#include "image_input.h"
+#include <errno.h>
#include <movit/image_format.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
+#include <libavutil/avutil.h>
+#include <libavutil/error.h>
+#include <libavutil/frame.h>
#include <libavutil/imgutils.h>
+#include <libavutil/mem.h>
#include <libavutil/pixfmt.h>
#include <libswscale/swscale.h>
}
-#include <sys/types.h>
+#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
-#include <fcntl.h>
-
+#include <cstddef>
+#include <functional>
#include <mutex>
#include <thread>
+#include <utility>
+#include <vector>
+#include "ffmpeg_raii.h"
#include "flags.h"
+#include "flat_input.h"
+
+struct SwsContext;
using namespace std;
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),
pathname(search_for_file(filename)),
- current_image(load_image(pathname))
+ current_image(load_image(filename, pathname))
{
if (current_image == nullptr) { // Could happen even though search_for_file() returned.
fprintf(stderr, "Couldn't load image, exiting.\n");
movit::FlatInput::set_gl_state(glsl_program_num, prefix, sampler_num);
}
-shared_ptr<const ImageInput::Image> ImageInput::load_image(const string &pathname)
+shared_ptr<const ImageInput::Image> ImageInput::load_image(const string &filename, const string &pathname)
{
unique_lock<mutex> lock(all_images_lock); // Held also during loading.
if (all_images.count(pathname)) {
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));
+ thread(bind(update_thread_func, filename, pathname, first_modified));
return all_images[pathname];
}
-// Some helpers to make RAII versions of FFmpeg objects.
-// The cleanup functions don't interact all that well with unique_ptr,
-// so things get a bit messy and verbose, but overall it's worth it to ensure
-// we never leak things by accident in error paths.
-
-namespace {
-
-void avformat_close_input_unique(AVFormatContext *format_ctx)
-{
- avformat_close_input(&format_ctx);
-}
-
-unique_ptr<AVFormatContext, decltype(avformat_close_input_unique)*>
-avformat_open_input_unique(const char *pathname,
- AVInputFormat *fmt, AVDictionary **options)
-{
- AVFormatContext *format_ctx = nullptr;
- if (avformat_open_input(&format_ctx, pathname, fmt, options) != 0) {
- format_ctx = nullptr;
- }
- return unique_ptr<AVFormatContext, decltype(avformat_close_input_unique)*>(
- format_ctx, avformat_close_input_unique);
-}
-
-void av_frame_free_unique(AVFrame *frame)
-{
- av_frame_free(&frame);
-}
-
-unique_ptr<AVFrame, decltype(av_frame_free_unique)*>
-av_frame_alloc_unique()
-{
- AVFrame *frame = av_frame_alloc();
- return unique_ptr<AVFrame, decltype(av_frame_free_unique)*>(
- frame, av_frame_free_unique);
-}
-
-} // namespace
-
shared_ptr<const ImageInput::Image> ImageInput::load_image_raw(const string &pathname)
{
// Note: Call before open, not after; otherwise, there's a race.
return nullptr;
}
- AVCodecContext *codec_ctx = format_ctx->streams[stream_index]->codec;
- AVCodec *codec = avcodec_find_decoder(codec_ctx->codec_id);
+ const AVCodecParameters *codecpar = format_ctx->streams[stream_index]->codecpar;
+ AVCodecContextWithDeleter codec_ctx = avcodec_alloc_context3_unique(nullptr);
+ if (avcodec_parameters_to_context(codec_ctx.get(), codecpar) < 0) {
+ fprintf(stderr, "%s: Cannot fill codec parameters\n", pathname.c_str());
+ return nullptr;
+ }
+ AVCodec *codec = avcodec_find_decoder(codecpar->codec_id);
if (codec == nullptr) {
fprintf(stderr, "%s: Cannot find decoder\n", pathname.c_str());
return nullptr;
}
- if (avcodec_open2(codec_ctx, codec, nullptr) < 0) {
+ if (avcodec_open2(codec_ctx.get(), codec, nullptr) < 0) {
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);
+ codec_ctx.get(), avcodec_close);
// Read packets until we have a frame or there are none left.
int frame_finished = 0;
- auto frame = av_frame_alloc_unique();
+ AVFrameWithDeleter frame = av_frame_alloc_unique();
+ bool eof = false;
do {
AVPacket pkt;
unique_ptr<AVPacket, decltype(av_packet_unref)*> pkt_cleanup(
av_init_packet(&pkt);
pkt.data = nullptr;
pkt.size = 0;
- if (av_read_frame(format_ctx.get(), &pkt) < 0) {
- break;
- }
- if (pkt.stream_index != stream_index) {
- continue;
+ if (av_read_frame(format_ctx.get(), &pkt) == 0) {
+ if (pkt.stream_index != stream_index) {
+ continue;
+ }
+ if (avcodec_send_packet(codec_ctx.get(), &pkt) < 0) {
+ fprintf(stderr, "%s: Cannot send packet to codec.\n", pathname.c_str());
+ return nullptr;
+ }
+ } else {
+ eof = true; // Or error, but ignore that for the time being.
}
- if (avcodec_decode_video2(codec_ctx, frame.get(), &frame_finished, &pkt) < 0) {
- fprintf(stderr, "%s: Cannot decode frame\n", pathname.c_str());
+ int err = avcodec_receive_frame(codec_ctx.get(), frame.get());
+ if (err == 0) {
+ frame_finished = true;
+ break;
+ } else if (err != AVERROR(EAGAIN)) {
+ fprintf(stderr, "%s: Cannot receive frame from codec.\n", pathname.c_str());
return nullptr;
}
- } while (!frame_finished);
+ } while (!eof);
- // 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;
// Fire up a thread to update the image every second.
// We could do inotify, but this is good enough for now.
-void ImageInput::update_thread_func(const std::string &pathname, const timespec &first_modified)
+void ImageInput::update_thread_func(const std::string &filename, const std::string &pathname, const timespec &first_modified)
{
+ char thread_name[16];
+ snprintf(thread_name, sizeof(thread_name), "Update_%s", filename.c_str());
+ pthread_setname_np(pthread_self(), thread_name);
+
timespec last_modified = first_modified;
struct stat buf;
for ( ;; ) {
projects / nageru / blobdiff