mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-16 04:15:05 +00:00
177 lines
5.4 KiB
C
177 lines
5.4 KiB
C
/*
|
|
* PNM image format
|
|
* Copyright (c) 2002, 2003 Fabrice Bellard
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; 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 "internal.h"
|
|
#include "pnm.h"
|
|
|
|
|
|
static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
|
|
const AVFrame *pict, int *got_packet)
|
|
{
|
|
PNMContext *s = avctx->priv_data;
|
|
AVFrame * const p = &s->picture;
|
|
int i, h, h1, c, n, linesize, ret;
|
|
uint8_t *ptr, *ptr1, *ptr2;
|
|
|
|
if ((ret = ff_alloc_packet(pkt, avpicture_get_size(avctx->pix_fmt,
|
|
avctx->width,
|
|
avctx->height) + 200)) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
|
|
return ret;
|
|
}
|
|
|
|
*p = *pict;
|
|
p->pict_type = AV_PICTURE_TYPE_I;
|
|
p->key_frame = 1;
|
|
|
|
s->bytestream_start =
|
|
s->bytestream = pkt->data;
|
|
s->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:
|
|
c = '5';
|
|
n = avctx->width;
|
|
h1 = (h * 3) / 2;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
snprintf(s->bytestream, s->bytestream_end - s->bytestream,
|
|
"P%c\n%d %d\n", c, avctx->width, h1);
|
|
s->bytestream += strlen(s->bytestream);
|
|
if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE) {
|
|
snprintf(s->bytestream, s->bytestream_end - s->bytestream,
|
|
"%d\n", (avctx->pix_fmt != AV_PIX_FMT_GRAY16BE && avctx->pix_fmt != AV_PIX_FMT_RGB48BE) ? 255 : 65535);
|
|
s->bytestream += strlen(s->bytestream);
|
|
}
|
|
|
|
ptr = p->data[0];
|
|
linesize = p->linesize[0];
|
|
for (i = 0; i < h; i++) {
|
|
memcpy(s->bytestream, ptr, n);
|
|
s->bytestream += n;
|
|
ptr += linesize;
|
|
}
|
|
|
|
if (avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
|
|
h >>= 1;
|
|
n >>= 1;
|
|
ptr1 = p->data[1];
|
|
ptr2 = p->data[2];
|
|
for (i = 0; i < h; i++) {
|
|
memcpy(s->bytestream, ptr1, n);
|
|
s->bytestream += n;
|
|
memcpy(s->bytestream, ptr2, n);
|
|
s->bytestream += n;
|
|
ptr1 += p->linesize[1];
|
|
ptr2 += p->linesize[2];
|
|
}
|
|
}
|
|
pkt->size = s->bytestream - s->bytestream_start;
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
*got_packet = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
#if CONFIG_PGM_ENCODER
|
|
AVCodec ff_pgm_encoder = {
|
|
.name = "pgm",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_PGM,
|
|
.priv_data_size = sizeof(PNMContext),
|
|
.init = ff_pnm_init,
|
|
.encode2 = pnm_encode_frame,
|
|
.pix_fmts = (const enum AVPixelFormat[]){
|
|
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE
|
|
},
|
|
.long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_PGMYUV_ENCODER
|
|
AVCodec ff_pgmyuv_encoder = {
|
|
.name = "pgmyuv",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_PGMYUV,
|
|
.priv_data_size = sizeof(PNMContext),
|
|
.init = ff_pnm_init,
|
|
.encode2 = pnm_encode_frame,
|
|
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
|
|
.long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_PPM_ENCODER
|
|
AVCodec ff_ppm_encoder = {
|
|
.name = "ppm",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_PPM,
|
|
.priv_data_size = sizeof(PNMContext),
|
|
.init = ff_pnm_init,
|
|
.encode2 = pnm_encode_frame,
|
|
.pix_fmts = (const enum AVPixelFormat[]){
|
|
AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_NONE
|
|
},
|
|
.long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_PBM_ENCODER
|
|
AVCodec ff_pbm_encoder = {
|
|
.name = "pbm",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_PBM,
|
|
.priv_data_size = sizeof(PNMContext),
|
|
.init = ff_pnm_init,
|
|
.encode2 = pnm_encode_frame,
|
|
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_MONOWHITE,
|
|
AV_PIX_FMT_NONE },
|
|
.long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
|
|
};
|
|
#endif
|