diff options
Diffstat (limited to 'media/libwebp/src/webp/decode.h')
| -rw-r--r-- | media/libwebp/src/webp/decode.h | 114 |
1 files changed, 58 insertions, 56 deletions
diff --git a/media/libwebp/src/webp/decode.h b/media/libwebp/src/webp/decode.h index 0177b12089..d6895f5c55 100644 --- a/media/libwebp/src/webp/decode.h +++ b/media/libwebp/src/webp/decode.h @@ -48,34 +48,33 @@ WEBP_EXTERN int WebPGetDecoderVersion(void); // RIFF + VP8X + (optional chunks) + VP8(L) // ALPH + VP8 <-- Not a valid WebP format: only allowed for internal purpose. // VP8(L) <-- Not a valid WebP format: only allowed for internal purpose. -WEBP_EXTERN int WebPGetInfo(const uint8_t* data, size_t data_size, - int* width, int* height); +WEBP_NODISCARD WEBP_EXTERN int WebPGetInfo( + const uint8_t* data, size_t data_size, int* width, int* height); // Decodes WebP images pointed to by 'data' and returns RGBA samples, along // with the dimensions in *width and *height. The ordering of samples in // memory is R, G, B, A, R, G, B, A... in scan order (endian-independent). // The returned pointer should be deleted calling WebPFree(). // Returns NULL in case of error. -WEBP_EXTERN uint8_t* WebPDecodeRGBA(const uint8_t* data, size_t data_size, - int* width, int* height); +WEBP_NODISCARD WEBP_EXTERN uint8_t* WebPDecodeRGBA( + const uint8_t* data, size_t data_size, int* width, int* height); // Same as WebPDecodeRGBA, but returning A, R, G, B, A, R, G, B... ordered data. -WEBP_EXTERN uint8_t* WebPDecodeARGB(const uint8_t* data, size_t data_size, - int* width, int* height); +WEBP_NODISCARD WEBP_EXTERN uint8_t* WebPDecodeARGB( + const uint8_t* data, size_t data_size, int* width, int* height); // Same as WebPDecodeRGBA, but returning B, G, R, A, B, G, R, A... ordered data. -WEBP_EXTERN uint8_t* WebPDecodeBGRA(const uint8_t* data, size_t data_size, - int* width, int* height); +WEBP_NODISCARD WEBP_EXTERN uint8_t* WebPDecodeBGRA( + const uint8_t* data, size_t data_size, int* width, int* height); // Same as WebPDecodeRGBA, but returning R, G, B, R, G, B... ordered data. // If the bitstream contains transparency, it is ignored. -WEBP_EXTERN uint8_t* WebPDecodeRGB(const uint8_t* data, size_t data_size, - int* width, int* height); +WEBP_NODISCARD WEBP_EXTERN uint8_t* WebPDecodeRGB( + const uint8_t* data, size_t data_size, int* width, int* height); // Same as WebPDecodeRGB, but returning B, G, R, B, G, R... ordered data. -WEBP_EXTERN uint8_t* WebPDecodeBGR(const uint8_t* data, size_t data_size, - int* width, int* height); - +WEBP_NODISCARD WEBP_EXTERN uint8_t* WebPDecodeBGR( + const uint8_t* data, size_t data_size, int* width, int* height); // Decode WebP images pointed to by 'data' to Y'UV format(*). The pointer // returned is the Y samples buffer. Upon return, *u and *v will point to @@ -87,10 +86,9 @@ WEBP_EXTERN uint8_t* WebPDecodeBGR(const uint8_t* data, size_t data_size, // 'width' and 'height' may be NULL, the other pointers must not be. // Returns NULL in case of error. // (*) Also named Y'CbCr. See: https://en.wikipedia.org/wiki/YCbCr -WEBP_EXTERN uint8_t* WebPDecodeYUV(const uint8_t* data, size_t data_size, - int* width, int* height, - uint8_t** u, uint8_t** v, - int* stride, int* uv_stride); +WEBP_NODISCARD WEBP_EXTERN uint8_t* WebPDecodeYUV( + const uint8_t* data, size_t