dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2025-07-14 21:09:55 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

cwebp: add support for stdin input

Browse Source 
we map the input file into memory, even in the non-stdin case.
This is less efficient than letting the png/jpeg/... decoding libraries
use fread()'s, but more general.

Change-Id: I4501cb9a1daf69593eb8e3326c115cd8cbdf92fd
This commit is contained in:
Pascal Massimino
2015-12-08 08:22:41 +01:00
parent 6c702b81ac
commit a9947c3244
9 changed files with 154 additions and 93 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
examples/jpegdec.c
View File

@ -254,8 +254,8 @@ static void ContextSetup(volatile struct jpeg_decompress_struct* const cinfo,
ctx->pub.next_input_byte = NULL;
}
int ReadJPEG(const char* const filename, WebPPicture* const pic,
Metadata* const metadata) {
int ReadJPEG(const uint8_t* const data, size_t data_size,
WebPPicture* const pic, Metadata* const metadata) {
volatile int ok = 0;
int stride, width, height;
volatile struct jpeg_decompress_struct dinfo;
@ -265,9 +265,8 @@ int ReadJPEG(const char* const filename, WebPPicture* const pic,
JPEGReadContext ctx;
memset(&ctx, 0, sizeof(ctx));
ok = ExUtilReadFile(filename, &ctx.data, &ctx.data_size);
if (!ok) goto End;
ctx.data = data;
ctx.data_size = data_size;
memset((j_decompress_ptr)&dinfo, 0, sizeof(dinfo)); // for setjmp sanity
dinfo.err = jpeg_std_error(&jerr.pub);
@ -330,14 +329,14 @@ int ReadJPEG(const char* const filename, WebPPicture* const pic,
End:
free(rgb);
free((void*)ctx.data);
return ok;
}
#else // !WEBP_HAVE_JPEG
int ReadJPEG(const char* const filename,
int ReadJPEG(const uint8_t* const data, size_t data_size,
struct WebPPicture* const pic,
struct Metadata* const metadata) {
(void)filename;
(void)data;
(void)data_size;
(void)pic;
(void)metadata;
fprintf(stderr, "JPEG support not compiled. Please install the libjpeg "