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FFmpeg/libavcodec/pamenc.c
Michael Niedermayer 37945584bf Merge commit 'afa21a12bf084f905187615706b0a8d92bc98661'
* commit 'afa21a12bf084f905187615706b0a8d92bc98661':
  p*menc: use the AVFrame API properly.

Conflicts:
	libavcodec/Makefile
	libavcodec/pamenc.c
	libavcodec/pnmenc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2013-12-09 12:54:59 +01:00

154 lines
4.4 KiB
C

/*
* 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 "internal.h"
static int pam_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *p, int *got_packet)
{
uint8_t *bytestream_start, *bytestream, *bytestream_end;
int i, h, w, n, linesize, depth, maxval, ret;
const char *tuple_type;
uint8_t *ptr;
h = avctx->height;
w = avctx->width;
switch (avctx->pix_fmt) {
case AV_PIX_FMT_MONOBLACK:
n = w;
depth = 1;
maxval = 1;
tuple_type = "BLACKANDWHITE";
break;
case AV_PIX_FMT_GRAY8:
n = w;
depth = 1;
maxval = 255;
tuple_type = "GRAYSCALE";
break;
case AV_PIX_FMT_GRAY16BE:
n = w * 2;
depth = 1;
maxval = 0xFFFF;
tuple_type = "GRAYSCALE";
break;
case AV_PIX_FMT_GRAY8A:
n = w * 2;
depth = 2;
maxval = 255;
tuple_type = "GRAYSCALE_ALPHA";
break;
case AV_PIX_FMT_RGB24:
n = w * 3;
depth = 3;
maxval = 255;
tuple_type = "RGB";
break;
case AV_PIX_FMT_RGBA:
n = w * 4;
depth = 4;
maxval = 255;
tuple_type = "RGB_ALPHA";
break;
case AV_PIX_FMT_RGB48BE:
n = w * 6;
depth = 3;
maxval = 0xFFFF;
tuple_type = "RGB";
break;
case AV_PIX_FMT_RGBA64BE:
n = w * 8;
depth = 4;
maxval = 0xFFFF;
tuple_type = "RGB_ALPHA";
break;
default:
return -1;
}
if ((ret = ff_alloc_packet2(avctx, pkt, n*h + 200)) < 0)
return ret;
bytestream_start =
bytestream = pkt->data;
bytestream_end = pkt->data + pkt->size;
snprintf(bytestream, bytestream_end - bytestream,
"P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLTYPE %s\nENDHDR\n",
w, h, depth, maxval, tuple_type);
bytestream += strlen(bytestream);
ptr = p->data[0];
linesize = p->linesize[0];
if (avctx->pix_fmt == AV_PIX_FMT_MONOBLACK){
int j;
for (i = 0; i < h; i++) {
for (j = 0; j < w; j++)
*bytestream++ = ptr[j >> 3] >> (7 - j & 7) & 1;
ptr += linesize;
}
} else {
for (i = 0; i < h; i++) {
memcpy(bytestream, ptr, n);
bytestream += n;
ptr += linesize;
}
}
pkt->size = bytestream - bytestream_start;
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
static av_cold int pam_encode_init(AVCodecContext *avctx)
{
avctx->coded_frame = av_frame_alloc();
if (!avctx->coded_frame)
return AVERROR(ENOMEM);
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
avctx->coded_frame->key_frame = 1;
return 0;
}
static av_cold int pam_encode_close(AVCodecContext *avctx)
{
av_frame_free(&avctx->coded_frame);
return 0;
}
AVCodec ff_pam_encoder = {
.name = "pam",
.long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_PAM,
.init = pam_encode_init,
.close = pam_encode_close,
.encode2 = pam_encode_frame,
.pix_fmts = (const enum AVPixelFormat[]){
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
},
};