/*
 * This file is part of Libav.
 *
 * Libav 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.
 *
 * Libav 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 Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVCONV_H
#define AVCONV_H

#include "config.h"

#include <stdint.h>
#include <stdio.h>

#if HAVE_PTHREADS
#include <pthread.h>
#endif

#include "cmdutils.h"

#include "libavformat/avformat.h"
#include "libavformat/avio.h"

#include "libavcodec/avcodec.h"

#include "libavfilter/avfilter.h"

#include "libavutil/avutil.h"
#include "libavutil/dict.h"
#include "libavutil/fifo.h"
#include "libavutil/hwcontext.h"
#include "libavutil/pixfmt.h"
#include "libavutil/rational.h"

#define VSYNC_AUTO       -1
#define VSYNC_PASSTHROUGH 0
#define VSYNC_CFR         1
#define VSYNC_VFR         2

enum HWAccelID {
    HWACCEL_NONE = 0,
    HWACCEL_AUTO,
    HWACCEL_VDPAU,
    HWACCEL_DXVA2,
    HWACCEL_VDA,
    HWACCEL_QSV,
    HWACCEL_VAAPI,
};

typedef struct HWAccel {
    const char *name;
    int (*init)(AVCodecContext *s);
    enum HWAccelID id;
    enum AVPixelFormat pix_fmt;
    enum AVHWDeviceType device_type;
} HWAccel;

typedef struct HWDevice {
    char *name;
    enum AVHWDeviceType type;
    AVBufferRef *device_ref;
} HWDevice;

/* select an input stream for an output stream */
typedef struct StreamMap {
    int disabled;           /* 1 is this mapping is disabled by a negative map */
    int file_index;
    int stream_index;
    int sync_file_index;
    int sync_stream_index;
    char *linklabel;       /* name of an output link, for mapping lavfi outputs */
} StreamMap;

/* select an input file for an output file */
typedef struct MetadataMap {
    int  file;      // file index
    char type;      // type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
    int  index;     // stream/chapter/program number
} MetadataMap;

typedef struct OptionsContext {
    OptionGroup *g;

    /* input/output options */
    int64_t start_time;
    const char *format;

    SpecifierOpt *codec_names;
    int        nb_codec_names;
    SpecifierOpt *audio_channels;
    int        nb_audio_channels;
    SpecifierOpt *audio_sample_rate;
    int        nb_audio_sample_rate;
    SpecifierOpt *frame_rates;
    int        nb_frame_rates;
    SpecifierOpt *frame_sizes;
    int        nb_frame_sizes;
    SpecifierOpt *frame_pix_fmts;
    int        nb_frame_pix_fmts;

    /* input options */
    int64_t input_ts_offset;
    int loop;
    int rate_emu;
    int accurate_seek;

    SpecifierOpt *ts_scale;
    int        nb_ts_scale;
    SpecifierOpt *dump_attachment;
    int        nb_dump_attachment;
    SpecifierOpt *hwaccels;
    int        nb_hwaccels;
    SpecifierOpt *hwaccel_devices;
    int        nb_hwaccel_devices;
    SpecifierOpt *hwaccel_output_formats;
    int        nb_hwaccel_output_formats;
    SpecifierOpt *autorotate;
    int        nb_autorotate;

    /* output options */
    StreamMap *stream_maps;
    int     nb_stream_maps;
    /* first item specifies output metadata, second is input */
    MetadataMap (*meta_data_maps)[2];
    int nb_meta_data_maps;
    int metadata_global_manual;
    int metadata_streams_manual;
    int metadata_chapters_manual;
    const char **attachments;
    int       nb_attachments;

    int chapters_input_file;

    int64_t recording_time;
    uint64_t limit_filesize;
    float mux_preload;
    float mux_max_delay;
    int shortest;

    int video_disable;
    int audio_disable;
    int subtitle_disable;
    int data_disable;

    /* indexed by output file stream index */
    int   *streamid_map;
    int nb_streamid_map;

    SpecifierOpt *metadata;
    int        nb_metadata;
    SpecifierOpt *max_frames;
    int        nb_max_frames;
    SpecifierOpt *bitstream_filters;
    int        nb_bitstream_filters;
    SpecifierOpt *codec_tags;
    int        nb_codec_tags;
    SpecifierOpt *sample_fmts;
    int        nb_sample_fmts;
    SpecifierOpt *qscale;
    int        nb_qscale;
    SpecifierOpt *bitrates;
    int        nb_bitrates;
    SpecifierOpt *forced_key_frames;
    int        nb_forced_key_frames;
    SpecifierOpt *force_fps;
    int        nb_force_fps;
    SpecifierOpt *frame_aspect_ratios;
    int        nb_frame_aspect_ratios;
    SpecifierOpt *rc_overrides;
    int        nb_rc_overrides;
    SpecifierOpt *intra_matrices;
    int        nb_intra_matrices;
    SpecifierOpt *inter_matrices;
    int        nb_inter_matrices;
    SpecifierOpt *top_field_first;
    int        nb_top_field_first;
    SpecifierOpt *metadata_map;
    int        nb_metadata_map;
    SpecifierOpt *presets;
    int        nb_presets;
    SpecifierOpt *copy_initial_nonkeyframes;
    int        nb_copy_initial_nonkeyframes;
    SpecifierOpt *filters;
    int        nb_filters;
    SpecifierOpt *filter_scripts;
    int        nb_filter_scripts;
    SpecifierOpt *pass;
    int        nb_pass;
    SpecifierOpt *passlogfiles;
    int        nb_passlogfiles;
    SpecifierOpt *max_muxing_queue_size;
    int        nb_max_muxing_queue_size;
} OptionsContext;

