ext/flac/gstflacenc.c

   1 /* GStreamer
   2  * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include <gstflacenc.h>
  28 #include <gst/tags/gsttagediting.h>
  29 #include <gst/gsttaginterface.h>
  30 #include "flac_compat.h"
  31
  32 static GstPadTemplate *src_template, *sink_template;
  33
  34 /* elementfactory information */
  35 GstElementDetails flacenc_details = {
  36   "FLAC encoder",
  37   "Codec/Encoder/Audio",
  38   "Encodes audio with the FLAC lossless audio encoder",
  39   "Wim Taymans <wim.taymans@chello.be>",
  40 };
  41
  42 /* FlacEnc signals and args */
  43 enum {
  44   /* FILL ME */
  45   LAST_SIGNAL
  46 };
  47
  48 enum {
  49   ARG_0,
  50   ARG_QUALITY,
  51   ARG_STREAMABLE_SUBSET,
  52   ARG_MID_SIDE_STEREO,
  53   ARG_LOOSE_MID_SIDE_STEREO,
  54   ARG_BLOCKSIZE,
  55   ARG_MAX_LPC_ORDER,
  56   ARG_QLP_COEFF_PRECISION,
  57   ARG_QLP_COEFF_PREC_SEARCH,
  58   ARG_ESCAPE_CODING,
  59   ARG_EXHAUSTIVE_MODEL_SEARCH,
  60   ARG_MIN_RESIDUAL_PARTITION_ORDER,
  61   ARG_MAX_RESIDUAL_PARTITION_ORDER,
  62   ARG_RICE_PARAMETER_SEARCH_DIST,
  63 };
  64
  65 static void             gst_flacenc_base_init           (gpointer g_class);
  66 static void             gst_flacenc_init                (FlacEnc *flacenc);
  67 static void             gst_flacenc_class_init          (FlacEncClass *klass);
  68 static void             gst_flacenc_dispose             (GObject *object);
  69
  70 static GstPadLinkReturn
  71                         gst_flacenc_sinkconnect         (GstPad *pad, GstCaps *caps);
  72 static void             gst_flacenc_chain               (GstPad *pad, GstData *_data);
  73
  74 static gboolean         gst_flacenc_update_quality      (FlacEnc *flacenc, gint quality);
  75 static void             gst_flacenc_set_property        (GObject *object, guint prop_id,
  76                                                          const GValue *value, GParamSpec *pspec);
  77 static void             gst_flacenc_get_property        (GObject *object, guint prop_id,
  78                                                          GValue *value, GParamSpec *pspec);
  79 static GstElementStateReturn
  80                         gst_flacenc_change_state        (GstElement *element);
  81
  82 static FLAC__StreamEncoderWriteStatus
  83                         gst_flacenc_write_callback      (const FLAC__SeekableStreamEncoder *encoder,
  84                                                          const FLAC__byte buffer[], unsigned bytes,
  85                                                          unsigned samples, unsigned current_frame,
  86                                                          void *client_data);
  87 static FLAC__SeekableStreamEncoderSeekStatus
  88                         gst_flacenc_seek_callback       (const FLAC__SeekableStreamEncoder *encoder,
  89                                                          FLAC__uint64 absolute_byte_offset,
  90                                                          void *client_data);
  91
  92 static GstElementClass *parent_class = NULL;
  93 /*static guint gst_flacenc_signals[LAST_SIGNAL] = { 0 }; */
  94
  95 GType
  96 flacenc_get_type (void)
  97 {
  98   static GType flacenc_type = 0;
  99
 100   if (!flacenc_type) {
 101     static const GTypeInfo flacenc_info = {
 102       sizeof(FlacEncClass),
 103       gst_flacenc_base_init,
 104       NULL,
 105       (GClassInitFunc)gst_flacenc_class_init,
 106       NULL,
 107       NULL,
 108       sizeof(FlacEnc),
 109       0,
 110       (GInstanceInitFunc)gst_flacenc_init,
 111     };
 112
 113     static const GInterfaceInfo tag_setter_info = {
 114       NULL,
 115       NULL,
 116       NULL
 117     };
 118
 119     flacenc_type = g_type_register_static (GST_TYPE_ELEMENT, "FlacEnc", &flacenc_info, 0);
 120     g_type_add_interface_static (flacenc_type, GST_TYPE_TAG_SETTER, &tag_setter_info);
 121   }
 122   return flacenc_type;
 123 }
 124
 125 typedef struct {
 126   gboolean      exhaustive_model_search;
