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libwebp/examples/cwebp.c
James Zern 00b29e282f normalize example header includes 
headers from examples/ aren't installed so prefix with './' to be
explicit.

Change-Id: Ie6c1544a026a9859b7fc0cf238b21e031ef0013f
2012-05-15 13:48:11 -07:00

1070 lines
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// Copyright 2011 Google Inc. All Rights Reserved.
//
// 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/
// -----------------------------------------------------------------------------
//
// simple command line calling the WebPEncode function.
// Encodes a raw .YUV into WebP bitstream
//
// Author: Skal (pascal.massimino@gmail.com)
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef WEBP_HAVE_PNG
#include <png.h>
#endif
#ifdef WEBP_HAVE_JPEG
#include <setjmp.h> // note: this must be included *after* png.h
#include <jpeglib.h>
#endif
#ifdef HAVE_WINCODEC_H
#ifdef __MINGW32__
#define INITGUID // Without this GUIDs are declared extern and fail to link
#endif
#define CINTERFACE
#define COBJMACROS
#define _WIN32_IE 0x500 // Workaround bug in shlwapi.h when compiling C++
// code with COBJMACROS.
#include <shlwapi.h>
#include <windows.h>
#include <wincodec.h>
#endif /* HAVE_WINCODEC_H */
#include "webp/encode.h"
#include "./stopwatch.h"
#ifndef WEBP_DLL
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
extern void* VP8GetCPUInfo; // opaque forward declaration.
#if defined(__cplusplus) || defined(c_plusplus)
} // extern "C"
#endif
#endif // WEBP_DLL
//------------------------------------------------------------------------------
static int verbose = 0;
static int ReadYUV(FILE* in_file, WebPPicture* const pic) {
const int uv_width = (pic->width + 1) / 2;
const int uv_height = (pic->height + 1) / 2;
int y;
int ok = 0;
if (!WebPPictureAlloc(pic)) return ok;
for (y = 0; y < pic->height; ++y) {
if (fread(pic->y + y * pic->y_stride, pic->width, 1, in_file) != 1) {
goto End;
}
}
for (y = 0; y < uv_height; ++y) {
if (fread(pic->u + y * pic->uv_stride, uv_width, 1, in_file) != 1)
goto End;
}
for (y = 0; y < uv_height; ++y) {
if (fread(pic->v + y * pic->uv_stride, uv_width, 1, in_file) != 1)
goto End;
}
ok = 1;
End:
return ok;
}
#ifdef HAVE_WINCODEC_H
#define IFS(fn) \
do { \
if (SUCCEEDED(hr)) \
{ \
hr = (fn); \
if (FAILED(hr) && verbose) \
fprintf(stderr, #fn " failed %08x\n", hr); \
} \
} while (0)
// modified version of DEFINE_GUID from guiddef.h.
#define WEBP_DEFINE_GUID(name, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8) \
const GUID name = { l, w1, w2, { b1, b2, b3, b4, b5, b6, b7, b8 } }
#ifdef __cplusplus
#define MAKE_REFGUID(x) (x)
#else
#define MAKE_REFGUID(x) &(x)
#endif
static HRESULT OpenInputStream(const char* filename, IStream** ppStream) {
HRESULT hr = S_OK;
IFS(SHCreateStreamOnFileA(filename, STGM_READ, ppStream));
if (FAILED(hr))
fprintf(stderr, "Error opening input file %s (%08x)\n", filename, hr);
return hr;
}
static HRESULT ReadPictureWithWIC(const char* filename,
WebPPicture* const pic, int keep_alpha) {
HRESULT hr = S_OK;
IWICBitmapFrameDecode* pFrame = NULL;
IWICFormatConverter* pConverter = NULL;
IWICImagingFactory* pFactory = NULL;
IWICBitmapDecoder* pDecoder = NULL;
IStream* pStream = NULL;
UINT frameCount = 0;
UINT width, height = 0;
BYTE* rgb = NULL;
WICPixelFormatGUID srcPixelFormat = { 0 };
GUID srcContainerFormat = { 0 };
const GUID* alphaContainers[] = {
&GUID_ContainerFormatBmp,
&GUID_ContainerFormatPng,
&GUID_ContainerFormatTiff
};
int has_alpha = 0;
int i, stride;
// From Microsoft SDK 7.0a
// Create local copies for compatibility when building against earlier
// versions of the SDK.
