2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) <2004> Wim Taymans <wim@fluendo.com>
4 * Copyright (C) <2005> Thomas Vander Stichele <thomas at apestaart dot org>
5 * Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
24 * SECTION:element-lamemp3enc
25 * @see_also: lame, mad, vorbisenc
27 * This element encodes raw integer audio into an MPEG-1 layer 3 (MP3) stream.
28 * Note that <ulink url="http://en.wikipedia.org/wiki/MP3">MP3</ulink> is not
29 * a free format, there are licensing and patent issues to take into
30 * consideration. See <ulink url="http://www.vorbis.com/">Ogg/Vorbis</ulink>
31 * for a royalty free (and often higher quality) alternative.
34 * <title>Output sample rate</title>
35 * If no fixed output sample rate is negotiated on the element's src pad,
36 * the element will choose an optimal sample rate to resample to internally.
37 * For example, a 16-bit 44.1 KHz mono audio stream encoded at 48 kbit will
38 * get resampled to 32 KHz. Use filter caps on the src pad to force a
39 * particular sample rate.
42 * <title>Example pipelines</title>
44 * gst-launch -v audiotestsrc wave=sine num-buffers=100 ! audioconvert ! lamemp3enc ! filesink location=sine.mp3
45 * ]| Encode a test sine signal to MP3.
47 * gst-launch -v alsasrc ! audioconvert ! lamemp3enc target=bitrate bitrate=192 ! filesink location=alsasrc.mp3
48 * ]| Record from a sound card using ALSA and encode to MP3 with an average bitrate of 192kbps
50 * gst-launch -v filesrc location=music.wav ! decodebin ! audioconvert ! audioresample ! lamemp3enc target=quality quality=0 ! id3v2mux ! filesink location=music.mp3
51 * ]| Transcode from a .wav file to MP3 (the id3v2mux element is optional) with best VBR quality
53 * gst-launch -v cdda://5 ! audioconvert ! lamemp3enc target=bitrate cbr=true bitrate=192 ! filesink location=track5.mp3
54 * ]| Encode Audio CD track 5 to MP3 with a constant bitrate of 192kbps
56 * gst-launch -v audiotestsrc num-buffers=10 ! audio/x-raw-int,rate=44100,channels=1 ! lamemp3enc target=bitrate cbr=true bitrate=48 ! filesink location=test.mp3
57 * ]| Encode to a fixed sample rate
68 #include "gstlamemp3enc.h"
69 #include <gst/gst-i18n-plugin.h>
72 #ifndef HAVE_LAME_SET_VBR_QUALITY
73 #define lame_set_VBR_quality(flags,q) lame_set_VBR_q((flags),(int)(q))
76 GST_DEBUG_CATEGORY_STATIC (debug);
77 #define GST_CAT_DEFAULT debug
79 /* elementfactory information */
81 /* LAMEMP3ENC can do MPEG-1, MPEG-2, and MPEG-2.5, so it has 9 possible
82 * sample rates it supports */
83 static GstStaticPadTemplate gst_lamemp3enc_sink_template =
84 GST_STATIC_PAD_TEMPLATE ("sink",
87 GST_STATIC_CAPS ("audio/x-raw-int, "
88 "endianness = (int) " G_STRINGIFY (G_BYTE_ORDER) ", "
89 "signed = (boolean) true, "
92 "rate = (int) { 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 }, "
93 "channels = (int) [ 1, 2 ]")
96 static GstStaticPadTemplate gst_lamemp3enc_src_template =
97 GST_STATIC_PAD_TEMPLATE ("src",
100 GST_STATIC_CAPS ("audio/mpeg, "
101 "mpegversion = (int) 1, "
103 "rate = (int) { 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 }, "
104 "channels = (int) [ 1, 2 ]")
107 /********** Define useful types for non-programmatic interfaces **********/
