/* GStreamer * Copyright (C) <1999> Erik Walthinsen * * 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:element-flacenc * @see_also: #GstFlacDec * * flacenc encodes FLAC streams. * FLAC * is a Free Lossless Audio Codec. * * * Example launch line * |[ * gst-launch audiotestsrc num-buffers=100 ! flacenc ! filesink location=beep.flac * ]| * */ /* TODO: - We currently don't handle discontinuities in the stream in a useful * way and instead rely on the developer plugging in audiorate if * the stream contains discontinuities. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #include #include /* Taken from http://flac.sourceforge.net/format.html#frame_header */ static const GstAudioChannelPosition channel_positions[8][8] = { {GST_AUDIO_CHANNEL_POSITION_FRONT_MONO}, {GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT}, { GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER}, { GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT}, { GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT}, { GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT}, /* FIXME: 7/8 channel layouts are not defined in the FLAC specs */ { GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE, GST_AUDIO_CHANNEL_POSITION_REAR_CENTER}, { GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE, GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT, GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT} }; #define FLAC_SINK_CAPS \ "audio/x-raw-int, " \ "endianness = (int) BYTE_ORDER, " \ "signed = (boolean) TRUE, " \ "width = (int) 8, " \ "depth = (int) 8, " \ "rate = (int) [ 1, 655350 ], " \ "channels = (int) [ 1, 8 ]; " \ "audio/x-raw-int, " \ "endianness = (int) BYTE_ORDER, " \ "signed = (boolean) TRUE, " \ "width = (int) 16, " \ "depth = (int) { 12, 16 }, " \ "rate = (int) [ 1, 655350 ], " \ "channels = (int) [ 1, 8 ]; " \ "audio/x-raw-int, " \ "endianness = (int) BYTE_ORDER, " \ "signed = (boolean) TRUE, " \ "width = (int) 32, " \ "depth = (int) { 20, 24 }, " \ "rate = (int) [ 1, 655350 ], " \ "channels = (int) [ 1, 8 ]" static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-flac") ); static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS (FLAC_SINK_CAPS) ); enum { PROP_0, PROP_QUALITY, PROP_STREAMABLE_SUBSET, PROP_MID_SIDE_STEREO, PROP_LOOSE_MID_SIDE_STEREO, PROP_BLOCKSIZE, PROP_MAX_LPC_ORDER, PROP_QLP_COEFF_PRECISION, PROP_QLP_COEFF_PREC_SEARCH, PROP_ESCAPE_CODING, PROP_EXHAUSTIVE_MODEL_SEARCH, PROP_MIN_RESIDUAL_PARTITION_ORDER, PROP_MAX_RESIDUAL_PARTITION_ORDER, PROP_RICE_PARAMETER_SEARCH_DIST }; GST_DEBUG_CATEGORY_STATIC (flacenc_debug); #define GST_CAT_DEFAULT flacenc_debug #define _do_init(type) \ G_STMT_START{ \ static const GInterfaceInfo tag_setter_info = { \ NULL, \ NULL, \ NULL \ }; \ static const GInterfaceInfo preset_info = { \ NULL, \ NULL, \ NULL \ }; \ g_type_add_interface_static (type, GST_TYPE_TAG_SETTER, \ &tag_setter_info); \ g_type_add_interface_static (type, GST_TYPE_PRESET, \ &preset_info); \ }G_STMT_END GST_BOILERPLATE_FULL (GstFlacEnc, gst_flac_enc, GstElement, GST_TYPE_ELEMENT, _do_init); static void gst_flac_enc_finalize (GObject * object); static gboolean gst_flac_enc_sink_setcaps (GstPad * pad, GstCaps * caps); static GstCaps *gst_flac_enc_sink_getcaps (GstPad * pad); static gboolean gst_flac_enc_sink_event (GstPad * pad, GstEvent * event); static GstFlowReturn gst_flac_enc_chain (GstPad * pad, GstBuffer * buffer); static gboolean gst_flac_enc_update_quality (GstFlacEnc * flacenc, gint quality); static void gst_flac_enc_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_flac_enc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstStateChangeReturn gst_flac_enc_change_state (GstElement * element, GstStateChange transition); static FLAC__StreamEncoderWriteStatus gst_flac_enc_write_callback (const FLAC__StreamEncoder * encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, unsigned current_frame, void *client_data); static FLAC__StreamEncoderSeekStatus gst_flac_enc_seek_callback (const FLAC__StreamEncoder * encoder, FLAC__uint64 absolute_byte_offset, void *client_data); static FLAC__StreamEncoderTellStatus gst_flac_enc_tell_callback (const FLAC__StreamEncoder * encoder, FLAC__uint64 * absolute_byte_offset, void *client_data); typedef struct { gboolean exhaustive_model_search; gboolean escape_coding; gboolean mid_side; gboolean loose_mid_side; guint qlp_coeff_precision; gboolean qlp_coeff_prec_search; guint min_residual_partition_order; guint max_residual_partition_order; guint rice_parameter_search_dist; guint max_lpc_order; guint