X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fdv.c;h=8ba952ae62378ea415f7579f04f9593721e72325;hb=9b5fab918b79e9404a68becabc367b58bae6f847;hp=d4011902823b705bfadc71812e35fa2cf7f0d134;hpb=0c1a9edad463bd6e22b30c19b700b099c7093fc1;p=ffmpeg diff --git a/libavcodec/dv.c b/libavcodec/dv.c index d4011902823..8ba952ae623 100644 --- a/libavcodec/dv.c +++ b/libavcodec/dv.c @@ -1,145 +1,256 @@ /* * DV decoder * Copyright (c) 2002 Fabrice Bellard. + * Copyright (c) 2004 Roman Shaposhnik. * - * This library is free software; you can redistribute it and/or + * DV encoder + * Copyright (c) 2003 Roman Shaposhnik. + * + * 50 Mbps (DVCPRO50) support + * Copyright (c) 2006 Daniel Maas + * + * Many thanks to Dan Dennedy 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 of the License, or (at your option) any later version. + * version 2.1 of the License, or (at your option) any later version. * - * This library is distributed in the hope that it will be useful, + * 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 this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * 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.c + * DV codec. + */ +#define ALT_BITSTREAM_READER #include "avcodec.h" #include "dsputil.h" -#include "mpegvideo.h" +#include "bitstream.h" #include "simple_idct.h" +#include "dvdata.h" -#define NTSC_FRAME_SIZE 120000 -#define PAL_FRAME_SIZE 144000 - -#define TEX_VLC_BITS 9 +//#undef NDEBUG +//#include -typedef struct DVVideoDecodeContext { - AVCodecContext *avctx; - GetBitContext gb; - VLC *vlc; - int sampling_411; /* 0 = 420, 1 = 411 */ - int width, height; - uint8_t *current_picture[3]; /* picture structure */ +typedef struct DVVideoContext { + const DVprofile* sys; AVFrame picture; - int linesize[3]; - DCTELEM block[5*6][64] __align8; + AVCodecContext *avctx; + uint8_t *buf; + uint8_t dv_zigzag[2][64]; - uint8_t idct_permutation[64]; - /* XXX: move it to static storage ? */ - uint8_t dv_shift[2][22][64]; + uint8_t dv_idct_shift[2][2][22][64]; + + void (*get_pixels)(DCTELEM *block, const uint8_t *pixels, int line_size); + void (*fdct[2])(DCTELEM *block); void (*idct_put[2])(uint8_t *dest, int line_size, DCTELEM *block); -} DVVideoDecodeContext; +} DVVideoContext; -#include "dvdata.h" +/* MultiThreading - dv_anchor applies to entire DV codec, not just the avcontext */ +/* one element is needed for each video segment in a DV frame */ +/* at most there are 2 DIF channels * 12 DIF sequences * 27 video segments (PAL 50Mbps) */ +#define DV_ANCHOR_SIZE (2*12*27) -static VLC dv_vlc; -/* XXX: also include quantization */ -static RL_VLC_ELEM *dv_rl_vlc[1]; +static void* dv_anchor[DV_ANCHOR_SIZE]; -static void dv_build_unquantize_tables(DVVideoDecodeContext *s) +#define TEX_VLC_BITS 9 + +#ifdef DV_CODEC_TINY_TARGET +#define DV_VLC_MAP_RUN_SIZE 15 +#define DV_VLC_MAP_LEV_SIZE 23 +#else +#define DV_VLC_MAP_RUN_SIZE 64 +#define DV_VLC_MAP_LEV_SIZE 512 //FIXME sign was removed so this should be /2 but needs check +#endif + +/* XXX: also include quantization */ +static RL_VLC_ELEM dv_rl_vlc[1184]; +/* VLC encoding lookup table */ +static struct dv_vlc_pair { + uint32_t vlc; + uint8_t size; +} dv_vlc_map[DV_VLC_MAP_RUN_SIZE][DV_VLC_MAP_LEV_SIZE]; + +static void dv_build_unquantize_tables(DVVideoContext *s, uint8_t* perm) { int i, q, j; /* NOTE: max left shift is 6 */ for(q = 0; q < 22; q++) { - /* 88 unquant */ + /* 88DCT */ for(i = 1; i < 64; i++) { /* 88 table */ - j = s->idct_permutation[i]; - s->dv_shift[0][q][j] = + j = perm[i]; + s->dv_idct_shift[0][0][q][j] = dv_quant_shifts[q][dv_88_areas[i]] + 1; + s->dv_idct_shift[1][0][q][j] = s->dv_idct_shift[0][0][q][j] + 1; } - - /* 248 unquant */ + + /* 248DCT */ for(i = 1; i < 64; i++) { /* 248 table */ - s->dv_shift[1][q][i] = - dv_quant_shifts[q][dv_248_areas[i]] + 1; + s->dv_idct_shift[0][1][q][i] = + dv_quant_shifts[q][dv_248_areas[i]] + 1; + s->dv_idct_shift[1][1][q][i] = s->dv_idct_shift[0][1][q][i] + 1; } } } -static int dvvideo_decode_init(AVCodecContext *avctx) +static av_cold int dvvideo_init(AVCodecContext *avctx) { - DVVideoDecodeContext *s = avctx->priv_data; - MpegEncContext s2; - static int done; + DVVideoContext *s = avctx->priv_data; + DSPContext dsp; + static int done=0; + int i, j; if (!done) { - int i; + VLC dv_vlc; + uint16_t new_dv_vlc_bits[NB_DV_VLC*2]; + uint8_t new_dv_vlc_len[NB_DV_VLC*2]; + uint8_t new_dv_vlc_run[NB_DV_VLC*2]; + int16_t new_dv_vlc_level[NB_DV_VLC*2]; done = 1; + /* dv_anchor lets each thread know its Id */ + for (i=0; i= DV_VLC_MAP_RUN_SIZE) + continue; +#ifdef DV_CODEC_TINY_TARGET + if (dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE) + continue; +#endif - /* ugly way to get the idct & scantable */ - /* XXX: fix it */ - memset(&s2, 0, sizeof(MpegEncContext)); - s2.avctx = avctx; - dsputil_init(&s2.dsp, avctx->dsp_mask); - if (DCT_common_init(&s2) < 0) - return -1; + if (dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size != 0) + continue; - s->idct_put[0] = s2.idct_put; - memcpy(s->idct_permutation, s2.idct_permutation, 64); - memcpy(s->dv_zigzag[0], s2.intra_scantable.permutated, 64); + dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].vlc = dv_vlc_bits[i] << + (!!dv_vlc_level[i]); + dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size = dv_vlc_len[i] + + (!!dv_vlc_level[i]); + } + for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) { +#ifdef DV_CODEC_TINY_TARGET + for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) { + if (dv_vlc_map[i][j].size == 0) { + dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | + (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size)); + dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size + + dv_vlc_map[0][j].size; + } + } +#else + for (j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) { + if (dv_vlc_map[i][j].size == 0) { + dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | + (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size)); + dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size + + dv_vlc_map[0][j].size; + } + dv_vlc_map[i][((uint16_t)(-j))&0x1ff].vlc = + dv_vlc_map[i][j].vlc | 1; + dv_vlc_map[i][((uint16_t)(-j))&0x1ff].size = + dv_vlc_map[i][j].size; + } +#endif + } + } - /* XXX: use MMX also for idct248 */ - s->idct_put[1] = simple_idct248_put; - memcpy(s->dv_zigzag[1], dv_248_zigzag, 64); + /* Generic DSP setup */ + dsputil_init(&dsp, avctx); + s->get_pixels = dsp.get_pixels; + + /* 88DCT setup */ + s->fdct[0] = dsp.fdct; + s->idct_put[0] = dsp.idct_put; + for (i=0; i<64; i++) + s->dv_zigzag[0][i] = dsp.idct_permutation[ff_zigzag_direct[i]]; + + /* 248DCT setup */ + s->fdct[1] = dsp.fdct248; + s->idct_put[1] = ff_simple_idct248_put; // FIXME: need to add it to DSP + if(avctx->lowres){ + for (i=0; i<64; i++){ + int j= ff_zigzag248_direct[i]; + s->dv_zigzag[1][i] = dsp.idct_permutation[(j&7) + (j&8)*4 + (j&48)/2]; + } + }else + memcpy(s->dv_zigzag[1], ff_zigzag248_direct, 64); /* XXX: do it only for constant case */ - dv_build_unquantize_tables(s); - + dv_build_unquantize_tables(s, dsp.idct_permutation); + + avctx->coded_frame = &s->picture; + s->avctx= avctx; + return 0; } -//#define VLC_DEBUG +// #define VLC_DEBUG +// #define printf(...) av_log(NULL, AV_LOG_ERROR, __VA_ARGS__) typedef struct BlockInfo { const uint8_t *shift_table; const uint8_t *scan_table; + const int *iweight_table; uint8_t pos; /* position in block */ - uint8_t eob_reached; /* true if EOB has been reached */ uint8_t dct_mode; uint8_t partial_bit_count; uint16_t partial_bit_buffer; @@ -150,146 +261,95 @@ typedef struct BlockInfo { static const uint16_t block_sizes[6] = { 112, 112, 112, 112, 80, 80 }; +/* bit budget for AC only in 5 MBs */ +static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5; +/* see dv_88_areas and dv_248_areas for details */ +static const int mb_area_start[5] = { 1, 6, 21, 43, 64 }; -#ifndef ALT_BITSTREAM_READER -#error only works with ALT_BITSTREAM_READER -#endif +static inline int get_bits_left(GetBitContext *s) +{ + return s->size_in_bits - get_bits_count(s); +} + +static inline int put_bits_left(PutBitContext* s) +{ + return (s->buf_end - s->buf) * 8 - put_bits_count(s); +} /* decode ac coefs */ -static void dv_decode_ac(DVVideoDecodeContext *s, - BlockInfo *mb, DCTELEM *block, int last_index) +static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, DCTELEM *block) { - int last_re_index; - int shift_offset = mb->shift_offset; + int last_index = gb->size_in_bits; const uint8_t *scan_table = mb->scan_table; const uint8_t *shift_table = mb->shift_table; + const int *iweight_table = mb->iweight_table; int pos = mb->pos; - int level, pos1, sign, run; - int partial_bit_count; + int partial_bit_count = mb->partial_bit_count; + int level, pos1, run, vlc_len, index; - OPEN_READER(re, &s->gb); - -#ifdef VLC_DEBUG - printf("start\n"); -#endif + OPEN_READER(re, gb); + UPDATE_CACHE(re, gb); /* if we must parse a partial vlc, we do it here */ - partial_bit_count = mb->partial_bit_count; if (partial_bit_count > 0) { - uint8_t buf[4]; - uint32_t v; - int l, l1; - GetBitContext gb1; - - /* build the dummy bit buffer */ - l = 16 - partial_bit_count; - UPDATE_CACHE(re, &s->gb); -#ifdef VLC_DEBUG - printf("show=%04x\n", SHOW_UBITS(re, &s->gb, 16)); -#endif - v = (mb->partial_bit_buffer << l) | SHOW_UBITS(re, &s->gb, l); - buf[0] = v >> 8; - buf[1] = v; -#ifdef VLC_DEBUG - printf("v=%04x cnt=%d %04x\n", - v, partial_bit_count, (mb->partial_bit_buffer << l)); -#endif - /* try to read the codeword */ - init_get_bits(&gb1, buf, 4*8); - { - OPEN_READER(re1, &gb1); - UPDATE_CACHE(re1, &gb1); - GET_RL_VLC(level, run, re1, &gb1, dv_rl_vlc[0], - TEX_VLC_BITS, 2); - l = re1_index; - CLOSE_READER(re1, &gb1); - } -#ifdef VLC_DEBUG - printf("****run=%d level=%d size=%d\n", run, level, l); -#endif - /* compute codeword length */ - l1 = (level != 256 && level != 0); - /* if too long, we cannot parse */ - l -= partial_bit_count; - if ((re_index + l + l1) > last_index) - return; - /* skip read bits */ - last_re_index = 0; /* avoid warning */ - re_index += l; - /* by definition, if we can read the vlc, all partial bits - will be read (otherwise we could have read the vlc before) */ + re_cache = ((unsigned)re_cache >> partial_bit_count) | + (mb->partial_bit_buffer << (sizeof(re_cache)*8 - partial_bit_count)); + re_index -= partial_bit_count; mb->partial_bit_count = 0; - UPDATE_CACHE(re, &s->gb); - goto handle_vlc; } /* get the AC coefficients until last_index is reached */ for(;;) { - UPDATE_CACHE(re, &s->gb); #ifdef VLC_DEBUG - printf("%2d: bits=%04x index=%d\n", - pos, SHOW_UBITS(re, &s->gb, 16), re_index); + printf("%2d: bits=%04x index=%d\n", pos, SHOW_UBITS(re, gb, 16), re_index); #endif - last_re_index = re_index; - GET_RL_VLC(level, run, re, &s->gb, dv_rl_vlc[0], - TEX_VLC_BITS, 2); - handle_vlc: + /* 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 = NEG_USR32(re_cache, mb->partial_bit_count); + re_index = last_index; + break; + } + re_index += vlc_len; + #ifdef VLC_DEBUG printf("run=%d level=%d\n", run, level); #endif - if (level == 256) { - if (re_index > last_index) { - cannot_read: - /* put position before read code */ - re_index = last_re_index; - mb->eob_reached = 0; - break; - } - /* EOB */ - mb->eob_reached = 1; + pos += run; + if (pos >= 64) break; - } else if (level != 0) { - if ((re_index + 1) > last_index) - goto cannot_read; - sign = SHOW_SBITS(re, &s->gb, 1); - level = (level ^ sign) - sign; - LAST_SKIP_BITS(re, &s->gb, 1); - pos += run; - /* error */ - if (pos >= 64) { - goto read_error; - } - pos1 = scan_table[pos]; - level = level << (shift_table[pos1] + shift_offset); - block[pos1] = level; - // printf("run=%d level=%d shift=%d\n", run, level, shift_table[pos1]); - } else { - if (re_index > last_index) - goto cannot_read; - /* level is zero: means run without coding. No - sign is coded */ - pos += run; - /* error */ - if (pos >= 64) { - read_error: -#if defined(VLC_DEBUG) || 1 - printf("error pos=%d\n", pos); -#endif - /* for errors, we consider the eob is reached */ - mb->eob_reached = 1; - break; - } - } + + pos1 = scan_table[pos]; + level <<= shift_table[pos1]; + + /* unweigh, round, and