audin_opensl_es.c

 
#include <freerdp/config.h>
 
#include <winpr/assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
#include <winpr/crt.h>
#include <winpr/cmdline.h>
 
#include <freerdp/freerdp.h>
#include <freerdp/addin.h>
#include <freerdp/channels/rdpsnd.h>
 
#include <SLES/OpenSLES.h>
#include <freerdp/client/audin.h>
 
#include "audin_main.h"
#include "opensl_io.h"
 
typedef struct
{
  IAudinDevice iface;
 
  char* device_name;
  OPENSL_STREAM* stream;
 
  AUDIO_FORMAT format;
  UINT32 frames_per_packet;
 
  UINT32 bytes_per_channel;
 
  AudinReceive receive;
 
  void* user_data;
 
  rdpContext* rdpcontext;
  wLog* log;
} AudinOpenSLESDevice;
 
static UINT audin_opensles_close(IAudinDevice* device);
 
static void audin_receive(void* context, const void* data, size_t size)
{
  UINT error;
  AudinOpenSLESDevice* opensles = (AudinOpenSLESDevice*)context;
 
  if (!opensles || !data)
  {
    WLog_ERR(TAG, "Invalid arguments context=%p, data=%p", opensles, data);
    return;
  }
 
  error = opensles->receive(&opensles->format, data, size, opensles->user_data);
 
  if (error && opensles->rdpcontext)
    setChannelError(opensles->rdpcontext, error, "audin_receive reported an error");
}
 
static UINT audin_opensles_free(IAudinDevice* device)
{
  AudinOpenSLESDevice* opensles = (AudinOpenSLESDevice*)device;
 
  if (!opensles)
    return ERROR_INVALID_PARAMETER;
 
  WLog_Print(opensles->log, WLOG_DEBUG, "device=%p", (void*)device);
 
  free(opensles->device_name);
  free(opensles);
  return CHANNEL_RC_OK;
}
 
static BOOL audin_opensles_format_supported(IAudinDevice* device, const AUDIO_FORMAT* format)
{
  AudinOpenSLESDevice* opensles = (AudinOpenSLESDevice*)device;
 
  if (!opensles || !format)
    return FALSE;
 
  WLog_Print(opensles->log, WLOG_DEBUG, "device=%p, format=%p", (void*)opensles, (void*)format);
  WINPR_ASSERT(format);
 
  switch (format->wFormatTag)
  {
    case WAVE_FORMAT_PCM: /* PCM */
      if (format->cbSize == 0 && (format->nSamplesPerSec <= 48000) &&
          (format->wBitsPerSample == 8 || format->wBitsPerSample == 16) &&
          (format->nChannels >= 1 && format->nChannels <= 2))
      {
        return TRUE;
      }
 
      break;
 
    default:
      WLog_Print(opensles->log, WLOG_DEBUG, "Encoding '%s' [0x%04" PRIX16 "] not supported",
                 audio_format_get_tag_string(format->wFormatTag), format->wFormatTag);
      break;
  }
 
  return FALSE;
}
 
static UINT audin_opensles_set_format(IAudinDevice* device, const AUDIO_FORMAT* format,
                                      UINT32 FramesPerPacket)
{
  AudinOpenSLESDevice* opensles = (AudinOpenSLESDevice*)device;
 
  if (!opensles || !format)
    return ERROR_INVALID_PARAMETER;
 
  WLog_Print(opensles->log, WLOG_DEBUG, "device=%p, format=%p, FramesPerPacket=%" PRIu32 "",
             (void*)device, (void*)format, FramesPerPacket);
  WINPR_ASSERT(format);
 
  opensles->format = *format;
 
  switch (format->wFormatTag)
  {
    case WAVE_FORMAT_PCM:
      opensles->frames_per_packet = FramesPerPacket;
 
      switch (format->wBitsPerSample)
      {
        case 4:
          opensles->bytes_per_channel = 1;
          break;
 
        case 8:
          opensles->bytes_per_channel = 1;
          break;
 
        case 16:
          opensles->bytes_per_channel = 2;
          break;
 
        default:
          return ERROR_UNSUPPORTED_TYPE;
      }
 
      break;
 
    default:
      WLog_Print(opensles->log, WLOG_ERROR,
                 "Encoding '%" PRIu16 "' [%04" PRIX16 "] not supported", format->wFormatTag,
                 format->wFormatTag);
      return ERROR_UNSUPPORTED_TYPE;
  }
 
  WLog_Print(opensles->log, WLOG_DEBUG, "frames_per_packet=%" PRIu32,
             opensles->frames_per_packet);
  return CHANNEL_RC_OK;
}
 
static UINT audin_opensles_open(IAudinDevice* device, AudinReceive receive, void* user_data)
{
  AudinOpenSLESDevice* opensles = (AudinOpenSLESDevice*)device;
 
  if (!opensles || !receive || !user_data)
    return ERROR_INVALID_PARAMETER;
 