110 LAMEMP3ENC_TARGET_QUALITY = 0,
111 LAMEMP3ENC_TARGET_BITRATE
114 #define GST_TYPE_LAMEMP3ENC_TARGET (gst_lamemp3enc_target_get_type())
116 gst_lamemp3enc_target_get_type (void)
118 static GType lame_target_type = 0;
119 static GEnumValue lame_targets[] = {
120 {LAMEMP3ENC_TARGET_QUALITY, "Quality", "quality"},
121 {LAMEMP3ENC_TARGET_BITRATE, "Bitrate", "bitrate"},
125 if (!lame_target_type) {
127 g_enum_register_static ("GstLameMP3EncTarget", lame_targets);
129 return lame_target_type;
134 LAMEMP3ENC_ENCODING_ENGINE_QUALITY_FAST = 0,
135 LAMEMP3ENC_ENCODING_ENGINE_QUALITY_STANDARD,
136 LAMEMP3ENC_ENCODING_ENGINE_QUALITY_HIGH
139 #define GST_TYPE_LAMEMP3ENC_ENCODING_ENGINE_QUALITY (gst_lamemp3enc_encoding_engine_quality_get_type())
141 gst_lamemp3enc_encoding_engine_quality_get_type (void)
143 static GType lame_encoding_engine_quality_type = 0;
144 static GEnumValue lame_encoding_engine_quality[] = {
146 {1, "Standard", "standard"},
151 if (!lame_encoding_engine_quality_type) {
152 lame_encoding_engine_quality_type =
153 g_enum_register_static ("GstLameMP3EncEncodingEngineQuality",
154 lame_encoding_engine_quality);
156 return lame_encoding_engine_quality_type;
159 /********** Standard stuff for signals and arguments **********/
168 ARG_ENCODING_ENGINE_QUALITY,
172 #define DEFAULT_TARGET LAMEMP3ENC_TARGET_QUALITY
173 #define DEFAULT_BITRATE 128
174 #define DEFAULT_CBR FALSE
175 #define DEFAULT_QUALITY 4
176 #define DEFAULT_ENCODING_ENGINE_QUALITY LAMEMP3ENC_ENCODING_ENGINE_QUALITY_STANDARD
177 #define DEFAULT_MONO FALSE
179 static void gst_lamemp3enc_base_init (gpointer g_class);
180 static void gst_lamemp3enc_class_init (GstLameMP3EncClass * klass);
181 static void gst_lamemp3enc_init (GstLameMP3Enc * gst_lame);
183 static void gst_lamemp3enc_set_property (GObject * object, guint prop_id,
184 const GValue * value, GParamSpec * pspec);
185 static void gst_lamemp3enc_get_property (GObject * object, guint prop_id,
186 GValue * value, GParamSpec * pspec);
187 static gboolean gst_lamemp3enc_sink_event (GstPad * pad, GstEvent * event);
188 static GstFlowReturn gst_lamemp3enc_chain (GstPad * pad, GstBuffer * buf);
189 static gboolean gst_lamemp3enc_setup (GstLameMP3Enc * lame);
190 static GstStateChangeReturn gst_lamemp3enc_change_state (GstElement * element,
191 GstStateChange transition);
193 static GstElementClass *parent_class = NULL;
196 gst_lamemp3enc_get_type (void)
198 static GType gst_lamemp3enc_type = 0;
200 if (!gst_lamemp3enc_type) {
201 static const GTypeInfo gst_lamemp3enc_info = {
202 sizeof (GstLameMP3EncClass),
203 gst_lamemp3enc_base_init,
205 (GClassInitFunc) gst_lamemp3enc_class_init,
208 sizeof (GstLameMP3Enc),
210 (GInstanceInitFunc) gst_lamemp3enc_init,
212 static const GInterfaceInfo preset_info = {
218 gst_lamemp3enc_type =
219 g_type_register_static (GST_TYPE_ELEMENT, "GstLameMP3Enc",
220 &gst_lamemp3enc_info, 0);
221 g_type_add_interface_static (gst_lamemp3enc_type, GST_TYPE_PRESET,
224 return gst_lamemp3enc_type;
228 gst_lamemp3enc_release_memory (GstLameMP3Enc * lame)
231 lame_close (lame->lgf);
237 gst_lamemp3enc_finalize (GObject * obj)
