| /* | |
| * DV decoder | |
| * Copyright (c) 2002 Fabrice Bellard | |
| * Copyright (c) 2004 Roman Shaposhnik | |
| * | |
| * 50 Mbps (DVCPRO50) support | |
| * Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com> | |
| * | |
| * 100 Mbps (DVCPRO HD) support | |
| * Initial code by Daniel Maas <dmaas@maasdigital.com> (funded by BBC R&D) | |
| * Final code by Roman Shaposhnik | |
| * | |
| * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth | |
| * of DV technical info. | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * FFmpeg is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| /** | |
| * @file | |
| * DV decoder | |
| */ | |
| #include "libavutil/avassert.h" | |
| #include "libavutil/emms.h" | |
| #include "libavutil/internal.h" | |
| #include "libavutil/mem_internal.h" | |
| #include "libavutil/thread.h" | |
| #include "avcodec.h" | |
| #include "codec_internal.h" | |
| #include "decode.h" | |
| #include "dv.h" | |
| #include "dv_internal.h" | |
| #include "dv_profile_internal.h" | |
| #include "dvdata.h" | |
| #include "get_bits.h" | |
| #include "idctdsp.h" | |
| #include "put_bits.h" | |
| #include "simple_idct.h" | |
| #include "thread.h" | |
| typedef struct BlockInfo { | |
| const uint32_t *factor_table; | |
| const uint8_t *scan_table; | |
| uint8_t pos; /* position in block */ | |
| void (*idct_put)(uint8_t *dest, ptrdiff_t stride, int16_t *block); | |
| uint8_t partial_bit_count; | |
| uint32_t partial_bit_buffer; | |
| int shift_offset; | |
| } BlockInfo; | |
| typedef struct DVDecContext { | |
| const AVDVProfile *sys; | |
| const AVFrame *frame; | |
| const uint8_t *buf; | |
| uint8_t dv_zigzag[2][64]; | |
| DVwork_chunk work_chunks[4 * 12 * 27]; | |
| uint32_t idct_factor[2 * 4 * 16 * 64]; | |
| void (*idct_put[2])(uint8_t *dest, ptrdiff_t stride, int16_t *block); | |
| IDCTDSPContext idsp; | |
| } DVDecContext; | |
| static const int dv_iweight_bits = 14; | |
| static const uint16_t dv_iweight_88[64] = { | |
| 32768, 16705, 16705, 17734, 17032, 17734, 18205, 18081, | |
| 18081, 18205, 18725, 18562, 19195, 18562, 18725, 19266, | |
| 19091, 19705, 19705, 19091, 19266, 21407, 19643, 20267, | |
| 20228, 20267, 19643, 21407, 22725, 21826, 20853, 20806, | |
| 20806, 20853, 21826, 22725, 23170, 23170, 21407, 21400, | |
| 21407, 23170, 23170, 24598, 23786, 22018, 22018, 23786, | |
| 24598, 25251, 24465, 22654, 24465, 25251, 25972, 25172, | |
| 25172, 25972, 26722, 27969, 26722, 29692, 29692, 31521, | |
| }; | |
| static const uint16_t dv_iweight_248[64] = { | |
| 32768, 16384, 16705, 16705, 17734, 17734, 17734, 17734, | |
| 18081, 18081, 18725, 18725, 21407, 21407, 19091, 19091, | |
| 19195, 19195, 18205, 18205, 18725, 18725, 19705, 19705, | |
| 20267, 20267, 21826, 21826, 23170, 23170, 20806, 20806, | |
| 20267, 20267, 19266, 19266, 21407, 21407, 20853, 20853, | |
| 21400, 21400, 23786, 23786, 24465, 24465, 22018, 22018, | |
| 23170, 23170, 22725, 22725, 24598, 24598, 24465, 24465, | |
| 25172, 25172, 27969, 27969, 25972, 25972, 29692, 29692 | |
| }; | |
| /** | |
| * The "inverse" DV100 weights are actually just the spec weights (zig-zagged). | |
| */ | |
| static const uint16_t dv_iweight_1080_y[64] = { | |
| 128, 16, 16, 17, 17, 17, 18, 18, | |
| 18, 18, 18, 18, 19, 18, 18, 19, | |
| 19, 19, 19, 19, 19, 42, 38, 40, | |
| 40, 40, 38, 42, 44, 43, 41, 41, | |
