FFUtils.h

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/*
 * =================================================
 * Copyright 2013 tagtraum industries incorporated
 * This file is part of FFSampledSP.
 *
 * FFSampledSP 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.
 *
 * FFSampledSP 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 FFSampledSP; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 * =================================================
 *
 * @author <a href="mailto:hs@tagtraum.com">Hendrik Schreiber</a>
 */

 
#include <jni.h>
#include <math.h>
// see
// http://stackoverflow.com/questions/4585847/g-linking-error-on-mac-while-compiling-ffmpeg
// or
// http://ffmpeg.org/trac/ffmpeg/wiki/Including%20FFmpeg%20headers%20in%20a%20C%2B%2B%20application
 
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavutil/channel_layout.h>
#include <libavutil/opt.h>
#include <libavutil/timestamp.h>
#include <libswresample/swresample.h>

typedef struct {
  // general stuff
  JNIEnv *env;               
  jobject java_instance;     
  jint java_buffer_capacity; 
 
  // decoding
  AVFormatContext *format_context; 
  AVStream *stream;                
  int stream_index;                
  AVCodecContext *decode_context;  
  AVPacket *decode_packet;         
  AVFrame *decode_frame;           
  uint8_t **audio_data;     
  uint64_t decoded_samples; 
  uint64_t timestamp;       
 
  // resampling
  SwrContext *swr_context;    
  uint64_t resampled_samples; 
 
  // encoding
  AVCodecContext *encode_context; 
  AVPacket *encode_packet;        
  AVFrame *encode_frame;          
 
} FFAudioIO;
 
extern const uint32_t CODEC_TAG_DRMS;
 
void logWarning(FFAudioIO *, int, const char *);
 
void logFine(FFAudioIO *, int, const char *);
 
void throwUnsupportedAudioFileExceptionIfError(JNIEnv *, int, const char *);
 
void throwIOExceptionIfError(JNIEnv *, int, const char *);
 
void throwIndexOutOfBoundsExceptionIfError(JNIEnv *, int, int);
 
void throwFileNotFoundExceptionIfError(JNIEnv *, int, const char *);
 
int ff_open_stream(JNIEnv *, AVStream *, AVCodecContext **);
 
int ff_open_format_context(JNIEnv *, AVFormatContext **, const char *, int);
 
int ff_open_file(JNIEnv *, AVFormatContext **, AVStream **, AVCodecContext **,
                 int *, const char *, int);
 
int ff_init_audioio(JNIEnv *, FFAudioIO *);
 
void ff_audioio_free(FFAudioIO *);
 
int ff_fill_buffer(FFAudioIO *);
 
AVCodec *ff_find_encoder(enum AVSampleFormat, int, int, int);
 
int ff_init_encoder(JNIEnv *, FFAudioIO *, AVCodec *);
 
int ff_big_endian(enum AVCodecID);