| 318888f8 |
/*
* 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" |
| 594d4d5d |
#include "internal.h" |
| 63538a96 |
#include "put_bits.h" |
| 318888f8 |
#include "pnm.h"
static int pnm_decode_frame(AVCodecContext *avctx, void *data, |
| df9b9567 |
int *got_frame, AVPacket *avpkt) |
| 318888f8 |
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
PNMContext * const s = avctx->priv_data;
AVFrame *picture = data; |
| 562b6c74 |
AVFrame * const p = &s->picture; |
| 4a745b41 |
int i, j, n, linesize, h, upgrade = 0, is_mono = 0; |
| 318888f8 |
unsigned char *ptr; |
| e2820d99 |
int components, sample_len, ret; |
| 318888f8 |
s->bytestream_start = |
| 07cdd394 |
s->bytestream = (uint8_t *)buf;
s->bytestream_end = (uint8_t *)buf + buf_size; |
| 318888f8 |
|
| 380242ca |
if ((ret = ff_pnm_decode_header(avctx, s)) < 0)
return ret; |
| 318888f8 |
if (p->data[0])
avctx->release_buffer(avctx, p);
p->reference = 0; |
| 874c5b02 |
if ((ret = ff_get_buffer(avctx, p)) < 0) { |
| 318888f8 |
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); |
| e2820d99 |
return ret; |
| 318888f8 |
} |
| ce5e49b0 |
p->pict_type = AV_PICTURE_TYPE_I; |
| 318888f8 |
p->key_frame = 1;
switch (avctx->pix_fmt) {
default: |
| 380242ca |
return AVERROR(EINVAL); |
| ac627b3d |
case AV_PIX_FMT_RGBA64BE: |
| 00430075 |
n = avctx->width * 8;
components=4;
sample_len=16;
goto do_read; |
| 716d413c |
case AV_PIX_FMT_RGB48BE: |
| 318888f8 |
n = avctx->width * 6; |
| 63538a96 |
components=3;
sample_len=16; |
| 318888f8 |
goto do_read; |
| ac627b3d |
case AV_PIX_FMT_RGBA: |
| b614c147 |
n = avctx->width * 4;
components=4;
sample_len=8;
goto do_read; |
| 716d413c |
case AV_PIX_FMT_RGB24: |
| 318888f8 |
n = avctx->width * 3; |
| 63538a96 |
components=3;
sample_len=8; |
| 318888f8 |
goto do_read; |
| 716d413c |
case AV_PIX_FMT_GRAY8: |
| 318888f8 |
n = avctx->width; |
| 63538a96 |
components=1;
sample_len=8; |
| 318888f8 |
if (s->maxval < 255)
upgrade = 1;
goto do_read; |
| ac627b3d |
case AV_PIX_FMT_GRAY8A: |
| 328e7932 |
n = avctx->width * 2;
components=2;
sample_len=8;
goto do_read; |
| 716d413c |
case AV_PIX_FMT_GRAY16BE:
case AV_PIX_FMT_GRAY16LE: |
| 318888f8 |
n = avctx->width * 2; |
| 63538a96 |
components=1;
sample_len=16; |
| 318888f8 |
if (s->maxval < 65535)
upgrade = 2;
goto do_read; |
| 716d413c |
case AV_PIX_FMT_MONOWHITE:
case AV_PIX_FMT_MONOBLACK: |
| 318888f8 |
n = (avctx->width + 7) >> 3; |
| 63538a96 |
components=1;
sample_len=1; |
| 4a745b41 |
is_mono = 1; |
| 318888f8 |
do_read:
ptr = p->data[0];
linesize = p->linesize[0];
if (s->bytestream + n * avctx->height > s->bytestream_end) |
| e2820d99 |
return AVERROR_INVALIDDATA; |
| d9b3097b |
if(s->type < 4 || (is_mono && s->type==7)){ |
| 63538a96 |
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; |
| d9b3097b |
if(s->type < 4) |
| 63538a96 |
while(s->bytestream < s->bytestream_end && (*s->bytestream < '0' || *s->bytestream > '9' ))
s->bytestream++;
if(s->bytestream >= s->bytestream_end) |
| e2820d99 |
return AVERROR_INVALIDDATA; |
| 4a745b41 |
if (is_mono) {
/* read a single digit */ |
| d9b3097b |
v = (*s->bytestream++)&1; |
| 4a745b41 |
} else { |
| 554d3ad7 |
/* read a sequence of digits */
do {
v = 10*v + c;
c = (*s->bytestream++) - '0';
} while (c <= 9); |
| 4a745b41 |
} |
| 63538a96 |
put_bits(&pb, sample_len, (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval);
}
flush_put_bits(&pb);
ptr+= linesize;
}
}else{ |
| 318888f8 |
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++) { |
| 8fc0162a |
v = av_be2ne16(((uint16_t *)s->bytestream)[j]); |
| 318888f8 |
((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
}
}
