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Merge commit '9dbbda235d93d628777b986e502213f1ed390973'

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* commit '9dbbda235d93d628777b986e502213f1ed390973':
  vb: return meaningful error codes.
  ptx: return meaningful error codes.
  tiff: return meaningful error codes.
  vqavideo: return meaningful error codes.
  mss2: return meaningful error codes.
  v210dec: return meaningful error codes
  indeo2: cosmetics, reformat

Conflicts:
	libavcodec/indeo2.c
	libavcodec/tiff.c
	libavcodec/v210dec.c
	libavcodec/vb.c
	libavcodec/vqavideo.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-01-07 01:24:32 +01:00
commit 501db2f32b
7 changed files with 93 additions and 88 deletions
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64
libavcodec/indeo2.c
View File

@ -47,8 +47,8 @@ static inline int ir2_get_code(GetBitContext *gb)
return get_vlc2(gb, ir2_vlc.table, CODE_VLC_BITS, 1) + 1;
}
static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst, int stride,
const uint8_t *table)
static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst,
int stride, const uint8_t *table)
{
int i;
int j;
@ -56,15 +56,15 @@ static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst
int c;
int t;
if(width&1)
if (width & 1)
return AVERROR_INVALIDDATA;
/* first line contain absolute values, other lines contain deltas */
while (out < width){
while (out < width) {
c = ir2_get_code(&ctx->gb);
if(c >= 0x80) { /* we have a run */
if (c >= 0x80) { /* we have a run */
c -= 0x7F;
if(out + c*2 > width)
if (out + c*2 > width)
return AVERROR_INVALIDDATA;
for (i = 0; i < c * 2; i++)
dst[out++] = 0x80;
@ -75,25 +75,25 @@ static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst
}
dst += stride;
for (j = 1; j < height; j++){
for (j = 1; j < height; j++) {
out = 0;
while (out < width){
while (out < width) {
c = ir2_get_code(&ctx->gb);
if(c >= 0x80) { /* we have a skip */
if (c >= 0x80) { /* we have a skip */
c -= 0x7F;
if(out + c*2 > width)
if (out + c*2 > width)
return AVERROR_INVALIDDATA;
for (i = 0; i < c * 2; i++) {
dst[out] = dst[out - stride];
out++;
}
} else { /* add two deltas from table */
t = dst[out - stride] + (table[c * 2] - 128);
t= av_clip_uint8(t);
t = dst[out - stride] + (table[c * 2] - 128);
t = av_clip_uint8(t);
dst[out] = t;
out++;
t = dst[out - stride] + (table[(c * 2) + 1] - 128);
t= av_clip_uint8(t);
t = dst[out - stride] + (table[(c * 2) + 1] - 128);
t = av_clip_uint8(t);
dst[out] = t;
out++;
}
@ -103,31 +103,31 @@ static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst
return 0;
}
static int ir2_decode_plane_inter(Ir2Context *ctx, int width, int height, uint8_t *dst, int stride,
const uint8_t *table)
static int ir2_decode_plane_inter(Ir2Context *ctx, int width, int height, uint8_t *dst,
int stride, const uint8_t *table)
{
int j;
int out = 0;
int c;
int t;
if(width&1)
if (width & 1)
return AVERROR_INVALIDDATA;
for (j = 0; j < height; j++){
for (j = 0; j < height; j++) {
out = 0;
while (out < width){
while (out < width) {
c = ir2_get_code(&ctx->gb);
if(c >= 0x80) { /* we have a skip */
c -= 0x7F;
if (c >= 0x80) { /* we have a skip */
c -= 0x7F;
out += c * 2;
} else { /* add two deltas from table */
t = dst[out] + (((table[c * 2] - 128)*3) >> 2);
t= av_clip_uint8(t);
t = dst[out] + (((table[c * 2] - 128)*3) >> 2);
t = av_clip_uint8(t);
dst[out] = t;
out++;
t = dst[out] + (((table[(c * 2) + 1] - 128)*3) >> 2);
t= av_clip_uint8(t);
t = dst[out] + (((table[(c * 2) + 1] - 128)*3) >> 2);
t = av_clip_uint8(t);
dst[out] = t;
out++;
}
@ -141,11 +141,11 @@ static int ir2_decode_frame(AVCodecContext *avctx,
void *data, int *got_frame,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
Ir2Context * const s = avctx->priv_data;
AVFrame *picture = data;
AVFrame * const p = &s->picture;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
AVFrame *picture = data;
AVFrame * const p = &s->picture;
int start, ret;
p->reference = 3;
@ -209,7 +209,8 @@ static int ir2_decode_frame(AVCodecContext *avctx,
return buf_size;
}
static av_cold int ir2_decode_init(AVCodecContext *avctx){
static av_cold int ir2_decode_init(AVCodecContext *avctx)
{
Ir2Context * const ic = avctx->priv_data;
static VLC_TYPE vlc_tables[1 << CODE_VLC_BITS][2];
@ -233,7 +234,8 @@ static av_cold int ir2_decode_init(AVCodecContext *avctx){
return 0;
}
static av_cold int ir2_decode_end(AVCodecContext *avctx){
static av_cold int ir2_decode_end(AVCodecContext *avctx)
{
Ir2Context * const ic = avctx->priv_data;
AVFrame *pic = &ic->picture;

