| /* |
| * MPEG4 encoder. |
| * Copyright (c) 2000,2001 Fabrice Bellard |
| * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/attributes.h" |
| #include "libavutil/log.h" |
| #include "libavutil/opt.h" |
| #include "mpegutils.h" |
| #include "mpegvideo.h" |
| #include "h263.h" |
| #include "mpeg4video.h" |
| |
| /* The uni_DCtab_* tables below contain unified bits+length tables to encode DC |
| * differences in mpeg4. Unified in the sense that the specification specifies |
| * this encoding in several steps. */ |
| static uint8_t uni_DCtab_lum_len[512]; |
| static uint8_t uni_DCtab_chrom_len[512]; |
| static uint16_t uni_DCtab_lum_bits[512]; |
| static uint16_t uni_DCtab_chrom_bits[512]; |
| |
| /* Unified encoding tables for run length encoding of coefficients. |
| * Unified in the sense that the specification specifies the encoding in several steps. */ |
| static uint32_t uni_mpeg4_intra_rl_bits[64 * 64 * 2 * 2]; |
| static uint8_t uni_mpeg4_intra_rl_len[64 * 64 * 2 * 2]; |
| static uint32_t uni_mpeg4_inter_rl_bits[64 * 64 * 2 * 2]; |
| static uint8_t uni_mpeg4_inter_rl_len[64 * 64 * 2 * 2]; |
| |
| //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 + (run) * 256 + (level)) |
| //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64) |
| #define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level)) |
| |
| /* mpeg4 |
| * inter |
| * max level: 24/6 |
| * max run: 53/63 |
| * |
| * intra |
| * max level: 53/16 |
| * max run: 29/41 |
| */ |
| |
| /** |
| * Return the number of bits that encoding the 8x8 block in block would need. |
| * @param[in] block_last_index last index in scantable order that refers to a non zero element in block. |
| */ |
| static inline int get_block_rate(MpegEncContext *s, int16_t block[64], |
| int block_last_index, uint8_t scantable[64]) |
| { |
| int last = 0; |
| int j; |
| int rate = 0; |
| |
| for (j = 1; j <= block_last_index; j++) { |
| const int index = scantable[j]; |
| int level = block[index]; |
| if (level) { |
| level += 64; |
| if ((level & (~127)) == 0) { |
| if (j < block_last_index) |
| rate += s->intra_ac_vlc_length[UNI_AC_ENC_INDEX(j - last - 1, level)]; |
| else |
| rate += s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j - last - 1, level)]; |
| } else |
| rate += s->ac_esc_length; |
| |
| last = j; |
| } |
| } |
| |
| return rate; |
| } |
| |
| /** |
| * Restore the ac coefficients in block that have been changed by decide_ac_pred(). |
| * This function also restores s->block_last_index. |
| * @param[in,out] block MB coefficients, these will be restored |
| * @param[in] dir ac prediction direction for each 8x8 block |
| * @param[out] st scantable for each 8x8 block |
| * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order |
| */ |
| static inline void restore_ac_coeffs(MpegEncContext *s, int16_t block[6][64], |
| const int dir[6], uint8_t *st[6], |
| const int zigzag_last_index[6]) |
| { |
| int i, n; |
| memcpy(s->block_last_index, zigzag_last_index, sizeof(int) * 6); |
| |
| for (n = 0; n < 6; n++) { |
| int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16; |
| |
| st[n] = s->intra_scantable.permutated; |
| if (dir[n]) { |
| /* top prediction */ |
| for (i = 1; i < 8; i++) |
| block[n][s->idsp.idct_permutation[i]] = ac_val[i + 8]; |
| } else { |
| /* left prediction */ |
| for (i = 1; i < 8; i++) |
| block[n][s->idsp.idct_permutation[i << 3]] = ac_val[i]; |
| } |
| } |
| } |
| |
| /** |
| * Return the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4. |
| * This function will also update s->block_last_index and s->ac_val. |
| * @param[in,out] block MB coefficients, these will be updated if 1 is returned |
| * @param[in] dir ac prediction direction for each 8x8 block |
| * @param[out] st scantable for each 8x8 block |
| * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order |
| */ |
| static inline int decide_ac_pred(MpegEncContext *s, int16_t block[6][64], |
| const int dir[6], uint8_t *st[6], |
| int zigzag_last_index[6]) |
| { |
| int score = 0; |
| int i, n; |
| int8_t *const qscale_table = s->current_picture.qscale_table; |
| |
| memcpy(zigzag_last_index, s->block_last_index, sizeof(int) * 6); |
| |
| for (n = 0; n < 6; n++) { |
| int16_t *ac_val, *ac_val1; |
| |
| score -= get_block_rate(s, block[n], s->block_last_index[n], |
| s->intra_scantable.permutated); |
| |
| ac_val = s->ac_val[0][0] + s->block_index[n] * 16; |
| ac_val1 = ac_val; |
| if (dir[n]) { |
| const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride; |
| /* top prediction */ |
| ac_val -= s->block_wrap[n] * 16; |
| if (s->mb_y == 0 || s->qscale == qscale_table[xy] || n == 2 || n == 3) { |
| /* same qscale */ |
| for (i = 1; i < 8; i++) { |
| const int level = block[n][s->idsp.idct_permutation[i]]; |
| block[n][s->idsp.idct_permutation[i]] = level - ac_val[i + 8]; |
| ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]]; |
| ac_val1[i + 8] = level; |
| } |
| } else { |
| /* different qscale, we must rescale */ |
| for (i = 1; i < 8; i++) { |
| const int level = block[n][s->idsp.idct_permutation[i]]; |
| block[n][s->idsp.idct_permutation[i]] = level - ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale); |
| ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]]; |
| ac_val1[i + 8] = level; |
| } |
| } |
| st[n] = s->intra_h_scantable.permutated; |
| } else { |
| const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride; |
| /* left prediction */ |
| ac_val -= 16; |
| if (s->mb_x == 0 || s->qscale == qscale_table[xy] || n == 1 || n == 3) { |
| /* same qscale */ |
| for (i = 1; i < 8; i++) { |
| const int level = block[n][s->idsp.idct_permutation[i << 3]]; |
| block[n][s->idsp.idct_permutation[i << 3]] = level - ac_val[i]; |
| ac_val1[i] = level; |
| ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]]; |
| } |
| } else { |
| /* different qscale, we must rescale */ |
| for (i = 1; i < 8; i++) { |
| const int level = block[n][s->idsp.idct_permutation[i << 3]]; |
| block[n][s->idsp.idct_permutation[i << 3]] = level - ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale); |
| ac_val1[i] = level; |
| ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]]; |
| } |
| } |
| st[n] = s->intra_v_scantable.permutated; |
| } |
| |
| for (i = 63; i > 0; i--) // FIXME optimize |
| if (block[n][st[n][i]]) |
| break; |
| s->block_last_index[n] = i; |
| |
| score += get_block_rate(s, block[n], s->block_last_index[n], st[n]); |
| } |
| |
| if (score < 0) { |
| return 1; |
| } else { |
| restore_ac_coeffs(s, block, dir, st, zigzag_last_index); |
| return 0; |
| } |
| } |
| |
| /** |
| * modify mb_type & qscale so that encoding is actually possible in mpeg4 |
| */ |
| void ff_clean_mpeg4_qscales(MpegEncContext *s) |
| { |
| int i; |
| int8_t *const qscale_table = s->current_picture.qscale_table; |
| |
| ff_clean_h263_qscales(s); |
| |
| if (s->pict_type == AV_PICTURE_TYPE_B) { |
| int odd = 0; |
| /* ok, come on, this isn't funny anymore, there's more code for |
| * handling this mpeg4 mess than for the actual adaptive quantization */ |
| |
| for (i = 0; i < s->mb_num; i++) { |
| int mb_xy = s->mb_index2xy[i]; |
| odd += qscale_table[mb_xy] & 1; |
| } |
| |
| if (2 * odd > s->mb_num) |
| odd = 1; |
| else |
| odd = 0; |
| |
| for (i = 0; i < s->mb_num; i++) { |
| int mb_xy = s->mb_index2xy[i]; |
| if ((qscale_table[mb_xy] & 1) != odd) |
| qscale_table[mb_xy]++; |
| if (qscale_table[mb_xy] > 31) |
| qscale_table[mb_xy] = 31; |
| } |
| |
| for (i = 1; i < s->mb_num; i++) { |
| int mb_xy = s->mb_index2xy[i]; |
| if (qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i - 1]] && |
| (s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_DIRECT)) { |
| s->mb_type[mb_xy] |= CANDIDATE_MB_TYPE_BIDIR; |
| } |
| } |
| } |
| } |
| |
| /** |
| * Encode the dc value. |
| * @param n block index (0-3 are luma, 4-5 are chroma) |
| */ |
| static inline void mpeg4_encode_dc(PutBitContext *s, int level, int n) |
| { |
| #if 1 |
| /* DC will overflow if level is outside the [-255,255] range. */ |
| level += 256; |
| if (n < 4) { |
| /* luminance */ |
| put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]); |
| } else { |
| /* chrominance */ |
| put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]); |
| } |
| #else |
| int size, v; |
| /* find number of bits */ |
| size = 0; |
| v = abs(level); |
| while (v) { |
| v >>= 1; |
| size++; |
| } |
| |
| if (n < 4) { |
| /* luminance */ |
| put_bits(s, ff_mpeg4_DCtab_lum[size][1], ff_mpeg4_DCtab_lum[size][0]); |
| } else { |
| /* chrominance */ |
| put_bits(s, ff_mpeg4_DCtab_chrom[size][1], ff_mpeg4_DCtab_chrom[size][0]); |
| } |
| |
| /* encode remaining bits */ |
| if (size > 0) { |
| if (level < 0) |
| level = (-level) ^ ((1 << size) - 1); |
| put_bits(s, size, level); |
| if (size > 8) |
| put_bits(s, 1, 1); |
| } |
| #endif |
| } |
| |
| static inline int mpeg4_get_dc_length(int level, int n) |
| { |
| if (n < 4) |
| return uni_DCtab_lum_len[level + 256]; |
| else |
| return uni_DCtab_chrom_len[level + 256]; |
| } |
| |
| /** |
| * Encode an 8x8 block. |
| * @param n block index (0-3 are luma, 4-5 are chroma) |
| */ |
| static inline void mpeg4_encode_block(MpegEncContext *s, |
| int16_t *block, int n, int intra_dc, |
| uint8_t *scan_table, PutBitContext *dc_pb, |
| PutBitContext *ac_pb) |
| { |
| int i, last_non_zero; |
| uint32_t *bits_tab; |
| uint8_t *len_tab; |
| const int last_index = s->block_last_index[n]; |
| |
| if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away |
| /* mpeg4 based DC predictor */ |
| mpeg4_encode_dc(dc_pb, intra_dc, n); |
| if (last_index < 1) |
| return; |
| i = 1; |
| bits_tab = uni_mpeg4_intra_rl_bits; |
| len_tab = uni_mpeg4_intra_rl_len; |
| } else { |
| if (last_index < 0) |
| return; |
| i = 0; |
| bits_tab = uni_mpeg4_inter_rl_bits; |
| len_tab = uni_mpeg4_inter_rl_len; |
| } |
| |
| /* AC coefs */ |
| last_non_zero = i - 1; |
| for (; i < last_index; i++) { |
| int level = block[scan_table[i]]; |
| if (level) { |
| int run = i - last_non_zero - 1; |
| level += 64; |
| if ((level & (~127)) == 0) { |
| const int index = UNI_MPEG4_ENC_INDEX(0, run, level); |
| put_bits(ac_pb, len_tab[index], bits_tab[index]); |
| } else { // ESC3 |
| put_bits(ac_pb, |
| 7 + 2 + 1 + 6 + 1 + 12 + 1, |
| (3 << 23) + (3 << 21) + (0 << 20) + (run << 14) + |
| (1 << 13) + (((level - 64) & 0xfff) << 1) + 1); |
| } |
| last_non_zero = i; |
