static int
bitmap_decode(struct jpeg_decompress_struct *cinfo, Vbitmap *vbitmap,
YmagineFormatOptions *options)
{
int nlines = -1;
cinfo->client_data = (void*) vbitmap;
if (prepareDecompressor(cinfo, options) != YMAGINE_OK) {
return nlines;
}
/* Intercept APP1 markers for PhotoSphere parsing */
jpeg_set_marker_processor(cinfo, JPEG_APP0 + 1, APP1_handler);
if (startDecompressor(cinfo, VbitmapColormode(vbitmap)) != YMAGINE_OK) {
return nlines;
}
YmagineFormatOptions_invokeCallback(options, YMAGINE_IMAGEFORMAT_JPEG,
cinfo->image_width, cinfo->image_height);
#if YMAGINE_DEBUG_JPEG
ALOGD("bitmap_decode: in=%dx%d bm=%dx%d max=%dx%d",
cinfo->image_width, cinfo->image_height,
VbitmapWidth(vbitmap), VbitmapHeight(vbitmap),
options->maxwidth, options->maxheight);
#endif
nlines = decompress_jpeg(cinfo, NULL, JCOPYOPT_NONE,
vbitmap, options);
return nlines;
}
static int
WEBPDecode(WEBPDec* pSrc, Vbitmap *vbitmap,
YmagineFormatOptions *options)
{
int contentSize;
int origWidth = 0;
int origHeight = 0;
int quality;
unsigned char header[WEBP_HEADER_SIZE + 32];
int headerlen;
int toRead;
unsigned char *input = NULL;
int inputlen;
int oformat;
int opitch;
unsigned char *odata;
int rc;
Vrect srcrect;
Vrect destrect;
WebPIDecoder* idec;
if (options == NULL) {
/* Options argument is mandatory */
return 0;
}
headerlen = YchannelRead(pSrc->channel, (char *) header, sizeof(header));
if (headerlen < WEBP_HEADER_SIZE) {
return 0;
}
/* Check WEBP header */
contentSize = WebpCheckHeader((const char*) header, headerlen);
if (contentSize <= 0) {
return 0;
}
if (WebPGetInfo(header, headerlen, &origWidth, &origHeight) == 0) {
ALOGD("invalid VP8 header");
return 0;
}
if (origWidth <= 0 || origHeight <= 0) {
return 0;
}
if (YmagineFormatOptions_invokeCallback(options, YMAGINE_IMAGEFORMAT_WEBP,
origWidth, origHeight) != YMAGINE_OK) {
return 0;
}
if (YmaginePrepareTransform(vbitmap, options,
origWidth, origHeight,
&srcrect, &destrect) != YMAGINE_OK) {
return 0;
}
#if YMAGINE_DEBUG_WEBP
ALOGD("size: %dx%d req: %dx%d %s -> output: %dx%d",
origWidth, origHeight,
destrect.width, destrect.height,
(options->scalemode == YMAGINE_SCALE_CROP) ? "crop" :
(options->scalemode == YMAGINE_SCALE_FIT ? "fit" : "letterbox"),
destrect.width, destrect.height);
#endif
if (vbitmap != NULL) {
if (options->resizable) {
destrect.x = 0;
destrect.y = 0;
if (VbitmapResize(vbitmap, destrect.width, destrect.height) != YMAGINE_OK) {
return 0;
}
}
if (VbitmapType(vbitmap) == VBITMAP_NONE) {
/* Decode bounds only, return positive number (number of lines) on success */
return VbitmapHeight(vbitmap);
}
}
pSrc->bitmap = vbitmap;
inputlen = contentSize;
toRead = inputlen - headerlen;
rc = VbitmapLock(vbitmap);
if (rc != YMAGINE_OK) {
ALOGE("VbitmapLock() failed (code %d)", rc);
rc = YMAGINE_ERROR;
} else {
odata = VbitmapBuffer(vbitmap);
opitch = VbitmapPitch(vbitmap);
oformat = VbitmapColormode(vbitmap);
pSrc->inwidth = origWidth;
pSrc->inheight = origHeight;
pSrc->outwidth = destrect.width;
pSrc->outheight = destrect.height;
if (odata == NULL) {
