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/*
* 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_MONOBLACK:
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_GRAY16BE:
n = w * 2;
depth = 1;
maxval = 0xFFFF;
tuple_type = "GRAYSCALE";
break;
case PIX_FMT_GRAY8A:
n = w * 2;
depth = 2;
maxval = 255;
tuple_type = "GRAYSCALE_ALPHA";
break;
case PIX_FMT_RGB24:
n = w * 3;
depth = 3;
maxval = 255;
tuple_type = "RGB";
break;
case PIX_FMT_RGBA:
n = w * 4;
depth = 4;
maxval = 255;
tuple_type = "RGB_ALPHA";
break;
case PIX_FMT_RGB48BE:
n = w * 6;
depth = 3;
maxval = 0xFFFF;
tuple_type = "RGB";
break;
default:
return -1;
}
snprintf(s->bytestream, s->bytestream_end - s->bytestream,
"P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLTYPE %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_MONOBLACK){
int j;
for (i = 0; i < h; i++) {
for (j = 0; j < w; j++)
*s->bytestream++ = ptr[j >> 3] >> (7 - j & 7) & 1;
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 = {
.name = "pam",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_PAM,
.priv_data_size = sizeof(PNMContext),
.init = ff_pnm_init,
.encode = pam_encode_frame,
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGBA, PIX_FMT_RGB48BE, PIX_FMT_GRAY8, PIX_FMT_GRAY8A, PIX_FMT_GRAY16BE, PIX_FMT_MONOBLACK, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
};
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