/* GStreamer * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> * Copyright (C) <2004> Wim Taymans <wim@fluendo.com> * Copyright (C) <2005> Thomas Vander Stichele <thomas at apestaart dot org> * Copyright (C) <2008> Sebastian Dröge <sebastian.droege@collabora.co.uk> * * 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. */ /* * Based on the lame element. */ /** * SECTION:element-twolame * @see_also: mad, lame * * This element encodes raw integer audio into an MPEG-1 layer 2 (MP2) stream. * * ## Example pipelines * * |[ * gst-launch-1.0 -v audiotestsrc wave=sine num-buffers=100 ! audioconvert ! twolame ! filesink location=sine.mp2 * ]| Encode a test sine signal to MP2. * |[ * gst-launch-1.0 -v alsasrc ! audioconvert ! twolame bitrate=192 ! filesink location=alsasrc.mp2 * ]| Record from a sound card using ALSA and encode to MP2 * |[ * gst-launch-1.0 -v filesrc location=music.wav ! decodebin ! audioconvert ! audioresample ! twolame bitrate=192 ! id3v2mux ! filesink location=music.mp2 * ]| Transcode from a .wav file to MP2 (the id3v2mux element is optional) * |[ * gst-launch-1.0 -v cdda://5 ! audioconvert ! twolame bitrate=192 ! filesink location=track5.mp2 * ]| Encode Audio CD track 5 to MP2 * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "string.h" #include "gsttwolamemp2enc.h" #include "gst/gst-i18n-plugin.h" GST_DEBUG_CATEGORY_STATIC (debug); #define GST_CAT_DEFAULT debug /* TwoLAME can do MPEG-1, MPEG-2 so it has 6 possible * sample rates it supports */ static GstStaticPadTemplate gst_two_lame_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-raw, " "format = (string) { " GST_AUDIO_NE (F32) ", " GST_AUDIO_NE (S16) " }, " "layout = (string) interleaved, " "rate = (int) { 16000, 22050, 24000, 32000, 44100, 48000 }, " "channels = (int) 1; " "audio/x-raw, " "format = (string) { " GST_AUDIO_NE (F32) ", " GST_AUDIO_NE (S16) " }, " "layout = (string) interleaved, " "rate = (int) { 16000, 22050, 24000, 32000, 44100, 48000 }, " "channels = (int) 2," "channel-mask = (bitmask) 0x3") ); static GstStaticPadTemplate gst_two_lame_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/mpeg, " "mpegversion = (int) 1, " "layer = (int) 2, " "rate = (int) { 16000, 22050, 24000, 32000, 44100, 48000 }, " "channels = (int) [ 1, 2 ]") ); static struct { gint mode; gint psymodel; gint bitrate; gint padding; gboolean energy_level_extension; gint emphasis; gboolean error_protection; gboolean copyright; gboolean original; gboolean vbr; gfloat vbr_level; gfloat ath_level; gint vbr_max_bitrate; gboolean quick_mode; gint quick_mode_count; } gst_two_lame_default_settings; /********** Define useful types for non-programmatic interfaces **********/ #define GST_TYPE_TWO_LAME_MODE (gst_two_lame_mode_get_type()) static GType gst_two_lame_mode_get_type (void) { static GType two_lame_mode_type = 0; static const GEnumValue two_lame_modes[] = { {TWOLAME_AUTO_MODE, "Auto", "auto"}, {TWOLAME_STEREO, "Stereo", "stereo"}, {TWOLAME_JOINT_STEREO, "Joint Stereo", "joint"}, {TWOLAME_DUAL_CHANNEL, "Dual Channel", "dual"}, {TWOLAME_MONO, "Mono", "mono"}, {0, NULL, NULL} }; if (!two_lame_mode_type) { two_lame_mode_type = g_enum_register_static ("GstTwoLameMode", two_lame_modes); } return two_lame_mode_type; } #define GST_TYPE_TWO_LAME_PADDING (gst_two_lame_padding_get_type()) static GType gst_two_lame_padding_get_type (void) { static GType two_lame_padding_type = 0; static const GEnumValue two_lame_padding[] = { {TWOLAME_PAD_NO, "No Padding", "never"}, {TWOLAME_PAD_ALL, "Always Pad", "always"}, {0, NULL, NULL} }; if (!two_lame_padding_type) { two_lame_padding_type = g_enum_register_static ("GstTwoLamePadding", two_lame_padding); } return two_lame_padding_type; } #define