data_size, int* width, int* height, + uint8_t** u, uint8_t** v, int* stride, int* uv_stride); // These five functions are variants of the above ones, that decode the image // directly into a pre-allocated buffer 'output_buffer'. The maximum storage @@ -100,22 +98,22 @@ WEBP_EXTERN uint8_t* WebPDecodeYUV(const uint8_t* data, size_t data_size, // The parameter 'output_stride' specifies the distance (in bytes) // between scanlines. Hence, output_buffer_size is expected to be at least // output_stride x picture-height. -WEBP_EXTERN uint8_t* WebPDecodeRGBAInto( +WEBP_NODISCARD WEBP_EXTERN uint8_t* WebPDecodeRGBAInto( const uint8_t* data, size_t data_size, uint8_t* output_buffer, size_t output_buffer_size, int output_stride); -WEBP_EXTERN uint8_t* WebPDecodeARGBInto( +WEBP_NODISCARD WEBP_EXTERN uint8_t* WebPDecodeARGBInto( const uint8_t* data, size_t data_size, uint8_t* output_buffer, size_t output_buffer_size, int output_stride); -WEBP_EXTERN uint8_t* WebPDecodeBGRAInto( +WEBP_NODISCARD WEBP_EXTERN uint8_t* WebPDecodeBGRAInto( const uint8_t* data, size_t data_size, uint8_t* output_buffer, size_t output_buffer_size, int output_stride); // RGB and BGR variants. Here too the transparency information, if present, // will be dropped and ignored. -WEBP_EXTERN uint8_t* WebPDecodeRGBInto( +WEBP_NODISCARD WEBP_EXTERN uint8_t* WebPDecodeRGBInto( const uint8_t* data, size_t data_size, uint8_t* output_buffer, size_t output_buffer_size, int output_stride); -WEBP_EXTERN uint8_t* WebPDecodeBGRInto( +WEBP_NODISCARD WEBP_EXTERN uint8_t* WebPDecodeBGRInto( const uint8_t* data, size_t data_size, uint8_t* output_buffer, size_t output_buffer_size, int output_stride); @@ -126,7 +124,7 @@ WEBP_EXTERN uint8_t* WebPDecodeBGRInto( // 'u_size' and 'v_size' respectively. // Pointer to the luma plane ('*luma') is returned or NULL if an error occurred // during decoding (or because some buffers were found to be too small). -WEBP_EXTERN uint8_t* WebPDecodeYUVInto( +WEBP_NODISCARD WEBP_EXTERN uint8_t* WebPDecodeYUVInto( const uint8_t* data, size_t data_size, uint8_t* luma, size_t luma_size, int luma_stride, uint8_t* u, size_t u_size, int u_stride, @@ -217,11 +215,11 @@ struct WebPDecBuffer { }; // Internal, version-checked, entry point -WEBP_EXTERN int WebPInitDecBufferInternal(WebPDecBuffer*, int); +WEBP_NODISCARD WEBP_EXTERN int WebPInitDecBufferInternal(WebPDecBuffer*, int); // Initialize the structure as empty. Must be called before any other use. // Returns false in case of version mismatch -static WEBP_INLINE int WebPInitDecBuffer(WebPDecBuffer* buffer) { +WEBP_NODISCARD static WEBP_INLINE int WebPInitDecBuffer(WebPDecBuffer* buffer) { return WebPInitDecBufferInternal(buffer, WEBP_DECODER_ABI_VERSION); } @@ -232,7 +230,7 @@ WEBP_EXTERN void WebPFreeDecBuffer(WebPDecBuffer* buffer); //------------------------------------------------------------------------------ // Enumeration of the status codes -typedef enum VP8StatusCode { +typedef enum WEBP_NODISCARD VP8StatusCode { VP8_STATUS_OK = 0, VP8_STATUS_OUT_OF_MEMORY, VP8_STATUS_INVALID_PARAM, @@ -251,23 +249,24 @@ typedef enum VP8StatusCode { // WebPIDecoder object. This object can be left in a SUSPENDED state if the // picture is only partially decoded, pending additional input. // Code example: -// -// WebPInitDecBuffer(&output_buffer); -// output_buffer.colorspace = mode; -// ... -// WebPIDecoder* idec = WebPINewDecoder(&output_buffer); -// while (additional_data_is_available) { -// // ... (get additional data in some new_data[] buffer) -// status = WebPIAppend(idec, new_data, new_data_size); -// if (status != VP8_STATUS_OK && status != VP8_STATUS_SUSPENDED) { -// break; // an error occurred. -// } -// -// // The above call decodes the current available buffer. -// // Part of the image can now be refreshed by calling -// // WebPIDecGetRGB()/WebPIDecGetYUVA() etc. -// } -// WebPIDelete(idec); +/* + WebPInitDecBuffer(&output_buffer); + output_buffer.colorspace = mode; + ... + WebPIDecoder* idec = WebPINewDecoder(&output_buffer); + while (additional_data_is_available) { + // ... (get additional data in some new_data[] buffer) + status = WebPIAppend(idec, new_data, new_data_size); + if (status != VP8_STATUS_OK && status != VP8_STATUS_SUSPENDED) { + break; // an error occurred. + } + + // The above call decodes the current available buffer. + // Part of the image can now be refreshed by calling + // WebPIDecGetRGB()/WebPIDecGetYUVA() etc. + } + WebPIDelete(idec); +*/ // Creates a new incremental decoder with the supplied buffer parameter. // This output_buffer can be passed NULL, in which case a default output buffer @@ -281,7 +280,8 @@ typedef enum VP8StatusCode { // within valid bounds. // All other fields of WebPDecBuffer MUST remain constant between calls. // Returns NULL if the allocation failed. -WEBP_EXTERN WebPIDecoder* WebPINewDecoder(WebPDecBuffer* output_buffer); +WEBP_NODISCARD WEBP_EXTERN WebPIDecoder* WebPINewDecoder( + WebPDecBuffer* output_buffer); // This function allocates and initializes an incremental-decoder object, which // will output the RGB/A samples specified by 'csp' into a preallocated @@ -293,7 +293,7 @@ WEBP_EXTERN WebPIDecoder* WebPINewDecoder(WebPDecBuffer* output_buffer); // colorspace 'csp' is taken into account for allocating this buffer. All other // parameters are ignored. // Returns NULL if the allocation failed, or if some parameters are invalid. -WEBP_EXTERN WebPIDecoder* WebPINewRGB( +WEBP_NODISCARD WEBP_EXTERN WebPIDecoder* WebPINewRGB( WEBP_CSP_MODE csp, uint8_t* output_buffer, size_t output_buffer_size, int output_stride); @@ -308,7 +308,7 @@ WEBP_EXTERN WebPIDecoder* WebPINewRGB( // In this case, the output buffer will be automatically allocated (using // MODE_YUVA) when decoding starts. All parameters are then ignored. // Returns NULL if the allocation failed or if a parameter is invalid. -WEBP_EXTERN WebPIDecoder* WebPINewYUVA( +WEBP_NODISCARD WEBP_EXTERN WebPIDecoder* WebPINewYUVA( uint8_t* luma, size_t luma_size, int luma_stride, uint8_t* u, size_t u_size, int u_stride, uint8_t* v, size_t v_size, int v_stride, @@ -316,7 +316,7 @@ WEBP_EXTERN WebPIDecoder* WebPINewYUVA( // Deprecated version of the above, without the alpha plane. // Kept for backward compatibility. -WEBP_EXTERN WebPIDecoder* WebPINewYUV( +WEBP_NODISCARD WEBP_EXTERN WebPIDecoder* WebPINewYUV( uint8_t* luma, size_t luma_size, int luma_stride, uint8_t* u, size_t u_size, int u_stride, uint8_t* v, size_t v_size, int v_stride); @@ -346,21 +346,21 @@ WEBP_EXTERN VP8StatusCode WebPIUpdate( // (*last_y, *width etc.) can be NULL if corresponding information is not // needed. The values in these pointers