WEBP_DEFINE_GUID(GUID_WICPixelFormat24bppRGB_,
0x6fddc324, 0x4e03, 0x4bfe,
0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0d);
WEBP_DEFINE_GUID(GUID_WICPixelFormat32bppRGBA_,
0xf5c7ad2d, 0x6a8d, 0x43dd,
0xa7, 0xa8, 0xa2, 0x99, 0x35, 0x26, 0x1a, 0xe9);
WEBP_DEFINE_GUID(GUID_WICPixelFormat32bppBGRA_,
0x6fddc324, 0x4e03, 0x4bfe,
0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0f);
IFS(CoInitialize(NULL));
IFS(CoCreateInstance(MAKE_REFGUID(CLSID_WICImagingFactory), NULL,
CLSCTX_INPROC_SERVER, MAKE_REFGUID(IID_IWICImagingFactory),
(LPVOID*)&pFactory));
if (hr == REGDB_E_CLASSNOTREG) {
fprintf(stderr,
"Couldn't access Windows Imaging Component (are you running "
"Windows XP SP3 or newer?). Most formats not available. "
"Use -s for the available YUV input.\n");
}
// Prepare for image decoding.
IFS(OpenInputStream(filename, &pStream));
IFS(IWICImagingFactory_CreateDecoderFromStream(pFactory, pStream, NULL,
WICDecodeMetadataCacheOnDemand, &pDecoder));
IFS(IWICBitmapDecoder_GetFrameCount(pDecoder, &frameCount));
if (SUCCEEDED(hr) && frameCount == 0) {
fprintf(stderr, "No frame found in input file.\n");
hr = E_FAIL;
}
IFS(IWICBitmapDecoder_GetFrame(pDecoder, 0, &pFrame));
IFS(IWICBitmapFrameDecode_GetPixelFormat(pFrame, &srcPixelFormat));
IFS(IWICBitmapDecoder_GetContainerFormat(pDecoder, &srcContainerFormat));
has_alpha = keep_alpha;
for (i = 0;
has_alpha && i < sizeof(alphaContainers)/sizeof(alphaContainers[0]);
++i) {
if (IsEqualGUID(MAKE_REFGUID(srcContainerFormat),
MAKE_REFGUID(*alphaContainers[i]))) {
has_alpha =
IsEqualGUID(MAKE_REFGUID(srcPixelFormat),
MAKE_REFGUID(GUID_WICPixelFormat32bppRGBA_)) ||
IsEqualGUID(MAKE_REFGUID(srcPixelFormat),
MAKE_REFGUID(GUID_WICPixelFormat32bppBGRA_));
break;
}
}
// Prepare for pixel format conversion (if necessary).
IFS(IWICImagingFactory_CreateFormatConverter(pFactory, &pConverter));
IFS(IWICFormatConverter_Initialize(pConverter, (IWICBitmapSource*)pFrame,
has_alpha ? MAKE_REFGUID(GUID_WICPixelFormat32bppRGBA_)
: MAKE_REFGUID(GUID_WICPixelFormat24bppRGB_),
WICBitmapDitherTypeNone,
NULL, 0.0, WICBitmapPaletteTypeCustom));
// Decode.
IFS(IWICFormatConverter_GetSize(pConverter, &width, &height));
stride = (has_alpha ? 4 : 3) * width * sizeof(*rgb);
if (SUCCEEDED(hr)) {
rgb = (BYTE*)malloc(stride * height);
if (rgb == NULL)
hr = E_OUTOFMEMORY;
}
IFS(IWICFormatConverter_CopyPixels(pConverter, NULL, stride,
stride * height, rgb));
// WebP conversion.
if (SUCCEEDED(hr)) {
int ok;
pic->width = width;
pic->height = height;
ok = has_alpha ? WebPPictureImportRGBA(pic, rgb, stride)
: WebPPictureImportRGB(pic, rgb, stride);
if (!ok)
hr = E_FAIL;
}
if (SUCCEEDED(hr)) {
if (has_alpha && keep_alpha == 2) {
WebPCleanupTransparentArea(pic);
}
}
// Cleanup.
if (pConverter != NULL) IUnknown_Release(pConverter);
if (pFrame != NULL) IUnknown_Release(pFrame);
if (pDecoder != NULL) IUnknown_Release(pDecoder);
if (pFactory != NULL) IUnknown_Release(pFactory);
if (pStream != NULL) IUnknown_Release(pStream);
free(rgb);
return hr;
}
static int ReadPicture(const char* const filename, WebPPicture* const pic,
int keep_alpha) {
int ok;
if (pic->width != 0 && pic->height != 0) {
// If image size is specified, infer it as YUV format.
