src/add-ons/media/media-add-ons/mixer/MixerAddOn.cpp

   1 /*
   2  * Copyright 2002 David Shipman,
   3  * Copyright 2003-2007 Marcus Overhagen
   4  * Copyright 2007 Haiku Inc. All rights reserved.
   5  * Distributed under the terms of the MIT License.
   6  */
   7
   8
   9 #include "MixerAddOn.h"
  10
  11 #include <stdio.h>
  12 #include <string.h>
  13
  14 #include <MediaRoster.h>
  15 #include <MediaNode.h>
  16
  17 #include "AudioMixer.h"
  18
  19
  20 // instantiation function
  21 extern "C" _EXPORT BMediaAddOn* make_media_addon(image_id image) {
  22         return new AudioMixerAddon(image);
  23 }
  24
  25
  26 AudioMixerAddon::AudioMixerAddon(image_id image)
  27         :
  28         BMediaAddOn(image),
  29         fFormat(new media_format),
  30         fInfo(new flavor_info)
  31 {
  32         memset(fFormat, 0, sizeof(*fFormat));
  33         fFormat->type = B_MEDIA_RAW_AUDIO;
  34         fFormat->u.raw_audio = media_raw_audio_format::wildcard;
  35
  36         fInfo->internal_id = 0;
  37         fInfo->name = (char *)"Audio Mixer (Haiku)";
  38         fInfo->info = (char *)"Haiku Audio Mixer media addon";
  39         fInfo->kinds = B_BUFFER_PRODUCER | B_BUFFER_CONSUMER | B_SYSTEM_MIXER | B_CONTROLLABLE;
  40         fInfo->flavor_flags = 0;        // 0 = global or local instantiation allowed, no restrictions
  41         fInfo->possible_count = 0;      // 0 = infinite
  42         fInfo->in_format_count = 1;
  43         fInfo->in_formats = fFormat;
  44         fInfo->out_format_count = 1;
  45         fInfo->out_formats = fFormat;
  46 }
  47
  48
  49 AudioMixerAddon::~AudioMixerAddon()
  50 {
  51         delete fFormat;
  52         delete fInfo;
  53 }
  54
  55
  56 // #pragma mark - BMediaAddOn implementation
  57
  58
  59 status_t
  60 AudioMixerAddon::InitCheck(const char** out_failure_text)
  61 {
  62         return B_OK;
  63 }
  64
  65
  66 int32
  67 AudioMixerAddon::CountFlavors()
  68 {
  69         return 1;
  70 }
  71
  72
  73 status_t
  74 AudioMixerAddon::GetFlavorAt(int32 n, const flavor_info** out_info)
  75 {
  76         // only the 0th flavor exists
  77         if (n != 0)
  78                 return B_ERROR;
  79
  80         *out_info = fInfo;
  81         return B_OK;
  82 }
  83
  84
  85 BMediaNode *
  86 AudioMixerAddon::InstantiateNodeFor(const flavor_info* info, BMessage* config,
  87         status_t* out_error)
  88 {
  89         return new AudioMixer(this, false);
  90 }
  91
  92
  93 status_t
  94 AudioMixerAddon::GetConfigurationFor(BMediaNode* your_node,
  95         BMessage* into_message)
  96 {
  97         // no config yet
  98         return B_ERROR;
  99 }
 100
 101
 102 bool
 103 AudioMixerAddon::WantsAutoStart()
 104 {
 105         return true;
 106 }
 107
 108
 109 status_t
 110 AudioMixerAddon::AutoStart(int in_index, BMediaNode **out_node,
 111         int32 *out_internal_id, bool *out_has_more)
 112 {
 113         *out_has_more = false;
 114
 115         if (in_index != 0)
 116                 return B_ERROR;
 117
 118         *out_internal_id = 0;
 119         AudioMixer *mixer = new AudioMixer(this, true);
 120         *out_node = mixer;
 121
 122         return B_OK;
 123 }