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add WebPFree() to the API
this should be used in preference to free() for releasing memory returned from WebPDecode*() / WebPEncode*(). this simplifies memory management when working through language bindings Change-Id: I15eb538a45390efc552fda8e5c251a3fbdc13c29
This commit is contained in:
James Zern
parent
0ae2c2e4b2
commit
822f113ebb
16
Makefile.vc
16
Makefile.vc
@ -118,9 +118,7 @@ LIBWEBP = $(DIRLIB)\$(LIBWEBP_BASENAME).lib
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LIBWEBPMUX = $(DIRLIB)\$(LIBWEBPMUX_BASENAME).lib
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LIBWEBPDEMUX = $(DIRLIB)\$(LIBWEBPDEMUX_BASENAME).lib
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!ELSE IF "$(DLLBUILD)" == "TRUE"
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DLLC = webp_dll.c
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DLLINC = webp_dll.h
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DLL_OBJS = $(DIROBJ)\$(DLLC:.c=.obj)
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CC = $(CC) /I$(DIROBJ) /FI$(DLLINC) $(RTLIB) /DWEBP_DLL
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LIBWEBPDECODER = $(DIRLIB)\$(LIBWEBPDECODER_BASENAME)_dll.lib
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LIBWEBP = $(DIRLIB)\$(LIBWEBP_BASENAME)_dll.lib
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@ -350,7 +348,7 @@ $(LIBWEBP_OBJS) $(LIBWEBPMUX_OBJS) $(LIBWEBPDEMUX_OBJS): $(OUTPUT_DIRS)
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!IF "$(DLLBUILD)" == "TRUE"
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$(LIBWEBP_OBJS) $(LIBWEBPMUX_OBJS) $(LIBWEBPDEMUX_OBJS): \
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$(DIROBJ)\$(DLLINC) $(DIROBJ)\$(DLLC)
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$(DIROBJ)\$(DLLINC)
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{$(DIROBJ)}.c{$(DIROBJ)}.obj:
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$(CC) $(CFLAGS) /Fd$(LIBWEBP_PDBNAME) /Fo$@ $<
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@ -363,7 +361,7 @@ $(LIBWEBPDECODER) $(LIBWEBP) $(LIBWEBPMUX) $(LIBWEBPDEMUX):
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-xcopy $(DIROBJ)\*.pdb $(DIRLIB) /y
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clean::
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@-erase /s $(DIROBJ)\$(DLLC) $(DIROBJ)\$(DLLINC) 2> NUL
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@-erase /s $(DIROBJ)\$(DLLINC) 2> NUL
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!ELSE
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$(LIBWEBPDECODER) $(LIBWEBP) $(LIBWEBPMUX) $(LIBWEBPDEMUX):
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$(LNKLIB) /out:$@ $**
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@ -380,16 +378,6 @@ $(DIROBJ)\$(DLLINC):
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@echo #define WEBP_EXTERN(type) __declspec(dllexport) type >> $@
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@echo #endif /* WEBP_DLL_H_ */ >> $@
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# expose a WebPFree() function for use in managed code
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$(DIROBJ)\$(DLLC): $(DIROBJ)\$(DLLINC)
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@echo #include ^<stdlib.h^> > $@
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@echo #include "webp_dll.h" >> $@
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@echo // This function should be used in place of free() for memory >> $@
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@echo // returned by the WebP API. >> $@
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@echo WEBP_EXTERN(void) WebPFree(void* ptr) { >> $@
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@echo free(ptr); >> $@
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@echo } >> $@
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.SUFFIXES: .c .cc .obj .res .exe
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# File-specific flag builds. Note batch rules take precedence over wildcards,
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# so for now name each file individually.
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@ -12,6 +12,7 @@
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// Author: Skal (pascal.massimino@gmail.com)
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#include <stdlib.h>
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#include "../webp/decode.h"
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#include "./utils.h"
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// If PRINT_MEM_INFO is defined, extra info (like total memory used, number of
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@ -208,4 +209,9 @@ void WebPSafeFree(void* const ptr) {
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free(ptr);
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}
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// Public API function.