FILE* in_file = fopen(filename, "rb");
if (in_file == NULL) {
fprintf(stderr, "Error! Cannot open input file '%s'\n", filename);
return 0;
}
ok = ReadYUV(in_file, pic);
fclose(in_file);
} else {
// If no size specified, try to decode it using WIC.
ok = SUCCEEDED(ReadPictureWithWIC(filename, pic, keep_alpha));
}
if (!ok) {
fprintf(stderr, "Error! Could not process file %s\n", filename);
}
return ok;
}
#else // !HAVE_WINCODEC_H
#ifdef WEBP_HAVE_JPEG
struct my_error_mgr {
struct jpeg_error_mgr pub;
jmp_buf setjmp_buffer;
};
static void my_error_exit(j_common_ptr dinfo) {
struct my_error_mgr* myerr = (struct my_error_mgr*) dinfo->err;
(*dinfo->err->output_message) (dinfo);
longjmp(myerr->setjmp_buffer, 1);
}
static int ReadJPEG(FILE* in_file, WebPPicture* const pic) {
int ok = 0;
int stride, width, height;
uint8_t* rgb = NULL;
uint8_t* row_ptr = NULL;
struct jpeg_decompress_struct dinfo;
struct my_error_mgr jerr;
JSAMPARRAY buffer;
dinfo.err = jpeg_std_error(&jerr.pub);
jerr.pub.error_exit = my_error_exit;
if (setjmp(jerr.setjmp_buffer)) {
Error:
jpeg_destroy_decompress(&dinfo);
goto End;
}
jpeg_create_decompress(&dinfo);
jpeg_stdio_src(&dinfo, in_file);
jpeg_read_header(&dinfo, TRUE);
dinfo.out_color_space = JCS_RGB;
dinfo.dct_method = JDCT_IFAST;
dinfo.do_fancy_upsampling = TRUE;
jpeg_start_decompress(&dinfo);
if (dinfo.output_components != 3) {
goto Error;
}
width = dinfo.output_width;
height = dinfo.output_height;
stride = dinfo.output_width * dinfo.output_components * sizeof(*rgb);
rgb = (uint8_t*)malloc(stride * height);
if (rgb == NULL) {
goto End;
}
row_ptr = rgb;
buffer = (*dinfo.mem->alloc_sarray) ((j_common_ptr) &dinfo,
JPOOL_IMAGE, stride, 1);
if (buffer == NULL) {
goto End;
}
while (dinfo.output_scanline < dinfo.output_height) {
if (jpeg_read_scanlines(&dinfo, buffer, 1) != 1) {
goto End;
}
memcpy(row_ptr, buffer[0], stride);
row_ptr += stride;
}
jpeg_finish_decompress(&dinfo);
jpeg_destroy_decompress(&dinfo);
// WebP conversion.
pic->width = width;
pic->height = height;
ok = WebPPictureImportRGB(pic, rgb, stride);
End:
if (rgb) {
free(rgb);
}
return ok;
}
#else
static int ReadJPEG(FILE* in_file, WebPPicture* const pic) {
(void)in_file;
(void)pic;
fprintf(stderr, "JPEG support not compiled. Please install the libjpeg "
"development package before building.\n");
return 0;
}
#endif
#ifdef WEBP_HAVE_PNG
static void PNGAPI error_function(png_structp png, png_const_charp dummy) {
(void)dummy; // remove variable-unused warning
longjmp(png_jmpbuf(png), 1);
}
static int ReadPNG(FILE* in_file, WebPPicture* const pic, int keep_alpha) {
png_structp png;
png_infop info;
int color_type, bit_depth, interlaced;
int has_alpha;
int num_passes;
int p;
int ok = 0;
png_uint_32 width, height, y;
int stride;
uint8_t* rgb = NULL;
png = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
if (png == NULL) {
goto End;
}
png_set_error_fn(png, 0, error_function, NULL);
if (setjmp(png_jmpbuf(png))) {
Error:
png_destroy_read_struct(&png, NULL, NULL);
free(rgb);
goto End;
}
info = png_create_info_struct(png);
if (info == NULL) goto Error;
png_init_io(png, in_file);
png_read_info(png, info);
if (!png_get_IHDR(png, info,
&width, &height, &bit_depth, &color_type, &interlaced,
NULL, NULL)) goto Error;
png_set_strip_16(png);
png_set_packing(png);
if (color_type == PNG_COLOR_TYPE_PALETTE) png_set_palette_to_rgb(png);
if (color_type == PNG_COLOR_TYPE_GRAY ||
color_type == PNG_COLOR_TYPE_GRAY_ALPHA) {
if (bit_depth < 8) {
png_set_expand_gray_1_2_4_to_8(png);
}
png_set_gray_to_rgb(png);
}
if (png_get_valid(png, info, PNG_INFO_tRNS)) {
png_set_tRNS_to_alpha(png);
has_alpha = 1;
} else {
has_alpha = !!(color_type & PNG_COLOR_MASK_ALPHA);
}
if (!keep_alpha) {
png_set_strip_alpha(png);
has_alpha = 0;
}
num_passes = png_set_interlace_handling(png);
png_read_update_info(png, info);
stride = (has_alpha ? 4 : 3) * width * sizeof(*rgb);
rgb = (uint8_t*)malloc(stride * height);
if (rgb == NULL) goto Error;
for (p = 0; p < num_passes; ++p) {
for (y = 0; y < height; ++y) {
png_bytep row = rgb + y * stride;
png_read_rows(png, &row, NULL, 1);
}
}
png_read_end(png, info);
png_destroy_read_struct(&png, &info, NULL);
