X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftags%2Fsynfig_0_61_05%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2Fmpeg12.c;fp=synfig-core%2Ftags%2Fsynfig_0_61_05%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2Fmpeg12.c;h=0000000000000000000000000000000000000000;hb=6fa8f2f38d4b0b35f8539bf94e27ae27015c7689;hp=b2736163c252f945101c01f688ad7f999d83c821;hpb=47fce282611fbba1044921d22ca887f9b53ad91a;p=synfig.git diff --git a/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavcodec/mpeg12.c b/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavcodec/mpeg12.c deleted file mode 100644 index b273616..0000000 --- a/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavcodec/mpeg12.c +++ /dev/null @@ -1,2594 +0,0 @@ -/* - * MPEG1 codec / MPEG2 decoder - * Copyright (c) 2000,2001 Fabrice Bellard. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -/** - * @file mpeg12.c - * MPEG1/2 codec - */ - -//#define DEBUG -#include "avcodec.h" -#include "dsputil.h" -#include "mpegvideo.h" - -#include "mpeg12data.h" - - -/* Start codes. */ -#define SEQ_END_CODE 0x000001b7 -#define SEQ_START_CODE 0x000001b3 -#define GOP_START_CODE 0x000001b8 -#define PICTURE_START_CODE 0x00000100 -#define SLICE_MIN_START_CODE 0x00000101 -#define SLICE_MAX_START_CODE 0x000001af -#define EXT_START_CODE 0x000001b5 -#define USER_START_CODE 0x000001b2 - -#define DC_VLC_BITS 9 -#define MV_VLC_BITS 9 -#define MBINCR_VLC_BITS 9 -#define MB_PAT_VLC_BITS 9 -#define MB_PTYPE_VLC_BITS 6 -#define MB_BTYPE_VLC_BITS 6 -#define TEX_VLC_BITS 9 - -static void mpeg1_encode_block(MpegEncContext *s, - DCTELEM *block, - int component); -static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added -static void mpeg1_skip_picture(MpegEncContext *s, int pict_num); -static inline int mpeg1_decode_block_inter(MpegEncContext *s, - DCTELEM *block, - int n); -static inline int mpeg1_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n); -static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, - DCTELEM *block, - int n); -static inline int mpeg2_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n); -static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred); - -#ifdef HAVE_XVMC -extern int XVMC_field_start(MpegEncContext *s, AVCodecContext *avctx); -extern int XVMC_field_end(MpegEncContext *s); -#endif - -#ifdef CONFIG_ENCODERS -static uint8_t (*mv_penalty)[MAX_MV*2+1]= NULL; -static uint8_t fcode_tab[MAX_MV*2+1]; - -static uint32_t uni_mpeg1_ac_vlc_bits[64*64*2]; -static uint8_t uni_mpeg1_ac_vlc_len [64*64*2]; - -/* simple include everything table for dc, first byte is bits number next 3 are code*/ -static uint32_t mpeg1_lum_dc_uni[512]; -static uint32_t mpeg1_chr_dc_uni[512]; - -static uint8_t mpeg1_index_run[2][64]; -static int8_t mpeg1_max_level[2][64]; -#endif - -static void init_2d_vlc_rl(RLTable *rl) -{ - int i; - - init_vlc(&rl->vlc, TEX_VLC_BITS, rl->n + 2, - &rl->table_vlc[0][1], 4, 2, - &rl->table_vlc[0][0], 4, 2); - - - rl->rl_vlc[0]= av_malloc(rl->vlc.table_size*sizeof(RL_VLC_ELEM)); - for(i=0; ivlc.table_size; i++){ - int code= rl->vlc.table[i][0]; - int len = rl->vlc.table[i][1]; - int level, run; - - if(len==0){ // illegal code - run= 65; - level= MAX_LEVEL; - }else if(len<0){ //more bits needed - run= 0; - level= code; - }else{ - if(code==rl->n){ //esc - run= 65; - level= 0; - }else if(code==rl->n+1){ //eob - run= 0; - level= 127; - }else{ - run= rl->table_run [code] + 1; - level= rl->table_level[code]; - } - } - rl->rl_vlc[0][i].len= len; - rl->rl_vlc[0][i].level= level; - rl->rl_vlc[0][i].run= run; - } -} - -#ifdef CONFIG_ENCODERS -static void init_uni_ac_vlc(RLTable *rl, uint32_t *uni_ac_vlc_bits, uint8_t *uni_ac_vlc_len){ - int i; - - for(i=0; i<128; i++){ - int level= i-64; - int run; - for(run=0; run<64; run++){ - int len, bits, code; - - int alevel= ABS(level); - int sign= (level>>31)&1; - - if (alevel > rl->max_level[0][run]) - code= 111; /*rl->n*/ - else - code= rl->index_run[0][run] + alevel - 1; - - if (code < 111 /* rl->n */) { - /* store the vlc & sign at once */ - len= mpeg1_vlc[code][1]+1; - bits= (mpeg1_vlc[code][0]<<1) + sign; - } else { - len= mpeg1_vlc[111/*rl->n*/][1]+6; - bits= mpeg1_vlc[111/*rl->n*/][0]<<6; - - bits|= run; - if (alevel < 128) { - bits<<=8; len+=8; - bits|= level & 0xff; - } else { - bits<<=16; len+=16; - bits|= level & 0xff; - if (level < 0) { - bits|= 0x8001 + level + 255; - } else { - bits|= level & 0xffff; - } - } - } - - uni_ac_vlc_bits[UNI_AC_ENC_INDEX(run, i)]= bits; - uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len; - } - } -} - -static void put_header(MpegEncContext *s, int header) -{ - align_put_bits(&s->pb); - put_bits(&s->pb, 16, header>>16); - put_bits(&s->pb, 16, header&0xFFFF); -} - -/* put sequence header if needed */ -static void mpeg1_encode_sequence_header(MpegEncContext *s) -{ - unsigned int vbv_buffer_size; - unsigned int fps, v; - int n, i; - uint64_t time_code; - float best_aspect_error= 1E10; - float aspect_ratio= s->avctx->aspect_ratio; - int constraint_parameter_flag; - - if(aspect_ratio==0.0) aspect_ratio= s->width / (float)s->height; //pixel aspect 1:1 (VGA) - - if (s->current_picture.key_frame) { - /* mpeg1 header repeated every gop */ - put_header(s, SEQ_START_CODE); - - /* search closest frame rate */ - { - int i, dmin, d; - s->frame_rate_index = 0; - dmin = 0x7fffffff; - for(i=1;i<14;i++) { - if(s->avctx->strict_std_compliance >= 0 && i>=9) break; - - d = abs(MPEG1_FRAME_RATE_BASE*(int64_t)s->avctx->frame_rate/s->avctx->frame_rate_base - frame_rate_tab[i]); - if (d < dmin) { - dmin = d; - s->frame_rate_index = i; - } - } - } - - put_bits(&s->pb, 12, s->width); - put_bits(&s->pb, 12, s->height); - - for(i=1; i<15; i++){ - float error= mpeg1_aspect[i] - s->width/(s->height*aspect_ratio); - error= ABS(error); - - if(error < best_aspect_error){ - best_aspect_error= error; - s->aspect_ratio_info= i; - } - } - - put_bits(&s->pb, 4, s->aspect_ratio_info); - put_bits(&s->pb, 4, s->frame_rate_index); - - if(s->avctx->rc_max_rate){ - v = (s->avctx->rc_max_rate + 399) / 400; - if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO) - v = 0x3ffff; - }else{ - v= 0x3FFFF; - } - - if(s->avctx->rc_buffer_size) - vbv_buffer_size = s->avctx->rc_buffer_size; - else - /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */ - vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024; - vbv_buffer_size= (vbv_buffer_size + 16383) / 16384; - - put_bits(&s->pb, 18, v & 0x3FFFF); - put_bits(&s->pb, 1, 1); /* marker */ - put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF); - - constraint_parameter_flag= - s->width <= 768 && s->height <= 576 && - s->mb_width * s->mb_height <= 396 && - s->mb_width * s->mb_height * frame_rate_tab[s->frame_rate_index] <= MPEG1_FRAME_RATE_BASE*396*25 && - frame_rate_tab[s->frame_rate_index] <= MPEG1_FRAME_RATE_BASE*30 && - vbv_buffer_size <= 20 && - v <= 1856000/400 && - s->codec_id == CODEC_ID_MPEG1VIDEO; - - put_bits(&s->pb, 1, constraint_parameter_flag); - - ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix); - ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix); - - if(s->codec_id == CODEC_ID_MPEG2VIDEO){ - put_header(s, EXT_START_CODE); - put_bits(&s->pb, 4, 1); //seq ext - put_bits(&s->pb, 1, 0); //esc - put_bits(&s->pb, 3, 4); //profile - put_bits(&s->pb, 4, 8); //level - put_bits(&s->pb, 1, s->progressive_sequence=1); - put_bits(&s->pb, 2, 1); //chroma format 4:2:0 - put_bits(&s->pb, 2, 0); //horizontal size ext - put_bits(&s->pb, 2, 0); //vertical size ext - put_bits(&s->pb, 12, v>>18); //bitrate ext - put_bits(&s->pb, 1, 1); //marker - put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext - put_bits(&s->pb, 1, s->low_delay); - put_bits(&s->pb, 2, 0); // frame_rate_ext_n - put_bits(&s->pb, 5, 0); // frame_rate_ext_d - } - - put_header(s, GOP_START_CODE); - put_bits(&s->pb, 1, 0); /* do drop frame */ - /* time code : we must convert from the real frame rate to a - fake mpeg frame rate in case of low frame rate */ - fps = frame_rate_tab[s->frame_rate_index]; - time_code = (int64_t)s->fake_picture_number * MPEG1_FRAME_RATE_BASE; - s->gop_picture_number = s->fake_picture_number; - put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24)); - put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60)); - put_bits(&s->pb, 1, 1); - put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60)); - put_bits(&s->pb, 6, (uint32_t)((time_code % fps) / MPEG1_FRAME_RATE_BASE)); - put_bits(&s->pb, 1, 0); /* closed gop */ - put_bits(&s->pb, 1, 0); /* broken link */ - } - - if (s->avctx->frame_rate < (24 * s->avctx->frame_rate_base) && s->picture_number > 0) { - /* insert empty P pictures to slow down to the desired - frame rate. Each fake pictures takes about 20 bytes */ - fps = frame_rate_tab[s->frame_rate_index]; - n = av_rescale((int64_t)s->picture_number * s->avctx->frame_rate_base, fps, s->avctx->frame_rate) / MPEG1_FRAME_RATE_BASE - 1; - while (s->fake_picture_number < n) { - mpeg1_skip_picture(s, s->fake_picture_number - - s->gop_picture_number); - s->fake_picture_number++; - } - - } -} - -static inline void encode_mb_skip_run(MpegEncContext *s, int run){ - while (run >= 33) { - put_bits(&s->pb, 11, 0x008); - run -= 33; - } - put_bits(&s->pb, mbAddrIncrTable[run][1], - mbAddrIncrTable[run][0]); -} - -/* insert a fake P picture */ -static void mpeg1_skip_picture(MpegEncContext *s, int pict_num) -{ - assert(s->codec_id == CODEC_ID_MPEG1VIDEO); // mpeg2 can do these repeat things - - /* mpeg1 picture header */ - put_header(s, PICTURE_START_CODE); - /* temporal reference */ - put_bits(&s->pb, 10, pict_num & 0x3ff); - - put_bits(&s->pb, 3, P_TYPE); - put_bits(&s->pb, 16, 0xffff); /* non constant bit rate */ - - put_bits(&s->pb, 1, 1); /* integer coordinates */ - put_bits(&s->pb, 3, 1); /* forward_f_code */ - - put_bits(&s->pb, 1, 0); /* extra bit picture */ - - /* only one slice */ - put_header(s, SLICE_MIN_START_CODE); - put_bits(&s->pb, 5, 1); /* quantizer scale */ - put_bits(&s->pb, 1, 0); /* slice extra information */ - - encode_mb_skip_run(s, 0); - - /* empty macroblock */ - put_bits(&s->pb, 3, 1); /* motion only */ - - /* zero motion x & y */ - put_bits(&s->pb, 1, 1); - put_bits(&s->pb, 1, 1); - - /* output a number of empty slice */ - encode_mb_skip_run(s, s->mb_width * s->mb_height - 2); - - /* empty macroblock */ - put_bits(&s->pb, 3, 1); /* motion only */ - - /* zero motion x & y */ - put_bits(&s->pb, 1, 1); - put_bits(&s->pb, 1, 1); -} -#endif - -static void common_init(MpegEncContext *s) -{ - s->y_dc_scale_table= - s->c_dc_scale_table= ff_mpeg1_dc_scale_table; -} - -void ff_mpeg1_clean_buffers(MpegEncContext *s){ - s->last_dc[0] = 1 << (7 + s->intra_dc_precision); - s->last_dc[1] = s->last_dc[0]; - s->last_dc[2] = s->last_dc[0]; - memset(s->last_mv, 0, sizeof(s->last_mv)); -} - -#ifdef CONFIG_ENCODERS - -void ff_mpeg1_encode_slice_header(MpegEncContext *s){ - put_header(s, SLICE_MIN_START_CODE + s->mb_y); - put_bits(&s->pb, 5, s->qscale); /* quantizer scale */ - put_bits(&s->pb, 1, 0); /* slice extra information */ -} - -void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number) -{ - mpeg1_encode_sequence_header(s); - - /* mpeg1 picture header */ - put_header(s, PICTURE_START_CODE); - /* temporal reference */ - - // RAL: s->picture_number instead of s->fake_picture_number - put_bits(&s->pb, 10, (s->picture_number - - s->gop_picture_number) & 0x3ff); - s->fake_picture_number++; - - put_bits(&s->pb, 3, s->pict_type); - put_bits(&s->pb, 16, 0xffff); /* non constant bit rate */ - - // RAL: Forward f_code also needed for B frames - if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) { - put_bits(&s->pb, 1, 0); /* half pel coordinates */ - if(s->codec_id == CODEC_ID_MPEG1VIDEO) - put_bits(&s->pb, 3, s->f_code); /* forward_f_code */ - else - put_bits(&s->pb, 3, 7); /* forward_f_code */ - } - - // RAL: Backward f_code necessary for B frames - if (s->pict_type == B_TYPE) { - put_bits(&s->pb, 1, 0); /* half pel coordinates */ - if(s->codec_id == CODEC_ID_MPEG1VIDEO) - put_bits(&s->pb, 3, s->b_code); /* backward_f_code */ - else - put_bits(&s->pb, 3, 7); /* backward_f_code */ - } - - put_bits(&s->pb, 1, 0); /* extra bit picture */ - - if(s->codec_id == CODEC_ID_MPEG2VIDEO){ - put_header(s, EXT_START_CODE); - put_bits(&s->pb, 4, 8); //pic ext - if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) { - put_bits(&s->pb, 4, s->f_code); - put_bits(&s->pb, 4, s->f_code); - }else{ - put_bits(&s->pb, 8, 255); - } - if (s->pict_type == B_TYPE) { - put_bits(&s->pb, 4, s->b_code); - put_bits(&s->pb, 4, s->b_code); - }else{ - put_bits(&s->pb, 8, 255); - } - put_bits(&s->pb, 2, s->intra_dc_precision); - put_bits(&s->pb, 2, s->picture_structure= PICT_FRAME); - put_bits(&s->pb, 1, s->top_field_first); - put_bits(&s->pb, 1, s->frame_pred_frame_dct= 1); - put_bits(&s->pb, 1, s->concealment_motion_vectors); - put_bits(&s->pb, 1, s->q_scale_type); - put_bits(&s->pb, 1, s->intra_vlc_format); - put_bits(&s->pb, 1, s->alternate_scan); - put_bits(&s->pb, 1, s->repeat_first_field); - put_bits(&s->pb, 1, s->chroma_420_type=1); - put_bits(&s->pb, 1, s->progressive_frame=1); - put_bits(&s->pb, 1, 0); //composite_display_flag - } - - s->mb_y=0; - ff_mpeg1_encode_slice_header(s); -} - -void mpeg1_encode_mb(MpegEncContext *s, - DCTELEM block[6][64], - int motion_x, int motion_y) -{ - int i, cbp; - const int mb_x = s->mb_x; - const int mb_y = s->mb_y; - const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y; - - /* compute cbp */ - cbp = 0; - for(i=0;i<6;i++) { - if (s->block_last_index[i] >= 0) - cbp |= 1 << (5 - i); - } - - if (cbp == 0 && !first_mb && (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) && - ((s->pict_type == P_TYPE && (motion_x | motion_y) == 0) || - (s->pict_type == B_TYPE && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) | - ((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) { - s->mb_skip_run++; - s->qscale -= s->dquant; - s->skip_count++; - s->misc_bits++; - s->last_bits++; - } else { - if(first_mb){ - assert(s->mb_skip_run == 0); - encode_mb_skip_run(s, s->mb_x); - }else{ - encode_mb_skip_run(s, s->mb_skip_run); - } - - if (s->pict_type == I_TYPE) { - if(s->dquant && cbp){ - put_bits(&s->pb, 2, 1); /* macroblock_type : macroblock_quant = 1 */ - put_bits(&s->pb, 5, s->qscale); - }else{ - put_bits(&s->pb, 1, 1); /* macroblock_type : macroblock_quant = 0 */ - s->qscale -= s->dquant; - } - s->misc_bits+= get_bits_diff(s); - s->i_count++; - } else if (s->mb_intra) { - if(s->dquant && cbp){ - put_bits(&s->pb, 6, 0x01); - put_bits(&s->pb, 5, s->qscale); - }else{ - put_bits(&s->pb, 5, 0x03); - s->qscale -= s->dquant; - } - s->misc_bits+= get_bits_diff(s); - s->i_count++; - s->last_mv[0][0][0] = - s->last_mv[0][0][1] = 0; - } else if (s->pict_type == P_TYPE) { - if (cbp != 0) { - if (motion_x == 0 && motion_y == 0) { - if(s->dquant){ - put_bits(&s->pb, 5, 1); /* macroblock_pattern & quant */ - put_bits(&s->pb, 5, s->qscale); - }else{ - put_bits(&s->pb, 2, 1); /* macroblock_pattern only */ - } - s->misc_bits+= get_bits_diff(s); - put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]); - } else { - if(s->dquant){ - put_bits(&s->pb, 5, 2); /* motion + cbp */ - put_bits(&s->pb, 5, s->qscale); - }else{ - put_bits(&s->pb, 1, 1); /* motion + cbp */ - } - s->misc_bits+= get_bits_diff(s); - mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added - mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added - s->mv_bits+= get_bits_diff(s); - put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]); - } - } else { - put_bits(&s->pb, 3, 1); /* motion only */ - mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added - mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added - s->qscale -= s->dquant; - s->mv_bits+= get_bits_diff(s); - } - s->f_count++; - } else - { // RAL: All the following bloc added for B frames: - if (cbp != 0) - { // With coded bloc pattern - if (s->mv_dir == (MV_DIR_FORWARD | MV_DIR_BACKWARD)) - { // Bi-directional motion - if (s->dquant) - { // With QScale - put_bits(&s->pb, 5, 2); - put_bits(&s->pb, 5, s->qscale); - } - else // Without QScale - put_bits(&s->pb, 2, 3); - s->misc_bits += get_bits_diff(s); - mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code); - mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code); - mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code); - mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code); - s->b_count++; - s->f_count++; - s->mv_bits += get_bits_diff(s); - put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]); - } - else if (s->mv_dir == MV_DIR_BACKWARD) - { // Backward motion - if (s->dquant) - { // With QScale - put_bits(&s->pb, 6, 2); - put_bits(&s->pb, 5, s->qscale); - } - else // Without QScale - put_bits(&s->pb, 3, 3); - s->misc_bits += get_bits_diff(s); - mpeg1_encode_motion(s, motion_x - s->last_mv[1][0][0], s->b_code); - mpeg1_encode_motion(s, motion_y - s->last_mv[1][0][1], s->b_code); - s->b_count++; - s->mv_bits += get_bits_diff(s); - put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]); - } - else if (s->mv_dir == MV_DIR_FORWARD) - { // Forward motion - if (s->dquant) - { // With QScale - put_bits(&s->pb, 6, 3); - put_bits(&s->pb, 5, s->qscale); - } - else // Without QScale - put_bits(&s->pb, 4, 3); - s->misc_bits += get_bits_diff(s); - mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); - mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); - s->f_count++; - s->mv_bits += get_bits_diff(s); - put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]); - } - } - else - { // No coded bloc pattern - if (s->mv_dir == (MV_DIR_FORWARD | MV_DIR_BACKWARD)) - { // Bi-directional motion - put_bits(&s->pb, 2, 2); /* backward & forward motion */ - mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code); - mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code); - mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code); - mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code); - s->b_count++; - s->f_count++; - } - else if (s->mv_dir == MV_DIR_BACKWARD) - { // Backward motion - put_bits(&s->pb, 3, 2); /* backward motion only */ - mpeg1_encode_motion(s, motion_x - s->last_mv[1][0][0], s->b_code); - mpeg1_encode_motion(s, motion_y - s->last_mv[1][0][1], s->b_code); - s->b_count++; - } - else if (s->mv_dir == MV_DIR_FORWARD) - { // Forward motion - put_bits(&s->pb, 4, 2); /* forward motion only */ - mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); - mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); - s->f_count++; - } - s->qscale -= s->dquant; - s->mv_bits += get_bits_diff(s); - } - // End of bloc from RAL - } - for(i=0;i<6;i++) { - if (cbp & (1 << (5 - i))) { - mpeg1_encode_block(s, block[i], i); - } - } - s->mb_skip_run = 0; - if(s->mb_intra) - s->i_tex_bits+= get_bits_diff(s); - else - s->p_tex_bits+= get_bits_diff(s); - } - - // RAL: By this: - if (s->mv_dir & MV_DIR_FORWARD) - { - s->last_mv[0][0][0]= s->mv[0][0][0]; - s->last_mv[0][0][1]= s->mv[0][0][1]; - } - if (s->mv_dir & MV_DIR_BACKWARD) - { - s->last_mv[1][0][0]= s->mv[1][0][0]; - s->last_mv[1][0][1]= s->mv[1][0][1]; - } -} - -// RAL: Parameter added: f_or_b_code -static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code) -{ - int code, bit_size, l, m, bits, range, sign; - - if (val == 0) { - /* zero vector */ - code = 0; - put_bits(&s->pb, - mbMotionVectorTable[0][1], - mbMotionVectorTable[0][0]); - } else { - bit_size = f_or_b_code - 1; - range = 1 << bit_size; - /* modulo encoding */ - l = 16 * range; - m = 2 * l; - if (val < -l) { - val += m; - } else if (val >= l) { - val -= m; - } - - if (val >= 0) { - val--; - code = (val >> bit_size) + 1; - bits = val & (range - 1); - sign = 0; - } else { - val = -val; - val--; - code = (val >> bit_size) + 1; - bits = val & (range - 1); - sign = 1; - } - - assert(code > 0 && code <= 16); - - put_bits(&s->pb, - mbMotionVectorTable[code][1], - mbMotionVectorTable[code][0]); - - put_bits(&s->pb, 1, sign); - if (bit_size > 0) { - put_bits(&s->pb, bit_size, bits); - } - } -} - -void ff_mpeg1_encode_init(MpegEncContext *s) -{ - static int done=0; - - common_init(s); - - if(!done){ - int f_code; - int mv; - int i; - - done=1; - init_rl(&rl_mpeg1); - - for(i=0; i<64; i++) - { - mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i]; - mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i]; - } - - init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_bits, uni_mpeg1_ac_vlc_len); - - /* build unified dc encoding tables */ - for(i=-255; i<256; i++) - { - int adiff, index; - int bits, code; - int diff=i; - - adiff = ABS(diff); - if(diff<0) diff--; - index = vlc_dc_table[adiff]; - - bits= vlc_dc_lum_bits[index] + index; - code= (vlc_dc_lum_code[index]<f_code - 1; - range = 1 << bit_size; - - val=mv; - if (val < 0) - val = -val; - val--; - code = (val >> bit_size) + 1; - if(code<17){ - len= mbMotionVectorTable[code][1] + 1 + bit_size; - }else{ - len= mbMotionVectorTable[16][1] + 2 + bit_size; - } - } - - mv_penalty[f_code][mv+MAX_MV]= len; - } - } - - - for(f_code=MAX_FCODE; f_code>0; f_code--){ - for(mv=-(8<me.mv_penalty= mv_penalty; - s->fcode_tab= fcode_tab; - if(s->codec_id == CODEC_ID_MPEG1VIDEO){ - s->min_qcoeff=-255; - s->max_qcoeff= 255; - }else{ - s->min_qcoeff=-2047; - s->max_qcoeff= 2047; - } - s->intra_ac_vlc_length= - s->inter_ac_vlc_length= uni_mpeg1_ac_vlc_len; -} - -static inline void encode_dc(MpegEncContext *s, int diff, int component) -{ - if (component == 0) { - put_bits( - &s->pb, - mpeg1_lum_dc_uni[diff+255]&0xFF, - mpeg1_lum_dc_uni[diff+255]>>8); - } else { - put_bits( - &s->pb, - mpeg1_chr_dc_uni[diff+255]&0xFF, - mpeg1_chr_dc_uni[diff+255]>>8); - } -} - -static void mpeg1_encode_block(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign; - int code, component; -// RLTable *rl = &rl_mpeg1; - - last_index = s->block_last_index[n]; - - /* DC coef */ - if (s->mb_intra) { - component = (n <= 3 ? 0 : n - 4 + 1); - dc = block[0]; /* overflow is impossible */ - diff = dc - s->last_dc[component]; - encode_dc(s, diff, component); - s->last_dc[component] = dc; - i = 1; -/* - if (s->intra_vlc_format) - rl = &rl_mpeg2; - else - rl = &rl_mpeg1; -*/ - } else { - /* encode the first coefficient : needs to be done here because - it is handled slightly differently */ - level = block[0]; - if (abs(level) == 1) { - code = ((uint32_t)level >> 31); /* the sign bit */ - put_bits(&s->pb, 2, code | 0x02); - i = 1; - } else { - i = 0; - last_non_zero = -1; - goto next_coef; - } - } - - /* now quantify & encode AC coefs */ - last_non_zero = i - 1; - - for(;i<=last_index;i++) { - j = s->intra_scantable.permutated[i]; - level = block[j]; - next_coef: -#if 0 - if (level != 0) - dprintf("level[%d]=%d\n", i, level); -#endif - /* encode using VLC */ - if (level != 0) { - run = i - last_non_zero - 1; - - alevel= level; - MASK_ABS(sign, alevel) - sign&=1; - -// code = get_rl_index(rl, 0, run, alevel); - if (alevel <= mpeg1_max_level[0][run]){ - code= mpeg1_index_run[0][run] + alevel - 1; - /* store the vlc & sign at once */ - put_bits(&s->pb, mpeg1_vlc[code][1]+1, (mpeg1_vlc[code][0]<<1) + sign); - } else { - /* escape seems to be pretty rare <5% so i dont optimize it */ - put_bits(&s->pb, mpeg1_vlc[111/*rl->n*/][1], mpeg1_vlc[111/*rl->n*/][0]); - /* escape: only clip in this case */ - put_bits(&s->pb, 6, run); - if(s->codec_id == CODEC_ID_MPEG1VIDEO){ - if (alevel < 128) { - put_bits(&s->pb, 8, level & 0xff); - } else { - if (level < 0) { - put_bits(&s->pb, 16, 0x8001 + level + 255); - } else { - put_bits(&s->pb, 16, level & 0xffff); - } - } - }else{ - put_bits(&s->pb, 12, level & 0xfff); - } - } - last_non_zero = i; - } - } - /* end of block */ - put_bits(&s->pb, 2, 0x2); -} -#endif //CONFIG_ENCODERS - -/******************************************/ -/* decoding */ - -static VLC dc_lum_vlc; -static VLC dc_chroma_vlc; -static VLC mv_vlc; -static VLC mbincr_vlc; -static VLC mb_ptype_vlc; -static VLC mb_btype_vlc; -static VLC mb_pat_vlc; - -static void init_vlcs() -{ - static int done = 0; - - if (!done) { - done = 1; - - init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12, - vlc_dc_lum_bits, 1, 1, - vlc_dc_lum_code, 2, 2); - init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12, - vlc_dc_chroma_bits, 