mirror of
https://github.com/nyanmisaka/ffmpeg-rockchip.git
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710 lines
26 KiB
C
710 lines
26 KiB
C
/*
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* DV encoder
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* Copyright (c) 2003 Roman Shaposhnik
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* DV encoder
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*/
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#include "libavutil/attributes.h"
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#include "libavutil/pixdesc.h"
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#include "config.h"
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#include "avcodec.h"
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#include "internal.h"
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#include "put_bits.h"
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#include "dv.h"
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#include "dv_tablegen.h"
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static av_cold int dvvideo_encode_init(AVCodecContext *avctx)
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{
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if (!avpriv_dv_codec_profile(avctx)) {
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av_log(avctx, AV_LOG_ERROR, "Found no DV profile for %ix%i %s video. "
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"Valid DV profiles are:\n",
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avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt));
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ff_dv_print_profiles(avctx, AV_LOG_ERROR);
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return AVERROR(EINVAL);
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}
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avctx->coded_frame = av_frame_alloc();
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if (!avctx->coded_frame)
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return AVERROR(ENOMEM);
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dv_vlc_map_tableinit();
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return ff_dvvideo_init(avctx);
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}
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/* bit budget for AC only in 5 MBs */
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static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5;
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static const int mb_area_start[5] = { 1, 6, 21, 43, 64 };
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#if CONFIG_SMALL
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/* Converts run and level (where level != 0) pair into VLC, returning bit size */
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static av_always_inline int dv_rl2vlc(int run, int level, int sign, uint32_t* vlc)
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{
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int size;
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if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
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*vlc = dv_vlc_map[run][level].vlc | sign;
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size = dv_vlc_map[run][level].size;
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}
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else {
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if (level < DV_VLC_MAP_LEV_SIZE) {
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*vlc = dv_vlc_map[0][level].vlc | sign;
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size = dv_vlc_map[0][level].size;
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} else {
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*vlc = 0xfe00 | (level << 1) | sign;
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size = 16;
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}
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if (run) {
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*vlc |= ((run < 16) ? dv_vlc_map[run-1][0].vlc :
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(0x1f80 | (run - 1))) << size;
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size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
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}
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}
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return size;
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}
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static av_always_inline int dv_rl2vlc_size(int run, int level)
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{
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int size;
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if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
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size = dv_vlc_map[run][level].size;
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}
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else {
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size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16;
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if (run) {
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size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
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}
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}
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return size;
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}
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#else
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static av_always_inline int dv_rl2vlc(int run, int l, int sign, uint32_t* vlc)
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{
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*vlc = dv_vlc_map[run][l].vlc | sign;
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return dv_vlc_map[run][l].size;
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}
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static av_always_inline int dv_rl2vlc_size(int run, int l)
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{
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return dv_vlc_map[run][l].size;
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}
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#endif
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typedef struct EncBlockInfo {
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int area_q[4];
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int bit_size[4];
