2 * Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
3 * Copyright (C) 2005 Thomas Vander Stichele <thomas at apestaart dot org>
4 * Copyright (C) 2011 Wim Taymans <wim.taymans at gmail dot com>
6 * gstaudioconvert.c: Convert audio to different audio formats automatically
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., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
25 * SECTION:element-audioconvert
27 * Audioconvert converts raw audio buffers between various possible formats.
28 * It supports integer to float conversion, width/depth conversion,
29 * signedness and endianness conversion and channel transformations.
32 * <title>Example launch line</title>
34 * gst-launch -v -m audiotestsrc ! audioconvert ! audio/x-raw,format=S8,channels=2 ! level ! fakesink silent=TRUE
35 * ]| This pipeline converts audio to 8-bit. The level element shows that
36 * the output levels still match the one for a sine wave.
38 * gst-launch -v -m audiotestsrc ! audioconvert ! vorbisenc ! fakesink silent=TRUE
39 * ]| The vorbis encoder takes float audio data instead of the integer data
40 * generated by audiotestsrc.
43 * Last reviewed on 2006-03-02 (0.10.4)
48 * - audioconvert converts buffers in a set of supported caps. If it supports
49 * a caps, it supports conversion from these caps to any other caps it
50 * supports. (example: if it does A=>B and A=>C, it also does B=>C)
51 * - audioconvert does not save state between buffers. Every incoming buffer is
52 * converted and the converted buffer is pushed out.
54 * audioconvert is not supposed to be a one-element-does-anything solution for
64 #include "gstaudioconvert.h"
65 #include "gstchannelmix.h"
66 #include "gstaudioquantize.h"
69 GST_DEBUG_CATEGORY (audio_convert_debug);
70 GST_DEBUG_CATEGORY_STATIC (GST_CAT_PERFORMANCE);
72 /*** DEFINITIONS **************************************************************/
75 static void gst_audio_convert_dispose (GObject * obj);
77 /* gstreamer functions */
78 static gboolean gst_audio_convert_get_unit_size (GstBaseTransform * base,
79 GstCaps * caps, gsize * size);
80 static GstCaps *gst_audio_convert_transform_caps (GstBaseTransform * base,
81 GstPadDirection direction, GstCaps * caps, GstCaps * filter);
82 static GstCaps *gst_audio_convert_fixate_caps (GstBaseTransform * base,
83 GstPadDirection direction, GstCaps * caps, GstCaps * othercaps);
84 static gboolean gst_audio_convert_set_caps (GstBaseTransform * base,
85 GstCaps * incaps, GstCaps * outcaps);
86 static GstFlowReturn gst_audio_convert_transform (GstBaseTransform * base,
87 GstBuffer * inbuf, GstBuffer * outbuf);
88 static void gst_audio_convert_set_property (GObject * object, guint prop_id,
89 const GValue * value, GParamSpec * pspec);
90 static void gst_audio_convert_get_property (GObject * object, guint prop_id,
91 GValue * value, GParamSpec * pspec);
93 /* AudioConvert signals and args */
108 GST_DEBUG_CATEGORY_INIT (audio_convert_debug, "audioconvert", 0, "audio conversion element"); \
109 GST_DEBUG_CATEGORY_GET (GST_CAT_PERFORMANCE, "GST_PERFORMANCE");
110 #define gst_audio_convert_parent_class parent_class
111 G_DEFINE_TYPE_WITH_CODE (GstAudioConvert, gst_audio_convert,
112 GST_TYPE_BASE_TRANSFORM, DEBUG_INIT);
114 /*** GSTREAMER PROTOTYPES *****************************************************/
116 #define STATIC_CAPS \
117 GST_STATIC_CAPS (GST_AUDIO_CAPS_MAKE (GST_AUDIO_FORMATS_ALL) \
118 ", layout = (string) interleaved")
120 static GstStaticPadTemplate gst_audio_convert_src_template =
121 GST_STATIC_PAD_TEMPLATE ("src",
126 static GstStaticPadTemplate gst_audio_convert_sink_template =
127 GST_STATIC_PAD_TEMPLATE ("sink",
132 #define GST_TYPE_AUDIO_CONVERT_DITHERING (gst_audio_convert_dithering_get_type ())
134 gst_audio_convert_dithering_get_type (void)
136 static GType gtype = 0;
139 static const GEnumValue values[] = {
