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/tag/tag.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, const 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 gst_caps_new_simple ("audio/x-flac", NULL);
 183   /* "rate",            GST_PROPS_INT_RANGE (11025, 48000),
 184    * "channels",        GST_PROPS_INT_RANGE (1, 2), */
 185 }
 186
 187 static GstCaps*
 188 raw_caps_factory (void)
 189 {
 190   return gst_caps_new_simple ("audio/x-raw-int",
 191       "endianness",     G_TYPE_INT, G_BYTE_ORDER,
 192       "signed",         G_TYPE_BOOLEAN, TRUE,
 193       "width",          G_TYPE_INT, 16,
 194       "depth",          G_TYPE_INT, 16,
 195       "rate",           GST_TYPE_INT_RANGE, 11025, 48000,
 196       "channels",       GST_TYPE_INT_RANGE, 1, 2,
 197       NULL);
 198 }
 199
 200 static void
 201 gst_flacenc_base_init (gpointer g_class)
 202 {
 203   GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
 204   GstCaps *raw_caps, *flac_caps;
 205
 206   raw_caps = raw_caps_factory ();
 207   flac_caps = flac_caps_factory ();
 208
 209   sink_template = gst_pad_template_new ("sink", GST_PAD_SINK,
 210                                         GST_PAD_ALWAYS,
 211                                         raw_caps);
 212   src_template = gst_pad_template_new ("src", GST_PAD_SRC,
 213                                        GST_PAD_ALWAYS,
 214                                        flac_caps);
 215   gst_element_class_add_pad_template (element_class, sink_template);
 216   gst_element_class_add_pad_template (element_class, src_template);
 217   gst_element_class_set_details (element_class, &flacenc_details);
 218 }
 219
 220 static void
 221 gst_flacenc_class_init (FlacEncClass *klass)
 222 {
 223   GObjectClass *gobject_class;
 224   GstElementClass *gstelement_class;
 225
 226   gobject_class = (GObjectClass*)klass;
 227   gstelement_class = (GstElementClass*)klass;
 228
 229   parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
 230
 231   /* we have no properties atm so this is a bit silly */
 232   gobject_class->set_property = gst_flacenc_set_property;
 233   gobject_class->get_property = gst_flacenc_get_property;
 234   gobject_class->dispose      = gst_flacenc_dispose;
 235
 236   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QUALITY,
 237     g_param_spec_enum ("quality",
 238                        "Quality",
 239                        "Speed versus compression tradeoff",
 240                        GST_TYPE_FLACENC_QUALITY, DEFAULT_QUALITY, G_PARAM_READWRITE));
 241   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_STREAMABLE_SUBSET,
 242     g_param_spec_boolean ("streamable_subset",
 243                           "Streamable subset",
 244                           "true to limit encoder to generating a Subset stream, else false",
 245                           TRUE, G_PARAM_READWRITE));
 246   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MID_SIDE_STEREO,
 247     g_param_spec_boolean ("mid_side_stereo",
 248                           "Do mid side stereo",
 249                           "Do mid side stereo (only for stereo input)",
 250                           flacenc_params[DEFAULT_QUALITY].mid_side, G_PARAM_READWRITE));
 251   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOOSE_MID_SIDE_STEREO,
 252     g_param_spec_boolean ("loose_mid_side_stereo",
 253                           "Loose mid side stereo",
 254                           "Loose mid side stereo",
 255                           flacenc_params[DEFAULT_QUALITY].loose_mid_side, G_PARAM_READWRITE));
 256   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
 257     g_param_spec_uint ("blocksize",
 258                        "Blocksize",
