1 /* GStreamer Wavpack plugin
2 * Copyright (c) 2005 Arwed v. Merkatz <v.merkatz@gmx.net>
3 * Copyright (c) 2006 Edward Hervey <bilboed@gmail.com>
4 * Copyright (c) 2006 Sebastian Dröge <slomo@circular-chaos.org>
6 * gstwavpackdec.c: raw Wavpack bitstream decoder
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
25 * SECTION:element-wavpackdec
28 * WavpackDec decodes framed (for example by the WavpackParse element)
29 * Wavpack streams and decodes them to raw audio.
30 * <ulink url="http://www.wavpack.com/">Wavpack</ulink> is an open-source
31 * audio codec that features both lossless and lossy encoding.
32 * <title>Example launch line</title>
35 * gst-launch filesrc location=test.wv ! wavpackparse ! wavpackdec ! audioconvert ! audioresample ! autoaudiosink
37 * This pipeline decodes the Wavpack file test.wv into raw audio buffers and
38 * tries to play it back using an automatically found audio sink.
48 #include <gst/audio/audio.h>
49 #include <gst/audio/multichannel.h>
54 #include <wavpack/wavpack.h>
55 #include "gstwavpackdec.h"
56 #include "gstwavpackcommon.h"
57 #include "gstwavpackstreamreader.h"
60 #define WAVPACK_DEC_MAX_ERRORS 16
62 GST_DEBUG_CATEGORY_STATIC (gst_wavpack_dec_debug);
63 #define GST_CAT_DEFAULT gst_wavpack_dec_debug
65 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
68 GST_STATIC_CAPS ("audio/x-wavpack, "
69 "width = (int) [ 1, 32 ], "
70 "channels = (int) [ 1, 8 ], "
71 "rate = (int) [ 6000, 192000 ], " "framed = (boolean) true")
74 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
77 GST_STATIC_CAPS ("audio/x-raw-int, "
79 "depth = (int) [ 1, 32 ], "
80 "channels = (int) [ 1, 8 ], "
81 "rate = (int) [ 6000, 192000 ], "
82 "endianness = (int) BYTE_ORDER, " "signed = (boolean) true")
85 static GstFlowReturn gst_wavpack_dec_chain (GstPad * pad, GstBuffer * buffer);
86 static gboolean gst_wavpack_dec_sink_set_caps (GstPad * pad, GstCaps * caps);
87 static gboolean gst_wavpack_dec_sink_event (GstPad * pad, GstEvent * event);
88 static void gst_wavpack_dec_finalize (GObject * object);
89 static GstStateChangeReturn gst_wavpack_dec_change_state (GstElement * element,
90 GstStateChange transition);
91 static gboolean gst_wavpack_dec_sink_event (GstPad * pad, GstEvent * event);
92 static void gst_wavpack_dec_post_tags (GstWavpackDec * dec);
94 GST_BOILERPLATE (GstWavpackDec, gst_wavpack_dec, GstElement, GST_TYPE_ELEMENT);
97 gst_wavpack_dec_base_init (gpointer klass)
99 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
101 gst_element_class_add_pad_template (element_class,
102 gst_static_pad_template_get (&src_factory));
103 gst_element_class_add_pad_template (element_class,
104 gst_static_pad_template_get (&sink_factory));
105 gst_element_class_set_details_simple (element_class, "Wavpack audio decoder",
106 "Codec/Decoder/Audio",
107 "Decodes Wavpack audio data",
108 "Arwed v. Merkatz <v.merkatz@gmx.net>, "
109 "Sebastian Dröge <slomo@circular-chaos.org>");
113 gst_wavpack_dec_class_init (GstWavpackDecClass * klass)
115 GObjectClass *gobject_class = (GObjectClass *) klass;
116 GstElementClass *gstelement_class = (GstElementClass *) klass;
118 gstelement_class->change_state =
119 GST_DEBUG_FUNCPTR (gst_wavpack_dec_change_state);
120 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_wavpack_dec_finalize);
124 gst_wavpack_dec_reset (GstWavpackDec * dec)
