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19cd03c607
Original commit message from CVS: * ext/alsa/gstalsasink.c: (set_hwparams), (gst_alsasink_prepare): Don't try to calculate silence samples, base class does this much better now. * gst-libs/gst/audio/gstringbuffer.c: (build_linear_format), (gst_ring_buffer_debug_spec_caps), (gst_ring_buffer_parse_caps), (gst_ring_buffer_acquire): Calculate silence samples correctly. * gst-libs/gst/audio/gstringbuffer.h: Add _CAST macro.
348 lines
11 KiB
C
348 lines
11 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2005 Wim Taymans <wim@fluendo.com>
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*
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* gstringbuffer.h:
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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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#ifndef __GST_RING_BUFFER_H__
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#define __GST_RING_BUFFER_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define GST_TYPE_RING_BUFFER (gst_ring_buffer_get_type())
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#define GST_RING_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RING_BUFFER,GstRingBuffer))
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#define GST_RING_BUFFER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RING_BUFFER,GstRingBufferClass))
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#define GST_RING_BUFFER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_RING_BUFFER, GstRingBufferClass))
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#define GST_RING_BUFFER_CAST(obj) ((GstRingBuffer *)obj)
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#define GST_IS_RING_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RING_BUFFER))
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#define GST_IS_RING_BUFFER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RING_BUFFER))
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typedef struct _GstRingBuffer GstRingBuffer;
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typedef struct _GstRingBufferClass GstRingBufferClass;
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typedef struct _GstRingBufferSpec GstRingBufferSpec;
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/* called to fill data with len bytes of samples */
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typedef void (*GstRingBufferCallback) (GstRingBuffer *rbuf, guint8* data, guint len, gpointer user_data);
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/**
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* GstRingBufferState:
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* @GST_RING_BUFFER_STATE_STOPPED: The ringbuffer is stopped
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* @GST_RING_BUFFER_STATE_PAUSED: The ringbuffer is paused
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* @GST_RING_BUFFER_STATE_STARTED: The ringbuffer is started
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*
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* The state of the ringbuffer.
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*/
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typedef enum {
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GST_RING_BUFFER_STATE_STOPPED,
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GST_RING_BUFFER_STATE_PAUSED,
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GST_RING_BUFFER_STATE_STARTED,
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} GstRingBufferState;
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/**
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* GstRingBufferSegState:
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* @GST_SEGSTATE_INVALID: The content of the segment is invalid
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* @GST_SEGSTATE_EMPTY: The segment is empty
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* @GST_SEGSTATE_FILLED: The segment contains valid data
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* @GST_SEGSTATE_PARTIAL: The segment partially contains valid data
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*
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* The state of a segment in the ringbuffer.
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*/
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typedef enum {
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GST_SEGSTATE_INVALID,
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GST_SEGSTATE_EMPTY,
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GST_SEGSTATE_FILLED,
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GST_SEGSTATE_PARTIAL,
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} GstRingBufferSegState;
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/**
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* GstBufferFormatType:
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* @GST_BUFTYPE_LINEAR: samples in linear PCM
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* @GST_BUFTYPE_FLOAT: samples in float
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* @GST_BUFTYPE_MU_LAW: samples in mulaw
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* @GST_BUFTYPE_A_LAW: samples in alaw
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* @GST_BUFTYPE_IMA_ADPCM: samples in ima adpcm
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* @GST_BUFTYPE_MPEG: samples in mpeg audio format
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* @GST_BUFTYPE_GSM: samples in gsm format
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*
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* The format of the samples in the ringbuffer.