| } |
| } |
| /* if (i <= last_index) */ { |
| int level = block[scan_table[i]]; |
| int run = i - last_non_zero - 1; |
| level += 64; |
| if ((level & (~127)) == 0) { |
| const int index = UNI_MPEG4_ENC_INDEX(1, run, level); |
| put_bits(ac_pb, len_tab[index], bits_tab[index]); |
| } else { // ESC3 |
| put_bits(ac_pb, |
| 7 + 2 + 1 + 6 + 1 + 12 + 1, |
| (3 << 23) + (3 << 21) + (1 << 20) + (run << 14) + |
| (1 << 13) + (((level - 64) & 0xfff) << 1) + 1); |
| } |
| } |
| } |
| |
| static int mpeg4_get_block_length(MpegEncContext *s, |
| int16_t *block, int n, |
| int intra_dc, uint8_t *scan_table) |
| { |
| int i, last_non_zero; |
| uint8_t *len_tab; |
| const int last_index = s->block_last_index[n]; |
| int len = 0; |
| |
| if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away |
| /* mpeg4 based DC predictor */ |
| len += mpeg4_get_dc_length(intra_dc, n); |
| if (last_index < 1) |
| return len; |
| i = 1; |
| len_tab = uni_mpeg4_intra_rl_len; |
| } else { |
| if (last_index < 0) |
| return 0; |
| i = 0; |
| len_tab = uni_mpeg4_inter_rl_len; |
| } |
| |
| /* AC coefs */ |
| last_non_zero = i - 1; |
| for (; i < last_index; i++) { |
| int level = block[scan_table[i]]; |
| if (level) { |
| int run = i - last_non_zero - 1; |
| level += 64; |
| if ((level & (~127)) == 0) { |
| const int index = UNI_MPEG4_ENC_INDEX(0, run, level); |
| len += len_tab[index]; |
| } else { // ESC3 |
| len += 7 + 2 + 1 + 6 + 1 + 12 + 1; |
| } |
| last_non_zero = i; |
| } |
| } |
| /* if (i <= last_index) */ { |
| int level = block[scan_table[i]]; |
| int run = i - last_non_zero - 1; |
| level += 64; |
| if ((level & (~127)) == 0) { |
| const int index = UNI_MPEG4_ENC_INDEX(1, run, level); |
| len += len_tab[index]; |
| } else { // ESC3 |
| len += 7 + 2 + 1 + 6 + 1 + 12 + 1; |
| } |
| } |
| |
| return len; |
| } |
| |
| static inline void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64], |
| int intra_dc[6], uint8_t **scan_table, |
| PutBitContext *dc_pb, |
| PutBitContext *ac_pb) |
| { |
| int i; |
| |
| if (scan_table) { |
| if (s->avctx->flags2 & AV_CODEC_FLAG2_NO_OUTPUT) { |
| for (i = 0; i < 6; i++) |
| skip_put_bits(&s->pb, |
| mpeg4_get_block_length(s, block[i], i, |
| intra_dc[i], scan_table[i])); |
| } else { |
| /* encode each block */ |
| for (i = 0; i < 6; i++) |
| mpeg4_encode_block(s, block[i], i, |
| intra_dc[i], scan_table[i], dc_pb, ac_pb); |
| } |
| } else { |
| if (s->avctx->flags2 & AV_CODEC_FLAG2_NO_OUTPUT) { |
| for (i = 0; i < 6; i++) |
| skip_put_bits(&s->pb, |
| mpeg4_get_block_length(s, block[i], i, 0, |
| s->intra_scantable.permutated)); |
| } else { |
| /* encode each block */ |
| for (i = 0; i < 6; i++) |
| mpeg4_encode_block(s, block[i], i, 0, |
| s->intra_scantable.permutated, dc_pb, ac_pb); |
| } |
| } |
| } |
| |
| static inline int get_b_cbp(MpegEncContext *s, int16_t block[6][64], |
| int motion_x, int motion_y, int mb_type) |
| { |
| int cbp = 0, i; |
| |
| if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) { |
| int score = 0; |
| const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6); |
| |
| for (i = 0; i < 6; i++) { |
| if (s->coded_score[i] < 0) { |
| score += s->coded_score[i]; |
| cbp |= 1 << (5 - i); |
| } |
| } |
| |
| if (cbp) { |
| int zero_score = -6; |
| if ((motion_x | motion_y | s->dquant | mb_type) == 0) |
| zero_score -= 4; // 2 * MV + mb_type + cbp bit |
| |
| zero_score *= lambda; |
| if (zero_score <= score) |
| cbp = 0; |
| } |
| |
| for (i = 0; i < 6; i++) { |
| if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) { |
| s->block_last_index[i] = -1; |
| s->bdsp.clear_block(s->block[i]); |
| } |
| } |
| } else { |
| for (i = 0; i < 6; i++) { |
| if (s->block_last_index[i] >= 0) |
| cbp |= 1 << (5 - i); |
| } |
| } |
| return cbp; |
| } |
| |
| // FIXME this is duplicated to h263.c |
| static const int dquant_code[5] = { 1, 0, 9, 2, 3 }; |
| |
| void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64], |
| int motion_x, int motion_y) |
| { |
| int cbpc, cbpy, pred_x, pred_y; |
| PutBitContext *const pb2 = s->data_partitioning ? &s->pb2 : &s->pb; |
| PutBitContext *const tex_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb; |
| PutBitContext *const dc_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb; |
| const int interleaved_stats = (s->avctx->flags & AV_CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0; |
| |
| if (!s->mb_intra) { |
| int i, cbp; |
| |
| if (s->pict_type == AV_PICTURE_TYPE_B) { |
| /* convert from mv_dir to type */ |
| static const int mb_type_table[8] = { -1, 3, 2, 1, -1, -1, -1, 0 }; |
| int mb_type = mb_type_table[s->mv_dir]; |
| |
| if (s->mb_x == 0) { |
| for (i = 0; i < 2; i++) |
| s->last_mv[i][0][0] = |
| s->last_mv[i][0][1] = |
| s->last_mv[i][1][0] = |
| s->last_mv[i][1][1] = 0; |
| } |
| |
| av_assert2(s->dquant >= -2 && s->dquant <= 2); |
| av_assert2((s->dquant & 1) == 0); |
| av_assert2(mb_type >= 0); |
| |
| /* nothing to do if this MB was skipped in the next P Frame */ |
| if (s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { // FIXME avoid DCT & ... |
| s->skip_count++; |
| s->mv[0][0][0] = |
| s->mv[0][0][1] = |
| s->mv[1][0][0] = |
| s->mv[1][0][1] = 0; |
