| /* |
| * Copyright (c) 2014-2016, The Linux Foundation. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * * Neither the name of The Linux Foundation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #define LOG_TAG "passthru" |
| /*#define LOG_NDEBUG 0*/ |
| #include <stdlib.h> |
| #include <cutils/atomic.h> |
| #include <cutils/str_parms.h> |
| #include <cutils/log.h> |
| #include "audio_hw.h" |
| #include "audio_extn.h" |
| #include "platform_api.h" |
| #include <platform.h> |
| #include <cutils/properties.h> |
| |
| #include "sound/compress_params.h" |
| |
| static const audio_format_t audio_passthru_formats[] = { |
| AUDIO_FORMAT_AC3, |
| AUDIO_FORMAT_E_AC3, |
| AUDIO_FORMAT_E_AC3_JOC, |
| AUDIO_FORMAT_DTS, |
| AUDIO_FORMAT_DTS_HD |
| }; |
| |
| /* |
| * This atomic var is incremented/decremented by the offload stream to notify |
| * other pcm playback streams that a pass thru session is about to start or has |
| * finished. This hint can be used by the other streams to move to standby or |
| * start calling pcm_write respectively. |
| * This behavior is necessary as the DSP backend can only be configured to one |
| * of PCM or compressed. |
| */ |
| static volatile int32_t compress_passthru_active; |
| |
| bool audio_extn_passthru_is_supported_format(audio_format_t format) |
| { |
| int32_t num_passthru_formats = sizeof(audio_passthru_formats) / |
| sizeof(audio_passthru_formats[0]); |
| int32_t i; |
| |
| for (i = 0; i < num_passthru_formats; i++) { |
| if (format == audio_passthru_formats[i]) { |
| ALOGD("%s : pass through format is true", __func__); |
| return true; |
| } |
| } |
| ALOGD("%s : pass through format is false", __func__); |
| return false; |
| } |
| |
| /* |
| * must be called with stream lock held |
| * This function decides based on some rules whether the data |
| * coming on stream out must be rendered or dropped. |
| */ |
| bool audio_extn_passthru_should_drop_data(struct stream_out * out) |
| { |
| /*Drop data only |
| *stream is routed to HDMI and |
| *stream has PCM format or |
| *if a compress offload (DSP decode) session |
| */ |
| if ((out->devices & AUDIO_DEVICE_OUT_AUX_DIGITAL) && |
| (((out->format & AUDIO_FORMAT_MAIN_MASK) == AUDIO_FORMAT_PCM) || |
| ((out->compr_config.codec != NULL) && (out->compr_config.codec->compr_passthr == LEGACY_PCM)))) { |
| if (android_atomic_acquire_load(&compress_passthru_active) > 0) { |
| ALOGI("drop data as pass thru is active"); |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| /* called with adev lock held */ |
| void audio_extn_passthru_on_start(struct stream_out * out) |
| { |
| |
| uint64_t max_period_us = 0; |
| uint64_t temp; |
| struct audio_usecase * usecase; |
| struct listnode *node; |
| struct stream_out * o; |
| struct audio_device *adev = out->dev; |
| |
| if (android_atomic_acquire_load(&compress_passthru_active) > 0) { |
| ALOGI("pass thru is already active"); |
| return; |
| } |
| |
| ALOGV("inc pass thru count to notify other streams"); |
| android_atomic_inc(&compress_passthru_active); |
| |
| while (true) { |
| /* find max period time among active playback use cases */ |
| list_for_each(node, &adev->usecase_list) { |
| usecase = node_to_item(node, struct audio_usecase, list); |
| if (usecase->type == PCM_PLAYBACK && |
| usecase->devices & AUDIO_DEVICE_OUT_AUX_DIGITAL) { |
| o = usecase->stream.out; |
| temp = o->config.period_size * 1000000LL / o->sample_rate; |
| if (temp > max_period_us) |
| max_period_us = temp; |
| } |
| } |
| |
| if (max_period_us) { |
| pthread_mutex_unlock(&adev->lock); |
| usleep(2*max_period_us); |
| max_period_us = 0; |
| pthread_mutex_lock(&adev->lock); |
| } else |
| break; |
| } |
| } |
| |
| /* called with adev lock held */ |
| void audio_extn_passthru_on_stop(struct stream_out * out) |
| { |
| if (android_atomic_acquire_load(&compress_passthru_active) > 0) { |
| /* |
| * its possible the count is already zero if pause was called before |
| * stop output stream |
| */ |
| android_atomic_dec(&compress_passthru_active); |
| } |
| |
| if (out->devices & AUDIO_DEVICE_OUT_AUX_DIGITAL) { |
| ALOGI("passthru on aux digital, start keep alive"); |
| audio_extn_keep_alive_start(); |
| } |
| } |
| |
| void audio_extn_passthru_on_pause(struct stream_out * out __unused) |
| { |
| if (android_atomic_acquire_load(&compress_passthru_active) == 0) |
| return; |
| } |
| |
| int audio_extn_passthru_set_parameters(struct audio_device *adev __unused, |
| struct str_parms *parms __unused) |
| { |
| return 0; |
| } |
| |
| bool audio_extn_passthru_is_active() |
| { |
| return android_atomic_acquire_load(&compress_passthru_active) > 0; |
| } |
| |