 127   gboolean      escape_coding;
 128   gboolean      mid_side;
 129   gboolean      loose_mid_side;
 130   guint         qlp_coeff_precision;
 131   gboolean      qlp_coeff_prec_search;
 132   guint         min_residual_partition_order;
 133   guint         max_residual_partition_order;
 134   guint         rice_parameter_search_dist;
 135   guint         max_lpc_order;
 136   guint         blocksize;
 137 } FlacEncParams;
 138
 139 static const FlacEncParams flacenc_params[] =
 140 {
 141   { FALSE, FALSE, FALSE, FALSE, 0, FALSE, 2, 2,  0, 0,  1152 },
 142   { FALSE, FALSE, TRUE,  TRUE,  0, FALSE, 2, 2,  0, 0,  1152 },
 143   { FALSE, FALSE, TRUE,  FALSE, 0, FALSE, 0, 3,  0, 0,  1152 },
 144   { FALSE, FALSE, FALSE, FALSE, 0, FALSE, 3, 3,  0, 6,  4608 },
 145   { FALSE, FALSE, TRUE,  TRUE,  0, FALSE, 3, 3,  0, 8,  4608 },
 146   { FALSE, FALSE, TRUE,  FALSE, 0, FALSE, 3, 3,  0, 8,  4608 },
 147   { FALSE, FALSE, TRUE,  FALSE, 0, FALSE, 0, 4,  0, 8,  4608 },
 148   { TRUE,  FALSE, TRUE,  FALSE, 0, FALSE, 0, 6,  0, 8,  4608 },
 149   { TRUE,  FALSE, TRUE,  FALSE, 0, FALSE, 0, 6,  0, 12, 4608 },
 150   { TRUE,  TRUE,  TRUE,  FALSE, 0, FALSE, 0, 16, 0, 32, 4608 },
 151 };
 152
 153 #define DEFAULT_QUALITY 5
 154
 155 #define GST_TYPE_FLACENC_QUALITY (gst_flacenc_quality_get_type ())
 156 GType
 157 gst_flacenc_quality_get_type (void)
 158 {
 159   static GType qtype = 0;
 160   if (qtype == 0) {
 161     static const GEnumValue values[] = {
 162       { 0, "0", "0 - Fastest compression" },
 163       { 1, "1", "1" },
 164       { 2, "2", "2" },
 165       { 3, "3", "3" },
 166       { 4, "4", "4" },
 167       { 5, "5", "5 - Default" },
 168       { 6, "6", "6" },
 169       { 7, "7", "7" },
 170       { 8, "8", "8 - Highest compression " },
 171       { 9, "9", "9 - Insane" },
 172       { 0, NULL, NULL }
 173     };
 174     qtype = g_enum_register_static ("FlacEncQuality", values);
 175   }
 176   return qtype;
 177 }
 178
 179 static GstCaps*
 180 flac_caps_factory (void)
 181 {
 182   return
 183    gst_caps_new (
 184         "flac_flac",
 185         "application/x-flac",
 186         /* gst_props_new (
 187             "rate",             GST_PROPS_INT_RANGE (11025, 48000),
 188             "channels",         GST_PROPS_INT_RANGE (1, 2),
 189             NULL) */NULL);
 190 }
 191
 192 static GstCaps*
 193 raw_caps_factory (void)
 194 {
 195   return
 196    gst_caps_new (
 197         "flac_raw",
 198         "audio/x-raw-int",
 199         gst_props_new (
 200             "endianness",       GST_PROPS_INT (G_BYTE_ORDER),
 201             "signed",           GST_PROPS_BOOLEAN (TRUE),
 202             "width",            GST_PROPS_INT (16),
 203             "depth",            GST_PROPS_INT (16),
 204             "rate",             GST_PROPS_INT_RANGE (11025, 48000),
 205             "channels",         GST_PROPS_INT_RANGE (1, 2),
 206             NULL));
 207 }
 208
 209 static void
 210 gst_flacenc_base_init (gpointer g_class)
 211 {
 212   GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
 213   GstCaps *raw_caps, *flac_caps;
 214
 215   raw_caps = raw_caps_factory ();
 216   flac_caps = flac_caps_factory ();
 217
 218   sink_template = gst_pad_template_new ("sink", GST_PAD_SINK,
 219                                         GST_PAD_ALWAYS,
 220                                         raw_caps, NULL);
 221   src_template = gst_pad_template_new ("src", GST_PAD_SRC,
 222                                        GST_PAD_ALWAYS,
 223                                        flac_caps, NULL);
 224   gst_element_class_add_pad_template (element_class, sink_template);
 225   gst_element_class_add_pad_template (element_class, src_template);
 226   gst_element_class_set_details (element_class, &flacenc_details);
 227 }
 228
 229 static void
 230 gst_flacenc_class_init (FlacEncClass *klass)
 231 {
 232   GObjectClass *gobject_class;
 233   GstElementClass *gstelement_class;
 234
 235   gobject_class = (GObjectClass*)klass;
 236   gstelement_class = (GstElementClass*)klass;
