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/* |
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* Interplay ACM decoder |
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* |
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* Copyright (c) 2004-2008 Marko Kreen |
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* Copyright (c) 2008 Adam Gashlin |
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* Copyright (c) 2015 Paul B Mahol |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include "libavutil/intreadwrite.h" |
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#define BITSTREAM_READER_LE |
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#include "avcodec.h" |
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#include "get_bits.h" |
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#include "internal.h" |
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static const int8_t map_1bit[] = { -1, +1 }; |
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static const int8_t map_2bit_near[] = { -2, -1, +1, +2 }; |
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static const int8_t map_2bit_far[] = { -3, -2, +2, +3 }; |
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static const int8_t map_3bit[] = { -4, -3, -2, -1, +1, +2, +3, +4 }; |
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static int mul_3x3 [3 * 3 * 3]; |
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static int mul_3x5 [5 * 5 * 5]; |
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static int mul_2x11[11 * 11]; |
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typedef struct InterplayACMContext { |
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GetBitContext gb; |
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uint8_t *bitstream; |
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int max_framesize; |
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int bitstream_size; |
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int bitstream_index; |
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int level; |
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int rows; |
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int cols; |
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int wrapbuf_len; |
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int block_len; |
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int skip; |
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int *block; |
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int *wrapbuf; |
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int *ampbuf; |
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int *midbuf; |
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} InterplayACMContext; |
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static av_cold int decode_init(AVCodecContext *avctx) |
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{ |
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InterplayACMContext *s = avctx->priv_data; |
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int x1, x2, x3; |
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if (avctx->extradata_size < 14) |
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return AVERROR_INVALIDDATA; |
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if (avctx->channels <= 0) { |
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av_log(avctx, AV_LOG_ERROR, "Invalid number of channels: %d\n", avctx->channels); |
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return AVERROR_INVALIDDATA; |
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} |
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s->level = AV_RL16(avctx->extradata + 12) & 0xf; |
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s->rows = AV_RL16(avctx->extradata + 12) >> 4; |
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s->cols = 1 << s->level; |
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s->wrapbuf_len = 2 * s->cols - 2; |
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s->block_len = s->rows * s->cols; |
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s->max_framesize = s->block_len; |
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s->block = av_calloc(s->block_len, sizeof(int)); |
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s->wrapbuf = av_calloc(s->wrapbuf_len, sizeof(int)); |
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s->ampbuf = av_calloc(0x10000, sizeof(int)); |
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s->bitstream = av_calloc(s->max_framesize + AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*s->bitstream) + 1, sizeof(*s->bitstream)); |
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if (!s->block || !s->wrapbuf || !s->ampbuf || !s->bitstream) |
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return AVERROR(ENOMEM); |
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s->midbuf = s->ampbuf + 0x8000; |
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avctx->sample_fmt = AV_SAMPLE_FMT_S16; |
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for (x3 = 0; x3 < 3; x3++) |
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for (x2 = 0; x2 < 3; x2++) |
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for (x1 = 0; x1 < 3; x1++) |
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mul_3x3[x1 + x2 * 3 + x3* 3 * 3] = x1 + (x2 << 4) + (x3 << 8); |
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for (x3 = 0; x3 < 5; x3++) |
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for (x2 = 0; x2 < 5; x2++) |
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for (x1 = 0; x1 < 5; x1++) |
