int
encodeWEBP(Vbitmap *vbitmap, Ychannel *channelout, YmagineFormatOptions *options)
{
int rc = YMAGINE_ERROR;
#if HAVE_WEBP
WebPConfig config;
WebPPicture picture;
WebPPreset preset = WEBP_PRESET_PHOTO; // One of DEFAULT, PICTURE, PHOTO, DRAWING, ICON or TEXT
int width;
int height;
int pitch;
int quality;
const unsigned char *pixels;
int colormode;
/*
* List of encoding options for WebP config
* int lossless; // Lossless encoding (0=lossy(default), 1=lossless).
* float quality; // between 0 (smallest file) and 100 (biggest)
* int method; // quality/speed trade-off (0=fast, 6=slower-better)
*
* WebPImageHint image_hint; // Hint for image type (lossless only for now).
*
* // Parameters related to lossy compression only:
* int target_size; // if non-zero, set the desired target size in bytes.
* // Takes precedence over the 'compression' parameter.
* float target_PSNR; // if non-zero, specifies the minimal distortion to
* // try to achieve. Takes precedence over target_size.
* int segments; // maximum number of segments to use, in [1..4]
* int sns_strength; // Spatial Noise Shaping. 0=off, 100=maximum.
* int filter_strength; // range: [0 = off .. 100 = strongest]
* int filter_sharpness; // range: [0 = off .. 7 = least sharp]
* int filter_type; // filtering type: 0 = simple, 1 = strong (only used
* // if filter_strength > 0 or autofilter > 0)
* int autofilter; // Auto adjust filter's strength [0 = off, 1 = on]
* int alpha_compression; // Algorithm for encoding the alpha plane (0 = none,
* // 1 = compressed with WebP lossless). Default is 1.
* int alpha_filtering; // Predictive filtering method for alpha plane.
* // 0: none, 1: fast, 2: best. Default if 1.
* int alpha_quality; // Between 0 (smallest size) and 100 (lossless).
* // Default is 100.
* int pass; // number of entropy-analysis passes (in [1..10]).
*
* int show_compressed; // if true, export the compressed picture back.
* // In-loop filtering is not applied.
* int preprocessing; // preprocessing filter (0=none, 1=segment-smooth)
* int partitions; // log2(number of token partitions) in [0..3]
* // Default is set to 0 for easier progressive decoding.
* int partition_limit; // quality degradation allowed to fit the 512k limit on
* // prediction modes coding (0: no degradation,
* // 100: maximum possible degradation).
*/
colormode = VbitmapColormode(vbitmap);
if (colormode != VBITMAP_COLOR_RGBA && colormode != VBITMAP_COLOR_RGB) {
ALOGD("currently only support RGB, RGBA webp encoding");
return rc;
}
quality = YmagineFormatOptions_normalizeQuality(options);
if (!WebPConfigPreset(&config, preset, (float) quality)) {
return YMAGINE_ERROR; // version error
}
if (options && options->accuracy >= 0) {
int method = options->accuracy / 15;
if (method > 6) {
method = 6;
}
config.method = method;
}
if (!WebPValidateConfig(&config)) {
// parameter ranges verification failed
return YMAGINE_ERROR;
}
rc = VbitmapLock(vbitmap);
if (rc < 0) {
ALOGE("AndroidBitmap_lockPixels() failed");
return YMAGINE_ERROR;
}
width = VbitmapWidth(vbitmap);
height = VbitmapHeight(vbitmap);
pitch = VbitmapPitch(vbitmap);
pixels = VbitmapBuffer(vbitmap);
if (WebPPictureInit(&picture)) {
picture.use_argb = 1;
picture.width = width;
picture.height = height;
picture.writer = WebPYchannelWrite;
picture.custom_ptr = channelout;
if (colormode == VBITMAP_COLOR_RGBA) {
WebPPictureImportRGBA(&picture, pixels, pitch);
} else {
WebPPictureImportRGB(&picture, pixels, pitch);
}
WebPEncode(&config, &picture);
WebPPictureFree(&picture);
}
VbitmapUnlock(vbitmap);
rc = YMAGINE_OK;
#endif
return rc;
}
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;
}
int
