ppapi/thunk/ppb_audio_config_thunk.cc

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ppapi/thunk/thunk.h"
   6 #include "ppapi/thunk/enter.h"
   7 #include "ppapi/thunk/ppb_audio_config_api.h"
   8 #include "ppapi/thunk/resource_creation_api.h"
   9
  10 namespace ppapi {
  11 namespace thunk {
  12
  13 namespace {
  14
  15 PP_Resource CreateStereo16bit(PP_Instance instance,
  16                               PP_AudioSampleRate sample_rate,
  17                               uint32_t sample_frame_count) {
  18   EnterFunction<ResourceCreationAPI> enter(instance, true);
  19   if (enter.failed())
  20     return 0;
  21   return enter.functions()->CreateAudioConfig(instance, sample_rate,
  22                                               sample_frame_count);
  23 }
  24
  25 uint32_t RecommendSampleFrameCount(PP_AudioSampleRate sample_rate,
  26                                    uint32_t requested_sample_frame_count) {
  27   // TODO(brettw) Currently we don't actually query to get a value from the
  28   // hardware, so we always return the input for in-range values.
  29   if (requested_sample_frame_count < PP_AUDIOMINSAMPLEFRAMECOUNT)
  30     return PP_AUDIOMINSAMPLEFRAMECOUNT;
  31   if (requested_sample_frame_count > PP_AUDIOMAXSAMPLEFRAMECOUNT)
  32     return PP_AUDIOMAXSAMPLEFRAMECOUNT;
  33   return requested_sample_frame_count;
  34 }
  35
  36 PP_Bool IsAudioConfig(PP_Resource resource) {
  37   EnterResource<PPB_AudioConfig_API> enter(resource, false);
  38   return PP_FromBool(enter.succeeded());
  39 }
  40
  41 PP_AudioSampleRate GetSampleRate(PP_Resource config_id) {
  42   EnterResource<PPB_AudioConfig_API> enter(config_id, true);
  43   if (enter.failed())
  44     return PP_AUDIOSAMPLERATE_NONE;
  45   return enter.object()->GetSampleRate();
  46 }
  47
  48 uint32_t GetSampleFrameCount(PP_Resource config_id) {
  49   EnterResource<PPB_AudioConfig_API> enter(config_id, true);
  50   if (enter.failed())
  51     return 0;
  52   return enter.object()->GetSampleFrameCount();
  53 }
  54
  55 const PPB_AudioConfig g_ppb_audio_config_thunk = {
  56   &CreateStereo16bit,
  57   &RecommendSampleFrameCount,
  58   &IsAudioConfig,
  59   &GetSampleRate,
  60   &GetSampleFrameCount
  61 };
  62
  63 }  // namespace
  64
  65 const PPB_AudioConfig* GetPPB_AudioConfig_Thunk() {
  66   return &g_ppb_audio_config_thunk;
  67 }
  68
  69 }  // namespace thunk
  70 }  // namespace ppapi