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Implement progress report (and user abort)

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New cwebp flag is -progress

Change-Id: Ied872cca13f512036860783bbee1bdbccad72768
This commit is contained in:
Pascal Massimino
2011-12-01 02:24:50 -08:00
committed by James Zern
parent eda520a92e
commit 30971c9e95
14 changed files with 160 additions and 47 deletions
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15
src/webp/encode.h
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@ -20,7 +20,7 @@
extern "C" {
#endif
#define WEBP_ENCODER_ABI_VERSION 0x0002
#define WEBP_ENCODER_ABI_VERSION 0x0003
// Return the encoder's version number, packed in hexadecimal using 8bits for
// each of major/minor/revision. E.g: v2.5.7 is 0x020507.
@ -72,7 +72,7 @@ typedef struct {
int partition_limit; // quality degradation allowed to fit the 512k limit on
// prediction modes coding (0=no degradation, 100=full)
int alpha_compression; // Algorithm for encoding the alpha plane (0 = none,
// 1 = Backward reference counts encoded with
// 1 = backward reference counts encoded with
// arithmetic encoder). Default is 1.
int alpha_quality; // Between 0 (smallest size) and 100 (lossless).
// Default is 100.
@ -134,6 +134,9 @@ typedef struct {
int alpha_data_size; // size of the transparency data
int layer_data_size; // size of the enhancement layer data
void* user_data; // this field is free to be set to any value and
// used during callbacks (like progress-report e.g.).
} WebPAuxStats;
// Signature for output function. Should return 1 if writing was successful.
@ -142,6 +145,10 @@ typedef struct {
typedef int (*WebPWriterFunction)(const uint8_t* data, size_t data_size,
const WebPPicture* const picture);
// Progress hook, called from time to time to report progress. It can return 0
// to request an abort of the encoding process, or 1 otherwise if all is OK.
typedef int (*WebPProgressHook)(int percent, const WebPPicture* const picture);
typedef enum {
// chroma sampling
WEBP_YUV420 = 0, // 4:2:0
@ -169,6 +176,8 @@ typedef enum {
VP8_ENC_ERROR_PARTITION_OVERFLOW, // partition is bigger than 16M
VP8_ENC_ERROR_BAD_WRITE, // error while flushing bytes
VP8_ENC_ERROR_FILE_TOO_BIG, // file is bigger than 4G
VP8_ENC_ERROR_USER_ABORT, // abort request by user
VP8_ENC_ERROR_LAST // list terminator. always last.
} WebPEncodingError;
// maximum width/height allowed (inclusive), in pixels
@ -205,6 +214,8 @@ struct WebPPicture {
int uv0_stride;
WebPEncodingError error_code; // error code in case of problem.
WebPProgressHook progress_hook; // if not NULL, called while encoding.
};
// Internal, version-checked, entry point