diff options
Diffstat (limited to 'src/common_audio/vad/webrtc_vad.c')
| -rw-r--r-- | src/common_audio/vad/webrtc_vad.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/src/common_audio/vad/webrtc_vad.c b/src/common_audio/vad/webrtc_vad.c new file mode 100644 index 0000000000..dcfbda1128 --- /dev/null +++ b/src/common_audio/vad/webrtc_vad.c @@ -0,0 +1,197 @@ +/* + * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + + +/* + * This file includes the VAD API calls. For a specific function call description, + * see webrtc_vad.h + */ + +#include <stdlib.h> +#include <string.h> + +#include "webrtc_vad.h" +#include "vad_core.h" + +static const int kInitCheck = 42; + +WebRtc_Word16 WebRtcVad_get_version(char *version, size_t size_bytes) +{ + const char my_version[] = "VAD 1.2.0"; + + if (version == NULL) + { + return -1; + } + + if (size_bytes < sizeof(my_version)) + { + return -1; + } + + memcpy(version, my_version, sizeof(my_version)); + return 0; +} + +WebRtc_Word16 WebRtcVad_AssignSize(int *size_in_bytes) +{ + *size_in_bytes = sizeof(VadInstT) * 2 / sizeof(WebRtc_Word16); + return 0; +} + +WebRtc_Word16 WebRtcVad_Assign(VadInst **vad_inst, void *vad_inst_addr) +{ + + if (vad_inst == NULL) + { + return -1; + } + + if (vad_inst_addr != NULL) + { + *vad_inst = (VadInst*)vad_inst_addr; + return 0; + } else + { + return -1; + } +} + +WebRtc_Word16 WebRtcVad_Create(VadInst **vad_inst) +{ + + VadInstT *vad_ptr = NULL; + + if (vad_inst == NULL) + { + return -1; + } + + *vad_inst = NULL; + + vad_ptr = (VadInstT *)malloc(sizeof(VadInstT)); + *vad_inst = (VadInst *)vad_ptr; + + if (vad_ptr == NULL) + { + return -1; + } + + vad_ptr->init_flag = 0; + + return 0; +} + +WebRtc_Word16 WebRtcVad_Free(VadInst *vad_inst) +{ + + if (vad_inst == NULL) + { + return -1; + } + + free(vad_inst); + return 0; +} + +WebRtc_Word16 WebRtcVad_Init(VadInst *vad_inst) +{ + short mode = 0; // Default high quality + + if (vad_inst == NULL) + { + return -1; + } + + return WebRtcVad_InitCore((VadInstT*)vad_inst, mode); +} + +WebRtc_Word16 WebRtcVad_set_mode(VadInst *vad_inst, WebRtc_Word16 mode) +{ + VadInstT* vad_ptr; + + if (vad_inst == NULL) + { + return -1; + } + + vad_ptr = (VadInstT*)vad_inst; + if (vad_ptr->init_flag != kInitCheck) + { + return -1; + } + + return WebRtcVad_set_mode_core((VadInstT*)vad_inst, mode); +} + +WebRtc_Word16 WebRtcVad_Process(VadInst *vad_inst, + WebRtc_Word16 fs, + WebRtc_Word16 *speech_frame, + WebRtc_Word16 frame_length) +{ + WebRtc_Word16 vad; + VadInstT* vad_ptr; + + if (vad_inst == NULL) + { + return -1; + } + + vad_ptr = (VadInstT*)vad_inst; + if (vad_ptr->init_flag != kInitCheck) + { + return -1; + } + + if (speech_frame == NULL) + { + return -1; + } + + if (fs == 32000) + { + if ((frame_length != 320) && (frame_length != 640) && (frame_length != 960)) + { + return -1; + } + vad = WebRtcVad_CalcVad32khz((VadInstT*)vad_inst, speech_frame, frame_length); + + } else if (fs == 16000) + { + if ((frame_length != 160) && (frame_length != 320) && (frame_length != 480)) + { + return -1; + } + vad = WebRtcVad_CalcVad16khz((VadInstT*)vad_inst, speech_frame, frame_length); + + } else if (fs == 8000) + { + if ((frame_length != 80) && (frame_length != 160) && (frame_length != 240)) + { + return -1; + } + vad = WebRtcVad_CalcVad8khz((VadInstT*)vad_inst, speech_frame, frame_length); + + } else + { + return -1; // Not a supported sampling frequency + } + + if (vad > 0) + { + return 1; + } else if (vad == 0) + { + return 0; + } else + { + return -1; + } +} |