 259                        "Blocksize in samples",
 260                        FLAC__MIN_BLOCK_SIZE, FLAC__MAX_BLOCK_SIZE,
 261                        flacenc_params[DEFAULT_QUALITY].blocksize, G_PARAM_READWRITE));
 262   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MAX_LPC_ORDER,
 263     g_param_spec_uint ("max_lpc_order",
 264                        "Max LPC order",
 265                        "Max LPC order; 0 => use only fixed predictors",
 266                        0, FLAC__MAX_LPC_ORDER,
 267                        flacenc_params[DEFAULT_QUALITY].max_lpc_order, G_PARAM_READWRITE));
 268   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QLP_COEFF_PRECISION,
 269     g_param_spec_uint ("qlp_coeff_precision",
 270                        "QLP coefficients precision",
 271                        "Precision in bits of quantized linear-predictor coefficients; 0 = automatic",
 272                        0, 32,
 273                        flacenc_params[DEFAULT_QUALITY].qlp_coeff_precision, G_PARAM_READWRITE));
 274   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QLP_COEFF_PREC_SEARCH,
 275     g_param_spec_boolean ("qlp_coeff_prec_search",
 276                           "Do QLP coefficients precision search",
 277                           "false = use qlp_coeff_precision, "
 278                             "true = search around qlp_coeff_precision, take best",
 279                           flacenc_params[DEFAULT_QUALITY].qlp_coeff_prec_search, G_PARAM_READWRITE));
 280   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ESCAPE_CODING,
 281     g_param_spec_boolean ("escape_coding",
 282                           "Do Escape coding",
 283                           "search for escape codes in the entropy coding stage "
 284                             "for slightly better compression",
 285                           flacenc_params[DEFAULT_QUALITY].escape_coding, G_PARAM_READWRITE));
 286   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_EXHAUSTIVE_MODEL_SEARCH,
 287     g_param_spec_boolean ("exhaustive_model_search",
 288                           "Do exhaustive model search",
 289                           "do exhaustive search of LP coefficient quantization (expensive!)",
 290                           flacenc_params[DEFAULT_QUALITY].exhaustive_model_search, G_PARAM_READWRITE));
 291   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MIN_RESIDUAL_PARTITION_ORDER,
 292     g_param_spec_uint ("min_residual_partition_order",
 293                        "Min residual partition order",
 294                        "Min residual partition order (above 4 doesn't usually help much)",
 295                        0, 16,
 296                        flacenc_params[DEFAULT_QUALITY].min_residual_partition_order, G_PARAM_READWRITE));
 297   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MAX_RESIDUAL_PARTITION_ORDER,
 298     g_param_spec_uint ("max_residual_partition_order",
 299                        "Max residual partition order",
 300                        "Max residual partition order (above 4 doesn't usually help much)",
 301                        0, 16,
 302                        flacenc_params[DEFAULT_QUALITY].max_residual_partition_order, G_PARAM_READWRITE));
 303   g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_RICE_PARAMETER_SEARCH_DIST,
 304     g_param_spec_uint ("rice_parameter_search_dist",
 305                        "rice_parameter_search_dist",
 306                        "0 = try only calc'd parameter k; else try all [k-dist..k+dist] "
 307                          "parameters, use best",
 308                        0, FLAC__MAX_RICE_PARTITION_ORDER,