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int prev[5];
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int cur_ac;
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int cno;
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int dct_mode;
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int16_t mb[64];
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uint8_t next[64];
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uint8_t sign[64];
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uint8_t partial_bit_count;
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uint32_t partial_bit_buffer; /* we can't use uint16_t here */
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} EncBlockInfo;
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static av_always_inline PutBitContext* dv_encode_ac(EncBlockInfo* bi,
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PutBitContext* pb_pool,
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PutBitContext* pb_end)
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{
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int prev, bits_left;
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PutBitContext* pb = pb_pool;
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int size = bi->partial_bit_count;
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uint32_t vlc = bi->partial_bit_buffer;
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bi->partial_bit_count = bi->partial_bit_buffer = 0;
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for (;;){
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/* Find suitable storage space */
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for (; size > (bits_left = put_bits_left(pb)); pb++) {
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if (bits_left) {
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size -= bits_left;
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put_bits(pb, bits_left, vlc >> size);
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vlc = vlc & ((1 << size) - 1);
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}
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if (pb + 1 >= pb_end) {
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bi->partial_bit_count = size;
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bi->partial_bit_buffer = vlc;
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return pb;
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}
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}
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/* Store VLC */
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put_bits(pb, size, vlc);
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if (bi->cur_ac >= 64)
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break;
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/* Construct the next VLC */
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prev = bi->cur_ac;
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bi->cur_ac = bi->next[prev];
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if (bi->cur_ac < 64){
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size = dv_rl2vlc(bi->cur_ac - prev - 1, bi->mb[bi->cur_ac], bi->sign[bi->cur_ac], &vlc);
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} else {
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size = 4; vlc = 6; /* End Of Block stamp */
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}
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}
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return pb;
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}
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static av_always_inline int dv_guess_dct_mode(DVVideoContext *s, uint8_t *data, int linesize) {
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if (s->avctx->flags & CODEC_FLAG_INTERLACED_DCT) {
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int ps = s->ildct_cmp(NULL, data, NULL, linesize, 8) - 400;
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if (ps > 0) {
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int is = s->ildct_cmp(NULL, data , NULL, linesize<<1, 4) +
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s->ildct_cmp(NULL, data + linesize, NULL, linesize<<1, 4);
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return ps > is;
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}
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}
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return 0;
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}
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static const int dv_weight_bits = 18;
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static const int dv_weight_88[64] = {
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131072, 257107, 257107, 242189, 252167, 242189, 235923, 237536,
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237536, 235923, 229376, 231390, 223754, 231390, 229376, 222935,
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224969, 217965, 217965, 224969, 222935, 200636, 218652, 211916,
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212325, 211916, 218652, 200636, 188995, 196781, 205965, 206433,
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206433, 205965, 196781, 188995, 185364, 185364, 200636, 200704,
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200636, 185364, 185364, 174609, 180568, 195068, 195068, 180568,
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174609, 170091, 175557, 189591, 175557, 170091, 165371, 170627,
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170627, 165371, 160727, 153560, 160727, 144651, 144651, 136258,
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};
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static const int dv_weight_248[64] = {
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131072, 242189, 257107, 237536, 229376, 200636, 242189, 223754,
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224969, 196781, 262144, 242189, 229376, 200636, 257107, 237536,
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211916, 185364, 235923, 217965, 229376, 211916, 206433, 180568,
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242189, 223754, 224969, 196781, 211916, 185364, 235923, 217965,
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200704, 175557, 222935, 205965, 200636, 185364, 195068, 170627,
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229376, 211916, 206433, 180568, 200704, 175557, 222935, 205965,
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175557, 153560, 188995, 174609, 165371, 144651, 200636, 185364,
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195068, 170627, 175557, 153560, 188995, 174609, 165371, 144651,
