author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 17 Dec 2009 08:53:32 +0200 | |
changeset 0 | 0e761a78d257 |
child 8 | 4a7fac7dd34a |
permissions | -rw-r--r-- |
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/* GStreamer |
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> |
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* Library <2001> Thomas Vander Stichele <thomas@apestaart.org> |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public |
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* License along with this library; if not, write to the |
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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* Boston, MA 02111-1307, USA. |
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*/ |
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#include <gst/gst.h> |
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#ifndef __GST_AUDIO_AUDIO_H__ |
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#define __GST_AUDIO_AUDIO_H__ |
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G_BEGIN_DECLS |
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/* For people that are looking at this source: the purpose of these defines is |
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* to make GstCaps a bit easier, in that you don't have to know all of the |
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* properties that need to be defined. you can just use these macros. currently |
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* (8/01) the only plugins that use these are the passthrough, speed, volume, |
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* adder, and [de]interleave plugins. These are for convenience only, and do not |
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* specify the 'limits' of GStreamer. you might also use these definitions as a |
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* base for making your own caps, if need be. |
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* |
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* For example, to make a source pad that can output streams of either mono |
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* float or any channel int: |
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* |
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* template = gst_pad_template_new |
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* ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, |
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* gst_caps_append(gst_caps_new ("sink_int", "audio/x-raw-int", |
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* GST_AUDIO_INT_PAD_TEMPLATE_PROPS), |
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* gst_caps_new ("sink_float", "audio/x-raw-float", |
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* GST_AUDIO_FLOAT_PAD_TEMPLATE_PROPS)), |
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* NULL); |
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* |
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* sinkpad = gst_pad_new_from_template(template, "sink"); |
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* |
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* Andy Wingo, 18 August 2001 |
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* Thomas, 6 September 2002 */ |
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/* conversion macros */ |
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/** |
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* GST_FRAMES_TO_CLOCK_TIME: |
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* @frames: sample frames |
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* @rate: sampling rate |
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* |
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* Calculate clocktime from sample @frames and @rate. |
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*/ |
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#define GST_FRAMES_TO_CLOCK_TIME(frames, rate) \ |
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((GstClockTime) gst_util_uint64_scale (frames, GST_SECOND, rate)) |
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/** |
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* GST_CLOCK_TIME_TO_FRAMES: |
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* @clocktime: clock time |
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* @rate: sampling rate |
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* |
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* Calculate frames from @clocktime and sample @rate. |
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*/ |
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#define GST_CLOCK_TIME_TO_FRAMES(clocktime, rate) \ |
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gst_util_uint64_scale (clocktime, rate, GST_SECOND) |
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/** |
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* GST_AUDIO_DEF_RATE: |
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* |
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* Standard sampling rate used in consumer audio. |
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*/ |
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#define GST_AUDIO_DEF_RATE 44100 |
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#define GST_AUDIO_INT_PAD_TEMPLATE_CAPS \ |
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"audio/x-raw-int, " \ |
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"rate = (int) [ 1, MAX ], " \ |
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"channels = (int) [ 1, MAX ], " \ |
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"endianness = (int) { LITTLE_ENDIAN, BIG_ENDIAN }, " \ |
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"width = (int) { 8, 16, 24, 32 }, " \ |
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"depth = (int) [ 1, 32 ], " \ |
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"signed = (boolean) { true, false }" |
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/* "standard" int audio is native order, 16 bit stereo. */ |
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#define GST_AUDIO_INT_STANDARD_PAD_TEMPLATE_CAPS \ |
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"audio/x-raw-int, " \ |
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"rate = (int) [ 1, MAX ], " \ |
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"channels = (int) 2, " \ |
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"endianness = (int) BYTE_ORDER, " \ |
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"width = (int) 16, " \ |
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"depth = (int) 16, " \ |
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"signed = (boolean) true" |
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#define GST_AUDIO_FLOAT_PAD_TEMPLATE_CAPS \ |
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"audio/x-raw-float, " \ |
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"rate = (int) [ 1, MAX ], " \ |
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"channels = (int) [ 1, MAX ], " \ |
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"endianness = (int) { LITTLE_ENDIAN , BIG_ENDIAN }, " \ |
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"width = (int) { 32, 64 }" |
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/* "standard" float audio is native order, 32 bit mono. */ |
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#define GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS \ |
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"audio/x-raw-float, " \ |
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"width = (int) 32, " \ |
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"rate = (int) [ 1, MAX ], " \ |
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"channels = (int) 1, " \ |
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"endianness = (int) BYTE_ORDER" |
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/* |
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* this library defines and implements some helper functions for audio |
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* handling |
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*/ |
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/* get byte size of audio frame (based on caps of pad */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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int gst_audio_frame_byte_size (GstPad* pad); |
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/* get length in frames of buffer */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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long gst_audio_frame_length (GstPad* pad, GstBuffer* buf); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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|
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GstClockTime gst_audio_duration_from_pad_buffer (GstPad * pad, GstBuffer * buf); |
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|
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/* check if the buffer size is a whole multiple of the frame size */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_audio_is_buffer_framed (GstPad* pad, GstBuffer* buf); |
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|
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/* functions useful for _getcaps functions */ |
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/** |
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* GstAudioFieldFlag: |
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* |
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* Do not use anymore. |
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* |
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* Deprecated: use gst_structure_set() directly |
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*/ |
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#ifndef GST_DISABLE_DEPRECATED |
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typedef enum { |
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GST_AUDIO_FIELD_RATE = (1 << 0), |
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GST_AUDIO_FIELD_CHANNELS = (1 << 1), |
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GST_AUDIO_FIELD_ENDIANNESS = (1 << 2), |
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GST_AUDIO_FIELD_WIDTH = (1 << 3), |
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GST_AUDIO_FIELD_DEPTH = (1 << 4), |
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GST_AUDIO_FIELD_SIGNED = (1 << 5), |
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} GstAudioFieldFlag; |
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#endif |
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|
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#ifndef GST_DISABLE_DEPRECATED |
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void gst_audio_structure_set_int (GstStructure *structure, GstAudioFieldFlag flag); |
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#endif /* GST_DISABLE_DEPRECATED */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstBuffer *gst_audio_buffer_clip (GstBuffer *buffer, GstSegment *segment, gint rate, gint frame_size); |
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G_END_DECLS |
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#endif /* __GST_AUDIO_AUDIO_H__ */ |