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Animation structure manipulation functions and modifications to exist…
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…ing functions to fit in with GdkPixbufAnimation.
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@Hiers
Hiers committed Apr 9, 2023
1 parent 0e1a187 commit fa982d6
Showing 1 changed file with 203 additions and 48 deletions.
251 changes: 203 additions & 48 deletions contrib/gdk-pixbuf/loader.c
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Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,10 @@ G_DECLARE_FINAL_TYPE(AvifAnimationIter, avif_animation_iter, GDK, AVIF_ANIMATION

G_DEFINE_TYPE(AvifAnimationIter, avif_animation_iter, GDK_TYPE_PIXBUF_ANIMATION_ITER);

/* Animation class functions */
static void avif_animation_finalize(GObject * obj)
{
AvifAnimation * context = (AvifAnimation *)obj;
if (!context)
return;

Expand All @@ -69,57 +72,153 @@ G_DEFINE_TYPE(AvifAnimationIter, avif_animation_iter, GDK_TYPE_PIXBUF_ANIMATION_
context->bytes = NULL;
}

if (context->pixbuf) {
g_object_unref(context->pixbuf);
context->pixbuf = NULL;
if (context->frames) {
for(size_t i = 0; i < context->frames->len; i++){
g_object_unref(g_array_index(context->frames, AvifAnimationFrame, i).pixbuf);
}
g_array_free(context->frames, TRUE);
}
}

g_free(context);
static gboolean avif_animation_is_static_image(GdkPixbufAnimation * animation)
{
AvifAnimation * context = (AvifAnimation *)animation;
return context->frames->len == 1;
}

static gboolean avif_context_try_load(struct avif_context * context, GError ** error)
static GdkPixbuf * avif_animation_get_static_image(GdkPixbufAnimation * animation)
{
avifResult ret;
avifDecoder * decoder = context->decoder;
avifImage * image;
avifRGBImage rgb;
const uint8_t * data;
size_t size;
int width, height;
GdkPixbuf *output;
AvifAnimation * context = (AvifAnimation *)animation;
return g_array_index(context->frames, AvifAnimationFrame, 0).pixbuf;
}

data = g_bytes_get_data(context->bytes, &size);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
static GdkPixbufAnimationIter * avif_animation_get_iter(GdkPixbufAnimation * animation, const GTimeVal * start_time)
{
AvifAnimationIter * iter = g_object_new(GDK_TYPE_AVIF_ANIMATION_ITER, NULL);

ret = avifDecoderSetIOMemory(decoder, data, size);
if (ret != AVIF_RESULT_OK) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
"Couldn't decode image: %s", avifResultToString(ret));
return FALSE;
}
iter->animation = (AvifAnimation *)animation;
g_object_ref(iter->animation);

ret = avifDecoderParse(decoder);
if (ret != AVIF_RESULT_OK) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
"Couldn't decode image: %s", avifResultToString(ret));
return FALSE;
}
iter->time_offset = start_time->tv_sec * 1000 + start_time->tv_usec / 1000;
iter->current_frame = 0;

if (decoder->imageCount > 1) {
g_set_error_literal(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED,
"Image sequences not yet implemented");
return FALSE;
return (GdkPixbufAnimationIter *)iter;
}
G_GNUC_END_IGNORE_DEPRECATIONS

static void avif_animation_get_size(GdkPixbufAnimation * animation, int * width, int * height)
{
AvifAnimation * context = (AvifAnimation *)animation;
if(width){
*width = context->decoder->image->width;
}
if(height){
*height = context->decoder->image->height;
}
}

ret = avifDecoderNextImage(decoder);
if (ret == AVIF_RESULT_NO_IMAGES_REMAINING) {
/* No more images, bail out. Verify that you got the expected amount of images decoded. */
return TRUE;
} else if (ret != AVIF_RESULT_OK) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED,
"Failed to decode all frames: %s", avifResultToString(ret));
return FALSE;
static void avif_animation_init(AvifAnimation * obj) {
/* To ignore unused function and unused paremeter warnings/errors */
(void)obj;
}
static void avif_animation_class_init(AvifAnimationClass * class) {
class->parent_class.get_iter = avif_animation_get_iter;
class->parent_class.get_size = avif_animation_get_size;
class->parent_class.get_static_image = avif_animation_get_static_image;
class->parent_class.is_static_image = avif_animation_is_static_image;
G_OBJECT_CLASS(class)->finalize = avif_animation_finalize;
}