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*/
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typedef enum
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{
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GST_BUFTYPE_LINEAR,
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GST_BUFTYPE_FLOAT,
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GST_BUFTYPE_MU_LAW,
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GST_BUFTYPE_A_LAW,
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GST_BUFTYPE_IMA_ADPCM,
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GST_BUFTYPE_MPEG,
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GST_BUFTYPE_GSM,
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} GstBufferFormatType;
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typedef enum
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{
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GST_UNKNOWN,
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GST_S8,
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GST_U8,
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GST_S16_LE,
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GST_S16_BE,
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GST_U16_LE,
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GST_U16_BE,
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GST_S24_LE,
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GST_S24_BE,
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GST_U24_LE,
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GST_U24_BE,
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GST_S32_LE,
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GST_S32_BE,
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GST_U32_LE,
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GST_U32_BE,
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GST_S24_3LE,
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GST_S24_3BE,
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GST_U24_3LE,
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GST_U24_3BE,
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GST_S20_3LE,
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GST_S20_3BE,
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GST_U20_3LE,
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GST_U20_3BE,
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GST_S18_3LE,
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GST_S18_3BE,
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GST_U18_3LE,
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GST_U18_3BE,
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GST_FLOAT32_LE,
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GST_FLOAT32_BE,
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GST_FLOAT64_LE,
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GST_FLOAT64_BE,
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GST_MU_LAW,
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GST_A_LAW,
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GST_IMA_ADPCM,
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GST_MPEG,
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GST_GSM,
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/* fill me */
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} GstBufferFormat;
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/**
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* GstRingBufferSpec:
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* @caps: The caps that generated the Spec.
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* @type: the sample type
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* @format: the sample format
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* @sign: the sample sign
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* @bigend: the endianness of the samples
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* @width: the width of the samples
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* @depth: th depth of the samples
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* @rate: the samplerate
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* @channels: the number of channels
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* @latency_time: the latency in microseconds
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* @buffer_time: the total buffer size in microseconds
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* @segsize: the size of one segment in bytes
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* @segtotal: the total number of segments
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* @bytes_per_sample: number of bytes in one sample
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* @silence_sample: bytes representing one sample of silence
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*
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* The structure containing the format specification of the ringbuffer.
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*/
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struct _GstRingBufferSpec
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{
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/*< public >*/
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/* in */
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GstCaps *caps; /* the caps of the buffer */
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/* in/out */
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GstBufferFormatType type;
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GstBufferFormat format;
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gboolean sign;
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gboolean bigend;
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gint width;
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gint depth;
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gint rate;
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gint channels;
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guint64 latency_time; /* the required/actual latency time */
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guint64 buffer_time; /* the required/actual time of the buffer */
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gint segsize; /* size of one buffer segement */
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gint segtotal; /* total number of segments */
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/* out */
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gint bytes_per_sample; /* number of bytes of one sample */
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guint8 silence_sample[32]; /* bytes representing silence */
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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#define GST_RING_BUFFER_GET_COND(buf) (((GstRingBuffer *)buf)->cond)
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#define GST_RING_BUFFER_WAIT(buf) (g_cond_wait (GST_RING_BUFFER_GET_COND (buf), GST_OBJECT_GET_LOCK (buf)))
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#define GST_RING_BUFFER_SIGNAL(buf) (g_cond_signal (GST_RING_BUFFER_GET_COND (buf)))
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#define GST_RING_BUFFER_BROADCAST(buf)(g_cond_broadcast (GST_RING_BUFFER_GET_COND (buf)))
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/**
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* GstRingBuffer:
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* @cond: used to signal start/stop/pause/resume actions
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* @open: boolean indicating that the ringbuffer is open
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* @acquired: boolean indicating that the ringbuffer is acquired
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* @data: data in the ringbuffer
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* @spec: format and layout of the ringbuffer data
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* @segstate: status of each segment in the ringbuffer (unused)
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* @samples_per_seg: number of samples in one segment
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* @empty_seg: pointer to memory holding one segment of silence samples
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* @state: state of the buffer
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* @segdone: readpointer in the ringbuffer
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* @segbase: segment corresponding to segment 0 (unused)
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* @waiting: is a reader or writer waiting for a free segment
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*
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* The ringbuffer base class structure.
