2 * Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
3 * Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
22 * SECTION:element-speexdec
23 * @see_also: speexenc, oggdemux
25 * This element decodes a Speex stream to raw integer audio.
26 * <ulink url="http://www.speex.org/">Speex</ulink> is a royalty-free
27 * audio codec maintained by the <ulink url="http://www.xiph.org/">Xiph.org
31 * <title>Example pipelines</title>
33 * gst-launch -v filesrc location=speex.ogg ! oggdemux ! speexdec ! audioconvert ! audioresample ! alsasink
34 * ]| Decode an Ogg/Speex file. To create an Ogg/Speex file refer to the
35 * documentation of speexenc.
38 * Last reviewed on 2006-04-05 (0.10.2)
45 #include "gstspeexdec.h"
48 #include <gst/tag/tag.h>
49 #include <gst/audio/audio.h>
51 GST_DEBUG_CATEGORY_STATIC (speexdec_debug);
52 #define GST_CAT_DEFAULT speexdec_debug
54 #define DEFAULT_ENH TRUE
62 #define FORMAT_STR GST_AUDIO_NE(S16)
64 static GstStaticPadTemplate speex_dec_src_factory =
65 GST_STATIC_PAD_TEMPLATE ("src",
68 GST_STATIC_CAPS ("audio/x-raw, "
69 "format = (string) " FORMAT_STR ", "
70 "layout = (string) interleaved, "
71 "rate = (int) [ 6000, 48000 ], " "channels = (int) [ 1, 2 ]")
74 static GstStaticPadTemplate speex_dec_sink_factory =
75 GST_STATIC_PAD_TEMPLATE ("sink",
78 GST_STATIC_CAPS ("audio/x-speex")
81 #define gst_speex_dec_parent_class parent_class
82 G_DEFINE_TYPE (GstSpeexDec, gst_speex_dec, GST_TYPE_AUDIO_DECODER);
84 static gboolean gst_speex_dec_start (GstAudioDecoder * dec);
85 static gboolean gst_speex_dec_stop (GstAudioDecoder * dec);
86 static gboolean gst_speex_dec_set_format (GstAudioDecoder * bdec,
88 static GstFlowReturn gst_speex_dec_handle_frame (GstAudioDecoder * dec,
91 static void gst_speex_dec_get_property (GObject * object, guint prop_id,
92 GValue * value, GParamSpec * pspec);
93 static void gst_speex_dec_set_property (GObject * object, guint prop_id,
94 const GValue * value, GParamSpec * pspec);
97 gst_speex_dec_class_init (GstSpeexDecClass * klass)
99 GObjectClass *gobject_class;
100 GstElementClass *gstelement_class;
101 GstAudioDecoderClass *base_class;
103 gobject_class = (GObjectClass *) klass;
104 gstelement_class = (GstElementClass *) klass;
105 base_class = (GstAudioDecoderClass *) klass;
107 gobject_class->set_property = gst_speex_dec_set_property;
108 gobject_class->get_property = gst_speex_dec_get_property;
110 base_class->start = GST_DEBUG_FUNCPTR (gst_speex_dec_start);
111 base_class->stop = GST_DEBUG_FUNCPTR (gst_speex_dec_stop);
112 base_class->set_format = GST_DEBUG_FUNCPTR (gst_speex_dec_set_format);
113 base_class->handle_frame = GST_DEBUG_FUNCPTR (gst_speex_dec_handle_frame);
115 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ENH,
116 g_param_spec_boolean ("enh", "Enh", "Enable perceptual enhancement",
117 DEFAULT_ENH, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
119 gst_element_class_add_pad_template (gstelement_class,
120 gst_static_pad_template_get (&speex_dec_src_factory));
121 gst_element_class_add_pad_template (gstelement_class,
122 gst_static_pad_template_get (&speex_dec_sink_factory));
123 gst_element_class_set_details_simple (gstelement_class, "Speex audio decoder",
124 "Codec/Decoder/Audio",
125 "decode speex streams to audio", "Wim Taymans <wim@fluendo.com>");
127 GST_DEBUG_CATEGORY_INIT (speexdec_debug, "speexdec", 0,
