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theoraenc: Make the bitrate/quality dynamically modifiable

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=630303
This commit is contained in:
Olivier Crête 2010-09-21 18:57:42 -04:00
parent 6ecbdab1fe
commit 91f89f490c
2 changed files with 48 additions and 8 deletions
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54
ext/theora/gsttheoraenc.c
View file

@ -52,7 +52,7 @@
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#include "config.h"
#endif
#include "gsttheoraenc.h"
@ -259,11 +259,13 @@ gst_theora_enc_class_init (GstTheoraEncClass * klass)
g_object_class_install_property (gobject_class, PROP_BITRATE,
g_param_spec_int ("bitrate", "Bitrate", "Compressed video bitrate (kbps)",
0, (1 << 24) - 1, THEORA_DEF_BITRATE,
(GParamFlags) G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
(GParamFlags) G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
GST_PARAM_MUTABLE_PLAYING));
g_object_class_install_property (gobject_class, PROP_QUALITY,
g_param_spec_int ("quality", "Quality", "Video quality", 0, 63,
THEORA_DEF_QUALITY,
(GParamFlags) G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
(GParamFlags) G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
GST_PARAM_MUTABLE_PLAYING));
g_object_class_install_property (gobject_class, PROP_QUICK,
g_param_spec_boolean ("quick", "Quick",
"ignored and kept for API compat only", TRUE,
@ -462,6 +464,13 @@ theora_enc_reset (GstTheoraEnc * enc)
ogg_uint32_t keyframe_force;
int rate_flags;
GST_OBJECT_LOCK (enc);
enc->info.target_bitrate = enc->video_bitrate;
enc->info.quality = enc->video_quality;
enc->bitrate_changed = FALSE;
enc->quality_changed = FALSE;
GST_OBJECT_UNLOCK (enc);
if (enc->encoder)
th_encode_free (enc->encoder);
enc->encoder = th_encode_alloc (&enc->info);
@ -633,8 +642,6 @@ theora_enc_sink_setcaps (GstPad * pad, GstCaps * caps)
}
enc->info.colorspace = TH_CS_UNSPECIFIED;
enc->info.target_bitrate = enc->video_bitrate;
enc->info.quality = enc->video_quality;
/* as done in theora */
enc->info.keyframe_granule_shift = _ilog (enc->keyframe_force - 1);
@ -1071,8 +1078,24 @@ theora_enc_chain (GstPad * pad, GstBuffer * buffer)
return GST_FLOW_OK;
}
/* see if we need to schedule a keyframe */
GST_OBJECT_LOCK (enc);
if (enc->bitrate_changed) {
long int bitrate = enc->video_bitrate;
th_encode_ctl (enc->encoder, TH_ENCCTL_SET_BITRATE, &bitrate,
sizeof (long int));
enc->bitrate_changed = FALSE;
}
if (enc->quality_changed) {
long int quality = enc->video_quality;
th_encode_ctl (enc->encoder, TH_ENCCTL_SET_QUALITY, &quality,
sizeof (long int));
enc->quality_changed = FALSE;
}
/* see if we need to schedule a keyframe */
force_keyframe = enc->force_keyframe;
enc->force_keyframe = FALSE;
GST_OBJECT_UNLOCK (enc);
@ -1353,12 +1376,23 @@ theora_enc_set_property (GObject * object, guint prop_id,
/* kept for API compat, but ignored */
break;
case PROP_BITRATE:
GST_OBJECT_LOCK (enc);
enc->video_bitrate = g_value_get_int (value) * 1000;
enc->video_quality = 0;
enc->bitrate_changed = TRUE;
GST_OBJECT_UNLOCK (enc);
break;
case PROP_QUALITY:
enc->video_quality = g_value_get_int (value);
enc->video_bitrate = 0;
GST_OBJECT_LOCK (enc);
if (GST_STATE (enc) >= GST_STATE_PAUSED && enc->video_quality == 0) {
GST_WARNING_OBJECT (object, "Can't change from bitrate to quality mode"
" while playing");
} else {
enc->video_quality = g_value_get_int (value);
enc->video_bitrate = 0;
enc->quality_changed = TRUE;
}
GST_OBJECT_UNLOCK (enc);
break;
case PROP_KEYFRAME_AUTO:
enc->keyframe_auto = g_value_get_boolean (value);
@ -1413,10 +1447,14 @@ theora_enc_get_property (GObject * object, guint prop_id,
g_value_set_enum (value, BORDER_BLACK);
break;
case PROP_BITRATE:
GST_OBJECT_LOCK (enc);
g_value_set_int (value, enc->video_bitrate / 1000);
GST_OBJECT_UNLOCK (enc);
break;
case PROP_QUALITY:
GST_OBJECT_LOCK (enc);
g_value_set_int (value, enc->video_quality);
GST_OBJECT_UNLOCK (enc);
break;
case PROP_QUICK:
g_value_set_boolean (value, TRUE);

2
ext/theora/gsttheoraenc.h
View file

@ -92,7 +92,9 @@ struct _GstTheoraEnc
gboolean initialised;
gint video_bitrate; /* bitrate target for Theora video */
gboolean bitrate_changed;
gint video_quality; /* Theora quality selector 0 = low, 63 = high */
gboolean quality_changed;
gboolean keyframe_auto;
gint keyframe_freq;
gint keyframe_force;