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introduce a separate WebPRescalerDspInit to initialize pointers

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so that we keep the details of WebPRescaler in utils/rescaler.c
when possible.

Change-Id: Ib6c1029a09b84cbc7a7d2f70dafa4d4d9132cecc
This commit is contained in:
Pascal Massimino
2015-01-10 06:46:00 -08:00
committed by James Zern
parent cbcdd5ffaf
commit ab66becaae
4 changed files with 77 additions and 54 deletions
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14
src/utils/rescaler.h
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@ -20,8 +20,11 @@ extern "C" {
#include "../webp/types.h"
#define WEBP_RESCALER_RFIX 30 // fixed-point precision for multiplies
// Structure used for on-the-fly rescaling
typedef struct {
typedef struct WebPRescaler WebPRescaler;
struct WebPRescaler {
int x_expand; // true if we're expanding in the x direction
int num_channels; // bytes to jump between pixels
int fy_scale, fx_scale; // fixed-point scaling factor
@ -35,7 +38,7 @@ typedef struct {
uint8_t* dst;
int dst_stride;
int32_t* irow, *frow; // work buffer
} WebPRescaler;
};
// Initialize a rescaler given scratch area 'work' and dimensions of src & dst.
void WebPRescalerInit(WebPRescaler* const rescaler,
@ -57,13 +60,6 @@ int WebPRescaleNeededLines(const WebPRescaler* const rescaler,
int WebPRescalerImport(WebPRescaler* const rescaler, int num_rows,
const uint8_t* src, int src_stride);
// Import a row of data and save its contribution in the rescaler.
// 'channel' denotes the channel number to be imported.
extern void (*WebPRescalerImportRow)(WebPRescaler* const wrk,
const uint8_t* const src, int channel);
// Export one row (starting at x_out position) from rescaler.
extern void (*WebPRescalerExportRow)(WebPRescaler* const wrk, int x_out);
// Return true if there is pending output rows ready.
static WEBP_INLINE
int WebPRescalerHasPendingOutput(const WebPRescaler* const rescaler) {