 237
 238   parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
 239
 240   /* we have no properties atm so this is a bit silly */
 241   gobject_class->set_property = gst_flacenc_set_property;
 242   gobject_class->get_property = gst_flacenc_get_property;
 243   gobject_class->dispose      = gst_flacenc_dispose;
 244
 245   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QUALITY,
 246     g_param_spec_enum ("quality",
 247                        "Quality",
 248                        "Speed versus compression tradeoff",
 249                        GST_TYPE_FLACENC_QUALITY, DEFAULT_QUALITY, G_PARAM_READWRITE));
 250   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_STREAMABLE_SUBSET,
 251     g_param_spec_boolean ("streamable_subset",
 252                           "Streamable subset",
 253                           "true to limit encoder to generating a Subset stream, else false",
 254                           TRUE, G_PARAM_READWRITE));
 255   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MID_SIDE_STEREO,
 256     g_param_spec_boolean ("mid_side_stereo",
 257                           "Do mid side stereo",
 258                           "Do mid side stereo (only for stereo input)",
 259                           flacenc_params[DEFAULT_QUALITY].mid_side, G_PARAM_READWRITE));
 260   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOOSE_MID_SIDE_STEREO,
 261     g_param_spec_boolean ("loose_mid_side_stereo",
 262                           "Loose mid side stereo",
 263                           "Loose mid side stereo",
 264                           flacenc_params[DEFAULT_QUALITY].loose_mid_side, G_PARAM_READWRITE));
 265   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
 266     g_param_spec_uint ("blocksize",
 267                        "Blocksize",
 268                        "Blocksize in samples",
 269                        FLAC__MIN_BLOCK_SIZE, FLAC__MAX_BLOCK_SIZE,
 270                        flacenc_params[DEFAULT_QUALITY].blocksize, G_PARAM_READWRITE));
 271   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MAX_LPC_ORDER,
 272     g_param_spec_uint ("max_lpc_order",
 273                        "Max LPC order",
 274                        "Max LPC order; 0 => use only fixed predictors",
 275                        0, FLAC__MAX_LPC_ORDER,
 276                        flacenc_params[DEFAULT_QUALITY].max_lpc_order, G_PARAM_READWRITE));
 277   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QLP_COEFF_PRECISION,
 278     g_param_spec_uint ("qlp_coeff_precision",
 279                        "QLP coefficients precision",
 280                        "Precision in bits of quantized linear-predictor coefficients; 0 = automatic",
 281                        0, 32,
 282                        flacenc_params[DEFAULT_QUALITY].qlp_coeff_precision, G_PARAM_READWRITE));
 283   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QLP_COEFF_PREC_SEARCH,
 284     g_param_spec_boolean ("qlp_coeff_prec_search",
 285                           "Do QLP coefficients precision search",
 286                           "false = use qlp_coeff_precision, "
 287                             "true = search around qlp_coeff_precision, take best",
 288                           flacenc_params[DEFAULT_QUALITY].qlp_coeff_prec_search, G_PARAM_READWRITE));
 289   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ESCAPE_CODING,
 290     g_param_spec_boolean ("escape_coding",
 291                           "Do Escape coding",
 292                           "search for escape codes in the entropy coding stage "
 293                             "for slightly better compression",
 294                           flacenc_params[DEFAULT_QUALITY].escape_coding, G_PARAM_READWRITE));
 295   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_EXHAUSTIVE_MODEL_SEARCH,
 296     g_param_spec_boolean ("exhaustive_model_search",
 297                           "Do exhaustive model search",
 298                           "do exhaustive search of LP coefficient quantization (expensive!)",
