return std::string(buf);
}
+void replace_all(std::string & s, const std::string & search, const std::string & replace) {
+ for (size_t pos = 0; ; pos += replace.length()) {
+ pos = s.find(search, pos);
+ if (pos == std::string::npos) break;
+ s.erase(pos, search.length());
+ s.insert(pos, replace);
+ }
+}
+
+// a cost-function that is high for text that takes longer to pronounce
+float voice_length(const std::string & text) {
+ float res = 0.0f;
+
+ for (size_t i = 0; i < text.size(); ++i) {
+ if (text[i] == ' ') {
+ res += 0.01f;
+ } else if (text[i] == ',') {
+ res += 2.00f;
+ } else if (text[i] == '.') {
+ res += 3.00f;
+ } else if (text[i] == '!') {
+ res += 3.00f;
+ } else if (text[i] == '?') {
+ res += 3.00f;
+ } else if (text[i] >= '0' && text[i] <= '9') {
+ res += 3.00f;
+ } else {
+ res += 1.00f;
+ }
+ }
+
+ return res;
+}
+
// command-line parameters
struct whisper_params {
int32_t seed = -1; // RNG seed, not used currently
int32_t offset_n = 0;
int32_t max_context = -1;
+ float word_thold = 0.01f;
+
bool verbose = false;
bool translate = false;
bool output_txt = false;
bool output_vtt = false;
bool output_srt = false;
+ bool output_wts = false;
bool print_special_tokens = false;
bool print_colors = false;
bool no_timestamps = false;
params.offset_n = std::stoi(argv[++i]);
} else if (arg == "-mc" || arg == "--max-context") {
params.max_context = std::stoi(argv[++i]);
+ } else if (arg == "-wt" || arg == "--word-thold") {
+ params.word_thold = std::stof(argv[++i]);
} else if (arg == "-v" || arg == "--verbose") {
params.verbose = true;
} else if (arg == "--translate") {
params.output_vtt = true;
} else if (arg == "-osrt" || arg == "--output-srt") {
params.output_srt = true;
+ } else if (arg == "-owts" || arg == "--output-words") {
+ params.output_wts = true;
} else if (arg == "-ps" || arg == "--print_special") {
params.print_special_tokens = true;
} else if (arg == "-pc" || arg == "--print_colors") {
fprintf(stderr, " -ot N, --offset-t N time offset in milliseconds (default: %d)\n", params.offset_t_ms);
fprintf(stderr, " -on N, --offset-n N segment index offset (default: %d)\n", params.offset_n);
fprintf(stderr, " -mc N, --max-context N maximum number of text context tokens to store (default: max)\n");
+ fprintf(stderr, " -wt N, --word-thold N word timestamp probability threshold (default: %f)\n", params.word_thold);
fprintf(stderr, " -v, --verbose verbose output\n");
fprintf(stderr, " --translate translate from source language to english\n");
fprintf(stderr, " -otxt, --output-txt output result in a text file\n");
fprintf(stderr, " -ovtt, --output-vtt output result in a vtt file\n");
fprintf(stderr, " -osrt, --output-srt output result in a srt file\n");
+ fprintf(stderr, " -owts, --output-words output word-level timestamps to a text file\n");
fprintf(stderr, " -ps, --print_special print special tokens\n");
fprintf(stderr, " -pc, --print_colors print colors\n");
fprintf(stderr, " -nt, --no_timestamps do not print timestamps\n");
return true;
}
+// word-level timestamps (experimental)
+// TODO: probably still has bugs, needs refactoring, etc..
