From 210a6fb83c1bef566fd6557eab0ba3c9b94ad397 Mon Sep 17 00:00:00 2001 From: Georgi Gerganov Date: Mon, 31 Oct 2022 17:12:21 +0200 Subject: [PATCH] wip : some unsuccessful experiments using DP --- examples/main/main.cpp | 759 ++++++++++++++++++++++++++++------------- 1 file changed, 524 insertions(+), 235 deletions(-) diff --git a/examples/main/main.cpp b/examples/main/main.cpp index d413828d..25cce6a4 100644 --- a/examples/main/main.cpp +++ b/examples/main/main.cpp @@ -49,22 +49,20 @@ void replace_all(std::string & s, const std::string & search, const std::string float voice_length(const std::string & text) { float res = 0.0f; + // letters - add 1 + // digits - add 3 + // else - 0 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; + if (text[i] >= '0' && text[i] <= '9') { + res += 3.0f; + } else if (text[i] >= 'a' && text[i] <= 'z') { + res += 1.0f; + } else if (text[i] >= 'A' && text[i] <= 'Z') { + res += 1.0f; } else { - res += 1.00f; + res += 0.01f; } + // TODO: support unicode } return res; @@ -79,7 +77,7 @@ struct whisper_params { int32_t offset_n = 0; int32_t max_context = -1; - float word_thold = 0.01f; + float word_thold = 0.1f; bool verbose = false; bool translate = false; @@ -320,170 +318,434 @@ bool output_srt(struct whisper_context * ctx, const char * fname, const whisper_ return true; } +struct Interval { + int x0; + int x1; + int type; +}; + +struct IntervalArray : public std::vector { + int F = -1; +}; + +std::vector fit_text_to_audio(const IntervalArray & input, int N, float alpha = 2.0f) { + const int x_max = input.back().x1; + + std::vector ls; + std::vector rs; + std::vector xs; + std::vector gs; + + int G_max = 0; + + for (const auto & ii : input) { + if (ii.type == 0) { + continue; + } + + ls.push_back(ii.x0); + rs.push_back(ii.x1); + xs.push_back(ii.x0); + xs.push_back(ii.x1); + + gs.push_back(G_max); + G_max += ii.x1 - ii.x0; + gs.push_back(G_max); + } + + const int inf = 100*G_max; + + struct Cell { + int fval = -1; + int xprev = -1; + int w = -1; + }; + + // Function F + initial conditions + std::vector> F(xs.size()); + for (auto & Fx : F) { + Fx.resize(N + 1); + for (auto & f : Fx) f.fval = inf; + Fx[0].fval = alpha*G_max; + } + + // DP core + for (int n = 1; n <= N; ++n) { + for (int ix = 0; ix < (int) xs.size(); ++ix) { + const int x = xs[ix]; + + int best_fval = inf; + int best_xprev = -1; + int best_w = -1; + + for (int il = 0; il < (int) ls.size(); ++il) { + const int l = ls[il]; + + if (l < n) continue; + if (l >= x) break; + + for (int ir = il; ir < (int) rs.size(); ++ir) { + const int r = rs[ir]; + + if (r < l + 1) continue; + if (r > x) break; + + const int cur_fval = F[2*il][n - 1].fval + (r - l) - (alpha + 1)*(gs[2*ir + 1] - gs[2*il]); + + if (cur_fval < best_fval) { + best_fval = cur_fval; + best_xprev = 2*il; + best_w = r - l; + } + } + } + + F[ix][n].fval = best_fval; + F[ix][n].xprev = best_xprev; + F[ix][n].w = best_w; + } + } + + // generate output + std::vector res(N + 1); + { + for (int i = 1; i <= N; ++i) { + IntervalArray resCur; + + int n = i; + + std::vector grid(x_max + 1, 0); // initally, everything is background + + int best_ix = 0; + int best_fval = F[0][n].fval; + for (int ix = 1; ix < (int) xs.size(); ++ix) { + if (F[ix][n].fval < best_fval) { + best_ix = ix; + best_fval = F[ix][n].fval; + } + } + + resCur.F = (i == input.size()/2) ? 