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Diffstat (limited to 'libavcodec/pnmdec.c')
-rw-r--r--libavcodec/pnmdec.c130
1 files changed, 82 insertions, 48 deletions
diff --git a/libavcodec/pnmdec.c b/libavcodec/pnmdec.c
index d23e2c0d3e..958c5e43b0 100644
--- a/libavcodec/pnmdec.c
+++ b/libavcodec/pnmdec.c
@@ -2,29 +2,39 @@
* PNM image format
* Copyright (c) 2002, 2003 Fabrice Bellard
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * 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 "bytestream.h"
#include "internal.h"
#include "put_bits.h"
#include "pnm.h"
+static void samplecpy(uint8_t *dst, const uint8_t *src, int n, int maxval)
+{
+ if (maxval <= 255) {
+ memcpy(dst, src, n);
+ } else {
+ int i;
+ for (i=0; i<n/2; i++) {
+ ((uint16_t *)dst)[i] = AV_RB16(src+2*i);
+ }
+ }
+}
static int pnm_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
@@ -33,36 +43,51 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
int buf_size = avpkt->size;
PNMContext * const s = avctx->priv_data;
AVFrame * const p = data;
- int i, j, n, linesize, h, upgrade = 0;
+ int i, j, k, n, linesize, h, upgrade = 0, is_mono = 0;
unsigned char *ptr;
int components, sample_len, ret;
s->bytestream_start =
- s->bytestream = buf;
- s->bytestream_end = buf + buf_size;
+ 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) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
return ret;
- }
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
+ avctx->bits_per_raw_sample = av_log2(s->maxval) + 1;
switch (avctx->pix_fmt) {
default:
return AVERROR(EINVAL);
- case AV_PIX_FMT_RGB48BE:
+ case AV_PIX_FMT_RGBA64:
+ n = avctx->width * 8;
+ components=4;
+ sample_len=16;
+ if (s->maxval < 65535)
+ upgrade = 2;
+ goto do_read;
+ case AV_PIX_FMT_RGB48:
n = avctx->width * 6;
components=3;
sample_len=16;
+ if (s->maxval < 65535)
+ upgrade = 2;
+ 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;
+ if (s->maxval < 255)
+ upgrade = 1;
goto do_read;
case AV_PIX_FMT_GRAY8:
n = avctx->width;
@@ -71,48 +96,75 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
if (s->maxval < 255)
upgrade = 1;
goto do_read;
- case AV_PIX_FMT_GRAY16BE:
- case AV_PIX_FMT_GRAY16LE:
+ case AV_PIX_FMT_GRAY8A:
+ n = avctx->width * 2;
+ components=2;
+ sample_len=8;
+ goto do_read;
+ case AV_PIX_FMT_GRAY16:
n = avctx->width * 2;
components=1;
sample_len=16;
if (s->maxval < 65535)
upgrade = 2;
goto do_read;
+ case AV_PIX_FMT_YA16:
+ n = avctx->width * 4;
+ components=2;
+ 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)
+ if (n * avctx->height > s->bytestream_end - s->bytestream)
return AVERROR_INVALIDDATA;
- if(s->type < 4){
+ 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;
- 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);
+ if (is_mono) {
+ /* read a single digit */
+ v = (*s->bytestream++)&1;
+ } else {
+ /* read a sequence of digits */
+ for (k = 0; k < 5 && c <= 9; k += 1) {
+ v = 10*v + c;
+ c = (*s->bytestream++) - '0';
+ }
+ if (v > s->maxval) {
+ av_log(avctx, AV_LOG_ERROR, "value %d larger than maxval %d\n", v, s->maxval);
+ return AVERROR_INVALIDDATA;
+ }
+ }
+ if (sample_len == 16) {
+ ((uint16_t*)ptr)[j] = (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval;
+ } else
+ put_bits(&pb, sample_len, (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval);
}
- flush_put_bits(&pb);
+ if (sample_len != 16)
+ flush_put_bits(&pb);
ptr+= linesize;
}
}else{
for (i = 0; i < avctx->height; i++) {
if (!upgrade)
- memcpy(ptr, s->bytestream, n);
+ samplecpy(ptr, s->bytestream, n, s->maxval);
else if (upgrade == 1) {
unsigned int j, f = (255 * 128 + s->maxval / 2) / s->maxval;
for (j = 0; j < n; j++)
@@ -130,8 +182,8 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
}
break;
case AV_PIX_FMT_YUV420P:
- case AV_PIX_FMT_YUV420P9BE:
- case AV_PIX_FMT_YUV420P10BE:
+ case AV_PIX_FMT_YUV420P9:
+ case AV_PIX_FMT_YUV420P10:
{
unsigned char *ptr1, *ptr2;
@@ -140,10 +192,10 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
linesize = p->linesize[0];
if (s->maxval >= 256)
n *= 2;
- if (s->bytestream + n * avctx->height * 3 / 2 > s->bytestream_end)
+ if (n * avctx->height * 3 / 2 > s->bytestream_end - s->bytestream)
return AVERROR_INVALIDDATA;
for (i = 0; i < avctx->height; i++) {
- memcpy(ptr, s->bytestream, n);
+ samplecpy(ptr, s->bytestream, n, s->maxval);
s->bytestream += n;
ptr += linesize;
}
@@ -152,9 +204,9 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
n >>= 1;
h = avctx->height >> 1;
for (i = 0; i < h; i++) {
- memcpy(ptr1, s->bytestream, n);
+ samplecpy(ptr1, s->bytestream, n, s->maxval);
s->bytestream += n;
- memcpy(ptr2, s->bytestream, n);
+ samplecpy(ptr2, s->bytestream, n, s->maxval);
s->bytestream += n;
ptr1 += p->linesize[1];
ptr2 += p->linesize[2];
@@ -170,7 +222,7 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
n = avctx->width * 2;
ptr = p->data[0];
linesize = p->linesize[0];
- if (s->bytestream + n * avctx->height * 3 / 2 > s->bytestream_end)
+ if (n * avctx->height * 3 / 2 > s->bytestream_end - s->bytestream)
return AVERROR_INVALIDDATA;
for (i = 0; i < avctx->height; i++) {
for (j = 0; j < n / 2; j++) {
@@ -202,24 +254,6 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
}
}
break;
- case AV_PIX_FMT_RGB32:
- ptr = p->data[0];
- linesize = p->linesize[0];
- if (s->bytestream + avctx->width * avctx->height * 4 > s->bytestream_end)
- return AVERROR_INVALIDDATA;
- for (i = 0; i < avctx->height; i++) {
- int j, r, g, b, a;
-
- for (j = 0; j < avctx->width; j++) {
- r = *s->bytestream++;
- g = *s->bytestream++;
- b = *s->bytestream++;
- a = *s->bytestream++;
- ((uint32_t *)ptr)[j] = (a << 24) | (r << 16) | (g << 8) | b;
- }
- ptr += linesize;
- }
- break;
}
*got_frame = 1;
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