#include <thread>
#include <vector>
+#include <stdio.h>
+
+extern "C" {
+#include <libavformat/avformat.h>
+#include <libavformat/avio.h>
+}
+
#include "clip_list.h"
#include "defs.h"
+#include "ffmpeg_raii.h"
+#include "httpd.h"
#include "jpeg_frame_view.h"
+#include "mux.h"
#include "player.h"
using namespace std;
extern mutex frame_mu;
extern vector<int64_t> frames[MAX_STREAMS];
+extern HTTPD *global_httpd;
+
+namespace {
+
+string read_file(const string &filename)
+{
+ FILE *fp = fopen(filename.c_str(), "rb");
+ if (fp == nullptr) {
+ perror(filename.c_str());
+ return "";
+ }
+
+ fseek(fp, 0, SEEK_END);
+ long len = ftell(fp);
+ rewind(fp);
+
+ string ret;
+ ret.resize(len);
+ fread(&ret[0], len, 1, fp);
+ fclose(fp);
+ return ret;
+}
+
+} // namespace
void Player::thread_func()
{
for ( ;; ) {
// Wait until we're supposed to play something.
{
- unique_lock<mutex> lock(cue_state_mu);
- cue_is_playing.wait(lock, [this]{
- return cue_state == PLAYING;
- //return current_cue_status.origin != steady_clock::time_point::max();
+ unique_lock<mutex> lock(queue_state_mu);
+ new_clip_changed.wait(lock, [this]{
+ return new_clip_ready && current_clip.pts_in != -1;
});
+ new_clip_ready = false;
+ playing = true;
}
Clip clip;
unsigned stream_idx;
{
- lock_guard<mutex> lock2(mu);
+ lock_guard<mutex> lock(mu);
clip = current_clip;
stream_idx = current_stream_idx;
}
steady_clock::time_point origin = steady_clock::now();
int64_t pts_origin = clip.pts_in;
- int64_t next_pts = pts_origin;
+ int64_t next_pts = pts_origin - 1; // Make sure we play the frame at clip.pts_in if it exists.
+
+ bool aborted = false;
+ for ( ;; ) {
+ // Find the next frame.
+ {
+ lock_guard<mutex> lock(frame_mu);
+ auto it = upper_bound(frames[stream_idx].begin(),
+ frames[stream_idx].end(),
+ next_pts);
+ if (it == frames[stream_idx].end() || *it >= clip.pts_out) {
+ break;
+ }
+ next_pts = *it;
+ }
- bool eof = false;
- while (!eof) { // TODO: check for abort
// FIXME: assumes a given timebase.
double speed = 0.5;
steady_clock::time_point next_frame_start =
origin + microseconds((next_pts - pts_origin) * int(1000000 / speed) / 12800);
- this_thread::sleep_until(next_frame_start);
- destination->setFrame(stream_idx, next_pts);
- // Find the next frame.
+ // Sleep until the next frame start, or until there's a new clip we're supposed to play.
{
- lock_guard<mutex> lock2(frame_mu);
- auto it = upper_bound(frames[stream_idx].begin(),
- frames[stream_idx].end(),
- next_pts);
- if (it == frames[stream_idx].end()) {
- eof = true;
- } else {
- next_pts = *it;
- if (next_pts >= clip.pts_out) {
- eof = true;
- }
+ unique_lock<mutex> lock(queue_state_mu);
+ new_clip_changed.wait_until(lock, next_frame_start, [this]{
+ return new_clip_ready || override_stream_idx != -1;
+ });
+ if (new_clip_ready) break;
+ if (override_stream_idx != -1) {
+ stream_idx = override_stream_idx;
+ override_stream_idx = -1;
+ continue;
}
}
- if (eof) break;
+
+ destination->setFrame(stream_idx, next_pts);
+
+ // Send the frame to the stream.
+ // FIXME: Vaguely less crazy pts, perhaps.
