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pnm: return meaningful error codes.

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This commit is contained in:
Anton Khirnov 2012-11-16 11:45:34 +01:00
parent 84f2847de3
commit 380242ca50
2 changed files with 21 additions and 21 deletions
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22
libavcodec/pnm.c
View File

@ -65,7 +65,7 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
pnm_get(s, buf1, sizeof(buf1));
s->type= buf1[1]-'0';
if(buf1[0] != 'P')
return -1;
return AVERROR_INVALIDDATA;
if (s->type==1 || s->type==4) {
avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
@ -103,12 +103,12 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
} else if (!strcmp(buf1, "ENDHDR")) {
break;
} else {
return -1;
return AVERROR_INVALIDDATA;
}
}
/* check that all tags are present */
if (w <= 0 || h <= 0 || maxval <= 0 || depth <= 0 || tuple_type[0] == '\0' || av_image_check_size(w, h, 0, avctx))
return -1;
return AVERROR_INVALIDDATA;
avctx->width = w;
avctx->height = h;
@ -123,25 +123,25 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
} else {
av_log(avctx, AV_LOG_ERROR, "16-bit components are only supported for grayscale\n");
avctx->pix_fmt = AV_PIX_FMT_NONE;
return -1;
return AVERROR_INVALIDDATA;
}
} else if (depth == 4) {
avctx->pix_fmt = AV_PIX_FMT_RGB32;
} else {
return -1;
return AVERROR_INVALIDDATA;
}
return 0;
} else {
return -1;
return AVERROR_INVALIDDATA;
}
pnm_get(s, buf1, sizeof(buf1));
avctx->width = atoi(buf1);
if (avctx->width <= 0)
return -1;
return AVERROR_INVALIDDATA;
pnm_get(s, buf1, sizeof(buf1));
avctx->height = atoi(buf1);
if(av_image_check_size(avctx->width, avctx->height, 0, avctx))
return -1;
return AVERROR_INVALIDDATA;
if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE) {
pnm_get(s, buf1, sizeof(buf1));
s->maxval = atoi(buf1);
@ -160,7 +160,7 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
} else {
av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format\n");
avctx->pix_fmt = AV_PIX_FMT_NONE;
return -1;
return AVERROR_INVALIDDATA;
}
}
}else
@ -168,10 +168,10 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
/* more check if YUV420 */
if (avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
if ((avctx->width & 1) != 0)
return -1;
return AVERROR_INVALIDDATA;
h = (avctx->height * 2);
if ((h % 3) != 0)
return -1;
return AVERROR_INVALIDDATA;
h /= 3;
avctx->height = h;
}

20
libavcodec/pnmdec.c
View File

@ -36,29 +36,29 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
AVFrame * const p = &s->picture;
int i, j, n, linesize, h, upgrade = 0;
unsigned char *ptr;
int components, sample_len;
int components, sample_len, ret;
s->bytestream_start =
s->bytestream = buf;
s->bytestream_end = buf + buf_size;
if (ff_pnm_decode_header(avctx, s) < 0)
return -1;
if ((ret = ff_pnm_decode_header(avctx, s)) < 0)
return ret;
if (p->data[0])
avctx->release_buffer(avctx, p);
p->reference = 0;
if (ff_get_buffer(avctx, p) < 0) {
if ((ret = ff_get_buffer(avctx, p)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
return ret;
}
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
switch (avctx->pix_fmt) {
default:
return -1;
return AVERROR(EINVAL);
case AV_PIX_FMT_RGB48BE:
n = avctx->width * 6;
components=3;
@ -93,7 +93,7 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
ptr = p->data[0];
linesize = p->linesize[0];
if (s->bytestream + n * avctx->height > s->bytestream_end)
return -1;
return AVERROR_INVALIDDATA;
if(s->type < 4){
for (i=0; i<avctx->height; i++) {
PutBitContext pb;
@ -104,7 +104,7 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
while(s->bytestream < s->bytestream_end && (*s->bytestream < '0' || *s->bytestream > '9' ))
s->bytestream++;
if(s->bytestream >= s->bytestream_end)
return -1;
return AVERROR_INVALIDDATA;
do{
v= 10*v + c;
c= (*s->bytestream++) - '0';
@ -142,7 +142,7 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
ptr = p->data[0];
linesize = p->linesize[0];
if (s->bytestream + n * avctx->height * 3 / 2 > s->bytestream_end)
return -1;
return AVERROR_INVALIDDATA;
for (i = 0; i < avctx->height; i++) {
memcpy(ptr, s->bytestream, n);
s->bytestream += n;
@ -166,7 +166,7 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
ptr = p->data[0];
linesize = p->linesize[0];
if (s->bytestream + avctx->width * avctx->height * 4 > s->bytestream_end)
return -1;
return AVERROR_INVALIDDATA;
for (i = 0; i < avctx->height; i++) {
int j, r, g, b, a;