Refactor video encoding packet receiving, replay buffer and finish SIGRTMIN for recording while replay/replaying. Add -ro option to specify the directory

include/args_parser.h

@@ -8,7 +8,7 @@
 
 typedef struct gsr_egl gsr_egl;
 
-#define NUM_ARGS 28
+#define NUM_ARGS 29
 #define WINDOW_STR_MAX_SIZE 128
 
 typedef enum {
@@ -71,6 +71,7 @@ typedef struct {
     char window[WINDOW_STR_MAX_SIZE];
     const char *container_format;
     const char *filename;
+    const char *replay_recording_directory;
     const char *portal_session_token_filepath;
     const char *recording_saved_script;
     bool verbose;

include/encoder/video/video.h

@@ -2,26 +2,55 @@
 #define GSR_ENCODER_VIDEO_H
 
 #include "../../color_conversion.h"
+#include "../../replay_buffer.h"
 #include <stdbool.h>
+#include <stdint.h>
+#include <pthread.h>
+
+#define GSR_MAX_RECORDING_DESTINATIONS 128
 
 typedef struct gsr_video_encoder gsr_video_encoder;
 typedef struct AVCodecContext AVCodecContext;
+typedef struct AVFormatContext AVFormatContext;
 typedef struct AVFrame AVFrame;
+typedef struct AVStream AVStream;
+
+typedef struct {
+    size_t id;
+    AVCodecContext *codec_context;
+    AVFormatContext *format_context;
+    AVStream *stream;
+    int64_t start_pts;
+    bool has_received_keyframe;
+} gsr_video_encoder_recording_destination;
 
 struct gsr_video_encoder {
     bool (*start)(gsr_video_encoder *encoder, AVCodecContext *video_codec_context, AVFrame *frame);
+    void (*destroy)(gsr_video_encoder *encoder, AVCodecContext *video_codec_context);
     void (*copy_textures_to_frame)(gsr_video_encoder *encoder, AVFrame *frame, gsr_color_conversion *color_conversion); /* Can be NULL */
     /* |textures| should be able to fit 2 elements */
     void (*get_textures)(gsr_video_encoder *encoder, unsigned int *textures, int *num_textures, gsr_destination_color *destination_color);
-    void (*destroy)(gsr_video_encoder *encoder, AVCodecContext *video_codec_context);
 
     void *priv;
     bool started;
+    gsr_replay_buffer replay_buffer;
+    bool has_replay_buffer;
+    pthread_mutex_t file_write_mutex;
+
+    gsr_video_encoder_recording_destination recording_destinations[GSR_MAX_RECORDING_DESTINATIONS];
+    size_t num_recording_destinations;
+    size_t recording_destination_id;
 };
 
-bool gsr_video_encoder_start(gsr_video_encoder *encoder, AVCodecContext *video_codec_context, AVFrame *frame);
+/* Set |replay_buffer_time_seconds| and |fps| to 0 to disable replay buffer */
+bool gsr_video_encoder_start(gsr_video_encoder *encoder, AVCodecContext *video_codec_context, AVFrame *frame, size_t replay_buffer_num_packets);
+void gsr_video_encoder_destroy(gsr_video_encoder *encoder, AVCodecContext *video_codec_context);
 void gsr_video_encoder_copy_textures_to_frame(gsr_video_encoder *encoder, AVFrame *frame, gsr_color_conversion *color_conversion);
 void gsr_video_encoder_get_textures(gsr_video_encoder *encoder, unsigned int *textures, int *num_textures, gsr_destination_color *destination_color);
-void gsr_video_encoder_destroy(gsr_video_encoder *encoder, AVCodecContext *video_codec_context);
+
+void gsr_video_encoder_receive_packets(gsr_video_encoder *encoder, AVCodecContext *codec_context, int64_t pts, int stream_index);
+/* Returns the id to the recording destination, or -1 on error */
+size_t gsr_video_encoder_add_recording_destination(gsr_video_encoder *encoder, AVCodecContext *codec_context, AVFormatContext *format_context, AVStream *stream, int64_t start_pts);
+bool gsr_video_encoder_remove_recording_destination(gsr_video_encoder *encoder, size_t id);
 
 #endif /* GSR_ENCODER_VIDEO_H */

include/replay_buffer.h

@@ -0,0 +1,41 @@
+#ifndef GSR_REPLAY_BUFFER_H
+#define GSR_REPLAY_BUFFER_H
+
+#include <pthread.h>
+#include <stdbool.h>
+#include <libavcodec/packet.h>
+
+typedef struct {
+    AVPacket packet;
+    int ref_counter;
+    double timestamp;
+} gsr_av_packet;
+
+gsr_av_packet* gsr_av_packet_create(const AVPacket *av_packet, double timestamp);
+gsr_av_packet* gsr_av_packet_ref(gsr_av_packet *self);
+void gsr_av_packet_unref(gsr_av_packet *self);
+
+typedef struct {
+    gsr_av_packet **packets;
+    size_t capacity_num_packets;
+    size_t num_packets;
+    size_t index;
+    pthread_mutex_t mutex;
+    bool mutex_initialized;
+    bool owns_mutex;
+} gsr_replay_buffer;
+
+bool gsr_replay_buffer_init(gsr_replay_buffer *self, size_t replay_buffer_num_packets);
+void gsr_replay_buffer_deinit(gsr_replay_buffer *self);
+
+bool gsr_replay_buffer_append(gsr_replay_buffer *self, const AVPacket *av_packet, double timestamp);
+void gsr_replay_buffer_clear(gsr_replay_buffer *self);
+gsr_av_packet* gsr_replay_buffer_get_packet_at_index(gsr_replay_buffer *self, size_t index);
+/* The clone has to be deinitialized before the replay buffer it clones */
+bool gsr_replay_buffer_clone(const gsr_replay_buffer *self, gsr_replay_buffer *destination);
+/* Returns 0 if replay buffer is empty */
+size_t gsr_replay_buffer_find_packet_index_by_time_passed(gsr_replay_buffer *self, int seconds);
+/* Returns -1 if not found */
+size_t gsr_replay_buffer_find_keyframe(gsr_replay_buffer *self, size_t start_index, int stream_index, bool invert_stream_index);
+
+#endif /* GSR_REPLAY_BUFFER_H */