X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=libavcodec%2Fdv.c;h=81d28d1fb3c08aedf6a4ad5980b191b25b18eab1;hb=bb198c4997d5036f3bf91de51e44f807115677d0;hp=67112747042ebdd108787dc2b9c2187706b1131d;hpb=c787cb339ed7b49a303b7d8b7a5197b38e89c7c3;p=ffmpeg diff --git a/libavcodec/dv.c b/libavcodec/dv.c index 67112747042..81d28d1fb3c 100644 --- a/libavcodec/dv.c +++ b/libavcodec/dv.c @@ -16,1294 +16,290 @@ * Many thanks to Dan Dennedy for providing wealth * of DV technical info. * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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, + * Libav 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 + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** - * @file libavcodec/dv.c + * @file * DV codec. */ -#define ALT_BITSTREAM_READER + +#include "libavutil/internal.h" +#include "libavutil/pixdesc.h" + #include "avcodec.h" -#include "dsputil.h" +#include "dv.h" +#include "dvdata.h" #include "get_bits.h" +#include "internal.h" #include "put_bits.h" #include "simple_idct.h" -#include "dvdata.h" -#include "dv_tablegen.h" - -//#undef NDEBUG -//#include - -typedef struct DVVideoContext { - const DVprofile *sys; - AVFrame picture; - AVCodecContext *avctx; - uint8_t *buf; - - uint8_t dv_zigzag[2][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); - me_cmp_func ildct_cmp; -} DVVideoContext; - -#define TEX_VLC_BITS 9 /* XXX: also include quantization */ -static RL_VLC_ELEM dv_rl_vlc[1184]; +RL_VLC_ELEM ff_dv_rl_vlc[1184]; -static inline int dv_work_pool_size(const DVprofile *d) +static inline void dv_calc_mb_coordinates(const AVDVProfile *d, int chan, + int seq, int slot, uint16_t *tbl) { - int size = d->n_difchan*d->difseg_size*27; - if (DV_PROFILE_IS_1080i50(d)) - size -= 3*27; - if (DV_PROFILE_IS_720p50(d)) - size -= 4*27; - return size; -} - -static inline void dv_calc_mb_coordinates(const DVprofile *d, int chan, int seq, int slot, - uint16_t *tbl) -{ - static const uint8_t off[] = { 2, 6, 8, 0, 4 }; + static const uint8_t off[] = { 2, 6, 8, 0, 4 }; static const uint8_t shuf1[] = { 36, 18, 54, 0, 72 }; static const uint8_t shuf2[] = { 24, 12, 36, 0, 48 }; - static const uint8_t shuf3[] = { 18, 9, 27, 0, 36 }; + static const uint8_t shuf3[] = { 18, 9, 27, 0, 36 }; - static const uint8_t l_start[] = {0, 4, 9, 13, 18, 22, 27, 31, 36, 40}; + static const uint8_t l_start[] = { 0, 4, 9, 13, 18, 22, 27, 31, 36, 40 }; static const uint8_t l_start_shuffled[] = { 9, 4, 13, 0, 18 }; - static const uint8_t serpent1[] = {0, 1, 2, 2, 1, 0, - 0, 1, 2, 2, 1, 0, - 0, 1, 2, 2, 1, 0, - 0, 1, 2, 2, 1, 0, - 0, 1, 2}; - static const uint8_t serpent2[] = {0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0, - 0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0, - 0, 1, 2, 3, 4, 5}; - - static const uint8_t remap[][2] = {{ 0, 0}, { 0, 0}, { 0, 0}, { 0, 0}, /* dummy */ - { 0, 0}, { 0, 1}, { 0, 2}, { 0, 3}, {10, 0}, - {10, 1}, {10, 2}, {10, 3}, {20, 0}, {20, 1}, - {20, 2}, {20, 3}, {30, 0}, {30, 1}, {30, 2}, - {30, 3}, {40, 0}, {40, 1}, {40, 2}, {40, 3}, - {50, 0}, {50, 1}, {50, 2}, {50, 3}, {60, 0}, - {60, 1}, {60, 2}, {60, 3}, {70, 0}, {70, 1}, - {70, 2}, {70, 3}, { 0,64}, { 0,65}, { 0,66}, - {10,64}, {10,65}, {10,66}, {20,64}, {20,65}, - {20,66}, {30,64}, {30,65}, {30,66}, {40,64}, - {40,65}, {40,66}, {50,64}, {50,65}, {50,66}, - {60,64}, {60,65}, {60,66}, {70,64}, {70,65}, - {70,66}, { 