mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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fa8c2eb659
Original commit message from CVS: Make the base audiosink return an error when there is no audiobuffer negotiated.
225 lines
6.4 KiB
C
225 lines
6.4 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_RINGBUFFER_H__
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#define __GST_RINGBUFFER_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define GST_TYPE_RINGBUFFER (gst_ringbuffer_get_type())
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#define GST_RINGBUFFER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RINGBUFFER,GstRingBuffer))
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#define GST_RINGBUFFER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RINGBUFFER,GstRingBufferClass))
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#define GST_RINGBUFFER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_RINGBUFFER, GstRingBufferClass))
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#define GST_IS_RINGBUFFER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RINGBUFFER))
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#define GST_IS_RINGBUFFER_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RINGBUFFER))
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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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typedef enum {
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GST_RINGBUFFER_STATE_STOPPED,
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GST_RINGBUFFER_STATE_PAUSED,
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GST_RINGBUFFER_STATE_PLAYING,
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} GstRingBufferState;
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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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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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struct _GstRingBufferSpec
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{
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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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GstClockTime latency_time; /* the required/actual latency time */
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GstClockTime 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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};
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#define GST_RINGBUFFER_GET_COND(buf) (((GstRingBuffer *)buf)->cond)
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#define GST_RINGBUFFER_WAIT(buf) (g_cond_wait (GST_RINGBUFFER_GET_COND (buf), GST_GET_LOCK (buf)))
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#define GST_RINGBUFFER_SIGNAL(buf) (g_cond_signal (GST_RINGBUFFER_GET_COND (buf)))
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#define GST_RINGBUFFER_BROADCAST(buf)(g_cond_broadcast (GST_RINGBUFFER_GET_COND (buf)))
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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 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; /* number of samples per segment */
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guint8 *empty_seg;
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/*< public >*/ /* ATOMIC */
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gint state; /* state of the buffer */
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gint segplayed; /* number of segments played since last start */
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gint waiting; /* when waiting for a segment to be freed */
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/*< private >*/
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guint64 next_sample; /* the next sample we need to write */
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GstRingBufferCallback callback;
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gpointer cb_data;
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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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/* allocate the resources for the ringbuffer using the given specs */
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gboolean (*acquire) (GstRingBuffer *buf, GstRingBufferSpec *spec);
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/* free resources of the ringbuffer */
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gboolean (*release) (GstRingBuffer *buf);
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/* playback control */
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gboolean (*play) (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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/* number of samples queued in device */
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guint (*delay) (GstRingBuffer *buf);
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};
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GType gst_ringbuffer_get_type(void);
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/* callback stuff */
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void gst_ringbuffer_set_callback (GstRingBuffer *buf, GstRingBufferCallback cb,
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gpointer user_data);
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/* allocate resources */
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gboolean gst_ringbuffer_acquire (GstRingBuffer *buf, GstRingBufferSpec *spec);
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gboolean gst_ringbuffer_release (GstRingBuffer *buf);
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gboolean gst_ringbuffer_is_acquired (GstRingBuffer *buf);
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/* playback/pause */
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gboolean gst_ringbuffer_play (GstRingBuffer *buf);
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gboolean gst_ringbuffer_pause (GstRingBuffer *buf);
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gboolean gst_ringbuffer_stop (GstRingBuffer *buf);
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/* get status */
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guint gst_ringbuffer_delay (GstRingBuffer *buf);
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guint64 gst_ringbuffer_played_samples (GstRingBuffer *buf);
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void gst_ringbuffer_set_sample (GstRingBuffer *buf, guint64 sample);
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/* commit samples */
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guint gst_ringbuffer_commit (GstRingBuffer *buf, guint64 sample,
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guchar *data, guint len);
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/* mostly protected */
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gboolean gst_ringbuffer_prepare_read (GstRingBuffer *buf, gint *segment, guint8 **readptr, gint *len);
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void gst_ringbuffer_clear (GstRingBuffer *buf, gint segment);
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void gst_ringbuffer_advance (GstRingBuffer *buf, guint advance);
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G_END_DECLS
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#endif /* __GST_RINGBUFFER_H__ */
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