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Merge "Add Mux library for manipulating WebP container."

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This commit is contained in:
James Zern 2011-09-27 11:55:45 -07:00 committed by Gerrit Code Review
commit 5f31b5ec64
6 changed files with 1626 additions and 4 deletions
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1
configure.ac
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@ -156,6 +156,7 @@ AC_CONFIG_FILES([Makefile src/Makefile man/Makefile \
examples/Makefile src/dec/Makefile \
src/enc/Makefile src/dsp/Makefile \
src/utils/Makefile \
src/mux/Makefile \
src/libwebp.pc])

12
makefile.unix
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@ -2,7 +2,7 @@
# system, for simple local building of the libraries and tools.
# It will not install the libraries system-wide, but just create the 'cwebp'
# and 'dwebp' tools in the examples/ directory, along with the static
# library 'src/libwebp.a'.
# libraries 'src/libwebp.a' and 'src/mux/libwebpmux.a'.
#
# To build the library and examples, use:
# make -f makefile.unix
@ -77,9 +77,9 @@ HDRS = src/webp/encode.h src/enc/vp8enci.h src/enc/cost.h \
src/dsp/yuv.h src/dsp/dsp.h \
src/utils/bit_writer.h src/utils/bit_reader.h src/utils/thread.h
OUTPUT = examples/cwebp examples/dwebp src/libwebp.a
OUTPUT = examples/cwebp examples/dwebp src/libwebp.a src/mux/libwebpmux.a
all:ex
all:ex src/mux/libwebpmux.a
%.o: %.c $(HDRS)
$(CC) $(CFLAGS) -c $< -o $@
@ -87,6 +87,11 @@ all:ex
src/libwebp.a: $(OBJS)
$(AR) $(ARFLAGS) $@ $^
MUX_OBJS = src/mux/mux.o
src/mux/libwebpmux.a: $(MUX_OBJS)
$(AR) $(ARFLAGS) $@ $^
ex: examples/cwebp examples/dwebp
examples/cwebp: examples/cwebp.o src/libwebp.a
@ -116,6 +121,7 @@ clean:
src/dec/*.o src/dec/*~ \
src/dsp/*.o src/dsp/*~ \
src/utils/*.o src/utils/*~ \
src/mux/*.o src/mux/*~ \
examples/*.o examples/*~
superclean: clean

2
src/Makefile.am
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@ -1,4 +1,4 @@
SUBDIRS = dec enc dsp utils
SUBDIRS = dec enc dsp utils mux
AM_CPPFLAGS = -I$(top_srcdir)/src
lib_LTLIBRARIES = libwebp.la

7
src/mux/Makefile.am Normal file
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@ -0,0 +1,7 @@
AM_CPPFLAGS = -I$(top_srcdir)/src
lib_LTLIBRARIES = libwebpmux.la
libwebpmux_la_SOURCES = mux.c
libwebpmux_la_LDFLAGS = -version-info 0:0:0
libwebpmuxinclude_HEADERS = ../webp/mux.h ../webp/types.h
libwebpmuxincludedir = $(includedir)/webp

1321
src/mux/mux.c Normal file
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File diff suppressed because it is too large Load Diff

