Alien-FreeImage
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src/Source/LibJPEG/jcomapi.c view on Meta::CPAN
GLOBAL(void)
jpeg_abort (j_common_ptr cinfo)
{
int pool;
/* Do nothing if called on a not-initialized or destroyed JPEG object. */
if (cinfo->mem == NULL)
return;
/* Releasing pools in reverse order might help avoid fragmentation
* with some (brain-damaged) malloc libraries.
*/
for (pool = JPOOL_NUMPOOLS-1; pool > JPOOL_PERMANENT; pool--) {
(*cinfo->mem->free_pool) (cinfo, pool);
}
/* Reset overall state for possible reuse of object */
if (cinfo->is_decompressor) {
cinfo->global_state = DSTATE_START;
/* Try to keep application from accessing now-deleted marker list.
src/Source/LibJPEG/jmemmgr.c view on Meta::CPAN
* Close up shop entirely.
* Note that this cannot be called unless cinfo->mem is non-NULL.
*/
METHODDEF(void)
self_destruct (j_common_ptr cinfo)
{
int pool;
/* Close all backing store, release all memory.
* Releasing pools in reverse order might help avoid fragmentation
* with some (brain-damaged) malloc libraries.
*/
for (pool = JPOOL_NUMPOOLS-1; pool >= JPOOL_PERMANENT; pool--) {
free_pool(cinfo, pool);
}
/* Release the memory manager control block too. */
jpeg_free_small(cinfo, (void *) cinfo->mem, SIZEOF(my_memory_mgr));
cinfo->mem = NULL; /* ensures I will be called only once */
src/Source/LibPNG/libpng-manual.txt view on Meta::CPAN
set up these callbacks with png_set_progressive_read_fn(). You don't
have to worry about the input/output functions of libpng, as you are
giving the library the data directly in png_process_data(). I will
assume that you have read the section on reading PNG files above,
so I will only highlight the differences (although I will show
all of the code).
png_structp png_ptr;
png_infop info_ptr;
/* An example code fragment of how you would
initialize the progressive reader in your
application. */
int
initialize_png_reader()
{
png_ptr = png_create_read_struct
(PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
user_error_fn, user_warning_fn);
if (!png_ptr)
src/Source/LibPNG/libpng-manual.txt view on Meta::CPAN
which will return a void pointer, which you have
to cast appropriately.
*/
png_set_progressive_read_fn(png_ptr, (void *)user_ptr,
info_callback, row_callback, end_callback);
return 0;
}
/* A code fragment that you call as you receive blocks
of data */
int
process_data(png_bytep buffer, png_uint_32 length)
{
if (setjmp(png_jmpbuf(png_ptr)))
{
png_destroy_read_struct(&png_ptr, &info_ptr,
(png_infopp)NULL);
return (ERROR);
}
src/Source/LibPNG/libpng.3 view on Meta::CPAN
set up these callbacks with png_set_progressive_read_fn(). You don't
have to worry about the input/output functions of libpng, as you are
giving the library the data directly in png_process_data(). I will
assume that you have read the section on reading PNG files above,
so I will only highlight the differences (although I will show
all of the code).
png_structp png_ptr;
png_infop info_ptr;
/* An example code fragment of how you would
initialize the progressive reader in your
application. */
int
initialize_png_reader()
{
png_ptr = png_create_read_struct
(PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
user_error_fn, user_warning_fn);
if (!png_ptr)
src/Source/LibPNG/libpng.3 view on Meta::CPAN
which will return a void pointer, which you have
to cast appropriately.
*/
png_set_progressive_read_fn(png_ptr, (void *)user_ptr,
info_callback, row_callback, end_callback);
return 0;
}
/* A code fragment that you call as you receive blocks
of data */
int
process_data(png_bytep buffer, png_uint_32 length)
{
if (setjmp(png_jmpbuf(png_ptr)))
{
png_destroy_read_struct(&png_ptr, &info_ptr,
(png_infopp)NULL);
return (ERROR);
}
src/Source/LibWebP/ChangeLog view on Meta::CPAN
46db286 idec: add some missing casts
b524e33 ErrorStatusLossless: correct return type
cb261f7 fix a descaling bug for vertical/horizontal U/V interpolation
bcb3955 Merge changes I48968468,I181bc736
73f5213 gif2webp: Add a mixed compression mode
6198715 demux: split chunk parsing from ParseVP8X
d2e3f4e demux: add a tail pointer for chunks
87cffcc demux: cosmetics: s/has_frames/is_animation/
e18e667 demux: strictly enforce the animation flag
c4f39f4 demux: cosmetics: remove a useless break
61cb884 demux: (non-exp) fail if the fragmented flag is set
ff379db few % speedup of lossless encoding
df3649a remove all disabled code related to P-frames
6d0cb3d Merge "gif2webp: kmin = 0 should suppress key-frame addition."
3655598 gif2webp: kmin = 0 should suppress key-frame addition.
7708e60 Merge "detect flatness in blocks and favor DC prediction"
06b1503 Merge "add comment about the kLevelsFromDelta[][] LUT generation"
5935259 add comment about the kLevelsFromDelta[][] LUT generation
e3312ea detect flatness in blocks and favor DC prediction
ebc9b1e Merge "VPLBitReader bugfix: Catch error if bit_pos > LBITS too."
96ad0e0 VPLBitReader bugfix: Catch error if bit_pos > LBITS too.
src/Source/LibWebP/ChangeLog view on Meta::CPAN
de4d4ad VP8EncIterator clean-up
7bbe952 Merge "cosmetics: thread.c: drop a redundant comment"
da41148 cosmetics: thread.c: drop a redundant comment
feb4b6e thread.h: #ifdef when checking WEBP_USE_THREAD
8924a3a thread.c: drop WebPWorker prefix from static funcs
1aed8f2 Merge "fix indent"
4038ed1 fix indent
1693fd9 Demux: A new state WEBP_DEMUX_PARSE_ERROR
8dcae8b fix rescaling-with-alpha inaccuracy
11249ab Merge changes I9b4dc36c,I4e0eef4d
52508a1 Mux: support parsing unknown chunks within a frame/fragment.
