| /* |
| * Copyright (C) 2004-2023 Savoir-faire Linux Inc. |
| * |
| * Author: Emmanuel Milou <emmanuel.milou@savoirfairelinux.com> |
| * Author: Alexandre Savard <alexandre.savard@savoirfairelinux.com> |
| * Author: Philippe Gorley <philippe.gorley@savoirfairelinux.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| |
| #pragma once |
| |
| extern "C" { |
| struct AVFrame; |
| struct SwrContext; |
| } |
| |
| namespace jami { |
| |
| /** |
| * @brief Wrapper class for libswresample |
| */ |
| class Resampler |
| { |
| public: |
| Resampler(); |
| ~Resampler(); |
| |
| /** |
| * @brief Resample a frame. |
| * |
| * Resample from @input format to @output format. |
| * |
| * NOTE: sample_rate, ch_layout, and format should be set on @output |
| */ |
| int resample(const AVFrame* input, AVFrame* output); |
| private: |
| /** |
| * @brief Reinitializes filter according to new format. |
| * |
| * Reinitializes the resampler when new settings are detected. As long as both input and |
| * output formats don't change, this will only be called once. |
| */ |
| void reinit(const AVFrame* in, const AVFrame* out); |
| |
| /** |
| * @brief Libswresample resampler context. |
| * |
| * NOTE SwrContext is an imcomplete type and cannot be stored in a smart pointer. |
| */ |
| SwrContext* swrCtx_; |
| |
| /** |
| * @brief Number of times @swrCtx_ has been initialized with no successful audio resampling. |
| * |
| * 0: Uninitialized |
| * 1: Initialized |
| * >1: Invalid frames or formats, reinit is going to be called in an infinite loop |
| */ |
| unsigned initCount_; |
| }; |
| } // namespace jami |