 309                        flacenc_params[DEFAULT_QUALITY].rice_parameter_search_dist, G_PARAM_READWRITE));
 310
 311   gstelement_class->change_state = gst_flacenc_change_state;
 312 }
 313
 314 static void
 315 gst_flacenc_init (FlacEnc *flacenc)
 316 {
 317   flacenc->sinkpad = gst_pad_new_from_template (sink_template, "sink");
 318   gst_element_add_pad(GST_ELEMENT(flacenc),flacenc->sinkpad);
 319   gst_pad_set_chain_function(flacenc->sinkpad,gst_flacenc_chain);
 320   gst_pad_set_link_function (flacenc->sinkpad, gst_flacenc_sinkconnect);
 321
 322   flacenc->srcpad = gst_pad_new_from_template (src_template, "src");
 323   gst_element_add_pad(GST_ELEMENT(flacenc),flacenc->srcpad);
 324
 325   GST_FLAG_SET (flacenc, GST_ELEMENT_EVENT_AWARE);
 326
 327   flacenc->encoder = FLAC__seekable_stream_encoder_new();
 328
 329   flacenc->negotiated = FALSE;
 330   flacenc->first = TRUE;
 331   flacenc->first_buf = NULL;
 332   flacenc->data = NULL;
 333   gst_flacenc_update_quality (flacenc, DEFAULT_QUALITY);
 334   flacenc->tags = gst_tag_list_new ();
 335 }
 336
 337 static void
 338 gst_flacenc_dispose (GObject *object)
 339 {
 340   FlacEnc *flacenc = GST_FLACENC (object);
 341
 342   FLAC__seekable_stream_encoder_delete (flacenc->encoder);
 343
 344   G_OBJECT_CLASS (parent_class)->dispose (object);
 345 }
 346
 347 static GstPadLinkReturn
 348 gst_flacenc_sinkconnect (GstPad *pad, const GstCaps *caps)
 349 {
 350   GstPadLinkReturn ret;
 351   FlacEnc *flacenc;
 352   GstStructure *structure;
 353
 354   flacenc = GST_FLACENC (gst_pad_get_parent (pad));
 355
 356   structure = gst_caps_get_structure (caps, 0);
 357
 358   gst_structure_get_int (structure, "channels", &flacenc->channels);
 359   gst_structure_get_int (structure, "depth", &flacenc->depth);
 360   gst_structure_get_int (structure, "rate", &flacenc->sample_rate);
 361
 362   caps = gst_caps_new_simple ("audio/x-flac",
 363       "channels", G_TYPE_INT, flacenc->channels,
 364       "rate", G_TYPE_INT, flacenc->sample_rate, NULL);
 365   ret = gst_pad_try_set_caps (flacenc->srcpad, caps);
 366   if (ret <= 0) {
 367     return ret;
 368   }
 369
 370   FLAC__seekable_stream_encoder_set_bits_per_sample (flacenc->encoder,
 371                                             flacenc->depth);
 372   FLAC__seekable_stream_encoder_set_sample_rate (flacenc->encoder,
 373                                         flacenc->sample_rate);
 374   FLAC__seekable_stream_encoder_set_channels (flacenc->encoder,
 375                                      flacenc->channels);
 376
 377   flacenc->negotiated = TRUE;
 378
 379   return ret;
 380 }
 381
 382 static gboolean
 383 gst_flacenc_update_quality (FlacEnc *flacenc, gint quality)
 384 {
 385   flacenc->quality = quality;
 386
 387 #define DO_UPDATE(name, val, str)                               \
 388   G_STMT_START {                                                \
 389     if (FLAC__seekable_stream_encoder_get_##name (flacenc->encoder) !=  \
 390         flacenc_params[quality].val) {                          \
 391       FLAC__seekable_stream_encoder_set_##name (flacenc->encoder,       \
 392           flacenc_params[quality].val);                         \
 393       g_object_notify (G_OBJECT (flacenc), str);                \
 394     }                                                           \
 395   } G_STMT_END
 396
 397   g_object_freeze_notify (G_OBJECT (flacenc));
 398
 399   DO_UPDATE (do_mid_side_stereo,           mid_side,                     "mid_side_stereo");
 400   DO_UPDATE (loose_mid_side_stereo,        loose_mid_side,               "loose_mid_side");
 401   DO_UPDATE (blocksize,                    blocksize,                    "blocksize");
