mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
6101e5322f
* qatar/master: rtpdec_asf: Set the no_resync_search option for the chained asf demuxer asfdec: Add an option for not searching for the packet markers cosmetics: Clean up the tiffenc pix_fmts declaration to match the style of others cosmetics: Align codec declarations cosmetics: Convert mimic.c to utf-8 avconv: remove an unused function parameter. avconv: remove now pointless variables. avconv: drop support for building without libavfilter. nellymoserenc: fix crash due to memsetting the wrong area. libavformat: Only require first packet to be known for audio/video streams avplay: Don't try to scale timestamps if the tb isn't set Conflicts: Changelog configure ffmpeg.c libavcodec/aacenc.c libavcodec/bmpenc.c libavcodec/dnxhddec.c libavcodec/dnxhdenc.c libavcodec/ffv1.c libavcodec/flacenc.c libavcodec/fraps.c libavcodec/huffyuv.c libavcodec/libopenjpegdec.c libavcodec/mpeg12enc.c libavcodec/mpeg4videodec.c libavcodec/pamenc.c libavcodec/pgssubdec.c libavcodec/pngenc.c libavcodec/qtrleenc.c libavcodec/rawdec.c libavcodec/sgienc.c libavcodec/tiffenc.c libavcodec/v210dec.c libavcodec/wmv2dec.c libavformat/utils.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
263 lines
8.2 KiB
C
263 lines
8.2 KiB
C
/*
|
|
* 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 "avcodec.h"
|
|
#include "put_bits.h"
|
|
#include "pnm.h"
|
|
|
|
|
|
static int pnm_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *data_size, AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
PNMContext * const s = avctx->priv_data;
|
|
AVFrame *picture = data;
|
|
AVFrame * const p = &s->picture;
|
|
int i, j, n, linesize, h, upgrade = 0, is_mono = 0;
|
|
unsigned char *ptr;
|
|
int components, sample_len;
|
|
|
|
s->bytestream_start =
|
|
s->bytestream = buf;
|
|
s->bytestream_end = buf + buf_size;
|
|
|
|
if (ff_pnm_decode_header(avctx, s) < 0)
|
|
return -1;
|
|
|
|
if (p->data[0])
|
|
avctx->release_buffer(avctx, p);
|
|
|
|
p->reference = 0;
|
|
if (avctx->get_buffer(avctx, p) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
p->pict_type = AV_PICTURE_TYPE_I;
|
|
p->key_frame = 1;
|
|
|
|
switch (avctx->pix_fmt) {
|
|
default:
|
|
return -1;
|
|
case PIX_FMT_RGBA64BE:
|
|
n = avctx->width * 8;
|
|
components=4;
|
|
sample_len=16;
|
|
goto do_read;
|
|
case PIX_FMT_RGB48BE:
|
|
n = avctx->width * 6;
|
|
components=3;
|
|
sample_len=16;
|
|
goto do_read;
|
|
case PIX_FMT_RGBA:
|
|
n = avctx->width * 4;
|
|
components=4;
|
|
sample_len=8;
|
|
goto do_read;
|
|
case PIX_FMT_RGB24:
|
|
n = avctx->width * 3;
|
|
components=3;
|
|
sample_len=8;
|
|
goto do_read;
|
|
case PIX_FMT_GRAY8:
|
|
n = avctx->width;
|
|
components=1;
|
|
sample_len=8;
|
|
if (s->maxval < 255)
|
|
upgrade = 1;
|
|
goto do_read;
|
|
case PIX_FMT_GRAY8A:
|
|
n = avctx->width * 2;
|
|
components=2;
|
|
sample_len=8;
|
|
goto do_read;
|
|
case PIX_FMT_GRAY16BE:
|
|
case PIX_FMT_GRAY16LE:
|
|
n = avctx->width * 2;
|
|
components=1;
|
|
sample_len=16;
|
|
if (s->maxval < 65535)
|
|
upgrade = 2;
|
|
goto do_read;
|
|
case PIX_FMT_MONOWHITE:
|
|
case PIX_FMT_MONOBLACK:
|
|
n = (avctx->width + 7) >> 3;
|
|
components=1;
|
|
sample_len=1;
|
|
is_mono = 1;
|
|
do_read:
|
|
ptr = p->data[0];
|
|
linesize = p->linesize[0];
|
|
if (s->bytestream + n * avctx->height > s->bytestream_end)
|
|
return -1;
|
|
if(s->type < 4 || (is_mono && s->type==7)){
|
|
for (i=0; i<avctx->height; i++) {
|
|
PutBitContext pb;
|
|
init_put_bits(&pb, ptr, linesize);
|
|
for(j=0; j<avctx->width * components; j++){
