Commit a2aeaff4 authored by Michael Niedermayer's avatar Michael Niedermayer

Merge commit 'aa15afb7'

* commit 'aa15afb7':
  4xm: simplify code with FFSWAP
  4xm: return meaningful error codes

Conflicts:
	libavcodec/4xm.c
Merged-by: 's avatarMichael Niedermayer <michaelni@gmx.at>
parents 58edabb1 aa15afb7
......@@ -435,7 +435,7 @@ static int decode_p_frame(FourXContext *f, const uint8_t *buf, int length)
extra > length - bytestream_size - bitstream_size - wordstream_size) {
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,
......@@ -567,13 +567,14 @@ 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;
}
......@@ -725,7 +726,7 @@ 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);
......@@ -745,7 +746,7 @@ 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, buf + length - prestream);
......@@ -770,8 +771,8 @@ 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);
}
......@@ -790,8 +791,8 @@ static int decode_frame(AVCodecContext *avctx, void *data,
int buf_size = avpkt->size;
FourXContext *const f = avctx->priv_data;
AVFrame *picture = data;
AVFrame *p, temp;
int i, frame_4cc, frame_size;
AVFrame *p;
int i, frame_4cc, frame_size, ret;
if (buf_size < 12)
return AVERROR_INVALIDDATA;
......@@ -843,7 +844,7 @@ 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\n");
return -1;
return AVERROR(ENOMEM);
}
memcpy(cfrm->data + cfrm->size, buf + 20, data_size);
......@@ -866,9 +867,7 @@ static int decode_frame(AVCodecContext *avctx, void *data,
frame_size = buf_size - 12;
}
temp = f->current_picture;
f->current_picture = f->last_picture;
f->last_picture = temp;
FFSWAP(AVFrame, f->current_picture, f->last_picture);
p = &f->current_picture;
avctx->coded_frame = p;
......@@ -877,38 +876,38 @@ static int decode_frame(AVCodecContext *avctx, void *data,
avctx->flags |= CODEC_FLAG_EMU_EDGE;
p->reference= 3;
if (avctx->reget_buffer(avctx, p) < 0) {
if ((ret = avctx->reget_buffer(avctx, p)) < 0) {
av_log(avctx, AV_LOG_ERROR, "reget_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) {
if ((ret = decode_i2_frame(f, buf - 4, frame_size + 4)) < 0) {
av_log(f->avctx, AV_LOG_ERROR, "decode i2 frame failed\n");
return -1;
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) {
if ((ret = decode_i_frame(f, buf, frame_size)) < 0) {
av_log(f->avctx, AV_LOG_ERROR, "decode i frame failed\n");
return -1;
return ret;
}
} else if (frame_4cc == AV_RL32("pfrm") || frame_4cc == AV_RL32("pfr2")) {
if (!f->last_picture.data[0]) {
f->last_picture.reference = 3;
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;
}
for (i=0; i<avctx->height; i++)
memset(f->last_picture.data[0] + i*f->last_picture.linesize[0], 0, 2*avctx->width);
}
p->pict_type = AV_PICTURE_TYPE_P;
if (decode_p_frame(f, buf, frame_size) < 0) {
if ((ret = decode_p_frame(f, buf, frame_size)) < 0) {
av_log(f->avctx, AV_LOG_ERROR, "decode p frame failed\n");
return -1;
return ret;
}
} else if (frame_4cc == AV_RL32("snd_")) {
av_log(avctx, AV_LOG_ERROR, "ignoring snd_ chunk length:%d\n",
......
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