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cwebp: output metadata statistics

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Change-Id: Ida33555bab3c9330e82158863c355e51f90d0a76
This commit is contained in:
James Zern 2013-03-13 14:41:38 -07:00
parent 5e338e0b9a
commit 0bc42689e4
1 changed files with 38 additions and 5 deletions
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43
examples/cwebp.c
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@ -374,6 +374,22 @@ enum {
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_ICCP) {
fprintf(stderr, " * ICC profile: %6zu bytes\n", metadata->iccp.size);
}
if (metadata_written & METADATA_EXIF) {
fprintf(stderr, " * EXIF data: %6zu bytes\n", metadata->exif.size);
}
if (metadata_written & METADATA_XMP) {
fprintf(stderr, " * XMP data: %6zu bytes\n", 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];
@ -424,7 +440,8 @@ static int WriteWebPWithMetadata(FILE* const out,
const WebPPicture* const picture,
const WebPMemoryWriter* const memory_writer,
const Metadata* const metadata,
int keep_metadata) {
int keep_metadata,
int* const metadata_written) {
const char kVP8XHeader[] = "VP8X\x0a\x00\x00\x00";
const int kAlphaFlag = 0x10;
const int kEXIFFlag = 0x08;
@ -446,6 +463,9 @@ static int WriteWebPWithMetadata(FILE* const out,
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 "
@ -482,11 +502,20 @@ static int WriteWebPWithMetadata(FILE* const out,
ok = ok && WriteLE24(out, picture->width - 1);
ok = ok && WriteLE24(out, picture->height - 1);
}
if (write_iccp) ok = ok && WriteMetadataChunk(out, "ICCP", &metadata->iccp);
if (write_iccp) {
ok = ok && WriteMetadataChunk(out, "ICCP", &metadata->iccp);
*metadata_written |= METADATA_ICCP;
}
// Image
ok = ok && (fwrite(webp, webp_size, 1, out) == 1);
if (write_exif) ok = ok && WriteMetadataChunk(out, "EXIF", &metadata->exif);
if (write_xmp) ok = ok && WriteMetadataChunk(out, "XMP ", &metadata->xmp);
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;
} else {
// No metadata, just write the original image file.
@ -631,6 +660,7 @@ int main(int argc, const char *argv[]) {
int resize_w = 0, resize_h = 0;
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
@ -978,7 +1008,7 @@ int main(int argc, const char *argv[]) {
if (keep_metadata != 0 && out != NULL) {
if (!WriteWebPWithMetadata(out, &picture, &memory_writer,
&metadata, keep_metadata)) {
&metadata, keep_metadata, &metadata_written)) {
fprintf(stderr, "Error writing WebP file with metadata!\n");
goto Error;
}
@ -990,6 +1020,9 @@ int main(int argc, const char *argv[]) {
} else {
PrintExtraInfoLossy(&picture, short_output, config.low_memory, in_file);
}
if (!short_output) {
PrintMetadataInfo(&metadata, metadata_written);
}
}
if (!quiet && !short_output && print_distortion >= 0) { // print distortion
static const char* distortion_names[] = { "PSNR", "SSIM", "LSIM" };