140 {DITHER_NONE, "No dithering",
142 {DITHER_RPDF, "Rectangular dithering", "rpdf"},
143 {DITHER_TPDF, "Triangular dithering (default)", "tpdf"},
144 {DITHER_TPDF_HF, "High frequency triangular dithering", "tpdf-hf"},
148 gtype = g_enum_register_static ("GstAudioConvertDithering", values);
153 #define GST_TYPE_AUDIO_CONVERT_NOISE_SHAPING (gst_audio_convert_ns_get_type ())
155 gst_audio_convert_ns_get_type (void)
157 static GType gtype = 0;
160 static const GEnumValue values[] = {
161 {NOISE_SHAPING_NONE, "No noise shaping (default)",
163 {NOISE_SHAPING_ERROR_FEEDBACK, "Error feedback", "error-feedback"},
164 {NOISE_SHAPING_SIMPLE, "Simple 2-pole noise shaping", "simple"},
165 {NOISE_SHAPING_MEDIUM, "Medium 5-pole noise shaping", "medium"},
166 {NOISE_SHAPING_HIGH, "High 8-pole noise shaping", "high"},
170 gtype = g_enum_register_static ("GstAudioConvertNoiseShaping", values);
176 /*** TYPE FUNCTIONS ***********************************************************/
178 gst_audio_convert_class_init (GstAudioConvertClass * klass)
180 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
181 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
182 GstBaseTransformClass *basetransform_class = GST_BASE_TRANSFORM_CLASS (klass);
184 gobject_class->dispose = gst_audio_convert_dispose;
185 gobject_class->set_property = gst_audio_convert_set_property;
186 gobject_class->get_property = gst_audio_convert_get_property;
188 g_object_class_install_property (gobject_class, ARG_DITHERING,
189 g_param_spec_enum ("dithering", "Dithering",
190 "Selects between different dithering methods.",
191 GST_TYPE_AUDIO_CONVERT_DITHERING, DITHER_TPDF,
192 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
194 g_object_class_install_property (gobject_class, ARG_NOISE_SHAPING,
195 g_param_spec_enum ("noise-shaping", "Noise shaping",
196 "Selects between different noise shaping methods.",
197 GST_TYPE_AUDIO_CONVERT_NOISE_SHAPING, NOISE_SHAPING_NONE,
198 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
200 gst_element_class_add_pad_template (element_class,
201 gst_static_pad_template_get (&gst_audio_convert_src_template));
202 gst_element_class_add_pad_template (element_class,
203 gst_static_pad_template_get (&gst_audio_convert_sink_template));
204 gst_element_class_set_static_metadata (element_class,
205 "Audio converter", "Filter/Converter/Audio",
206 "Convert audio to different formats", "Benjamin Otte <otte@gnome.org>");
208 basetransform_class->get_unit_size =
209 GST_DEBUG_FUNCPTR (gst_audio_convert_get_unit_size);
210 basetransform_class->transform_caps =
211 GST_DEBUG_FUNCPTR (gst_audio_convert_transform_caps);
212 basetransform_class->fixate_caps =
213 GST_DEBUG_FUNCPTR (gst_audio_convert_fixate_caps);
214 basetransform_class->set_caps =
215 GST_DEBUG_FUNCPTR (gst_audio_convert_set_caps);
216 basetransform_class->transform =
217 GST_DEBUG_FUNCPTR (gst_audio_convert_transform);
219 basetransform_class->passthrough_on_same_caps = TRUE;
223 gst_audio_convert_init (GstAudioConvert * this)
225 this->dither = DITHER_TPDF;
226 this->ns = NOISE_SHAPING_NONE;
227 memset (&this->ctx, 0, sizeof (AudioConvertCtx));
229 gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM (this), TRUE);
233 gst_audio_convert_dispose (GObject * obj)
235 GstAudioConvert *this = GST_AUDIO_CONVERT (obj);
237 audio_convert_clean_context (&this->ctx);
239 G_OBJECT_CLASS (parent_class)->dispose (obj);
242 /*** GSTREAMER FUNCTIONS ******************************************************/
244 /* BaseTransform vmethods */
246 gst_audio_convert_get_unit_size (GstBaseTransform * base, GstCaps * caps,
253 if (!gst_audio_info_from_caps (&info, caps))
257 GST_INFO_OBJECT (base, "unit_size = %" G_GSIZE_FORMAT, *size);
263 GST_INFO_OBJECT (base, "failed to parse caps to get unit_size");
268 /* copies the given caps */
270 gst_audio_convert_caps_remove_format_info (GstCaps * caps, gboolean channels)