are only valid on successful (non-NULL) // return. -WEBP_EXTERN uint8_t* WebPIDecGetRGB( +WEBP_NODISCARD WEBP_EXTERN uint8_t* WebPIDecGetRGB( const WebPIDecoder* idec, int* last_y, int* width, int* height, int* stride); // Same as above function to get a YUVA image. Returns pointer to the luma // plane or NULL in case of error. If there is no alpha information // the alpha pointer '*a' will be returned NULL. -WEBP_EXTERN uint8_t* WebPIDecGetYUVA( +WEBP_NODISCARD WEBP_EXTERN uint8_t* WebPIDecGetYUVA( const WebPIDecoder* idec, int* last_y, uint8_t** u, uint8_t** v, uint8_t** a, int* width, int* height, int* stride, int* uv_stride, int* a_stride); // Deprecated alpha-less version of WebPIDecGetYUVA(): it will ignore the // alpha information (if present). Kept for backward compatibility. -static WEBP_INLINE uint8_t* WebPIDecGetYUV( +WEBP_NODISCARD static WEBP_INLINE uint8_t* WebPIDecGetYUV( const WebPIDecoder* idec, int* last_y, uint8_t** u, uint8_t** v, int* width, int* height, int* stride, int* uv_stride) { return WebPIDecGetYUVA(idec, last_y, u, v, NULL, width, height, @@ -373,7 +373,7 @@ static WEBP_INLINE uint8_t* WebPIDecGetYUV( // Returns NULL in case the incremental decoder object is in an invalid state. // Otherwise returns the pointer to the internal representation. This structure // is read-only, tied to WebPIDecoder's lifespan and should not be modified. -WEBP_EXTERN const WebPDecBuffer* WebPIDecodedArea( +WEBP_NODISCARD WEBP_EXTERN const WebPDecBuffer* WebPIDecodedArea( const WebPIDecoder* idec, int* left, int* top, int* width, int* height); //------------------------------------------------------------------------------ @@ -389,7 +389,7 @@ WEBP_EXTERN const WebPDecBuffer* WebPIDecodedArea( CHECK(WebPGetFeatures(data, data_size, &config.input) == VP8_STATUS_OK); // C) Adjust 'config', if needed - config.no_fancy_upsampling = 1; + config.options.no_fancy_upsampling = 1; config.output.colorspace = MODE_BGRA; // etc. @@ -468,12 +468,14 @@ struct WebPDecoderConfig { }; // Internal, version-checked, entry point -WEBP_EXTERN int WebPInitDecoderConfigInternal(WebPDecoderConfig*, int); +WEBP_NODISCARD WEBP_EXTERN int WebPInitDecoderConfigInternal(WebPDecoderConfig*, + int); // Initialize the configuration as empty. This function must always be // called first, unless WebPGetFeatures() is to be called. // Returns false in case of mismatched version. -static WEBP_INLINE int WebPInitDecoderConfig(WebPDecoderConfig* config) { +WEBP_NODISCARD static WEBP_INLINE int WebPInitDecoderConfig( + WebPDecoderConfig* config) { return WebPInitDecoderConfigInternal(config, WEBP_DECODER_ABI_VERSION); } @@ -488,8 +490,8 @@ static WEBP_INLINE int WebPInitDecoderConfig(WebPDecoderConfig* config) { // The return WebPIDecoder object must always be deleted calling WebPIDelete(). // Returns NULL in case of error (and config->status will then reflect // the error condition, if available). -WEBP_EXTERN WebPIDecoder* WebPIDecode(const uint8_t* data, size_t data_size, - WebPDecoderConfig* config); +WEBP_NODISCARD WEBP_EXTERN WebPIDecoder* WebPIDecode( + const uint8_t* data, size_t data_size, WebPDecoderConfig* config); // Non-incremental version. This version decodes the full data at once, taking // 'config' into account. Returns decoding status (which should be VP8_STATUS_OK |