ALOGD("failed to get reference to pixel buffer");
rc = YMAGINE_ERROR;
} else {
WebPDecoderConfig config;
int supported = 1;
int webpcolorspace;
switch(oformat) {
case VBITMAP_COLOR_RGBA:
webpcolorspace = MODE_RGBA;
break;
case VBITMAP_COLOR_RGB:
webpcolorspace = MODE_RGB;
break;
case VBITMAP_COLOR_rgbA:
webpcolorspace = MODE_rgbA;
break;
case VBITMAP_COLOR_ARGB:
webpcolorspace = MODE_ARGB;
break;
case VBITMAP_COLOR_Argb:
webpcolorspace = MODE_Argb;
break;
case VBITMAP_COLOR_GRAYSCALE:
case VBITMAP_COLOR_YUV:
case VBITMAP_COLOR_CMYK:
case VBITMAP_COLOR_YCbCr:
default:
supported = 0;
break;
}
if (!supported) {
ALOGD("currently only support RGB, RGBA webp decoding");
rc = YMAGINE_ERROR;
} else {
pSrc->isdirect = 1;
pSrc->outformat = oformat;
pSrc->outbpp = VbitmapBpp(vbitmap);
pSrc->outstride = opitch;
pSrc->outbuffer = odata + destrect.x * pSrc->outbpp + destrect.y * pSrc->outstride;
WebPInitDecoderConfig(&config);
quality = YmagineFormatOptions_normalizeQuality(options);
if (quality < 90) {
config.options.no_fancy_upsampling = 1;
}
if (quality < 60) {
config.options.bypass_filtering = 1;
}
config.options.use_threads = 1;
if (srcrect.x != 0 || srcrect.y != 0 || srcrect.width != origWidth || srcrect.height != origHeight) {
/* Crop on source */
config.options.use_cropping = 1;
config.options.crop_left = srcrect.x;
config.options.crop_top = srcrect.y;
config.options.crop_width = srcrect.width;
config.options.crop_height = srcrect.height;
}
if (pSrc->outwidth != pSrc->inwidth || pSrc->outheight != pSrc->inheight) {
config.options.use_scaling = 1;
config.options.scaled_width = pSrc->outwidth;
config.options.scaled_height = pSrc->outheight;
}
rc = YMAGINE_ERROR;
// Specify the desired output colorspace:
config.output.colorspace = webpcolorspace;
// Have config.output point to an external buffer:
config.output.u.RGBA.rgba = (uint8_t*) pSrc->outbuffer;
config.output.u.RGBA.stride = pSrc->outstride;
config.output.u.RGBA.size = pSrc->outstride * pSrc->outheight;
config.output.is_external_memory = 1;
idec = WebPIDecode(NULL, 0, &config);
if (idec != NULL) {
VP8StatusCode status;
status = WebPIAppend(idec, header, headerlen);
if (status == VP8_STATUS_OK || status == VP8_STATUS_SUSPENDED) {
int bytes_remaining = toRead;
int bytes_read;
int bytes_req;
unsigned char rbuf[8192];
// See WebPIUpdate(idec, buffer, size_of_transmitted_buffer);
bytes_req = sizeof(rbuf);
while (bytes_remaining > 0) {
if (bytes_req > bytes_remaining) {
bytes_req = bytes_remaining;
}
bytes_read = YchannelRead(pSrc->channel, rbuf, bytes_req);
if (bytes_read <= 0) {
break;
}
status = WebPIAppend(idec, (uint8_t*) rbuf, bytes_read);
if (status == VP8_STATUS_OK) {
rc = YMAGINE_OK;
break;
} else if (status == VP8_STATUS_SUSPENDED) {
if (bytes_remaining > 0) {
bytes_remaining -= bytes_read;
}
} else {
/* error */
break;
}
// The above call decodes the current available buffer.
// Part of the image can now be refreshed by calling
// WebPIDecGetRGB()/WebPIDecGetYUVA() etc.
}
}
}
// the object doesn't own the image memory, so it can now be deleted.