 402   DO_UPDATE (max_lpc_order,                max_lpc_order,                "max_lpc_order");
 403   DO_UPDATE (qlp_coeff_precision,          qlp_coeff_precision,          "qlp_coeff_precision");
 404   DO_UPDATE (do_qlp_coeff_prec_search,     qlp_coeff_prec_search,        "qlp_coeff_prec_search");
 405   DO_UPDATE (do_escape_coding,             escape_coding,                "escape_coding");
 406   DO_UPDATE (do_exhaustive_model_search,   exhaustive_model_search,      "exhaustive_model_search");
 407   DO_UPDATE (min_residual_partition_order, min_residual_partition_order, "min_residual_partition_order");
 408   DO_UPDATE (max_residual_partition_order, max_residual_partition_order, "max_residual_partition_order");
 409   DO_UPDATE (rice_parameter_search_dist,   rice_parameter_search_dist,   "rice_parameter_search_dist");
 410
 411 #undef DO_UPDATE
 412
 413   g_object_thaw_notify (G_OBJECT (flacenc));
 414
 415   return TRUE;
 416 }
 417
 418 static FLAC__SeekableStreamEncoderSeekStatus
 419 gst_flacenc_seek_callback (const FLAC__SeekableStreamEncoder *encoder,
 420                            FLAC__uint64 absolute_byte_offset,
 421                            void *client_data)
 422 {
 423 FlacEnc *flacenc;
 424 GstEvent *event;
 425
 426   flacenc = GST_FLACENC (client_data);
 427
 428   if (flacenc->stopped)
 429     return FLAC__STREAM_ENCODER_OK;
 430
 431   event = gst_event_new_seek ((GstSeekType)(int)(GST_FORMAT_BYTES | GST_SEEK_METHOD_SET), absolute_byte_offset);
 432
 433   if (event)
 434     gst_pad_push (flacenc->srcpad, GST_DATA (event));
 435
 436   return  FLAC__STREAM_ENCODER_OK;
 437 }
 438
 439 static FLAC__StreamEncoderWriteStatus
 440 gst_flacenc_write_callback (const FLAC__SeekableStreamEncoder *encoder,
 441                             const FLAC__byte buffer[], unsigned bytes,
 442                             unsigned samples, unsigned current_frame,
 443                             void *client_data)
 444 {
 445   FlacEnc *flacenc;
 446   GstBuffer *outbuf;
 447
 448   flacenc = GST_FLACENC (client_data);
 449
 450   if (flacenc->stopped)
 451     return FLAC__STREAM_ENCODER_OK;
 452
 453   outbuf = gst_buffer_new_and_alloc (bytes);
 454
 455   memcpy (GST_BUFFER_DATA (outbuf), buffer, bytes);
 456
 457   if (flacenc->first) {
 458     flacenc->first_buf = outbuf;
 459     gst_buffer_ref (outbuf);
 460     flacenc->first = FALSE;
 461   }
 462
 463   gst_pad_push (flacenc->srcpad, GST_DATA (outbuf));
 464
 465   return FLAC__STREAM_ENCODER_OK;
 466 }
 467
 468 static void
 469 add_one_tag (const GstTagList *list, const gchar *tag,
 470              gpointer user_data)
 471 {
 472       GList *comments;
 473       GList *it;
 474       FlacEnc *flacenc = GST_FLACENC (user_data);
 475
 476       comments = gst_tag_to_vorbis_comments (list, tag);
 477       for (it = comments; it != NULL; it = it->next) {
 478               FLAC__StreamMetadata_VorbisComment_Entry commment_entry;
 479               commment_entry.length = strlen(it->data);
 480               commment_entry.entry  =  it->data;
 481               FLAC__metadata_object_vorbiscomment_insert_comment (flacenc->meta[0],
 482                                                                   flacenc->meta[0]->data.vorbis_comment.num_comments,
 483                                                                   commment_entry,
 484                                                                   TRUE);
 485               g_free (it->data);
 486       }
 487       g_list_free (comments);
 488 }
 489
 490 static void
 491 gst_flacenc_set_metadata (FlacEnc *flacenc)
 492 {
 493   const GstTagList *user_tags;
 494   GstTagList *copy;
 495
 496   g_return_if_fail (flacenc != NULL);
 497   user_tags = gst_tag_setter_get_list (GST_TAG_SETTER (flacenc));