encodeJPEG(Vbitmap *vbitmap, Ychannel *channelout, YmagineFormatOptions *options)
{
struct jpeg_compress_struct cinfoout;
struct noop_error_mgr jerr;
int result = YMAGINE_ERROR;
int rc;
int nlines = 0;
JSAMPROW row_pointer[1];
unsigned char *pixels;
int width;
int height;
int pitch;
int colormode;
int i;
if (!YchannelWritable(channelout)) {
return result;
}
if (vbitmap == NULL) {
return result;
}
rc = VbitmapLock(vbitmap);
if (rc != YMAGINE_OK) {
ALOGE("AndroidBitmap_lockPixels() failed");
return result;
}
memset(&cinfoout, 0, sizeof(struct jpeg_compress_struct));
cinfoout.err = noop_jpeg_std_error(&jerr.pub);
if (setjmp(jerr.setjmp_buffer)) {
/* If we get here, the JPEG code has signaled an error in encoder */
noop_append_jpeg_message((j_common_ptr) &cinfoout);
} else {
/* Equivalent to:
jpeg_CreateCompress(&cinfoout, JPEG_LIB_VERSION,
(size_t) sizeof(struct jpeg_compress_struct));
*/
jpeg_create_compress(&cinfoout);
if (ymaginejpeg_output(&cinfoout, channelout) >= 0) {
/* Other compression settings */
int optimize = 0;
int progressive = 0;
int grayscale = 0;
int quality = YmagineFormatOptions_normalizeQuality(options);
if (quality >= 90) {
optimize = 1;
}
width = VbitmapWidth(vbitmap);
height = VbitmapHeight(vbitmap);
pitch = VbitmapPitch(vbitmap);
colormode = VbitmapColormode(vbitmap);
cinfoout.image_width = width;
cinfoout.image_height = height;
set_colormode(&cinfoout, colormode);
jpeg_set_defaults(&cinfoout);
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 (progressive) {
/* Select simple progressive mode. */
jpeg_simple_progression(&cinfoout);
}
setCompressorOptions(&cinfoout, options);
jpeg_start_compress(&cinfoout, TRUE);
pixels = VbitmapBuffer(vbitmap);
for (i = 0; i < height; i++) {
row_pointer[0] = pixels + i * pitch;
jpeg_write_scanlines(&cinfoout, row_pointer, 1);
nlines++;
}
if (nlines > 0) {
rc = YMAGINE_OK;
}
/* Clean up compressor */
jpeg_finish_compress(&cinfoout);
}
}
jpeg_destroy_compress(&cinfoout);
VbitmapUnlock(vbitmap);
return rc;
}
static int
prepareDecompressor(struct jpeg_decompress_struct *cinfo, YmagineFormatOptions *options)
{
int quality = YmagineFormatOptions_normalizeQuality(options);
if (cinfo == NULL) {
return YMAGINE_ERROR;
}
if (1) {
cinfo->mem->max_memory_to_use = 30 * 1024 * 1024;
} else {
cinfo->mem->max_memory_to_use = 5 * 1024 * 1024;
}
if (quality < 90) {
/* DCT method, one of JDCT_FASTEST, JDCT_IFAST, JDCT_ISLOW or JDCT_FLOAT */
cinfo->dct_method = JDCT_IFAST;
/* To perform 2-pass color quantization, the decompressor also needs a
128K color lookup table and a full-image pixel buffer (3 bytes/pixel). */
cinfo->two_pass_quantize = FALSE;
/* No dithering with RGBA output. Use JDITHER_ORDERED only for JCS_RGB_565 */
cinfo->dither_mode = JDITHER_NONE;
/* Low visual impact but big performance benefit when turning off fancy up-sampling */
cinfo->do_fancy_upsampling = FALSE;
cinfo->do_block_smoothing = FALSE;
cinfo->enable_2pass_quant = FALSE;
} else {
cinfo->dct_method = JDCT_ISLOW;
if (quality >= 92) {
cinfo->do_block_smoothing = TRUE;
}
/* Low visual impact but big performance benefit when turning off fancy up-sampling */
if (quality >= 98) {
cinfo->do_fancy_upsampling = TRUE;
}
if (quality >= 97) {
cinfo->enable_2pass_quant = TRUE;
}
}
/* Accuracy specified? If so, set the DCT method accordingly.
It's toggling between JDCT_ISLOW and JDCT_IFAST;
JDCT_FLOAT is apparently not a good option
see: http://svn.code.sf.net/p/libjpeg-turbo/code/trunk/libjpeg.txt */
if (options->accuracy >= 0) {
if (options->accuracy < 50) {
cinfo->dct_method = JDCT_IFAST;
} else {
cinfo->dct_method = JDCT_ISLOW;
}
}
return YMAGINE_OK;
}
