24 static MPP_RET update_curbyte_default(BitReadCtx_t *bitctx)  in update_curbyte_default()  argument
26     if (bitctx->bytes_left_ < 1)  in update_curbyte_default()
30     bitctx->curr_byte_ = *bitctx->data_++ & 0xff;  in update_curbyte_default()
31     --bitctx->bytes_left_;  in update_curbyte_default()
32     bitctx->num_remaining_bits_in_curr_byte_ = 8;  in update_curbyte_default()
33     bitctx->prev_two_bytes_ = (bitctx->prev_two_bytes_ << 8) | bitctx->curr_byte_;  in update_curbyte_default()
38 static MPP_RET update_curbyte_h264(BitReadCtx_t *bitctx)  in update_curbyte_h264()  argument
40     if (bitctx->bytes_left_ < 1)  in update_curbyte_h264()
45     if ((*bitctx->data_ == 0x03)  in update_curbyte_h264()
46         && ((bitctx->prev_two_bytes_ & 0xffff) == 0)) {  in update_curbyte_h264()
48         ++bitctx->data_;  in update_curbyte_h264()
49         --bitctx->bytes_left_;  in update_curbyte_h264()
50         ++bitctx->emulation_prevention_bytes_;  in update_curbyte_h264()
51         bitctx->used_bits += 8;  in update_curbyte_h264()
53         bitctx->prev_two_bytes_ = 0xffff;  in update_curbyte_h264()
54         if (bitctx->bytes_left_ < 1)  in update_curbyte_h264()
58     bitctx->curr_byte_ = *bitctx->data_++ & 0xff;  in update_curbyte_h264()
59     --bitctx->bytes_left_;  in update_curbyte_h264()
60     bitctx->num_remaining_bits_in_curr_byte_ = 8;  in update_curbyte_h264()
61     bitctx->prev_two_bytes_ = (bitctx->prev_two_bytes_ << 8) | bitctx->curr_byte_;  in update_curbyte_h264()
66 static MPP_RET update_curbyte_h2645_sei(BitReadCtx_t *bitctx)  in update_curbyte_h2645_sei()  argument
68     if (bitctx->bytes_left_ < 1)  in update_curbyte_h2645_sei()
73     if ((*bitctx->data_ == 0x03)  in update_curbyte_h2645_sei()
74         && ((bitctx->prev_two_bytes_ & 0xffff) == 0)) {  in update_curbyte_h2645_sei()
76         ++bitctx->data_;  in update_curbyte_h2645_sei()
78         bitctx->prev_two_bytes_ = 0xffff;  in update_curbyte_h2645_sei()
81     bitctx->curr_byte_ = *bitctx->data_++ & 0xff;  in update_curbyte_h2645_sei()
82     --bitctx->bytes_left_;  in update_curbyte_h2645_sei()
83     bitctx->num_remaining_bits_in_curr_byte_ = 8;  in update_curbyte_h2645_sei()
84     bitctx->prev_two_bytes_ = (bitctx->prev_two_bytes_ << 8) | bitctx->curr_byte_;  in update_curbyte_h2645_sei()
89 static MPP_RET update_curbyte_avs2(BitReadCtx_t *bitctx)  in update_curbyte_avs2()  argument
91     if (bitctx->bytes_left_ < 1)  in update_curbyte_avs2()
94     if (*bitctx->data_ == 0x02 && ((bitctx->prev_two_bytes_ & 0xffff) == 0)) {  in update_curbyte_avs2()
96         bitctx->curr_byte_ = 0;  in update_curbyte_avs2()
97         bitctx->num_remaining_bits_in_curr_byte_ = 6;  in update_curbyte_avs2()
98         ++bitctx->data_;  in update_curbyte_avs2()
100         bitctx->curr_byte_ = *bitctx->data_++ & 0xff;  in update_curbyte_avs2()