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*/
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struct _GstRingBuffer {
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GstObject object;
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/*< public >*/ /* with LOCK */
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GCond *cond;
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gboolean open;
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gboolean acquired;
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GstBuffer *data;
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GstRingBufferSpec spec;
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GstRingBufferSegState *segstate;
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gint samples_per_seg;
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guint8 *empty_seg;
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/*< public >*/ /* ATOMIC */
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gint state;
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gint segdone;
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gint segbase;
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gint waiting;
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/*< private >*/
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GstRingBufferCallback callback;
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gpointer cb_data;
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/*< private >*/
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union {
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struct {
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gboolean flushing;
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/* ATOMIC */
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gint may_start;
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} ABI;
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/* adding + 0 to mark ABI change to be undone later */
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gpointer _gst_reserved[GST_PADDING + 0];
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} abidata;
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};
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/**
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* GstRingBufferClass:
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* @open_device: open the device, don't set any params or allocate anything
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* @acquire: allocate the resources for the ringbuffer using the given spec
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* @release: free resources of the ringbuffer
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* @close_device: close the device
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* @start: start processing of samples
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* @pause: pause processing of samples
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* @resume: resume processing of samples after pause
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* @stop: stop processing of samples
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* @delay: get number of samples queued in device
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*
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* The vmethods that subclasses can override to implement the ringbuffer.
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*/
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struct _GstRingBufferClass {
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GstObjectClass parent_class;
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/*< public >*/
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gboolean (*open_device) (GstRingBuffer *buf);
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gboolean (*acquire) (GstRingBuffer *buf, GstRingBufferSpec *spec);
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gboolean (*release) (GstRingBuffer *buf);
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gboolean (*close_device) (GstRingBuffer *buf);
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gboolean (*start) (GstRingBuffer *buf);
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gboolean (*pause) (GstRingBuffer *buf);
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gboolean (*resume) (GstRingBuffer *buf);
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gboolean (*stop) (GstRingBuffer *buf);
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guint (*delay) (GstRingBuffer *buf);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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GType gst_ring_buffer_get_type(void);
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/* callback stuff */
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void gst_ring_buffer_set_callback (GstRingBuffer *buf, GstRingBufferCallback cb,
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gpointer user_data);
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gboolean gst_ring_buffer_parse_caps (GstRingBufferSpec *spec, GstCaps *caps);
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void gst_ring_buffer_debug_spec_caps (GstRingBufferSpec *spec);
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void gst_ring_buffer_debug_spec_buff (GstRingBufferSpec *spec);
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/* device state */
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gboolean gst_ring_buffer_open_device (GstRingBuffer *buf);
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gboolean gst_ring_buffer_close_device (GstRingBuffer *buf);
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gboolean gst_ring_buffer_device_is_open (GstRingBuffer *buf);
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/* allocate resources */
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gboolean gst_ring_buffer_acquire (GstRingBuffer *buf, GstRingBufferSpec *spec);
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gboolean gst_ring_buffer_release (GstRingBuffer *buf);
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gboolean gst_ring_buffer_is_acquired (GstRingBuffer *buf);
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/* flushing */
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void gst_ring_buffer_set_flushing (GstRingBuffer *buf, gboolean flushing);
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/* playback/pause */
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gboolean gst_ring_buffer_start (GstRingBuffer *buf);
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gboolean gst_ring_buffer_pause (GstRingBuffer *buf);
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gboolean gst_ring_buffer_stop (GstRingBuffer *buf);
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/* get status */
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guint gst_ring_buffer_delay (GstRingBuffer *buf);
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guint64 gst_ring_buffer_samples_done (GstRingBuffer *buf);
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void gst_ring_buffer_set_sample (GstRingBuffer *buf, guint64 sample);
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/* clear all segments */
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void gst_ring_buffer_clear_all (GstRingBuffer *buf);
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/* commit samples */
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guint gst_ring_buffer_commit (GstRingBuffer *buf, guint64 sample,
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guchar *data, guint len);
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/* read samples */
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guint gst_ring_buffer_read (GstRingBuffer *buf, guint64 sample,
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guchar *data, guint len);
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/* mostly protected */
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/* not yet implemented
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gboolean gst_ring_buffer_prepare_write (GstRingBuffer *buf, gint *segment, guint8 **writeptr, gint *len);
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*/
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gboolean gst_ring_buffer_prepare_read (GstRingBuffer *buf, gint *segment, guint8 **readptr, gint *len);
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void gst_ring_buffer_clear (GstRingBuffer *buf, gint segment);
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void gst_ring_buffer_advance (GstRingBuffer *buf, guint advance);
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void gst_ring_buffer_may_start (GstRingBuffer *buf, gboolean allowed);
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G_END_DECLS
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#endif /* __GST_RING_BUFFER_H__ */
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