forked from KolibriOS/kolibrios
574 lines
21 KiB
C
574 lines
21 KiB
C
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/*
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* DV decoder
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* Copyright (c) 2002 Fabrice Bellard
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* Copyright (c) 2004 Roman Shaposhnik
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*
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* 50 Mbps (DVCPRO50) support
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* Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
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*
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* 100 Mbps (DVCPRO HD) support
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* Initial code by Daniel Maas <dmaas@maasdigital.com> (funded by BBC R&D)
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* Final code by Roman Shaposhnik
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*
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* Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
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* of DV technical info.
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* DV decoder
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/internal.h"
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#include "libavutil/pixdesc.h"
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#include "avcodec.h"
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#include "dv.h"
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#include "dv_profile_internal.h"
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#include "dvdata.h"
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#include "get_bits.h"
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#include "idctdsp.h"
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#include "internal.h"
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#include "put_bits.h"
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#include "simple_idct.h"
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typedef struct BlockInfo {
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const uint32_t *factor_table;
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const uint8_t *scan_table;
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uint8_t pos; /* position in block */
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void (*idct_put)(uint8_t *dest, int line_size, int16_t *block);
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uint8_t partial_bit_count;
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uint32_t partial_bit_buffer;
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int shift_offset;
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} BlockInfo;
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static const int dv_iweight_bits = 14;
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static const uint16_t dv_iweight_88[64] = {
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32768, 16705, 16705, 17734, 17032, 17734, 18205, 18081,
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18081, 18205, 18725, 18562, 19195, 18562, 18725, 19266,
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19091, 19705, 19705, 19091, 19266, 21407, 19643, 20267,
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20228, 20267, 19643, 21407, 22725, 21826, 20853, 20806,
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20806, 20853, 21826, 22725, 23170, 23170, 21407, 21400,
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21407, 23170, 23170, 24598, 23786, 22018, 22018, 23786,
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24598, 25251, 24465, 22654, 24465, 25251, 25972, 25172,
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25172, 25972, 26722, 27969, 26722, 29692, 29692, 31521,
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};
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static const uint16_t dv_iweight_248[64] = {
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32768, 16384, 16705, 16705, 17734, 17734, 17734, 17734,
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18081, 18081, 18725, 18725, 21407, 21407, 19091, 19091,
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19195, 19195, 18205, 18205, 18725, 18725, 19705, 19705,
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20267, 20267, 21826, 21826, 23170, 23170, 20806, 20806,
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20267, 20267, 19266, 19266, 21407, 21407, 20853, 20853,
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21400, 21400, 23786, 23786, 24465, 24465, 22018, 22018,
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23170, 23170, 22725, 22725, 24598, 24598, 24465, 24465,
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25172, 25172, 27969, 27969, 25972, 25972, 29692, 29692
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};
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/**
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* The "inverse" DV100 weights are actually just the spec weights (zig-zagged).
