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
67 #include "gstlamemp3enc.h"
68 #include <gst/gst-i18n-plugin.h>
71 #ifndef HAVE_LAME_SET_VBR_QUALITY
72 #define lame_set_VBR_quality(flags,q) lame_set_VBR_q((flags),(int)(q))
75 GST_DEBUG_CATEGORY_STATIC (debug);
76 #define GST_CAT_DEFAULT debug
78 /* elementfactory information */
80 /* LAMEMP3ENC can do MPEG-1, MPEG-2, and MPEG-2.5, so it has 9 possible
81 * sample rates it supports */
82 static GstStaticPadTemplate gst_lamemp3enc_sink_template =
83 GST_STATIC_PAD_TEMPLATE ("sink",
86 GST_STATIC_CAPS ("audio/x-raw-int, "
87 "endianness = (int) " G_STRINGIFY (G_BYTE_ORDER) ", "
88 "signed = (boolean) true, "
91 "rate = (int) { 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 }, "
92 "channels = (int) [ 1, 2 ]")
95 static GstStaticPadTemplate gst_lamemp3enc_src_template =
96 GST_STATIC_PAD_TEMPLATE ("src",
99 GST_STATIC_CAPS ("audio/mpeg, "
100 "mpegversion = (int) 1, "
102 "rate = (int) { 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 }, "
103 "channels = (int) [ 1, 2 ]")
106 /********** Define useful types for non-programmatic interfaces **********/
109 LAMEMP3ENC_TARGET_QUALITY = 0,
110 LAMEMP3ENC_TARGET_BITRATE
113 #define GST_TYPE_LAMEMP3ENC_TARGET (gst_lamemp3enc_target_get_type())
115 gst_lamemp3enc_target_get_type (void)
117 static GType lame_target_type = 0;
118 static GEnumValue lame_targets[] = {
119 {LAMEMP3ENC_TARGET_QUALITY, "Quality", "quality"},
120 {LAMEMP3ENC_TARGET_BITRATE, "Bitrate", "bitrate"},
124 if (!lame_target_type) {
126 g_enum_register_static ("GstLameMP3EncTarget", lame_targets);
128 return lame_target_type;
133 LAMEMP3ENC_ENCODING_ENGINE_QUALITY_FAST = 0,
134 LAMEMP3ENC_ENCODING_ENGINE_QUALITY_STANDARD,
135 LAMEMP3ENC_ENCODING_ENGINE_QUALITY_HIGH
138 #define GST_TYPE_LAMEMP3ENC_ENCODING_ENGINE_QUALITY (gst_lamemp3enc_encoding_engine_quality_get_type())
140 gst_lamemp3enc_encoding_engine_quality_get_type (void)
142 static GType lame_encoding_engine_quality_type = 0;
143 static GEnumValue lame_encoding_engine_quality[] = {
145 {1, "Standard", "standard"},
150 if (!lame_encoding_engine_quality_type) {
151 lame_encoding_engine_quality_type =
152 g_enum_register_static ("GstLameMP3EncEncodingEngineQuality",
153 lame_encoding_engine_quality);
155 return lame_encoding_engine_quality_type;
158 /********** Standard stuff for signals and arguments **********/
167 ARG_ENCODING_ENGINE_QUALITY,
171 #define DEFAULT_TARGET LAMEMP3ENC_TARGET_QUALITY
172 #define DEFAULT_BITRATE 128
173 #define DEFAULT_CBR FALSE
174 #define DEFAULT_QUALITY 4
175 #define DEFAULT_ENCODING_ENGINE_QUALITY LAMEMP3ENC_ENCODING_ENGINE_QUALITY_STANDARD
176 #define DEFAULT_MONO FALSE
178 static void gst_lamemp3enc_base_init (gpointer g_class);
179 static void gst_lamemp3enc_class_init (GstLameMP3EncClass * klass);
180 static void gst_lamemp3enc_init (GstLameMP3Enc * gst_lame);
182 static void gst_lamemp3enc_set_property (GObject * object, guint prop_id,
183 const GValue * value, GParamSpec * pspec);
184 static void gst_lamemp3enc_get_property (GObject * object, guint prop_id,
185 GValue * value, GParamSpec * pspec);
186 static gboolean gst_lamemp3enc_sink_event (GstPad * pad, GstEvent * event);
187 static GstFlowReturn gst_lamemp3enc_chain (GstPad * pad, GstBuffer * buf);