05db057 WebPMuxSetChunk: remove unused variable
8ba1bf6 Stricter check for presence of alpha when writing lossless images
a03c351 Demux: WebPIterator now also denotes if the frame has alpha.
6df743a Decoder: handle fragments case correctly too.
faa4b07 Support for unknown chunks in mux library
7d60bbc Speed up HashChainFindCopy function.
6674014 Speedup Alpha plane encoding.
b7346a1 0.1 % speedup to decoding
c606182 webp-container-spec: Tighten language added by last
a34a502 pngdec: output error messages from libpng
e84c625 Merge "Detect canvas and image size mismatch in decoder."
f626fe2 Detect canvas and image size mismatch in decoder.
f5fbdee demux: stricter image bounds check
30c8158 add extra assert in Huffman decode code
src/Source/LibWebP/ChangeLog view on Meta::CPAN
5621934 Merge "build: fix install race on shared headers" into 0.3.0
70809d8 Merge "bump version to 0.3.0" into 0.3.0
d851cd1 demux: make the parse a bit more strict
28bb410 update NEWS
cef9388 bump version to 0.3.0
9048494 build: fix install race on shared headers
1e67e8e README updates
42b611a Merge "configure: drop experimental from mux/demux" into 0.3.0
096a8e3 Merge "vwebp: add color profile support" into 0.3.0
ddfee5d vwebp: add color profile support
0d6927d Merge "Mark fragment options as experimental in webpmux" into 0.3.0
5dbd403 Mark fragment options as experimental in webpmux
a0a6648 configure: drop experimental from mux/demux
ee65bad Merge "add support for BITS > 32" into 0.3.0
744930d add support for BITS > 32
7dd288f cwebp: fix build
19a8dd0 Merge "Makefile.vc: add vwebp.exe target" into 0.3.0
50eedda Merge "examples: normalize icc related program arguments" into 0.3.0
757f637 Merge "Makefile.vc: add libwebpdecoder target" into 0.3.0
b65c4b7 Makefile.vc: add libwebpdecoder target
f8db7b4 Merge "vwebp: replace doubles w/floats where appropriate" into 0.3.0
d99aa56 Makefile.vc: add vwebp.exe target
013023e vwebp: replace doubles w/floats where appropriate
9b3db89 README.mux: add version reference
7b6a26c Merge "cwebp: output metadata statistics" into 0.3.0
d8dc72a examples: normalize icc related program arguments
7bfc905 Merge "make alpha unfilter work in-place" into 0.3.0
0037b2d Merge "add LUT-free reference code for YUV->RGB conversion." into 0.3.0
166bf74 Merge "demux: disable fragment parsing" into 0.3.0
126974b add LUT-free reference code for YUV->RGB conversion.
0aef3eb make alpha unfilter work in-place
14ef500 Merge "Remove 'status: experimental' from container spec" into 0.3.0
d40c98e Merge "webpmux binary: tiny style fix" into 0.3.0
0bc4268 cwebp: output metadata statistics
bc03980 Merge "autoconf: normalize experimental define" into 0.3.0
d1e21b1 Remove 'status: experimental' from container spec
7681bb9 webpmux binary: tiny style fix
a3dd3d0 avoid installing example_util.h
252320e demux: disable fragment parsing
537bde0 autoconf: normalize experimental define
5e338e0 Merge changes I33e8a613,I8e8a7b44 into 0.3.0
d9d0ea1 Merge changes If21e3ec7,I991fc30b into 0.3.0
627f5ca automake: add reference to libwebp for mux/demux
eef73d0 don't consolidate proba stats too often
05ec4cc libwebp{,decoder}.pc: add pthread flags
1bfcf5b add libwebpmux.pc
26ca843 add libwebpdemux.pc
69e2590 Merge "Tune Lossless compression for lower qualities."
0478b5d Tune Lossless compression for lower qualities.
src/Source/LibWebP/ChangeLog view on Meta::CPAN
22a0fd9 Add NEON version of FTransformWHT
fa30c86 Update mux code to match the spec wrt animation
d9c5fbe by-pass Analysis pass in case segments=1
d2ad445 Merge changes Ibeccffc3,Id1585b16
5c8be25 Merge "Chunk fourCCs for XMP/EXIF"
a00a3da Use 'frgm' instead of 'tile' in webpmux parameters
81b8a74 Design change in ANMF and FRGM chunks:
f903cba Chunk fourCCs for XMP/EXIF
812933d Tune performance of HistogramCombine
52ad197 Animation specification in container spec
001b930 Image fragment specification in container spec
391f9db Ordering of description of bits in container spec
d573577 Metadata specification in container spec
1c4609b Merge commit 'v0.2.1'
0ca584c Merge "Color profile specification in container spec"
e8b41ad add NEON asm version for WHT inverse transform
af6f0db Color profile specification in container spec
a61a824 Merge "Add NULL check in chunk APIs"
0e8b7ee fix WebPPictureView() unassigned strides
75e5f17 ARM/NEON: 30% encoding speed-up
02b4356 Add NULL check in chunk APIs
src/Source/LibWebP/README.mux view on Meta::CPAN
WebPDemuxer* demux = WebPDemux(&webp_data);
uint32_t width = WebPDemuxGetI(demux, WEBP_FF_CANVAS_WIDTH);
uint32_t height = WebPDemuxGetI(demux, WEBP_FF_CANVAS_HEIGHT);
// ... (Get information about the features present in the WebP file).
uint32_t flags = WebPDemuxGetI(demux, WEBP_FF_FORMAT_FLAGS);
// ... (Iterate over all frames).
WebPIterator iter;
if (WebPDemuxGetFrame(demux, 1, &iter)) {
do {
// ... (Consume 'iter'; e.g. Decode 'iter.fragment' with WebPDecode(),
// ... and get other frame properties like width, height, offsets etc.
// ... see 'struct WebPIterator' below for more info).
} while (WebPDemuxNextFrame(&iter));
WebPDemuxReleaseIterator(&iter);
}
// ... (Extract metadata).