 299                           flacenc_params[DEFAULT_QUALITY].exhaustive_model_search, G_PARAM_READWRITE));
 300   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MIN_RESIDUAL_PARTITION_ORDER,
 301     g_param_spec_uint ("min_residual_partition_order",
 302                        "Min residual partition order",
 303                        "Min residual partition order (above 4 doesn't usually help much)",
 304                        0, 16,
 305                        flacenc_params[DEFAULT_QUALITY].min_residual_partition_order, G_PARAM_READWRITE));
 306   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MAX_RESIDUAL_PARTITION_ORDER,
 307     g_param_spec_uint ("max_residual_partition_order",
 308                        "Max residual partition order",
 309                        "Max residual partition order (above 4 doesn't usually help much)",
 310                        0, 16,
 311                        flacenc_params[DEFAULT_QUALITY].max_residual_partition_order, G_PARAM_READWRITE));
 312   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_RICE_PARAMETER_SEARCH_DIST,
 313     g_param_spec_uint ("rice_parameter_search_dist",
 314                        "rice_parameter_search_dist",
 315                        "0 = try only calc'd parameter k; else try all [k-dist..k+dist] "
 316                          "parameters, use best",
 317                        0, FLAC__MAX_RICE_PARTITION_ORDER,
 318                        flacenc_params[DEFAULT_QUALITY].rice_parameter_search_dist, G_PARAM_READWRITE));
 319
 320   gstelement_class->change_state = gst_flacenc_change_state;
 321 }
 322
 323 static void
 324 gst_flacenc_init (FlacEnc *flacenc)
 325 {
 326   flacenc->sinkpad = gst_pad_new_from_template (sink_template, "sink");
 327   gst_element_add_pad(GST_ELEMENT(flacenc),flacenc->sinkpad);
 328   gst_pad_set_chain_function(flacenc->sinkpad,gst_flacenc_chain);
 329   gst_pad_set_link_function (flacenc->sinkpad, gst_flacenc_sinkconnect);
 330
 331   flacenc->srcpad = gst_pad_new_from_template (src_template, "src");
 332   gst_element_add_pad(GST_ELEMENT(flacenc),flacenc->srcpad);
 333
 334   GST_FLAG_SET (flacenc, GST_ELEMENT_EVENT_AWARE);
 335
 336   flacenc->encoder = FLAC__seekable_stream_encoder_new();
 337
 338   FLAC__seekable_stream_encoder_set_write_callback (flacenc->encoder,
 339                                         gst_flacenc_write_callback);
 340   FLAC__seekable_stream_encoder_set_seek_callback (flacenc->encoder,
 341                                         gst_flacenc_seek_callback);
 342
 343   FLAC__seekable_stream_encoder_set_client_data (flacenc->encoder,
 344                                         flacenc);
 345
 346   flacenc->negotiated = FALSE;
 347   flacenc->first = TRUE;
 348   flacenc->first_buf = NULL;
 349   flacenc->data = NULL;
 350   gst_flacenc_update_quality (flacenc, DEFAULT_QUALITY);
 351   flacenc->tags = gst_tag_list_new ();
 352 }
 353
 354 static void
 355 gst_flacenc_dispose (GObject *object)
 356 {
 357   FlacEnc *flacenc = GST_FLACENC (object);
 358
 359   FLAC__seekable_stream_encoder_delete (flacenc->encoder);
 360
 361   G_OBJECT_CLASS (parent_class)->dispose (object);
 362 }
 363
 364 static GstPadLinkReturn
 365 gst_flacenc_sinkconnect (GstPad *pad, GstCaps *caps)
 366 {
 367   GstPadLinkReturn ret;
 368   FlacEnc *flacenc;
 369
 370   flacenc = GST_FLACENC (gst_pad_get_parent (pad));
 371
 372   if (!GST_CAPS_IS_FIXED (caps))
 373     return GST_PAD_LINK_DELAYED;
 374
 375   gst_caps_get_int (caps, "channels", &flacenc->channels);
 376   gst_caps_get_int (caps, "depth", &flacenc->depth);
 377   gst_caps_get_int (caps, "rate", &flacenc->sample_rate);
 378
 379   caps = GST_CAPS_NEW ("flacenc_srccaps",
 380                        "application/x-flac",
 381                          "channels", GST_PROPS_INT (flacenc->channels),
 382                          "rate", GST_PROPS_INT (flacenc->sample_rate));
 383   ret = gst_pad_try_set_caps (flacenc->srcpad, caps);
