Make it possible to siphon out a single MJPEG stream.

[nageru] / nageru / mjpeg_encoder.h

diff --git a/nageru/mjpeg_encoder.h b/nageru/mjpeg_encoder.h
index 8a0d8fadb6b198fc8e6e2104eb8da41da2e17ce1..6ba7f0381bad3a1f3f1ec879e07cf44dcaf7260b 100644 (file)
--- a/nageru/mjpeg_encoder.h
+++ b/nageru/mjpeg_encoder.h
@@ -1,7 +1,9 @@
 #ifndef _MJPEG_ENCODER_H
 #define _MJPEG_ENCODER_H 1
 
+#include "defs.h"
 #include "shared/ffmpeg_raii.h"
+#include "shared/httpd.h"
 #include "ref_counted_frame.h"
 
 extern "C" {
@@ -23,7 +25,6 @@ extern "C" {
 #include <movit/effect.h>
 #include <va/va.h>
 
-class HTTPD;
 struct jpeg_compress_struct;
 struct VADisplayWithCleanup;
 struct VectorDestinationManager;
@@ -42,8 +43,7 @@ public:
        void upload_frame(int64_t pts, unsigned card_index, RefCountedFrame frame, const bmusb::VideoFormat &video_format, size_t y_offset, size_t cbcr_offset, std::vector<int32_t> audio, const movit::RGBTriplet &white_balance);
        bool using_vaapi() const { return va_dpy != nullptr; }
 
-       // Returns -1 for inactive (ie., don't encode frames for this card right now).
-       int get_mjpeg_stream_for_card(unsigned card_index);
+       bool should_encode_mjpeg_for_card(unsigned card_index);
 
 private:
        static constexpr int quality = 90;
@@ -117,13 +117,21 @@ private:
        void va_receiver_thread_func();
        void encode_jpeg_va(QueuedFrame &&qf);
        std::vector<uint8_t> encode_jpeg_libjpeg(const QueuedFrame &qf);
-       void write_mjpeg_packet(int64_t pts, unsigned card_index, const uint8_t *jpeg, size_t jpeg_size);
-       void write_audio_packet(int64_t pts, unsigned card_index, const std::vector<int32_t> &audio);
+       void write_mjpeg_packet(AVFormatContext *avctx, int64_t pts, unsigned stream_index, const uint8_t *jpeg, size_t jpeg_size);
+       void write_audio_packet(AVFormatContext *avctx, int64_t pts, unsigned stream_index, const std::vector<int32_t> &audio);
        void init_jpeg_422(unsigned width, unsigned height, const movit::RGBTriplet &white_balance, VectorDestinationManager *dest, jpeg_compress_struct *cinfo);
        std::vector<uint8_t> get_jpeg_header(unsigned width, unsigned height, const movit::RGBTriplet &white_balance, jpeg_compress_struct *cinfo);
+       void add_stream(HTTPD::StreamID stream_id);  // Can only be called from the constructor, or the thread owning <streams>.
+       void update_siphon_streams();  // Same.
+       void create_ffmpeg_context(HTTPD::StreamID stream_id);
 
+       struct WritePacket2Context {
+               MJPEGEncoder *mjpeg_encoder;
+               HTTPD::StreamID stream_id;
+       };
+       std::map<HTTPD::StreamID, WritePacket2Context> ffmpeg_contexts;   // Statically set up, so we never need to worry about dangling pointers.
        static int write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
-       int write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
+       int write_packet2(HTTPD::StreamID stream_id, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
 
        std::thread encoder_thread, va_receiver_thread;
 
@@ -134,9 +142,12 @@ private:
        std::queue<QueuedFrame> frames_encoding;  // Under mu. Used for VA-API only.
        std::condition_variable any_frames_encoding;
 
-       AVFormatContextWithCloser avctx;
+       struct Stream {
+               AVFormatContextWithCloser avctx;
+               std::string mux_header;
+       };
+       std::map<HTTPD::StreamID, Stream> streams;  // Owned by the VA-API receiver thread if VA-API is active, or the encoder thread if not.
        HTTPD *httpd;
-       std::string mux_header;
        std::atomic<bool> should_quit{false};
        bool running = false;