/****************************************************************************** * * Copyright (C) 2015 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ***************************************************************************** * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore */ #include #include "iv_datatypedef.h" #include "iv.h" #include "ivd.h" #include "impeg2_macros.h" #include "impeg2_buf_mgr.h" #include "impeg2_disp_mgr.h" #include "impeg2_defs.h" #include "impeg2_inter_pred.h" #include "impeg2_idct.h" #include "impeg2_format_conv.h" #include "impeg2_mem_func.h" #include "impeg2_platform_macros.h" #include "ithread.h" #include "impeg2_job_queue.h" #include "impeg2d.h" #include "impeg2d_bitstream.h" #include "impeg2d_api.h" #include "impeg2d_structs.h" #include "impeg2_globals.h" #include "impeg2d_pic_proc.h" #include "impeg2d_deinterlace.h" /****************************************************************************** * Function Name : impeg2d_next_start_code * * Description : Peek for next_start_code from the stream_t. * * Arguments : * dec : Decoder Context * * Values Returned : None ******************************************************************************/ void impeg2d_next_start_code(dec_state_t *ps_dec) { stream_t *ps_stream; ps_stream = &ps_dec->s_bit_stream; impeg2d_bit_stream_flush_to_byte_boundary(ps_stream); while ((impeg2d_bit_stream_nxt(ps_stream,START_CODE_PREFIX_LEN) != START_CODE_PREFIX) && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)) { impeg2d_bit_stream_get(ps_stream,8); } return; } /****************************************************************************** * Function Name : impeg2d_next_code * * Description : Peek for next_start_code from the stream_t. * * Arguments : * dec : Decoder Context * * Values Returned : None ******************************************************************************/ void impeg2d_next_code(dec_state_t *ps_dec, UWORD32 u4_start_code_val) { stream_t *ps_stream; ps_stream = &ps_dec->s_bit_stream; impeg2d_bit_stream_flush_to_byte_boundary(ps_stream); while ((impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) != u4_start_code_val) && (ps_dec->s_bit_stream.u4_offset <= ps_dec->s_bit_stream.u4_max_offset)) { if (impeg2d_bit_stream_get(ps_stream,8) != 0) { /* Ignore stuffing bit errors. */ } } return; } /****************************************************************************** * Function Name : impeg2d_peek_next_start_code * * Description : Peek for next_start_code from the stream_t. * * Arguments : * dec : Decoder Context * * Values Returned : None ******************************************************************************/ void impeg2d_peek_next_start_code(dec_state_t *ps_dec) { stream_t *ps_stream; ps_stream = &ps_dec->s_bit_stream; impeg2d_bit_stream_flush_to_byte_boundary(ps_stream); while ((impeg2d_bit_stream_nxt(ps_stream,START_CODE_PREFIX_LEN) != START_CODE_PREFIX) && (ps_dec->s_bit_stream.u4_offset <= ps_dec->s_bit_stream.u4_max_offset)) { impeg2d_bit_stream_get(ps_stream,8); } return; } /****************************************************************************** * * Function Name : impeg2d_dec_seq_hdr * * Description : Decodes Sequence header information * * Arguments : * dec : Decoder Context * * Values Returned : None ******************************************************************************/ IMPEG2D_ERROR_CODES_T impeg2d_dec_seq_hdr(dec_state_t *ps_dec) { stream_t *ps_stream; ps_stream = &ps_dec->s_bit_stream; UWORD16 u2_height; UWORD16 u2_width; if (impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) != SEQUENCE_HEADER_CODE) { impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN); return IMPEG2D_FRM_HDR_START_CODE_NOT_FOUND; } impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN); u2_width = impeg2d_bit_stream_get(ps_stream,12); u2_height = impeg2d_bit_stream_get(ps_stream,12); if ((u2_width != ps_dec->u2_horizontal_size) || (u2_height != ps_dec->u2_vertical_size)) { if (0 == ps_dec->u2_header_done) { /* This is the first time we are reading the resolution */ ps_dec->u2_horizontal_size = u2_width; ps_dec->u2_vertical_size = u2_height; if (0 == ps_dec->u4_frm_buf_stride) { ps_dec->u4_frm_buf_stride = (UWORD32) (u2_width); } } else { if((u2_width > ps_dec->u2_create_max_width) || (u2_height > ps_dec->u2_create_max_height)) { IMPEG2D_ERROR_CODES_T e_error = IMPEG2D_UNSUPPORTED_DIMENSIONS; ps_dec->u2_reinit_max_height = u2_height; ps_dec->u2_reinit_max_width = u2_width; return e_error; } else { /* The resolution has changed */ return (IMPEG2D_ERROR_CODES_T)IVD_RES_CHANGED; } } } if((ps_dec->u2_horizontal_size > ps_dec->u2_create_max_width) || (ps_dec->u2_vertical_size > ps_dec->u2_create_max_height)) { IMPEG2D_ERROR_CODES_T e_error = IMPEG2D_UNSUPPORTED_DIMENSIONS; return SET_IVD_FATAL_ERROR(e_error); } /*------------------------------------------------------------------------*/ /* Flush the following as they are not being used */ /* aspect_ratio_info (4 bits) */ /*------------------------------------------------------------------------*/ ps_dec->u2_aspect_ratio_info = impeg2d_bit_stream_get(ps_stream,4); /*------------------------------------------------------------------------*/ /* Frame rate code(4 bits) */ /*------------------------------------------------------------------------*/ ps_dec->u2_frame_rate_code = impeg2d_bit_stream_get(ps_stream,4); /*------------------------------------------------------------------------*/ /* Flush the following as they are not being used */ /* bit_rate_value (18 bits) */ /*------------------------------------------------------------------------*/ impeg2d_bit_stream_flush(ps_stream,18); GET_MARKER_BIT(ps_dec,ps_stream); /*------------------------------------------------------------------------*/ /* Flush the following as they are not being used */ /* vbv_buffer_size_value(10 bits), constrained_parameter_flag (1 bit) */ /*------------------------------------------------------------------------*/ impeg2d_bit_stream_flush(ps_stream,11); /*------------------------------------------------------------------------*/ /* Quantization matrix for the intra blocks */ /*------------------------------------------------------------------------*/ if(impeg2d_bit_stream_get_bit(ps_stream) == 1) { UWORD16 i; for(i = 0; i < NUM_PELS_IN_BLOCK; i++) { ps_dec->au1_intra_quant_matrix[gau1_impeg2_inv_scan_zig_zag[i]] = (UWORD8)impeg2d_bit_stream_get(ps_stream,8); } } else { memcpy(ps_dec->au1_intra_quant_matrix,gau1_impeg2_intra_quant_matrix_default, NUM_PELS_IN_BLOCK); } /*------------------------------------------------------------------------*/ /* Quantization matrix for the inter blocks */ /*------------------------------------------------------------------------*/ if(impeg2d_bit_stream_get_bit(ps_stream) == 1) { UWORD16 i; for(i = 0; i < NUM_PELS_IN_BLOCK; i++) { ps_dec->au1_inter_quant_matrix[gau1_impeg2_inv_scan_zig_zag[i]] = (UWORD8)impeg2d_bit_stream_get(ps_stream,8); } } else { memcpy(ps_dec->au1_inter_quant_matrix,gau1_impeg2_inter_quant_matrix_default, NUM_PELS_IN_BLOCK); } impeg2d_next_start_code(ps_dec); return (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE; } /****************************************************************************** * * Function Name : impeg2d_dec_seq_ext * * Description : Gets additional sequence data. * * Arguments : * dec : Decoder Context * * Values Returned : None ******************************************************************************/ IMPEG2D_ERROR_CODES_T impeg2d_dec_seq_ext(dec_state_t *ps_dec) { stream_t *ps_stream; ps_stream = &ps_dec->s_bit_stream; if (impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) != EXTENSION_START_CODE) { impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN); return IMPEG2D_FRM_HDR_START_CODE_NOT_FOUND; } /* Flush the extension start code */ impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN); /* Flush extension start code identifier */ impeg2d_bit_stream_flush(ps_stream,4); /*----------------------------------------------------------------------*/ /* Profile and Level information */ /*----------------------------------------------------------------------*/ { UWORD32 u4_esc_bit, u4_profile, u4_level; /* Read the profile and level information */ /* check_profile_and_level: Table 8-1 */ /* [7:7] 1 Escape bit */ /* [6:4] 3 Profile identification */ /* [3:0] 4 Level identification */ u4_esc_bit = impeg2d_bit_stream_get_bit(ps_stream); u4_profile = impeg2d_bit_stream_get(ps_stream,3); u4_level = impeg2d_bit_stream_get(ps_stream,4); UNUSED(u4_profile); UNUSED(u4_level); /* if( escBit == 1 || profile < MPEG2_MAIN_PROFILE || level < MPEG2_MAIN_LEVEL) */ if (1 == u4_esc_bit) { return IMPEG2D_PROF_LEVEL_NOT_SUPPORTED; } } ps_dec->u2_progressive_sequence = impeg2d_bit_stream_get_bit(ps_stream); /* Read the chrominance format */ if(impeg2d_bit_stream_get(ps_stream,2) != 0x1) return IMPEG2D_CHROMA_FMT_NOT_SUP; /* Read the 2 most significant bits from horizontal_size */ ps_dec->u2_horizontal_size += (impeg2d_bit_stream_get(ps_stream,2) << 12); /* Read the 2 most significant bits from vertical_size */ ps_dec->u2_vertical_size += (impeg2d_bit_stream_get(ps_stream,2) << 12); /*-----------------------------------------------------------------------*/ /* Flush the following as they are not used now */ /* bit_rate_extension 12 */ /* marker_bit 1 */ /* vbv_buffer_size_extension 8 */ /* low_delay 1 */ /*-----------------------------------------------------------------------*/ impeg2d_bit_stream_flush(ps_stream,12); GET_MARKER_BIT(ps_dec,ps_stream); impeg2d_bit_stream_flush(ps_stream,9); /*-----------------------------------------------------------------------*/ /* frame_rate_extension_n 2 */ /* frame_rate_extension_d 5 */ /*-----------------------------------------------------------------------*/ ps_dec->u2_frame_rate_extension_n = impeg2d_bit_stream_get(ps_stream,2); ps_dec->u2_frame_rate_extension_d = impeg2d_bit_stream_get(ps_stream,5); return (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE; } /******************************************************************************* * * Function Name : impeg2d_dec_seq_disp_ext * * Description : This function is eqvt to sequence_display_extension() of * standard. It flushes data present as it is not being used * * Arguments : * dec : Decoder Context * * Values Returned : None ******************************************************************************/ void impeg2d_dec_seq_disp_ext(dec_state_t *ps_dec) { stream_t *ps_stream; ps_stream = &ps_dec->s_bit_stream; /* sequence_display_extension() { extension_start_code_identifier 4 video_format 3 colour_description 1 if (colour_description) { colour_primaries 8 transfer_characteristics 8 matrix_coefficients 8 } display_horizontal_size 14 marker_bit 1 display_vertical_size 14 next_start_code() } */ impeg2d_bit_stream_get(ps_stream,7); if (impeg2d_bit_stream_get_bit(ps_stream) == 1) { impeg2d_bit_stream_get(ps_stream,24); } /* display_horizontal_size and display_vertical_size */ ps_dec->u2_display_horizontal_size = impeg2d_bit_stream_get(ps_stream,14);; GET_MARKER_BIT(ps_dec,ps_stream); ps_dec->u2_display_vertical_size = impeg2d_bit_stream_get(ps_stream,14); impeg2d_next_start_code(ps_dec); } /******************************************************************************* * * Function Name : impeg2d_dec_seq_scale_ext * * Description : This function is eqvt to sequence_scalable_extension() of * standard. * * Arguments : Decoder context * * Values Returned : None *******************************************************************************/ IMPEG2D_ERROR_CODES_T impeg2d_dec_seq_scale_ext(dec_state_t *ps_dec) { UNUSED(ps_dec); return IMPEG2D_SCALABILITIY_NOT_SUPPORTED; } /******************************************************************************* * * Function Name : impeg2d_dec_quant_matrix_ext * * Description : Gets Intra and NonIntra quantizer matrix from the stream. * * Arguments : Decoder context * * Values Returned : None *******************************************************************************/ void impeg2d_dec_quant_matrix_ext(dec_state_t *ps_dec) { stream_t *ps_stream; ps_stream = &ps_dec->s_bit_stream; /* Flush extension_start_code_identifier */ impeg2d_bit_stream_flush(ps_stream,4); /*------------------------------------------------------------------------*/ /* Quantization matrix for the intra blocks */ /*------------------------------------------------------------------------*/ if(impeg2d_bit_stream_get(ps_stream,1) == 1) { UWORD16 i; for(i = 0; i < NUM_PELS_IN_BLOCK; i++) { ps_dec->au1_intra_quant_matrix[gau1_impeg2_inv_scan_zig_zag[i]] = (UWORD8)impeg2d_bit_stream_get(ps_stream,8); } } /*------------------------------------------------------------------------*/ /* Quantization matrix for the inter blocks */ /*------------------------------------------------------------------------*/ if(impeg2d_bit_stream_get(ps_stream,1) == 1) { UWORD16 i; for(i = 0; i < NUM_PELS_IN_BLOCK; i++) { ps_dec->au1_inter_quant_matrix[gau1_impeg2_inv_scan_zig_zag[i]] = (UWORD8)impeg2d_bit_stream_get(ps_stream,8); } } /* Note : chroma intra quantizer matrix and chroma non intra quantizer matrix are not needed for 4:2:0 format */ impeg2d_next_start_code(ps_dec); } /******************************************************************************* * * Function Name : impeg2d_dec_pic_disp_ext * * Description : This function is eqvt to picture_display_extension() of * standard.The parameters are not used by decoder * * Arguments : Pointer to dec_state_t * * Values Returned : Decoder context * * Values Returned : None *******************************************************************************/ void impeg2d_dec_pic_disp_ext(dec_state_t *ps_dec) { WORD16 i2_number_of_frame_centre_offsets ; stream_t *ps_stream; ps_stream = &ps_dec->s_bit_stream; impeg2d_bit_stream_flush(ps_stream,4); if (ps_dec->u2_progressive_sequence) { i2_number_of_frame_centre_offsets = (ps_dec->u2_repeat_first_field) ? 2 + ps_dec->u2_top_field_first : 1; } else { i2_number_of_frame_centre_offsets = (ps_dec->u2_picture_structure != FRAME_PICTURE) ? 1 : 2 + ps_dec->u2_repeat_first_field; } while(i2_number_of_frame_centre_offsets--) { /* frame_centre_horizontal_offset */ impeg2d_bit_stream_get(ps_stream,16); GET_MARKER_BIT(ps_dec,ps_stream); /* frame_centre_vertical_offset */ impeg2d_bit_stream_get(ps_stream,16); GET_MARKER_BIT(ps_dec,ps_stream); } impeg2d_next_start_code(ps_dec); } /******************************************************************************* * * Function Name : impeg2d_dec_itu_t_ext * * Description : This function is eqvt to ITU-T_extension() of * standard.The parameters are not used by decoder * * Arguments : Decoder context * * Values Returned : None *******************************************************************************/ void impeg2d_dec_itu_t_ext(dec_state_t *ps_dec) { impeg2d_bit_stream_flush(&ps_dec->s_bit_stream,EXT_ID_LEN); impeg2d_next_start_code(ps_dec); } /******************************************************************************* * Function Name : impeg2d_dec_copyright_ext * * Description : This function is eqvt to copyright_extension() of * standard. The parameters are not used by decoder * * Arguments : Decoder context * * Values Returned : None *******************************************************************************/ void impeg2d_dec_copyright_ext(dec_state_t *ps_dec) { UWORD32 u4_bits_to_flush; u4_bits_to_flush = COPYRIGHT_EXTENSION_LEN; while(u4_bits_to_flush >= 32 ) { impeg2d_bit_stream_flush(&ps_dec->s_bit_stream,32); u4_bits_to_flush = u4_bits_to_flush - 32; } if(u4_bits_to_flush > 0) { impeg2d_bit_stream_flush(&ps_dec->s_bit_stream,u4_bits_to_flush); } impeg2d_next_start_code(ps_dec); } /******************************************************************************* * Function Name : impeg2d_dec_cam_param_ext * * Description : This function is eqvt to camera_parameters_extension() of * standard. The parameters are not used by decoder * * Arguments : Decoder context * * Values Returned : None *******************************************************************************/ void impeg2d_dec_cam_param_ext(dec_state_t *ps_dec) { UWORD32 u4_bits_to_flush; u4_bits_to_flush = CAMERA_PARAMETER_EXTENSION_LEN; while(u4_bits_to_flush >= 32 ) { impeg2d_bit_stream_flush(&ps_dec->s_bit_stream,32); u4_bits_to_flush = u4_bits_to_flush - 32; } if(u4_bits_to_flush > 0) { impeg2d_bit_stream_flush(&ps_dec->s_bit_stream,u4_bits_to_flush); } impeg2d_next_start_code(ps_dec); } /******************************************************************************* * * Function Name : impeg2d_dec_grp_of_pic_hdr * * Description : Gets information at the GOP level. * * Arguments : Decoder context * * Values Returned : None *******************************************************************************/ void impeg2d_dec_grp_of_pic_hdr(dec_state_t *ps_dec) { UWORD32 u4_bits_to_flush; u4_bits_to_flush = GROUP_OF_PICTURE_LEN; while(u4_bits_to_flush >= 32 ) { impeg2d_bit_stream_flush(&ps_dec->s_bit_stream,32); u4_bits_to_flush = u4_bits_to_flush - 32; } if(u4_bits_to_flush > 0) { impeg2d_bit_stream_flush(&ps_dec->s_bit_stream,u4_bits_to_flush); } } /******************************************************************************* * * Function Name : impeg2d_dec_pic_hdr * * Description : Gets the picture header information. * * Arguments : Decoder context * * Values Returned : None *******************************************************************************/ IMPEG2D_ERROR_CODES_T impeg2d_dec_pic_hdr(dec_state_t *ps_dec) { stream_t *ps_stream; ps_stream = &ps_dec->s_bit_stream; impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN); /* Flush temporal reference */ impeg2d_bit_stream_get(ps_stream,10); /* Picture type */ ps_dec->e_pic_type = (e_pic_type_t)impeg2d_bit_stream_get(ps_stream,3); if((ps_dec->e_pic_type < I_PIC) || (ps_dec->e_pic_type > D_PIC)) { impeg2d_next_code(ps_dec, PICTURE_START_CODE); return IMPEG2D_INVALID_PIC_TYPE; } /* Flush vbv_delay */ impeg2d_bit_stream_get(ps_stream,16); if(ps_dec->e_pic_type == P_PIC || ps_dec->e_pic_type == B_PIC) { ps_dec->u2_full_pel_forw_vector = impeg2d_bit_stream_get_bit(ps_stream); ps_dec->u2_forw_f_code = impeg2d_bit_stream_get(ps_stream,3); } if(ps_dec->e_pic_type == B_PIC) { ps_dec->u2_full_pel_back_vector = impeg2d_bit_stream_get_bit(ps_stream); ps_dec->u2_back_f_code = impeg2d_bit_stream_get(ps_stream,3); } if(ps_dec->u2_is_mpeg2 == 0) { ps_dec->au2_f_code[0][0] = ps_dec->au2_f_code[0][1] = ps_dec->u2_forw_f_code; ps_dec->au2_f_code[1][0] = ps_dec->au2_f_code[1][1] = ps_dec->u2_back_f_code; } /*-----------------------------------------------------------------------*/ /* Flush the extra bit value */ /* */ /* while(impeg2d_bit_stream_nxt() == '1') */ /* { */ /* extra_bit_picture 1 */ /* extra_information_picture 8 */ /* } */ /* extra_bit_picture 