blocksize; } GstFlacEncParams; static const GstFlacEncParams flacenc_params[] = { {FALSE, FALSE, FALSE, FALSE, 0, FALSE, 2, 2, 0, 0, 1152}, {FALSE, FALSE, TRUE, TRUE, 0, FALSE, 2, 2, 0, 0, 1152}, {FALSE, FALSE, TRUE, FALSE, 0, FALSE, 0, 3, 0, 0, 1152}, {FALSE, FALSE, FALSE, FALSE, 0, FALSE, 3, 3, 0, 6, 4608}, {FALSE, FALSE, TRUE, TRUE, 0, FALSE, 3, 3, 0, 8, 4608}, {FALSE, FALSE, TRUE, FALSE, 0, FALSE, 3, 3, 0, 8, 4608}, {FALSE, FALSE, TRUE, FALSE, 0, FALSE, 0, 4, 0, 8, 4608}, {TRUE, FALSE, TRUE, FALSE, 0, FALSE, 0, 6, 0, 8, 4608}, {TRUE, FALSE, TRUE, FALSE, 0, FALSE, 0, 6, 0, 12, 4608}, {TRUE, TRUE, TRUE, FALSE, 0, FALSE, 0, 16, 0, 32, 4608}, }; #define DEFAULT_QUALITY 5 #define GST_TYPE_FLAC_ENC_QUALITY (gst_flac_enc_quality_get_type ()) GType gst_flac_enc_quality_get_type (void) { static GType qtype = 0; if (qtype == 0) { static const GEnumValue values[] = { {0, "0 - Fastest compression", "0"}, {1, "1", "1"}, {2, "2", "2"}, {3, "3", "3"}, {4, "4", "4"}, {5, "5 - Default", "5"}, {6, "6", "6"}, {7, "7", "7"}, {8, "8 - Highest compression", "8"}, {9, "9 - Insane", "9"}, {0, NULL, NULL} }; qtype = g_enum_register_static ("GstFlacEncQuality", values); } return qtype; } static void gst_flac_enc_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&src_factory)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&sink_factory)); gst_element_class_set_details_simple (element_class, "FLAC audio encoder", "Codec/Encoder/Audio", "Encodes audio with the FLAC lossless audio encoder", "Wim Taymans "); GST_DEBUG_CATEGORY_INIT (flacenc_debug, "flacenc", 0, "Flac encoding element"); } static void gst_flac_enc_class_init (GstFlacEncClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gobject_class->set_property = gst_flac_enc_set_property; gobject_class->get_property = gst_flac_enc_get_property; gobject_class->finalize = gst_flac_enc_finalize; g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_QUALITY, g_param_spec_enum ("quality", "Quality", "Speed versus compression tradeoff", GST_TYPE_FLAC_ENC_QUALITY, DEFAULT_QUALITY, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_STREAMABLE_SUBSET, g_param_spec_boolean ("streamable_subset", "Streamable subset", "true to limit encoder to generating a Subset stream, else false", TRUE, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MID_SIDE_STEREO, g_param_spec_boolean ("mid_side_stereo", "Do mid side stereo", "Do mid side stereo (only for stereo input)", flacenc_params[DEFAULT_QUALITY].mid_side, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_LOOSE_MID_SIDE_STEREO, g_param_spec_boolean ("loose_mid_side_stereo", "Loose mid side stereo", "Loose mid side stereo", flacenc_params[DEFAULT_QUALITY].loose_mid_side, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BLOCKSIZE, g_param_spec_uint ("blocksize", "Blocksize", "Blocksize in samples", FLAC__MIN_BLOCK_SIZE, FLAC__MAX_BLOCK_SIZE, flacenc_params[DEFAULT_QUALITY].blocksize, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MAX_LPC_ORDER, g_param_spec_uint ("max_lpc_order", "Max LPC order", "Max LPC order; 0 => use only fixed predictors", 0, FLAC__MAX_LPC_ORDER, flacenc_params[DEFAULT_QUALITY].max_lpc_order, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_QLP_COEFF_PRECISION, g_param_spec_uint ("qlp_coeff_precision", "QLP coefficients precision", "Precision in bits of quantized linear-predictor coefficients; 0 = automatic", 0, 32, flacenc_params[DEFAULT_QUALITY].qlp_coeff_precision, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_QLP_COEFF_PREC_SEARCH, g_param_spec_boolean ("qlp_coeff_prec_search", "Do QLP coefficients precision search", "false = use qlp_coeff_precision, " "true = search around qlp_coeff_precision, take best", flacenc_params[DEFAULT_QUALITY].qlp_coeff_prec_search, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ESCAPE_CODING, g_param_spec_boolean ("escape_coding", "Do Escape coding", "search for escape codes in the entropy coding stage " "for slightly better compression", flacenc_params[DEFAULT_QUALITY].escape_coding, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_EXHAUSTIVE_MODEL_SEARCH, g_param_spec_boolean ("exhaustive_model_search", "Do exhaustive model search", "do exhaustive search of LP coefficient quantization (expensive!)", flacenc_params[DEFAULT_QUALITY].exhaustive_model_search, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MIN_RESIDUAL_PARTITION_ORDER, g_param_spec_uint ("min_residual_partition_order", "Min residual partition order", "Min residual partition order (above 4 doesn't usually help much)", 0, 