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Add -incremental option to dwebp

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useful for testing. Not listed in the man or README, since
it's only useful for testing the incremental decoding
(e.g. measuring the timing difference compared to non-incremental)

Change-Id: I8df8046e031d21006242babb5bcac09f8ff9f710
This commit is contained in:
skal 2013-09-19 13:20:45 +02:00
parent 54b8e3f6e2
commit 5cd43e4316
1 changed files with 21 additions and 3 deletions
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22
examples/dwebp.c
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@ -559,6 +559,7 @@ static void Help(void) {
" -crop <x> <y> <w> <h> ... crop output with the given rectangle\n"
" -scale <w> <h> .......... scale the output (*after* any cropping)\n"
" -alpha ....... only save the alpha plane.\n"
" -incremental . use incremental decoding (useful for tests)\n"
" -h ....... this help message.\n"
" -v ....... verbose (e.g. print encoding/decoding times)\n"
#ifndef WEBP_DLL
@ -581,6 +582,7 @@ int main(int argc, const char *argv[]) {
WebPDecBuffer* const output_buffer = &config.output;
WebPBitstreamFeatures* const bitstream = &config.input;
OutputFileFormat format = PNG;
int incremental = 0;
int c;
if (!WebPInitDecoderConfig(&config)) {
@ -635,6 +637,8 @@ int main(int argc, const char *argv[]) {
} else if (!strcmp(argv[c], "-noasm")) {
VP8GetCPUInfo = NULL;
#endif
} else if (!strcmp(argv[c], "-incremental")) {
incremental = 1;
} else if (argv[c][0] == '-') {
fprintf(stderr, "Unknown option '%s'\n", argv[c]);
Help();
@ -706,7 +710,21 @@ int main(int argc, const char *argv[]) {
free((void*)data);
return -1;
}
// Decoding call.
if (!incremental) {
status = WebPDecode(data, data_size, &config);
} else {
WebPIDecoder* const idec = WebPINewDecoder(output_buffer);
if (idec == NULL) {
fprintf(stderr, "Failed during WebPINewDecoder().\n");
status = VP8_STATUS_OUT_OF_MEMORY;
ok = 0;
} else {
status = WebPIUpdate(idec, data, data_size);
WebPIDelete(idec);
}
}
if (verbose) {
const double decode_time = StopwatchReadAndReset(&stop_watch);
@ -718,7 +736,7 @@ int main(int argc, const char *argv[]) {
if (!ok) {
fprintf(stderr, "Decoding of %s failed.\n", in_file);
fprintf(stderr, "Status: %d (%s)\n", status, kStatusMessages[status]);
return -1;
goto Exit;
}
}
@ -734,8 +752,8 @@ int main(int argc, const char *argv[]) {
fprintf(stderr, "Nothing written; "
"use -o flag to save the result as e.g. PNG.\n");
}
Exit:
WebPFreeDecBuffer(output_buffer);
return ok ? 0 : -1;
}