24
libavcodec/mss2.c
View File

@ -163,7 +163,7 @@ static int decode_pal_v2(MSS12Context *ctx, const uint8_t *buf, int buf_size)
ncol = *buf++;
if (ncol > ctx->free_colours || buf_size < 2 + ncol * 3)
return -1;
return AVERROR_INVALIDDATA;
for (i = 0; i < ncol; i++)
*pal++ = AV_RB24(buf + 3 * i);
@ -189,7 +189,7 @@ static int decode_555(GetByteContext *gB, uint16_t *dst, int stride,
READ_PAIR(y, endy)
if (endx >= w || endy >= h || x > endx || y > endy)
return -1;
return AVERROR_INVALIDDATA;
dst += x + stride * y;
w = endx - x + 1;
h = endy - y + 1;
@ -373,13 +373,14 @@ static int decode_wmv9(AVCodecContext *avctx, const uint8_t *buf, int buf_size,
VC1Context *v = avctx->priv_data;
MpegEncContext *s = &v->s;
AVFrame *f;
int ret;
ff_mpeg_flush(avctx);
if (s->current_picture_ptr == NULL || s->current_picture_ptr->f.data[0]) {
int i = ff_find_unused_picture(s, 0);
if (i < 0)
return -1;
return i;
s->current_picture_ptr = &s->picture[i];
}
@ -399,10 +400,10 @@ static int decode_wmv9(AVCodecContext *avctx, const uint8_t *buf, int buf_size,
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
if (ff_MPV_frame_start(s, avctx) < 0) {
if ((ret = ff_MPV_frame_start(s, avctx)) < 0) {
av_log(v->s.avctx, AV_LOG_ERROR, "ff_MPV_frame_start error\n");
avctx->pix_fmt = AV_PIX_FMT_RGB24;
return -1;
return ret;
}
ff_er_frame_start(s);
@ -617,7 +618,7 @@ static int mss2_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
ctx->last_pic.linesize[0] * (avctx->height - 1);
} else {
av_log(avctx, AV_LOG_ERROR, "Missing keyframe\n");
return -1;
return AVERROR_INVALIDDATA;
}
} else {
if (ctx->last_pic.data[0])
@ -753,6 +754,7 @@ static int mss2_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
static av_cold int wmv9_init(AVCodecContext *avctx)
{
VC1Context *v = avctx->priv_data;
int ret;
v->s.avctx = avctx;
avctx->flags |= CODEC_FLAG_EMU_EDGE;
@ -761,8 +763,8 @@ static av_cold int wmv9_init(AVCodecContext *avctx)
if (avctx->idct_algo == FF_IDCT_AUTO)
avctx->idct_algo = FF_IDCT_WMV2;
if (ff_vc1_init_common(v) < 0)
return -1;
if ((ret = ff_vc1_init_common(v)) < 0)
return ret;
ff_vc1dsp_init(&v->vc1dsp);
v->profile = PROFILE_MAIN;
@ -802,9 +804,9 @@ static av_cold int wmv9_init(AVCodecContext *avctx)
ff_vc1_init_transposed_scantables(v);
if (ff_msmpeg4_decode_init(avctx) < 0 ||
ff_vc1_decode_init_alloc_tables(v) < 0)
return -1;
if ((ret = ff_msmpeg4_decode_init(avctx)) < 0 ||
(ret = ff_vc1_decode_init_alloc_tables(v)) < 0)
return ret;
/* error concealment */
v->s.me.qpel_put = v->s.dsp.put_qpel_pixels_tab;

