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Code Issues Releases Activity

dxtory: Factorize the buffer loading

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And the checks nearby it.
This commit is contained in:
Luca Barbato 2015-09-03 16:13:04 +02:00
parent 6a6bc43f5f
commit a7e6fbd90e
1 changed files with 37 additions and 65 deletions
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102
libavcodec/dxtory.c
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@ -220,6 +220,28 @@ static int check_slice_size(AVCodecContext *avctx,
return 0;
}
static int load_buffer(AVCodecContext *avctx,
const uint8_t *src, int src_size,
GetByteContext *gb,
int *nslices, int *off)
{
bytestream2_init(gb, src, src_size);
*nslices = bytestream2_get_le16(gb);
*off = FFALIGN(*nslices * 4 + 2, 16);
if (src_size < *off) {
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
return AVERROR_INVALIDDATA;
}
if (!*nslices || avctx->height % *nslices) {
avpriv_request_sample(avctx, "%d slices for %dx%d", *nslices,
avctx->width, avctx->height);
return AVERROR_PATCHWELCOME;
}
return 0;
}
static inline uint8_t decode_sym_565(GetBitContext *gb, uint8_t lru[8],
int bits)
{
@ -275,19 +297,9 @@ static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic,
uint8_t *dst;
int ret;
bytestream2_init(&gb, src, src_size);
nslices = bytestream2_get_le16(&gb);
off = FFALIGN(nslices * 4 + 2, 16);
if (src_size < off) {
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
return AVERROR_INVALIDDATA;
}
if (!nslices || avctx->height % nslices) {
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
avctx->width, avctx->height);
return AVERROR_PATCHWELCOME;
}
ret = load_buffer(avctx, src, src_size, &gb, &nslices, &off);
if (ret < 0)
return ret;
slice_height = avctx->height / nslices;
avctx->pix_fmt = AV_PIX_FMT_RGB24;
@ -345,19 +357,9 @@ static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic,
uint8_t *dst;
int ret;
bytestream2_init(&gb, src, src_size);
nslices = bytestream2_get_le16(&gb);
off = FFALIGN(nslices * 4 + 2, 16);
if (src_size < off) {
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
return AVERROR_INVALIDDATA;
}
if (!nslices || avctx->height % nslices) {
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
avctx->width, avctx->height);
return AVERROR_PATCHWELCOME;
}
ret = load_buffer(avctx, src, src_size, &gb, &nslices, &off);
if (ret < 0)
return ret;
slice_height = avctx->height / nslices;
avctx->pix_fmt = AV_PIX_FMT_BGR24;
@ -421,19 +423,9 @@ static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic,
uint8_t *Y, *U, *V;
int ret;
bytestream2_init(&gb, src, src_size);
nslices = bytestream2_get_le16(&gb);
off = FFALIGN(nslices * 4 + 2, 16);
if (src_size < off) {
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
return AVERROR_INVALIDDATA;
}
if (!nslices || avctx->height % nslices) {
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
avctx->width, avctx->height);
return AVERROR_PATCHWELCOME;
}
ret = load_buffer(avctx, src, src_size, &gb, &nslices, &off);
if (ret < 0)
return ret;
ref_slice_height = avctx->height / nslices;
if ((avctx->width & 3) || (avctx->height & 3)) {
@ -514,19 +506,9 @@ static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic,
uint8_t *Y, *U, *V;
int ret;
bytestream2_init(&gb, src, src_size);
nslices = bytestream2_get_le16(&gb);
off = FFALIGN(nslices * 4 + 2, 16);
if (src_size < off) {
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
return AVERROR_INVALIDDATA;
}
if (!nslices || avctx->height % nslices) {
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
avctx->width, avctx->height);
return AVERROR_PATCHWELCOME;
}
ret = load_buffer(avctx, src, src_size, &gb, &nslices, &off);
if (ret < 0)
return ret;
ref_slice_height = avctx->height / nslices;
if ((avctx->width & 1) || (avctx->height & 1)) {
@ -603,19 +585,9 @@ static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic,
uint8_t *Y, *U, *V;
int ret;
bytestream2_init(&gb, src, src_size);
nslices = bytestream2_get_le16(&gb);
off = FFALIGN(nslices * 4 + 2, 16);
if (src_size < off) {
av_log(avctx, AV_LOG_ERROR, "no slice data\n");
return AVERROR_INVALIDDATA;
}
if (!nslices || avctx->height % nslices) {
avpriv_request_sample(avctx, "%d slices for %dx%d", nslices,
avctx->width, avctx->height);
return AVERROR_PATCHWELCOME;
}
ret = load_buffer(avctx, src, src_size, &gb, &nslices, &off);
if (ret < 0)
return ret;
slice_height = avctx->height / nslices;