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gecko-dev/b2g/app/BootAnimation.cpp

629 строки
18 KiB
C++
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/* Copyright 2012 Mozilla Foundation and Mozilla contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <algorithm>
#include <endian.h>
#include <fcntl.h>
#include <string>
#include <sys/mman.h>
#include <sys/stat.h>
#include <vector>
#include "mozilla/FileUtils.h"
#include "mozilla/NullPtr.h"
#include "mozilla/Util.h"
#include "png.h"
#include "android/log.h"
#include "ui/FramebufferNativeWindow.h"
#include "hardware_legacy/power.h"
#include "hardware/gralloc.h"
#define LOG(args...) __android_log_print(ANDROID_LOG_INFO, "Gonk" , ## args)
#define LOGW(args...) __android_log_print(ANDROID_LOG_WARN, "Gonk", ## args)
#define LOGE(args...) __android_log_print(ANDROID_LOG_ERROR, "Gonk", ## args)
using namespace android;
using namespace mozilla;
using namespace std;
static sp<FramebufferNativeWindow> gNativeWindow;
static pthread_t sAnimationThread;
static bool sRunAnimation;
/* See http://www.pkware.com/documents/casestudies/APPNOTE.TXT */
struct local_file_header {
uint32_t signature;
uint16_t min_version;
uint16_t general_flag;
uint16_t compression;
uint16_t lastmod_time;
uint16_t lastmod_date;
uint32_t crc32;
uint32_t compressed_size;
uint32_t uncompressed_size;
uint16_t filename_size;
uint16_t extra_field_size;
char data[0];
uint32_t GetDataSize() const
{
return letoh32(uncompressed_size);
}
uint32_t GetSize() const
{
/* XXX account for data descriptor */
return sizeof(local_file_header) + letoh16(filename_size) +
letoh16(extra_field_size) + GetDataSize();
}
const char * GetData() const
{
return data + letoh16(filename_size) + letoh16(extra_field_size);
}
} __attribute__((__packed__));
struct data_descriptor {
uint32_t crc32;
uint32_t compressed_size;
uint32_t uncompressed_size;
} __attribute__((__packed__));
struct cdir_entry {
uint32_t signature;
uint16_t creator_version;
uint16_t min_version;
uint16_t general_flag;
uint16_t compression;
uint16_t lastmod_time;
uint16_t lastmod_date;
uint32_t crc32;
uint32_t compressed_size;
uint32_t uncompressed_size;
uint16_t filename_size;
uint16_t extra_field_size;
uint16_t file_comment_size;
uint16_t disk_num;
uint16_t internal_attr;
uint32_t external_attr;
uint32_t offset;
char data[0];
uint32_t GetDataSize() const
{
return letoh32(compressed_size);
}
uint32_t GetSize() const
{
return sizeof(cdir_entry) + letoh16(filename_size) +
letoh16(extra_field_size) + letoh16(file_comment_size);
}
bool Valid() const
{
return signature == htole32(0x02014b50);
}
} __attribute__((__packed__));
struct cdir_end {
uint32_t signature;
uint16_t disk_num;
uint16_t cdir_disk;
uint16_t disk_entries;
uint16_t cdir_entries;
uint32_t cdir_size;
uint32_t cdir_offset;
uint16_t comment_size;
char comment[0];
bool Valid() const
{
return signature == htole32(0x06054b50);
}
} __attribute__((__packed__));
/* We don't have access to libjar and the zip reader in android
* doesn't quite fit what we want to do. */
class ZipReader {
const char *mBuf;
const cdir_end *mEnd;
const char *mCdir_limit;
uint32_t mBuflen;
public:
ZipReader() : mBuf(nullptr) {}
~ZipReader() {
if (mBuf)
munmap((void *)mBuf, mBuflen);
}
bool OpenArchive(const char *path)
{
int fd;
do {
fd = open(path, O_RDONLY);
} while (fd == -1 && errno == EINTR);
if (fd == -1)
return false;
struct stat sb;
if (fstat(fd, &sb) == -1 || sb.st_size < sizeof(cdir_end)) {
close(fd);
return false;
}
mBuflen = sb.st_size;
mBuf = (char *)mmap(nullptr, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