| s->mv_dir = MV_DIR_FORWARD; // doesn't matter |
| s->qscale -= s->dquant; |
| // s->mb_skipped = 1; |
| |
| return; |
| } |
| |
| cbp = get_b_cbp(s, block, motion_x, motion_y, mb_type); |
| |
| if ((cbp | motion_x | motion_y | mb_type) == 0) { |
| /* direct MB with MV={0,0} */ |
| av_assert2(s->dquant == 0); |
| |
| put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */ |
| |
| if (interleaved_stats) { |
| s->misc_bits++; |
| s->last_bits++; |
| } |
| s->skip_count++; |
| return; |
| } |
| |
| put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */ |
| put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ // FIXME merge |
| put_bits(&s->pb, mb_type + 1, 1); // this table is so simple that we don't need it :) |
| if (cbp) |
| put_bits(&s->pb, 6, cbp); |
| |
| if (cbp && mb_type) { |
| if (s->dquant) |
| put_bits(&s->pb, 2, (s->dquant >> 2) + 3); |
| else |
| put_bits(&s->pb, 1, 0); |
| } else |
| s->qscale -= s->dquant; |
| |
| if (!s->progressive_sequence) { |
| if (cbp) |
| put_bits(&s->pb, 1, s->interlaced_dct); |
| if (mb_type) // not direct mode |
| put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD); |
| } |
| |
| if (interleaved_stats) |
| s->misc_bits += get_bits_diff(s); |
| |
| if (!mb_type) { |
| av_assert2(s->mv_dir & MV_DIRECT); |
| ff_h263_encode_motion_vector(s, motion_x, motion_y, 1); |
| s->b_count++; |
| s->f_count++; |
| } else { |
| av_assert2(mb_type > 0 && mb_type < 4); |
| if (s->mv_type != MV_TYPE_FIELD) { |
| if (s->mv_dir & MV_DIR_FORWARD) { |
| ff_h263_encode_motion_vector(s, |
| s->mv[0][0][0] - s->last_mv[0][0][0], |
| s->mv[0][0][1] - s->last_mv[0][0][1], |
| s->f_code); |
| s->last_mv[0][0][0] = |
| s->last_mv[0][1][0] = s->mv[0][0][0]; |
| s->last_mv[0][0][1] = |
| s->last_mv[0][1][1] = s->mv[0][0][1]; |
| s->f_count++; |
| } |
| if (s->mv_dir & MV_DIR_BACKWARD) { |
| ff_h263_encode_motion_vector(s, |
| s->mv[1][0][0] - s->last_mv[1][0][0], |
| s->mv[1][0][1] - s->last_mv[1][0][1], |
| s->b_code); |
| s->last_mv[1][0][0] = |
| s->last_mv[1][1][0] = s->mv[1][0][0]; |
| s->last_mv[1][0][1] = |
| s->last_mv[1][1][1] = s->mv[1][0][1]; |
| s->b_count++; |
| } |
| } else { |
| if (s->mv_dir & MV_DIR_FORWARD) { |
| put_bits(&s->pb, 1, s->field_select[0][0]); |
| put_bits(&s->pb, 1, s->field_select[0][1]); |
| } |
| if (s->mv_dir & MV_DIR_BACKWARD) { |
| put_bits(&s->pb, 1, s->field_select[1][0]); |
| put_bits(&s->pb, 1, s->field_select[1][1]); |
| } |
| if (s->mv_dir & MV_DIR_FORWARD) { |
| for (i = 0; i < 2; i++) { |
| ff_h263_encode_motion_vector(s, |
| s->mv[0][i][0] - s->last_mv[0][i][0], |
| s->mv[0][i][1] - s->last_mv[0][i][1] / 2, |
| s->f_code); |
| s->last_mv[0][i][0] = s->mv[0][i][0]; |
| s->last_mv[0][i][1] = s->mv[0][i][1] * 2; |
| } |
| s->f_count++; |
| } |
| if (s->mv_dir & MV_DIR_BACKWARD) { |
| for (i = 0; i < 2; i++) { |
| ff_h263_encode_motion_vector(s, |
| s->mv[1][i][0] - s->last_mv[1][i][0], |
| s->mv[1][i][1] - s->last_mv[1][i][1] / 2, |
| s->b_code); |
| s->last_mv[1][i][0] = s->mv[1][i][0]; |
| s->last_mv[1][i][1] = s->mv[1][i][1] * 2; |
| } |
| s->b_count++; |
| } |
| } |
| } |
| |
| if (interleaved_stats) |
| s->mv_bits += get_bits_diff(s); |
| |
| mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb); |
| |
| if (interleaved_stats) |
| s->p_tex_bits += get_bits_diff(s); |
| } else { /* s->pict_type==AV_PICTURE_TYPE_B */ |
| cbp = get_p_cbp(s, block, motion_x, motion_y); |
| |
| if ((cbp | motion_x | motion_y | s->dquant) == 0 && |
| s->mv_type == MV_TYPE_16X16) { |
| /* check if the B frames can skip it too, as we must skip it |
| * if we skip here why didn't they just compress |
| * the skip-mb bits instead of reusing them ?! */ |
| if (s->max_b_frames > 0) { |
| int i; |
| int x, y, offset; |
| uint8_t *p_pic; |
| |
| x = s->mb_x * 16; |
| y = s->mb_y * 16; |
| |
| offset = x + y * s->linesize; |
| p_pic = s->new_picture.f->data[0] + offset; |
| |
| s->mb_skipped = 1; |
| for (i = 0; i < s->max_b_frames; i++) { |
| uint8_t *b_pic; |
| int diff; |
| Picture *pic = s->reordered_input_picture[i + 1]; |
| |
| if (!pic || pic->f->pict_type != AV_PICTURE_TYPE_B) |
| break; |
| |
| b_pic = pic->f->data[0] + offset; |
| if (!pic->shared) |
| b_pic += INPLACE_OFFSET; |
| |
| if (x + 16 > s->width || y + 16 > s->height) { |
| int x1, y1; |
| int xe = FFMIN(16, s->width - x); |
| int ye = FFMIN(16, s->height - y); |
| diff = 0; |
| for (y1 = 0; y1 < ye; y1++) { |
| for (x1 = 0; x1 < xe; x1++) { |
| diff += FFABS(p_pic[x1 + y1 * s->linesize] - b_pic[x1 + y1 * s->linesize]); |
| } |
| } |
| diff = diff * 256 / (xe * ye); |
| } else { |
| diff = s->mecc.sad[0](NULL, p_pic, b_pic, s->linesize, 16); |
| } |
| if (diff > s->qscale * 70) { // FIXME check that 70 is optimal |
| s->mb_skipped = 0; |
| break; |
| } |
| } |
| } else |
| s->mb_skipped = 1; |
| |
| if (s->mb_skipped == 1) { |
| /* skip macroblock */ |
| put_bits(&s->pb, 1, 1); |
| |
| if (interleaved_stats) { |
| s->misc_bits++; |
| s->last_bits++; |
| } |
| s->skip_count++; |
| |
| return; |
| } |
| } |
| |
| put_bits(&s->pb, 1, 0); /* mb coded */ |
| cbpc = cbp & 3; |
| cbpy = cbp >> 2; |
| cbpy ^= 0xf; |
| if (s->mv_type == MV_TYPE_16X16) { |
| if (s->dquant) |
| cbpc += 8; |