GST_TYPE_TWO_LAME_EMPHASIS (gst_two_lame_emphasis_get_type()) static GType gst_two_lame_emphasis_get_type (void) { static GType two_lame_emphasis_type = 0; static const GEnumValue two_lame_emphasis[] = { {TWOLAME_EMPHASIS_N, "No emphasis", "none"}, {TWOLAME_EMPHASIS_5, "50/15 ms", "5"}, {TWOLAME_EMPHASIS_C, "CCIT J.17", "ccit"}, {0, NULL, NULL} }; if (!two_lame_emphasis_type) { two_lame_emphasis_type = g_enum_register_static ("GstTwoLameEmphasis", two_lame_emphasis); } return two_lame_emphasis_type; } /********** Standard stuff for signals and arguments **********/ enum { ARG_0, ARG_MODE, ARG_PSYMODEL, ARG_BITRATE, ARG_PADDING, ARG_ENERGY_LEVEL_EXTENSION, ARG_EMPHASIS, ARG_ERROR_PROTECTION, ARG_COPYRIGHT, ARG_ORIGINAL, ARG_VBR, ARG_VBR_LEVEL, ARG_ATH_LEVEL, ARG_VBR_MAX_BITRATE, ARG_QUICK_MODE, ARG_QUICK_MODE_COUNT }; static gboolean gst_two_lame_start (GstAudioEncoder * enc); static gboolean gst_two_lame_stop (GstAudioEncoder * enc); static gboolean gst_two_lame_set_format (GstAudioEncoder * enc, GstAudioInfo * info); static GstFlowReturn gst_two_lame_handle_frame (GstAudioEncoder * enc, GstBuffer * in_buf); static void gst_two_lame_flush (GstAudioEncoder * enc); static void gst_two_lame_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_two_lame_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static gboolean gst_two_lame_setup (GstTwoLame * twolame); static gboolean two_lame_element_init (void); G_DEFINE_TYPE (GstTwoLame, gst_two_lame, GST_TYPE_AUDIO_ENCODER); GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (twolamemp2enc, "twolamemp2enc", GST_RANK_PRIMARY, GST_TYPE_TWO_LAME, two_lame_element_init ();); static void gst_two_lame_release_memory (GstTwoLame * twolame) { if (twolame->glopts) { twolame_close (&twolame->glopts); twolame->glopts = NULL; } } static void gst_two_lame_finalize (GObject * obj) { gst_two_lame_release_memory (GST_TWO_LAME (obj)); G_OBJECT_CLASS (gst_two_lame_parent_class)->finalize (obj); } static void gst_two_lame_class_init (GstTwoLameClass * klass) { GObjectClass *gobject_class; GstAudioEncoderClass *gstbase_class; gobject_class = (GObjectClass *) klass; gstbase_class = (GstAudioEncoderClass *) klass; gobject_class->set_property = gst_two_lame_set_property; gobject_class->get_property = gst_two_lame_get_property; gobject_class->finalize = gst_two_lame_finalize; gstbase_class->start = GST_DEBUG_FUNCPTR (gst_two_lame_start); gstbase_class->stop = GST_DEBUG_FUNCPTR (gst_two_lame_stop); gstbase_class->set_format = GST_DEBUG_FUNCPTR (gst_two_lame_set_format); gstbase_class->handle_frame = GST_DEBUG_FUNCPTR (gst_two_lame_handle_frame); gstbase_class->flush = GST_DEBUG_FUNCPTR (gst_two_lame_flush); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MODE, g_param_spec_enum ("mode", "Mode", "Encoding mode", GST_TYPE_TWO_LAME_MODE, gst_two_lame_default_settings.mode, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PSYMODEL, g_param_spec_int ("psymodel", "Psychoacoustic Model", "Psychoacoustic model used to encode the audio", -1, 4, gst_two_lame_default_settings.psymodel, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BITRATE, g_param_spec_int ("bitrate", "Bitrate (kb/s)", "Bitrate in kbit/sec (8, 16, 24, 32, 40, 48, 56, 64, 80, 96, " "112, 128, 144, 160, 192, 224, 256, 320, 384)", 8, 384, gst_two_lame_default_settings.bitrate, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PADDING, g_param_spec_enum ("padding", "Padding", "Padding type", GST_TYPE_TWO_LAME_PADDING, gst_two_lame_default_settings.padding, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ENERGY_LEVEL_EXTENSION, g_param_spec_boolean ("energy-level-extension", "Energy Level Extension", "Write peak PCM level to each