 498   if ((flacenc->tags == NULL) && (user_tags == NULL)) {
 499     return;
 500   }
 501   copy = gst_tag_list_merge (user_tags, flacenc->tags,
 502                              gst_tag_setter_get_merge_mode (GST_TAG_SETTER (flacenc)));
 503   flacenc->meta = g_malloc (sizeof (FLAC__StreamMetadata **));
 504
 505   flacenc->meta[0] = FLAC__metadata_object_new (FLAC__METADATA_TYPE_VORBIS_COMMENT);
 506   gst_tag_list_foreach (copy, add_one_tag, flacenc);
 507
 508   if (FLAC__seekable_stream_encoder_set_metadata(flacenc->encoder, flacenc->meta, 1) != true)
 509     g_warning ("Dude, i'm already initialized!");
 510   gst_tag_list_free (copy);
 511 }
 512
 513
 514 static void
 515 gst_flacenc_chain (GstPad *pad, GstData *_data)
 516 {
 517   GstBuffer *buf = GST_BUFFER (_data);
 518   FlacEnc *flacenc;
 519   FLAC__int32 *data;
 520   gulong insize;
 521   gint samples, depth;
 522   gulong i;
 523   FLAC__bool res;
 524
 525   g_return_if_fail(buf != NULL);
 526
 527   flacenc = GST_FLACENC (gst_pad_get_parent (pad));
 528
 529   if (GST_IS_EVENT (buf)) {
 530     GstEvent *event = GST_EVENT (buf);
 531
 532     switch (GST_EVENT_TYPE (event)) {
 533       case GST_EVENT_EOS:
 534         FLAC__seekable_stream_encoder_finish(flacenc->encoder);
 535         break;
 536       case GST_EVENT_TAG:
 537         if (flacenc->tags) {
 538           gst_tag_list_insert (flacenc->tags, gst_event_tag_get_list (event),
 539                   GST_TAG_MERGE_REPLACE);
 540         } else {
 541           g_assert_not_reached ();
 542         }
 543         break;
 544       default:
 545         break;
 546     }
 547     gst_pad_event_default (pad, event);
 548     return;
 549   }
 550
 551   if (!flacenc->negotiated) {
 552     GST_ELEMENT_ERROR (flacenc, CORE, NEGOTIATION, NULL,
 553                        ("format wasn't negotiated before chain function"));
 554     return;
 555   }
 556
 557   depth = flacenc->depth;
 558
 559   insize = GST_BUFFER_SIZE (buf);
 560   samples = insize / ((depth+7)>>3);
 561
 562   if (FLAC__seekable_stream_encoder_get_state (flacenc->encoder) ==
 563                   FLAC__SEEKABLE_STREAM_ENCODER_UNINITIALIZED)
 564   {
 565     FLAC__SeekableStreamEncoderState state;
 566
 567     FLAC__seekable_stream_encoder_set_write_callback (flacenc->encoder,
 568                                           gst_flacenc_write_callback);
 569     FLAC__seekable_stream_encoder_set_seek_callback (flacenc->encoder,
 570                                           gst_flacenc_seek_callback);
 571
 572     FLAC__seekable_stream_encoder_set_client_data (flacenc->encoder,
 573                                           flacenc);
 574
 575     gst_flacenc_set_metadata (flacenc);
 576     state = FLAC__seekable_stream_encoder_init (flacenc->encoder);
 577     if (state != FLAC__STREAM_ENCODER_OK) {
 578       GST_ELEMENT_ERROR (flacenc, LIBRARY, INIT, NULL,
 579                          ("could not initialize encoder (wrong parameters?)"));
 580       return;
 581     }
 582   }
 583
 584   /* we keep a pointer in the flacenc struct because we are freeing the data
 585    * after a push opreration that might never return */
 586   data = flacenc->data = g_malloc (samples * sizeof (FLAC__int32));
 587
 588   if (depth == 8) {
 589     gint8 *indata = (gint8 *) GST_BUFFER_DATA (buf);
 590
 591
 592     for (i=0; i<samples; i++) {
 593       data[i] = (FLAC__int32) *indata++;
 594     }
 595   }
 596   else if (depth == 16) {
 597     gint16 *indata = (gint16 *) GST_BUFFER_DATA (buf);
 598
 599     for (i=0; i<samples; i++) {
 600       data[i] = (FLAC__int32) *indata++;
 601     }
 602   }
 603
 604   gst_buffer_unref(buf);