16, flacenc_params[DEFAULT_QUALITY].min_residual_partition_order, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MAX_RESIDUAL_PARTITION_ORDER, g_param_spec_uint ("max_residual_partition_order", "Max residual partition order", "Max residual partition order (above 4 doesn't usually help much)", 0, 16, flacenc_params[DEFAULT_QUALITY].max_residual_partition_order, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_RICE_PARAMETER_SEARCH_DIST, g_param_spec_uint ("rice_parameter_search_dist", "rice_parameter_search_dist", "0 = try only calc'd parameter k; else try all [k-dist..k+dist] " "parameters, use best", 0, FLAC__MAX_RICE_PARTITION_ORDER, flacenc_params[DEFAULT_QUALITY].rice_parameter_search_dist, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); gstelement_class->change_state = gst_flac_enc_change_state; } static void gst_flac_enc_init (GstFlacEnc * flacenc, GstFlacEncClass * klass) { flacenc->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink"); gst_pad_set_chain_function (flacenc->sinkpad, GST_DEBUG_FUNCPTR (gst_flac_enc_chain)); gst_pad_set_event_function (flacenc->sinkpad, GST_DEBUG_FUNCPTR (gst_flac_enc_sink_event)); gst_pad_set_getcaps_function (flacenc->sinkpad, GST_DEBUG_FUNCPTR (gst_flac_enc_sink_getcaps)); gst_pad_set_setcaps_function (flacenc->sinkpad, GST_DEBUG_FUNCPTR (gst_flac_enc_sink_setcaps)); gst_element_add_pad (GST_ELEMENT (flacenc), flacenc->sinkpad); flacenc->srcpad = gst_pad_new_from_static_template (&src_factory, "src"); gst_pad_use_fixed_caps (flacenc->srcpad); gst_element_add_pad (GST_ELEMENT (flacenc), flacenc->srcpad); flacenc->encoder = FLAC__stream_encoder_new (); flacenc->offset = 0; flacenc->samples_written = 0; flacenc->channels = 0; gst_flac_enc_update_quality (flacenc, DEFAULT_QUALITY); flacenc->tags = gst_tag_list_new (); flacenc->got_headers = FALSE; flacenc->headers = NULL; flacenc->last_flow = GST_FLOW_OK; } static void gst_flac_enc_finalize (GObject * object) { GstFlacEnc *flacenc = GST_FLAC_ENC (object); gst_tag_list_free (flacenc->tags); FLAC__stream_encoder_delete (flacenc->encoder); G_OBJECT_CLASS (parent_class)->finalize (object); } static void add_one_tag (const GstTagList * list, const gchar * tag, gpointer user_data) { GList *comments; GList *it; GstFlacEnc *flacenc = GST_FLAC_ENC (user_data); comments = gst_tag_to_vorbis_comments (list, tag); for (it = comments; it != NULL; it = it->next) { FLAC__StreamMetadata_VorbisComment_Entry commment_entry; commment_entry.length = strlen (it->data); commment_entry.entry = it->data; FLAC__metadata_object_vorbiscomment_insert_comment (flacenc->meta[0], flacenc->meta[0]->data.vorbis_comment.num_comments, commment_entry, TRUE); g_free (it->data); } g_list_free (comments); } static void gst_flac_enc_set_metadata (GstFlacEnc * flacenc) { const GstTagList *user_tags; GstTagList *copy; g_return_if_fail (flacenc != NULL); user_tags = gst_tag_setter_get_tag_list (GST_TAG_SETTER (flacenc)); if ((flacenc->tags == NULL) && (user_tags == NULL)) { return; } copy = gst_tag_list_merge (user_tags, flacenc->tags, gst_tag_setter_get_tag_merge_mode (GST_TAG_SETTER (flacenc))); flacenc->meta = g_malloc (sizeof (FLAC__StreamMetadata **)); flacenc->meta[0] = FLAC__metadata_object_new (FLAC__METADATA_TYPE_VORBIS_COMMENT); gst_tag_list_foreach (copy, add_one_tag, flacenc); if (FLAC__stream_encoder_set_metadata (flacenc->encoder, flacenc->meta, 1) != true) g_warning ("Dude, i'm already initialized!"); gst_tag_list_free (copy); } static void gst_flac_enc_caps_append_structure_with_widths (GstCaps * caps, GstStructure * s) { GstStructure *tmp; GValue list = { 0, }; GValue depth = { 0, }; tmp = gst_structure_copy (s); gst_structure_set (tmp, "width", G_TYPE_INT, 8, "depth", G_TYPE_INT, 8, NULL); gst_caps_append_structure (caps, tmp); tmp = gst_structure_copy (s); g_value_init (&depth, G_TYPE_INT); g_value_init (&list, GST_TYPE_LIST); g_value_set_int (&depth, 12); gst_value_list_append_value (&list, &depth); g_value_set_int (&depth, 16); gst_value_list_append_value (&list, &depth); gst_structure_set (tmp, "width", G_TYPE_INT, 16, NULL); gst_structure_set_value (tmp, "depth", &list); gst_caps_append_structure (caps, tmp); g_value_reset (&list); tmp = s; g_value_set_int (&depth, 20); gst_value_list_append_value (&list, &depth); g_value_set_int (&depth, 24); gst_value_list_append_value (&list, &depth); gst_structure_set (tmp, "width", G_TYPE_INT, 32, NULL); gst_structure_set_value (tmp, "depth", &list); gst_caps_append_structure (caps, tmp); g_value_unset (&list); g_value_unset (&depth); } static GstCaps * gst_flac_enc_sink_getcaps (GstPad * pad) { GstCaps *ret = NULL; GST_OBJECT_LOCK (pad); if (GST_PAD_CAPS (pad)) { ret = gst_caps_ref (GST_PAD_CAPS (pad)); } else { gint i, c; ret = gst_caps_new_empty (); gst_flac_enc_caps_append_structure_with_widths (ret, gst_structure_new ("audio/x-raw-int", "endianness", G_TYPE_INT, G_BYTE_ORDER, "signed", G_TYPE_BOOLEAN, TRUE, "rate", GST_TYPE_INT_RANGE, 1, 655350, "channels", GST_TYPE_INT_RANGE, 1, 2, NULL)); for (i = 3; i <= 8; i++) { GValue positions = { 0, }; GValue pos = { 0, }; GstStructure *s; g_value_init (&positions, GST_TYPE_ARRAY); g_value_init (&pos, GST_TYPE_AUDIO_CHANNEL_POSITION); for (c = 0; c < i; c++) { g_value_set_enum (&pos, channel_positions[i - 1][c]); gst_value_array_append_value (&positions, &pos); } g_value_unset (&pos); s = gst_structure_new ("audio/x-raw-int", "endianness", G_TYPE_INT, G_BYTE_ORDER, "signed", G_TYPE_BOOLEAN, TRUE, "rate", GST_TYPE_INT_RANGE, 1, 655350, "channels", G_TYPE_INT, i, NULL); gst_structure_set_value (s, "channel-positions", &positions); g_value_unset (&positions); gst_flac_enc_caps_append_structure_with_widths (ret, s); } } GST_OBJECT_UNLOCK (pad); GST_DEBUG_OBJECT (pad, "Return caps %" GST_PTR_FORMAT, ret); return ret; } static guint64 gst_flac_enc_query_peer_total_samples (GstFlacEnc * flacenc, GstPad * pad) { GstFormat fmt = GST_FORMAT_DEFAULT; gint64 duration; if (gst_pad_query_peer_duration (pad, &fmt, &duration) && fmt == GST_FORMAT_DEFAULT && duration != GST_CLOCK_TIME_NONE) goto done; fmt = GST_FORMAT_TIME; if (gst_pad_query_peer_duration (pad, &fmt, &duration) && fmt == GST_FORMAT_TIME && duration != GST_CLOCK_TIME_NONE) { duration = GST_FRAMES_TO_CLOCK_TIME (duration, flacenc->sample_rate); goto done; } GST_DEBUG_OBJECT (flacenc, "Upstream reported no total samples"); return GST_CLOCK_TIME_NONE; done: GST_DEBUG_OBJECT (flacenc, "Upstream reported %" G_GUINT64_FORMAT " total samples", duration); return duration; } static gboolean gst_flac_enc_sink_setcaps (GstPad * pad, GstCaps * caps) { GstFlacEnc *flacenc; GstStructure *structure; guint64 total_samples = GST_CLOCK_TIME_NONE; FLAC__StreamEncoderInitStatus init_status; gint depth, chans, rate, width; flacenc = GST_FLAC_ENC (gst_pad_get_parent (pad)); if (FLAC__stream_encoder_get_state (flacenc->encoder) != FLAC__STREAM_ENCODER_UNINITIALIZED) goto encoder_already_initialized; structure = gst_caps_get_structure (caps, 0); if (!gst_structure_get_int (structure, "channels", &chans) || !gst_structure_get_int (structure, "width", &width) || !gst_structure_get_int (structure, "depth", &depth) || !gst_structure_get_int (structure, "rate", &rate)) { GST_DEBUG_OBJECT (flacenc, "incomplete caps: %" GST_PTR_FORMAT, caps); return FALSE; } flacenc->channels = chans; flacenc->width = width; flacenc->depth = depth; flacenc->sample_rate = rate; caps = gst_caps_new_simple ("audio/x-flac", "channels", G_TYPE_INT, flacenc->channels, "rate", G_TYPE_INT, flacenc->sample_rate, NULL); if (!gst_pad_set_caps (flacenc->srcpad, caps)) goto setting_src_caps_failed; gst_caps_unref (caps); total_samples = gst_flac_enc_query_peer_total_samples (flacenc, pad); FLAC__stream_encoder_set_bits_per_sample (flacenc->encoder, flacenc->depth); FLAC__stream_encoder_set_sample_rate (flacenc->encoder, flacenc->sample_rate); FLAC__stream_encoder_set_channels (flacenc->encoder, flacenc->channels); if (total_samples != GST_CLOCK_TIME_NONE) FLAC__stream_encoder_set_total_samples_estimate (flacenc->encoder, total_samples); gst_flac_enc_set_metadata (flacenc); init_status = FLAC__stream_encoder_init_stream (flacenc->encoder, gst_flac_enc_write_callback, gst_flac_enc_seek_callback, gst_flac_enc_tell_callback, NULL, flacenc); if (init_status != FLAC__STREAM_ENCODER_INIT_STATUS_OK) goto failed_to_initialize; gst_object_unref (flacenc); return TRUE; encoder_already_initialized: { g_warning ("flac already initialized -- fixme allow this"); gst_object_unref (flacenc); return FALSE; } setting_src_caps_failed: { GST_DEBUG_OBJECT (flacenc, "Couldn't set caps on source pad: %" GST_PTR_FORMAT, caps); gst_caps_unref (caps); gst_object_unref (flacenc); return FALSE; } failed_to_initialize: { GST_ELEMENT_ERROR (flacenc, LIBRARY, INIT, (NULL), ("could not initialize encoder (wrong parameters?)")); gst_object_unref (flacenc); return FALSE; } } static gboolean gst_flac_enc_update_quality (GstFlacEnc * flacenc, gint quality) { flacenc->quality = quality; #define DO_UPDATE(name, val, str) \ G_STMT_START { \ if (FLAC__stream_encoder_get_##name (flacenc->encoder) != \ flacenc_params[quality].val) { \ FLAC__stream_encoder_set_##name (flacenc->encoder, \ flacenc_params[quality].val); \ g_object_notify (G_OBJECT (flacenc), str); \ } \ } G_STMT_END g_object_freeze_notify (G_OBJECT (flacenc)); if (flacenc->channels == 2 || flacenc->channels == 0) { DO_UPDATE (do_mid_side_stereo, mid_side, "mid_side_stereo"); DO_UPDATE (loose_mid_side_stereo, loose_mid_side, "loose_mid_side"); } DO_UPDATE (blocksize, blocksize, "blocksize"); DO_UPDATE (max_lpc_order, max_lpc_order, "max_lpc_order"); DO_UPDATE (qlp_coeff_precision, qlp_coeff_precision, "qlp_coeff_precision"); DO_UPDATE (do_qlp_coeff_prec_search, qlp_coeff_prec_search, "qlp_coeff_prec_search"); DO_UPDATE (do_escape_coding, escape_coding, "escape_coding"); DO_UPDATE (do_exhaustive_model_search, exhaustive_model_search, "exhaustive_model_search"); DO_UPDATE (min_residual_partition_order, min_residual_partition_order, "min_residual_partition_order"); DO_UPDATE (max_residual_partition_order, max_residual_partition_order, "max_residual_partition_order"); DO_UPDATE (rice_parameter_search_dist, rice_parameter_search_dist, "rice_parameter_search_dist"); #undef DO_UPDATE g_object_thaw_notify (G_OBJECT (flacenc)); return TRUE; } static FLAC__StreamEncoderSeekStatus gst_flac_enc_seek_callback (const FLAC__StreamEncoder * encoder, FLAC__uint64 absolute_byte_offset, void *client_data) { GstFlacEnc *flacenc; GstEvent *event; GstPad *peerpad; flacenc = GST_FLAC_ENC (client_data); if (flacenc->stopped) return FLAC__STREAM_ENCODER_SEEK_STATUS_OK; event = gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_BYTES, absolute_byte_offset, GST_BUFFER_OFFSET_NONE, 0); if ((peerpad = gst_pad_get_peer (flacenc->srcpad))) { gboolean ret = gst_pad_send_event (peerpad, event); gst_object_unref (peerpad); if (ret) { GST_DEBUG ("Seek to %" G_GUINT64_FORMAT " %s", absolute_byte_offset, "succeeded"); } else { GST_DEBUG ("Seek to %" G_GUINT64_FORMAT " %s", absolute_byte_offset, "failed"); return FLAC__STREAM_ENCODER_SEEK_STATUS_UNSUPPORTED; } } else { GST_DEBUG ("Seek to %" G_GUINT64_FORMAT " failed (no peer pad)", absolute_byte_offset); } flacenc->offset = absolute_byte_offset; return FLAC__STREAM_ENCODER_SEEK_STATUS_OK; } static void notgst_value_array_append_buffer (GValue * array_val, GstBuffer * buf) { GValue value = { 0, }; g_value_init (&value, GST_TYPE_BUFFER); /* copy buffer to avoid problems with circular refcounts */ buf = gst_buffer_copy (buf); /* again, for good measure */ GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_IN_CAPS); gst_value_set_buffer (&value, buf); gst_buffer_unref (buf); gst_value_array_append_value (array_val, &value); g_value_unset (&value); } #define HDR_TYPE_STREAMINFO 0 #define HDR_TYPE_VORBISCOMMENT 4 static void gst_flac_enc_process_stream_headers (GstFlacEnc * enc) { GstBuffer *vorbiscomment = NULL; GstBuffer *streaminfo = NULL; GstBuffer *marker = NULL; GValue array = { 0, }; GstCaps *caps; GList *l; caps = gst_caps_new_simple ("audio/x-flac", "channels", G_TYPE_INT, enc->channels, "rate", G_TYPE_INT, enc->sample_rate, NULL); for (l = enc->headers; l != NULL; l = l->next) { const guint8 *data; guint size; /* mark buffers so oggmux will ignore them if it already muxed the * header buffers from the streamheaders field in the caps */ l->data = gst_buffer_make_metadata_writable (GST_BUFFER (l->data)); GST_BUFFER_FLAG_SET (GST_BUFFER (l->data), GST_BUFFER_FLAG_IN_CAPS); data = GST_BUFFER_DATA (GST_BUFFER_CAST (l->data)); size = GST_BUFFER_SIZE (GST_BUFFER_CAST (l->data)); /* find initial 4-byte marker which we need to skip later on */ if (size == 4 && memcmp (data, "fLaC", 4) == 0) { marker = GST_BUFFER_CAST (l->data); } else if (size > 1 && (data[0] & 0x7f) == HDR_TYPE_STREAMINFO) { streaminfo = GST_BUFFER_CAST (l->data); } else if (size > 1 && (data[0] & 0x7f) == HDR_TYPE_VORBISCOMMENT) { vorbiscomment = GST_BUFFER_CAST (l->data); } } if (marker == NULL || streaminfo == NULL || vorbiscomment == NULL) { GST_WARNING_OBJECT (enc, "missing header %p %p %p, muxing into container " "formats may be broken", marker, streaminfo, vorbiscomment); goto push_headers; } g_value_init (&array, GST_TYPE_ARRAY); /* add marker including STREAMINFO header */ { GstBuffer *buf; guint16 num; /* minus one for the marker that is merged with streaminfo here */ num = g_list_length (enc->headers) - 1; buf = gst_buffer_new_and_alloc (13 + GST_BUFFER_SIZE (streaminfo)); GST_BUFFER_DATA (buf)[0] = 0x7f; memcpy (GST_BUFFER_DATA (buf) + 1, "FLAC", 4); GST_BUFFER_DATA (buf)[5] = 0x01; /* mapping version major */ GST_BUFFER_DATA (buf)[6] = 0x00; /* mapping version minor */ GST_BUFFER_DATA (buf)[7] = (num & 0xFF00) >> 8; GST_BUFFER_DATA (buf)[8] = (num & 0x00FF) >> 0; memcpy (GST_BUFFER_DATA (buf) + 9, "fLaC", 4); memcpy (GST_BUFFER_DATA (buf) + 13, GST_BUFFER_DATA (streaminfo), GST_BUFFER_SIZE (streaminfo)); notgst_value_array_append_buffer (&array, buf); gst_buffer_unref (buf); } /* add VORBISCOMMENT header */ notgst_value_array_append_buffer (&array, vorbiscomment); /* add other headers, if there are any */ for (l = enc->headers; l != NULL; l = l->next) { if (GST_BUFFER_CAST (l->data) != marker && GST_BUFFER_CAST (l->data) != streaminfo && GST_BUFFER_CAST (l->data) != vorbiscomment) { notgst_value_array_append_buffer (&array, GST_BUFFER_CAST (l->data)); } } gst_structure_set_value (gst_caps_get_structure (caps, 0), "streamheader", &array); g_value_unset (&array); push_headers: gst_pad_set_caps (enc->srcpad, caps); /* push header buffers; update caps, so when we push the first buffer the * negotiated caps will change to caps that include the streamheader field */ for (l = enc->headers; l != NULL; l = l->next) { GstBuffer *buf; buf = GST_BUFFER (l->data); gst_buffer_set_caps (buf, caps); GST_LOG ("Pushing header buffer, size %u bytes", GST_BUFFER_SIZE (buf)); (void) gst_pad_push (enc->srcpad, buf); l->data = NULL; } g_list_free (enc->headers); enc->headers = NULL; gst_caps_unref (caps); } static FLAC__StreamEncoderWriteStatus gst_flac_enc_write_callback (const FLAC__StreamEncoder * encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, unsigned current_frame, void *client_data) { GstFlowReturn ret = GST_FLOW_OK; GstFlacEnc *flacenc; GstBuffer *outbuf; flacenc = GST_FLAC_ENC (client_data); if (flacenc->stopped) return FLAC__STREAM_ENCODER_WRITE_STATUS_OK; outbuf = gst_buffer_new_and_alloc (bytes); memcpy (GST_BUFFER_DATA (outbuf), buffer, bytes); if (samples > 0 && flacenc->samples_written != (guint64) - 1) { guint64 granulepos; GST_BUFFER_TIMESTAMP (outbuf) = flacenc->start_ts + GST_FRAMES_TO_CLOCK_TIME (flacenc->samples_written, flacenc->sample_rate); GST_BUFFER_DURATION (outbuf) = GST_FRAMES_TO_CLOCK_TIME (samples, flacenc->sample_rate); /* offset_end = granulepos for ogg muxer */ granulepos = flacenc->granulepos_offset + flacenc->samples_written + samples; GST_BUFFER_OFFSET_END (outbuf) = granulepos; /* offset = timestamp corresponding to granulepos for ogg muxer * (see vorbisenc for a much more elaborate version of this) */ GST_BUFFER_OFFSET (outbuf) = GST_FRAMES_TO_CLOCK_TIME (granulepos, flacenc->sample_rate); } else { GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE; GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE; GST_BUFFER_OFFSET (outbuf) = flacenc->samples_written * flacenc->width * flacenc->channels; GST_BUFFER_OFFSET_END (outbuf) = 0; GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_IN_CAPS); } /* we assume libflac passes us stuff neatly framed */ if (!flacenc->got_headers) { if (samples == 0) { GST_DEBUG_OBJECT (flacenc, "Got header, queueing (%u bytes)", (guint) bytes); flacenc->headers = g_list_append (flacenc->headers, outbuf); /* note: it's important that we increase our byte offset */ goto out; } else { GST_INFO_OBJECT (flacenc, "Non-header packet, we have all headers now"); gst_flac_enc_process_stream_headers (flacenc); flacenc->got_headers = TRUE; } } else if (flacenc->got_headers && samples == 0) { GST_WARNING_OBJECT (flacenc, "Got header packet after data packets"); } GST_LOG ("Pushing buffer: ts=%" GST_TIME_FORMAT ", samples=%u, size=%u, " "pos=%" G_GUINT64_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)), samples, (guint) bytes, flacenc->offset); gst_buffer_set_caps (outbuf, GST_PAD_CAPS (flacenc->srcpad)); ret = gst_pad_push (flacenc->srcpad, outbuf); if (ret != GST_FLOW_OK) GST_DEBUG_OBJECT (flacenc, "flow: %s", gst_flow_get_name (ret)); flacenc->last_flow = ret; out: flacenc->offset += bytes; flacenc->samples_written += samples; if (GST_FLOW_IS_FATAL (ret) || ret == GST_FLOW_NOT_LINKED) return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR; return FLAC__STREAM_ENCODER_WRITE_STATUS_OK; } static FLAC__StreamEncoderTellStatus gst_flac_enc_tell_callback (const FLAC__StreamEncoder * encoder, FLAC__uint64 * absolute_byte_offset, void *client_data) { GstFlacEnc *flacenc = GST_FLAC_ENC (client_data); *absolute_byte_offset = flacenc->offset; return FLAC__STREAM_ENCODER_TELL_STATUS_OK; } static gboolean gst_flac_enc_sink_event (GstPad * pad, GstEvent * event) { GstFlacEnc *flacenc; GstTagList *taglist; gboolean ret = TRUE; flacenc = GST_FLAC_ENC (gst_pad_get_parent (pad)); GST_DEBUG ("Received %s event on sinkpad", GST_EVENT_TYPE_NAME (event)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_NEWSEGMENT:{ GstFormat format; gint64 start, stream_time; if (flacenc->offset == 0) { gst_event_parse_new_segment (event, NULL, NULL, &format, &start, NULL, &stream_time); } else { start = -1; } if (start != 0) { if (flacenc->offset > 0) GST_DEBUG ("Not handling mid-stream newsegment event"); else GST_DEBUG ("Not handling newsegment event with non-zero start"); } else { GstEvent *e = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES, 0, -1, 0); ret = gst_pad_push_event (flacenc->srcpad, e); } if (stream_time != 0) { GST_DEBUG ("Not handling non-zero stream time"); } gst_event_unref (event); /* don't push it downstream, we'll generate our own via seek to 0 */ break; } case GST_EVENT_EOS: FLAC__stream_encoder_finish (flacenc->encoder); ret = gst_pad_event_default (pad, event); break; case GST_EVENT_TAG: if (flacenc->tags) { gst_event_parse_tag (event, &taglist); gst_tag_list_insert (flacenc->tags, taglist, gst_tag_setter_get_tag_merge_mode (GST_TAG_SETTER (flacenc))); } else { g_assert_not_reached (); } ret = gst_pad_event_default (pad, event); break; default: ret = gst_pad_event_default (pad, event); break; } gst_object_unref (flacenc); return ret; } static gboolean gst_flac_enc_check_discont (GstFlacEnc * flacenc, GstClockTime expected, GstClockTime timestamp) { guint allowed_diff = GST_SECOND / flacenc->sample_rate / 2; if ((timestamp + allowed_diff < expected) || (timestamp > expected + allowed_diff)) { GST_ELEMENT_WARNING (flacenc, STREAM, FORMAT, (NULL), ("Stream discontinuity detected (wanted %" GST_TIME_FORMAT " got %" GST_TIME_FORMAT "). The output will have wrong timestamps," " consider using audiorate to handle discontinuities", GST_TIME_ARGS (expected), GST_TIME_ARGS (timestamp))); return TRUE; } /* TODO: Do something to handle discontinuities in the stream. The FLAC encoder * unfortunately doesn't have any way to flush it's internal buffers */ return FALSE; } static GstFlowReturn gst_flac_enc_chain (GstPad * pad, GstBuffer * buffer) { GstFlacEnc *flacenc; FLAC__int32 *data; gulong insize; gint samples, width; gulong i; FLAC__bool res; flacenc = GST_FLAC_ENC (GST_PAD_PARENT (pad)); /* make sure setcaps has been called and the encoder is set up */ if (G_UNLIKELY (flacenc->depth == 0)) return GST_FLOW_NOT_NEGOTIATED; width = flacenc->width; /* Save the timestamp of the first buffer. This will be later * used as offset for all following buffers */ if (flacenc->start_ts == GST_CLOCK_TIME_NONE) { if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) { flacenc->start_ts = GST_BUFFER_TIMESTAMP (buffer); flacenc->granulepos_offset = gst_util_uint64_scale (GST_BUFFER_TIMESTAMP (buffer), flacenc->sample_rate, GST_SECOND); } else { flacenc->start_ts = 0; flacenc->granulepos_offset = 0; } } /* Check if we have a continous stream, if not drop some samples or the buffer or * insert some silence samples */ if (flacenc->next_ts != GST_CLOCK_TIME_NONE && GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) { gst_flac_enc_check_discont (flacenc, flacenc->next_ts, GST_BUFFER_TIMESTAMP (buffer)); } if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) flacenc->next_ts = GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer); else flacenc->next_ts = GST_CLOCK_TIME_NONE; insize = GST_BUFFER_SIZE (buffer); samples = insize / (width >> 3); data = g_malloc (samples * sizeof (FLAC__int32)); if (width == 8) { gint8 *indata = (gint8 *) GST_BUFFER_DATA (buffer); for (i = 0; i < samples; i++) data[i] = (FLAC__int32) indata[i]; } else if (width == 16) { gint16 *indata = (gint16 *) GST_BUFFER_DATA (buffer); for (i = 0; i < samples; i++) data[i] = (FLAC__int32) indata[i]; } else if (width == 32) { gint32 *indata = (gint32 *) GST_BUFFER_DATA (buffer); for (i = 0; i < samples; i++) data[i] = (FLAC__int32) indata[i]; } else { g_assert_not_reached (); } gst_buffer_unref (buffer); res = FLAC__stream_encoder_process_interleaved (flacenc->encoder, (const FLAC__int32 *) data, samples / flacenc->channels); g_free (data); if (!res) { if (flacenc->last_flow == GST_FLOW_OK) return GST_FLOW_ERROR; else return flacenc->last_flow; } return GST_FLOW_OK; } static void gst_flac_enc_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstFlacEnc *this = GST_FLAC_ENC (object); GST_OBJECT_LOCK (this); switch (prop_id) { case PROP_QUALITY: gst_flac_enc_update_quality (this, g_value_get_enum (value)); break; case PROP_STREAMABLE_SUBSET: FLAC__stream_encoder_set_streamable_subset (this->encoder, g_value_get_boolean (value)); break; case