239 gst_lamemp3enc_release_memory (GST_LAMEMP3ENC (obj));
241 G_OBJECT_CLASS (parent_class)->finalize (obj);
245 gst_lamemp3enc_base_init (gpointer g_class)
247 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
249 gst_element_class_add_pad_template (element_class,
250 gst_static_pad_template_get (&gst_lamemp3enc_src_template));
251 gst_element_class_add_pad_template (element_class,
252 gst_static_pad_template_get (&gst_lamemp3enc_sink_template));
253 gst_element_class_set_details_simple (element_class, "L.A.M.E. mp3 encoder",
254 "Codec/Encoder/Audio",
255 "High-quality free MP3 encoder",
256 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
260 gst_lamemp3enc_class_init (GstLameMP3EncClass * klass)
262 GObjectClass *gobject_class;
263 GstElementClass *gstelement_class;
265 gobject_class = (GObjectClass *) klass;
266 gstelement_class = (GstElementClass *) klass;
268 parent_class = g_type_class_peek_parent (klass);
270 gobject_class->set_property = gst_lamemp3enc_set_property;
271 gobject_class->get_property = gst_lamemp3enc_get_property;
272 gobject_class->finalize = gst_lamemp3enc_finalize;
274 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TARGET,
275 g_param_spec_enum ("target", "Target",
276 "Optimize for quality or bitrate", GST_TYPE_LAMEMP3ENC_TARGET,
277 DEFAULT_TARGET, G_PARAM_READWRITE));
278 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BITRATE,
279 g_param_spec_int ("bitrate", "Bitrate (kb/s)",
280 "Bitrate in kbit/sec (Only valid if target is bitrate, for CBR one "
281 "of 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, "
282 "256 or 320)", 8, 320, DEFAULT_BITRATE, G_PARAM_READWRITE));
283 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CBR,
284 g_param_spec_boolean ("cbr", "CBR", "Enforce constant bitrate encoding "
285 "(Only valid if target is bitrate)", DEFAULT_CBR, G_PARAM_READWRITE));
286 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QUALITY,
287 g_param_spec_float ("quality", "Quality",
288 "VBR Quality from 0 to 10, 0 being the best "
289 "(Only valid if target is quality)", 0.0, 9.999,
290 DEFAULT_QUALITY, G_PARAM_READWRITE));
291 g_object_class_install_property (G_OBJECT_CLASS (klass),
292 ARG_ENCODING_ENGINE_QUALITY, g_param_spec_enum ("encoding-engine-quality",
293 "Encoding Engine Quality", "Quality/speed of the encoding engine, "
294 "this does not affect the bitrate!",
295 GST_TYPE_LAMEMP3ENC_ENCODING_ENGINE_QUALITY,
296 DEFAULT_ENCODING_ENGINE_QUALITY, G_PARAM_READWRITE));
297 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MONO,
298 g_param_spec_boolean ("mono", "Mono", "Enforce mono encoding",
299 DEFAULT_MONO, G_PARAM_READWRITE));
301 gstelement_class->change_state =
302 GST_DEBUG_FUNCPTR (gst_lamemp3enc_change_state);
306 gst_lamemp3enc_src_setcaps (GstPad * pad, GstCaps * caps)
308 GST_DEBUG_OBJECT (pad, "caps: %" GST_PTR_FORMAT, caps);
313 gst_lamemp3enc_sink_setcaps (GstPad * pad, GstCaps * caps)
318 GstStructure *structure;
321 lame = GST_LAMEMP3ENC (GST_PAD_PARENT (pad));
322 structure = gst_caps_get_structure (caps, 0);
324 if (!gst_structure_get_int (structure, "rate", &lame->samplerate))
326 if (!gst_structure_get_int (structure, "channels", &lame->num_channels))
