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.
44 #include <gst/audio/audio.h>
49 #include <wavpack/wavpack.h>
50 #include "gstwavpackdec.h"
51 #include "gstwavpackcommon.h"
52 #include "gstwavpackstreamreader.h"
55 #define WAVPACK_DEC_MAX_ERRORS 16
57 GST_DEBUG_CATEGORY_STATIC (gst_wavpack_dec_debug);
58 #define GST_CAT_DEFAULT gst_wavpack_dec_debug
60 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
63 GST_STATIC_CAPS ("audio/x-wavpack, "
64 "width = (int) [ 1, 32 ], "
65 "channels = (int) [ 1, 2 ], "
66 "rate = (int) [ 6000, 192000 ], " "framed = (boolean) true")
69 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
72 GST_STATIC_CAPS ("audio/x-raw-int, "
74 "depth = (int) [ 1, 32 ], "
75 "channels = (int) [ 1, 2 ], "
76 "rate = (int) [ 6000, 192000 ], "
77 "endianness = (int) BYTE_ORDER, " "signed = (boolean) true")
80 static GstFlowReturn gst_wavpack_dec_chain (GstPad * pad, GstBuffer * buffer);
81 static gboolean gst_wavpack_dec_sink_set_caps (GstPad * pad, GstCaps * caps);
82 static gboolean gst_wavpack_dec_sink_event (GstPad * pad, GstEvent * event);
83 static void gst_wavpack_dec_finalize (GObject * object);
84 static GstStateChangeReturn gst_wavpack_dec_change_state (GstElement * element,
85 GstStateChange transition);
86 static gboolean gst_wavpack_dec_sink_event (GstPad * pad, GstEvent * event);
87 static void gst_wavpack_dec_post_tags (GstWavpackDec * dec);
89 GST_BOILERPLATE (GstWavpackDec, gst_wavpack_dec, GstElement, GST_TYPE_ELEMENT);
92 gst_wavpack_dec_base_init (gpointer klass)
94 static const GstElementDetails plugin_details =
95 GST_ELEMENT_DETAILS ("Wavpack audio decoder",
96 "Codec/Decoder/Audio",
97 "Decodes Wavpack audio data",
98 "Arwed v. Merkatz <v.merkatz@gmx.net>, "
99 "Sebastian Dröge <slomo@circular-chaos.org>");
100 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
102 gst_element_class_add_pad_template (element_class,
103 gst_static_pad_template_get (&src_factory));
104 gst_element_class_add_pad_template (element_class,
105 gst_static_pad_template_get (&sink_factory));
106 gst_element_class_set_details (element_class, &plugin_details);
110 gst_wavpack_dec_class_init (GstWavpackDecClass * klass)
112 GObjectClass *gobject_class = (GObjectClass *) klass;
113 GstElementClass *gstelement_class = (GstElementClass *) klass;
115 gstelement_class->change_state =
116 GST_DEBUG_FUNCPTR (gst_wavpack_dec_change_state);
117 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_wavpack_dec_finalize);
121 gst_wavpack_dec_reset (GstWavpackDec * dec)
123 dec->wv_id.buffer = NULL;
124 dec->wv_id.position = dec->wv_id.length = 0;
126 dec->error_count = 0;
129 dec->sample_rate = 0;
132 gst_segment_init (&dec->segment, GST_FORMAT_TIME);
133 dec->next_block_index = 0;
137 gst_wavpack_dec_init (GstWavpackDec * dec, GstWavpackDecClass * gklass)
139 dec->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
140 gst_pad_set_chain_function (dec->sinkpad,
141 GST_DEBUG_FUNCPTR (gst_wavpack_dec_chain));
142 gst_pad_set_setcaps_function (dec->sinkpad,
143 GST_DEBUG_FUNCPTR (gst_wavpack_dec_sink_set_caps));
144 gst_pad_set_event_function (dec->sinkpad,
145 GST_DEBUG_FUNCPTR (gst_wavpack_dec_sink_event));
146 gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
148 dec->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
149 gst_pad_use_fixed_caps (dec->srcpad);
150 gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
153 dec->stream_reader = gst_wavpack_stream_reader_new ();
155 gst_wavpack_dec_reset (dec);
159 gst_wavpack_dec_finalize (GObject * object)
161 GstWavpackDec *dec = GST_WAVPACK_DEC (object);
163 g_free (dec->stream_reader);
164 dec->stream_reader = NULL;
166 G_OBJECT_CLASS (parent_class)->finalize (object);
