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annotate libtest/binreader.c @ 477:4c9222d95647

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libtwamr encoder: always emit frame->mode = mode; In the original implementation of amr_encode_frame(), the 'mode' member of the output struct was set to 0xFF if the output frame type is TX_NO_DATA. This design was made to mimic the mode field (16-bit word) being set to 0xFFFF (or -1) in 3GPP test sequence format - but nothing actually depends on this struct member being set in any way, and amr_frame_to_tseq() generates the needed 0xFFFF on its own, based on frame->type being equal to TX_NO_DATA. It is simpler and more efficient to always set frame->mode to the actual encoding mode in amr_encode_frame(), and this new behavior has already been documented in doc/AMR-library-API description in anticipation of the present change.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 18 May 2024 22:30:42 +0000
parents 820d88b97924
children
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820d88b97924 libtest: implement binary file reader
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1 /*
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2 * Here we implement our binfile_read_frame() function.
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3 */
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4
820d88b97924 libtest: implement binary file reader
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5 #include <stdio.h>
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6 #include <stdint.h>
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7 #include "binreader.h"
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8
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9 int binfile_read_frame(FILE *binf, uint8_t *frame)
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10 {
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11 int cc, morelen;
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12
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13 cc = fread(frame, 1, 1, binf);
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14 if (cc != 1)
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15 return 0;
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16 if (frame[0] == 0xBF)
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17 morelen = 1;
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18 else if ((frame[0] & 0xF0) == 0xC0)
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19 morelen = 30;
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20 else if ((frame[0] & 0xF0) == 0xD0)
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21 morelen = 32;
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22 else
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23 return -1;
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24 cc = fread(frame+1, 1, morelen, binf);
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25 if (cc == morelen)
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26 return 1;
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27 else
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28 return -2;
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29 }