AudioHwDevice.cpp revision 062e67a26e0553dd142be622821f493df541f0c6 
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
30namespace android {
31
32// ----------------------------------------------------------------------------
33
34status_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("AudioHwDevice::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("AudioHwDevice::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        // FIXME - Add isEncodingSupported() query to SPDIF wrapper then
76        // call it from here.
77        if (wrapperNeeded) {
78            outputStream = new SpdifStreamOut(this, flags);
79            status = outputStream->open(handle, devices, &originalConfig, address);
80            if (status != NO_ERROR) {
81                ALOGE("ERROR - AudioHwDevice::openOutputStream(), SPDIF open returned %d",
82                    status);
83                delete outputStream;
84                outputStream = NULL;
85            }
86        }
87    }
88
89    *ppStreamOut = outputStream;
90    return status;
91}
92
93
94}; // namespace android
95