repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * DCA compatible decoder data | |
| 3 | * Copyright (C) 2004 Gildas Bazin | |
| 4 | * Copyright (C) 2004 Benjamin Zores | |
| 5 | * Copyright (C) 2006 Benjamin Larsson | |
| 6 | * Copyright (C) 2007 Konstantin Shishkov | |
| 7 | * | |
| 8 | * This file is part of FFmpeg. | |
| 9 | * | |
| 10 | * FFmpeg is free software; you can redistribute it and/or | |
| 11 | * modify it under the terms of the GNU Lesser General Public | |
| 12 | * License as published by the Free Software Foundation; either | |
| 13 | * version 2.1 of the License, or (at your option) any later version. | |
| 14 | * | |
| 15 | * FFmpeg is distributed in the hope that it will be useful, | |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 18 | * Lesser General Public License for more details. | |
| 19 | * | |
| 20 | * You should have received a copy of the GNU Lesser General Public | |
| 21 | * License along with FFmpeg; if not, write to the Free Software | |
| 22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 23 | */ | |
| 24 | ||
| 25 | #include <stdint.h> | |
| 26 | #include <string.h> | |
| 27 | ||
| 28 | #include "libavutil/error.h" | |
| 29 | ||
| 30 | #include "dca.h" | |
| 31 | #include "put_bits.h" | |
| 32 | ||
| 33 | const uint32_t avpriv_dca_sample_rates[16] = | |
| 34 | { | |
| 35 | 0, 8000, 16000, 32000, 0, 0, 11025, 22050, 44100, 0, 0, | |
| 36 | 12000, 24000, 48000, 96000, 192000 | |
| 37 | }; | |
| 38 | ||
| 39 | int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst, | |
| 40 | int max_size) | |
| 41 | { | |
| 42 | uint32_t mrk; | |
| 43 | int i, tmp; | |
| 44 | const uint16_t *ssrc = (const uint16_t *) src; | |
| 45 | uint16_t *sdst = (uint16_t *) dst; | |
| 46 | PutBitContext pb; | |
| 47 | ||
| 48 | if ((unsigned) src_size > (unsigned) max_size) | |
| 49 | src_size = max_size; | |
| 50 | ||
| 51 | mrk = AV_RB32(src); | |
| 52 | switch (mrk) { | |
| 53 | case DCA_MARKER_RAW_BE: | |
| 54 | memcpy(dst, src, src_size); | |
| 55 | return src_size; | |
| 56 | case DCA_MARKER_RAW_LE: | |
| 57 | for (i = 0; i < (src_size + 1) >> 1; i++) | |
| 58 | *sdst++ = av_bswap16(*ssrc++); | |
| 59 | return src_size; | |
| 60 | case DCA_MARKER_14B_BE: | |
| 61 | case DCA_MARKER_14B_LE: | |
| 62 | init_put_bits(&pb, dst, max_size); | |
| 63 | for (i = 0; i < (src_size + 1) >> 1; i++, src += 2) { | |
| 64 | tmp = ((mrk == DCA_MARKER_14B_BE) ? AV_RB16(src) : AV_RL16(src)) & 0x3FFF; | |
| 65 | put_bits(&pb, 14, tmp); | |
| 66 | } | |
| 67 | flush_put_bits(&pb); | |
| 68 | return (put_bits_count(&pb) + 7) >> 3; | |
| 69 | default: | |
| 70 | return AVERROR_INVALIDDATA; | |
| 71 | } | |
| 72 | } |