1 */ /*-----------------------------------------------------------------------*/ while (impeg2d_bit_stream_nxt(ps_stream,1) == 1) { impeg2d_bit_stream_get(ps_stream,9); } impeg2d_bit_stream_get_bit(ps_stream); impeg2d_next_start_code(ps_dec); return (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE; } /******************************************************************************* * * Function Name : impeg2d_dec_pic_coding_ext * * Description : Reads more picture level parameters * * Arguments : * dec : Decoder context * * Values Returned : None *******************************************************************************/ void impeg2d_dec_pic_coding_ext(dec_state_t *ps_dec) { stream_t *ps_stream; ps_stream = &ps_dec->s_bit_stream; impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN); /* extension code identifier */ impeg2d_bit_stream_get(ps_stream,4); ps_dec->au2_f_code[0][0] = impeg2d_bit_stream_get(ps_stream,4); ps_dec->au2_f_code[0][1] = impeg2d_bit_stream_get(ps_stream,4); ps_dec->au2_f_code[1][0] = impeg2d_bit_stream_get(ps_stream,4); ps_dec->au2_f_code[1][1] = impeg2d_bit_stream_get(ps_stream,4); ps_dec->u2_intra_dc_precision = impeg2d_bit_stream_get(ps_stream,2); ps_dec->u2_picture_structure = impeg2d_bit_stream_get(ps_stream,2); ps_dec->u2_top_field_first = impeg2d_bit_stream_get_bit(ps_stream); ps_dec->u2_frame_pred_frame_dct = impeg2d_bit_stream_get_bit(ps_stream); ps_dec->u2_concealment_motion_vectors = impeg2d_bit_stream_get_bit(ps_stream); ps_dec->u2_q_scale_type = impeg2d_bit_stream_get_bit(ps_stream); ps_dec->u2_intra_vlc_format = impeg2d_bit_stream_get_bit(ps_stream); ps_dec->u2_alternate_scan = impeg2d_bit_stream_get_bit(ps_stream); ps_dec->u2_repeat_first_field = impeg2d_bit_stream_get_bit(ps_stream); /* Flush chroma_420_type */ impeg2d_bit_stream_get_bit(ps_stream); ps_dec->u2_progressive_frame = impeg2d_bit_stream_get_bit(ps_stream); if (impeg2d_bit_stream_get_bit(ps_stream)) { /* Flush v_axis, field_sequence, burst_amplitude, sub_carrier_phase */ impeg2d_bit_stream_flush(ps_stream,20); } impeg2d_next_start_code(ps_dec); if(VERTICAL_SCAN == ps_dec->u2_alternate_scan) { ps_dec->pu1_inv_scan_matrix = (UWORD8 *)gau1_impeg2_inv_scan_vertical; } else { ps_dec->pu1_inv_scan_matrix = (UWORD8 *)gau1_impeg2_inv_scan_zig_zag; } } /******************************************************************************* * * Function Name : impeg2d_dec_slice * * Description : Reads Slice level parameters and calls functions that * decode individual MBs of slice * * Arguments : * dec : Decoder context * * Values Returned : None *******************************************************************************/ IMPEG2D_ERROR_CODES_T impeg2d_dec_slice(dec_state_t *ps_dec) { stream_t *ps_stream; UWORD32 u4_slice_vertical_position; UWORD32 u4_slice_vertical_position_extension; IMPEG2D_ERROR_CODES_T e_error; ps_stream = &ps_dec->s_bit_stream; /*------------------------------------------------------------------------*/ /* All the profiles supported require restricted slice structure. Hence */ /* there is no need to store slice_vertical_position. Note that max */ /* height supported does not exceed 2800 and scalablity is not supported */ /*------------------------------------------------------------------------*/ /* Remove the slice start code */ impeg2d_bit_stream_flush(ps_stream,START_CODE_PREFIX_LEN); u4_slice_vertical_position = impeg2d_bit_stream_get(ps_stream, 8); if(u4_slice_vertical_position > 2800) { u4_slice_vertical_position_extension = impeg2d_bit_stream_get(ps_stream, 3); u4_slice_vertical_position += (u4_slice_vertical_position_extension << 7); } if((u4_slice_vertical_position > ps_dec->u2_num_vert_mb) || (u4_slice_vertical_position == 0)) { return IMPEG2D_INVALID_VERT_SIZE; } // change the mb_y to point to slice_vertical_position u4_slice_vertical_position--; if (ps_dec->u2_mb_y != u4_slice_vertical_position) { ps_dec->u2_mb_y = u4_slice_vertical_position; ps_dec->u2_mb_x = 0; } ps_dec->u2_first_mb = 1; /*------------------------------------------------------------------------*/ /* Quant scale code decoding */ /*------------------------------------------------------------------------*/ { UWORD16 u2_quant_scale_code; u2_quant_scale_code = impeg2d_bit_stream_get(ps_stream,5); ps_dec->u1_quant_scale = (ps_dec->u2_q_scale_type) ? gau1_impeg2_non_linear_quant_scale[u2_quant_scale_code] : (u2_quant_scale_code << 1); } if (impeg2d_bit_stream_nxt(ps_stream,1) == 1) { impeg2d_bit_stream_flush(ps_stream,9); /* Flush extra bit information */ while (impeg2d_bit_stream_nxt(ps_stream,1) == 1) { impeg2d_bit_stream_flush(ps_stream,9); } } impeg2d_bit_stream_get_bit(ps_stream); /* Reset the DC predictors to reset values given in Table 7.2 at the start*/ /* of slice data */ ps_dec->u2_def_dc_pred[Y_LUMA] = 128 << ps_dec->u2_intra_dc_precision; ps_dec->u2_def_dc_pred[U_CHROMA] = 128 << ps_dec->u2_intra_dc_precision; ps_dec->u2_def_dc_pred[V_CHROMA] = 128 << ps_dec->u2_intra_dc_precision; /*------------------------------------------------------------------------*/ /* dec->DecMBsinSlice() implements the following psuedo code from standard*/ /* do */ /* { */ /* macroblock() */ /* } while (impeg2d_bit_stream_nxt() != '000 0000 0000 0000 0000 0000') */ /*------------------------------------------------------------------------*/ e_error = ps_dec->pf_decode_slice(ps_dec); if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error) { return e_error; } /* Check for the MBy index instead of number of MBs left, because the * number of MBs left in case of multi-thread decode is the number of MBs * in that row only */ if(ps_dec->u2_mb_y < ps_dec->u2_num_vert_mb) impeg2d_next_start_code(ps_dec); return (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE; } void impeg2d_dec_pic_data_thread(dec_state_t *ps_dec) { WORD32 i4_continue_decode; WORD32 i4_cur_row, temp; UWORD32 u4_bits_read; WORD32 i4_dequeue_job; IMPEG2D_ERROR_CODES_T e_error; i4_cur_row = ps_dec->u2_mb_y + 1; i4_continue_decode = 1; i4_dequeue_job = 1; do { if(i4_cur_row > ps_dec->u2_num_vert_mb) { i4_continue_decode = 0; break; } { if((ps_dec->i4_num_cores> 1) && (i4_dequeue_job)) { job_t s_job; IV_API_CALL_STATUS_T e_ret; UWORD8 *pu1_buf; e_ret = impeg2_jobq_dequeue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 