329 GST_DEBUG_OBJECT (lame, "setting up lame");
330 if (!gst_lamemp3enc_setup (lame))
334 out_samplerate = lame_get_out_samplerate (lame->lgf);
335 if (out_samplerate == 0)
336 goto zero_output_rate;
337 if (out_samplerate != lame->samplerate) {
338 GST_WARNING_OBJECT (lame,
339 "output samplerate %d is different from incoming samplerate %d",
340 out_samplerate, lame->samplerate);
343 version = lame_get_version (lame->lgf);
346 else if (version == 1)
348 else if (version == 2)
352 gst_caps_new_simple ("audio/mpeg",
353 "mpegversion", G_TYPE_INT, 1,
354 "mpegaudioversion", G_TYPE_INT, version,
355 "layer", G_TYPE_INT, 3,
356 "channels", G_TYPE_INT, lame->mono ? 1 : lame->num_channels,
357 "rate", G_TYPE_INT, out_samplerate, NULL);
359 /* and use these caps */
360 gst_pad_set_caps (lame->srcpad, othercaps);
361 gst_caps_unref (othercaps);
367 GST_ERROR_OBJECT (lame, "input caps have no sample rate field");
372 GST_ERROR_OBJECT (lame, "input caps have no channels field");
377 GST_ELEMENT_ERROR (lame, LIBRARY, SETTINGS, (NULL),
378 ("LAMEMP3ENC decided on a zero sample rate"));
383 GST_ELEMENT_ERROR (lame, LIBRARY, SETTINGS,
384 (_("Failed to configure LAMEMP3ENC encoder. Check your encoding parameters.")), (NULL));
390 gst_lamemp3enc_init (GstLameMP3Enc * lame)
392 GST_DEBUG_OBJECT (lame, "starting initialization");
395 gst_pad_new_from_static_template (&gst_lamemp3enc_sink_template, "sink");
396 gst_pad_set_event_function (lame->sinkpad,
397 GST_DEBUG_FUNCPTR (gst_lamemp3enc_sink_event));
398 gst_pad_set_chain_function (lame->sinkpad,
399 GST_DEBUG_FUNCPTR (gst_lamemp3enc_chain));
400 gst_pad_set_setcaps_function (lame->sinkpad,
401 GST_DEBUG_FUNCPTR (gst_lamemp3enc_sink_setcaps));
402 gst_element_add_pad (GST_ELEMENT (lame), lame->sinkpad);
405 gst_pad_new_from_static_template (&gst_lamemp3enc_src_template, "src");
406 gst_pad_set_setcaps_function (lame->srcpad,
407 GST_DEBUG_FUNCPTR (gst_lamemp3enc_src_setcaps));
408 gst_element_add_pad (GST_ELEMENT (lame), lame->srcpad);
410 lame->samplerate = 44100;
411 lame->num_channels = 2;
414 /* Set default settings */
415 lame->target = DEFAULT_TARGET;
416 lame->bitrate = DEFAULT_BITRATE;
417 lame->cbr = DEFAULT_CBR;
418 lame->quality = DEFAULT_QUALITY;
419 lame->encoding_engine_quality = DEFAULT_ENCODING_ENGINE_QUALITY;
420 lame->mono = DEFAULT_MONO;
422 GST_DEBUG_OBJECT (lame, "done initializing");
425 /* <php-emulation-mode>three underscores for ___rate is really really really
426 * private as opposed to one underscore<php-emulation-mode> */
427 /* call this MACRO outside of the NULL state so that we have a higher chance
428 * of actually having a pipeline and bus to get the message through */
430 #define CHECK_AND_FIXUP_BITRATE(obj,param,rate) \
432 gint ___rate = rate; \
433 gint maxrate = 320; \
434 gint multiplier = 64; \
437 } else if (rate <= 64) { \
438 maxrate = 64; multiplier = 8; \
439 if ((rate % 8) != 0) ___rate = GST_ROUND_UP_8 (rate); \
440 } else if (rate <= 128) { \
441 maxrate = 128; multiplier = 16; \
442 if ((rate % 16) != 0) ___rate = GST_ROUND_UP_16 (rate); \
443 } else if (rate <= 256) { \
444 maxrate = 256; multiplier = 32; \
