Support audio-only FFmpeg inputs. Somewhat wonky, though.

[nageru] / defs.h

diff --git a/defs.h b/defs.h
index 2b578983c686032c89236ce0fbdc9b95bc12936e..7b8cc696de1120de66ce04a1b2d29138089d024c 100644 (file)
--- a/defs.h
+++ b/defs.h
@@ -1,21 +1,55 @@
 #ifndef _DEFS_H
 #define _DEFS_H
 
-// OUTPUT_FREQUENCY/FPS must be an integer for now.
-#define OUTPUT_FREQUENCY 48000
-#define FPS 60
-#define WIDTH 1280
-#define HEIGHT 720
+#include <libavformat/version.h>
 
-#define AUDIO_OUTPUT_CODEC AV_CODEC_ID_PCM_S32LE
-#define AUDIO_OUTPUT_SAMPLE_FMT AV_SAMPLE_FMT_S32
-#define AUDIO_OUTPUT_BIT_RATE 0
+// This flag is only supported in FFmpeg 3.3 and up, and we only require 3.1.
+#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 71, 100)
+#define MUX_SKIP_TRAILER "+skip_trailer"
+#else
+#define MUX_SKIP_TRAILER ""
+#endif
 
-#define LOCAL_DUMP_FILE_NAME "test.mov"
-#define STREAM_MUX_NAME "mov"
-#define MUX_OPTS {{ "movflags", "empty_moov+frag_keyframe+default_base_moof" }}
+#define OUTPUT_FREQUENCY 48000  // Currently needs to be exactly 48000, since bmusb outputs in that.
+#define MAX_FPS 60
+#define FAKE_FPS 25  // Must be an integer.
+#define MAX_VIDEO_CARDS 16
+#define MAX_ALSA_CARDS 16
+#define MAX_BUSES 256  // Audio buses.
+
+// For deinterlacing. See also comments on InputState.
+#define FRAME_HISTORY_LENGTH 5
+
+#define AUDIO_OUTPUT_CODEC_NAME "pcm_s32le"
+#define DEFAULT_AUDIO_OUTPUT_BIT_RATE 0
+#define DEFAULT_X264_OUTPUT_BIT_RATE 4500  // 5 Mbit after making room for some audio and TCP overhead.
+
+#define LOCAL_DUMP_PREFIX "record-"
+#define LOCAL_DUMP_SUFFIX ".nut"
+#define DEFAULT_STREAM_MUX_NAME "nut"  // Only for HTTP. Local dump guesses from LOCAL_DUMP_SUFFIX.
+#define DEFAULT_HTTPD_PORT 9095
+#define MUX_OPTS { \
+       /* Make seekable .mov files, and keep MP4 muxer from using unlimited amounts of memory. */ \
+       { "movflags", "empty_moov+frag_keyframe+default_base_moof" MUX_SKIP_TRAILER }, \
+       \
+       /* Make for somewhat less bursty stream output when using .mov. */ \
+       { "frag_duration", "125000" }, \
+       \
+       /* Keep nut muxer from using unlimited amounts of memory. */ \
+       { "write_index", "0" } \
+}
 
 // In bytes. Beware, if too small, stream clients will start dropping data.
+// For mov, you want this at 10MB or so (for the reason mentioned above),
+// but for nut, there's no flushing, so such a large mux buffer would cause
+// the output to be very uneven.
 #define MUX_BUFFER_SIZE 10485760
 
+// In number of frames. Comes in addition to any internal queues in x264
+// (frame threading, lookahead, etc.).
+#define X264_QUEUE_LENGTH 50
+
+#define X264_DEFAULT_PRESET "ultrafast"
+#define X264_DEFAULT_TUNE "film"
+
 #endif  // !defined(_DEFS_H)