275 guint64 channel_mask;
277 res = gst_caps_new_empty ();
279 n = gst_caps_get_size (caps);
280 for (i = 0; i < n; i++) {
281 gboolean remove_channels = FALSE;
283 st = gst_caps_get_structure (caps, i);
285 /* If this is already expressed by the existing caps
286 * skip this structure */
287 if (i > 0 && gst_caps_is_subset_structure (res, st))
290 st = gst_structure_copy (st);
291 gst_structure_remove_field (st, "format");
293 /* Only remove the channels and channel-mask for non-NONE layouts */
294 if (gst_structure_get (st, "channel-mask", GST_TYPE_BITMASK, &channel_mask,
296 if (channel_mask != 0)
297 remove_channels = TRUE;
299 remove_channels = TRUE;
302 if (remove_channels && channels)
303 gst_structure_remove_fields (st, "channel-mask", "channels", NULL);
305 gst_caps_append_structure (res, st);
311 /* The caps can be transformed into any other caps with format info removed.
312 * However, we should prefer passthrough, so if passthrough is possible,
313 * put it first in the list. */
315 gst_audio_convert_transform_caps (GstBaseTransform * btrans,
316 GstPadDirection direction, GstCaps * caps, GstCaps * filter)
321 /* Get all possible caps that we can transform to */
322 tmp = gst_audio_convert_caps_remove_format_info (caps, TRUE);
325 tmp2 = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
326 gst_caps_unref (tmp);
332 GST_DEBUG_OBJECT (btrans, "transformed %" GST_PTR_FORMAT " into %"
333 GST_PTR_FORMAT, caps, result);
338 static const GstAudioChannelPosition default_positions[8][8] = {
341 GST_AUDIO_CHANNEL_POSITION_MONO,
345 GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
346 GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
348 /* 3 channels (2.1) */
350 GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
351 GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
352 GST_AUDIO_CHANNEL_POSITION_LFE1,
354 /* 4 channels (4.0) */
356 GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
357 GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
358 GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
359 GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
363 GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
364 GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
365 GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
366 GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
367 GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
369 /* 6 channels (5.1) */
371 GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
372 GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
373 GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
374 GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
375 GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
376 GST_AUDIO_CHANNEL_POSITION_LFE1,
378 /* 7 channels (6.1) */
380 GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
381 GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
382 GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
383 GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
384 GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
385 GST_AUDIO_CHANNEL_POSITION_LFE1,
386 GST_AUDIO_CHANNEL_POSITION_REAR_CENTER,
388 /* 8 channels (7.1) */
390 GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
391 GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
392 GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
393 GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
394 GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
395 GST_AUDIO_CHANNEL_POSITION_LFE1,
396 GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
397 GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
402 n_bits_set (guint64 x)
408 for (i = 0; i < 64; i++) {
418 find_suitable_mask (guint64 mask, gint n_chans)
420 guint64 intersection;
425 g_assert (n_bits_set (mask) >= n_chans);
