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Code Issues Releases Activity

avcodec/mpegvideo: Move bit_rate field to MSMP4DecContext

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Also make it an int as that is all MSMP4 needs.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2025-03-15 07:59:47 +01:00
parent f733cfca28
commit 6d47d569d7
4 changed files with 19 additions and 12 deletions
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1
libavcodec/mpegvideo.h
View File

@ -95,7 +95,6 @@ typedef struct MpegEncContext {
void *private_ctx;
/* the following parameters must be initialized before encoding */
int width, height;///< picture size. must be a multiple of 16
int64_t bit_rate; ///< wanted bit rate
enum OutputFormat out_format; ///< output format
int h263_pred; ///< use MPEG-4/H.263 ac/dc predictions
int pb_frame; ///< PB-frame mode (0 = none, 1 = base, 2 = improved)

21
libavcodec/msmpeg4dec.c
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@ -389,6 +389,7 @@ av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx)
int ff_msmpeg4_decode_picture_header(MpegEncContext * s)
{
MSMP4DecContext *const ms = mpv_to_msmpeg4(s);
int code;
// at minimum one bit per macroblock is required at least in a valid frame,
@ -457,8 +458,10 @@ int ff_msmpeg4_decode_picture_header(MpegEncContext * s)
case MSMP4_WMV1:
ff_msmpeg4_decode_ext_header(s, (2+5+5+17+7)/8);
if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb);
else s->per_mb_rl_table= 0;
if (ms->bit_rate > MBAC_BITRATE)
s->per_mb_rl_table = get_bits1(&s->gb);
else
s->per_mb_rl_table = 0;
if(!s->per_mb_rl_table){
s->rl_chroma_table_index = decode012(&s->gb);
@ -503,8 +506,10 @@ int ff_msmpeg4_decode_picture_header(MpegEncContext * s)
case MSMP4_WMV1:
s->use_skip_mb_code = get_bits1(&s->gb);
if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb);
else s->per_mb_rl_table= 0;
if (ms->bit_rate > MBAC_BITRATE)
s->per_mb_rl_table = get_bits1(&s->gb);
else
s->per_mb_rl_table = 0;
if(!s->per_mb_rl_table){
s->rl_table_index = decode012(&s->gb);
@ -514,7 +519,8 @@ int ff_msmpeg4_decode_picture_header(MpegEncContext * s)
s->dc_table_index = get_bits1(&s->gb);
s->mv_table_index = get_bits1(&s->gb);
s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
s->inter_intra_pred = s->width*s->height < 320*240 &&
ms->bit_rate <= II_BITRATE;
break;
}
@ -534,7 +540,7 @@ int ff_msmpeg4_decode_picture_header(MpegEncContext * s)
s->no_rounding = 0;
}
}
ff_dlog(s->avctx, "%d %"PRId64" %d %d %d\n", s->pict_type, s->bit_rate,
ff_dlog(s->avctx, "%d %d %d %d %d\n", s->pict_type, ms->bit_rate,
s->inter_intra_pred, s->width, s->height);
s->esc3_level_length= 0;
@ -545,13 +551,14 @@ int ff_msmpeg4_decode_picture_header(MpegEncContext * s)
int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size)
{
MSMP4DecContext *const ms = mpv_to_msmpeg4(s);
int left= buf_size*8 - get_bits_count(&s->gb);
int length = s->msmpeg4_version >= MSMP4_V3 ? 17 : 16;
/* the alt_bitstream reader could read over the end so we need to check it */
if(left>=length && left<length+8)
{
skip_bits(&s->gb, 5); /* fps */
s->bit_rate= get_bits(&s->gb, 11)*1024;
ms->bit_rate = get_bits(&s->gb, 11) * 1024;
if (s->msmpeg4_version >= MSMP4_V3)
s->flipflop_rounding= get_bits1(&s->gb);
else

1
libavcodec/msmpeg4dec.h
View File

@ -30,6 +30,7 @@
typedef struct MSMP4DecContext {
MpegEncContext m;
int bit_rate;
} MSMP4DecContext;
static inline MSMP4DecContext *mpv_to_msmpeg4(MpegEncContext *s)

8
libavcodec/wmv2dec.c
View File

@ -177,7 +177,7 @@ static int decode_ext_header(WMV2DecContext *w)
init_get_bits(&gb, s->avctx->extradata, 32);
fps = get_bits(&gb, 5);
s->bit_rate = get_bits(&gb, 11) * 1024;
w->ms.bit_rate = get_bits(&gb, 11) * 1024;
w->mspel_bit = get_bits1(&gb);
s->loop_filter = get_bits1(&gb);
w->abt_flag = get_bits1(&gb);
@ -193,10 +193,10 @@ static int decode_ext_header(WMV2DecContext *w)
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_DEBUG,
"fps:%d, br:%"PRId64", qpbit:%d, abt_flag:%d, j_type_bit:%d, "
"fps:%d, br:%d, qpbit:%d, abt_flag:%d, j_type_bit:%d, "
"tl_mv_flag:%d, mbrl_bit:%d, code:%d, loop_filter:%d, "
"slices:%d\n",
fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit,
fps, w->ms.bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit,
w->top_left_mv_flag, w->per_mb_rl_bit, code, s->loop_filter,
code);
return 0;
@ -313,7 +313,7 @@ int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s)
s->dc_table_index = get_bits1(&s->gb);
s->mv_table_index = get_bits1(&s->gb);
s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE);
s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && w->ms.bit_rate <= II_BITRATE);
s->no_rounding ^= 1;
if (s->avctx->debug & FF_DEBUG_PICT_INFO) {