avilib.h
来自「gaca源码」· C头文件 代码 · 共 435 行
H
435 行
/*
* avilib.h
*
* Copyright (C) Thomas 謘treich - June 2001
* multiple audio track support Copyright (C) 2002 Thomas 謘treich
*
* Original code:
* Copyright (C) 1999 Rainer Johanni <Rainer@Johanni.de>
*
* This file is part of transcode, a linux video stream processing tool
*
* transcode 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, or (at your option)
* any later version.
*
* transcode 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 this library; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef _GF_AVILIB_H_
#define _GF_AVILIB_H_
#include <gpac/tools.h>
#define AVI_MAX_TRACKS 8
typedef struct
{
u64 key;
u64 pos;
u64 len;
} video_index_entry;
typedef struct
{
u64 pos;
u64 len;
u64 tot;
} audio_index_entry;
// Index types
#define AVI_INDEX_OF_INDEXES 0x00 // when each entry in aIndex
// array points to an index chunk
#define AVI_INDEX_OF_CHUNKS 0x01 // when each entry in aIndex
// array points to a chunk in the file
#define AVI_INDEX_IS_DATA 0x80 // when each entry is aIndex is
// really the data
// bIndexSubtype codes for INDEX_OF_CHUNKS
//
#define AVI_INDEX_2FIELD 0x01 // when fields within frames
// are also indexed
typedef struct _avisuperindex_entry {
u64 qwOffset; // absolute file offset
u32 dwSize; // size of index chunk at this offset
u32 dwDuration; // time span in stream ticks
} avisuperindex_entry;
typedef struct _avistdindex_entry {
u32 dwOffset; // qwBaseOffset + this is absolute file offset
u32 dwSize; // bit 31 is set if this is NOT a keyframe
} avistdindex_entry;
// Standard index
typedef struct _avistdindex_chunk {
char fcc[4]; // ix##
u32 dwSize; // size of this chunk
u16 wLongsPerEntry; // must be sizeof(aIndex[0])/sizeof(DWORD)
u8 bIndexSubType; // must be 0
u8 bIndexType; // must be AVI_INDEX_OF_CHUNKS
u32 nEntriesInUse; //
char dwChunkId[4]; // '##dc' or '##db' or '##wb' etc..
u64 qwBaseOffset; // all dwOffsets in aIndex array are relative to this
u32 dwReserved3; // must be 0
avistdindex_entry *aIndex;
} avistdindex_chunk;
// Base Index Form 'indx'
typedef struct _avisuperindex_chunk {
char fcc[4];
u32 dwSize; // size of this chunk
u16 wLongsPerEntry; // size of each entry in aIndex array (must be 8 for us)
u8 bIndexSubType; // future use. must be 0
u8 bIndexType; // one of AVI_INDEX_* codes
u32 nEntriesInUse; // index of first unused member in aIndex array
char dwChunkId[4]; // fcc of what is indexed
u32 dwReserved[3]; // meaning differs for each index type/subtype.
// 0 if unused
avisuperindex_entry *aIndex; // where are the ix## chunks
avistdindex_chunk **stdindex; // the ix## chunks itself (array)
} avisuperindex_chunk;
typedef struct track_s
{
long a_fmt; /* Audio format, see #defines below */
long a_chans; /* Audio channels, 0 for no audio */
long a_rate; /* Rate in Hz */
long a_bits; /* bits per audio sample */
long mp3rate; /* mp3 bitrate kbs*/
long a_vbr; /* 0 == no Variable BitRate */
long padrate; /* byte rate used for zero padding */
long audio_strn; /* Audio stream number */
u64 audio_bytes; /* Total number of bytes of audio data */
long audio_chunks; /* Chunks of audio data in the file */
char audio_tag[4]; /* Tag of audio data */
long audio_posc; /* Audio position: chunk */
long audio_posb; /* Audio position: byte within chunk */
u64 a_codech_off; /* absolut offset of audio codec information */
u64 a_codecf_off; /* absolut offset of audio codec information */
audio_index_entry *audio_index;
avisuperindex_chunk *audio_superindex;
} track_t;
typedef struct
{
u32 bi_size;
u32 bi_width;
u32 bi_height;
u16 bi_planes;
u16 bi_bit_count;
u32 bi_compression;
u32 bi_size_image;
u32 bi_x_pels_per_meter;
u32 bi_y_pels_per_meter;
u32 bi_clr_used;
u32 bi_clr_important;
} alBITMAPINFOHEADER;
typedef struct
{
u16 w_format_tag;
u16 n_channels;
u32 n_samples_per_sec;
u32 n_avg_bytes_per_sec;
u16 n_block_align;
u16 w_bits_per_sample;
u16 cb_size;