 384   if (ret <= 0) {
 385     return ret;
 386   }
 387
 388   FLAC__seekable_stream_encoder_set_bits_per_sample (flacenc->encoder,
 389                                             flacenc->depth);
 390   FLAC__seekable_stream_encoder_set_sample_rate (flacenc->encoder,
 391                                         flacenc->sample_rate);
 392   FLAC__seekable_stream_encoder_set_channels (flacenc->encoder,
 393                                      flacenc->channels);
 394
 395   flacenc->negotiated = TRUE;
 396
 397   return ret;
 398 }
 399
 400 static gboolean
 401 gst_flacenc_update_quality (FlacEnc *flacenc, gint quality)
 402 {
 403   flacenc->quality = quality;
 404
 405 #define DO_UPDATE(name, val, str)                               \
 406   G_STMT_START {                                                \
 407     if (FLAC__seekable_stream_encoder_get_##name (flacenc->encoder) !=  \
 408         flacenc_params[quality].val) {                          \
 409       FLAC__seekable_stream_encoder_set_##name (flacenc->encoder,       \
 410           flacenc_params[quality].val);                         \
 411       g_object_notify (G_OBJECT (flacenc), str);                \
 412     }                                                           \
 413   } G_STMT_END
 414
 415   g_object_freeze_notify (G_OBJECT (flacenc));
 416
 417   DO_UPDATE (do_mid_side_stereo,           mid_side,                     "mid_side_stereo");
 418   DO_UPDATE (loose_mid_side_stereo,        loose_mid_side,               "loose_mid_side");
 419   DO_UPDATE (blocksize,                    blocksize,                    "blocksize");
 420   DO_UPDATE (max_lpc_order,                max_lpc_order,                "max_lpc_order");
 421   DO_UPDATE (qlp_coeff_precision,          qlp_coeff_precision,          "qlp_coeff_precision");
 422   DO_UPDATE (do_qlp_coeff_prec_search,     qlp_coeff_prec_search,        "qlp_coeff_prec_search");
 423   DO_UPDATE (do_escape_coding,             escape_coding,                "escape_coding");
 424   DO_UPDATE (do_exhaustive_model_search,   exhaustive_model_search,      "exhaustive_model_search");
 425   DO_UPDATE (min_residual_partition_order, min_residual_partition_order, "min_residual_partition_order");
 426   DO_UPDATE (max_residual_partition_order, max_residual_partition_order, "max_residual_partition_order");
 427   DO_UPDATE (rice_parameter_search_dist,   rice_parameter_search_dist,   "rice_parameter_search_dist");
 428
 429 #undef DO_UPDATE
 430
 431   g_object_thaw_notify (G_OBJECT (flacenc));
 432
 433   return TRUE;
 434 }
 435
 436 static FLAC__SeekableStreamEncoderSeekStatus
 437 gst_flacenc_seek_callback (const FLAC__SeekableStreamEncoder *encoder,
 438                            FLAC__uint64 absolute_byte_offset,
 439                            void *client_data)
 440 {
 441 FlacEnc *flacenc;
 442 GstEvent *event;
 443
 444   flacenc = GST_FLACENC (client_data);
 445
 446   if (flacenc->stopped)
 447     return FLAC__STREAM_ENCODER_OK;
 448
 449   event = gst_event_new_seek ((GstSeekType)(int)(GST_FORMAT_BYTES | GST_SEEK_METHOD_SET), absolute_byte_offset);
 450
 451   if (event)
 452     gst_pad_push (flacenc->srcpad, GST_DATA (event));
 453
 454   return  FLAC__STREAM_ENCODER_OK;
 455 }
 456
 457 static FLAC__StreamEncoderWriteStatus
 458 gst_flacenc_write_callback (const FLAC__SeekableStreamEncoder *encoder,
 459                             const FLAC__byte buffer[], unsigned bytes,
 460                             unsigned samples, unsigned current_frame,
 461                             void *client_data)
 462 {
 463   FlacEnc *flacenc;
 464   GstBuffer *outbuf;
 465
 466   flacenc = GST_FLACENC (client_data);
 467
 468   if (flacenc->stopped)
 469     return FLAC__STREAM_ENCODER_OK;
 470
 471   outbuf = gst_buffer_new_and_alloc (bytes);
 472
 473   memcpy (GST_BUFFER_DATA (outbuf), buffer, bytes);
 474
 475   if (flacenc->first) {
 476     flacenc->first_buf = outbuf;
 477     gst_buffer_ref (outbuf);
 478     flacenc->first = FALSE;
