[FFmpeg-devel,10/18] lavc/dv.h: move encoder/decoder-specific code to a new header

dv.h is also used by libavformat, so avoid exposing encoder/decoder code
to it.
---
 libavcodec/dv.c          |  8 ++++--
 libavcodec/dv.h          | 34 ----------------------
 libavcodec/dv_internal.h | 62 ++++++++++++++++++++++++++++++++++++++++
 libavcodec/dvdec.c       |  1 +
 libavcodec/dvenc.c       |  1 +
 5 files changed, 70 insertions(+), 36 deletions(-)
 create mode 100644 libavcodec/dv_internal.h

Anton Khirnov:
> dv.h is also used by libavformat, so avoid exposing encoder/decoder code
> to it.
> ---
>  libavcodec/dv.c          |  8 ++++--
>  libavcodec/dv.h          | 34 ----------------------
>  libavcodec/dv_internal.h | 62 ++++++++++++++++++++++++++++++++++++++++
>  libavcodec/dvdec.c       |  1 +
>  libavcodec/dvenc.c       |  1 +
>  5 files changed, 70 insertions(+), 36 deletions(-)
>  create mode 100644 libavcodec/dv_internal.h
> 
> diff --git a/libavcodec/dv.c b/libavcodec/dv.c
> index b5e54de5dd..eb49978ad8 100644
> --- a/libavcodec/dv.c
> +++ b/libavcodec/dv.c
> @@ -38,8 +38,12 @@
>   * DV codec.
>   */
>  
> -#include "avcodec.h"
> -#include "dv.h"
> +#include <stdint.h>
> +
> +#include "libavutil/pixfmt.h"
> +
> +#include "dv_internal.h"
> +#include "dv_profile.h"
>  
>  static inline void dv_calc_mb_coordinates(const AVDVProfile *d, int chan,
>                                            int seq, int slot, uint16_t *tbl)
> diff --git a/libavcodec/dv.h b/libavcodec/dv.h
> index 859a4e6545..535f01cf0b 100644
> --- a/libavcodec/dv.h
> +++ b/libavcodec/dv.h
> @@ -27,13 +27,6 @@
>  #ifndef AVCODEC_DV_H
>  #define AVCODEC_DV_H
>  
> -#include "dv_profile.h"
> -
> -typedef struct DVwork_chunk {
> -    uint16_t buf_offset;
> -    uint16_t mb_coordinates[5];
> -} DVwork_chunk;
> -
>  enum dv_section_type {
>      dv_sect_header  = 0x1f,
>      dv_sect_subcode = 0x3f,
> @@ -72,31 +65,4 @@ enum dv_pack_type {
>   */
>  #define DV_MAX_BPM 8
>  
> -int ff_dv_init_dynamic_tables(DVwork_chunk *work_chunks, const AVDVProfile *d);
> -
> -static inline int dv_work_pool_size(const AVDVProfile *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(const AVDVProfile *sys,
> -                                      const uint8_t *buf,
> -                                      const 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 (sys->height == 720 && !(buf[1] & 0x0C))
> -        /* shifting the Y coordinate down by 72/2 macro blocks */
> -        *mb_y -= (*mb_y > 17) ? 18 : -72;
> -}
> -
>  #endif /* AVCODEC_DV_H */
> diff --git a/libavcodec/dv_internal.h b/libavcodec/dv_internal.h
> new file mode 100644
> index 0000000000..4b4151c88d
> --- /dev/null
> +++ b/libavcodec/dv_internal.h
> @@ -0,0 +1,62 @@
> +/*
> + * DV encoder/decoder shared code
> + * Copyright (c) 2002 Fabrice Bellard
> + *
> + * This file is part of FFmpeg.
> + *
> + * 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.
> + *
> + * 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
> + * License along with FFmpeg; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
> + */
> +
> +#ifndef AVCODEC_DV_INTERNAL_H
> +#define AVCODEC_DV_INTERNAL_H
> +
> +#include <stdint.h>
> +
> +#include "dv.h"
> +#include "dv_profile.h"
> +
> +typedef struct DVwork_chunk {
> +    uint16_t buf_offset;
> +    uint16_t mb_coordinates[5];
> +} DVwork_chunk;
> +
> +int ff_dv_init_dynamic_tables(DVwork_chunk *work_chunks, const AVDVProfile *d);
> +
> +static inline int dv_work_pool_size(const AVDVProfile *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(const AVDVProfile *sys,
> +                                      const uint8_t *buf,
> +                                      const 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 (sys->height == 720 && !(buf[1] & 0x0C))
> +        /* shifting the Y coordinate down by 72/2 macro blocks */
> +        *mb_y -= (*mb_y > 17) ? 18 : -72;
> +}
> +
> +#endif // AVCODEC_DV_INTERNAL_H
> diff --git a/libavcodec/dvdec.c b/libavcodec/dvdec.c
> index 444b137488..297bf7f2fb 100644
> --- a/libavcodec/dvdec.c
> +++ b/libavcodec/dvdec.c
> @@ -45,6 +45,7 @@
>  #include "avcodec.h"
>  #include "codec_internal.h"
>  #include "dv.h"
> +#include "dv_internal.h"
>  #include "dv_profile_internal.h"
>  #include "dvdata.h"
>  #include "get_bits.h"
> diff --git a/libavcodec/dvenc.c b/libavcodec/dvenc.c
> index 19291724e0..1f0374b865 100644
> --- a/libavcodec/dvenc.c
> +++ b/libavcodec/dvenc.c
> @@ -38,6 +38,7 @@
>  #include "avcodec.h"
>  #include "codec_internal.h"
>  #include "dv.h"
> +#include "dv_internal.h"
>  #include "dv_profile_internal.h"
>  #include "dv_tablegen.h"
>  #include "encode.h"

LGTM (I pondered doing something like this, but couldn't come up with a
good name for the header. I was fixated on "dv_codecs.h" given that this
would be the common code for the codecs, but that sounded strange.)

- Andreas