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FFmpeg/libavcodec/pnmdec.c
Clément Bœsch 1ec94b0f06 lavc: factorize ff_{thread_,re,}get_buffer error messages. 
Coccinelle profile used:

  @@
  expression r, ctx, f, loglevel, str, flags;
  @@

  -if ((r = ff_get_buffer(ctx, f, flags)) < 0) {
  -    av_log(ctx, loglevel, str);
  -    return r;
  -}
  +if ((r = ff_get_buffer(ctx, f, flags)) < 0)
  +    return r;

  @@
  expression r, ctx, f, loglevel, str;
  @@

  -if ((r = ff_reget_buffer(ctx, f)) < 0) {
  -    av_log(ctx, loglevel, str);
  -    return r;
  -}
  +if ((r = ff_reget_buffer(ctx, f)) < 0)
  +    return r;

  @@
  expression r, ctx, f, loglevel, str, flags;
  @@

  -if ((r = ff_thread_get_buffer(ctx, f, flags)) < 0) {
  -    av_log(ctx, loglevel, str);
  -    return r;
  -}
  +if ((r = ff_thread_get_buffer(ctx, f, flags)) < 0)
  +    return r;

...along with some manual patches for the remaining ones.
2013-03-13 19:00:10 +01:00

291 lines
9.4 KiB
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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 "avcodec.h"
#include "internal.h"
#include "put_bits.h"
#include "pnm.h"
static int pnm_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
PNMContext * const s = avctx->priv_data;
AVFrame * const p = data;
int i, j, n, linesize, h, upgrade = 0, is_mono = 0;
unsigned char *ptr;
int components, sample_len, ret;
s->bytestream_start =
s->bytestream = (uint8_t *)buf;
s->bytestream_end = (uint8_t *)buf + buf_size;
if ((ret = ff_pnm_decode_header(avctx, s)) < 0)
return ret;
if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
return ret;
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
switch (avctx->pix_fmt) {
default:
return AVERROR(EINVAL);
case AV_PIX_FMT_RGBA64BE:
n = avctx->width * 8;
components=4;
sample_len=16;
goto do_read;
case AV_PIX_FMT_RGB48BE:
n = avctx->width * 6;
components=3;
sample_len=16;
goto do_read;
case AV_PIX_FMT_RGBA:
n = avctx->width * 4;
components=4;
sample_len=8;
goto do_read;
case AV_PIX_FMT_RGB24:
n = avctx->width * 3;
components=3;
sample_len=8;
goto do_read;
case AV_PIX_FMT_GRAY8:
n = avctx->width;
components=1;
sample_len=8;
if (s->maxval < 255)
upgrade = 1;
goto do_read;
case AV_PIX_FMT_GRAY8A:
n = avctx->width * 2;
components=2;
sample_len=8;
goto do_read;
case AV_PIX_FMT_GRAY16BE:
case AV_PIX_FMT_GRAY16LE:
n = avctx->width * 2;
components=1;
sample_len=16;
if (s->maxval < 65535)
upgrade = 2;
goto do_read;
case AV_PIX_FMT_MONOWHITE:
case AV_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 AVERROR_INVALIDDATA;
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 AVERROR_INVALIDDATA;
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 AV_PIX_FMT_YUV420P:
case AV_PIX_FMT_YUV420P9BE:
case AV_PIX_FMT_YUV420P10BE:
{
unsigned char *ptr1, *ptr2;
n = avctx->width;
ptr = p->data[0];
linesize = p->linesize[0];
if (s->maxval >= 256)
n *= 2;
if (s->bytestream + n * avctx->height * 3 / 2 > s->bytestream_end)
return AVERROR_INVALIDDATA;
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;
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;
}
*got_frame = 1;
return s->bytestream - s->bytestream_start;
}
#if CONFIG_PGM_DECODER
AVCodec ff_pgm_decoder = {
.name = "pgm",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_PGM,
.priv_data_size = sizeof(PNMContext),
.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 = AV_CODEC_ID_PGMYUV,
.priv_data_size = sizeof(PNMContext),
.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 = AV_CODEC_ID_PPM,
.priv_data_size = sizeof(PNMContext),
.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 = AV_CODEC_ID_PBM,
.priv_data_size = sizeof(PNMContext),
.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 = AV_CODEC_ID_PAM,
.priv_data_size = sizeof(PNMContext),
.decode = pnm_decode_frame,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
};
#endif
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