WebPChunkIterator chunk_iter;
if (flags & ICCP_FLAG) WebPDemuxGetChunk(demux, "ICCP", 1, &chunk_iter);
// ... (Consume the ICC profile in 'chunk_iter.chunk').
src/Source/LibWebP/src/dec/dec.webp.c view on Meta::CPAN
int* const has_animation,
int* const format,
WebPHeaderStructure* const headers) {
int canvas_width = 0;
int canvas_height = 0;
int image_width = 0;
int image_height = 0;
int found_riff = 0;
int found_vp8x = 0;
int animation_present = 0;
int fragments_present = 0;
const int have_all_data = (headers != NULL) ? headers->have_all_data : 0;
VP8StatusCode status;
WebPHeaderStructure hdrs;
if (data == NULL || data_size < RIFF_HEADER_SIZE) {
return VP8_STATUS_NOT_ENOUGH_DATA;
}
memset(&hdrs, 0, sizeof(hdrs));
hdrs.data = data;
src/Source/LibWebP/src/dec/dec.webp.c view on Meta::CPAN
// Skip over VP8X.
{
uint32_t flags = 0;
status = ParseVP8X(&data, &data_size, &found_vp8x,
&canvas_width, &canvas_height, &flags);
if (status != VP8_STATUS_OK) {
return status; // Wrong VP8X / insufficient data.
}
animation_present = !!(flags & ANIMATION_FLAG);
fragments_present = !!(flags & FRAGMENTS_FLAG);
if (!found_riff && found_vp8x) {
// Note: This restriction may be removed in the future, if it becomes
// necessary to send VP8X chunk to the decoder.
return VP8_STATUS_BITSTREAM_ERROR;
}
if (has_alpha != NULL) *has_alpha = !!(flags & ALPHA_FLAG);
if (has_animation != NULL) *has_animation = animation_present;
if (format != NULL) *format = 0; // default = undefined
image_width = canvas_width;
image_height = canvas_height;
if (found_vp8x && (animation_present || fragments_present) &&
headers == NULL) {
status = VP8_STATUS_OK;
goto ReturnWidthHeight; // Just return features from VP8X header.
}
}
if (data_size < TAG_SIZE) {
status = VP8_STATUS_NOT_ENOUGH_DATA;
goto ReturnWidthHeight;
}
src/Source/LibWebP/src/dec/dec.webp.c view on Meta::CPAN
// Skip over VP8/VP8L header.
status = ParseVP8Header(&data, &data_size, have_all_data, hdrs.riff_size,
&hdrs.compressed_size, &hdrs.is_lossless);
if (status != VP8_STATUS_OK) {
goto ReturnWidthHeight; // Wrong VP8/VP8L chunk-header / insufficient data.
}
if (hdrs.compressed_size > MAX_CHUNK_PAYLOAD) {
return VP8_STATUS_BITSTREAM_ERROR;
}
if (format != NULL && !(animation_present || fragments_present)) {
*format = hdrs.is_lossless ? 2 : 1;
}
if (!hdrs.is_lossless) {
if (data_size < VP8_FRAME_HEADER_SIZE) {
status = VP8_STATUS_NOT_ENOUGH_DATA;
goto ReturnWidthHeight;
}
// Validates raw VP8 data.
if (!VP8GetInfo(data, data_size, (uint32_t)hdrs.compressed_size,
src/Source/LibWebP/src/demux/demux.demux.c view on Meta::CPAN
size_t size_;
} ChunkData;
typedef struct Frame {
int x_offset_, y_offset_;
int width_, height_;
int has_alpha_;
int duration_;
WebPMuxAnimDispose dispose_method_;
WebPMuxAnimBlend blend_method_;
int is_fragment_; // this is a frame fragment (and not a full frame).
int frame_num_; // the referent frame number for use in assembling fragments.
int complete_; // img_components_ contains a full image.
ChunkData img_components_[2]; // 0=VP8{,L} 1=ALPH
struct Frame* next_;
} Frame;
typedef struct Chunk {
ChunkData data_;
struct Chunk* next_;
} Chunk;
src/Source/LibWebP/src/demux/demux.demux.c view on Meta::CPAN
if (dmux->canvas_width_ <= 0 || dmux->canvas_height_ <= 0) return 0;
if (dmux->state_ == WEBP_DEMUX_DONE && frame == NULL) return 0;
if (frame->width_ <= 0 || frame->height_ <= 0) return 0;
return 1;
}
// If 'exact' is true, check that the image resolution matches the canvas.
// If 'exact' is false, check that the x/y offsets do not exceed the canvas.
// TODO(jzern): this is insufficient in the fragmented image case if the
// expectation is that the fragments completely cover the canvas.
static int CheckFrameBounds(const Frame* const frame, int exact,
int canvas_width, int canvas_height) {
if (exact) {
if (frame->x_offset_ != 0 || frame->y_offset_ != 0) {
return 0;
}
if (frame->width_ != canvas_width || frame->height_ != canvas_height) {
return 0;
}
} else {
if (frame->x_offset_ < 0 || frame->y_offset_ < 0) return 0;
if (frame->width_ + frame->x_offset_ > canvas_width) return 0;
if (frame->height_ + frame->y_offset_ > canvas_height) return 0;
}
return 1;
}
static int IsValidExtendedFormat(const WebPDemuxer* const dmux) {
const int is_animation = !!(dmux->feature_flags_ & ANIMATION_FLAG);
const int is_fragmented = !!(dmux->feature_flags_ & FRAGMENTS_FLAG);
const Frame* f = dmux->frames_;
if (dmux->state_ == WEBP_DEMUX_PARSING_HEADER) return 1;
if (dmux->canvas_width_ <= 0 || dmux->canvas_height_ <= 0) return 0;
if (dmux->loop_count_ < 0) return 0;
if (dmux->state_ == WEBP_DEMUX_DONE && dmux->frames_ == NULL) return 0;
if (is_fragmented) return 0;
while (f != NULL) {
const int cur_frame_set = f->frame_num_;
int frame_count = 0, fragment_count = 0;
// Check frame properties and if the image is composed of fragments that
// each fragment came from a fragment.
for (; f != NULL && f->frame_num_ == cur_frame_set; f = f->next_) {
const ChunkData* const image = f->img_components_;
const ChunkData* const alpha = f->img_components_ + 1;
if (is_fragmented && !f->is_fragment_) return 0;
if (!is_fragmented && f->is_fragment_) return 0;
if (!is_animation && f->frame_num_ > 1) return 0;
if (f->complete_) {
if (alpha->size_ == 0 && image->size_ == 0) return 0;
// Ensure alpha precedes image bitstream.
