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Fangjun Kuang
Committed by GitHub
ce4dd176 1 parent c63c4c33

Add ffmpeg example (#61)

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正在显示 13 个修改的文件 包含 632 行增加 和 3 行删除
... ... @@ -141,4 +141,15 @@ for wave in ${waves[@]}; do
4
done
# Decode a URL
if [ $EXE == "sherpa-onnx-ffmpeg" ]; then
time $EXE \
$repo/tokens.txt \
$repo/encoder-epoch-99-avg-1.onnx \
$repo/decoder-epoch-99-avg-1.onnx \
$repo/joiner-epoch-99-avg-1.onnx \
https://huggingface.co/csukuangfj/sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/resolve/main/test_wavs/4.wav \
4
fi
rm -rf $repo
... ...
... ... @@ -10,6 +10,9 @@ on:
- 'CMakeLists.txt'
- 'cmake/**'
- 'sherpa-onnx/csrc/*'
- 'sherpa-onnx/c-api/*'
- 'ffmpeg-examples/**'
- 'c-api-examples/**'
pull_request:
branches:
- master
... ... @@ -19,6 +22,8 @@ on:
- 'CMakeLists.txt'
- 'cmake/**'
- 'sherpa-onnx/csrc/*'
- 'sherpa-onnx/c-api/*'
- 'ffmpeg-examples/**'
concurrency:
group: linux-${{ github.ref }}
... ... @@ -40,6 +45,23 @@ jobs:
with:
fetch-depth: 0
- name: Install ffmpeg
shell: bash
run: |
sudo apt-get install -y software-properties-common
sudo add-apt-repository ppa:savoury1/ffmpeg4
sudo add-apt-repository ppa:savoury1/ffmpeg5
sudo apt-get install -y libavdevice-dev libavutil-dev ffmpeg
pkg-config --modversion libavutil
ffmpeg -version
- name: Show ffmpeg version
shell: bash
run: |
pkg-config --modversion libavutil
ffmpeg -version
- name: Configure CMake
shell: bash
run: |
... ... @@ -56,12 +78,22 @@ jobs:
ls -lh lib
ls -lh bin
cd ../ffmpeg-examples
make
- name: Display dependencies of sherpa-onnx for linux
shell: bash
run: |
file build/bin/sherpa-onnx
readelf -d build/bin/sherpa-onnx
- name: Test sherpa-onnx-ffmpeg
run: |
export PATH=$PWD/ffmpeg-examples:$PATH
export EXE=sherpa-onnx-ffmpeg
.github/scripts/test-online-transducer.sh
- name: Test online transducer
shell: bash
run: |
... ...
... ... @@ -20,3 +20,4 @@ run-*-zipformer.sh
run-zh.sh
decode-file-c-api
run-decode-file-c-api.sh
sherpa-onnx-ffmpeg
... ...
... ... @@ -39,6 +39,7 @@ cmake \
-DBUILD_SHARED_LIBS=OFF \
-DSHERPA_ONNX_ENABLE_TESTS=OFF \
-DSHERPA_ONNX_ENABLE_PYTHON=OFF \
-DSHERPA_ONNX_ENABLE_CHECK=OFF \
-DCMAKE_TOOLCHAIN_FILE=../toolchains/aarch64-linux-gnu.toolchain.cmake \
..
... ...
CUR_DIR :=$(shell pwd)
CFLAGS := -I ../
LDFLAGS := -L ../build/lib
LDFLAGS += -L ../build/_deps/onnxruntime-src/lib
LDFLAGS += -lsherpa-onnx-c-api -lsherpa-onnx-core -lonnxruntime -lkaldi-native-fbank-core
LDFLAGS += -Wl,-rpath,../build/lib
LDFLAGS += -Wl,-rpath,../build/_deps/onnxruntime-src/lib
LDFLAGS += -Wl,-rpath,${CUR_DIR}/../build/lib
LDFLAGS += -Wl,-rpath,${CUR_DIR}/../build/_deps/onnxruntime-src/lib
decode-file-c-api: decode-file-c-api.c
$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
... ...
// c-api-examples/decode-file-c-api.cc
// c-api-examples/decode-file-c-api.c
//
// Copyright (c) 2023 Xiaomi Corporation
// This file shows how to use sherpa-onnx C API
// to decode a file.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
... ...