429 intersection = intersection & ((~G_GUINT64_CONSTANT (0)) >> i);
431 } while (n_bits_set (intersection) > n_chans && i < 64);
439 gst_audio_convert_fixate_format (GstBaseTransform * base, GstStructure * ins,
442 const gchar *in_format;
443 const GValue *format;
444 const GstAudioFormatInfo *in_info, *out_info = NULL;
445 GstAudioFormatFlags in_flags, out_flags;
447 in_format = gst_structure_get_string (ins, "format");
451 format = gst_structure_get_value (outs, "format");
452 /* should not happen */
457 gst_audio_format_get_info (gst_audio_format_from_string (in_format));
461 in_flags = GST_AUDIO_FORMAT_INFO_FLAGS (in_info);
462 in_flags &= ~(GST_AUDIO_FORMAT_FLAG_UNPACK);
463 in_flags &= ~(GST_AUDIO_FORMAT_FLAG_SIGNED);
465 if (GST_VALUE_HOLDS_LIST (format)) {
468 len = gst_value_list_get_size (format);
469 for (i = 0; i < len; i++) {
473 val = gst_value_list_get_value (format, i);
474 if (G_VALUE_HOLDS_STRING (val)) {
475 const GstAudioFormatInfo *t_info;
476 fname = g_value_get_string (val);
478 gst_audio_format_get_info (gst_audio_format_from_string (fname));
481 /* accept input format immediately */
482 if (strcmp (fname, in_format) == 0) {
487 out_flags = GST_AUDIO_FORMAT_INFO_FLAGS (t_info);
488 out_flags &= ~(GST_AUDIO_FORMAT_FLAG_UNPACK);
489 out_flags &= ~(GST_AUDIO_FORMAT_FLAG_SIGNED);
490 /* or another format without losing precision */
491 if (in_flags == out_flags) {
492 if (GST_AUDIO_FORMAT_INFO_DEPTH (t_info) ==
493 GST_AUDIO_FORMAT_INFO_DEPTH (in_info) &&
495 || GST_AUDIO_FORMAT_INFO_DEPTH (out_info) >=
496 GST_AUDIO_FORMAT_INFO_DEPTH (in_info))) {
497 /* exact match of depth, we still continue
498 * to iterate to see if we can get exactly
500 * Only go here if we don't have another
501 * format with the same depth already. We
502 * always take the first to prefer caps
505 } else if ((GST_AUDIO_FORMAT_INFO_DEPTH (t_info) >=
506 GST_AUDIO_FORMAT_INFO_DEPTH (in_info)) && !out_info) {
507 /* match where we do not lose precision. This could
508 * be ok, but keep searching for an exact match.
509 * Only go here if we don't have another format with
510 * a bigger/equal depth already. We always take the
511 * first to prefer caps order. */
518 gst_structure_set (outs, "format", G_TYPE_STRING,
519 GST_AUDIO_FORMAT_INFO_NAME (out_info), NULL);
521 /* nothing to fixate */
527 gst_audio_convert_fixate_channels (GstBaseTransform * base, GstStructure * ins,
530 gint in_chans, out_chans;
531 guint64 in_mask = 0, out_mask = 0;
532 gboolean has_in_mask = FALSE, has_out_mask = FALSE;
534 if (!gst_structure_get_int (ins, "channels", &in_chans))
535 return; /* this shouldn't really happen, should it? */
537 if (!gst_structure_has_field (outs, "channels")) {
538 /* we could try to get the implied number of channels from the layout,
539 * but that seems overdoing it for a somewhat exotic corner case */
540 gst_structure_remove_field (outs, "channel-mask");
544 /* ok, let's fixate the channels if they are not fixated yet */
545 gst_structure_fixate_field_nearest_int (outs, "channels", in_chans);
547 if (!gst_structure_get_int (outs, "channels", &out_chans)) {
548 /* shouldn't really happen ... */
549 gst_structure_remove_field (outs, "channel-mask");
553 /* get the channel layout of the output if any */
554 has_out_mask = gst_structure_has_field (outs, "channel-mask");
556 gst_structure_get (outs, "channel-mask", GST_TYPE_BITMASK, &out_mask, NULL);
558 /* channels == 1 => MONO */
559 if (out_chans == 2) {
561 GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_LEFT) |
562 GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_RIGHT);
564 gst_structure_set (outs, "channel-mask", GST_TYPE_BITMASK, out_mask,
569 /* get the channel layout of the input if any */
570 has_in_mask = gst_structure_has_field (ins, "channel-mask");
572 gst_structure_get (ins, "channel-mask", GST_TYPE_BITMASK, &in_mask, NULL);