if (alpha->size_ > 0 && alpha->offset_ > image->offset_) {
return 0;
}
if (f->width_ <= 0 || f->height_ <= 0) return 0;
src/Source/LibWebP/src/demux/demux.demux.c view on Meta::CPAN
// Ensure alpha precedes image bitstream.
if (alpha->size_ > 0 && image->size_ > 0 &&
alpha->offset_ > image->offset_) {
return 0;
}
// There shouldn't be any frames after an incomplete one.
if (f->next_ != NULL) return 0;
}
if (f->width_ > 0 && f->height_ > 0 &&
!CheckFrameBounds(f, !(is_animation || is_fragmented),
dmux->canvas_width_, dmux->canvas_height_)) {
return 0;
}
fragment_count += f->is_fragment_;
++frame_count;
}
if (!is_fragmented && frame_count > 1) return 0;
if (fragment_count > 0 && frame_count != fragment_count) return 0;
}
return 1;
}
// -----------------------------------------------------------------------------
// WebPDemuxer object
static void InitDemux(WebPDemuxer* const dmux, const MemBuffer* const mem) {
dmux->state_ = WEBP_DEMUX_PARSING_HEADER;
dmux->loop_count_ = 1;
src/Source/LibWebP/src/demux/demux.demux.c view on Meta::CPAN
case WEBP_FF_BACKGROUND_COLOR: return dmux->bgcolor_;
case WEBP_FF_FRAME_COUNT: return (uint32_t)dmux->num_frames_;
}
return 0;
}
// -----------------------------------------------------------------------------
// Frame iteration
// Find the first 'frame_num' frame. There may be multiple such frames in a
// fragmented frame.
static const Frame* GetFrame(const WebPDemuxer* const dmux, int frame_num) {
const Frame* f;
for (f = dmux->frames_; f != NULL; f = f->next_) {
if (frame_num == f->frame_num_) break;
}
return f;
}
// Returns fragment 'fragment_num' and the total count.
static const Frame* GetFragment(
const Frame* const frame_set, int fragment_num, int* const count) {
const int this_frame = frame_set->frame_num_;
const Frame* f = frame_set;
const Frame* fragment = NULL;
int total;
for (total = 0; f != NULL && f->frame_num_ == this_frame; f = f->next_) {
if (++total == fragment_num) fragment = f;
}
*count = total;
return fragment;
}
static const uint8_t* GetFramePayload(const uint8_t* const mem_buf,
const Frame* const frame,
size_t* const data_size) {
*data_size = 0;
if (frame != NULL) {
const ChunkData* const image = frame->img_components_;
const ChunkData* const alpha = frame->img_components_ + 1;
size_t start_offset = image->offset_;
src/Source/LibWebP/src/demux/demux.demux.c view on Meta::CPAN
*data_size += alpha->size_ + inter_size;
}
return mem_buf + start_offset;
}
return NULL;
}
// Create a whole 'frame' from VP8 (+ alpha) or lossless.
static int SynthesizeFrame(const WebPDemuxer* const dmux,
const Frame* const first_frame,
int fragment_num, WebPIterator* const iter) {
const uint8_t* const mem_buf = dmux->mem_.buf_;
int num_fragments;
size_t payload_size = 0;
const Frame* const fragment =
GetFragment(first_frame, fragment_num, &num_fragments);
const uint8_t* const payload =
GetFramePayload(mem_buf, fragment, &payload_size);
if (payload == NULL) return 0;
assert(first_frame != NULL);
iter->frame_num = first_frame->frame_num_;
iter->num_frames = dmux->num_frames_;
iter->fragment_num = fragment_num;
iter->num_fragments = num_fragments;
iter->x_offset = fragment->x_offset_;
iter->y_offset = fragment->y_offset_;
iter->width = fragment->width_;
iter->height = fragment->height_;
iter->has_alpha = fragment->has_alpha_;
iter->duration = fragment->duration_;
iter->dispose_method = fragment->dispose_method_;
iter->blend_method = fragment->blend_method_;
iter->complete = fragment->complete_;
iter->fragment.bytes = payload;
iter->fragment.size = payload_size;
return 1;
}
static int SetFrame(int frame_num, WebPIterator* const iter) {
const Frame* frame;
const WebPDemuxer* const dmux = (WebPDemuxer*)iter->private_;
if (dmux == NULL || frame_num < 0) return 0;
if (frame_num > dmux->num_frames_) return 0;
if (frame_num == 0) frame_num = dmux->num_frames_;
src/Source/LibWebP/src/demux/demux.demux.c view on Meta::CPAN
if (iter == NULL) return 0;
return SetFrame(iter->frame_num + 1, iter);
}
int WebPDemuxPrevFrame(WebPIterator* iter) {
if (iter == NULL) return 0;
if (iter->frame_num <= 1) return 0;
return SetFrame(iter->frame_num - 1, iter);
}
int WebPDemuxSelectFragment(WebPIterator* iter, int fragment_num) {
if (iter != NULL && iter->private_ != NULL && fragment_num > 0) {
const WebPDemuxer* const dmux = (WebPDemuxer*)iter->private_;
const Frame* const frame = GetFrame(dmux, iter->frame_num);
if (frame == NULL) return 0;
return SynthesizeFrame(dmux, frame, fragment_num, iter);
}
return 0;
}
void WebPDemuxReleaseIterator(WebPIterator* iter) {
(void)iter;
}
// -----------------------------------------------------------------------------
// Chunk iteration
src/Source/LibWebP/src/mux/mux.muxedit.c view on Meta::CPAN
SWITCH_ID_LIST(IDX_VP8X, &mux->vp8x_);
SWITCH_ID_LIST(IDX_ICCP, &mux->iccp_);
SWITCH_ID_LIST(IDX_ANIM, &mux->anim_);
SWITCH_ID_LIST(IDX_EXIF, &mux->exif_);
SWITCH_ID_LIST(IDX_XMP, &mux->xmp_);
SWITCH_ID_LIST(IDX_UNKNOWN, &mux->unknown_);
return err;
}
#undef SWITCH_ID_LIST
// Create data for frame/fragment given image data, offsets and duration.