126 dec->wv_id.buffer = NULL;
127 dec->wv_id.position = dec->wv_id.length = 0;
129 dec->error_count = 0;
132 dec->channel_mask = 0;
133 dec->sample_rate = 0;
136 gst_segment_init (&dec->segment, GST_FORMAT_TIME);
137 dec->next_block_index = 0;
141 gst_wavpack_dec_init (GstWavpackDec * dec, GstWavpackDecClass * gklass)
143 dec->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
144 gst_pad_set_chain_function (dec->sinkpad,
145 GST_DEBUG_FUNCPTR (gst_wavpack_dec_chain));
146 gst_pad_set_setcaps_function (dec->sinkpad,
147 GST_DEBUG_FUNCPTR (gst_wavpack_dec_sink_set_caps));
148 gst_pad_set_event_function (dec->sinkpad,
149 GST_DEBUG_FUNCPTR (gst_wavpack_dec_sink_event));
150 gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
152 dec->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
153 gst_pad_use_fixed_caps (dec->srcpad);
154 gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
157 dec->stream_reader = gst_wavpack_stream_reader_new ();
159 gst_wavpack_dec_reset (dec);
163 gst_wavpack_dec_finalize (GObject * object)
165 GstWavpackDec *dec = GST_WAVPACK_DEC (object);
167 g_free (dec->stream_reader);
168 dec->stream_reader = NULL;
170 G_OBJECT_CLASS (parent_class)->finalize (object);
174 gst_wavpack_dec_sink_set_caps (GstPad * pad, GstCaps * caps)
176 GstWavpackDec *dec = GST_WAVPACK_DEC (gst_pad_get_parent (pad));
177 GstStructure *structure = gst_caps_get_structure (caps, 0);
179 /* Check if we can set the caps here already */
180 if (gst_structure_get_int (structure, "channels", &dec->channels) &&
181 gst_structure_get_int (structure, "rate", &dec->sample_rate) &&
182 gst_structure_get_int (structure, "width", &dec->depth)) {
184 GstAudioChannelPosition *pos;
186 caps = gst_caps_new_simple ("audio/x-raw-int",
187 "rate", G_TYPE_INT, dec->sample_rate,
188 "channels", G_TYPE_INT, dec->channels,
189 "depth", G_TYPE_INT, dec->depth,
190 "width", G_TYPE_INT, 32,
191 "endianness", G_TYPE_INT, G_BYTE_ORDER,
192 "signed", G_TYPE_BOOLEAN, TRUE, NULL);
194 /* If we already have the channel layout set from upstream
196 if (gst_structure_has_field (structure, "channel-positions")) {
197 pos = gst_audio_get_channel_positions (structure);
198 if (pos != NULL && dec->channels > 2) {
199 GstStructure *new_str = gst_caps_get_structure (caps, 0);
201 gst_audio_set_channel_positions (new_str, pos);
203 gst_wavpack_get_channel_mask_from_positions (pos, dec->channels);
210 GST_DEBUG_OBJECT (dec, "setting caps %" GST_PTR_FORMAT, caps);
212 /* should always succeed */
213 gst_pad_set_caps (dec->srcpad, caps);
214 gst_caps_unref (caps);
216 /* send GST_TAG_AUDIO_CODEC and GST_TAG_BITRATE tags before something
217 * is decoded or after the format has changed */
218 gst_wavpack_dec_post_tags (dec);
221 gst_object_unref (dec);
227 gst_wavpack_dec_post_tags (GstWavpackDec * dec)
230 GstFormat format_time = GST_FORMAT_TIME, format_bytes = GST_FORMAT_BYTES;
231 gint64 duration, size;
233 list = gst_tag_list_new ();
235 gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
236 GST_TAG_AUDIO_CODEC, "Wavpack", NULL);
238 /* try to estimate the average bitrate */
239 if (gst_pad_query_peer_duration (dec->sinkpad, &format_bytes, &size) &&
240 gst_pad_query_peer_duration (dec->sinkpad, &format_time, &duration) &&
241 size > 0 && duration > 0) {
244 bitrate = gst_util_uint64_scale (size, 8 * GST_SECOND, duration);
