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Record the lossless size stats.

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Record and show the lossless header and image data sizes in the cwebp.

Change-Id: I08f19693cb7a756b6fdce5b55d71f5367b5f02fc
This commit is contained in:
Vikas Arora 2014-09-17 14:11:52 -07:00
parent cddd334050
commit b901416b90
3 changed files with 21 additions and 4 deletions
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2
examples/cwebp.c
View File

@ -212,6 +212,8 @@ static void PrintFullLosslessInfo(const WebPAuxStats* const stats,
const char* const description) {
fprintf(stderr, "Lossless-%s compressed size: %d bytes\n",
description, stats->lossless_size);
fprintf(stderr, " * Header size: %d bytes, image data size: %d\n",
stats->lossless_hdr_size, stats->lossless_data_size);
if (stats->lossless_features) {
fprintf(stderr, " * Lossless features used:");
if (stats->lossless_features & 1) fprintf(stderr, " PREDICTION");

17
src/enc/vp8l.c
View File

@ -558,7 +558,10 @@ static WebPEncodingError EncodeImageInternal(VP8LBitWriter* const bw,
VP8LBackwardRefs refs_array[2],
int width, int height, int quality,
int cache_bits,
int histogram_bits) {
int histogram_bits,
size_t init_byte_position,
int* const hdr_size,
int* const data_size) {
WebPEncodingError err = VP8_ENC_OK;
const int use_2d_locality = 1;
const int use_color_cache = (cache_bits > 0);
@ -579,6 +582,8 @@ static WebPEncodingError EncodeImageInternal(VP8LBitWriter* const bw,
sizeof(*histogram_symbols));
assert(histogram_bits >= MIN_HUFFMAN_BITS);
assert(histogram_bits <= MAX_HUFFMAN_BITS);
assert(hdr_size != NULL);
assert(data_size != NULL);
VP8LBackwardRefsInit(&refs, refs_array[0].block_size_);
if (histogram_image == NULL || histogram_symbols == NULL) {
@ -676,9 +681,12 @@ static WebPEncodingError EncodeImageInternal(VP8LBitWriter* const bw,
}
}
*hdr_size = (int)(VP8LBitWriterNumBytes(bw) - init_byte_position);
// Store actual literals.
err = StoreImageToBitMask(bw, width, histogram_bits, &refs,
histogram_symbols, huffman_codes);
*data_size =
(int)(VP8LBitWriterNumBytes(bw) - init_byte_position - *hdr_size);
Error:
WebPSafeFree(tokens);
@ -1053,6 +1061,8 @@ WebPEncodingError VP8LEncodeStream(const WebPConfig* const config,
const int height = picture->height;
VP8LEncoder* const enc = VP8LEncoderNew(config, picture);
const size_t byte_position = VP8LBitWriterNumBytes(bw);
int hdr_size = 0;
int data_size = 0;
if (enc == NULL) {
err = VP8_ENC_ERROR_OUT_OF_MEMORY;
@ -1124,7 +1134,8 @@ WebPEncodingError VP8LEncodeStream(const WebPConfig* const config,
err = EncodeImageInternal(bw, enc->argb_, &enc->hash_chain_, enc->refs_,
enc->current_width_, height, quality,
enc->cache_bits_, enc->histo_bits_);
enc->cache_bits_, enc->histo_bits_,
byte_position, &hdr_size, &data_size);
if (err != VP8_ENC_OK) goto Error;
if (picture->stats != NULL) {
@ -1139,6 +1150,8 @@ WebPEncodingError VP8LEncodeStream(const WebPConfig* const config,
stats->cache_bits = enc->cache_bits_;
stats->palette_size = enc->palette_size_;
stats->lossless_size = (int)(VP8LBitWriterNumBytes(bw) - byte_position);
stats->lossless_hdr_size = hdr_size;
stats->lossless_data_size = data_size;
}
Error:

6
src/webp/encode.h
View File

@ -20,7 +20,7 @@
extern "C" {
#endif
#define WEBP_ENCODER_ABI_VERSION 0x0205 // MAJOR(8b) + MINOR(8b)
#define WEBP_ENCODER_ABI_VERSION 0x0206 // MAJOR(8b) + MINOR(8b)
// Note: forward declaring enumerations is not allowed in (strict) C and C++,
// the types are left here for reference.
@ -210,8 +210,10 @@ struct WebPAuxStats {
int cache_bits; // number of bits for color cache lookup
int palette_size; // number of color in palette, if used
int lossless_size; // final lossless size
int lossless_hdr_size; // lossless header (transform, huffman etc) size
int lossless_data_size; // lossless image data size
uint32_t pad[4]; // padding for later use
uint32_t pad[2]; // padding for later use
};
// Signature for output function. Should return true if writing was successful.