add api for easy use (#186)

* add api
* update infer limits

api.py

@@ -0,0 +1,117 @@
+import soundfile as sf
+import torch
+import tqdm
+from cached_path import cached_path
+
+from model import DiT, UNetT
+from model.utils import save_spectrogram
+
+from model.utils_infer import load_vocoder, load_model, infer_process, remove_silence_for_generated_wav
+
+
+class F5TTS:
+    def __init__(
+        self,
+        model_type="F5-TTS",
+        ckpt_file="",
+        vocab_file="",
+        ode_method="euler",
+        use_ema=True,
+        local_path=None,
+        device=None,
+    ):
+        # Initialize parameters
+        self.final_wave = None
+        self.target_sample_rate = 24000
+        self.n_mel_channels = 100
+        self.hop_length = 256
+        self.target_rms = 0.1
+
+        # Set device
+        self.device = device or (
+            "cuda" if torch.cuda.is_available() else "mps" if torch.backends.mps.is_available() else "cpu"
+        )
+
+        # Load models
+        self.load_vecoder_model(local_path)
+        self.load_ema_model(model_type, ckpt_file, vocab_file, ode_method, use_ema)
+
+    def load_vecoder_model(self, local_path):
+        self.vocos = load_vocoder(local_path is not None, local_path, self.device)
+
+    def load_ema_model(self, model_type, ckpt_file, vocab_file, ode_method, use_ema):
+        if model_type == "F5-TTS":
+            if not ckpt_file:
+                ckpt_file = str(cached_path("hf://SWivid/F5-TTS/F5TTS_Base/model_1200000.safetensors"))
+            model_cfg = dict(dim=1024, depth=22, heads=16, ff_mult=2, text_dim=512, conv_layers=4)
+            model_cls = DiT
+        elif model_type == "E2-TTS":
+            if not ckpt_file:
+                ckpt_file = str(cached_path("hf://SWivid/E2-TTS/E2TTS_Base/model_1200000.safetensors"))
+            model_cfg = dict(dim=1024, depth=24, heads=16, ff_mult=4)
+            model_cls = UNetT
+        else:
+            raise ValueError(f"Unknown model type: {model_type}")
+
+        self.ema_model = load_model(model_cls, model_cfg, ckpt_file, vocab_file, ode_method, use_ema, self.device)
+
+    def export_wav(self, wav, file_wave, remove_silence=False):
+        if remove_silence:
+            remove_silence_for_generated_wav(file_wave)
+
+        sf.write(file_wave, wav, self.target_sample_rate)
+
+    def export_spectrogram(self, spect, file_spect):
+        save_spectrogram(spect, file_spect)
+
+    def infer(
+        self,
+        ref_file,
+        ref_text,
+        gen_text,
+        sway_sampling_coef=-1,
+        cfg_strength=2,
+        nfe_step=32,
+        speed=1.0,
+        fix_duration=None,
+        remove_silence=False,
+        file_wave=None,
+        file_spect=None,
+        cross_fade_duration=0.15,
+        show_info=print,
+        progress=tqdm,
+    ):
+        wav, sr, spect = infer_process(
+            ref_file,
+            ref_text,
+            gen_text,
+            self.ema_model,
+            cross_fade_duration,
+            speed,
+            show_info,
+            progress,
+            nfe_step,
+            cfg_strength,
+            sway_sampling_coef,
+            fix_duration,
+        )
+
+        if file_wave is not None:
+            self.export_wav(wav, file_wave, remove_silence)
+
+        if file_spect is not None:
+            self.export_spectrogram(spect, file_spect)
+
+        return wav, sr, spect
+
+
+if __name__ == "__main__":
+    f5tts = F5TTS()
+
+    wav, sr, spect = f5tts.infer(
+        ref_file="tests/ref_audio/test_en_1_ref_short.wav",
+        ref_text="some call me nature, others call me mother nature.",
+        gen_text="""I don't really care what you call me. I've been a silent spectator, watching species evolve, empires rise and fall. But always remember, I am mighty and enduring. Respect me and I'll nurture you; ignore me and you shall face the consequences.""",
+        file_wave="tests/out.wav",
+        file_spect="tests/out.png",
+    )

model/utils_infer.py

@@ -38,12 +38,12 @@
 n_mel_channels = 100
 hop_length = 256
 target_rms = 0.1
-nfe_step = 32  # 16, 32
-cfg_strength = 2.0
-ode_method = "euler"
-sway_sampling_coef = -1.0
-speed = 1.0
-fix_duration = None
+# nfe_step = 32  # 16, 32
+# cfg_strength = 2.0
+# ode_method = "euler"
+# sway_sampling_coef = -1.0
+# speed = 1.0
+# fix_duration = None
 