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};
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static av_always_inline int dv_init_enc_block(EncBlockInfo* bi, uint8_t *data, int linesize, DVVideoContext *s, int bias)
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{
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const int *weight;
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const uint8_t* zigzag_scan;
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LOCAL_ALIGNED_16(int16_t, blk, [64]);
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int i, area;
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/* We offer two different methods for class number assignment: the
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method suggested in SMPTE 314M Table 22, and an improved
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method. The SMPTE method is very conservative; it assigns class
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3 (i.e. severe quantization) to any block where the largest AC
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component is greater than 36. Libav's DV encoder tracks AC bit
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consumption precisely, so there is no need to bias most blocks
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towards strongly lossy compression. Instead, we assign class 2
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to most blocks, and use class 3 only when strictly necessary
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(for blocks whose largest AC component exceeds 255). */
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#if 0 /* SMPTE spec method */
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static const int classes[] = {12, 24, 36, 0xffff};
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#else /* improved Libav method */
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static const int classes[] = {-1, -1, 255, 0xffff};
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#endif
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int max = classes[0];
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int prev = 0;
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assert((((int)blk) & 15) == 0);
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bi->area_q[0] = bi->area_q[1] = bi->area_q[2] = bi->area_q[3] = 0;
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bi->partial_bit_count = 0;
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bi->partial_bit_buffer = 0;
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bi->cur_ac = 0;
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if (data) {
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bi->dct_mode = dv_guess_dct_mode(s, data, linesize);
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s->get_pixels(blk, data, linesize);
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s->fdct[bi->dct_mode](blk);
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} else {
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/* We rely on the fact that encoding all zeros leads to an immediate EOB,
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which is precisely what the spec calls for in the "dummy" blocks. */
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memset(blk, 0, 64*sizeof(*blk));
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bi->dct_mode = 0;
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}
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bi->mb[0] = blk[0];
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zigzag_scan = bi->dct_mode ? ff_dv_zigzag248_direct : ff_zigzag_direct;
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weight = bi->dct_mode ? dv_weight_248 : dv_weight_88;
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for (area = 0; area < 4; area++) {
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bi->prev[area] = prev;
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bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
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for (i = mb_area_start[area]; i < mb_area_start[area+1]; i++) {
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int level = blk[zigzag_scan[i]];
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if (level + 15 > 30U) {
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bi->sign[i] = (level >> 31) & 1;
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/* weight it and and shift down into range, adding for rounding */
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/* the extra division by a factor of 2^4 reverses the 8x expansion of the DCT
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AND the 2x doubling of the weights */
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level = (FFABS(level) * weight[i] + (1 << (dv_weight_bits+3))) >> (dv_weight_bits+4);
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bi->mb[i] = level;
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if (level > max)
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max = level;
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bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, level);
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bi->next[prev]= i;
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prev = i;
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}
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}
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}
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bi->next[prev]= i;
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for (bi->cno = 0; max > classes[bi->cno]; bi->cno++);
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bi->cno += bias;
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if (bi->cno >= 3) {
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bi->cno = 3;
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prev = 0;
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i = bi->next[prev];
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for (area = 0; area < 4; area++) {
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bi->prev[area] = prev;
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bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :)
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for (; i < mb_area_start[area+1]; i = bi->next[i]) {
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bi->mb[i] >>= 1;
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if (bi->mb[i]) {
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bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, bi->mb[i]);