128 "speex decoding element");
132 gst_speex_dec_reset (GstSpeexDec * dec)
136 dec->frame_duration = 0;
140 speex_bits_destroy (&dec->bits);
142 gst_buffer_replace (&dec->streamheader, NULL);
143 gst_buffer_replace (&dec->vorbiscomment, NULL);
146 speex_stereo_state_destroy (dec->stereo);
151 speex_decoder_destroy (dec->state);
157 gst_speex_dec_init (GstSpeexDec * dec)
159 dec->enh = DEFAULT_ENH;
161 gst_speex_dec_reset (dec);
165 gst_speex_dec_start (GstAudioDecoder * dec)
167 GstSpeexDec *sd = GST_SPEEX_DEC (dec);
169 GST_DEBUG_OBJECT (dec, "start");
170 gst_speex_dec_reset (sd);
172 /* we know about concealment */
173 gst_audio_decoder_set_plc_aware (dec, TRUE);
179 gst_speex_dec_stop (GstAudioDecoder * dec)
181 GstSpeexDec *sd = GST_SPEEX_DEC (dec);
183 GST_DEBUG_OBJECT (dec, "stop");
184 gst_speex_dec_reset (sd);
190 gst_speex_dec_parse_header (GstSpeexDec * dec, GstBuffer * buf)
194 static const GstAudioChannelPosition chan_pos[2][2] = {
195 {GST_AUDIO_CHANNEL_POSITION_MONO},
196 {GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
197 GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT}
201 gst_buffer_map (buf, &map, GST_MAP_READ);
202 dec->header = speex_packet_to_header ((gchar *) map.data, map.size);
203 gst_buffer_unmap (buf, &map);
208 if (dec->header->mode >= SPEEX_NB_MODES || dec->header->mode < 0)
211 dec->mode = speex_lib_get_mode (dec->header->mode);
213 /* initialize the decoder */
214 dec->state = speex_decoder_init (dec->mode);
218 speex_decoder_ctl (dec->state, SPEEX_SET_ENH, &dec->enh);
219 speex_decoder_ctl (dec->state, SPEEX_GET_FRAME_SIZE, &dec->frame_size);
221 if (dec->header->nb_channels != 1) {
222 dec->stereo = speex_stereo_state_init ();
223 dec->callback.callback_id = SPEEX_INBAND_STEREO;
224 dec->callback.func = speex_std_stereo_request_handler;
225 dec->callback.data = dec->stereo;
226 speex_decoder_ctl (dec->state, SPEEX_SET_HANDLER, &dec->callback);
229 speex_decoder_ctl (dec->state, SPEEX_SET_SAMPLING_RATE, &dec->header->rate);
231 dec->frame_duration = gst_util_uint64_scale_int (dec->frame_size,
232 GST_SECOND, dec->header->rate);
234 speex_bits_init (&dec->bits);
237 gst_audio_info_init (&info);
238 gst_audio_info_set_format (&info,
239 GST_AUDIO_FORMAT_S16,
241 dec->header->nb_channels, chan_pos[dec->header->nb_channels - 1]);
243 if (!gst_audio_decoder_set_output_format (GST_AUDIO_DECODER (dec), &info))
251 GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
252 (NULL), ("couldn't read header"));
253 return GST_FLOW_ERROR;
257 GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
259 ("Mode number %d does not (yet/any longer) exist in this version",
261 return GST_FLOW_ERROR;
265 GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
266 (NULL), ("couldn't initialize decoder"));
267 return GST_FLOW_ERROR;
271 GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
272 (NULL), ("couldn't negotiate format"));
273 return GST_FLOW_NOT_NEGOTIATED;
278 gst_speex_dec_parse_comments (GstSpeexDec * dec, GstBuffer * buf)
281 gchar *ver, *encoder = NULL;
283 list = gst_tag_list_from_vorbiscomment_buffer (buf, NULL, 0, &encoder);
286 GST_WARNING_OBJECT (dec, "couldn't decode comments");
287 list = gst_tag_list_new_empty ();
291 gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
292 GST_TAG_ENCODER, encoder, NULL);