frame", gst_two_lame_default_settings.energy_level_extension, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_EMPHASIS, g_param_spec_enum ("emphasis", "Emphasis", "Pre-emphasis to apply to the decoded audio", GST_TYPE_TWO_LAME_EMPHASIS, gst_two_lame_default_settings.emphasis, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ERROR_PROTECTION, g_param_spec_boolean ("error-protection", "Error protection", "Adds checksum to every frame", gst_two_lame_default_settings.error_protection, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_COPYRIGHT, g_param_spec_boolean ("copyright", "Copyright", "Mark as copyright", gst_two_lame_default_settings.copyright, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ORIGINAL, g_param_spec_boolean ("original", "Original", "Mark as original", gst_two_lame_default_settings.original, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_VBR, g_param_spec_boolean ("vbr", "VBR", "Enable variable bitrate mode", gst_two_lame_default_settings.vbr, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_VBR_LEVEL, g_param_spec_float ("vbr-level", "VBR Level", "VBR Level", -10.0, 10.0, gst_two_lame_default_settings.vbr_level, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ATH_LEVEL, g_param_spec_float ("ath-level", "ATH Level", "ATH Level in dB", -G_MAXFLOAT, G_MAXFLOAT, gst_two_lame_default_settings.ath_level, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_VBR_MAX_BITRATE, g_param_spec_int ("vbr-max-bitrate", "VBR max bitrate", "Specify maximum VBR bitrate (0=off, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, " "112, 128, 144, 160, 192, 224, 256, 320, 384)", 0, 384, gst_two_lame_default_settings.vbr_max_bitrate, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QUICK_MODE, g_param_spec_boolean ("quick-mode", "Quick mode", "Calculate Psymodel every frames", gst_two_lame_default_settings.quick_mode, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QUICK_MODE_COUNT, g_param_spec_int ("quick-mode-count", "Quick mode count", "Calculate Psymodel every n frames", 0, G_MAXINT, gst_two_lame_default_settings.quick_mode_count, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass), &gst_two_lame_src_template); gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass), &gst_two_lame_sink_template); gst_element_class_set_static_metadata (GST_ELEMENT_CLASS (klass), "TwoLAME mp2 encoder", "Codec/Encoder/Audio", "High-quality free MP2 encoder", "Sebastian Dröge <sebastian.droege@collabora.co.uk>"); gst_type_mark_as_plugin_api (GST_TYPE_TWO_LAME_MODE, 0); gst_type_mark_as_plugin_api (GST_TYPE_TWO_LAME_PADDING, 0); gst_type_mark_as_plugin_api (GST_TYPE_TWO_LAME_EMPHASIS, 0); } static gboolean gst_two_lame_set_format (GstAudioEncoder * enc, GstAudioInfo * info) { GstTwoLame *twolame; gint out_samplerate; gint version; GstCaps *othercaps; twolame = GST_TWO_LAME (enc); /* parameters already parsed for us */ twolame->samplerate = GST_AUDIO_INFO_RATE (info); twolame->num_channels = GST_AUDIO_INFO_CHANNELS (info); twolame->float_input = !GST_AUDIO_INFO_IS_INTEGER (info); /* but we might be asked to reconfigure, so reset */ gst_two_lame_release_memory (twolame); GST_DEBUG_OBJECT (twolame, "setting up twolame"); if (!gst_two_lame_setup (twolame)) goto setup_failed; out_samplerate = twolame_get_out_samplerate (twolame->glopts); if (out_samplerate == 0) goto zero_output_rate; if (out_samplerate != twolame->samplerate) { GST_WARNING_OBJECT (twolame, "output samplerate %d is different from incoming samplerate %d", out_samplerate, twolame->samplerate); } version = twolame_get_version (twolame->glopts); if (version == TWOLAME_MPEG2) version = 2; else version = 1; othercaps = gst_caps_new_simple ("audio/mpeg", "mpegversion", G_TYPE_INT, 1, "mpegaudioversion", G_TYPE_INT, version, "layer", G_TYPE_INT, 2, "channels", G_TYPE_INT, twolame->mode == TWOLAME_MONO ? 