1/*
2 * PAM image format
3 * Copyright (c) 2002, 2003 Fabrice Bellard
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 "avcodec.h"
23#include "bytestream.h"
24#include "pnm.h"
25
26
27static int pam_encode_frame(AVCodecContext *avctx, unsigned char *outbuf,
28                            int buf_size, void *data)
29{
30    PNMContext *s     = avctx->priv_data;
31    AVFrame *pict     = data;
32    AVFrame * const p = (AVFrame*)&s->picture;
33    int i, h, w, n, linesize, depth, maxval;
34    const char *tuple_type;
35    uint8_t *ptr;
36
37    if (buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200) {
38        av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
39        return -1;
40    }
41
42    *p           = *pict;
43    p->pict_type = FF_I_TYPE;
44    p->key_frame = 1;
45
46    s->bytestream_start =
47    s->bytestream       = outbuf;
48    s->bytestream_end   = outbuf+buf_size;
49
50    h = avctx->height;
51    w = avctx->width;
52    switch (avctx->pix_fmt) {
53    case PIX_FMT_MONOWHITE:
54        n          = (w + 7) >> 3;
55        depth      = 1;
56        maxval     = 1;
57        tuple_type = "BLACKANDWHITE";
58        break;
59    case PIX_FMT_GRAY8:
60        n          = w;
61        depth      = 1;
62        maxval     = 255;
63        tuple_type = "GRAYSCALE";
64        break;
65    case PIX_FMT_RGB24:
66        n          = w * 3;
67        depth      = 3;
68        maxval     = 255;
69        tuple_type = "RGB";
70        break;
71    case PIX_FMT_RGB32:
72        n          = w * 4;
73        depth      = 4;
74        maxval     = 255;
75        tuple_type = "RGB_ALPHA";
76        break;
77    default:
78        return -1;
79    }
80    snprintf(s->bytestream, s->bytestream_end - s->bytestream,
81             "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLETYPE %s\nENDHDR\n",
82             w, h, depth, maxval, tuple_type);
83    s->bytestream += strlen(s->bytestream);
84
85    ptr      = p->data[0];
86    linesize = p->linesize[0];
87
88    if (avctx->pix_fmt == PIX_FMT_RGB32) {
89        int j;
90        unsigned int v;
91
92        for (i = 0; i < h; i++) {
93            for (j = 0; j < w; j++) {
94                v = ((uint32_t *)ptr)[j];
95                bytestream_put_be24(&s->bytestream, v);
96                *s->bytestream++ = v >> 24;
97            }
98            ptr += linesize;
99        }
100    } else {
101        for (i = 0; i < h; i++) {
102            memcpy(s->bytestream, ptr, n);
103            s->bytestream += n;
104            ptr           += linesize;
105        }
106    }
107    return s->bytestream - s->bytestream_start;
108}
109
110
111AVCodec pam_encoder = {
112    "pam",
113    AVMEDIA_TYPE_VIDEO,
114    CODEC_ID_PAM,
115    sizeof(PNMContext),
116    ff_pnm_init,
117    pam_encode_frame,
118    .pix_fmts  = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, PIX_FMT_NONE},
119    .long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
120};
121