diff options
Diffstat (limited to 'src/libffmpeg/libavcodec/dv.c')
| -rw-r--r-- | src/libffmpeg/libavcodec/dv.c | 1266 |
1 files changed, 0 insertions, 1266 deletions
diff --git a/src/libffmpeg/libavcodec/dv.c b/src/libffmpeg/libavcodec/dv.c deleted file mode 100644 index 505c88d49..000000000 --- a/src/libffmpeg/libavcodec/dv.c +++ /dev/null @@ -1,1266 +0,0 @@ -/* - * DV decoder - * Copyright (c) 2002 Fabrice Bellard. - * Copyright (c) 2004 Roman Shaposhnik. - * - * DV encoder - * Copyright (c) 2003 Roman Shaposhnik. - * - * 50 Mbps (DVCPRO50) support - * Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com> - * - * 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.c - * DV codec. - */ -#define ALT_BITSTREAM_READER -#include "avcodec.h" -#include "dsputil.h" -#include "mpegvideo.h" -#include "simple_idct.h" -#include "dvdata.h" - -//#undef NDEBUG -//#include <assert.h> - -typedef struct DVVideoContext { - const DVprofile* sys; - AVFrame picture; - AVCodecContext *avctx; - uint8_t *buf; - - uint8_t dv_zigzag[2][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); -} DVVideoContext; - -/* 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 void* dv_anchor[DV_ANCHOR_SIZE]; - -#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; -/* VLC encoding lookup table */ -static struct dv_vlc_pair { - uint32_t vlc; - uint8_t size; -} (*dv_vlc_map)[DV_VLC_MAP_LEV_SIZE] = NULL; - -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++) { - /* 88DCT */ - for(i = 1; i < 64; i++) { - /* 88 table */ - 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; - } - - /* 248DCT */ - for(i = 1; i < 64; i++) { - /* 248 table */ - 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_init(AVCodecContext *avctx) -{ - DVVideoContext *s = avctx->priv_data; - DSPContext dsp; - static int done=0; - int i, j; - - if (!done) { - 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_vlc_map = av_mallocz_static(DV_VLC_MAP_LEV_SIZE*DV_VLC_MAP_RUN_SIZE*sizeof(struct dv_vlc_pair)); - if (!dv_vlc_map) - return -ENOMEM; - - /* dv_anchor lets each thread know its Id */ - for (i=0; i<DV_ANCHOR_SIZE; i++) - dv_anchor[i] = (void*)(size_t)i; - - /* it's faster to include sign bit in a generic VLC parsing scheme */ - for (i=0, j=0; i<NB_DV_VLC; i++, j++) { - new_dv_vlc_bits[j] = dv_vlc_bits[i]; - new_dv_vlc_len[j] = dv_vlc_len[i]; - new_dv_vlc_run[j] = dv_vlc_run[i]; - new_dv_vlc_level[j] = dv_vlc_level[i]; - - if (dv_vlc_level[i]) { - new_dv_vlc_bits[j] <<= 1; - new_dv_vlc_len[j]++; - - j++; - new_dv_vlc_bits[j] = (dv_vlc_bits[i] << 1) | 1; - new_dv_vlc_len[j] = dv_vlc_len[i] + 1; - new_dv_vlc_run[j] = dv_vlc_run[i]; - new_dv_vlc_level[j] = -dv_vlc_level[i]; - } - } - - /* NOTE: as a trick, we use the fact the no codes are unused - to accelerate the parsing of partial codes */ - init_vlc(&dv_vlc, TEX_VLC_BITS, j, - new_dv_vlc_len, 1, 1, new_dv_vlc_bits, 2, 2, 0); - - dv_rl_vlc = av_mallocz_static(dv_vlc.table_size * sizeof(RL_VLC_ELEM)); - if (!dv_rl_vlc) - return -ENOMEM; - - for(i = 0; i < dv_vlc.table_size; i++){ - int code= dv_vlc.table[i][0]; - int len = dv_vlc.table[i][1]; - int level, run; - - if(len<0){ //more bits needed - run= 0; - level= code; - } else { - run= new_dv_vlc_run[code] + 1; - level= new_dv_vlc_level[code]; - } - dv_rl_vlc[i].len = len; - dv_rl_vlc[i].level = level; - dv_rl_vlc[i].run = run; - } - free_vlc(&dv_vlc); - - for (i = 0; i < NB_DV_VLC - 1; i++) { - if (dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE) - continue; -#ifdef DV_CODEC_TINY_TARGET - if (dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE) - continue; -#endif - - if (dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size != 0) - continue; - - 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 - } - } - - /* 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] = 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, dsp.idct_permutation); - - avctx->coded_frame = &s->picture; - s->avctx= avctx; - - return 0; -} - -// #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 dct_mode; - uint8_t partial_bit_count; - uint16_t partial_bit_buffer; - int shift_offset; -} BlockInfo; - -/* block size in bits */ -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 }; - -static inline int get_bits_left(GetBitContext *s) -{ - return s->size_in_bits - get_bits_count(s); -} - -static inline int get_bits_size(GetBitContext *s) -{ - return s->size_in_bits; -} - -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(GetBitContext *gb, BlockInfo *mb, DCTELEM *block) -{ - int last_index = get_bits_size(gb); - 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 partial_bit_count = mb->partial_bit_count; - int level, pos1, run, vlc_len, index; - - OPEN_READER(re, gb); - UPDATE_CACHE(re, gb); - - /* if we must parse a partial vlc, we do it here */ - if (partial_bit_count > 0) { - 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; - } - - /* get the AC coefficients until last_index is reached */ - for(;;) { -#ifdef VLC_DEBUG - printf("%2d: bits=%04x index=%d\n", pos, SHOW_UBITS(re, gb, 16), re_index); -#endif - /* 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 - pos += run; - if (pos >= 64) - 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, 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)); - } -} - -/* mb_x and mb_y are in units of 8 pixels */ -static inline void dv_decode_video_segment(DVVideoContext *s, - 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; - uint8_t *y_ptr; - void (*idct_put)(uint8_t *dest, int line_size, DCTELEM *block); - uint8_t *buf_ptr; - PutBitContext pb, vs_pb; - GetBitContext gb; - BlockInfo mb_data[5 * 6], *mb, *mb1; - DECLARE_ALIGNED_8(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 = &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 += 6, block1 += 6 * 64) { - /* skip header */ - quant = buf_ptr[3] & 0x0f; - buf_ptr += 4; - init_put_bits(&pb, mb_bit_buffer, 80); - mb = mb1; - block = block1; - for(j = 0;j < 6; j++) { - last_index = block_sizes[j]; - init_get_bits(&gb, buf_ptr, last_index); - - /* get the dc */ - dc = get_sbits(&gb, 9); - dct_mode = get_bits1(&gb); - mb->dct_mode = dct_mode; - mb->scan_table = s->dv_zigzag[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; - buf_ptr += last_index >> 3; - mb->pos = 0; - mb->partial_bit_count = 0; - -#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 */ - if (mb->pos >= 64) - bit_copy(&pb, &gb); - - block += 64; - mb++; - } - - /* pass 2 : we can do it just after */ -#ifdef VLC_DEBUG - printf("***pass 2 size=%d MB#=%d\n", put_bits_count(&pb), mb_index); -#endif - block = block1; - mb = mb1; - 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->pos < 64) - break; - } - } - /* all blocks are finished, so the extra bytes can be used at - the video segment level */ - if (j >= 6) - bit_copy(&vs_pb, &gb); - } - - /* we need a pass other the whole video segment */ -#ifdef VLC_DEBUG - printf("***pass 3 size=%d\n", put_bits_count(&vs_pb)); -#endif - block = &sblock[0][0]; - mb = mb_data; - 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->pos < 64) { -#ifdef VLC_DEBUG - printf("start %d:%d\n", mb_index, j); -#endif - 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 = &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; - if (s->sys->pix_fmt == PIX_FMT_YUV422P) { - y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + (mb_x>>1))<<log2_blocksize); - c_offset = ((mb_y * s->picture.linesize[1] + (mb_x >> 2))<<log2_blocksize); - } else { /* 4:1:1 or 4:2:0 */ - y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + mb_x)<<log2_blocksize); - if (s->sys->pix_fmt == PIX_FMT_YUV411P) - c_offset = ((mb_y * s->picture.linesize[1] + (mb_x >> 2))<<log2_blocksize); - else /* 4:2:0 */ - c_offset = (((mb_y >> 1) * s->picture.linesize[1] + (mb_x >> 1))<<log2_blocksize); - } - for(j = 0;j < 6; j++) { - 