+// TODO: auto threshold
+// TODO: extra pass to detect unused speech and assign to tokens
+// TODO: font parameter adjustments
+bool output_wts(struct whisper_context * ctx, const char * fname, const char * fname_inp, const whisper_params & params, const std::vector<float> & pcmf32) {
+ if (params.output_wts) {
+ std::vector<float> pcm_avg(pcmf32.size(), 0);
+
+ // average the fabs of the signal
+ {
+ const int hw = 32;
+
+ for (int i = 0; i < pcmf32.size(); i++) {
+ float sum = 0;
+ for (int j = -hw; j <= hw; j++) {
+ if (i + j >= 0 && i + j < pcmf32.size()) {
+ sum += fabs(pcmf32[i + j]);
+ }
+ }
+ pcm_avg[i] = sum/(2*hw + 1);
+ }
+ }
+
+ struct token_info {
+ int64_t t0 = -1;
+ int64_t t1 = -1;
+
+ int64_t tt0 = -1;
+ int64_t tt1 = -1;
+
+ whisper_token id;
+ whisper_token tid;
+
+ float p = 0.0f;
+ float pt = 0.0f;
+ float ptsum = 0.0f;
+
+ std::string text;
+ float vlen = 0.0f; // voice length of this token
+ };
+
+ int64_t t_beg = 0;
+ int64_t t_last = 0;
+
+ whisper_token tid_last = 0;
+
+ std::ofstream fout(fname);
+
+ fprintf(stderr, "%s: saving output to '%s'\n", __func__, fname);
+
+ fout << "!/bin/bash" << "\n";
+ fout << "\n";
+
+ fout << "ffmpeg -i " << fname_inp << " -f lavfi -i color=size=1200x120:duration=" << float(pcmf32.size() + 1000)/WHISPER_SAMPLE_RATE << ":rate=25:color=black -vf \"";
+
+ bool is_first = true;
+
+ for (int i = 0; i < whisper_full_n_segments(ctx); i++) {
+ const int64_t t0 = whisper_full_get_segment_t0(ctx, i);
+ const int64_t t1 = whisper_full_get_segment_t1(ctx, i);
+
+ const char *text = whisper_full_get_segment_text(ctx, i);
+
+ const int s0 = std::max(0, (int) (t0*WHISPER_SAMPLE_RATE/100));
+ const int s1 = std::min((int) pcmf32.size(), (int) (t1*WHISPER_SAMPLE_RATE/100));
+
+ const int n = whisper_full_n_tokens(ctx, i);
+
+ std::vector<token_info> tokens(n);
+
+ if (n <= 1) {
+ continue;
+ }
+
+ for (int j = 0; j < n; ++j) {
+ struct whisper_token_data token = whisper_full_get_token_data(ctx, i, j);
+
+ if (j == 0) {
+ if (token.id == whisper_token_beg(ctx)) {
+ tokens[j ].t0 = t0;
+ tokens[j ].t1 = t0;
+ tokens[j + 1].t0 = t0;
+
+ t_beg = t0;
+ t_last = t0;
+ tid_last = whisper_token_beg(ctx);
+ } else {
+ tokens[j ].t0 = t_last;
+ }
+ }
+
+ const int64_t tt = t_beg + 2*(token.tid - whisper_token_beg(ctx));
+
+ tokens[j].id = token.id;
+ tokens[j].tid = token.tid;
+ tokens[j].p = token.p;
+ tokens[j].pt = token.pt;
+ tokens[j].ptsum = token.ptsum;
+
+ tokens[j].text = whisper_token_to_str(ctx, token.id);
+ //tokens[j].vlen = tokens[j].pt;
+ tokens[j].vlen = voice_length(tokens[j].text);
+
+ if (token.pt > params.word_thold && token.ptsum > 0.01 && token.tid > tid_last) {
+ if (j > 0) {
+ tokens[j - 1].t1 = tt;
+ }
+ tokens[j].t0 = tt;
+ tid_last = token.tid;
+ }
+ }
+
+ tokens[n - 2].t1 = t1;
+ tokens[n - 1].t0 = t1;
+ tokens[n - 1].t1 = t1;
+
+ t_last = t1;
+
+ int p0 = 0;
+ int p1 = 0;
+ while (true) {
+ while (p1 < n && tokens[p1].t1 < 0) {
+ p1++;
+ }
+
+ if (p1 >= n) {
+ p1--;
+ }
+
+ if (p1 > p0) {
+ double psum = 0.0;
+ for (int j = p0; j <= p1; j++) {