PROP_MID_SIDE_STEREO: FLAC__stream_encoder_set_do_mid_side_stereo (this->encoder, g_value_get_boolean (value)); break; case PROP_LOOSE_MID_SIDE_STEREO: FLAC__stream_encoder_set_loose_mid_side_stereo (this->encoder, g_value_get_boolean (value)); break; case PROP_BLOCKSIZE: FLAC__stream_encoder_set_blocksize (this->encoder, g_value_get_uint (value)); break; case PROP_MAX_LPC_ORDER: FLAC__stream_encoder_set_max_lpc_order (this->encoder, g_value_get_uint (value)); break; case PROP_QLP_COEFF_PRECISION: FLAC__stream_encoder_set_qlp_coeff_precision (this->encoder, g_value_get_uint (value)); break; case PROP_QLP_COEFF_PREC_SEARCH: FLAC__stream_encoder_set_do_qlp_coeff_prec_search (this->encoder, g_value_get_boolean (value)); break; case PROP_ESCAPE_CODING: FLAC__stream_encoder_set_do_escape_coding (this->encoder, g_value_get_boolean (value)); break; case PROP_EXHAUSTIVE_MODEL_SEARCH: FLAC__stream_encoder_set_do_exhaustive_model_search (this->encoder, g_value_get_boolean (value)); break; case PROP_MIN_RESIDUAL_PARTITION_ORDER: FLAC__stream_encoder_set_min_residual_partition_order (this->encoder, g_value_get_uint (value)); break; case PROP_MAX_RESIDUAL_PARTITION_ORDER: FLAC__stream_encoder_set_max_residual_partition_order (this->encoder, g_value_get_uint (value)); break; case PROP_RICE_PARAMETER_SEARCH_DIST: FLAC__stream_encoder_set_rice_parameter_search_dist (this->encoder, g_value_get_uint (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } GST_OBJECT_UNLOCK (this); } static void gst_flac_enc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstFlacEnc *this = GST_FLAC_ENC (object); GST_OBJECT_LOCK (this); switch (prop_id) { case PROP_QUALITY: g_value_set_enum (value, this->quality); break; case PROP_STREAMABLE_SUBSET: g_value_set_boolean (value, FLAC__stream_encoder_get_streamable_subset (this->encoder)); break; case PROP_MID_SIDE_STEREO: g_value_set_boolean (value, FLAC__stream_encoder_get_do_mid_side_stereo (this->encoder)); break; case PROP_LOOSE_MID_SIDE_STEREO: g_value_set_boolean (value, FLAC__stream_encoder_get_loose_mid_side_stereo (this->encoder)); break; case PROP_BLOCKSIZE: g_value_set_uint (value, FLAC__stream_encoder_get_blocksize (this->encoder)); break; case PROP_MAX_LPC_ORDER: g_value_set_uint (value, FLAC__stream_encoder_get_max_lpc_order (this->encoder)); break; case PROP_QLP_COEFF_PRECISION: g_value_set_uint (value, FLAC__stream_encoder_get_qlp_coeff_precision (this->encoder)); break; case PROP_QLP_COEFF_PREC_SEARCH: g_value_set_boolean (value, FLAC__stream_encoder_get_do_qlp_coeff_prec_search (this->encoder)); break; case PROP_ESCAPE_CODING: g_value_set_boolean (value, FLAC__stream_encoder_get_do_escape_coding (this->encoder)); break; case PROP_EXHAUSTIVE_MODEL_SEARCH: g_value_set_boolean (value, FLAC__stream_encoder_get_do_exhaustive_model_search (this->encoder)); break; case PROP_MIN_RESIDUAL_PARTITION_ORDER: g_value_set_uint (value, FLAC__stream_encoder_get_min_residual_partition_order (this->encoder)); break; case PROP_MAX_RESIDUAL_PARTITION_ORDER: g_value_set_uint (value, FLAC__stream_encoder_get_max_residual_partition_order (this->encoder)); break; case PROP_RICE_PARAMETER_SEARCH_DIST: g_value_set_uint (value, FLAC__stream_encoder_get_rice_parameter_search_dist (this->encoder)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } GST_OBJECT_UNLOCK (this); } static GstStateChangeReturn gst_flac_enc_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; GstFlacEnc *flacenc = GST_FLAC_ENC (element); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: case GST_STATE_CHANGE_READY_TO_PAUSED: flacenc->stopped = FALSE; flacenc->start_ts = GST_CLOCK_TIME_NONE; flacenc->next_ts = GST_CLOCK_TIME_NONE; flacenc->granulepos_offset = 0; break; case GST_STATE_CHANGE_PAUSED_TO_PLAYING: default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PLAYING_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_READY: if (FLAC__stream_encoder_get_state (flacenc->encoder) != FLAC__STREAM_ENCODER_UNINITIALIZED) { flacenc->stopped = TRUE; FLAC__stream_encoder_finish (flacenc->encoder); } flacenc->offset = 0; flacenc->samples_written = 0; flacenc->channels = 0; flacenc->depth = 0; flacenc->sample_rate = 0; if (flacenc->meta) { FLAC__metadata_object_delete (flacenc->meta[0]); g_free (flacenc->meta); flacenc->meta = NULL; } g_list_foreach (flacenc->headers, (GFunc) gst_mini_object_unref, NULL); g_list_free (flacenc->headers); flacenc->headers = NULL; flacenc->got_headers = FALSE; flacenc->last_flow = GST_FLOW_OK; break; case GST_STATE_CHANGE_READY_TO_NULL: default: break; } return ret; }