s->bytestream += n;
ptr += linesize;
} |
| 63538a96 |
} |
| 318888f8 |
break; |
| 716d413c |
case AV_PIX_FMT_YUV420P: |
| b5f536d2 |
case AV_PIX_FMT_YUV420P9BE:
case AV_PIX_FMT_YUV420P10BE: |
| 318888f8 |
{
unsigned char *ptr1, *ptr2;
n = avctx->width;
ptr = p->data[0];
linesize = p->linesize[0]; |
| b5f536d2 |
if (s->maxval >= 256)
n *= 2; |
| 318888f8 |
if (s->bytestream + n * avctx->height * 3 / 2 > s->bytestream_end) |
| e2820d99 |
return AVERROR_INVALIDDATA; |
| 318888f8 |
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; |
| b5f536d2 |
case AV_PIX_FMT_YUV420P16:
{
uint16_t *ptr1, *ptr2;
const int f = (65535 * 32768 + s->maxval / 2) / s->maxval;
unsigned int j, v;
n = avctx->width * 2;
ptr = p->data[0];
linesize = p->linesize[0];
if (s->bytestream + n * avctx->height * 3 / 2 > s->bytestream_end)
return AVERROR_INVALIDDATA;
for (i = 0; i < avctx->height; i++) {
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;
}
ptr1 = (uint16_t*)p->data[1];
ptr2 = (uint16_t*)p->data[2];
n >>= 1;
h = avctx->height >> 1;
for (i = 0; i < h; i++) {
for (j = 0; j < n / 2; j++) {
v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
ptr1[j] = (v * f + 16384) >> 15;
}
s->bytestream += n;
for (j = 0; j < n / 2; j++) {
v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
ptr2[j] = (v * f + 16384) >> 15;
}
s->bytestream += n;
ptr1 += p->linesize[1] / 2;
ptr2 += p->linesize[2] / 2;
}
}
break; |
| 318888f8 |
} |
| 324deaa2 |
*picture = s->picture; |
| df9b9567 |
*got_frame = 1; |
| 318888f8 |
return s->bytestream - s->bytestream_start;
}
#if CONFIG_PGM_DECODER |
| e7e2df27 |
AVCodec ff_pgm_decoder = { |
| ec6402b7 |
.name = "pgm",
.type = AVMEDIA_TYPE_VIDEO, |
| 36ef5369 |
.id = AV_CODEC_ID_PGM, |
| ec6402b7 |
.priv_data_size = sizeof(PNMContext),
.init = ff_pnm_init,
.close = ff_pnm_end,
.decode = pnm_decode_frame,
.capabilities = CODEC_CAP_DR1, |
| 00c3b67b |
.long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"), |
| 318888f8 |
};
#endif
#if CONFIG_PGMYUV_DECODER |
| e7e2df27 |
AVCodec ff_pgmyuv_decoder = { |
| ec6402b7 |
.name = "pgmyuv",
.type = AVMEDIA_TYPE_VIDEO, |
| 36ef5369 |
.id = AV_CODEC_ID_PGMYUV, |
| ec6402b7 |
.priv_data_size = sizeof(PNMContext),
.init = ff_pnm_init,
.close = ff_pnm_end,
.decode = pnm_decode_frame,
.capabilities = CODEC_CAP_DR1, |
| 00c3b67b |
.long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"), |
| 318888f8 |
};
#endif
#if CONFIG_PPM_DECODER |
| e7e2df27 |
AVCodec ff_ppm_decoder = { |
| ec6402b7 |
.name = "ppm",
.type = AVMEDIA_TYPE_VIDEO, |
| 36ef5369 |
.id = AV_CODEC_ID_PPM, |
| ec6402b7 |
.priv_data_size = sizeof(PNMContext),
.init = ff_pnm_init,
.close = ff_pnm_end,
.decode = pnm_decode_frame,
.capabilities = CODEC_CAP_DR1, |
| 00c3b67b |
.long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"), |
| 318888f8 |
};
#endif
#if CONFIG_PBM_DECODER |
| e7e2df27 |
AVCodec ff_pbm_decoder = { |
| ec6402b7 |
.name = "pbm",
.type = AVMEDIA_TYPE_VIDEO, |
| 36ef5369 |
.id = AV_CODEC_ID_PBM, |
| ec6402b7 |
.priv_data_size = sizeof(PNMContext),
.init = ff_pnm_init,
.close = ff_pnm_end,
.decode = pnm_decode_frame,
.capabilities = CODEC_CAP_DR1, |
| 00c3b67b |
.long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"), |
| 318888f8 |
};
#endif
#if CONFIG_PAM_DECODER |
| e7e2df27 |
AVCodec ff_pam_decoder = { |
| ec6402b7 |
.name = "pam",
.type = AVMEDIA_TYPE_VIDEO, |
| 36ef5369 |
.id = AV_CODEC_ID_PAM, |
| ec6402b7 |
.priv_data_size = sizeof(PNMContext),
.init = ff_pnm_init,
.close = ff_pnm_end,
.decode = pnm_decode_frame,
.capabilities = CODEC_CAP_DR1, |
| 00c3b67b |
.long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"), |
| 318888f8 |
};
#endif |