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chromium / webm / libwebp / c2e3fd30c41528a1113e455964d6d1287335157b / . / examples / cwebp.c
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// Copyright 2011 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// simple command line calling the WebPEncode function.
// Encodes a raw .YUV into WebP bitstream
//
// Author: Skal (pascal.massimino@gmail.com)
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_CONFIG_H
#include "webp/config.h"
#endif
#include "../examples/example_util.h"
#include "../imageio/image_dec.h"
#include "../imageio/imageio_util.h"
#include "../imageio/webpdec.h"
#include "./stopwatch.h"
#include "./unicode.h"
#include "webp/encode.h"
#ifndef WEBP_DLL
#ifdef __cplusplus
extern "C" {
#endif
extern void* VP8GetCPUInfo; // opaque forward declaration.
#ifdef __cplusplus
} // extern "C"
#endif
#endif // WEBP_DLL
//------------------------------------------------------------------------------
static int verbose = 0;
static int ReadYUV(const uint8_t* const data, size_t data_size,
WebPPicture* const pic) {
const int use_argb = pic->use_argb;
const int uv_width = (pic->width + 1) / 2;
const int uv_height = (pic->height + 1) / 2;
const int y_plane_size = pic->width * pic->height;
const int uv_plane_size = uv_width * uv_height;
const size_t expected_data_size = y_plane_size + 2 * uv_plane_size;
if (data_size != expected_data_size) {
fprintf(stderr,
"input data doesn't have the expected size (%d instead of %d)\n",
(int)data_size, (int)expected_data_size);
return 0;
}
pic->use_argb = 0;
if (!WebPPictureAlloc(pic)) return 0;
ImgIoUtilCopyPlane(data, pic->width, pic->y, pic->y_stride,
pic->width, pic->height);
ImgIoUtilCopyPlane(data + y_plane_size, uv_width,
pic->u, pic->uv_stride, uv_width, uv_height);
ImgIoUtilCopyPlane(data + y_plane_size + uv_plane_size, uv_width,
pic->v, pic->uv_stride, uv_width, uv_height);
return use_argb ? WebPPictureYUVAToARGB(pic) : 1;
}
#ifdef HAVE_WINCODEC_H
static int ReadPicture(const char* const filename, WebPPicture* const pic,
int keep_alpha, Metadata* const metadata) {
int ok = 0;
const uint8_t* data = NULL;
size_t data_size = 0;
if (pic->width != 0 && pic->height != 0) {
ok = ImgIoUtilReadFile(filename, &data, &data_size);
ok = ok && ReadYUV(data, data_size, pic);
} else {
// If no size specified, try to decode it using WIC.
ok = ReadPictureWithWIC(filename, pic, keep_alpha, metadata);
if (!ok) {
ok = ImgIoUtilReadFile(filename, &data, &data_size);
ok = ok && ReadWebP(data, data_size, pic, keep_alpha, metadata);
}
}
if (!ok) {
WFPRINTF(stderr, "Error! Could not process file %s\n",
(const W_CHAR*)filename);
}
WebPFree((void*)data);
return ok;
}
#else // !HAVE_WINCODEC_H
static int ReadPicture(const char* const filename, WebPPicture* const pic,
int keep_alpha, Metadata* const metadata) {
const uint8_t* data = NULL;
size_t data_size = 0;
int ok = 0;
ok = ImgIoUtilReadFile(filename, &data, &data_size);
if (!ok) goto End;
if (pic->width == 0 || pic->height == 0) {
WebPImageReader reader = WebPGuessImageReader(data, data_size);
ok = reader(data, data_size, pic, keep_alpha, metadata);
} else {
// If image size is specified, infer it as YUV format.
