obs-ffmpeg: Implement get_total_bytes in recording outputs

Allows seeing statistics such as bitrate and total bytes saved for
recording outputs.

plugins/obs-ffmpeg/obs-ffmpeg-mux.c

@@ -39,6 +39,7 @@ struct ffmpeg_muxer {
 	obs_output_t      *output;
 	os_process_pipe_t *pipe;
 	int64_t           stop_ts;
+	uint64_t          total_bytes;
 	struct dstr       path;
 	bool              sent_headers;
 	volatile bool     active;
@@ -292,6 +293,7 @@ static bool ffmpeg_mux_start(void *data)
 	/* write headers and start capture */
 	os_atomic_set_bool(&stream->active, true);
 	os_atomic_set_bool(&stream->capturing, true);
+	stream->total_bytes = 0;
 	obs_output_begin_data_capture(stream->output, 0);
 
 	info("Writing file '%s'...", stream->path.array);
@@ -374,6 +376,7 @@ static bool write_packet(struct ffmpeg_muxer *stream,
 		return false;
 	}
 
+	stream->total_bytes += packet->size;
 	return true;
 }
 
@@ -460,6 +463,12 @@ static obs_properties_t *ffmpeg_mux_properties(void *unused)
 	return props;
 }
 
+static uint64_t ffmpeg_mux_total_bytes(void *data)
+{
+	struct ffmpeg_muxer *stream = data;
+	return stream->total_bytes;
+}
+
 struct obs_output_info ffmpeg_muxer = {
 	.id             = "ffmpeg_muxer",
 	.flags          = OBS_OUTPUT_AV |
@@ -471,6 +480,7 @@ struct obs_output_info ffmpeg_muxer = {
 	.start          = ffmpeg_mux_start,
 	.stop           = ffmpeg_mux_stop,
 	.encoded_packet = ffmpeg_mux_data,
+	.get_total_bytes= ffmpeg_mux_total_bytes,
 	.get_properties = ffmpeg_mux_properties
 };
 
@@ -542,6 +552,7 @@ static bool replay_buffer_start(void *data)
 
 	os_atomic_set_bool(&stream->active, true);
 	os_atomic_set_bool(&stream->capturing, true);
+	stream->total_bytes = 0;
 	obs_output_begin_data_capture(stream->output, 0);
 
 	return true;
@@ -811,5 +822,6 @@ struct obs_output_info replay_buffer = {
 	.start          = replay_buffer_start,
 	.stop           = ffmpeg_mux_stop,
 	.encoded_packet = replay_buffer_data,
+	.get_total_bytes= ffmpeg_mux_total_bytes,
 	.get_defaults   = replay_buffer_defaults
 };

plugins/obs-ffmpeg/obs-ffmpeg-output.c

@@ -91,6 +91,8 @@ struct ffmpeg_output {
 	bool               connecting;
 	pthread_t          start_thread;
 
+	uint64_t           total_bytes;
+
 	uint64_t           audio_start_ts;
 	uint64_t           video_start_ts;
 	uint64_t           stop_ts;
@@ -893,6 +895,8 @@ static int process_packet(struct ffmpeg_output *output)
 		}
 	}
 
+	output->total_bytes += packet.size;
+
 	ret = av_interleaved_write_frame(output->ff_data.output, &packet);
 	if (ret < 0) {
 		av_free_packet(&packet);
@@ -1051,6 +1055,7 @@ static bool ffmpeg_output_start(void *data)
 	os_atomic_set_bool(&output->stopping, false);
 	output->audio_start_ts = 0;
 	output->video_start_ts = 0;
+	output->total_bytes = 0;
 
 	ret = pthread_create(&output->start_thread, NULL, start_thread, output);
 	return (output->connecting = (ret == 0));
@@ -1100,6 +1105,12 @@ static void ffmpeg_deactivate(struct ffmpeg_output *output)
 	ffmpeg_data_free(&output->ff_data);
 }
 
+static uint64_t ffmpeg_output_total_bytes(void *data)
+{
+	struct ffmpeg_output *output = data;
+	return output->total_bytes;
+}
+
 struct obs_output_info ffmpeg_output = {
 	.id        = "ffmpeg_output",
 	.flags     = OBS_OUTPUT_AUDIO | OBS_OUTPUT_VIDEO,
@@ -1110,4 +1121,5 @@ struct obs_output_info ffmpeg_output = {
 	.stop      = ffmpeg_output_stop,
 	.raw_video = receive_video,
 	.raw_audio = receive_audio,
+	.get_total_bytes = ffmpeg_output_total_bytes,
 };