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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24: /*
25: * AudioStream.h
26: *
27: * Copyright (c) 1991, NeXT Computer, Inc. All rights reserved.
28: *
29: * Audio driver stream object.
30: *
31: * HISTORY
32: * 07/14/92/mtm Original coding.
33: */
34:
35: #import <kern/lock.h>
36: #import <objc/Object.h>
37: #import <mach/mach_types.h>
38: #import <bsd/sys/types.h>
39: #import <kernserv/queue.h>
40: #import <machkit/NXLock.h>
41: #import <sys/time.h>
42: #import <driverkit/NXSoundParameterTags.h>
43: #import "audio_types.h"
44: #import "AudioChannel.h"
45:
46: /*
47: * For user message sends.
48: */
49: #define STREAM_SEND_OPTIONS (SEND_TIMEOUT|SEND_SWITCH)
50: #define STREAM_SEND_TIMEOUT 1000
51:
52: /*
53: * Timed control thread messages.
54: */
55: #define AC_CONTROL_THREAD_MSG 0
56: typedef struct control_msg {
57: msg_header_t header;
58: msg_type_t args_type;
59: id obj;
60: ACStreamControl action;
61: struct timeval *when;
62: } control_msg_t;
63:
64: /*
65: * Playback or record memory region queue structure.
66: */
67: typedef struct region_flags {
68: u_int started;
69: u_int ended;
70: u_int split;
71: u_int aborted;
72: u_int excluded;
73: } region_flags_t;
74:
75: typedef struct region {
76: vm_address_t data;
77: vm_address_t end;
78: vm_address_t enq_ptr;
79: vm_address_t record_ptr;
80: u_int count;
81: int tag;
82: u_int messages;
83: port_t reply_port;
84: dma_desc_t *start_ddp;
85: dma_desc_t *end_ddp;
86: region_flags_t flags;
87: #if 0
88: boolean_t marks_bumped; /* touched water marks */
89: vm_address_t wire_head; /* wire pointer */
90: vm_address_t wire_tail; /* unwire pointer */
91: boolean_t active; /* doing dma */
92: boolean_t underrun; /* overflow/underrun occured */
93: boolean_t low_reached; /* reached low water first time */
94: #endif
95: queue_chain_t link;
96: } region_t;
97:
98: @interface AudioStream: Object
99: {
100: id channel;
101: id device;
102: port_t userPort;
103: port_t kernUserPort;
104: port_t ownerPort;
105: int tag;
106: ASType type;
107: u_int bytesProcessed;
108: BOOL isPaused;
109: id regionQueueLock;
110: queue_head_t regionQueue;
111: msg_header_t *sndReplyMsg;
112: port_t pausePort;
113: port_t resumePort;
114: port_t abortPort;
115: struct timeval pauseTime;
116: struct timeval resumeTime;
117: struct timeval abortTime;
118: port_t userReplyPort;
119: ASMsgRequest userReplyMessages;
120: u_int samplingRate;
121: IOAudioDataFormat dataFormat;
122: u_int channelCount;
123: char *mixBuffer1;
124: char *mixBuffer2;
125: }
126:
127: - initChannel:chan tag:(int)aTag user:(port_t *)user
128: owner:(port_t)owner type:(u_int)aType;
129: - (port_t)userPort;
130: - (port_t)ownerPort;
131: - channel;
132: - (ASType)type;
133: - dmaCompleteDescriptor:(dma_desc_t *)tag transfered:(u_int)count;
134: - (BOOL)canConvertRegion:(region_t *)region rate:(u_int)srate
135: format:(IOAudioDataFormat)format channelCount:(u_int)chans;
136: - clearForMix:(char *)buf size:(u_int)count format:(IOAudioDataFormat)format;
137: - (u_int)mixBuffer:(vm_address_t)data maxCount:(u_int)max
138: rate:(u_int *)srate format:(IOAudioDataFormat *)format
139: channelCount:(u_int *)chans descriptor:(dma_desc_t *)ddp
140: virgin:(BOOL)isVirgin streamCount:(u_int)streams;
141:
142: - (u_int)mixRegion:(region_t *)region descriptor:(dma_desc_t *)ddp
143: buffer:(vm_address_t)data maxCount:(u_int)max
144: virgin:(BOOL)isVirgin rate:(u_int)srate format:(IOAudioDataFormat)format
145: channelCount:(u_int)chans;
146:
147: - freeRegion:(region_t *)region;
148: - (region_t *)newRegion;
149: - free;
150: - control:(ACStreamControl)action atTime:(struct timeval)when;
151: - control:(ACStreamControl)action;
152: - returnRecordedData;
153: - setOwner:(port_t)newOwner;
154: - (BOOL)bytesProcessed:(u_int *)num atTime:(unsigned int *)ts;
155:
156: - (NXSoundParameterTag)dataEncoding;
157: - (void)setDataEncoding:(NXSoundParameterTag)encoding;
158: - (u_int)samplingRate;
159: - (void)setSamplingRate:(u_int)rate;
160: - (u_int)channelCount;
161: - (void)setChannelCount:(u_int)count;
162: - (u_int)lowWaterMark;
163: - (void)setLowWaterMark:(u_int)count;
164: - (u_int)highWaterMark;
165: - (void)setHighWaterMark:(u_int)count;
166:
167: @end
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