445 if ((rate % 32) != 0) ___rate = GST_ROUND_UP_32 (rate); \
446 } else if (rate <= 320) { \
447 maxrate = 320; multiplier = 64; \
448 if ((rate % 64) != 0) ___rate = GST_ROUND_UP_64 (rate); \
450 if (___rate != rate) { \
451 GST_ELEMENT_WARNING (obj, LIBRARY, SETTINGS, \
452 (_("The requested bitrate %d kbit/s for property '%s' " \
454 "The bitrate was changed to %d kbit/s."), rate, \
456 ("A bitrate below %d should be a multiple of %d.", \
457 maxrate, multiplier)); \
463 gst_lamemp3enc_set_property (GObject * object, guint prop_id,
464 const GValue * value, GParamSpec * pspec)
468 lame = GST_LAMEMP3ENC (object);
472 lame->target = g_value_get_enum (value);
475 lame->bitrate = g_value_get_int (value);
478 lame->cbr = g_value_get_boolean (value);
481 lame->quality = g_value_get_float (value);
483 case ARG_ENCODING_ENGINE_QUALITY:
484 lame->encoding_engine_quality = g_value_get_enum (value);
487 lame->mono = g_value_get_boolean (value);
490 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
496 gst_lamemp3enc_get_property (GObject * object, guint prop_id, GValue * value,
501 lame = GST_LAMEMP3ENC (object);
505 g_value_set_enum (value, lame->target);
508 g_value_set_int (value, lame->bitrate);
511 g_value_set_boolean (value, lame->cbr);
514 g_value_set_float (value, lame->quality);
516 case ARG_ENCODING_ENGINE_QUALITY:
517 g_value_set_enum (value, lame->encoding_engine_quality);
520 g_value_set_boolean (value, lame->mono);
523 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
529 gst_lamemp3enc_sink_event (GstPad * pad, GstEvent * event)
534 lame = GST_LAMEMP3ENC (gst_pad_get_parent (pad));
536 switch (GST_EVENT_TYPE (event)) {
538 GST_DEBUG_OBJECT (lame, "handling EOS event");
540 if (lame->lgf != NULL) {
544 buf = gst_buffer_new_and_alloc (7200);
545 size = lame_encode_flush (lame->lgf, GST_BUFFER_DATA (buf), 7200);
547 if (size > 0 && lame->last_flow == GST_FLOW_OK) {
550 duration = gst_util_uint64_scale (size, 8 * GST_SECOND,
551 1000 * lame->bitrate);
553 if (lame->last_ts == GST_CLOCK_TIME_NONE) {
554 lame->last_ts = lame->eos_ts;
555 lame->last_duration = duration;
557 lame->last_duration += duration;
560 GST_BUFFER_TIMESTAMP (buf) = lame->last_ts;
561 GST_BUFFER_DURATION (buf) = lame->last_duration;
562 lame->last_ts = GST_CLOCK_TIME_NONE;
563 GST_BUFFER_SIZE (buf) = size;
564 GST_DEBUG_OBJECT (lame, "pushing final packet of %u bytes", size);
565 gst_buffer_set_caps (buf, GST_PAD_CAPS (lame->srcpad));
566 gst_pad_push (lame->srcpad, buf);
568 GST_DEBUG_OBJECT (lame, "no final packet (size=%d, last_flow=%s)",
569 size, gst_flow_get_name (lame->last_flow));
570 gst_buffer_unref (buf);
574 ret = gst_pad_event_default (pad, event);
577 case GST_EVENT_FLUSH_START:
578 GST_DEBUG_OBJECT (lame, "handling FLUSH start event");
580 ret = gst_pad_push_event (lame->srcpad, event);
582 case GST_EVENT_FLUSH_STOP:
584 guchar *mp3_data = NULL;
585 gint mp3_buffer_size;
587 GST_DEBUG_OBJECT (lame, "handling FLUSH stop event");
590 /* clear buffers if we already have lame set up */
591 mp3_buffer_size = 7200;
592 mp3_data = g_malloc (mp3_buffer_size);
593 lame_encode_flush (lame->lgf, mp3_data, mp3_buffer_size);
