1 /*
2 **
3 ** Copyright 2007, The Android Open Source Project
4 **
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
8 **
9 ** http://www.apache.org/licenses/LICENSE-2.0
10 **
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 */
17
18 #define LOG_TAG "AudioHwDevice"
19 //#define LOG_NDEBUG 0
20
21 #include <hardware/audio.h>
22 #include <utils/Log.h>
23
24 #include <audio_utils/spdif/SPDIFEncoder.h>
25
26 #include "AudioHwDevice.h"
27 #include "AudioStreamOut.h"
28 #include "SpdifStreamOut.h"
29
30 namespace android {
31
32 // ----------------------------------------------------------------------------
33
openOutputStream(AudioStreamOut ** ppStreamOut,audio_io_handle_t handle,audio_devices_t devices,audio_output_flags_t flags,struct audio_config * config,const char * address)34 status_t AudioHwDevice::openOutputStream(
35 AudioStreamOut **ppStreamOut,
36 audio_io_handle_t handle,
37 audio_devices_t devices,
38 audio_output_flags_t flags,
39 struct audio_config *config,
40 const char *address)
41 {
42
43 struct audio_config originalConfig = *config;
44 AudioStreamOut *outputStream = new AudioStreamOut(this, flags);
45
46 // Try to open the HAL first using the current format.
47 ALOGV("openOutputStream(), try "
48 " sampleRate %d, Format %#x, "
49 "channelMask %#x",
50 config->sample_rate,
51 config->format,
52 config->channel_mask);
53 status_t status = outputStream->open(handle, devices, config, address);
54
55 if (status != NO_ERROR) {
56 delete outputStream;
57 outputStream = NULL;
58
59 // FIXME Look at any modification to the config.
60 // The HAL might modify the config to suggest a wrapped format.
61 // Log this so we can see what the HALs are doing.
62 ALOGI("openOutputStream(), HAL returned"
63 " sampleRate %d, Format %#x, "
64 "channelMask %#x, status %d",
65 config->sample_rate,
66 config->format,
67 config->channel_mask,
68 status);
69
70 // If the data is encoded then try again using wrapped PCM.
71 bool wrapperNeeded = !audio_is_linear_pcm(originalConfig.format)
72 && ((flags & AUDIO_OUTPUT_FLAG_DIRECT) != 0)
73 && ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0);
74
75 if (wrapperNeeded) {
76 if (SPDIFEncoder::isFormatSupported(originalConfig.format)) {
77 outputStream = new SpdifStreamOut(this, flags, originalConfig.format);
78 status = outputStream->open(handle, devices, &originalConfig, address);
79 if (status != NO_ERROR) {
80 ALOGE("ERROR - openOutputStream(), SPDIF open returned %d",
81 status);
82 delete outputStream;
83 outputStream = NULL;
84 }
85 } else {
86 ALOGE("ERROR - openOutputStream(), SPDIFEncoder does not support format 0x%08x",
87 originalConfig.format);
88 }
89 }
90 }
91
92 *ppStreamOut = outputStream;
93 return status;
94 }
95
96
97 }; // namespace android
98