| bool audio_extn_passthru_is_enabled() { return true; } |
| |
| void audio_extn_passthru_init(struct audio_device *adev __unused) |
| { |
| } |
| |
| bool audio_extn_passthru_should_standby(struct stream_out * out __unused) |
| { |
| return true; |
| } |
| |
| bool audio_extn_passthru_is_convert_supported(struct audio_device *adev, |
| struct stream_out *out) |
| { |
| |
| bool convert = false; |
| switch (out->format) { |
| case AUDIO_FORMAT_E_AC3: |
| case AUDIO_FORMAT_E_AC3_JOC: |
| case AUDIO_FORMAT_DTS_HD: |
| if (!platform_is_edid_supported_format(adev->platform, |
| out->format)) { |
| ALOGD("%s:PASSTHROUGH_CONVERT supported", __func__); |
| convert = true; |
| } |
| break; |
| default: |
| ALOGD("%s: PASSTHROUGH_CONVERT not supported for format 0x%x", |
| __func__, out->format); |
| break; |
| } |
| ALOGD("%s: convert %d", __func__, convert); |
| return convert; |
| } |
| |
| bool audio_extn_passthru_is_passt_supported(struct audio_device *adev, |
| struct stream_out *out) |
| { |
| bool passt = false; |
| switch (out->format) { |
| case AUDIO_FORMAT_E_AC3: |
| if (platform_is_edid_supported_format(adev->platform, out->format)) { |
| ALOGV("%s:PASSTHROUGH supported for format %x", |
| __func__, out->format); |
| passt = true; |
| } |
| break; |
| case AUDIO_FORMAT_AC3: |
| if (platform_is_edid_supported_format(adev->platform, AUDIO_FORMAT_AC3) |
| || platform_is_edid_supported_format(adev->platform, |
| AUDIO_FORMAT_E_AC3)) { |
| ALOGV("%s:PASSTHROUGH supported for format %x", |
| __func__, out->format); |
| passt = true; |
| } |
| break; |
| case AUDIO_FORMAT_E_AC3_JOC: |
| /* Check for DDP capability in edid for JOC contents.*/ |
| if (platform_is_edid_supported_format(adev->platform, |
| AUDIO_FORMAT_E_AC3)) { |
| ALOGV("%s:PASSTHROUGH supported for format %x", |
| __func__, out->format); |
| passt = true; |
| } |
| break; |
| case AUDIO_FORMAT_DTS: |
| if (platform_is_edid_supported_format(adev->platform, AUDIO_FORMAT_DTS) |
| || platform_is_edid_supported_format(adev->platform, |
| AUDIO_FORMAT_DTS_HD)) { |
| ALOGV("%s:PASSTHROUGH supported for format %x", |
| __func__, out->format); |
| passt = true; |
| } |
| break; |
| case AUDIO_FORMAT_DTS_HD: |
| if (platform_is_edid_supported_format(adev->platform, out->format)) { |
| ALOGV("%s:PASSTHROUGH supported for format %x", |
| __func__, out->format); |
| passt = true; |
| } |
| break; |
| default: |
| ALOGV("%s:Passthrough not supported", __func__); |
| } |
| return passt; |
| } |
| |
| void audio_extn_passthru_update_stream_configuration( |
| struct audio_device *adev, struct stream_out *out) |
| { |
| if (audio_extn_passthru_is_passt_supported(adev, out)) { |
| ALOGV("%s:PASSTHROUGH", __func__); |
| out->compr_config.codec->compr_passthr = PASSTHROUGH; |
| } else if (audio_extn_passthru_is_convert_supported(adev, out)){ |
| ALOGV("%s:PASSTHROUGH CONVERT", __func__); |
| out->compr_config.codec->compr_passthr = PASSTHROUGH_CONVERT; |
| } else { |
| ALOGV("%s:NO PASSTHROUGH", __func__); |
| out->compr_config.codec->compr_passthr = LEGACY_PCM; |
| } |
| } |
| |
| bool audio_extn_passthru_is_passthrough_stream(struct stream_out *out) |
| { |
| //check passthrough system property |
| if (!property_get_bool("audio.offload.passthrough", false)) { |
| return false; |
| } |
| |
| //check supported device, currently only on HDMI. |
| if (out->devices & AUDIO_DEVICE_OUT_AUX_DIGITAL) { |
| //passthrough flag |
| if (out->flags & AUDIO_OUTPUT_FLAG_COMPRESS_PASSTHROUGH) |
| return true; |
| //direct flag, check supported formats. |
| if (out->flags & AUDIO_OUTPUT_FLAG_DIRECT) { |
| if (audio_extn_passthru_is_supported_format(out->format)) { |
| if (platform_is_edid_supported_format(out->dev->platform, |
| out->format)) { |
| ALOGV("%s : return true",__func__); |
| return true; |
| } else if (audio_extn_is_dolby_format(out->format) && |
| platform_is_edid_supported_format(out->dev->platform, |
| AUDIO_FORMAT_AC3)){ |
| //return true for EAC3/EAC3_JOC formats |
| //if sink supports only AC3 |
| ALOGV("%s : return true",__func__); |
| return true; |
| } |
| } |
| } |
| } |
| ALOGV("%s : return false",__func__); |
| return false; |
| } |
| |
| int audio_extn_passthru_get_buffer_size(audio_offload_info_t* info) |
| { |
| return platform_get_compress_passthrough_buffer_size(info); |
| } |
| |
| int audio_extn_passthru_set_volume(struct stream_out *out, int mute) |
| { |
| return platform_set_device_params(out, DEVICE_PARAM_MUTE_ID, mute); |
| } |
| |
| int audio_extn_passthru_set_latency(struct stream_out *out, int latency) |
| { |
| return platform_set_device_params(out, DEVICE_PARAM_LATENCY_ID, latency); |
| } |