0 : best_fval; + while (true) { + const int ix = F[best_ix][n].xprev; + const int w = F[best_ix][n].w; + for (int x = xs[ix]; x < xs[ix] + w; ++x) { + grid[x] = 1; // i.e. green + } + best_ix = F[best_ix][n].xprev; + if (--n == 0) break; + } + + int x0 = 0; + int type = grid[0]; + for (int x1 = 1; x1 <= x_max; ++x1) { + if (grid[x1] != grid[x1 - 1] || x1 == x_max) { + if (type == 1) { + resCur.push_back({x0, x1, 1}); + } + x0 = x1; + type = grid[x1]; + } + } + + res[i] = std::move(resCur); + } + } + + return res; +} + + // 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 & pcmf32) { - if (params.output_wts) { - std::vector pcm_avg(pcmf32.size(), 0); + std::vector pcm_avg(pcmf32.size(), 0); - // average the fabs of the signal - { - const int hw = 32; + // 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]); - } + 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); + } + 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 + + void calc_vlen(struct whisper_context * ctx) { + if (id >= whisper_token_eot(ctx)) { + vlen = 0.1f; + return; + } + + vlen = voice_length(text); + } + + bool is_voice() const { + return vlen > 0.5f; + } + }; + + 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(pcm_avg.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) pcm_avg.size(), (int) (t1*WHISPER_SAMPLE_RATE/100)); + + const int n = whisper_full_n_tokens(ctx, i); + + std::vector 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].calc_vlen(ctx); + + 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; } } - struct token_info { - int64_t t0 = -1; - int64_t t1 = -1; + tokens[n - 2].t1 = t1; + tokens[n - 1].t0 = t1; + tokens[n - 1].t1 = t1; - int64_t tt0 = -1; - int64_t tt1 = -1; + t_last = t1; - whisper_token id; - whisper_token tid; + { + { + int p0 = 0; + int p1 = 0; - 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 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; + while (true) { + while (p1 < n && tokens[p1].t1 < 0) { + p1++; } - } - 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; + if (p1 >= n) { + p1--; } - tokens[j].t0 = tt; - tid_last = token.tid; - } - } - tokens[n - 2].t1 = t1; - tokens[n - 1].t0 = t1; - tokens[n - 1].t1 = t1; + if (p1 > p0) { + IntervalArray arr; - t_last = t1; + const int s0 = std::max(0, (int) (tokens[p0].t0*WHISPER_SAMPLE_RATE/100)); + const int s1 = std::min((int) pcm_avg.size() - 1, (int) (tokens[p1].t1*WHISPER_SAMPLE_RATE/100)); + + const int ns = s1 - s0; + + float sum = 0.0f; + for (int k = s0; k < s1; k++) { + sum += pcm_avg[k]; + } + + const float thold = sum/ns; + + printf("segment %4d: s0 = %6d, s1 = %6d, ns = %6d, thold = %f\n", i, s0, s1, ns, thold); + + { + int last_s = -1; + int last_type = -1; + for (int k = s0; k < s1; k++) { + const int type = pcm_avg[k] > thold ? 1 : 0; + + if (type != last_type) { + if (last_type != -1) { + arr.push_back({ last_s, k, last_type }); + } + last_s = k; + last_type = type; + } + } + } + + //for (int k = 0; k < arr.size(); k++) { + // printf(" %4d: %6d, %6d, %d\n", k, arr[k].x0, arr[k].x1, arr[k].type); + //} + + int n_voice = 0; + + for (int j = p0; j <= p1; ++j) { + if (tokens[j].is_voice()) { + n_voice++; + } + } + + if (n_voice > 0 && arr.size() > n_voice) { + printf("xxxxxxxx n = %d, n_voice = %d, arr.size() = %d\n", n, n_voice, (int) arr.size()); + auto res = fit_text_to_audio(arr, n_voice, 2.0f); + printf("done fit_text_to_audio, F = %d\n", res[n_voice].F); + + { + int tid = p0; + for (int k = 0; k < (int) res[n_voice].size(); ++k) { + while (!tokens[tid].is_voice() && tid <= p1) { + //if (tokens[tid].t0 < 0) { + // tokens[tid].t0 = (int64_t) (100*res[n_voice][k].x0/WHISPER_SAMPLE_RATE); + //} + //if (tokens[tid].t1 < 0) { + // tokens[tid].t1 = tokens[tid].t0; + //} + + tid++; + } + + if (tid > p1) { + break; + } + + if (tokens[tid].t0 < 0) { + tokens[tid].t0 = (int64_t) (100*res[n_voice][k].x0/WHISPER_SAMPLE_RATE); + if (tid > 0) { + tokens[tid - 1].t1 = tokens[tid].t0; + } + } + + if (tokens[tid].t1 < 0) { + tokens[tid].t1 = (int64_t) (100*res[n_voice][k].x1/WHISPER_SAMPLE_RATE); + } + + tid++; + } + + printf("xxxxxxxx n = %d, tid = %d\n", n, tid); + } + } + } - 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; + p0 = p1; + if (p1 >= n) { + break; } } + } - p1++; - p0 = p1; - if (p1 >= n) { - break; + { + 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) { + if (tokens[j + 1].t0 < 0) { tokens[j + 1].t0 = tokens[j].t1; } tokens[j].tt0 = tokens[j].t0; tokens[j].tt1 = tokens[j].t1; + + if (j < n - 2) { + tokens[j].tt1 = std::max(tokens[j].tt1, tokens[j + 1].t0); + } } // VAD @@ -495,10 +757,10 @@ bool output_wts(struct whisper_context * ctx, const char * fname, const char * f 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)); + int s1 = std::min((int) pcm_avg.