Decoder: Reduced memory requirements

Memory allocations are now done based on contents of SPS
API changed to move allocations inside the library

Also changed strlen to strnlen

Bug: 24221026

Change-Id: I9130457f564cddb4da7ec6399cc9fe88ee871217

1 files changed, 4 insertions, 87 deletions

diff --git a/decoder/ih264d_parse_headers.c b/decoder/ih264d_parse_headers.c
index 21ebfa8..e97f457 100644
--- a/decoder/ih264d_parse_headers.c
+++ b/decoder/ih264d_parse_headers.c
@@ -567,6 +567,10 @@ WORD32 ih264d_parse_sps(dec_struct_t *ps_dec, dec_bit_stream_t *ps_bitstrm)
 
     ps_seq = ps_dec->pv_scratch_sps_pps;
     *ps_seq = ps_dec->ps_sps[u1_seq_parameter_set_id];
+
+    if(NULL == ps_dec->ps_cur_sps)
+        ps_dec->ps_cur_sps = ps_seq;
+
     ps_seq->u1_profile_idc = u1_profile_idc;
     ps_seq->u1_level_idc = u1_level_idc;
     ps_seq->u1_seq_parameter_set_id = u1_seq_parameter_set_id;
@@ -734,12 +738,6 @@ WORD32 ih264d_parse_sps(dec_struct_t *ps_dec, dec_bit_stream_t *ps_bitstrm)
         return ERROR_NUM_REF;
     }
     ps_seq->u1_num_ref_frames = u4_temp;
-
-    if(ps_seq->u1_num_ref_frames > ps_dec->u4_num_ref_frames_at_init)
-    {
-        return IH264D_UNSUPPORTED_NUM_REF_FRAMES;
-    }
-
     COPYTHECONTEXT("SPS: num_ref_frames",ps_seq->u1_num_ref_frames);
 
     ps_seq->u1_gaps_in_frame_num_value_allowed_flag = ih264d_get_bit_h264(
@@ -789,49 +787,6 @@ WORD32 ih264d_parse_sps(dec_struct_t *ps_dec, dec_bit_stream_t *ps_bitstrm)
     else
         ps_seq->u1_mb_aff_flag = 0;
 
-    {
-        WORD32 frame_height_in_mbs = (2 - ps_seq->u1_frame_mbs_only_flag)
-                        * (pic_height_in_map_units_minus1 + 1);
-        UWORD32 wdth = (ps_seq->u2_frm_wd_in_mbs) << 4;
-        UWORD32 hght = (frame_height_in_mbs) << 4;
-
-        if((u2_pic_wd < H264_MIN_FRAME_WIDTH)
-                        || (u2_pic_wd > ps_dec->u4_width_at_init))
-        {
-            ivd_video_decode_op_t *ps_out;
-            /*set width and height in decode output structure*/
-            ps_out = (ivd_video_decode_op_t *)ps_dec->pv_dec_out;
-            ps_out->u4_pic_wd = u2_pic_wd;
-            ps_out->u4_pic_ht = u2_pic_ht;
-
-            return IVD_STREAM_WIDTH_HEIGHT_NOT_SUPPORTED;
-        }
-
-        if((u2_pic_ht < H264_MIN_FRAME_HEIGHT)
-                        || (((0 != ps_seq->u1_frame_mbs_only_flag)
-                                        && (u2_pic_ht * u2_pic_wd
-                                                        > ps_dec->u4_height_at_init
-                                                                        * ps_dec->u4_width_at_init))
-                                        || ((0 == ps_seq->u1_frame_mbs_only_flag)
-                                                        && (ALIGN32(u2_pic_ht)
-                                                                        * u2_pic_wd
-                                                                        > ALIGN32(ps_dec->u4_height_at_init)
-                                                                                        * ps_dec->u4_width_at_init))))
-        {
-            ivd_video_decode_op_t *ps_out;
-            /*set width and height in decode output structure*/
-            ps_out = (ivd_video_decode_op_t *)ps_dec->pv_dec_out;
-            ps_out->u4_pic_wd = u2_pic_wd;
-            ps_out->u4_pic_ht = u2_pic_ht;
-
-            return IVD_STREAM_WIDTH_HEIGHT_NOT_SUPPORTED;
-        }
-
-
-
-
-    }
-
     ps_seq->u1_direct_8x8_inference_flag = ih264d_get_bit_h264(ps_bitstrm);
 
     COPYTHECONTEXT("SPS: direct_8x8_inference_flag",
@@ -950,44 +905,6 @@ WORD32 ih264d_parse_sps(dec_struct_t *ps_dec, dec_bit_stream_t *ps_bitstrm)
             return ret;
     }
 
-    if(ps_dec->u4_level_at_init < u1_level_idc)
-    {
-        UWORD32 u4_num_pic_bufs_reqd, u4_num_reorder_frames,
-                        u4_num_mv_bufs_reqd;
-        UWORD32 u4_num_pic_bufs_memory, u4_num_mv_bufs_memory;
-        UWORD32 u4_num_ref_frames;
-
-        u4_num_ref_frames = ps_seq->u1_num_ref_frames;
-        if(1 == ps_seq->u1_vui_parameters_present_flag)
-        {
-            u4_num_reorder_frames = ps_seq->s_vui.u4_num_reorder_frames;
-        }
-        else
-        {
-            u4_num_reorder_frames = ps_dec->u4_num_reorder_frames_at_init;
-        }
-
-        u4_num_pic_bufs_reqd = u4_num_ref_frames + u4_num_reorder_frames + 1;
-
-        u4_num_pic_bufs_memory = ih264d_get_numbuf_dpb_bank(ps_dec, u2_frm_wd_y,
-                                                     u2_frm_ht_y);
-
-        u4_num_mv_bufs_reqd = u4_num_ref_frames + 1;
-
-        if(u4_num_mv_bufs_reqd < 2)
-            u4_num_mv_bufs_reqd = 2;
-
-        u4_num_mv_bufs_memory = ih264d_get_numbuf_mv_bank(ps_dec, u2_pic_wd,
-                                                   u2_pic_ht);
-
-        if((u4_num_pic_bufs_reqd > u4_num_pic_bufs_memory)
-                        || (u4_num_mv_bufs_reqd > u4_num_mv_bufs_memory))
-        {
-            return IH264D_UNSUPPORTED_LEVEL;
-        }
-
-    }
-
     ps_dec->u2_pic_wd = u2_pic_wd;
     ps_dec->u2_pic_ht = u2_pic_ht;