#!/usr/bin/env bash
set -ex
if [ ! -d ./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20 ]; then
echo "Please download the pre-trained model for testing."
echo "You can refer to"
echo ""
echo "https://k2-fsa.github.io/sherpa/onnx/pretrained_models/zipformer-transducer-models.html#sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20-bilingual-chinese-english"
echo "for help"
exit 1
fi
if [[ ! -f ../build/lib/libsherpa-onnx-core.a && ! -f ../build/lib/libsherpa-onnx-core.dylib && ! -f ../build/lib/libsherpa-onnx-core.so ]]; then
echo "Please build sherpa-onnx first. You can use"
echo ""
echo " cd /path/to/sherpa-onnx"
echo " mkdir build"
echo " cd build"
echo " cmake .."
echo " make -j4"
exit 1
fi
if [ ! -f ./decode-file-c-api ]; then
make
fi
./decode-file-c-api \
./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/tokens.txt \
./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/encoder-epoch-99-avg-1.onnx \
./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/decoder-epoch-99-avg-1.onnx \
./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/joiner-epoch-99-avg-1.onnx \
./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/test_wavs/0.wav
... ...
... ... @@ -12,6 +12,7 @@ function(download_portaudio)
${PROJECT_SOURCE_DIR}/pa_stable_v190700_20210406.tgz
${PROJECT_BINARY_DIR}/pa_stable_v190700_20210406.tgz
/tmp/pa_stable_v190700_20210406.tgz
/star-fj/fangjun/download/github/pa_stable_v190700_20210406.tgz
)
foreach(f IN LISTS possible_file_locations)
... ...
CC=g++
GDB ?= FALSE
# use pkg-config for getting CFLAGS and LDLIBS
SHARED_LIBS=libavdevice \
libavformat \
libavfilter \
libavcodec \
libswresample \
libswscale \
libavutil
ifeq ($(GDB), TRUE)
OPTFLAG += -g
endif
CFLAGS := $(shell pkg-config --cflags $(SHARED_LIBS)) -I.. -Wall -std=c++11 -fopenmp ${OPTFLAG}
LDLIBS := $(shell pkg-config --libs $(SHARED_LIBS))
CUR_DIR :=$(shell pwd)
LDLIBS += -L ../build/lib
LDLIBS += -L ../build/_deps/onnxruntime-src/lib
LDLIBS += -lsherpa-onnx-c-api -lsherpa-onnx-core -lonnxruntime -lkaldi-native-fbank-core
LDLIBS += -Wl,-rpath,${CUR_DIR}/../build/lib
LDLIBS += -Wl,-rpath,${CUR_DIR}/../build/_deps/onnxruntime-src/lib
#Get libavutil version and extract major, minor and micro
LIBAVUTIL_VERSION := $(shell pkg-config --modversion libavutil)
LIBAVUTIL_MAJOR := $(shell echo "$(LIBAVUTIL_VERSION)" | awk -F. '{print $$1}')
LIBAVUTIL_MINOR := $(shell echo "$(LIBAVUTIL_VERSION)" | awk -F. '{print $$2}')
LIBAVUTIL_MICRO := $(shell echo "$(LIBAVUTIL_VERSION)" | awk -F. '{print $$3}')
#Check if libavutil version is 57.28.100 or above
FFMPEG_51_AND_ABOVE = $(shell echo "$(LIBAVUTIL_MAJOR) $(LIBAVUTIL_MINOR) $(LIBAVUTIL_MICRO)" | awk '{if ($$1 > 57 || ($$1 == 57 && $$2 > 28) || ($$1 == 57 && $$2 == 28 && $$3 >= 100)) print "TRUE"; else print "FALSE"}')
ifeq ($(FFMPEG_51_AND_ABOVE), FALSE)
$(error FFmpeg version should be n5.1 or above!)
endif
EXAMPLES=sherpa-onnx-ffmpeg
OBJS=$(addsuffix .o,$(EXAMPLES))
.phony: all clean
all: $(EXAMPLES)
@echo $(EXAMPLES)
$(RM) $(OBJS)
$(EXAMPLES): $(OBJS)
$(CC) $(addsuffix .o,$@) $(CFLAGS) $(LDLIBS) -o $@
%.o : %.c
${CC} ${CFLAGS} -c -o $@ $<
clean:
$(RM) $(EXAMPLES) $(OBJS)
build_info:
@echo "libavutil version: $(LIBAVUTIL_VERSION)"
@echo "Supported examples: $(EXAMPLES)"
... ...
# Introduction
You can use `sherpa-onnx-ffmpeg` to decode a wav, mp3, or even a URL.
See <https://github.com/ossrs/srs>
for more supported formats and protocols, e.g.,
RTMP/WebRTC/HLS/HTTP-FLV/SRT/MPEG-DASH/GB28181.
## How to use
Please have a look at
```
./run.sh
```
... ...