shift down */ + level = (level*iweight_table[pos] + (1 << (dv_iweight_bits-1))) >> dv_iweight_bits; + + block[pos1] = level; + + UPDATE_CACHE(re, gb); } - CLOSE_READER(re, &s->gb); + CLOSE_READER(re, gb); mb->pos = pos; } -static inline void bit_copy(PutBitContext *pb, GetBitContext *gb, int bits_left) +static inline void bit_copy(PutBitContext *pb, GetBitContext *gb) { - while (bits_left >= 16) { - put_bits(pb, 16, get_bits(gb, 16)); - bits_left -= 16; + 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)); @@ -297,189 +357,187 @@ static inline void bit_copy(PutBitContext *pb, GetBitContext *gb, int bits_left) } /* mb_x and mb_y are in units of 8 pixels */ -static inline void dv_decode_video_segment(DVVideoDecodeContext *s, - uint8_t *buf_ptr1, +static inline void dv_decode_video_segment(DVVideoContext *s, + const uint8_t *buf_ptr1, const uint16_t *mb_pos_ptr) { int quant, dc, dct_mode, class1, j; int mb_index, mb_x, mb_y, v, last_index; DCTELEM *block, *block1; - int c_offset, bits_left; + int c_offset; uint8_t *y_ptr; - BlockInfo mb_data[5 * 6], *mb, *mb1; void (*idct_put)(uint8_t *dest, int line_size, DCTELEM *block); - uint8_t *buf_ptr; + const uint8_t *buf_ptr; PutBitContext pb, vs_pb; - uint8_t mb_bit_buffer[80 + 4]; /* allow some slack */ - int mb_bit_count; - uint8_t vs_bit_buffer[5 * 80 + 4]; /* allow some slack */ - int vs_bit_count; - - memset(s->block, 0, sizeof(s->block)); + GetBitContext gb; + BlockInfo mb_data[5 * 6], *mb, *mb1; + DECLARE_ALIGNED_16(DCTELEM, sblock[5*6][64]); + DECLARE_ALIGNED_8(uint8_t, mb_bit_buffer[80 + 4]); /* allow some slack */ + DECLARE_ALIGNED_8(uint8_t, vs_bit_buffer[5 * 80 + 4]); /* allow some slack */ + const int log2_blocksize= 3-s->avctx->lowres; + + assert((((int)mb_bit_buffer)&7)==0); + assert((((int)vs_bit_buffer)&7)==0); + + memset(sblock, 0, sizeof(sblock)); /* pass 1 : read DC and AC coefficients in blocks */ buf_ptr = buf_ptr1; - block1 = &s->block[0][0]; + block1 = &sblock[0][0]; mb1 = mb_data; - init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80, NULL, NULL); - vs_bit_count = 0; - for(mb_index = 0; mb_index < 5; mb_index++) { + init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80); + for(mb_index = 0; mb_index < 5; mb_index++, mb1 += 6, block1 += 6 * 64) { /* skip header */ quant = buf_ptr[3] & 0x0f; buf_ptr += 4; - init_put_bits(&pb, mb_bit_buffer, 80, NULL, NULL); - mb_bit_count = 0; + init_put_bits(&pb, mb_bit_buffer, 80); mb = mb1; block = block1; for(j = 0;j < 6; j++) { - /* NOTE: size is not important here */ - init_get_bits(&s->gb, buf_ptr, 14*8); - + last_index = block_sizes[j]; + init_get_bits(&gb, buf_ptr, last_index); + /* get the dc */ - dc = get_bits(&s->gb, 9); - dc = (dc << (32 - 9)) >> (32 - 9); - dct_mode = get_bits1(&s->gb); + dc = get_sbits(&gb, 9); + dct_mode = get_bits1(&gb); mb->dct_mode = dct_mode; mb->scan_table = s->dv_zigzag[dct_mode]; - class1 = get_bits(&s->gb, 2); - mb->shift_offset = (class1 == 3); - mb->shift_table = s->dv_shift[dct_mode] + mb->iweight_table = dct_mode ? dv_iweight_248 : dv_iweight_88; + class1 = get_bits(&gb, 2); + mb->shift_table = s->dv_idct_shift[class1 == 3][dct_mode] [quant + dv_quant_offset[class1]]; dc = dc << 2; /* convert to unsigned because 128 is not added in the standard IDCT */ dc += 1024; block[0] = dc; - last_index = block_sizes[j]; buf_ptr += last_index >> 3; mb->pos = 0; mb->partial_bit_count = 0; - dv_decode_ac(s, mb, block, last_index); +#ifdef VLC_DEBUG + printf("MB block: %d, %d ", mb_index, j); +#endif + dv_decode_ac(&gb, mb, block); /* write the remaining bits in a new buffer only if the block is finished */ - bits_left = last_index - s->gb.index; - if (mb->eob_reached) { - mb->partial_bit_count = 0; - mb_bit_count += bits_left; - bit_copy(&pb, &s->gb, bits_left); - } else { - /* should be < 16 bits otherwise a codeword could have - been parsed */ - mb->partial_bit_count = bits_left; - mb->partial_bit_buffer = get_bits(&s->gb, bits_left); - } + if (mb->pos >= 64) + bit_copy(&pb, &gb); + block += 64; mb++; } - - flush_put_bits(&pb); /* pass 2 : we can do it just after */ #ifdef VLC_DEBUG - printf("***pass 2 size=%d\n", mb_bit_count); + printf("***pass 2 size=%d MB#=%d\n", put_bits_count(&pb), mb_index); #endif block = block1; mb = mb1; - init_get_bits(&s->gb, mb_bit_buffer, 80*8); - for(j = 0;j < 6; j++) { - if (!mb->eob_reached && s->gb.index < mb_bit_count) { - dv_decode_ac(s, mb, block, mb_bit_count); + init_get_bits(&gb, mb_bit_buffer, put_bits_count(&pb)); + flush_put_bits(&pb); + for(j = 0;j < 6; 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->eob_reached) { - /* we could not parse the current AC coefficient, - so we add the remaining bytes */ - bits_left = mb_bit_count - s->gb.index; - if (bits_left > 0) { - mb->partial_bit_count += bits_left; - mb->partial_bit_buffer = - (mb->partial_bit_buffer << bits_left) | - get_bits(&s->gb, bits_left); - } - goto next_mb; - } + if (mb->pos < 64) + break; } - block += 64; - mb++; } /* all blocks are finished, so the extra bytes can be used at the video segment level */ - bits_left = mb_bit_count - s->gb.index; - vs_bit_count += bits_left; - bit_copy(&vs_pb, &s->gb, bits_left); - next_mb: - mb1 += 6; - block1 += 6 * 64; + if (j >= 6) + bit_copy(&vs_pb, &gb); } /* we need a pass other the whole video segment */ - flush_put_bits(&vs_pb); - #ifdef VLC_DEBUG - printf("***pass 3 size=%d\n", vs_bit_count); + printf("***pass 3 size=%d\n", put_bits_count(&vs_pb)); #endif - block = &s->block[0][0]; + block = &sblock[0][0]; mb = mb_data; - init_get_bits(&s->gb, vs_bit_buffer, 5 * 80*8); + init_get_bits(&gb, vs_bit_buffer, put_bits_count(&vs_pb)); + flush_put_bits(&vs_pb); for(mb_index = 0; mb_index < 5; mb_index++) { for(j = 0;j < 6; j++) { - if (!mb->eob_reached) { + if (mb->pos < 64) { #ifdef VLC_DEBUG printf("start %d:%d\n", mb_index, j); #endif - dv_decode_ac(s, mb, block, vs_bit_count); + dv_decode_ac(&gb, mb, block); } + if (mb->pos >= 64 && mb->pos < 127) + av_log(NULL, AV_LOG_ERROR, "AC EOB marker is absent pos=%d\n", mb->pos); block += 64; mb++; } } - + /* compute