static WebPMuxError CreateFrameFragmentData(
int width, int height, const WebPMuxFrameInfo* const info, int is_frame,
WebPData* const frame_frgm) {
uint8_t* frame_frgm_bytes;
const size_t frame_frgm_size = kChunks[is_frame ? IDX_ANMF : IDX_FRGM].size;
assert(width > 0 && height > 0 && info->duration >= 0);
assert(info->dispose_method == (info->dispose_method & 1));
// Note: assertion on upper bounds is done in PutLE24().
src/Source/LibWebP/src/mux/mux.muxedit.c view on Meta::CPAN
if (tmp.x_offset < 0 || tmp.x_offset >= MAX_POSITION_OFFSET ||
tmp.y_offset < 0 || tmp.y_offset >= MAX_POSITION_OFFSET ||
(tmp.duration < 0 || tmp.duration >= MAX_DURATION) ||
tmp.dispose_method != (tmp.dispose_method & 1)) {
err = WEBP_MUX_INVALID_ARGUMENT;
goto Err;
}
err = CreateFrameFragmentData(wpi.width_, wpi.height_, &tmp, is_frame,
&frame_frgm);
if (err != WEBP_MUX_OK) goto Err;
// Add frame/fragment chunk (with copy_data = 1).
err = AddDataToChunkList(&frame_frgm, 1, tag, &wpi.header_);
WebPDataClear(&frame_frgm); // frame_frgm owned by wpi.header_ now.
if (err != WEBP_MUX_OK) goto Err;
}
// Add this WebPMuxImage to mux.
err = MuxImagePush(&wpi, &mux->images_);
if (err != WEBP_MUX_OK) goto Err;
// All is well.
src/Source/LibWebP/src/mux/mux.muxedit.c view on Meta::CPAN
wpi = mux->images_;
assert(wpi != NULL);
assert(wpi->img_ != NULL);
if (wpi->next_ != NULL) {
int max_x = 0;
int max_y = 0;
int64_t image_area = 0;
// if we have a chain of wpi's, header_ is necessarily set
assert(wpi->header_ != NULL);
// Aggregate the bounding box for animation frames & fragmented images.
for (; wpi != NULL; wpi = wpi->next_) {
int x_offset = 0, y_offset = 0, duration = 0, w = 0, h = 0;
const WebPMuxError err = GetImageInfo(wpi, &x_offset, &y_offset,
&duration, &w, &h);
const int max_x_pos = x_offset + w;
const int max_y_pos = y_offset + h;
if (err != WEBP_MUX_OK) return err;
assert(x_offset < MAX_POSITION_OFFSET);
assert(y_offset < MAX_POSITION_OFFSET);
if (max_x_pos > max_x) max_x = max_x_pos;
if (max_y_pos > max_y) max_y = max_y_pos;
image_area += w * h;
}
*width = max_x;
*height = max_y;
// Crude check to validate that there are no image overlaps/holes for
// fragmented images. Check that the aggregated image area for individual
// fragments exactly matches the image area of the constructed canvas.
// However, the area-match is necessary but not sufficient condition.
if ((flags & FRAGMENTS_FLAG) && (image_area != (max_x * max_y))) {
*width = 0;
*height = 0;
return WEBP_MUX_INVALID_ARGUMENT;
}
} else {
// For a single image, canvas dimensions are same as image dimensions.
*width = wpi->width_;
*height = wpi->height_;
src/Source/LibWebP/src/mux/mux.muxedit.c view on Meta::CPAN
flags |= ICCP_FLAG;
}
if (mux->exif_ != NULL && mux->exif_->data_.bytes != NULL) {
flags |= EXIF_FLAG;
}
if (mux->xmp_ != NULL && mux->xmp_->data_.bytes != NULL) {
flags |= XMP_FLAG;
}
if (images->header_ != NULL) {
if (images->header_->tag_ == kChunks[IDX_FRGM].tag) {
// This is a fragmented image.
flags |= FRAGMENTS_FLAG;
} else if (images->header_->tag_ == kChunks[IDX_ANMF].tag) {
// This is an image with animation.
flags |= ANIMATION_FLAG;
}
}
if (MuxImageCount(images, WEBP_CHUNK_ALPHA) > 0) {
flags |= ALPHA_FLAG; // Some images have an alpha channel.
}
src/Source/LibWebP/src/mux/mux.muxedit.c view on Meta::CPAN
PutLE32(data + 0, flags); // VP8X chunk flags.
PutLE24(data + 4, width - 1); // canvas width.
PutLE24(data + 7, height - 1); // canvas height.
return MuxSet(mux, kChunks[IDX_VP8X].tag, 1, &vp8x, 1);
}
// Cleans up 'mux' by removing any unnecessary chunks.
static WebPMuxError MuxCleanup(WebPMux* const mux) {
int num_frames;
int num_fragments;
int num_anim_chunks;
// If we have an image with a single fragment or frame, and its rectangle
// covers the whole canvas, convert it to a non-animated non-fragmented image
// (to avoid writing FRGM/ANMF chunk unnecessarily).
WebPMuxError err = WebPMuxNumChunks(mux, kChunks[IDX_ANMF].id, &num_frames);
if (err != WEBP_MUX_OK) return err;
err = WebPMuxNumChunks(mux, kChunks[IDX_FRGM].id, &num_fragments);
if (err != WEBP_MUX_OK) return err;
if (num_frames == 1 || num_fragments == 1) {
WebPMuxImage* frame_frag;
err = MuxImageGetNth((const WebPMuxImage**)&mux->images_, 1, &frame_frag);
assert(err == WEBP_MUX_OK); // We know that one frame/fragment does exist.
assert(frame_frag != NULL);
if (frame_frag->header_ != NULL &&
((mux->canvas_width_ == 0 && mux->canvas_height_ == 0) ||
(frame_frag->width_ == mux->canvas_width_ &&
frame_frag->height_ == mux->canvas_height_))) {
assert(frame_frag->header_->tag_ == kChunks[IDX_ANMF].tag ||
frame_frag->header_->tag_ == kChunks[IDX_FRGM].tag);
ChunkDelete(frame_frag->header_); // Removes ANMF/FRGM chunk.
