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666 lines
19 KiB
C
666 lines
19 KiB
C
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/* GStreamer AAC encoder plugin
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* Copyright (C) 2011 Kan Hu <kan.hu@linaro.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-voaacenc
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*
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* AAC audio encoder based on vo-aacenc library
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* <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aacenc library source file</ulink>.
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch filesrc location=abc.wav ! wavparse ! audioresample ! audioconvert ! voaacenc ! filesink location=abc.aac
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* ]|
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <gst/audio/multichannel.h>
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#include "gstvoaacenc.h"
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#define VOAAC_ENC_DEFAULT_BITRATE (128000)
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#define VOAAC_ENC_DEFAULT_CHANNELS (2)
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#define VOAAC_ENC_DEFAULT_RATE (44100)
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#define VOAAC_ENC_DEFAULT_OUTPUTFORMAT (0) /* RAW */
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#define VOAAC_ENC_MPEGVERSION (4)
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#define VOAAC_ENC_CODECDATA_LEN (2)
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#define VOAAC_ENC_BITS_PER_SAMPLE (16)
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enum
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{
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PROP_0,
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PROP_BITRATE
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};
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static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-raw-int, "
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"width = (int) 16, "
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"depth = (int) 16, "
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"signed = (boolean) TRUE, "
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"endianness = (int) BYTE_ORDER, "
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"rate = (int) [8000, 96000], " "channels = (int) [1, 6]")
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);
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/mpeg, "
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"mpegversion = (int) 4, "
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"rate = (int) [8000, 96000], "
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"channels = (int) [1, 6], " "stream-format = (string) { adts, raw } ")
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);
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GST_DEBUG_CATEGORY_STATIC (gst_voaacenc_debug);
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#define GST_CAT_DEFAULT gst_voaacenc_debug
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static void gst_voaacenc_finalize (GObject * object);
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static GstFlowReturn gst_voaacenc_chain (GstPad * pad, GstBuffer * buffer);
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static gboolean gst_voaacenc_setcaps (GstPad * pad, GstCaps * caps);
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static GstStateChangeReturn gst_voaacenc_state_change (GstElement * element,
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GstStateChange transition);
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static gboolean voaacenc_core_init (GstVoAacEnc * voaacenc);
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static gboolean voaacenc_core_set_parameter (GstVoAacEnc * voaacenc);
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static void voaacenc_core_uninit (GstVoAacEnc * voaacenc);
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static GstCaps *gst_voaacenc_getcaps (GstPad * pad);
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static GstCaps *gst_voaacenc_create_source_pad_caps (GstVoAacEnc * voaacenc);
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static gint voaacenc_get_rate_index (gint rate);
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#define VOAAC_ENC_MAX_CHANNELS 6
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/* describe the channels position */
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const GstAudioChannelPosition
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gst_voaacenc_channel_position[][VOAAC_ENC_MAX_CHANNELS] = {
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{ /* 1 ch: Mono */
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GST_AUDIO_CHANNEL_POSITION_FRONT_MONO},
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{ /* 2 ch: front left + front right (front stereo) */
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GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
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GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT},