/* Iterator class functions */
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
static gboolean avif_animation_iter_advance(GdkPixbufAnimationIter * iter, const GTimeVal * current_time)
{
AvifAnimationIter * avif_iter = (AvifAnimationIter *)iter;
AvifAnimation * context = (AvifAnimation *)avif_iter->animation;

size_t prev_frame = avif_iter->current_frame;
uint64_t elapsed_time = current_time->tv_sec * 1000 + current_time->tv_usec / 1000 - avif_iter->time_offset;

/*
* duration in seconds stored in a double which is cast to uint64_t
* is the precision loss here significant?
* */
uint64_t animation_time = (uint64_t)(context->decoder->duration * 1000);

if (context->decoder->repetitionCount > 0 && elapsed_time > animation_time * context->decoder->repetitionCount) {
avif_iter->current_frame = context->decoder->imageCount - 1;
} else {
elapsed_time = elapsed_time % animation_time;

avif_iter->current_frame = 0;
uint64_t frame_duration;

while (1) {
frame_duration = g_array_index(context->frames, AvifAnimationFrame, avif_iter->current_frame).duration_ms;

if (elapsed_time <= frame_duration) {
break;
}
elapsed_time -= frame_duration;
avif_iter->current_frame++;
}
}

return prev_frame != avif_iter->current_frame;
}
G_GNUC_END_IGNORE_DEPRECATIONS

static int avif_animation_iter_get_delay_time(GdkPixbufAnimationIter * iter)
{
AvifAnimationIter * avif_iter = (AvifAnimationIter *)iter;
return g_array_index(avif_iter->animation->frames, AvifAnimationFrame, avif_iter->current_frame).duration_ms;
}

static GdkPixbuf * avif_animation_iter_get_pixbuf(GdkPixbufAnimationIter * iter)
{
AvifAnimationIter * avif_iter = (AvifAnimationIter *)iter;
return g_array_index(avif_iter->animation->frames, AvifAnimationFrame, avif_iter->current_frame).pixbuf;
}

static gboolean avif_animation_iter_on_currently_loading_frame(GdkPixbufAnimationIter * iter)
{
/* this function is effectively useless with how the rest of this module was written */
(void)iter;
return FALSE;
}

static void avif_animation_iter_finalize(GObject * obj)
{
AvifAnimationIter * iter = (AvifAnimationIter *)obj;
g_object_unref(iter->animation);
g_object_unref(iter);
}


static void avif_animation_iter_init(AvifAnimationIter * obj) {
/* To ignore unused function and unused paremeter warnings/errors */
(void)obj;
}
static void avif_animation_iter_class_init(AvifAnimationIterClass * class) {
class->parent_class.advance = avif_animation_iter_advance;
class->parent_class.get_delay_time = avif_animation_iter_get_delay_time;
class->parent_class.get_pixbuf = avif_animation_iter_get_pixbuf;
class->parent_class.on_currently_loading_frame = avif_animation_iter_on_currently_loading_frame;
G_OBJECT_CLASS(class)->finalize = avif_animation_iter_finalize;
}