frame_frag->header_ = NULL;
num_frames = 0;
num_fragments = 0;
}
}
// Remove ANIM chunk if this is a non-animated image.
err = WebPMuxNumChunks(mux, kChunks[IDX_ANIM].id, &num_anim_chunks);
if (err != WEBP_MUX_OK) return err;
if (num_anim_chunks >= 1 && num_frames == 0) {
err = MuxDeleteAllNamedData(mux, kChunks[IDX_ANIM].tag);
if (err != WEBP_MUX_OK) return err;
}
return WEBP_MUX_OK;
src/Source/LibWebP/src/mux/mux.muxinternal.c view on Meta::CPAN
}
return WEBP_MUX_OK;
}
WebPMuxError MuxValidate(const WebPMux* const mux) {
int num_iccp;
int num_exif;
int num_xmp;
int num_anim;
int num_frames;
int num_fragments;
int num_vp8x;
int num_images;
int num_alpha;
uint32_t flags;
WebPMuxError err;
// Verify mux is not NULL.
if (mux == NULL) return WEBP_MUX_INVALID_ARGUMENT;
// Verify mux has at least one image.
src/Source/LibWebP/src/mux/mux.muxinternal.c view on Meta::CPAN
const int has_animation = !!(flags & ANIMATION_FLAG);
if (has_animation && (num_anim == 0 || num_frames == 0)) {
return WEBP_MUX_INVALID_ARGUMENT;
}
if (!has_animation && (num_anim == 1 || num_frames > 0)) {
return WEBP_MUX_INVALID_ARGUMENT;
}
}
// Fragmentation: FRAGMENTS_FLAG and FRGM chunk(s) are consistent.
err = ValidateChunk(mux, IDX_FRGM, FRAGMENTS_FLAG, flags, -1, &num_fragments);
if (err != WEBP_MUX_OK) return err;
// Verify either VP8X chunk is present OR there is only one elem in
// mux->images_.
err = ValidateChunk(mux, IDX_VP8X, NO_FLAG, flags, 1, &num_vp8x);
if (err != WEBP_MUX_OK) return err;
err = ValidateChunk(mux, IDX_VP8, NO_FLAG, flags, -1, &num_images);
if (err != WEBP_MUX_OK) return err;
if (num_vp8x == 0 && num_images != 1) return WEBP_MUX_INVALID_ARGUMENT;
src/Source/LibWebP/src/mux/mux.muxinternal.c view on Meta::CPAN
} else {
// VP8X chunk is not present, so ALPH chunks should NOT be present either.
err = WebPMuxNumChunks(mux, WEBP_CHUNK_ALPHA, &num_alpha);
if (err != WEBP_MUX_OK) return err;
if (num_alpha > 0) return WEBP_MUX_INVALID_ARGUMENT;
}
} else { // Mux doesn't need alpha. So, ALPHA_FLAG should NOT be present.
if (flags & ALPHA_FLAG) return WEBP_MUX_INVALID_ARGUMENT;
}
// num_fragments & num_images are consistent.
if (num_fragments > 0 && num_images != num_fragments) {
return WEBP_MUX_INVALID_ARGUMENT;
}
return WEBP_MUX_OK;
}
#undef NO_FLAG
//------------------------------------------------------------------------------
src/Source/LibWebP/src/mux/mux.muxread.c view on Meta::CPAN
return NULL;
}
//------------------------------------------------------------------------------
// Get API(s).
// Validates that the given mux has a single image.
static WebPMuxError ValidateForSingleImage(const WebPMux* const mux) {
const int num_images = MuxImageCount(mux->images_, WEBP_CHUNK_IMAGE);
const int num_frames = MuxImageCount(mux->images_, WEBP_CHUNK_ANMF);
const int num_fragments = MuxImageCount(mux->images_, WEBP_CHUNK_FRGM);
if (num_images == 0) {
// No images in mux.
return WEBP_MUX_NOT_FOUND;
} else if (num_images == 1 && num_frames == 0 && num_fragments == 0) {
// Valid case (single image).
return WEBP_MUX_OK;
} else {
// Frame/Fragment case OR an invalid mux.
return WEBP_MUX_INVALID_ARGUMENT;
}
}
// Get the canvas width, height and flags after validating that VP8X/VP8/VP8L
// chunk and canvas size are valid.
src/Source/LibWebP/src/mux/mux.muxread.c view on Meta::CPAN
return SynthesizeBitstream(wpi, &info->bitstream);
}
static WebPMuxError MuxGetFrameFragmentInternal(const WebPMuxImage* const wpi,
WebPMuxFrameInfo* const frame) {
const int is_frame = (wpi->header_->tag_ == kChunks[IDX_ANMF].tag);
const CHUNK_INDEX idx = is_frame ? IDX_ANMF : IDX_FRGM;
const WebPData* frame_frgm_data;
if (!is_frame) return WEBP_MUX_INVALID_ARGUMENT;
assert(wpi->header_ != NULL); // Already checked by WebPMuxGetFrame().
// Get frame/fragment chunk.
frame_frgm_data = &wpi->header_->data_;
if (frame_frgm_data->size < kChunks[idx].size) return WEBP_MUX_BAD_DATA;
// Extract info.
frame->x_offset = 2 * GetLE24(frame_frgm_data->bytes + 0);
frame->y_offset = 2 * GetLE24(frame_frgm_data->bytes + 3);
if (is_frame) {
const uint8_t bits = frame_frgm_data->bytes[15];
frame->duration = GetLE24(frame_frgm_data->bytes + 12);
frame->dispose_method =
(bits & 1) ? WEBP_MUX_DISPOSE_BACKGROUND : WEBP_MUX_DISPOSE_NONE;
src/Source/LibWebP/src/webp/demux.h view on Meta::CPAN
uint32_t width = WebPDemuxGetI(demux, WEBP_FF_CANVAS_WIDTH);
uint32_t height = WebPDemuxGetI(demux, WEBP_FF_CANVAS_HEIGHT);
// ... (Get information about the features present in the WebP file).
uint32_t flags = WebPDemuxGetI(demux, WEBP_FF_FORMAT_FLAGS);
// ... (Iterate over all frames).