 479   }
 480
 481   gst_pad_push (flacenc->srcpad, GST_DATA (outbuf));
 482
 483   return FLAC__STREAM_ENCODER_OK;
 484 }
 485
 486 void  add_one_tag (const GstTagList *list,
 487                    const gchar *tag,
 488                    gpointer user_data)
 489 {
 490       GList *comments;
 491       GList *it;
 492       FlacEnc *flacenc = GST_FLACENC (user_data);
 493
 494       comments = gst_tag_to_vorbis_comments (list, tag);
 495       for (it = comments; it != NULL; it = it->next) {
 496               FLAC__StreamMetadata_VorbisComment_Entry commment_entry;
 497               commment_entry.length = GUINT32_TO_LE (strlen(it->data) + 1);
 498               commment_entry.entry  =  it->data;
 499               FLAC__metadata_object_vorbiscomment_insert_comment (flacenc->meta[0],
 500                                                                   flacenc->meta[0]->data.vorbis_comment.num_comments,
 501                                                                   commment_entry,
 502                                                                   TRUE);
 503               g_free (it->data);
 504       }
 505       g_list_free (comments);
 506 }
 507
 508 static void
 509 gst_flacenc_set_metadata (FlacEnc *flacenc)
 510 {
 511   const GstTagList *user_tags;
 512   GstTagList *copy;
 513
 514   g_return_if_fail (flacenc != NULL);
 515   user_tags = gst_tag_setter_get_list (GST_TAG_SETTER (flacenc));
 516   if ((flacenc->tags == NULL) && (user_tags == NULL)) {
 517     return;
 518   }
 519   copy = gst_tag_list_merge (user_tags, flacenc->tags,
 520                              gst_tag_setter_get_merge_mode (GST_TAG_SETTER (flacenc)));
 521   flacenc->meta = g_malloc (sizeof (FLAC__StreamMetadata **));
 522
 523   flacenc->meta[0] = FLAC__metadata_object_new (FLAC__METADATA_TYPE_VORBIS_COMMENT);
 524   gst_tag_list_foreach ((GstTagList*)copy, add_one_tag, flacenc);
 525
 526   FLAC__seekable_stream_encoder_set_metadata(flacenc->encoder, flacenc->meta, 1);
 527   gst_tag_list_free (copy);
 528 }
 529
 530
 531 static void
 532 gst_flacenc_chain (GstPad *pad, GstData *_data)
 533 {
 534   GstBuffer *buf = GST_BUFFER (_data);
 535   FlacEnc *flacenc;
 536   FLAC__int32 *data;
 537   gulong insize;
 538   gint samples, depth;
 539   gulong i;
 540   FLAC__bool res;
 541
 542   g_return_if_fail(buf != NULL);
 543
 544   flacenc = GST_FLACENC (gst_pad_get_parent (pad));
 545
 546   if (GST_IS_EVENT (buf)) {
 547     GstEvent *event = GST_EVENT (buf);
 548
 549     switch (GST_EVENT_TYPE (event)) {
 550       case GST_EVENT_EOS:
 551         FLAC__seekable_stream_encoder_finish(flacenc->encoder);
 552         break;
 553       case GST_EVENT_TAG:
 554         if (flacenc->tags) {
 555           gst_tag_list_merge (flacenc->tags, gst_event_tag_get_list (event),
 556                   gst_tag_setter_get_merge_mode (GST_TAG_SETTER (flacenc)));
 557         } else {
 558           g_assert_not_reached ();
 559         }
 560         break;
 561       default:
 562         break;
 563     }
 564     gst_pad_event_default (pad, event);
 565     return;
 566   }
 567
 568   if (!flacenc->negotiated) {
 569     gst_element_error (GST_ELEMENT (flacenc),
 570                     "format not negotiated");
 571     return;
 572   }
 573
 574   depth = flacenc->depth;
 575
 576   insize = GST_BUFFER_SIZE (buf);
 577   samples = insize / ((depth+7)>>3);
 578
 579   if (FLAC__seekable_stream_encoder_get_state (flacenc->encoder) ==
 580                   FLAC__SEEKABLE_STREAM_ENCODER_UNINITIALIZED)
 581   {
 582     FLAC__SeekableStreamEncoderState state;
 583     gst_flacenc_set_metadata (flacenc);
 584     state = FLAC__seekable_stream_encoder_init (flacenc->encoder);
 585     if (state != FLAC__STREAM_ENCODER_OK) {
 586       gst_element_error (GST_ELEMENT (flacenc),
 587                          "could not initialize encoder (wrong parameters?)");
 588       return;
 589     }
 590   }
 591
 592   /* we keep a pointer in the flacenc struct because we are freeing the data
