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4xm: return meaningful error codes

This commit is contained in:
Anton Khirnov 2012-11-13 21:49:42 +01:00
parent 95d01c3f1c
commit 10c26e928a
1 changed files with 20 additions and 19 deletions
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39
libavcodec/4xm.c
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@ -415,7 +415,7 @@ static int decode_p_frame(FourXContext *f, const uint8_t *buf, int length)
av_log(f->avctx, AV_LOG_ERROR, "lengths %d %d %d %d\n",
bitstream_size, bytestream_size, wordstream_size,
bitstream_size + bytestream_size + wordstream_size - length);
return -1;
return AVERROR_INVALIDDATA;
}
av_fast_malloc(&f->bitstream_buffer, &f->bitstream_buffer_size,
@ -542,13 +542,14 @@ static inline void idct_put(FourXContext *f, int x, int y)
static int decode_i_mb(FourXContext *f)
{
int ret;
int i;
f->dsp.clear_blocks(f->block[0]);
for (i = 0; i < 6; i++)
if (decode_i_block(f, f->block[i]) < 0)
return -1;
if ((ret = decode_i_block(f, f->block[i])) < 0)
return ret;
return 0;
}
@ -694,7 +695,7 @@ static int decode_i2_frame(FourXContext *f, const uint8_t *buf, int length)
static int decode_i_frame(FourXContext *f, const uint8_t *buf, int length)
{
int x, y;
int x, y, ret;
const int width = f->avctx->width;
const int height = f->avctx->height;
const unsigned int bitstream_size = AV_RL32(buf);
@ -716,7 +717,7 @@ static int decode_i_frame(FourXContext *f, const uint8_t *buf, int length)
|| prestream_size > (1 << 26)) {
av_log(f->avctx, AV_LOG_ERROR, "size mismatch %d %d %d\n",
prestream_size, bitstream_size, length);
return -1;
return AVERROR_INVALIDDATA;
}
prestream = read_huffman_tables(f, prestream);
@ -739,8 +740,8 @@ static int decode_i_frame(FourXContext *f, const uint8_t *buf, int length)
for (y = 0; y < height; y += 16) {
for (x = 0; x < width; x += 16) {
if (decode_i_mb(f) < 0)
return -1;
if ((ret = decode_i_mb(f)) < 0)
return ret;
idct_put(f, x, y);
}
@ -760,7 +761,7 @@ static int decode_frame(AVCodecContext *avctx, void *data,
FourXContext *const f = avctx->priv_data;
AVFrame *picture = data;
AVFrame *p, temp;
int i, frame_4cc, frame_size;
int i, frame_4cc, frame_size, ret;
frame_4cc = AV_RL32(buf);
if (buf_size != AV_RL32(buf + 4) + 8 || buf_size < 20)
@ -797,7 +798,7 @@ static int decode_frame(AVCodecContext *avctx, void *data,
// explicit check needed as memcpy below might not catch a NULL
if (!cfrm->data) {
av_log(f->avctx, AV_LOG_ERROR, "realloc failure");
return -1;
return AVERROR(ENOMEM);
}
memcpy(cfrm->data + cfrm->size, buf + 20, data_size);
@ -834,32 +835,32 @@ static int decode_frame(AVCodecContext *avctx, void *data,
avctx->release_buffer(avctx, p);
p->reference = 1;
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;
}
if (frame_4cc == AV_RL32("ifr2")) {
p->pict_type = AV_PICTURE_TYPE_I;
if (decode_i2_frame(f, buf - 4, frame_size + 4) < 0)
return -1;
if ((ret = decode_i2_frame(f, buf - 4, frame_size + 4)) < 0)
return ret;
} else if (frame_4cc == AV_RL32("ifrm")) {
p->pict_type = AV_PICTURE_TYPE_I;
if (decode_i_frame(f, buf, frame_size) < 0)
return -1;
if ((ret = decode_i_frame(f, buf, frame_size)) < 0)
return ret;
} else if (frame_4cc == AV_RL32("pfrm") || frame_4cc == AV_RL32("pfr2")) {
if (!f->last_picture.data[0]) {
f->last_picture.reference = 1;
if (ff_get_buffer(avctx, &f->last_picture) < 0) {
if ((ret = ff_get_buffer(avctx, &f->last_picture)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
return ret;
}
memset(f->last_picture.data[0], 0, avctx->height * FFABS(f->last_picture.linesize[0]));
}
p->pict_type = AV_PICTURE_TYPE_P;
if (decode_p_frame(f, buf, frame_size) < 0)
return -1;
if ((ret = decode_p_frame(f, buf, frame_size)) < 0)
return ret;
} else if (frame_4cc == AV_RL32("snd_")) {
av_log(avctx, AV_LOG_ERROR, "ignoring snd_ chunk length:%d\n",
buf_size);