G_END_DECLS

GdkPixbuf* set_pixbuf(AvifAnimation * context, GError ** error)
{
avifResult ret;
avifDecoder * decoder = context->decoder;
GdkPixbuf * output;

avifImage * image;
avifRGBImage rgb;
int width, height;
image = decoder->image;
width = image->width;
height = image->height;
Expand Down Expand Up @@ -282,14 +381,70 @@ static gboolean avif_context_try_load(struct avif_context * context, GError ** e
g_free(icc_base64);
}

if (context->pixbuf) {
g_object_unref(context->pixbuf);
context->pixbuf = NULL;
return output;
}

static gboolean avif_context_try_load(AvifAnimation * context, GError ** error)
{

context->frames = g_array_new(FALSE, TRUE, sizeof(AvifAnimationFrame));

avifResult ret;
avifDecoder * decoder = context->decoder;
const uint8_t * data;
size_t size;

data = g_bytes_get_data(context->bytes, &size);

ret = avifDecoderSetIOMemory(decoder, data, size);
if (ret != AVIF_RESULT_OK) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
"Couldn't decode image: %s", avifResultToString(ret));
return FALSE;
}

ret = avifDecoderParse(decoder);
if (ret != AVIF_RESULT_OK) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
"Couldn't decode image: %s", avifResultToString(ret));
return FALSE;
}

ret = avifDecoderNextImage(decoder);
if (ret == AVIF_RESULT_NO_IMAGES_REMAINING) {
/* No more images, bail out. Verify that you got the expected amount of images decoded. */
return TRUE;
} else if (ret != AVIF_RESULT_OK) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED,
"Failed to decode all frames: %s", avifResultToString(ret));
return FALSE;
}

context->pixbuf = output;
context->prepared_func(context->pixbuf, NULL, context->user_data);
AvifAnimationFrame frame;
frame.pixbuf = set_pixbuf(context, error);
frame.duration_ms = (uint64_t)(decoder->imageTiming.duration * 1000);

g_array_append_val(context->frames, frame);

context->prepared_func(g_array_index(context->frames, AvifAnimationFrame, 0).pixbuf,
decoder->imageCount > 1 ? (GdkPixbufAnimation *)context : NULL, context->user_data);

while(decoder->imageIndex < decoder->imageCount - 1) {
ret = avifDecoderNextImage(decoder);

if (ret == AVIF_RESULT_NO_IMAGES_REMAINING) {
return TRUE;
} else if (ret != AVIF_RESULT_OK) {
g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED,
"Failed to decode all frames: %s", avifResultToString(ret));
return FALSE;
}

frame.pixbuf = set_pixbuf(context, error);
frame.duration_ms = (uint64_t)(decoder->imageTiming.duration * 1000);

g_array_append_val(context->frames, frame);
}
return TRUE;
}

Expand All @@ -298,7 +453,7 @@ static gpointer begin_load(GdkPixbufModuleSizeFunc size_func,
GdkPixbufModuleUpdatedFunc updated_func,
gpointer user_data, GError ** error)
{
struct avif_context * context;
AvifAnimation * context;
avifDecoder * decoder;

g_assert(prepared_func != NULL);
Expand All @@ -310,7 +465,7 @@ static gpointer begin_load(GdkPixbufModuleSizeFunc size_func,
return NULL;
}

context = g_new0(struct avif_context, 1);
context = g_object_new(GDK_TYPE_AVIF_ANIMATION, NULL);
if (!context)
return NULL;

Expand All @@ -327,21 +482,21 @@ static gpointer begin_load(GdkPixbufModuleSizeFunc size_func,

static gboolean stop_load(gpointer data, GError ** error)
{
struct avif_context * context = (struct avif_context *) data;
AvifAnimation * context = (AvifAnimation *) data;
gboolean ret;

context->bytes = g_byte_array_free_to_bytes(context->data);
context->data = NULL;
ret = avif_context_try_load(context, error);

avif_context_free(context);
g_object_unref(context);

return ret;
}

static gboolean load_increment(gpointer data, const guchar * buf, guint size, GError ** error)
{
struct avif_context * context = (struct avif_context *) data;
AvifAnimation * context = (AvifAnimation *) data;
g_byte_array_append(context->data, buf, size);
if (error)
*error = NULL;
Expand Down

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