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;
}
int
VbitmapBpp(Vbitmap *vbitmap)
{
if (vbitmap == NULL) {
return 0;
}
return colorBpp(VbitmapColormode(vbitmap));
}
int
TransformerSetBitmap(Transformer *transformer, Vbitmap *vbitmap,
int offsetx, int offsety)
{
int rc = YMAGINE_OK;
if (transformer == NULL) {
return YMAGINE_ERROR;
}
if (transformer->obitmap != NULL) {
VbitmapUnlock(transformer->obitmap);
}
if (vbitmap != NULL) {
rc = VbitmapLock(vbitmap);
if (rc != YMAGINE_OK) {
vbitmap = NULL;
}
}
transformer->obitmap = vbitmap;
if (vbitmap == NULL) {
transformer->obitmap = NULL;
transformer->obuffer = NULL;
transformer->owidth = 0;
transformer->oheight = 0;
transformer->opitch = 0;
transformer->omode = VBITMAP_COLOR_RGBA;
transformer->obpp = 0;
transformer->offsetx = 0;
transformer->offsety = 0;
} else {
transformer->obitmap = vbitmap;
transformer->obuffer = VbitmapBuffer(vbitmap);
transformer->owidth = VbitmapWidth(vbitmap);
transformer->oheight = VbitmapHeight(vbitmap);
transformer->opitch = VbitmapPitch(vbitmap);
transformer->omode = VbitmapColormode(vbitmap);
transformer->obpp = colorBpp(transformer->omode);
transformer->offsetx = offsetx;
transformer->offsety = offsety;
}
return rc;
}
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;
}
/* Methods */
int
VbitmapResize(Vbitmap *vbitmap, int width, int height)
{
if (vbitmap == NULL) {
return YMAGINE_ERROR;
}
if (width <= 0 || height <= 0) {
return YMAGINE_ERROR;
}
if (width == vbitmap->width && height == vbitmap->height) {
/* Size not changed, ignore */
return YMAGINE_OK;
}
if (vbitmap->bitmaptype == VBITMAP_NONE) {
vbitmap->width = width;
vbitmap->height = height;
return YMAGINE_OK;
}
if (vbitmap->bitmaptype == VBITMAP_ANDROID) {
AndroidBitmapInfo bitmapinfo;
jobject jbitmap;
jobject jbitmapref;
int ret;
JNIEnv *jenv = getEnv(vbitmap);
if (jenv == NULL) {
return YMAGINE_ERROR;
}
jbitmap = createAndroidBitmap(jenv, width, height);
if (jbitmap == NULL) {
return YMAGINE_ERROR;
}
ret = AndroidBitmap_getInfo(jenv, jbitmap, &bitmapinfo);
if (ret < 0 ||
bitmapinfo.format != ANDROID_BITMAP_FORMAT_RGBA_8888 ||
bitmapinfo.width != width || bitmapinfo.height != height) {
return YMAGINE_ERROR;
}
jbitmapref = (*jenv)->NewGlobalRef(jenv, jbitmap);
if (jbitmapref == NULL) {
return YMAGINE_ERROR;
}
/* Replace Bitmap */
if (vbitmap->jbitmap != NULL) {
if (vbitmap->jkeepref) {
(*jenv)->DeleteGlobalRef(jenv, vbitmap->jbitmap);
vbitmap->jkeepref = 0;
}
vbitmap->jbitmap = NULL;
}
#if VBITMAP_ENABLE_GLOBAL_REF
vbitmap->jbitmap = jbitmapref;
vbitmap->jkeepref = 1;
#else
vbitmap->jbitmap = jbitmap;
vbitmap->jkeepref = 0;
(*jenv)->DeleteGlobalRef(jenv, jbitmapref);
#endif
vbitmap->width = bitmapinfo.width;
vbitmap->height = bitmapinfo.height;
vbitmap->pitch = bitmapinfo.stride;
return YMAGINE_OK;
}
if (vbitmap->bitmaptype == VBITMAP_MEMORY) {
int bpp = colorBpp(VbitmapColormode(vbitmap));
int pitch = width * bpp;
unsigned char *pixels = NULL;
if (pitch > 0) {
pixels = Ymem_malloc(pitch * height);
}
if (pixels == NULL) {
return YMAGINE_ERROR;
}
if (vbitmap->pixels != NULL) {
Ymem_free(vbitmap->pixels);
}
vbitmap->pixels = pixels;
vbitmap->width = width;
vbitmap->height = height;
vbitmap->pitch = pitch;
return YMAGINE_OK;
}
if (vbitmap->bitmaptype == VBITMAP_STATIC) {
/* Can't resize a static bitmap */
return YMAGINE_ERROR;
}
return YMAGINE_ERROR;
}
int
Vbitmap_sobel(Vbitmap *outbitmap, Vbitmap *vbitmap)
{
int width;
int height;
int pitch;
int bpp;
unsigned char *pixels;