typedef struct InputFilter {
    AVFilterContext    *filter;
    struct InputStream *ist;
    struct FilterGraph *graph;
    uint8_t            *name;

    AVFifoBuffer *frame_queue;

    // parameters configured for this input
    int format;

    int width, height;
    AVRational sample_aspect_ratio;

    int sample_rate;
    uint64_t channel_layout;

    AVBufferRef *hw_frames_ctx;

    int eof;
} InputFilter;

typedef struct OutputFilter {
    AVFilterContext     *filter;
    struct OutputStream *ost;
    struct FilterGraph  *graph;
    uint8_t             *name;

    /* temporary storage until stream maps are processed */
    AVFilterInOut       *out_tmp;
    enum AVMediaType     type;

    /* desired output stream properties */
    int width, height;
    AVRational frame_rate;
    int format;
    int sample_rate;
    uint64_t channel_layout;

    // those are only set if no format is specified and the encoder gives us multiple options
    int *formats;
    uint64_t *channel_layouts;
    int *sample_rates;
} OutputFilter;

typedef struct FilterGraph {
    int            index;
    const char    *graph_desc;

    AVFilterGraph *graph;

    InputFilter   **inputs;
    int          nb_inputs;
    OutputFilter **outputs;
    int         nb_outputs;
} FilterGraph;

typedef struct InputStream {
    int file_index;
    AVStream *st;
    int discard;             /* true if stream data should be discarded */
    int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
    AVCodecContext *dec_ctx;
    AVCodec *dec;
    AVFrame *decoded_frame;
    AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */

    int64_t       start;     /* time when read started */
    /* predicted dts of the next packet read for this stream or (when there are
     * several frames in a packet) of the next frame in current packet */
    int64_t       next_dts;
    /* dts of the last packet read for this stream */
    int64_t       last_dts;
    int64_t min_pts; /* pts with the smallest value in a current stream */
    int64_t max_pts; /* pts with the higher value in a current stream */

    // when forcing constant input framerate through -r,
    // this contains the pts that will be given to the next decoded frame
    int64_t cfr_next_pts;

    int64_t nb_samples; /* number of samples in the last decoded audio frame before looping */
    PtsCorrectionContext pts_ctx;
    double ts_scale;
    AVDictionary *decoder_opts;
    AVRational framerate;               /* framerate forced with -r */

    int autorotate;

    /* decoded data from this stream goes into all those filters
     * currently video and audio only */
    InputFilter **filters;
    int        nb_filters;

    /* hwaccel options */
    enum HWAccelID hwaccel_id;
    char  *hwaccel_device;
    enum AVPixelFormat hwaccel_output_format;

    /* hwaccel context */
    enum HWAccelID active_hwaccel_id;
    void  *hwaccel_ctx;
    void (*hwaccel_uninit)(AVCodecContext *s);
    int  (*hwaccel_get_buffer)(AVCodecContext *s, AVFrame *frame, int flags);
    int  (*hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame);
    enum AVPixelFormat hwaccel_pix_fmt;
    enum AVPixelFormat hwaccel_retrieved_pix_fmt;
    AVBufferRef *hw_frames_ctx;

    /* stats */
    // combined size of all the packets read
    uint64_t data_size;
    /* number of packets successfully read for this stream */
    uint64_t nb_packets;
    // number of frames/samples retrieved from the decoder
    uint64_t frames_decoded;
    uint64_t samples_decoded;
} InputStream;

typedef struct InputFile {
    AVFormatContext *ctx;
    int eof_reached;      /* true if eof reached */
    int eagain;           /* true if last read attempt returned EAGAIN */
    int ist_index;        /* index of first stream in ist_table */
    int loop;             /* set number of times input stream should be looped */
    int64_t duration;     /* actual duration of the longest stream in a file
                             at the moment when looping happens */
    AVRational time_base; /* time base of the duration */
    int64_t ts_offset;
    int64_t start_time;   /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
    int64_t recording_time;
    int nb_streams;       /* number of stream that avconv is aware of; may be different
                             from ctx.nb_streams if new streams appear during av_read_frame() */
    int rate_emu;
    int accurate_seek;