| 41, 41, 43, 44, 45, 45, 42, 42, | |
| 42, 45, 45, 48, 46, 43, 43, 46, | |
| 48, 49, 48, 44, 48, 49, 101, 98, | |
| 98, 101, 104, 109, 104, 116, 116, 123, | |
| }; | |
| static const uint16_t dv_iweight_1080_c[64] = { | |
| 128, 16, 16, 17, 17, 17, 25, 25, | |
| 25, 25, 26, 25, 26, 25, 26, 26, | |
| 26, 27, 27, 26, 26, 42, 38, 40, | |
| 40, 40, 38, 42, 44, 43, 41, 41, | |
| 41, 41, 43, 44, 91, 91, 84, 84, | |
| 84, 91, 91, 96, 93, 86, 86, 93, | |
| 96, 197, 191, 177, 191, 197, 203, 197, | |
| 197, 203, 209, 219, 209, 232, 232, 246, | |
| }; | |
| static const uint16_t dv_iweight_720_y[64] = { | |
| 128, 16, 16, 17, 17, 17, 18, 18, | |
| 18, 18, 18, 18, 19, 18, 18, 19, | |
| 19, 19, 19, 19, 19, 42, 38, 40, | |
| 40, 40, 38, 42, 44, 43, 41, 41, | |
| 41, 41, 43, 44, 68, 68, 63, 63, | |
| 63, 68, 68, 96, 92, 86, 86, 92, | |
| 96, 98, 96, 88, 96, 98, 202, 196, | |
| 196, 202, 208, 218, 208, 232, 232, 246, | |
| }; | |
| static const uint16_t dv_iweight_720_c[64] = { | |
| 128, 24, 24, 26, 26, 26, 36, 36, | |
| 36, 36, 36, 36, 38, 36, 36, 38, | |
| 38, 38, 38, 38, 38, 84, 76, 80, | |
| 80, 80, 76, 84, 88, 86, 82, 82, | |
| 82, 82, 86, 88, 182, 182, 168, 168, | |
| 168, 182, 182, 192, 186, 192, 172, 186, | |
| 192, 394, 382, 354, 382, 394, 406, 394, | |
| 394, 406, 418, 438, 418, 464, 464, 492, | |
| }; | |
| #define TEX_VLC_BITS 10 | |
| /* XXX: also include quantization */ | |
| static RL_VLC_ELEM dv_rl_vlc[1664]; | |
| static av_cold void dv_init_static(void) | |
| { | |
| VLCElem vlc_buf[FF_ARRAY_ELEMS(dv_rl_vlc)] = { 0 }; | |
| VLC dv_vlc = { .table = vlc_buf, .table_allocated = FF_ARRAY_ELEMS(vlc_buf) }; | |
| const unsigned offset = FF_ARRAY_ELEMS(dv_rl_vlc) - (2 * NB_DV_VLC - NB_DV_ZERO_LEVEL_ENTRIES); | |
| RL_VLC_ELEM *tmp = dv_rl_vlc + offset; | |
| int i, j; | |
| /* it's faster to include sign bit in a generic VLC parsing scheme */ | |
| for (i = 0, j = 0; i < NB_DV_VLC; i++, j++) { | |
| tmp[j].len = ff_dv_vlc_len[i]; | |
| tmp[j].run = ff_dv_vlc_run[i]; | |
| tmp[j].level = ff_dv_vlc_level[i]; | |
| if (ff_dv_vlc_level[i]) { | |
| tmp[j].len++; | |
| j++; | |
| tmp[j].len = ff_dv_vlc_len[i] + 1; | |
| tmp[j].run = ff_dv_vlc_run[i]; | |
| tmp[j].level = -ff_dv_vlc_level[i]; | |
| } | |
| } | |
| /* NOTE: as a trick, we use the fact the no codes are unused | |
| * to accelerate the parsing of partial codes */ | |
| ff_vlc_init_from_lengths(&dv_vlc, TEX_VLC_BITS, j, | |
| &tmp[0].len, sizeof(tmp[0]), | |
| NULL, 0, 0, 0, VLC_INIT_USE_STATIC, NULL); | |
| av_assert1(dv_vlc.table_size == 1664); | |
| for (int i = 0; i < dv_vlc.table_size; i++) { | |
| int code = dv_vlc.table[i].sym; | |
| int len = dv_vlc.table[i].len; | |
| int level, run; | |
| if (len < 0) { // more bits needed | |
| run = 0; | |
| level = code; | |
| } else { | |
| av_assert1(i <= code + offset); | |
| run = tmp[code].run + 1; | |
| level = tmp[code].level; | |
| } | |
| dv_rl_vlc[i].len = len; | |
| dv_rl_vlc[i].level = level; | |
| dv_rl_vlc[i].run = run; | |
| } | |
| } | |
| static void dv_init_weight_tables(DVDecContext *ctx, const AVDVProfile *d) | |
| { | |
| int j, i, c, s; | |
| uint32_t *factor1 = &ctx->idct_factor[0], | |
| *factor2 = &ctx->idct_factor[DV_PROFILE_IS_HD(d) ? 4096 : 2816]; | |
| if (DV_PROFILE_IS_HD(d)) { | |
| /* quantization quanta by QNO for DV100 */ | |