ok = ReadYUV(data, data_size, pic);
}
End:
if (!ok) {
WFPRINTF(stderr, "Error! Could not process file %s\n",
(const W_CHAR*)filename);
}
WebPFree((void*)data);
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*)WebPMalloc(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 s;
const int total = counts[0] + counts[1] + counts[2] + counts[3];
for (s = 0; s < 4; ++s) {
fprintf(stderr, "| %3d%%", (int)(100. * counts[s] / total + .5));
}
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 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");
if (stats->lossless_features & 2) fprintf(stderr, " CROSS-COLOR-TRANSFORM");
if (stats->lossless_features & 4) fprintf(stderr, " SUBTRACT-GREEN");
if (stats->lossless_features & 8) fprintf(stderr, " PALETTE");
fprintf(stderr, "\n");
}
fprintf(stderr, " * Precision Bits: histogram=%d transform=%d cache=%d\n",
stats->histogram_bits, stats->transform_bits, stats->cache_bits);
if (stats->palette_size > 0) {
fprintf(stderr, " * Palette size: %d\n", stats->palette_size);
}
}
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 {
WFPRINTF(stderr, "File: %s\n", (const W_CHAR*)file_name);
fprintf(stderr, "Dimension: %d x %d\n", pic->width, pic->height);
fprintf(stderr, "Output: %d bytes (%.2f bpp)\n", stats->coded_size,
8.f * stats->coded_size / pic->width / pic->height);
PrintFullLosslessInfo(stats, "ARGB");
}
}
static void PrintExtraInfoLossy(const WebPPicture* const pic, int short_output,
int full_details,
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;
WFPRINTF(stderr, "File: %s\n", (const W_CHAR*)file_name);
fprintf(stderr, "Dimension: %d x %d%s\n",
pic->width, pic->height,
stats->alpha_data_size ? " (with alpha)" : "");
fprintf(stderr, "Output: "
"%d bytes Y-U-V-All-PSNR %2.2f %2.2f %2.2f %2.2f dB\n"
" (%.2f bpp)\n",
stats->coded_size,
stats->PSNR[0], stats->PSNR[1], stats->PSNR[2], stats->PSNR[3],
8.f * stats->coded_size / pic->width / pic->height);
if (total > 0) {
int totals[4] = { 0, 0, 0, 0 };
fprintf(stderr, "block count: intra4: %6d (%.2f%%)\n"
" intra16: %6d (%.2f%%)\n"
" skipped: %6d (%.2f%%)\n",
num_i4, 100.f * num_i4 / total,
num_i16, 100.f * num_i16 / total,
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 > 0) {
fprintf(stderr, " transparency: %6d (%.1f dB)\n",
stats->alpha_data_size, stats->PSNR[4]);
}
fprintf(stderr, " Residuals bytes "
"|segment 1|segment 2|segment 3"
"|segment 4| total\n");
if (full_details) {
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);
fprintf(stderr, " quantizer: ");
PrintValues(stats->segment_quant);
fprintf(stderr, " filter level: ");
PrintValues(stats->segment_level);
if (full_details) {
fprintf(stderr, "------------------+---------");
fprintf(stderr, "+---------+---------+---------+-----------------\n");
fprintf(stderr, " segments total: ");
PrintByteCount(totals, stats->coded_size, NULL);
}
}
if (stats->lossless_size > 0) {
PrintFullLosslessInfo(stats, "alpha");
}
}
}
static void PrintMapInfo(const WebPPicture* const pic) {
if (pic->extra_info != NULL) {
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
fprintf(stderr, "%c", "+."[c]);
} else if (type == 2) { // segments
fprintf(stderr, "%c", ".-*X"[c]);
} else if (type == 3) { // quantizers
fprintf(stderr, "%.2d ", c);
} else if (type == 6 || type == 7) {
fprintf(stderr, "%3d ", c);
} else {
fprintf(stderr, "0x%.2x ", c);
}
}
fprintf(stderr, "\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 uint8_t* src_y = picture->y;
const uint8_t* src_u = picture->u;
const uint8_t* src_v = picture->v;
const uint8_t* src_a = picture->a;
const int alpha_height =
WebPPictureHasTransparency(picture) ? picture->height : 0;
const int height = picture->height + uv_height + alpha_height;
FILE* const f = WFOPEN(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(src_y, picture->width, 1, f) != 1) return 0;
if (picture->width & 1) fputc(0, f); // pad
src_y += picture->y_stride;
}
for (y = 0; y < uv_height; ++y) {
if (fwrite(src_u, uv_width, 1, f) != 1) return 0;
if (fwrite(src_v, uv_width, 1, f) != 1) return 0;
src_u += picture->uv_stride;
src_v += picture->uv_stride;
}
for (y = 0; y < alpha_height; ++y) {
if (fwrite(src_a, picture->width, 1, f) != 1) return 0;
if (picture->width & 1) fputc(0, f); // pad
src_a += picture->a_stride;
}
fclose(f);
return 1;
}
// -----------------------------------------------------------------------------
// Metadata writing.
enum {
METADATA_EXIF = (1 << 0),
METADATA_ICC = (1 << 1),
METADATA_XMP = (1 << 2),
METADATA_ALL = METADATA_EXIF | METADATA_ICC | METADATA_XMP
};
static const int kChunkHeaderSize = 8;
static const int kTagSize = 4;
static void PrintMetadataInfo(const Metadata* const metadata,
int metadata_written) {
if (metadata == NULL || metadata_written == 0) return;
fprintf(stderr, "Metadata:\n");
if (metadata_written & METADATA_ICC) {
fprintf(stderr, " * ICC profile: %6d bytes\n", (int)metadata->iccp.size);
}
if (metadata_written & METADATA_EXIF) {
fprintf(stderr, " * EXIF data: %6d bytes\n", (int)metadata->exif.size);
}
if (metadata_written & METADATA_XMP) {
fprintf(stderr, " * XMP data: %6d bytes\n", (int)metadata->xmp.size);
}
}
// Outputs, in little endian, 'num' bytes from 'val' to 'out'.
