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WebPGetFeatures() out of if condition for clarity.

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Also, some comment tweaks in decode.h

Change-Id: I9d4e80f2ffdc51d35bd3215486e26448bddd143b
This commit is contained in:
Urvang Joshi 2013-03-05 18:05:12 -08:00
parent 6933d91057
commit 988b8f56b3
2 changed files with 15 additions and 12 deletions
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23
src/demux/demux.c
View File

@ -234,19 +234,22 @@ static ParseStatus StoreFrame(int frame_num, uint32_t min_size,
case MKFOURCC('V', 'P', '8', ' '):
case MKFOURCC('V', 'P', '8', 'L'):
if (image_chunks == 0) {
// Extract the bitstream features, tolerating failures when the data
// is incomplete.
WebPBitstreamFeatures features;
ChunkData* const image = frame->img_components_;
++image_chunks;
image->offset_ = chunk_start_offset;
image->size_ = chunk_size;
// Extract the width and height from the bitstream, tolerating
// failures when the data is incomplete.
if ((WebPGetFeatures(mem->buf_ + image->offset_, image->size_,
&features) != VP8_STATUS_OK) &&
status != PARSE_NEED_MORE_DATA) {
const VP8StatusCode vp8_status =
WebPGetFeatures(mem->buf_ + chunk_start_offset, chunk_size,
&features);
if (status == PARSE_NEED_MORE_DATA &&
vp8_status == VP8_STATUS_NOT_ENOUGH_DATA) {
return PARSE_NEED_MORE_DATA;
} else if (vp8_status != VP8_STATUS_OK) {
// We have enough data, and yet WebPGetFeatures() failed.
return PARSE_ERROR;
}
++image_chunks;
frame->img_components_[0].offset_ = chunk_start_offset;
frame->img_components_[0].size_ = chunk_size;
frame->width_ = features.width;
frame->height_ = features.height;
if (has_vp8l_alpha != NULL) *has_vp8l_alpha = features.has_alpha;

4
src/webp/decode.h
View File

@ -412,8 +412,8 @@ WEBP_EXTERN(VP8StatusCode) WebPGetFeaturesInternal(
// Retrieve features from the bitstream. The *features structure is filled
// with information gathered from the bitstream.
// Returns VP8_STATUS_OK when the features are successfully retrieved. Returns
// VP8_STATUS_NOT_ENOUGH_DATA when more data is needed to retrieved the
// features. Returns error in other cases.
// VP8_STATUS_NOT_ENOUGH_DATA when more data is needed to retrieve the
// features from headers. Returns error in other cases.
static WEBP_INLINE VP8StatusCode WebPGetFeatures(
const uint8_t* data, size_t data_size,
WebPBitstreamFeatures* features) {