287
src/webp/mux.h Normal file
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@ -0,0 +1,287 @@
// Copyright 2011 Google Inc.
//
// This code is licensed under the same terms as WebM:
// Software License Agreement: http://www.webmproject.org/license/software/
// Additional IP Rights Grant: http://www.webmproject.org/license/additional/
// -----------------------------------------------------------------------------
//
// RIFF container manipulation for WEBP images.
//
// Author: Urvang (urvang@google.com)
#ifndef WEBP_WEBP_MUX_H_
#define WEBP_WEBP_MUX_H_
#include "webp/types.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
// Error codes
typedef enum {
WEBP_MUX_OK = 1,
WEBP_MUX_ERROR = 0,
WEBP_MUX_NOT_FOUND = -1,
WEBP_MUX_INVALID_ARGUMENT = -2,
WEBP_MUX_INVALID_PARAMETER = -3,
WEBP_MUX_BAD_DATA = -4,
WEBP_MUX_MEMORY_ERROR = -5
} WebPMuxError;
// Flag values for different features used in VP8X chunk.
typedef enum {
TILE_FLAG = 0x00000001,
ANIMATION_FLAG = 0x00000002,
ICCP_FLAG = 0x00000004,
META_FLAG = 0x00000008
} FeatureFlags;
typedef struct WebPMux WebPMux; // main opaque object.
//------------------------------------------------------------------------------
// Life of a Mux object
// Creates an empty mux object.
// Returns:
// A pointer to the newly created empty mux object.
WEBP_EXTERN(WebPMux*) WebPMuxNew(void);
// Deletes the mux object.
WEBP_EXTERN(void) WebPMuxDelete(WebPMux* const mux);
//------------------------------------------------------------------------------
// Writing
// Creates a mux object from raw data given in WebP RIFF format.
// WebPMuxNew() should be called before calling this function.
// copy_data - value 1 indicates given data WILL copied to the mux object, and
// value 0 indicates data will NOT be copied.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL or data is NULL
// WEBP_MUX_BAD_DATA - if data cannot be read as a mux object.
// WEBP_MUX_MEMORY_ERROR - on memory allocation error.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxCreate(WebPMux* const mux, const uint8_t* data,
uint32_t size, int copy_data);
// Sets the XMP metadata in the mux object. Any existing metadata chunk(s) will
// be removed.
// copy_data - value 1 indicates given data WILL copied to the mux object, and
// value 0 indicates data will NOT be copied.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL or data is NULL.
// WEBP_MUX_MEMORY_ERROR - on memory allocation error.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxSetMetadata(WebPMux* const mux,
const uint8_t* data,
uint32_t size, int copy_data);
// Sets the color profile in the mux object. Any existing color profile chunk(s)
// will be removed.
// copy_data - value 1 indicates given data WILL copied to the mux object, and
// value 0 indicates data will NOT be copied.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL or data is NULL
// WEBP_MUX_MEMORY_ERROR - on memory allocation error
// WEBP_MUX_OK - on success
WEBP_EXTERN(WebPMuxError) WebPMuxSetColorProfile(WebPMux* const mux,
const uint8_t* data,
uint32_t size, int copy_data);
// Sets the animation loop count in the mux object. Any existing loop count
// value(s) will be removed.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL
// WEBP_MUX_MEMORY_ERROR - on memory allocation error.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxSetLoopCount(WebPMux* const mux,
uint32_t loop_count);
// Adds an animation frame to the mux object.
// nth=0 has a special meaning - last position.
// duration is in milliseconds.
// copy_data - value 1 indicates given data WILL copied to the mux object, and
// value 0 indicates data will NOT be copied.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL or data is NULL
// WEBP_MUX_NOT_FOUND - If we have less than (nth-1) frames before adding.
// WEBP_MUX_MEMORY_ERROR - on memory allocation error.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxAddFrame(WebPMux* const mux, uint32_t nth,
const uint8_t* data, uint32_t size,
uint32_t x_offset, uint32_t y_offset,
uint32_t duration, int copy_data);
// Adds a tile to the mux object.
// nth=0 has a special meaning - last position.
// copy_data - value 1 indicates given data WILL copied to the mux object, and
// value 0 indicates data will NOT be copied.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL or data is NULL
// WEBP_MUX_NOT_FOUND - If we have less than (nth-1) tiles before adding.
// WEBP_MUX_MEMORY_ERROR - on memory allocation error.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxAddTile(WebPMux* const mux, uint32_t nth,
const uint8_t* data, uint32_t size,
uint32_t x_offset, uint32_t y_offset,
int copy_data);
// Adds a chunk with given tag at nth position.
// nth=0 has a special meaning - last position.
// copy_data - value 1 indicates given data WILL copied to the mux object, and
// value 0 indicates data will NOT be copied.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if either mux, tag or data is NULL
// WEBP_MUX_INVALID_PARAMETER - if tag is invalid.
// WEBP_MUX_MEMORY_ERROR - on memory allocation error.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxAddNamedData(WebPMux* const mux, uint32_t nth,
const char* const tag,
const uint8_t* data,
uint32_t size, int copy_data);
// Deletes the XMP metadata in the mux object.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL
// WEBP_MUX_NOT_FOUND - If mux does not contain metadata.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxDeleteMetadata(WebPMux* const mux);
// Deletes the color profile in the mux object.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL
// WEBP_MUX_NOT_FOUND - If mux does not contain color profile.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxDeleteColorProfile(WebPMux* const mux);
// Deletes an animation frame from the mux object.
// nth=0 has a special meaning - last position.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL
// WEBP_MUX_NOT_FOUND - If there are less than nth frames in the mux object
// before deletion.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxDeleteFrame(WebPMux* const mux, uint32_t nth);
// Deletes a tile from the mux object.
// nth=0 has a special meaning - last position
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL
// WEBP_MUX_NOT_FOUND - If there are less than nth tiles in the mux object
// before deletion.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxDeleteTile(WebPMux* const mux, uint32_t nth);
// Assembles all chunks in WebP RIFF format and returns in output_data.
// This function also validates the mux object.
// This function does NOT free the mux object. The caller function should free
// the mux object and output_data after output_data has been consumed.
// Returns:
// WEBP_MUX_BAD_DATA - if mux object is invalid.
// WEBP_MUX_INVALID_ARGUMENT - if either mux, output_data or output_size is
// NULL.
// WEBP_MUX_MEMORY_ERROR - on memory allocation error.
// WEBP_MUX_OK - on success
WEBP_EXTERN(WebPMuxError) WebPMuxAssemble(WebPMux* const mux,
uint8_t** output_data,
uint32_t* output_size);
//------------------------------------------------------------------------------
// Reading
// Gets the feature flags from the mux object.
// Use enum 'FeatureFlags' to test for individual features.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL or flags is NULL
// WEBP_MUX_NOT_FOUND - if VP8X chunk is not present in mux object.
// WEBP_MUX_BAD_DATA - if VP8X chunk in mux is invalid.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxGetFeatures(const WebPMux* mux,
uint32_t* flags);
// Gets a reference to the XMP metadata in the mux object.
// The caller should not free the returned data.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if either of mux, data or size is NULL
// WEBP_MUX_NOT_FOUND - if metadata is not present in mux object.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxGetMetadata(const WebPMux* mux,
const uint8_t** data,
uint32_t* size);
// Gets a reference to the color profile in the mux object.
// The caller should not free the returned data.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if either of mux, data or size is NULL
// WEBP_MUX_NOT_FOUND - if color profile is not present in mux object.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxGetColorProfile(const WebPMux* mux,
const uint8_t** data,
uint32_t* size);
// Gets the animation loop count from the mux object.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if either of mux or loop_count is NULL
// WEBP_MUX_NOT_FOUND - if loop chunk is not present in mux object.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxGetLoopCount(const WebPMux* mux,
uint32_t* loop_count);
// Gets a reference to the nth animation frame from the mux object.
// nth=0 has a special meaning - last position.
// duration is in milliseconds.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if either mux, data, size, x_offset,
// y_offset, or duration is NULL
// WEBP_MUX_NOT_FOUND - if there are less than nth frames in the mux object.
// WEBP_MUX_BAD_DATA - if nth frame chunk in mux is invalid.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxGetFrame(const WebPMux* mux, uint32_t nth,
const uint8_t** data, uint32_t* size,
uint32_t* x_offset,
uint32_t* y_offset,
uint32_t* duration);
// Gets a reference to the nth tile from the mux object.
// The caller should not free the returned data.
// nth=0 has a special meaning - last position.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if either mux, data, size, x_offset or
// y_offset is NULL
// WEBP_MUX_NOT_FOUND - if there are less than nth tiles in the mux object.
// WEBP_MUX_BAD_DATA - if nth tile chunk in mux is invalid.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxGetTile(const WebPMux* mux, uint32_t nth,
const uint8_t** data, uint32_t* size,
uint32_t* x_offset,
uint32_t* y_offset);
// Gets number of chunks having tag value tag in the mux object.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if either mux, tag or num_elements is NULL
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxNumNamedElements(const WebPMux* mux,
const char* tag,
int* num_elements);
// Gets a reference to the nth chunk having tag value tag in the mux object.
// The caller should not free the returned data.
// nth=0 has a special meaning - last position.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if either mux, tag, data or size is NULL
// WEBP_MUX_NOT_FOUND - If there are less than nth named elements in the mux
// object.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxGetNamedData(const WebPMux* mux,
const char* tag, uint32_t nth,
const uint8_t** data,
uint32_t* size);
//------------------------------------------------------------------------------
#if defined(__cplusplus) || defined(c_plusplus)
} // extern "C"
#endif
#endif /* WEBP_WEBP_MUX_H_ */