static int WriteLE(FILE* const out, uint32_t val, int num) {
uint8_t buf[4];
int i;
for (i = 0; i < num; ++i) {
buf[i] = (uint8_t)(val & 0xff);
val >>= 8;
}
return (fwrite(buf, num, 1, out) == 1);
}
static int WriteLE24(FILE* const out, uint32_t val) {
return WriteLE(out, val, 3);
}
static int WriteLE32(FILE* const out, uint32_t val) {
return WriteLE(out, val, 4);
}
static int WriteMetadataChunk(FILE* const out, const char fourcc[4],
const MetadataPayload* const payload) {
const uint8_t zero = 0;
const size_t need_padding = payload->size & 1;
int ok = (fwrite(fourcc, kTagSize, 1, out) == 1);
ok = ok && WriteLE32(out, (uint32_t)payload->size);
ok = ok && (fwrite(payload->bytes, payload->size, 1, out) == 1);
return ok && (fwrite(&zero, need_padding, need_padding, out) == need_padding);
}
// Sets 'flag' in 'vp8x_flags' and updates 'metadata_size' with the size of the
// chunk if there is metadata and 'keep' is true.
static int UpdateFlagsAndSize(const MetadataPayload* const payload,
int keep, int flag,
uint32_t* vp8x_flags, uint64_t* metadata_size) {
if (keep && payload->bytes != NULL && payload->size > 0) {
*vp8x_flags |= flag;
*metadata_size += kChunkHeaderSize + payload->size + (payload->size & 1);
return 1;
}
return 0;
}
// Writes a WebP file using the image contained in 'memory_writer' and the
// metadata from 'metadata'. Metadata is controlled by 'keep_metadata' and the
// availability in 'metadata'. Returns true on success.
// For details see doc/webp-container-spec.txt#extended-file-format.
static int WriteWebPWithMetadata(FILE* const out,
const WebPPicture* const picture,
const WebPMemoryWriter* const memory_writer,
const Metadata* const metadata,
int keep_metadata,
int* const metadata_written) {
const char kVP8XHeader[] = "VP8X\x0a\x00\x00\x00";
const int kAlphaFlag = 0x10;
const int kEXIFFlag = 0x08;
const int kICCPFlag = 0x20;
const int kXMPFlag = 0x04;
const size_t kRiffHeaderSize = 12;
const size_t kMaxChunkPayload = ~0 - kChunkHeaderSize - 1;
const size_t kMinSize = kRiffHeaderSize + kChunkHeaderSize;
uint32_t flags = 0;
uint64_t metadata_size = 0;
const int write_exif = UpdateFlagsAndSize(&metadata->exif,
!!(keep_metadata & METADATA_EXIF),
kEXIFFlag, &flags, &metadata_size);
const int write_iccp = UpdateFlagsAndSize(&metadata->iccp,
!!(keep_metadata & METADATA_ICC),
kICCPFlag, &flags, &metadata_size);
const int write_xmp = UpdateFlagsAndSize(&metadata->xmp,
!!(keep_metadata & METADATA_XMP),
kXMPFlag, &flags, &metadata_size);
uint8_t* webp = memory_writer->mem;
size_t webp_size = memory_writer->size;
*metadata_written = 0;
if (webp_size < kMinSize) return 0;
if (webp_size - kChunkHeaderSize + metadata_size > kMaxChunkPayload) {
fprintf(stderr, "Error! Addition of metadata would exceed "
"container size limit.\n");
return 0;
}
if (metadata_size > 0) {
const int kVP8XChunkSize = 18;
const int has_vp8x = !memcmp(webp + kRiffHeaderSize, "VP8X", kTagSize);
const uint32_t riff_size = (uint32_t)(webp_size - kChunkHeaderSize +
(has_vp8x ? 0 : kVP8XChunkSize) +
metadata_size);
// RIFF
int ok = (fwrite(webp, kTagSize, 1, out) == 1);
// RIFF size (file header size is not recorded)
ok = ok && WriteLE32(out, riff_size);
webp += kChunkHeaderSize;
webp_size -= kChunkHeaderSize;
// WEBP
ok = ok && (fwrite(webp, kTagSize, 1, out) == 1);
webp += kTagSize;
webp_size -= kTagSize;
if (has_vp8x) { // update the existing VP8X flags
webp[kChunkHeaderSize] |= (uint8_t)(flags & 0xff);
ok = ok && (fwrite(webp, kVP8XChunkSize, 1, out) == 1);
webp += kVP8XChunkSize;
webp_size -= kVP8XChunkSize;
} else {
const int is_lossless = !memcmp(webp, "VP8L", kTagSize);
if (is_lossless) {
// Presence of alpha is stored in the 37th bit (29th after the
// signature) of VP8L data.