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{ /* 3 ch: front center + front stereo */
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GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
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GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
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GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT},
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{ /* 4 ch: front center + front stereo + back center */
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GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
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GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
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GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
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GST_AUDIO_CHANNEL_POSITION_REAR_CENTER},
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{ /* 5 ch: front center + front stereo + back stereo */
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GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
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GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
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GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
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GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
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GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT},
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{ /* 6ch: front center + front stereo + back stereo + LFE */
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GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
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GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
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GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
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GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
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GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
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GST_AUDIO_CHANNEL_POSITION_LFE}
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};
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static void
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_do_init (GType object_type)
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{
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const GInterfaceInfo preset_interface_info = {
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NULL, /* interface init */
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NULL, /* interface finalize */
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NULL /* interface_data */
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};
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g_type_add_interface_static (object_type, GST_TYPE_PRESET,
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&preset_interface_info);
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GST_DEBUG_CATEGORY_INIT (gst_voaacenc_debug, "voaacenc", 0,
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"AAC audio encoder");
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}
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GST_BOILERPLATE_FULL (GstVoAacEnc, gst_voaacenc, GstElement, GST_TYPE_ELEMENT,
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_do_init);
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static void
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gst_voaacenc_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstVoAacEnc *self = GST_VOAACENC (object);
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switch (prop_id) {
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case PROP_BITRATE:
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self->bitrate = g_value_get_int (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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return;
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}
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static void
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gst_voaacenc_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstVoAacEnc *self = GST_VOAACENC (object);
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switch (prop_id) {
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case PROP_BITRATE:
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g_value_set_int (value, self->bitrate);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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return;
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}
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static void
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gst_voaacenc_base_init (gpointer klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_template));
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gst_element_class_set_details_simple (element_class, "AAC audio encoder",
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"Codec/Encoder/Audio", "AAC audio encoder", "Kan Hu <kan.hu@linaro.org>");