int owidth;
int oheight;
int opitch;
int obpp;
unsigned char *opixels;
int i, j;
unsigned char *inp;
unsigned char *outp;
if (vbitmap == NULL) {
return YMAGINE_ERROR;
}
if (VbitmapLock(vbitmap) >= 0) {
pixels = VbitmapBuffer(vbitmap);
width = VbitmapWidth(vbitmap);
height = VbitmapHeight(vbitmap);
pitch = VbitmapPitch(vbitmap);
bpp = colorBpp(VbitmapColormode(vbitmap));
if (VbitmapLock(outbitmap) >= 0) {
opixels = VbitmapBuffer(outbitmap);
owidth = VbitmapWidth(outbitmap);
oheight = VbitmapHeight(outbitmap);
opitch = VbitmapPitch(outbitmap);
obpp = colorBpp(VbitmapColormode(outbitmap));
if (width != owidth || height != oheight) {
VbitmapUnlock(outbitmap);
if (VbitmapResize(outbitmap, width, height) == YMAGINE_OK) {
if (VbitmapLock(outbitmap) < 0) {
VbitmapUnlock(vbitmap);
return YMAGINE_ERROR;
}
opixels = VbitmapBuffer(outbitmap);
owidth = VbitmapWidth(outbitmap);
oheight = VbitmapHeight(outbitmap);
opitch = VbitmapPitch(outbitmap);
obpp = colorBpp(VbitmapColormode(outbitmap));
}
}
if (width == owidth && height == oheight && bpp >= 3) {
for (j = 0; j < height; j++) {
inp = pixels + pitch * j;
outp = opixels + opitch * j;
outp[0] = EnergySobel(inp, bpp, pitch, 0, j, width, height);
outp += obpp;
inp += bpp;
if (j != 0 && j != height-1) {
for (i = 1; i < width - 1; i++) {
outp[0] = EnergySobelFast(inp, bpp, pitch);
outp += obpp;
inp += bpp;
}
} else {
for (i = 1; i < width - 1; i++) {
outp[0] = EnergySobel(inp, bpp, pitch, i, j, width, height);
outp += obpp;
inp += bpp;
}
}
outp[0] = EnergySobel(inp, bpp, pitch, width - 1, j, width, height);
}
if (obpp >= 3) {
for (j = 0; j < height; j++) {
outp = opixels + opitch * j;
for (i = 0; i < width; i++) {
outp[1] = outp[0];
outp[2] = outp[0];
if (obpp == 4) {
outp[0] = 0xff;
}
outp += obpp;
}
}
}
}
VbitmapUnlock(outbitmap);
}
VbitmapUnlock(vbitmap);
}
return YMAGINE_OK;
}
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 YOPTIMIZE_SPEED int
decompress_jpeg(struct jpeg_decompress_struct *cinfo,
struct jpeg_compress_struct *cinfoout, JCOPY_OPTION copyoption,
Vbitmap *vbitmap, YmagineFormatOptions *options)
{
int scanlines;
int nlines;
int totallines;
int j;
int scalenum = -1;
JSAMPARRAY buffer;
Vrect srcrect;
Vrect destrect;
size_t row_stride;
Transformer *transformer;
PixelShader *shader = NULL;
int iwidth, iheight;
float sharpen = 0.0f;
if (vbitmap == NULL && cinfoout == NULL) {
/* No output specified */
return 0;
}
if (options == NULL) {
/* Options argument is mandatory */
return 0;
}
iwidth = cinfo->image_width;
iheight = cinfo->image_height;
if (YmaginePrepareTransform(vbitmap, options,
iwidth, iheight,
&srcrect, &destrect) != YMAGINE_OK) {
return 0;
}
shader = options->pixelshader;
sharpen = options->sharpen;
/* Define if image can be pre-subsampled by a ratio n/8 (n=1..7) */
scalenum = GetScaleNum(destrect.width, destrect.height,
srcrect.width, srcrect.height,
options->scalemode);
if (scalenum > 0 && scalenum < 8) {
cinfo->scale_num = scalenum;
cinfo->scale_denom = 8;
}
/* Compute actual output dimension for image returned by decoder */
jpeg_calc_output_dimensions(cinfo);
#if YMAGINE_DEBUG_JPEG
ALOGD("src=%dx%d@%d,%d dst=%dx%d@%d,%d",
srcrect.width, srcrect.height, srcrect.x, srcrect.y,
destrect.width, destrect.height, destrect.x, destrect.y);
ALOGD("size: %dx%d req: %dx%d %s -> scale: %d/%d output: %dx%d components: %d",
iwidth, iheight,
destrect.width, destrect.height,
Ymagine_scaleModeStr(options->scalemode),
cinfo->scale_num, cinfo->scale_denom,