WebPIterator iter;
if (WebPDemuxGetFrame(demux, 1, &iter)) {
do {
// ... (Consume 'iter'; e.g. Decode 'iter.fragment' with WebPDecode(),
// ... and get other frame properties like width, height, offsets etc.
// ... see 'struct WebPIterator' below for more info).
} while (WebPDemuxNextFrame(&iter));
WebPDemuxReleaseIterator(&iter);
}
// ... (Extract metadata).
WebPChunkIterator chunk_iter;
if (flags & ICCP_FLAG) WebPDemuxGetChunk(demux, "ICCP", 1, &chunk_iter);
// ... (Consume the ICC profile in 'chunk_iter.chunk').
src/Source/LibWebP/src/webp/demux.h view on Meta::CPAN
// returned a state > WEBP_DEMUX_PARSING_HEADER.
WEBP_EXTERN(uint32_t) WebPDemuxGetI(
const WebPDemuxer* dmux, WebPFormatFeature feature);
//------------------------------------------------------------------------------
// Frame iteration.
struct WebPIterator {
int frame_num;
int num_frames; // equivalent to WEBP_FF_FRAME_COUNT.
int fragment_num;
int num_fragments;
int x_offset, y_offset; // offset relative to the canvas.
int width, height; // dimensions of this frame or fragment.
int duration; // display duration in milliseconds.
WebPMuxAnimDispose dispose_method; // dispose method for the frame.
int complete; // true if 'fragment' contains a full frame. partial images
// may still be decoded with the WebP incremental decoder.
WebPData fragment; // The frame or fragment given by 'frame_num' and
// 'fragment_num'.
int has_alpha; // True if the frame or fragment contains transparency.
WebPMuxAnimBlend blend_method; // Blend operation for the frame.
uint32_t pad[2]; // padding for later use.
void* private_; // for internal use only.
};
// Retrieves frame 'frame_number' from 'dmux'.
// 'iter->fragment' points to the first fragment on return from this function.
// Individual fragments may be extracted using WebPDemuxSelectFragment().
// Setting 'frame_number' equal to 0 will return the last frame of the image.
// Returns false if 'dmux' is NULL or frame 'frame_number' is not present.
// Call WebPDemuxReleaseIterator() when use of the iterator is complete.
// NOTE: 'dmux' must persist for the lifetime of 'iter'.
WEBP_EXTERN(int) WebPDemuxGetFrame(
const WebPDemuxer* dmux, int frame_number, WebPIterator* iter);
// Sets 'iter->fragment' to point to the next ('iter->frame_num' + 1) or
// previous ('iter->frame_num' - 1) frame. These functions do not loop.
// Returns true on success, false otherwise.
WEBP_EXTERN(int) WebPDemuxNextFrame(WebPIterator* iter);
WEBP_EXTERN(int) WebPDemuxPrevFrame(WebPIterator* iter);
// Sets 'iter->fragment' to reflect fragment number 'fragment_num'.
// Returns true if fragment 'fragment_num' is present, false otherwise.
WEBP_EXTERN(int) WebPDemuxSelectFragment(WebPIterator* iter, int fragment_num);
// Releases any memory associated with 'iter'.
// Must be called before any subsequent calls to WebPDemuxGetChunk() on the same
// iter. Also, must be called before destroying the associated WebPDemuxer with
// WebPDemuxDelete().
WEBP_EXTERN(void) WebPDemuxReleaseIterator(WebPIterator* iter);
//------------------------------------------------------------------------------
// Chunk iteration.
src/Source/LibWebP/src/webp/format_constants.h view on Meta::CPAN
#define RIFF_HEADER_SIZE 12 // Size of the RIFF header ("RIFFnnnnWEBP").
#define ANMF_CHUNK_SIZE 16 // Size of an ANMF chunk.
#define ANIM_CHUNK_SIZE 6 // Size of an ANIM chunk.
#define FRGM_CHUNK_SIZE 6 // Size of a FRGM chunk.
#define VP8X_CHUNK_SIZE 10 // Size of a VP8X chunk.
#define MAX_CANVAS_SIZE (1 << 24) // 24-bit max for VP8X width/height.
#define MAX_IMAGE_AREA (1ULL << 32) // 32-bit max for width x height.
#define MAX_LOOP_COUNT (1 << 16) // maximum value for loop-count
#define MAX_DURATION (1 << 24) // maximum duration
#define MAX_POSITION_OFFSET (1 << 24) // maximum frame/fragment x/y offset
// Maximum chunk payload is such that adding the header and padding won't
// overflow a uint32_t.
#define MAX_CHUNK_PAYLOAD (~0U - CHUNK_HEADER_SIZE - 1)
#endif /* WEBP_WEBP_FORMAT_CONSTANTS_H_ */
src/Source/LibWebP/src/webp/mux.h view on Meta::CPAN
#ifdef __cplusplus
extern "C" {
#endif
#define WEBP_MUX_ABI_VERSION 0x0103 // MAJOR(8b) + MINOR(8b)
//------------------------------------------------------------------------------
// Mux API
//
// This API allows manipulation of WebP container images containing features
// like color profile, metadata, animation and fragmented images.
//
// Code Example#1: Create a WebPMux object with image data, color profile and
// XMP metadata.
/*
int copy_data = 0;
WebPMux* mux = WebPMuxNew();
// ... (Prepare image data).
WebPMuxSetImage(mux, &image, copy_data);
// ... (Prepare ICCP color profile data).
WebPMuxSetChunk(mux, "ICCP", &icc_profile, copy_data);
src/Source/LibWebP/src/webp/mux.h view on Meta::CPAN
// WEBP_MUX_INVALID_ARGUMENT - if mux or fourcc is NULL
// or if fourcc corresponds to an image chunk.
// WEBP_MUX_NOT_FOUND - If mux does not contain a chunk with the given fourcc.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxDeleteChunk(
WebPMux* mux, const char fourcc[4]);
//------------------------------------------------------------------------------
// Images.
// Encapsulates data about a single frame/fragment.
struct WebPMuxFrameInfo {
WebPData bitstream; // image data: can be a raw VP8/VP8L bitstream
// or a single-image WebP file.
int x_offset; // x-offset of the frame.
int y_offset; // y-offset of the frame.
int duration; // duration of the frame (in milliseconds).