597 ret = gst_pad_push_event (lame->srcpad, event);
601 GST_DEBUG_OBJECT (lame, "ignoring TAG event, passing it on");
602 ret = gst_pad_push_event (lame->srcpad, event);
605 ret = gst_pad_event_default (pad, event);
608 gst_object_unref (lame);
613 gst_lamemp3enc_chain (GstPad * pad, GstBuffer * buf)
617 gint mp3_buffer_size, mp3_size;
619 GstFlowReturn result;
624 lame = GST_LAMEMP3ENC (GST_PAD_PARENT (pad));
626 GST_LOG_OBJECT (lame, "entered chain");
631 data = GST_BUFFER_DATA (buf);
632 size = GST_BUFFER_SIZE (buf);
634 num_samples = size / 2;
636 /* allocate space for output */
637 mp3_buffer_size = 1.25 * num_samples + 7200;
638 mp3_data = g_malloc (mp3_buffer_size);
640 /* lame seems to be too stupid to get mono interleaved going */
641 if (lame->num_channels == 1) {
642 mp3_size = lame_encode_buffer (lame->lgf,
644 (short int *) data, num_samples, mp3_data, mp3_buffer_size);
646 mp3_size = lame_encode_buffer_interleaved (lame->lgf,
648 num_samples / lame->num_channels, mp3_data, mp3_buffer_size);
651 GST_LOG_OBJECT (lame, "encoded %d bytes of audio to %d bytes of mp3",
654 duration = gst_util_uint64_scale_int (size, GST_SECOND,
655 2 * lame->samplerate * lame->num_channels);
657 if (GST_BUFFER_DURATION (buf) != GST_CLOCK_TIME_NONE &&
658 GST_BUFFER_DURATION (buf) != duration) {
659 GST_DEBUG_OBJECT (lame, "incoming buffer had incorrect duration %"
660 GST_TIME_FORMAT ", outgoing buffer will have correct duration %"
662 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_TIME_ARGS (duration));
665 if (lame->last_ts == GST_CLOCK_TIME_NONE) {
666 lame->last_ts = GST_BUFFER_TIMESTAMP (buf);
667 lame->last_offs = GST_BUFFER_OFFSET (buf);
668 lame->last_duration = duration;
670 lame->last_duration += duration;
673 gst_buffer_unref (buf);
676 g_warning ("error %d", mp3_size);
682 outbuf = gst_buffer_new ();
683 GST_BUFFER_DATA (outbuf) = mp3_data;
684 GST_BUFFER_MALLOCDATA (outbuf) = mp3_data;
685 GST_BUFFER_SIZE (outbuf) = mp3_size;
686 GST_BUFFER_TIMESTAMP (outbuf) = lame->last_ts;
687 GST_BUFFER_OFFSET (outbuf) = lame->last_offs;
688 GST_BUFFER_DURATION (outbuf) = lame->last_duration;
689 gst_buffer_set_caps (outbuf, GST_PAD_CAPS (lame->srcpad));
691 result = gst_pad_push (lame->srcpad, outbuf);
692 lame->last_flow = result;
693 if (result != GST_FLOW_OK) {
694 GST_DEBUG_OBJECT (lame, "flow return: %s", gst_flow_get_name (result));
697 if (GST_CLOCK_TIME_IS_VALID (lame->last_ts))
698 lame->eos_ts = lame->last_ts + lame->last_duration;
700 lame->eos_ts = GST_CLOCK_TIME_NONE;
701 lame->last_ts = GST_CLOCK_TIME_NONE;
704 result = GST_FLOW_OK;
712 gst_buffer_unref (buf);
713 GST_ELEMENT_ERROR (lame, CORE, NEGOTIATION, (NULL),
714 ("encoder not initialized (input is not audio?)"));
715 return GST_FLOW_ERROR;
719 /* set up the encoder state */
721 gst_lamemp3enc_setup (GstLameMP3Enc * lame)
724 #define CHECK_ERROR(command) G_STMT_START {\
725 if ((command) < 0) { \
726 GST_ERROR_OBJECT (lame, "setup failed: " G_STRINGIFY (command)); \
732 GstCaps *allowed_caps;
734 GST_DEBUG_OBJECT (lame, "starting setup");
736 /* check if we're already setup; if we are, we might want to check