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*/
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static const uint16_t dv_iweight_1080_y[64] = {
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128, 16, 16, 17, 17, 17, 18, 18,
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18, 18, 18, 18, 19, 18, 18, 19,
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19, 19, 19, 19, 19, 42, 38, 40,
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40, 40, 38, 42, 44, 43, 41, 41,
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41, 41, 43, 44, 45, 45, 42, 42,
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42, 45, 45, 48, 46, 43, 43, 46,
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48, 49, 48, 44, 48, 49, 101, 98,
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98, 101, 104, 109, 104, 116, 116, 123,
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};
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static const uint16_t dv_iweight_1080_c[64] = {
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128, 16, 16, 17, 17, 17, 25, 25,
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25, 25, 26, 25, 26, 25, 26, 26,
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26, 27, 27, 26, 26, 42, 38, 40,
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40, 40, 38, 42, 44, 43, 41, 41,
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41, 41, 43, 44, 91, 91, 84, 84,
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84, 91, 91, 96, 93, 86, 86, 93,
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96, 197, 191, 177, 191, 197, 203, 197,
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197, 203, 209, 219, 209, 232, 232, 246,
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};
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static const uint16_t dv_iweight_720_y[64] = {
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128, 16, 16, 17, 17, 17, 18, 18,
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18, 18, 18, 18, 19, 18, 18, 19,
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19, 19, 19, 19, 19, 42, 38, 40,
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40, 40, 38, 42, 44, 43, 41, 41,
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41, 41, 43, 44, 68, 68, 63, 63,
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63, 68, 68, 96, 92, 86, 86, 92,
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96, 98, 96, 88, 96, 98, 202, 196,
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196, 202, 208, 218, 208, 232, 232, 246,
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};
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static const uint16_t dv_iweight_720_c[64] = {
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128, 24, 24, 26, 26, 26, 36, 36,
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36, 36, 36, 36, 38, 36, 36, 38,
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38, 38, 38, 38, 38, 84, 76, 80,
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80, 80, 76, 84, 88, 86, 82, 82,
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82, 82, 86, 88, 182, 182, 168, 168,
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168, 182, 182, 192, 186, 192, 172, 186,
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192, 394, 382, 354, 382, 394, 406, 394,
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394, 406, 418, 438, 418, 464, 464, 492,
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};
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static void dv_init_weight_tables(DVVideoContext *ctx, const AVDVProfile *d)
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{
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int j, i, c, s;
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uint32_t *factor1 = &ctx->idct_factor[0],
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*factor2 = &ctx->idct_factor[DV_PROFILE_IS_HD(d) ? 4096 : 2816];
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if (DV_PROFILE_IS_HD(d)) {
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/* quantization quanta by QNO for DV100 */
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static const uint8_t dv100_qstep[16] = {
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1, /* QNO = 0 and 1 both have no quantization */
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1,
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2, 3, 4, 5, 6, 7, 8, 16, 18, 20, 22, 24, 28, 52
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};
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const uint16_t *iweight1, *iweight2;