| static const uint8_t dv100_qstep[16] = { | |
| 1, /* QNO = 0 and 1 both have no quantization */ | |
| 1, | |
| 2, 3, 4, 5, 6, 7, 8, 16, 18, 20, 22, 24, 28, 52 | |
| }; | |
| const uint16_t *iweight1, *iweight2; | |
| if (d->height == 720) { | |
| iweight1 = &dv_iweight_720_y[0]; | |
| iweight2 = &dv_iweight_720_c[0]; | |
| } else { | |
| iweight1 = &dv_iweight_1080_y[0]; | |
| iweight2 = &dv_iweight_1080_c[0]; | |
| } | |
| for (c = 0; c < 4; c++) { | |
| for (s = 0; s < 16; s++) { | |
| for (i = 0; i < 64; i++) { | |
| *factor1++ = (dv100_qstep[s] << (c + 9)) * iweight1[i]; | |
| *factor2++ = (dv100_qstep[s] << (c + 9)) * iweight2[i]; | |
| } | |
| } | |
| } | |
| } else { | |
| static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 }; | |
| const uint16_t *iweight1 = &dv_iweight_88[0]; | |
| for (j = 0; j < 2; j++, iweight1 = &dv_iweight_248[0]) { | |
| for (s = 0; s < 22; s++) { | |
| for (i = c = 0; c < 4; c++) { | |
| for (; i < dv_quant_areas[c]; i++) { | |
| *factor1 = iweight1[i] << (ff_dv_quant_shifts[s][c] + 1); | |
| *factor2++ = (*factor1++) << 1; | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| static av_cold int dvvideo_decode_init(AVCodecContext *avctx) | |
| { | |
| static AVOnce init_static_once = AV_ONCE_INIT; | |
| DVDecContext *s = avctx->priv_data; | |
| int i; | |
| avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; | |
| ff_idctdsp_init(&s->idsp, avctx); | |
| for (i = 0; i < 64; i++) | |
| s->dv_zigzag[0][i] = s->idsp.idct_permutation[ff_zigzag_direct[i]]; | |
| if (avctx->lowres){ | |
| for (i = 0; i < 64; i++){ | |
| int j = ff_dv_zigzag248_direct[i]; | |
| s->dv_zigzag[1][i] = s->idsp.idct_permutation[(j & 7) + (j & 8) * 4 + (j & 48) / 2]; | |
| } | |
| }else | |
| memcpy(s->dv_zigzag[1], ff_dv_zigzag248_direct, sizeof(s->dv_zigzag[1])); | |
| s->idct_put[0] = s->idsp.idct_put; | |
| s->idct_put[1] = ff_simple_idct248_put; | |
| ff_thread_once(&init_static_once, dv_init_static); | |
| return 0; | |
| } | |
| /* decode AC coefficients */ | |
| static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, int16_t *block) | |
| { | |
| int last_index = gb->size_in_bits; | |
| const uint8_t *scan_table = mb->scan_table; | |
| const uint32_t *factor_table = mb->factor_table; | |
| int pos = mb->pos; | |
| int partial_bit_count = mb->partial_bit_count; | |
| int level, run, vlc_len, index; | |
| OPEN_READER_NOSIZE(re, gb); | |
| UPDATE_CACHE(re, gb); | |
| /* if we must parse a partial VLC, we do it here */ | |
| if (partial_bit_count > 0) { | |
| re_cache = re_cache >> partial_bit_count | | |
| mb->partial_bit_buffer; | |
| re_index -= partial_bit_count; | |
| mb->partial_bit_count = 0; | |
| } | |
| /* get the AC coefficients until last_index is reached */ | |
| for (;;) { | |
| ff_dlog(NULL, "%2d: bits=%04"PRIx32" index=%u\n", | |
| pos, SHOW_UBITS(re, gb, 16), re_index); | |
| /* our own optimized GET_RL_VLC */ | |
| index = NEG_USR32(re_cache, TEX_VLC_BITS); | |
| vlc_len = dv_rl_vlc[index].len; | |
| if (vlc_len < 0) { | |
| index = NEG_USR32((unsigned) re_cache << TEX_VLC_BITS, -vlc_len) + | |
| dv_rl_vlc[index].level; | |
| vlc_len = TEX_VLC_BITS - vlc_len; | |
| } | |
| level = dv_rl_vlc[index].level; | |
| run = dv_rl_vlc[index].run; | |
| /* gotta check if we're still within gb boundaries */ | |