737 * if this initialization is compatible with the previous one */
740 GST_WARNING_OBJECT (lame, "already setup");
744 lame->lgf = lame_init ();
746 if (lame->lgf == NULL)
749 /* copy the parameters over */
750 lame_set_in_samplerate (lame->lgf, lame->samplerate);
752 /* let lame choose default samplerate unless outgoing sample rate is fixed */
753 allowed_caps = gst_pad_get_allowed_caps (lame->srcpad);
755 if (allowed_caps != NULL) {
756 GstStructure *structure;
759 structure = gst_caps_get_structure (allowed_caps, 0);
761 if (gst_structure_get_int (structure, "rate", &samplerate)) {
762 GST_DEBUG_OBJECT (lame, "Setting sample rate to %d as fixed in src caps",
764 lame_set_out_samplerate (lame->lgf, samplerate);
766 GST_DEBUG_OBJECT (lame, "Letting lame choose sample rate");
767 lame_set_out_samplerate (lame->lgf, 0);
769 gst_caps_unref (allowed_caps);
772 GST_DEBUG_OBJECT (lame, "No peer yet, letting lame choose sample rate");
773 lame_set_out_samplerate (lame->lgf, 0);
776 CHECK_ERROR (lame_set_num_channels (lame->lgf, lame->num_channels));
777 CHECK_ERROR (lame_set_bWriteVbrTag (lame->lgf, 0));
779 if (lame->target == LAMEMP3ENC_TARGET_QUALITY) {
780 CHECK_ERROR (lame_set_VBR (lame->lgf, vbr_default));
781 CHECK_ERROR (lame_set_VBR_quality (lame->lgf, lame->quality));
784 CHECK_AND_FIXUP_BITRATE (lame, "bitrate", lame->bitrate);
785 CHECK_ERROR (lame_set_VBR (lame->lgf, vbr_off));
786 CHECK_ERROR (lame_set_brate (lame->lgf, lame->bitrate));
788 CHECK_ERROR (lame_set_VBR (lame->lgf, vbr_abr));
789 CHECK_ERROR (lame_set_VBR_mean_bitrate_kbps (lame->lgf, lame->bitrate));
793 if (lame->encoding_engine_quality == LAMEMP3ENC_ENCODING_ENGINE_QUALITY_FAST)
794 CHECK_ERROR (lame_set_quality (lame->lgf, 7));
795 else if (lame->encoding_engine_quality ==
796 LAMEMP3ENC_ENCODING_ENGINE_QUALITY_HIGH)
797 CHECK_ERROR (lame_set_quality (lame->lgf, 2));
801 CHECK_ERROR (lame_set_mode (lame->lgf, MONO));
803 /* initialize the lame encoder */
804 if ((retval = lame_init_params (lame->lgf)) >= 0) {
806 /* FIXME: it would be nice to print out the mode here */
808 ("lame encoder setup (target %s, quality %f, bitrate %d, %d Hz, %d channels)",
809 (lame->target == LAMEMP3ENC_TARGET_QUALITY) ? "quality" : "bitrate",
810 lame->quality, lame->bitrate, lame->samplerate, lame->num_channels);
812 GST_ERROR_OBJECT (lame, "lame_init_params returned %d", retval);
815 GST_DEBUG_OBJECT (lame, "done with setup");
821 static GstStateChangeReturn
822 gst_lamemp3enc_change_state (GstElement * element, GstStateChange transition)
825 GstStateChangeReturn result;
827 lame = GST_LAMEMP3ENC (element);
829 switch (transition) {
830 case GST_STATE_CHANGE_READY_TO_PAUSED:
831 lame->last_flow = GST_FLOW_OK;
832 lame->last_ts = GST_CLOCK_TIME_NONE;
833 lame->eos_ts = GST_CLOCK_TIME_NONE;
839 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
841 switch (transition) {
842 case GST_STATE_CHANGE_READY_TO_NULL:
843 gst_lamemp3enc_release_memory (lame);
853 gst_lamemp3enc_register (GstPlugin * plugin)
855 GST_DEBUG_CATEGORY_INIT (debug, "lamemp3enc", 0, "lame mp3 encoder");
857 if (!gst_element_register (plugin, "lamemp3enc", GST_RANK_PRIMARY,
858 GST_TYPE_LAMEMP3ENC))