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if (d->height == 720) {
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iweight1 = &dv_iweight_720_y[0];
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iweight2 = &dv_iweight_720_c[0];
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} else {
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iweight1 = &dv_iweight_1080_y[0];
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iweight2 = &dv_iweight_1080_c[0];
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}
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for (c = 0; c < 4; c++) {
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for (s = 0; s < 16; s++) {
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for (i = 0; i < 64; i++) {
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*factor1++ = (dv100_qstep[s] << (c + 9)) * iweight1[i];
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*factor2++ = (dv100_qstep[s] << (c + 9)) * iweight2[i];
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}
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}
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}
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} else {
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static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 };
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const uint16_t *iweight1 = &dv_iweight_88[0];
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for (j = 0; j < 2; j++, iweight1 = &dv_iweight_248[0]) {
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for (s = 0; s < 22; s++) {
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for (i = c = 0; c < 4; c++) {
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for (; i < dv_quant_areas[c]; i++) {
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*factor1 = iweight1[i] << (ff_dv_quant_shifts[s][c] + 1);
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*factor2++ = (*factor1++) << 1;
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}
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}
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}
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}
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}
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}
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static av_cold int dvvideo_decode_init(AVCodecContext *avctx)
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{
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DVVideoContext *s = avctx->priv_data;
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IDCTDSPContext idsp;
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int i;
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memset(&idsp,0, sizeof(idsp));
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ff_idctdsp_init(&idsp, avctx);
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for (i = 0; i < 64; i++)
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s->dv_zigzag[0][i] = idsp.idct_permutation[ff_zigzag_direct[i]];
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if (avctx->lowres){
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for (i = 0; i < 64; i++){
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int j = ff_dv_zigzag248_direct[i];
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s->dv_zigzag[1][i] = idsp.idct_permutation[(j & 7) + (j & 8) * 4 + (j & 48) / 2];
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}
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}else
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memcpy(s->dv_zigzag[1], ff_dv_zigzag248_direct, sizeof(s->dv_zigzag[1]));
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s->idct_put[0] = idsp.idct_put;
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s->idct_put[1] = ff_simple_idct248_put;
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return ff_dvvideo_init(avctx);
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}
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/* decode AC coefficients */
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static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, int16_t *block)
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{
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int last_index = gb->size_in_bits;
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const uint8_t *scan_table = mb->scan_table;
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const uint32_t *factor_table = mb->factor_table;