pic->width = width;
pic->height = height;
ok = has_alpha ? WebPPictureImportRGBA(pic, rgb, stride)
: WebPPictureImportRGB(pic, rgb, stride);
free(rgb);
if (ok && has_alpha && keep_alpha == 2) {
WebPCleanupTransparentArea(pic);
}
End:
return ok;
}
#else
static int ReadPNG(FILE* in_file, WebPPicture* const pic, int keep_alpha) {
(void)in_file;
(void)pic;
(void)keep_alpha;
fprintf(stderr, "PNG support not compiled. Please install the libpng "
"development package before building.\n");
return 0;
}
#endif
typedef enum {
PNG = 0,
JPEG,
UNSUPPORTED
} InputFileFormat;
static InputFileFormat GetImageType(FILE* in_file) {
InputFileFormat format = UNSUPPORTED;
unsigned int magic;
unsigned char buf[4];
if ((fread(&buf[0], 4, 1, in_file) != 1) ||
(fseek(in_file, 0, SEEK_SET) != 0)) {
return format;
}
magic = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
if (magic == 0x89504E47U) {
format = PNG;
} else if (magic >= 0xFFD8FF00U && magic <= 0xFFD8FFFFU) {
format = JPEG;
}
return format;
}
static int ReadPicture(const char* const filename, WebPPicture* const pic,
int keep_alpha) {
int ok = 0;
FILE* in_file = fopen(filename, "rb");
if (in_file == NULL) {
fprintf(stderr, "Error! Cannot open input file '%s'\n", filename);
return ok;
}
if (pic->width == 0 || pic->height == 0) {
// If no size specified, try to decode it as PNG/JPEG (as appropriate).
const InputFileFormat format = GetImageType(in_file);
if (format == PNG) {
ok = ReadPNG(in_file, pic, keep_alpha);
} else if (format == JPEG) {
ok = ReadJPEG(in_file, pic);
}
} else {
// If image size is specified, infer it as YUV format.
ok = ReadYUV(in_file, pic);
}
if (!ok) {
fprintf(stderr, "Error! Could not process file %s\n", filename);
}
fclose(in_file);
return ok;
}
#endif // !HAVE_WINCODEC_H
static void AllocExtraInfo(WebPPicture* const pic) {
const int mb_w = (pic->width + 15) / 16;
const int mb_h = (pic->height + 15) / 16;
pic->extra_info = (uint8_t*)malloc(mb_w * mb_h * sizeof(*pic->extra_info));
}
static void PrintByteCount(const int bytes[4], int total_size,
int* const totals) {
int s;
int total = 0;
for (s = 0; s < 4; ++s) {
fprintf(stderr, "| %7d ", bytes[s]);
total += bytes[s];
if (totals) totals[s] += bytes[s];
}
fprintf(stderr, "| %7d (%.1f%%)\n", total, 100.f * total / total_size);
}
static void PrintPercents(const int counts[4], int total) {
int s;
for (s = 0; s < 4; ++s) {
fprintf(stderr, "| %2d%%", 100 * counts[s] / total);
}
fprintf(stderr, "| %7d\n", total);
}
static void PrintValues(const int values[4]) {
int s;
for (s = 0; s < 4; ++s) {
fprintf(stderr, "| %7d ", values[s]);
}
fprintf(stderr, "|\n");
}
static void PrintExtraInfoLossless(const WebPPicture* const pic,
int short_output,
const char* const file_name) {
const WebPAuxStats* const stats = pic->stats;
if (short_output) {
fprintf(stderr, "%7d %2.2f\n", stats->coded_size, stats->PSNR[3]);
} else {
fprintf(stderr, "File: %s\n", file_name);
fprintf(stderr, "Dimension: %d x %d\n", pic->width, pic->height);
fprintf(stderr, "Output: %d bytes\n", stats->coded_size);
}
}
static void PrintExtraInfoLossy(const WebPPicture* const pic, int short_output,
const char* const file_name) {
const WebPAuxStats* const stats = pic->stats;
if (short_output) {
fprintf(stderr, "%7d %2.2f\n", stats->coded_size, stats->PSNR[3]);
} else {
const int num_i4 = stats->block_count[0];
const int num_i16 = stats->block_count[1];
const int num_skip = stats->block_count[2];
const int total = num_i4 + num_i16;
fprintf(stderr, "File: %s\n", file_name);
fprintf(stderr, "Dimension: %d x %d%s\n",
pic->width, pic->height, (pic->a != NULL) ? " (with alpha)" : "");
fprintf(stderr, "Output: "
"%d bytes Y-U-V-All-PSNR %2.2f %2.2f %2.2f %2.2f dB\n",
stats->coded_size,
stats->PSNR[0], stats->PSNR[1], stats->PSNR[2], stats->PSNR[3]);
if (total > 0) {
int totals[4] = { 0, 0, 0, 0 };
fprintf(stderr, "block count: intra4: %d\n"
" intra16: %d (-> %.2f%%)\n",
num_i4, num_i16, 100.f * num_i16 / total);
fprintf(stderr, " skipped block: %d (%.2f%%)\n",
num_skip, 100.f * num_skip / total);
fprintf(stderr, "bytes used: header: %6d (%.1f%%)\n"
" mode-partition: %6d (%.1f%%)\n",
stats->header_bytes[0],