101         bitctx->num_remaining_bits_in_curr_byte_ = 8;  in update_curbyte_avs2()
104     bitctx->prev_two_bytes_ = (bitctx->prev_two_bytes_ << 8) | bitctx->curr_byte_;  in update_curbyte_avs2()
105     --bitctx->bytes_left_;  in update_curbyte_avs2()
118 MPP_RET mpp_read_bits(BitReadCtx_t *bitctx, RK_S32 num_bits, RK_S32 *out)  in mpp_read_bits()  argument
125     while (bitctx->num_remaining_bits_in_curr_byte_ < bits_left) {  in mpp_read_bits()
127         *out |= (bitctx->curr_byte_ << (bits_left - bitctx->num_remaining_bits_in_curr_byte_));  in mpp_read_bits()
128         bits_left -= bitctx->num_remaining_bits_in_curr_byte_;  in mpp_read_bits()
129         if (bitctx->update_curbyte(bitctx)) {  in mpp_read_bits()
133     *out |= (bitctx->curr_byte_ >> (bitctx->num_remaining_bits_in_curr_byte_ - bits_left));  in mpp_read_bits()
135     bitctx->num_remaining_bits_in_curr_byte_ -= bits_left;  in mpp_read_bits()
136     bitctx->used_bits += num_bits;  in mpp_read_bits()
146 MPP_RET mpp_read_longbits(BitReadCtx_t *bitctx, RK_S32 num_bits, RK_U32 *out)  in mpp_read_longbits()  argument
151         return mpp_read_bits(bitctx, num_bits, (RK_S32 *)out);  in mpp_read_longbits()
153     if (mpp_read_bits(bitctx, 16, &val)) {  in mpp_read_longbits()
156     if (mpp_read_bits(bitctx, (num_bits - 16), &val1)) {  in mpp_read_longbits()
170 MPP_RET mpp_skip_bits(BitReadCtx_t *bitctx, RK_S32 num_bits)  in mpp_skip_bits()  argument
174     while (bitctx->num_remaining_bits_in_curr_byte_ < bits_left) {  in mpp_skip_bits()
176         bits_left -= bitctx->num_remaining_bits_in_curr_byte_;  in mpp_skip_bits()
177         if (bitctx->update_curbyte(bitctx)) {  in mpp_skip_bits()
181     bitctx->num_remaining_bits_in_curr_byte_ -= bits_left;  in mpp_skip_bits()
182     bitctx->used_bits += num_bits;  in mpp_skip_bits()
192 MPP_RET mpp_skip_longbits(BitReadCtx_t *bitctx, RK_S32 num_bits)  in mpp_skip_longbits()  argument
195         return mpp_skip_bits(bitctx, num_bits);  in mpp_skip_longbits()
197     if (mpp_skip_bits(bitctx, 16)) {  in mpp_skip_longbits()
200     if (mpp_skip_bits(bitctx, (num_bits - 16))) {  in mpp_skip_longbits()
211 MPP_RET mpp_show_bits(BitReadCtx_t *bitctx, RK_S32 num_bits, RK_S32 *out)  in mpp_show_bits()  argument
214     BitReadCtx_t tmp_ctx = *bitctx;  in mpp_show_bits()
229 MPP_RET mpp_show_longbits(BitReadCtx_t *bitctx, RK_S32 num_bits, RK_U32 *out)  in mpp_show_longbits()  argument
232     BitReadCtx_t tmp_ctx = *bitctx;  in mpp_show_longbits()
244 MPP_RET mpp_read_ue(BitReadCtx_t *bitctx, RK_U32 *val)  in mpp_read_ue()  argument
251         if (mpp_read_bits(bitctx, 1, &bit)) {  in mpp_read_ue()
262         if (mpp_read_bits(bitctx, num_bits, &rest)) {  in mpp_read_ue()
276 MPP_RET mpp_read_se(BitReadCtx_t *bitctx, RK_S32 *val)  in mpp_read_se()  argument
