Merge "Move over gif2webp to the new AnimEncoder API."

This commit is contained in:
pascal massimino 2015-01-08 12:30:34 -08:00 committed by Gerrit Code Review
commit abbae27982

View File

@ -14,6 +14,7 @@
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_CONFIG_H
@ -26,7 +27,6 @@
#include "webp/encode.h"
#include "webp/mux.h"
#include "./example_util.h"
#include "./gif2webp_util.h"
// GIFLIB_MAJOR is only defined in libgif >= 4.2.0.
#if defined(GIFLIB_MAJOR) && defined(GIFLIB_MINOR)
@ -42,55 +42,99 @@
#define GIF_DISPOSE_MASK 0x07
#define GIF_DISPOSE_SHIFT 2
#define WHITE_COLOR 0xffffffff
#define TRANSPARENT_COLOR 0x00ffffff
#define MAX_CACHE_SIZE 30
typedef enum GIFDisposeMethod {
GIF_DISPOSE_NONE,
GIF_DISPOSE_BACKGROUND,
GIF_DISPOSE_RESTORE_PREVIOUS
} GIFDisposeMethod;
typedef struct {
int x_offset, y_offset, width, height;
} GIFFrameRect;
//------------------------------------------------------------------------------
static int transparent_index = -1; // Opaque frame by default.
static void SanitizeKeyFrameIntervals(size_t* const kmin_ptr,
size_t* const kmax_ptr) {
size_t kmin = *kmin_ptr;
size_t kmax = *kmax_ptr;
int print_warning = 1;
static void ClearRectangle(WebPPicture* const picture,
int left, int top, int width, int height) {
int j;
for (j = top; j < top + height; ++j) {
uint32_t* const dst = picture->argb + j * picture->argb_stride;
int i;
for (i = left; i < left + width; ++i) {
dst[i] = TRANSPARENT_COLOR;
}
}
}
if (kmin == 0) { // Disable keyframe insertion.
kmax = ~0;
kmin = kmax - 1;
print_warning = 0;
}
if (kmax == 0) {
kmax = ~0;
print_warning = 0;
static void ClearPic(WebPPicture* const pic, const GIFFrameRect* const rect) {
if (rect != NULL) {
ClearRectangle(pic, rect->x_offset, rect->y_offset,
rect->width, rect->height);
} else {
ClearRectangle(pic, 0, 0, pic->width, pic->height);
}
}
if (kmin >= kmax) {
kmin = kmax - 1;
if (print_warning) {
fprintf(stderr,
"WARNING: Setting kmin = %d, so that kmin < kmax.\n", (int)kmin);
}
} else if (kmin < (kmax / 2 + 1)) {
// This ensures that cache.keyframe + kmin >= kmax is always true. So, we
// can flush all the frames in the count_since_key_frame == kmax case.
kmin = (kmax / 2 + 1);
if (print_warning) {
fprintf(stderr,
"WARNING: Setting kmin = %d, so that kmin >= kmax / 2 + 1.\n",
(int)kmin);
// TODO: Also used in picture.c. Move to a common location?
// Copy width x height pixels from 'src' to 'dst' honoring the strides.
static void CopyPlane(const uint8_t* src, int src_stride,
uint8_t* dst, int dst_stride, int width, int height) {
while (height-- > 0) {
memcpy(dst, src, width);
src += src_stride;
dst += dst_stride;
}
}
// Copy pixels from 'src' to 'dst' honoring strides. 'src' and 'dst' are assumed
// to be already allocated.
static void CopyPixels(const WebPPicture* const src, WebPPicture* const dst) {
assert(src->width == dst->width && src->height == dst->height);
CopyPlane((uint8_t*)src->argb, 4 * src->argb_stride, (uint8_t*)dst->argb,
4 * dst->argb_stride, 4 * src->width, src->height);
}
// Given 'src' picture and its frame rectangle 'rect', blend it into 'dst'.