 605
 606   res = FLAC__seekable_stream_encoder_process_interleaved (flacenc->encoder,
 607                               (const FLAC__int32 *) data, samples / flacenc->channels);
 608
 609   g_free (flacenc->data);
 610   flacenc->data = NULL;
 611
 612   if (!res) {
 613     GST_ELEMENT_ERROR (flacenc, STREAM, ENCODE, NULL, NULL);
 614   }
 615 }
 616
 617 static void
 618 gst_flacenc_set_property (GObject *object, guint prop_id,
 619                           const GValue *value, GParamSpec *pspec)
 620 {
 621   FlacEnc *this;
 622
 623   this = (FlacEnc *)object;
 624   switch (prop_id) {
 625     case ARG_QUALITY:
 626       gst_flacenc_update_quality (this, g_value_get_enum (value));
 627       break;
 628     case ARG_STREAMABLE_SUBSET:
 629       FLAC__seekable_stream_encoder_set_streamable_subset (this->encoder,
 630                            g_value_get_boolean (value));
 631       break;
 632     case ARG_MID_SIDE_STEREO:
 633       FLAC__seekable_stream_encoder_set_do_mid_side_stereo (this->encoder,
 634                            g_value_get_boolean (value));
 635       break;
 636     case ARG_LOOSE_MID_SIDE_STEREO:
 637       FLAC__seekable_stream_encoder_set_loose_mid_side_stereo (this->encoder,
 638                            g_value_get_boolean (value));
 639       break;
 640     case ARG_BLOCKSIZE:
 641       FLAC__seekable_stream_encoder_set_blocksize (this->encoder,
 642                            g_value_get_uint (value));
 643       break;
 644     case ARG_MAX_LPC_ORDER:
 645       FLAC__seekable_stream_encoder_set_max_lpc_order (this->encoder,
 646                            g_value_get_uint (value));
 647       break;
 648     case ARG_QLP_COEFF_PRECISION:
 649       FLAC__seekable_stream_encoder_set_qlp_coeff_precision (this->encoder,
 650                            g_value_get_uint (value));
 651       break;
 652     case ARG_QLP_COEFF_PREC_SEARCH:
 653       FLAC__seekable_stream_encoder_set_do_qlp_coeff_prec_search (this->encoder,
 654                            g_value_get_boolean (value));
 655       break;
 656     case ARG_ESCAPE_CODING:
 657       FLAC__seekable_stream_encoder_set_do_escape_coding (this->encoder,
 658                            g_value_get_boolean (value));
 659       break;
 660     case ARG_EXHAUSTIVE_MODEL_SEARCH:
 661       FLAC__seekable_stream_encoder_set_do_exhaustive_model_search (this->encoder,
 662                            g_value_get_boolean (value));
 663       break;
 664     case ARG_MIN_RESIDUAL_PARTITION_ORDER:
 665       FLAC__seekable_stream_encoder_set_min_residual_partition_order (this->encoder,
 666                            g_value_get_uint (value));
 667       break;
 668     case ARG_MAX_RESIDUAL_PARTITION_ORDER:
 669       FLAC__seekable_stream_encoder_set_max_residual_partition_order (this->encoder,
 670                            g_value_get_uint (value));
 671       break;
 672     case ARG_RICE_PARAMETER_SEARCH_DIST:
 673       FLAC__seekable_stream_encoder_set_rice_parameter_search_dist (this->encoder,
 674                                                  g_value_get_uint (value));
 675       break;
 676     default:
 677       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 678       return;
 679   }
 680 }
 681
 682 static void
 683 gst_flacenc_get_property (GObject *object, guint prop_id,
 684                           GValue *value, GParamSpec *pspec)
 685 {
 686   FlacEnc *this;
 687
 688   this = (FlacEnc *)object;
 689
 690   switch (prop_id) {
 691     case ARG_QUALITY:
 692       g_value_set_enum (value, this->quality);
 693       break;
 694     case ARG_STREAMABLE_SUBSET:
 695       g_value_set_boolean (value,