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mul_3x5[x1 + x2 * 5 + x3 * 5 * 5] = x1 + (x2 << 4) + (x3 << 8); |
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for (x2 = 0; x2 < 11; x2++) |
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for (x1 = 0; x1 < 11; x1++) |
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mul_2x11[x1 + x2 * 11] = x1 + (x2 << 4); |
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return 0; |
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} |
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#define set_pos(s, r, c, idx) do { \ |
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unsigned pos = ((r) << s->level) + (c); \ |
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s->block[pos] = s->midbuf[(idx)]; \ |
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} while (0) |
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static int zero(InterplayACMContext *s, unsigned ind, unsigned col) |
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{ |
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unsigned i; |
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for (i = 0; i < s->rows; i++) |
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set_pos(s, i, col, 0); |
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return 0; |
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} |
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static int bad(InterplayACMContext *s, unsigned ind, unsigned col) |
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{ |
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return AVERROR_INVALIDDATA; |
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} |
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static int linear(InterplayACMContext *s, unsigned ind, unsigned col) |
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{ |
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GetBitContext *gb = &s->gb; |
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unsigned int i; |
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int b, middle = 1 << (ind - 1); |
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for (i = 0; i < s->rows; i++) { |
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b = get_bits(gb, ind); |
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set_pos(s, i, col, b - middle); |
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} |
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return 0; |
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} |
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static int k13(InterplayACMContext *s, unsigned ind, unsigned col) |
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{ |
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GetBitContext *gb = &s->gb; |
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unsigned i, b; |
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for (i = 0; i < s->rows; i++) { |
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b = get_bits1(gb); |
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if (b == 0) { |
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set_pos(s, i++, col, 0); |
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if (i >= s->rows) |
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break; |
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set_pos(s, i, col, 0); |
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continue; |
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} |
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b = get_bits1(gb); |
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if (b == 0) { |
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set_pos(s, i, col, 0); |
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continue; |
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} |
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b = get_bits1(gb); |
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set_pos(s, i, col, map_1bit[b]); |
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} |
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return 0; |
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} |
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static int k12(InterplayACMContext *s, unsigned ind, unsigned col) |
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{ |
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GetBitContext *gb = &s->gb; |
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unsigned i, b; |
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for (i = 0; i < s->rows; i++) { |
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b = get_bits1(gb); |
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if (b == 0) { |
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set_pos(s, i, col, 0); |
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continue; |
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} |
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b = get_bits1(gb); |
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set_pos(s, i, col, map_1bit[b]); |
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} |
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return 0; |
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} |
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static int k24(InterplayACMContext *s, unsigned ind, unsigned col) |
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{ |
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GetBitContext *gb = &s->gb; |
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unsigned i, b; |
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for (i = 0; i < s->rows; i++) { |
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b = get_bits1(gb); |
