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opus_rc: add macros for checkpoint rollback

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Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
This commit is contained in:
Rostislav Pehlivanov 2017-04-02 20:55:30 +01:00
parent 6d0b62a12b
commit a66121d964
1 changed files with 14 additions and 0 deletions
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14
libavcodec/opus_rc.h
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@ -109,4 +109,18 @@ void ff_opus_rc_dec_raw_init(OpusRangeCoder *rc, const uint8_t *rightend, ui
void ff_opus_rc_enc_end(OpusRangeCoder *rc, uint8_t *dst, int size);
void ff_opus_rc_enc_init(OpusRangeCoder *rc);
#define OPUS_RC_CHECKPOINT_UPDATE(rc) \
rc_rollback_bits = opus_rc_tell_frac(rc); \
rc_rollback_ctx = *rc
#define OPUS_RC_CHECKPOINT_SPAWN(rc) \
uint32_t rc_rollback_bits = opus_rc_tell_frac(rc); \
OpusRangeCoder rc_rollback_ctx = *rc \
#define OPUS_RC_CHECKPOINT_BITS(rc) \
(opus_rc_tell_frac(rc) - rc_rollback_bits)
#define OPUS_RC_CHECKPOINT_ROLLBACK(rc) \
memcpy(rc, &rc_rollback_ctx, sizeof(OpusRangeCoder)); \
#endif /* AVCODEC_OPUS_RC_H */