1, 1, - vlc_dc_chroma_code, 2, 2); - init_vlc(&mv_vlc, MV_VLC_BITS, 17, - &mbMotionVectorTable[0][1], 2, 1, - &mbMotionVectorTable[0][0], 2, 1); - init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36, - &mbAddrIncrTable[0][1], 2, 1, - &mbAddrIncrTable[0][0], 2, 1); - init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 63, - &mbPatTable[0][1], 2, 1, - &mbPatTable[0][0], 2, 1); - - init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7, - &table_mb_ptype[0][1], 2, 1, - &table_mb_ptype[0][0], 2, 1); - init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11, - &table_mb_btype[0][1], 2, 1, - &table_mb_btype[0][0], 2, 1); - init_rl(&rl_mpeg1); - init_rl(&rl_mpeg2); - - init_2d_vlc_rl(&rl_mpeg1); - init_2d_vlc_rl(&rl_mpeg2); - } -} - -static inline int get_dmv(MpegEncContext *s) -{ - if(get_bits1(&s->gb)) - return 1 - (get_bits1(&s->gb) << 1); - else - return 0; -} - -static inline int get_qscale(MpegEncContext *s) -{ - int qscale = get_bits(&s->gb, 5); - if (s->codec_id == CODEC_ID_MPEG2VIDEO) { - if (s->q_scale_type) { - return non_linear_qscale[qscale]; - } else { - return qscale << 1; - } - } - return qscale; -} - -/* motion type (for mpeg2) */ -#define MT_FIELD 1 -#define MT_FRAME 2 -#define MT_16X8 2 -#define MT_DMV 3 - -static int mpeg_decode_mb(MpegEncContext *s, - DCTELEM block[6][64]) -{ - int i, j, k, cbp, val, mb_type, motion_type; - - dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y); - - assert(s->mb_skiped==0); - - if (s->mb_skip_run-- != 0) { - if(s->pict_type == I_TYPE){ - fprintf(stderr, "skiped MB in I frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - /* skip mb */ - s->mb_intra = 0; - for(i=0;i<6;i++) - s->block_last_index[i] = -1; - s->mv_type = MV_TYPE_16X16; - if (s->pict_type == P_TYPE) { - /* if P type, zero motion vector is implied */ - s->mv_dir = MV_DIR_FORWARD; - s->mv[0][0][0] = s->mv[0][0][1] = 0; - s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0; - s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0; - s->mb_skiped = 1; - s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; - } else { - /* if B type, reuse previous vectors and directions */ - s->mv[0][0][0] = s->last_mv[0][0][0]; - s->mv[0][0][1] = s->last_mv[0][0][1]; - s->mv[1][0][0] = s->last_mv[1][0][0]; - s->mv[1][0][1] = s->last_mv[1][0][1]; - - s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= - s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1] | MB_TYPE_SKIP; -// assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8)); - - if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0) - s->mb_skiped = 1; - } - - return 0; - } - - switch(s->pict_type) { - default: - case I_TYPE: - if (get_bits1(&s->gb) == 0) { - if (get_bits1(&s->gb) == 0){ - fprintf(stderr, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA; - } else { - mb_type = MB_TYPE_INTRA; - } - break; - case P_TYPE: - mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1); - if (mb_type < 0){ - fprintf(stderr, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - mb_type = ptype2mb_type[ mb_type ]; - break; - case B_TYPE: - mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1); - if (mb_type < 0){ - fprintf(stderr, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - mb_type = btype2mb_type[ mb_type ]; - break; - } - dprintf("mb_type=%x\n", mb_type); -// motion_type = 0; /* avoid warning */ - if (IS_INTRA(mb_type)) { - /* compute dct type */ - if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var? - !s->frame_pred_frame_dct) { - s->interlaced_dct = get_bits1(&s->gb); - } - - if (IS_QUANT(mb_type)) - s->qscale = get_qscale(s); - - if (s->concealment_motion_vectors) { - /* just parse them */ - if (s->picture_structure != PICT_FRAME) - skip_bits1(&s->gb); /* field select */ - - s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] = - mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]); - s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] = - mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]); - - skip_bits1(&s->gb); /* marker */ - }else - memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */ - s->mb_intra = 1; - - if (s->codec_id == CODEC_ID_MPEG2VIDEO) { - for(i=0;i<6;i++) { - if (mpeg2_decode_block_intra(s, block[i], i) < 0) - return -1; - } - } else { - for(i=0;i<6;i++) { - if (mpeg1_decode_block_intra(s, block[i], i) < 0) - return -1; - } - } - } else { - if (mb_type & MB_TYPE_ZERO_MV){ - assert(mb_type & MB_TYPE_PAT); - - /* compute dct type */ - if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var? - !s->frame_pred_frame_dct) { - s->interlaced_dct = get_bits1(&s->gb); - } - - if (IS_QUANT(mb_type)) - s->qscale = get_qscale(s); - - s->mv_dir = MV_DIR_FORWARD; - s->mv_type = MV_TYPE_16X16; - s->last_mv[0][0][0] = 0; - s->last_mv[0][0][1] = 0; - s->last_mv[0][1][0] = 0; - s->last_mv[0][1][1] = 0; - s->mv[0][0][0] = 0; - s->mv[0][0][1] = 0; - }else{ - assert(mb_type & MB_TYPE_L0L1); -//FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED - /* get additionnal motion vector type */ - if (s->frame_pred_frame_dct) - motion_type = MT_FRAME; - else{ - motion_type = get_bits(&s->gb, 2); - } - - /* compute dct type */ - if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var? - !s->frame_pred_frame_dct && IS_PAT(mb_type)) { - s->interlaced_dct = get_bits1(&s->gb); - } - - if (IS_QUANT(mb_type)) - s->qscale = get_qscale(s); - - /* motion vectors */ - s->mv_dir = 0; - for(i=0;i<2;i++) { - if (USES_LIST(mb_type, i)) { - s->mv_dir |= (MV_DIR_FORWARD >> i); - dprintf("motion_type=%d\n", motion_type); - switch(motion_type) { - case MT_FRAME: /* or MT_16X8 */ - if (s->picture_structure == PICT_FRAME) { - /* MT_FRAME */ - mb_type |= MB_TYPE_16x16; - s->mv_type = MV_TYPE_16X16; - s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] = - mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]); - s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] = - mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]); - /* full_pel: only for mpeg1 */ - if (s->full_pel[i]){ - s->mv[i][0][0] <<= 1; - s->mv[i][0][1] <<= 1; - } - } else { - /* MT_16X8 */ - mb_type |= MB_TYPE_16x8; - s->mv_type = MV_TYPE_16X8; - for(j=0;j<2;j++) { - s->field_select[i][j] = get_bits1(&s->gb); - for(k=0;k<2;k++) { - val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], - s->last_mv[i][j][k]); - s->last_mv[i][j][k] = val; - s->mv[i][j][k] = val; - } - } - } - break; - case MT_FIELD: - s->mv_type = MV_TYPE_FIELD; - if (s->picture_structure == PICT_FRAME) { - mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; - for(j=0;j<2;j++) { - s->field_select[i][j] = get_bits1(&s->gb); - val = mpeg_decode_motion(s, s->mpeg_f_code[i][0], - s->last_mv[i][j][0]); - s->last_mv[i][j][0] = val; - s->mv[i][j][0] = val; - dprintf("fmx=%d\n", val); - val = mpeg_decode_motion(s, s->mpeg_f_code[i][1], - s->last_mv[i][j][1] >> 1); - s->last_mv[i][j][1] = val << 1; - s->mv[i][j][1] = val; - dprintf("fmy=%d\n", val); - } - } else { - mb_type |= MB_TYPE_16x16; - s->field_select[i][0] = get_bits1(&s->gb); - for(k=0;k<2;k++) { - val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], - s->last_mv[i][0][k]); - s->last_mv[i][0][k] = val; - s->last_mv[i][1][k] = val; - s->mv[i][0][k] = val; - } - } - break; - case MT_DMV: - { - int dmx, dmy, mx, my, m; - - mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0], - s->last_mv[i][0][0]); - s->last_mv[i][0][0] = mx; - s->last_mv[i][1][0] = mx; - dmx = get_dmv(s); - my = mpeg_decode_motion(s, s->mpeg_f_code[i][1], - s->last_mv[i][0][1] >> 1); - dmy = get_dmv(s); - s->mv_type = MV_TYPE_DMV; - - - s->last_mv[i][0][1] = my<<1; - s->last_mv[i][1][1] = my<<1; - - s->mv[i][0][0] = mx; - s->mv[i][0][1] = my; - s->mv[i][1][0] = mx;//not used - s->mv[i][1][1] = my;//not used - - if (s->picture_structure == PICT_FRAME) { - mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; - - //m = 1 + 2 * s->top_field_first; - m = s->top_field_first ? 