100.f * stats->header_bytes[0] / stats->coded_size,
stats->header_bytes[1],
100.f * stats->header_bytes[1] / stats->coded_size);
if (stats->alpha_data_size) {
fprintf(stderr, " transparency: %6d\n",
stats->alpha_data_size);
}
if (stats->layer_data_size) {
fprintf(stderr, " enhancement: %6d\n",
stats->layer_data_size);
}
fprintf(stderr, " Residuals bytes "
"|segment 1|segment 2|segment 3"
"|segment 4| total\n");
fprintf(stderr, " intra4-coeffs: ");
PrintByteCount(stats->residual_bytes[0], stats->coded_size, totals);
fprintf(stderr, " intra16-coeffs: ");
PrintByteCount(stats->residual_bytes[1], stats->coded_size, totals);
fprintf(stderr, " chroma coeffs: ");
PrintByteCount(stats->residual_bytes[2], stats->coded_size, totals);
fprintf(stderr, " macroblocks: ");
PrintPercents(stats->segment_size, total);
fprintf(stderr, " quantizer: ");
PrintValues(stats->segment_quant);
fprintf(stderr, " filter level: ");
PrintValues(stats->segment_level);
fprintf(stderr, "------------------+---------");
fprintf(stderr, "+---------+---------+---------+-----------------\n");
fprintf(stderr, " segments total: ");
PrintByteCount(totals, stats->coded_size, NULL);
}
}
if (pic->extra_info) {
const int mb_w = (pic->width + 15) / 16;
const int mb_h = (pic->height + 15) / 16;
const int type = pic->extra_info_type;
int x, y;
for (y = 0; y < mb_h; ++y) {
for (x = 0; x < mb_w; ++x) {
const int c = pic->extra_info[x + y * mb_w];
if (type == 1) { // intra4/intra16
printf("%c", "+."[c]);
} else if (type == 2) { // segments
printf("%c", ".-*X"[c]);
} else if (type == 3) { // quantizers
printf("%.2d ", c);
} else if (type == 6 || type == 7) {
printf("%3d ", c);
} else {
printf("0x%.2x ", c);
}
}
printf("\n");
}
}
}
//------------------------------------------------------------------------------
static int MyWriter(const uint8_t* data, size_t data_size,
const WebPPicture* const pic) {
FILE* const out = (FILE*)pic->custom_ptr;
return data_size ? (fwrite(data, data_size, 1, out) == 1) : 1;
}
// Dumps a picture as a PGM file using the IMC4 layout.
static int DumpPicture(const WebPPicture* const picture, const char* PGM_name) {
int y;
const int uv_width = (picture->width + 1) / 2;
const int uv_height = (picture->height + 1) / 2;
const int stride = (picture->width + 1) & ~1;
const int alpha_height = picture->a ? picture->height : 0;
const int height = picture->height + uv_height + alpha_height;
FILE* const f = fopen(PGM_name, "wb");
if (f == NULL) return 0;
fprintf(f, "P5\n%d %d\n255\n", stride, height);
for (y = 0; y < picture->height; ++y) {
if (fwrite(picture->y + y * picture->y_stride, picture->width, 1, f) != 1)
return 0;
if (picture->width & 1) fputc(0, f); // pad
}
for (y = 0; y < uv_height; ++y) {
if (fwrite(picture->u + y * picture->uv_stride, uv_width, 1, f) != 1)
return 0;
if (fwrite(picture->v + y * picture->uv_stride, uv_width, 1, f) != 1)
return 0;
}
for (y = 0; y < alpha_height; ++y) {
if (fwrite(picture->a + y * picture->a_stride, picture->width, 1, f) != 1)
return 0;
if (picture->width & 1) fputc(0, f); // pad
}
fclose(f);
return 1;
}
//------------------------------------------------------------------------------
static int ProgressReport(int percent, const WebPPicture* const picture) {
printf("[%s]: %3d %% \r",
(char*)picture->stats->user_data, percent);
fflush(stdout);
return 1; // all ok
}
//------------------------------------------------------------------------------
static void HelpShort(void) {
printf("Usage:\n\n");
printf(" cwebp [options] -q quality input.png -o output.webp\n\n");
printf("where quality is between 0 (poor) to 100 (very good).\n");
printf("Typical value is around 80.\n\n");
printf("Try -longhelp for an exhaustive list of advanced options.\n");
}
static void HelpLong(void) {
printf("Usage:\n");
printf(" cwebp [-preset <...>] [options] in_file [-o out_file]\n\n");
printf("If input size (-s) for an image is not specified, "
"it is assumed to be a PNG or JPEG file.\n");
#ifdef HAVE_WINCODEC_H
printf("Windows builds can take as input any of the files handled by WIC\n");
#endif
printf("options:\n");
printf(" -h / -help ............ short help\n");
printf(" -H / -longhelp ........ long help\n");
