/* GStreamer * Copyright (C) 2003 Benjamin Otte * Copyright (C) 2005 Thomas Vander Stichele * Copyright (C) 2011 Wim Taymans * * gstaudioconvert.c: Convert audio to different audio formats automatically * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * SECTION:element-audioconvert * @title: audioconvert * * Audioconvert converts raw audio buffers between various possible formats. * It supports integer to float conversion, width/depth conversion, * signedness and endianness conversion and channel transformations * (ie. upmixing and downmixing), as well as dithering and noise-shaping. * * ## Example launch line * |[ * gst-launch-1.0 -v -m audiotestsrc ! audioconvert ! audio/x-raw,format=S8,channels=2 ! level ! fakesink silent=TRUE * ]| * This pipeline converts audio to 8-bit. The level element shows that * the output levels still match the one for a sine wave. * |[ * gst-launch-1.0 -v -m uridecodebin uri=file:///path/to/audio.flac ! audioconvert ! vorbisenc ! oggmux ! filesink location=audio.ogg * ]| * The vorbis encoder takes float audio data instead of the integer data * output by most other audio elements. This pipeline decodes a FLAC audio file * (or any other audio file for which decoders are installed) and re-encodes * it into an Ogg/Vorbis audio file. * * A mix matrix can be passed to audioconvert, that will govern the * remapping of input to output channels. * This is required if the input channels are unpositioned and no standard layout can be determined. * If an empty mix matrix is specified, a (potentially truncated) identity matrix will be generated. * * ## Example matrix generation code * To generate the matrix using code: * * |[ * GValue v = G_VALUE_INIT; * GValue v2 = G_VALUE_INIT; * GValue v3 = G_VALUE_INIT; * * g_value_init (&v2, GST_TYPE_ARRAY); * g_value_init (&v3, G_TYPE_FLOAT); * g_value_set_float (&v3, 1); * gst_value_array_append_value (&v2, &v3); * g_value_unset (&v3); * [ Repeat for as many float as your input channels - unset and reinit v3 ] * g_value_init (&v, GST_TYPE_ARRAY); * gst_value_array_append_value (&v, &v2); * g_value_unset (&v2); * [ Repeat for as many v2's as your output channels - unset and reinit v2] * g_object_set_property (G_OBJECT (audioconvert), "mix-matrix", &v); * g_value_unset (&v); * ]| * * ## Example launch line * |[ * gst-launch-1.0 audiotestsrc ! audio/x-raw, channels=4 ! audioconvert mix-matrix="<<(float)1.0, (float)0.0, (float)0.0, (float)0.0>, <(float)0.0, (float)1.0, (float)0.0, (float)0.0>>" ! audio/x-raw,channels=2 ! autoaudiosink * ]| * * * ## Example empty matrix generation code * |[ * GValue v = G_VALUE_INIT; * * g_value_init (&v, GST_TYPE_ARRAY); * g_object_set_property (G_OBJECT (audioconvert), "mix-matrix", &v); * g_value_unset (&v); * ]| * * ## Example empty matrix launch line * |[ * gst-launch-1.0 -v audiotestsrc ! audio/x-raw,channels=8 ! audioconvert mix-matrix="<>" ! audio/x-raw,channels=16,channel-mask=\(bitmask\)0x0000000000000000 ! fakesink * ]| * * If input channels are unpositioned but follow a standard layout, they can be * automatically positioned according to their index using one of the reorder * configurations. * * ## Example with unpositioned input channels reordering * |[ * gst-launch-1.0 -v audiotestsrc ! audio/x-raw,channels=6,channel-mask=\(bitmask\)0x0000000000000000 ! audioconvert input-channels-reorder-mode=unpositioned input-channels-reorder=smpte ! fakesink * ]| * In this case the input channels will be automatically positioned to the * SMPTE order (left, right, center, lfe, rear-left and rear-right). * * The input channels reorder configurations can also be used to force the * repositioning of the input channels when needed, for example when channels' * positions are not correctly identified in an encoded file. * * ## Example with the forced reordering of input channels wrongly positioned * |[ * gst-launch-1.0 -v audiotestsrc ! audio/x-raw,channels=3,channel-mask=\(bitmask\)0x0000000000000034 ! audioconvert input-channels-reorder-mode=force input-channels-reorder=aac ! fakesink * ]| * In this case the input channels are positioned upstream as center, * rear-left and rear-right in this order. Using the "force" reorder mode and * the "aac" order, the input channels are going to be repositioned to left, * right and lfe, ignoring the actual value of the `channel-mask` in the input * caps. */ /* * design decisions: * - audioconvert converts buffers in a set of supported caps. If it supports * a caps, it supports conversion from these caps to any other caps it * supports. (example: if it does A=>B and A=>C, it also does B=>C) * - audioconvert does not save state between buffers. Every incoming buffer is * converted and the converted buffer is pushed out. * conclusion: * audioconvert is not supposed to be a one-element-does-anything solution for * audio conversions. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gstaudioconvert.h" GST_DEBUG_CATEGORY (audio_convert_debug); GST_DEBUG_CATEGORY_STATIC (GST_CAT_PERFORMANCE); #define GST_CAT_DEFAULT (audio_convert_debug) /*** DEFINITIONS **************************************************************/ /* type functions */ static void gst_audio_convert_dispose (GObject * obj); /* gstreamer functions */ static gboolean gst_audio_convert_get_unit_size (GstBaseTransform * base, GstCaps * caps, gsize * size); static GstCaps *gst_audio_convert_transform_caps (GstBaseTransform * base, GstPadDirection direction, GstCaps * caps, GstCaps * filter); static GstCaps *gst_audio_convert_fixate_caps (GstBaseTransform * base, GstPadDirection direction, GstCaps * caps, GstCaps * othercaps); static gboolean gst_audio_convert_set_caps (GstBaseTransform * base, GstCaps * incaps, GstCaps * outcaps); static GstFlowReturn gst_audio_convert_transform (GstBaseTransform * base, GstBuffer * inbuf, GstBuffer * outbuf); static GstFlowReturn gst_audio_convert_transform_ip (GstBaseTransform * base, GstBuffer * buf); static gboolean gst_audio_convert_transform_meta (GstBaseTransform * trans, GstBuffer * outbuf, GstMeta * meta, GstBuffer * inbuf); static GstFlowReturn gst_audio_convert_submit_input_buffer (GstBaseTransform * base, gboolean is_discont, GstBuffer * input); static GstFlowReturn gst_audio_convert_prepare_output_buffer (GstBaseTransform * base, GstBuffer * inbuf, GstBuffer ** outbuf); static void gst_audio_convert_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_audio_convert_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); /* AudioConvert signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { PROP_0, PROP_DITHERING, PROP_NOISE_SHAPING, PROP_MIX_MATRIX, PROP_DITHERING_THRESHOLD, PROP_INPUT_CHANNELS_REORDER, PROP_INPUT_CHANNELS_REORDER_MODE }; #define DEBUG_INIT \ GST_DEBUG_CATEGORY_INIT (audio_convert_debug, "audioconvert", 0, "audio conversion element"); \ GST_DEBUG_CATEGORY_GET (GST_CAT_PERFORMANCE, "GST_PERFORMANCE"); #define gst_audio_convert_parent_class parent_class G_DEFINE_TYPE_WITH_CODE (GstAudioConvert, gst_audio_convert, GST_TYPE_BASE_TRANSFORM, DEBUG_INIT); GST_ELEMENT_REGISTER_DEFINE (audioconvert, "audioconvert", GST_RANK_PRIMARY, GST_TYPE_AUDIO_CONVERT); /*** GSTREAMER PROTOTYPES *****************************************************/ #define STATIC_CAPS \ GST_STATIC_CAPS (GST_AUDIO_CAPS_MAKE (GST_AUDIO_FORMATS_ALL) \ ", layout = (string) { interleaved, non-interleaved }") static GstStaticPadTemplate gst_audio_convert_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, STATIC_CAPS); static GstStaticPadTemplate gst_audio_convert_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, STATIC_CAPS); /* cached quark to avoid contention on the global quark table lock */ #define META_TAG_AUDIO meta_tag_audio_quark static GQuark meta_tag_audio_quark; /*** TYPE FUNCTIONS ***********************************************************/ #define GST_TYPE_AUDIO_CONVERT_INPUT_CHANNELS_REORDER (gst_audio_convert_input_channels_reorder_get_type ()) static GType gst_audio_convert_input_channels_reorder_get_type (void) { static GType reorder_type = 0; if (g_once_init_enter (&reorder_type)) { static GEnumValue reorder_types[] = { {GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_GST, "Reorder the input channels using the default GStreamer order", "gst"}, {GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_SMPTE, "Reorder the input channels using the SMPTE order", "smpte"}, {GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_CINE, "Reorder the input channels using the CINE order", "cine"}, {GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_AC3, "Reorder the input channels using the AC3 order", "ac3"}, {GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_AAC, "Reorder the input channels using the AAC order", "aac"}, {GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MONO, "Reorder and mix all input channels to a single mono channel", "mono"}, {GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_ALTERNATE, "Reorder and mix all input channels to a single left and a single right stereo channels alternately", "alternate"}, {0, NULL, NULL}, }; GType type = g_enum_register_static ("GstAudioConvertInputChannelsReorder", reorder_types); g_once_init_leave (&reorder_type, type); } return reorder_type; } #define GST_TYPE_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MODE (gst_audio_convert_input_channels_reorder_mode_get_type ()) static GType gst_audio_convert_input_channels_reorder_mode_get_type (void) { static GType reorder_mode_type = 0; if (g_once_init_enter (&reorder_mode_type)) { static GEnumValue reorder_mode_types[] = { {GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MODE_NONE, "Never reorder the input channels", "none"}, {GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MODE_UNPOSITIONED, "Reorder the input channels only if they are unpositioned", "unpositioned"}, {GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MODE_FORCE, "Always reorder the input channels according to the selected configuration", "force"}, {0, NULL, NULL}, }; GType type = g_enum_register_static ("GstAudioConvertInputChannelsReorderMode", reorder_mode_types); g_once_init_leave (&reorder_mode_type, type); } return reorder_mode_type; } static void gst_audio_convert_class_init (GstAudioConvertClass * klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GstElementClass *element_class = GST_ELEMENT_CLASS (klass); GstBaseTransformClass *basetransform_class = GST_BASE_TRANSFORM_CLASS (klass); gobject_class->dispose = gst_audio_convert_dispose; gobject_class->set_property = gst_audio_convert_set_property; gobject_class->get_property = gst_audio_convert_get_property; g_object_class_install_property (gobject_class, PROP_DITHERING, g_param_spec_enum ("dithering", "Dithering", "Selects between different dithering methods.", GST_TYPE_AUDIO_DITHER_METHOD, GST_AUDIO_DITHER_TPDF, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_NOISE_SHAPING, g_param_spec_enum ("noise-shaping", "Noise shaping", "Selects between different noise shaping methods.", GST_TYPE_AUDIO_NOISE_SHAPING_METHOD, GST_AUDIO_NOISE_SHAPING_NONE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstAudioConvert:mix-matrix: * * Transformation matrix for input/output channels. * Required if the input channels are unpositioned and no standard layout can be determined. * Setting an empty matrix like \"< >\" will generate an identity matrix." * */ g_object_class_install_property (gobject_class, PROP_MIX_MATRIX, gst_param_spec_array ("mix-matrix", "Input/output channel matrix", "Transformation matrix for input/output channels.", gst_param_spec_array ("matrix-rows", "rows", "rows", g_param_spec_float ("matrix-cols", "cols", "cols", -1, 1, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS), G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS), G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstAudioConvert:dithering-threshold: * * Threshold for the output bit depth at/below which to apply dithering. * * Since: 1.22 */ g_object_class_install_property (gobject_class, PROP_DITHERING_THRESHOLD, g_param_spec_uint ("dithering-threshold", "Dithering Threshold", "Threshold for the output bit depth at/below which to apply dithering.", 0, 32, 20, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstAudioConvert:input-channels-reorder: * * The positions configuration to use to reorder the input channels * consecutively according to their index. If a `mix-matrix` is specified, * this configuration is ignored. * * When the input channels reordering is activated (because the * `input-channels-reorder-mode` property is * @GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MODE_FORCE or the input channels * are unpositioned and the reorder mode is * @GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MODE_UNPOSITIONED), input * channels will be reordered consecutively according to their index * independently of the `channel-mask` value in the sink pad audio caps. * * Since: 1.26 */ g_object_class_install_property (gobject_class, PROP_INPUT_CHANNELS_REORDER, g_param_spec_enum ("input-channels-reorder", "Input Channels Reorder", "The positions configuration to use to reorder the input channels consecutively according to their index.", GST_TYPE_AUDIO_CONVERT_INPUT_CHANNELS_REORDER, GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_GST, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gst_type_mark_as_plugin_api (GST_TYPE_AUDIO_CONVERT_INPUT_CHANNELS_REORDER, 0); /** * GstAudioConvert:input-channels-reorder-mode: * * The input channels reordering mode used to apply the selected positions * configuration. * * Since: 1.26 */ g_object_class_install_property (gobject_class, PROP_INPUT_CHANNELS_REORDER_MODE, g_param_spec_enum ("input-channels-reorder-mode", "Input Channels Reorder Mode", "The input channels reordering mode used to apply the selected positions configuration.", GST_TYPE_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MODE, GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MODE_NONE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gst_type_mark_as_plugin_api (GST_TYPE_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MODE, 0); gst_element_class_add_static_pad_template (element_class, &gst_audio_convert_src_template); gst_element_class_add_static_pad_template (element_class, &gst_audio_convert_sink_template); gst_element_class_set_static_metadata (element_class, "Audio converter", "Filter/Converter/Audio", "Convert audio to different formats", "Benjamin Otte "); basetransform_class->get_unit_size = GST_DEBUG_FUNCPTR (gst_audio_convert_get_unit_size); basetransform_class->transform_caps = GST_DEBUG_FUNCPTR (gst_audio_convert_transform_caps); basetransform_class->fixate_caps = GST_DEBUG_FUNCPTR (gst_audio_convert_fixate_caps); basetransform_class->set_caps = GST_DEBUG_FUNCPTR (gst_audio_convert_set_caps); basetransform_class->transform = GST_DEBUG_FUNCPTR (gst_audio_convert_transform); basetransform_class->transform_ip = GST_DEBUG_FUNCPTR (gst_audio_convert_transform_ip); basetransform_class->transform_meta = GST_DEBUG_FUNCPTR (gst_audio_convert_transform_meta); basetransform_class->submit_input_buffer = GST_DEBUG_FUNCPTR (gst_audio_convert_submit_input_buffer); basetransform_class->prepare_output_buffer = GST_DEBUG_FUNCPTR (gst_audio_convert_prepare_output_buffer); basetransform_class->transform_ip_on_passthrough = FALSE; meta_tag_audio_quark = g_quark_from_static_string (GST_META_TAG_AUDIO_STR); } static void gst_audio_convert_init (GstAudioConvert * this) { this->dither = GST_AUDIO_DITHER_TPDF; this->dither_threshold = 20; this->ns = GST_AUDIO_NOISE_SHAPING_NONE; g_value_init (&this->mix_matrix, GST_TYPE_ARRAY); gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM (this), TRUE); } static void gst_audio_convert_dispose (GObject * obj) { GstAudioConvert *this = GST_AUDIO_CONVERT (obj); if (this->convert) { gst_audio_converter_free (this->convert); this->convert = NULL; } g_value_unset (&this->mix_matrix); G_OBJECT_CLASS (parent_class)->dispose (obj); } /*** INPUT CHANNELS REORDER FUNCTIONS *****************************************/ typedef struct { gboolean has_stereo; gboolean lfe_as_last_channel; } GstAudioConvertInputChannelsReorderConfig; static const GstAudioConvertInputChannelsReorderConfig input_channels_reorder_config[] = { // GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_GST {TRUE, FALSE}, // GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_SMPTE {TRUE, FALSE}, // GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_CINE {TRUE, TRUE}, // GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_AC3 {TRUE, TRUE}, // GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_AAC {TRUE, TRUE}, // GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MONO {FALSE, FALSE}, // GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_ALTERNATE {TRUE, FALSE} }; #define GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_NB G_N_ELEMENTS (input_channels_reorder_config) static const GstAudioChannelPosition channel_position_per_reorder_config [GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_NB][64] = { // GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_GST { GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE1, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER, GST_AUDIO_CHANNEL_POSITION_REAR_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE2, GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT, GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT, GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_TOP_CENTER, GST_AUDIO_CHANNEL_POSITION_TOP_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_TOP_REAR_RIGHT, GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_LEFT, GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_RIGHT, GST_AUDIO_CHANNEL_POSITION_TOP_REAR_CENTER, GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_WIDE_LEFT, GST_AUDIO_CHANNEL_POSITION_WIDE_RIGHT, GST_AUDIO_CHANNEL_POSITION_SURROUND_LEFT, GST_AUDIO_CHANNEL_POSITION_SURROUND_RIGHT, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, }, // GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_SMPTE (see: https://www.sis.se/api/document/preview/919377/) { GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // Left front (L) GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // Right front (R) GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, // Center front (C) GST_AUDIO_CHANNEL_POSITION_LFE1, // Low frequency enhancement (LFE) GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, // Left surround (Ls) GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, // Right surround (Rs) GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER, // Left front center (Lc) GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER, // Right front center (Rc) GST_AUDIO_CHANNEL_POSITION_SURROUND_LEFT, // Rear surround left (Lsr) GST_AUDIO_CHANNEL_POSITION_SURROUND_RIGHT, // Rear surround right (Rsr) GST_AUDIO_CHANNEL_POSITION_REAR_CENTER, // Rear center (Cs) GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT, // Left side surround (Lss) GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT, // Right side surround (Rss) GST_AUDIO_CHANNEL_POSITION_WIDE_LEFT, // Left wide front (Lw) GST_AUDIO_CHANNEL_POSITION_WIDE_RIGHT, // Right wide front (Rw) GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_LEFT, // Left front vertical height (Lv) GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_RIGHT, // Right front vertical height (Rv) GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_CENTER, // Center front vertical height (Cv) GST_AUDIO_CHANNEL_POSITION_TOP_REAR_LEFT, // Left surround vertical height rear (Lvr) GST_AUDIO_CHANNEL_POSITION_TOP_REAR_RIGHT, // Right surround vertical height rear (Rvr) GST_AUDIO_CHANNEL_POSITION_TOP_REAR_CENTER, // Center vertical height rear (Cvr) GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_LEFT, // Left vertical height side surround (Lvss) GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_RIGHT, // Right vertical height side