+ psum += tokens[j].vlen;
+ }
+
+ //printf("analyzing %d - %d, psum = %f\n", p0, p1, psum);
+
+ const double dt = tokens[p1].t1 - tokens[p0].t0;
+
+ for (int j = p0 + 1; j <= p1; j++) {
+ const double ct = tokens[j - 1].t0 + dt*tokens[j - 1].vlen/psum;
+ //const double ct = tokens[j - 1].t0 + (dt*(j - p0))/(p1 - p0 + 1);
+ //const double ct = tokens[p0].t0 + (dt*(j - p0))/(p1 - p0 + 1);
+
+ tokens[j - 1].t1 = ct;
+ tokens[j ].t0 = ct;
+ }
+ }
+
+ p1++;
+ p0 = p1;
+ if (p1 >= n) {
+ break;
+ }
+ }
+
+ for (int j = 0; j < n - 1; j++) {
+ if (tokens[j].t1 < 0) {
+ tokens[j + 1].t0 = tokens[j].t1;
+ }
+
+ tokens[j].tt0 = tokens[j].t0;
+ tokens[j].tt1 = tokens[j].t1;
+ }
+
+ // VAD
+ {
+ const int hw = WHISPER_SAMPLE_RATE; // take one second of audio around the token
+
+ for (int j = 0; j < n; j++) {
+ const int64_t t0 = tokens[j].t0;
+ const int64_t t1 = tokens[j].t1;
+
+ int s0 = std::max(0, (int) (t0*WHISPER_SAMPLE_RATE/100));
+ int s1 = std::min((int) pcmf32.size() - 1, (int) (t1*WHISPER_SAMPLE_RATE/100));
+
+ const int ss0 = std::max(0, (int) (t0*WHISPER_SAMPLE_RATE/100) - hw);
+ const int ss1 = std::min((int) pcmf32.size() - 1, (int) (t1*WHISPER_SAMPLE_RATE/100) + hw);
+
+ const int n = ss1 - ss0;
+
+ float sum = 0.0f;
+ for (int k = ss0; k < ss1; k++) {
+ sum += pcm_avg[k];
+ }
+
+ const float avg = sum/n;
+
+ const float thold = 0.5*avg;
+
+ {
+ int k = s0;
+ if (pcm_avg[k] > thold && j > 0) {
+ while (k > 0 && pcm_avg[k] > thold) {
+ k--;
+ }
+ tokens[j].t0 = (int64_t) (100*k/WHISPER_SAMPLE_RATE);
+ if (tokens[j].t0 < tokens[j - 1].t1) {
+ tokens[j].t0 = tokens[j - 1].t1;
+ } else {
+ s0 = k;
+ }
+ } else {
+ while (pcm_avg[k] < thold && k < s1) {
+ k++;
+ }
+ s0 = k;
+ tokens[j].t0 = 100*k/WHISPER_SAMPLE_RATE;
+ }
+ }
+
+ {
+ int k = s1;
+ if (pcm_avg[k] > thold) {
+ while (k < (int) pcmf32.size() - 1 && pcm_avg[k] > thold) {
+ k++;
+ }
+ tokens[j].t1 = 100*k/WHISPER_SAMPLE_RATE;
+ if (j < n - 1 && tokens[j].t1 > tokens[j + 1].t0) {
+ tokens[j].t1 = tokens[j + 1].t0;
+ } else {
+ s1 = k;
+ }
+ } else {
+ while (pcm_avg[k] < thold && k > s0) {
+ k--;
+ }
+ s1 = k;
+ tokens[j].t1 = 100*k/WHISPER_SAMPLE_RATE;
+ }
+ }
+ }
+ }
+
+ const int t_expand = 0;
+
+ for (int j = 0; j < n; j++) {
+ if (j > 0) {
+ tokens[j].t0 = std::max(0, (int) (tokens[j].t0 - t_expand));
+ }
+ if (j < n - 1) {
+ tokens[j].t1 = tokens[j].t1 + t_expand;
+ }
+ }
+
+ for (int j = 0; j < n; ++j) {
+ const auto & token = tokens[j];
+ const auto tt = token.pt > params.word_thold && token.ptsum > 0.01 ? whisper_token_to_str(ctx, token.tid) : "[?]";
+ printf("%s: %10s %6.3f %6.3f %6.3f %6.3f %5d %5d '%s'\n", __func__,
+ tt, token.p, token.pt, token.ptsum, token.vlen, (int) token.t0, (int) token.t1, token.text.c_str());
+
+ if (tokens[j].id >= whisper_token_eot(ctx)) {
+ continue;
+ }
+
+ //printf("[%s --> %s] %s\n", to_timestamp(token.t0).c_str(), to_timestamp(token.t1).c_str(), whisper_token_to_str(ctx, token.id));
+
+ //fout << "# " << to_timestamp(token.t0) << " --> " << to_timestamp(token.t1) << " " << whisper_token_to_str(ctx, token.id) << "\n";