idct and place blocks */ - block = &s->block[0][0]; + block = &sblock[0][0]; mb = mb_data; for(mb_index = 0; mb_index < 5; mb_index++) { v = *mb_pos_ptr++; mb_x = v & 0xff; mb_y = v >> 8; - y_ptr = s->current_picture[0] + (mb_y * s->linesize[0] * 8) + (mb_x * 8); - if (s->sampling_411) - c_offset = (mb_y * s->linesize[1] * 8) + ((mb_x >> 2) * 8); - else - c_offset = ((mb_y >> 1) * s->linesize[1] * 8) + ((mb_x >> 1) * 8); + if (s->sys->pix_fmt == PIX_FMT_YUV422P) { + y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + (mb_x>>1))<picture.linesize[1] + (mb_x >> 2))<picture.data[0] + ((mb_y * s->picture.linesize[0] + mb_x)<sys->pix_fmt == PIX_FMT_YUV411P) + c_offset = ((mb_y * s->picture.linesize[1] + (mb_x >> 2))<> 1) * s->picture.linesize[1] + (mb_x >> 1))<idct_put[mb->dct_mode]; - if (j < 4) { - if (s->sampling_411 && mb_x < (704 / 8)) { - /* NOTE: at end of line, the macroblock is handled as 420 */ - idct_put(y_ptr + (j * 8), s->linesize[0], block); - } else { - idct_put(y_ptr + ((j & 1) * 8) + ((j >> 1) * 8 * s->linesize[0]), - s->linesize[0], block); + idct_put = s->idct_put[mb->dct_mode && log2_blocksize==3]; + if (s->sys->pix_fmt == PIX_FMT_YUV422P) { /* 4:2:2 */ + if (j == 0 || j == 2) { + /* Y0 Y1 */ + idct_put(y_ptr + ((j >> 1)<picture.linesize[0], block); + } else if(j > 3) { + /* Cr Cb */ + idct_put(s->picture.data[6 - j] + c_offset, + s->picture.linesize[6 - j], block); } - } else { - if (s->sampling_411 && mb_x >= (704 / 8)) { - uint8_t pixels[64], *c_ptr, *c_ptr1, *ptr; - int y, linesize; - /* NOTE: at end of line, the macroblock is handled as 420 */ - idct_put(pixels, 8, block); - linesize = s->linesize[6 - j]; - c_ptr = s->current_picture[6 - j] + c_offset; - ptr = pixels; - for(y = 0;y < 8; y++) { - /* convert to 411P */ - c_ptr1 = c_ptr + linesize; - c_ptr1[0] = c_ptr[0] = (ptr[0] + ptr[1]) >> 1; - c_ptr1[1] = c_ptr[1] = (ptr[2] + ptr[3]) >> 1; - c_ptr1[2] = c_ptr[2] = (ptr[4] + ptr[5]) >> 1; - c_ptr1[3] = c_ptr[3] = (ptr[6] + ptr[7]) >> 1; - c_ptr += linesize * 2; - ptr += 8; + /* note: j=1 and j=3 are "dummy" blocks in 4:2:2 */ + } else { /* 4:1:1 or 4:2:0 */ + if (j < 4) { + if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) { + /* NOTE: at end of line, the macroblock is handled as 420 */ + idct_put(y_ptr + (j<picture.linesize[0], block); + } else { + idct_put(y_ptr + (((j & 1) + (j >> 1) * s->picture.linesize[0])<picture.linesize[0], block); } } else { - /* don't ask me why they inverted Cb and Cr ! */ - idct_put(s->current_picture[6 - j] + c_offset, - s->linesize[6 - j], block); + if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) { + uint64_t aligned_pixels[64/8]; + uint8_t *pixels= (uint8_t*)aligned_pixels; + uint8_t *c_ptr, *c_ptr1, *ptr, *ptr1; + int x, y, linesize; + /* NOTE: at end of line, the macroblock is handled as 420 */ + idct_put(pixels, 8, block); + linesize = s->picture.linesize[6 - j]; + c_ptr = s->picture.data[6 - j] + c_offset; + ptr = pixels; + for(y = 0;y < (1<picture.data[6 - j] + c_offset, + s->picture.linesize[6 - j], block); + } } } block += 64; @@ -488,298 +546,712 @@ static inline void dv_decode_video_segment(DVVideoDecodeContext *s, } } +#ifdef DV_CODEC_TINY_TARGET +/* Converts run and level (where level != 0) pair into vlc, returning bit size */ +static av_always_inline int dv_rl2vlc(int run, int level, int sign, uint32_t* vlc) +{ + int size; + if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) { + *vlc = dv_vlc_map[run][level].vlc | sign; + size = dv_vlc_map[run][level].size; + } + else { + if (level < DV_VLC_MAP_LEV_SIZE) { + *vlc = dv_vlc_map[0][level].vlc | sign; + size = dv_vlc_map[0][level].size; + } else { + *vlc = 0xfe00 | (level << 1) | sign; + size = 16; + } + if (run) { + *vlc |= ((run < 16) ? dv_vlc_map[run-1][0].vlc : + (0x1f80 | (run - 1))) << size; + size += (run < 16) ? dv_vlc_map[run-1][0].size : 13; + } + } -/* NOTE: exactly one frame must be given (120000 bytes for NTSC, - 144000 bytes for PAL) */ -static int dvvideo_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) + return size; +} + +static av_always_inline int dv_rl2vlc_size(int run, int level) { - DVVideoDecodeContext *s = avctx->priv_data; - int sct, dsf, apt, ds, nb_dif_segs, vs, width, height, i, packet_size; - uint8_t *buf_ptr; - const uint16_t *mb_pos_ptr; - - /* parse id */ - init_get_bits(&s->gb, buf, buf_size*8); - sct = get_bits(&s->gb, 3); - if (sct != 0) - return -1; - skip_bits(&s->gb, 5); - get_bits(&s->gb, 4); /* dsn (sequence number */ - get_bits(&s->gb, 1); /* fsc (channel number) */ - skip_bits(&s->gb, 3); - get_bits(&s->gb, 8); /* dbn (diff block number 0-134) */ - - dsf = get_bits(&s->gb, 1); /* 0 = NTSC 1 = PAL */ - if (get_bits(&s->gb, 1) != 0) - return -1; - skip_bits(&s->gb, 11); - apt = get_bits(&s->gb, 3); /* apt */ - - get_bits(&s->gb, 1); /* tf1 */ - skip_bits(&s->gb, 4); - get_bits(&s->gb, 3); /* ap1 */ - - get_bits(&s->gb, 1); /* tf2 */ - skip_bits(&s->gb, 4); - get_bits(&s->gb, 3); /* ap2 */ - - get_bits(&s->gb, 1); /* tf3 */ - skip_bits(&s->gb, 4); - get_bits(&s->gb, 3); /* ap3 */ - - /* init size */ - width = 720; - if (dsf) { - avctx->frame_rate = 25 * FRAME_RATE_BASE; - packet_size = PAL_FRAME_SIZE; - height = 576; - nb_dif_segs = 12; - } else { - avctx->frame_rate = 30 * FRAME_RATE_BASE; - packet_size = NTSC_FRAME_SIZE; - height = 480; - nb_dif_segs = 10; + int size; + + if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) { + size = dv_vlc_map[run][level].size; } - /* NOTE: we only accept several full frames */ - if (buf_size < packet_size) - return -1; - - /* XXX: is it correct to assume that 420 is always used in PAL - mode ? */ - s->sampling_411 = !dsf; - if (s->sampling_411) { - mb_pos_ptr = dv_place_411; - avctx->pix_fmt = PIX_FMT_YUV411P; - } else { - mb_pos_ptr = dv_place_420; - avctx->pix_fmt = PIX_FMT_YUV420P; + else { + size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16; + if (run) { + size += (run < 16) ? dv_vlc_map[run-1][0].size : 13; + } } + return size; +} +#else +static av_always_inline int dv_rl2vlc(int run, int l, int sign, uint32_t* vlc) +{ + *vlc = dv_vlc_map[run][l].vlc | sign; + return dv_vlc_map[run][l].size; +} - avctx->width = width; - avctx->height = height; +static av_always_inline int dv_rl2vlc_size(int run, int l) +{ + return dv_vlc_map[run][l].size; +} +#endif - s->picture.reference= 0; - if(avctx->get_buffer(avctx, &s->picture) < 0) { - fprintf(stderr, "get_buffer() failed\n"); - return -1; +typedef struct EncBlockInfo { + int area_q[4]; + int bit_size[4]; + int prev[5]; + int cur_ac; + int cno; + int dct_mode; + DCTELEM mb[64]; + uint8_t next[64]; + uint8_t sign[64]; + uint8_t partial_bit_count; + uint32_t partial_bit_buffer; /* we can't use uint16_t here */ +} EncBlockInfo; + +static av_always_inline PutBitContext* dv_encode_ac(EncBlockInfo* bi, PutBitContext* pb_pool, + PutBitContext* pb_end) +{ + int prev; + int bits_left; + PutBitContext* pb = pb_pool; + int size = bi->partial_bit_count; + uint32_t vlc = bi->partial_bit_buffer; + + bi->partial_bit_count = bi->partial_bit_buffer = 0; + for(;;){ + /* Find suitable storage space */ + for (; size > (bits_left = put_bits_left(pb)); pb++) { + if (bits_left) { + size -= bits_left; + put_bits(pb, bits_left, vlc >> size); + vlc = vlc & ((1<= pb_end) { + bi->partial_bit_count = size; + bi->partial_bit_buffer = vlc; + return pb; + } + } + + /* Store VLC */ + put_bits(pb, size, vlc); + + if(bi->cur_ac>=64) + break; + + /* Construct the next VLC */ + prev= bi->cur_ac; + bi->cur_ac = bi->next[prev]; + if(bi->cur_ac < 64){ + size = dv_rl2vlc(bi->cur_ac - prev - 1, bi->mb[bi->cur_ac], bi->sign[bi->cur_ac], &vlc); + } else { + size = 4; vlc = 6; /* End Of Block stamp */ + } } + return pb; +} - for(i=0;i<3;i++) { - s->current_picture[i] = s->picture.data[i]; - s->linesize[i] = s->picture.linesize[i]; - if (!s->current_picture[i]) - return -1; +static av_always_inline void dv_set_class_number(DCTELEM* blk, EncBlockInfo* bi, + const uint8_t* zigzag_scan, const int *weight, int bias) +{ + int i, area; + /* We offer two different methods for class number assignment: the + method suggested in SMPTE 314M Table 22, and an improved + method. The SMPTE method is very conservative; it assigns class + 3 (i.e. severe quantization) to any block where the largest AC + component is greater than 36. ffmpeg's DV encoder tracks AC bit + consumption precisely, so there is no need to bias most blocks + towards strongly lossy compression. Instead, we assign class 2 + to most blocks, and use class 3 only when strictly necessary + (for blocks whose largest AC component exceeds 255). */ + +#if 0 /* SMPTE spec method */ + static const int classes[] = {12, 24, 36, 0xffff}; +#else /* improved ffmpeg method */ + static const int classes[] = {-1, -1, 255, 0xffff}; +#endif + int max=classes[0]; + int prev=0; + + bi->mb[0] = blk[0]; + + for (area = 0; area < 4; area++) { + bi->prev[area] = prev; + bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :) + for (i=mb_area_start[area]; i 30U) { + bi->sign[i] = (level>>31)&1; + /* weigh it and and shift down into range, adding for rounding */ + /* the extra division by a factor of 2^4 reverses the 8x expansion of the DCT + AND the 2x doubling of the weights */ + level = (FFABS(level) * weight[i] + (1<<(dv_weight_bits+3))) >> (dv_weight_bits+4); + bi->mb[i] = level; + if(level>max) max= level; + bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, level); + bi->next[prev]= i; + prev= i; + } + } } - s->width = width; - s->height = height; - - /* for each DIF segment */ - buf_ptr = buf; - for (ds = 0; ds < nb_dif_segs; ds++) { - buf_ptr += 6 * 80; /* skip DIF segment header */ - - for(vs = 0; vs < 27; vs++) { - if ((vs % 3) == 0) { - /* skip audio block */ - buf_ptr += 80; + bi->next[prev]= i; + for(bi->cno = 0; max > classes[bi->cno]; bi->cno++); + + bi->cno += bias; + + if (bi->cno >= 3) { + bi->cno = 3; + prev=0; + i= bi->next[prev]; + for (area = 0; area < 4; area++) { + bi->prev[area] = prev; + bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :) + for (; inext[i]) { + bi->mb[i] >>=1; + + if (bi->mb[i]) { + bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, bi->mb[i]); + bi->next[prev]= i; + prev= i; + } } - dv_decode_video_segment(s, buf_ptr, mb_pos_ptr); - buf_ptr += 5 * 80; - mb_pos_ptr += 5; } + bi->next[prev]= i; + } +} + +//FIXME replace this by dsputil +#define SC(x, y) ((s[x] - s[y]) ^ ((s[x] - s[y]) >> 7)) +static av_always_inline int dv_guess_dct_mode(DCTELEM *blk) { + DCTELEM *s; + int score88 = 0; + int score248 = 0; + int i; + + /* Compute 8-8 score (small values give a better chance for 8-8 DCT) */ + s = blk; + for(i=0; i<7; i++) { + score88 += SC(0, 8) + SC(1, 9) + SC(2, 10) + SC(3, 11) + + SC(4, 12) + SC(5,13) + SC(6, 14) + SC(7, 15); + s += 8; + } + /* Compute 2-4-8 score (small values give a better chance for 2-4-8 DCT) */ + s = blk; + for(i=0; i<6; i++) { + score248 += SC(0, 16) + SC(1,17) + SC(2, 18) + SC(3, 19) + + SC(4, 20) + SC(5,21) + SC(6, 22) + SC(7, 23); + s += 8; } - emms_c(); + return (score88 - score248 > -10); +} - /* return image */ - *data_size = sizeof(AVFrame); - *(AVFrame*)data= s->picture; - - avctx->release_buffer(avctx, &s->picture); - - return packet_size; +static inline void dv_guess_qnos(EncBlockInfo* blks, int* qnos) +{ + int size[5]; + int i, j, k, a, prev, a2; + EncBlockInfo* b; + + size[0] = size[1] = size[2] = size[3] = size[4] = 1<<24; + do { + b = blks; + for (i=0; i<5; i++) { + if (!qnos[i]) + continue; + + qnos[i]--; + size[i] = 0; + for (j=0; j<6; j++, b++) { + for (a=0; a<4; a++) { + if (b->area_q[a] != dv_quant_shifts[qnos[i] + dv_quant_offset[b->cno]][a]) { + b->bit_size[a] = 1; // 4 areas 4 bits for EOB :) + b->area_q[a]++; + prev= b->prev[a]; + assert(b->next[prev] >= mb_area_start[a+1] || b->mb[prev]); + for (k= b->next[prev] ; knext[k]) { + b->mb[k] >>= 1; + if (b->mb[k]) { + b->bit_size[a] += dv_rl2vlc_size(k - prev - 1, b->mb[k]); + prev= k; + } else { + if(b->next[k] >= mb_area_start[a+1] && b->next[k]<64){ + for(a2=a+1; b->next[k] >= mb_area_start[a2+1]; a2++) + b->prev[a2] = prev; + assert(a2<4); + assert(b->mb[b->next[k]]); + b->bit_size[a2] += dv_rl2vlc_size(b->next[k] - prev - 1, b->mb[b->next[k]]) + -dv_rl2vlc_size(b->next[k] - k - 1, b->mb[b->next[k]]); + assert(b->prev[a2]==k && (a2+1 >= 4 || b->prev[a2+1]!