 593    * after a push opreration that might never return */
 594   data = flacenc->data = g_malloc (samples * sizeof (FLAC__int32));
 595
 596   if (depth == 8) {
 597     gint8 *indata = (gint8 *) GST_BUFFER_DATA (buf);
 598
 599
 600     for (i=0; i<samples; i++) {
 601       data[i] = (FLAC__int32) *indata++;
 602     }
 603   }
 604   else if (depth == 16) {
 605     gint16 *indata = (gint16 *) GST_BUFFER_DATA (buf);
 606
 607     for (i=0; i<samples; i++) {
 608       data[i] = (FLAC__int32) *indata++;
 609     }
 610   }
 611
 612   gst_buffer_unref(buf);
 613
 614   res = FLAC__seekable_stream_encoder_process_interleaved (flacenc->encoder,
 615                               (const FLAC__int32 *) data, samples / flacenc->channels);
 616
 617   g_free (flacenc->data);
 618   flacenc->data = NULL;
 619
 620   if (!res) {
 621     gst_element_error (GST_ELEMENT (flacenc),
 622                          "encoding error");
 623   }
 624 }
 625
 626 static void
 627 gst_flacenc_set_property (GObject *object, guint prop_id,
 628                           const GValue *value, GParamSpec *pspec)
 629 {
 630   FlacEnc *this;
 631
 632   this = (FlacEnc *)object;
 633   switch (prop_id) {
 634     case ARG_QUALITY:
 635       gst_flacenc_update_quality (this, g_value_get_enum (value));
 636       break;
 637     case ARG_STREAMABLE_SUBSET:
 638       FLAC__seekable_stream_encoder_set_streamable_subset (this->encoder,
 639                            g_value_get_boolean (value));
 640       break;
 641     case ARG_MID_SIDE_STEREO:
 642       FLAC__seekable_stream_encoder_set_do_mid_side_stereo (this->encoder,
 643                            g_value_get_boolean (value));
 644       break;
 645     case ARG_LOOSE_MID_SIDE_STEREO:
 646       FLAC__seekable_stream_encoder_set_loose_mid_side_stereo (this->encoder,
 647                            g_value_get_boolean (value));
 648       break;
 649     case ARG_BLOCKSIZE:
 650       FLAC__seekable_stream_encoder_set_blocksize (this->encoder,
 651                            g_value_get_uint (value));
 652       break;
 653     case ARG_MAX_LPC_ORDER:
 654       FLAC__seekable_stream_encoder_set_max_lpc_order (this->encoder,
 655                            g_value_get_uint (value));
 656       break;
 657     case ARG_QLP_COEFF_PRECISION:
 658       FLAC__seekable_stream_encoder_set_qlp_coeff_precision (this->encoder,
 659                            g_value_get_uint (value));
 660       break;
 661     case ARG_QLP_COEFF_PREC_SEARCH:
 662       FLAC__seekable_stream_encoder_set_do_qlp_coeff_prec_search (this->encoder,
 663                            g_value_get_boolean (value));
 664       break;
 665     case ARG_ESCAPE_CODING:
 666       FLAC__seekable_stream_encoder_set_do_escape_coding (this->encoder,
 667                            g_value_get_boolean (value));
 668       break;
 669     case ARG_EXHAUSTIVE_MODEL_SEARCH:
 670       FLAC__seekable_stream_encoder_set_do_exhaustive_model_search (this->encoder,
 671                            g_value_get_boolean (value));
 672       break;
 673     case ARG_MIN_RESIDUAL_PARTITION_ORDER:
 674       FLAC__seekable_stream_encoder_set_min_residual_partition_order (this->encoder,
 675                            g_value_get_uint (value));
 676       break;
 677     case ARG_MAX_RESIDUAL_PARTITION_ORDER:
 678       FLAC__seekable_stream_encoder_set_max_residual_partition_order (this->encoder,
 679                            g_value_get_uint (value));
 680       break;
 681     case ARG_RICE_PARAMETER_SEARCH_DIST:
 682       FLAC__seekable_stream_encoder_set_rice_parameter_search_dist (this->encoder,
 683                                                  g_value_get_uint (value));
 684       break;
 685     default:
 686       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 687       return;
 688   }
 689 }
 690
 691 static void
 692 gst_flacenc_get_property (GObject *object, guint prop_id,
 693                           GValue *value, GParamSpec *pspec)
 694 {