0,67}, {20,67}, {40,67}, {60,67}}; + static const uint8_t serpent1[] = { + 0, 1, 2, 2, 1, 0, + 0, 1, 2, 2, 1, 0, + 0, 1, 2, 2, 1, 0, + 0, 1, 2, 2, 1, 0, + 0, 1, 2 + }; + static const uint8_t serpent2[] = { + 0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0, + 0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0, + 0, 1, 2, 3, 4, 5 + }; + + static const uint8_t remap[][2] = { + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, /* dummy */ + { 0, 0 }, { 0, 1 }, { 0, 2 }, { 0, 3 }, { 10, 0 }, + { 10, 1 }, { 10, 2 }, { 10, 3 }, { 20, 0 }, { 20, 1 }, + { 20, 2 }, { 20, 3 }, { 30, 0 }, { 30, 1 }, { 30, 2 }, + { 30, 3 }, { 40, 0 }, { 40, 1 }, { 40, 2 }, { 40, 3 }, + { 50, 0 }, { 50, 1 }, { 50, 2 }, { 50, 3 }, { 60, 0 }, + { 60, 1 }, { 60, 2 }, { 60, 3 }, { 70, 0 }, { 70, 1 }, + { 70, 2 }, { 70, 3 }, { 0, 64 }, { 0, 65 }, { 0, 66 }, + { 10, 64 }, { 10, 65 }, { 10, 66 }, { 20, 64 }, { 20, 65 }, + { 20, 66 }, { 30, 64 }, { 30, 65 }, { 30, 66 }, { 40, 64 }, + { 40, 65 }, { 40, 66 }, { 50, 64 }, { 50, 65 }, { 50, 66 }, + { 60, 64 }, { 60, 65 }, { 60, 66 }, { 70, 64 }, { 70, 65 }, + { 70, 66 }, { 0, 67 }, { 20, 67 }, { 40, 67 }, { 60, 67 } + }; int i, k, m; int x, y, blk; - for (m=0; m<5; m++) { - switch (d->width) { - case 1440: - blk = (chan*11+seq)*27+slot; - - if (chan == 0 && seq == 11) { - x = m*27+slot; - if (x<90) { - y = 0; - } else { - x = (x - 90)*2; - y = 67; - } - } else { - i = (4*chan + blk + off[m])%11; - k = (blk/11)%27; + for (m = 0; m < 5; m++) { + switch (d->width) { + case 1440: + blk = (chan * 11 + seq) * 27 + slot; + + if (chan == 0 && seq == 11) { + x = m * 27 + slot; + if (x < 90) { + y = 0; + } else { + x = (x - 90) * 2; + y = 67; + } + } else { + i = (4 * chan + blk + off[m]) % 11; + k = (blk / 11) % 27; - x = shuf1[m] + (chan&1)*9 + k%9; - y = (i*3+k/9)*2 + (chan>>1) + 1; - } - tbl[m] = (x<<1)|(y<<9); - break; - case 1280: - blk = (chan*10+seq)*27+slot; + x = shuf1[m] + (chan & 1) * 9 + k % 9; + y = (i * 3 + k / 9) * 2 + (chan >> 1) + 1; + } + tbl[m] = (x << 1) | (y << 9); + break; + case 1280: + blk = (chan * 10 + seq) * 27 + slot; - i = (4*chan + (seq/5) + 2*blk + off[m])%10; - k = (blk/5)%27; + i = (4 * chan + (seq / 5) + 2 * blk + off[m]) % 10; + k = (blk / 5) % 27; - x = shuf1[m]+(chan&1)*9 + k%9; - y = (i*3+k/9)*2 + (chan>>1) + 4; + x = shuf1[m] + (chan & 1) * 9 + k % 9; + y = (i * 3 + k / 9) * 2 + (chan >> 1) + 4; - if (x >= 80) { - x = remap[y][0]+((x-80)<<(y>59)); - y = remap[y][1]; - } - tbl[m] = (x<<1)|(y<<9); - break; - case 960: - blk = (chan*10+seq)*27+slot; + if (x >= 80) { + x = remap[y][0] + ((x - 80) << (y > 59)); + y = remap[y][1]; + } + tbl[m] = (x << 1) | (y << 9); + break; + case 960: + blk = (chan * 10 + seq) * 27 + slot; - i = (4*chan + (seq/5) + 2*blk + off[m])%10; - k = (blk/5)%27 + (i&1)*3; + i = (4 * chan + (seq / 5) + 2 * blk + off[m]) % 10; + k = (blk / 5) % 27 + (i & 1) * 3; - x = shuf2[m] + k%6 + 6*(chan&1); - y = l_start[i] + k/6 + 45*(chan>>1); - tbl[m] = (x<<1)|(y<<9); - break; + x = shuf2[m] + k % 6 + 6 * (chan & 1); + y = l_start[i] + k / 6 + 45 * (chan >> 1); + tbl[m] = (x << 1) | (y << 9); + break; case 720: - switch (d->pix_fmt) { - case PIX_FMT_YUV422P: - x = shuf3[m] + slot/3; - y = serpent1[slot] + - ((((seq + off[m]) % d->difseg_size)<<1) + chan)*3; - tbl[m] = (x<<1)|(y<<8); - break; - case PIX_FMT_YUV420P: - x = shuf3[m] + slot/3; - y = serpent1[slot] + - ((seq + off[m]) % d->difseg_size)*3; - tbl[m] = (x<<1)|(y<<9); - break; - case PIX_FMT_YUV411P: - i = (seq + off[m]) % d->difseg_size; - k = slot + ((m==1||m==2)?3:0); - - x = l_start_shuffled[m] + k/6; - y = serpent2[k] + i*6; - if (x>21) - y = y*2 - i*6; - tbl[m] = (x<<2)|(y<<8); - break; - } + switch (d->pix_fmt) { + case AV_PIX_FMT_YUV422P: + x = shuf3[m] + slot / 3; + y = serpent1[slot] + + ((((seq + off[m]) % d->difseg_size) << 1) + chan) * 3; + tbl[m] = (x << 1) | (y << 8); + break; + case AV_PIX_FMT_YUV420P: + x = shuf3[m] + slot / 3; + y = serpent1[slot] + + ((seq + off[m]) % d->difseg_size) * 3; + tbl[m] = (x << 1) | (y << 9); + break; + case AV_PIX_FMT_YUV411P: + i = (seq + off[m]) % d->difseg_size; + k = slot + ((m == 1 || m == 2) ? 3 : 0); + + x = l_start_shuffled[m] + k / 6; + y = serpent2[k] + i * 6; + if (x > 21) + y = y * 2 - i * 6; + tbl[m] = (x << 2) | (y << 8); + break; + } default: - break; + break; } } } -static int dv_init_dynamic_tables(const DVprofile *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 +}; + +static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 }; + +int ff_dv_init_dynamic_tables(DVVideoContext *ctx, const AVDVProfile *d) { - int j,i,c,s,p; + int j, i, c, s, p; uint32_t *factor1, *factor2; const int *iweight1, *iweight2; - if (!d->work_chunks[dv_work_pool_size(d)-1].buf_offset) { - p = i = 0; - for (c=0; cn_difchan; c++) { - for (s=0; sdifseg_size; s++) { - p += 6; - for (j=0; j<27; j++) { - p += !(j%3); - if (!(DV_PROFILE_IS_1080i50(d) && c != 0 && s == 11) && - !(DV_PROFILE_IS_720p50(d) && s > 9)) { - dv_calc_mb_coordinates(d, c, s, j, &d->work_chunks[i].mb_coordinates[0]); - d->work_chunks[i++].buf_offset = p; - } - p += 5; + p = i = 0; + for (c = 0; c < d->n_difchan; c++) { + for (s = 0; s < d->difseg_size; s++) { + p += 6; + for (j = 0; j < 27; j++) { + p += !(j % 3); + if (!(DV_PROFILE_IS_1080i50(d) && c != 0 && s == 11) && + !(DV_PROFILE_IS_720p50(d) && s > 9)) { + dv_calc_mb_coordinates(d, c, s, j, &ctx->work_chunks[i].mb_coordinates[0]); + ctx->work_chunks[i++].buf_offset = p; } + p += 5; } } } - if (!d->idct_factor[DV_PROFILE_IS_HD(d)?8191:5631]) { - factor1 = &d->idct_factor[0]; - factor2 = &d->idct_factor[DV_PROFILE_IS_HD(d)?4096:2816]; - 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]; - } - if (DV_PROFILE_IS_HD(d)) { - 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]; - } + factor1 = &ctx->idct_factor[0]; + factor2 = &ctx->idct_factor[DV_PROFILE_IS_HD(d) ? 4096 : 2816]; + if (d->height == 720) { + iweight1 = &ff_dv_iweight_720_y[0]; + iweight2 = &ff_dv_iweight_720_c[0]; + } else { + iweight1 = &ff_dv_iweight_1080_y[0]; + iweight2 = &ff_dv_iweight_1080_c[0]; + } + if (DV_PROFILE_IS_HD(d)) { + 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 { - 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] << (dv_quant_shifts[s][c] + 1); - *factor2++ = (*factor1++) << 1; } - } + } else { + iweight1 = &ff_dv_iweight_88[0]; + for (j = 0; j < 2; j++, iweight1 = &ff_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; + } + } } } } -} return 0; } -static av_cold int dvvideo_init(AVCodecContext *avctx) +av_cold