245 gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
246 (guint) bitrate, NULL);
249 gst_element_post_message (GST_ELEMENT (dec),
250 gst_message_new_tag (GST_OBJECT (dec), list));
254 gst_wavpack_dec_chain (GstPad * pad, GstBuffer * buf)
258 GstFlowReturn ret = GST_FLOW_OK;
260 int32_t decoded, unpacked_size;
261 gboolean format_changed;
263 dec = GST_WAVPACK_DEC (GST_PAD_PARENT (pad));
265 /* check input, we only accept framed input with complete chunks */
266 if (GST_BUFFER_SIZE (buf) < sizeof (WavpackHeader))
267 goto input_not_framed;
269 if (!gst_wavpack_read_header (&wph, GST_BUFFER_DATA (buf)))
272 if (GST_BUFFER_SIZE (buf) < wph.ckSize + 4 * 1 + 4)
273 goto input_not_framed;
275 if (!(wph.flags & INITIAL_BLOCK))
276 goto input_not_framed;
278 dec->wv_id.buffer = GST_BUFFER_DATA (buf);
279 dec->wv_id.length = GST_BUFFER_SIZE (buf);
280 dec->wv_id.position = 0;
282 /* create a new wavpack context if there is none yet but if there
283 * was already one (i.e. caps were set on the srcpad) check whether
284 * the new one has the same caps */
288 dec->context = WavpackOpenFileInputEx (dec->stream_reader,
289 &dec->wv_id, NULL, error_msg, OPEN_STREAMING, 0);
292 GST_WARNING ("Couldn't decode buffer: %s", error_msg);
294 if (dec->error_count <= WAVPACK_DEC_MAX_ERRORS) {
295 goto out; /* just return OK for now */
302 g_assert (dec->context != NULL);
304 dec->error_count = 0;
307 (dec->sample_rate != WavpackGetSampleRate (dec->context)) ||
308 (dec->channels != WavpackGetNumChannels (dec->context)) ||
309 (dec->depth != WavpackGetBitsPerSample (dec->context)) ||
310 #ifdef WAVPACK_OLD_API
311 (dec->channel_mask != dec->context->config.channel_mask);
313 (dec->channel_mask != WavpackGetChannelMask (dec->context));
316 if (!GST_PAD_CAPS (dec->srcpad) || format_changed) {
320 dec->sample_rate = WavpackGetSampleRate (dec->context);
321 dec->channels = WavpackGetNumChannels (dec->context);
322 dec->depth = WavpackGetBitsPerSample (dec->context);
324 caps = gst_caps_new_simple ("audio/x-raw-int",
325 "rate", G_TYPE_INT, dec->sample_rate,
326 "channels", G_TYPE_INT, dec->channels,
327 "depth", G_TYPE_INT, dec->depth,
328 "width", G_TYPE_INT, 32,
329 "endianness", G_TYPE_INT, G_BYTE_ORDER,
330 "signed", G_TYPE_BOOLEAN, TRUE, NULL);
332 #ifdef WAVPACK_OLD_API
333 channel_mask = dec->context->config.channel_mask;
335 channel_mask = WavpackGetChannelMask (dec->context);
337 if (channel_mask == 0)
338 channel_mask = gst_wavpack_get_default_channel_mask (dec->channels);
340 dec->channel_mask = channel_mask;
342 /* Only set the channel layout for more than two channels
343 * otherwise things break unfortunately */
344 if (channel_mask != 0 && dec->channels > 2)
345 if (!gst_wavpack_set_channel_layout (caps, channel_mask))
346 GST_WARNING_OBJECT (dec, "Failed to set channel layout");
348 GST_DEBUG_OBJECT (dec, "setting caps %" GST_PTR_FORMAT, caps);
350 /* should always succeed */
351 gst_pad_set_caps (dec->srcpad, caps);
352 gst_caps_unref (caps);
354 /* send GST_TAG_AUDIO_CODEC and GST_TAG_BITRATE tags before something
355 * is decoded or after the format has changed */
356 gst_wavpack_dec_post_tags (dec);
359 /* alloc output buffer */
360 unpacked_size = 4 * wph.block_samples * dec->channels;
361 ret = gst_pad_alloc_buffer (dec->srcpad, GST_BUFFER_OFFSET (buf),
362 unpacked_size, GST_PAD_CAPS (dec->srcpad), &outbuf);
364 if (ret != GST_FLOW_OK)