surround (Rvss) GST_AUDIO_CHANNEL_POSITION_TOP_CENTER, // Top center surround (Ts) GST_AUDIO_CHANNEL_POSITION_LFE2, // Low frequency enhancement 2 (LFE2) GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_LEFT, // Left front vertical bottom (Lb) GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_RIGHT, // Right front vertical bottom (Rb) GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_CENTER, // Center front vertical bottom (Cb) GST_AUDIO_CHANNEL_POSITION_INVALID, // Left vertical height surround (Lvs) GST_AUDIO_CHANNEL_POSITION_INVALID, // Right vertical height surround (Rvs) GST_AUDIO_CHANNEL_POSITION_INVALID, // Reserved GST_AUDIO_CHANNEL_POSITION_INVALID, // Reserved GST_AUDIO_CHANNEL_POSITION_INVALID, // Reserved GST_AUDIO_CHANNEL_POSITION_INVALID, // Reserved GST_AUDIO_CHANNEL_POSITION_INVALID, // Low frequency enhancement 3 (LFE3) GST_AUDIO_CHANNEL_POSITION_INVALID, // Left edge of screen (Leos) GST_AUDIO_CHANNEL_POSITION_INVALID, // Right edge of screen (Reos) GST_AUDIO_CHANNEL_POSITION_INVALID, // Half-way between center of screen and left edge of screen (Hwbcal) GST_AUDIO_CHANNEL_POSITION_INVALID, // Half-way between center of screen and right edge of screen (Hwbcar) GST_AUDIO_CHANNEL_POSITION_INVALID, // Left back surround (Lbs) GST_AUDIO_CHANNEL_POSITION_INVALID, // Right back surround (Rbs) GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, }, // GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_CINE { GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, // C GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, // Ls GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, // Rs GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER, // Lc GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER, // Rc GST_AUDIO_CHANNEL_POSITION_SURROUND_LEFT, // Lsr GST_AUDIO_CHANNEL_POSITION_SURROUND_RIGHT, // Rsr GST_AUDIO_CHANNEL_POSITION_REAR_CENTER, // Cs GST_AUDIO_CHANNEL_POSITION_TOP_CENTER, // Ts GST_AUDIO_CHANNEL_POSITION_WIDE_LEFT, // Lw GST_AUDIO_CHANNEL_POSITION_WIDE_RIGHT, // Rw GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_LEFT, // Lv GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_RIGHT, // Rv GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_CENTER, // Cv GST_AUDIO_CHANNEL_POSITION_TOP_REAR_LEFT, // Lvr GST_AUDIO_CHANNEL_POSITION_TOP_REAR_RIGHT, // Rvr GST_AUDIO_CHANNEL_POSITION_TOP_REAR_CENTER, // Cvr GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT, // Lss GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT, // Rss GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_LEFT, // Lvss GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_RIGHT, // Rvss GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_LEFT, // Lb GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_RIGHT, // Rb GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_CENTER, // Cb GST_AUDIO_CHANNEL_POSITION_LFE2, // LFE2 GST_AUDIO_CHANNEL_POSITION_LFE1, // LFE1 GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, }, // GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_AC3 { GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, // C GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, // Ls GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, // Rs GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER, // Lc GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER, // Rc GST_AUDIO_CHANNEL_POSITION_SURROUND_LEFT, // Lsr GST_AUDIO_CHANNEL_POSITION_SURROUND_RIGHT, // Rsr GST_AUDIO_CHANNEL_POSITION_REAR_CENTER, // Cs GST_AUDIO_CHANNEL_POSITION_TOP_CENTER, // Ts GST_AUDIO_CHANNEL_POSITION_WIDE_LEFT, // Lw GST_AUDIO_CHANNEL_POSITION_WIDE_RIGHT, // Rw GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_LEFT, // Lv GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_RIGHT, // Rv GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_CENTER, // Cv GST_AUDIO_CHANNEL_POSITION_TOP_REAR_LEFT, // Lvr GST_AUDIO_CHANNEL_POSITION_TOP_REAR_RIGHT, // Rvr GST_AUDIO_CHANNEL_POSITION_TOP_REAR_CENTER, // Cvr GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT, // Lss GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT, // Rss GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_LEFT, // Lvss GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_RIGHT, // Rvss GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_LEFT, // Lb GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_RIGHT, // Rb GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_CENTER, // Cb GST_AUDIO_CHANNEL_POSITION_LFE2, // LFE2 GST_AUDIO_CHANNEL_POSITION_LFE1, // LFE1 GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, }, // GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_AAC { GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, // C GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, // Ls GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, // Rs GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER, // Lc GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER, // Rc GST_AUDIO_CHANNEL_POSITION_SURROUND_LEFT, // Lsr GST_AUDIO_CHANNEL_POSITION_SURROUND_RIGHT, // Rsr GST_AUDIO_CHANNEL_POSITION_REAR_CENTER, // Cs GST_AUDIO_CHANNEL_POSITION_TOP_CENTER, // Ts GST_AUDIO_CHANNEL_POSITION_WIDE_LEFT, // Lw GST_AUDIO_CHANNEL_POSITION_WIDE_RIGHT, // Rw GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_LEFT, // Lv GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_RIGHT, // Rv GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_CENTER, // Cv GST_AUDIO_CHANNEL_POSITION_TOP_REAR_LEFT, // Lvr GST_AUDIO_CHANNEL_POSITION_TOP_REAR_RIGHT, // Rvr GST_AUDIO_CHANNEL_POSITION_TOP_REAR_CENTER, // Cvr GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT, // Lss GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT, // Rss GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_LEFT, // Lvss GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_RIGHT, // Rvss GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_LEFT, // Lb GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_RIGHT, // Rb GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_CENTER, // Cb GST_AUDIO_CHANNEL_POSITION_LFE2, // LFE2 GST_AUDIO_CHANNEL_POSITION_LFE1, // LFE1 GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, GST_AUDIO_CHANNEL_POSITION_INVALID, }, // GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MONO { GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, GST_AUDIO_CHANNEL_POSITION_MONO, }, // GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_ALTERNATE { GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, // L GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, // R } }; static const gchar *gst_audio_convert_input_channels_reorder_to_string (GstAudioConvertInputChannelsReorder reorder) { switch (reorder) { case GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_GST: return "GST"; case GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_SMPTE: return "SMPTE"; case GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_CINE: return "CINE"; case GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_AC3: return "AC3"; case GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_AAC: return "AAC"; case GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MONO: return "MONO"; case GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_ALTERNATE: return "ALTERNATE"; default: return "UNKNOWN"; } } static gboolean gst_audio_convert_position_channels_from_reorder_configuration (gint channels, GstAudioConvertInputChannelsReorder reorder, GstAudioChannelPosition * position) { g_return_val_if_fail (channels > 0, FALSE); g_return_val_if_fail (reorder >= 0 && reorder < GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_NB, FALSE); g_return_val_if_fail (position != NULL, FALSE); GST_DEBUG ("ordering %d audio channel(s) according to the %s configuration", channels, gst_audio_convert_input_channels_reorder_to_string (reorder)); if (channels == 1) { position[0] = GST_AUDIO_CHANNEL_POSITION_MONO; return TRUE; } if (channels == 2 && input_channels_reorder_config[reorder].has_stereo) { position[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT; position[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT; return TRUE; } for (gint i = 0; i < channels; ++i) { if (i < G_N_ELEMENTS (channel_position_per_reorder_config[reorder])) position[i] = channel_position_per_reorder_config[reorder][i]; else position[i] = GST_AUDIO_CHANNEL_POSITION_INVALID; } if (channels > 2 && input_channels_reorder_config[reorder].lfe_as_last_channel) { position[channels - 1] = GST_AUDIO_CHANNEL_POSITION_LFE1; if (channels == 3 && input_channels_reorder_config[reorder].has_stereo) { position[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT; position[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT; } } return TRUE; } /*** GSTREAMER FUNCTIONS ******************************************************/ /* BaseTransform vmethods */ static gboolean gst_audio_convert_get_unit_size (GstBaseTransform * base, GstCaps * caps, gsize * size) { GstAudioInfo info; g_assert (size); if (!gst_audio_info_from_caps (&info, caps)) goto parse_error; *size = info.bpf; GST_DEBUG_OBJECT (base, "unit_size = %" G_GSIZE_FORMAT, *size); return TRUE; parse_error: { GST_WARNING_OBJECT (base, "failed to parse caps to get unit_size"); return FALSE; } } static gboolean remove_format_from_structure (GstCapsFeatures * features, GstStructure * structure, gpointer user_data G_GNUC_UNUSED) { gst_structure_remove_field (structure, "format"); return TRUE; } static gboolean remove_layout_from_structure (GstCapsFeatures * features, GstStructure * structure, gpointer user_data G_GNUC_UNUSED) { gst_structure_remove_field (structure, "layout"); return TRUE; } static gboolean remove_channels_from_structure (GstCapsFeatures * features, GstStructure * s, gpointer user_data) { guint64 mask; gint channels; gboolean force_removing = *(gboolean *) user_data; /* Only remove the channels and channel-mask if a mix matrix was manually * specified or an input channels reordering is applied, or if no * channel-mask is specified, for non-NONE channel layouts or for a single * channel layout. */ if (force_removing || !gst_structure_get (s, "channel-mask", GST_TYPE_BITMASK, &mask, NULL) || (mask != 0 || (gst_structure_get_int (s, "channels", &channels) && channels == 1))) { gst_structure_remove_fields (s, "channel-mask", "channels", NULL); } return TRUE; } static gboolean add_other_channels_to_structure (GstCapsFeatures * features, GstStructure * s, gpointer user_data) { gint other_channels = GPOINTER_TO_INT (user_data); gst_structure_set (s, "channels", G_TYPE_INT, other_channels, NULL); return TRUE; } /* The caps can be transformed into any other caps with format info removed. * However, we should prefer passthrough, so if passthrough is possible, * put it first in the list. */ static GstCaps * gst_audio_convert_transform_caps (GstBaseTransform * btrans, GstPadDirection direction, GstCaps * caps, GstCaps * filter) { GstCaps *tmp, *tmp2; GstCaps *result; GstAudioConvert *this = GST_AUDIO_CONVERT (btrans); tmp = gst_caps_copy (caps); gst_caps_map_in_place (tmp, remove_format_from_structure, NULL); gst_caps_map_in_place (tmp, remove_layout_from_structure, NULL); GST_OBJECT_LOCK (this); gboolean force_removing = this->mix_matrix_is_set || (direction == GST_PAD_SINK && this->input_channels_reorder_mode != GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MODE_NONE); gst_caps_map_in_place (tmp, remove_channels_from_structure, &force_removing); /* We can infer the required input / output channels based on the * matrix dimensions */ if (gst_value_array_get_size (&this->mix_matrix)) { gint other_channels; if (direction == GST_PAD_SRC) { const GValue *first_row = gst_value_array_get_value (&this->mix_matrix, 0); other_channels = gst_value_array_get_size (first_row); } else { other_channels = gst_value_array_get_size (&this->mix_matrix); } gst_caps_map_in_place (tmp, add_other_channels_to_structure, GINT_TO_POINTER (other_channels)); } GST_OBJECT_UNLOCK (this); if (filter) { tmp2 = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST); gst_caps_unref (tmp); tmp = tmp2; } result = tmp; GST_DEBUG_OBJECT (btrans, "transformed %" GST_PTR_FORMAT " into %" GST_PTR_FORMAT, caps, result); return result; } /* Count the number of bits set * Optimized for the common case, assuming that the number of channels * (i.e. bits set) is small */ static gint n_bits_set (guint64 x) { gint c; for (c = 0; x; c++) x &= x - 1; return c; } /* Reduce the mask to the n_chans lowest set bits * * The algorithm clears the n_chans lowest set bits and subtracts the * result from the original mask to get the desired mask. * It is optimized for the common case where n_chans is a small * number. In the worst case, however, it stops after 64 iterations. */ static guint64 find_suitable_mask (guint64 mask, gint n_chans) { guint64 x = mask; for (; x && n_chans; n_chans--) x &= x - 1; g_assert (x || n_chans == 0); /* assertion fails if mask contained less bits than n_chans * or n_chans was < 0 */ return mask - x; } static void gst_audio_convert_fixate_format (GstBaseTransform * base, GstStructure * ins, GstStructure * outs) { const gchar *in_format; const GValue *format; const GstAudioFormatInfo *in_info, *out_info = NULL; GstAudioFormatFlags in_flags, out_flags = 0; gint in_depth, out_depth = -1; gint i, len; in_format = gst_structure_get_string (ins, "format"); if (!in_format) return; format = gst_structure_get_value (outs, "format"); /* should not happen */ if (format == NULL) return; /* nothing to fixate? */ if (!GST_VALUE_HOLDS_LIST (format)) return; in_info = gst_audio_format_get_info (gst_audio_format_from_string (in_format)); if (!in_info) return; in_flags = GST_AUDIO_FORMAT_INFO_FLAGS (in_info); in_flags &= ~(GST_AUDIO_FORMAT_FLAG_UNPACK); in_flags &= ~(GST_AUDIO_FORMAT_FLAG_SIGNED); in_depth = GST_AUDIO_FORMAT_INFO_DEPTH (in_info); len = gst_value_list_get_size (format); for (i = 0; i < len; i++) { const GstAudioFormatInfo *t_info; GstAudioFormatFlags t_flags; gboolean t_flags_better; const GValue *val; const gchar *fname; gint t_depth; val = gst_value_list_get_value (format, i); if (!G_VALUE_HOLDS_STRING (val)) continue; fname = g_value_get_string (val); t_info = gst_audio_format_get_info (gst_audio_format_from_string (fname)); if (!t_info) continue; /* accept input format immediately */ if (strcmp (fname, in_format) == 0) { out_info = t_info; break; } t_flags = GST_AUDIO_FORMAT_INFO_FLAGS (t_info); t_flags &= ~(GST_AUDIO_FORMAT_FLAG_UNPACK); t_flags &= ~(GST_AUDIO_FORMAT_FLAG_SIGNED); t_depth = GST_AUDIO_FORMAT_INFO_DEPTH (t_info); /* Any output format is better than no output format at all */ if (!out_info) { out_info = t_info; out_depth = t_depth; out_flags = t_flags; continue; } t_flags_better = (t_flags == in_flags && out_flags != in_flags); if (t_depth == in_depth && (out_depth != in_depth || t_flags_better)) { /* Prefer to use the first format that has the same depth with the same * flags, and if none with the same flags exist use the first other one * that has the same depth */ out_info = t_info; out_depth = t_depth; out_flags = t_flags; } else if (t_depth >= in_depth && (in_depth > out_depth || (out_depth >= in_depth && t_flags_better))) { /* Otherwise use the first format that has a higher depth with the same flags, * if none with the same flags exist use the first other one that has a higher * depth */ out_info = t_info; out_depth = t_depth; out_flags = t_flags; } else if ((t_depth > out_depth && out_depth < in_depth) || (t_flags_better && out_depth == t_depth)) { /* Else get at least the one with the highest depth, ideally with the same flags */ out_info = t_info; out_depth = t_depth; out_flags = t_flags; } } if (out_info) gst_structure_set (outs, "format", G_TYPE_STRING, GST_AUDIO_FORMAT_INFO_NAME (out_info), NULL); } static void gst_audio_convert_fixate_channels (GstBaseTransform * base, GstStructure * ins, GstStructure * outs) { gint in_chans, out_chans; guint64 in_mask = 0, out_mask = 0; gboolean has_in_mask = FALSE, has_out_mask = FALSE; if (!gst_structure_get_int (ins, "channels", &in_chans)) return; /* this shouldn't really happen, should it? */ if (!gst_structure_has_field (outs, "channels")) { /* we could try to get the implied number of channels from the layout, * but that seems overdoing it for a somewhat exotic corner case */ gst_structure_remove_field (outs, "channel-mask"); return; } /* ok, let's fixate the channels if they are not fixated yet */ gst_structure_fixate_field_nearest_int (outs, "channels", in_chans); if (!gst_structure_get_int (outs, "channels", &out_chans)) { /* shouldn't really happen ... */ gst_structure_remove_field (outs, "channel-mask"); return; } /* get the channel layout of the output if any */ has_out_mask = gst_structure_has_field (outs, "channel-mask"); if (has_out_mask) { gst_structure_get (outs, "channel-mask", GST_TYPE_BITMASK, &out_mask, NULL); } else { /* channels == 1 => MONO */ if (out_chans == 2) { out_mask = GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_LEFT) | GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_RIGHT); has_out_mask = TRUE; gst_structure_set (outs, "channel-mask", GST_TYPE_BITMASK, out_mask, NULL); } } /* get the channel layout of the input if any */ has_in_mask = gst_structure_has_field (ins, "channel-mask"); if (has_in_mask) { gst_structure_get (ins, "channel-mask", GST_TYPE_BITMASK, &in_mask, NULL); } else { /* channels == 1 => MONO */ if (in_chans == 2) { in_mask = GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_LEFT) | GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_RIGHT); has_in_mask = TRUE; } else if (in_chans > 2) g_warning ("%s: Upstream caps contain no channel mask", GST_ELEMENT_NAME (base)); } if (!has_out_mask && out_chans == 1 && (in_chans != out_chans || !has_in_mask)) return; /* nothing to do, default layout will be assumed */ if (in_chans == out_chans && (has_in_mask || in_chans == 1)) { /* same number of channels and no output layout: just use input layout */ if (!has_out_mask) { /* in_chans == 1 handled above already */ gst_structure_set (outs, "channel-mask", GST_TYPE_BITMASK, in_mask, NULL); return; } /* If both masks are the same we're done, this includes the NONE layout case */ if (in_mask == out_mask) return; /* if output layout is fixed already and looks sane, we're done */ if (n_bits_set (out_mask) == out_chans) return; if (n_bits_set (out_mask) < in_chans) { /* Not much we can do here, this shouldn't just happen */ g_warning ("%s: Invalid downstream channel-mask with too few bits set", GST_ELEMENT_NAME (base)); } else { guint64 intersection; /* if the output layout is not fixed, check if the output layout contains * the input layout */ intersection = in_mask & out_mask; if (n_bits_set (intersection) >= in_chans) { gst_structure_set (outs, "channel-mask", GST_TYPE_BITMASK, in_mask, NULL); return; } /* output layout is not fixed and does not contain the input layout, so * just pick the first possibility */ intersection = find_suitable_mask (out_mask, out_chans); if (intersection) { gst_structure_set (outs, "channel-mask", GST_TYPE_BITMASK, intersection, NULL); return; } } /* ... else fall back to default layout (NB: out_layout is NULL here) */ GST_WARNING_OBJECT (base, "unexpected output channel layout"); } else { guint64 intersection; /* number of input channels != number of output channels: * if this value contains a list of channel layouts (or even worse: a list * with another list), just pick the first value and repeat until we find a * channel position array or something else that's not a list; we assume * the input if half-way sane and don't try to fall back on other list items * if the first one is something unexpected or non-channel-pos-array-y */ if (n_bits_set (out_mask) >= out_chans) { intersection = find_suitable_mask (out_mask, out_chans); gst_structure_set (outs, "channel-mask", GST_TYPE_BITMASK, intersection, NULL); return; } /* what now?! Just