static void BlendPixels(const WebPPicture* const src,
const GIFFrameRect* const rect,
WebPPicture* const dst) {
int j;
assert(src->width == dst->width && src->height == dst->height);
for (j = rect->y_offset; j < rect->y_offset + rect->height; ++j) {
int i;
for (i = rect->x_offset; i < rect->x_offset + rect->width; ++i) {
const uint32_t src_pixel = src->argb[j * src->argb_stride + i];
const int src_alpha = src_pixel >> 24;
if (src_alpha != 0) {
dst->argb[j * dst->argb_stride + i] = src_pixel;
}
}
}
// Limit the max number of frames that are allocated.
if (kmax - kmin > MAX_CACHE_SIZE) {
kmin = kmax - MAX_CACHE_SIZE;
if (print_warning) {
fprintf(stderr,
"WARNING: Setting kmin = %d, so that kmax - kmin <= 30.\n",
(int)kmin);
}
}
static void DisposeFrameRectangle(GIFDisposeMethod dispose_method,
const GIFFrameRect* const rect,
const WebPPicture* const prev_canvas,
WebPPicture* const curr_canvas) {
assert(rect != NULL);
if (dispose_method == GIF_DISPOSE_BACKGROUND) {
ClearPic(curr_canvas, rect);
} else if (dispose_method == GIF_DISPOSE_RESTORE_PREVIOUS) {
const int src_stride = prev_canvas->argb_stride;
const uint32_t* const src =
prev_canvas->argb + rect->x_offset + rect->y_offset * src_stride;
const int dst_stride = curr_canvas->argb_stride;
uint32_t* const dst =
curr_canvas->argb + rect->x_offset + rect->y_offset * dst_stride;
assert(prev_canvas != NULL);
CopyPlane((uint8_t*)src, 4 * src_stride, (uint8_t*)dst, 4 * dst_stride,
4 * rect->width, rect->height);
}
*kmin_ptr = kmin;
*kmax_ptr = kmax;
}
static void Remap(const uint8_t* const src, const GifFileType* const gif,
@ -104,20 +148,20 @@ static void Remap(const uint8_t* const src, const GifFileType* const gif,
for (i = 0; i < len; ++i) {
const GifColorType c = colors[src[i]];
dst[i] = (src[i] == transparent_index) ? WEBP_UTIL_TRANSPARENT_COLOR
dst[i] = (src[i] == transparent_index) ? TRANSPARENT_COLOR
: c.Blue | (c.Green << 8) | (c.Red << 16) | (0xff << 24);
}
}
// Read the GIF image frame.
static int ReadFrame(GifFileType* const gif, WebPFrameRect* const gif_rect,
static int ReadFrame(GifFileType* const gif, GIFFrameRect* const gif_rect,
WebPPicture* const webp_frame) {
WebPPicture sub_image;
const GifImageDesc* const image_desc = &gif->Image;
uint32_t* dst = NULL;
uint8_t* tmp = NULL;
int ok = 0;
WebPFrameRect rect = {
GIFFrameRect rect = {
image_desc->Left, image_desc->Top, image_desc->Width, image_desc->Height
};
*gif_rect = rect;
@ -166,7 +210,7 @@ static int ReadFrame(GifFileType* const gif, WebPFrameRect* const gif_rect,
static void GetBackgroundColor(const ColorMapObject* const color_map,
int bgcolor_idx, uint32_t* const bgcolor) {
if (transparent_index != -1 && bgcolor_idx == transparent_index) {
*bgcolor = WEBP_UTIL_TRANSPARENT_COLOR; // Special case.
*bgcolor = TRANSPARENT_COLOR; // Special case.
} else if (color_map == NULL || color_map->Colors == NULL
|| bgcolor_idx >= color_map->ColorCount) {
*bgcolor = WHITE_COLOR;
@ -261,36 +305,49 @@ int main(int argc, const char *argv[]) {
const char *in_file = NULL, *out_file = NULL;
FILE* out = NULL;
GifFileType* gif = NULL;
WebPConfig config;
WebPPicture frame;
int duration = 0;
FrameDisposeMethod orig_dispose = FRAME_DISPOSE_NONE;
WebPMuxAnimParams anim = { WHITE_COLOR, 0 };
WebPFrameCache* cache = NULL;
GIFDisposeMethod orig_dispose = GIF_DISPOSE_NONE;
WebPPicture frame; // Frame rectangle only (not disposed).
WebPPicture curr_canvas; // Not disposed.
WebPPicture prev_canvas; // Disposed.
WebPPicture prev_to_prev_canvas; // Disposed.
WebPAnimEncoder* enc = NULL;
WebPAnimEncoderOptions enc_options;
WebPConfig config;
int is_first_frame = 1; // Whether we are processing the first frame.
int done;
int c;
int quiet = 0;
WebPMux* mux = NULL;
WebPData webp_data = { NULL, 0 };
int keep_metadata = METADATA_XMP; // ICC not output by default.
int stored_icc = 0; // Whether we have already stored an ICC profile.
int stored_xmp = 0;
WebPData webp_data;
int keep_metadata = METADATA_XMP; // ICC not output by default.
WebPData icc_data;
int stored_icc = 0; // Whether we have already stored an ICC profile.
WebPData xmp_data;
int stored_xmp = 0; // Whether we have already stored an XMP profile.
int loop_count = 0;
int stored_loop_count = 0; // Whether we have found an explicit loop count.
WebPMux* mux = NULL;
int minimize_size = 0;
int default_kmin = 1; // Whether to use default kmin value.
int default_kmax = 1;
size_t kmin = 0;
size_t kmax = 0;
int allow_mixed = 0; // If true, each frame can be lossy or lossless.
if (!WebPConfigInit(&config) || !WebPPictureInit(&frame)) {
if (!WebPConfigInit(&config) || !WebPAnimEncoderOptionsInit(&enc_options) ||
!WebPPictureInit(&frame) || !WebPPictureInit(&curr_canvas) ||
!WebPPictureInit(&prev_canvas) ||
!WebPPictureInit(&prev_to_prev_canvas)) {
fprintf(stderr, "Error! Version mismatch!\n");
return -1;
}
config.lossless = 1; // Use lossless compression by default.
WebPDataInit(&webp_data);
WebPDataInit(&icc_data);
WebPDataInit(&xmp_data);
if (argc == 1) {
Help();
return 0;
@ -306,19 +363,19 @@ int main(int argc, const char *argv[]) {
} else if (!strcmp(argv[c], "-lossy")) {
config.lossless = 0;
} else if (!strcmp(argv[c], "-mixed")) {
allow_mixed = 1;
enc_options.allow_mixed = 1;
config.lossless = 0;
} else if (!strcmp(argv[c], "-q") && c < argc - 1) {
config.quality = ExUtilGetFloat(argv[++c], &parse_error);
} else if (!strcmp(argv[c], "-m") && c < argc - 1) {
config.method = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-min_size")) {
minimize_size = 1;
enc_options.minimize_size = 1;
} else if (!strcmp(argv[c], "-kmax") && c < argc - 1) {
kmax = ExUtilGetUInt(argv[++c], 0, &parse_error);
enc_options.kmax = ExUtilGetUInt(argv[++c], 0, &parse_error);
default_kmax = 0;
} else if (!strcmp(argv[c], "-kmin") && c < argc - 1) {
kmin = ExUtilGetUInt(argv[++c], 0, &parse_error);
enc_options.kmin = ExUtilGetUInt(argv[++c], 0, &parse_error);
default_kmin = 0;
} else if (!strcmp(argv[c], "-f") && c < argc - 1) {
config.filter_strength = ExUtilGetInt(argv[++c], 0, &parse_error);
@ -375,6 +432,7 @@ int main(int argc, const char *argv[]) {
quiet = 1;
} else if (!strcmp(argv[c], "-v")) {
verbose = 1;
enc_options.verbose = 1;
} else if (!strcmp(argv[c], "--")) {
if (c < argc - 1) in_file = argv[++c];
break;
@ -394,12 +452,11 @@ int main(int argc, const char *argv[]) {
// Appropriate default kmin, kmax values for lossy and lossless.
if (default_kmin) {
kmin = config.lossless ? 9 : 3;
enc_options.kmin = config.lossless ? 9 : 3;
}
if (default_kmax) {
kmax = config.lossless ? 17 : 5;
enc_options.kmax = config.lossless ? 17 : 5;
}
SanitizeKeyFrameIntervals(&kmin, &kmax);
if (!WebPValidateConfig(&config)) {
fprintf(stderr, "Error! Invalid configuration.\n");
@ -420,12 +477,6 @@ int main(int argc, const char *argv[]) {
#endif
if (gif == NULL) goto End;
mux = WebPMuxNew();
if (mux == NULL) {
fprintf(stderr, "ERROR: could not create a mux object.\n");
goto End;
}
// Loop over GIF images
done = 0;
do {
@ -434,17 +485,17 @@ int main(int argc, const char *argv[]) {
switch (type) {
case IMAGE_DESC_RECORD_TYPE: {
WebPFrameRect gif_rect;
GIFFrameRect gif_rect;
GifImageDesc* const image_desc = &gif->Image;
if (!DGifGetImageDesc(gif)) goto End;
// Fix some broken GIF global headers that report
// 0 x 0 screen dimension.
if (is_first_frame) {
if (verbose) {
printf("Canvas screen: %d x %d\n", gif->SWidth, gif->SHeight);
}
// Fix some broken GIF global headers that report
// 0 x 0 screen dimension.
if (gif->SWidth == 0 || gif->SHeight == 0) {
image_desc->Left = 0;
image_desc->Top = 0;
@ -458,29 +509,27 @@ int main(int argc, const char *argv[]) {
gif->SWidth, gif->SHeight);
}
}
// Set definitive canvas size.
err = WebPMuxSetCanvasSize(mux, gif->SWidth, gif->SHeight);
if (err != WEBP_MUX_OK) {
fprintf(stderr, "Invalid canvas size %d x %d\n",
gif->SWidth, gif->SHeight);
goto End;
}
// Allocate current buffer.
frame.width = gif->SWidth;
frame.height = gif->SHeight;
frame.use_argb = 1;
if (!WebPPictureAlloc(&frame)) goto End;
WebPUtilClearPic(&frame, NULL);
// Initialize cache.
cache = WebPFrameCacheNew(frame.width, frame.height, minimize_size,
kmin, kmax, allow_mixed);
if (cache == NULL) goto End;
ClearPic(&frame, NULL);
WebPPictureCopy(&frame, &curr_canvas);
WebPPictureCopy(&frame, &prev_canvas);
WebPPictureCopy(&frame, &prev_to_prev_canvas);
// Background color.
GetBackgroundColor(gif->SColorMap, gif->SBackGroundColor,
&anim.bgcolor);
&enc_options.anim_params.bgcolor);
// Initialize encoder.
enc = WebPAnimEncoderNew(curr_canvas.width, curr_canvas.height,
&enc_options);
if (enc == NULL) goto End;
is_first_frame = 0;
}
// Some even more broken GIF can have sub-rect with zero width/height.
if (image_desc->Width == 0 || image_desc->Height == 0) {
image_desc->Width = gif->SWidth;
@ -490,25 +539,25 @@ int main(int argc, const char *argv[]) {
if (!ReadFrame(gif, &gif_rect, &frame)) {
goto End;
}
// Blend frame rectangle with previous canvas to compose full canvas.
// Note that 'curr_canvas' is same as 'prev_canvas' at this point.
BlendPixels(&frame, &gif_rect, &curr_canvas);
if (!WebPFrameCacheAddFrame(cache, &config, &gif_rect, orig_dispose,
duration, &frame)) {
if (!WebPAnimEncoderAdd(enc, &curr_canvas, duration, &config)) {
fprintf(stderr, "Error! Cannot encode frame as WebP\n");
fprintf(stderr, "Error code: %d\n", frame.error_code);
fprintf(stderr, "Error code: %d\n", curr_canvas.error_code);
}
err = WebPFrameCacheFlush(cache, verbose, mux);
if (err != WEBP_MUX_OK) {
fprintf(stderr, "ERROR (%s): Could not add animation frame.\n",
ErrorString(err));
goto End;
}
is_first_frame = 0;
// Update canvases.
