EngineX-Iluvatar/enginex_bi_series-sherpa-onnx
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Code refactoring (#74)

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* Don't reset model state and feature extractor on endpointing

* support passing decoding_method from commandline

* Add modified_beam_search to Python API

* fix C API example

* Fix style issues
This commit is contained in:
Fangjun Kuang
2023-03-03 12:10:59 +08:00
committed by GitHub
parent c241f93c40
commit 7f72c13d9a
34 changed files with 744 additions and 374 deletions
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17
ffmpeg-examples/run.sh
View File

@@ -26,12 +26,17 @@ 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
for method in greedy_search modified_beam_search; do
echo "test method: $method"
../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/0.wav \
2 \
$method
done
echo "Decoding a URL"

609
ffmpeg-examples/sherpa-onnx-ffmpeg.c
View File

@@ -7,7 +7,6 @@
#include "sherpa-onnx/c-api/c-api.h"
/*
* Copyright (c) 2010 Nicolas George
* Copyright (c) 2011 Stefano Sabatini
@@ -43,14 +42,15 @@
#include <unistd.h>
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavfilter/buffersink.h>
#include <libavfilter/buffersrc.h>
#include <libavformat/avformat.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 const char *filter_descr =
"aresample=16000,aformat=sample_fmts=s16:channel_layouts=mono";
static AVFormatContext *fmt_ctx;
static AVCodecContext *dec_ctx;
@@ -59,308 +59,172 @@ 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;
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_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;
}
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;
/* 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);
/* 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;
}
/* 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;
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;
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;
}
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 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;
}
/* 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_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(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;
}
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.
*/
/*
* 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 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;
/*
* 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_parse_ptr(filter_graph, filters_descr, &inputs,
&outputs, NULL)) < 0)
goto end;
if ((ret = avfilter_graph_config(filter_graph, 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);
/* 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);
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
return ret;
return ret;
}
static void sherpa_decode_frame(const AVFrame *frame, SherpaOnnxOnlineRecognizer *recognizer,
SherpaOnnxOnlineStream* stream)
{
static void sherpa_decode_frame(const AVFrame *frame,
SherpaOnnxOnlineRecognizer *recognizer,
SherpaOnnxOnlineStream *stream,
SherpaOnnxDisplay *display,
int32_t *segment_id) {
#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);
Reset(recognizer, stream);
}
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);
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);
}
@@ -368,25 +232,180 @@ int main(int argc, char **argv)
SherpaOnnxOnlineRecognizerResult *r =
GetOnlineStreamResult(recognizer, stream);
if (strlen(r->text)) {
fprintf(stderr, "%s\n", r->text);
SherpaOnnxPrint(display, *segment_id, r->text);
}
if (IsEndpoint(recognizer, stream)) {
if (strlen(r->text)) {
++*segment_id;
}
Reset(recognizer, stream);
}
DestroyOnlineRecognizerResult(r);
nb_samples = 0;
}
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;
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 = 1;
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 [decoding_method]]"
"\n\n"
"Default num_threads is 1.\n"
"Valid decoding_method: greedy_search (default), modified_beam_search\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 > 8) {
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.decoding_method = "greedy_search";
if (argc == 8) {
config.decoding_method = argv[7];
}
config.max_active_paths = 4;
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);
SherpaOnnxDisplay *display = CreateDisplay(50);
int32_t segment_id = 0;
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, display,
&segment_id);
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)) {
SherpaOnnxPrint(display, segment_id, r->text);
}
DestroyOnlineRecognizerResult(r);
DestroyDisplay(display);
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);
}
fprintf(stderr, "\n");
return 0;
}