# Fixes for errors
To fix the following error:
```
Package libavdevice was not found in the pkg-config search path.
```
please run
```
sudo apt-get install libavdevice-dev
```
To fix the following error
```
Makefile:28: *** FFmpeg version should be n5.1 or above!. Stop.
```
please run
```
sudo apt-get install software-properties-common
sudo add-apt-repository ppa:savoury1/ffmpeg4
sudo add-apt-repository ppa:savoury1/ffmpeg5
sudo apt-get update
sudo apt-get install ffmpeg --reinstall
sudo apt-get install libavutil-dev --reinstall
```
To fix the following error:
```
ModuleNotFoundError: No module named 'apt_pkg'
```
please run:
```
sudo apt-get install python-apt
```
... ...
#!/usr/bin/env bash
set -ex
if [ ! -d ./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20 ]; then
echo "Please download the pre-trained model for testing."
echo "You can refer to"
echo ""
echo "https://k2-fsa.github.io/sherpa/onnx/pretrained_models/zipformer-transducer-models.html#sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20-bilingual-chinese-english"
echo "for help"
exit 1
fi
if [[ ! -f ../build/lib/libsherpa-onnx-core.a && ! -f ../build/lib/libsherpa-onnx-core.dylib && ! -f ../build/lib/libsherpa-onnx-core.so ]]; then
echo "Please build sherpa-onnx first. You can use"
echo ""
echo " cd /path/to/sherpa-onnx"
echo " mkdir build"
echo " cd build"
echo " cmake .."
echo " make -j4"
exit 1
fi
if [ ! -f ./sherpa-onnx-ffmpeg ]; then
make
fi
../ffmpeg-examples/sherpa-onnx-ffmpeg \
./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/tokens.txt \
./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/encoder-epoch-99-avg-1.onnx \
./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/decoder-epoch-99-avg-1.onnx \
./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/joiner-epoch-99-avg-1.onnx \
./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/test_wavs/4.wav
echo "Decoding a URL"
../ffmpeg-examples/sherpa-onnx-ffmpeg \
./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/tokens.txt \
./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/encoder-epoch-99-avg-1.onnx \
./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/decoder-epoch-99-avg-1.onnx \
./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/joiner-epoch-99-avg-1.onnx \
https://huggingface.co/csukuangfj/sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/resolve/main/test_wavs/4.wav
... ...
// ffmpeg-examples/sherpa-onnx-ffmpeg.c
//
// Copyright (c) 2023 Xiaomi Corporation
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "sherpa-onnx/c-api/c-api.h"
/*
* Copyright (c) 2010 Nicolas George
* Copyright (c) 2011 Stefano Sabatini
* Copyright (c) 2012 Clément Bœsch
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/**
* @file audio decoding and filtering usage example
* @example sherpa-onnx-ffmpeg.c
*
* Demux, decode and filter audio input file, generate a raw audio
* file to be played with ffplay.
*/
#include <unistd.h>
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavfilter/buffersink.h>
#include <libavfilter/buffersrc.h>
#include <libavutil/channel_layout.h>
#include <libavutil/opt.h>
}
static const char *filter_descr = "aresample=16000,aformat=sample_fmts=s16:channel_layouts=mono";
static AVFormatContext *fmt_ctx;
static AVCodecContext *dec_ctx;
AVFilterContext *buffersink_ctx;
AVFilterContext *buffersrc_ctx;
AVFilterGraph *filter_graph;
static int audio_stream_index = -1;
static int open_input_file(const char *filename)
{
const AVCodec *dec;
int ret;
if ((ret = avformat_open_input(&fmt_ctx, filename, NULL, NULL)) < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot open input file %s\n", filename);
return ret;
}
if ((ret = avformat_find_stream_info(fmt_ctx, NULL)) < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot find stream information\n");
return ret;
}
/* select the audio stream */
ret = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_AUDIO, -1, -1, &dec, 0);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot find an audio stream in the input file\n");
return ret;
}
audio_stream_index = ret;
/* create decoding context */
dec_ctx = avcodec_alloc_context3(dec);
if (!dec_ctx)