295 gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
296 GST_TAG_AUDIO_CODEC, "Speex", NULL);
298 ver = g_strndup (dec->header->speex_version, SPEEX_HEADER_VERSION_LENGTH);
301 if (ver != NULL && *ver != '\0') {
302 gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
303 GST_TAG_ENCODER_VERSION, ver, NULL);
306 if (dec->header->bitrate > 0) {
307 gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
308 GST_TAG_BITRATE, (guint) dec->header->bitrate, NULL);
311 GST_INFO_OBJECT (dec, "tags: %" GST_PTR_FORMAT, list);
313 gst_pad_push_event (GST_AUDIO_DECODER_SRC_PAD (dec),
314 gst_event_new_tag (list));
323 gst_speex_dec_set_format (GstAudioDecoder * bdec, GstCaps * caps)
325 GstSpeexDec *dec = GST_SPEEX_DEC (bdec);
328 const GValue *streamheader;
330 s = gst_caps_get_structure (caps, 0);
331 if ((streamheader = gst_structure_get_value (s, "streamheader")) &&
332 G_VALUE_HOLDS (streamheader, GST_TYPE_ARRAY) &&
333 gst_value_array_get_size (streamheader) >= 2) {
334 const GValue *header, *vorbiscomment;
336 GstFlowReturn res = GST_FLOW_OK;
338 header = gst_value_array_get_value (streamheader, 0);
339 if (header && G_VALUE_HOLDS (header, GST_TYPE_BUFFER)) {
340 buf = gst_value_get_buffer (header);
341 res = gst_speex_dec_parse_header (dec, buf);
342 if (res != GST_FLOW_OK)
344 gst_buffer_replace (&dec->streamheader, buf);
347 vorbiscomment = gst_value_array_get_value (streamheader, 1);
348 if (vorbiscomment && G_VALUE_HOLDS (vorbiscomment, GST_TYPE_BUFFER)) {
349 buf = gst_value_get_buffer (vorbiscomment);
350 res = gst_speex_dec_parse_comments (dec, buf);
351 if (res != GST_FLOW_OK)
353 gst_buffer_replace (&dec->vorbiscomment, buf);
362 gst_speex_dec_parse_data (GstSpeexDec * dec, GstBuffer * buf)
364 GstFlowReturn res = GST_FLOW_OK;
369 if (!dec->frame_duration)
372 if (G_LIKELY (gst_buffer_get_size (buf))) {
373 /* send data to the bitstream */
374 gst_buffer_map (buf, &map, GST_MAP_READ);
375 speex_bits_read_from (&dec->bits, (gchar *) map.data, map.size);
376 gst_buffer_unmap (buf, &map);
378 fpp = dec->header->frames_per_packet;
381 GST_DEBUG_OBJECT (dec, "received buffer of size %" G_GSIZE_FORMAT
382 ", fpp %d, %d bits", map.size, fpp, speex_bits_remaining (bits));
384 /* FIXME ? actually consider how much concealment is needed */
385 /* concealment data, pass NULL as the bits parameters */
386 GST_DEBUG_OBJECT (dec, "creating concealment data");
387 fpp = dec->header->frames_per_packet;
391 /* now decode each frame, catering for unknown number of them (e.g. rtp) */
392 for (i = 0; i < fpp; i++) {
396 GST_LOG_OBJECT (dec, "decoding frame %d/%d, %d bits remaining", i, fpp,
397 bits ? speex_bits_remaining (bits) : -1);
400 gst_pad_alloc_buffer_and_set_caps (GST_AUDIO_DECODER_SRC_PAD (dec),
401 GST_BUFFER_OFFSET_NONE, dec->frame_size * dec->header->nb_channels * 2,
402 GST_PAD_CAPS (GST_AUDIO_DECODER_SRC_PAD (dec)), &outbuf);
404 if (res != GST_FLOW_OK) {
405 GST_DEBUG_OBJECT (dec, "buf alloc flow: %s", gst_flow_get_name (res));
409 /* FIXME, we can use a bufferpool because we have fixed size buffers. We
410 * could also use an allocator */
412 gst_buffer_new_allocate (NULL,
413 dec->frame_size * dec->header->nb_channels * 2, 0);
415 gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
416 ret = speex_decode_int (dec->state, bits, (spx_int16_t *) map.data);