printf(" -q <float> ............. quality factor (0:small..100:big)\n");
printf(" -alpha_q <int> ......... Transparency-compression quality "
"(0..100).\n");
printf(" -preset <string> ....... Preset setting, one of:\n");
printf(" default, photo, picture,\n");
printf(" drawing, icon, text\n");
printf(" -preset must come first, as it overwrites other parameters.");
printf("\n");
printf(" -m <int> ............... compression method (0=fast, 6=slowest)\n");
printf(" -segments <int> ........ number of segments to use (1..4)\n");
printf(" -size <int> ............ Target size (in bytes)\n");
printf(" -psnr <float> .......... Target PSNR (in dB. typically: 42)\n");
printf("\n");
printf(" -s <int> <int> ......... Input size (width x height) for YUV\n");
printf(" -sns <int> ............. Spatial Noise Shaping (0:off, 100:max)\n");
printf(" -f <int> ............... filter strength (0=off..100)\n");
printf(" -sharpness <int> ....... "
"filter sharpness (0:most .. 7:least sharp)\n");
printf(" -strong ................ use strong filter instead of simple.\n");
printf(" -partition_limit <int> . limit quality to fit the 512k limit on\n");
printf(" "
"the first partition (0=no degradation ... 100=full)\n");
printf(" -pass <int> ............ analysis pass number (1..10)\n");
printf(" -crop <x> <y> <w> <h> .. crop picture with the given rectangle\n");
printf(" -resize <w> <h> ........ resize picture (after any cropping)\n");
#ifdef WEBP_EXPERIMENTAL_FEATURES
printf(" -444 / -422 / -gray ..... Change colorspace\n");
#endif
printf(" -map <int> ............. print map of extra info.\n");
printf(" -print_ssim ............ prints averaged SSIM distortion.\n");
printf(" -print_psnr ............ prints averaged PSNR distortion.\n");
printf(" -d <file.pgm> .......... dump the compressed output (PGM file).\n");
printf(" -alpha_method <int> .... Transparency-compression method (0..1)\n");
printf(" -alpha_filter <string> . predictive filtering for alpha plane.\n");
printf(" One of: none, fast (default) or best.\n");
printf(" -alpha_cleanup ......... Clean RGB values in transparent area.\n");
printf(" -noalpha ............... discard any transparency information.\n");
printf("\n");
printf(" -short ................. condense printed message\n");
printf(" -quiet ................. don't print anything.\n");
printf(" -version ............... print version number and exit.\n");
#ifndef WEBP_DLL
printf(" -noasm ................. disable all assembly optimizations.\n");
#endif
printf(" -v ..................... verbose, e.g. print encoding/decoding "
"times\n");
printf(" -progress .............. report encoding progress\n");
printf("\n");
printf("Experimental Options:\n");
printf(" -af .................... auto-adjust filter strength.\n");
printf(" -pre <int> ............. pre-processing filter\n");
printf("\n");
}
//------------------------------------------------------------------------------
// Error messages
static const char* const kErrorMessages[] = {
"OK",
"OUT_OF_MEMORY: Out of memory allocating objects",
"BITSTREAM_OUT_OF_MEMORY: Out of memory re-allocating byte buffer",
"NULL_PARAMETER: NULL parameter passed to function",
"INVALID_CONFIGURATION: configuration is invalid",
"BAD_DIMENSION: Bad picture dimension. Maximum width and height "
"allowed is 16383 pixels.",
"PARTITION0_OVERFLOW: Partition #0 is too big to fit 512k.\n"
"To reduce the size of this partition, try using less segments "
"with the -segments option, and eventually reduce the number of "
"header bits using -partition_limit. More details are available "
"in the manual (`man cwebp`)",
"PARTITION_OVERFLOW: Partition is too big to fit 16M",
"BAD_WRITE: Picture writer returned an I/O error",
"FILE_TOO_BIG: File would be too big to fit in 4G",
"USER_ABORT: encoding abort requested by user"
};
//------------------------------------------------------------------------------
int main(int argc, const char *argv[]) {
int return_value = -1;
const char *in_file = NULL, *out_file = NULL, *dump_file = NULL;
FILE *out = NULL;
int c;
int short_output = 0;
int quiet = 0;
int keep_alpha = 1;
int crop = 0, crop_x = 0, crop_y = 0, crop_w = 0, crop_h = 0;