ignore what we're given and use default positions */ GST_WARNING_OBJECT (base, "invalid or unexpected channel-positions"); } /* missing or invalid output layout and we can't use the input layout for * one reason or another, so just pick a default layout (we could be smarter * and try to add/remove channels from the input layout, or pick a default * layout based on LFE-presence in input layout, but let's save that for * another day). For mono, no mask is required and the fallback mask is 0 */ if (out_chans > 1 && (out_mask = gst_audio_channel_get_fallback_mask (out_chans))) { GST_DEBUG_OBJECT (base, "using default channel layout as fallback"); gst_structure_set (outs, "channel-mask", GST_TYPE_BITMASK, out_mask, NULL); } else if (out_chans > 1) { GST_ERROR_OBJECT (base, "Have no default layout for %d channels", out_chans); gst_structure_set (outs, "channel-mask", GST_TYPE_BITMASK, G_GUINT64_CONSTANT (0), NULL); } } /* try to keep as many of the structure members the same by fixating the * possible ranges; this way we convert the least amount of things as possible */ static GstCaps * gst_audio_convert_fixate_caps (GstBaseTransform * base, GstPadDirection direction, GstCaps * caps, GstCaps * othercaps) { GstStructure *ins, *outs; GstCaps *result; GST_DEBUG_OBJECT (base, "trying to fixate othercaps %" GST_PTR_FORMAT " based on caps %" GST_PTR_FORMAT, othercaps, caps); result = gst_caps_intersect (othercaps, caps); if (gst_caps_is_empty (result)) { GstCaps *removed = gst_caps_copy (caps); if (result) gst_caps_unref (result); gst_caps_map_in_place (removed, remove_format_from_structure, NULL); gst_caps_map_in_place (removed, remove_layout_from_structure, NULL); result = gst_caps_intersect (othercaps, removed); gst_caps_unref (removed); if (gst_caps_is_empty (result)) { if (result) gst_caps_unref (result); result = othercaps; } else { gst_caps_unref (othercaps); } } else { gst_caps_unref (othercaps); } GST_DEBUG_OBJECT (base, "now fixating %" GST_PTR_FORMAT, result); /* fixate remaining fields */ result = gst_caps_make_writable (result); ins = gst_caps_get_structure (caps, 0); outs = gst_caps_get_structure (result, 0); gst_audio_convert_fixate_channels (base, ins, outs); gst_audio_convert_fixate_format (base, ins, outs); /* fixate remaining */ result = gst_caps_fixate (result); GST_DEBUG_OBJECT (base, "fixated othercaps to %" GST_PTR_FORMAT, result); return result; } static gboolean gst_audio_convert_ensure_converter (GstBaseTransform * base, GstAudioInfo * in_info, GstAudioInfo * out_info) { GstAudioConvert *this = GST_AUDIO_CONVERT (base); GstStructure *config; gboolean in_place; gboolean ret = TRUE; GST_OBJECT_LOCK (this); if (this->convert) { GST_TRACE_OBJECT (this, "We already have a converter"); goto done; } if (!GST_AUDIO_INFO_IS_VALID (in_info) || !GST_AUDIO_INFO_IS_VALID (out_info)) { GST_LOG_OBJECT (this, "No format information (yet), not creating converter"); goto done; } config = gst_structure_new ("GstAudioConverterConfig", GST_AUDIO_CONVERTER_OPT_DITHER_METHOD, GST_TYPE_AUDIO_DITHER_METHOD, this->dither, GST_AUDIO_CONVERTER_OPT_DITHER_THRESHOLD, G_TYPE_UINT, this->dither_threshold, GST_AUDIO_CONVERTER_OPT_NOISE_SHAPING_METHOD, GST_TYPE_AUDIO_NOISE_SHAPING_METHOD, this->ns, NULL); if (this->mix_matrix_is_set) { gst_structure_set_value (config, GST_AUDIO_CONVERTER_OPT_MIX_MATRIX, &this->mix_matrix); this->convert = gst_audio_converter_new (0, in_info, out_info, config); } else if (this->input_channels_reorder_mode != GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MODE_NONE) { GstAudioFlags in_flags; GstAudioChannelPosition in_position[64]; gboolean restore_in = FALSE; if (this->input_channels_reorder_mode == GST_AUDIO_CONVERT_INPUT_CHANNELS_REORDER_MODE_FORCE || GST_AUDIO_INFO_IS_UNPOSITIONED (in_info)) { in_flags = GST_AUDIO_INFO_FLAGS (in_info); memcpy (in_position, in_info->position, GST_AUDIO_INFO_CHANNELS (in_info) * sizeof (GstAudioChannelPosition)); if (gst_audio_convert_position_channels_from_reorder_configuration (GST_AUDIO_INFO_CHANNELS (in_info), this->input_channels_reorder, in_info->position)) { GST_AUDIO_INFO_FLAGS (in_info) &= ~GST_AUDIO_FLAG_UNPOSITIONED; restore_in = TRUE; } } this->convert = gst_audio_converter_new (0, in_info, out_info, config); if (restore_in) { GST_AUDIO_INFO_FLAGS (in_info) = in_flags; memcpy (in_info->position, in_position, GST_AUDIO_INFO_CHANNELS (in_info) * sizeof (GstAudioChannelPosition)); } } else { this->convert = gst_audio_converter_new (0, in_info, out_info, config); } if (this->convert == NULL) goto no_converter; in_place = gst_audio_converter_supports_inplace (this->convert); GST_OBJECT_UNLOCK (this); gst_base_transform_set_in_place (base, in_place); gst_base_transform_set_passthrough (base, gst_audio_converter_is_passthrough (this->convert)); GST_OBJECT_LOCK (this); done: GST_OBJECT_UNLOCK (this); return ret; no_converter: GST_ERROR_OBJECT (this, "Failed to make converter"); ret = FALSE; goto done; } static gboolean gst_audio_convert_set_caps (GstBaseTransform * base, GstCaps * incaps, GstCaps * outcaps) { GstAudioConvert *this = GST_AUDIO_CONVERT (base); GstAudioInfo in_info; GstAudioInfo out_info; gboolean ret; GST_DEBUG_OBJECT (base, "incaps %" GST_PTR_FORMAT ", outcaps %" GST_PTR_FORMAT, incaps, outcaps); if (this->convert) { gst_audio_converter_free (this->convert); this->convert = NULL; } if (!gst_audio_info_from_caps (&in_info, incaps)) goto invalid_in; if (!gst_audio_info_from_caps (&out_info, outcaps)) goto invalid_out; ret = gst_audio_convert_ensure_converter (base, &in_info, &out_info); if (ret) { this->in_info = in_info; this->out_info = out_info; } done: return ret; /* ERRORS */ invalid_in: { GST_ERROR_OBJECT (base, "invalid input caps"); ret = FALSE; goto done; } invalid_out: { GST_ERROR_OBJECT (base, "invalid output caps"); ret = FALSE; goto done; } } /* if called through gst_audio_convert_transform_ip() inbuf == outbuf */ static GstFlowReturn gst_audio_convert_transform (GstBaseTransform * base, GstBuffer * inbuf, GstBuffer * outbuf) { GstFlowReturn ret; GstAudioConvert *this = GST_AUDIO_CONVERT (base); GstAudioBuffer srcabuf, dstabuf; gboolean inbuf_writable; GstAudioConverterFlags flags; /* https://bugzilla.gnome.org/show_bug.cgi?id=396835 */ if (gst_buffer_get_size (inbuf) == 0) return GST_FLOW_OK; gst_audio_convert_ensure_converter (base, &this->in_info, &this->out_info); if (!this->convert) { GST_ERROR_OBJECT (this, "No audio converter at transform time"); return GST_FLOW_ERROR; } if (inbuf != outbuf) { inbuf_writable = gst_buffer_is_writable (inbuf) && gst_buffer_n_memory (inbuf) == 1 && gst_memory_is_writable (gst_buffer_peek_memory (inbuf, 0)); if (!gst_audio_buffer_map (&srcabuf, &this->in_info, inbuf, inbuf_writable ? GST_MAP_READWRITE : GST_MAP_READ)) goto inmap_error; } else { inbuf_writable = TRUE; } if (!gst_audio_buffer_map (&dstabuf, &this->out_info, outbuf, GST_MAP_WRITE)) goto outmap_error; /* and convert the samples */ flags = 0; if (inbuf_writable) flags |= GST_AUDIO_CONVERTER_FLAG_IN_WRITABLE; if (!GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_GAP)) { if (!gst_audio_converter_samples (this->convert, flags, inbuf != outbuf ? srcabuf.planes : dstabuf.planes, dstabuf.n_samples, dstabuf.planes, dstabuf.n_samples)) goto convert_error; } else { /* Create silence buffer */ gint i; for (i = 0; i < dstabuf.n_planes; i++) { gst_audio_format_info_fill_silence (this->out_info.finfo, dstabuf.planes[i], GST_AUDIO_BUFFER_PLANE_SIZE (&dstabuf)); } } ret = GST_FLOW_OK; done: gst_audio_buffer_unmap (&dstabuf); if (inbuf != outbuf) gst_audio_buffer_unmap (&srcabuf); return ret; /* ERRORS */ convert_error: { GST_ELEMENT_ERROR (this, STREAM, FORMAT, (NULL), ("error while converting")); ret = GST_FLOW_ERROR; goto done; } inmap_error: { GST_ELEMENT_ERROR (this, STREAM, FORMAT, (NULL), ("failed to map input buffer")); return GST_FLOW_ERROR; } outmap_error: { GST_ELEMENT_ERROR (this, STREAM, FORMAT, (NULL), ("failed to map output buffer")); if (inbuf != outbuf) gst_audio_buffer_unmap (&srcabuf); return GST_FLOW_ERROR; } } static GstFlowReturn gst_audio_convert_transform_ip (GstBaseTransform * base, GstBuffer * buf) { return gst_audio_convert_transform (base, buf, buf); } static gboolean gst_audio_convert_transform_meta (GstBaseTransform * trans, GstBuffer * outbuf, GstMeta * meta, GstBuffer * inbuf) { const GstMetaInfo *info = meta->info; const gchar *const *tags; tags = gst_meta_api_type_get_tags (info->api); if (!tags || (g_strv_length ((gchar **) tags) == 1 && gst_meta_api_type_has_tag (info->api, META_TAG_AUDIO))) return TRUE; return FALSE; } static GstFlowReturn gst_audio_convert_submit_input_buffer (GstBaseTransform * base, gboolean is_discont, GstBuffer * input) { GstAudioConvert *this = GST_AUDIO_CONVERT (base); if (base->segment.format == GST_FORMAT_TIME) { if (!GST_AUDIO_INFO_IS_VALID (&this->in_info)) { GST_WARNING_OBJECT (this, "Got buffer, but not negotiated yet!"); return GST_FLOW_NOT_NEGOTIATED; } input = gst_audio_buffer_clip (input, &base->segment, this->in_info.rate, this->in_info.bpf); if (!input) return GST_FLOW_OK; } return GST_BASE_TRANSFORM_CLASS (parent_class)->submit_input_buffer (base, is_discont, input); } static GstFlowReturn gst_audio_convert_prepare_output_buffer (GstBaseTransform * base, GstBuffer * inbuf, GstBuffer ** outbuf) { GstAudioConvert *this = GST_AUDIO_CONVERT (base); GstAudioMeta *meta; GstFlowReturn ret; ret = GST_BASE_TRANSFORM_CLASS (parent_class)->prepare_output_buffer (base, inbuf, outbuf); if (ret != GST_FLOW_OK) return ret; meta = gst_buffer_get_audio_meta (inbuf); if (inbuf != *outbuf) { gsize samples = meta ? meta->samples : (gst_buffer_get_size (inbuf) / this->in_info.bpf); /* ensure that the output buffer is not bigger than what we need */ gst_buffer_resize (*outbuf, 0, samples * this->out_info.bpf); /* add the audio meta on the output buffer if it's planar */ if (this->out_info.layout == GST_AUDIO_LAYOUT_NON_INTERLEAVED) { gst_buffer_add_audio_meta (*outbuf, &this->out_info, samples, NULL); } } else { /* if the input buffer came with a GstAudioMeta, * update it to reflect the properties of the output format */ if (meta) meta->info = this->out_info; } return ret; } static void gst_audio_convert_set_mix_matrix (GstAudioConvert * this, const GValue * value) { gboolean mix_matrix_was_set; GstAudioConverter *old_converter; GValue old_mix_matrix; gboolean restore = FALSE; g_value_init (&old_mix_matrix, GST_TYPE_ARRAY); GST_OBJECT_LOCK (this); mix_matrix_was_set = this->mix_matrix_is_set; old_converter = this->convert; if (mix_matrix_was_set) { g_value_copy (&this->mix_matrix, &old_mix_matrix); } if (this->convert) { this->convert = NULL; } if (!gst_value_array_get_size (value)) { g_value_copy (value, &this->mix_matrix); this->mix_matrix_is_set = TRUE; } else { const GValue *first_row = gst_value_array_get_value (value, 0); if (gst_value_array_get_size (first_row)) { g_value_copy (value, &this->mix_matrix); this->mix_matrix_is_set = TRUE; } else { g_warning ("Empty mix matrix's first row."); restore = TRUE; goto done; } } GST_OBJECT_UNLOCK (this); /* We need to call this here already because gst_audio_convert_transform * might never get called otherwise if the element was set to passthrough. * * In any case if this succeeds we still want to reconfigure the sink to give * upstream a chance to renegotiate channels. */ if (gst_audio_convert_ensure_converter (GST_BASE_TRANSFORM (this), &this->in_info, &this->out_info)) { gst_base_transform_reconfigure_sink (GST_BASE_TRANSFORM (this)); } else { g_warning ("Cannot build converter with this mix matrix"); restore = TRUE; goto done; } done: if (restore) { this->mix_matrix_is_set = mix_matrix_was_set; if (mix_matrix_was_set) { g_value_copy (&old_mix_matrix, &this->mix_matrix); } this->convert = old_converter; } else if (old_converter) { gst_audio_converter_free (old_converter); } } static void gst_audio_convert_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstAudioConvert *this = GST_AUDIO_CONVERT (object); switch (prop_id) { case PROP_DITHERING: this->dither = g_value_get_enum (value); break; case PROP_NOISE_SHAPING: this->ns = g_value_get_enum (value); break; case PROP_DITHERING_THRESHOLD: this->dither_threshold = g_value_get_uint (value); break; case PROP_MIX_MATRIX: gst_audio_convert_set_mix_matrix (this, value); break; case PROP_INPUT_CHANNELS_REORDER: this->input_channels_reorder = g_value_get_enum (value); break; case PROP_INPUT_CHANNELS_REORDER_MODE: this->input_channels_reorder_mode = g_value_get_enum (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_audio_convert_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstAudioConvert *this = GST_AUDIO_CONVERT (object); switch (prop_id) { case PROP_DITHERING: g_value_set_enum (value, this->dither); break; case PROP_NOISE_SHAPING: g_value_set_enum (value, this->ns); break; case PROP_DITHERING_THRESHOLD: g_value_set_uint (value, this->dither_threshold); break; case PROP_MIX_MATRIX: GST_OBJECT_LOCK (object); if (this->mix_matrix_is_set) g_value_copy (&this->mix_matrix, value); GST_OBJECT_UNLOCK (object); break; case PROP_INPUT_CHANNELS_REORDER: g_value_set_enum (value, this->input_channels_reorder); break; case PROP_INPUT_CHANNELS_REORDER_MODE: g_value_set_enum (value, this->input_channels_reorder_mode); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } }