hvirtual/libmpeg3/libmpeg3.h

   1 #ifndef LIBMPEG3_H
   2 #define LIBMPEG3_H
   3
   4 #ifdef __cplusplus
   5 extern "C" {
   6 #endif
   7
   8 #include "mpeg3private.h"
   9
  10
  11 /* Supported color models for mpeg3_read_frame */
  12 #define MPEG3_RGB565 2
  13 #define MPEG3_BGR888 0
  14 #define MPEG3_BGRA8888 1
  15 #define MPEG3_RGB888 3
  16 #define MPEG3_RGBA8888 4
  17 #define MPEG3_RGBA16161616 5
  18
  19 /* Color models for the 601 to RGB conversion */
  20 /* 601 not implemented for scalar code */
  21 #define MPEG3_601_RGB565 11
  22 #define MPEG3_601_BGR888 7
  23 #define MPEG3_601_BGRA8888 8
  24 #define MPEG3_601_RGB888 9
  25 #define MPEG3_601_RGBA8888 10
  26
  27 /* Supported color models for mpeg3_read_yuvframe */
  28 #define MPEG3_YUV420P 12
  29 #define MPEG3_YUV422P 13
  30
  31
  32
  33
  34 /* Get version information */
  35 int mpeg3_major();
  36 int mpeg3_minor();
  37 int mpeg3_release();
  38
  39
  40 /* Check for file compatibility.  Return 1 if compatible. */
  41 int mpeg3_check_sig(char *path);
  42
  43 /* Open the MPEG3 stream. */
  44 mpeg3_t* mpeg3_open(char *path);
  45
  46 /* Open the MPEG3 stream and copy the tables from an already open stream. */
  47 /* Eliminates the initial timecode search. */
  48 mpeg3_t* mpeg3_open_copy(char *path, mpeg3_t *old_file);
  49 int mpeg3_close(mpeg3_t *file);
  50
  51
  52
  53
  54 /* Performance */
  55 int mpeg3_set_cpus(mpeg3_t *file, int cpus);
  56 int mpeg3_set_mmx(mpeg3_t *file, int use_mmx);
  57
  58 /* Query the MPEG3 stream about audio. */
  59 int mpeg3_has_audio(mpeg3_t *file);
  60 int mpeg3_total_astreams(mpeg3_t *file);             /* Number of multiplexed audio streams */
  61 int mpeg3_audio_channels(mpeg3_t *file, int stream);
  62 int mpeg3_sample_rate(mpeg3_t *file, int stream);
  63 char* mpeg3_audio_format(mpeg3_t *file, int stream);
  64
  65 /* Total length obtained from the timecode. */
  66 /* For DVD files, this is unreliable. */
  67 long mpeg3_audio_samples(mpeg3_t *file, int stream);
  68 int mpeg3_set_sample(mpeg3_t *file, long sample, int stream);    /* Seek to a sample */
  69 long mpeg3_get_sample(mpeg3_t *file, int stream);    /* Tell current position */
  70
  71 /* Read a PCM buffer of audio from 1 channel and advance the position. */
  72 /* Return a 1 if error. */
  73 /* Stream defines the number of the multiplexed stream to read. */
  74 /* If both output arguments are null the audio is not rendered. */
  75 int mpeg3_read_audio(mpeg3_t *file,
  76                 float *output_f,      /* Pointer to pre-allocated buffer of floats */
  77                 short *output_i,      /* Pointer to pre-allocated buffer of int16's */
  78                 int channel,          /* Channel to decode */
  79                 long samples,         /* Number of samples to decode */
  80                 int stream);          /* Stream containing the channel */
  81
  82 /* Reread the last PCM buffer from a different channel and advance the position */
  83 int mpeg3_reread_audio(mpeg3_t *file,
  84                 float *output_f,      /* Pointer to pre-allocated buffer of floats */
  85                 short *output_i,      /* Pointer to pre-allocated buffer of int16's */
  86                 int channel,          /* Channel to decode */
  87                 long samples,         /* Number of samples to decode */
  88                 int stream);          /* Stream containing the channel */
  89
  90 /* Read the next compressed audio chunk.  Store the size in size and return a  */
  91 /* 1 if error. */
  92 /* Stream defines the number of the multiplexed stream to read. */
  93 int mpeg3_read_audio_chunk(mpeg3_t *file,
  94                 unsigned char *output,
  95                 long *size,
  96                 long max_size,
  97                 int stream);
  98
  99 /* Query the stream about video. */
 100 int mpeg3_has_video(mpeg3_t *file);
 101 int mpeg3_total_vstreams(mpeg3_t *file);            /* Number of multiplexed video streams */
 102 int mpeg3_video_width(mpeg3_t *file, int stream);
 103 int mpeg3_video_height(mpeg3_t *file, int stream);
 104 float mpeg3_aspect_ratio(mpeg3_t *file, int stream); /* aspect ratio.  0 if none */
 105 double mpeg3_frame_rate(mpeg3_t *file, int stream);  /* Frames/sec */