CopyPixels(&prev_canvas, &prev_to_prev_canvas);
DisposeFrameRectangle(orig_dispose, &gif_rect, &prev_canvas,
&curr_canvas);
CopyPixels(&curr_canvas, &prev_canvas);
// In GIF, graphic control extensions are optional for a frame, so we
// may not get one before reading the next frame. To handle this case,
// we reset frame properties to reasonable defaults for the next frame.
orig_dispose = FRAME_DISPOSE_NONE;
orig_dispose = GIF_DISPOSE_NONE;
duration = 0;
transparent_index = -1; // Opaque frame by default.
break;
@ -531,15 +580,15 @@ int main(int argc, const char *argv[]) {
duration = delay * 10; // Duration is in 1 ms units for WebP.
switch (dispose) {
case 3:
orig_dispose = FRAME_DISPOSE_RESTORE_PREVIOUS;
orig_dispose = GIF_DISPOSE_RESTORE_PREVIOUS;
break;
case 2:
orig_dispose = FRAME_DISPOSE_BACKGROUND;
orig_dispose = GIF_DISPOSE_BACKGROUND;
break;
case 1:
case 0:
default:
orig_dispose = FRAME_DISPOSE_NONE;
orig_dispose = GIF_DISPOSE_NONE;
break;
}
transparent_index = (flags & GIF_TRANSPARENT_MASK) ? data[4] : -1;
@ -556,10 +605,11 @@ int main(int argc, const char *argv[]) {
if (DGifGetExtensionNext(gif, &data) == GIF_ERROR) goto End;
if (data == NULL) goto End; // Loop count sub-block missing.
if (data[0] < 3 || data[1] != 1) break; // wrong size/marker
anim.loop_count = data[2] | (data[3] << 8);
loop_count = data[2] | (data[3] << 8);
if (verbose) {
fprintf(stderr, "Loop count: %d\n", anim.loop_count);
fprintf(stderr, "Loop count: %d\n", loop_count);
}
stored_loop_count = (loop_count != 0);
} else { // An extension containing metadata.
// We only store the first encountered chunk of each type, and
// only if requested by the user.
@ -570,9 +620,7 @@ int main(int argc, const char *argv[]) {
!stored_icc &&
!memcmp(data + 1, "ICCRGBG1012", 11);
if (is_xmp || is_icc) {
const char* const fourccs[2] = { "XMP " , "ICCP" };
const char* const features[2] = { "XMP" , "ICC" };
WebPData metadata = { NULL, 0 };
WebPData* const metadata = is_xmp ? &xmp_data : &icc_data;
// Construct metadata from sub-blocks.
// Usual case (including ICC profile): In each sub-block, the
// first byte specifies its size in bytes (0 to 255) and the
@ -581,47 +629,34 @@ int main(int argc, const char *argv[]) {
// is also part of the XMP payload. XMP in GIF also has a 257
// byte padding data. See the XMP specification for details.
while (1) {
WebPData prev_metadata = metadata;
WebPData subblock;
const uint8_t* tmp;
if (DGifGetExtensionNext(gif, &data) == GIF_ERROR) {
WebPDataClear(&metadata);
goto End;
}
if (data == NULL) break; // Finished.
subblock.size = is_xmp ? data[0] + 1 : data[0];
assert(subblock.size > 0);
subblock.bytes = is_xmp ? data : data + 1;
metadata.bytes =
(uint8_t*)realloc((void*)metadata.bytes,
prev_metadata.size + subblock.size);
if (metadata.bytes == NULL) {
WebPDataClear(&prev_metadata);
// Note: We store returned value in 'tmp' first, to avoid
// leaking old memory in metadata->bytes on error.
tmp = (uint8_t*)realloc((void*)metadata->bytes,
metadata->size + subblock.size);
if (tmp == NULL) {
goto End;
}
metadata.size += subblock.size;
memcpy((void*)(metadata.bytes + prev_metadata.size),
memcpy((void*)(tmp + metadata->size),
subblock.bytes, subblock.size);
metadata->bytes = tmp;
metadata->size += subblock.size;
}
if (is_xmp) {
// XMP padding data is 0x01, 0xff, 0xfe ... 0x01, 0x00.
const size_t xmp_pading_size = 257;
if (metadata.size > xmp_pading_size) {
metadata.size -= xmp_pading_size;
if (metadata->size > xmp_pading_size) {
metadata->size -= xmp_pading_size;
}
}
// Add metadata chunk.