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)<<log2_blocksize), - s->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); - } - /* 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<<log2_blocksize), s->picture.linesize[0], block); - } else { - idct_put(y_ptr + (((j & 1) + (j >> 1) * s->picture.linesize[0])<<log2_blocksize), - s->picture.linesize[0], block); - } - } else { - 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<<log2_blocksize); y++) { - ptr1= ptr + (1<<(log2_blocksize-1)); - c_ptr1 = c_ptr + (linesize<<log2_blocksize); - for(x=0; x < (1<<(log2_blocksize-1)); x++){ - c_ptr[x]= ptr[x]; c_ptr1[x]= ptr1[x]; - } - c_ptr += linesize; - ptr += 8; - } - } else { - /* don't ask me why they inverted Cb and Cr ! */ - idct_put(s->picture.data[6 - j] + c_offset, - s->picture.linesize[6 - j], block); - } - } - } - block += 64; - mb++; - } - } -} - -#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; - } - } - - return size; -} - -static av_always_inline int dv_rl2vlc_size(int run, int level) -{ - int size; - - if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) { - size = dv_vlc_map[run][level].size; - } - 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; -} - -static av_always_inline int dv_rl2vlc_size(int run, int l) -{ - return dv_vlc_map[run][l].size; -} -#endif - -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<<size)-1); - } - if (pb + 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; -} - -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<mb_area_start[area+1]; i++) { - int level = blk[zigzag_scan[i]]; - - if (level+15 > 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; - } - } - } - 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 (; i<mb_area_start[area+1]; i= bi->next[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; - } - } - } - 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; - } - - return (score88 - score248 > -10); -} - -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] ; k<mb_area_start[a+1]; k= b->next[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 inline void dv_encode_video_segment(DVVideoContext *s, - uint8_t *dif, - const uint16_t *mb_pos_ptr) -{ - 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_8(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) & 7) == 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; - } - } - - if (vs_total_ac_bits < vs_bit_size) - dv_guess_qnos(&enc_blks[0], &qnos[0]); - - for (i=0; i<5; i++) { - dif[i*80 + 3] = qnos[i]; - } - - /* First pass over individual cells only */ - for (j=0; j<5*6; j++) - dv_encode_ac(&enc_blks[j], &pbs[j], &pbs[j+1]); - - /* 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) -{ - 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; -} - -#ifdef CONFIG_ENCODERS -static int dv_encode_mt(AVCodecContext *avctx, void* sl) -{ - 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_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 - or twice those for 50Mbps) */ -static int dvvideo_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int 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; - 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; - } - 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; - } - return 5; -} - -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 */ - } - } - } -} - - -#ifdef CONFIG_ENCODERS -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); - - return s->sys->frame_size; -} -#endif - -static int dvvideo_close(AVCodecContext *c) -{ - DVVideoContext *s = c->priv_data; - - if(s->picture.data[0]) - c->release_buffer(c, &s->picture); - - return 0; -} - - -#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, -1}, -}; -#endif // CONFIG_DVVIDEO_ENCODER - -#ifdef CONFIG_DVVIDEO_DECODER -AVCodec dvvideo_decoder = { - "dvvideo", - CODEC_TYPE_VIDEO, - CODEC_ID_DVVIDEO, - sizeof(DVVideoContext), - dvvideo_init, - NULL, - dvvideo_close, - dvvideo_decode_frame, - CODEC_CAP_DR1, - NULL -}; -#endif |