574 /* channels == 1 => MONO */
577 GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_LEFT) |
578 GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_RIGHT);
580 } else if (in_chans > 2)
581 g_warning ("%s: Upstream caps contain no channel mask",
582 GST_ELEMENT_NAME (base));
585 if (!has_out_mask && out_chans == 1 && (in_chans != out_chans
587 return; /* nothing to do, default layout will be assumed */
589 if (in_chans == out_chans && (has_in_mask || in_chans == 1)) {
590 /* same number of channels and no output layout: just use input layout */
592 /* in_chans == 1 handled above already */
593 gst_structure_set (outs, "channel-mask", GST_TYPE_BITMASK, in_mask, NULL);
597 /* If both masks are the same we're done, this includes the NONE layout case */
598 if (in_mask == out_mask)
601 /* if output layout is fixed already and looks sane, we're done */
602 if (n_bits_set (out_mask) == out_chans)
605 if (n_bits_set (out_mask) < in_chans) {
606 /* Not much we can do here, this shouldn't just happen */
607 g_warning ("%s: Invalid downstream channel-mask with too few bits set",
608 GST_ELEMENT_NAME (base));
610 guint64 intersection;
612 /* if the output layout is not fixed, check if the output layout contains
613 * the input layout */
614 intersection = in_mask & out_mask;
615 if (n_bits_set (intersection) >= in_chans) {
616 gst_structure_set (outs, "channel-mask", GST_TYPE_BITMASK, in_mask,
621 /* output layout is not fixed and does not contain the input layout, so
622 * just pick the first possibility */
623 intersection = find_suitable_mask (out_mask, out_chans);
625 gst_structure_set (outs, "channel-mask", GST_TYPE_BITMASK, intersection,
631 /* ... else fall back to default layout (NB: out_layout is NULL here) */
632 GST_WARNING_OBJECT (base, "unexpected output channel layout");
634 guint64 intersection;
636 /* number of input channels != number of output channels:
637 * if this value contains a list of channel layouts (or even worse: a list
638 * with another list), just pick the first value and repeat until we find a
639 * channel position array or something else that's not a list; we assume
640 * the input if half-way sane and don't try to fall back on other list items
641 * if the first one is something unexpected or non-channel-pos-array-y */
642 if (n_bits_set (out_mask) >= out_chans) {
643 intersection = find_suitable_mask (out_mask, out_chans);
644 gst_structure_set (outs, "channel-mask", GST_TYPE_BITMASK, intersection,
649 /* what now?! Just ignore what we're given and use default positions */
650 GST_WARNING_OBJECT (base, "invalid or unexpected channel-positions");
653 /* missing or invalid output layout and we can't use the input layout for
654 * one reason or another, so just pick a default layout (we could be smarter
655 * and try to add/remove channels from the input layout, or pick a default
656 * layout based on LFE-presence in input layout, but let's save that for
658 if (out_chans > 0 && out_chans <= G_N_ELEMENTS (default_positions[0])) {
661 GST_DEBUG_OBJECT (base, "using default channel layout as fallback");
664 for (i = 0; i < out_chans; i++)
665 out_mask |= G_GUINT64_CONSTANT (1) << default_positions[out_chans - 1][i];
667 gst_structure_set (outs, "channel-mask", GST_TYPE_BITMASK, out_mask, NULL);
669 GST_ERROR_OBJECT (base, "Have no default layout for %d channels",
674 /* try to keep as many of the structure members the same by fixating the
675 * possible ranges; this way we convert the least amount of things as possible
678 gst_audio_convert_fixate_caps (GstBaseTransform * base,
679 GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
681 GstStructure *ins, *outs;
684 GST_DEBUG_OBJECT (base, "trying to fixate othercaps %" GST_PTR_FORMAT
685 " based on caps %" GST_PTR_FORMAT, othercaps, caps);
687 result = gst_caps_intersect (othercaps, caps);