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if (b == 0) { |
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set_pos(s, i++, col, 0); |
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if (i >= s->rows) break; |
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set_pos(s, i, col, 0); |
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continue; |
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} |
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b = get_bits1(gb); |
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if (b == 0) { |
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set_pos(s, i, col, 0); |
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continue; |
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} |
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b = get_bits(gb, 2); |
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set_pos(s, i, col, map_2bit_near[b]); |
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} |
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return 0; |
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} |
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static int k23(InterplayACMContext *s, unsigned ind, unsigned col) |
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{ |
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GetBitContext *gb = &s->gb; |
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unsigned i, b; |
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for (i = 0; i < s->rows; i++) { |
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b = get_bits1(gb); |
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if (b == 0) { |
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set_pos(s, i, col, 0); |
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continue; |
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} |
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b = get_bits(gb, 2); |
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set_pos(s, i, col, map_2bit_near[b]); |
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} |
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return 0; |
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} |
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static int k35(InterplayACMContext *s, unsigned ind, unsigned col) |
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{ |
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GetBitContext *gb = &s->gb; |
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unsigned i, b; |
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for (i = 0; i < s->rows; i++) { |
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b = get_bits1(gb); |
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if (b == 0) { |
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set_pos(s, i++, col, 0); |
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if (i >= s->rows) |
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break; |
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set_pos(s, i, col, 0); |
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continue; |
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} |
235 |
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236 |
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b = get_bits1(gb); |
237 |
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if (b == 0) { |
238 |
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set_pos(s, i, col, 0); |
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continue; |
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} |
241 |
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242 |
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b = get_bits1(gb); |
243 |
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if (b == 0) { |
244 |
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b = get_bits1(gb); |
245 |
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set_pos(s, i, col, map_1bit[b]); |
246 |
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continue; |
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} |
248 |
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249 |
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b = get_bits(gb, 2); |
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set_pos(s, i, col, map_2bit_far[b]); |
251 |
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} |
252 |
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return 0; |
253 |
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} |
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255 |
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static int k34(InterplayACMContext *s, unsigned ind, unsigned col) |
256 |
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{ |
257 |
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GetBitContext *gb = &s->gb; |
258 |
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unsigned i, b; |
259 |
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260 |
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for (i = 0; i < s->rows; i++) { |
261 |
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b = get_bits1(gb); |
262 |
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if (b == 0) { |
263 |
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set_pos(s, i, col, 0); |
264 |
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continue; |
265 |
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} |
266 |
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267 |
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b = get_bits1(gb); |
268 |
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if (b == 0) { |
269 |
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b = get_bits1(gb); |