close(fd);
if (!mBuf) {
return false;
}
madvise(mBuf, sb.st_size, MADV_SEQUENTIAL);
mEnd = (cdir_end *)(mBuf + mBuflen - sizeof(cdir_end));
while (!mEnd->Valid() &&
(char *)mEnd > mBuf) {
mEnd = (cdir_end *)((char *)mEnd - 1);
}
mCdir_limit = mBuf + letoh32(mEnd->cdir_offset) + letoh32(mEnd->cdir_size);
if (!mEnd->Valid() || mCdir_limit > (char *)mEnd) {
munmap((void *)mBuf, mBuflen);
mBuf = nullptr;
return false;
}
return true;
}
/* Pass null to get the first cdir entry */
const cdir_entry * GetNextEntry(const cdir_entry *prev)
{
const cdir_entry *entry;
if (prev)
entry = (cdir_entry *)((char *)prev + prev->GetSize());
else
entry = (cdir_entry *)(mBuf + letoh32(mEnd->cdir_offset));
if (((char *)entry + entry->GetSize()) > mCdir_limit ||
!entry->Valid())
return nullptr;
return entry;
}
string GetEntryName(const cdir_entry *entry)
{
uint16_t len = letoh16(entry->filename_size);
string name;
name.append(entry->data, len);
return name;
}
const local_file_header * GetLocalEntry(const cdir_entry *entry)
{
const local_file_header * data =
(local_file_header *)(mBuf + letoh32(entry->offset));
if (((char *)data + data->GetSize()) > (char *)mEnd)
return nullptr;
return data;
}
};
struct AnimationFrame {
char path[256];
char *buf;
const local_file_header *file;
uint32_t width;
uint32_t height;
uint16_t bytepp;
AnimationFrame() : buf(nullptr) {}
AnimationFrame(const AnimationFrame &frame) : buf(nullptr) {
strncpy(path, frame.path, sizeof(path));
file = frame.file;
}
~AnimationFrame()
{
if (buf)
free(buf);
}
bool operator<(const AnimationFrame &other) const
{
return strcmp(path, other.path) < 0;
}
void ReadPngFrame(int outputFormat);
};
struct AnimationPart {
int32_t count;
int32_t pause;
char path[256];
vector<AnimationFrame> frames;
};
using namespace android;
struct RawReadState {
const char *start;
uint32_t offset;
uint32_t length;
};
static void
RawReader(png_structp png_ptr, png_bytep data, png_size_t length)
{
RawReadState *state = (RawReadState *)png_get_io_ptr(png_ptr);
if (length > (state->length - state->offset))
png_err(png_ptr);
memcpy(data, state->start + state->offset, length);
state->offset += length;
}
static void
TransformTo565(png_structp png_ptr, png_row_infop row_info, png_bytep data)
{
uint16_t *outbuf = (uint16_t *)data;
uint8_t *inbuf = (uint8_t *)data;
for (int i = 0; i < row_info->rowbytes; i += 3) {
*outbuf++ = ((inbuf[i] & 0xF8) << 8) |
((inbuf[i + 1] & 0xFC) << 3) |
((inbuf[i + 2] ) >> 3);
}
}
void
AnimationFrame::ReadPngFrame(int outputFormat)
{
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
static const png_byte unused_chunks[] =
{ 98, 75, 71, 68, '\0', /* bKGD */
99, 72, 82, 77, '\0', /* cHRM */
104, 73, 83, 84, '\0', /* hIST */
105, 67, 67, 80, '\0', /* iCCP */
105, 84, 88, 116, '\0', /* iTXt */
111, 70, 70, 115, '\0', /* oFFs */
112, 67, 65, 76, '\0', /* pCAL */
115, 67, 65, 76, '\0', /* sCAL */
112, 72, 89, 115, '\0', /* pHYs */
115, 66, 73, 84, '\0', /* sBIT */
115, 80, 76, 84, '\0', /* sPLT */
116, 69, 88, 116, '\0', /* tEXt */
116, 73, 77, 69, '\0', /* tIME */
122, 84, 88, 116, '\0'}; /* zTXt */
static const png_byte tRNS_chunk[] =
{116, 82, 78, 83, '\0'}; /* tRNS */
#endif
png_structp pngread = png_create_read_struct(PNG_LIBPNG_VER_STRING,
nullptr, nullptr, nullptr);
if (!pngread)
return;
png_infop pnginfo = png_create_info_struct(pngread);
if (!pnginfo) {
png_destroy_read_struct(&pngread, &pnginfo, nullptr);
return;
}
if (setjmp(png_jmpbuf(pngread))) {
// libpng reported an error and longjumped here. Clean up and return.