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bi->next[prev]= i;
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prev = i;
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}
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}
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}
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bi->next[prev]= i;
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}
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return bi->bit_size[0] + bi->bit_size[1] + bi->bit_size[2] + bi->bit_size[3];
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}
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static inline void dv_guess_qnos(EncBlockInfo* blks, int* qnos)
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{
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int size[5];
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int i, j, k, a, prev, a2;
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EncBlockInfo* b;
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size[0] = size[1] = size[2] = size[3] = size[4] = 1 << 24;
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do {
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b = blks;
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for (i = 0; i < 5; i++) {
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if (!qnos[i])
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continue;
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qnos[i]--;
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size[i] = 0;
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for (j = 0; j < 6; j++, b++) {
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for (a = 0; a < 4; a++) {
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if (b->area_q[a] != ff_dv_quant_shifts[qnos[i] + ff_dv_quant_offset[b->cno]][a]) {
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b->bit_size[a] = 1; // 4 areas 4 bits for EOB :)
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b->area_q[a]++;
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prev = b->prev[a];
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assert(b->next[prev] >= mb_area_start[a+1] || b->mb[prev]);
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for (k = b->next[prev] ; k < mb_area_start[a+1]; k = b->next[k]) {
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b->mb[k] >>= 1;
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if (b->mb[k]) {
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b->bit_size[a] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
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prev = k;
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} else {
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if (b->next[k] >= mb_area_start[a+1] && b->next[k]<64){
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for (a2 = a + 1; b->next[k] >= mb_area_start[a2+1]; a2++)
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b->prev[a2] = prev;
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assert(a2 < 4);
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assert(b->mb[b->next[k]]);
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b->bit_size[a2] += dv_rl2vlc_size(b->next[k] - prev - 1, b->mb[b->next[k]])
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-dv_rl2vlc_size(b->next[k] - k - 1, b->mb[b->next[k]]);
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assert(b->prev[a2] == k && (a2 + 1 >= 4 || b->prev[a2+1] != k));
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b->prev[a2] = prev;
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}
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b->next[prev] = b->next[k];
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}
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}
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b->prev[a+1]= prev;
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}
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size[i] += b->bit_size[a];
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}
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}
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if (vs_total_ac_bits >= size[0] + size[1] + size[2] + size[3] + size[4])
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return;
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}
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} while (qnos[0]|qnos[1]|qnos[2]|qnos[3]|qnos[4]);
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for (a = 2; a == 2 || vs_total_ac_bits < size[0]; a += a){
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b = blks;
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size[0] = 5 * 6 * 4; //EOB
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for (j = 0; j < 6 *5; j++, b++) {
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prev = b->prev[0];
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for (k = b->next[prev]; k < 64; k = b->next[k]) {
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if (b->mb[k] < a && b->mb[k] > -a){
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b->next[prev] = b->next[k];
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}else{
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size[0] += dv_rl2vlc_size(k - prev - 1, b->mb[k]);
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prev = k;
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}
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}
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}
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}
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}
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static int dv_encode_video_segment(AVCodecContext *avctx, void *arg)
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{
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DVVideoContext *s = avctx->priv_data;
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DVwork_chunk *work_chunk = arg;
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int mb_index, i, j;
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int mb_x, mb_y, c_offset, linesize, y_stride;
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uint8_t* y_ptr;
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uint8_t* dif;
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LOCAL_ALIGNED_8(uint8_t, scratch, [128]);
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EncBlockInfo enc_blks[5*DV_MAX_BPM];
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PutBitContext pbs[5*DV_MAX_BPM];
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PutBitContext* pb;
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EncBlockInfo* enc_blk;