270 |
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set_pos(s, i, col, map_1bit[b]); |
271 |
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continue; |
272 |
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} |
273 |
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274 |
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b = get_bits(gb, 2); |
275 |
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set_pos(s, i, col, map_2bit_far[b]); |
276 |
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} |
277 |
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return 0; |
278 |
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} |
279 |
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280 |
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static int k45(InterplayACMContext *s, unsigned ind, unsigned col) |
281 |
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{ |
282 |
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GetBitContext *gb = &s->gb; |
283 |
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unsigned i, b; |
284 |
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285 |
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for (i = 0; i < s->rows; i++) { |
286 |
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b = get_bits1(gb); |
287 |
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if (b == 0) { |
288 |
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set_pos(s, i, col, 0); i++; |
289 |
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if (i >= s->rows) |
290 |
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break; |
291 |
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set_pos(s, i, col, 0); |
292 |
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continue; |
293 |
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} |
294 |
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295 |
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b = get_bits1(gb); |
296 |
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if (b == 0) { |
297 |
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set_pos(s, i, col, 0); |
298 |
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continue; |
299 |
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} |
300 |
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301 |
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b = get_bits(gb, 3); |
302 |
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set_pos(s, i, col, map_3bit[b]); |
303 |
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} |
304 |
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return 0; |
305 |
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} |
306 |
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307 |
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static int k44(InterplayACMContext *s, unsigned ind, unsigned col) |
308 |
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{ |
309 |
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GetBitContext *gb = &s->gb; |
310 |
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unsigned i, b; |
311 |
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312 |
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for (i = 0; i < s->rows; i++) { |
313 |
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b = get_bits1(gb); |
314 |
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if (b == 0) { |
315 |
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set_pos(s, i, col, 0); |
316 |
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continue; |
317 |
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} |
318 |
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319 |
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b = get_bits(gb, 3); |
320 |
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set_pos(s, i, col, map_3bit[b]); |
321 |
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} |
322 |
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return 0; |
323 |
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} |
324 |
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325 |
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static int t15(InterplayACMContext *s, unsigned ind, unsigned col) |
326 |
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{ |
327 |
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GetBitContext *gb = &s->gb; |
328 |
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unsigned i, b; |
329 |
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int n1, n2, n3; |
330 |
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331 |
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for (i = 0; i < s->rows; i++) { |
332 |
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/* b = (x1) + (x2 * 3) + (x3 * 9) */ |
333 |
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b = get_bits(gb, 5); |
334 |
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if (b > 26) { |
335 |
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av_log(NULL, AV_LOG_ERROR, "Too large b = %d > 26\n", b); |
336 |
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return AVERROR_INVALIDDATA; |
337 |
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} |
338 |
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339 |
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n1 = (mul_3x3[b] & 0x0F) - 1; |
340 |
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n2 = ((mul_3x3[b] >> 4) & 0x0F) - 1; |
341 |
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n3 = ((mul_3x3[b] >> 8) & 0x0F) - 1; |
342 |
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343 |
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set_pos(s, i++, col, n1); |