} alWAVEFORMATEX;
typedef struct
{
u32 fcc_type;
u32 fcc_handler;
u32 dw_flags;
u32 dw_caps;
u16 w_priority;
u16 w_language;
u32 dw_scale;
u32 dw_rate;
u32 dw_start;
u32 dw_length;
u32 dw_initial_frames;
u32 dw_suggested_buffer_size;
u32 dw_quality;
u32 dw_sample_size;
u16 dw_left;
u16 dw_top;
u16 dw_right;
u16 dw_bottom;
} alAVISTREAMHEADER;
typedef struct
{
FILE *fdes; /* File descriptor of AVI file */
long mode; /* 0 for reading, 1 for writing */
long width; /* Width of a video frame */
long height; /* Height of a video frame */
double fps; /* Frames per second */
char compressor[8]; /* Type of compressor, 4 bytes + padding for 0 byte */
char compressor2[8]; /* Type of compressor, 4 bytes + padding for 0 byte */
u32 video_strn; /* Video stream number */
long video_frames; /* Number of video frames */
char video_tag[4]; /* Tag of video data */
long video_pos; /* Number of next frame to be read
(if index present) */
alAVISTREAMHEADER video_stream_header;
u32 max_len; /* maximum video chunk present */
track_t track[AVI_MAX_TRACKS]; // up to AVI_MAX_TRACKS audio tracks supported
s64 pos; /* position in file */
long n_idx; /* number of index entries actually filled */
long max_idx; /* number of index entries actually allocated */
s64 v_codech_off; /* absolut offset of video codec (strh) info */
s64 v_codecf_off; /* absolut offset of video codec (strf) info */
u8 (*idx)[16]; /* index entries (AVI idx1 tag) */
video_index_entry *video_index;
avisuperindex_chunk *video_superindex; /* index of indices */
int is_opendml; /* set to 1 if this is an odml file with multiple index chunks */
s64 last_pos; /* Position of last frame written */
u32 last_len; /* Length of last frame written */
int must_use_index; /* Flag if frames are duplicated */
s64 movi_start;
int total_frames; /* total number of frames if dmlh is present */
u32 anum; // total number of audio tracks
u32 aptr; // current audio working track
char *index_file; // read the avi index from this file
alBITMAPINFOHEADER *bitmap_info_header;
alWAVEFORMATEX *wave_format_ex[AVI_MAX_TRACKS];
alAVISTREAMHEADER stream_headers[AVI_MAX_TRACKS];
void* extradata;
unsigned long extradata_size;
} avi_t;
#define AVI_MODE_WRITE 0
#define AVI_MODE_READ 1
/* The error codes delivered by avi_open_input_file */
#define AVI_ERR_SIZELIM 1 /* The write of the data would exceed
the maximum size of the AVI file.
This is more a warning than an error
since the file may be closed safely */
#define AVI_ERR_OPEN 2 /* Error opening the AVI file - wrong path
name or file nor readable/writable */
#define AVI_ERR_READ 3 /* Error reading from AVI File */
#define AVI_ERR_WRITE 4 /* Error writing to AVI File,
disk full ??? */
#define AVI_ERR_WRITE_INDEX 5 /* Could not write index to AVI file
during close, file may still be
usable */
#define AVI_ERR_CLOSE 6 /* Could not write header to AVI file
or not truncate the file during close,
file is most probably corrupted */
#define AVI_ERR_NOT_PERM 7 /* Operation not permitted:
trying to read from a file open
for writing or vice versa */
#define AVI_ERR_NO_MEM 8 /* malloc failed */
#define AVI_ERR_NO_AVI 9 /* Not an AVI file */
#define AVI_ERR_NO_HDRL 10 /* AVI file has no has no header list,
corrupted ??? */
#define AVI_ERR_NO_MOVI 11 /* AVI file has no has no MOVI list,
corrupted ??? */
#define AVI_ERR_NO_VIDS 12 /* AVI file contains no video data */
#define AVI_ERR_NO_IDX 13 /* The file has been opened with
getIndex==0, but an operation has been
performed that needs an index */
/* Possible Audio formats */
#ifndef WAVE_FORMAT_PCM
#define WAVE_FORMAT_UNKNOWN (0x0000)
#ifndef WAVE_FORMAT_PCM
#define WAVE_FORMAT_PCM (0x0001)
#endif
#define WAVE_FORMAT_ADPCM (0x0002)
#define WAVE_FORMAT_IBM_CVSD (0x0005)
#define WAVE_FORMAT_ALAW (0x0006)
#define WAVE_FORMAT_MULAW (0x0007)
#define WAVE_FORMAT_OKI_ADPCM (0x0010)
#define WAVE_FORMAT_DVI_ADPCM (0x0011)
#define WAVE_FORMAT_DIGISTD (0x0015)
