| /* |
| * Copyright (c) Stefano Sabatini | stefasab at gmail.com |
| * Copyright (c) S.N. Hemanth Meenakshisundaram | smeenaks at ucsd.edu |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifndef AVFILTER_AUDIO_H |
| #define AVFILTER_AUDIO_H |
| |
| #include "avfilter.h" |
| |
| static const enum AVSampleFormat ff_packed_sample_fmts[] = { |
| AV_SAMPLE_FMT_U8, |
| AV_SAMPLE_FMT_S16, |
| AV_SAMPLE_FMT_S32, |
| AV_SAMPLE_FMT_FLT, |
| AV_SAMPLE_FMT_DBL, |
| AV_SAMPLE_FMT_NONE |
| }; |
| |
| static const enum AVSampleFormat ff_planar_sample_fmts[] = { |
| AV_SAMPLE_FMT_U8P, |
| AV_SAMPLE_FMT_S16P, |
| AV_SAMPLE_FMT_S32P, |
| AV_SAMPLE_FMT_FLTP, |
| AV_SAMPLE_FMT_DBLP, |
| AV_SAMPLE_FMT_NONE |
| }; |
| |
| /** default handler for get_audio_buffer() for audio inputs */ |
| AVFilterBufferRef *ff_default_get_audio_buffer(AVFilterLink *link, int perms, |
| int nb_samples); |
| |
| /** get_audio_buffer() handler for filters which simply pass audio along */ |
| AVFilterBufferRef *ff_null_get_audio_buffer(AVFilterLink *link, int perms, |
| int nb_samples); |
| |
| /** |
| * Request an audio samples buffer with a specific set of permissions. |
| * |
| * @param link the output link to the filter from which the buffer will |
| * be requested |
| * @param perms the required access permissions |
| * @param nb_samples the number of samples per channel |
| * @return A reference to the samples. This must be unreferenced with |
| * avfilter_unref_buffer when you are finished with it. |
| */ |
| AVFilterBufferRef *ff_get_audio_buffer(AVFilterLink *link, int perms, |
| int nb_samples); |
| |
| /** default handler for filter_samples() for audio inputs */ |
| void ff_default_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref); |
| |
| /** filter_samples() handler for filters which simply pass audio along */ |
| void ff_null_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref); |
| |
| /** |
| * Send a buffer of audio samples to the next filter. |
| * |
| * @param link the output link over which the audio samples are being sent |
| * @param samplesref a reference to the buffer of audio samples being sent. The |
| * receiving filter will free this reference when it no longer |
| * needs it or pass it on to the next filter. |
| */ |
| void ff_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref); |
| |
| #endif /* AVFILTER_AUDIO_H */ |