344 |
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if (i >= s->rows) |
345 |
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break; |
346 |
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set_pos(s, i++, col, n2); |
347 |
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if (i >= s->rows) |
348 |
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break; |
349 |
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set_pos(s, i, col, n3); |
350 |
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} |
351 |
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return 0; |
352 |
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} |
353 |
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|
354 |
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static int t27(InterplayACMContext *s, unsigned ind, unsigned col) |
355 |
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{ |
356 |
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GetBitContext *gb = &s->gb; |
357 |
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unsigned i, b; |
358 |
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int n1, n2, n3; |
359 |
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|
360 |
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for (i = 0; i < s->rows; i++) { |
361 |
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/* b = (x1) + (x2 * 5) + (x3 * 25) */ |
362 |
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b = get_bits(gb, 7); |
363 |
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if (b > 124) { |
364 |
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av_log(NULL, AV_LOG_ERROR, "Too large b = %d > 124\n", b); |
365 |
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return AVERROR_INVALIDDATA; |
366 |
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} |
367 |
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|
368 |
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n1 = (mul_3x5[b] & 0x0F) - 2; |
369 |
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n2 = ((mul_3x5[b] >> 4) & 0x0F) - 2; |
370 |
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n3 = ((mul_3x5[b] >> 8) & 0x0F) - 2; |
371 |
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372 |
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set_pos(s, i++, col, n1); |
373 |
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if (i >= s->rows) |
374 |
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break; |
375 |
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set_pos(s, i++, col, n2); |
376 |
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if (i >= s->rows) |
377 |
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break; |
378 |
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set_pos(s, i, col, n3); |
379 |
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} |
380 |
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return 0; |
381 |
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} |
382 |
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|
383 |
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static int t37(InterplayACMContext *s, unsigned ind, unsigned col) |
384 |
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{ |
385 |
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GetBitContext *gb = &s->gb; |
386 |
|
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unsigned i, b; |
387 |
|
|
int n1, n2; |
388 |
|
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for (i = 0; i < s->rows; i++) { |
389 |
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|
/* b = (x1) + (x2 * 11) */ |
390 |
|
|
b = get_bits(gb, 7); |
391 |
|
|
if (b > 120) { |
392 |
|
|
av_log(NULL, AV_LOG_ERROR, "Too large b = %d > 120\n", b); |
393 |
|
|
return AVERROR_INVALIDDATA; |
394 |
|
|
} |
395 |
|
|
|
396 |
|
|
n1 = (mul_2x11[b] & 0x0F) - 5; |
397 |
|
|
n2 = ((mul_2x11[b] >> 4) & 0x0F) - 5; |
398 |
|
|
|
399 |
|
|
set_pos(s, i++, col, n1); |
400 |
|
|
if (i >= s->rows) |
401 |
|
|
break; |
402 |
|
|
set_pos(s, i, col, n2); |
403 |
|
|
} |
404 |
|
|
return 0; |
405 |
|
|
} |
406 |
|
|
|
407 |
|
|
typedef int (*filler)(InterplayACMContext *s, unsigned ind, unsigned col); |
408 |
|
|
|
409 |
|
|
static const filler filler_list[] = { |
410 |
|
|
zero, bad, bad, linear, |
411 |
|
|
linear, linear, linear, linear, |
412 |
|
|
linear, linear, linear, linear, |
413 |
|
|
linear, linear, linear, linear, |
414 |
|
|
linear, k13, k12, t15, |
415 |
|
|
k24, k23, t27, k35, |
416 |
|
|
k34, bad, k45, k44, |
417 |
|
|
bad, t37, bad, bad, |
418 |
|
|
}; |
419 |
|
|
|
420 |
|
|
static int fill_block(InterplayACMContext *s) |
421 |
|
|
{ |
422 |
|
|
GetBitContext *gb = &s->gb; |
423 |
|
|
unsigned i, ind; |
424 |
|
|
int ret; |
425 |
|
|
|
426 |
|
|
for (i = 0; i < s->cols; i++) { |
427 |
|
|
ind = get_bits(gb, 5); |
428 |
|
|
ret = filler_list[ind](s, ind, i); |
429 |
|
|
if (ret < 0) |
430 |
|
|
return ret; |
431 |
|
|
} |
432 |
|
|
return 0; |
433 |
|
|
} |
434 |
|
|
|
435 |
|
|
static void juggle(int *wrap_p, int *block_p, unsigned sub_len, unsigned sub_count) |
436 |
|
|
{ |
437 |
|
|
unsigned i, j; |
438 |
|
|
int *p; |
439 |
|
|
unsigned int r0, r1, r2, r3; |
440 |
|
|
|
441 |
|
|
for (i = 0; i < sub_len; i++) { |
442 |
|
|
p = block_p; |
443 |
|
|
r0 = wrap_p[0]; |
444 |
|
|
r1 = wrap_p[1]; |
445 |
|
|
for (j = 0; j < sub_count/2; j++) { |
446 |
|
|
r2 = *p; |
447 |
|
|
*p = r1 * 2 + (r0 + r2); |
448 |
|
|
p += sub_len; |
449 |
|
|
r3 = *p; |
450 |
|
|
*p = r2 * 2 - (r1 + r3); |
451 |
|
|
p += sub_len; |
452 |
|
|
r0 = r2; |
453 |
|
|
r1 = r3; |
454 |
|
|
} |
455 |
|
|
|
456 |
|
|
*wrap_p++ = r0; |
457 |
|
|
*wrap_p++ = r1; |
458 |
|
|
block_p++; |
459 |
|
|
} |
460 |
|
|
} |
461 |
|
|
|
462 |
|
|
