| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Micronas SC-4 parser | ||
| 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 | #include "parser.h" | ||
| 22 | |||
| 23 | typedef struct MISC4Context { | ||
| 24 | ParseContext pc; | ||
| 25 | } MISC4Context; | ||
| 26 | |||
| 27 | ✗ | static int misc4_parse(AVCodecParserContext *s, AVCodecContext *avctx, | |
| 28 | const uint8_t **poutbuf, int *poutbuf_size, | ||
| 29 | const uint8_t *buf, int buf_size) | ||
| 30 | { | ||
| 31 | ✗ | MISC4Context *ctx = s->priv_data; | |
| 32 | ✗ | uint32_t state = ctx->pc.state; | |
| 33 | ✗ | int next = END_NOT_FOUND, i = 0; | |
| 34 | |||
| 35 | ✗ | *poutbuf_size = 0; | |
| 36 | ✗ | *poutbuf = NULL; | |
| 37 | |||
| 38 | ✗ | if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) { | |
| 39 | ✗ | next = buf_size; | |
| 40 | } else { | ||
| 41 | ✗ | uint32_t marker = 0; | |
| 42 | |||
| 43 | ✗ | switch (avctx->sample_rate) { | |
| 44 | ✗ | case 8000: | |
| 45 | case 11025: | ||
| 46 | ✗ | marker = 0x11b; | |
| 47 | ✗ | break; | |
| 48 | ✗ | case 16000: | |
| 49 | case 32000: | ||
| 50 | ✗ | marker = 0x2b2; | |
| 51 | ✗ | break; | |
| 52 | } | ||
| 53 | |||
| 54 | ✗ | for (; i < buf_size; i++) { | |
| 55 | ✗ | state = (state << 8) | buf[i]; | |
| 56 | ✗ | if (state == marker && i > 3) { | |
| 57 | ✗ | next = i - 3; | |
| 58 | ✗ | break; | |
| 59 | } | ||
| 60 | } | ||
| 61 | |||
| 62 | ✗ | ctx->pc.state = state; | |
| 63 | ✗ | if (ff_combine_frame(&ctx->pc, next, &buf, &buf_size) < 0) { | |
| 64 | ✗ | *poutbuf = NULL; | |
| 65 | ✗ | *poutbuf_size = 0; | |
| 66 | ✗ | return buf_size; | |
| 67 | } | ||
| 68 | } | ||
| 69 | |||
| 70 | ✗ | *poutbuf = buf; | |
| 71 | ✗ | *poutbuf_size = buf_size; | |
| 72 | |||
| 73 | ✗ | return next; | |
| 74 | } | ||
| 75 | |||
| 76 | const AVCodecParser ff_misc4_parser = { | ||
| 77 | .codec_ids = { AV_CODEC_ID_MISC4 }, | ||
| 78 | .priv_data_size = sizeof(MISC4Context), | ||
| 79 | .parser_parse = misc4_parse, | ||
| 80 | .parser_close = ff_parse_close, | ||
| 81 | }; | ||
| 82 |