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 ss0 = std::max(0, (int) (t0*WHISPER_SAMPLE_RATE/100) - hw); + const int ss1 = std::min((int) pcm_avg.size() - 1, (int) (t1*WHISPER_SAMPLE_RATE/100) + hw); const int n = ss1 - ss0; @@ -535,7 +797,7 @@ bool output_wts(struct whisper_context * ctx, const char * fname, const char * f { int k = s1; if (pcm_avg[k] > thold) { - while (k < (int) pcmf32.size() - 1 && pcm_avg[k] > thold) { + while (k < (int) pcm_avg.size() - 1 && pcm_avg[k] > thold) { k++; } tokens[j].t1 = 100*k/WHISPER_SAMPLE_RATE; @@ -565,119 +827,146 @@ bool output_wts(struct whisper_context * ctx, const char * fname, const char * f 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()); + { + const std::string fname_tokens = "tokens-" + std::to_string(i) + ".txt"; - if (tokens[j].id >= whisper_token_eot(ctx)) { - continue; + std::ofstream fout(fname_tokens); + + int s0 = std::max(0, (int) (t0*WHISPER_SAMPLE_RATE/100)); + int s1 = std::min((int) pcm_avg.size() - 1, (int) (t1*WHISPER_SAMPLE_RATE/100)); + + for (int j = s0; j < s1; j++) { + int k = -1; + for (int r = 0; r < n; r++) { + if (j >= (int) (tokens[r].t0*WHISPER_SAMPLE_RATE/100) && j < (int) (tokens[r].t1*WHISPER_SAMPLE_RATE/100)) { + k = r; + break; + } } - //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"; + fout << j << " " << pcm_avg[j] << " " << float(k%3 + 1)/30.0 << std::endl; } - static const int line_wrap = 60; - static const char * font = "/System/Library/Fonts/Supplemental/Courier New Bold.ttf"; + fout.close(); + } - if (!is_first) { - fout << ","; + 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; } - // 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 << ")'"; + //printf("[%s --> %s] %s\n", to_timestamp(token.t0).c_str(), to_timestamp(token.t1).c_str(), whisper_token_to_str(ctx, token.id)); - is_first = false; + //fout << "# " << to_timestamp(token.t0) << " --> " << to_timestamp(token.t1) << " " << whisper_token_to_str(ctx, token.id) << "\n"; + } - for (int j = 0; j < n; ++j) { - const auto & token = tokens[j]; + static const int line_wrap = 60; + static const char * font = "/System/Library/Fonts/Supplemental/Courier New Bold.ttf"; - if (tokens[j].id >= whisper_token_eot(ctx)) { - continue; - } + if (!is_first) { + fout << ","; + } - std::string txt_bg; - std::string txt_fg; // highlight token - std::string txt_ul; // underline + // 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 << ")'"; - txt_bg = "> "; - txt_fg = "> "; - txt_ul = "\\ \\ "; + is_first = false; - { - int ncnt = 0; - for (int k = 0; k < n; ++k) { - const auto & token2 = tokens[k]; + for (int j = 0; j < n; ++j) { + const auto & token = tokens[j]; - if (tokens[k].id >= whisper_token_eot(ctx)) { - continue; + if (tokens[j].id >= whisper_token_eot(ctx)) { + continue; + } + + //if (!tokens[j].is_voice()) { + // 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 += "_"; } - - 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; - } + txt_fg += "|"; + } else { + for (int l = 0; l < (int) txt.size(); ++l) { + txt_fg += "\\ "; + txt_ul += "\\ "; } } - ::replace_all(txt_bg, "'", "’"); - ::replace_all(txt_bg, "\"", "\\\""); - ::replace_all(txt_fg, "'", "’"); - ::replace_all(txt_fg, "\"", "\\\""); + ncnt += txt.size(); + + if (ncnt > line_wrap) { + if (k < j) { + txt_bg = "> "; + txt_fg = "> "; + txt_ul = "\\ \\ "; + ncnt = 0; + } else { + break; + } + } } - // 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 << ")'"; + ::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); } + 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; }