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stream_components_output.cpp
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217 lines (174 loc) · 6.08 KB
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#include "stream_components_output.h"
#include "../common/utils.h"
using namespace stream_components;
char *escape_double_quotes_and_backslashes(const char *str) {
if (str == NULL) {
return NULL;
}
size_t escaped_length = strlen(str) + 1;
for (size_t i = 0; str[i] != '\0'; i++) {
if (str[i] == '"' || str[i] == '\\') {
escaped_length++;
}
}
char *escaped = (char *) calloc(escaped_length, 1); // pre-zeroed
if (escaped == NULL) {
return NULL;
}
size_t pos = 0;
for (size_t i = 0; str[i] != '\0'; i++) {
if (str[i] == '"' || str[i] == '\\') {
escaped[pos++] = '\\';
}
escaped[pos++] = str[i];
}
// no need to set zero due to calloc() being used prior
return escaped;
}
// -- WhisperEncoderJSON --
void WhisperEncoderJSON::start_arr(const char *name) {
doindent();
fout << "\"" << name << "\": [\n";
indent++;
}
void WhisperEncoderJSON::end_arr(bool end) {
indent--;
doindent();
fout << (end ? "]\n" : "},\n");
}
void WhisperEncoderJSON::start_obj(const char *name) {
doindent();
if (name) {
fout << "\"" << name << "\": {\n";
} else {
fout << "{\n";
}
indent++;
}
void WhisperEncoderJSON::end_obj(bool end) {
indent--;
doindent();
fout << (end ? "}\n" : "},\n");
}
void WhisperEncoderJSON::start_value(const char *name) {
doindent();
fout << "\"" << name << "\": ";
}
void WhisperEncoderJSON::value_s(const char *name, const char *val, bool end) {
start_value(name);
char *val_escaped = escape_double_quotes_and_backslashes(val);
fout << "\"" << val_escaped << (end ? "\"\n" : "\",\n");
free(val_escaped);
}
void WhisperEncoderJSON::end_value(bool end) {
fout << (end ? "\n" : ",\n");
}
void WhisperEncoderJSON::value_i(const char *name, const int64_t val, bool end) {
start_value(name);
fout << val;
end_value(end);
}
void WhisperEncoderJSON::value_b(const char *name, const bool val, bool end) {
start_value(name);
fout << (val ? "true" : "false");
end_value(end);
}
void WhisperEncoderJSON::value_f(const char *name, const float val, bool end) {
start_value(name);
fout << val;
end_value(end);
}
void WhisperEncoderJSON::doindent() {
for (int i = 0; i < indent; i++) fout << "\t";
}
// -- WhisperStreamOutput --
WhisperStreamOutput::WhisperStreamOutput(
struct whisper_context *ctx,
const service_params ¶ms) :
ctx(ctx),
params(params) {
}
void WhisperStreamOutput::encode_server(
WhisperEncoder &encoder,
const service_params ¶ms,
struct whisper_context *ctx) {
encoder.reset();
encoder.start_obj(nullptr);
encoder.value_s("systeminfo", whisper_print_system_info(), false);
encoder.start_obj("model");
encoder.value_s("type", whisper_model_type_readable(ctx), false);
encoder.value_b("multilingual", whisper_is_multilingual(ctx), false);
encoder.value_i("vocab", whisper_model_n_vocab(ctx), false);
encoder.start_obj("audio");
encoder.value_i("ctx", whisper_model_n_audio_ctx(ctx), false);
encoder.value_i("state", whisper_model_n_audio_state(ctx), false);
encoder.value_i("head", whisper_model_n_audio_head(ctx), false);
encoder.value_i("layer", whisper_model_n_audio_layer(ctx), true);
encoder.end_obj(false);
encoder.start_obj("text");
encoder.value_i("ctx", whisper_model_n_text_ctx(ctx), false);
encoder.value_i("state", whisper_model_n_text_state(ctx), false);
encoder.value_i("head", whisper_model_n_text_head(ctx), false);
encoder.value_i("layer", whisper_model_n_text_layer(ctx), true);
encoder.end_obj(false);
encoder.value_i("mels", whisper_model_n_mels(ctx), false);
encoder.value_i("ftype", whisper_model_ftype(ctx), true);
encoder.end_obj(false);
encoder.start_obj("params");
encoder.value_s("model", params.model.c_str(), false);
encoder.value_s("language", params.language.c_str(), false);
encoder.value_b("translate", params.translate, true);
encoder.end_obj(false);
encoder.end_obj(true);
}
void WhisperStreamOutput::encode_transcription(WhisperEncoder &encoder) const {
encoder.reset();
encoder.start_obj(nullptr);
encoder.start_arr("transcription");
const int n_segments = whisper_full_n_segments(ctx);
for (int i = 0; i < n_segments; ++i) {
const char *text = whisper_full_get_segment_text(ctx, i);
const int64_t t0 = whisper_full_get_segment_t0(ctx, i);
const int64_t t1 = whisper_full_get_segment_t1(ctx, i);
encoder.start_obj(nullptr);
// These don't seem to be useful...
encoder.start_obj("timestamps");
encoder.value_s("from", to_timestamp(t0, true).c_str(), false);
encoder.value_s("to", to_timestamp(t1, true).c_str(), true);
encoder.end_obj(false);
encoder.start_obj("offsets");
encoder.value_i("from", t0 * 10, false);
encoder.value_i("to", t1 * 10, true);
encoder.end_obj(false);
for (int j = 0; j < whisper_full_n_tokens(ctx, i); ++j) {
whisper_token_data token = whisper_full_get_token_data(ctx, i, j);
const char *text = whisper_full_get_token_text(ctx, i, j);
const float p = whisper_full_get_token_p(ctx, i, j);
encoder.start_obj("token");
encoder.value_s("text", text, false);
encoder.value_i("id", token.id, false);
encoder.value_f("confidence", p, false);
encoder.value_i("t0", token.t0, false);
encoder.value_i("t1", token.t1, true);
encoder.end_obj(false);
}
encoder.value_s("text", text, !params.diarize && !params.tinydiarize);
// if (params.diarize && pcmf32s.size() == 2) {
// encoder.value_s("speaker", estimate_diarization_speaker(pcmf32s, t0, t1, true).c_str(), true);
// }
if (params.tinydiarize) {
encoder.value_b("speaker_turn_next", whisper_full_get_segment_speaker_turn_next(ctx, i), true);
}
encoder.end_obj(i == (n_segments - 1));
}
encoder.end_arr(true);
encoder.end_obj(true);
}
void WhisperStreamOutput::to_json(std::ostream &os, const service_params ¶ms, struct whisper_context *ctx) {
WhisperEncoderJSON encoder(os);
WhisperStreamOutput::encode_server(encoder, params, ctx);
}
void WhisperStreamOutput::transcription_to_json(std::ostream &os) const {
WhisperEncoderJSON encoder(os);
encode_transcription(encoder);
}