170 gst_wavpack_dec_sink_set_caps (GstPad * pad, GstCaps * caps)
172 GstWavpackDec *dec = GST_WAVPACK_DEC (gst_pad_get_parent (pad));
173 GstStructure *structure = gst_caps_get_structure (caps, 0);
175 /* Check if we can set the caps here already */
176 if (gst_structure_get_int (structure, "channels", &dec->channels) &&
177 gst_structure_get_int (structure, "rate", &dec->sample_rate) &&
178 gst_structure_get_int (structure, "width", &dec->depth)) {
181 caps = gst_caps_new_simple ("audio/x-raw-int",
182 "rate", G_TYPE_INT, dec->sample_rate,
183 "channels", G_TYPE_INT, dec->channels,
184 "depth", G_TYPE_INT, dec->depth,
185 "width", G_TYPE_INT, 32,
186 "endianness", G_TYPE_INT, G_BYTE_ORDER,
187 "signed", G_TYPE_BOOLEAN, TRUE, NULL);
189 GST_DEBUG_OBJECT (dec, "setting caps %" GST_PTR_FORMAT, caps);
191 /* should always succeed */
192 gst_pad_set_caps (dec->srcpad, caps);
193 gst_caps_unref (caps);
195 /* send GST_TAG_AUDIO_CODEC and GST_TAG_BITRATE tags before something
196 * is decoded or after the format has changed */
197 gst_wavpack_dec_post_tags (dec);
200 gst_object_unref (dec);
206 gst_wavpack_dec_post_tags (GstWavpackDec * dec)
209 GstFormat format_time = GST_FORMAT_TIME, format_bytes = GST_FORMAT_BYTES;
210 gint64 duration, size;
212 list = gst_tag_list_new ();
214 gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
215 GST_TAG_AUDIO_CODEC, "Wavpack", NULL);
217 /* try to estimate the average bitrate */
218 if (gst_pad_query_peer_duration (dec->sinkpad, &format_bytes, &size) &&
219 gst_pad_query_peer_duration (dec->sinkpad, &format_time, &duration) &&
220 size > 0 && duration > 0) {
223 bitrate = gst_util_uint64_scale (size, 8 * GST_SECOND, duration);
224 gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
225 (guint) bitrate, NULL);
228 gst_element_post_message (GST_ELEMENT (dec),
229 gst_message_new_tag (GST_OBJECT (dec), list));
233 gst_wavpack_dec_chain (GstPad * pad, GstBuffer * buf)
237 GstFlowReturn ret = GST_FLOW_OK;
239 int32_t decoded, unpacked_size;
240 gboolean format_changed;
242 dec = GST_WAVPACK_DEC (GST_PAD_PARENT (pad));
244 /* check input, we only accept framed input with complete chunks */
245 if (GST_BUFFER_SIZE (buf) < sizeof (WavpackHeader))
246 goto input_not_framed;
248 if (!gst_wavpack_read_header (&wph, GST_BUFFER_DATA (buf)))
251 if (GST_BUFFER_SIZE (buf) != wph.ckSize + 4 * 1 + 4)
252 goto input_not_framed;
254 dec->wv_id.buffer = GST_BUFFER_DATA (buf);
255 dec->wv_id.length = GST_BUFFER_SIZE (buf);
256 dec->wv_id.position = 0;
258 /* create a new wavpack context if there is none yet but if there
259 * was already one (i.e. caps were set on the srcpad) check whether
260 * the new one has the same caps */
264 dec->context = WavpackOpenFileInputEx (dec->stream_reader,
265 &dec->wv_id, NULL, error_msg, OPEN_STREAMING, 0);
268 GST_WARNING ("Couldn't decode buffer: %s", error_msg);
270 if (dec->error_count <= WAVPACK_DEC_MAX_ERRORS) {
271 goto out; /* just return OK for now */
278 g_assert (dec->context != NULL);
280 dec->error_count = 0;
283 (dec->sample_rate != WavpackGetSampleRate (dec->context)) ||
284 (dec->channels != WavpackGetNumChannels (dec->context)) ||
285 (dec->depth != WavpackGetBitsPerSample (dec->context));
287 if (!GST_PAD_CAPS (dec->srcpad) || format_changed) {
290 dec->sample_rate = WavpackGetSampleRate (dec->context);
291 dec->channels = WavpackGetNumChannels (dec->context);
292 dec->depth = WavpackGetBitsPerSample (dec->context);
294 caps = gst_caps_new_simple ("audio/x-raw-int",
295 "rate", G_TYPE_INT, dec->sample_rate,
296 "channels", G_TYPE_INT, dec->channels,
297 "depth", G_TYPE_INT, dec->depth,
298 "width", G_TYPE_INT, 32,
299 "endianness", G_TYPE_INT, G_BYTE_ORDER,
300 "signed", G_TYPE_BOOLEAN, TRUE, NULL);
