2 #include <microhttpd.h>
6 #include <libavcodec/avcodec.h>
14 HTTPD::HTTPD(const char *output_filename, int width, int height)
15 : width(width), height(height)
17 AVFormatContext *avctx = avformat_alloc_context();
18 avctx->oformat = av_guess_format(NULL, output_filename, NULL);
19 strcpy(avctx->filename, output_filename);
20 if (avio_open2(&avctx->pb, output_filename, AVIO_FLAG_WRITE, &avctx->interrupt_callback, NULL) < 0) {
21 fprintf(stderr, "%s: avio_open2() failed\n", output_filename);
25 file_mux.reset(new Mux(avctx, width, height));
28 void HTTPD::start(int port)
30 MHD_start_daemon(MHD_USE_THREAD_PER_CONNECTION | MHD_USE_POLL_INTERNALLY | MHD_USE_DUAL_STACK,
33 &answer_to_connection_thunk, this, MHD_OPTION_END);
36 void HTTPD::add_packet(const AVPacket &pkt, int64_t pts, int64_t dts)
38 for (Stream *stream : streams) {
39 stream->add_packet(pkt, pts, dts);
41 file_mux->add_packet(pkt, pts, dts);
44 int HTTPD::answer_to_connection_thunk(void *cls, MHD_Connection *connection,
45 const char *url, const char *method,
46 const char *version, const char *upload_data,
47 size_t *upload_data_size, void **con_cls)
49 HTTPD *httpd = (HTTPD *)cls;
50 return httpd->answer_to_connection(connection, url, method, version, upload_data, upload_data_size, con_cls);
53 int HTTPD::answer_to_connection(MHD_Connection *connection,
54 const char *url, const char *method,
55 const char *version, const char *upload_data,
56 size_t *upload_data_size, void **con_cls)
58 printf("url %s\n", url);
59 AVOutputFormat *oformat = av_guess_format("mpegts", nullptr, nullptr);
60 assert(oformat != nullptr);
61 HTTPD::Stream *stream = new HTTPD::Stream(oformat, width, height);
62 streams.push_back(stream);
63 MHD_Response *response = MHD_create_response_from_callback(
64 (size_t)-1, 1048576, &HTTPD::Stream::reader_callback_thunk, stream, &HTTPD::free_stream);
65 int ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
66 //MHD_destroy_response(response);
71 void HTTPD::free_stream(void *cls)
73 HTTPD::Stream *stream = (HTTPD::Stream *)cls;
77 HTTPD::Mux::Mux(AVFormatContext *avctx, int width, int height)
80 AVCodec *codec_video = avcodec_find_encoder(AV_CODEC_ID_H264);
81 avstream_video = avformat_new_stream(avctx, codec_video);
82 if (avstream_video == nullptr) {
83 fprintf(stderr, "avformat_new_stream() failed\n");
86 avstream_video->time_base = AVRational{1, TIMEBASE};
87 avstream_video->codec->width = width;
88 avstream_video->codec->height = height;
89 avstream_video->codec->time_base = AVRational{1, TIMEBASE};
90 avstream_video->codec->ticks_per_frame = 1; // or 2?
92 AVCodec *codec_audio = avcodec_find_encoder(AV_CODEC_ID_MP3);
93 avstream_audio = avformat_new_stream(avctx, codec_audio);
94 if (avstream_audio == nullptr) {
95 fprintf(stderr, "avformat_new_stream() failed\n");
98 avstream_audio->time_base = AVRational{1, TIMEBASE};
99 avstream_audio->codec->bit_rate = 256000;
100 avstream_audio->codec->sample_rate = 48000;
101 avstream_audio->codec->sample_fmt = AV_SAMPLE_FMT_FLTP;
102 avstream_audio->codec->channels = 2;
103 avstream_audio->codec->channel_layout = AV_CH_LAYOUT_STEREO;
104 avstream_audio->codec->time_base = AVRational{1, TIMEBASE};
106 if (avformat_write_header(avctx, NULL) < 0) {
107 fprintf(stderr, "avformat_write_header() failed\n");
114 av_write_trailer(avctx);
115 avformat_free_context(avctx);
118 void HTTPD::Mux::add_packet(const AVPacket &pkt, int64_t pts, int64_t dts)
121 av_copy_packet(&pkt_copy, &pkt);
122 if (pkt.stream_index == 0) {
123 pkt_copy.pts = av_rescale_q(pts, AVRational{1, TIMEBASE}, avstream_video->time_base);
124 pkt_copy.dts = av_rescale_q(dts, AVRational{1, TIMEBASE}, avstream_video->time_base);
125 } else if (pkt.stream_index == 1) {
126 pkt_copy.pts = av_rescale_q(pts, AVRational{1, TIMEBASE}, avstream_audio->time_base);
127 pkt_copy.dts = av_rescale_q(dts, AVRational{1, TIMEBASE}, avstream_audio->time_base);
132 if (av_interleaved_write_frame(avctx, &pkt_copy) < 0) {
133 fprintf(stderr, "av_interleaved_write_frame() failed\n");
138 HTTPD::Stream::Stream(AVOutputFormat *oformat, int width, int height)
140 AVFormatContext *avctx = avformat_alloc_context();
141 avctx->oformat = oformat;
142 uint8_t *buf = (uint8_t *)av_malloc(1048576);
143 avctx->pb = avio_alloc_context(buf, 1048576, 1, this, nullptr, &HTTPD::Stream::write_packet_thunk, nullptr);
144 avctx->flags = AVFMT_FLAG_CUSTOM_IO;
146 mux.reset(new Mux(avctx, width, height));
149 ssize_t HTTPD::Stream::reader_callback_thunk(void *cls, uint64_t pos, char *buf, size_t max)
151 HTTPD::Stream *stream = (HTTPD::Stream *)cls;
152 return stream->reader_callback(pos, buf, max);
155 ssize_t HTTPD::Stream::reader_callback(uint64_t pos, char *buf, size_t max)
157 unique_lock<mutex> lock(buffer_mutex);
158 has_buffered_data.wait(lock, [this]{ return !buffered_data.empty(); });
161 while (max > 0 && !buffered_data.empty()) {
162 const string &s = buffered_data.front();
163 assert(s.size() > used_of_buffered_data);
164 size_t len = s.size() - used_of_buffered_data;
166 // Consume the entire (rest of the) string.
167 memcpy(buf, s.data() + used_of_buffered_data, len);
170 buffered_data.pop_front();
171 used_of_buffered_data = 0;
173 // We don't need the entire string; just use the first part of it.
174 memcpy(buf, s.data() + used_of_buffered_data, max);
175 used_of_buffered_data += max;
184 void HTTPD::Stream::add_packet(const AVPacket &pkt, int64_t pts, int64_t dts)
186 mux->add_packet(pkt, pts, dts);
189 int HTTPD::Stream::write_packet_thunk(void *opaque, uint8_t *buf, int buf_size)
191 HTTPD::Stream *stream = (HTTPD::Stream *)opaque;
192 return stream->write_packet(buf, buf_size);
195 int HTTPD::Stream::write_packet(uint8_t *buf, int buf_size)
197 unique_lock<mutex> lock(buffer_mutex);
198 buffered_data.emplace_back((char *)buf, buf_size);
199 has_buffered_data.notify_all();