688 if (gst_caps_is_empty (result)) {
692 gst_caps_unref (result);
693 /* try to preserve channels */
694 removed = gst_audio_convert_caps_remove_format_info (caps, FALSE);
695 result = gst_caps_intersect (othercaps, removed);
696 gst_caps_unref (removed);
697 if (gst_caps_is_empty (result)) {
699 gst_caps_unref (result);
702 gst_caps_unref (othercaps);
705 gst_caps_unref (othercaps);
708 GST_DEBUG_OBJECT (base, "now fixating %" GST_PTR_FORMAT, result);
710 /* fixate remaining fields */
711 result = gst_caps_make_writable (result);
713 ins = gst_caps_get_structure (caps, 0);
714 outs = gst_caps_get_structure (result, 0);
716 gst_audio_convert_fixate_channels (base, ins, outs);
717 gst_audio_convert_fixate_format (base, ins, outs);
719 /* fixate remaining */
720 result = gst_caps_fixate (result);
722 GST_DEBUG_OBJECT (base, "fixated othercaps to %" GST_PTR_FORMAT, result);
728 gst_audio_convert_set_caps (GstBaseTransform * base, GstCaps * incaps,
731 GstAudioConvert *this = GST_AUDIO_CONVERT (base);
732 GstAudioInfo in_info;
733 GstAudioInfo out_info;
735 GST_DEBUG_OBJECT (base, "incaps %" GST_PTR_FORMAT ", outcaps %"
736 GST_PTR_FORMAT, incaps, outcaps);
738 if (!gst_audio_info_from_caps (&in_info, incaps))
740 if (!gst_audio_info_from_caps (&out_info, outcaps))
743 if (!audio_convert_prepare_context (&this->ctx, &in_info, &out_info,
744 this->dither, this->ns))
752 GST_ERROR_OBJECT (base, "invalid input caps");
757 GST_ERROR_OBJECT (base, "invalid output caps");
762 GST_ERROR_OBJECT (base, "could not find converter");
768 gst_audio_convert_transform (GstBaseTransform * base, GstBuffer * inbuf,
772 GstAudioConvert *this = GST_AUDIO_CONVERT (base);
773 GstMapInfo srcmap, dstmap;
774 gint insize, outsize;
778 /* get amount of samples to convert. */
779 samples = gst_buffer_get_size (inbuf) / this->ctx.in.bpf;
781 /* get in/output sizes, to see if the buffers we got are of correct
783 if (!audio_convert_get_sizes (&this->ctx, samples, &insize, &outsize))
786 if (insize == 0 || outsize == 0)
789 /* get src and dst data */
790 gst_buffer_map (inbuf, &srcmap, GST_MAP_READ);
791 gst_buffer_map (outbuf, &dstmap, GST_MAP_WRITE);
793 /* check in and outsize */
794 if (srcmap.size < insize)
796 if (dstmap.size < outsize)
799 /* and convert the samples */
800 if (!GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_GAP)) {
801 if (!audio_convert_convert (&this->ctx, srcmap.data, dstmap.data,
802 samples, gst_buffer_is_writable (inbuf)))
805 /* Create silence buffer */
806 gst_audio_format_fill_silence (this->ctx.out.finfo, dstmap.data, outsize);
811 gst_buffer_unmap (outbuf, &dstmap);
812 gst_buffer_unmap (inbuf, &srcmap);
819 GST_ELEMENT_ERROR (this, STREAM, FORMAT,
820 (NULL), ("cannot get input/output sizes for %d samples", samples));
821 return GST_FLOW_ERROR;
825 GST_ELEMENT_ERROR (this, STREAM, FORMAT,
827 ("input/output buffers are of wrong size in: %" G_GSIZE_FORMAT " < %d"
828 " or out: %" G_GSIZE_FORMAT " < %d",
829 srcmap.size, insize, dstmap.size, outsize));
830 ret = GST_FLOW_ERROR;
835 GST_ELEMENT_ERROR (this, STREAM, FORMAT,
836 (NULL), ("error while converting"));
837 ret = GST_FLOW_ERROR;
843 gst_audio_convert_set_property (GObject * object, guint prop_id,
844 const GValue * value, GParamSpec * pspec)
846 GstAudioConvert *this = GST_AUDIO_CONVERT (object);
850 this->dither = g_value_get_enum (value);
852 case ARG_NOISE_SHAPING:
853 this->ns = g_value_get_enum (value);
856 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
862 gst_audio_convert_get_property (GObject * object, guint prop_id,
863 GValue * value, GParamSpec * pspec)
865 GstAudioConvert *this = GST_AUDIO_CONVERT (object);
869 g_value_set_enum (value, this->dither);
871 case ARG_NOISE_SHAPING:
872 g_value_set_enum (value, this->ns);
875 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);