188 static gboolean gst_lamemp3enc_setup (GstLameMP3Enc * lame);
189 static GstStateChangeReturn gst_lamemp3enc_change_state (GstElement * element,
190 GstStateChange transition);
192 static GstElementClass *parent_class = NULL;
195 gst_lamemp3enc_get_type (void)
197 static GType gst_lamemp3enc_type = 0;
199 if (!gst_lamemp3enc_type) {
200 static const GTypeInfo gst_lamemp3enc_info = {
201 sizeof (GstLameMP3EncClass),
202 gst_lamemp3enc_base_init,
204 (GClassInitFunc) gst_lamemp3enc_class_init,
207 sizeof (GstLameMP3Enc),
209 (GInstanceInitFunc) gst_lamemp3enc_init,
211 static const GInterfaceInfo preset_info = {
217 gst_lamemp3enc_type =
218 g_type_register_static (GST_TYPE_ELEMENT, "GstLameMP3Enc",
219 &gst_lamemp3enc_info, 0);
220 g_type_add_interface_static (gst_lamemp3enc_type, GST_TYPE_PRESET,
223 return gst_lamemp3enc_type;
227 gst_lamemp3enc_release_memory (GstLameMP3Enc * lame)
230 lame_close (lame->lgf);
236 gst_lamemp3enc_finalize (GObject * obj)
238 gst_lamemp3enc_release_memory (GST_LAMEMP3ENC (obj));
240 G_OBJECT_CLASS (parent_class)->finalize (obj);
244 gst_lamemp3enc_base_init (gpointer g_class)
246 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
248 gst_element_class_add_pad_template (element_class,
249 gst_static_pad_template_get (&gst_lamemp3enc_src_template));
250 gst_element_class_add_pad_template (element_class,
251 gst_static_pad_template_get (&gst_lamemp3enc_sink_template));
252 gst_element_class_set_details_simple (element_class, "L.A.M.E. mp3 encoder",
253 "Codec/Encoder/Audio",
254 "High-quality free MP3 encoder",
255 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
259 gst_lamemp3enc_class_init (GstLameMP3EncClass * klass)
261 GObjectClass *gobject_class;
262 GstElementClass *gstelement_class;
264 gobject_class = (GObjectClass *) klass;
265 gstelement_class = (GstElementClass *) klass;
267 parent_class = g_type_class_peek_parent (klass);
269 gobject_class->set_property = gst_lamemp3enc_set_property;
270 gobject_class->get_property = gst_lamemp3enc_get_property;
271 gobject_class->finalize = gst_lamemp3enc_finalize;
273 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TARGET,
274 g_param_spec_enum ("target", "Target",
275 "Optimize for quality or bitrate", GST_TYPE_LAMEMP3ENC_TARGET,
276 DEFAULT_TARGET, G_PARAM_READWRITE));
277 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BITRATE,
278 g_param_spec_int ("bitrate", "Bitrate (kb/s)",
279 "Bitrate in kbit/sec (8, 16, 24, 32, 40, 48, 56, 64, 80, 96, "
280 "112, 128, 160, 192, 224, 256 or 320)",
281 8, 320, DEFAULT_BITRATE, G_PARAM_READWRITE));
282 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CBR,
283 g_param_spec_boolean ("cbr", "CBR", "Enforce constant bitrate encoding",
284 DEFAULT_CBR, G_PARAM_READWRITE));
285 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QUALITY,
286 g_param_spec_float ("quality", "Quality",
287 "VBR Quality from 0 to 10, 0 being the best", 0.0, 9.999,
288 DEFAULT_QUALITY, G_PARAM_READWRITE));
289 g_object_class_install_property (G_OBJECT_CLASS (klass),
290 ARG_ENCODING_ENGINE_QUALITY, g_param_spec_enum ("encoding-engine-quality",
291 "Encoding Engine Quality", "Quality/speed of the encoding engine, "
292 "this does not affect the bitrate!",
293 GST_TYPE_LAMEMP3ENC_ENCODING_ENGINE_QUALITY,