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int pos = mb->pos;
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int partial_bit_count = mb->partial_bit_count;
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int level, run, vlc_len, index;
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OPEN_READER_NOSIZE(re, gb);
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UPDATE_CACHE(re, gb);
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/* if we must parse a partial VLC, we do it here */
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if (partial_bit_count > 0) {
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re_cache = re_cache >> partial_bit_count |
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mb->partial_bit_buffer;
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re_index -= partial_bit_count;
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mb->partial_bit_count = 0;
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}
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/* get the AC coefficients until last_index is reached */
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for (;;) {
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ff_dlog(NULL, "%2d: bits=%04x index=%d\n", pos, SHOW_UBITS(re, gb, 16),
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re_index);
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/* our own optimized GET_RL_VLC */
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index = NEG_USR32(re_cache, TEX_VLC_BITS);
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vlc_len = ff_dv_rl_vlc[index].len;
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if (vlc_len < 0) {
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index = NEG_USR32((unsigned) re_cache << TEX_VLC_BITS, -vlc_len) +
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ff_dv_rl_vlc[index].level;
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vlc_len = TEX_VLC_BITS - vlc_len;
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}
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level = ff_dv_rl_vlc[index].level;
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run = ff_dv_rl_vlc[index].run;
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/* gotta check if we're still within gb boundaries */
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if (re_index + vlc_len > last_index) {
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/* should be < 16 bits otherwise a codeword could have been parsed */
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mb->partial_bit_count = last_index - re_index;
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mb->partial_bit_buffer = re_cache & ~(-1u >> mb->partial_bit_count);
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re_index = last_index;
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break;
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}
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re_index += vlc_len;
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ff_dlog(NULL, "run=%d level=%d\n", run, level);
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pos += run;
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if (pos >= 64)
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break;
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level = (level * factor_table[pos] + (1 << (dv_iweight_bits - 1))) >>
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dv_iweight_bits;
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block[scan_table[pos]] = level;
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UPDATE_CACHE(re, gb);
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}
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CLOSE_READER(re, gb);
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mb->pos = pos;
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}
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static inline void bit_copy(PutBitContext *pb, GetBitContext *gb)
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{
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int bits_left = get_bits_left(gb);
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while (bits_left >= MIN_CACHE_BITS) {
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put_bits(pb, MIN_CACHE_BITS, get_bits(gb, MIN_CACHE_BITS));
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bits_left -= MIN_CACHE_BITS;
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}
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if (bits_left > 0)