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}
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static void
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gst_voaacenc_class_init (GstVoAacEncClass * klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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object_class->set_property = GST_DEBUG_FUNCPTR (gst_voaacenc_set_property);
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object_class->get_property = GST_DEBUG_FUNCPTR (gst_voaacenc_get_property);
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object_class->finalize = GST_DEBUG_FUNCPTR (gst_voaacenc_finalize);
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g_object_class_install_property (object_class, PROP_BITRATE,
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g_param_spec_int ("bitrate",
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"Bitrate",
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"Target Audio Bitrate",
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0, G_MAXINT, VOAAC_ENC_DEFAULT_BITRATE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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element_class->change_state = GST_DEBUG_FUNCPTR (gst_voaacenc_state_change);
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}
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static void
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gst_voaacenc_init (GstVoAacEnc * voaacenc, GstVoAacEncClass * klass)
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{
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/* create the sink pad */
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voaacenc->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
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gst_pad_set_setcaps_function (voaacenc->sinkpad,
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GST_DEBUG_FUNCPTR (gst_voaacenc_setcaps));
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gst_pad_set_getcaps_function (voaacenc->sinkpad,
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GST_DEBUG_FUNCPTR (gst_voaacenc_getcaps));
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gst_pad_set_chain_function (voaacenc->sinkpad,
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GST_DEBUG_FUNCPTR (gst_voaacenc_chain));
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gst_element_add_pad (GST_ELEMENT (voaacenc), voaacenc->sinkpad);
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/* create the src pad */
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voaacenc->srcpad = gst_pad_new_from_static_template (&src_template, "src");
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gst_pad_use_fixed_caps (voaacenc->srcpad);
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gst_element_add_pad (GST_ELEMENT (voaacenc), voaacenc->srcpad);
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voaacenc->adapter = gst_adapter_new ();
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voaacenc->bitrate = VOAAC_ENC_DEFAULT_BITRATE;
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voaacenc->rate = VOAAC_ENC_DEFAULT_RATE;
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voaacenc->channels = VOAAC_ENC_DEFAULT_CHANNELS;
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voaacenc->output_format = VOAAC_ENC_DEFAULT_OUTPUTFORMAT;
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/* init rest */
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voaacenc->handle = NULL;
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voaacenc->sinkcaps = NULL;
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}
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static void
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gst_voaacenc_finalize (GObject * object)
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{
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GstVoAacEnc *voaacenc;
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voaacenc = GST_VOAACENC (object);
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if (voaacenc->sinkcaps) {
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gst_caps_unref (voaacenc->sinkcaps);
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voaacenc->sinkcaps = NULL;
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}
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g_object_unref (G_OBJECT (voaacenc->adapter));
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voaacenc->adapter = NULL;
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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/* check downstream caps to configure format */
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static void
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gst_voaacenc_negotiate (GstVoAacEnc * voaacenc)
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{
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GstCaps *caps;
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caps = gst_pad_get_allowed_caps (voaacenc->srcpad);
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GST_DEBUG_OBJECT (voaacenc, "allowed caps: %" GST_PTR_FORMAT, caps);
