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comparison cdd_mcu.c @ 2348:2025ba21026a

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Fix backwards seek calculation
author Michael Pavone <pavone@retrodev.com>
date Wed, 11 Oct 2023 23:18:16 -0700
parents 047253715fd8
children c66e051de8a6
comparison
equal deleted inserted replaced
2347:047253715fd8 2348:2025ba21026a
123 } else { 123 } else {
124 context->head_pba++; 124 context->head_pba++;
125 } 125 }
126 } else { 126 } else {
127 uint32_t seek_amount; 127 uint32_t seek_amount;
128 for (seek_amount = max_seek; seek_amount >= min_seek; seek_amount >>= 1) 128 for (seek_amount = max_seek; seek_amount >= min_seek;)
129 { 129 {
130 if (context->head_pba - context->seek_pba >= seek_amount) { 130 uint32_t next_seek = seek_amount >> 1;
131 if (context->head_pba - context->seek_pba > next_seek) {
131 break; 132 break;
132 } 133 }
133 } 134 seek_amount = next_seek;
134 if (seek_amount >= min_seek) { 135 }
136 if (seek_amount >= min_seek && context->head_pba >= seek_amount) {
135 context->head_pba -= seek_amount; 137 context->head_pba -= seek_amount;
136 } else if (context->head_pba >= min_seek){ 138 } else if (context->head_pba >= min_seek){
137 context->head_pba -= min_seek; 139 context->head_pba -= min_seek;
138 } else { 140 } else {
139 context->head_pba = 0; 141 context->head_pba = 0;