1 : 3; - - /* top -> top pred */ - s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx; - s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1; - m = 4 - m; - s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx; - s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1; - } else { - mb_type |= MB_TYPE_16x16; - - s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx; - s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy; - if(s->picture_structure == PICT_TOP_FIELD) - s->mv[i][2][1]--; - else - s->mv[i][2][1]++; - } - } - break; - } - } - } - } - - s->mb_intra = 0; - - if (IS_PAT(mb_type)) { - cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1); - if (cbp < 0){ - fprintf(stderr, "invalid cbp at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - cbp++; - - if (s->codec_id == CODEC_ID_MPEG2VIDEO) { - for(i=0;i<6;i++) { - if (cbp & 32) { - if (mpeg2_decode_block_non_intra(s, block[i], i) < 0) - return -1; - } else { - s->block_last_index[i] = -1; - } - cbp+=cbp; - } - } else { - for(i=0;i<6;i++) { - if (cbp & 32) { - if (mpeg1_decode_block_inter(s, block[i], i) < 0) - return -1; - } else { - s->block_last_index[i] = -1; - } - cbp+=cbp; - } - } - }else{ - for(i=0;i<6;i++) - s->block_last_index[i] = -1; - } - } - - s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type; - - return 0; -} - -/* as h263, but only 17 codes */ -static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred) -{ - int code, sign, val, l, shift; - - code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2); - if (code == 0) { - return pred; - } - if (code < 0) { - return 0xffff; - } - - sign = get_bits1(&s->gb); - shift = fcode - 1; - val = code; - if (shift) { - val = (val - 1) << shift; - val |= get_bits(&s->gb, shift); - val++; - } - if (sign) - val = -val; - val += pred; - - /* modulo decoding */ - l = 1 << (shift+4); - val = ((val + l)&(l*2-1)) - l; - return val; -} - -static inline int decode_dc(GetBitContext *gb, int component) -{ - int code, diff; - - if (component == 0) { - code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2); - } else { - code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2); - } - if (code < 0){ - fprintf(stderr, "invalid dc code at\n"); - return 0xffff; - } - if (code == 0) { - diff = 0; - } else { - diff = get_xbits(gb, code); - } - return diff; -} - -static inline int mpeg1_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, dc, diff, i, j, run; - int component; - RLTable *rl = &rl_mpeg1; - uint8_t * const scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix= s->intra_matrix; - const int qscale= s->qscale; - - /* DC coef */ - component = (n <= 3 ? 0 : n - 4 + 1); - diff = decode_dc(&s->gb, component); - if (diff >= 0xffff) - return -1; - dc = s->last_dc[component]; - dc += diff; - s->last_dc[component] = dc; - block[0] = dc<<3; - dprintf("dc=%d diff=%d\n", dc, diff); - i = 0; - { - OPEN_READER(re, &s->gb); - /* now quantify & encode AC coefs */ - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2); - - if(level == 127){ - break; - } else if(level != 0) { - i += run; - j = scantable[i]; - level= (level*qscale*quant_matrix[j])>>3; - level= (level-1)|1; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); - if (level == -128) { - level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8); - } else if (level == 0) { - level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8); - } - i += run; - j = scantable[i]; - if(level<0){ - level= -level; - level= (level*qscale*quant_matrix[j])>>3; - level= (level-1)|1; - level= -level; - }else{ - level= (level*qscale*quant_matrix[j])>>3; - level= (level-1)|1; - } - } - if (i > 63){ - fprintf(stderr, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - block[j] = level; - } - CLOSE_READER(re, &s->gb); - } - s->block_last_index[n] = i; - return 0; -} - -static inline int mpeg1_decode_block_inter(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, i, j, run; - RLTable *rl = &rl_mpeg1; - uint8_t * const scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix= s->inter_matrix; - const int qscale= s->qscale; - - { - int v; - OPEN_READER(re, &s->gb); - i = -1; - /* special case for the first coef. no need to add a second vlc table */ - UPDATE_CACHE(re, &s->gb); - v= SHOW_UBITS(re, &s->gb, 2); - if (v & 2) { - LAST_SKIP_BITS(re, &s->gb, 2); - level= (3*qscale*quant_matrix[0])>>4; - level= (level-1)|1; - if(v&1) - level= -level; - block[0] = level; - i++; - } - - /* now quantify & encode AC coefs */ - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2); - - if(level == 127){ - break; - } else if(level != 0) { - i += run; - j = scantable[i]; - level= ((level*2+1)*qscale*quant_matrix[j])>>4; - level= (level-1)|1; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); - if (level == -128) { - level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8); - } else if (level == 0) { - level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8); - } - i += run; - j = scantable[i]; - if(level<0){ - level= -level; - level= ((level*2+1)*qscale*quant_matrix[j])>>4; - level= (level-1)|1; - level= -level; - }else{ - level= ((level*2+1)*qscale*quant_matrix[j])>>4; - level= (level-1)|1; - } - } - if (i > 63){ - fprintf(stderr, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - block[j] = level; - } - CLOSE_READER(re, &s->gb); - } - s->block_last_index[n] = i; - return 0; -} - -/* Also does unquantization here, since I will never support mpeg2 - encoding */ -static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, i, j, run; - RLTable *rl = &rl_mpeg1; - uint8_t * const scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix; - const int qscale= s->qscale; - int mismatch; - - mismatch = 1; - - { - int v; - OPEN_READER(re, &s->gb); - i = -1; - if (n < 4) - quant_matrix = s->inter_matrix; - else - quant_matrix = s->chroma_inter_matrix; - - /* special case for the first coef. no need to add a second vlc table */ - UPDATE_CACHE(re, &s->gb); - v= SHOW_UBITS(re, &s->gb, 2); - if (v & 2) { - LAST_SKIP_BITS(re, &s->gb, 2); - level= (3*qscale*quant_matrix[0])>>5; - if(v&1) - level= -level; - block[0] = level; - mismatch ^= level; - i++; - } - - /* now quantify & encode AC coefs */ - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2); - - if(level == 127){ - break; - } else if(level != 0) { - i += run; - j = scantable[i]; - level= ((level*2+1)*qscale*quant_matrix[j])>>5; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); - - i += run; - j = scantable[i]; - if(level<0){ - level= ((-level*2+1)*qscale*quant_matrix[j])>>5; - level= -level; - }else{ - level= ((level*2+1)*qscale*quant_matrix[j])>>5; - } - } - if (i > 63){ - fprintf(stderr, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - mismatch ^= level; - block[j] = level; - } - CLOSE_READER(re, &s->gb); - } - block[63] ^= (mismatch & 1); - - s->block_last_index[n] = i; - return 0; -} - -static inline int mpeg2_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, dc, diff, i, j, run; - int component; - RLTable *rl; - uint8_t * const scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix; - const int qscale= s->qscale; - int mismatch; - - /* DC coef */ - if (n < 4){ - quant_matrix = s->intra_matrix; - component = 0; - }else{ - quant_matrix = s->chroma_intra_matrix; - component = n - 3; - } - diff = decode_dc(&s->gb, component); - if (diff >= 0xffff) - return -1; - dc = s->last_dc[component]; - dc += diff; - s->last_dc[component] = dc; - block[0] = dc << (3 - s->intra_dc_precision); - dprintf("dc=%d\n", block[0]); - mismatch = block[0] ^ 1; - i = 0; - if (s->intra_vlc_format) - rl = &rl_mpeg2; - else - rl = &rl_mpeg1; - - { - OPEN_READER(re, &s->gb); - /* now quantify & encode AC coefs */ - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2); - - if(level == 127){ - break; - } else if(level != 0) { - i += run; - j = scantable[i]; - level= (level*qscale*quant_matrix[j])>>4; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); - i += run; - j = scantable[i]; - if(level<0){ - level= (-level*qscale*quant_matrix[j])>>4; - level= -level; - }else{ - level= (level*qscale*quant_matrix[j])>>4; - } - } - if (i > 63){ - fprintf(stderr, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - mismatch^= level; - block[j] = level; - } - CLOSE_READER(re, &s->gb); - } - block[63]^= mismatch&1; - - s->block_last_index[n] = i; - return 0; -} - -typedef struct Mpeg1Context { - MpegEncContext mpeg_enc_ctx; - int mpeg_enc_ctx_allocated; /* true if decoding context allocated */ - int repeat_field; /* true if we must repeat the field */ -} Mpeg1Context; - -static int mpeg_decode_init(AVCodecContext *avctx) -{ - Mpeg1Context *s = avctx->priv_data; - - s->mpeg_enc_ctx.flags= avctx->flags; - common_init(&s->mpeg_enc_ctx); - init_vlcs(); - - s->mpeg_enc_ctx_allocated = 0; - s->mpeg_enc_ctx.picture_number = 0; - s->repeat_field = 0; - s->mpeg_enc_ctx.codec_id= avctx->codec->id; - return 0; -} - -/* return the 8 bit start code value and update the search - state. Return -1 if no start code found */ -static int find_start_code(uint8_t **pbuf_ptr, uint8_t *buf_end) -{ - uint8_t *buf_ptr; - unsigned int state=0xFFFFFFFF, v; - int val; - - buf_ptr = *pbuf_ptr; - while (buf_ptr < buf_end) { - v = *buf_ptr++; - if (state == 0x000001) { - state = ((state << 8) | v) & 0xffffff; - val = state; - goto found; - } - state = ((state << 8) | v) & 0xffffff; - } - val = -1; - found: - *pbuf_ptr = buf_ptr; - return val; -} - -static int mpeg1_decode_picture(AVCodecContext *avctx, - uint8_t *buf, int buf_size) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int ref, f_code; - - init_get_bits(&s->gb, buf, buf_size*8); - - ref = get_bits(&s->gb, 10); /* temporal ref */ - s->pict_type = get_bits(&s->gb, 3); - dprintf("pict_type=%d number=%d\n", s->pict_type, s->picture_number); - - skip_bits(&s->gb, 16); - if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) { - s->full_pel[0] = get_bits1(&s->gb); - f_code = get_bits(&s->gb, 3); - if (f_code == 0) - return -1; - s->mpeg_f_code[0][0] = f_code; - s->mpeg_f_code[0][1] = f_code; - } - if (s->pict_type == B_TYPE) { - s->full_pel[1] = get_bits1(&s->gb); - f_code = get_bits(&s->gb, 3); - if (f_code == 0) - return -1; - s->mpeg_f_code[1][0] = f_code; - s->mpeg_f_code[1][1] = f_code; - } - s->current_picture.pict_type= s->pict_type; - s->current_picture.key_frame= s->pict_type == I_TYPE; - - s->y_dc_scale = 8; - s->c_dc_scale = 8; - s->first_slice = 1; - return 0; -} - -static void mpeg_decode_sequence_extension(MpegEncContext *s) -{ - int horiz_size_ext, vert_size_ext; - int bit_rate_ext, vbv_buf_ext; - int frame_rate_ext_n, frame_rate_ext_d; - int level, profile; - float aspect; - - skip_bits(&s->gb, 1); /* profil and level esc*/ - profile= get_bits(&s->gb, 3); - level= get_bits(&s->gb, 4); - s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */ - skip_bits(&s->gb, 2); /* chroma_format */ - horiz_size_ext = get_bits(&s->gb, 2); - vert_size_ext = get_bits(&s->gb, 2); - s->width |= (horiz_size_ext << 12); - s->height |= (vert_size_ext << 12); - bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */ - s->bit_rate = ((s->bit_rate / 400) | (bit_rate_ext << 12)) * 400; - skip_bits1(&s->gb); /* marker */ - vbv_buf_ext = get_bits(&s->gb, 8); - - s->low_delay = get_bits1(&s->gb); - if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1; - - frame_rate_ext_n = get_bits(&s->gb, 2); - frame_rate_ext_d = get_bits(&s->gb, 5); - av_reduce( - &s->avctx->frame_rate, - &s->avctx->frame_rate_base, - frame_rate_tab[s->frame_rate_index] * (frame_rate_ext_n+1), - MPEG1_FRAME_RATE_BASE * (frame_rate_ext_d+1), - 1<<30); - - dprintf("sequence extension\n"); - s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO; - s->avctx->sub_id = 2; /* indicates mpeg2 found */ - - aspect= mpeg2_aspect[s->aspect_ratio_info]; - if(aspect>0.0) s->avctx->aspect_ratio= s->width/(aspect*s->height); - else if(aspect<0.0) s->avctx->aspect_ratio= -1.0/aspect; - - if(s->avctx->debug & FF_DEBUG_PICT_INFO) - printf("profile: %d, level: %d \n", profile, level); -} - -static void mpeg_decode_quant_matrix_extension(MpegEncContext *s) -{ - int i, v, j; - - dprintf("matrix extension\n"); - - if (get_bits1(&s->gb)) { - for(i=0;i<64;i++) { - v = get_bits(&s->gb, 8); - j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->intra_matrix[j] = v; - s->chroma_intra_matrix[j] = v; - } - } - if (get_bits1(&s->gb)) { - for(i=0;i<64;i++) { - v = get_bits(&s->gb, 8); - j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->inter_matrix[j] = v; - s->chroma_inter_matrix[j] = v; - } - } - if (get_bits1(&s->gb)) { - for(i=0;i<64;i++) { - v = get_bits(&s->gb, 8); - j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->chroma_intra_matrix[j] = v; - } - } - if (get_bits1(&s->gb)) { - for(i=0;i<64;i++) { - v = get_bits(&s->gb, 8); - j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->chroma_inter_matrix[j] = v; - } - } -} - -static void mpeg_decode_picture_coding_extension(MpegEncContext *s) -{ - s->full_pel[0] = s->full_pel[1] = 0; - s->mpeg_f_code[0][0] = get_bits(&s->gb, 4); - s->mpeg_f_code[0][1] = get_bits(&s->gb, 4); - s->mpeg_f_code[1][0] = get_bits(&s->gb, 4); - s->mpeg_f_code[1][1] = get_bits(&s->gb, 4); - s->intra_dc_precision = get_bits(&s->gb, 2); - s->picture_structure = get_bits(&s->gb, 2); - s->top_field_first = get_bits1(&s->gb); - s->frame_pred_frame_dct = get_bits1(&s->gb); - s->concealment_motion_vectors = get_bits1(&s->gb); - s->q_scale_type = get_bits1(&s->gb); - s->intra_vlc_format = get_bits1(&s->gb); - s->alternate_scan = get_bits1(&s->gb); - s->repeat_first_field = get_bits1(&s->gb); - s->chroma_420_type = get_bits1(&s->gb); - s->progressive_frame = get_bits1(&s->gb); - - if(s->picture_structure == PICT_FRAME) - s->first_field=0; - else{ - s->first_field ^= 1; - memset(s->mbskip_table, 0, s->mb_stride*s->mb_height); - } - - if(s->alternate_scan){ - ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan); - }else{ - ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan); - } - - /* composite display not parsed */ - dprintf("intra_dc_precision=%d\n", s->intra_dc_precision); - dprintf("picture_structure=%d\n", s->picture_structure); - dprintf("top field first=%d\n", s->top_field_first); - dprintf("repeat first field=%d\n", s->repeat_first_field); - dprintf("conceal=%d\n", s->concealment_motion_vectors); - dprintf("intra_vlc_format=%d\n", s->intra_vlc_format); - dprintf("alternate_scan=%d\n", s->alternate_scan); - dprintf("frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct); - dprintf("progressive_frame=%d\n", s->progressive_frame); -} - -static void mpeg_decode_extension(AVCodecContext *avctx, - uint8_t *buf, int buf_size) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int ext_type; - - init_get_bits(&s->gb, buf, buf_size*8); - - ext_type = get_bits(&s->gb, 4); - switch(ext_type) { - case 0x1: - /* sequence ext */ - mpeg_decode_sequence_extension(s); - break; - case 0x3: - /* quant matrix extension */ - mpeg_decode_quant_matrix_extension(s); - break; - case 0x8: - /* picture extension */ - mpeg_decode_picture_coding_extension(s); - break; - } -} - -static void exchange_uv(AVFrame *f){ - uint8_t *t= f->data[1]; - f->data[1]= f->data[2]; - f->data[2]= t; -} - -#define DECODE_SLICE_FATAL_ERROR -2 -#define DECODE_SLICE_ERROR -1 -#define DECODE_SLICE_OK 0 - -/** - * decodes a slice. - * @return DECODE_SLICE_FATAL_ERROR if a non recoverable error occured
- * DECODE_SLICE_ERROR if the slice is damaged
- * DECODE_SLICE_OK if this slice is ok