280     if (mpp_read_ue(bitctx, &ue)) {  in mpp_read_se()
297 RK_U32 mpp_has_more_rbsp_data(BitReadCtx_t *bitctx)  in mpp_has_more_rbsp_data()  argument
300     while (bitctx->bytes_left_ &&  in mpp_has_more_rbsp_data()
301            bitctx->data_[bitctx->bytes_left_ - 1] == 0)  in mpp_has_more_rbsp_data()
302         bitctx->bytes_left_--;  in mpp_has_more_rbsp_data()
306     if (bitctx->num_remaining_bits_in_curr_byte_ == 0 && bitctx->update_curbyte(bitctx))  in mpp_has_more_rbsp_data()
309     if (bitctx->bytes_left_)  in mpp_has_more_rbsp_data()
314     if (bitctx->num_remaining_bits_in_curr_byte_)  in mpp_has_more_rbsp_data()
315         return (bitctx->curr_byte_ &  in mpp_has_more_rbsp_data()
316                 ((1 << (bitctx->num_remaining_bits_in_curr_byte_ - 1)) - 1)) != 0;  in mpp_has_more_rbsp_data()
326 void mpp_set_bitread_ctx(BitReadCtx_t *bitctx, RK_U8 *data, RK_S32 size)  in mpp_set_bitread_ctx()  argument
328     memset(bitctx, 0, sizeof(BitReadCtx_t));  in mpp_set_bitread_ctx()
329     bitctx->data_ = data;  in mpp_set_bitread_ctx()
330     bitctx->bytes_left_ = size;  in mpp_set_bitread_ctx()
331     bitctx->num_remaining_bits_in_curr_byte_ = 0;  in mpp_set_bitread_ctx()
333     bitctx->prev_two_bytes_ = 0xffff;  in mpp_set_bitread_ctx()
334     bitctx->emulation_prevention_bytes_ = 0;  in mpp_set_bitread_ctx()
336     bitctx->buf = data;  in mpp_set_bitread_ctx()
337     bitctx->buf_len = size;  in mpp_set_bitread_ctx()
338     bitctx->used_bits = 0;  in mpp_set_bitread_ctx()
339     mpp_set_bitread_pseudo_code_type(bitctx, PSEUDO_CODE_NONE);  in mpp_set_bitread_ctx()
342 void mpp_set_bitread_pseudo_code_type(BitReadCtx_t *bitctx, PseudoCodeType type)  in mpp_set_bitread_pseudo_code_type()  argument
344     bitctx->prevention_type = type;  in mpp_set_bitread_pseudo_code_type()
347         bitctx->update_curbyte = update_curbyte_h264;  in mpp_set_bitread_pseudo_code_type()
350         bitctx->update_curbyte = update_curbyte_h2645_sei;  in mpp_set_bitread_pseudo_code_type()
353         bitctx->update_curbyte = update_curbyte_avs2;  in mpp_set_bitread_pseudo_code_type()
356         bitctx->update_curbyte = update_curbyte_default;  in mpp_set_bitread_pseudo_code_type()
367 RK_U8 *mpp_align_get_bits(BitReadCtx_t *bitctx)  in mpp_align_get_bits()  argument
369     int n = bitctx->num_remaining_bits_in_curr_byte_;  in mpp_align_get_bits()
371         mpp_skip_bits(bitctx, n);  in mpp_align_get_bits()
372     return bitctx->data_;  in mpp_align_get_bits()
375 RK_S32 mpp_get_bits_left(BitReadCtx_t *bitctx)  in mpp_get_bits_left()  argument
377     return  bitctx->bytes_left_ * 8 + bitctx->num_remaining_bits_in_curr_byte_;  in mpp_get_bits_left()
380 RK_S32 mpp_get_bits_count(BitReadCtx_t *bitctx)  in mpp_get_bits_count()  argument
382     return bitctx->used_bits;  in mpp_get_bits_count()