294 DEFAULT_ENCODING_ENGINE_QUALITY, G_PARAM_READWRITE));
295 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MONO,
296 g_param_spec_boolean ("mono", "Mono", "Enforce mono encoding",
297 DEFAULT_MONO, G_PARAM_READWRITE));
299 gstelement_class->change_state =
300 GST_DEBUG_FUNCPTR (gst_lamemp3enc_change_state);
304 gst_lamemp3enc_src_setcaps (GstPad * pad, GstCaps * caps)
306 GST_DEBUG_OBJECT (pad, "caps: %" GST_PTR_FORMAT, caps);
311 gst_lamemp3enc_sink_setcaps (GstPad * pad, GstCaps * caps)
316 GstStructure *structure;
319 lame = GST_LAMEMP3ENC (GST_PAD_PARENT (pad));
320 structure = gst_caps_get_structure (caps, 0);
322 if (!gst_structure_get_int (structure, "rate", &lame->samplerate))
324 if (!gst_structure_get_int (structure, "channels", &lame->num_channels))
327 GST_DEBUG_OBJECT (lame, "setting up lame");
328 if (!gst_lamemp3enc_setup (lame))
332 out_samplerate = lame_get_out_samplerate (lame->lgf);
333 if (out_samplerate == 0)
334 goto zero_output_rate;
335 if (out_samplerate != lame->samplerate) {
336 GST_WARNING_OBJECT (lame,
337 "output samplerate %d is different from incoming samplerate %d",
338 out_samplerate, lame->samplerate);
341 version = lame_get_version (lame->lgf);
344 else if (version == 1)
346 else if (version == 2)
350 gst_caps_new_simple ("audio/mpeg",
351 "mpegversion", G_TYPE_INT, 1,
352 "mpegaudioversion", G_TYPE_INT, version,
353 "layer", G_TYPE_INT, 3,
354 "channels", G_TYPE_INT, lame->mono ? 1 : lame->num_channels,
355 "rate", G_TYPE_INT, out_samplerate, NULL);
357 /* and use these caps */
358 gst_pad_set_caps (lame->srcpad, othercaps);
359 gst_caps_unref (othercaps);
365 GST_ERROR_OBJECT (lame, "input caps have no sample rate field");
370 GST_ERROR_OBJECT (lame, "input caps have no channels field");
375 GST_ELEMENT_ERROR (lame, LIBRARY, SETTINGS, (NULL),
376 ("LAMEMP3ENC decided on a zero sample rate"));
381 GST_ELEMENT_ERROR (lame, LIBRARY, SETTINGS,
382 (_("Failed to configure LAMEMP3ENC encoder. Check your encoding parameters.")), (NULL));
388 gst_lamemp3enc_init (GstLameMP3Enc * lame)
390 GST_DEBUG_OBJECT (lame, "starting initialization");
393 gst_pad_new_from_static_template (&gst_lamemp3enc_sink_template, "sink");
394 gst_pad_set_event_function (lame->sinkpad,
395 GST_DEBUG_FUNCPTR (gst_lamemp3enc_sink_event));
396 gst_pad_set_chain_function (lame->sinkpad,
397 GST_DEBUG_FUNCPTR (gst_lamemp3enc_chain));
398 gst_pad_set_setcaps_function (lame->sinkpad,
399 GST_DEBUG_FUNCPTR (gst_lamemp3enc_sink_setcaps));
400 gst_element_add_pad (GST_ELEMENT (lame), lame->sinkpad);
403 gst_pad_new_from_static_template (&gst_lamemp3enc_src_template, "src");
404 gst_pad_set_setcaps_function (lame->srcpad,
405 GST_DEBUG_FUNCPTR (gst_lamemp3enc_src_setcaps));
406 gst_element_add_pad (GST_ELEMENT (lame), lame->srcpad);
408 lame->samplerate = 44100;
409 lame->num_channels = 2;
412 /* Set default settings */
413 lame->target = DEFAULT_TARGET;
414 lame->bitrate = DEFAULT_BITRATE;
415 lame->cbr = DEFAULT_CBR;
416 lame->quality = DEFAULT_QUALITY;
417 lame->encoding_engine_quality = DEFAULT_ENCODING_ENGINE_QUALITY;
418 lame->mono = DEFAULT_MONO;
420 GST_DEBUG_OBJECT (lame, "done initializing");
423 /* <php-emulation-mode>three underscores for ___rate is really really really
424 * private as opposed to one underscore<php-emulation-mode> */
