X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=httpd.cpp;h=ed46f52566832d6faa1ac63e0edfe071d8030e6b;hb=8348925c4cb0d7a73b07db03c6bc6d55fa0631b8;hp=f266c63656d17cb14cce47c4886573159d61e5da;hpb=be250b0bb36e5cca60feb810461c116495bcc357;p=nageru diff --git a/httpd.cpp b/httpd.cpp index f266c63..ed46f52 100644 --- a/httpd.cpp +++ b/httpd.cpp @@ -1,28 +1,24 @@ -#include -#include #include +#include +#include +#include +#include -extern "C" { -#include -} +#include #include "httpd.h" + +#include "defs.h" +#include "flags.h" #include "timebase.h" +struct MHD_Connection; +struct MHD_Response; + using namespace std; -HTTPD::HTTPD(const char *output_filename, int width, int height) - : width(width), height(height) +HTTPD::HTTPD() { - AVFormatContext *avctx = avformat_alloc_context(); - avctx->oformat = av_guess_format(NULL, output_filename, NULL); - strcpy(avctx->filename, output_filename); - if (avio_open2(&avctx->pb, output_filename, AVIO_FLAG_WRITE, &avctx->interrupt_callback, NULL) < 0) { - fprintf(stderr, "%s: avio_open2() failed\n", output_filename); - exit(1); - } - - file_mux.reset(new Mux(avctx, width, height)); } void HTTPD::start(int port) @@ -30,15 +26,17 @@ void HTTPD::start(int port) MHD_start_daemon(MHD_USE_THREAD_PER_CONNECTION | MHD_USE_POLL_INTERNALLY | MHD_USE_DUAL_STACK, port, nullptr, nullptr, - &answer_to_connection_thunk, this, MHD_OPTION_END); + &answer_to_connection_thunk, this, + MHD_OPTION_NOTIFY_COMPLETED, &request_completed_thunk, this, + MHD_OPTION_END); } -void HTTPD::add_packet(const AVPacket &pkt, int64_t pts, int64_t dts) +void HTTPD::add_data(const char *buf, size_t size, bool keyframe) { + unique_lock lock(streams_mutex); for (Stream *stream : streams) { - stream->add_packet(pkt, pts, dts); + stream->add_data(buf, size, keyframe ? Stream::DATA_TYPE_KEYFRAME : Stream::DATA_TYPE_OTHER); } - file_mux->add_packet(pkt, pts, dts); } int HTTPD::answer_to_connection_thunk(void *cls, MHD_Connection *connection, @@ -55,13 +53,17 @@ int HTTPD::answer_to_connection(MHD_Connection *connection, const char *version, const char *upload_data, size_t *upload_data_size, void **con_cls) { - printf("url %s\n", url); - AVOutputFormat *oformat = av_guess_format("mpegts", nullptr, nullptr); - assert(oformat != nullptr); - HTTPD::Stream *stream = new HTTPD::Stream(oformat, width, height); - streams.push_back(stream); + HTTPD::Stream *stream = new HTTPD::Stream; + stream->add_data(header.data(), header.size(), Stream::DATA_TYPE_HEADER); + { + unique_lock lock(streams_mutex); + streams.insert(stream); + } + *con_cls = stream; + + // Does not strictly have to be equal to MUX_BUFFER_SIZE. MHD_Response *response = MHD_create_response_from_callback( - (size_t)-1, 1048576, &HTTPD::Stream::reader_callback_thunk, stream, &HTTPD::free_stream); + (size_t)-1, MUX_BUFFER_SIZE, &HTTPD::Stream::reader_callback_thunk, stream, &HTTPD::free_stream); int ret = MHD_queue_response(connection, MHD_HTTP_OK, response); //MHD_destroy_response(response); @@ -70,93 +72,32 @@ int HTTPD::answer_to_connection(MHD_Connection *connection, void HTTPD::free_stream(void *cls) { + // FIXME: When is this actually called, if ever? + // Also, shouldn't we remove it from streams? HTTPD::Stream *stream = (HTTPD::Stream *)cls; delete stream; } -HTTPD::Mux::Mux(AVFormatContext *avctx, int width, int height) - : avctx(avctx) -{ - AVCodec *codec_video = avcodec_find_encoder(AV_CODEC_ID_H264); - avstream_video = avformat_new_stream(avctx, codec_video); - if (avstream_video == nullptr) { - fprintf(stderr, "avformat_new_stream() failed\n"); - exit(1); - } - avstream_video->time_base = AVRational{1, TIMEBASE}; - avstream_video->codec->width = width; - avstream_video->codec->height = height; - avstream_video->codec->time_base = AVRational{1, TIMEBASE}; - avstream_video->codec->ticks_per_frame = 1; // or 2? - - // Colorspace details. Closely correspond to settings in EffectChain_finalize, - // as noted in each comment. - // Note that the H.264 stream also contains this information and depending on the - // mux, this might simply get ignored. See sps_rbsp(). - avstream_video->codec->color_primaries = AVCOL_PRI_BT709; // RGB colorspace (inout_format.color_space). - avstream_video->codec->color_trc = AVCOL_TRC_UNSPECIFIED; // Gamma curve (inout_format.gamma_curve). - avstream_video->codec->colorspace = AVCOL_SPC_SMPTE170M; // YUV colorspace (output_ycbcr_format.luma_coefficients). - avstream_video->codec->color_range = AVCOL_RANGE_MPEG; // Full vs. limited range (output_ycbcr_format.full_range). - avstream_video->codec->chroma_sample_location = AVCHROMA_LOC_LEFT; // Chroma sample location. See chroma_offset_0[] in Mixer::subsample_chroma(). - avstream_video->codec->field_order = AV_FIELD_PROGRESSIVE; - - AVCodec *codec_audio = avcodec_find_encoder(AV_CODEC_ID_MP3); - avstream_audio = avformat_new_stream(avctx, codec_audio); - if (avstream_audio == nullptr) { - fprintf(stderr, "avformat_new_stream() failed\n"); - exit(1); - } - avstream_audio->time_base = AVRational{1, TIMEBASE}; - avstream_audio->codec->bit_rate = 256000; - avstream_audio->codec->sample_rate = 48000; - avstream_audio->codec->sample_fmt = AV_SAMPLE_FMT_FLTP; - avstream_audio->codec->channels = 2; - avstream_audio->codec->channel_layout = AV_CH_LAYOUT_STEREO; - avstream_audio->codec->time_base = AVRational{1, TIMEBASE}; - - if (avformat_write_header(avctx, NULL) < 0) { - fprintf(stderr, "avformat_write_header() failed\n"); - exit(1); - } -} - -HTTPD::Mux::~Mux() +void HTTPD::request_completed_thunk(void *cls, struct MHD_Connection *connection, void **con_cls, enum MHD_RequestTerminationCode toe) { - av_write_trailer(avctx); - avformat_free_context(avctx); + HTTPD *httpd = (HTTPD *)cls; + return httpd->request_completed(connection, con_cls, toe); } -void HTTPD::Mux::add_packet(const AVPacket &pkt, int64_t pts, int64_t dts) +void HTTPD::request_completed(struct MHD_Connection *connection, void **con_cls, enum MHD_RequestTerminationCode toe) { - AVPacket pkt_copy; - av_copy_packet(&pkt_copy, &pkt); - if (pkt.stream_index == 0) { - pkt_copy.pts = av_rescale_q(pts, AVRational{1, TIMEBASE}, avstream_video->time_base); - pkt_copy.dts = av_rescale_q(dts, AVRational{1, TIMEBASE}, avstream_video->time_base); - } else if (pkt.stream_index == 1) { - pkt_copy.pts = av_rescale_q(pts, AVRational{1, TIMEBASE}, avstream_audio->time_base); - pkt_copy.dts = av_rescale_q(dts, AVRational{1, TIMEBASE}, avstream_audio->time_base); - } else { - assert(false); + if (con_cls == nullptr) { + // Request was never set up. + return; } - - if (av_interleaved_write_frame(avctx, &pkt_copy) < 0) { - fprintf(stderr, "av_interleaved_write_frame() failed\n"); - exit(1); + HTTPD::Stream *stream = (HTTPD::Stream *)*con_cls; + { + unique_lock lock(streams_mutex); + delete stream; + streams.erase(stream); } } -HTTPD::Stream::Stream(AVOutputFormat *oformat, int width, int height) -{ - AVFormatContext *avctx = avformat_alloc_context(); - avctx->oformat = oformat; - uint8_t *buf = (uint8_t *)av_malloc(1048576); - avctx->pb = avio_alloc_context(buf, 1048576, 1, this, nullptr, &HTTPD::Stream::write_packet_thunk, nullptr); - avctx->flags = AVFMT_FLAG_CUSTOM_IO; - - mux.reset(new Mux(avctx, width, height)); -} - ssize_t HTTPD::Stream::reader_callback_thunk(void *cls, uint64_t pos, char *buf, size_t max) { HTTPD::Stream *stream = (HTTPD::Stream *)cls; @@ -176,6 +117,7 @@ ssize_t HTTPD::Stream::reader_callback(uint64_t pos, char *buf, size_t max) if (max >= len) { // Consume the entire (rest of the) string. memcpy(buf, s.data() + used_of_buffered_data, len); + buf += len; ret += len; max -= len; buffered_data.pop_front(); @@ -183,6 +125,7 @@ ssize_t HTTPD::Stream::reader_callback(uint64_t pos, char *buf, size_t max) } else { // We don't need the entire string; just use the first part of it. memcpy(buf, s.data() + used_of_buffered_data, max); + buf += max; used_of_buffered_data += max; ret += max; max = 0; @@ -192,22 +135,20 @@ ssize_t HTTPD::Stream::reader_callback(uint64_t pos, char *buf, size_t max) return ret; } -void HTTPD::Stream::add_packet(const AVPacket &pkt, int64_t pts, int64_t dts) +void HTTPD::Stream::add_data(const char *buf, size_t buf_size, HTTPD::Stream::DataType data_type) { - mux->add_packet(pkt, pts, dts); -} - -int HTTPD::Stream::write_packet_thunk(void *opaque, uint8_t *buf, int buf_size) -{ - HTTPD::Stream *stream = (HTTPD::Stream *)opaque; - return stream->write_packet(buf, buf_size); -} + if (buf_size == 0) { + return; + } + if (data_type == DATA_TYPE_KEYFRAME) { + seen_keyframe = true; + } else if (data_type == DATA_TYPE_OTHER && !seen_keyframe) { + // Start sending only once we see a keyframe. + return; + } -int HTTPD::Stream::write_packet(uint8_t *buf, int buf_size) -{ unique_lock lock(buffer_mutex); - buffered_data.emplace_back((char *)buf, buf_size); + buffered_data.emplace_back(buf, buf_size); has_buffered_data.notify_all(); - return buf_size; }