[gegl/video-rejuvenation: 15/60] examples/gegl-video: add jit SDL audio output
- From: Øyvind Kolås <ok src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gegl/video-rejuvenation: 15/60] examples/gegl-video: add jit SDL audio output
- Date: Mon, 16 Nov 2015 22:14:43 +0000 (UTC)
commit af9cfcef94046abb795eda7748b70fd15753983d
Author: Øyvind Kolås <pippin gimp org>
Date: Fri Oct 9 20:09:05 2015 +0200
examples/gegl-video: add jit SDL audio output
examples/Makefile.am | 3 +-
examples/gegl-video.c | 79 ++++++++++++++++++++++++++++++++++++++---
operations/external/ff-load.c | 2 +-
3 files changed, 77 insertions(+), 7 deletions(-)
---
diff --git a/examples/Makefile.am b/examples/Makefile.am
index b10add8..edc1186 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -22,13 +22,14 @@ AM_CPPFLAGS = \
-I$(top_builddir)/gegl/property-types \
-I$(top_srcdir)/gegl/property-types
-AM_CFLAGS = $(DEP_CFLAGS) $(BABL_CFLAGS) $(GEXIV2_CFLAGS)
+AM_CFLAGS = $(DEP_CFLAGS) $(BABL_CFLAGS) $(GEXIV2_CFLAGS) $(SDL_CFLAGS)
AM_LDFLAGS = \
$(top_builddir)/gegl/libgegl-$(GEGL_API_VERSION).la \
$(GEXIV2_LIBS) \
$(BABL_LIBS) \
$(DEP_LIBS) \
+ $(SDL_LIBS) \
$(MATH_LIB)
bin_PROGRAMS = \
diff --git a/examples/gegl-video.c b/examples/gegl-video.c
index 6c32bf5..44d861f 100644
--- a/examples/gegl-video.c
+++ b/examples/gegl-video.c
@@ -27,6 +27,7 @@
#include <stdlib.h>
#include <string.h>
#include <math.h>
+#include <SDL.h>
typedef enum NeglRunMode {
NEGL_NO_UI = 0,
@@ -137,7 +138,6 @@ static void parse_args (int argc, char **argv)
stage = 1;
}
}
-
}
GeglNode *gegl_decode = NULL;
@@ -162,13 +162,53 @@ static void decode_frame_no (int frame)
GeglNode *translate = NULL;
+static int audio_len = 0;
+static int audio_pos = 0;
+
+int16_t audio_data[8192000];
+
+
+static void fill_audio(void *udata, Uint8 *stream, int len)
+{
+ int audio_remaining = audio_len - audio_pos;
+ if (audio_remaining < 0)
+ return;
+
+ if (audio_remaining < len) len = audio_remaining;
+
+ //SDL_MixAudio(stream, (uint8_t*)&audio_data[audio_pos/2], len, SDL_MIX_MAXVOLUME);
+ memcpy (stream, (uint8_t*)&audio_data[audio_pos/2], len);
+ audio_pos += len;
+}
+
+static int audio_started = 0;
+
gint
main (gint argc,
gchar **argv)
{
+ SDL_AudioSpec AudioSettings = {0};
+
GeglNode *display = NULL;
GeglNode *readbuf = NULL;
+ SDL_Init(SDL_INIT_AUDIO);
+ AudioSettings.freq = 48000;
+ AudioSettings.format = AUDIO_S16SYS;
+ AudioSettings.channels = 2;
+ AudioSettings.samples = 1024;
+ AudioSettings.callback = fill_audio;
+ SDL_OpenAudio(&AudioSettings, 0);
+
+ if (AudioSettings.format != AUDIO_S16SYS)
+ {
+ fprintf (stderr, "not getting format we wanted\n");
+ }
+ if (AudioSettings.freq != 48000)
+ {
+ fprintf (stderr, "not getting rate we wanted\n");
+ }
+
if (argc < 2)
usage();
@@ -234,14 +274,42 @@ main (gint argc,
}
decode_frame_no (frame);
+ {
+ GeglAudio *audio;
+ gdouble fps;
+ gegl_node_get (load, "audio", &audio,
+ "frame-rate", &fps, NULL);
+
+
+
+ if (audio->samples > 0)
+ {
+ int i;
+ if (!audio_started)
+ {
+ SDL_PauseAudio(0);
+ audio_started = 1;
+ }
+ for (i = 0; i < audio->samples; i++)
+ {
+ audio_data[audio_len/2 + 0] = audio->left[i] * 32767.0;
+ audio_data[audio_len/2 + 1] = audio->right[i] * 32767.0;
+ audio_len += 4;
+ }
+ }
switch(run_mode)
{
case NEGL_NO_UI:
break;
case NEGL_VIDEO:
+
gegl_node_set (readbuf, "buffer", video_frame, NULL);
gegl_node_process (display);
+ while ( (audio_pos / 4.0) / audio->samplerate < (frame / fps) - 0.05 )
+ {
+ g_usleep (500); /* sync audio */
+ }
break;
}
@@ -250,19 +318,18 @@ main (gint argc,
char *path = g_strdup_printf ("%s%07i%s", frame_path, output_frame_no++, frame_extension);
GeglNode *save_graph = gegl_node_new ();
GeglNode *readbuf, *save;
- GeglAudio *audio;
- gegl_node_get (load, "audio", &audio, NULL);
readbuf = gegl_node_new_child (save_graph, "operation", "gegl:buffer-source", "buffer",
video_frame, NULL);
- save = gegl_node_new_child (save_graph, "operation", "gegl:png-save", "bitdepth", 8, "compression",
2,
+ save = gegl_node_new_child (save_graph, "operation", "gegl:save",
"path", path, NULL);
gegl_node_link_many (readbuf, save, NULL);
gegl_node_process (save);
g_object_unref (save_graph);
gegl_meta_set_audio (path, audio);
g_free (path);
- g_object_unref (audio);
}
+ g_object_unref (audio);
+ }
}
if (show_progress)
@@ -312,6 +379,8 @@ gegl_meta_set_audio (const char *path,
g_string_free (str, TRUE);
}
gexiv2_metadata_free (e2m);
+
+ SDL_CloseAudio();
}
void
diff --git a/operations/external/ff-load.c b/operations/external/ff-load.c
index dad5844..61a6888 100644
--- a/operations/external/ff-load.c
+++ b/operations/external/ff-load.c
@@ -82,7 +82,7 @@ typedef struct
glong prevframe; /* previously decoded frame in loadedfile */
} Priv;
-typedef struct AudioFrame { /* XXX: hardcoded for 16bit chunky stereo, */
+typedef struct AudioFrame { /* XXX: hardcoded for 16bit chunky stereo, */
uint8_t buf[16000];
int len;
long pos;
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