  WLog_Print(opensles->log, WLOG_DEBUG, "device=%p, receive=%p, user_data=%p", (void*)device,
             (void*)receive, (void*)user_data);
 
  if (opensles->stream)
    goto error_out;
 
  if (!(opensles->stream = android_OpenRecDevice(
            opensles, audin_receive, opensles->format.nSamplesPerSec, opensles->format.nChannels,
            opensles->frames_per_packet, opensles->format.wBitsPerSample)))
  {
    WLog_Print(opensles->log, WLOG_ERROR, "android_OpenRecDevice failed!");
    goto error_out;
  }
 
  opensles->receive = receive;
  opensles->user_data = user_data;
  return CHANNEL_RC_OK;
error_out:
  audin_opensles_close(device);
  return ERROR_INTERNAL_ERROR;
}
 
UINT audin_opensles_close(IAudinDevice* device)
{
  AudinOpenSLESDevice* opensles = (AudinOpenSLESDevice*)device;
 
  if (!opensles)
    return ERROR_INVALID_PARAMETER;
 
  WLog_Print(opensles->log, WLOG_DEBUG, "device=%p", (void*)device);
  android_CloseRecDevice(opensles->stream);
  opensles->receive = NULL;
  opensles->user_data = NULL;
  opensles->stream = NULL;
  return CHANNEL_RC_OK;
}
 
static UINT audin_opensles_parse_addin_args(AudinOpenSLESDevice* device, const ADDIN_ARGV* args)
{
  UINT status;
  DWORD flags;
  const COMMAND_LINE_ARGUMENT_A* arg;
  AudinOpenSLESDevice* opensles = (AudinOpenSLESDevice*)device;
  COMMAND_LINE_ARGUMENT_A audin_opensles_args[] = {
    { "dev", COMMAND_LINE_VALUE_REQUIRED, "<device>", NULL, NULL, -1, NULL,
      "audio device name" },
    { NULL, 0, NULL, NULL, NULL, -1, NULL, NULL }
  };
 
  WLog_Print(opensles->log, WLOG_DEBUG, "device=%p, args=%p", (void*)device, (void*)args);
  flags =
      COMMAND_LINE_SIGIL_NONE | COMMAND_LINE_SEPARATOR_COLON | COMMAND_LINE_IGN_UNKNOWN_KEYWORD;
  status = CommandLineParseArgumentsA(args->argc, args->argv, audin_opensles_args, flags,
                                      opensles, NULL, NULL);
 
  if (status < 0)
    return status;
 
  arg = audin_opensles_args;
 
  do
  {
    if (!(arg->Flags & COMMAND_LINE_VALUE_PRESENT))
      continue;
 
    CommandLineSwitchStart(arg) CommandLineSwitchCase(arg, "dev")
    {
      opensles->device_name = _strdup(arg->Value);
 
      if (!opensles->device_name)
      {
        WLog_Print(opensles->log, WLOG_ERROR, "_strdup failed!");
        return CHANNEL_RC_NO_MEMORY;
      }
    }
    CommandLineSwitchEnd(arg)
  } while ((arg = CommandLineFindNextArgumentA(arg)) != NULL);
 
  return CHANNEL_RC_OK;
}
 
FREERDP_ENTRY_POINT(UINT VCAPITYPE opensles_freerdp_audin_client_subsystem_entry(
    PFREERDP_AUDIN_DEVICE_ENTRY_POINTS pEntryPoints))
{
  const ADDIN_ARGV* args;
  AudinOpenSLESDevice* opensles;
  UINT error;
  opensles = (AudinOpenSLESDevice*)calloc(1, sizeof(AudinOpenSLESDevice));
 
  if (!opensles)
  {
    WLog_ERR(TAG, "calloc failed!");
    return CHANNEL_RC_NO_MEMORY;
  }
 
  opensles->log = WLog_Get(TAG);
  opensles->iface.Open = audin_opensles_open;
  opensles->iface.FormatSupported = audin_opensles_format_supported;
  opensles->iface.SetFormat = audin_opensles_set_format;
  opensles->iface.Close = audin_opensles_close;
  opensles->iface.Free = audin_opensles_free;
  opensles->rdpcontext = pEntryPoints->rdpcontext;
  args = pEntryPoints->args;
 
  if ((error = audin_opensles_parse_addin_args(opensles, args)))
  {
    WLog_Print(opensles->log, WLOG_ERROR,
               "audin_opensles_parse_addin_args failed with errorcode %" PRIu32 "!", error);
    goto error_out;
  }
 
  if ((error = pEntryPoints->pRegisterAudinDevice(pEntryPoints->plugin, (IAudinDevice*)opensles)))
  {
    WLog_Print(opensles->log, WLOG_ERROR, "RegisterAudinDevice failed with error %" PRIu32 "!",
               error);
    goto error_out;
  }
 
  return CHANNEL_RC_OK;
error_out:
  free(opensles);
  return error;
}