 696               FLAC__seekable_stream_encoder_get_streamable_subset (this->encoder));
 697       break;
 698     case ARG_MID_SIDE_STEREO:
 699       g_value_set_boolean (value,
 700               FLAC__seekable_stream_encoder_get_do_mid_side_stereo (this->encoder));
 701       break;
 702     case ARG_LOOSE_MID_SIDE_STEREO:
 703       g_value_set_boolean (value,
 704               FLAC__seekable_stream_encoder_get_loose_mid_side_stereo (this->encoder));
 705       break;
 706     case ARG_BLOCKSIZE:
 707       g_value_set_uint (value,
 708               FLAC__seekable_stream_encoder_get_blocksize (this->encoder));
 709       break;
 710     case ARG_MAX_LPC_ORDER:
 711       g_value_set_uint (value,
 712               FLAC__seekable_stream_encoder_get_max_lpc_order (this->encoder));
 713       break;
 714     case ARG_QLP_COEFF_PRECISION:
 715       g_value_set_uint (value,
 716               FLAC__seekable_stream_encoder_get_qlp_coeff_precision (this->encoder));
 717       break;
 718     case ARG_QLP_COEFF_PREC_SEARCH:
 719       g_value_set_boolean (value,
 720               FLAC__seekable_stream_encoder_get_do_qlp_coeff_prec_search (this->encoder));
 721       break;
 722     case ARG_ESCAPE_CODING:
 723       g_value_set_boolean (value,
 724               FLAC__seekable_stream_encoder_get_do_escape_coding (this->encoder));
 725       break;
 726     case ARG_EXHAUSTIVE_MODEL_SEARCH:
 727       g_value_set_boolean (value,
 728               FLAC__seekable_stream_encoder_get_do_exhaustive_model_search (this->encoder));
 729       break;
 730     case ARG_MIN_RESIDUAL_PARTITION_ORDER:
 731       g_value_set_uint (value,
 732               FLAC__seekable_stream_encoder_get_min_residual_partition_order (this->encoder));
 733       break;
 734     case ARG_MAX_RESIDUAL_PARTITION_ORDER:
 735       g_value_set_uint (value,
 736               FLAC__seekable_stream_encoder_get_max_residual_partition_order (this->encoder));
 737       break;
 738     case ARG_RICE_PARAMETER_SEARCH_DIST:
 739       g_value_set_uint (value,
 740               FLAC__seekable_stream_encoder_get_rice_parameter_search_dist (this->encoder));
 741       break;
 742     default:
 743       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 744       break;
 745   }
 746 }
 747
 748 static GstElementStateReturn
 749 gst_flacenc_change_state (GstElement *element)
 750 {
 751   FlacEnc *flacenc = GST_FLACENC (element);
 752
 753   switch (GST_STATE_TRANSITION (element)) {
 754     case GST_STATE_NULL_TO_READY:
 755     case GST_STATE_READY_TO_PAUSED:
 756       flacenc->first = TRUE;
 757       flacenc->stopped = FALSE;
 758       break;
 759     case GST_STATE_PAUSED_TO_PLAYING:
 760     case GST_STATE_PLAYING_TO_PAUSED:
 761       break;
 762     case GST_STATE_PAUSED_TO_READY:
 763       if (FLAC__seekable_stream_encoder_get_state (flacenc->encoder) !=
 764                         FLAC__STREAM_ENCODER_UNINITIALIZED) {
 765         flacenc->stopped = TRUE;
 766         FLAC__seekable_stream_encoder_finish (flacenc->encoder);
 767       }
 768       flacenc->negotiated = FALSE;
 769       if (flacenc->first_buf)
 770         gst_buffer_unref (flacenc->first_buf);
 771       flacenc->first_buf = NULL;
 772       g_free (flacenc->data);
 773       flacenc->data = NULL;
 774       if (flacenc->meta) {
 775         FLAC__metadata_object_delete (flacenc->meta[0]);
 776         g_free (flacenc->meta);
 777         flacenc->meta = NULL;
 778       }
 779       break;
 780     case GST_STATE_READY_TO_NULL:
 781     default:
 782       break;
 783   }
 784
 785   if (GST_ELEMENT_CLASS (parent_class)->change_state)
 786     return GST_ELEMENT_CLASS (parent_class)->change_state (element);
 787
 788   return GST_STATE_SUCCESS;
 789 }