 106
 107 /* Total length.   */
 108 /* For DVD files, this is 1 indicating only percentage seeking is available. */
 109 long mpeg3_video_frames(mpeg3_t *file, int stream);
 110 int mpeg3_set_frame(mpeg3_t *file, long frame, int stream); /* Seek to a frame */
 111 int mpeg3_skip_frames();
 112 long mpeg3_get_frame(mpeg3_t *file, int stream);            /* Tell current position */
 113
 114 /* Seek all the tracks based on a percentage of the total bytes in the  */
 115 /* file or the total */
 116 /* time in a toc if one exists.  Percentage is a 0 to 1 double. */
 117 /* This eliminates the need for tocs and 64 bit longs but doesn't  */
 118 /* give frame accuracy. */
 119 int mpeg3_seek_percentage(mpeg3_t *file, double percentage);
 120 double mpeg3_tell_percentage(mpeg3_t *file);
 121
 122 /* To synchronize audio and video in percentage seeking mode, these must */
 123 /* be called after percentage seeking the video file and before */
 124 /* percentage seeking the audio file.  Then when the audio file is percentage */
 125 /* seeked it will search for the nearest pts to file->percentage_pts. */
 126 double mpeg3_get_percentage_pts(mpeg3_t *file);
 127 void mpeg3_set_percentage_pts(mpeg3_t *file, double pts);
 128
 129 int mpeg3_previous_frame(mpeg3_t *file, int stream);
 130 int mpeg3_end_of_audio(mpeg3_t *file, int stream);
 131 int mpeg3_end_of_video(mpeg3_t *file, int stream);
 132
 133 /* Give the seconds time in the last packet read */
 134 double mpeg3_get_time(mpeg3_t *file);
 135
 136 /* Read a frame.  The dimensions of the input area and output frame must be supplied. */
 137 /* The frame is taken from the input area and scaled to fit the output frame in 1 step. */
 138 /* Stream defines the number of the multiplexed stream to read. */
 139 /* The last row of **output_rows must contain 4 extra bytes for scratch work. */
 140 int mpeg3_read_frame(mpeg3_t *file,
 141                 unsigned char **output_rows, /* Array of pointers to the start of each output row */
 142                 int in_x,                    /* Location in input frame to take picture */
 143                 int in_y,
 144                 int in_w,
 145                 int in_h,
 146                 int out_w,                   /* Dimensions of output_rows */
 147                 int out_h,
 148                 int color_model,             /* One of the color model #defines */
 149                 int stream);
 150
 151 /* Get the colormodel being used natively by the stream */
 152 int mpeg3_colormodel(mpeg3_t *file, int stream);
 153 /* Set the row stride to be used in mpeg3_read_yuvframe */
 154 int mpeg3_set_rowspan(mpeg3_t *file, int bytes, int stream);
 155
 156 /* Read a frame in the native color model used by the stream.  */
 157 /* The Y, U, and V planes are copied into the y, u, and v */
 158 /* buffers provided. */
 159 /* The input is cropped to the dimensions given but not scaled. */
 160 int mpeg3_read_yuvframe(mpeg3_t *file,
 161                 char *y_output,
 162                 char *u_output,
 163                 char *v_output,
 164                 int in_x,
 165                 int in_y,
 166                 int in_w,
 167                 int in_h,
 168                 int stream);
 169
 170 /* Read a frame in the native color model used by the stream.  */
 171 /* The Y, U, and V planes are not copied but the _output pointers */
 172 /* are redirected to the frame buffer. */
 173 int mpeg3_read_yuvframe_ptr(mpeg3_t *file,
 174                 char **y_output,
 175                 char **u_output,
 176                 char **v_output,
 177                 int stream);
 178
 179 /* Drop frames number of frames */
 180 int mpeg3_drop_frames(mpeg3_t *file, long frames, int stream);
 181
 182 /* Read the next compressed frame including headers. */
 183 /* Store the size in size and return a 1 if error. */
 184 /* Stream defines the number of the multiplexed stream to read. */
 185 int mpeg3_read_video_chunk(mpeg3_t *file,
 186                 unsigned char *output,
 187                 long *size,
 188                 long max_size,
 189                 int stream);
 190
 191 /* Master control */
 192 int mpeg3_total_programs();
 193 int mpeg3_set_program(int program);
 194
 195 #ifdef __cplusplus
 196 }
 197 #endif
 198
 199 #endif