1); if(e_ret != IV_SUCCESS) break; if(CMD_PROCESS == s_job.i4_cmd) { pu1_buf = ps_dec->pu1_inp_bits_buf + s_job.i4_bistream_ofst; impeg2d_bit_stream_init(&(ps_dec->s_bit_stream), pu1_buf, (ps_dec->u4_num_inp_bytes - s_job.i4_bistream_ofst) + 8); i4_cur_row = s_job.i2_start_mb_y; ps_dec->i4_start_mb_y = s_job.i2_start_mb_y; ps_dec->i4_end_mb_y = s_job.i2_end_mb_y; ps_dec->u2_mb_x = 0; ps_dec->u2_mb_y = ps_dec->i4_start_mb_y; ps_dec->u2_num_mbs_left = (ps_dec->i4_end_mb_y - ps_dec->i4_start_mb_y) * ps_dec->u2_num_horiz_mb; } else { WORD32 start_row; WORD32 num_rows; start_row = s_job.i2_start_mb_y << 4; num_rows = MIN((s_job.i2_end_mb_y << 4), ps_dec->u2_vertical_size); num_rows -= start_row; if(ps_dec->u4_deinterlace && (0 == ps_dec->u2_progressive_frame)) { impeg2d_deinterlace(ps_dec, ps_dec->ps_disp_pic, ps_dec->ps_disp_frm_buf, start_row, num_rows); } else { impeg2d_format_convert(ps_dec, ps_dec->ps_disp_pic, ps_dec->ps_disp_frm_buf, start_row, num_rows); } break; } } e_error = impeg2d_dec_slice(ps_dec); if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error) { impeg2d_next_start_code(ps_dec); } } /* Detecting next slice start code */ while(1) { // skip (dec->u4_num_cores-1) rows u4_bits_read = impeg2d_bit_stream_nxt(&ps_dec->s_bit_stream,START_CODE_LEN); temp = u4_bits_read & 0xFF; i4_continue_decode = (((u4_bits_read >> 8) == 0x01) && (temp) && (temp <= 0xAF)); if(i4_continue_decode) { /* If the slice is from the same row, then continue decoding without dequeue */ if((temp - 1) == i4_cur_row) { i4_dequeue_job = 0; break; } if(temp < ps_dec->i4_end_mb_y) { i4_cur_row = ps_dec->u2_mb_y; } else { i4_dequeue_job = 1; } break; } else break; } }while(i4_continue_decode); if(ps_dec->i4_num_cores > 1) { while(1) { job_t s_job; IV_API_CALL_STATUS_T e_ret; e_ret = impeg2_jobq_dequeue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 1); if(e_ret != IV_SUCCESS) break; if(CMD_FMTCONV == s_job.i4_cmd) { WORD32 start_row; WORD32 num_rows; start_row = s_job.i2_start_mb_y << 4; num_rows = MIN((s_job.i2_end_mb_y << 4), ps_dec->u2_vertical_size); num_rows -= start_row; if(ps_dec->u4_deinterlace && (0 == ps_dec->u2_progressive_frame)) { impeg2d_deinterlace(ps_dec, ps_dec->ps_disp_pic, ps_dec->ps_disp_frm_buf, start_row, num_rows); } else { impeg2d_format_convert(ps_dec, ps_dec->ps_disp_pic, ps_dec->ps_disp_frm_buf, start_row, num_rows); } } } } else { if((NULL != ps_dec->ps_disp_pic) && ((0 == ps_dec->u4_share_disp_buf) || (IV_YUV_420P != ps_dec->i4_chromaFormat))) { if(ps_dec->u4_deinterlace && (0 == ps_dec->u2_progressive_frame)) { impeg2d_deinterlace(ps_dec, ps_dec->ps_disp_pic, ps_dec->ps_disp_frm_buf, 0, ps_dec->u2_vertical_size); } else { impeg2d_format_convert(ps_dec, ps_dec->ps_disp_pic, ps_dec->ps_disp_frm_buf, 0, ps_dec->u2_vertical_size); } } } } static WORD32 impeg2d_init_thread_dec_ctxt(dec_state_t *ps_dec, dec_state_t *ps_dec_thd, WORD32 i4_min_mb_y) { UNUSED(i4_min_mb_y); ps_dec_thd->i4_start_mb_y = 0; ps_dec_thd->i4_end_mb_y = ps_dec->u2_num_vert_mb; ps_dec_thd->u2_mb_x = 0; ps_dec_thd->u2_mb_y = 0; ps_dec_thd->u2_is_mpeg2 = ps_dec->u2_is_mpeg2; ps_dec_thd->u2_frame_width = ps_dec->u2_frame_width; ps_dec_thd->u2_frame_height = ps_dec->u2_frame_height; ps_dec_thd->u2_picture_width = ps_dec->u2_picture_width; ps_dec_thd->u2_horizontal_size = ps_dec->u2_horizontal_size; ps_dec_thd->u2_vertical_size = ps_dec->u2_vertical_size; ps_dec_thd->u2_create_max_width = ps_dec->u2_create_max_width; ps_dec_thd->u2_create_max_height = ps_dec->u2_create_max_height; ps_dec_thd->u2_header_done = ps_dec->u2_header_done; ps_dec_thd->u2_decode_header = ps_dec->u2_decode_header; ps_dec_thd->u2_num_horiz_mb = ps_dec->u2_num_horiz_mb; ps_dec_thd->u2_num_vert_mb = ps_dec->u2_num_vert_mb; ps_dec_thd->u2_num_flds_decoded = ps_dec->u2_num_flds_decoded; ps_dec_thd->u4_frm_buf_stride = ps_dec->u4_frm_buf_stride; ps_dec_thd->u2_field_dct = ps_dec->u2_field_dct; ps_dec_thd->u2_read_dct_type = ps_dec->u2_read_dct_type; ps_dec_thd->u2_read_motion_type = ps_dec->u2_read_motion_type; ps_dec_thd->u2_motion_type = ps_dec->u2_motion_type; ps_dec_thd->pu2_mb_type = ps_dec->pu2_mb_type; ps_dec_thd->u2_fld_pic = ps_dec->u2_fld_pic; ps_dec_thd->u2_frm_pic = ps_dec->u2_frm_pic; ps_dec_thd->u2_fld_parity = ps_dec->u2_fld_parity; ps_dec_thd->au2_fcode_data[0] = ps_dec->au2_fcode_data[0]; ps_dec_thd->au2_fcode_data[1] = ps_dec->au2_fcode_data[1]; ps_dec_thd->u1_quant_scale = ps_dec->u1_quant_scale; ps_dec_thd->u2_num_mbs_left = ps_dec->u2_num_mbs_left; ps_dec_thd->u2_first_mb = ps_dec->u2_first_mb; ps_dec_thd->u2_num_skipped_mbs = ps_dec->u2_num_skipped_mbs; memcpy(&ps_dec_thd->s_cur_frm_buf, &ps_dec->s_cur_frm_buf, sizeof(yuv_buf_t)); memcpy(&ps_dec_thd->as_recent_fld[0][0], &ps_dec->as_recent_fld[0][0], sizeof(yuv_buf_t)); memcpy(&ps_dec_thd->as_recent_fld[0][1], &ps_dec->as_recent_fld[0][1], sizeof(yuv_buf_t)); memcpy(&ps_dec_thd->as_recent_fld[1][0], &ps_dec->as_recent_fld[1][0], sizeof(yuv_buf_t)); memcpy(&ps_dec_thd->as_recent_fld[1][1], &ps_dec->as_recent_fld[1][1], sizeof(yuv_buf_t)); memcpy(&ps_dec_thd->as_ref_buf, &ps_dec->as_ref_buf, sizeof(yuv_buf_t) * 2 * 2); ps_dec_thd->pf_decode_slice = ps_dec->pf_decode_slice; ps_dec_thd->pf_vld_inv_quant = ps_dec->pf_vld_inv_quant; memcpy(ps_dec_thd->pf_idct_recon, ps_dec->pf_idct_recon, sizeof(ps_dec->pf_idct_recon)); memcpy(ps_dec_thd->pf_mc, ps_dec->pf_mc, sizeof(ps_dec->pf_mc)); ps_dec_thd->pf_interpolate = ps_dec->pf_interpolate; ps_dec_thd->pf_copy_mb = ps_dec->pf_copy_mb; ps_dec_thd->pf_fullx_halfy_8x8 = ps_dec->pf_fullx_halfy_8x8; ps_dec_thd->pf_halfx_fully_8x8 = ps_dec->pf_halfx_fully_8x8; ps_dec_thd->pf_halfx_halfy_8x8 = ps_dec->pf_halfx_halfy_8x8; ps_dec_thd->pf_fullx_fully_8x8 = ps_dec->pf_fullx_fully_8x8; ps_dec_thd->pf_memset_8bit_8x8_block = ps_dec->pf_memset_8bit_8x8_block; ps_dec_thd->pf_memset_16bit_8x8_linear_block = ps_dec->pf_memset_16bit_8x8_linear_block; ps_dec_thd->pf_copy_yuv420p_buf = ps_dec->pf_copy_yuv420p_buf; ps_dec_thd->pf_fmt_conv_yuv420p_to_yuv422ile = ps_dec->pf_fmt_conv_yuv420p_to_yuv422ile; ps_dec_thd->pf_fmt_conv_yuv420p_to_yuv420sp_uv = ps_dec->pf_fmt_conv_yuv420p_to_yuv420sp_uv; ps_dec_thd->pf_fmt_conv_yuv420p_to_yuv420sp_vu = ps_dec->pf_fmt_conv_yuv420p_to_yuv420sp_vu; memcpy(ps_dec_thd->au1_intra_quant_matrix, ps_dec->au1_intra_quant_matrix, NUM_PELS_IN_BLOCK * sizeof(UWORD8)); memcpy(ps_dec_thd->au1_inter_quant_matrix, ps_dec->au1_inter_quant_matrix, NUM_PELS_IN_BLOCK * sizeof(UWORD8)); ps_dec_thd->pu1_inv_scan_matrix = ps_dec->pu1_inv_scan_matrix; ps_dec_thd->u2_progressive_sequence = ps_dec->u2_progressive_sequence; ps_dec_thd->e_pic_type = ps_dec->e_pic_type; ps_dec_thd->u2_full_pel_forw_vector = ps_dec->u2_full_pel_forw_vector; ps_dec_thd->u2_forw_f_code = ps_dec->u2_forw_f_code; ps_dec_thd->u2_full_pel_back_vector = ps_dec->u2_full_pel_back_vector; ps_dec_thd->u2_back_f_code = ps_dec->u2_back_f_code; memcpy(ps_dec_thd->ai2_mv, ps_dec->ai2_mv, (2*2*2)*sizeof(WORD16)); memcpy(ps_dec_thd->au2_f_code, ps_dec->au2_f_code, (2*2)*sizeof(UWORD16)); ps_dec_thd->u2_intra_dc_precision = ps_dec->u2_intra_dc_precision; ps_dec_thd->u2_picture_structure = ps_dec->u2_picture_structure; ps_dec_thd->u2_top_field_first = ps_dec->u2_top_field_first; ps_dec_thd->u2_frame_pred_frame_dct = ps_dec->u2_frame_pred_frame_dct; ps_dec_thd->u2_concealment_motion_vectors = ps_dec->u2_concealment_motion_vectors; ps_dec_thd->u2_q_scale_type = ps_dec->u2_q_scale_type; ps_dec_thd->u2_intra_vlc_format = ps_dec->u2_intra_vlc_format; ps_dec_thd->u2_alternate_scan = ps_dec->u2_alternate_scan; ps_dec_thd->u2_repeat_first_field = ps_dec->u2_repeat_first_field; ps_dec_thd->u2_progressive_frame = ps_dec->u2_progressive_frame; ps_dec_thd->pu1_inp_bits_buf = ps_dec->pu1_inp_bits_buf; ps_dec_thd->u4_num_inp_bytes = ps_dec->u4_num_inp_bytes; ps_dec_thd->pv_jobq = ps_dec->pv_jobq; ps_dec_thd->pv_jobq_buf = ps_dec->pv_jobq_buf; ps_dec_thd->i4_jobq_buf_size = ps_dec->i4_jobq_buf_size; ps_dec_thd->u2_frame_rate_code = ps_dec->u2_frame_rate_code; ps_dec_thd->u2_frame_rate_extension_n = ps_dec->u2_frame_rate_extension_n; ps_dec_thd->u2_frame_rate_extension_d = ps_dec->u2_frame_rate_extension_d; ps_dec_thd->u2_framePeriod = ps_dec->u2_framePeriod; ps_dec_thd->u2_display_horizontal_size = ps_dec->u2_display_horizontal_size; ps_dec_thd->u2_display_vertical_size = ps_dec->u2_display_vertical_size; ps_dec_thd->u2_aspect_ratio_info = ps_dec->u2_aspect_ratio_info; ps_dec_thd->ps_func_bi_direct = ps_dec->ps_func_bi_direct; ps_dec_thd->ps_func_forw_or_back = ps_dec->ps_func_forw_or_back; ps_dec_thd->pv_deinterlacer_ctxt = ps_dec->pv_deinterlacer_ctxt; ps_dec_thd->ps_deint_pic = ps_dec->ps_deint_pic; return 0; } WORD32 impeg2d_get_slice_pos(dec_state_multi_core_t *ps_dec_state_multi_core) { WORD32 u4_bits; WORD32 i4_row; dec_state_t *ps_dec = ps_dec_state_multi_core->ps_dec_state[0]; WORD32 i4_prev_row; stream_t s_bitstrm; WORD32 i4_start_row; WORD32 i4_slice_bistream_ofst; WORD32 i; s_bitstrm = ps_dec->s_bit_stream; i4_prev_row = -1; ps_dec_state_multi_core->ps_dec_state[0]->i4_start_mb_y = 0; ps_dec_state_multi_core->ps_dec_state[1]->i4_start_mb_y = -1; ps_dec_state_multi_core->ps_dec_state[2]->i4_start_mb_y = -1; ps_dec_state_multi_core->ps_dec_state[3]->i4_start_mb_y = -1; ps_dec_state_multi_core->ps_dec_state[0]->i4_end_mb_y = ps_dec->u2_num_vert_mb; ps_dec_state_multi_core->ps_dec_state[1]->i4_end_mb_y = -1; ps_dec_state_multi_core->ps_dec_state[2]->i4_end_mb_y = -1; ps_dec_state_multi_core->ps_dec_state[3]->i4_end_mb_y = -1; if(ps_dec->i4_num_cores == 1) return 0; /* Reset the jobq to start of the jobq buffer */ impeg2_jobq_reset((jobq_t *)ps_dec->pv_jobq); i4_start_row = -1; i4_slice_bistream_ofst = 0; while(1) { WORD32 i4_is_slice; if(s_bitstrm.u4_offset + START_CODE_LEN >= s_bitstrm.u4_max_offset) { break; } u4_bits = impeg2d_bit_stream_nxt(&s_bitstrm,START_CODE_LEN); i4_row = u4_bits & 0xFF; /* Detect end of frame */ i4_is_slice = (((u4_bits >> 8) == 0x01) && (i4_row) && (i4_row <= ps_dec->u2_num_vert_mb)); if(!i4_is_slice) break; i4_row -= 1; if(i4_prev_row != i4_row) { /* Create a job for previous slice row */ if(i4_start_row != -1) { job_t s_job; IV_API_CALL_STATUS_T ret; s_job.i2_start_mb_y = i4_start_row; s_job.i2_end_mb_y = i4_row; s_job.i4_cmd = CMD_PROCESS; s_job.i4_bistream_ofst = i4_slice_bistream_ofst; ret = impeg2_jobq_queue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 0); if(ret != IV_SUCCESS) return ret; } /* Store current slice's bitstream offset */ i4_slice_bistream_ofst = s_bitstrm.u4_offset >> 3; i4_slice_bistream_ofst -= (size_t)s_bitstrm.pv_bs_buf & 3; i4_prev_row = i4_row; /* Store current slice's row position */ i4_start_row = i4_row; } impeg2d_bit_stream_flush(&s_bitstrm, START_CODE_LEN); // flush bytes till next start code /* Flush the bytes till a start code is encountered */ while(impeg2d_bit_stream_nxt(&s_bitstrm, 24) != START_CODE_PREFIX) { impeg2d_bit_stream_get(&s_bitstrm, 8); if(s_bitstrm.u4_offset >= s_bitstrm.u4_max_offset) { break; } } } /* Create job for the last slice row */ { job_t s_job; IV_API_CALL_STATUS_T e_ret; s_job.i2_start_mb_y = i4_start_row; s_job.i2_end_mb_y = ps_dec->u2_num_vert_mb; s_job.i4_cmd = CMD_PROCESS; s_job.i4_bistream_ofst = i4_slice_bistream_ofst; e_ret = impeg2_jobq_queue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 0); if(e_ret != IV_SUCCESS) return e_ret; } if((NULL != ps_dec->ps_disp_pic) && ((0 == ps_dec->u4_share_disp_buf) || (IV_YUV_420P != ps_dec->i4_chromaFormat))) { for(i = 0; i < ps_dec->u2_vertical_size; i+=64) { job_t s_job; IV_API_CALL_STATUS_T ret; s_job.i2_start_mb_y = i; s_job.i2_start_mb_y >>= 4; s_job.i2_end_mb_y = (i + 64); s_job.i2_end_mb_y >>= 4; s_job.i4_cmd = CMD_FMTCONV; s_job.i4_bistream_ofst = 0; ret = impeg2_jobq_queue(ps_dec->pv_jobq, &s_job, sizeof(s_job), 1, 0); if(ret != IV_SUCCESS) return ret; } } impeg2_jobq_terminate(ps_dec->pv_jobq); ps_dec->i4_bytes_consumed = s_bitstrm.u4_offset >> 3; ps_dec->i4_bytes_consumed -= ((size_t)s_bitstrm.pv_bs_buf & 3); return 0; } /******************************************************************************* * * Function Name : impeg2d_dec_pic_data * * Description : It intializes several parameters and decodes a Picture * till any slice is left. * * Arguments : * dec : Decoder context * * Values Returned : None *******************************************************************************/ void impeg2d_dec_pic_data(dec_state_t *ps_dec) { WORD32 i; dec_state_multi_core_t *ps_dec_state_multi_core; UWORD32 u4_error_code; dec_state_t *ps_dec_thd; WORD32 i4_status; WORD32 