- */ -static int mpeg_decode_slice(AVCodecContext *avctx, - AVFrame *pict, - int start_code, - uint8_t **buf, int buf_size) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int ret; - const int field_pic= s->picture_structure != PICT_FRAME; - - s->resync_mb_x= s->mb_x = - s->resync_mb_y= s->mb_y = -1; - - start_code = (start_code - 1) & 0xff; - if (start_code >= s->mb_height){ - fprintf(stderr, "slice below image (%d >= %d)\n", start_code, s->mb_height); - return -1; - } - - ff_mpeg1_clean_buffers(s); - s->interlaced_dct = 0; - - /* start frame decoding */ - if (s->first_slice) { - if(s->first_field || s->picture_structure==PICT_FRAME){ - if(MPV_frame_start(s, avctx) < 0) - return DECODE_SLICE_FATAL_ERROR; - - ff_er_frame_start(s); - - /* first check if we must repeat the frame */ - s->current_picture_ptr->repeat_pict = 0; - if (s->repeat_first_field) { - if (s->progressive_sequence) { - if (s->top_field_first) - s->current_picture_ptr->repeat_pict = 4; - else - s->current_picture_ptr->repeat_pict = 2; - } else if (s->progressive_frame) { - s->current_picture_ptr->repeat_pict = 1; - } - } - //printf("%d\n", s->current_picture_ptr->repeat_pict); - - if(s->avctx->debug&FF_DEBUG_PICT_INFO){ - printf("qp:%d fc:%2d%2d%2d%2d %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n", - s->qscale, s->mpeg_f_code[0][0],s->mpeg_f_code[0][1],s->mpeg_f_code[1][0],s->mpeg_f_code[1][1], - s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")), - s->progressive_sequence ? "pro" :"", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"", - s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors, - s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :""); - } - }else{ //second field - int i; - - if(!s->current_picture_ptr){ - fprintf(stderr, "first field missing\n"); - return -1; - } - - for(i=0; i<4; i++){ - s->current_picture.data[i] = s->current_picture_ptr->data[i]; - if(s->picture_structure == PICT_BOTTOM_FIELD){ - s->current_picture.data[i] += s->current_picture_ptr->linesize[i]; - } - } - } -#ifdef HAVE_XVMC -// MPV_frame_start will call this function too, -// but we need to call it on every field - if(s->avctx->xvmc_acceleration) - XVMC_field_start(s,avctx); -#endif - }//fi(s->first_slice) - s->first_slice = 0; - - init_get_bits(&s->gb, *buf, buf_size*8); - - s->qscale = get_qscale(s); - if(s->qscale == 0){ - fprintf(stderr, "qscale == 0\n"); - return -1; - } - - /* extra slice info */ - while (get_bits1(&s->gb) != 0) { - skip_bits(&s->gb, 8); - } - - s->mb_x=0; - - for(;;) { - int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2); - if (code < 0){ - fprintf(stderr, "first mb_incr damaged\n"); - return -1; - } - if (code >= 33) { - if (code == 33) { - s->mb_x += 33; - } - /* otherwise, stuffing, nothing to do */ - } else { - s->mb_x += code; - break; - } - } - - s->resync_mb_x= s->mb_x; - s->resync_mb_y= s->mb_y = start_code; - s->mb_skip_run= 0; - ff_init_block_index(s); - - for(;;) { - s->dsp.clear_blocks(s->block[0]); - - ret = mpeg_decode_mb(s, s->block); - - dprintf("ret=%d\n", ret); - if (ret < 0) - return -1; - - if(s->motion_val && s->pict_type != B_TYPE){ //note motion_val is normally NULL unless we want to extract the MVs - const int wrap = s->block_wrap[0]; - const int xy = s->mb_x*2 + 1 + (s->mb_y*2 +1)*wrap; - int motion_x, motion_y; - - if (s->mb_intra) { - motion_x = motion_y = 0; - }else if (s->mv_type == MV_TYPE_16X16) { - motion_x = s->mv[0][0][0]; - motion_y = s->mv[0][0][1]; - } else /*if (s->mv_type == MV_TYPE_FIELD)*/ { - motion_x = s->mv[0][0][0] + s->mv[0][1][0]; - motion_y = s->mv[0][0][1] + s->mv[0][1][1]; - motion_x = (motion_x>>1) | (motion_x&1); - } - s->motion_val[xy][0] = motion_x; - s->motion_val[xy][1] = motion_y; - s->motion_val[xy + 1][0] = motion_x; - s->motion_val[xy + 1][1] = motion_y; - s->motion_val[xy + wrap][0] = motion_x; - s->motion_val[xy + wrap][1] = motion_y; - s->motion_val[xy + 1 + wrap][0] = motion_x; - s->motion_val[xy + 1 + wrap][1] = motion_y; - } - - s->dest[0] += 16; - s->dest[1] += 8; - s->dest[2] += 8; - - MPV_decode_mb(s, s->block); - - if (++s->mb_x >= s->mb_width) { - if(s->avctx->codec_tag == ff_get_fourcc("VCR2")) - exchange_uv((AVFrame*)s->current_picture_ptr); - - ff_draw_horiz_band(s, 16*s->mb_y, 16); - - if(s->avctx->codec_tag == ff_get_fourcc("VCR2")) - exchange_uv((AVFrame*)s->current_picture_ptr); - - s->mb_x = 0; - s->mb_y++; - - if(s->mb_y<= s->mb_height){ - int left= s->gb.size_in_bits - get_bits_count(&s->gb); - - if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23))) - || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){ - fprintf(stderr, "end missmatch left=%d\n", left); - return -1; - }else - goto eos; - } - - ff_init_block_index(s); - } - - /* skip mb handling */ - if (s->mb_skip_run == -1) { - /* read again increment */ - s->mb_skip_run = 0; - for(;;) { - int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2); - if (code < 0){ - fprintf(stderr, "mb incr damaged\n"); - return -1; - } - if (code >= 33) { - if (code == 33) { - s->mb_skip_run += 33; - }else if(code == 35){ - if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){ - fprintf(stderr, "slice missmatch\n"); - return -1; - } - goto eos; /* end of slice */ - } - /* otherwise, stuffing, nothing to do */ - } else { - s->mb_skip_run += code; - break; - } - } - } - } -eos: // end of slice - *buf += get_bits_count(&s->gb)/8 - 1; -//printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y); - return 0; -} - -/** - * handles slice ends. - * @return 1 if it seems to be the last slice of - */ -static int slice_end(AVCodecContext *avctx, AVFrame *pict) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - - if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr) - return 0; - -#ifdef HAVE_XVMC - if(s->avctx->xvmc_acceleration) - XVMC_field_end(s); -#endif - /* end of slice reached */ - if (/*s->mb_y<mb_height &&*/ !s->first_field) { - /* end of image */ - - if(s->codec_id == CODEC_ID_MPEG2VIDEO){ - s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2; - }else - s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG1; - - ff_er_frame_end(s); - - MPV_frame_end(s); - - if (s->pict_type == B_TYPE || s->low_delay) { - *pict= *(AVFrame*)s->current_picture_ptr; - ff_print_debug_info(s, s->current_picture_ptr); - } else { - s->picture_number++; - /* latency of 1 frame for I and P frames */ - /* XXX: use another variable than picture_number */ - if (s->last_picture_ptr != NULL) { - *pict= *(AVFrame*)s->last_picture_ptr; - ff_print_debug_info(s, s->last_picture_ptr); - } - } - if(s->avctx->codec_tag == ff_get_fourcc("VCR2")) - exchange_uv(pict); - - return 1; - } else { - return 0; - } -} - -static int mpeg1_decode_sequence(AVCodecContext *avctx, - uint8_t *buf, int buf_size) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int width, height, i, v, j; - float aspect; - - init_get_bits(&s->gb, buf, buf_size*8); - - width = get_bits(&s->gb, 12); - height = get_bits(&s->gb, 12); - s->aspect_ratio_info= get_bits(&s->gb, 4); - if(s->codec_id == CODEC_ID_MPEG1VIDEO){ - aspect= mpeg1_aspect[s->aspect_ratio_info]; - if(aspect!=0.0) avctx->aspect_ratio= width/(aspect*height); - } - - s->frame_rate_index = get_bits(&s->gb, 4); - if (s->frame_rate_index == 0) - return -1; - s->bit_rate = get_bits(&s->gb, 18) * 400; - if (get_bits1(&s->gb) == 0) /* marker */ - return -1; - if (width <= 0 || height <= 0 || - (width % 2) != 0 || (height % 2) != 0) - return -1; - if (width != s->width || - height != s->height) { - /* start new mpeg1 context decoding */ - s->out_format = FMT_MPEG1; - if (s1->mpeg_enc_ctx_allocated) { - MPV_common_end(s); - } - s->width = width; - s->height = height; - avctx->has_b_frames= 1; - s->avctx = avctx; - avctx->width = width; - avctx->height = height; - av_reduce( - &avctx->frame_rate, - &avctx->frame_rate_base, - frame_rate_tab[s->frame_rate_index], - MPEG1_FRAME_RATE_BASE, //FIXME store in allready reduced form - 1<<30 - ); - avctx->bit_rate = s->bit_rate; - - //get_format() or set_video(width,height,aspect,pix_fmt); - //until then pix_fmt may be changed right after codec init - if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT ) - avctx->idct_algo = FF_IDCT_SIMPLE; - - if (MPV_common_init(s) < 0) - return -1; - s1->mpeg_enc_ctx_allocated = 1; - } - - skip_bits(&s->gb, 10); /* vbv_buffer_size */ - skip_bits(&s->gb, 1); - - /* get matrix */ - if (get_bits1(&s->gb)) { - for(i=0;i<64;i++) { - v = get_bits(&s->gb, 8); - j = s->intra_scantable.permutated[i]; - s->intra_matrix[j] = v; - s->chroma_intra_matrix[j] = v; - } -#ifdef DEBUG - dprintf("intra matrix present\n"); - for(i=0;i<64;i++) - dprintf(" %d", s->intra_matrix[s->intra_scantable.permutated[i]]); - printf("\n"); -#endif - } else { - for(i=0;i<64;i++) { - int j= s->dsp.idct_permutation[i]; - v = ff_mpeg1_default_intra_matrix[i]; - s->intra_matrix[j] = v; - s->chroma_intra_matrix[j] = v; - } - } - if (get_bits1(&s->gb)) { - for(i=0;i<64;i++) { - v = get_bits(&s->gb, 8); - j = s->intra_scantable.permutated[i]; - s->inter_matrix[j] = v; - s->chroma_inter_matrix[j] = v; - } -#ifdef DEBUG - dprintf("non intra matrix present\n"); - for(i=0;i<64;i++) - dprintf(" %d", s->inter_matrix[s->intra_scantable.permutated[i]]); - printf("\n"); -#endif - } else { - for(i=0;i<64;i++) { - int j= s->dsp.idct_permutation[i]; - v = ff_mpeg1_default_non_intra_matrix[i]; - s->inter_matrix[j] = v; - s->chroma_inter_matrix[j] = v; - } - } - - /* we set mpeg2 parameters so that it emulates mpeg1 */ - s->progressive_sequence = 1; - s->progressive_frame = 1; - s->picture_structure = PICT_FRAME; - s->frame_pred_frame_dct = 1; - s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO; - avctx->sub_id = 1; /* indicates mpeg1 */ - return 0; -} - -static int vcr2_init_sequence(AVCodecContext *avctx) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int i, v; - - /* start new mpeg1 context decoding */ - s->out_format = FMT_MPEG1; - if (s1->mpeg_enc_ctx_allocated) { - MPV_common_end(s); - } - s->width = avctx->width; - s->height = avctx->height; - avctx->has_b_frames= 0; //true? - s->low_delay= 1; - s->avctx = avctx; - - //get_format() or set_video(width,height,aspect,pix_fmt); - //until then pix_fmt may be changed right after codec init - if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT ) - avctx->idct_algo = FF_IDCT_SIMPLE; - - if (MPV_common_init(s) < 0) - return -1; - s1->mpeg_enc_ctx_allocated = 1; - - for(i=0;i<64;i++) { - int j= s->dsp.idct_permutation[i]; - v = ff_mpeg1_default_intra_matrix[i]; - s->intra_matrix[j] = v; - s->chroma_intra_matrix[j] = v; - - v = ff_mpeg1_default_non_intra_matrix[i]; - s->inter_matrix[j] = v; - s->chroma_inter_matrix[j] = v; - } - - s->progressive_sequence = 1; - s->progressive_frame = 1; - s->picture_structure = PICT_FRAME; - s->frame_pred_frame_dct = 1; - s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO; - avctx->sub_id = 2; /* indicates mpeg2 */ - return 0; -} - - -static void mpeg_decode_user_data(AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - const uint8_t *p; - int len, flags; - p = buf; - len = buf_size; - - /* we parse the DTG active format information */ - if (len >= 5 && - p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') { - flags = p[4]; - p += 5; - len -= 5; - if (flags & 0x80) { - /* skip event id */ - if (len < 2) - return; - p += 2; - len -= 2; - } - if (flags & 0x40) { - if (len < 1) - return; - avctx->dtg_active_format = p[0] & 0x0f; - } - } -} - -/** - * finds the end of the current frame in the bitstream. - * @return the position of the first byte of the next frame, or -1 - */ -static int mpeg1_find_frame_end(MpegEncContext *s, uint8_t *buf, int buf_size){ - ParseContext *pc= &s->parse_context; - int i; - uint32_t state; - - state= pc->state; - - i=0; - if(!pc->frame_start_found){ - for(i=0; i= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){ - i++; - pc->frame_start_found=1; - break; - } - } - } - - if(pc->frame_start_found){ - for(; i SLICE_MAX_START_CODE){ - pc->frame_start_found=0; - pc->state=-1; - return i-3; - } - } - } - } - pc->state= state; - return END_NOT_FOUND; -} - -/* handle buffering and image synchronisation */ -static int mpeg_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) -{ - Mpeg1Context *s = avctx->priv_data; - uint8_t *buf_end, *buf_ptr; - int ret, start_code, input_size; - AVFrame *picture = data; - MpegEncContext *s2 = &s->mpeg_enc_ctx; - dprintf("fill_buffer\n"); - - *data_size = 0; - - /* special case for last picture */ - if (buf_size == 0 && s2->low_delay==0 && s2->next_picture_ptr) { - *picture= *(AVFrame*)s2->next_picture_ptr; - s2->next_picture_ptr= NULL; - - *data_size = sizeof(AVFrame); - return 0; - } - - if(s2->flags&CODEC_FLAG_TRUNCATED){ - int next= mpeg1_find_frame_end(s2, buf, buf_size); - - if( ff_combine_frame(s2, next, &buf, &buf_size) < 0 ) - return buf_size; - } - - buf_ptr = buf; - buf_end = buf + buf_size; - -#if 0 - if (s->repeat_field % 2 == 1) { - s->repeat_field++; - //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number, - // s2->picture_number, s->repeat_field); - if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) { - *data_size = sizeof(AVPicture); - goto the_end; - } - } -#endif - - if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == ff_get_fourcc("VCR2")) - vcr2_init_sequence(avctx); - - for(;;) { - /* find start next code */ - start_code = find_start_code(&buf_ptr, buf_end); - if (start_code < 0){ - if(s2->pict_type != B_TYPE || avctx->hurry_up==0){ - if (slice_end(avctx, picture)) { - if(s2->last_picture_ptr) //FIXME merge with the stuff in mpeg_decode_slice - *data_size = sizeof(AVPicture); - } - } - return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index); - } - - input_size = buf_end - buf_ptr; - - if(avctx->debug & FF_DEBUG_STARTCODE){ - printf("%3X at %d left %d\n", start_code, buf_ptr-buf, input_size); - } - - /* prepare data for next start code */ - switch(start_code) { - case SEQ_START_CODE: - mpeg1_decode_sequence(avctx, buf_ptr, - input_size); - break; - - case PICTURE_START_CODE: - /* we have a complete image : we try to decompress it */ - mpeg1_decode_picture(avctx, - buf_ptr, input_size); - break; - case EXT_START_CODE: - mpeg_decode_extension(avctx, - buf_ptr, input_size); - break; - case USER_START_CODE: - mpeg_decode_user_data(avctx, - buf_ptr, input_size); - break; - case GOP_START_CODE: - s2->first_field=0; - break; - default: - if (start_code >= SLICE_MIN_START_CODE && - start_code <= SLICE_MAX_START_CODE) { - - /* skip b frames if we dont have reference frames */ - if(s2->last_picture_ptr==NULL && s2->pict_type==B_TYPE) break; - /* skip b frames if we are in a hurry */ - if(avctx->hurry_up && s2->pict_type==B_TYPE) break; - /* skip everything if we are in a hurry>=5 */ - if(avctx->hurry_up>=5) break; - - if (!s->mpeg_enc_ctx_allocated) break; - - ret = mpeg_decode_slice(avctx, picture, - start_code, &buf_ptr, input_size); - emms_c(); - - if(ret < 0){ - if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0) - ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x, s2->mb_y, AC_ERROR|DC_ERROR|MV_ERROR); - if(ret==DECODE_SLICE_FATAL_ERROR) return -1; - }else{ - ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x-1, s2->mb_y, AC_END|DC_END|MV_END); - } - } - break; - } - } -} - -static int mpeg_decode_end(AVCodecContext *avctx) -{ - Mpeg1Context *s = avctx->priv_data; - - if (s->mpeg_enc_ctx_allocated) - MPV_common_end(&s->mpeg_enc_ctx); - return 0; -} - -AVCodec mpeg1video_decoder = { - "mpeg1video", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG1VIDEO, - sizeof(Mpeg1Context), - mpeg_decode_init, - NULL, - mpeg_decode_end, - mpeg_decode_frame, - CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED, - .flush= ff_mpeg_flush, -}; - -AVCodec mpeg2video_decoder = { - "mpeg2video", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG2VIDEO, - sizeof(Mpeg1Context), - mpeg_decode_init, - NULL, - mpeg_decode_end, - mpeg_decode_frame, - CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED, - .flush= ff_mpeg_flush, -}; - -#ifdef HAVE_XVMC -static int mpeg_mc_decode_init(AVCodecContext *avctx){ - Mpeg1Context *s; - - if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) ) - return -1; - if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ) - dprintf("mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n"); - - mpeg_decode_init(avctx); - s = avctx->priv_data; - - avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT; - avctx->xvmc_acceleration = 1; - - return 0; -} - -AVCodec mpeg_xvmc_decoder = { - "mpegvideo_xvmc", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG2VIDEO_XVMC, - sizeof(Mpeg1Context), - mpeg_mc_decode_init, - NULL, - mpeg_decode_end, - mpeg_decode_frame, - CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED, -}; - -#endif - -/* this is ugly i know, but the alternative is too make - hundreds of vars global and prefix them with ff_mpeg1_ - which is far uglier. */ -#include "mdec.c"