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Mux: make ValidateForSingleImage() method static

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Change-Id: I96ac5e3be26b8e8ecd9f055501a5feb7710bc324
This commit is contained in:
Urvang Joshi
2013-05-03 13:58:53 -07:00
parent fffefd18c3
commit 1d530c9a7e
3 changed files with 20 additions and 23 deletions
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23
src/mux/muxread.c
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@ -260,6 +260,24 @@ WebPMux* WebPMuxCreateInternal(const WebPData* bitstream, int copy_data,
//------------------------------------------------------------------------------
// Get API(s).
// Validates that the given mux has a single image.
static WebPMuxError ValidateForSingleImage(const WebPMux* const mux) {
const int num_images = MuxImageCount(mux->images_, WEBP_CHUNK_IMAGE);
const int num_frames = MuxImageCount(mux->images_, WEBP_CHUNK_ANMF);
const int num_fragments = MuxImageCount(mux->images_, WEBP_CHUNK_FRGM);
if (num_images == 0) {
// No images in mux.
return WEBP_MUX_NOT_FOUND;
} else if (num_images == 1 && num_frames == 0 && num_fragments == 0) {
// Valid case (single image).
return WEBP_MUX_OK;
} else {
// Frame/Fragment case OR an invalid mux.
return WEBP_MUX_INVALID_ARGUMENT;
}
}
WebPMuxError MuxGetCanvasSize(const WebPMux* const mux, int* width,
int* height) {
int w, h;
@ -272,7 +290,7 @@ WebPMuxError MuxGetCanvasSize(const WebPMux* const mux, int* width,
w = GetLE24(data.bytes + 4) + 1;
h = GetLE24(data.bytes + 7) + 1;
} else { // Single image case.
WebPMuxError err = MuxValidateForImage(mux);
WebPMuxError err = ValidateForSingleImage(mux);
if (err != WEBP_MUX_OK) return err;
err = MuxGetImageWidthHeight(mux->images_->img_, &w, &h);
if (err != WEBP_MUX_OK) return err;
@ -291,7 +309,6 @@ WebPMuxError WebPMuxGetCanvasSize(const WebPMux* mux, int* width, int* height) {
return MuxGetCanvasSize(mux, width, height);
}
WebPMuxError WebPMuxGetFeatures(const WebPMux* mux, uint32_t* flags) {
WebPData data;
@ -303,7 +320,7 @@ WebPMuxError WebPMuxGetFeatures(const WebPMux* mux, uint32_t* flags) {
if (data.size < CHUNK_SIZE_BYTES) return WEBP_MUX_BAD_DATA;
*flags = GetLE32(data.bytes); // All OK. Fill up flags.
} else {
WebPMuxError err = MuxValidateForImage(mux); // Check for single image.
WebPMuxError err = ValidateForSingleImage(mux); // Check for single image.
if (err != WEBP_MUX_OK) return err;
if (MuxHasLosslessImages(mux->images_)) {
const WebPData* const vp8l_data = &mux->images_->img_->data_;