#if HAVE_PTHREADS
    pthread_t thread;           /* thread reading from this file */
    int finished;               /* the thread has exited */
    int joined;                 /* the thread has been joined */
    pthread_mutex_t fifo_lock;  /* lock for access to fifo */
    pthread_cond_t  fifo_cond;  /* the main thread will signal on this cond after reading from fifo */
    AVFifoBuffer *fifo;         /* demuxed packets are stored here; freed by the main thread */
#endif
} InputFile;

typedef struct OutputStream {
    int file_index;          /* file index */
    int index;               /* stream index in the output file */
    int source_index;        /* InputStream index */
    AVStream *st;            /* stream in the output file */
    int encoding_needed;     /* true if encoding needed for this stream */
    int frame_number;
    /* input pts and corresponding output pts
       for A/V sync */
    // double sync_ipts;        /* dts from the AVPacket of the demuxer in second units */
    struct InputStream *sync_ist; /* input stream to sync against */
    int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
    /* pts of the first frame encoded for this stream, used for limiting
     * recording time */
    int64_t first_pts;
    /* dts of the last packet sent to the muxer */
    int64_t last_mux_dts;
    // the timebase of the packets sent to the muxer
    AVRational mux_timebase;

    int                    nb_bitstream_filters;
    AVBSFContext            **bsf_ctx;

    AVCodecContext *enc_ctx;
    AVCodec *enc;
    int64_t max_frames;
    AVFrame *filtered_frame;

    void  *hwaccel_ctx;

    /* video only */
    AVRational frame_rate;
    int force_fps;
    int top_field_first;

    float frame_aspect_ratio;

    /* forced key frames */
    int64_t *forced_kf_pts;
    int forced_kf_count;
    int forced_kf_index;
    char *forced_keyframes;

    // the bitrate to send to the muxer for streamcopy
    int bitrate_override;

    char *logfile_prefix;
    FILE *logfile;

    OutputFilter *filter;
    char *avfilter;

    int64_t sws_flags;
    AVDictionary *encoder_opts;
    AVDictionary *resample_opts;
    int finished;        /* no more packets should be written for this stream */
    int stream_copy;

    // init_output_stream() has been called for this stream
    // The encoder and the bistream filters have been initialized and the stream
    // parameters are set in the AVStream.
    int initialized;

    const char *attachment_filename;
    int copy_initial_nonkeyframes;

    enum AVPixelFormat pix_fmts[2];

    AVCodecParserContext *parser;
    AVCodecContext       *parser_avctx;

    /* stats */
    // combined size of all the packets written
    uint64_t data_size;
    // number of packets send to the muxer
    uint64_t packets_written;
    // number of frames/samples sent to the encoder
    uint64_t frames_encoded;
    uint64_t samples_encoded;

    /* packet quality factor */
    int quality;

    int max_muxing_queue_size;

    /* the packets are buffered here until the muxer is ready to be initialized */
    AVFifoBuffer *muxing_queue;
} OutputStream;

typedef struct OutputFile {
    AVFormatContext *ctx;
    AVDictionary *opts;
    int ost_index;       /* index of the first stream in output_streams */
    int64_t recording_time; /* desired length of the resulting file in microseconds */
    int64_t start_time;     /* start time in microseconds */
    uint64_t limit_filesize;

    int shortest;

    int header_written;
} OutputFile;

extern InputStream **input_streams;
extern int        nb_input_streams;
extern InputFile   **input_files;
extern int        nb_input_files;

extern OutputStream **output_streams;
extern int         nb_output_streams;
extern OutputFile   **output_files;
extern int         nb_output_files;

extern FilterGraph **filtergraphs;
extern int        nb_filtergraphs;

extern char *vstats_filename;

extern float audio_drift_threshold;
extern float dts_delta_threshold;

extern int audio_volume;
extern int audio_sync_method;
extern int video_sync_method;
extern int do_benchmark;
extern int do_deinterlace;
extern int do_hex_dump;
extern int do_pkt_dump;
extern int copy_ts;
extern int copy_tb;
extern int exit_on_error;
extern int print_stats;
extern int qp_hist;

extern const AVIOInterruptCB int_cb;

extern const OptionDef options[];

extern const HWAccel hwaccels[];
extern int hwaccel_lax_profile_check;
extern AVBufferRef *hw_device_ctx;

void reset_options(OptionsContext *o);
void show_usage(void);

void opt_output_file(void *optctx, const char *filename);

void assert_avoptions(AVDictionary *m);

int guess_input_channel_layout(InputStream *ist);

int configure_filtergraph(FilterGraph *fg);
int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
int filtergraph_is_simple(FilterGraph *fg);
int init_simple_filtergraph(InputStream *ist, OutputStream *ost);
int init_complex_filtergraph(FilterGraph *fg);

int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame);

int avconv_parse_options(int argc, char **argv);

int dxva2_init(AVCodecContext *s);
int vda_init(AVCodecContext *s);
int qsv_init(AVCodecContext *s);
int qsv_transcode_init(OutputStream *ost);

HWDevice *hw_device_get_by_name(const char *name);
int hw_device_init_from_string(const char *arg, HWDevice **dev);
void hw_device_free_all(void);

int hw_device_setup_for_decode(InputStream *ist);
int hw_device_setup_for_encode(OutputStream *ost);

int hwaccel_decode_init(AVCodecContext *avctx);

#endif /* AVCONV_H */