png_destroy_read_struct(&pngread, &pnginfo, nullptr);
return;
}
RawReadState state;
state.start = file->GetData();
state.length = file->GetDataSize();
state.offset = 0;
png_set_read_fn(pngread, &state, RawReader);
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
/* Ignore unused chunks */
png_set_keep_unknown_chunks(pngread, 1, unused_chunks,
(int)sizeof(unused_chunks)/5);
/* Ignore the tRNS chunk if we only want opaque output */
if (outputFormat == HAL_PIXEL_FORMAT_RGB_888 ||
outputFormat == HAL_PIXEL_FORMAT_RGB_565) {
png_set_keep_unknown_chunks(pngread, 1, tRNS_chunk, 1);
}
#endif
png_read_info(pngread, pnginfo);
width = png_get_image_width(pngread, pnginfo);
height = png_get_image_height(pngread, pnginfo);
switch (outputFormat) {
case HAL_PIXEL_FORMAT_BGRA_8888:
png_set_bgr(pngread);
// FALL THROUGH
case HAL_PIXEL_FORMAT_RGBA_8888:
case HAL_PIXEL_FORMAT_RGBX_8888:
bytepp = 4;
png_set_filler(pngread, 0xFF, PNG_FILLER_AFTER);
break;
case HAL_PIXEL_FORMAT_RGB_888:
bytepp = 3;
png_set_strip_alpha(pngread);
break;
default:
LOGW("Unknown pixel format %d. Assuming RGB 565.", outputFormat);
// FALL THROUGH
case HAL_PIXEL_FORMAT_RGB_565:
bytepp = 2;
png_set_strip_alpha(pngread);
png_set_read_user_transform_fn(pngread, TransformTo565);
break;
}
// An extra row is added to give libpng enough space when
// decoding 3/4 bytepp inputs for 2 bytepp output surfaces
buf = (char *)malloc(width * (height + 1) * bytepp);
vector<char *> rows(height + 1);
uint32_t stride = width * bytepp;
for (int i = 0; i < height; i++) {
rows[i] = buf + (stride * i);
}
rows[height] = nullptr;
png_set_strip_16(pngread);
png_set_palette_to_rgb(pngread);
png_set_gray_to_rgb(pngread);
png_read_image(pngread, (png_bytepp)&rows.front());
png_destroy_read_struct(&pngread, &pnginfo, nullptr);
}
static void *
AnimationThread(void *)
{
ZipReader reader;
if (!reader.OpenArchive("/system/media/bootanimation.zip")) {
LOGW("Could not open boot animation");
return nullptr;
}
const cdir_entry *entry = nullptr;
const local_file_header *file = nullptr;
while ((entry = reader.GetNextEntry(entry))) {
string name = reader.GetEntryName(entry);
if (!name.compare("desc.txt")) {
file = reader.GetLocalEntry(entry);
break;
}
}
if (!file) {
LOGW("Could not find desc.txt in boot animation");
return nullptr;
}
int format;
ANativeWindow *window = gNativeWindow.get();
window->query(window, NATIVE_WINDOW_FORMAT, &format);
hw_module_t const *module;
if (hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module)) {
LOGW("Could not get gralloc module");
return nullptr;
}
gralloc_module_t const *grmodule =
reinterpret_cast<gralloc_module_t const*>(module);
string descCopy;
descCopy.append(file->GetData(), entry->GetDataSize());
int32_t width, height, fps;
const char *line = descCopy.c_str();
const char *end;
bool headerRead = true;
vector<AnimationPart> parts;
/*
* bootanimation.zip
*
* This is the boot animation file format that Android uses.
* It's a zip file with a directories containing png frames
* and a desc.txt that describes how they should be played.
*
* desc.txt contains two types of lines
* 1. [width] [height] [fps]
* There is one of these lines per bootanimation.
* If the width and height are smaller than the screen,
* the frames are centered on a black background.
* XXX: Currently we stretch instead of centering the frame.
* 2. p [count] [pause] [path]
* This describes one animation part.
* Each animation part is played in sequence.
* An animation part contains all the files/frames in the
* directory specified in [path]
* [count] indicates the number of times this part repeats.
* [pause] indicates the number of frames that this part
* should pause for after playing the full sequence but
* before repeating.