| put_bits(&s->pb, |
| ff_h263_inter_MCBPC_bits[cbpc], |
| ff_h263_inter_MCBPC_code[cbpc]); |
| |
| put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
| if (s->dquant) |
| put_bits(pb2, 2, dquant_code[s->dquant + 2]); |
| |
| if (!s->progressive_sequence) { |
| if (cbp) |
| put_bits(pb2, 1, s->interlaced_dct); |
| put_bits(pb2, 1, 0); |
| } |
| |
| if (interleaved_stats) |
| s->misc_bits += get_bits_diff(s); |
| |
| /* motion vectors: 16x16 mode */ |
| ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
| |
| ff_h263_encode_motion_vector(s, |
| motion_x - pred_x, |
| motion_y - pred_y, |
| s->f_code); |
| } else if (s->mv_type == MV_TYPE_FIELD) { |
| if (s->dquant) |
| cbpc += 8; |
| put_bits(&s->pb, |
| ff_h263_inter_MCBPC_bits[cbpc], |
| ff_h263_inter_MCBPC_code[cbpc]); |
| |
| put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
| if (s->dquant) |
| put_bits(pb2, 2, dquant_code[s->dquant + 2]); |
| |
| av_assert2(!s->progressive_sequence); |
| if (cbp) |
| put_bits(pb2, 1, s->interlaced_dct); |
| put_bits(pb2, 1, 1); |
| |
| if (interleaved_stats) |
| s->misc_bits += get_bits_diff(s); |
| |
| /* motion vectors: 16x8 interlaced mode */ |
| ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
| pred_y /= 2; |
| |
| put_bits(&s->pb, 1, s->field_select[0][0]); |
| put_bits(&s->pb, 1, s->field_select[0][1]); |
| |
| ff_h263_encode_motion_vector(s, |
| s->mv[0][0][0] - pred_x, |
| s->mv[0][0][1] - pred_y, |
| s->f_code); |
| ff_h263_encode_motion_vector(s, |
| s->mv[0][1][0] - pred_x, |
| s->mv[0][1][1] - pred_y, |
| s->f_code); |
| } else { |
| av_assert2(s->mv_type == MV_TYPE_8X8); |
| put_bits(&s->pb, |
| ff_h263_inter_MCBPC_bits[cbpc + 16], |
| ff_h263_inter_MCBPC_code[cbpc + 16]); |
| put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
| |
| if (!s->progressive_sequence && cbp) |
| put_bits(pb2, 1, s->interlaced_dct); |
| |
| if (interleaved_stats) |
| s->misc_bits += get_bits_diff(s); |
| |
| for (i = 0; i < 4; i++) { |
| /* motion vectors: 8x8 mode*/ |
| ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); |
| |
| ff_h263_encode_motion_vector(s, |
| s->current_picture.motion_val[0][s->block_index[i]][0] - pred_x, |
| s->current_picture.motion_val[0][s->block_index[i]][1] - pred_y, |
| s->f_code); |
| } |
| } |
| |
| if (interleaved_stats) |
| s->mv_bits += get_bits_diff(s); |
| |
| mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb); |
| |
| if (interleaved_stats) |
| s->p_tex_bits += get_bits_diff(s); |
| |
| s->f_count++; |
| } |
| } else { |
| int cbp; |
| int dc_diff[6]; // dc values with the dc prediction subtracted |
| int dir[6]; // prediction direction |
| int zigzag_last_index[6]; |
| uint8_t *scan_table[6]; |
| int i; |
| |
| for (i = 0; i < 6; i++) |
| dc_diff[i] = ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1); |
| |
| if (s->avctx->flags & AV_CODEC_FLAG_AC_PRED) { |
| s->ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index); |
| } else { |
| for (i = 0; i < 6; i++) |
| scan_table[i] = s->intra_scantable.permutated; |
| } |
| |
| /* compute cbp */ |
| cbp = 0; |
| for (i = 0; i < 6; i++) |
| if (s->block_last_index[i] >= 1) |
| cbp |= 1 << (5 - i); |
| |
| cbpc = cbp & 3; |
| if (s->pict_type == AV_PICTURE_TYPE_I) { |
| if (s->dquant) |
| cbpc += 4; |
| put_bits(&s->pb, |
| ff_h263_intra_MCBPC_bits[cbpc], |
| ff_h263_intra_MCBPC_code[cbpc]); |
| } else { |
| if (s->dquant) |
| cbpc += 8; |
| put_bits(&s->pb, 1, 0); /* mb coded */ |
| put_bits(&s->pb, |
| ff_h263_inter_MCBPC_bits[cbpc + 4], |
| ff_h263_inter_MCBPC_code[cbpc + 4]); |
| } |
| put_bits(pb2, 1, s->ac_pred); |
| cbpy = cbp >> 2; |
| put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
| if (s->dquant) |
| put_bits(dc_pb, 2, dquant_code[s->dquant + 2]); |
| |
| if (!s->progressive_sequence) |
| put_bits(dc_pb, 1, s->interlaced_dct); |
| |
| if (interleaved_stats) |
| s->misc_bits += get_bits_diff(s); |
| |
| mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb); |
| |
| if (interleaved_stats) |
| s->i_tex_bits += get_bits_diff(s); |
| s->i_count++; |
| |
| /* restore ac coeffs & last_index stuff |
| * if we messed them up with the prediction */ |
| if (s->ac_pred) |
| restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index); |
| } |
| } |
| |
| /** |
| * add mpeg4 stuffing bits (01...1) |
| */ |
| void ff_mpeg4_stuffing(PutBitContext *pbc) |
| { |
| int length; |
| put_bits(pbc, 1, 0); |
| length = (-put_bits_count(pbc)) & 7; |
| if (length) |
| put_bits(pbc, length, (1 << length) - 1); |
| } |
| |
| /* must be called before writing the header */ |
| void ff_set_mpeg4_time(MpegEncContext *s) |
| { |
| if (s->pict_type == AV_PICTURE_TYPE_B) { |
| ff_mpeg4_init_direct_mv(s); |
| } else { |
| s->last_time_base = s->time_base; |
| s->time_base = FFUDIV(s->time, s->avctx->time_base.den); |
| } |
| } |
| |
| static void mpeg4_encode_gop_header(MpegEncContext *s) |
| { |
| int hours, minutes, seconds; |
| int64_t time; |
| |
| put_bits(&s->pb, 16, 0); |
| put_bits(&s->pb, 16, GOP_STARTCODE); |
| |
| time = s->current_picture_ptr->f->pts; |
| if (s->reordered_input_picture[1]) |
| time = FFMIN(time, s->reordered_input_picture[1]->f->pts); |
