| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2012 Justin Ruggles | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | /** | ||
| 22 | * @file | ||
| 23 | * GSM audio parser | ||
| 24 | * | ||
| 25 | * Splits packets into individual blocks. | ||
| 26 | */ | ||
| 27 | |||
| 28 | #include "libavutil/avassert.h" | ||
| 29 | #include "parser.h" | ||
| 30 | #include "gsm.h" | ||
| 31 | |||
| 32 | typedef struct GSMParseContext { | ||
| 33 | ParseContext pc; | ||
| 34 | int block_size; | ||
| 35 | int duration; | ||
| 36 | int remaining; | ||
| 37 | } GSMParseContext; | ||
| 38 | |||
| 39 | 90 | static int gsm_parse(AVCodecParserContext *s1, AVCodecContext *avctx, | |
| 40 | const uint8_t **poutbuf, int *poutbuf_size, | ||
| 41 | const uint8_t *buf, int buf_size) | ||
| 42 | { | ||
| 43 | 90 | GSMParseContext *s = s1->priv_data; | |
| 44 | 90 | ParseContext *pc = &s->pc; | |
| 45 | int next; | ||
| 46 | |||
| 47 |
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90 | if (!s->block_size) { |
| 48 |
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1 | switch (avctx->codec_id) { |
| 49 | ✗ | case AV_CODEC_ID_GSM: | |
| 50 | ✗ | s->block_size = GSM_BLOCK_SIZE; | |
| 51 | ✗ | s->duration = GSM_FRAME_SIZE; | |
| 52 | ✗ | break; | |
| 53 | 1 | case AV_CODEC_ID_GSM_MS: | |
| 54 | 2 | s->block_size = avctx->block_align ? avctx->block_align | |
| 55 |
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1 | : GSM_MS_BLOCK_SIZE; |
| 56 | 1 | s->duration = GSM_FRAME_SIZE * 2; | |
| 57 | 1 | break; | |
| 58 | ✗ | default: | |
| 59 | ✗ | av_assert0(0); | |
| 60 | } | ||
| 61 | } | ||
| 62 | |||
| 63 |
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90 | if (!s->remaining) |
| 64 | 90 | s->remaining = s->block_size; | |
| 65 |
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90 | if (s->remaining <= buf_size) { |
| 66 | 89 | next = s->remaining; | |
| 67 | 89 | s->remaining = 0; | |
| 68 | } else { | ||
| 69 | 1 | next = END_NOT_FOUND; | |
| 70 | 1 | s->remaining -= buf_size; | |
| 71 | } | ||
| 72 | |||
| 73 |
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90 | if (ff_combine_frame(pc, next, &buf, &buf_size) < 0 || !buf_size) { |
| 74 | 1 | *poutbuf = NULL; | |
| 75 | 1 | *poutbuf_size = 0; | |
| 76 | 1 | return buf_size; | |
| 77 | } | ||
| 78 | |||
| 79 | 89 | s1->duration = s->duration; | |
| 80 | |||
| 81 | 89 | *poutbuf = buf; | |
| 82 | 89 | *poutbuf_size = buf_size; | |
| 83 | 89 | return next; | |
| 84 | } | ||
| 85 | |||
| 86 | const AVCodecParser ff_gsm_parser = { | ||
| 87 | .codec_ids = { AV_CODEC_ID_GSM, AV_CODEC_ID_GSM_MS }, | ||
| 88 | .priv_data_size = sizeof(GSMParseContext), | ||
| 89 | .parser_parse = gsm_parse, | ||
| 90 | .parser_close = ff_parse_close, | ||
| 91 | }; | ||
| 92 |