+ double pts_float = fmod(duration<double>(next_frame_start.time_since_epoch()).count(), 86400.0f);
+ int64_t pts = lrint(pts_float * TIMEBASE);
+ string jpeg = read_file(filename_for_frame(stream_idx, next_pts));
+ AVPacket pkt;
+ av_init_packet(&pkt);
+ pkt.stream_index = 0;
+ pkt.data = (uint8_t *)jpeg.data();
+ pkt.size = jpeg.size();
+ stream_mux->add_packet(pkt, pts, pts);
}
{
- unique_lock<mutex> lock(cue_state_mu);
- cue_state = PAUSED;
+ unique_lock<mutex> lock(queue_state_mu);
+ playing = false;
}
-
- if (done_callback != nullptr) {
+ if (done_callback != nullptr && !aborted) {
done_callback();
}
}
Player::Player(JPEGFrameView *destination)
: destination(destination)
{
+ open_output_stream();
thread(&Player::thread_func, this).detach();
}
}
{
- lock_guard<mutex> lock(cue_state_mu);
- cue_state = PLAYING;
- cue_is_playing.notify_all();
+ lock_guard<mutex> lock(queue_state_mu);
+ new_clip_ready = true;
+ override_stream_idx = -1;
+ new_clip_changed.notify_all();
}
}
+
+void Player::override_angle(unsigned stream_idx)
+{
+ // Corner case: If a new clip is waiting to be played, change its stream and then we're done.
+ {
+ unique_lock<mutex> lock(queue_state_mu);
+ if (new_clip_ready) {
+ lock_guard<mutex> lock2(mu);
+ current_stream_idx = stream_idx;
+ return;
+ }
+ }
+
+ // If we are playing a clip, set override_stream_idx, and the player thread will
+ // pick it up and change its internal index.
+ {
+ unique_lock<mutex> lock(queue_state_mu);
+ if (playing) {
+ override_stream_idx = stream_idx;
+ new_clip_changed.notify_all();
+ }
+ }
+
+ // OK, so we're standing still, presumably at the end of a clip.
+ // Look at the current pts_out (if it exists), and show the closest
+ // thing we've got.
+ int64_t pts_out;
+ {
+ lock_guard<mutex> lock(mu);
+ if (current_clip.pts_out < 0) {
+ return;
+ }
+ pts_out = current_clip.pts_out;
+ }
+
+ lock_guard<mutex> lock(frame_mu);
+ auto it = upper_bound(frames[stream_idx].begin(), frames[stream_idx].end(), pts_out);
+ if (it == frames[stream_idx].end()) {
+ return;
+ }
+ destination->setFrame(stream_idx, *it);
+}
+
+void Player::open_output_stream()
+{
+ AVFormatContext *avctx = avformat_alloc_context();
+ avctx->oformat = av_guess_format("nut", nullptr, nullptr);
+
+ uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
+ avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, nullptr, nullptr);
+ avctx->pb->write_data_type = &Player::write_packet2_thunk;
+ avctx->pb->ignore_boundary_point = 1;
+
+ Mux::Codec video_codec = Mux::CODEC_MJPEG;
+
+ avctx->flags = AVFMT_FLAG_CUSTOM_IO;
+
+ string video_extradata;
+
+ constexpr int width = 1280, height = 720; // Doesn't matter for MJPEG.
+ stream_mux.reset(new Mux(avctx, width, height, video_codec, video_extradata, /*audio_codec_parameters=*/nullptr, COARSE_TIMEBASE,
+ /*write_callback=*/nullptr, Mux::WRITE_FOREGROUND, {}));
+}
+
+int Player::write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
+{
+ Player *player = (Player *)opaque;
+ return player->write_packet2(buf, buf_size, type, time);
+}
+
+int Player::write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
+{
+ if (type == AVIO_DATA_MARKER_SYNC_POINT || type == AVIO_DATA_MARKER_BOUNDARY_POINT) {
+ seen_sync_markers = true;
+ } else if (type == AVIO_DATA_MARKER_UNKNOWN && !seen_sync_markers) {
+ // We don't know if this is a keyframe or not (the muxer could
+ // avoid marking it), so we just have to make the best of it.
+ type = AVIO_DATA_MARKER_SYNC_POINT;
+ }
+
+ if (type == AVIO_DATA_MARKER_HEADER) {
+ stream_mux_header.append((char *)buf, buf_size);
+ global_httpd->set_header(stream_mux_header);
+ } else {
+ global_httpd->add_data((char *)buf, buf_size, type == AVIO_DATA_MARKER_SYNC_POINT, time, AVRational{ AV_TIME_BASE, 1 });
+ }
+ return buf_size;
+}
projects / nageru / blobdiff