1 : twolame->num_channels, "rate", G_TYPE_INT, out_samplerate, NULL); /* and use these caps */ gst_audio_encoder_set_output_format (GST_AUDIO_ENCODER (twolame), othercaps); gst_caps_unref (othercaps); /* report needs to base class: * hand one frame at a time, if we are pretty sure what a frame is */ if (out_samplerate == twolame->samplerate) { gst_audio_encoder_set_frame_samples_min (enc, 1152); gst_audio_encoder_set_frame_samples_max (enc, 1152); gst_audio_encoder_set_frame_max (enc, 1); } return TRUE; zero_output_rate: { GST_ELEMENT_ERROR (twolame, LIBRARY, SETTINGS, (NULL), ("TwoLAME decided on a zero sample rate")); return FALSE; } setup_failed: { GST_ELEMENT_ERROR (twolame, LIBRARY, SETTINGS, (_("Failed to configure TwoLAME encoder. Check your encoding parameters.")), (NULL)); return FALSE; } } static void gst_two_lame_init (GstTwoLame * twolame) { GST_DEBUG_OBJECT (twolame, "starting initialization"); GST_PAD_SET_ACCEPT_TEMPLATE (GST_AUDIO_ENCODER_SINK_PAD (twolame)); twolame->mode = gst_two_lame_default_settings.mode; twolame->psymodel = gst_two_lame_default_settings.psymodel; twolame->bitrate = gst_two_lame_default_settings.bitrate; twolame->padding = gst_two_lame_default_settings.padding; twolame->energy_level_extension = gst_two_lame_default_settings.energy_level_extension; twolame->emphasis = gst_two_lame_default_settings.emphasis; twolame->error_protection = gst_two_lame_default_settings.error_protection; twolame->copyright = gst_two_lame_default_settings.copyright; twolame->original = gst_two_lame_default_settings.original; twolame->vbr = gst_two_lame_default_settings.vbr; twolame->vbr_level = gst_two_lame_default_settings.vbr_level; twolame->ath_level = gst_two_lame_default_settings.ath_level; twolame->vbr_max_bitrate = gst_two_lame_default_settings.vbr_max_bitrate; twolame->quick_mode = gst_two_lame_default_settings.quick_mode; twolame->quick_mode_count = gst_two_lame_default_settings.quick_mode_count; GST_DEBUG_OBJECT (twolame, "done initializing"); } static gboolean gst_two_lame_start (GstAudioEncoder * enc) { GstTwoLame *twolame = GST_TWO_LAME (enc); GST_DEBUG_OBJECT (twolame, "start"); return TRUE; } static gboolean gst_two_lame_stop (GstAudioEncoder * enc) { GstTwoLame *twolame = GST_TWO_LAME (enc); GST_DEBUG_OBJECT (twolame, "stop"); gst_two_lame_release_memory (twolame); return TRUE; } /* <php-emulation-mode>three underscores for ___rate is really really really * private as opposed to one underscore<php-emulation-mode> */ /* call this MACRO outside of the NULL state so that we have a higher chance * of actually having a pipeline and bus to get the message through */ #define CHECK_AND_FIXUP_BITRATE(obj,param,rate) \ G_STMT_START { \ gint ___rate = rate; \ gint maxrate = 320; \ gint multiplier = 64; \ if (rate <= 64) { \ maxrate = 64; multiplier = 8; \ if ((rate % 8) != 0) ___rate = GST_ROUND_UP_8 (rate); \ } else if (rate <= 144) { \ maxrate = 144; multiplier = 16; \ if ((rate % 16) != 0) ___rate = GST_ROUND_UP_16 (rate); \ } else if (rate <= 256) { \ maxrate = 256; multiplier = 32; \ if ((rate % 32) != 0) ___rate = GST_ROUND_UP_32 (rate); \ } else if (rate <= 384) { \ maxrate = 384; multiplier = 64; \ if ((rate % 64) != 0) ___rate = GST_ROUND_UP_64 (rate); \ } \ if (___rate != rate) { \ GST_ELEMENT_WARNING (obj, LIBRARY, SETTINGS, \ (_("The requested bitrate %d kbit/s for property '%s' " \ "is not allowed. " \ "The bitrate was changed to %d kbit/s."), rate, \ param, ___rate), \ ("A bitrate below %d should be a multiple of %d.", \ maxrate, multiplier)); \ rate = ___rate; \ } \ } G_STMT_END static void