=k)); + b->prev[a2] = prev; + } + b->next[prev] = b->next[k]; + } + } + b->prev[a+1]= prev; + } + size[i] += b->bit_size[a]; + } + } + if(vs_total_ac_bits >= size[0] + size[1] + size[2] + size[3] + size[4]) + return; + } + } while (qnos[0]|qnos[1]|qnos[2]|qnos[3]|qnos[4]); + + + for(a=2; a==2 || vs_total_ac_bits < size[0]; a+=a){ + b = blks; + size[0] = 5*6*4; //EOB + for (j=0; j<6*5; j++, b++) { + prev= b->prev[0]; + for (k= b->next[prev]; k<64; k= b->next[k]) { + if(b->mb[k] < a && b->mb[k] > -a){ + b->next[prev] = b->next[k]; + }else{ + size[0] += dv_rl2vlc_size(k - prev - 1, b->mb[k]); + prev= k; + } + } + } + } } -static int dvvideo_decode_end(AVCodecContext *avctx) +static inline void dv_encode_video_segment(DVVideoContext *s, + uint8_t *dif, + const uint16_t *mb_pos_ptr) { - DVVideoDecodeContext *s = avctx->priv_data; - int i; - - if(avctx->get_buffer == avcodec_default_get_buffer){ - for(i=0; i<4; i++){ - av_freep(&s->picture.base[i]); - s->picture.data[i]= NULL; + int mb_index, i, j, v; + int mb_x, mb_y, c_offset, linesize; + uint8_t* y_ptr; + uint8_t* data; + uint8_t* ptr; + int do_edge_wrap; + DECLARE_ALIGNED_16(DCTELEM, block[64]); + EncBlockInfo enc_blks[5*6]; + PutBitContext pbs[5*6]; + PutBitContext* pb; + EncBlockInfo* enc_blk; + int vs_bit_size = 0; + int qnos[5]; + + assert((((int)block) & 15) == 0); + + enc_blk = &enc_blks[0]; + pb = &pbs[0]; + for(mb_index = 0; mb_index < 5; mb_index++) { + v = *mb_pos_ptr++; + mb_x = v & 0xff; + mb_y = v >> 8; + if (s->sys->pix_fmt == PIX_FMT_YUV422P) { + y_ptr = s->picture.data[0] + (mb_y * s->picture.linesize[0] * 8) + (mb_x * 4); + } else { /* 4:1:1 */ + y_ptr = s->picture.data[0] + (mb_y * s->picture.linesize[0] * 8) + (mb_x * 8); + } + if (s->sys->pix_fmt == PIX_FMT_YUV420P) { + c_offset = (((mb_y >> 1) * s->picture.linesize[1] * 8) + ((mb_x >> 1) * 8)); + } else { /* 4:2:2 or 4:1:1 */ + c_offset = ((mb_y * s->picture.linesize[1] * 8) + ((mb_x >> 2) * 8)); + } + do_edge_wrap = 0; + qnos[mb_index] = 15; /* No quantization */ + ptr = dif + mb_index*80 + 4; + for(j = 0;j < 6; j++) { + int dummy = 0; + if (s->sys->pix_fmt == PIX_FMT_YUV422P) { /* 4:2:2 */ + if (j == 0 || j == 2) { + /* Y0 Y1 */ + data = y_ptr + ((j>>1) * 8); + linesize = s->picture.linesize[0]; + } else if (j > 3) { + /* Cr Cb */ + data = s->picture.data[6 - j] + c_offset; + linesize = s->picture.linesize[6 - j]; + } else { + /* j=1 and j=3 are "dummy" blocks, used for AC data only */ + data = 0; + linesize = 0; + dummy = 1; + } + } else { /* 4:1:1 or 4:2:0 */ + if (j < 4) { /* Four Y blocks */ + /* NOTE: at end of line, the macroblock is handled as 420 */ + if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) { + data = y_ptr + (j * 8); + } else { + data = y_ptr + ((j & 1) * 8) + ((j >> 1) * 8 * s->picture.linesize[0]); + } + linesize = s->picture.linesize[0]; + } else { /* Cr and Cb blocks */ + /* don't ask Fabrice why they inverted Cb and Cr ! */ + data = s->picture.data[6 - j] + c_offset; + linesize = s->picture.linesize[6 - j]; + if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) + do_edge_wrap = 1; + } + } + + /* Everything is set up -- now just copy data -> DCT block */ + if (do_edge_wrap) { /* Edge wrap copy: 4x16 -> 8x8 */ + uint8_t* d; + DCTELEM *b = block; + for (i=0;i<8;i++) { + d = data + 8 * linesize; + b[0] = data[0]; b[1] = data[1]; b[2] = data[2]; b[3] = data[3]; + b[4] = d[0]; b[5] = d[1]; b[6] = d[2]; b[7] = d[3]; + data += linesize; + b += 8; + } + } else { /* Simple copy: 8x8 -> 8x8 */ + if (!dummy) + s->get_pixels(block, data, linesize); + } + + if(s->avctx->flags & CODEC_FLAG_INTERLACED_DCT) + enc_blk->dct_mode = dv_guess_dct_mode(block); + else + enc_blk->dct_mode = 0; + enc_blk->area_q[0] = enc_blk->area_q[1] = enc_blk->area_q[2] = enc_blk->area_q[3] = 0; + enc_blk->partial_bit_count = 0; + enc_blk->partial_bit_buffer = 0; + enc_blk->cur_ac = 0; + + if (dummy) { + /* We rely on the fact that encoding all zeros leads to an immediate EOB, + which is precisely what the spec calls for in the "dummy" blocks. */ + memset(block, 0, sizeof(block)); + } else { + s->fdct[enc_blk->dct_mode](block); + } + + dv_set_class_number(block, enc_blk, + enc_blk->dct_mode ? ff_zigzag248_direct : ff_zigzag_direct, + enc_blk->dct_mode ? dv_weight_248 : dv_weight_88, + j/4); + + init_put_bits(pb, ptr, block_sizes[j]/8); + put_bits(pb, 9, (uint16_t)(((enc_blk->mb[0] >> 3) - 1024 + 2) >> 2)); + put_bits(pb, 1, enc_blk->dct_mode); + put_bits(pb, 2, enc_blk->cno); + + vs_bit_size += enc_blk->bit_size[0] + enc_blk->bit_size[1] + + enc_blk->bit_size[2] + enc_blk->bit_size[3]; + ++enc_blk; + ++pb; + ptr += block_sizes[j]/8; } - av_freep(&s->picture.opaque); } - return 0; -} + if (vs_total_ac_bits < vs_bit_size) + dv_guess_qnos(&enc_blks[0], &qnos[0]); -AVCodec dvvideo_decoder = { - "dvvideo", - CODEC_TYPE_VIDEO, - CODEC_ID_DVVIDEO, - sizeof(DVVideoDecodeContext), - dvvideo_decode_init, - NULL, - dvvideo_decode_end, - dvvideo_decode_frame, - CODEC_CAP_DR1, - NULL -}; + for (i=0; i<5; i++) { + dif[i*80 + 3] = qnos[i]; + } -typedef struct DVAudioDecodeContext { - AVCodecContext *avctx; - GetBitContext gb; -} DVAudioDecodeContext; + /* First pass over individual cells only */ + for (j=0; j<5*6; j++) + dv_encode_ac(&enc_blks[j], &pbs[j], &pbs[j+1]); -static int dvaudio_decode_init(AVCodecContext *avctx) + /* Second pass over each MB space */ + for (j=0; j<5*6; j+=6) { + pb= &pbs[j]; + for (i=0; i<6; i++) { + if (enc_blks[i+j].partial_bit_count) + pb=dv_encode_ac(&enc_blks[i+j], pb, &pbs[j+6]); + } + } + + /* Third and final pass over the whole vides segment space */ + pb= &pbs[0]; + for (j=0; j<5*6; j++) { + if (enc_blks[j].partial_bit_count) + pb=dv_encode_ac(&enc_blks[j], pb, &pbs[6*5]); + if (enc_blks[j].partial_bit_count) + av_log(NULL, AV_LOG_ERROR, "ac bitstream overflow\n"); + } + + for (j=0; j<5*6; j++) + flush_put_bits(&pbs[j]); +} + +static int