| 57 | } |
| 58 | |
| 59 | std::vector<float> deinterleave_to_planar_channels( |
| 60 | const std::vector<float> & interleaved_samples, |
| 61 | int channel_count) { |
| 62 | if (channel_count <= 0) { |
| 63 | throw std::runtime_error("audio channel count must be positive"); |
| 64 | } |
| 65 | if (interleaved_samples.size() % static_cast<size_t>(channel_count) != 0) { |
| 66 | throw std::runtime_error("interleaved audio sample count must be divisible by channel count"); |
| 67 | } |
| 68 | const int64_t frames = static_cast<int64_t>(interleaved_samples.size() / static_cast<size_t>(channel_count)); |
| 69 | std::vector<float> planar(static_cast<size_t>(frames * channel_count), 0.0F); |
| 70 | #ifdef _OPENMP |
| 71 | #pragma omp parallel for collapse(2) if(frames * channel_count >= 1 << 14) |
| 72 | #endif |
| 73 | for (int64_t frame = 0; frame < frames; ++frame) { |
| 74 | for (int channel = 0; channel < channel_count; ++channel) { |
| 75 | planar[static_cast<size_t>(channel * frames + frame)] = |
| 76 | interleaved_samples[static_cast<size_t>(frame * channel_count + channel)]; |
| 77 | } |
| 78 | } |
| 79 | return planar; |
| 80 | } |
| 81 | |
| 82 | std::vector<float> interleave_planar_channels( |
| 83 | const std::vector<float> & planar_samples, |