367 gst_buffer_copy_metadata (outbuf, buf, GST_BUFFER_COPY_TIMESTAMPS);
369 /* If we got a DISCONT buffer forward the flag. Nothing else
370 * has to be done as libwavpack doesn't store state between
372 if (GST_BUFFER_IS_DISCONT (buf) || dec->next_block_index != wph.block_index)
373 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
375 dec->next_block_index = wph.block_index + wph.block_samples;
378 decoded = WavpackUnpackSamples (dec->context,
379 (int32_t *) GST_BUFFER_DATA (outbuf), wph.block_samples);
380 if (decoded != wph.block_samples)
383 if ((outbuf = gst_audio_buffer_clip (outbuf, &dec->segment,
384 dec->sample_rate, 4 * dec->channels))) {
385 GST_LOG_OBJECT (dec, "pushing buffer with time %" GST_TIME_FORMAT,
386 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)));
387 ret = gst_pad_push (dec->srcpad, outbuf);
392 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
393 GST_DEBUG_OBJECT (dec, "flow: %s", gst_flow_get_name (ret));
396 gst_buffer_unref (buf);
403 GST_ELEMENT_ERROR (dec, STREAM, DECODE, (NULL), ("Expected framed input"));
404 gst_buffer_unref (buf);
405 return GST_FLOW_ERROR;
409 GST_ELEMENT_ERROR (dec, STREAM, DECODE, (NULL), ("Invalid wavpack header"));
410 gst_buffer_unref (buf);
411 return GST_FLOW_ERROR;
415 const gchar *reason = "unknown";
418 #ifdef WAVPACK_OLD_API
419 reason = dec->context->error_message;
421 reason = WavpackGetErrorMessage (dec->context);
424 reason = "couldn't create decoder context";
426 GST_ELEMENT_ERROR (dec, STREAM, DECODE, (NULL),
427 ("Failed to decode wavpack stream: %s", reason));
428 gst_buffer_unref (outbuf);
429 gst_buffer_unref (buf);
430 return GST_FLOW_ERROR;
435 gst_wavpack_dec_sink_event (GstPad * pad, GstEvent * event)
437 GstWavpackDec *dec = GST_WAVPACK_DEC (gst_pad_get_parent (pad));
439 GST_LOG_OBJECT (dec, "Received %s event", GST_EVENT_TYPE_NAME (event));
440 switch (GST_EVENT_TYPE (event)) {
441 case GST_EVENT_NEWSEGMENT:{
444 gint64 start, end, base;
447 gst_event_parse_new_segment (event, &is_update, &rate, &fmt, &start,
449 if (fmt == GST_FORMAT_TIME) {
450 GST_DEBUG ("Got NEWSEGMENT event in GST_FORMAT_TIME, passing on (%"
451 GST_TIME_FORMAT " - %" GST_TIME_FORMAT ")", GST_TIME_ARGS (start),
452 GST_TIME_ARGS (end));
453 gst_segment_set_newsegment (&dec->segment, is_update, rate, fmt,
456 gst_segment_init (&dec->segment, GST_FORMAT_TIME);
464 gst_object_unref (dec);
465 return gst_pad_event_default (pad, event);
468 static GstStateChangeReturn
469 gst_wavpack_dec_change_state (GstElement * element, GstStateChange transition)
471 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
472 GstWavpackDec *dec = GST_WAVPACK_DEC (element);
474 switch (transition) {
475 case GST_STATE_CHANGE_NULL_TO_READY:
477 case GST_STATE_CHANGE_READY_TO_PAUSED:
479 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
485 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
487 switch (transition) {
488 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
490 case GST_STATE_CHANGE_PAUSED_TO_READY:
492 WavpackCloseFile (dec->context);
496 gst_wavpack_dec_reset (dec);
498 case GST_STATE_CHANGE_READY_TO_NULL:
508 gst_wavpack_dec_plugin_init (GstPlugin * plugin)
510 if (!gst_element_register (plugin, "wavpackdec",
511 GST_RANK_PRIMARY, GST_TYPE_WAVPACK_DEC))
513 GST_DEBUG_CATEGORY_INIT (gst_wavpack_dec_debug, "wavpack_dec", 0,