| time = time * s->avctx->time_base.num; |
| s->last_time_base = FFUDIV(time, s->avctx->time_base.den); |
| |
| seconds = FFUDIV(time, s->avctx->time_base.den); |
| minutes = FFUDIV(seconds, 60); seconds = FFUMOD(seconds, 60); |
| hours = FFUDIV(minutes, 60); minutes = FFUMOD(minutes, 60); |
| hours = FFUMOD(hours , 24); |
| |
| put_bits(&s->pb, 5, hours); |
| put_bits(&s->pb, 6, minutes); |
| put_bits(&s->pb, 1, 1); |
| put_bits(&s->pb, 6, seconds); |
| |
| put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP)); |
| put_bits(&s->pb, 1, 0); // broken link == NO |
| |
| ff_mpeg4_stuffing(&s->pb); |
| } |
| |
| static void mpeg4_encode_visual_object_header(MpegEncContext *s) |
| { |
| int profile_and_level_indication; |
| int vo_ver_id; |
| |
| if (s->avctx->profile != FF_PROFILE_UNKNOWN) { |
| profile_and_level_indication = s->avctx->profile << 4; |
| } else if (s->max_b_frames || s->quarter_sample) { |
| profile_and_level_indication = 0xF0; // adv simple |
| } else { |
| profile_and_level_indication = 0x00; // simple |
| } |
| |
| if (s->avctx->level != FF_LEVEL_UNKNOWN) |
| profile_and_level_indication |= s->avctx->level; |
| else |
| profile_and_level_indication |= 1; // level 1 |
| |
| if (profile_and_level_indication >> 4 == 0xF) |
| vo_ver_id = 5; |
| else |
| vo_ver_id = 1; |
| |
| // FIXME levels |
| |
| put_bits(&s->pb, 16, 0); |
| put_bits(&s->pb, 16, VOS_STARTCODE); |
| |
| put_bits(&s->pb, 8, profile_and_level_indication); |
| |
| put_bits(&s->pb, 16, 0); |
| put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE); |
| |
| put_bits(&s->pb, 1, 1); |
| put_bits(&s->pb, 4, vo_ver_id); |
| put_bits(&s->pb, 3, 1); // priority |
| |
| put_bits(&s->pb, 4, 1); // visual obj type== video obj |
| |
| put_bits(&s->pb, 1, 0); // video signal type == no clue // FIXME |
| |
| ff_mpeg4_stuffing(&s->pb); |
| } |
| |
| static void mpeg4_encode_vol_header(MpegEncContext *s, |
| int vo_number, |
| int vol_number) |
| { |
| int vo_ver_id; |
| |
| if (!CONFIG_MPEG4_ENCODER) |
| return; |
| |
| if (s->max_b_frames || s->quarter_sample) { |
| vo_ver_id = 5; |
| s->vo_type = ADV_SIMPLE_VO_TYPE; |
| } else { |
| vo_ver_id = 1; |
| s->vo_type = SIMPLE_VO_TYPE; |
| } |
| |
| put_bits(&s->pb, 16, 0); |
| put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */ |
| put_bits(&s->pb, 16, 0); |
| put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */ |
| |
| put_bits(&s->pb, 1, 0); /* random access vol */ |
| put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */ |
| if (s->workaround_bugs & FF_BUG_MS) { |
| put_bits(&s->pb, 1, 0); /* is obj layer id= no */ |
| } else { |
| put_bits(&s->pb, 1, 1); /* is obj layer id= yes */ |
| put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */ |
| put_bits(&s->pb, 3, 1); /* is obj layer priority */ |
| } |
| |
| s->aspect_ratio_info = ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio); |
| |
| put_bits(&s->pb, 4, s->aspect_ratio_info); /* aspect ratio info */ |
| if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) { |
| av_reduce(&s->avctx->sample_aspect_ratio.num, &s->avctx->sample_aspect_ratio.den, |
| s->avctx->sample_aspect_ratio.num, s->avctx->sample_aspect_ratio.den, 255); |
| put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num); |
| put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den); |
| } |
| |
| if (s->workaround_bugs & FF_BUG_MS) { |
| put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */ |
| } else { |
| put_bits(&s->pb, 1, 1); /* vol control parameters= yes */ |
| put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */ |
| put_bits(&s->pb, 1, s->low_delay); |
| put_bits(&s->pb, 1, 0); /* vbv parameters= no */ |
| } |
| |
| put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */ |
| put_bits(&s->pb, 1, 1); /* marker bit */ |
| |
| put_bits(&s->pb, 16, s->avctx->time_base.den); |
| if (s->time_increment_bits < 1) |
| s->time_increment_bits = 1; |
| put_bits(&s->pb, 1, 1); /* marker bit */ |
| put_bits(&s->pb, 1, 0); /* fixed vop rate=no */ |
| put_bits(&s->pb, 1, 1); /* marker bit */ |
| put_bits(&s->pb, 13, s->width); /* vol width */ |
| put_bits(&s->pb, 1, 1); /* marker bit */ |
| put_bits(&s->pb, 13, s->height); /* vol height */ |
| put_bits(&s->pb, 1, 1); /* marker bit */ |
| put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1); |
| put_bits(&s->pb, 1, 1); /* obmc disable */ |
| if (vo_ver_id == 1) |
| put_bits(&s->pb, 1, 0); /* sprite enable */ |
| else |
| put_bits(&s->pb, 2, 0); /* sprite enable */ |
| |
| put_bits(&s->pb, 1, 0); /* not 8 bit == false */ |
| put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/ |
| |
| if (s->mpeg_quant) { |
| ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix); |
| ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix); |
| } |
| |
| if (vo_ver_id != 1) |
| put_bits(&s->pb, 1, s->quarter_sample); |
| put_bits(&s->pb, 1, 1); /* complexity estimation disable */ |
| put_bits(&s->pb, 1, s->rtp_mode ? 0 : 1); /* resync marker disable */ |
| put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0); |
| if (s->data_partitioning) |
| put_bits(&s->pb, 1, 0); /* no rvlc */ |
| |
| if (vo_ver_id != 1) { |
| put_bits(&s->pb, 1, 0); /* newpred */ |
