--- /dev/null
- * This file is part of Libav.
+ /*
+ * Constants for DV codec
+ * Copyright (c) 2002 Fabrice Bellard
+ *
- * Libav is free software; you can redistribute it and/or
++ * This file is part of FFmpeg.
+ *
- * Libav is distributed in the hope that it will be useful,
++ * FFmpeg 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.
+ *
- * License along with Libav; if not, write to the Free Software
++ * FFmpeg 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
-/* minimum number of bytes to read from a DV stream in order to
- determine the profile */
-#define DV_PROFILE_BYTES (6*80) /* 6 DIF blocks */
++ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+ /**
+ * @file
+ * Constants for DV codec.
+ */
+
+ #ifndef AVCODEC_DV_H
+ #define AVCODEC_DV_H
+
+ #include "avcodec.h"
+ #include "dsputil.h"
+ #include "get_bits.h"
+ #include "dv_profile.h"
+
+ typedef struct DVVideoContext {
+ const DVprofile *sys;
+ AVFrame picture;
+ AVCodecContext *avctx;
+ uint8_t *buf;
+
+ uint8_t dv_zigzag[2][64];
+
+ void (*get_pixels)(int16_t *block, const uint8_t *pixels, int line_size);
+ void (*fdct[2])(int16_t *block);
+ void (*idct_put[2])(uint8_t *dest, int line_size, int16_t *block);
+ me_cmp_func ildct_cmp;
+ } DVVideoContext;
+
+ enum dv_section_type {
+ dv_sect_header = 0x1f,
+ dv_sect_subcode = 0x3f,
+ dv_sect_vaux = 0x56,
+ dv_sect_audio = 0x76,
+ dv_sect_video = 0x96,
+ };
+
+ enum dv_pack_type {
+ dv_header525 = 0x3f, /* see dv_write_pack for important details on */
+ dv_header625 = 0xbf, /* these two packs */
+ dv_timecode = 0x13,
+ dv_audio_source = 0x50,
+ dv_audio_control = 0x51,
+ dv_audio_recdate = 0x52,
+ dv_audio_rectime = 0x53,
+ dv_video_source = 0x60,
+ dv_video_control = 0x61,
+ dv_video_recdate = 0x62,
+ dv_video_rectime = 0x63,
+ dv_unknown_pack = 0xff,
+ };
+
+ #define DV_PROFILE_IS_HD(p) ((p)->video_stype & 0x10)
+ #define DV_PROFILE_IS_1080i50(p) (((p)->video_stype == 0x14) && ((p)->dsf == 1))
+ #define DV_PROFILE_IS_720p50(p) (((p)->video_stype == 0x18) && ((p)->dsf == 1))
+
+
+ /**
+ * largest possible DV frame, in bytes (1080i50)
+ */
+ #define DV_MAX_FRAME_SIZE 576000
+
+ /**
+ * maximum number of blocks per macroblock in any DV format
+ */
+ #define DV_MAX_BPM 8
+
+ #define TEX_VLC_BITS 9
+
+ extern RL_VLC_ELEM ff_dv_rl_vlc[1184];
+
+ 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_DV_H */