419 /* uh? end of stream */
420 if (fpp == 0 && speex_bits_remaining (bits) < 8) {
421 /* if we did not know how many frames to expect, then we get this
422 at the end if there are leftover bits to pad to the next byte */
423 GST_DEBUG_OBJECT (dec, "Discarding leftover bits");
425 GST_WARNING_OBJECT (dec, "Unexpected end of stream found");
427 gst_audio_decoder_finish_frame (GST_AUDIO_DECODER (dec), NULL, 1);
428 gst_buffer_unref (outbuf);
429 } else if (ret == -2) {
430 GST_WARNING_OBJECT (dec, "Decoding error: corrupted stream?");
431 gst_audio_decoder_finish_frame (GST_AUDIO_DECODER (dec), NULL, 1);
432 gst_buffer_unref (outbuf);
435 if (bits && speex_bits_remaining (bits) < 0) {
436 GST_WARNING_OBJECT (dec, "Decoding overflow: corrupted stream?");
437 gst_audio_decoder_finish_frame (GST_AUDIO_DECODER (dec), NULL, 1);
438 gst_buffer_unref (outbuf);
440 if (dec->header->nb_channels == 2)
441 speex_decode_stereo_int ((spx_int16_t *) map.data, dec->frame_size,
444 gst_buffer_unmap (outbuf, &map);
446 res = gst_audio_decoder_finish_frame (GST_AUDIO_DECODER (dec), outbuf, 1);
448 if (res != GST_FLOW_OK) {
449 GST_DEBUG_OBJECT (dec, "flow: %s", gst_flow_get_name (res));
459 GST_ELEMENT_ERROR (dec, CORE, NEGOTIATION, (NULL),
460 ("decoder not initialized"));
461 return GST_FLOW_NOT_NEGOTIATED;
466 memcmp_buffers (GstBuffer * buf1, GstBuffer * buf2)
472 size1 = gst_buffer_get_size (buf1);
473 size2 = gst_buffer_get_size (buf2);
478 gst_buffer_map (buf1, &map, GST_MAP_READ);
479 res = gst_buffer_memcmp (buf2, 0, map.data, map.size) == 0;
480 gst_buffer_unmap (buf1, &map);
486 gst_speex_dec_handle_frame (GstAudioDecoder * bdec, GstBuffer * buf)
491 /* no fancy draining */
492 if (G_UNLIKELY (!buf))
495 dec = GST_SPEEX_DEC (bdec);
497 /* If we have the streamheader and vorbiscomment from the caps already
498 * ignore them here */
499 if (dec->streamheader && dec->vorbiscomment) {
500 if (memcmp_buffers (dec->streamheader, buf)) {
501 GST_DEBUG_OBJECT (dec, "found streamheader");
502 gst_audio_decoder_finish_frame (bdec, NULL, 1);
504 } else if (memcmp_buffers (dec->vorbiscomment, buf)) {
505 GST_DEBUG_OBJECT (dec, "found vorbiscomments");
506 gst_audio_decoder_finish_frame (bdec, NULL, 1);
509 res = gst_speex_dec_parse_data (dec, buf);
512 /* Otherwise fall back to packet counting and assume that the
513 * first two packets are the headers. */
514 switch (dec->packetno) {
516 GST_DEBUG_OBJECT (dec, "counted streamheader");
517 res = gst_speex_dec_parse_header (dec, buf);
518 gst_audio_decoder_finish_frame (bdec, NULL, 1);
521 GST_DEBUG_OBJECT (dec, "counted vorbiscomments");
522 res = gst_speex_dec_parse_comments (dec, buf);
523 gst_audio_decoder_finish_frame (bdec, NULL, 1);
527 res = gst_speex_dec_parse_data (dec, buf);
539 gst_speex_dec_get_property (GObject * object, guint prop_id,
540 GValue * value, GParamSpec * pspec)
542 GstSpeexDec *speexdec;
544 speexdec = GST_SPEEX_DEC (object);
548 g_value_set_boolean (value, speexdec->enh);
551 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
557 gst_speex_dec_set_property (GObject * object, guint prop_id,
558 const GValue * value, GParamSpec * pspec)
560 GstSpeexDec *speexdec;
562 speexdec = GST_SPEEX_DEC (object);
566 speexdec->enh = g_value_get_boolean (value);
569 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);