| put_bits(&s->pb, 1, 0); /* reduced res vop */ |
| } |
| put_bits(&s->pb, 1, 0); /* scalability */ |
| |
| ff_mpeg4_stuffing(&s->pb); |
| |
| /* user data */ |
| if (!(s->avctx->flags & AV_CODEC_FLAG_BITEXACT)) { |
| put_bits(&s->pb, 16, 0); |
| put_bits(&s->pb, 16, 0x1B2); /* user_data */ |
| avpriv_put_string(&s->pb, LIBAVCODEC_IDENT, 0); |
| } |
| } |
| |
| /* write mpeg4 VOP header */ |
| int ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number) |
| { |
| uint64_t time_incr; |
| int64_t time_div, time_mod; |
| |
| if (s->pict_type == AV_PICTURE_TYPE_I) { |
| if (!(s->avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)) { |
| if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) // HACK, the reference sw is buggy |
| mpeg4_encode_visual_object_header(s); |
| if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number == 0) // HACK, the reference sw is buggy |
| mpeg4_encode_vol_header(s, 0, 0); |
| } |
| if (!(s->workaround_bugs & FF_BUG_MS)) |
| mpeg4_encode_gop_header(s); |
| } |
| |
| s->partitioned_frame = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B; |
| |
| put_bits(&s->pb, 16, 0); /* vop header */ |
| put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */ |
| put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */ |
| |
| time_div = FFUDIV(s->time, s->avctx->time_base.den); |
| time_mod = FFUMOD(s->time, s->avctx->time_base.den); |
| time_incr = time_div - s->last_time_base; |
| |
| // This limits the frame duration to max 1 hour |
| if (time_incr > 3600) { |
| av_log(s->avctx, AV_LOG_ERROR, "time_incr %"PRIu64" too large\n", time_incr); |
| return AVERROR(EINVAL); |
| } |
| while (time_incr--) |
| put_bits(&s->pb, 1, 1); |
| |
| put_bits(&s->pb, 1, 0); |
| |
| put_bits(&s->pb, 1, 1); /* marker */ |
| put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */ |
| put_bits(&s->pb, 1, 1); /* marker */ |
| put_bits(&s->pb, 1, 1); /* vop coded */ |
| if (s->pict_type == AV_PICTURE_TYPE_P) { |
| put_bits(&s->pb, 1, s->no_rounding); /* rounding type */ |
| } |
| put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */ |
| if (!s->progressive_sequence) { |
| put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first); |
| put_bits(&s->pb, 1, s->alternate_scan); |
| } |
| // FIXME sprite stuff |
| |
| put_bits(&s->pb, 5, s->qscale); |
| |
| if (s->pict_type != AV_PICTURE_TYPE_I) |
| put_bits(&s->pb, 3, s->f_code); /* fcode_for */ |
| if (s->pict_type == AV_PICTURE_TYPE_B) |
| put_bits(&s->pb, 3, s->b_code); /* fcode_back */ |
| |
| return 0; |
| } |
| |
| static av_cold void init_uni_dc_tab(void) |
| { |
| int level, uni_code, uni_len; |
| |
| for (level = -256; level < 256; level++) { |
| int size, v, l; |
| /* find number of bits */ |
| size = 0; |
| v = abs(level); |
| while (v) { |
| v >>= 1; |
| size++; |
| } |
| |
| if (level < 0) |
| l = (-level) ^ ((1 << size) - 1); |
| else |
| l = level; |
| |
| /* luminance */ |
| uni_code = ff_mpeg4_DCtab_lum[size][0]; |
| uni_len = ff_mpeg4_DCtab_lum[size][1]; |
| |
| if (size > 0) { |
| uni_code <<= size; |
| uni_code |= l; |
| uni_len += size; |
| if (size > 8) { |
| uni_code <<= 1; |
| uni_code |= 1; |
| uni_len++; |
| } |
| } |
| uni_DCtab_lum_bits[level + 256] = uni_code; |
| uni_DCtab_lum_len[level + 256] = uni_len; |
| |
| /* chrominance */ |
| uni_code = ff_mpeg4_DCtab_chrom[size][0]; |
| uni_len = ff_mpeg4_DCtab_chrom[size][1]; |
| |
| if (size > 0) { |
| uni_code <<= size; |
| uni_code |= l; |
| uni_len += size; |
| if (size > 8) { |
| uni_code <<= 1; |
| uni_code |= 1; |
| uni_len++; |
| } |
| } |
| uni_DCtab_chrom_bits[level + 256] = uni_code; |
| uni_DCtab_chrom_len[level + 256] = uni_len; |
| } |
| } |
| |
| static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, |
| uint8_t *len_tab) |
| { |
| int slevel, run, last; |
| |
| av_assert0(MAX_LEVEL >= 64); |
| av_assert0(MAX_RUN >= 63); |
| |
| for (slevel = -64; slevel < 64; slevel++) { |
| if (slevel == 0) |
| continue; |
| for (run = 0; run < 64; run++) { |
| for (last = 0; last <= 1; last++) { |
| const int index = UNI_MPEG4_ENC_INDEX(last, run, slevel + 64); |
| int level = slevel < 0 ? -slevel : slevel; |
| int sign = slevel < 0 ? 1 : 0; |
| int bits, len, code; |
| int level1, run1; |
| |
| len_tab[index] = 100; |
| |
| /* ESC0 */ |
| code = get_rl_index(rl, last, run, level); |
| bits = rl->table_vlc[code][0]; |
| len = rl->table_vlc[code][1]; |
| bits = bits * 2 + sign; |
| len++; |
| |
| if (code != rl->n && len < len_tab[index]) { |
| bits_tab[index] = bits; |
| len_tab[index] = len; |
| } |
| /* ESC1 */ |
| bits = rl->table_vlc[rl->n][0]; |
| len = rl->table_vlc[rl->n][1]; |
| bits = bits * 2; |
| len++; // esc1 |
| level1 = level - rl->max_level[last][run]; |
| if (level1 > 0) { |
| code = get_rl_index(rl, last, run, level1); |
| bits <<= rl->table_vlc[code][1]; |
| len += rl->table_vlc[code][1]; |
| bits += rl->table_vlc[code][0]; |
| bits = bits * 2 + sign; |
| len++; |
| |
| if (code != rl->n && len < len_tab[index]) { |
| bits_tab[index] = bits; |
| len_tab[index] = len; |
| } |
| } |
| /* ESC2 */ |
| bits = rl->table_vlc[rl->n][0]; |
| len = rl->table_vlc[rl->n][1]; |
| bits = bits * 4 + 2; |
| len += 2; // esc2 |