 # -----------------------------------------
 
@@ -84,7 +84,7 @@ def chunk_text(text, max_chars=135):
 # load vocoder
 
 
-def load_vocoder(is_local=False, local_path=""):
+def load_vocoder(is_local=False, local_path="", device=device):
     if is_local:
         print(f"Load vocos from local path {local_path}")
         vocos = Vocos.from_hparams(f"{local_path}/config.yaml")
@@ -100,14 +100,14 @@ def load_vocoder(is_local=False, local_path=""):
 # load model for inference
 
 
-def load_model(model_cls, model_cfg, ckpt_path, vocab_file=""):
+def load_model(model_cls, model_cfg, ckpt_path, vocab_file="", ode_method="euler", use_ema=True, device=device):
     if vocab_file == "":
         vocab_file = "Emilia_ZH_EN"
         tokenizer = "pinyin"
     else:
         tokenizer = "custom"
 
-    print("\nvocab : ", vocab_file, tokenizer)
+    print("\nvocab : ", vocab_file)
     print("tokenizer : ", tokenizer)
     print("model : ", ckpt_path, "\n")
 
@@ -125,7 +125,7 @@ def load_model(model_cls, model_cfg, ckpt_path, vocab_file=""):
         vocab_char_map=vocab_char_map,
     ).to(device)
 
-    model = load_checkpoint(model, ckpt_path, device, use_ema=True)
+    model = load_checkpoint(model, ckpt_path, device, use_ema=use_ema)
 
     return model
 
@@ -178,7 +178,18 @@ def preprocess_ref_audio_text(ref_audio_orig, ref_text, show_info=print):
 
 
 def infer_process(
-    ref_audio, ref_text, gen_text, model_obj, cross_fade_duration=0.15, speed=speed, show_info=print, progress=tqdm
+    ref_audio,
+    ref_text,
+    gen_text,
+    model_obj,
+    cross_fade_duration=0.15,
+    speed=1.0,
+    show_info=print,
+    progress=tqdm,
+    nfe_step=32,
+    cfg_strength=2,
+    sway_sampling_coef=-1,
+    fix_duration=None,
 ):
     # Split the input text into batches
     audio, sr = torchaudio.load(ref_audio)
@@ -188,14 +199,36 @@ def infer_process(
         print(f"gen_text {i}", gen_text)
 
     show_info(f"Generating audio in {len(gen_text_batches)} batches...")
-    return infer_batch_process((audio, sr), ref_text, gen_text_batches, model_obj, cross_fade_duration, speed, progress)
+    return infer_batch_process(
+        (audio, sr),
+        ref_text,
+        gen_text_batches,
+        model_obj,
+        cross_fade_duration,
+        speed,
+        progress,
+        nfe_step,
+        cfg_strength,
+        sway_sampling_coef,
+        fix_duration,
+    )
 
 
 # infer batches
 
 
 def infer_batch_process(
-    ref_audio, ref_text, gen_text_batches, model_obj, cross_fade_duration=0.15, speed=1, progress=tqdm
+    ref_audio,
+    ref_text,
+    gen_text_batches,
+    model_obj,
+    cross_fade_duration=0.15,
+    speed=1,
+    progress=tqdm,
+    nfe_step=32,
+    cfg_strength=2.0,
+    sway_sampling_coef=-1,
+    fix_duration=None,
 ):
     audio, sr = ref_audio
     if audio.shape[0] > 1:
@@ -219,11 +252,14 @@ def infer_batch_process(
         text_list = [ref_text + gen_text]
         final_text_list = convert_char_to_pinyin(text_list)
 
-        # Calculate duration
-        ref_audio_len = audio.shape[-1] // hop_length
-        ref_text_len = len(ref_text.encode("utf-8"))
-        gen_text_len = len(gen_text.encode("utf-8"))
-        duration = ref_audio_len + int(ref_audio_len / ref_text_len * gen_text_len / speed)
+        if fix_duration is not None:
+            duration = int(fix_duration * target_sample_rate / hop_length)
+        else:
+            # Calculate duration
+            ref_audio_len = audio.shape[-1] // hop_length
+            ref_text_len = len(ref_text.encode("utf-8"))
+            gen_text_len = len(gen_text.encode("utf-8"))
+            duration = ref_audio_len + int(ref_audio_len / ref_text_len * gen_text_len / speed)
 
         # inference
         with torch.inference_mode():
@@ -293,8 +329,6 @@ def infer_batch_process(
 
 
 # remove silence from generated wav
-
-
 def remove_silence_for_generated_wav(filename):
     aseg = AudioSegment.from_file(filename)
     non_silent_segs = silence.split_on_silence(aseg, min_silence_len=1000, silence_thresh=-50, keep_silence=500)