*/
do {
end = strstr(line, "\n");
AnimationPart part;
if (headerRead &&
sscanf(line, "%d %d %d", &width, &height, &fps) == 3) {
headerRead = false;
} else if (sscanf(line, "p %d %d %s",
&part.count, &part.pause, part.path)) {
parts.push_back(part);
}
} while (end && *(line = end + 1));
for (uint32_t i = 0; i < parts.size(); i++) {
AnimationPart &part = parts[i];
entry = nullptr;
char search[256];
snprintf(search, sizeof(search), "%s/", part.path);
while ((entry = reader.GetNextEntry(entry))) {
string name = reader.GetEntryName(entry);
if (name.find(search) ||
!entry->GetDataSize() ||
name.length() >= 256)
continue;
part.frames.push_back();
AnimationFrame &frame = part.frames.back();
strcpy(frame.path, name.c_str());
frame.file = reader.GetLocalEntry(entry);
}
sort(part.frames.begin(), part.frames.end());
}
uint32_t frameDelayUs = 1000000 / fps;
for (uint32_t i = 0; i < parts.size(); i++) {
AnimationPart &part = parts[i];
uint32_t j = 0;
while (sRunAnimation && (!part.count || j++ < part.count)) {
for (uint32_t k = 0; k < part.frames.size(); k++) {
struct timeval tv1, tv2;
gettimeofday(&tv1, nullptr);
AnimationFrame &frame = part.frames[k];
if (!frame.buf) {
frame.ReadPngFrame(format);
}
ANativeWindowBuffer *buf;
if (window->dequeueBuffer(window, &buf)) {
LOGW("Failed to get an ANativeWindowBuffer");
break;
}
if (window->lockBuffer(window, buf)) {
LOGW("Failed to lock ANativeWindowBuffer");
window->queueBuffer(window, buf);
break;
}
void *vaddr;
if (grmodule->lock(grmodule, buf->handle,
GRALLOC_USAGE_SW_READ_NEVER |
GRALLOC_USAGE_SW_WRITE_OFTEN |
GRALLOC_USAGE_HW_FB,
0, 0, width, height, &vaddr)) {
LOGW("Failed to lock buffer_handle_t");
window->queueBuffer(window, buf);
break;
}
memcpy(vaddr, frame.buf,
frame.width * frame.height * frame.bytepp);
grmodule->unlock(grmodule, buf->handle);
gettimeofday(&tv2, nullptr);
timersub(&tv2, &tv1, &tv2);
if (tv2.tv_usec < frameDelayUs) {
usleep(frameDelayUs - tv2.tv_usec);
} else {
LOGW("Frame delay is %d us but decoding took %d us", frameDelayUs, tv2.tv_usec);
}
window->queueBuffer(window, buf);
if (part.count && j >= part.count) {
free(frame.buf);
frame.buf = nullptr;
}
}
usleep(frameDelayUs * part.pause);
}
}
return nullptr;
}
static int
CancelBufferNoop(ANativeWindow* aWindow, android_native_buffer_t* aBuffer)
{
return 0;
}
__attribute__ ((visibility ("default")))
FramebufferNativeWindow*
NativeWindow()
{
if (gNativeWindow.get()) {
return gNativeWindow.get();
}
// Some gralloc HALs need this in order to open the
// framebuffer device after we restart with the screen off.
//
// NB: this *must* run BEFORE allocating the
// FramebufferNativeWindow. Do not separate these two C++
// statements.
set_screen_state(1);
// For some devices, it takes a while for the framebuffer to become
// usable. So we wait until the framebuffer has woken up before we
// try to open it.
{
char buf;
int len = 0;
ScopedClose fd(open("/sys/power/wait_for_fb_wake", O_RDONLY, 0));
do {
len = read(fd.get(), &buf, 1);
} while (len < 0 && errno == EINTR);
if (len < 0) {
LOGE("BootAnimation: wait_for_fb_sleep failed errno: %d", errno);
}
}
// We (apparently) don't have a way to tell if allocating the
// fbs succeeded or failed.
gNativeWindow = new FramebufferNativeWindow();
// Bug 776742: FrambufferNativeWindow doesn't set the cancelBuffer
// function pointer, causing EGL to segfault when the window surface
// is destroyed (i.e. on process exit). This workaround stops us
// from hard crashing in that situation.
gNativeWindow->cancelBuffer = CancelBufferNoop;
sRunAnimation = true;
pthread_create(&sAnimationThread, nullptr, AnimationThread, nullptr);
return gNativeWindow.get();
}
__attribute__ ((visibility ("default")))
void
StopBootAnimation()
{
if (sRunAnimation) {
sRunAnimation = false;
pthread_join(sAnimationThread, nullptr);
}
}
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