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put_bits(pb, bits_left, get_bits(gb, bits_left));
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}
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/* mb_x and mb_y are in units of 8 pixels */
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static int dv_decode_video_segment(AVCodecContext *avctx, void *arg)
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{
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DVVideoContext *s = avctx->priv_data;
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DVwork_chunk *work_chunk = arg;
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int quant, dc, dct_mode, class1, j;
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int mb_index, mb_x, mb_y, last_index;
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int y_stride, linesize;
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int16_t *block, *block1;
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int c_offset;
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uint8_t *y_ptr;
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const uint8_t *buf_ptr;
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PutBitContext pb, vs_pb;
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GetBitContext gb;
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BlockInfo mb_data[5 * DV_MAX_BPM], *mb, *mb1;
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LOCAL_ALIGNED_16(int16_t, sblock, [5 * DV_MAX_BPM], [64]);
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LOCAL_ALIGNED_16(uint8_t, mb_bit_buffer, [80 + AV_INPUT_BUFFER_PADDING_SIZE]); /* allow some slack */
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LOCAL_ALIGNED_16(uint8_t, vs_bit_buffer, [80 * 5 + AV_INPUT_BUFFER_PADDING_SIZE]); /* allow some slack */
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const int log2_blocksize = 3-s->avctx->lowres;
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int is_field_mode[5];
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int vs_bit_buffer_damaged = 0;
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int mb_bit_buffer_damaged[5] = {0};
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int retried = 0;
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int sta;
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av_assert1((((int) mb_bit_buffer) & 7) == 0);
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av_assert1((((int) vs_bit_buffer) & 7) == 0);
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retry:
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memset(sblock, 0, 5 * DV_MAX_BPM * sizeof(*sblock));
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/* pass 1: read DC and AC coefficients in blocks */
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buf_ptr = &s->buf[work_chunk->buf_offset * 80];
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block1 = &sblock[0][0];
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mb1 = mb_data;
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init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80);
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for (mb_index = 0; mb_index < 5; mb_index++, mb1 += s->sys->bpm, block1 += s->sys->bpm * 64) {
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/* skip header */
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quant = buf_ptr[3] & 0x0f;
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if (avctx->error_concealment) {
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if ((buf_ptr[3] >> 4) == 0x0E)
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vs_bit_buffer_damaged = 1;
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if (!mb_index) {
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sta = buf_ptr[3] >> 4;
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} else if (sta != (buf_ptr[3] >> 4))
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vs_bit_buffer_damaged = 1;
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}
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|
|
buf_ptr += 4;
|
||
|
|
init_put_bits(&pb, mb_bit_buffer, 80);
|
||
|
|
mb = mb1;
|
||
|
|
block = block1;
|
||
|
|
is_field_mode[mb_index] = 0;
|
||
|
|
for (j = 0; j < s->sys->bpm; j++) {
|
||
|
|
last_index = s->sys->block_sizes[j];
|
||
|
|
init_get_bits(&gb, buf_ptr, last_index);
|
||
|
|
|
||
|
|
/* get the DC */
|
||
|
|
dc = get_sbits(&gb, 9);
|
||
|
|
dct_mode = get_bits1(&gb);
|
||
|
|
class1 = get_bits(&gb, 2);
|
||
|
|
if (DV_PROFILE_IS_HD(s->sys)) {
|