| if (re_index + vlc_len > last_index) { | |
| /* should be < 16 bits otherwise a codeword could have been parsed */ | |
| mb->partial_bit_count = last_index - re_index; | |
| mb->partial_bit_buffer = re_cache & ~(-1u >> mb->partial_bit_count); | |
| re_index = last_index; | |
| break; | |
| } | |
| re_index += vlc_len; | |
| ff_dlog(NULL, "run=%d level=%d\n", run, level); | |
| pos += run; | |
| if (pos >= 64) | |
| break; | |
| level = (level * factor_table[pos] + (1 << (dv_iweight_bits - 1))) >> | |
| dv_iweight_bits; | |
| block[scan_table[pos]] = level; | |
| UPDATE_CACHE(re, gb); | |
| } | |
| CLOSE_READER(re, gb); | |
| mb->pos = pos; | |
| } | |
| static inline void bit_copy(PutBitContext *pb, GetBitContext *gb) | |
| { | |
| int bits_left = get_bits_left(gb); | |
| while (bits_left >= MIN_CACHE_BITS) { | |
| put_bits(pb, MIN_CACHE_BITS, get_bits(gb, MIN_CACHE_BITS)); | |
| bits_left -= MIN_CACHE_BITS; | |
| } | |
| if (bits_left > 0) | |
| put_bits(pb, bits_left, get_bits(gb, bits_left)); | |
| } | |
| static av_always_inline void put_block_8x4(int16_t *block, uint8_t *restrict p, int stride) | |
| { | |
| int i, j; | |
| for (i = 0; i < 4; i++) { | |
| for (j = 0; j < 8; j++) | |
| p[j] = av_clip_uint8(block[j]); | |
| block += 8; | |
| p += stride; | |
| } | |
| } | |
| static void dv100_idct_put_last_row_field_chroma(const DVDecContext *s, uint8_t *data, | |
| int stride, int16_t *blocks) | |
| { | |
| s->idsp.idct(blocks + 0*64); | |
| s->idsp.idct(blocks + 1*64); | |
| put_block_8x4(blocks+0*64, data, stride<<1); | |
| put_block_8x4(blocks+0*64 + 4*8, data + 8, stride<<1); | |
| put_block_8x4(blocks+1*64, data + stride, stride<<1); | |
| put_block_8x4(blocks+1*64 + 4*8, data + 8 + stride, stride<<1); | |
| } | |
| static void dv100_idct_put_last_row_field_luma(const DVDecContext *s, uint8_t *data, | |
| int stride, int16_t *blocks) | |
| { | |
| s->idsp.idct(blocks + 0*64); | |
| s->idsp.idct(blocks + 1*64); | |
| s->idsp.idct(blocks + 2*64); | |
| s->idsp.idct(blocks + 3*64); | |
| put_block_8x4(blocks+0*64, data, stride<<1); | |
| put_block_8x4(blocks+0*64 + 4*8, data + 16, stride<<1); | |
| put_block_8x4(blocks+1*64, data + 8, stride<<1); | |
| put_block_8x4(blocks+1*64 + 4*8, data + 24, stride<<1); | |
| put_block_8x4(blocks+2*64, data + stride, stride<<1); | |
| put_block_8x4(blocks+2*64 + 4*8, data + 16 + stride, stride<<1); | |
| put_block_8x4(blocks+3*64, data + 8 + stride, stride<<1); | |
| put_block_8x4(blocks+3*64 + 4*8, data + 24 + stride, stride<<1); | |
| } | |
| /* mb_x and mb_y are in units of 8 pixels */ | |
| static int dv_decode_video_segment(AVCodecContext *avctx, void *arg) | |
| { | |
| const DVDecContext *s = avctx->priv_data; | |
| DVwork_chunk *work_chunk = arg; | |
| int quant, dc, dct_mode, class1, j; | |
| int mb_index, mb_x, mb_y, last_index; | |
| int y_stride, linesize; | |
| int16_t *block, *block1; | |
| int c_offset; | |
| uint8_t *y_ptr; | |
| const uint8_t *buf_ptr; | |
| PutBitContext pb, vs_pb; | |
| GetBitContext gb; | |
| BlockInfo mb_data[5 * DV_MAX_BPM], *mb, *mb1; | |
| LOCAL_ALIGNED_16(int16_t, sblock, [5 * DV_MAX_BPM], [64]); | |
| LOCAL_ALIGNED_16(uint8_t, mb_bit_buffer, [80 + AV_INPUT_BUFFER_PADDING_SIZE]); /* allow some slack */ | |
| LOCAL_ALIGNED_16(uint8_t, vs_bit_buffer, [80 * 5 + AV_INPUT_BUFFER_PADDING_SIZE]); /* allow some slack */ | |