302 GST_DEBUG_OBJECT (dec, "setting caps %" GST_PTR_FORMAT, caps);
304 /* should always succeed */
305 gst_pad_set_caps (dec->srcpad, caps);
306 gst_caps_unref (caps);
308 /* send GST_TAG_AUDIO_CODEC and GST_TAG_BITRATE tags before something
309 * is decoded or after the format has changed */
310 gst_wavpack_dec_post_tags (dec);
313 /* alloc output buffer */
314 unpacked_size = 4 * wph.block_samples * dec->channels;
315 ret = gst_pad_alloc_buffer (dec->srcpad, GST_BUFFER_OFFSET (buf),
316 unpacked_size, GST_PAD_CAPS (dec->srcpad), &outbuf);
318 if (ret != GST_FLOW_OK)
321 gst_buffer_copy_metadata (outbuf, buf, GST_BUFFER_COPY_TIMESTAMPS);
323 /* If we got a DISCONT buffer forward the flag. Nothing else
324 * has to be done as libwavpack doesn't store state between
326 if (GST_BUFFER_IS_DISCONT (buf) || dec->next_block_index != wph.block_index)
327 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
329 dec->next_block_index = wph.block_index + wph.block_samples;
332 decoded = WavpackUnpackSamples (dec->context,
333 (int32_t *) GST_BUFFER_DATA (outbuf), wph.block_samples);
334 if (decoded != wph.block_samples)
337 if ((outbuf = gst_audio_buffer_clip (outbuf, &dec->segment,
338 dec->sample_rate, 4 * dec->channels))) {
339 GST_LOG_OBJECT (dec, "pushing buffer with time %" GST_TIME_FORMAT,
340 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)));
341 ret = gst_pad_push (dec->srcpad, outbuf);
346 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
347 GST_DEBUG_OBJECT (dec, "flow: %s", gst_flow_get_name (ret));
350 gst_buffer_unref (buf);
357 GST_ELEMENT_ERROR (dec, STREAM, DECODE, (NULL), ("Expected framed input"));
358 gst_buffer_unref (buf);
359 return GST_FLOW_ERROR;
363 GST_ELEMENT_ERROR (dec, STREAM, DECODE, (NULL), ("Invalid wavpack header"));
364 gst_buffer_unref (buf);
365 return GST_FLOW_ERROR;
369 GST_ELEMENT_ERROR (dec, STREAM, DECODE, (NULL),
370 ("Failed to decode wavpack stream"));
371 gst_buffer_unref (outbuf);
372 gst_buffer_unref (buf);
373 return GST_FLOW_ERROR;
378 gst_wavpack_dec_sink_event (GstPad * pad, GstEvent * event)
380 GstWavpackDec *dec = GST_WAVPACK_DEC (gst_pad_get_parent (pad));
382 GST_LOG_OBJECT (dec, "Received %s event", GST_EVENT_TYPE_NAME (event));
383 switch (GST_EVENT_TYPE (event)) {
384 case GST_EVENT_NEWSEGMENT:{
387 gint64 start, end, base;
390 gst_event_parse_new_segment (event, &is_update, &rate, &fmt, &start,
392 if (fmt == GST_FORMAT_TIME) {
393 GST_DEBUG ("Got NEWSEGMENT event in GST_FORMAT_TIME, passing on (%"
394 GST_TIME_FORMAT " - %" GST_TIME_FORMAT ")", GST_TIME_ARGS (start),
395 GST_TIME_ARGS (end));
396 gst_segment_set_newsegment (&dec->segment, is_update, rate, fmt,
399 gst_segment_init (&dec->segment, GST_FORMAT_TIME);
407 gst_object_unref (dec);
408 return gst_pad_event_default (pad, event);
411 static GstStateChangeReturn
412 gst_wavpack_dec_change_state (GstElement * element, GstStateChange transition)
414 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
415 GstWavpackDec *dec = GST_WAVPACK_DEC (element);
417 switch (transition) {
418 case GST_STATE_CHANGE_NULL_TO_READY:
420 case GST_STATE_CHANGE_READY_TO_PAUSED:
422 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
428 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
430 switch (transition) {
431 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
433 case GST_STATE_CHANGE_PAUSED_TO_READY:
435 WavpackCloseFile (dec->context);
439 gst_wavpack_dec_reset (dec);
441 case GST_STATE_CHANGE_READY_TO_NULL:
451 gst_wavpack_dec_plugin_init (GstPlugin * plugin)
453 if (!gst_element_register (plugin, "wavpackdec",
454 GST_RANK_PRIMARY, GST_TYPE_WAVPACK_DEC))
456 GST_DEBUG_CATEGORY_INIT (gst_wavpack_dec_debug, "wavpack_dec", 0,