dv_decode_mt(AVCodecContext *avctx, void* sl) { - // DVAudioDecodeContext *s = avctx->priv_data; + DVVideoContext *s = avctx->priv_data; + int slice = (size_t)sl; + + /* which DIF channel is this? */ + int chan = slice / (s->sys->difseg_size * 27); + + /* slice within the DIF channel */ + int chan_slice = slice % (s->sys->difseg_size * 27); + + /* byte offset of this channel's data */ + int chan_offset = chan * s->sys->difseg_size * 150 * 80; + + dv_decode_video_segment(s, &s->buf[((chan_slice/27)*6+(chan_slice/3)+chan_slice*5+7)*80 + chan_offset], + &s->sys->video_place[slice*5]); return 0; } -static uint16_t dv_audio_12to16(uint16_t sample) +#ifdef CONFIG_DVVIDEO_ENCODER +static int dv_encode_mt(AVCodecContext *avctx, void* sl) { - uint16_t shift, result; - - sample = (sample < 0x800) ? sample : sample | 0xf000; - shift = (sample & 0xf00) >> 8; - - if (shift < 0x2 || shift > 0xd) { - result = sample; - } else if (shift < 0x8) { - shift--; - result = (sample - (256 * shift)) << shift; - } else { - shift = 0xe - shift; - result = ((sample + ((256 * shift) + 1)) << shift) - 1; - } + DVVideoContext *s = avctx->priv_data; + int slice = (size_t)sl; + + /* which DIF channel is this? */ + int chan = slice / (s->sys->difseg_size * 27); + + /* slice within the DIF channel */ + int chan_slice = slice % (s->sys->difseg_size * 27); + + /* byte offset of this channel's data */ + int chan_offset = chan * s->sys->difseg_size * 150 * 80; - return result; + dv_encode_video_segment(s, &s->buf[((chan_slice/27)*6+(chan_slice/3)+chan_slice*5+7)*80 + chan_offset], + &s->sys->video_place[slice*5]); + return 0; } +#endif +#ifdef CONFIG_DECODERS /* NOTE: exactly one frame must be given (120000 bytes for NTSC, - 144000 bytes for PAL) - - There's a couple of assumptions being made here: - 1. We don't do any kind of audio error correction. It means, - that erroneous samples 0x8000 are being passed upwards. - Do we need to silence erroneous samples ? Average them ? - 2. We don't do software emphasis. - 3. We are not checking for 'speed' argument being valid. - 4. Audio is always returned as 16bit linear samples: 12bit - nonlinear samples are converted into 16bit linear ones. -*/ -static int dvaudio_decode_frame(AVCodecContext *avctx, + 144000 bytes for PAL - or twice those for 50Mbps) */ +static int dvvideo_decode_frame(AVCodecContext *avctx, void *data, int *data_size, - uint8_t *buf, int buf_size) + const uint8_t *buf, int buf_size) { - DVVideoDecodeContext *s = avctx->priv_data; - const uint16_t (*unshuffle)[9]; - int smpls, freq, quant, sys, stride, difseg, ad, dp, nb_dif_segs, i; - uint16_t lc, rc; - uint8_t *buf_ptr; - - /* parse id */ - init_get_bits(&s->gb, &buf[AAUX_OFFSET], 5*8); - i = get_bits(&s->gb, 8); - if (i != 0x50) { /* No audio ? */ - *data_size = 0; - return buf_size; + DVVideoContext *s = avctx->priv_data; + + s->sys = dv_frame_profile(buf); + if (!s->sys || buf_size < s->sys->frame_size) + return -1; /* NOTE: we only accept several full frames */ + + if(s->picture.data[0]) + avctx->release_buffer(avctx, &s->picture); + + s->picture.reference = 0; + s->picture.key_frame = 1; + s->picture.pict_type = FF_I_TYPE; + avctx->pix_fmt = s->sys->pix_fmt; + avctx->time_base = (AVRational){s->sys->frame_rate_base, s->sys->frame_rate}; + avcodec_set_dimensions(avctx, s->sys->width, s->sys->height); + if(avctx->get_buffer(avctx, &s->picture) < 0) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return -1; } - - get_bits(&s->gb, 1); /* 0 - locked audio, 1 - unlocked audio */ - skip_bits(&s->gb, 1); - smpls = get_bits(&s->gb, 6); /* samples in this frame - min. samples */ - - skip_bits(&s->gb, 8); - - skip_bits(&s->gb, 2); - sys = get_bits(&s->gb, 1); /* 0 - 60 fields, 1 = 50 fields */ - skip_bits(&s->gb, 5); - - get_bits(&s->gb, 1); /* 0 - emphasis on, 1 - emphasis off */ - get_bits(&s->gb, 1); /* 0 - reserved, 1 - emphasis time constant 50/15us */ - freq = get_bits(&s->gb, 3); /* 0 - 48KHz, 1 - 44,1kHz, 2 - 32 kHz */ - quant = get_bits(&s->gb, 3); /* 0 - 16bit linear, 1 - 12bit nonlinear */ - - if (quant > 1) - return -1; /* Unsupported quantization */ - - avctx->sample_rate = dv_audio_frequency[freq]; - // What about: - // avctx->bit_rate = - // avctx->frame_size = - - *data_size = (dv_audio_min_samples[sys][freq] + smpls) * - avctx->channels * 2; - - if (sys) { - nb_dif_segs = 12; - stride = 108; - unshuffle = dv_place_audio50; - } else { - nb_dif_segs = 10; - stride = 90; - unshuffle = dv_place_audio60; + s->picture.interlaced_frame = 1; + s->picture.top_field_first = 0; + + s->buf = buf; + avctx->execute(avctx, dv_decode_mt, (void**)&dv_anchor[0], NULL, + s->sys->n_difchan * s->sys->difseg_size * 27); + + emms_c(); + + /* return image */ + *data_size = sizeof(AVFrame); + *(AVFrame*)data= s->picture; + + return s->sys->frame_size; +} +#endif + + +static inline int dv_write_pack(enum dv_pack_type pack_id, DVVideoContext *c, uint8_t* buf) +{ + /* + * Here's what SMPTE314M says about these two: + * (page 6) APTn, AP1n, AP2n, AP3n: These data shall be identical + * as track application IDs (APTn = 001, AP1n = + * 001, AP2n = 001, AP3n = 001), if the source signal + * comes from a digital VCR. If the signal source is + * unknown, all bits for these data shall be set to 1. + * (page 12) STYPE: STYPE defines a signal type of video signal + * 00000b = 4:1:1 compression + * 00100b = 4:2:2 compression + * XXXXXX = Reserved + * Now, I've got two problems with these statements: + * 1. it looks like APT == 111b should be a safe bet, but it isn't. + * It seems that for PAL as defined in IEC 61834 we have to set + * APT to 000 and for SMPTE314M to 001. + * 2. It is not at all clear what STYPE is used for 4:2:0 PAL + * compression scheme (if any). + */ + int apt = (c->sys->pix_fmt == PIX_FMT_YUV420P ? 0 : 1); + int stype = (c->sys->pix_fmt == PIX_FMT_YUV422P ? 