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void WebPFree(void* ptr) {
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free(ptr);
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}
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//------------------------------------------------------------------------------
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@ -20,7 +20,7 @@
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extern "C" {
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#endif
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#define WEBP_DECODER_ABI_VERSION 0x0205 // MAJOR(8b) + MINOR(8b)
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#define WEBP_DECODER_ABI_VERSION 0x0206 // MAJOR(8b) + MINOR(8b)
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// Note: forward declaring enumerations is not allowed in (strict) C and C++,
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// the types are left here for reference.
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@ -48,7 +48,7 @@ WEBP_EXTERN(int) WebPGetInfo(const uint8_t* data, size_t data_size,
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// Decodes WebP images pointed to by 'data' and returns RGBA samples, along
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// with the dimensions in *width and *height. The ordering of samples in
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// memory is R, G, B, A, R, G, B, A... in scan order (endian-independent).
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// The returned pointer should be deleted calling free().
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// The returned pointer should be deleted calling WebPFree().
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// Returns NULL in case of error.
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WEBP_EXTERN(uint8_t*) WebPDecodeRGBA(const uint8_t* data, size_t data_size,
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int* width, int* height);
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@ -73,9 +73,9 @@ WEBP_EXTERN(uint8_t*) WebPDecodeBGR(const uint8_t* data, size_t data_size,
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// Decode WebP images pointed to by 'data' to Y'UV format(*). The pointer
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// returned is the Y samples buffer. Upon return, *u and *v will point to
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// the U and V chroma data. These U and V buffers need NOT be free()'d,
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// unlike the returned Y luma one. The dimension of the U and V planes
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// are both (*width + 1) / 2 and (*height + 1)/ 2.
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// the U and V chroma data. These U and V buffers need NOT be passed to
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// WebPFree(), unlike the returned Y luma one. The dimension of the U and V
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// planes are both (*width + 1) / 2 and (*height + 1)/ 2.
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// Upon return, the Y buffer has a stride returned as '*stride', while U and V
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// have a common stride returned as '*uv_stride'.
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// Return NULL in case of error.
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@ -85,6 +85,9 @@ WEBP_EXTERN(uint8_t*) WebPDecodeYUV(const uint8_t* data, size_t data_size,
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uint8_t** u, uint8_t** v,
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int* stride, int* uv_stride);
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// Releases memory returned by the WebPDecode*() functions above.
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WEBP_EXTERN(void) WebPFree(void* ptr);
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// These five functions are variants of the above ones, that decode the image
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// directly into a pre-allocated buffer 'output_buffer'. The maximum storage
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// available in this buffer is indicated by 'output_buffer_size'. If this
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@ -20,7 +20,7 @@
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extern "C" {
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#endif
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#define WEBP_ENCODER_ABI_VERSION 0x0206 // MAJOR(8b) + MINOR(8b)
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#define WEBP_ENCODER_ABI_VERSION 0x0207 // MAJOR(8b) + MINOR(8b)
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// Note: forward declaring enumerations is not allowed in (strict) C and C++,
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// the types are left here for reference.
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@ -42,7 +42,7 @@ WEBP_EXTERN(int) WebPGetEncoderVersion(void);
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// Returns the size of the compressed data (pointed to by *output), or 0 if
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// an error occurred. The compressed data must be released by the caller
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// using the call 'free(*output)'.
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// using the call 'WebPFree(*output)'.
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// These functions compress using the lossy format, and the quality_factor
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// can go from 0 (smaller output, lower quality) to 100 (best quality,
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// larger output).
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@ -75,6 +75,9 @@ WEBP_EXTERN(size_t) WebPEncodeLosslessBGRA(const uint8_t* bgra,
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int width, int height, int stride,
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uint8_t** output);
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// Releases memory returned by the WebPEncode*() functions above.
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WEBP_EXTERN(void) WebPFree(void* ptr);
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//------------------------------------------------------------------------------
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// Coding parameters
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