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/*
* PNM 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 "libavutil/intreadwrite.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "internal.h"
static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *p, int *got_packet)
{
uint8_t *bytestream, *bytestream_start, *bytestream_end;
int i, h, h1, c, n, linesize, ret;
uint8_t *ptr, *ptr1, *ptr2;
int size = av_image_get_buffer_size(avctx->pix_fmt,
avctx->width, avctx->height, 1);
if ((ret = ff_alloc_packet2(avctx, pkt, size + 200, 0)) < 0)
return ret;
bytestream_start =
bytestream = pkt->data;
bytestream_end = pkt->data + pkt->size;
h = avctx->height;
h1 = h;
switch (avctx->pix_fmt) {
case AV_PIX_FMT_MONOWHITE:
c = '4';
n = (avctx->width + 7) >> 3;
break;
case AV_PIX_FMT_GRAY8:
c = '5';
n = avctx->width;
break;
case AV_PIX_FMT_GRAY16BE:
c = '5';
n = avctx->width * 2;
break;
case AV_PIX_FMT_RGB24:
c = '6';
n = avctx->width * 3;
break;
case AV_PIX_FMT_RGB48BE:
c = '6';
n = avctx->width * 6;
break;
case AV_PIX_FMT_YUV420P:
if (avctx->width & 1 || avctx->height & 1) {
av_log(avctx, AV_LOG_ERROR, "pgmyuv needs even width and height\n");
return AVERROR(EINVAL);
}
c = '5';
n = avctx->width;
h1 = (h * 3) / 2;
break;
case AV_PIX_FMT_YUV420P16BE:
c = '5';
n = avctx->width * 2;
h1 = (h * 3) / 2;
break;
case AV_PIX_FMT_GBRPF32:
c = 'F';
n = avctx->width * 4;
break;
default:
return -1;
}
snprintf(bytestream, bytestream_end - bytestream,
"P%c\n%d %d\n", c, avctx->width, h1);
bytestream += strlen(bytestream);
if (avctx->pix_fmt == AV_PIX_FMT_GBRPF32)
snprintf(bytestream, bytestream_end - bytestream,
"%f\n", avctx->pix_fmt == AV_PIX_FMT_GBRPF32BE ? 1.f: -1.f);
bytestream += strlen(bytestream);
if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE &&
avctx->pix_fmt != AV_PIX_FMT_GBRPF32) {
int maxdepth = (1 << av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth) - 1;
snprintf(bytestream, bytestream_end - bytestream,
"%d\n", maxdepth);
bytestream += strlen(bytestream);
}
if (avctx->pix_fmt == AV_PIX_FMT_GBRPF32) {
float *r = (float *)p->data[2];
float *g = (float *)p->data[0];
float *b = (float *)p->data[1];
for (int i = 0; i < avctx->height; i++) {
for (int j = 0; j < avctx->width; j++) {
AV_WN32(bytestream + 0, av_float2int(r[j]));
AV_WN32(bytestream + 4, av_float2int(g[j]));
AV_WN32(bytestream + 8, av_float2int(b[j]));
bytestream += 12;
}
r += p->linesize[2] / 4;
g += p->linesize[0] / 4;
b += p->linesize[1] / 4;
}
} else {
ptr = p->data[0];
linesize = p->linesize[0];
for (i = 0; i < h; i++) {
memcpy(bytestream, ptr, n);
bytestream += n;
ptr += linesize;
}
}
if (avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV420P16BE) {
h >>= 1;
n >>= 1;
ptr1 = p->data[1];
ptr2 = p->data[2];
for (i = 0; i < h; i++) {
memcpy(bytestream, ptr1, n);
bytestream += n;
memcpy(bytestream, ptr2, n);
bytestream += n;
ptr1 += p->linesize[1];
ptr2 += p->linesize[2];
}
}
pkt->size = bytestream - bytestream_start;
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
#if CONFIG_PGM_ENCODER
AVCodec ff_pgm_encoder = {
.name = "pgm",
.long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_PGM,
.encode2 = pnm_encode_frame,
.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE
},
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
#endif
#if CONFIG_PGMYUV_ENCODER
AVCodec ff_pgmyuv_encoder = {
.name = "pgmyuv",
.long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_PGMYUV,
.encode2 = pnm_encode_frame,
.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_NONE
},
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
#endif
#if CONFIG_PPM_ENCODER
AVCodec ff_ppm_encoder = {
.name = "ppm",
.long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_PPM,
.encode2 = pnm_encode_frame,
.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_NONE
},
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
#endif
#if CONFIG_PBM_ENCODER
AVCodec ff_pbm_encoder = {
.name = "pbm",
.long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_PBM,
.encode2 = pnm_encode_frame,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_MONOWHITE,
AV_PIX_FMT_NONE },
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
#endif
#if CONFIG_PFM_ENCODER
AVCodec ff_pfm_encoder = {
.name = "pfm",
.long_name = NULL_IF_CONFIG_SMALL("PFM (Portable FloatMap) image"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_PFM,
.encode2 = pnm_encode_frame,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_GBRPF32,
AV_PIX_FMT_NONE },
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
#endif
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