4 : 0); + + uint8_t aspect = 0; + if((int)(av_q2d(c->avctx->sample_aspect_ratio) * c->avctx->width / c->avctx->height * 10) == 17) /* 16:9 */ + aspect = 0x02; + + buf[0] = (uint8_t)pack_id; + switch (pack_id) { + case dv_header525: /* I can't imagine why these two weren't defined as real */ + case dv_header625: /* packs in SMPTE314M -- they definitely look like ones */ + buf[1] = 0xf8 | /* reserved -- always 1 */ + (apt & 0x07); /* APT: Track application ID */ + buf[2] = (0 << 7) | /* TF1: audio data is 0 - valid; 1 - invalid */ + (0x0f << 3) | /* reserved -- always 1 */ + (apt & 0x07); /* AP1: Audio application ID */ + buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */ + (0x0f << 3) | /* reserved -- always 1 */ + (apt & 0x07); /* AP2: Video application ID */ + buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */ + (0x0f << 3) | /* reserved -- always 1 */ + (apt & 0x07); /* AP3: Subcode application ID */ + break; + case dv_video_source: + buf[1] = 0xff; /* reserved -- always 1 */ + buf[2] = (1 << 7) | /* B/W: 0 - b/w, 1 - color */ + (1 << 6) | /* following CLF is valid - 0, invalid - 1 */ + (3 << 4) | /* CLF: color frames id (see ITU-R BT.470-4) */ + 0xf; /* reserved -- always 1 */ + buf[3] = (3 << 6) | /* reserved -- always 1 */ + (c->sys->dsf << 5) | /* system: 60fields/50fields */ + stype; /* signal type video compression */ + buf[4] = 0xff; /* VISC: 0xff -- no information */ + break; + case dv_video_control: + buf[1] = (0 << 6) | /* Copy generation management (CGMS) 0 -- free */ + 0x3f; /* reserved -- always 1 */ + buf[2] = 0xc8 | /* reserved -- always b11001xxx */ + aspect; + buf[3] = (1 << 7) | /* Frame/field flag 1 -- frame, 0 -- field */ + (1 << 6) | /* First/second field flag 0 -- field 2, 1 -- field 1 */ + (1 << 5) | /* Frame change flag 0 -- same picture as before, 1 -- different */ + (1 << 4) | /* 1 - interlaced, 0 - noninterlaced */ + 0xc; /* reserved -- always b1100 */ + buf[4] = 0xff; /* reserved -- always 1 */ + break; + default: + buf[1] = buf[2] = buf[3] = buf[4] = 0xff; } - - /* for each DIF segment */ - buf_ptr = buf; - for (difseg = 0; difseg < nb_dif_segs; difseg++) { - buf_ptr += 6 * 80; /* skip DIF segment header */ - for (ad = 0; ad < 9; ad++) { - - for (dp = 8; dp < 80; dp+=2) { - if (quant == 0) { /* 16bit quantization */ - i = unshuffle[difseg][ad] + (dp - 8)/2 * stride; - ((short *)data)[i] = (buf_ptr[dp] << 8) | buf_ptr[dp+1]; - } else { /* 12bit quantization */ - if (difseg >= nb_dif_segs/2) - goto out; /* We're not doing 4ch at this time */ - - lc = ((uint16_t)buf_ptr[dp] << 4) | - ((uint16_t)buf_ptr[dp+2] >> 4); - rc = ((uint16_t)buf_ptr[dp+1] << 4) | - ((uint16_t)buf_ptr[dp+2] & 0x0f); - lc = dv_audio_12to16(lc); - rc = dv_audio_12to16(rc); - - i = unshuffle[difseg][ad] + (dp - 8)/3 * stride; - ((short *)data)[i] = lc; - i = unshuffle[difseg+nb_dif_segs/2][ad] + (dp - 8)/3 * stride; - ((short *)data)[i] = rc; - ++dp; - } - } - - buf_ptr += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */ + return 5; +} + +#ifdef CONFIG_DVVIDEO_ENCODER +static void dv_format_frame(DVVideoContext* c, uint8_t* buf) +{ + int chan, i, j, k; + + for (chan = 0; chan < c->sys->n_difchan; chan++) { + for (i = 0; i < c->sys->difseg_size; i++) { + memset(buf, 0xff, 80 * 6); /* First 6 DIF blocks are for control data */ + + /* DV header: 1DIF */ + buf += dv_write_dif_id(dv_sect_header, chan, i, 0, buf); + buf += dv_write_pack((c->sys->dsf ? dv_header625 : dv_header525), c, buf); + buf += 72; /* unused bytes */ + + /* DV subcode: 2DIFs */ + for (j = 0; j < 2; j++) { + buf += dv_write_dif_id(dv_sect_subcode, chan, i, j, buf); + for (k = 0; k < 6; k++) + buf += dv_write_ssyb_id(k, (i < c->sys->difseg_size/2), buf) + 5; + buf += 29; /* unused bytes */ + } + + /* DV VAUX: 3DIFS */ + for (j = 0; j < 3; j++) { + buf += dv_write_dif_id(dv_sect_vaux, chan, i, j, buf); + buf += dv_write_pack(dv_video_source, c, buf); + buf += dv_write_pack(dv_video_control, c, buf); + buf += 7*5; + buf += dv_write_pack(dv_video_source, c, buf); + buf += dv_write_pack(dv_video_control, c, buf); + buf += 4*5 + 2; /* unused bytes */ + } + + /* DV Audio/Video: 135 Video DIFs + 9 Audio DIFs */ + for (j = 0; j < 135; j++) { + if (j%15 == 0) { + memset(buf, 0xff, 80); + buf += dv_write_dif_id(dv_sect_audio, chan, i, j/15, buf); + buf += 77; /* audio control & shuffled PCM audio */ + } + buf += dv_write_dif_id(dv_sect_video, chan, i, j, buf); + buf += 77; /* 1 video macro block: 1 bytes control + 4 * 14 bytes Y 8x8 data + 10 bytes Cr 8x8 data + 10 bytes Cb 8x8 data */ + } } } +} + + +static int dvvideo_encode_frame(AVCodecContext *c, uint8_t *buf, int buf_size, + void *data) +{ + DVVideoContext *s = c->priv_data; + + s->sys = dv_codec_profile(c); + if (!s->sys) + return -1; + if(buf_size < s->sys->frame_size) + return -1; + + c->pix_fmt = s->sys->pix_fmt; + s->picture = *((AVFrame *)data); + s->picture.key_frame = 1; + s->picture.pict_type = FF_I_TYPE; + + s->buf = buf; + c->execute(c, dv_encode_mt, (void**)&dv_anchor[0], NULL, + s->sys->n_difchan * s->sys->difseg_size * 27); + + emms_c(); + + dv_format_frame(s, buf); -out: - return buf_size; + return s->sys->frame_size; } +#endif -static int dvaudio_decode_end(AVCodecContext *avctx) +static int dvvideo_close(AVCodecContext *c) { - // DVAudioDecodeContext *s = avctx->priv_data; + DVVideoContext *s = c->priv_data; + + if(s->picture.data[0]) + c->release_buffer(c, &s->picture); + return 0; } -AVCodec dvaudio_decoder = { - "dvaudio", - CODEC_TYPE_AUDIO, - CODEC_ID_DVAUDIO, - sizeof(DVAudioDecodeContext), - dvaudio_decode_init, + +#ifdef CONFIG_DVVIDEO_ENCODER +AVCodec dvvideo_encoder = { + "dvvideo", + CODEC_TYPE_VIDEO, + CODEC_ID_DVVIDEO, + sizeof(DVVideoContext), + dvvideo_init, + dvvideo_encode_frame, + .pix_fmts = (enum PixelFormat[]) {PIX_FMT_YUV411P, PIX_FMT_YUV422P, PIX_FMT_YUV420P, PIX_FMT_NONE}, + .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"), +}; +#endif // CONFIG_DVVIDEO_ENCODER + +#ifdef CONFIG_DVVIDEO_DECODER +AVCodec dvvideo_decoder = { + "dvvideo", + CODEC_TYPE_VIDEO, + CODEC_ID_DVVIDEO, + sizeof(DVVideoContext), + dvvideo_init, NULL, - dvaudio_decode_end, - dvaudio_decode_frame, - 0, - NULL + dvvideo_close, + dvvideo_decode_frame, + CODEC_CAP_DR1, + NULL, + .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"), }; +#endif