int ff_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]; + 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; /* 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]; + new_dv_vlc_bits[j] = ff_dv_vlc_bits[i]; + new_dv_vlc_len[j] = ff_dv_vlc_len[i]; + new_dv_vlc_run[j] = ff_dv_vlc_run[i]; + new_dv_vlc_level[j] = ff_dv_vlc_level[i]; - if (dv_vlc_level[i]) { + if (ff_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]; + new_dv_vlc_bits[j] = (ff_dv_vlc_bits[i] << 1) | 1; + new_dv_vlc_len[j] = ff_dv_vlc_len[i] + 1; + new_dv_vlc_run[j] = ff_dv_vlc_run[i]; + new_dv_vlc_level[j] = -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 */ - init_vlc(&dv_vlc, TEX_VLC_BITS, j, - new_dv_vlc_len, 1, 1, new_dv_vlc_bits, 2, 2, 0); + * 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); assert(dv_vlc.table_size == 1184); - for (i = 0; i < dv_vlc.table_size; i++){ + 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 + if (len < 0) { // more bits needed run = 0; level = code; } else { - run = new_dv_vlc_run [code] + 1; + 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; + ff_dv_rl_vlc[i].len = len; + ff_dv_rl_vlc[i].level = level; + ff_dv_rl_vlc[i].run = run; } - free_vlc(&dv_vlc); - - dv_vlc_map_tableinit(); + ff_free_vlc(&dv_vlc); } - /* Generic DSP setup */ - dsputil_init(&dsp, avctx); - ff_set_cmp(&dsp, dsp.ildct_cmp, avctx->ildct_cmp); - s->get_pixels = dsp.get_pixels; - s->ildct_cmp = dsp.ildct_cmp[5]; - - /* 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); - - avctx->coded_frame = &s->picture; s->avctx = avctx; avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; return 0; } - -static av_cold int dvvideo_init_encoder(AVCodecContext *avctx) -{ - if (!ff_dv_codec_profile(avctx)) { - av_log(avctx, AV_LOG_ERROR, "Found no DV profile for %ix%i %s video\n", - avctx->width, avctx->height, avcodec_get_pix_fmt_name(avctx->pix_fmt)); - return -1; - } - - return dvvideo_init(avctx); -} - -// #define VLC_DEBUG -// #define printf(...) av_log(NULL, AV_LOG_ERROR, __VA_ARGS__) - -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, int line_size, DCTELEM *block); - uint8_t partial_bit_count; - uint16_t partial_bit_buffer; - int shift_offset; -} BlockInfo; - -/* 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 put_bits_left(PutBitContext* s) -{ - return (s->buf_end - s->buf) * 8 - put_bits_count(s); -} - -/* decode ac coefficients */ -static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, DCTELEM *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(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; - - 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 inline void dv_calculate_mb_xy(DVVideoContext *s, DVwork_chunk *work_chunk, int m, int *mb_x, int *mb_y) -{ - *mb_x = work_chunk->mb_coordinates[m] & 0xff; - *mb_y = work_chunk->mb_coordinates[m] >> 8; - - /* We work with 720p frames split in half. The odd half-frame (chan==2,3) is displaced :-( */ - if (s->sys->height == 720 && !