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Commit 6ceda20b authored by Siddartha Shaik's avatar Siddartha Shaik Committed by Garmond Leung
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audio: hal: Latency mode support for transcode loopback 

Add property to enable latency mode configuration
for DSP HW transcode loopback usecase.

CRs-Fixed: 2092579
Change-Id: I8d5d1c1b684ebb535c96ac092d6b45b46e2deac6
parent e0548d41

hal/audio_extn/hw_loopback.c

+32 −1
Original line number Diff line number Diff line
@@ -62,7 +62,8 @@ 
#include <system/thread_defs.h>

#include <cutils/sched_policy.h>

#include "audio_extn.h"

#include "sound/compress_params.h"

#include <sound/compress_params.h>

#include <sound/compress_offload.h>

#include <system/audio.h>



/*
@@ -336,6 +337,27 @@ int loopback_stream_cb(stream_callback_event_t event, void *param, void *cookie) 
    return 0;

}



#if defined SNDRV_COMPRESS_LATENCY_MODE

static void transcode_loopback_util_set_latency_mode(

                             loopback_patch_t *active_loopback_patch,

                             uint32_t latency_mode)

{

    struct snd_compr_metadata metadata;



    metadata.key = SNDRV_COMPRESS_LATENCY_MODE;

    metadata.value[0] = latency_mode;

    ALOGV("%s: Setting latency mode %d",__func__, latency_mode);

    compress_set_metadata(active_loopback_patch->source_stream,&metadata);

}

#else

static void transcode_loopback_util_set_latency_mode(

                            loopback_patch_t *active_loopback_patch __unused,

                            uint32_t latency_mode __unused)

{

    ALOGD("%s:: Latency mode configuration not supported", __func__);

}

#endif



/* Create a loopback session based on active loopback patch selected */

int create_loopback_session(loopback_patch_t *active_loopback_patch)

{
@@ -353,6 +375,7 @@ int create_loopback_session(loopback_patch_t *active_loopback_patch) 
    struct stream_inout *inout =  &active_loopback_patch->patch_stream;

    struct adsp_hdlr_stream_cfg hdlr_stream_cfg;

    struct stream_in loopback_source_stream;

    char prop_value[PROPERTY_VALUE_MAX] = {0};



    ALOGD("%s: Create loopback session begin", __func__);
@@ -465,6 +488,14 @@ int create_loopback_session(loopback_patch_t *active_loopback_patch) 
    sink_config.fragments = 1;

    sink_config.codec = &codec;



    /* Do not alter the location of sending latency mode property */

    /* Mode set on any stream but before both streams are open */

    if(property_get("audio.transcode.latency.mode", prop_value, "")) {

        uint32_t latency_mode = atoi(prop_value);

        transcode_loopback_util_set_latency_mode(active_loopback_patch,

                                                 latency_mode);

    }



    /* Open compress stream in playback path */

    active_loopback_patch->sink_stream = compress_open(adev->snd_card,

                         pcm_dev_asm_rx_id, COMPRESS_IN, &sink_config);