9
libavcodec/ptx.c
View File

@ -46,6 +46,7 @@ static int ptx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
AVFrame *picture = data;
AVFrame * const p = &s->picture;
unsigned int offset, w, h, y, stride, bytes_per_pixel;
int ret;
uint8_t *ptr;
if (buf_end - buf < 14)
@ -72,13 +73,13 @@ static int ptx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
if (p->data[0])
avctx->release_buffer(avctx, p);
if (av_image_check_size(w, h, 0, avctx))
return -1;
if ((ret = av_image_check_size(w, h, 0, avctx)) < 0)
return ret;
if (w != avctx->width || h != avctx->height)
avcodec_set_dimensions(avctx, w, h);
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;

54
libavcodec/tiff.c
View File

@ -399,7 +399,7 @@ static void av_always_inline horizontal_fill(unsigned int bpp, uint8_t* dst,
static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
const uint8_t *src, int size, int lines)
{
int c, line, pixels, code;
int c, line, pixels, code, ret;
const uint8_t *ssrc = src;
int width = ((s->width * s->bpp) + 7) >> 3;
@ -434,7 +434,7 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
(unsigned long)width * lines, ret);
av_free(src2);
av_free(zbuf);
return -1;
return AVERROR_UNKNOWN;
}
src = zbuf;
for (line = 0; line < lines; line++) {
@ -465,9 +465,9 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
if (size > 1 && !src[0] && (src[1]&1)) {
av_log(s->avctx, AV_LOG_ERROR, "Old style LZW is unsupported\n");
}
if (ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0) {
if ((ret = ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF)) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
return -1;
return ret;
}
}
if (s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3
@ -485,7 +485,7 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
av_log(s->avctx, AV_LOG_ERROR,
"Uncompressed fax mode is not supported (yet)\n");
av_free(src2);
return -1;
return AVERROR_INVALIDDATA;
}
if (!s->fill_order) {
memcpy(src2, src, size);
@ -513,7 +513,7 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
for (line = 0; line < lines; line++) {
if (src - ssrc > size) {
av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
return -1;
return AVERROR_INVALIDDATA;
}
switch (s->compr) {
case TIFF_RAW:
@ -541,7 +541,7 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
if (pixels + code > width) {
av_log(s->avctx, AV_LOG_ERROR,
"Copy went out of bounds\n");
return -1;
return AVERROR_INVALIDDATA;
}
if (ssrc + size - src < code) {
av_log(s->avctx, AV_LOG_ERROR, "Read went out of bounds\n");
@ -556,7 +556,7 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
if (pixels + code > width) {
av_log(s->avctx, AV_LOG_ERROR,
"Run went out of bounds\n");
return -1;
return AVERROR_INVALIDDATA;
}
c = *src++;
horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),
@ -570,7 +570,7 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
if (pixels < width) {
av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n",
pixels, width);
return -1;
return AVERROR_INVALIDDATA;
}
if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);
@ -705,7 +705,7 @@ static int tiff_decode_tag(TiffContext *s)
av_log(s->avctx, AV_LOG_ERROR,
"This format is not supported (bpp=%d, %d components)\n",
s->bpp, count);
return -1;
return AVERROR_INVALIDDATA;
}
if (count == 1)
s->bpp = value;
@ -719,7 +719,7 @@ static int tiff_decode_tag(TiffContext *s)
case TIFF_LONG:
s->bpp = 0;
if (bytestream2_get_bytes_left(&s->gb) < type_sizes[type] * count)
return -1;
return AVERROR_INVALIDDATA;
for (i = 0; i < count; i++)
s->bpp += tget(&s->gb, type, s->le);
break;
@ -757,17 +757,17 @@ static int tiff_decode_tag(TiffContext *s)
break;
#else
av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