(s->buf[1]&0x0C)) { - *mb_y -= (*mb_y>17)?18:-72; /* shifting the Y coordinate down by 72/2 macro blocks */ - } -} - -/* mb_x and mb_y are in units of 8 pixels */ -static int dv_decode_video_segment(AVCodecContext *avctx, void *arg) -{ - DVVideoContext *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; - DCTELEM *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(DCTELEM, sblock, [5*DV_MAX_BPM], [64]); - LOCAL_ALIGNED_16(uint8_t, mb_bit_buffer, [80 + 4]); /* allow some slack */ - LOCAL_ALIGNED_16(uint8_t, vs_bit_buffer, [5 * 80 + 4]); /* allow some slack */ - const int log2_blocksize = 3-s->avctx->lowres; - int is_field_mode[5]; - - assert((((int)mb_bit_buffer) & 7) == 0); - assert((((int)vs_bit_buffer) & 7) == 0); - - 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; - 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->sys->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->sys->idct_factor[(class1 == 3)*2*22*64 + dct_mode*22*64 + - (quant + dv_quant_offset[class1])*64]; - } - 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 < 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; - } - } - /* 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 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 < s->sys->bpm; 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(avctx, 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++) { - dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y); - - /* idct_put'ting luminance */ - if ((s->sys->pix_fmt == PIX_FMT_YUV420P) || - (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) || - (s->sys->height >= 720 && mb_y != 134)) { - y_stride = (s->picture.linesize[0] << ((!is_field_mode[mb_index]) * log2_blocksize)); - } else { - y_stride = (2 << log2_blocksize); - } - y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + mb_x) << log2_blocksize); - linesize = s->picture.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 == PIX_FMT_YUV420P)) * s->picture.linesize[1] + - (mb_x >> ((s->sys->pix_fmt == PIX_FMT_YUV411P) ? 2 : 1))) << log2_blocksize); - for (j = 2; j; j--) { - uint8_t *c_ptr = s->picture.data[j] + c_offset; - 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_ptr1, *ptr1; - int x, y; - mb->idct_put(pixels, 8, block); - for (y = 0; y < (1 << log2_blocksize); y++, c_ptr += s->picture.linesize[j], pixels += 8) { - ptr1 = pixels + (1 << (log2_blocksize - 1)); - c_ptr1 = c_ptr + (s->picture.linesize[j] << log2_blocksize); - for (x = 0; x < (1 << (log2_blocksize - 1)); x++) { - c_ptr[x] = pixels[x]; - c_ptr1[x] = ptr1[x]; - } - } - block += 64; mb++; - } else { - y_stride = (mb_y == 134) ? (1 << log2_blocksize) : - s->picture.linesize[j] << ((!is_field_mode[mb_index]) * log2_blocksize); - linesize = s->picture.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; -} - -#if CONFIG_SMALL -/* 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, 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 int dv_guess_dct_mode(DVVideoContext *s, uint8_t *data, int linesize) { - if (s->avctx->flags & CODEC_FLAG_INTERLACED_DCT) { - int ps = s->ildct_cmp(NULL, data, NULL, linesize, 8) - 400; - if (ps > 0) { - int is = s->ildct_cmp(NULL, data , NULL, linesize<<1, 4) + - s->ildct_cmp(NULL, data + linesize, NULL, linesize<<1, 4); - return (ps > is); - } - } - - return 0; -} - -static av_always_inline int dv_init_enc_block(EncBlockInfo* bi, uint8_t *data, int linesize, DVVideoContext *s, int bias) -{ - const int *weight; - const uint8_t* zigzag_scan; - LOCAL_ALIGNED_16(DCTELEM, blk, [64]); - 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; - - assert((((int)blk) & 15) == 