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if (caps && gst_caps_get_size (caps) > 0) {
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GstStructure *s = gst_caps_get_structure (caps, 0);
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const gchar *str = NULL;
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if ((str = gst_structure_get_string (s, "stream-format"))) {
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if (strcmp (str, "adts") == 0) {
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GST_DEBUG_OBJECT (voaacenc, "use ADTS format for output");
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voaacenc->output_format = 1;
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} else if (strcmp (str, "raw") == 0) {
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GST_DEBUG_OBJECT (voaacenc, "use RAW format for output");
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voaacenc->output_format = 0;
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} else {
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GST_DEBUG_OBJECT (voaacenc, "unknown stream-format: %s", str);
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voaacenc->output_format = 0;
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}
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}
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}
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if (caps)
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gst_caps_unref (caps);
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}
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static GstCaps *
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gst_voaacenc_generate_sink_caps (void)
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{
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GstCaps *caps = gst_caps_new_empty ();
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gint i, c;
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for (i = 0; i < VOAAC_ENC_MAX_CHANNELS; i++) {
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GValue chanpos = { 0 };
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GValue pos = { 0 };
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GstStructure *structure;
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g_value_init (&chanpos, GST_TYPE_ARRAY);
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g_value_init (&pos, GST_TYPE_AUDIO_CHANNEL_POSITION);
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for (c = 0; c <= i; c++) {
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g_value_set_enum (&pos, gst_voaacenc_channel_position[i][c]);
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gst_value_array_append_value (&chanpos, &pos);
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}
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g_value_unset (&pos);
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structure = gst_structure_new ("audio/x-raw-int",
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"width", G_TYPE_INT, 16,
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"depth", G_TYPE_INT, 16,
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"signed", G_TYPE_BOOLEAN, TRUE,
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"endianness", G_TYPE_INT, G_BYTE_ORDER,
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"rate", GST_TYPE_INT_RANGE, 8000, 96000, "channels", G_TYPE_INT, i + 1);
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gst_structure_set_value (structure, "channel-positions", &chanpos);
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g_value_unset (&chanpos);
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gst_caps_append_structure (caps, structure);
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}
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return caps;
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}
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static GstCaps *
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gst_voaacenc_getcaps (GstPad * pad)
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{
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GstVoAacEnc *voaacenc = GST_VOAACENC (GST_PAD_PARENT (pad));
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if (voaacenc->sinkcaps == NULL) {
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voaacenc->sinkcaps = gst_voaacenc_generate_sink_caps ();
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}
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GST_DEBUG_OBJECT (voaacenc, "generated sink caps: %" GST_PTR_FORMAT,
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voaacenc->sinkcaps);
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return gst_caps_ref (voaacenc->sinkcaps);
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}
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static gboolean
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gst_voaacenc_setcaps (GstPad * pad, GstCaps * caps)
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{
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gboolean ret = FALSE;
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GstStructure *structure;
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GstVoAacEnc *voaacenc;