return -1;
return AVERROR(ENOSYS);
#endif
case TIFF_JPEG:
case TIFF_NEWJPEG:
av_log(s->avctx, AV_LOG_ERROR,
"JPEG compression is not supported\n");
return -1;
return AVERROR_PATCHWELCOME;
default:
av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n",
s->compr);
return -1;
return AVERROR_INVALIDDATA;
}
break;
case TIFF_ROWSPERSTRIP:
@ -776,7 +776,7 @@ static int tiff_decode_tag(TiffContext *s)
if (value < 1) {
av_log(s->avctx, AV_LOG_ERROR,
"Incorrect value of rows per strip\n");
return -1;
return AVERROR_INVALIDDATA;
}
s->rps = value;
break;
@ -793,7 +793,7 @@ static int tiff_decode_tag(TiffContext *s)
if (s->strippos > bytestream2_size(&s->gb)) {
av_log(s->avctx, AV_LOG_ERROR,
"Tag referencing position outside the image\n");
return -1;
return AVERROR_INVALIDDATA;
}
break;
case TIFF_STRIP_SIZE:
@ -809,7 +809,7 @@ static int tiff_decode_tag(TiffContext *s)
if (s->stripsizesoff > bytestream2_size(&s->gb)) {
av_log(s->avctx, AV_LOG_ERROR,
"Tag referencing position outside the image\n");
return -1;
return AVERROR_INVALIDDATA;
}
break;
case TIFF_TILE_BYTE_COUNTS:
@ -836,7 +836,7 @@ static int tiff_decode_tag(TiffContext *s)
default:
av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n",
value);
return -1;
return AVERROR_INVALIDDATA;
}
break;
case TIFF_FILL_ORDER:
@ -851,7 +851,7 @@ static int tiff_decode_tag(TiffContext *s)
pal = (uint32_t *) s->palette;
off = type_sizes[type];
if (count / 3 > 256 || bytestream2_get_bytes_left(&s->gb) < count / 3 * off * 3)
return -1;
return AVERROR_INVALIDDATA;
off = (type_sizes[type] - 1) << 3;
for (k = 2; k >= 0; k--) {
for (i = 0; i < count / 3; i++) {
@ -866,7 +866,7 @@ static int tiff_decode_tag(TiffContext *s)
case TIFF_PLANAR:
if (value == 2) {
av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
return -1;
return AVERROR_PATCHWELCOME;
}
break;
case TIFF_T4OPTIONS:
@ -959,7 +959,7 @@ static int tiff_decode_tag(TiffContext *s)
bytestream2_seek(&s->gb, pos + s->geotags[i].offset, SEEK_SET);
if (bytestream2_get_bytes_left(&s->gb) < s->geotags[i].count)
return -1;
return AVERROR_INVALIDDATA;
ap = av_malloc(s->geotags[i].count);
if (!ap) {
av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
@ -1040,7 +1040,7 @@ static int decode_frame(AVCodecContext *avctx,
le = 0;
else {
av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
return -1;
return AVERROR_INVALIDDATA;
}
s->le = le;
// TIFF_BPP is not a required tag and defaults to 1
@ -1058,7 +1058,7 @@ static int decode_frame(AVCodecContext *avctx,
if (tget_short(&s->gb, le) != 42) {
av_log(avctx, AV_LOG_ERROR,
"The answer to life, universe and everything is not correct!\n");
return -1;
return AVERROR_INVALIDDATA;
}
// Reset these offsets so we can tell if they were set this frame
s->stripsizesoff = s->strippos = 0;
@ -1073,8 +1073,8 @@ static int decode_frame(AVCodecContext *avctx,
if (bytestream2_get_bytes_left(&s->gb) < entries * 12)
return AVERROR_INVALIDDATA;
for (i = 0; i < entries; i++) {
if (tiff_decode_tag(s) < 0)
return -1;
if ((ret = tiff_decode_tag(s)) < 0)
return ret;
}
for (i = 0; i<s->geotag_count; i++) {
@ -1096,7 +1096,7 @@ static int decode_frame(AVCodecContext *avctx,
if (!s->strippos && !s->stripoff) {
av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
return -1;
return AVERROR_INVALIDDATA;
}
/* now we have the data and may start decoding */
if ((ret = init_image(s)) < 0)
@ -1138,7 +1138,7 @@ static int decode_frame(AVCodecContext *avctx,
if (soff > avpkt->size || ssize > avpkt->size - soff) {
av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");
return -1;
return AVERROR_INVALIDDATA;
}
if (tiff_unpack_strip(s, dst, stride, avpkt->data + soff, ssize,
FFMIN(s->rps, s->height - i)) < 0)