if (webp[kChunkHeaderSize + 4] & (1 << 4)) flags |= kAlphaFlag;
}
ok = ok && (fwrite(kVP8XHeader, kChunkHeaderSize, 1, out) == 1);
ok = ok && WriteLE32(out, flags);
ok = ok && WriteLE24(out, picture->width - 1);
ok = ok && WriteLE24(out, picture->height - 1);
}
if (write_iccp) {
ok = ok && WriteMetadataChunk(out, "ICCP", &metadata->iccp);
*metadata_written |= METADATA_ICC;
}
// Image
ok = ok && (fwrite(webp, webp_size, 1, out) == 1);
if (write_exif) {
ok = ok && WriteMetadataChunk(out, "EXIF", &metadata->exif);
*metadata_written |= METADATA_EXIF;
}
if (write_xmp) {
ok = ok && WriteMetadataChunk(out, "XMP ", &metadata->xmp);
*metadata_written |= METADATA_XMP;
}
return ok;
}
// No metadata, just write the original image file.
return (fwrite(webp, webp_size, 1, out) == 1);
}
//------------------------------------------------------------------------------
static int ProgressReport(int percent, const WebPPicture* const picture) {
fprintf(stderr, "[%s]: %3d %% \r",
(char*)picture->user_data, percent);
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\n"
"assumed to be a PNG, JPEG, TIFF or WebP file.\n");
printf("Note: Animated PNG and WebP files are not supported.\n");
#ifdef HAVE_WINCODEC_H
printf("Windows builds can take as input any of the files handled by WIC.\n");
#endif
printf("\nOptions:\n");
printf(" -h / -help ............. short help\n");
printf(" -H / -longhelp ......... long help\n");
printf(" -q <float> ............. quality factor (0:small..100:big), "
"default=75\n");
printf(" -alpha_q <int> ......... transparency-compression quality (0..100),"
"\n default=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\n");
printf(" -z <int> ............... activates lossless preset with given\n"
" level in [0:fast, ..., 9:slowest]\n");
printf("\n");
printf(" -m <int> ............... compression method (0=fast, 6=slowest), "
"default=4\n");
printf(" -segments <int> ........ number of segments to use (1..4), "
"default=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), "
"default=50\n");
printf(" -f <int> ............... filter strength (0=off..100), "
"default=60\n");
printf(" -sharpness <int> ....... "
"filter sharpness (0:most .. 7:least sharp), default=0\n");
printf(" -strong ................ use strong filter instead "
"of simple (default)\n");
printf(" -nostrong .............. use simple filter instead of strong\n");
printf(" -sharp_yuv ............. use sharper (and slower) RGB->YUV "
"conversion\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(" -qrange <min> <max> .... specifies the permissible quality range\n"
" (default: 0 100)\n");
printf(" -crop <x> <y> <w> <h> .. crop picture with the given rectangle\n");
printf(" -resize <w> <h> ........ resize picture (*after* any cropping)\n");
printf(" -mt .................... use multi-threading if available\n");
printf(" -low_memory ............ reduce memory usage (slower encoding)\n");
printf(" -map <int> ............. print map of extra info\n");
printf(" -print_psnr ............ prints averaged PSNR distortion\n");
printf(" -print_ssim ............ prints averaged SSIM distortion\n");
printf(" -print_lsim ............ prints local-similarity distortion\n");
printf(" -d <file.pgm> .......... dump the compressed output (PGM file)\n");
printf(" -alpha_method <int> .... transparency-compression method (0..1), "
"default=1\n");
printf(" -alpha_filter <string> . predictive filtering for alpha plane,\n");
printf(" one of: none, fast (default) or best\n");
printf(" -exact ................. preserve RGB values in transparent area, "
"default=off\n");
printf(" -blend_alpha <hex> ..... blend colors against background color\n"
" expressed as RGB values written in\n"
" hexadecimal, e.g. 0xc0e0d0 for red=0xc0\n"
" green=0xe0 and blue=0xd0\n");
printf(" -noalpha ............... discard any transparency information\n");
printf(" -lossless .............. encode image losslessly, default=off\n");
printf(" -near_lossless <int> ... use near-lossless image\n"
" preprocessing (0..100=off), "
"default=100\n");
printf(" -hint <string> ......... specify image characteristics hint,\n");
printf(" one of: photo, picture or graph\n");
printf("\n");
printf(" -metadata <string> ..... comma separated list of metadata to\n");
printf(" ");
printf("copy from the input to the output if present.\n");
printf(" "
"Valid values: all, none (default), exif, icc, xmp\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(" -jpeg_like ............. roughly match expected JPEG size\n");
printf(" -af .................... auto-adjust filter strength\n");
printf(" -pre <int> ............. pre-processing filter\n");