WebPChunkId id; // frame type: should be one of WEBP_CHUNK_ANMF,
// WEBP_CHUNK_FRGM or WEBP_CHUNK_IMAGE
WebPMuxAnimDispose dispose_method; // Disposal method for the frame.
WebPMuxAnimBlend blend_method; // Blend operation for the frame.
uint32_t pad[1]; // padding for later use
};
// Sets the (non-animated and non-fragmented) image in the mux object.
// Note: Any existing images (including frames/fragments) will be removed.
// Parameters:
// mux - (in/out) object in which the image is to be set
// bitstream - (in) can be a raw VP8/VP8L bitstream or a single-image
// WebP file (non-animated and non-fragmented)
// copy_data - (in) value 1 indicates given data WILL be copied to the mux
// object and value 0 indicates data will NOT be copied.
// Returns:
// WEBP_MUX_INVALID_ARGUMENT - if mux is NULL or bitstream is NULL.
// WEBP_MUX_MEMORY_ERROR - on memory allocation error.
// WEBP_MUX_OK - on success.
WEBP_EXTERN(WebPMuxError) WebPMuxSetImage(
WebPMux* mux, const WebPData* bitstream, int copy_data);
// Adds a frame at the end of the mux object.
// Notes: (1) frame.id should be one of WEBP_CHUNK_ANMF or WEBP_CHUNK_FRGM
// (2) For setting a non-animated non-fragmented image, use
// WebPMuxSetImage() instead.
// (3) Type of frame being pushed must be same as the frames in mux.
// (4) As WebP only supports even offsets, any odd offset will be snapped
// to an even location using: offset &= ~1
// Parameters:
// mux - (in/out) object to which the frame is to be added
// frame - (in) frame data.
// copy_data - (in) value 1 indicates given data WILL be copied to the mux
// object and value 0 indicates data will NOT be copied.
// Returns:
src/Source/OpenEXR/Copyrights/openexr/ChangeLog view on Meta::CPAN
Version 1.1.0:
* Added new targets to Visual C++ .NET 2003 project
for exrmaketiled, exrenvmap, exrmakepreview, and exrstdattr.
(Drew Hess)
* A few assorted Win32 fixes for Imath. (Drew Hess)
* GNU autoconf builds now produce versioned libraries.
This release is 1:0:0. (Drew Hess)
* Fixes for Visual C++ .NET 2003. (Paul Schneider)
* Updated Visual C++ zlib project file to zlib 1.2.1.
(Drew Hess)
* exrdisplay: Fixed fragment shader version. (Drew Hess)
* *Test: Fixed some compiler issues. (Drew Hess)
* Imath: Handle "restrict" keyword properly. (Drew Hess)
* IlmImfExamples: Updated to latest versions of example
source code, includes tiling and multi-res images.
(Florian Kainz)
* exrmakepreview: A new utility to create preview images.
(Florian Kainz)
* exrenvmap: A new utility to create OpenEXR environment
maps. (Florian Kainz)
* exrstdattr: A new utility to modify standard
src/Source/OpenEXR/Copyrights/openexr/ChangeLog view on Meta::CPAN
instead of converting to float first. Requires latest
Nvidia drivers.
Version 1.0.5:
* Fixed IlmImf.dll to use static runtime libs (Andreas).
* Added exrheader project to Visual Studio 6.0 workspace.
* Added some example code showing how to use the IlmImf library.
(Florian)
* Use DLL runtime libs for Win32 libraries rather than static
runtime libs.
* Add an exrdisplay_fragshader project to the Visual Studio 6.0
workspace to enable fragment shaders in Win32.
* Add an IlmImfDll project to the Visual Studio 6.0 workspace.
* In Win32, export the ImfCRgbaFile C interface via a DLL so
that Visual C++ 6.0 users can link against an Intel-compiled
IlmImf. (Andreas Kahler)
* Use auto_ptr in ImfAutoArray on Win32, it doesn't like large
automatic stacks.
* Performance improvements in PIZ decoding, between
20 and 60% speedup on Athlon and Pentium 4 systems.
(Florian)
* Updated the README with various information, made
some cosmetic changes for readability.
* Added fragment shader support to exrdisplay.
* Bumped the version to 1.0.5 in prep for release.
* Updated README and README.OSX to talk about CodeWarrior
project files.
* Incorporated Rodrigo Damazio's patch for an openexr.m4
macro file and an openexr.spec file for building RPMs.
* Small change in ImfAttribute.h to make IlmImf compile with gcc 2.95.
* Updated ImfDoubleAttribute.h for Codewarrior on MacOS.
* Added exrheader utility.
* Update to AUTHORS file.
* Added a README.win32 file.
src/Source/OpenEXR/Copyrights/openexr/NEWS view on Meta::CPAN
Version 1.0.6:
- Support for embedded preview images (thumbnails).
- Automatic frame buffer type conversion.
- Support for Visual Studio .NET 2003 w/ Microsoft's C++ compiler.
- Minor bug fixes.
Version 1.0.5:
- PIZ decoding should be 20-60% faster on Athlon and Pentium 4
systems.
- exrdisplay supports hardware rendering with vp30 profile fragment
shaders.
- Support for Win32 with Visual Studio 6.0 and Intel C++ compiler
version 7.0.
- Support for gcc 2.95.
- New exrheader utility.
- exrdisplay works on Win32 and OS X now.
- Minor bug fixes.
Version 1.0.4:
- Released under the new modified BSD license.
src/Source/OpenEXR/IlmImf/ImfEnvmap.h view on Meta::CPAN
IMF_EXPORT
IMATH_NAMESPACE::V2f pixelPosition (CubeMapFace face,
const IMATH_NAMESPACE::Box2i &dataWindow,
IMATH_NAMESPACE::V2f positionInFace);
//--------------------------------------------------------------
// Convert a 3D direction into a cube face, and a pixel position
// within that face.
//
// If you have a 3D direction, dir, the following code fragment
// finds the position, pos, of the corresponding pixel in an
// environment map with data window dw:
//
// CubeMapFace f;
// V2f pif, pos;
//
// faceAndPixelPosition (dir, dw, f, pif);
// pos = pixelPosition (f, dw, pif);
//
//--------------------------------------------------------------
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