+ }
+
+ static const int line_wrap = 60;
+ static const char * font = "/System/Library/Fonts/Supplemental/Courier New Bold.ttf";
+
+ if (!is_first) {
+ fout << ",";
+ }
+
+ // background text
+ fout << "drawtext=fontfile='" << font << "':fontsize=24:fontcolor=gray:x=(w-text_w)/2:y=h/2:text='':enable='between(t," << t0/100.0 << "," << t0/100.0 << ")'";
+
+ is_first = false;
+
+ for (int j = 0; j < n; ++j) {
+ const auto & token = tokens[j];
+
+ if (tokens[j].id >= whisper_token_eot(ctx)) {
+ continue;
+ }
+
+ std::string txt_bg;
+ std::string txt_fg; // highlight token
+ std::string txt_ul; // underline
+
+ txt_bg = "> ";
+ txt_fg = "> ";
+ txt_ul = "\\ \\ ";
+
+ {
+ int ncnt = 0;
+ for (int k = 0; k < n; ++k) {
+ const auto & token2 = tokens[k];
+
+ if (tokens[k].id >= whisper_token_eot(ctx)) {
+ continue;
+ }
+
+ const std::string txt = whisper_token_to_str(ctx, token2.id);
+
+ txt_bg += txt;
+
+ if (k == j) {
+ for (int l = 0; l < (int) txt.size(); ++l) {
+ txt_fg += txt[l];
+ txt_ul += "_";
+ }
+ txt_fg += "|";
+ } else {
+ for (int l = 0; l < (int) txt.size(); ++l) {
+ txt_fg += "\\ ";
+ txt_ul += "\\ ";
+ }
+ }
+
+ ncnt += txt.size();
+
+ if (ncnt > line_wrap) {
+ if (k < j) {
+ txt_bg = "> ";
+ txt_fg = "> ";
+ txt_ul = "\\ \\ ";
+ ncnt = 0;
+ } else {
+ break;
+ }
+ }
+ }
+
+ ::replace_all(txt_bg, "'", "’");
+ ::replace_all(txt_bg, "\"", "\\\"");
+ ::replace_all(txt_fg, "'", "’");
+ ::replace_all(txt_fg, "\"", "\\\"");
+ }
+
+ // background text
+ fout << ",drawtext=fontfile='" << font << "':fontsize=24:fontcolor=gray:x=(w-text_w)/2:y=h/2:text='" << txt_bg << "':enable='between(t," << token.tt0/100.0 << "," << token.tt1/100.0 << ")'";
+
+ // foreground text
+ fout << ",drawtext=fontfile='" << font << "':fontsize=24:fontcolor=lightgreen:x=(w-text_w)/2+8:y=h/2:text='" << txt_fg << "':enable='between(t," << token.t0/100.0 << "," << token.t1/100.0 << ")'";
+
+ // underline
+ fout << ",drawtext=fontfile='" << font << "':fontsize=24:fontcolor=lightgreen:x=(w-text_w)/2+8:y=h/2+16:text='" << txt_ul << "':enable='between(t," << token.t0/100.0 << "," << token.t1/100.0 << ")'";
+ }
+ }
+
+ fout << "\" -c:v libx264 -pix_fmt yuv420p -y " << fname_inp << ".mp4" << "\n";
+
+ fout << "\n\n";
+ fout << "echo \"Your video has been saved to " << fname_inp << ".mp4\"" << "\n";
+ fout << "\n";
+ fout << "echo \" ffplay " << fname_inp << ".mp4\"\n";
+ fout << "\n";
+
+ fout.close();
+
+ fprintf(stderr, "%s: run 'source %s' to generate karaoke video\n", __func__, fname);
+ }
+
+ return true;
+}
+
int main(int argc, char ** argv) {
whisper_params params;
fprintf(stderr, "%s: failed to process audio\n", argv[0]);
return 8;
}
+ }
+ // output stuff
+ {
printf("\n");
// output to text file
const auto fname_srt = fname_inp + ".srt";
output_srt(ctx, fname_srt.c_str(), params);
}
+
+ // output to WTS file
+ if (params.output_wts) {
+ const auto fname_wts = fname_inp + ".wts";
+ output_wts(ctx, fname_wts.c_str(), fname_inp.c_str(), params, pcmf32);
+ }
}
}
overview / pkg / ggml / sources / whisper.cpp / commitdiff