cinfo->output_width, cinfo->output_height,
cinfo->output_components);
#endif
/* Scale the crop region to reflect scaling ratio applied by JPEG decoder */
if (cinfo->image_width != cinfo->output_width) {
srcrect.x = (srcrect.x * cinfo->output_width) / cinfo->image_width;
srcrect.width = (srcrect.width * cinfo->output_width) / cinfo->image_width;
}
if (cinfo->image_height != cinfo->output_height) {
srcrect.y = (srcrect.y * cinfo->output_height) / cinfo->image_height;
srcrect.height = (srcrect.height * cinfo->output_height) / cinfo->image_height;
}
/* Number of scan lines to handle per pass. Making it larger actually doesn't help much */
row_stride = cinfo->output_width * cinfo->output_components;
scanlines = (32 * 1024) / row_stride;
if (scanlines < 1) {
scanlines = 1;
}
if (scanlines > cinfo->output_height) {
scanlines = cinfo->output_height;
}
#if YMAGINE_DEBUG_JPEG
ALOGD("BITMAP @(%d,%d) %dx%d bpp=%d -> @(%dx%d) %dx%d (%d lines)",
srcrect.x, srcrect.y, srcrect.width, srcrect.height, JpegPixelSize(cinfo->out_color_space),
destrect.x, destrect.y, destrect.width, destrect.height,
scanlines);
#endif
/* Resize encoder */
if (cinfoout != NULL) {
cinfoout->image_width = destrect.width;
cinfoout->image_height = destrect.height;
jpeg_start_compress(cinfoout, TRUE);
if (copyoption != JCOPYOPT_NONE) {
/* Copy to the output file any extra markers that we want to preserve */
jcopy_markers_execute(cinfo, cinfoout, copyoption);
}
}
/* Resize target bitmap */
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);
}
}
if (!jpeg_start_decompress(cinfo)) {
if (cinfoout != NULL) {
jpeg_abort_compress(cinfoout);
}
return 0;
}
buffer = (JSAMPARRAY) (*cinfo->mem->alloc_sarray)((j_common_ptr) cinfo, JPOOL_IMAGE,
row_stride, scanlines);
if (buffer == NULL) {
if (cinfoout != NULL) {
jpeg_abort_compress(cinfoout);
}
jpeg_abort_decompress(cinfo);
return 0;
}
totallines = 0;
transformer = TransformerCreate();
if (transformer != NULL) {
TransformerSetScale(transformer,
cinfo->output_width, cinfo->output_height,
destrect.width, destrect.height);
TransformerSetRegion(transformer,
srcrect.x, srcrect.y, srcrect.width, srcrect.height);
if (vbitmap != NULL) {
TransformerSetMode(transformer, JpegPixelMode(cinfo->out_color_space), VbitmapColormode(vbitmap));
TransformerSetBitmap(transformer, vbitmap, destrect.x, destrect.y);
} else {
TransformerSetMode(transformer, JpegPixelMode(cinfo->out_color_space),
JpegPixelMode(cinfoout->in_color_space));
TransformerSetWriter(transformer, JpegWriter, cinfoout);
}
TransformerSetShader(transformer, shader);
TransformerSetSharpen(transformer, sharpen);
}
while (transformer != NULL && cinfo->output_scanline < cinfo->output_height) {
nlines = jpeg_read_scanlines(cinfo, buffer, scanlines);
if (nlines <= 0) {
/* Decoding error */
ALOGD("decoding error (nlines=%d)", nlines);
break;
}
for (j = 0; j < nlines; j++) {
if (TransformerPush(transformer, (const char*) buffer[j]) != YMAGINE_OK) {
TransformerRelease(transformer);
transformer = NULL;
break;
}
totallines++;
}
}
/* Clean up */
if (transformer != NULL) {
TransformerRelease(transformer);
}
if (cinfo->output_scanline > 0 && cinfo->output_scanline == cinfo->output_height) {
/* Do normal cleanup if whole image has been read and decoded */
jpeg_finish_decompress(cinfo);
if (cinfoout != NULL) {
jpeg_finish_compress(cinfoout);
}
}
else {
/* else early abort */
jpeg_abort_decompress(cinfo);
if (cinfoout != NULL) {
jpeg_abort_compress(cinfoout);
}
totallines = 0;
}
return totallines;
}
