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From 02357506cf4baad4b10a197249ff30349bae8f96 Mon Sep 17 00:00:00 2001
From: Sanchayan Maity <sanchayan@asymptotic.io>
Date: Wed, 27 Jan 2021 23:36:19 +0530
Subject: [PATCH 6/7] fdkaacenc: Add support for setting bitrate mode
---
.../gst-plugins-bad/ext/fdkaac/gstfdkaacenc.c | 44 ++++++++++++++++++-
.../gst-plugins-bad/ext/fdkaac/gstfdkaacenc.h | 11 +++++
2 files changed, 54 insertions(+), 1 deletion(-)
Index: gst-plugins-bad1.0-contrib/ext/fdkaac/gstfdkaacenc.c
===================================================================
--- gst-plugins-bad1.0-contrib.orig/ext/fdkaac/gstfdkaacenc.c
+++ gst-plugins-bad1.0-contrib/ext/fdkaac/gstfdkaacenc.c
@@ -31,6 +31,7 @@
/* TODO:
* - Add support for other AOT / profiles
+ * - Expose more properties, e.g. vbr
* - Signal encoder delay
*/
@@ -39,6 +40,7 @@ enum
PROP_0,
PROP_AFTERBURNER,
PROP_BITRATE,
+ PROP_BITRATEMODE,
PROP_HEADER_PERIOD,
PROP_PEAK_BITRATE,
PROP_RATE_CONTROL,
@@ -146,6 +148,28 @@ gst_fdk_aac_rate_control_get_type (void)
return fdk_aac_rate_control_type;
}
+#define GST_AAC_BITRATEMODE (gst_aac_bitratemode_get_type ())
+static GType
+gst_aac_bitratemode_get_type (void)
+{
+ static GType aac_bitrate_mode_type = 0;
+ static const GEnumValue bitrate_mode_types[] = {
+ {GST_AAC_BITRATEMODE_CONSTANT, "Constant bitrate", "constant"},
+ {GST_AAC_BITRATEMODE_VERY_LOW, "Variable bitrate", "very low"},
+ {GST_AAC_BITRATEMODE_LOW, "Variable bitrate", "low"},
+ {GST_AAC_BITRATEMODE_MEDIUM, "Variable bitrate", "medium"},
+ {GST_AAC_BITRATEMODE_HIGH, "Variable bitrate", "high"},
+ {GST_AAC_BITRATEMODE_VERY_HIGH, "Variable bitrate", "very high"},
+ {0, NULL, NULL}
+ };
+
+ if (!aac_bitrate_mode_type)
+ aac_bitrate_mode_type =
+ g_enum_register_static ("GstAacBitrateMode", bitrate_mode_types);
+
+ return aac_bitrate_mode_type;
+}
+
static void
gst_fdkaacenc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
@@ -168,6 +192,9 @@ gst_fdkaacenc_set_property (GObject * ob
case PROP_VBR_PRESET:
self->vbr_preset = g_value_get_enum (value);
break;
+ case PROP_BITRATEMODE:
+ self->bitrate_mode = g_value_get_enum (value);
+ break;
case PROP_HEADER_PERIOD:
self->header_period = g_value_get_uint (value);
break;
@@ -200,6 +227,9 @@ gst_fdkaacenc_get_property (GObject * ob
case PROP_VBR_PRESET:
g_value_set_enum (value, self->vbr_preset);
break;
+ case PROP_BITRATEMODE:
+ g_value_set_enum (value, self->bitrate_mode);
+ break;
case PROP_HEADER_PERIOD:
g_value_set_uint (value, self->header_period);
break;
@@ -562,6 +592,13 @@ gst_fdkaacenc_set_format (GstAudioEncode
GST_INFO_OBJECT (self, "Afterburner enabled");
}
+ if ((err = aacEncoder_SetParam (self->enc, AACENC_BITRATEMODE,
+ self->bitrate_mode)) != AACENC_OK) {
+ GST_ERROR_OBJECT (self, "Unable to set bitrate mode %d: %d",
+ self->bitrate_mode, err);
+ return FALSE;
+ }
+
if ((err = aacEncoder_SetParam (self->enc, AACENC_HEADER_PERIOD,
self->header_period)) != AACENC_OK) {
GST_ERROR_OBJECT (self, "Unable to set header period %d: %d",
@@ -806,6 +843,7 @@ static void
gst_fdkaacenc_init (GstFdkAacEnc * self)
{
self->bitrate = DEFAULT_BITRATE;
+ self->bitrate_mode = GST_AAC_BITRATEMODE_CONSTANT;
self->enc = NULL;
self->is_drained = TRUE;
self->afterburner = FALSE;
@@ -894,6 +932,12 @@ gst_fdkaacenc_class_init (GstFdkAacEncCl
GST_FDK_AAC_VBR_PRESET, DEFAULT_VBR_PRESET,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (object_class, PROP_BITRATEMODE,
+ g_param_spec_enum ("bitrate-mode", "Bitrate Mode",
+ "AAC Bitrate configurations",
+ GST_AAC_BITRATEMODE, GST_AAC_BITRATEMODE_CONSTANT,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
g_object_class_install_property (object_class, PROP_HEADER_PERIOD,
g_param_spec_uint ("header-period", "Frame count period",
"Frame count period for sending in-band configuration buffers",
Index: gst-plugins-bad1.0-contrib/ext/fdkaac/gstfdkaacenc.h
===================================================================
--- gst-plugins-bad1.0-contrib.orig/ext/fdkaac/gstfdkaacenc.h
+++ gst-plugins-bad1.0-contrib/ext/fdkaac/gstfdkaacenc.h
@@ -73,6 +73,16 @@ typedef enum
GST_FDK_AAC_RATE_CONTROL_VARIABLE_BITRATE,
} GstFdkAacRateControl;
+typedef enum
+{
+ GST_AAC_BITRATEMODE_CONSTANT = 0,
+ GST_AAC_BITRATEMODE_VERY_LOW,
+ GST_AAC_BITRATEMODE_LOW,
+ GST_AAC_BITRATEMODE_MEDIUM,
+ GST_AAC_BITRATEMODE_HIGH,
+ GST_AAC_BITRATEMODE_VERY_HIGH
+} GstAacBitrateMode;
+
struct _GstFdkAacEnc {
GstAudioEncoder element;
@@ -84,6 +94,7 @@ struct _GstFdkAacEnc {
const GstAudioChannelPosition *aac_positions;
gboolean is_drained;
+ GstAacBitrateMode bitrate_mode;
guint header_period;
guint peak_bitrate;
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