int resize_w = 0, resize_h = 0;
int show_progress = 0;
WebPPicture picture;
int print_distortion = 0; // 1=PSNR, 2=SSIM
WebPPicture original_picture; // when PSNR or SSIM is requested
WebPConfig config;
WebPAuxStats stats;
Stopwatch stop_watch;
if (!WebPPictureInit(&picture) ||
!WebPPictureInit(&original_picture) ||
!WebPConfigInit(&config)) {
fprintf(stderr, "Error! Version mismatch!\n");
goto Error;
}
if (argc == 1) {
HelpShort();
return 0;
}
for (c = 1; c < argc; ++c) {
if (!strcmp(argv[c], "-h") || !strcmp(argv[c], "-help")) {
HelpShort();
return 0;
} else if (!strcmp(argv[c], "-H") || !strcmp(argv[c], "-longhelp")) {
HelpLong();
return 0;
} else if (!strcmp(argv[c], "-o") && c < argc - 1) {
out_file = argv[++c];
} else if (!strcmp(argv[c], "-d") && c < argc - 1) {
dump_file = argv[++c];
config.show_compressed = 1;
} else if (!strcmp(argv[c], "-print_ssim")) {
config.show_compressed = 1;
print_distortion = 2;
} else if (!strcmp(argv[c], "-print_psnr")) {
config.show_compressed = 1;
print_distortion = 1;
} else if (!strcmp(argv[c], "-short")) {
short_output++;
} else if (!strcmp(argv[c], "-s") && c < argc - 2) {
picture.width = strtol(argv[++c], NULL, 0);
picture.height = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-m") && c < argc - 1) {
config.method = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-q") && c < argc - 1) {
config.quality = (float)strtod(argv[++c], NULL);
} else if (!strcmp(argv[c], "-alpha_q") && c < argc - 1) {
config.alpha_quality = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-alpha_method") && c < argc - 1) {
config.alpha_compression = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-alpha_cleanup")) {
keep_alpha = keep_alpha ? 2 : 0;
} else if (!strcmp(argv[c], "-alpha_filter") && c < argc - 1) {
++c;
if (!strcmp(argv[c], "none")) {
config.alpha_filtering = 0;
} else if (!strcmp(argv[c], "fast")) {
config.alpha_filtering = 1;
} else if (!strcmp(argv[c], "best")) {
config.alpha_filtering = 2;
} else {
fprintf(stderr, "Error! Unrecognized alpha filter: %s\n", argv[c]);
goto Error;
}
} else if (!strcmp(argv[c], "-noalpha")) {
keep_alpha = 0;
#ifdef USE_LOSSLESS_ENCODER
} else if (!strcmp(argv[c], "-lossless")) {
config.lossless = 1;
picture.use_argb_input = 1;
#endif
} else if (!strcmp(argv[c], "-size") && c < argc - 1) {
config.target_size = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-psnr") && c < argc - 1) {
config.target_PSNR = (float)strtod(argv[++c], NULL);
} else if (!strcmp(argv[c], "-sns") && c < argc - 1) {
config.sns_strength = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-f") && c < argc - 1) {
config.filter_strength = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-af")) {
config.autofilter = 1;
} else if (!strcmp(argv[c], "-strong")) {
config.filter_type = 1;
} else if (!strcmp(argv[c], "-sharpness") && c < argc - 1) {
config.filter_sharpness = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-pass") && c < argc - 1) {
config.pass = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-pre") && c < argc - 1) {
config.preprocessing = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-segments") && c < argc - 1) {
config.segments = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-partition_limit") && c < argc - 1) {
config.partition_limit = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-map") && c < argc - 1) {
picture.extra_info_type = strtol(argv[++c], NULL, 0);
#ifdef WEBP_EXPERIMENTAL_FEATURES
} else if (!strcmp(argv[c], "-444")) {
picture.colorspace = WEBP_YUV444;
} else if (!strcmp(argv[c], "-422")) {
picture.colorspace = WEBP_YUV422;
} else if (!strcmp(argv[c], "-gray")) {
picture.colorspace = WEBP_YUV400;
#endif
} else if (!strcmp(argv[c], "-crop") && c < argc - 4) {
crop = 1;
crop_x = strtol(argv[++c], NULL, 0);
crop_y = strtol(argv[++c], NULL, 0);
crop_w = strtol(argv[++c], NULL, 0);
crop_h = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-resize") && c < argc - 2) {
resize_w = strtol(argv[++c], NULL, 0);
resize_h = strtol(argv[++c], NULL, 0);
#ifndef WEBP_DLL
} else if (!strcmp(argv[c], "-noasm")) {
VP8GetCPUInfo = NULL;
#endif
} else if (!strcmp(argv[c], "-version")) {
