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dv: Split off DV video decoder into its own file.

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This commit is contained in:
Diego Biurrun
2012-03-18 19:01:45 +01:00
parent 9f43fdda3e
commit d724fe665b
5 changed files with 442 additions and 397 deletions
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libavcodec/dvdata.h
+44
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@@ -29,6 +29,8 @@
#include "libavutil/rational.h"
#include "avcodec.h"
#include "dsputil.h"
#include "get_bits.h"
typedef struct DVwork_chunk {
uint16_t buf_offset;
@@ -65,6 +67,20 @@ typedef struct DVprofile {
const uint8_t (*audio_shuffle)[9]; /* PCM shuffling table */
} DVprofile;
typedef struct DVVideoContext {
const DVprofile *sys;
AVFrame picture;
AVCodecContext *avctx;
uint8_t *buf;
uint8_t dv_zigzag[2][64];
void (*get_pixels)(DCTELEM *block, const uint8_t *pixels, int line_size);
void (*fdct[2])(DCTELEM *block);
void (*idct_put[2])(uint8_t *dest, int line_size, DCTELEM *block);
me_cmp_func ildct_cmp;
} DVVideoContext;
enum dv_section_type {
dv_sect_header = 0x1f,
dv_sect_subcode = 0x3f,
@@ -106,8 +122,36 @@ enum dv_pack_type {
*/
#define DV_MAX_BPM 8
#define TEX_VLC_BITS 9
extern RL_VLC_ELEM ff_dv_rl_vlc[1184];
const DVprofile* avpriv_dv_frame_profile(const DVprofile *sys,
const uint8_t* frame, unsigned buf_size);
const DVprofile* avpriv_dv_codec_profile(AVCodecContext* codec);
int ff_dv_init_dynamic_tables(const DVprofile *d);
int ff_dvvideo_init(AVCodecContext *avctx);
static inline int dv_work_pool_size(const DVprofile *d)
{
int size = d->n_difchan*d->difseg_size*27;
if (DV_PROFILE_IS_1080i50(d))
size -= 3*27;
if (DV_PROFILE_IS_720p50(d))
size -= 4*27;
return size;
}
static inline void dv_calculate_mb_xy(DVVideoContext *s, DVwork_chunk *work_chunk, int m, int *mb_x, int *mb_y)
{
*mb_x = work_chunk->mb_coordinates[m] & 0xff;
*mb_y = work_chunk->mb_coordinates[m] >> 8;
/* We work with 720p frames split in half. The odd half-frame (chan==2,3) is displaced :-( */
if (s->sys->height == 720 && !(s->buf[1]&0x0C)) {
*mb_y -= (*mb_y>17)?18:-72; /* shifting the Y coordinate down by 72/2 macro blocks */
}
}
#endif /* AVCODEC_DVDATA_H */