printf("\n");
printf("Supported input formats:\n %s\n", WebPGetEnabledInputFileFormats());
}
//------------------------------------------------------------------------------
// Error messages
static const char* const kErrorMessages[VP8_ENC_ERROR_LAST] = {
"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 blend_alpha = 0;
uint32_t background_color = 0xffffffu;
int crop = 0, crop_x = 0, crop_y = 0, crop_w = 0, crop_h = 0;
int resize_w = 0, resize_h = 0;
int lossless_preset = 6;
int use_lossless_preset = -1; // -1=unset, 0=don't use, 1=use it
int show_progress = 0;
int keep_metadata = 0;
int metadata_written = 0;
WebPPicture picture;
int print_distortion = -1; // -1=off, 0=PSNR, 1=SSIM, 2=LSIM
WebPPicture original_picture; // when PSNR or SSIM is requested
WebPConfig config;
WebPAuxStats stats;
WebPMemoryWriter memory_writer;
int use_memory_writer;
Metadata metadata;
Stopwatch stop_watch;
INIT_WARGV(argc, argv);
MetadataInit(&metadata);
WebPMemoryWriterInit(&memory_writer);
if (!WebPPictureInit(&picture) ||
!WebPPictureInit(&original_picture) ||
!WebPConfigInit(&config)) {
fprintf(stderr, "Error! Version mismatch!\n");
FREE_WARGV_AND_RETURN(-1);
}
if (argc == 1) {
HelpShort();
FREE_WARGV_AND_RETURN(0);
}
for (c = 1; c < argc; ++c) {
int parse_error = 0;
if (!strcmp(argv[c], "-h") || !strcmp(argv[c], "-help")) {
HelpShort();
FREE_WARGV_AND_RETURN(0);
} else if (!strcmp(argv[c], "-H") || !strcmp(argv[c], "-longhelp")) {
HelpLong();
FREE_WARGV_AND_RETURN(0);
} else if (!strcmp(argv[c], "-o") && c + 1 < argc) {
out_file = (const char*)GET_WARGV(argv, ++c);
} else if (!strcmp(argv[c], "-d") && c + 1 < argc) {
dump_file = (const char*)GET_WARGV(argv, ++c);
config.show_compressed = 1;
} else if (!strcmp(argv[c], "-print_psnr")) {
config.show_compressed = 1;
print_distortion = 0;
} else if (!strcmp(argv[c], "-print_ssim")) {
config.show_compressed = 1;
print_distortion = 1;
} else if (!strcmp(argv[c], "-print_lsim")) {
config.show_compressed = 1;
print_distortion = 2;
} else if (!strcmp(argv[c], "-short")) {
++short_output;
} else if (!strcmp(argv[c], "-s") && c + 2 < argc) {
picture.width = ExUtilGetInt(argv[++c], 0, &parse_error);
picture.height = ExUtilGetInt(argv[++c], 0, &parse_error);
if (picture.width > WEBP_MAX_DIMENSION || picture.width < 0 ||
picture.height > WEBP_MAX_DIMENSION || picture.height < 0) {
fprintf(stderr,
"Specified dimension (%d x %d) is out of range.\n",
picture.width, picture.height);
goto Error;
}
} else if (!strcmp(argv[c], "-m") && c + 1 < argc) {
config.method = ExUtilGetInt(argv[++c], 0, &parse_error);
use_lossless_preset = 0; // disable -z option
} else if (!strcmp(argv[c], "-q") && c + 1 < argc) {
config.quality = ExUtilGetFloat(argv[++c], &parse_error);
use_lossless_preset = 0; // disable -z option
} else if (!strcmp(argv[c], "-z") && c + 1 < argc) {
lossless_preset = ExUtilGetInt(argv[++c], 0, &parse_error);
if (use_lossless_preset != 0) use_lossless_preset = 1;
} else if (!strcmp(argv[c], "-alpha_q") && c + 1 < argc) {
config.alpha_quality = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-alpha_method") && c + 1 < argc) {
config.alpha_compression = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-alpha_cleanup")) {
// This flag is obsolete, does opposite of -exact.
config.exact = 0;
} else if (!strcmp(argv[c], "-exact")) {
config.exact = 1;
} else if (!strcmp(argv[c], "-blend_alpha") && c + 1 < argc) {
blend_alpha = 1;
// background color is given in hex with an optional '0x' prefix
background_color = ExUtilGetInt(argv[++c], 16, &parse_error);
background_color = background_color & 0x00ffffffu;
} else if (!strcmp(argv[c], "-alpha_filter") && c + 1 < argc) {
++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;
} else if (!strcmp(argv[c], "-lossless")) {
config.lossless = 1;
} else if (!strcmp(argv[c], "-near_lossless") && c + 1 < argc) {
config.near_lossless = ExUtilGetInt(argv[++c], 0, &parse_error);
config.lossless = 1; // use near-lossless only with lossless
} else if (!strcmp(argv[c], "-hint") && c + 1 < argc) {
++c;
if (!strcmp(argv[c], "photo")) {
config.image_hint = WEBP_HINT_PHOTO;
} else if (!strcmp(argv[c], "picture")) {
config.image_hint = WEBP_HINT_PICTURE;
} else if (!strcmp(argv[c], "graph")) {
config.image_hint = WEBP_HINT_GRAPH;
} else {
fprintf(stderr, "Error! Unrecognized image hint: %s\n", argv[c]);
goto Error;
}
} else if (!strcmp(argv[c], "-size") && c + 1 < argc) {
config.target_size = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-psnr") && c + 1 < argc) {
config.target_PSNR = ExUtilGetFloat(argv[++c], &parse_error);
