOG_ERROR, "image format is not rgb15, please report on ffmpeg-users mailing list\n");
55 return -1;
56 }
57
58 avctx->pix_fmt = PIX_FMT_RGB555;
59
60 if (offset != 0x2c)
61 av_log(avctx, AV_LOG_WARNING, "offset != 0x2c, untested due to lack of sample files\n");
62
63 buf += offset;
64
65 if (p->data[0])
66 avctx->release_buffer(avctx, p);
67
68 if (av_image_check_size(w, h, 0, avctx))
69 return -1;
70 if (w != avctx->width || h != avctx->height)
71 avcodec_set_dimensions(avctx, w, h);
72 if (avctx->get_buffer(avctx, p) < 0) {
73 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
74 return -1;
75 }
76
77 p->pict_type = FF_I_TYPE;
78
79 ptr = p->data[0];
80 stride = p->linesize[0];
81
82 for (y=0; y<h; y++) {
83 #if HAVE_BIGENDIAN
84 unsigned int x;
85 for (x=0; x<w*bytes_per_pixel; x+=bytes_per_pixel)
86 AV_WN16(ptr+x, AV_RL16(buf+x));
87 #else
88 memcpy(ptr, buf, w*bytes_per_pixel);
89 #endif
90 ptr += stride;
91 buf += w*bytes_per_pixel;
92 }
93
94 *picture = s->picture;
95 *data_size = sizeof(AVPicture);
96
97 return offset + w*h*bytes_per_pixel;
98 }
99
100 static av_cold int ptx_end(AVCodecContext *avctx) {
101 PTXContext *s = avctx->priv_data;
102
103 if(s->picture.data[0])
104 avctx->release_buffer(avctx, &s->picture);
105
106 return 0;
107 }
108
109 AVCodec ff_ptx_decoder = {
110 "ptx",
111 AVMEDIA_TYPE_VIDEO,
112 CODEC_ID_PTX,
113 sizeof(PTXContext),
114 ptx_init,
115 NULL,
116 ptx_end,
117 ptx_decode_frame,
118 CODEC_CAP_DR1,
119 NULL,
120 .long_name = NULL_IF_CONFIG_SMALL("V.Flash PTX image"),
121 };