fc8851e9f4
- Added some code for FFmpeg output that I'm still playing around with. Right now I'm just trying to get it to output to file and try to understand the FFmpeg/libav APIs. Hopefully in the future this plugin can be used for any sort of output to FFmpeg. - Fixed a cast warning in audio-io.c with size_t -> uint32_t - Renamed the 'video_info' and 'audio_info' structures to 'video_conver_info' and 'audio_convert_info' to better represent their actual purpose, and to avoid confusion with 'audio_output_info' and 'video_output_info' structures. - Removed a few macros from obs-def.h that were at one point going to be used but no longer going to be used (at least for now)
145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/******************************************************************************
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Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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#pragma once
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#include "../util/c99defs.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Base audio output component. Use this to create an audio output track
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* for the media.
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*/
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struct audio_output;
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struct audio_line;
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typedef struct audio_output *audio_t;
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typedef struct audio_line *audio_line_t;
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enum audio_format {
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AUDIO_FORMAT_UNKNOWN,
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AUDIO_FORMAT_U8BIT,
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AUDIO_FORMAT_16BIT,
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AUDIO_FORMAT_32BIT,
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AUDIO_FORMAT_FLOAT,
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};
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enum speaker_layout {
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SPEAKERS_UNKNOWN,
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SPEAKERS_MONO,
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SPEAKERS_STEREO,
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SPEAKERS_2POINT1,
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SPEAKERS_QUAD,
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SPEAKERS_4POINT1,
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SPEAKERS_5POINT1,
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SPEAKERS_5POINT1_SURROUND,
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SPEAKERS_7POINT1,
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SPEAKERS_7POINT1_SURROUND,
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SPEAKERS_SURROUND,
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};
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struct audio_data {
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const void *data;
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uint32_t frames;
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uint64_t timestamp;
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float volume;
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};
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struct audio_output_info {
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const char *name;
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uint32_t samples_per_sec;
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enum audio_format format;
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enum speaker_layout speakers;
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uint64_t buffer_ms;
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};
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struct audio_convert_info {
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uint32_t samples_per_sec;
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enum audio_format format;
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enum speaker_layout speakers;
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};
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static inline uint32_t get_audio_channels(enum speaker_layout speakers)
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{
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switch (speakers) {
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case SPEAKERS_MONO: return 1;
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case SPEAKERS_STEREO: return 2;
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case SPEAKERS_2POINT1: return 3;
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case SPEAKERS_SURROUND:
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case SPEAKERS_QUAD: return 4;
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case SPEAKERS_4POINT1: return 5;
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case SPEAKERS_5POINT1:
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case SPEAKERS_5POINT1_SURROUND: return 6;
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case SPEAKERS_7POINT1: return 8;
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case SPEAKERS_7POINT1_SURROUND: return 8;
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case SPEAKERS_UNKNOWN: return 0;
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}
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return 0;
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}
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static inline size_t get_audio_bytes_per_channel(enum audio_format type)
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{
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switch (type) {
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case AUDIO_FORMAT_U8BIT: return 1;
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case AUDIO_FORMAT_16BIT: return 2;
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case AUDIO_FORMAT_FLOAT:
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case AUDIO_FORMAT_32BIT: return 4;
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case AUDIO_FORMAT_UNKNOWN: return 0;
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}
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return 0;
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}
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static inline size_t get_audio_size(enum audio_format type,
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enum speaker_layout speakers, uint32_t frames)
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{
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return get_audio_channels(speakers) *
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get_audio_bytes_per_channel(type) *
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frames;
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}
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#define AUDIO_OUTPUT_SUCCESS 0
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#define AUDIO_OUTPUT_INVALIDPARAM -1
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#define AUDIO_OUTPUT_FAIL -2
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EXPORT int audio_output_open(audio_t *audio, struct audio_output_info *info);
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EXPORT void audio_output_close(audio_t audio);
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EXPORT void audio_output_connect(audio_t video,
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struct audio_convert_info *conversion,
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void (*callback)(void *param, const struct audio_data *data),
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void *param);
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EXPORT void audio_output_disconnect(audio_t video,
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void (*callback)(void *param, const struct audio_data *data),
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void *param);
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EXPORT size_t audio_output_blocksize(audio_t audio);
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EXPORT const struct audio_output_info *audio_output_getinfo(audio_t audio);
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EXPORT audio_line_t audio_output_createline(audio_t audio, const char *name);
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EXPORT void audio_line_destroy(audio_line_t line);
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EXPORT void audio_line_output(audio_line_t line, const struct audio_data *data);
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#ifdef __cplusplus
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}
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#endif
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