} else if (!strcmp(argv[c], "-sns") && c + 1 < argc) {
config.sns_strength = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-f") && c + 1 < argc) {
config.filter_strength = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-af")) {
config.autofilter = 1;
} else if (!strcmp(argv[c], "-jpeg_like")) {
config.emulate_jpeg_size = 1;
} else if (!strcmp(argv[c], "-mt")) {
++config.thread_level; // increase thread level
} else if (!strcmp(argv[c], "-low_memory")) {
config.low_memory = 1;
} else if (!strcmp(argv[c], "-strong")) {
config.filter_type = 1;
} else if (!strcmp(argv[c], "-nostrong")) {
config.filter_type = 0;
} else if (!strcmp(argv[c], "-sharpness") && c + 1 < argc) {
config.filter_sharpness = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-sharp_yuv")) {
config.use_sharp_yuv = 1;
} else if (!strcmp(argv[c], "-pass") && c + 1 < argc) {
config.pass = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-qrange") && c + 2 < argc) {
config.qmin = ExUtilGetInt(argv[++c], 0, &parse_error);
config.qmax = ExUtilGetInt(argv[++c], 0, &parse_error);
if (config.qmin < 0) config.qmin = 0;
if (config.qmax > 100) config.qmax = 100;
} else if (!strcmp(argv[c], "-pre") && c + 1 < argc) {
config.preprocessing = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-segments") && c + 1 < argc) {
config.segments = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-partition_limit") && c + 1 < argc) {
config.partition_limit = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-map") && c + 1 < argc) {
picture.extra_info_type = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-crop") && c + 4 < argc) {
crop = 1;
crop_x = ExUtilGetInt(argv[++c], 0, &parse_error);
crop_y = ExUtilGetInt(argv[++c], 0, &parse_error);
crop_w = ExUtilGetInt(argv[++c], 0, &parse_error);
crop_h = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-resize") && c + 2 < argc) {
resize_w = ExUtilGetInt(argv[++c], 0, &parse_error);
resize_h = ExUtilGetInt(argv[++c], 0, &parse_error);
#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);
FREE_WARGV_AND_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 + 1 < argc) {
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], "-metadata") && c + 1 < argc) {
static const struct {
const char* option;
int flag;
} kTokens[] = {
{ "all", METADATA_ALL },
{ "none", 0 },
{ "exif", METADATA_EXIF },
{ "icc", METADATA_ICC },
{ "xmp", METADATA_XMP },
};
const size_t kNumTokens = sizeof(kTokens) / sizeof(kTokens[0]);
const char* start = argv[++c];
const char* const end = start + strlen(start);
while (start < end) {
size_t i;
const char* token = strchr(start, ',');
if (token == NULL) token = end;
for (i = 0; i < kNumTokens; ++i) {
if ((size_t)(token - start) == strlen(kTokens[i].option) &&
!strncmp(start, kTokens[i].option, strlen(kTokens[i].option))) {
if (kTokens[i].flag != 0) {
keep_metadata |= kTokens[i].flag;
} else {
keep_metadata = 0;
}
break;
}
}
if (i == kNumTokens) {
fprintf(stderr, "Error! Unknown metadata type '%.*s'\n",
(int)(token - start), start);
FREE_WARGV_AND_RETURN(-1);
}
start = token + 1;
}
#ifdef HAVE_WINCODEC_H
if (keep_metadata != 0 && keep_metadata != METADATA_ICC) {
// TODO(jzern): remove when -metadata is supported on all platforms.
fprintf(stderr, "Warning: only ICC profile extraction is currently"
" supported on this platform!\n");
}
#endif
} else if (!strcmp(argv[c], "-v")) {
verbose = 1;
} else if (!strcmp(argv[c], "--")) {
if (c + 1 < argc) in_file = (const char*)GET_WARGV(argv, ++c);
break;
} else if (argv[c][0] == '-') {
fprintf(stderr, "Error! Unknown option '%s'\n", argv[c]);
HelpLong();
FREE_WARGV_AND_RETURN(-1);
} else {
in_file = (const char*)GET_WARGV(argv, c);
}
if (parse_error) {
HelpLong();
FREE_WARGV_AND_RETURN(-1);
}
}
if (in_file == NULL) {
fprintf(stderr, "No input file specified!\n");
HelpShort();
goto Error;
}
if (use_lossless_preset == 1) {
if (!WebPConfigLosslessPreset(&config, lossless_preset)) {
fprintf(stderr, "Invalid lossless preset (-z %d)\n", lossless_preset);
goto Error;
}
}
// Check for unsupported command line options for lossless mode and log
// warning for such options.
if (!quiet && config.lossless == 1) {
if (config.target_size > 0 || config.target_PSNR > 0) {
fprintf(stderr, "Encoding for specified size or PSNR is not supported"
" for lossless encoding. Ignoring such option(s)!\n");
}
if (config.partition_limit > 0) {
fprintf(stderr, "Partition limit option is not required for lossless"
" encoding. Ignoring this option!\n");
}
}
// If a target size or PSNR was given, but somehow the -pass option was
// omitted, force a reasonable value.
