#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
+#include <fcntl.h>
#include <mutex>
#include <thread>
+#include "flags.h"
+
using namespace std;
+namespace {
+
+string search_for_file(const string &filename)
+{
+ // Look for the file in all theme_dirs until we find one;
+ // that will be the permanent resolution of this file, whether
+ // it is actually valid or not.
+ // We store errors from all the attempts, and show them
+ // once we know we can't find any of them.
+ vector<string> errors;
+ for (const string &dir : global_flags.theme_dirs) {
+ string pathname = dir + "/" + filename;
+ if (access(pathname.c_str(), O_RDONLY) == 0) {
+ return pathname;
+ } else {
+ char buf[512];
+ snprintf(buf, sizeof(buf), "%s: %s", pathname.c_str(), strerror(errno));
+ errors.push_back(buf);
+ }
+ }
+
+ for (const string &error : errors) {
+ fprintf(stderr, "%s\n", error.c_str());
+ }
+ fprintf(stderr, "Couldn't find %s in any directory in --theme-dirs, exiting.\n",
+ filename.c_str());
+ exit(1);
+}
+
+} // namespace
+
ImageInput::ImageInput(const string &filename)
: movit::FlatInput({movit::COLORSPACE_sRGB, movit::GAMMA_sRGB}, movit::FORMAT_RGBA_POSTMULTIPLIED_ALPHA,
GL_UNSIGNED_BYTE, 1280, 720), // FIXME
- filename(filename),
- current_image(load_image(filename))
+ pathname(search_for_file(filename)),
+ current_image(load_image(pathname))
{
- if (current_image == nullptr) {
+ if (current_image == nullptr) { // Could happen even though search_for_file() returned.
fprintf(stderr, "Couldn't load image, exiting.\n");
exit(1);
}
// is mostly there to save startup time, not RAM).
{
unique_lock<mutex> lock(all_images_lock);
- if (all_images[filename] != current_image) {
- current_image = all_images[filename];
+ if (all_images[pathname] != current_image) {
+ current_image = all_images[pathname];
set_pixel_data(current_image->pixels.get());
}
}
movit::FlatInput::set_gl_state(glsl_program_num, prefix, sampler_num);
}
-shared_ptr<const ImageInput::Image> ImageInput::load_image(const string &filename)
+shared_ptr<const ImageInput::Image> ImageInput::load_image(const string &pathname)
{
unique_lock<mutex> lock(all_images_lock); // Held also during loading.
- if (all_images.count(filename)) {
- return all_images[filename];
+ if (all_images.count(pathname)) {
+ return all_images[pathname];
}
- all_images[filename] = load_image_raw(filename);
- timespec first_modified = all_images[filename]->last_modified;
- update_threads[filename] =
- thread(bind(update_thread_func, filename, first_modified));
+ all_images[pathname] = load_image_raw(pathname);
+ timespec first_modified = all_images[pathname]->last_modified;
+ update_threads[pathname] =
+ thread(bind(update_thread_func, pathname, first_modified));
- return all_images[filename];
+ return all_images[pathname];
}
// Some helpers to make RAII versions of FFmpeg objects.
}
unique_ptr<AVFormatContext, decltype(avformat_close_input_unique)*>
-avformat_open_input_unique(const char *filename,
+avformat_open_input_unique(const char *pathname,
AVInputFormat *fmt, AVDictionary **options)
{
AVFormatContext *format_ctx = nullptr;
- if (avformat_open_input(&format_ctx, filename, fmt, options) != 0) {
+ if (avformat_open_input(&format_ctx, pathname, fmt, options) != 0) {
format_ctx = nullptr;
}
return unique_ptr<AVFormatContext, decltype(avformat_close_input_unique)*>(
} // namespace
-shared_ptr<const ImageInput::Image> ImageInput::load_image_raw(const string &filename)
+shared_ptr<const ImageInput::Image> ImageInput::load_image_raw(const string &pathname)
{
// Note: Call before open, not after; otherwise, there's a race.
// (There is now, too, but it tips the correct way. We could use fstat()
// if we had the file descriptor.)
struct stat buf;
- if (stat(filename.c_str(), &buf) != 0) {
- fprintf(stderr, "%s: Error stat-ing file\n", filename.c_str());
+ if (stat(pathname.c_str(), &buf) != 0) {
+ fprintf(stderr, "%s: Error stat-ing file\n", pathname.c_str());
return nullptr;
}
timespec last_modified = buf.st_mtim;
- auto format_ctx = avformat_open_input_unique(filename.c_str(), nullptr, nullptr);
+ auto format_ctx = avformat_open_input_unique(pathname.c_str(), nullptr, nullptr);
if (format_ctx == nullptr) {
- fprintf(stderr, "%s: Error opening file\n", filename.c_str());
+ fprintf(stderr, "%s: Error opening file\n", pathname.c_str());
return nullptr;
}
if (avformat_find_stream_info(format_ctx.get(), nullptr) < 0) {
- fprintf(stderr, "%s: Error finding stream info\n", filename.c_str());
+ fprintf(stderr, "%s: Error finding stream info\n", pathname.c_str());
return nullptr;
}
}
}
if (stream_index == -1) {
- fprintf(stderr, "%s: No video stream found\n", filename.c_str());
+ fprintf(stderr, "%s: No video stream found\n", pathname.c_str());
return nullptr;
}
AVCodecContext *codec_ctx = format_ctx->streams[stream_index]->codec;
AVCodec *codec = avcodec_find_decoder(codec_ctx->codec_id);
if (codec == nullptr) {
- fprintf(stderr, "%s: Cannot find decoder\n", filename.c_str());
+ fprintf(stderr, "%s: Cannot find decoder\n", pathname.c_str());
return nullptr;
}
if (avcodec_open2(codec_ctx, codec, nullptr) < 0) {
- fprintf(stderr, "%s: Cannot open decoder\n", filename.c_str());
+ fprintf(stderr, "%s: Cannot open decoder\n", pathname.c_str());
return nullptr;
}
unique_ptr<AVCodecContext, decltype(avcodec_close)*> codec_ctx_cleanup(
codec_ctx, avcodec_close);
- // Read packets until we have a frame.