const int version = WebPGetEncoderVersion();
printf("%d.%d.%d\n",
(version >> 16) & 0xff, (version >> 8) & 0xff, version & 0xff);
return 0;
} else if (!strcmp(argv[c], "-progress")) {
show_progress = 1;
} else if (!strcmp(argv[c], "-quiet")) {
quiet = 1;
} else if (!strcmp(argv[c], "-preset") && c < argc - 1) {
WebPPreset preset;
++c;
if (!strcmp(argv[c], "default")) {
preset = WEBP_PRESET_DEFAULT;
} else if (!strcmp(argv[c], "photo")) {
preset = WEBP_PRESET_PHOTO;
} else if (!strcmp(argv[c], "picture")) {
preset = WEBP_PRESET_PICTURE;
} else if (!strcmp(argv[c], "drawing")) {
preset = WEBP_PRESET_DRAWING;
} else if (!strcmp(argv[c], "icon")) {
preset = WEBP_PRESET_ICON;
} else if (!strcmp(argv[c], "text")) {
preset = WEBP_PRESET_TEXT;
} else {
fprintf(stderr, "Error! Unrecognized preset: %s\n", argv[c]);
goto Error;
}
if (!WebPConfigPreset(&config, preset, config.quality)) {
fprintf(stderr, "Error! Could initialize configuration with preset.\n");
goto Error;
}
} else if (!strcmp(argv[c], "-v")) {
verbose = 1;
} else if (argv[c][0] == '-') {
fprintf(stderr, "Error! Unknown option '%s'\n", argv[c]);
HelpLong();
return -1;
} else {
in_file = argv[c];
}
}
if (in_file == NULL) {
fprintf(stderr, "No input file specified!\n");
HelpShort();
goto Error;
}
if (!WebPValidateConfig(&config)) {
fprintf(stderr, "Error! Invalid configuration.\n");
goto Error;
}
// Read the input
if (verbose) {
StopwatchReadAndReset(&stop_watch);
}
if (!ReadPicture(in_file, &picture, keep_alpha)) {
fprintf(stderr, "Error! Cannot read input picture file '%s'\n", in_file);
goto Error;
}
picture.progress_hook = (show_progress && !quiet) ? ProgressReport : NULL;
if (verbose) {
const double time = StopwatchReadAndReset(&stop_watch);
fprintf(stderr, "Time to read input: %.3fs\n", time);
}
// Open the output
if (out_file) {
out = fopen(out_file, "wb");
if (out == NULL) {
fprintf(stderr, "Error! Cannot open output file '%s'\n", out_file);
goto Error;
} else {
if (!short_output && !quiet) {
fprintf(stderr, "Saving file '%s'\n", out_file);
}
}
picture.writer = MyWriter;
picture.custom_ptr = (void*)out;
} else {
out = NULL;
if (!quiet && !short_output) {
fprintf(stderr, "No output file specified (no -o flag). Encoding will\n");
fprintf(stderr, "be performed, but its results discarded.\n\n");
}
}
picture.stats = &stats;
stats.user_data = (void*)in_file;
// Compress
if (verbose) {
StopwatchReadAndReset(&stop_watch);
}
if (crop != 0 && !WebPPictureCrop(&picture, crop_x, crop_y, crop_w, crop_h)) {
fprintf(stderr, "Error! Cannot crop picture\n");
goto Error;
}
if ((resize_w | resize_h) > 0) {
if (!WebPPictureRescale(&picture, resize_w, resize_h)) {
fprintf(stderr, "Error! Cannot resize picture\n");
goto Error;
}
}
if (picture.extra_info_type > 0) {
AllocExtraInfo(&picture);
}
if (print_distortion > 0) { // Save original picture for later comparison
WebPPictureCopy(&picture, &original_picture);
}
if (!WebPEncode(&config, &picture)) {
fprintf(stderr, "Error! Cannot encode picture as WebP\n");
fprintf(stderr, "Error code: %d (%s)\n",
picture.error_code, kErrorMessages[picture.error_code]);
goto Error;
}
if (verbose) {
const double time = StopwatchReadAndReset(&stop_watch);
fprintf(stderr, "Time to encode picture: %.3fs\n", time);
}
// Write info
if (dump_file) {
DumpPicture(&picture, dump_file);
}
if (!quiet) {
if (config.lossless) {
PrintExtraInfoLossless(&picture, short_output, in_file);
} else {
PrintExtraInfoLossy(&picture, short_output, in_file);
}
}
if (!quiet && !short_output && print_distortion > 0) { // print distortion
float values[5];
WebPPictureDistortion(&picture, &original_picture,
(print_distortion == 1) ? 0 : 1, values);
fprintf(stderr, "%s: Y:%.2f U:%.2f V:%.2f A:%.2f Total:%.2f\n",
(print_distortion == 1) ? "PSNR" : "SSIM",
values[0], values[1], values[2], values[3], values[4]);
}
return_value = 0;
Error:
free(picture.extra_info);
WebPPictureFree(&picture);
WebPPictureFree(&original_picture);
if (out != NULL) {
fclose(out);
}
return return_value;
}
//------------------------------------------------------------------------------
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