return AVERROR(ENOMEM);
avcodec_parameters_to_context(dec_ctx, fmt_ctx->streams[audio_stream_index]->codecpar);
/* init the audio decoder */
if ((ret = avcodec_open2(dec_ctx, dec, NULL)) < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot open audio decoder\n");
return ret;
}
return 0;
}
static int init_filters(const char *filters_descr)
{
char args[512];
int ret = 0;
const AVFilter *abuffersrc = avfilter_get_by_name("abuffer");
const AVFilter *abuffersink = avfilter_get_by_name("abuffersink");
AVFilterInOut *outputs = avfilter_inout_alloc();
AVFilterInOut *inputs = avfilter_inout_alloc();
static const enum AVSampleFormat out_sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE };
static const int out_sample_rates[] = { 16000, -1 };
const AVFilterLink *outlink;
AVRational time_base = fmt_ctx->streams[audio_stream_index]->time_base;
filter_graph = avfilter_graph_alloc();
if (!outputs || !inputs || !filter_graph) {
ret = AVERROR(ENOMEM);
goto end;
}
/* buffer audio source: the decoded frames from the decoder will be inserted here. */
if (dec_ctx->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC)
av_channel_layout_default(&dec_ctx->ch_layout, dec_ctx->ch_layout.nb_channels);
ret = snprintf(args, sizeof(args),
"time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=",
time_base.num, time_base.den, dec_ctx->sample_rate,
av_get_sample_fmt_name(dec_ctx->sample_fmt));
av_channel_layout_describe(&dec_ctx->ch_layout, args + ret, sizeof(args) - ret);
ret = avfilter_graph_create_filter(&buffersrc_ctx, abuffersrc, "in",
args, NULL, filter_graph);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer source\n");
goto end;
}
/* buffer audio sink: to terminate the filter chain. */
ret = avfilter_graph_create_filter(&buffersink_ctx, abuffersink, "out",
NULL, NULL, filter_graph);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer sink\n");
goto end;
}
ret = av_opt_set_int_list(buffersink_ctx, "sample_fmts", out_sample_fmts, -1,
AV_OPT_SEARCH_CHILDREN);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot set output sample format\n");
goto end;
}
ret = av_opt_set(buffersink_ctx, "ch_layouts", "mono",
AV_OPT_SEARCH_CHILDREN);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot set output channel layout\n");
goto end;
}
ret = av_opt_set_int_list(buffersink_ctx, "sample_rates", out_sample_rates, -1,
AV_OPT_SEARCH_CHILDREN);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot set output sample rate\n");
goto end;
}
/*
* Set the endpoints for the filter graph. The filter_graph will
* be linked to the graph described by filters_descr.
*/
/*
* The buffer source output must be connected to the input pad of
* the first filter described by filters_descr; since the first
* filter input label is not specified, it is set to "in" by
* default.
*/
outputs->name = av_strdup("in");
outputs->filter_ctx = buffersrc_ctx;
outputs->pad_idx = 0;
outputs->next = NULL;
/*
* The buffer sink input must be connected to the output pad of
* the last filter described by filters_descr; since the last
* filter output label is not specified, it is set to "out" by
* default.
*/
inputs->name = av_strdup("out");
inputs->filter_ctx = buffersink_ctx;
inputs->pad_idx = 0;
inputs->next = NULL;
if ((ret = avfilter_graph_parse_ptr(filter_graph, filters_descr,
&inputs, &outputs, NULL)) < 0)
goto end;
if ((ret = avfilter_graph_config(filter_graph, NULL)) < 0)
goto end;
/* Print summary of the sink buffer
* Note: args buffer is reused to store channel layout string */
outlink = buffersink_ctx->inputs[0];
av_channel_layout_describe(&outlink->ch_layout, args, sizeof(args));
av_log(NULL, AV_LOG_INFO, "Output: srate:%dHz fmt:%s chlayout:%s\n",
(int)outlink->sample_rate,
(char *)av_x_if_null(av_get_sample_fmt_name((AVSampleFormat)outlink->format), "?"),
args);
end:
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
return ret;
}
static void sherpa_decode_frame(const AVFrame *frame, SherpaOnnxOnlineRecognizer *recognizer,
SherpaOnnxOnlineStream* stream)
{
#define N 3200 // 100s. Sample rate is fixed to 16 kHz
static float samples[N];
static int nb_samples = 0;
const int16_t *p = (int16_t*)frame->data[0];
