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/* Theorafile - Ogg Theora Video Decoder Library
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*
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* Copyright (c) 2017-2021 Ethan Lee.
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* Based on TheoraPlay, Copyright (c) 2011-2016 Ryan C. Gordon.
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*
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* This software is provided 'as-is', without any express or implied warranty.
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* In no event will the authors be held liable for any damages arising from
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* the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software in a
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* product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source distribution.
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*
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* Ethan "flibitijibibo" Lee <flibitijibibo@flibitijibibo.com>
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*
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*/
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#ifndef THEORAFILE_H
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#define THEORAFILE_H
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#include <theora/theoradec.h>
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#include <vorbis/codec.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif /* __cplusplus */
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#ifndef DECLSPEC
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#if defined(_WIN32)
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#define DECLSPEC __declspec(dllexport)
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#else
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#define DECLSPEC
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#endif
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#endif
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/* I/O Handle + Callbacks */
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typedef struct tf_callbacks
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{
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size_t (*read_func) (void *ptr, size_t size, size_t nmemb, void *datasource);
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int (*seek_func) (void *datasource, ogg_int64_t offset, int origin);
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int (*close_func) (void *datasource);
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} tf_callbacks;
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/* File Handle */
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typedef struct OggTheora_File
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{
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/* Current State */
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ogg_sync_state sync;
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ogg_page page;
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int eos;
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/* Stream Data */
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int tpackets;
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int vpackets;
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ogg_stream_state *tstream;
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ogg_stream_state *vstream;
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/* Metadata */
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th_info *tinfo;
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vorbis_info *vinfo;
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th_comment *tcomment;
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vorbis_comment *vcomment;
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/* Track data */
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int vtracks;
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int vtrack;
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int ttracks;
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int ttrack;
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/* Theora Data */
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th_dec_ctx **tdec;
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/* Vorbis Data */
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int vdsp_init;
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vorbis_dsp_state vdsp;
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int vblock_init;
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vorbis_block vblock;
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/* I/O Data */
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tf_callbacks io;
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void *datasource;
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} OggTheora_File;
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/* Open/Close */
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#define TF_EUNKNOWN -1
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#define TF_EUNSUPPORTED -2
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#define TF_ENODATASOURCE -3
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DECLSPEC int tf_open_callbacks(
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void *datasource,
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OggTheora_File *file,
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tf_callbacks io
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);
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DECLSPEC int tf_fopen(
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const char *fname,
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OggTheora_File *file
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);
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DECLSPEC void tf_close(OggTheora_File *file);
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/* File Info */
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DECLSPEC int tf_hasvideo(OggTheora_File *file);
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DECLSPEC int tf_hasaudio(OggTheora_File *file);
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DECLSPEC void tf_videoinfo(
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OggTheora_File *file,
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int *width,
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int *height,
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double *fps,
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th_pixel_fmt *fmt
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);
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DECLSPEC void tf_audioinfo(
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OggTheora_File *file,
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int *channels,
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int *samplerate
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);
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/* Stream State */
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DECLSPEC int tf_eos(OggTheora_File *file);
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DECLSPEC void tf_reset(OggTheora_File *file);
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/* Data Reading
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*
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* Note that these functions are NOT thread-safe! You should put a mutex around
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* these two calls if they are being called from separate threads.
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*
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* Also, `samples` is not measured in frames!
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*/
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DECLSPEC int tf_readvideo(OggTheora_File *file, char *buffer, int numframes);
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DECLSPEC int tf_readaudio(OggTheora_File *file, float *buffer, int samples);
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/* Support for multiple audio tracks in a single file
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*
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* Note that this function is NOT thread-safe! You should put a mutex around it
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* if the file is being accessed from separate threads.
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*
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* Also note that when called mid-stream, switching to the new track may take
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* some time whie it finishes reading the current packet. When starting the
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* decode, setting this _before_ reading should ensure that the track is fully
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* clean without any artifacts from transitioning between tracks.
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*/
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DECLSPEC int tf_setaudiotrack(OggTheora_File *file, int vtrack);
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/* Support for multiple videotracks in a single file
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*
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* Note that this function is NOT thread-safe! You should put a mutex around it
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* if the file is being accessed from separate threads.
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*
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* Also note that when called mid-stream, switching to the new track may take
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* some time whie it finishes reading the current packet. When starting the
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* decode, setting this _before_ reading should ensure that the track is fully
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* clean without any artifacts from transitioning between tracks.
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*/
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DECLSPEC int tf_setvideotrack(OggTheora_File *file, int ttrack);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* THEORAFILE_H */
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