static void juggle_block(InterplayACMContext *s) |
463 |
|
|
{ |
464 |
|
|
unsigned sub_count, sub_len, todo_count, step_subcount, i; |
465 |
|
|
int *wrap_p, *block_p, *p; |
466 |
|
|
|
467 |
|
|
/* juggle only if subblock_len > 1 */ |
468 |
|
|
if (s->level == 0) |
469 |
|
|
return; |
470 |
|
|
|
471 |
|
|
/* 2048 / subblock_len */ |
472 |
|
|
if (s->level > 9) |
473 |
|
|
step_subcount = 1; |
474 |
|
|
else |
475 |
|
|
step_subcount = (2048 >> s->level) - 2; |
476 |
|
|
|
477 |
|
|
/* Apply juggle() (rows)x(cols) |
478 |
|
|
* from (step_subcount * 2) x (subblock_len/2) |
479 |
|
|
* to (step_subcount * subblock_len) x (1) |
480 |
|
|
*/ |
481 |
|
|
todo_count = s->rows; |
482 |
|
|
block_p = s->block; |
483 |
|
|
while (1) { |
484 |
|
|
wrap_p = s->wrapbuf; |
485 |
|
|
sub_count = step_subcount; |
486 |
|
|
if (sub_count > todo_count) |
487 |
|
|
sub_count = todo_count; |
488 |
|
|
|
489 |
|
|
sub_len = s->cols / 2; |
490 |
|
|
sub_count *= 2; |
491 |
|
|
|
492 |
|
|
juggle(wrap_p, block_p, sub_len, sub_count); |
493 |
|
|
wrap_p += sub_len * 2; |
494 |
|
|
|
495 |
|
|
for (i = 0, p = block_p; i < sub_count; i++) { |
496 |
|
|
p[0]++; |
497 |
|
|
p += sub_len; |
498 |
|
|
} |
499 |
|
|
|
500 |
|
|
while (sub_len > 1) { |
501 |
|
|
sub_len /= 2; |
502 |
|
|
sub_count *= 2; |
503 |
|
|
juggle(wrap_p, block_p, sub_len, sub_count); |
504 |
|
|
wrap_p += sub_len * 2; |
505 |
|
|
} |
506 |
|
|
|
507 |
|
|
if (todo_count <= step_subcount) |
508 |
|
|
break; |
509 |
|
|
|
510 |
|
|
todo_count -= step_subcount; |
511 |
|
|
block_p += step_subcount << s->level; |
512 |
|
|
} |
513 |
|
|
} |
514 |
|
|
|
515 |
|
|
static int decode_block(InterplayACMContext *s) |
516 |
|
|
{ |
517 |
|
|
GetBitContext *gb = &s->gb; |
518 |
|
|
int pwr, count, val, i, x, ret; |
519 |
|
|
|
520 |
|
|
pwr = get_bits(gb, 4); |
521 |
|
|
val = get_bits(gb, 16); |
522 |
|
|
|
523 |
|
|
count = 1 << pwr; |
524 |
|
|
|
525 |
|
|
for (i = 0, x = 0; i < count; i++) { |
526 |
|
|
s->midbuf[i] = x; |
527 |
|
|
x += val; |
528 |
|
|
} |
529 |
|
|
|
530 |
|
|
for (i = 1, x = -val; i <= count; i++) { |
531 |
|
|
s->midbuf[-i] = x; |
532 |
|
|
x -= (unsigned)val; |
533 |
|
|
} |
534 |
|
|
|
535 |
|
|
ret = fill_block(s); |
536 |
|
|
if (ret < 0) |
537 |
|
|
return ret; |
538 |
|
|
|
539 |
|
|
juggle_block(s); |
540 |
|
|
|
541 |
|
|
return 0; |
542 |
|
|
} |
543 |
|
|
|
544 |
|
|
static int decode_frame(AVCodecContext *avctx, void *data, |
545 |
|
|
int *got_frame_ptr, AVPacket *pkt) |
546 |
|
|
{ |
547 |
|
|
InterplayACMContext *s = avctx->priv_data; |
548 |
|
|
GetBitContext *gb = &s->gb; |
549 |
|
|
AVFrame *frame = data; |
550 |
|
|
const uint8_t *buf; |
551 |
|
|
int16_t *samples; |
552 |
|
|
int ret, n, buf_size, input_buf_size; |
553 |
|
|
|
554 |
|
|
if (!pkt->size && !s->bitstream_size) { |
555 |
|
|
*got_frame_ptr = 0; |
556 |
|
|
return 0; |
557 |
|
|
} |
558 |
|
|
|
559 |
|
|
buf_size = FFMIN(pkt->size, s->max_framesize - s->bitstream_size); |
560 |
|
|
input_buf_size = buf_size; |
561 |
|
|
if (s->bitstream_index + s->bitstream_size + buf_size > s->max_framesize) { |
562 |
|
|
memmove(s->bitstream, &s->bitstream[s->bitstream_index], s->bitstream_size); |
563 |
|
|
s->bitstream_index = 0; |
564 |
|
|
} |
565 |
|
|
if (pkt->data) |
566 |
|
|
memcpy(&s->bitstream[s->bitstream_index + s->bitstream_size], pkt->data, buf_size); |
567 |
|
|
buf = &s->bitstream[s->bitstream_index]; |
568 |
|
|
buf_size += s->bitstream_size; |
569 |
|
|
s->bitstream_size = buf_size; |
570 |
|
|
if (buf_size < s->max_framesize && pkt->data) { |
571 |
|
|
*got_frame_ptr = 0; |
572 |
|
|
return input_buf_size; |
573 |
|
|
} |
574 |
|
|
|
575 |
|
|
if ((ret = init_get_bits8(gb, buf, buf_size)) < 0) |
576 |
|
|
return ret; |
577 |
|
|
|
578 |
|
|
frame->nb_samples = s->block_len / avctx->channels; |
579 |
|
|
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
580 |
|
|
return ret; |
581 |
|
|
|
582 |
|
|
skip_bits(gb, s->skip); |
583 |
|
|
ret = decode_block(s); |
584 |
|
|
if (ret < 0) |
585 |
|
|
return ret; |
586 |
|
|
|
587 |
|
|
samples = (int16_t *)frame->data[0]; |
588 |
|
|
for (n = 0; n < frame->nb_samples * avctx->channels; n++) { |
589 |
|
|
int val = s->block[n] >> s->level; |
590 |
|
|
*samples++ = val; |
591 |
|
|
} |
592 |
|
|
|
593 |
|
|
*got_frame_ptr = 1; |
594 |
|
|
s->skip = get_bits_count(gb) - 8 * (get_bits_count(gb) / 8); |
595 |
|
|
n = get_bits_count(gb) / 8; |
596 |
|
|
|
597 |
|
|
if (n > buf_size && pkt->data) { |
598 |
|
|
s->bitstream_size = 0; |
599 |
|
|
s->bitstream_index = 0; |
600 |
|
|
return AVERROR_INVALIDDATA; |
601 |
|
|
} |
602 |
|
|
|
603 |
|
|
if (s->bitstream_size) { |
604 |
|
|
s->bitstream_index += n; |
605 |
|
|
s->bitstream_size -= n; |
606 |
|
|
return input_buf_size; |
607 |
|
|
} |
608 |
|
|
return n; |
609 |
|
|
} |
610 |
|
|
|
611 |
|
|
static av_cold int decode_close(AVCodecContext *avctx) |
612 |
|
|
{ |
613 |
|
|
InterplayACMContext *s = avctx->priv_data; |
614 |
|
|
|
615 |
|
|
av_freep(&s->block); |
616 |
|
|
av_freep(&s->wrapbuf); |
617 |
|
|
av_freep(&s->ampbuf); |
618 |
|
|
av_freep(&s->bitstream); |
619 |
|
|
s->bitstream_size = 0; |
620 |
|
|
|
621 |
|
|
return 0; |
622 |
|
|
} |
623 |
|
|
|
624 |
|
|
AVCodec ff_interplay_acm_decoder = { |
625 |
|
|
.name = "interplayacm", |
626 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("Interplay ACM"), |
627 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
628 |
|
|
.id = AV_CODEC_ID_INTERPLAY_ACM, |
629 |
|
|
.init = decode_init, |
630 |
|
|
.close = decode_close, |
631 |
|
|
.decode = decode_frame, |
632 |
|
|
.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1, |
633 |
|
|
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP, |
634 |
|
|
.priv_data_size = sizeof(InterplayACMContext), |
635 |
|
|
}; |