scrub controls, no segfaults
haldean
5 months ago
| 20 | 20 | context::context() { |
| 21 | 21 | _nodes.push_back(std::make_shared<qb::audio_node>(this, "test/coc-mono.wav")); |
| 22 | 22 | qb::theme::setdefault(); |
| 23 | ImGui::GetIO().KeyRepeatRate = 1.0f / _framerate; | |
| 23 | 24 | } |
| 24 | 25 | |
| 25 | 26 | int context::frame2pixel(double frame) { |
| 44 | 45 | ImGui::Begin("MainWindow", nullptr, |
| 45 | 46 | ImGuiWindowFlags_NoDecoration); |
| 46 | 47 | |
| 47 | if (!audioinit) { | |
| 48 | initaudio(); | |
| 49 | } | |
| 50 | if (audioinit) { | |
| 51 | if (ImGui::IsKeyPressed(SAPP_KEYCODE_SPACE, /* repeat */ false)) { | |
| 52 | playing = !playing; | |
| 53 | } | |
| 54 | pushaudio(); | |
| 55 | } | |
| 56 | ||
| 57 | 48 | double minframe = 0; |
| 58 | 49 | double maxframe = 0; |
| 59 | 50 | for (const auto &n : _nodes) { |
| 60 | 51 | minframe = std::min(minframe, (double) n->minframe()); |
| 61 | 52 | maxframe = std::max(maxframe, (double) n->maxframe()); |
| 53 | } | |
| 54 | ||
| 55 | if (!audioinit) { | |
| 56 | initaudio(); | |
| 57 | } | |
| 58 | if (audioinit) { | |
| 59 | if (ImGui::IsKeyPressed(SAPP_KEYCODE_SPACE, /* repeat */ false)) { | |
| 60 | playing = !playing; | |
| 61 | } | |
| 62 | if (!playing) { | |
| 63 | if (ImGui::IsKeyPressed(SAPP_KEYCODE_LEFT)) { | |
| 64 | playhead = floor(playhead) - 1.0; | |
| 65 | } else if (ImGui::IsKeyPressed(SAPP_KEYCODE_RIGHT)) { | |
| 66 | playhead = floor(playhead) + 1.0; | |
| 67 | } else if (ImGui::IsKeyPressed(SAPP_KEYCODE_UP)) { | |
| 68 | playhead = minframe; | |
| 69 | } else if (ImGui::IsKeyPressed(SAPP_KEYCODE_DOWN)) { | |
| 70 | playhead = maxframe; | |
| 71 | } | |
| 72 | } else { | |
| 73 | if (playhead > maxframe) { | |
| 74 | playing = false; | |
| 75 | } | |
| 76 | } | |
| 77 | pushaudio(); | |
| 62 | 78 | } |
| 63 | 79 | |
| 64 | 80 | if (ImGui::IsMouseDragging(ImGuiMouseButton_Middle)) { |
| 130 | 146 | |
| 131 | 147 | const int samplerate = audiosource->data()->getSampleRate(); |
| 132 | 148 | const double sampleperframe = (double) samplerate / (double) _framerate; |
| 149 | const std::vector<float> &s = audiosource->packed(); | |
| 133 | 150 | |
| 134 | 151 | if (!playing) { |
| 135 | 152 | if ((int) playhead == playedframe) { |
| 137 | 154 | } |
| 138 | 155 | const double firstsample = floor(playhead) * sampleperframe; |
| 139 | 156 | const size_t s0 = (size_t) floor(firstsample); |
| 140 | ||
| 141 | const int topush = (int) sampleperframe; | |
| 142 | const int pushed = | |
| 143 | saudio_push(&audiosource->packed()[s0], topush); | |
| 157 | if (s0 >= s.size()) { | |
| 158 | return; | |
| 159 | } | |
| 160 | const int topush = std::min((int) sampleperframe, (int) (s.size() - s0)); | |
| 161 | const int pushed = saudio_push(&s[s0], topush); | |
| 144 | 162 | playedframe = (int) playhead; |
| 145 | 163 | pushedsample = (int64_t) (s0 + sampleperframe - 1); |
| 146 | 164 | |
| 147 | 165 | } else { |
| 148 | ||
| 149 | 166 | const double elapsed = ImGui::GetIO().DeltaTime; |
| 150 | 167 | playhead += elapsed * _framerate; |
| 151 | 168 | |
| 152 | 169 | const int64_t nextsample = (int64_t) floor(playhead * sampleperframe); |
| 153 | 170 | |
| 154 | 171 | // buffer 125ms of audio |
| 155 | const int buffersamples = samplerate / 8; | |
| 172 | const int64_t buffersamples = samplerate / 8; | |
| 156 | 173 | // add to buffer whenever we have less than 50ms left in the buffer |
| 157 | const int bufferrefill = samplerate / 20; | |
| 158 | ||
| 174 | const int64_t bufferrefill = samplerate / 20; | |
| 175 | ||
| 176 | int64_t fillfrom = -1; | |
| 177 | int64_t dist = pushedsample - nextsample; | |
| 159 | 178 | if (pushedsample < 0) { |
| 160 | int pushed = saudio_push(&audiosource->packed()[nextsample], buffersamples); | |
| 161 | pushedsample = nextsample + pushed; | |
| 162 | } else if (pushedsample - nextsample < bufferrefill) { | |
| 163 | int pushed = saudio_push(&audiosource->packed()[pushedsample + 1], buffersamples); | |
| 164 | pushedsample += pushed; | |
| 179 | fillfrom = nextsample; | |
| 180 | } else if (dist < bufferrefill) { | |
| 181 | fillfrom = pushedsample + 1; | |
| 182 | } | |
| 183 | ||
| 184 | if (fillfrom >= 0 && (size_t) fillfrom < s.size()) { | |
| 185 | const int fillamount = | |
| 186 | (int) std::min(buffersamples, (int64_t)(s.size() - fillfrom - 1)); | |
| 187 | const int pushed = saudio_push(&s[fillfrom], fillamount); | |
| 188 | pushedsample = fillfrom + pushed; | |
| 165 | 189 | } |
| 166 | 190 | } |
| 167 | 191 | } |