i4_min_mb_y; /* Resetting the MB address and MB coordinates at the start of the Frame */ ps_dec->u2_mb_x = ps_dec->u2_mb_y = 0; u4_error_code = 0; ps_dec_state_multi_core = ps_dec->ps_dec_state_multi_core; impeg2d_get_slice_pos(ps_dec_state_multi_core); i4_min_mb_y = 1; for(i=0; i < ps_dec->i4_num_cores - 1; i++) { // initialize decoder context for thread // launch dec->u4_num_cores-1 threads ps_dec_thd = ps_dec_state_multi_core->ps_dec_state[i+1]; ps_dec_thd->ps_disp_pic = ps_dec->ps_disp_pic; ps_dec_thd->ps_disp_frm_buf = ps_dec->ps_disp_frm_buf; i4_status = impeg2d_init_thread_dec_ctxt(ps_dec, ps_dec_thd, i4_min_mb_y); //impeg2d_dec_pic_data_thread(ps_dec_thd); if(i4_status == 0) { ithread_create(ps_dec_thd->pv_codec_thread_handle, NULL, (void *)impeg2d_dec_pic_data_thread, ps_dec_thd); ps_dec_state_multi_core->au4_thread_launched[i + 1] = 1; i4_min_mb_y = ps_dec_thd->u2_mb_y + 1; } else { ps_dec_state_multi_core->au4_thread_launched[i + 1] = 0; break; } } impeg2d_dec_pic_data_thread(ps_dec); // wait for threads to complete for(i=0; i < (ps_dec->i4_num_cores - 1); i++) { if(ps_dec_state_multi_core->au4_thread_launched[i + 1] == 1) { ps_dec_thd = ps_dec_state_multi_core->ps_dec_state[i+1]; ithread_join(ps_dec_thd->pv_codec_thread_handle, NULL); } } ps_dec->u4_error_code = u4_error_code; } /******************************************************************************* * * Function Name : impeg2d_flush_ext_and_user_data * * Description : Flushes the extension and user data present in the * stream_t * * Arguments : * dec : Decoder context * * Values Returned : None *******************************************************************************/ void impeg2d_flush_ext_and_user_data(dec_state_t *ps_dec) { UWORD32 u4_start_code; stream_t *ps_stream; ps_stream = &ps_dec->s_bit_stream; u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN); while(u4_start_code == EXTENSION_START_CODE || u4_start_code == USER_DATA_START_CODE) { impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN); while(impeg2d_bit_stream_nxt(ps_stream,START_CODE_PREFIX_LEN) != START_CODE_PREFIX) { impeg2d_bit_stream_flush(ps_stream,8); } u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN); } } /******************************************************************************* * * Function Name : impeg2d_dec_user_data * * Description : Flushes the user data present in the stream_t * * Arguments : * dec : Decoder context * * Values Returned : None *******************************************************************************/ void impeg2d_dec_user_data(dec_state_t *ps_dec) { UWORD32 u4_start_code; stream_t *ps_stream; ps_stream = &ps_dec->s_bit_stream; u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN); while(u4_start_code == USER_DATA_START_CODE) { impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN); while(impeg2d_bit_stream_nxt(ps_stream,START_CODE_PREFIX_LEN) != START_CODE_PREFIX) { impeg2d_bit_stream_flush(ps_stream,8); } u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN); } } /******************************************************************************* * Function Name : impeg2d_dec_seq_ext_data * * Description : Decodes the extension data following Sequence * Extension. It flushes any user data if present * * Arguments : * dec : Decoder context * * Values Returned : None *******************************************************************************/ IMPEG2D_ERROR_CODES_T impeg2d_dec_seq_ext_data(dec_state_t *ps_dec) { stream_t *ps_stream; UWORD32 u4_start_code; IMPEG2D_ERROR_CODES_T e_error; e_error = (IMPEG2D_ERROR_CODES_T) IVD_ERROR_NONE; ps_stream = &ps_dec->s_bit_stream; u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN); while( (u4_start_code == EXTENSION_START_CODE || u4_start_code == USER_DATA_START_CODE) && (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE == e_error) { if(u4_start_code == USER_DATA_START_CODE) { impeg2d_dec_user_data(ps_dec); } else { impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN); u4_start_code = impeg2d_bit_stream_nxt(ps_stream,EXT_ID_LEN); switch(u4_start_code) { case SEQ_DISPLAY_EXT_ID: impeg2d_dec_seq_disp_ext(ps_dec); break; case SEQ_SCALABLE_EXT_ID: e_error = IMPEG2D_SCALABILITIY_NOT_SUPPORTED; break; default: /* In case its a reserved extension code */ impeg2d_bit_stream_flush(ps_stream,EXT_ID_LEN); impeg2d_peek_next_start_code(ps_dec); break; } } u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN); } return e_error; } /******************************************************************************* * Function Name : impeg2d_dec_pic_ext_data * * Description : Decodes the extension data following Picture Coding * Extension. It flushes any user data if present * * Arguments : * dec : Decoder context * * Values Returned : None *******************************************************************************/ IMPEG2D_ERROR_CODES_T impeg2d_dec_pic_ext_data(dec_state_t *ps_dec) { stream_t *ps_stream; UWORD32 u4_start_code; IMPEG2D_ERROR_CODES_T e_error; e_error = (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE; ps_stream = &ps_dec->s_bit_stream; u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN); while ( (u4_start_code == EXTENSION_START_CODE || u4_start_code == USER_DATA_START_CODE) && (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE == e_error) { if(u4_start_code == USER_DATA_START_CODE) { impeg2d_dec_user_data(ps_dec); } else { impeg2d_bit_stream_flush(ps_stream,START_CODE_LEN); u4_start_code = impeg2d_bit_stream_nxt(ps_stream,EXT_ID_LEN); switch(u4_start_code) { case QUANT_MATRIX_EXT_ID: impeg2d_dec_quant_matrix_ext(ps_dec); break; case COPYRIGHT_EXT_ID: impeg2d_dec_copyright_ext(ps_dec); break; case PIC_DISPLAY_EXT_ID: impeg2d_dec_pic_disp_ext(ps_dec); break; case CAMERA_PARAM_EXT_ID: impeg2d_dec_cam_param_ext(ps_dec); break; case ITU_T_EXT_ID: impeg2d_dec_itu_t_ext(ps_dec); break; case PIC_SPATIAL_SCALABLE_EXT_ID: case PIC_TEMPORAL_SCALABLE_EXT_ID: e_error = IMPEG2D_SCALABLITY_NOT_SUP; break; default: /* In case its a reserved extension code */ impeg2d_bit_stream_flush(ps_stream,EXT_ID_LEN); impeg2d_next_start_code(ps_dec); break; } } u4_start_code = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN); } return e_error; } /******************************************************************************* * * Function