0); - - bi->area_q[0] = bi->area_q[1] = bi->area_q[2] = bi->area_q[3] = 0; - bi->partial_bit_count = 0; - bi->partial_bit_buffer = 0; - bi->cur_ac = 0; - if (data) { - bi->dct_mode = dv_guess_dct_mode(s, data, linesize); - s->get_pixels(blk, data, linesize); - s->fdct[bi->dct_mode](blk); - } else { - /* 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(blk, 0, 64*sizeof(*blk)); - bi->dct_mode = 0; - } - bi->mb[0] = blk[0]; - - zigzag_scan = bi->dct_mode ? ff_zigzag248_direct : ff_zigzag_direct; - weight = bi->dct_mode ? dv_weight_248 : dv_weight_88; - - 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; - } - - return bi->bit_size[0] + bi->bit_size[1] + bi->bit_size[2] + bi->bit_size[3]; -} - -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 int dv_encode_video_segment(AVCodecContext *avctx, void *arg) -{ - DVVideoContext *s = avctx->priv_data; - DVwork_chunk *work_chunk = arg; - int mb_index, i, j; - int mb_x, mb_y, c_offset, linesize, y_stride; - uint8_t* y_ptr; - uint8_t* dif; - uint8_t scratch[64]; - EncBlockInfo enc_blks[5*DV_MAX_BPM]; - PutBitContext pbs[5*DV_MAX_BPM]; - PutBitContext* pb; - EncBlockInfo* enc_blk; - int vs_bit_size = 0; - int qnos[5] = {15, 15, 15, 15, 15}; /* No quantization */ - int* qnosp = &qnos[0]; - - dif = &s->buf[work_chunk->buf_offset*80]; - enc_blk = &enc_blks[0]; - for (mb_index = 0; mb_index < 5; mb_index++) { - dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y); - - /* initializing luminance blocks */ - if ((s->sys->pix_fmt == PIX_FMT_YUV420P) || - (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) || - (s->sys->height >= 720 && mb_y != 134)) { - y_stride = s->picture.linesize[0] << 3; - } else { - y_stride = 16; - } - y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + mb_x) << 3); - linesize = s->picture.linesize[0]; - - if (s->sys->video_stype == 4) { /* SD 422 */ - vs_bit_size += - dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) + - dv_init_enc_block(enc_blk+1, NULL , linesize, s, 0) + - dv_init_enc_block(enc_blk+2, y_ptr + 8 , linesize, s, 0) + - dv_init_enc_block(enc_blk+3, NULL , linesize, s, 0); - } else { - vs_bit_size += - dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) + - dv_init_enc_block(enc_blk+1, y_ptr + 8 , linesize, s, 0) + - dv_init_enc_block(enc_blk+2, y_ptr + y_stride, linesize, s, 0) + - dv_init_enc_block(enc_blk+3, y_ptr + 8 + y_stride, linesize, s, 0); - } - enc_blk += 4; - - /* initializing chrominance blocks */ - c_offset = (((mb_y >> (s->sys->pix_fmt == PIX_FMT_YUV420P)) * s->picture.linesize[1] + - (mb_x >> ((s->sys->pix_fmt == PIX_FMT_YUV411P) ? 2 : 1))) << 3); - for (j = 2; j; j--) { - uint8_t *c_ptr = s->picture.data[j] + c_offset; - linesize = s->picture.linesize[j]; - y_stride = (mb_y == 134) ? 8 : (s->picture.linesize[j] << 3); - if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) { - uint8_t* d; - uint8_t* b = scratch; - for (i = 0; i < 8; i++) { - d = c_ptr + (linesize << 3); - b[0] = c_ptr[0]; b[1] = c_ptr[1]; b[2] = c_ptr[2]; b[3] = c_ptr[3]; - b[4] = d[0]; b[5] = d[1]; b[6] = d[2]; b[7] = d[3]; - c_ptr += linesize; - b += 8; - } - c_ptr = scratch; - linesize = 8; - } - - vs_bit_size += dv_init_enc_block( enc_blk++, c_ptr , linesize, s, 1); - if (s->sys->bpm == 8) { - vs_bit_size += dv_init_enc_block(enc_blk++, c_ptr + y_stride, linesize, s, 1); - } - } - } - - if (vs_total_ac_bits < vs_bit_size) - dv_guess_qnos(&enc_blks[0], qnosp); - - /* DIF encoding process */ - for (j=0; j<5*s->sys->bpm;) { - int start_mb = j; - - dif[3] = *qnosp++; - dif += 4; - - /* First pass over individual cells only */ - for (i=0; isys->bpm; i++, j++) { - int sz = s->sys->block_sizes[i]>>3; - - init_put_bits(&pbs[j], dif, sz); - put_sbits(&pbs[j], 9, ((enc_blks[j].mb[0] >> 3) - 1024 + 2) >> 2); - put_bits(&pbs[j], 1, enc_blks[j].dct_mode); - put_bits(&pbs[j], 2, enc_blks[j].cno); - - dv_encode_ac(&enc_blks[j], &pbs[j], &pbs[j+1]); - dif += sz; - } - - /* Second pass over each MB space */ - pb = &pbs[start_mb]; - for (i=0; isys->bpm; i++) { - if (enc_blks[start_mb+i].partial_bit_count) - pb = dv_encode_ac(&enc_blks[start_mb+i], pb, &pbs[start_mb+s->sys->bpm]); - } - } - - /* Third and final pass over the whole video segment space */ - pb = &pbs[0]; - for (j=0; j<5*s->sys->bpm; j++) { - if (enc_blks[j].partial_bit_count) - pb = dv_encode_ac(&enc_blks[j], pb, &pbs[s->sys->bpm*5]); - if (enc_blks[j].partial_bit_count) - av_log(avctx, AV_LOG_ERROR, "ac bitstream overflow\n"); - } - - for (j=0; j<5*s->sys->bpm; j++) { - int pos; - int size = pbs[j].size_in_bits >> 3; - flush_put_bits(&pbs[j]); - pos = put_bits_count(&pbs[j]) >> 3; - if (pos > size) { - av_log(avctx, AV_LOG_ERROR, "bitstream written beyond buffer size\n"); - return -1; - } - memset(pbs[j].buf + pos, 0xff, size - pos); - } - - return 0; -} - -#if CONFIG_DVVIDEO_DECODER -/* 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, - AVPacket *avpkt) -{ - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - DVVideoContext *s = avctx->priv_data; - - s->sys = ff_dv_frame_profile(s->sys, buf, buf_size); - if (!s->sys || buf_size < s->sys->frame_size || dv_init_dynamic_tables(s->sys)) { - av_log(avctx, AV_LOG_ERROR, "could not find dv frame profile\n"); - 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 = s->sys->time_base; - 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_video_segment, s->sys->work_chunks, NULL, - dv_work_pool_size(s->sys), sizeof(DVwork_chunk)); - - emms_c(); - - /* return image */ - *data_size = sizeof(AVFrame); - *(AVFrame*)data = s->picture; - - return s->sys->frame_size; -} -#endif /* CONFIG_DVVIDEO_DECODER */ - - -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); - - 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 */ - c->sys->video_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; -} - -#if 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 macroblock: 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 = ff_dv_codec_profile(c); - if (!s->sys || buf_size < s->sys->frame_size || dv_init_dynamic_tables(s->sys)) - 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_video_segment, s->sys->work_chunks, NULL, - dv_work_pool_size(s->sys), sizeof(DVwork_chunk)); - - 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; -} - - -#if CONFIG_DVVIDEO_ENCODER -AVCodec dvvideo_encoder = { - "dvvideo", - CODEC_TYPE_VIDEO, - CODEC_ID_DVVIDEO, - sizeof(DVVideoContext), - dvvideo_init_encoder, - dvvideo_encode_frame, - .pix_fmts = (const 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 - -#if 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, - .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"), -}; -#endif