yading@10: /*
yading@10:  * PAM image format
yading@10:  * Copyright (c) 2002, 2003 Fabrice Bellard
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "internal.h"
yading@10: #include "pnm.h"
yading@10: 
yading@10: 
yading@10: static int pam_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
yading@10:                             const AVFrame *pict, int *got_packet)
yading@10: {
yading@10:     PNMContext *s     = avctx->priv_data;
yading@10:     AVFrame * const p = &s->picture;
yading@10:     int i, h, w, n, linesize, depth, maxval, ret;
yading@10:     const char *tuple_type;
yading@10:     uint8_t *ptr;
yading@10: 
yading@10:     h = avctx->height;
yading@10:     w = avctx->width;
yading@10:     switch (avctx->pix_fmt) {
yading@10:     case AV_PIX_FMT_MONOBLACK:
yading@10:         n          = w;
yading@10:         depth      = 1;
yading@10:         maxval     = 1;
yading@10:         tuple_type = "BLACKANDWHITE";
yading@10:         break;
yading@10:     case AV_PIX_FMT_GRAY8:
yading@10:         n          = w;
yading@10:         depth      = 1;
yading@10:         maxval     = 255;
yading@10:         tuple_type = "GRAYSCALE";
yading@10:         break;
yading@10:     case AV_PIX_FMT_GRAY16BE:
yading@10:         n          = w * 2;
yading@10:         depth      = 1;
yading@10:         maxval     = 0xFFFF;
yading@10:         tuple_type = "GRAYSCALE";
yading@10:         break;
yading@10:     case AV_PIX_FMT_GRAY8A:
yading@10:         n          = w * 2;
yading@10:         depth      = 2;
yading@10:         maxval     = 255;
yading@10:         tuple_type = "GRAYSCALE_ALPHA";
yading@10:         break;
yading@10:     case AV_PIX_FMT_RGB24:
yading@10:         n          = w * 3;
yading@10:         depth      = 3;
yading@10:         maxval     = 255;
yading@10:         tuple_type = "RGB";
yading@10:         break;
yading@10:     case AV_PIX_FMT_RGBA:
yading@10:         n          = w * 4;
yading@10:         depth      = 4;
yading@10:         maxval     = 255;
yading@10:         tuple_type = "RGB_ALPHA";
yading@10:         break;
yading@10:     case AV_PIX_FMT_RGB48BE:
yading@10:         n          = w * 6;
yading@10:         depth      = 3;
yading@10:         maxval     = 0xFFFF;
yading@10:         tuple_type = "RGB";
yading@10:         break;
yading@10:     case AV_PIX_FMT_RGBA64BE:
yading@10:         n          = w * 8;
yading@10:         depth      = 4;
yading@10:         maxval     = 0xFFFF;
yading@10:         tuple_type = "RGB_ALPHA";
yading@10:         break;
yading@10:     default:
yading@10:         return -1;
yading@10:     }
yading@10: 
yading@10:     if ((ret = ff_alloc_packet2(avctx, pkt, n*h + 200)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     *p           = *pict;
yading@10:     p->pict_type = AV_PICTURE_TYPE_I;
yading@10:     p->key_frame = 1;
yading@10: 
yading@10:     s->bytestream_start =
yading@10:     s->bytestream       = pkt->data;
yading@10:     s->bytestream_end   = pkt->data + pkt->size;
yading@10: 
yading@10:     snprintf(s->bytestream, s->bytestream_end - s->bytestream,
yading@10:              "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLTYPE %s\nENDHDR\n",
yading@10:              w, h, depth, maxval, tuple_type);
yading@10:     s->bytestream += strlen(s->bytestream);
yading@10: 
yading@10:     ptr      = p->data[0];
yading@10:     linesize = p->linesize[0];
yading@10: 
yading@10:     if (avctx->pix_fmt == AV_PIX_FMT_MONOBLACK){
yading@10:         int j;
yading@10:         for (i = 0; i < h; i++) {
yading@10:             for (j = 0; j < w; j++)
yading@10:                 *s->bytestream++ = ptr[j >> 3] >> (7 - j & 7) & 1;
yading@10:             ptr += linesize;
yading@10:         }
yading@10:     } else {
yading@10:         for (i = 0; i < h; i++) {
yading@10:             memcpy(s->bytestream, ptr, n);
yading@10:             s->bytestream += n;
yading@10:             ptr           += linesize;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     pkt->size   = s->bytestream - s->bytestream_start;
yading@10:     pkt->flags |= AV_PKT_FLAG_KEY;
yading@10:     *got_packet = 1;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: 
yading@10: AVCodec ff_pam_encoder = {
yading@10:     .name           = "pam",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_PAM,
yading@10:     .priv_data_size = sizeof(PNMContext),
yading@10:     .init           = ff_pnm_init,
yading@10:     .encode2        = pam_encode_frame,
yading@10:     .pix_fmts       = (const enum AVPixelFormat[]){
yading@10:         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
yading@10:     },
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
yading@10: };