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mpeg4videodec: add a mpeg4-specific private context.

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This commit is contained in:
Anton Khirnov 2013-11-26 10:41:57 +01:00
parent 95fd52c11b
commit 35e0833d41
3 changed files with 26 additions and 6 deletions
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4
libavcodec/mpeg4video.h
View File

@ -59,6 +59,10 @@
#define VISUAL_OBJ_STARTCODE 0x1B5
#define VOP_STARTCODE 0x1B6
typedef struct Mpeg4DecContext {
MpegEncContext m;
} Mpeg4DecContext;
/* dc encoding for mpeg4 */
extern const uint8_t ff_mpeg4_DCtab_lum[13][2];
extern const uint8_t ff_mpeg4_DCtab_chrom[13][2];

7
libavcodec/mpeg4video_parser.c
View File

@ -28,7 +28,7 @@
struct Mp4vParseContext {
ParseContext pc;
struct MpegEncContext enc;
Mpeg4DecContext dec_ctx;
int first_picture;
};
@ -76,7 +76,8 @@ static int av_mpeg4_decode_header(AVCodecParserContext *s1,
const uint8_t *buf, int buf_size)
{
struct Mp4vParseContext *pc = s1->priv_data;
MpegEncContext *s = &pc->enc;
Mpeg4DecContext *dec_ctx = &pc->dec_ctx;
MpegEncContext *s = &dec_ctx->m;
GetBitContext gb1, *gb = &gb1;
int ret;
@ -106,7 +107,7 @@ static av_cold int mpeg4video_parse_init(AVCodecParserContext *s)
struct Mp4vParseContext *pc = s->priv_data;
pc->first_picture = 1;
pc->enc.slice_context_count = 1;
pc->dec_ctx.m.slice_context_count = 1;
return 0;
}

21
libavcodec/mpeg4videodec.c
View File

@ -2397,9 +2397,24 @@ end:
return decode_vop_header(s, gb);
}
static int mpeg4_update_thread_context(AVCodecContext *dst,
const AVCodecContext *src)
{
Mpeg4DecContext *s = dst->priv_data;
const Mpeg4DecContext *s1 = src->priv_data;
int ret = ff_mpeg_update_thread_context(dst, src);
if (ret < 0)
return ret;
return 0;
}
static av_cold int decode_init(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
Mpeg4DecContext *ctx = avctx->priv_data;
MpegEncContext *s = &ctx->m;
int ret;
static int done = 0;
@ -2469,7 +2484,7 @@ AVCodec ff_mpeg4_decoder = {
.long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_MPEG4,
.priv_data_size = sizeof(MpegEncContext),
.priv_data_size = sizeof(Mpeg4DecContext),
.init = decode_init,
.close = ff_h263_decode_end,
.decode = ff_h263_decode_frame,
@ -2479,5 +2494,5 @@ AVCodec ff_mpeg4_decoder = {
.flush = ff_mpeg_flush,
.pix_fmts = ff_h263_hwaccel_pixfmt_list_420,
.profiles = NULL_IF_CONFIG_SMALL(mpeg4_video_profiles),
.update_thread_context = ONLY_IF_THREADS_ENABLED(ff_mpeg_update_thread_context),
.update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg4_update_thread_context),
};