WebPIDelete(idec);
WebPFreeDecBuffer(&config.output);
}
}
VbitmapUnlock(vbitmap);
}
if (input) {
Ymem_free((char*) input);
}
if (!pSrc->isdirect) {
Ymem_free(pSrc->outbuffer);
}
if (rc == YMAGINE_OK) {
return origHeight;
}
return 0;
}
int
transcodeJPEG(Ychannel *channelin, Ychannel *channelout,
YmagineFormatOptions *options)
{
struct jpeg_decompress_struct cinfo;
struct noop_error_mgr jerr;
struct jpeg_compress_struct cinfoout;
struct noop_error_mgr jerr2;
int rc = YMAGINE_ERROR;
int nlines = 0;
int quality = YmagineFormatOptions_normalizeQuality(options);
if (!YchannelReadable(channelin) || !YchannelWritable(channelout)) {
return rc;
}
memset(&cinfo, 0, sizeof(struct jpeg_decompress_struct));
cinfo.err = noop_jpeg_std_error(&jerr.pub);
memset(&cinfoout, 0, sizeof(struct jpeg_compress_struct));
cinfoout.err = noop_jpeg_std_error(&jerr2.pub);
if (setjmp(jerr.setjmp_buffer)) {
/* If we get here, the JPEG code has signaled an error in decoder */
noop_append_jpeg_message((j_common_ptr) &cinfo);
} else if (setjmp(jerr2.setjmp_buffer)) {
/* If we get here, the JPEG code has signaled an error in encoder */
noop_append_jpeg_message((j_common_ptr) &cinfoout);
} else {
jpeg_create_decompress(&cinfo);
/* Equivalent to:
jpeg_CreateCompress(&cinfoout, JPEG_LIB_VERSION,
(size_t) sizeof(struct jpeg_compress_struct));
*/
jpeg_create_compress(&cinfoout);
if (ymaginejpeg_input(&cinfo, channelin) >= 0 &&
ymaginejpeg_output(&cinfoout, channelout) >= 0) {
if (prepareDecompressor(&cinfo, options) == YMAGINE_OK) {
/* markers copy option (NONE, COMMENTS or ALL) */
JCOPY_OPTION copyoption;
int metamode = YMAGINE_METAMODE_DEFAULT;
if (options != NULL) {
metamode = options->metamode;
}
if (metamode == YMAGINE_METAMODE_NONE) {
copyoption = JCOPYOPT_NONE;
} else if (metamode == YMAGINE_METAMODE_COMMENTS) {
copyoption = JCOPYOPT_COMMENTS;
} else if (metamode == YMAGINE_METAMODE_ALL) {
copyoption = JCOPYOPT_ALL;
} else {
/* Default to copy all markers */
copyoption = JCOPYOPT_ALL;
}
/* Enable saving of extra markers that we want to copy */
if (copyoption != JCOPYOPT_NONE) {
jcopy_markers_setup(&cinfo, copyoption);
}
/* Force image to be decoded without colorspace conversion if possible */
if (jpeg_read_header(&cinfo, TRUE) == JPEG_HEADER_OK) {
YmagineFormatOptions_invokeCallback(options, YMAGINE_IMAGEFORMAT_JPEG,
cinfo.image_width, cinfo.image_height);
/* Other compression settings */
int optimize = 0;
int progressive = 0;
int grayscale = 0;
if (quality >= 90) {
optimize = 1;
}
if (options != NULL && options->pixelshader != NULL) {
/* If a shader is enabled, force RGBA mode */
cinfo.out_color_space = JCS_EXT_RGBA;
cinfoout.in_color_space = cinfo.out_color_space;
cinfoout.input_components = 4;
} else if (options != NULL && options->sharpen > 0.0f) {
cinfo.out_color_space = JCS_RGB;
cinfoout.in_color_space = cinfo.out_color_space;
cinfoout.input_components = 3;
} else {
/* Otherwise sse same colorspace than input image (typically YCbCr) */
cinfo.out_color_space = cinfo.jpeg_color_space;
cinfoout.in_color_space = cinfo.out_color_space;
cinfoout.input_components = JpegPixelSize(cinfoout.in_color_space);
}
jpeg_set_defaults(&cinfoout);
cinfoout.optimize_coding = FALSE;
jpeg_set_quality(&cinfoout, quality, FALSE);
if (grayscale) {
/* Force a monochrome JPEG file to be generated. */
jpeg_set_colorspace(&cinfoout, JCS_GRAYSCALE);
}
if (optimize) {
/* Enable entropy parm optimization. */
cinfoout.optimize_coding = TRUE;
}
/* If non-zero, the input image is smoothed; the value should
be 1 for minimal smoothing to 100 for maximum smoothing. */
cinfoout.smoothing_factor = 0;
if (progressive) {
/* Select simple progressive mode. */
jpeg_simple_progression(&cinfoout);
}
setCompressorOptions(&cinfoout, options);
cinfo.client_data = (void*) NULL;
cinfoout.client_data = (void*) NULL;
nlines = decompress_jpeg(&cinfo, &cinfoout, copyoption, NULL, options);
if (nlines > 0) {
rc = YMAGINE_OK;
}
}
}
}
}
jpeg_destroy_compress(&cinfoout);
jpeg_destroy_decompress(&cinfo);
return rc;
}