| run1 = run - rl->max_run[last][level] - 1; |
| if (run1 >= 0) { |
| code = get_rl_index(rl, last, run1, level); |
| bits <<= rl->table_vlc[code][1]; |
| len += rl->table_vlc[code][1]; |
| bits += rl->table_vlc[code][0]; |
| bits = bits * 2 + sign; |
| len++; |
| |
| if (code != rl->n && len < len_tab[index]) { |
| bits_tab[index] = bits; |
| len_tab[index] = len; |
| } |
| } |
| /* ESC3 */ |
| bits = rl->table_vlc[rl->n][0]; |
| len = rl->table_vlc[rl->n][1]; |
| bits = bits * 4 + 3; |
| len += 2; // esc3 |
| bits = bits * 2 + last; |
| len++; |
| bits = bits * 64 + run; |
| len += 6; |
| bits = bits * 2 + 1; |
| len++; // marker |
| bits = bits * 4096 + (slevel & 0xfff); |
| len += 12; |
| bits = bits * 2 + 1; |
| len++; // marker |
| |
| if (len < len_tab[index]) { |
| bits_tab[index] = bits; |
| len_tab[index] = len; |
| } |
| } |
| } |
| } |
| } |
| |
| static av_cold int encode_init(AVCodecContext *avctx) |
| { |
| MpegEncContext *s = avctx->priv_data; |
| int ret; |
| static int done = 0; |
| |
| if (avctx->width >= (1<<13) || avctx->height >= (1<<13)) { |
| av_log(avctx, AV_LOG_ERROR, "dimensions too large for MPEG-4\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| if ((ret = ff_mpv_encode_init(avctx)) < 0) |
| return ret; |
| |
| if (!done) { |
| done = 1; |
| |
| init_uni_dc_tab(); |
| |
| ff_rl_init(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]); |
| |
| init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len); |
| init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len); |
| } |
| |
| s->min_qcoeff = -2048; |
| s->max_qcoeff = 2047; |
| s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len; |
| s->intra_ac_vlc_last_length = uni_mpeg4_intra_rl_len + 128 * 64; |
| s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len; |
| s->inter_ac_vlc_last_length = uni_mpeg4_inter_rl_len + 128 * 64; |
| s->luma_dc_vlc_length = uni_DCtab_lum_len; |
| s->ac_esc_length = 7 + 2 + 1 + 6 + 1 + 12 + 1; |
| s->y_dc_scale_table = ff_mpeg4_y_dc_scale_table; |
| s->c_dc_scale_table = ff_mpeg4_c_dc_scale_table; |
| |
| if (s->avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) { |
| s->avctx->extradata = av_malloc(1024); |
| init_put_bits(&s->pb, s->avctx->extradata, 1024); |
| |
| if (!(s->workaround_bugs & FF_BUG_MS)) |
| mpeg4_encode_visual_object_header(s); |
| mpeg4_encode_vol_header(s, 0, 0); |
| |
| // ff_mpeg4_stuffing(&s->pb); ? |
| flush_put_bits(&s->pb); |
| s->avctx->extradata_size = (put_bits_count(&s->pb) + 7) >> 3; |
| } |
| return 0; |
| } |
| |
| void ff_mpeg4_init_partitions(MpegEncContext *s) |
| { |
| uint8_t *start = put_bits_ptr(&s->pb); |
| uint8_t *end = s->pb.buf_end; |
| int size = end - start; |
| int pb_size = (((intptr_t)start + size / 3) & (~3)) - (intptr_t)start; |
| int tex_size = (size - 2 * pb_size) & (~3); |
| |
| set_put_bits_buffer_size(&s->pb, pb_size); |
| init_put_bits(&s->tex_pb, start + pb_size, tex_size); |
| init_put_bits(&s->pb2, start + pb_size + tex_size, pb_size); |
| } |
| |
| void ff_mpeg4_merge_partitions(MpegEncContext *s) |
| { |
| const int pb2_len = put_bits_count(&s->pb2); |
| const int tex_pb_len = put_bits_count(&s->tex_pb); |
| const int bits = put_bits_count(&s->pb); |
| |
| if (s->pict_type == AV_PICTURE_TYPE_I) { |
| put_bits(&s->pb, 19, DC_MARKER); |
| s->misc_bits += 19 + pb2_len + bits - s->last_bits; |
| s->i_tex_bits += tex_pb_len; |
| } else { |
| put_bits(&s->pb, 17, MOTION_MARKER); |
| s->misc_bits += 17 + pb2_len; |
| s->mv_bits += bits - s->last_bits; |
| s->p_tex_bits += tex_pb_len; |
| } |
| |
| flush_put_bits(&s->pb2); |
| flush_put_bits(&s->tex_pb); |
| |
| set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf); |
| avpriv_copy_bits(&s->pb, s->pb2.buf, pb2_len); |
| avpriv_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len); |
| s->last_bits = put_bits_count(&s->pb); |
| } |
| |
| void ff_mpeg4_encode_video_packet_header(MpegEncContext *s) |
| { |
| int mb_num_bits = av_log2(s->mb_num - 1) + 1; |
| |
| put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0); |
| put_bits(&s->pb, 1, 1); |
| |
| put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y * s->mb_width); |
| put_bits(&s->pb, s->quant_precision, s->qscale); |
| put_bits(&s->pb, 1, 0); /* no HEC */ |
| } |
| |
| #define OFFSET(x) offsetof(MpegEncContext, x) |
| #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM |
| static const AVOption options[] = { |
| { "data_partitioning", "Use data partitioning.", OFFSET(data_partitioning), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, |
| { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, |
| FF_MPV_COMMON_OPTS |
| { NULL }, |
| }; |
| |
| static const AVClass mpeg4enc_class = { |
| .class_name = "MPEG4 encoder", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| AVCodec ff_mpeg4_encoder = { |
| .name = "mpeg4", |
| .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_MPEG4, |
| .priv_data_size = sizeof(MpegEncContext), |
| .init = encode_init, |
| .encode2 = ff_mpv_encode_picture, |
| .close = ff_mpv_encode_end, |
| .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, |
| .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS, |
| .priv_class = &mpeg4enc_class, |
| }; |