if (config.target_size > 0 || config.target_PSNR > 0) {
if (config.pass == 1) config.pass = 6;
}
if (!WebPValidateConfig(&config)) {
fprintf(stderr, "Error! Invalid configuration.\n");
goto Error;
}
// Read the input. We need to decide if we prefer ARGB or YUVA
// samples, depending on the expected compression mode (this saves
// some conversion steps).
picture.use_argb = (config.lossless || config.use_sharp_yuv ||
config.preprocessing > 0 ||
crop || (resize_w | resize_h) > 0);
if (verbose) {
StopwatchReset(&stop_watch);
}
if (!ReadPicture(in_file, &picture, keep_alpha,
(keep_metadata == 0) ? NULL : &metadata)) {
WFPRINTF(stderr, "Error! Cannot read input picture file '%s'\n",
(const W_CHAR*)in_file);
goto Error;
}
picture.progress_hook = (show_progress && !quiet) ? ProgressReport : NULL;
if (blend_alpha) {
WebPBlendAlpha(&picture, background_color);
}
if (verbose) {
const double read_time = StopwatchReadAndReset(&stop_watch);
fprintf(stderr, "Time to read input: %.3fs\n", read_time);
}
// The bitstream should be kept in memory when metadata must be appended
// before writing it to a file/stream, and/or when the near-losslessly encoded
// bitstream must be decoded for distortion computation (lossy will modify the
// 'picture' but not the lossless pipeline).
// Otherwise directly write the bitstream to a file.
use_memory_writer = (out_file != NULL && keep_metadata) ||
(!quiet && print_distortion >= 0 && config.lossless &&
config.near_lossless < 100);
// Open the output
if (out_file != NULL) {
const int use_stdout = !WSTRCMP(out_file, "-");
out = use_stdout ? ImgIoUtilSetBinaryMode(stdout) : WFOPEN(out_file, "wb");
if (out == NULL) {
WFPRINTF(stderr, "Error! Cannot open output file '%s'\n",
(const W_CHAR*)out_file);
goto Error;
} else {
if (!short_output && !quiet) {
WFPRINTF(stderr, "Saving file '%s'\n", (const W_CHAR*)out_file);
}
}
if (use_memory_writer) {
picture.writer = WebPMemoryWrite;
picture.custom_ptr = (void*)&memory_writer;
} else {
picture.writer = MyWriter;
picture.custom_ptr = (void*)out;
}
} else {
out = NULL;
if (use_memory_writer) {
picture.writer = WebPMemoryWrite;
picture.custom_ptr = (void*)&memory_writer;
}
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");
}
}
if (!quiet) {
picture.stats = &stats;
picture.user_data = (void*)in_file;
}
// Crop & resize.
if (verbose) {
StopwatchReset(&stop_watch);
}
if (crop != 0) {
// We use self-cropping using a view.
if (!WebPPictureView(&picture, crop_x, crop_y, crop_w, crop_h, &picture)) {
fprintf(stderr, "Error! Cannot crop picture\n");
goto Error;
}
}
if ((resize_w | resize_h) > 0) {
WebPPicture picture_no_alpha;
if (config.exact) {
// If -exact, we can't premultiply RGB by A otherwise RGB is lost if A=0.
// We rescale an opaque copy and assemble scaled A and non-premultiplied
// RGB channels. This is slower but it's a very uncommon use case. Color
// leak at sharp alpha edges is possible.
if (!WebPPictureCopy(&picture, &picture_no_alpha)) {
fprintf(stderr, "Error! Cannot copy temporary picture\n");
goto Error;
}
// We enforced picture.use_argb = 1 above. Now, remove the alpha values.
{
int x, y;
uint32_t* argb_no_alpha = picture_no_alpha.argb;
for (y = 0; y < picture_no_alpha.height; ++y) {
for (x = 0; x < picture_no_alpha.width; ++x) {
argb_no_alpha[x] |= 0xff000000; // Opaque copy.
}
argb_no_alpha += picture_no_alpha.argb_stride;
}
}
if (!WebPPictureRescale(&picture_no_alpha, resize_w, resize_h)) {
fprintf(stderr, "Error! Cannot resize temporary picture\n");
goto Error;
}
}
if (!WebPPictureRescale(&picture, resize_w, resize_h)) {
fprintf(stderr, "Error! Cannot resize picture\n");
goto Error;
}
if (config.exact) { // Put back the alpha information.
int x, y;
uint32_t* argb_no_alpha = picture_no_alpha.argb;
uint32_t* argb = picture.argb;
for (y = 0; y < picture_no_alpha.height; ++y) {
for (x = 0; x < picture_no_alpha.width; ++x) {
argb[x] = (argb[x] & 0xff000000) | (argb_no_alpha[x] & 0x00ffffff);
}
argb_no_alpha += picture_no_alpha.argb_stride;
argb += picture.argb_stride;
}
WebPPictureFree(&picture_no_alpha);
}
}
if (verbose && (crop != 0 || (resize_w | resize_h) > 0)) {
const double preproc_time = StopwatchReadAndReset(&stop_watch);
fprintf(stderr, "Time to crop/resize picture: %.3fs\n", preproc_time);
}
if (picture.extra_info_type > 0) {
AllocExtraInfo(&picture);
}
// Save original picture for later comparison. Only for lossy as lossless does
// not modify 'picture' (even near-lossless).