gst_two_lame_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstTwoLame *twolame = GST_TWO_LAME (object); switch (prop_id) { case ARG_MODE: twolame->mode = g_value_get_enum (value); break; case ARG_PSYMODEL: twolame->psymodel = g_value_get_int (value); break; case ARG_BITRATE: twolame->bitrate = g_value_get_int (value); break; case ARG_PADDING: twolame->padding = g_value_get_enum (value); break; case ARG_ENERGY_LEVEL_EXTENSION: twolame->energy_level_extension = g_value_get_boolean (value); break; case ARG_EMPHASIS: twolame->emphasis = g_value_get_enum (value); break; case ARG_ERROR_PROTECTION: twolame->error_protection = g_value_get_boolean (value); break; case ARG_COPYRIGHT: twolame->copyright = g_value_get_boolean (value); break; case ARG_ORIGINAL: twolame->original = g_value_get_boolean (value); break; case ARG_VBR: twolame->vbr = g_value_get_boolean (value); break; case ARG_VBR_LEVEL: twolame->vbr_level = g_value_get_float (value); break; case ARG_ATH_LEVEL: twolame->ath_level = g_value_get_float (value); break; case ARG_VBR_MAX_BITRATE: twolame->vbr_max_bitrate = g_value_get_int (value); break; case ARG_QUICK_MODE: twolame->quick_mode = g_value_get_boolean (value); break; case ARG_QUICK_MODE_COUNT: twolame->quick_mode_count = g_value_get_int (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_two_lame_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstTwoLame *twolame = GST_TWO_LAME (object); switch (prop_id) { case ARG_MODE: g_value_set_enum (value, twolame->mode); break; case ARG_PSYMODEL: g_value_set_int (value, twolame->psymodel); break; case ARG_BITRATE: g_value_set_int (value, twolame->bitrate); break; case ARG_PADDING: g_value_set_enum (value, twolame->padding); break; case ARG_ENERGY_LEVEL_EXTENSION: g_value_set_boolean (value, twolame->energy_level_extension); break; case ARG_EMPHASIS: g_value_set_enum (value, twolame->emphasis); break; case ARG_ERROR_PROTECTION: g_value_set_boolean (value, twolame->error_protection); break; case ARG_COPYRIGHT: g_value_set_boolean (value, twolame->copyright); break; case ARG_ORIGINAL: g_value_set_boolean (value, twolame->original); break; case ARG_VBR: g_value_set_boolean (value, twolame->vbr); break; case ARG_VBR_LEVEL: g_value_set_float (value, twolame->vbr_level); break; case ARG_ATH_LEVEL: g_value_set_float (value, twolame->ath_level); break; case ARG_VBR_MAX_BITRATE: g_value_set_int (value, twolame->vbr_max_bitrate); break; case ARG_QUICK_MODE: g_value_set_boolean (value, twolame->quick_mode); break; case ARG_QUICK_MODE_COUNT: g_value_set_int (value, twolame->quick_mode_count); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static GstFlowReturn gst_two_lame_flush_full (GstTwoLame * lame, gboolean push) { GstBuffer *buf; GstMapInfo map; gint size; GstFlowReturn result = GST_FLOW_OK; if (!lame->glopts) return GST_FLOW_OK; buf = gst_buffer_new_and_alloc (16384); gst_buffer_map (buf, &map, GST_MAP_WRITE); size = twolame_encode_flush (lame->glopts, map.data, 16384); gst_buffer_unmap (buf, &map); if (size > 0 && push) { gst_buffer_set_size (buf, size); GST_DEBUG_OBJECT (lame, "pushing final packet of %u bytes", size); result = gst_audio_encoder_finish_frame (GST_AUDIO_ENCODER (lame), buf, -1); } else { GST_DEBUG_OBJECT (lame, "no final packet (size=%d, push=%d)", size, push); gst_buffer_unref (buf); result = GST_FLOW_OK; } return result; } static void gst_two_lame_flush (GstAudioEncoder * enc) { gst_two_lame_flush_full (GST_TWO_LAME (enc), FALSE); } static GstFlowReturn gst_two_lame_handle_frame (GstAudioEncoder * enc, GstBuffer * buf) { GstTwoLame *twolame; gint mp3_buffer_size, mp3_size; GstBuffer *mp3_buf; GstFlowReturn result; gint num_samples; GstMapInfo map, mp3_map; twolame = GST_TWO_LAME (enc); /* squeeze remaining and push */ if (G_UNLIKELY (buf == NULL)) return gst_two_lame_flush_full (twolame, TRUE); gst_buffer_map (buf, &map, GST_MAP_READ); if (twolame->float_input) num_samples = map.size / 4; else num_samples = map.size / 2; /* allocate space for output */ mp3_buffer_size = 1.25 * num_samples + 16384; mp3_buf = gst_buffer_new_and_alloc (mp3_buffer_size); gst_buffer_map (mp3_buf, &mp3_map, GST_MAP_WRITE); if (twolame->num_channels == 1) { if (twolame->float_input) mp3_size = twolame_encode_buffer_float32 (twolame->glopts, (float *) map.data, (float *) map.data, num_samples, mp3_map.data, mp3_buffer_size); else mp3_size = twolame_encode_buffer (twolame->glopts, (short int *) map.data, (short int *) map.data, num_samples, mp3_map.data, mp3_buffer_size); } else { if (twolame->float_input) mp3_size = twolame_encode_buffer_float32_interleaved (twolame->glopts, (float *) map.data, num_samples / twolame->num_channels, mp3_map.data, mp3_buffer_size); else mp3_size = twolame_encode_buffer_interleaved (twolame->glopts, (short int *) map.data, num_samples / twolame->num_channels, mp3_map.data, mp3_buffer_size); } GST_LOG_OBJECT (twolame, "encoded %" G_GSIZE_FORMAT " bytes of audio " "to %d bytes of mp3", map.size, mp3_size); gst_buffer_unmap (buf, &map); gst_buffer_unmap (mp3_buf, &mp3_map); if (mp3_size > 0) { gst_buffer_set_size (mp3_buf, mp3_size); result = gst_audio_encoder_finish_frame (enc, mp3_buf, -1); } else { if (mp3_size < 0) { /* eat error ? */ g_warning ("error %d", mp3_size); } gst_buffer_unref (mp3_buf); result = GST_FLOW_OK; } return result; } /* set up the encoder state */ static gboolean gst_two_lame_setup (GstTwoLame * twolame) { #define CHECK_ERROR(command) G_STMT_START {\ if ((command) < 0) { \ GST_ERROR_OBJECT (twolame, "setup failed: " G_STRINGIFY (command)); \ return FALSE; \ } \ }G_STMT_END int retval; GstCaps *allowed_caps; GST_DEBUG_OBJECT (twolame, "starting setup"); /* check if we're already setup; if we are, we might want to check * if this initialization is compatible with the previous one */ /* FIXME: do this */ if (twolame->setup) { GST_WARNING_OBJECT (twolame, "already setup"); twolame->setup = FALSE; } twolame->glopts = twolame_init (); if (twolame->glopts == NULL) return FALSE; /* copy the parameters over */ twolame_set_in_samplerate (twolame->glopts, twolame->samplerate); /* let twolame choose default samplerate unless outgoing sample rate is fixed */ allowed_caps = gst_pad_get_allowed_caps (GST_AUDIO_ENCODER_SRC_PAD (twolame)); if (allowed_caps != NULL) { GstStructure *structure; gint samplerate; structure = gst_caps_get_structure (allowed_caps, 0); if (gst_structure_get_int (structure, "rate", &samplerate)) { GST_DEBUG_OBJECT (twolame, "Setting sample rate to %d as fixed in src caps", samplerate); twolame_set_out_samplerate (twolame->glopts, samplerate); } else { GST_DEBUG_OBJECT (twolame, "Letting twolame choose sample rate"); twolame_set_out_samplerate (twolame->glopts, 0); } gst_caps_unref (allowed_caps); allowed_caps = NULL; } else { GST_DEBUG_OBJECT (twolame, "No peer yet, letting twolame choose sample rate"); twolame_set_out_samplerate (twolame->glopts, 0); } /* force mono encoding if we only have one channel */ if (twolame->num_channels == 1) twolame->mode = 3; /* Fix bitrates and MPEG version */ CHECK_ERROR (twolame_set_num_channels (twolame->glopts, twolame->num_channels)); CHECK_ERROR (twolame_set_mode (twolame->glopts, twolame->mode)); CHECK_ERROR (twolame_set_psymodel (twolame->glopts, twolame->psymodel)); CHECK_AND_FIXUP_BITRATE (twolame, "bitrate", twolame->bitrate); CHECK_ERROR (twolame_set_bitrate (twolame->glopts, twolame->bitrate)); CHECK_ERROR (twolame_set_padding (twolame->glopts, twolame->padding)); CHECK_ERROR (twolame_set_energy_levels (twolame->glopts, twolame->energy_level_extension)); CHECK_ERROR (twolame_set_emphasis (twolame->glopts, twolame->emphasis)); CHECK_ERROR (twolame_set_error_protection (twolame->glopts, twolame->error_protection)); CHECK_ERROR (twolame_set_copyright (twolame->glopts, twolame->copyright)); CHECK_ERROR (twolame_set_original (twolame->glopts, twolame->original)); CHECK_ERROR (twolame_set_VBR (twolame->glopts, twolame->vbr)); CHECK_ERROR (twolame_set_VBR_level (twolame->glopts, twolame->vbr_level)); CHECK_ERROR (twolame_set_ATH_level (twolame->glopts, twolame->ath_level)); CHECK_AND_FIXUP_BITRATE (twolame, "vbr-max-bitrate", twolame->vbr_max_bitrate); CHECK_ERROR (twolame_set_VBR_max_bitrate_kbps (twolame->glopts, twolame->vbr_max_bitrate)); CHECK_ERROR (twolame_set_quick_mode (twolame->glopts, twolame->quick_mode)); CHECK_ERROR (twolame_set_quick_count (twolame->glopts, twolame->quick_mode_count)); /* initialize the twolame encoder */ if ((retval = twolame_init_params (twolame->glopts)) >= 0) { twolame->setup = TRUE; /* FIXME: it would be nice to print out the mode here */ GST_INFO ("twolame encoder setup (%d kbit/s, %d Hz, %d channels)", twolame->bitrate, twolame->samplerate, twolame->num_channels); } else { GST_ERROR_OBJECT (twolame, "twolame_init_params returned %d", retval); } GST_DEBUG_OBJECT (twolame, "done with setup"); return twolame->setup; #undef CHECK_ERROR } static gboolean gst_two_lame_get_default_settings (void) { twolame_options *glopts = NULL; glopts = twolame_init (); if (glopts == NULL) { GST_ERROR ("Couldn't initialize TwoLAME"); return FALSE; } twolame_set_num_channels (glopts, 2); twolame_set_in_samplerate (glopts, 44100); if (twolame_init_params (glopts) != 0) { GST_ERROR ("Couldn't set default parameters"); return FALSE; } gst_two_lame_default_settings.mode = TWOLAME_JOINT_STEREO; /* twolame_get_mode (glopts); */ gst_two_lame_default_settings.psymodel = twolame_get_psymodel (glopts); gst_two_lame_default_settings.bitrate = twolame_get_bitrate (glopts); gst_two_lame_default_settings.padding = twolame_get_padding (glopts); gst_two_lame_default_settings.energy_level_extension = twolame_get_energy_levels (glopts); gst_two_lame_default_settings.emphasis = twolame_get_emphasis (glopts); gst_two_lame_default_settings.error_protection = twolame_get_error_protection (glopts); gst_two_lame_default_settings.copyright = twolame_get_copyright (glopts); gst_two_lame_default_settings.original = twolame_get_original (glopts); gst_two_lame_default_settings.vbr = twolame_get_VBR (glopts); gst_two_lame_default_settings.vbr_level = twolame_get_VBR_level (glopts); gst_two_lame_default_settings.ath_level = twolame_get_ATH_level (glopts); gst_two_lame_default_settings.vbr_max_bitrate = twolame_get_VBR_max_bitrate_kbps (glopts); gst_two_lame_default_settings.quick_mode = twolame_get_quick_mode (glopts); gst_two_lame_default_settings.quick_mode_count = twolame_get_quick_count (glopts); twolame_close (&glopts); return TRUE; } static gboolean two_lame_element_init (void) { GST_DEBUG_CATEGORY_INIT (debug, "twolame", 0, "twolame mp2 encoder"); if (!gst_two_lame_get_default_settings ()) return FALSE; #ifdef ENABLE_NLS GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE, LOCALEDIR); bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR); bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8"); #endif /* ENABLE_NLS */ return TRUE; } static gboolean plugin_init (GstPlugin * plugin) { return GST_ELEMENT_REGISTER (twolamemp2enc, plugin); } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, twolame, "Encode MP2s with TwoLAME", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);