||
|
|
mb->idct_put = s->idct_put[0];
|
||
|
|
mb->scan_table = s->dv_zigzag[0];
|
||
|
|
mb->factor_table = &s->idct_factor[(j >= 4) * 4 * 16 * 64 +
|
||
|
|
class1 * 16 * 64 +
|
||
|
|
quant * 64];
|
||
|
|
is_field_mode[mb_index] |= !j && dct_mode;
|
||
|
|
} else {
|
||
|
|
mb->idct_put = s->idct_put[dct_mode && log2_blocksize == 3];
|
||
|
|
mb->scan_table = s->dv_zigzag[dct_mode];
|
||
|
|
mb->factor_table =
|
||
|
|
&s->idct_factor[(class1 == 3) * 2 * 22 * 64 +
|
||
|
|
dct_mode * 22 * 64 +
|
||
|
|
(quant + ff_dv_quant_offset[class1]) * 64];
|
||
|
|
}
|
||
|
|
dc = dc * 4;
|
||
|
|
/* convert to unsigned because 128 is not added in the
|
||
|
|
* standard IDCT */
|
||
|
|
dc += 1024;
|
||
|
|
block[0] = dc;
|
||
|
|
buf_ptr += last_index >> 3;
|
||
|
|
mb->pos = 0;
|
||
|
|
mb->partial_bit_count = 0;
|
||
|
|
|
||
|
|
ff_dlog(avctx, "MB block: %d, %d ", mb_index, j);
|
||
|
|
dv_decode_ac(&gb, mb, block);
|
||
|
|
|
||
|
|
/* write the remaining bits in a new buffer only if the
|
||
|
|
* block is finished */
|
||
|
|
if (mb->pos >= 64)
|
||
|
|
bit_copy(&pb, &gb);
|
||
|
|
if (mb->pos >= 64 && mb->pos < 127)
|
||
|
|
vs_bit_buffer_damaged = mb_bit_buffer_damaged[mb_index] = 1;
|
||
|
|
|
||
|
|
block += 64;
|
||
|
|
mb++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mb_bit_buffer_damaged[mb_index] > 0)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
/* pass 2: we can do it just after */
|
||
|
|
ff_dlog(avctx, "***pass 2 size=%d MB#=%d\n", put_bits_count(&pb), mb_index);
|
||
|
|
block = block1;
|
||
|
|
mb = mb1;
|
||
|
|
init_get_bits(&gb, mb_bit_buffer, put_bits_count(&pb));
|
||
|
|
put_bits32(&pb, 0); // padding must be zeroed
|
||
|
|
flush_put_bits(&pb);
|
||
|
|
for (j = 0; j < s->sys->bpm; j++, block += 64, mb++) {
|
||
|
|
if (mb->pos < 64 && get_bits_left(&gb) > 0) {
|
||
|
|
dv_decode_ac(&gb, mb, block);
|
||
|
|
/* if still not finished, no need to parse other blocks */
|
||
|
|
if (mb->pos < 64)
|
||
|
|
break;
|
||
|
|
if (mb->pos < 127)
|
||
|
|
vs_bit_buffer_damaged = mb_bit_buffer_damaged[mb_index] = 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/* all blocks are finished, so the extra bytes can be used at
|
||
|
|
* the video segment level */
|
||
|
|
if (j >= s->sys->bpm)
|
||
|
|
bit_copy(&vs_pb, &gb);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* we need a pass over the whole video segment */
|
||
|
|
ff_dlog(avctx, "***pass 3 size=%d\n", put_bits_count(&vs_pb));
|
||
|
|
block = &sblock[0][0];
|
||
|
|
mb = mb_data;
|
||
|
|
init_get_bits(&gb, vs_bit_buffer, put_bits_count(&vs_pb));
|
||
|
|
put_bits32(&vs_pb, 0); // padding must be zeroed
|
||
|
|
flush_put_bits(&vs_pb);
|
||
|
|
for (mb_index = 0; mb_index < 5; mb_index++) {
|
||
|
|
for (j = 0; j < s->sys->bpm; j++) {
|
||
|
|
if (mb->pos < 64 && get_bits_left(&gb) > 0 && !vs_bit_buffer_damaged) {
|
||
|
|
ff_dlog(avctx, "start %d:%d\n", mb_index, j);
|
||
|
|
dv_decode_ac(&gb, mb, block);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mb->pos >= 64 && mb->pos < 127) {
|
||
|
|
av_log(avctx, AV_LOG_ERROR,
|
||
|
|
"AC EOB marker is absent pos=%d\n", mb->pos);
|
||
|
|
vs_bit_buffer_damaged = 1;
|
||
|
|
}
|
||
|
|
block += 64;
|
||
|
|
mb++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (vs_bit_buffer_damaged && !retried) {
|
||
|
|
av_log(avctx, AV_LOG_ERROR, "Concealing bitstream errors\n");
|
||
|
|
retried = 1;
|
||
|
|
goto retry;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* compute idct and place blocks */
|
||
|
|
block = &sblock[0][0];
|
||
|
|
mb = mb_data;
|
||
|
|
for (mb_index = 0; mb_index < 5; mb_index++) {
|
||
|
|
dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y);
|
||
|
|
|
||
|
|
/* idct_put'ting luminance */
|
||
|
|
if ((s->sys->pix_fmt == AV_PIX_FMT_YUV420P) ||
|
||
|
|
(s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) ||
|
||
|
|
(s->sys->height >= 720 && mb_y != 134)) {
|
||
|
|
y_stride = (s->frame->linesize[0] <<
|
||
|
|
((!is_field_mode[mb_index]) * log2_blocksize));
|
||
|
|
} else {
|
||
|
|
y_stride = (2 << log2_blocksize);
|
||
|
|
}
|
||
|
|
y_ptr = s->frame->data[0] +
|
||
|
|
((mb_y * s->frame->linesize[0] + mb_x) << log2_blocksize);
|
||
|
|
linesize = s->frame->linesize[0] << is_field_mode[mb_index];
|
||
|
|
mb[0].idct_put(y_ptr, linesize, block + 0 * 64);
|
||
|
|
if (s->sys->video_stype == 4) { /* SD 422 */
|
||
|
|
mb[2].idct_put(y_ptr + (1 << log2_blocksize), linesize, block + 2 * 64);
|
||
|
|
} else {
|
||
|
|
mb[1].idct_put(y_ptr + (1 << log2_blocksize), linesize, block + 1 * 64);
|
||
|
|
mb[2].idct_put(y_ptr + y_stride, linesize, block + 2 * 64);
