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Merge "libwebp: add WebPDemux stub functions"

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pascal massimino
2012-06-12 23:57:18 -07:00
committed by Gerrit Code Review
parent 2f66668882 f8f94081be
commit 26bf223280
2 changed files with 72 additions and 0 deletions
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39
src/webp/mux.h
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@ -463,6 +463,45 @@ WEBP_EXTERN(WebPMuxError) WebPMuxNumChunks(const WebPMux* const mux,
WEBP_EXTERN(WebPMuxError) WebPMuxAssemble(WebPMux* const mux,
WebPData* const assembled_data);
//------------------------------------------------------------------------------
// Demux API.
// Enables extraction of image and extended format data from WebP files.
#define WEBP_DEMUX_ABI_VERSION 0x0000
typedef struct WebPDemuxer WebPDemuxer;
typedef enum {
WEBP_DEMUX_PARSING_HEADER, // Not enough data to parse full header.
WEBP_DEMUX_PARSED_HEADER, // Header parsing complete, data may be available.
WEBP_DEMUX_DONE // Entire file has been parsed.
} WebPDemuxState;
//------------------------------------------------------------------------------
// Life of a Demux object
// Internal, version-checked, entry point
WEBP_EXTERN(WebPDemuxer*) WebPDemuxInternal(
const WebPData* const, int, WebPDemuxState* const, int);
// Parses the WebP file given by 'data'.
// A complete WebP file must be present in 'data' for the function to succeed.
// Returns a WebPDemuxer object on successful parse, NULL otherwise.
static WEBP_INLINE WebPDemuxer* WebPDemux(const WebPData* const data) {
return WebPDemuxInternal(data, 0, NULL, WEBP_DEMUX_ABI_VERSION);
}
// Parses the WebP file given by 'data'.
// If 'state' is non-NULL it will be set to indicate the status of the demuxer.
// Returns a WebPDemuxer object on successful parse, NULL otherwise.
static WEBP_INLINE WebPDemuxer* WebPDemuxPartial(
const WebPData* const data, WebPDemuxState* const state) {
return WebPDemuxInternal(data, 1, state, WEBP_DEMUX_ABI_VERSION);
}
// Frees memory associated with 'dmux'.
WEBP_EXTERN(void) WebPDemuxDelete(WebPDemuxer* const dmux);
//------------------------------------------------------------------------------
#if defined(__cplusplus) || defined(c_plusplus)