/*
  * PAM image format
  * Copyright (c) 2002, 2003 Fabrice Bellard
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include "avcodec.h"
 #include "bytestream.h"
 #include "pnm.h"
 
 
 static int pam_encode_frame(AVCodecContext *avctx, unsigned char *outbuf,
                             int buf_size, void *data)
 {
     PNMContext *s     = avctx->priv_data;
     AVFrame *pict     = data;
     AVFrame * const p = (AVFrame*)&s->picture;
     int i, h, w, n, linesize, depth, maxval;
     const char *tuple_type;
     uint8_t *ptr;
 
     if (buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200) {
         av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
         return -1;
     }
 
     *p           = *pict;

     p->pict_type = AV_PICTURE_TYPE_I;

     p->key_frame = 1;
 
     s->bytestream_start =
     s->bytestream       = outbuf;
     s->bytestream_end   = outbuf+buf_size;
 
     h = avctx->height;
     w = avctx->width;
     switch (avctx->pix_fmt) {
     case PIX_FMT_MONOWHITE:
         n          = (w + 7) >> 3;
         depth      = 1;
         maxval     = 1;
         tuple_type = "BLACKANDWHITE";
         break;
     case PIX_FMT_GRAY8:
         n          = w;
         depth      = 1;
         maxval     = 255;
         tuple_type = "GRAYSCALE";
         break;
     case PIX_FMT_RGB24:
         n          = w * 3;
         depth      = 3;
         maxval     = 255;
         tuple_type = "RGB";
         break;
     case PIX_FMT_RGB32:
         n          = w * 4;
         depth      = 4;
         maxval     = 255;
         tuple_type = "RGB_ALPHA";
         break;
     default:
         return -1;
     }
     snprintf(s->bytestream, s->bytestream_end - s->bytestream,
              "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLETYPE %s\nENDHDR\n",
              w, h, depth, maxval, tuple_type);
     s->bytestream += strlen(s->bytestream);
 
     ptr      = p->data[0];
     linesize = p->linesize[0];
 
     if (avctx->pix_fmt == PIX_FMT_RGB32) {
         int j;
         unsigned int v;
 
         for (i = 0; i < h; i++) {
             for (j = 0; j < w; j++) {
                 v = ((uint32_t *)ptr)[j];
                 bytestream_put_be24(&s->bytestream, v);
                 *s->bytestream++ = v >> 24;
             }
             ptr += linesize;
         }
     } else {
         for (i = 0; i < h; i++) {
             memcpy(s->bytestream, ptr, n);
             s->bytestream += n;
             ptr           += linesize;
         }
     }
     return s->bytestream - s->bytestream_start;
 }
 
 

 AVCodec ff_pam_encoder = {

     "pam",

     AVMEDIA_TYPE_VIDEO,

     CODEC_ID_PAM,
     sizeof(PNMContext),
     ff_pnm_init,
     pam_encode_frame,
     .pix_fmts  = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, PIX_FMT_NONE},
     .long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
 };