if (print_distortion >= 0 && !config.lossless &&
!WebPPictureCopy(&picture, &original_picture)) {
fprintf(stderr, "Error! Cannot copy temporary picture\n");
goto Error;
}
// Compress.
if (verbose) {
StopwatchReset(&stop_watch);
}
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 encode_time = StopwatchReadAndReset(&stop_watch);
fprintf(stderr, "Time to encode picture: %.3fs\n", encode_time);
}
// Get the decompressed image for the lossless pipeline.
if (!quiet && print_distortion >= 0 && config.lossless) {
if (config.near_lossless == 100) {
// Pure lossless: image was not modified, make 'original_picture' a view
// of 'picture' by copying all members except the freeable pointers.
original_picture = picture;
original_picture.memory_ = original_picture.memory_argb_ = NULL;
} else {
// Decode the bitstream stored in 'memory_writer' to get the altered image
// to 'picture'; save the 'original_picture' beforehand.
assert(use_memory_writer);
original_picture = picture;
if (!WebPPictureInit(&picture)) { // Do not free 'picture'.
fprintf(stderr, "Error! Version mismatch!\n");
goto Error;
}
picture.use_argb = 1;
if (!ReadWebP(memory_writer.mem, memory_writer.size, &picture,
/*keep_alpha=*/WebPPictureHasTransparency(&picture),
/*metadata=*/NULL)) {
fprintf(stderr, "Error! Cannot decode encoded WebP bitstream\n");
fprintf(stderr, "Error code: %d (%s)\n", picture.error_code,
kErrorMessages[picture.error_code]);
goto Error;
}
picture.stats = original_picture.stats;
}
original_picture.stats = NULL;
}
// Write the YUV planes to a PGM file. Only available for lossy.
if (dump_file) {
if (picture.use_argb) {
fprintf(stderr, "Warning: can't dump file (-d option) "
"in lossless mode.\n");
} else if (!DumpPicture(&picture, dump_file)) {
WFPRINTF(stderr, "Warning, couldn't dump picture %s\n",
(const W_CHAR*)dump_file);
}
}
if (use_memory_writer && out != NULL &&
!WriteWebPWithMetadata(out, &picture, &memory_writer, &metadata,
keep_metadata, &metadata_written)) {
fprintf(stderr, "Error writing WebP file!\n");
goto Error;
}
if (out == NULL && keep_metadata) {
// output is disabled, just display the metadata stats.
const struct {
const MetadataPayload* const payload;
int flag;
} *iter, info[] = {{&metadata.exif, METADATA_EXIF},
{&metadata.iccp, METADATA_ICC},
{&metadata.xmp, METADATA_XMP},
{NULL, 0}};
uint32_t unused1 = 0;
uint64_t unused2 = 0;
for (iter = info; iter->payload != NULL; ++iter) {
if (UpdateFlagsAndSize(iter->payload, !!(keep_metadata & iter->flag),
/*flag=*/0, &unused1, &unused2)) {
metadata_written |= iter->flag;
}
}
}
if (!quiet) {
if (!short_output || print_distortion < 0) {
if (config.lossless) {
PrintExtraInfoLossless(&picture, short_output, in_file);
} else {
PrintExtraInfoLossy(&picture, short_output, config.low_memory, in_file);
}
}
if (!short_output && picture.extra_info_type > 0) {
PrintMapInfo(&picture);
}
if (print_distortion >= 0) { // print distortion
static const char* distortion_names[] = { "PSNR", "SSIM", "LSIM" };
float values[5];
if (!WebPPictureDistortion(&picture, &original_picture,
print_distortion, values)) {
fprintf(stderr, "Error while computing the distortion.\n");
goto Error;
}
if (!short_output) {
fprintf(stderr, "%s: ", distortion_names[print_distortion]);
fprintf(stderr, "B:%.2f G:%.2f R:%.2f A:%.2f Total:%.2f\n",
values[0], values[1], values[2], values[3], values[4]);
} else {
fprintf(stderr, "%7d %.4f\n", picture.stats->coded_size, values[4]);
}
}
if (!short_output) {
PrintMetadataInfo(&metadata, metadata_written);
}
}
return_value = 0;
Error:
WebPMemoryWriterClear(&memory_writer);
WebPFree(picture.extra_info);
MetadataFree(&metadata);
WebPPictureFree(&picture);
WebPPictureFree(&original_picture);
if (out != NULL && out != stdout) {
fclose(out);
}
FREE_WARGV_AND_RETURN(return_value);
}
//------------------------------------------------------------------------------