2 #include <microhttpd.h>
6 #include <libavcodec/avcodec.h>
16 void HTTPD::start(int port)
18 MHD_start_daemon(MHD_USE_THREAD_PER_CONNECTION | MHD_USE_POLL_INTERNALLY | MHD_USE_DUAL_STACK,
21 &answer_to_connection_thunk, this, MHD_OPTION_END);
24 void HTTPD::add_packet(const AVPacket &pkt)
26 for (Stream *stream : streams) {
27 stream->add_packet(pkt);
31 int HTTPD::answer_to_connection_thunk(void *cls, MHD_Connection *connection,
32 const char *url, const char *method,
33 const char *version, const char *upload_data,
34 size_t *upload_data_size, void **con_cls)
36 HTTPD *httpd = (HTTPD *)cls;
37 return httpd->answer_to_connection(connection, url, method, version, upload_data, upload_data_size, con_cls);
40 int HTTPD::answer_to_connection(MHD_Connection *connection,
41 const char *url, const char *method,
42 const char *version, const char *upload_data,
43 size_t *upload_data_size, void **con_cls)
45 printf("url %s\n", url);
46 AVOutputFormat *oformat = av_guess_format("mpegts", nullptr, nullptr);
47 assert(oformat != nullptr);
48 HTTPD::Stream *stream = new HTTPD::Stream(oformat);
49 streams.push_back(stream);
50 MHD_Response *response = MHD_create_response_from_callback(
51 (size_t)-1, 1048576, &HTTPD::Stream::reader_callback_thunk, stream, &HTTPD::free_stream);
52 int ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
53 //MHD_destroy_response(response);
58 void HTTPD::free_stream(void *cls)
60 HTTPD::Stream *stream = (HTTPD::Stream *)cls;
64 HTTPD::Stream::Stream(AVOutputFormat *oformat)
66 avctx = avformat_alloc_context();
67 avctx->oformat = oformat;
68 uint8_t *buf = (uint8_t *)av_malloc(1048576);
69 avctx->pb = avio_alloc_context(buf, 1048576, 1, this, nullptr, &HTTPD::Stream::write_packet_thunk, nullptr);
70 avctx->flags = AVFMT_FLAG_CUSTOM_IO;
72 // TODO: Unify with the code in h264encoder.cpp.
73 AVCodec *codec_video = avcodec_find_encoder(AV_CODEC_ID_H264);
74 avstream_video = avformat_new_stream(avctx, codec_video);
75 if (avstream_video == nullptr) {
76 fprintf(stderr, "avformat_new_stream() failed\n");
79 avstream_video->time_base = AVRational{1, TIMEBASE};
80 avstream_video->codec->width = 1280; // FIXME
81 avstream_video->codec->height = 720; // FIXME
82 avstream_video->codec->time_base = AVRational{1, TIMEBASE};
83 avstream_video->codec->ticks_per_frame = 1; // or 2?
85 AVCodec *codec_audio = avcodec_find_encoder(AV_CODEC_ID_MP3);
86 avstream_audio = avformat_new_stream(avctx, codec_audio);
87 if (avstream_audio == nullptr) {
88 fprintf(stderr, "avformat_new_stream() failed\n");
91 avstream_audio->time_base = AVRational{1, TIMEBASE};
92 avstream_audio->codec->bit_rate = 256000;
93 avstream_audio->codec->sample_rate = 48000;
94 avstream_audio->codec->sample_fmt = AV_SAMPLE_FMT_FLTP;
95 avstream_audio->codec->channels = 2;
96 avstream_audio->codec->channel_layout = AV_CH_LAYOUT_STEREO;
97 avstream_audio->codec->time_base = AVRational{1, TIMEBASE};
99 if (avformat_write_header(avctx, NULL) < 0) {
100 fprintf(stderr, "avformat_write_header() failed\n");
105 HTTPD::Stream::~Stream()
107 avformat_free_context(avctx);
110 ssize_t HTTPD::Stream::reader_callback_thunk(void *cls, uint64_t pos, char *buf, size_t max)
112 HTTPD::Stream *stream = (HTTPD::Stream *)cls;
113 return stream->reader_callback(pos, buf, max);
116 ssize_t HTTPD::Stream::reader_callback(uint64_t pos, char *buf, size_t max)
118 unique_lock<mutex> lock(buffer_mutex);
119 has_buffered_data.wait(lock, [this]{ return !buffered_data.empty(); });
122 while (max > 0 && !buffered_data.empty()) {
123 const string &s = buffered_data.front();
124 assert(s.size() > used_of_buffered_data);
125 size_t len = s.size() - used_of_buffered_data;
127 // Consume the entire (rest of the) string.
128 memcpy(buf, s.data() + used_of_buffered_data, len);
131 buffered_data.pop_front();
132 used_of_buffered_data = 0;
134 // We don't need the entire string; just use the first part of it.
135 memcpy(buf, s.data() + used_of_buffered_data, max);
136 used_of_buffered_data += max;
145 void HTTPD::Stream::add_packet(const AVPacket &pkt)
148 av_copy_packet(&pkt_copy, &pkt);
149 if (pkt.stream_index == 0) {
150 pkt_copy.pts = av_rescale_q(pkt.pts, AVRational{1, TIMEBASE}, avstream_video->time_base);
151 pkt_copy.dts = av_rescale_q(pkt.dts, AVRational{1, TIMEBASE}, avstream_video->time_base);
152 } else if (pkt.stream_index == 1) {
153 pkt_copy.pts = av_rescale_q(pkt.pts, AVRational{1, TIMEBASE}, avstream_audio->time_base);
154 pkt_copy.dts = av_rescale_q(pkt.dts, AVRational{1, TIMEBASE}, avstream_audio->time_base);
159 if (av_interleaved_write_frame(avctx, &pkt_copy) < 0) {
160 fprintf(stderr, "av_interleaved_write_frame() failed\n");
165 int HTTPD::Stream::write_packet_thunk(void *opaque, uint8_t *buf, int buf_size)
167 HTTPD::Stream *stream = (HTTPD::Stream *)opaque;
168 return stream->write_packet(buf, buf_size);
171 int HTTPD::Stream::write_packet(uint8_t *buf, int buf_size)
173 unique_lock<mutex> lock(buffer_mutex);
174 buffered_data.emplace_back((char *)buf, buf_size);
175 has_buffered_data.notify_all();