10
libavcodec/v210dec.c
View File

@ -55,7 +55,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
if (avctx->width & 1) {
av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
return -1;
return AVERROR_INVALIDDATA;
}
avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
avctx->bits_per_raw_sample = 10;
@ -77,7 +77,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
{
V210DecContext *s = avctx->priv_data;
int h, w, stride, aligned_input;
int h, w, ret, stride, aligned_input;
AVFrame *pic = avctx->coded_frame;
const uint8_t *psrc = avpkt->data;
uint16_t *y, *u, *v;
@ -97,7 +97,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
s->stride_warning_shown = 1;
} else {
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
return -1;
return AVERROR_INVALIDDATA;
}
}
@ -112,8 +112,8 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
avctx->release_buffer(avctx, pic);
pic->reference = 0;
if (ff_get_buffer(avctx, pic) < 0)
return -1;
if ((ret = ff_get_buffer(avctx, pic)) < 0)
return ret;
y = (uint16_t*)pic->data[0];
u = (uint16_t*)pic->data[1];

10
libavcodec/vb.c
View File

@ -123,7 +123,7 @@ static int vb_decode_framedata(VBDecContext *c, int offset)
if(!t){ //raw block
if (bytestream2_get_bytes_left(&g) < 16) {
av_log(c->avctx, AV_LOG_ERROR, "Insufficient data\n");
return -1;
return AVERROR_INVALIDDATA;
}
for(y = 0; y < 4; y++)
bytestream2_get_buffer(&g, cur + y * width, 4);
@ -168,7 +168,7 @@ static int vb_decode_framedata(VBDecContext *c, int offset)
break;
case 3:
av_log(c->avctx, AV_LOG_ERROR, "Invalid opcode seen @%d\n",blk);
return -1;
return AVERROR_INVALIDDATA;
}
break;
}
@ -190,7 +190,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
{
VBDecContext * const c = avctx->priv_data;
uint8_t *outptr, *srcptr;
int i, j;
int i, j, ret;
int flags;
uint32_t size;
int offset = 0;
@ -200,9 +200,9 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
if(c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
c->pic.reference = 3;
if(ff_get_buffer(avctx, &c->pic) < 0){
if ((ret = ff_get_buffer(avctx, &c->pic)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
return ret;
}
flags = bytestream2_get_le16(&c->stream);

10
libavcodec/vqavideo.c
View File

@ -122,7 +122,7 @@ typedef struct VqaContext {
static av_cold int vqa_decode_init(AVCodecContext *avctx)
{
VqaContext *s = avctx->priv_data;
int i, j, codebook_index;
int i, j, codebook_index, ret;
s->avctx = avctx;
avctx->pix_fmt = AV_PIX_FMT_PAL8;
@ -130,7 +130,7 @@ static av_cold int vqa_decode_init(AVCodecContext *avctx)
/* make sure the extradata made it */
if (s->avctx->extradata_size != VQA_HEADER_SIZE) {
av_log(s->avctx, AV_LOG_ERROR, "expected extradata size of %d\n", VQA_HEADER_SIZE);
return AVERROR_INVALIDDATA;
return AVERROR(EINVAL);
}
/* load up the VQA parameters from the header */
@ -141,9 +141,9 @@ static av_cold int vqa_decode_init(AVCodecContext *avctx)
}
s->width = AV_RL16(&s->avctx->extradata[6]);
s->height = AV_RL16(&s->avctx->extradata[8]);
if(av_image_check_size(s->width, s->height, 0, avctx)){
if ((ret = av_image_check_size(s->width, s->height, 0, avctx)) < 0) {
s->width= s->height= 0;
return AVERROR_INVALIDDATA;
return ret;
}
s->vector_width = s->avctx->extradata[10];
s->vector_height = s->avctx->extradata[11];
@ -592,7 +592,7 @@ static int vqa_decode_frame(AVCodecContext *avctx,
if (s->frame.data[0])
avctx->release_buffer(avctx, &s->frame);
if ((res = ff_get_buffer(avctx, &s->frame))) {
if ((res = ff_get_buffer(avctx, &s->frame)) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return res;
}