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properly report back encoding error code in WebPFrameCacheAddFrame()

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User-hook can fail but error was not propagated back.

Change-Id: Ic79f9543bf767634a127eccfef90af855ff15c34
Also: some ad-hoc clean-up and API dusting. More to come later...
This commit is contained in:
skal 2014-06-11 23:26:47 +02:00
parent 90090d99b5
commit f05fe006c2
2 changed files with 48 additions and 24 deletions
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69
examples/gif2webp_util.c
View File

@ -415,11 +415,15 @@ static int GetColorCount(const WebPPicture* const pic) {
#undef HASH_SIZE
#undef HASH_RIGHT_SHIFT
static int SetFrame(const WebPConfig* const config, int allow_mixed,
int is_key_frame, const WebPPicture* const prev_canvas,
WebPPicture* const frame, const WebPFrameRect* const rect,
const WebPMuxFrameInfo* const info,
WebPPicture* const sub_frame, EncodedFrame* encoded_frame) {
static WebPEncodingError SetFrame(const WebPConfig* const config,
int allow_mixed, int is_key_frame,
const WebPPicture* const prev_canvas,
WebPPicture* const frame,
const WebPFrameRect* const rect,
const WebPMuxFrameInfo* const info,
WebPPicture* const sub_frame,
EncodedFrame* encoded_frame) {
WebPEncodingError error_code = VP8_ENC_OK;
int try_lossless;
int try_lossy;
int try_both;
@ -446,6 +450,7 @@ static int SetFrame(const WebPConfig* const config, int allow_mixed,
WebPConfig config_ll = *config;
config_ll.lossless = 1;
if (!EncodeFrame(&config_ll, sub_frame, &mem1)) {
error_code = sub_frame->error_code;
goto Err;
}
}
@ -461,6 +466,7 @@ static int SetFrame(const WebPConfig* const config, int allow_mixed,
FlattenSimilarBlocks(prev_canvas, rect, frame);
}
if (!EncodeFrame(&config_lossy, sub_frame, &mem2)) {
error_code = sub_frame->error_code;
goto Err;
}
}
@ -478,12 +484,12 @@ static int SetFrame(const WebPConfig* const config, int allow_mixed,
} else {
GetEncodedData(try_lossless ? &mem1 : &mem2, encoded_data);
}
return 1;
return error_code;
Err:
WebPMemoryWriterClear(&mem1);
WebPMemoryWriterClear(&mem2);
return 0;
return error_code;
}
#undef MIN_COLORS_LOSSY
@ -518,7 +524,8 @@ int WebPFrameCacheAddFrame(WebPFrameCache* const cache,
WebPPicture* const frame,
WebPMuxFrameInfo* const info) {
int ok = 0;
WebPFrameRect rect = *orig_rect;
WebPEncodingError error_code = VP8_ENC_OK;
WebPFrameRect rect;
WebPPicture sub_image; // View extracted from 'frame' with rectangle 'rect'.
WebPPicture* const prev_canvas = &cache->prev_canvas;
const size_t position = cache->count;
@ -526,11 +533,23 @@ int WebPFrameCacheAddFrame(WebPFrameCache* const cache,
EncodedFrame* const encoded_frame = CacheGetFrame(cache, position);
assert(position < cache->size);
// Snap to even offsets (and adjust dimensions if needed).
rect.width += (rect.x_offset & 1);
rect.height += (rect.y_offset & 1);
rect.x_offset &= ~1;
rect.y_offset &= ~1;
if (frame == NULL || info == NULL) {
return 0;
}
if (orig_rect != NULL) {
rect = *orig_rect;
// Snap to even offsets (and adjust dimensions if needed).
rect.width += (rect.x_offset & 1);
rect.height += (rect.y_offset & 1);
rect.x_offset &= ~1;
rect.y_offset &= ~1;
} else {
rect.width = frame->width;
rect.height = frame->height;
rect.x_offset = 0;
rect.y_offset = 0;
}
if (!WebPPictureView(frame, rect.x_offset, rect.y_offset,
rect.width, rect.height, &sub_image)) {
@ -543,8 +562,9 @@ int WebPFrameCacheAddFrame(WebPFrameCache* const cache,
if (cache->is_first_frame || IsKeyFrame(frame, &rect, prev_canvas)) {
// Add this as a key frame.
if (!SetFrame(config, allow_mixed, 1, NULL, NULL, NULL, info, &sub_image,
encoded_frame)) {
error_code = SetFrame(config, allow_mixed, 1, NULL, NULL, NULL,
info, &sub_image, encoded_frame);
if (error_code != VP8_ENC_OK) {
goto End;
}
cache->keyframe = position;
@ -556,8 +576,9 @@ int WebPFrameCacheAddFrame(WebPFrameCache* const cache,
++cache->count_since_key_frame;
if (cache->count_since_key_frame <= cache->kmin) {
// Add this as a frame rectangle.
if (!SetFrame(config, allow_mixed, 0, prev_canvas, frame, &rect, info,
&sub_image, encoded_frame)) {
error_code = SetFrame(config, allow_mixed, 0, prev_canvas, frame,
&rect, info, &sub_image, encoded_frame);
if (error_code != VP8_ENC_OK) {
goto End;
}
cache->flush_count = cache->count;
@ -566,12 +587,12 @@ int WebPFrameCacheAddFrame(WebPFrameCache* const cache,
} else {
WebPPicture full_image;
WebPMuxFrameInfo full_image_info;
int frame_added;
int64_t curr_delta;
// Add frame rectangle to cache.
if (!SetFrame(config, allow_mixed, 0, prev_canvas, frame, &rect, info,
&sub_image, encoded_frame)) {
error_code = SetFrame(config, allow_mixed, 0, prev_canvas, frame, &rect,
info, &sub_image, encoded_frame);
if (error_code != VP8_ENC_OK) {
goto End;
}
@ -587,10 +608,10 @@ int WebPFrameCacheAddFrame(WebPFrameCache* const cache,
full_image_info.y_offset = rect.y_offset;
// Add key frame to cache, too.
frame_added = SetFrame(config, allow_mixed, 1, NULL, NULL, NULL,
&full_image_info, &full_image, encoded_frame);
error_code = SetFrame(config, allow_mixed, 1, NULL, NULL, NULL,
&full_image_info, &full_image, encoded_frame);
WebPPictureFree(&full_image);
if (!frame_added) goto End;
if (error_code != VP8_ENC_OK) goto End;
// Analyze size difference of the two variants.
curr_delta = KeyFramePenalty(encoded_frame);
@ -620,6 +641,8 @@ int WebPFrameCacheAddFrame(WebPFrameCache* const cache,
FrameRelease(encoded_frame);
--cache->count; // We reset the count, as the frame addition failed.
}
frame->error_code = error_code; // report error_code
assert(ok || error_code != VP8_ENC_OK);
return ok;
}

3
examples/gif2webp_util.h
View File

@ -54,8 +54,9 @@ WebPFrameCache* WebPFrameCacheNew(int width, int height,
void WebPFrameCacheDelete(WebPFrameCache* const cache);
// Given an image described by 'frame', 'info' and 'orig_rect', optimize it for
// WebP, encode it and add it to 'cache'.
// WebP, encode it and add it to 'cache'. 'orig_rect' can be NULL.
// This takes care of frame disposal too, according to 'info->dispose_method'.
// Returns false in case of error (and sets frame->error_code accordingly).
int WebPFrameCacheAddFrame(WebPFrameCache* const cache,
const WebPConfig* const config,
const WebPFrameRect* const orig_rect,