 695   FlacEnc *this;
 696
 697   this = (FlacEnc *)object;
 698
 699   switch (prop_id) {
 700     case ARG_QUALITY:
 701       g_value_set_enum (value, this->quality);
 702       break;
 703     case ARG_STREAMABLE_SUBSET:
 704       g_value_set_boolean (value,
 705               FLAC__seekable_stream_encoder_get_streamable_subset (this->encoder));
 706       break;
 707     case ARG_MID_SIDE_STEREO:
 708       g_value_set_boolean (value,
 709               FLAC__seekable_stream_encoder_get_do_mid_side_stereo (this->encoder));
 710       break;
 711     case ARG_LOOSE_MID_SIDE_STEREO:
 712       g_value_set_boolean (value,
 713               FLAC__seekable_stream_encoder_get_loose_mid_side_stereo (this->encoder));
 714       break;
 715     case ARG_BLOCKSIZE:
 716       g_value_set_uint (value,
 717               FLAC__seekable_stream_encoder_get_blocksize (this->encoder));
 718       break;
 719     case ARG_MAX_LPC_ORDER:
 720       g_value_set_uint (value,
 721               FLAC__seekable_stream_encoder_get_max_lpc_order (this->encoder));
 722       break;
 723     case ARG_QLP_COEFF_PRECISION:
 724       g_value_set_uint (value,
 725               FLAC__seekable_stream_encoder_get_qlp_coeff_precision (this->encoder));
 726       break;
 727     case ARG_QLP_COEFF_PREC_SEARCH:
 728       g_value_set_boolean (value,
 729               FLAC__seekable_stream_encoder_get_do_qlp_coeff_prec_search (this->encoder));
 730       break;
 731     case ARG_ESCAPE_CODING:
 732       g_value_set_boolean (value,
 733               FLAC__seekable_stream_encoder_get_do_escape_coding (this->encoder));
 734       break;
 735     case ARG_EXHAUSTIVE_MODEL_SEARCH:
 736       g_value_set_boolean (value,
 737               FLAC__seekable_stream_encoder_get_do_exhaustive_model_search (this->encoder));
 738       break;
 739     case ARG_MIN_RESIDUAL_PARTITION_ORDER:
 740       g_value_set_uint (value,
 741               FLAC__seekable_stream_encoder_get_min_residual_partition_order (this->encoder));
 742       break;
 743     case ARG_MAX_RESIDUAL_PARTITION_ORDER:
 744       g_value_set_uint (value,
 745               FLAC__seekable_stream_encoder_get_max_residual_partition_order (this->encoder));
 746       break;
 747     case ARG_RICE_PARAMETER_SEARCH_DIST:
 748       g_value_set_uint (value,
 749               FLAC__seekable_stream_encoder_get_rice_parameter_search_dist (this->encoder));
 750       break;
 751     default:
 752       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 753       break;
 754   }
 755 }
 756
 757 static GstElementStateReturn
 758 gst_flacenc_change_state (GstElement *element)
 759 {
 760   FlacEnc *flacenc = GST_FLACENC (element);
 761
 762   switch (GST_STATE_TRANSITION (element)) {
 763     case GST_STATE_NULL_TO_READY:
 764     case GST_STATE_READY_TO_PAUSED:
 765       flacenc->first = TRUE;
 766       flacenc->stopped = FALSE;
 767       break;
 768     case GST_STATE_PAUSED_TO_PLAYING:
 769     case GST_STATE_PLAYING_TO_PAUSED:
 770       break;
 771     case GST_STATE_PAUSED_TO_READY:
 772       if (FLAC__seekable_stream_encoder_get_state (flacenc->encoder) !=
 773                         FLAC__STREAM_ENCODER_UNINITIALIZED) {
 774         flacenc->stopped = TRUE;
 775         FLAC__seekable_stream_encoder_finish (flacenc->encoder);
 776       }
 777       flacenc->negotiated = FALSE;
 778       if (flacenc->first_buf)
 779         gst_buffer_unref (flacenc->first_buf);
 780       flacenc->first_buf = NULL;
 781       g_free (flacenc->data);
 782       flacenc->data = NULL;
 783       if (flacenc->meta) {
 784         FLAC__metadata_object_delete (flacenc->meta[0]);
 785         g_free (flacenc->meta);
 786         flacenc->meta = NULL;
 787       }
 788       break;
 789     case GST_STATE_READY_TO_NULL:
 790     default:
 791       break;
 792   }
 793
 794   if (GST_ELEMENT_CLASS (parent_class)->change_state)
 795     return GST_ELEMENT_CLASS (parent_class)->change_state (element);
 796
 797   return GST_STATE_SUCCESS;
 798 }