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int vs_bit_size = 0;
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int qnos[5] = {15, 15, 15, 15, 15}; /* No quantization */
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int* qnosp = &qnos[0];
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dif = &s->buf[work_chunk->buf_offset*80];
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enc_blk = &enc_blks[0];
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for (mb_index = 0; mb_index < 5; mb_index++) {
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dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y);
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/* initializing luminance blocks */
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if ((s->sys->pix_fmt == AV_PIX_FMT_YUV420P) ||
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(s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) ||
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(s->sys->height >= 720 && mb_y != 134)) {
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y_stride = s->frame->linesize[0] << 3;
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} else {
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y_stride = 16;
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}
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y_ptr = s->frame->data[0] + ((mb_y * s->frame->linesize[0] + mb_x) << 3);
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linesize = s->frame->linesize[0];
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if (s->sys->video_stype == 4) { /* SD 422 */
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vs_bit_size +=
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dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) +
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dv_init_enc_block(enc_blk+1, NULL , linesize, s, 0) +
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dv_init_enc_block(enc_blk+2, y_ptr + 8 , linesize, s, 0) +
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dv_init_enc_block(enc_blk+3, NULL , linesize, s, 0);
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} else {
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vs_bit_size +=
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dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) +
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dv_init_enc_block(enc_blk+1, y_ptr + 8 , linesize, s, 0) +
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dv_init_enc_block(enc_blk+2, y_ptr + y_stride, linesize, s, 0) +
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dv_init_enc_block(enc_blk+3, y_ptr + 8 + y_stride, linesize, s, 0);
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}
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enc_blk += 4;
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/* initializing chrominance blocks */
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c_offset = (((mb_y >> (s->sys->pix_fmt == AV_PIX_FMT_YUV420P)) * s->frame->linesize[1] +
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(mb_x >> ((s->sys->pix_fmt == AV_PIX_FMT_YUV411P) ? 2 : 1))) << 3);
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for (j = 2; j; j--) {
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uint8_t *c_ptr = s->frame->data[j] + c_offset;
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linesize = s->frame->linesize[j];
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y_stride = (mb_y == 134) ? 8 : (s->frame->linesize[j] << 3);
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if (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
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|
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 += 16;
|
|
}
|
|
c_ptr = scratch;
|
|
linesize = 16;
|
|
}
|
|
|
|
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; i<s->sys->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; i<s->sys->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;
|
|
}
|
|
|
|
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 == AV_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;
|
|
}
|
|
|
|
static inline int dv_write_dif_id(enum dv_section_type t, uint8_t chan_num,
|
|
uint8_t seq_num, uint8_t dif_num,
|
|
uint8_t* buf)
|
|
{
|
|
buf[0] = (uint8_t)t; /* Section type */
|
|
buf[1] = (seq_num << 4) | /* DIF seq number 0-9 for 525/60; 0-11 for 625/50 */
|
|
(chan_num << 3) | /* FSC: for 50Mb/s 0 - first channel; 1 - second */
|
|
7; /* reserved -- always 1 */
|
|
buf[2] = dif_num; /* DIF block number Video: 0-134, Audio: 0-8 */
|
|
return 3;
|
|
}
|
|
|
|
|
|
static inline int dv_write_ssyb_id(uint8_t syb_num, uint8_t fr, uint8_t* buf)
|
|
{
|
|
if (syb_num == 0 || syb_num == 6) {
|
|
buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
|
|
(0 << 4) | /* AP3 (Subcode application ID) */
|
|
0x0f; /* reserved -- always 1 */
|
|
}
|
|
else if (syb_num == 11) {
|
|
buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
|
|
0x7f; /* reserved -- always 1 */
|
|
}
|
|
else {
|
|
buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
|
|
(0 << 4) | /* APT (Track application ID) */
|
|
0x0f; /* reserved -- always 1 */
|
|
}
|
|
buf[1] = 0xf0 | /* reserved -- always 1 */
|
|
(syb_num & 0x0f); /* SSYB number 0 - 11 */
|
|
buf[2] = 0xff; /* reserved -- always 1 */
|
|
return 3;
|
|
}
|
|
|
|
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, AVPacket *pkt,
|
|
const AVFrame *frame, int *got_packet)
|
|
{
|
|
DVVideoContext *s = c->priv_data;
|
|
int ret;
|
|
|
|
s->sys = avpriv_dv_codec_profile(c);
|
|
if (!s->sys || ff_dv_init_dynamic_tables(s->sys))
|
|
return -1;
|
|
if ((ret = ff_alloc_packet(pkt, s->sys->frame_size)) < 0) {
|
|
av_log(c, AV_LOG_ERROR, "Error getting output packet.\n");
|
|
return ret;
|
|
}
|
|
|
|
c->pix_fmt = s->sys->pix_fmt;
|
|
s->frame = frame;
|
|
c->coded_frame->key_frame = 1;
|
|
c->coded_frame->pict_type = AV_PICTURE_TYPE_I;
|
|
|
|
s->buf = pkt->data;
|
|
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, pkt->data);
|
|
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
*got_packet = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dvvideo_encode_close(AVCodecContext *avctx)
|
|
{
|
|
av_frame_free(&avctx->coded_frame);
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_dvvideo_encoder = {
|
|
.name = "dvvideo",
|
|
.long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_DVVIDEO,
|
|
.priv_data_size = sizeof(DVVideoContext),
|
|
.init = dvvideo_encode_init,
|
|
.encode2 = dvvideo_encode_frame,
|
|
.close = dvvideo_encode_close,
|
|
.capabilities = CODEC_CAP_SLICE_THREADS,
|
|
.pix_fmts = (const enum AVPixelFormat[]) {
|
|
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE
|
|
},
|
|
};
|