425 /* call this MACRO outside of the NULL state so that we have a higher chance
426 * of actually having a pipeline and bus to get the message through */
428 #define CHECK_AND_FIXUP_BITRATE(obj,param,rate) \
430 gint ___rate = rate; \
431 gint maxrate = 320; \
432 gint multiplier = 64; \
435 } else if (rate <= 64) { \
436 maxrate = 64; multiplier = 8; \
437 if ((rate % 8) != 0) ___rate = GST_ROUND_UP_8 (rate); \
438 } else if (rate <= 128) { \
439 maxrate = 128; multiplier = 16; \
440 if ((rate % 16) != 0) ___rate = GST_ROUND_UP_16 (rate); \
441 } else if (rate <= 256) { \
442 maxrate = 256; multiplier = 32; \
443 if ((rate % 32) != 0) ___rate = GST_ROUND_UP_32 (rate); \
444 } else if (rate <= 320) { \
445 maxrate = 320; multiplier = 64; \
446 if ((rate % 64) != 0) ___rate = GST_ROUND_UP_64 (rate); \
448 if (___rate != rate) { \
449 GST_ELEMENT_WARNING (obj, LIBRARY, SETTINGS, \
450 (_("The requested bitrate %d kbit/s for property '%s' " \
452 "The bitrate was changed to %d kbit/s."), rate, \
454 ("A bitrate below %d should be a multiple of %d.", \
455 maxrate, multiplier)); \
461 gst_lamemp3enc_set_property (GObject * object, guint prop_id,
462 const GValue * value, GParamSpec * pspec)
466 lame = GST_LAMEMP3ENC (object);
470 lame->target = g_value_get_enum (value);
473 lame->bitrate = g_value_get_int (value);
476 lame->cbr = g_value_get_boolean (value);
479 lame->quality = g_value_get_float (value);
481 case ARG_ENCODING_ENGINE_QUALITY:
482 lame->encoding_engine_quality = g_value_get_enum (value);
485 lame->mono = g_value_get_boolean (value);
488 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
494 gst_lamemp3enc_get_property (GObject * object, guint prop_id, GValue * value,
499 lame = GST_LAMEMP3ENC (object);
503 g_value_set_enum (value, lame->target);
506 g_value_set_int (value, lame->bitrate);
509 g_value_set_boolean (value, lame->cbr);
512 g_value_set_float (value, lame->quality);
514 case ARG_ENCODING_ENGINE_QUALITY:
515 g_value_set_enum (value, lame->encoding_engine_quality);
518 g_value_set_boolean (value, lame->mono);
521 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
527 gst_lamemp3enc_sink_event (GstPad * pad, GstEvent * event)
532 lame = GST_LAMEMP3ENC (gst_pad_get_parent (pad));
534 switch (GST_EVENT_TYPE (event)) {
536 GST_DEBUG_OBJECT (lame, "handling EOS event");
538 if (lame->lgf != NULL) {
542 buf = gst_buffer_new_and_alloc (7200);
543 size = lame_encode_flush (lame->lgf, GST_BUFFER_DATA (buf), 7200);
545 if (size > 0 && lame->last_flow == GST_FLOW_OK) {
548 duration = gst_util_uint64_scale (size, 8 * GST_SECOND,
549 1000 * lame->bitrate);
551 if (lame->last_ts == GST_CLOCK_TIME_NONE) {
552 lame->last_ts = lame->eos_ts;
553 lame->last_duration = duration;
555 lame->last_duration += duration;
558 GST_BUFFER_TIMESTAMP (buf) = lame->last_ts;
559 GST_BUFFER_DURATION (buf) = lame->last_duration;
560 lame->last_ts = GST_CLOCK_TIME_NONE;
561 GST_BUFFER_SIZE (buf) = size;
562 GST_DEBUG_OBJECT (lame, "pushing final packet of %u bytes", size);
563 gst_buffer_set_caps (buf, GST_PAD_CAPS (lame->srcpad));
564 gst_pad_push (lame->srcpad, buf);
566 GST_DEBUG_OBJECT (lame, "no final packet (size=%d, last_flow=%s)",
567 size, gst_flow_get_name (lame->last_flow));
568 gst_buffer_unref (buf);
572 ret = gst_pad_event_default (pad, event);
