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/* mpegencode.c */
/* Start codes. */
#define SEQ_END_CODE 0x000001b7
#define SEQ_START_CODE 0x000001b3
#define GOP_START_CODE 0x000001b8
#define PICTURE_START_CODE 0x00000100
#define SLICE_MIN_START_CODE 0x00000101
#define SLICE_MAX_START_CODE 0x000001af
#define EXT_START_CODE 0x000001b5
#define USER_START_CODE 0x000001b2
/* Macros for picture code type. */
#define I_TYPE 1
#define P_TYPE 2
#define B_TYPE 3
typedef int DCTELEM;
enum OutputFormat {
FMT_MPEG1,
FMT_H263,
FMT_MJPEG,
};
#define MAX_NEG_CROP 384
#define MPEG_BUF_SIZE (16 * 1024)
typedef struct MpegEncContext {
/* the following parameters must be initialized before encoding */
int width, height; /* picture size. must be a multiple of 16 */
int gop_size;
int frame_rate; /* number of frames per second */
int intra_only; /* if true, only intra pictures are generated */
int bit_rate; /* wanted bit rate */
enum OutputFormat out_format; /* output format */
int h263_rv10; /* use RV10 variation for H263 */
/* the following fields are managed internally by the encoder */
/* bit output */
PutBitContext pb;
/* sequence parameters */
int picture_number;
int fake_picture_number; /* picture number at the bitstream frame rate */
int gop_picture_number; /* index of the first picture of a GOP */
int mb_width, mb_height;
UINT8 *new_picture[3]; /* picture to be compressed */
UINT8 *last_picture[3]; /* previous picture */
UINT8 *current_picture[3]; /* buffer to store the decompressed current picture */
int last_dc[3];
int qscale;
int pict_type;
int frame_rate_index;
/* macroblock layer */
int mb_incr;
int mb_intra;
/* matrix transmitted in the bitstream */
UINT8 init_intra_matrix[64];
/* precomputed matrix (combine qscale and DCT renorm) */
int intra_matrix[64];
int non_intra_matrix[64];
int block_last_index[6]; /* last non zero coefficient in block */
void *opaque; /* private data for the user */
/* bit rate control */
int I_frame_bits; /* wanted number of bits per I frame */
int P_frame_bits; /* same for P frame */
long long wanted_bits;
long long total_bits;
struct MJpegContext *mjpeg_ctx;
} MpegEncContext;
extern const UINT8 zigzag_direct[64];
/* h263enc.c */
void h263_encode_mb(MpegEncContext *s,
DCTELEM block[6][64],
int motion_x, int motion_y);
void h263_picture_header(MpegEncContext *s, int picture_number);
void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
/* mjpegenc.c */
int mjpeg_init(MpegEncContext *s);
void mjpeg_close(MpegEncContext *s);
void mjpeg_encode_mb(MpegEncContext *s,
DCTELEM block[6][64]);
void mjpeg_picture_header(MpegEncContext *s);
void mjpeg_picture_trailer(MpegEncContext *s);
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