err = WebPMuxSetChunk(mux, fourccs[is_icc], &metadata, 1);
if (verbose) {
fprintf(stderr, "%s size: %d\n",
features[is_icc], (int)metadata.size);
}
WebPDataClear(&metadata);
if (err != WEBP_MUX_OK) {
fprintf(stderr, "ERROR (%s): Could not set %s chunk.\n",
ErrorString(err), features[is_icc]);
goto End;
}
if (is_icc) {
stored_icc = 1;
} else if (is_xmp) {
@ -653,27 +688,70 @@ int main(int argc, const char *argv[]) {
}
} while (!done);
// Flush any pending frames.
err = WebPFrameCacheFlushAll(cache, verbose, mux);
if (err != WEBP_MUX_OK) {
fprintf(stderr, "ERROR (%s): Could not add animation frame.\n",
ErrorString(err));
if (!WebPAnimEncoderAssemble(enc, &webp_data)) {
// TODO(urvang): Print actual error code.
fprintf(stderr, "ERROR assembling the WebP file.\n");
goto End;
}
// Finish muxing
err = WebPMuxSetAnimationParams(mux, &anim);
if (err != WEBP_MUX_OK) {
fprintf(stderr, "ERROR (%s): Could not set animation parameters.\n",
ErrorString(err));
goto End;
if (stored_loop_count || stored_icc || stored_xmp) {
// Re-mux to add loop count and/or metadata as needed.
mux = WebPMuxCreate(&webp_data, 1);
if (mux == NULL) {
fprintf(stderr, "ERROR: Could not re-mux to add loop count/metadata.\n");
goto End;
}
WebPDataClear(&webp_data);
if (stored_loop_count) { // Update loop count.
WebPMuxAnimParams new_params;
err = WebPMuxGetAnimationParams(mux, &new_params);
if (err != WEBP_MUX_OK) {
fprintf(stderr, "ERROR (%s): Could not fetch loop count.\n",
ErrorString(err));
goto End;
}
new_params.loop_count = loop_count;
err = WebPMuxSetAnimationParams(mux, &new_params);
if (err != WEBP_MUX_OK) {
fprintf(stderr, "ERROR (%s): Could not update loop count.\n",
ErrorString(err));
goto End;
}
}
if (stored_icc) { // Add ICCP chunk.
err = WebPMuxSetChunk(mux, "ICCP", &icc_data, 1);
if (verbose) {
fprintf(stderr, "ICC size: %d\n", (int)icc_data.size);
}
if (err != WEBP_MUX_OK) {
fprintf(stderr, "ERROR (%s): Could not set ICC chunk.\n",
ErrorString(err));
goto End;
}
}
if (stored_xmp) { // Add XMP chunk.
err = WebPMuxSetChunk(mux, "XMP ", &xmp_data, 1);
if (verbose) {
fprintf(stderr, "XMP size: %d\n", (int)xmp_data.size);
}
if (err != WEBP_MUX_OK) {
fprintf(stderr, "ERROR (%s): Could not set XMP chunk.\n",
ErrorString(err));
goto End;
}
}
err = WebPMuxAssemble(mux, &webp_data);
if (err != WEBP_MUX_OK) {
fprintf(stderr, "ERROR (%s): Could not assemble when re-muxing to add "
"loop count/metadata.\n", ErrorString(err));
goto End;
}
}
err = WebPMuxAssemble(mux, &webp_data);
if (err != WEBP_MUX_OK) {
fprintf(stderr, "ERROR (%s) assembling the WebP file.\n", ErrorString(err));
goto End;
}
if (out_file != NULL) {
if (!ExUtilWriteFile(out_file, webp_data.bytes, webp_data.size)) {
fprintf(stderr, "Error writing output file: %s\n", out_file);
@ -693,10 +771,15 @@ int main(int argc, const char *argv[]) {
gif_error = GIF_OK;
End:
WebPDataClear(&webp_data);
WebPDataClear(&icc_data);
WebPDataClear(&xmp_data);
WebPMuxDelete(mux);
WebPDataClear(&webp_data);
WebPPictureFree(&frame);
WebPFrameCacheDelete(cache);
WebPPictureFree(&curr_canvas);
WebPPictureFree(&prev_canvas);
WebPPictureFree(&prev_to_prev_canvas);
WebPAnimEncoderDelete(enc);
if (out != NULL && out_file != NULL) fclose(out);
if (gif_error != GIF_OK) {