+ // Read packets until we have a frame or there are none left.
int frame_finished = 0;
auto frame = av_frame_alloc_unique();
do {
pkt.data = nullptr;
pkt.size = 0;
if (av_read_frame(format_ctx.get(), &pkt) < 0) {
- fprintf(stderr, "%s: Cannot read frame\n", filename.c_str());
- return nullptr;
+ break;
}
if (pkt.stream_index != stream_index) {
continue;
}
if (avcodec_decode_video2(codec_ctx, frame.get(), &frame_finished, &pkt) < 0) {
- fprintf(stderr, "%s: Cannot decode frame\n", filename.c_str());
+ fprintf(stderr, "%s: Cannot decode frame\n", pathname.c_str());
return nullptr;
}
} while (!frame_finished);
+ // See if there's a cached frame for us.
+ if (!frame_finished) {
+ AVPacket pkt;
+ pkt.data = nullptr;
+ pkt.size = 0;
+ if (avcodec_decode_video2(codec_ctx, frame.get(), &frame_finished, &pkt) < 0) {
+ fprintf(stderr, "%s: Cannot decode frame\n", pathname.c_str());
+ return nullptr;
+ }
+ }
+ if (!frame_finished) {
+ fprintf(stderr, "%s: Decoder did not output frame.\n", pathname.c_str());
+ return nullptr;
+ }
+
// TODO: Scale down if needed!
uint8_t *pic_data[4] = {nullptr};
unique_ptr<uint8_t *, decltype(av_freep)*> pic_data_cleanup(
&pic_data[0], av_freep);
int linesizes[4];
if (av_image_alloc(pic_data, linesizes, frame->width, frame->height, AV_PIX_FMT_RGBA, 1) < 0) {
- fprintf(stderr, "%s: Could not allocate picture data\n", filename.c_str());
+ fprintf(stderr, "%s: Could not allocate picture data\n", pathname.c_str());
return nullptr;
}
unique_ptr<SwsContext, decltype(sws_freeContext)*> sws_ctx(
AV_PIX_FMT_RGBA, SWS_BICUBIC, nullptr, nullptr, nullptr),
sws_freeContext);
if (sws_ctx == nullptr) {
- fprintf(stderr, "%s: Could not create scaler context\n", filename.c_str());
+ fprintf(stderr, "%s: Could not create scaler context\n", pathname.c_str());
return nullptr;
}
sws_scale(sws_ctx.get(), frame->data, frame->linesize, 0, frame->height, pic_data, linesizes);
// Fire up a thread to update the image every second.
// We could do inotify, but this is good enough for now.
-// TODO: These don't really quit, ever. Should they?
-void ImageInput::update_thread_func(const std::string &filename, const timespec &first_modified)
+void ImageInput::update_thread_func(const std::string &pathname, const timespec &first_modified)
{
timespec last_modified = first_modified;
struct stat buf;
for ( ;; ) {
sleep(1);
- if (stat(filename.c_str(), &buf) != 0) {
- fprintf(stderr, "%s: Couldn't check for new version, leaving the old in place.\n", filename.c_str());
+ if (threads_should_quit) {
+ return;
+ }
+
+ if (stat(pathname.c_str(), &buf) != 0) {
+ fprintf(stderr, "%s: Couldn't check for new version, leaving the old in place.\n", pathname.c_str());
continue;
}
if (buf.st_mtim.tv_sec == last_modified.tv_sec &&
// Not changed.
continue;
}
- shared_ptr<const Image> image = load_image_raw(filename);
+ shared_ptr<const Image> image = load_image_raw(pathname);
if (image == nullptr) {
fprintf(stderr, "Couldn't load image, leaving the old in place.\n");
continue;
}
- fprintf(stderr, "Loaded new version of %s from disk.\n", filename.c_str());
+ fprintf(stderr, "Loaded new version of %s from disk.\n", pathname.c_str());
unique_lock<mutex> lock(all_images_lock);
- all_images[filename] = image;
+ all_images[pathname] = image;
last_modified = image->last_modified;
}
}
+void ImageInput::shutdown_updaters()
+{
+ // TODO: Kick these out of the sleep before one second?
+ threads_should_quit = true;
+
+ for (auto &it : update_threads) {
+ it.second.join();
+ }
+}
+
mutex ImageInput::all_images_lock;
map<string, shared_ptr<const ImageInput::Image>> ImageInput::all_images;
map<string, thread> ImageInput::update_threads;
+volatile bool ImageInput::threads_should_quit = false;
projects / nageru / blobdiff