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GstCaps *src_caps;
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voaacenc = GST_VOAACENC (GST_PAD_PARENT (pad));
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structure = gst_caps_get_structure (caps, 0);
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/* get channel count */
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gst_structure_get_int (structure, "channels", &voaacenc->channels);
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gst_structure_get_int (structure, "rate", &voaacenc->rate);
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/* precalc duration as it's constant now */
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voaacenc->duration =
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gst_util_uint64_scale_int (1024, GST_SECOND, voaacenc->rate);
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voaacenc->inbuf_size = voaacenc->channels * 2 * 1024;
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gst_voaacenc_negotiate (voaacenc);
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/* create reverse caps */
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src_caps = gst_voaacenc_create_source_pad_caps (voaacenc);
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if (src_caps) {
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gst_pad_set_caps (voaacenc->srcpad, src_caps);
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gst_caps_unref (src_caps);
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ret = voaacenc_core_set_parameter (voaacenc);
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}
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return ret;
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}
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static GstFlowReturn
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gst_voaacenc_chain (GstPad * pad, GstBuffer * buffer)
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{
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GstVoAacEnc *voaacenc;
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GstFlowReturn ret;
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guint64 timestamp, distance = 0;
|
||
|
|
||
|
voaacenc = GST_VOAACENC (GST_PAD_PARENT (pad));
|
||
|
|
||
|
g_return_val_if_fail (voaacenc->handle, GST_FLOW_WRONG_STATE);
|
||
|
|
||
|
if (voaacenc->rate == 0 || voaacenc->channels == 0)
|
||
|
goto not_negotiated;
|
||
|
|
||
|
/* discontinuity clears adapter, FIXME, maybe we can set some
|
||
|
* encoder flag to mask the discont. */
|
||
|
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT)) {
|
||
|
gst_adapter_clear (voaacenc->adapter);
|
||
|
voaacenc->ts = 0;
|
||
|
voaacenc->discont = TRUE;
|
||
|
}
|
||
|
|
||
|
ret = GST_FLOW_OK;
|
||
|
gst_adapter_push (voaacenc->adapter, buffer);
|
||
|
|
||
|
/* Collect samples until we have enough for an output frame */
|
||
|
while (gst_adapter_available (voaacenc->adapter) >= voaacenc->inbuf_size) {
|
||
|
GstBuffer *out;
|
||
|
guint8 *data;
|
||
|
VO_CODECBUFFER input = { 0 }
|
||
|
, output = {
|
||
|
0};
|
||
|
VO_AUDIO_OUTPUTINFO output_info = { {0}
|
||
|
};
|
||
|
|
||
|
|
||
|
/* max size */
|
||
|
if ((ret =
|
||
|
gst_pad_alloc_buffer_and_set_caps (voaacenc->srcpad, 0,
|
||
|
voaacenc->inbuf_size, GST_PAD_CAPS (voaacenc->srcpad),
|
||
|
&out)) != GST_FLOW_OK) {
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
output.Buffer = GST_BUFFER_DATA (out);
|
||
|
output.Length = voaacenc->inbuf_size;
|
||
|
|
||
|
if (voaacenc->discont) {
|
||
|
GST_BUFFER_FLAG_SET (out, GST_BUFFER_FLAG_DISCONT);
|
||
|
voaacenc->discont = FALSE;
|
||
|
}
|
||
|
|
||
|
data =
|
||
|
(guint8 *) gst_adapter_peek (voaacenc->adapter, voaacenc->inbuf_size);
|
||
|
input.Buffer = data;
|
||
|
input.Length = voaacenc->inbuf_size;
|
||
|
voaacenc->codec_api.SetInputData (voaacenc->handle, &input);
|
||
|
|
||
|
/* encode */
|
||
|
if (voaacenc->codec_api.GetOutputData (voaacenc->handle, &output,
|
||
|
&output_info) != VO_ERR_NONE) {
|
||
|
gst_buffer_unref (out);
|
||
|
return GST_FLOW_ERROR;
|
||
|
}
|
||
|
|
||
|
/* get timestamp from adapter */
|
||
|
timestamp = gst_adapter_prev_timestamp (voaacenc->adapter, &distance);
|
||
|
|
||
|
if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (timestamp))) {
|
||
|
GST_BUFFER_TIMESTAMP (out) =
|
||
|
timestamp +
|
||
|
GST_FRAMES_TO_CLOCK_TIME (distance / voaacenc->channels /
|
||
|
VOAAC_ENC_BITS_PER_SAMPLE, voaacenc->rate);
|
||
|
}
|
||
|
|
||
|
GST_BUFFER_DURATION (out) =
|
||
|
GST_FRAMES_TO_CLOCK_TIME (voaacenc->inbuf_size / voaacenc->channels /
|
||
|
VOAAC_ENC_BITS_PER_SAMPLE, voaacenc->rate);
|
||
|
|
||
|
voaacenc->ts = GST_BUFFER_TIMESTAMP (out) + GST_BUFFER_DURATION (out);
|
||
|
|
||
|
GST_LOG_OBJECT (voaacenc, "Pushing out buffer time: %" GST_TIME_FORMAT
|
||
|
" duration: %" GST_TIME_FORMAT,
|
||
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (out)),
|
||
|
GST_TIME_ARGS (GST_BUFFER_DURATION (out)));
|
||
|
|
||
|
GST_BUFFER_SIZE (out) = output.Length;
|
||
|
|
||
|
/* flush the among of data we have peek */
|
||
|
gst_adapter_flush (voaacenc->adapter, voaacenc->inbuf_size);
|
||
|
|
||
|
/* play */
|
||
|
if ((ret = gst_pad_push (voaacenc->srcpad, out)) != GST_FLOW_OK)
|
||
|
break;
|
||
|
}
|
||
|
return ret;
|
||
|
|
||
|
/* ERRORS */
|
||
|
not_negotiated:
|
||
|
{
|
||
|
GST_ELEMENT_ERROR (voaacenc, STREAM, TYPE_NOT_FOUND,
|
||
|
(NULL), ("unknown type"));
|
||
|
return GST_FLOW_NOT_NEGOTIATED;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static GstStateChangeReturn
|
||
|
gst_voaacenc_state_change (GstElement * element, GstStateChange transition)
|
||
|
{
|
||
|
GstVoAacEnc *voaacenc;
|
||
|
GstStateChangeReturn ret;
|
||
|
|
||
|
voaacenc = GST_VOAACENC (element);
|
||
|
|
||
|
switch (transition) {
|
||
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
||
|
if (voaacenc_core_init (voaacenc) == FALSE)
|
||
|
return GST_STATE_CHANGE_FAILURE;
|
||
|
break;
|
||
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
||
|
voaacenc->rate = 0;
|
||
|
voaacenc->channels = 0;
|
||
|
voaacenc->ts = 0;
|
||
|
voaacenc->discont = FALSE;
|
||
|
gst_adapter_clear (voaacenc->adapter);
|
||
|
break;
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
||
|
|
||
|
switch (transition) {
|
||
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
||
|
voaacenc_core_uninit (voaacenc);
|
||
|
gst_adapter_clear (voaacenc->adapter);
|
||
|
break;
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static GstCaps *
|
||
|
gst_voaacenc_create_source_pad_caps (GstVoAacEnc * voaacenc)
|
||
|
{
|
||
|
GstCaps *caps = NULL;
|
||
|
GstBuffer *codec_data;
|
||
|
gint index;
|
||
|
|
||
|
if ((index = voaacenc_get_rate_index (voaacenc->rate)) >= 0) {
|
||
|
|
||
|
caps = gst_caps_new_simple ("audio/mpeg",
|
||
|
"mpegversion", G_TYPE_INT, VOAAC_ENC_MPEGVERSION,
|
||
|
"channels", G_TYPE_INT, voaacenc->channels,
|
||
|
"rate", G_TYPE_INT, voaacenc->rate,
|
||
|
"stream-format", G_TYPE_STRING,
|
||
|
(voaacenc->output_format ? "adts" : "raw")
|
||
|
, NULL);
|
||
|
|
||
|
if (!voaacenc->output_format) {
|
||
|
codec_data = gst_buffer_new_and_alloc (VOAAC_ENC_CODECDATA_LEN);
|
||
|
|
||
|
GST_BUFFER_DATA (codec_data)[0] = ((0x02 << 3) | (index >> 1));
|
||
|
GST_BUFFER_DATA (codec_data)[1] =
|
||
|
((index & 0x01) << 7) | (voaacenc->channels << 3);
|
||
|
|
||
|
gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, codec_data,
|
||
|
NULL);
|
||
|
|
||
|
gst_buffer_unref (codec_data);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return caps;
|
||
|
}
|
||
|
|
||
|
|
||
|
|
||
|
static VO_U32
|
||
|
voaacenc_core_mem_alloc (VO_S32 uID, VO_MEM_INFO * pMemInfo)
|
||
|
{
|
||
|
if (!pMemInfo)
|
||
|
return VO_ERR_INVALID_ARG;
|
||
|
|
||
|
pMemInfo->VBuffer = g_malloc (pMemInfo->Size);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static VO_U32
|
||
|
voaacenc_core_mem_free (VO_S32 uID, VO_PTR pMem)
|
||
|
{
|
||
|
g_free (pMem);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static VO_U32
|
||
|
voaacenc_core_mem_set (VO_S32 uID, VO_PTR pBuff, VO_U8 uValue, VO_U32 uSize)
|
||
|
{
|
||
|
memset (pBuff, uValue, uSize);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static VO_U32
|
||
|
voaacenc_core_mem_copy (VO_S32 uID, VO_PTR pDest, VO_PTR pSource, VO_U32 uSize)
|
||
|
{
|
||
|
memcpy (pDest, pSource, uSize);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static VO_U32
|
||
|
voaacenc_core_mem_check (VO_S32 uID, VO_PTR pBuffer, VO_U32 uSize)
|
||
|
{
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static gboolean
|
||
|
voaacenc_core_init (GstVoAacEnc * voaacenc)
|
||
|
{
|
||
|
VO_CODEC_INIT_USERDATA user_data = { 0 };
|
||
|
voGetAACEncAPI (&voaacenc->codec_api);
|
||
|
|
||
|
voaacenc->mem_operator.Alloc = voaacenc_core_mem_alloc;
|
||
|
voaacenc->mem_operator.Copy = voaacenc_core_mem_copy;
|
||
|
voaacenc->mem_operator.Free = voaacenc_core_mem_free;
|
||
|
voaacenc->mem_operator.Set = voaacenc_core_mem_set;
|
||
|
voaacenc->mem_operator.Check = voaacenc_core_mem_check;
|
||
|
user_data.memflag = VO_IMF_USERMEMOPERATOR;
|
||
|
user_data.memData = &voaacenc->mem_operator;
|
||
|
voaacenc->codec_api.Init (&voaacenc->handle, VO_AUDIO_CodingAAC, &user_data);
|
||
|
|
||
|
if (voaacenc->handle == NULL) {
|
||
|
return FALSE;
|
||
|
}
|
||
|
return TRUE;
|
||
|
|
||
|
}
|
||
|
|
||
|
static gboolean
|
||
|
voaacenc_core_set_parameter (GstVoAacEnc * voaacenc)
|
||
|
{
|
||
|
AACENC_PARAM params = { 0 };
|
||
|
params.sampleRate = voaacenc->rate;
|
||
|
params.bitRate = voaacenc->bitrate;
|
||
|
params.nChannels = voaacenc->channels;
|
||
|
if (voaacenc->output_format) {
|
||
|
params.adtsUsed = 1;
|
||
|
} else {
|
||
|
params.adtsUsed = 0;
|
||
|
}
|
||
|
if (voaacenc->codec_api.SetParam (voaacenc->handle, VO_PID_AAC_ENCPARAM,
|
||
|
¶ms) != VO_ERR_NONE) {
|
||
|
return FALSE;
|
||
|
}
|
||
|
return TRUE;
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
voaacenc_core_uninit (GstVoAacEnc * voaacenc)
|
||
|
{
|
||
|
if (voaacenc->handle) {
|
||
|
voaacenc->codec_api.Uninit (voaacenc->handle);
|
||
|
voaacenc->handle = NULL;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static gint
|
||
|
voaacenc_get_rate_index (gint rate)
|
||
|
{
|
||
|
static const gint rate_table[] = {
|
||
|
96000, 88200, 64000, 48000, 44100, 32000,
|
||
|
24000, 22050, 16000, 12000, 11025, 8000
|
||
|
};
|
||
|
gint i;
|
||
|
for (i = 0; i < G_N_ELEMENTS (rate_table); ++i) {
|
||
|
if (rate == rate_table[i]) {
|
||
|
return i;
|
||
|
}
|
||
|
}
|
||
|
return -1;
|
||
|
}
|