| const int log2_blocksize = 3 - avctx->lowres; | |
| int is_field_mode[5]; | |
| int vs_bit_buffer_damaged = 0; | |
| int mb_bit_buffer_damaged[5] = {0}; | |
| int retried = 0; | |
| int sta; | |
| av_assert1((((uintptr_t) mb_bit_buffer) & 7) == 0); | |
| av_assert1((((uintptr_t) vs_bit_buffer) & 7) == 0); | |
| retry: | |
| memset(sblock, 0, 5 * DV_MAX_BPM * sizeof(*sblock)); | |
| /* pass 1: read DC and AC coefficients in blocks */ | |
| buf_ptr = &s->buf[work_chunk->buf_offset * 80]; | |
| block1 = &sblock[0][0]; | |
| mb1 = mb_data; | |
| init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80); | |
| for (mb_index = 0; mb_index < 5; mb_index++, mb1 += s->sys->bpm, block1 += s->sys->bpm * 64) { | |
| /* skip header */ | |
| quant = buf_ptr[3] & 0x0f; | |
| if (avctx->error_concealment) { | |
| if ((buf_ptr[3] >> 4) == 0x0E) | |
| vs_bit_buffer_damaged = 1; | |
| if (!mb_index) { | |
| sta = buf_ptr[3] >> 4; | |
| } else if (sta != (buf_ptr[3] >> 4)) | |
| vs_bit_buffer_damaged = 1; | |
| } | |
| 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->sys, s->buf, 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); | |
| if (mb_y == 134 && is_field_mode[mb_index]) { | |
| dv100_idct_put_last_row_field_luma(s, y_ptr, s->frame->linesize[0], block); | |
| } else { | |
| 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); | |
| if (mb_y == 134 && is_field_mode[mb_index]) { | |
| dv100_idct_put_last_row_field_chroma(s, c_ptr, s->frame->linesize[j], block); | |
| mb += 2; | |
| block += 2*64; | |
| } else { | |
| 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, AVFrame *frame, | |
| int *got_frame, AVPacket *avpkt) | |
| { | |
| uint8_t *buf = avpkt->data; | |
| int buf_size = avpkt->size; | |
| DVDecContext *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->work_chunks, 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 = frame; | |
| frame->flags |= AV_FRAME_FLAG_KEY; | |
| frame->pict_type = AV_PICTURE_TYPE_I; | |
| avctx->pix_fmt = s->sys->pix_fmt; | |
| avctx->framerate = av_inv_q(s->sys->time_base); | |
| avctx->bit_rate = av_rescale_q(s->sys->frame_size, | |
| (AVRational) { 8, 1 }, | |
| 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_thread_get_buffer(avctx, frame, 0)) < 0) | |
| return ret; | |
| /* Determine the codec's field order from the packet */ | |
| if ( *vsc_pack == DV_VIDEO_CONTROL ) { | |
| if (avctx->height == 720) { | |
| frame->flags &= ~AV_FRAME_FLAG_INTERLACED; | |
| frame->flags &= ~AV_FRAME_FLAG_TOP_FIELD_FIRST; | |
| } else if (avctx->height == 1080) { | |
| frame->flags |= AV_FRAME_FLAG_INTERLACED; | |
| frame->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST * ((vsc_pack[3] & 0x40) == 0x40); | |
| } else { | |
| frame->flags |= AV_FRAME_FLAG_INTERLACED * ((vsc_pack[3] & 0x10) == 0x10); | |
| frame->flags |= AV_FRAME_FLAG_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; | |
| } | |
| const FFCodec ff_dvvideo_decoder = { | |
| .p.name = "dvvideo", | |
| CODEC_LONG_NAME("DV (Digital Video)"), | |
| .p.type = AVMEDIA_TYPE_VIDEO, | |
| .p.id = AV_CODEC_ID_DVVIDEO, | |
| .priv_data_size = sizeof(DVDecContext), | |
| .init = dvvideo_decode_init, | |
| FF_CODEC_DECODE_CB(dvvideo_decode_frame), | |
| .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS, | |
| .p.max_lowres = 3, | |
| }; |