575 case GST_EVENT_FLUSH_START:
576 GST_DEBUG_OBJECT (lame, "handling FLUSH start event");
578 ret = gst_pad_push_event (lame->srcpad, event);
580 case GST_EVENT_FLUSH_STOP:
582 guchar *mp3_data = NULL;
583 gint mp3_buffer_size;
585 GST_DEBUG_OBJECT (lame, "handling FLUSH stop event");
588 mp3_buffer_size = 7200;
589 mp3_data = g_malloc (mp3_buffer_size);
590 lame_encode_flush (lame->lgf, mp3_data, mp3_buffer_size);
593 ret = gst_pad_push_event (lame->srcpad, event);
597 GST_DEBUG_OBJECT (lame, "ignoring TAG event, passing it on");
598 ret = gst_pad_push_event (lame->srcpad, event);
601 ret = gst_pad_event_default (pad, event);
604 gst_object_unref (lame);
609 gst_lamemp3enc_chain (GstPad * pad, GstBuffer * buf)
613 gint mp3_buffer_size, mp3_size;
615 GstFlowReturn result;
620 lame = GST_LAMEMP3ENC (GST_PAD_PARENT (pad));
622 GST_LOG_OBJECT (lame, "entered chain");
627 data = GST_BUFFER_DATA (buf);
628 size = GST_BUFFER_SIZE (buf);
630 num_samples = size / 2;
632 /* allocate space for output */
633 mp3_buffer_size = 1.25 * num_samples + 7200;
634 mp3_data = g_malloc (mp3_buffer_size);
636 /* lame seems to be too stupid to get mono interleaved going */
637 if (lame->num_channels == 1) {
638 mp3_size = lame_encode_buffer (lame->lgf,
640 (short int *) data, num_samples, mp3_data, mp3_buffer_size);
642 mp3_size = lame_encode_buffer_interleaved (lame->lgf,
644 num_samples / lame->num_channels, mp3_data, mp3_buffer_size);
647 GST_LOG_OBJECT (lame, "encoded %d bytes of audio to %d bytes of mp3",
650 duration = gst_util_uint64_scale_int (size, GST_SECOND,
651 2 * lame->samplerate * lame->num_channels);
653 if (GST_BUFFER_DURATION (buf) != GST_CLOCK_TIME_NONE &&
654 GST_BUFFER_DURATION (buf) != duration) {
655 GST_DEBUG_OBJECT (lame, "incoming buffer had incorrect duration %"
656 GST_TIME_FORMAT ", outgoing buffer will have correct duration %"
658 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_TIME_ARGS (duration));
661 if (lame->last_ts == GST_CLOCK_TIME_NONE) {
662 lame->last_ts = GST_BUFFER_TIMESTAMP (buf);
663 lame->last_offs = GST_BUFFER_OFFSET (buf);
664 lame->last_duration = duration;
666 lame->last_duration += duration;
669 gst_buffer_unref (buf);
672 g_warning ("error %d", mp3_size);
678 outbuf = gst_buffer_new ();
679 GST_BUFFER_DATA (outbuf) = mp3_data;
680 GST_BUFFER_MALLOCDATA (outbuf) = mp3_data;
681 GST_BUFFER_SIZE (outbuf) = mp3_size;
682 GST_BUFFER_TIMESTAMP (outbuf) = lame->last_ts;
683 GST_BUFFER_OFFSET (outbuf) = lame->last_offs;
684 GST_BUFFER_DURATION (outbuf) = lame->last_duration;
685 gst_buffer_set_caps (outbuf, GST_PAD_CAPS (lame->srcpad));
687 result = gst_pad_push (lame->srcpad, outbuf);
688 lame->last_flow = result;
689 if (result != GST_FLOW_OK) {
690 GST_DEBUG_OBJECT (lame, "flow return: %s", gst_flow_get_name (result));
693 if (GST_CLOCK_TIME_IS_VALID (lame->last_ts))
694 lame->eos_ts = lame->last_ts + lame->last_duration;
696 lame->eos_ts = GST_CLOCK_TIME_NONE;
697 lame->last_ts = GST_CLOCK_TIME_NONE;
700 result = GST_FLOW_OK;
708 gst_buffer_unref (buf);
709 GST_ELEMENT_ERROR (lame, CORE, NEGOTIATION, (NULL),
710 ("encoder not initialized (input is not audio?)"));
711 return GST_FLOW_ERROR;
715 /* set up the encoder state */
717 gst_lamemp3enc_setup (GstLameMP3Enc * lame)