#define WAVE_FORMAT_DIGIFIX (0x0016)
#define WAVE_FORMAT_YAMAHA_ADPCM (0x0020)
#define WAVE_FORMAT_DSP_TRUESPEECH (0x0022)
#define WAVE_FORMAT_GSM610 (0x0031)
#define IBM_FORMAT_MULAW (0x0101)
#define IBM_FORMAT_ALAW (0x0102)
#define IBM_FORMAT_ADPCM (0x0103)
#endif
avi_t* AVI_open_output_file(char * filename);
void AVI_set_video(avi_t *AVI, int width, int height, double fps, char *compressor);
void AVI_set_audio(avi_t *AVI, int channels, long rate, int bits, int format, long mp3rate);
int AVI_write_frame(avi_t *AVI, char *data, long bytes, int keyframe);
int AVI_dup_frame(avi_t *AVI);
int AVI_write_audio(avi_t *AVI, char *data, long bytes);
int AVI_append_audio(avi_t *AVI, char *data, long bytes);
u64 AVI_bytes_remain(avi_t *AVI);
int AVI_close(avi_t *AVI);
u64 AVI_bytes_written(avi_t *AVI);
avi_t *AVI_open_input_file(char *filename, int getIndex);
avi_t *AVI_open_input_indexfile(char *filename, int getIndex, char *indexfile);
avi_t *AVI_open_fd(FILE *fd, int getIndex);
avi_t *AVI_open_indexfd(FILE *fd, int getIndex, char *indexfile);
int avi_parse_input_file(avi_t *AVI, int getIndex);
int avi_parse_index_from_file(avi_t *AVI, char *filename);
long AVI_audio_mp3rate(avi_t *AVI);
long AVI_audio_padrate(avi_t *AVI);
long AVI_video_frames(avi_t *AVI);
int AVI_video_width(avi_t *AVI);
int AVI_video_height(avi_t *AVI);
double AVI_frame_rate(avi_t *AVI);
char* AVI_video_compressor(avi_t *AVI);
int AVI_audio_channels(avi_t *AVI);
int AVI_audio_bits(avi_t *AVI);
int AVI_audio_format(avi_t *AVI);
long AVI_audio_rate(avi_t *AVI);
u64 AVI_audio_bytes(avi_t *AVI);
long AVI_audio_chunks(avi_t *AVI);
int AVI_can_read_audio(avi_t *AVI);
long AVI_max_video_chunk(avi_t *AVI);
long AVI_frame_size(avi_t *AVI, long frame);
long AVI_audio_size(avi_t *AVI, long frame);
int AVI_seek_start(avi_t *AVI);
int AVI_set_video_position(avi_t *AVI, long frame);
u64 AVI_get_video_position(avi_t *AVI, long frame);
long AVI_read_frame(avi_t *AVI, char *vidbuf, int *keyframe);
int AVI_set_audio_position(avi_t *AVI, long byte);
int AVI_set_audio_bitrate(avi_t *AVI, long bitrate);
long AVI_get_audio_position_index(avi_t *AVI);
int AVI_set_audio_position_index(avi_t *AVI, long indexpos);
long AVI_read_audio(avi_t *AVI, char *audbuf, long bytes, int *continuous);
int AVI_read_data(avi_t *AVI, char *vidbuf, long max_vidbuf,
char *audbuf, long max_audbuf,
long *len);
int AVI_scan(char *name);
int AVI_dump(char *name, int mode);
char *AVI_codec2str(short cc);
int AVI_file_check(char *import_file);
void AVI_info(avi_t *avifile);
u64 AVI_max_size(void);
int avi_update_header(avi_t *AVI);
int AVI_set_audio_track(avi_t *AVI, u32 track);
int AVI_get_audio_track(avi_t *AVI);
int AVI_audio_tracks(avi_t *AVI);
void AVI_set_audio_vbr(avi_t *AVI, long is_vbr);
long AVI_get_audio_vbr(avi_t *AVI);
void AVI_set_comment_fd(avi_t *AVI, int fd);
int AVI_get_comment_fd(avi_t *AVI);
struct riff_struct
{
u8 id[4]; /* RIFF */
u32 len;
u8 wave_id[4]; /* WAVE */
};
struct chunk_struct
{
u8 id[4];
u32 len;
};
struct common_struct
{
u16 wFormatTag;
u16 wChannels;
u32 dwSamplesPerSec;
u32 dwAvgBytesPerSec;
u16 wBlockAlign;
u16 wBitsPerSample; /* Only for PCM */
};
struct wave_header
{
struct riff_struct riff;
struct chunk_struct format;
struct common_struct common;
struct chunk_struct data;
};
// Simple WAV IO
int AVI_read_wave_header( int fd, struct wave_header * wave );
int AVI_write_wave_header( int fd, const struct wave_header * wave );
size_t AVI_read_wave_pcm_data( int fd, void * buffer, size_t buflen );
size_t AVI_write_wave_pcm_data( int fd, const void * buffer, size_t buflen );
struct AVIStreamHeader {
long fccType;
long fccHandler;
long dwFlags;
long dwPriority;
long dwInitialFrames;
long dwScale;
long dwRate;
long dwStart;
long dwLength;
long dwSuggestedBufferSize;
long dwQuality;
long dwSampleSize;
};
#endif /*_GF_AVILIB_H_*/
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