if (frame->nb_samples + nb_samples > N) {
AcceptWaveform(stream, 16000, samples, nb_samples);
while (IsOnlineStreamReady(recognizer, stream)) {
DecodeOnlineStream(recognizer, stream);
}
if (IsEndpoint(recognizer, stream)) {
SherpaOnnxOnlineRecognizerResult *r =
GetOnlineStreamResult(recognizer, stream);
if (strlen(r->text)) {
fprintf(stderr, "%s\n", r->text);
}
DestroyOnlineRecognizerResult(r);
}
nb_samples = 0;
}
for (int i = 0; i < frame->nb_samples; i++) {
samples[nb_samples++] = p[i] / 32768.;
}
}
static inline char *__av_err2str(int errnum)
{
static char str[AV_ERROR_MAX_STRING_SIZE];
memset(str, 0, sizeof(str));
return av_make_error_string(str, AV_ERROR_MAX_STRING_SIZE, errnum);
}
int main(int argc, char **argv)
{
int ret;
int num_threads = 4;
AVPacket *packet = av_packet_alloc();
AVFrame *frame = av_frame_alloc();
AVFrame *filt_frame = av_frame_alloc();
const char *kUsage =
"\n"
"Usage:\n"
" ./sherpa-onnx-ffmpeg \\\n"
" /path/to/tokens.txt \\\n"
" /path/to/encoder.onnx\\\n"
" /path/to/decoder.onnx\\\n"
" /path/to/joiner.onnx\\\n"
" /path/to/foo.wav [num_threads]"
"\n\n"
"Please refer to \n"
"https://k2-fsa.github.io/sherpa/onnx/pretrained_models/index.html\n"
"for a list of pre-trained models to download.\n";
if (!packet || !frame || !filt_frame) {
fprintf(stderr, "Could not allocate frame or packet\n");
exit(1);
}
if (argc < 6 || argc > 7) {
fprintf(stderr, "%s\n", kUsage);
return -1;
}
SherpaOnnxOnlineRecognizerConfig config;
config.model_config.tokens = argv[1];
config.model_config.encoder = argv[2];
config.model_config.decoder = argv[3];
config.model_config.joiner = argv[4];
if (argc == 7 && atoi(argv[6]) > 0) {
num_threads = atoi(argv[6]);
}
config.model_config.num_threads = num_threads;
config.model_config.debug = 0;
config.feat_config.sample_rate = 16000;
config.feat_config.feature_dim = 80;
config.enable_endpoint = 1;
config.rule1_min_trailing_silence = 2.4;
config.rule2_min_trailing_silence = 1.2;
config.rule3_min_utterance_length = 300;
SherpaOnnxOnlineRecognizer *recognizer = CreateOnlineRecognizer(&config);
SherpaOnnxOnlineStream *stream = CreateOnlineStream(recognizer);
if ((ret = open_input_file(argv[5])) < 0)
exit(1);
if ((ret = init_filters(filter_descr)) < 0)
exit(1);
/* read all packets */
while (1) {
if ((ret = av_read_frame(fmt_ctx, packet)) < 0)
break;
if (packet->stream_index == audio_stream_index) {
ret = avcodec_send_packet(dec_ctx, packet);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Error while sending a packet to the decoder\n");
break;
}
while (ret >= 0) {
ret = avcodec_receive_frame(dec_ctx, frame);
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
break;
} else if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Error while receiving a frame from the decoder\n");
exit(1);
}
if (ret >= 0) {
/* push the audio data from decoded frame into the filtergraph */
if (av_buffersrc_add_frame_flags(buffersrc_ctx, frame, AV_BUFFERSRC_FLAG_KEEP_REF) < 0) {
av_log(NULL, AV_LOG_ERROR, "Error while feeding the audio filtergraph\n");
break;
}
/* pull filtered audio from the filtergraph */
while (1) {
ret = av_buffersink_get_frame(buffersink_ctx, filt_frame);
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
break;
if (ret < 0)
exit(1);
sherpa_decode_frame(filt_frame, recognizer, stream);
av_frame_unref(filt_frame);
}
av_frame_unref(frame);
}
}
}
av_packet_unref(packet);
}
// add some tail padding
float tail_paddings[4800] = {0}; // 0.3 seconds at 16 kHz sample rate
AcceptWaveform(stream, 16000, tail_paddings, 4800);
InputFinished(stream);
while (IsOnlineStreamReady(recognizer, stream)) {
DecodeOnlineStream(recognizer, stream);
}
SherpaOnnxOnlineRecognizerResult *r =
GetOnlineStreamResult(recognizer, stream);
if (strlen(r->text)) {
fprintf(stderr, "%s\n", r->text);
}
DestroyOnlineRecognizerResult(r);
DestoryOnlineStream(stream);
DestroyOnlineRecognizer(recognizer);
avfilter_graph_free(&filter_graph);
avcodec_free_context(&dec_ctx);
avformat_close_input(&fmt_ctx);
av_packet_free(&packet);
av_frame_free(&frame);
av_frame_free(&filt_frame);
if (ret < 0 && ret != AVERROR_EOF) {
fprintf(stderr, "Error occurred: %s\n", __av_err2str(ret));
exit(1);
}
return 0;
}
... ...