|
|
unsigned int c=0;
|
|
int v=0;
|
|
if(s->type < 4)
|
|
while(s->bytestream < s->bytestream_end && (*s->bytestream < '0' || *s->bytestream > '9' ))
|
|
s->bytestream++;
|
|
if(s->bytestream >= s->bytestream_end)
|
|
return -1;
|
|
if (is_mono) {
|
|
/* read a single digit */
|
|
v = (*s->bytestream++)&1;
|
|
} else {
|
|
/* read a sequence of digits */
|
|
do {
|
|
v = 10*v + c;
|
|
c = (*s->bytestream++) - '0';
|
|
} while (c <= 9);
|
|
}
|
|
put_bits(&pb, sample_len, (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval);
|
|
}
|
|
flush_put_bits(&pb);
|
|
ptr+= linesize;
|
|
}
|
|
}else{
|
|
for (i = 0; i < avctx->height; i++) {
|
|
if (!upgrade)
|
|
memcpy(ptr, s->bytestream, n);
|
|
else if (upgrade == 1) {
|
|
unsigned int j, f = (255 * 128 + s->maxval / 2) / s->maxval;
|
|
for (j = 0; j < n; j++)
|
|
ptr[j] = (s->bytestream[j] * f + 64) >> 7;
|
|
} else if (upgrade == 2) {
|
|
unsigned int j, v, f = (65535 * 32768 + s->maxval / 2) / s->maxval;
|
|
for (j = 0; j < n / 2; j++) {
|
|
v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
|
|
((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
|
|
}
|
|
}
|
|
s->bytestream += n;
|
|
ptr += linesize;
|
|
}
|
|
}
|
|
break;
|
|
case PIX_FMT_YUV420P:
|
|
{
|
|
unsigned char *ptr1, *ptr2;
|
|
|
|
n = avctx->width;
|
|
ptr = p->data[0];
|
|
linesize = p->linesize[0];
|
|
if (s->bytestream + n * avctx->height * 3 / 2 > s->bytestream_end)
|
|
return -1;
|
|
for (i = 0; i < avctx->height; i++) {
|
|
memcpy(ptr, s->bytestream, n);
|
|
s->bytestream += n;
|
|
ptr += linesize;
|
|
}
|
|
ptr1 = p->data[1];
|
|
ptr2 = p->data[2];
|
|
n >>= 1;
|
|
h = avctx->height >> 1;
|
|
for (i = 0; i < h; i++) {
|
|
memcpy(ptr1, s->bytestream, n);
|
|
s->bytestream += n;
|
|
memcpy(ptr2, s->bytestream, n);
|
|
s->bytestream += n;
|
|
ptr1 += p->linesize[1];
|
|
ptr2 += p->linesize[2];
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
*picture = s->picture;
|
|
*data_size = sizeof(AVPicture);
|
|
|
|
return s->bytestream - s->bytestream_start;
|
|
}
|
|
|
|
|
|
#if CONFIG_PGM_DECODER
|
|
AVCodec ff_pgm_decoder = {
|
|
.name = "pgm",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_PGM,
|
|
.priv_data_size = sizeof(PNMContext),
|
|
.init = ff_pnm_init,
|
|
.close = ff_pnm_end,
|
|
.decode = pnm_decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_PGMYUV_DECODER
|
|
AVCodec ff_pgmyuv_decoder = {
|
|
.name = "pgmyuv",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_PGMYUV,
|
|
.priv_data_size = sizeof(PNMContext),
|
|
.init = ff_pnm_init,
|
|
.close = ff_pnm_end,
|
|
.decode = pnm_decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_PPM_DECODER
|
|
AVCodec ff_ppm_decoder = {
|
|
.name = "ppm",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_PPM,
|
|
.priv_data_size = sizeof(PNMContext),
|
|
.init = ff_pnm_init,
|
|
.close = ff_pnm_end,
|
|
.decode = pnm_decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_PBM_DECODER
|
|
AVCodec ff_pbm_decoder = {
|
|
.name = "pbm",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_PBM,
|
|
.priv_data_size = sizeof(PNMContext),
|
|
.init = ff_pnm_init,
|
|
.close = ff_pnm_end,
|
|
.decode = pnm_decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_PAM_DECODER
|
|
AVCodec ff_pam_decoder = {
|
|
.name = "pam",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_PAM,
|
|
.priv_data_size = sizeof(PNMContext),
|
|
.init = ff_pnm_init,
|
|
.close = ff_pnm_end,
|
|
.decode = pnm_decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
|
|
};
|
|
#endif
|