|
||
|
|
mb[3].idct_put(y_ptr + (1 << log2_blocksize) + y_stride, linesize, block + 3 * 64);
|
||
|
|
}
|
||
|
|
mb += 4;
|
||
|
|
block += 4 * 64;
|
||
|
|
|
||
|
|
/* idct_put'ting chrominance */
|
||
|
|
c_offset = (((mb_y >> (s->sys->pix_fmt == AV_PIX_FMT_YUV420P)) * s->frame->linesize[1] +
|
||
|
|
(mb_x >> ((s->sys->pix_fmt == AV_PIX_FMT_YUV411P) ? 2 : 1))) << log2_blocksize);
|
||
|
|
for (j = 2; j; j--) {
|
||
|
|
uint8_t *c_ptr = s->frame->data[j] + c_offset;
|
||
|
|
if (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
|
||
|
|
uint64_t aligned_pixels[64 / 8];
|
||
|
|
uint8_t *pixels = (uint8_t *) aligned_pixels;
|
||
|
|
uint8_t *c_ptr1, *ptr1;
|
||
|
|
int x, y;
|
||
|
|
mb->idct_put(pixels, 8, block);
|
||
|
|
for (y = 0; y < (1 << log2_blocksize); y++, c_ptr += s->frame->linesize[j], pixels += 8) {
|
||
|
|
ptr1 = pixels + ((1 << (log2_blocksize))>>1);
|
||
|
|
c_ptr1 = c_ptr + (s->frame->linesize[j] << log2_blocksize);
|
||
|
|
for (x = 0; x < (1 << FFMAX(log2_blocksize - 1, 0)); x++) {
|
||
|
|
c_ptr[x] = pixels[x];
|
||
|
|
c_ptr1[x] = ptr1[x];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
block += 64;
|
||
|
|
mb++;
|
||
|
|
} else {
|
||
|
|
y_stride = (mb_y == 134) ? (1 << log2_blocksize) :
|
||
|
|
s->frame->linesize[j] << ((!is_field_mode[mb_index]) * log2_blocksize);
|
||
|
|
linesize = s->frame->linesize[j] << is_field_mode[mb_index];
|
||
|
|
(mb++)->idct_put(c_ptr, linesize, block);
|
||
|
|
block += 64;
|
||
|
|
if (s->sys->bpm == 8) {
|
||
|
|
(mb++)->idct_put(c_ptr + y_stride, linesize, block);
|
||
|
|
block += 64;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* NOTE: exactly one frame must be given (120000 bytes for NTSC,
|
||
|
|
* 144000 bytes for PAL - or twice those for 50Mbps) */
|
||
|
|
static int dvvideo_decode_frame(AVCodecContext *avctx, void *data,
|
||
|
|
int *got_frame, AVPacket *avpkt)
|
||
|
|
{
|
||
|
|
uint8_t *buf = avpkt->data;
|
||
|
|
int buf_size = avpkt->size;
|
||
|
|
DVVideoContext *s = avctx->priv_data;
|
||
|
|
const uint8_t *vsc_pack;
|
||
|
|
int apt, is16_9, ret;
|
||
|
|
const AVDVProfile *sys;
|
||
|
|
|
||
|
|
sys = ff_dv_frame_profile(avctx, s->sys, buf, buf_size);
|
||
|
|
if (!sys || buf_size < sys->frame_size) {
|
||
|
|
av_log(avctx, AV_LOG_ERROR, "could not find dv frame profile\n");
|
||
|
|
return -1; /* NOTE: we only accept several full frames */
|
||
|
|
}
|
||
|
|
|
||
|
|
if (sys != s->sys) {
|
||
|
|
ret = ff_dv_init_dynamic_tables(s, sys);
|
||
|
|
if (ret < 0) {
|
||
|
|
av_log(avctx, AV_LOG_ERROR, "Error initializing the work tables.\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
dv_init_weight_tables(s, sys);
|
||
|
|
s->sys = sys;
|
||
|
|
}
|
||
|
|
|
||
|
|
s->frame = data;
|
||
|
|
s->frame->key_frame = 1;
|
||
|
|
s->frame->pict_type = AV_PICTURE_TYPE_I;
|
||
|
|
avctx->pix_fmt = s->sys->pix_fmt;
|
||
|
|
avctx->framerate = av_inv_q(s->sys->time_base);
|
||
|
|
|
||
|
|
ret = ff_set_dimensions(avctx, s->sys->width, s->sys->height);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
/* Determine the codec's sample_aspect ratio from the packet */
|
||
|
|
vsc_pack = buf + 80 * 5 + 48 + 5;
|
||
|
|
if (*vsc_pack == dv_video_control) {
|
||
|
|
apt = buf[4] & 0x07;
|
||
|
|
is16_9 = (vsc_pack[2] & 0x07) == 0x02 ||
|
||
|
|
(!apt && (vsc_pack[2] & 0x07) == 0x07);
|
||
|
|
ff_set_sar(avctx, s->sys->sar[is16_9]);
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((ret = ff_get_buffer(avctx, s->frame, 0)) < 0)
|
||
|
|
return ret;
|
||
|
|
s->frame->interlaced_frame = 1;
|
||
|
|
s->frame->top_field_first = 0;
|
||
|
|
|
||
|
|
/* Determine the codec's field order from the packet */
|
||
|
|
if ( *vsc_pack == dv_video_control ) {
|
||
|
|
s->frame->top_field_first = !(vsc_pack[3] & 0x40);
|
||
|
|
}
|
||
|
|
|
||
|
|
s->buf = buf;
|
||
|
|
avctx->execute(avctx, dv_decode_video_segment, s->work_chunks, NULL,
|
||
|
|
dv_work_pool_size(s->sys), sizeof(DVwork_chunk));
|
||
|
|
|
||
|
|
emms_c();
|
||
|
|
|
||
|
|
/* return image */
|
||
|
|
*got_frame = 1;
|
||
|
|
|
||
|
|
return s->sys->frame_size;
|
||
|
|
}
|
||
|
|
|
||
|
|
AVCodec ff_dvvideo_decoder = {
|
||
|
|
.name = "dvvideo",
|
||
|
|
.long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
|
||
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
||
|
|
.id = AV_CODEC_ID_DVVIDEO,
|
||
|
|
.priv_data_size = sizeof(DVVideoContext),
|
||
|
|
.init = dvvideo_decode_init,
|
||
|
|
.decode = dvvideo_decode_frame,
|
||
|
|
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS,
|
||
|
|
.max_lowres = 3,
|
||
|
|
};
|