Name : impeg2d_process_video_header * * Description : Processes video sequence header information * * Arguments : * dec : Decoder context * * Values Returned : None *******************************************************************************/ IMPEG2D_ERROR_CODES_T impeg2d_process_video_header(dec_state_t *ps_dec) { stream_t *ps_stream; ps_stream = &ps_dec->s_bit_stream; IMPEG2D_ERROR_CODES_T e_error; impeg2d_next_code(ps_dec, SEQUENCE_HEADER_CODE); if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset) { e_error = impeg2d_dec_seq_hdr(ps_dec); if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error) { return e_error; } } else { return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR; } if (impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) == EXTENSION_START_CODE) { /* MPEG2 Decoder */ if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset) { e_error = impeg2d_dec_seq_ext(ps_dec); if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error) { return e_error; } } else { return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR; } if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset) { e_error = impeg2d_dec_seq_ext_data(ps_dec); if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error) { return e_error; } } return impeg2d_init_video_state(ps_dec,MPEG_2_VIDEO); } else { /* MPEG1 Decoder */ if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset) { impeg2d_flush_ext_and_user_data(ps_dec); } return impeg2d_init_video_state(ps_dec,MPEG_1_VIDEO); } } /******************************************************************************* * * Function Name : impeg2d_process_video_bit_stream * * Description : Processes video sequence header information * * Arguments : * dec : Decoder context * * Values Returned : None *******************************************************************************/ IMPEG2D_ERROR_CODES_T impeg2d_process_video_bit_stream(dec_state_t *ps_dec) { stream_t *ps_stream; UWORD32 u4_next_bits, u4_start_code_found; IMPEG2D_ERROR_CODES_T e_error; ps_stream = &ps_dec->s_bit_stream; impeg2d_next_start_code(ps_dec); /* If the stream is MPEG-2 compliant stream */ u4_start_code_found = 0; if(ps_dec->u2_is_mpeg2) { /* MPEG2 decoding starts */ while((u4_start_code_found == 0) && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)) { u4_next_bits = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN); if(u4_next_bits == SEQUENCE_HEADER_CODE) { if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset) { e_error = impeg2d_dec_seq_hdr(ps_dec); if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error) { return e_error; } u4_start_code_found = 0; } else { return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR; } if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset) { IMPEG2D_ERROR_CODES_T e_error; e_error = impeg2d_dec_seq_ext(ps_dec); if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error) { return e_error; } u4_start_code_found = 0; } else { return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR; } } else if((u4_next_bits == USER_DATA_START_CODE) || (u4_next_bits == EXTENSION_START_CODE)) { if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset) { impeg2d_dec_seq_ext_data(ps_dec); u4_start_code_found = 0; } } else if((ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset) && (u4_next_bits == GOP_START_CODE)) { impeg2d_dec_grp_of_pic_hdr(ps_dec); impeg2d_dec_user_data(ps_dec); u4_start_code_found = 0; } else if((ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset) && (u4_next_bits == PICTURE_START_CODE)) { e_error = impeg2d_dec_pic_hdr(ps_dec); if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error) { return e_error; } impeg2d_dec_pic_coding_ext(ps_dec); e_error = impeg2d_dec_pic_ext_data(ps_dec); if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error) { return e_error; } impeg2d_pre_pic_dec_proc(ps_dec); impeg2d_dec_pic_data(ps_dec); impeg2d_post_pic_dec_proc(ps_dec); u4_start_code_found = 1; } else { FLUSH_BITS(ps_dec->s_bit_stream.u4_offset, ps_dec->s_bit_stream.u4_buf, ps_dec->s_bit_stream.u4_buf_nxt, 8, ps_dec->s_bit_stream.pu4_buf_aligned); } if(u4_start_code_found == 0) { impeg2d_next_start_code(ps_dec); } } if((u4_start_code_found == 0) && (ps_dec->s_bit_stream.u4_offset > ps_dec->s_bit_stream.u4_max_offset)) { return IMPEG2D_FRM_HDR_START_CODE_NOT_FOUND; } } /* If the stream is MPEG-1 compliant stream */ else { while((u4_start_code_found == 0) && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)) { u4_next_bits = impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN); if(impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) == SEQUENCE_HEADER_CODE) { if(ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset) { e_error = impeg2d_dec_seq_hdr(ps_dec); if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error) { return e_error; } u4_start_code_found = 0; } else { return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR; } } else if((ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset) && (u4_next_bits == EXTENSION_START_CODE || u4_next_bits == USER_DATA_START_CODE)) { impeg2d_flush_ext_and_user_data(ps_dec); u4_start_code_found = 0; } else if ((impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) == GOP_START_CODE) && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)) { impeg2d_dec_grp_of_pic_hdr(ps_dec); impeg2d_flush_ext_and_user_data(ps_dec); u4_start_code_found = 0; } else if ((impeg2d_bit_stream_nxt(ps_stream,START_CODE_LEN) == PICTURE_START_CODE) && (ps_dec->s_bit_stream.u4_offset < ps_dec->s_bit_stream.u4_max_offset)) { e_error = impeg2d_dec_pic_hdr(ps_dec); if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error) { return e_error; } impeg2d_flush_ext_and_user_data(ps_dec); impeg2d_pre_pic_dec_proc(ps_dec); impeg2d_dec_pic_data(ps_dec); impeg2d_post_pic_dec_proc(ps_dec); u4_start_code_found = 1; } else { FLUSH_BITS(ps_dec->s_bit_stream.u4_offset, ps_dec->s_bit_stream.u4_buf, ps_dec->s_bit_stream.u4_buf_nxt, 8, ps_dec->s_bit_stream.pu4_buf_aligned); } impeg2d_next_start_code(ps_dec); } if((u4_start_code_found == 0) && (ps_dec->s_bit_stream.u4_offset > ps_dec->s_bit_stream.u4_max_offset)) { return IMPEG2D_FRM_HDR_START_CODE_NOT_FOUND; } } return (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE; }