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  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 "internal.h"
  24. #include "pnm.h"
  25.  
  26.  
  27. static int pam_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
  28.                             const AVFrame *p, int *got_packet)
  29. {
  30.     PNMContext *s     = avctx->priv_data;
  31.     int i, h, w, n, linesize, depth, maxval, ret;
  32.     const char *tuple_type;
  33.     uint8_t *ptr;
  34.  
  35.     h = avctx->height;
  36.     w = avctx->width;
  37.     switch (avctx->pix_fmt) {
  38.     case AV_PIX_FMT_MONOBLACK:
  39.         n          = w;
  40.         depth      = 1;
  41.         maxval     = 1;
  42.         tuple_type = "BLACKANDWHITE";
  43.         break;
  44.     case AV_PIX_FMT_GRAY8:
  45.         n          = w;
  46.         depth      = 1;
  47.         maxval     = 255;
  48.         tuple_type = "GRAYSCALE";
  49.         break;
  50.     case AV_PIX_FMT_GRAY16BE:
  51.         n          = w * 2;
  52.         depth      = 1;
  53.         maxval     = 0xFFFF;
  54.         tuple_type = "GRAYSCALE";
  55.         break;
  56.     case AV_PIX_FMT_GRAY8A:
  57.         n          = w * 2;
  58.         depth      = 2;
  59.         maxval     = 255;
  60.         tuple_type = "GRAYSCALE_ALPHA";
  61.         break;
  62.     case AV_PIX_FMT_RGB24:
  63.         n          = w * 3;
  64.         depth      = 3;
  65.         maxval     = 255;
  66.         tuple_type = "RGB";
  67.         break;
  68.     case AV_PIX_FMT_RGBA:
  69.         n          = w * 4;
  70.         depth      = 4;
  71.         maxval     = 255;
  72.         tuple_type = "RGB_ALPHA";
  73.         break;
  74.     case AV_PIX_FMT_RGB48BE:
  75.         n          = w * 6;
  76.         depth      = 3;
  77.         maxval     = 0xFFFF;
  78.         tuple_type = "RGB";
  79.         break;
  80.     case AV_PIX_FMT_RGBA64BE:
  81.         n          = w * 8;
  82.         depth      = 4;
  83.         maxval     = 0xFFFF;
  84.         tuple_type = "RGB_ALPHA";
  85.         break;
  86.     default:
  87.         return -1;
  88.     }
  89.  
  90.     if ((ret = ff_alloc_packet2(avctx, pkt, n*h + 200)) < 0)
  91.         return ret;
  92.  
  93.     s->bytestream_start =
  94.     s->bytestream       = pkt->data;
  95.     s->bytestream_end   = pkt->data + pkt->size;
  96.  
  97.     snprintf(s->bytestream, s->bytestream_end - s->bytestream,
  98.              "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLTYPE %s\nENDHDR\n",
  99.              w, h, depth, maxval, tuple_type);
  100.     s->bytestream += strlen(s->bytestream);
  101.  
  102.     ptr      = p->data[0];
  103.     linesize = p->linesize[0];
  104.  
  105.     if (avctx->pix_fmt == AV_PIX_FMT_MONOBLACK){
  106.         int j;
  107.         for (i = 0; i < h; i++) {
  108.             for (j = 0; j < w; j++)
  109.                 *s->bytestream++ = ptr[j >> 3] >> (7 - j & 7) & 1;
  110.             ptr += linesize;
  111.         }
  112.     } else {
  113.         for (i = 0; i < h; i++) {
  114.             memcpy(s->bytestream, ptr, n);
  115.             s->bytestream += n;
  116.             ptr           += linesize;
  117.         }
  118.     }
  119.  
  120.     pkt->size   = s->bytestream - s->bytestream_start;
  121.     pkt->flags |= AV_PKT_FLAG_KEY;
  122.     *got_packet = 1;
  123.     return 0;
  124. }
  125.  
  126.  
  127. AVCodec ff_pam_encoder = {
  128.     .name           = "pam",
  129.     .long_name      = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
  130.     .type           = AVMEDIA_TYPE_VIDEO,
  131.     .id             = AV_CODEC_ID_PAM,
  132.     .priv_data_size = sizeof(PNMContext),
  133.     .encode2        = pam_encode_frame,
  134.     .pix_fmts       = (const enum AVPixelFormat[]){
  135.         AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_RGBA64BE, AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_NONE
  136.     },
  137. };
  138.