720 #define CHECK_ERROR(command) G_STMT_START {\
721 if ((command) < 0) { \
722 GST_ERROR_OBJECT (lame, "setup failed: " G_STRINGIFY (command)); \
728 GstCaps *allowed_caps;
730 GST_DEBUG_OBJECT (lame, "starting setup");
732 /* check if we're already setup; if we are, we might want to check
733 * if this initialization is compatible with the previous one */
736 GST_WARNING_OBJECT (lame, "already setup");
740 lame->lgf = lame_init ();
742 if (lame->lgf == NULL)
745 /* copy the parameters over */
746 lame_set_in_samplerate (lame->lgf, lame->samplerate);
748 /* let lame choose default samplerate unless outgoing sample rate is fixed */
749 allowed_caps = gst_pad_get_allowed_caps (lame->srcpad);
751 if (allowed_caps != NULL) {
752 GstStructure *structure;
755 structure = gst_caps_get_structure (allowed_caps, 0);
757 if (gst_structure_get_int (structure, "rate", &samplerate)) {
758 GST_DEBUG_OBJECT (lame, "Setting sample rate to %d as fixed in src caps",
760 lame_set_out_samplerate (lame->lgf, samplerate);
762 GST_DEBUG_OBJECT (lame, "Letting lame choose sample rate");
763 lame_set_out_samplerate (lame->lgf, 0);
765 gst_caps_unref (allowed_caps);
768 GST_DEBUG_OBJECT (lame, "No peer yet, letting lame choose sample rate");
769 lame_set_out_samplerate (lame->lgf, 0);
772 CHECK_ERROR (lame_set_num_channels (lame->lgf, lame->num_channels));
774 if (lame->target == LAMEMP3ENC_TARGET_QUALITY) {
775 CHECK_ERROR (lame_set_VBR (lame->lgf, vbr_default));
776 CHECK_ERROR (lame_set_VBR_quality (lame->lgf, lame->quality));
778 CHECK_AND_FIXUP_BITRATE (lame, "bitrate", lame->bitrate);
780 CHECK_ERROR (lame_set_VBR (lame->lgf, vbr_off));
781 CHECK_ERROR (lame_set_brate (lame->lgf, lame->bitrate));
783 CHECK_ERROR (lame_set_VBR (lame->lgf, vbr_abr));
784 CHECK_ERROR (lame_set_VBR_mean_bitrate_kbps (lame->lgf, lame->bitrate));
788 if (lame->encoding_engine_quality == LAMEMP3ENC_ENCODING_ENGINE_QUALITY_FAST)
789 CHECK_ERROR (lame_set_quality (lame->lgf, 7));
790 else if (lame->encoding_engine_quality ==
791 LAMEMP3ENC_ENCODING_ENGINE_QUALITY_HIGH)
792 CHECK_ERROR (lame_set_quality (lame->lgf, 2));
796 CHECK_ERROR (lame_set_mode (lame->lgf, MONO));
798 /* initialize the lame encoder */
799 if ((retval = lame_init_params (lame->lgf)) >= 0) {
801 /* FIXME: it would be nice to print out the mode here */
802 GST_INFO ("lame encoder setup (%d Hz, %d channels)",
803 lame->bitrate, lame->samplerate, lame->num_channels);
805 GST_ERROR_OBJECT (lame, "lame_init_params returned %d", retval);
808 GST_DEBUG_OBJECT (lame, "done with setup");
814 static GstStateChangeReturn
815 gst_lamemp3enc_change_state (GstElement * element, GstStateChange transition)
818 GstStateChangeReturn result;
820 lame = GST_LAMEMP3ENC (element);
822 switch (transition) {
823 case GST_STATE_CHANGE_READY_TO_PAUSED:
824 lame->last_flow = GST_FLOW_OK;
825 lame->last_ts = GST_CLOCK_TIME_NONE;
826 lame->eos_ts = GST_CLOCK_TIME_NONE;
832 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
834 switch (transition) {
835 case GST_STATE_CHANGE_READY_TO_NULL:
836 gst_lamemp3enc_release_memory (lame);
846 gst_lamemp3enc_register (GstPlugin * plugin)
848 GST_DEBUG_CATEGORY_INIT (debug, "lamemp3enc", 0, "lame mp3 encoder");
850 if (!gst_element_register (plugin, "lamemp3enc", GST_RANK_NONE,
851 GST_TYPE_LAMEMP3ENC))