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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * DCA compatible decoder data |
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| 3 | * Copyright (C) 2004 Gildas Bazin |
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| 4 | * Copyright (C) 2004 Benjamin Zores |
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| 5 | * Copyright (C) 2006 Benjamin Larsson |
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| 6 | * Copyright (C) 2007 Konstantin Shishkov |
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| 7 | * |
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| 8 | * This file is part of FFmpeg. |
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| 9 | * |
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| 10 | * FFmpeg is free software; you can redistribute it and/or |
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| 11 | * modify it under the terms of the GNU Lesser General Public |
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| 12 | * License as published by the Free Software Foundation; either |
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| 13 | * version 2.1 of the License, or (at your option) any later version. |
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| 14 | * |
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| 15 | * FFmpeg is distributed in the hope that it will be useful, |
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| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | * Lesser General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU Lesser General Public |
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| 21 | * License along with FFmpeg; if not, write to the Free Software |
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| 22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 23 | */ |
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| 24 | |||
| 25 | #include |
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| 26 | #include |
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| 27 | |||
| 28 | #include "put_bits.h" |
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| 29 | #include "dca.h" |
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| 30 | |||
| 31 | const uint32_t avpriv_dca_sample_rates[16] = |
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| 32 | { |
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| 33 | 0, 8000, 16000, 32000, 0, 0, 11025, 22050, 44100, 0, 0, |
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| 34 | 12000, 24000, 48000, 96000, 192000 |
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| 35 | }; |
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| 36 | |||
| 37 | int ff_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst, |
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| 38 | int max_size) |
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| 39 | { |
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| 40 | uint32_t mrk; |
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| 41 | int i, tmp; |
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| 42 | const uint16_t *ssrc = (const uint16_t *) src; |
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| 43 | uint16_t *sdst = (uint16_t *) dst; |
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| 44 | PutBitContext pb; |
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| 45 | |||
| 46 | if ((unsigned) src_size > (unsigned) max_size) |
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| 47 | src_size = max_size; |
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| 48 | |||
| 49 | mrk = AV_RB32(src); |
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| 50 | switch (mrk) { |
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| 51 | case DCA_MARKER_RAW_BE: |
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| 52 | memcpy(dst, src, src_size); |
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| 53 | return src_size; |
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| 54 | case DCA_MARKER_RAW_LE: |
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| 55 | for (i = 0; i < (src_size + 1) >> 1; i++) |
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| 56 | *sdst++ = av_bswap16(*ssrc++); |
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| 57 | return src_size; |
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| 58 | case DCA_MARKER_14B_BE: |
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| 59 | case DCA_MARKER_14B_LE: |
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| 60 | init_put_bits(&pb, dst, max_size); |
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| 61 | for (i = 0; i < (src_size + 1) >> 1; i++, src += 2) { |
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| 62 | tmp = ((mrk == DCA_MARKER_14B_BE) ? AV_RB16(src) : AV_RL16(src)) & 0x3FFF; |
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| 63 | put_bits(&pb, 14, tmp); |
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| 64 | } |
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| 65 | flush_put_bits(&pb); |
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| 66 | return (put_bits_count(&pb) + 7) >> 3; |
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| 67 | default: |
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| 68 | return AVERROR_INVALIDDATA; |
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| 69 | } |
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| 70 | } |