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Diffstat (limited to 'ffmpeg/libavcodec/mpeg12enc.c')
-rw-r--r--ffmpeg/libavcodec/mpeg12enc.c1137
1 files changed, 0 insertions, 1137 deletions
diff --git a/ffmpeg/libavcodec/mpeg12enc.c b/ffmpeg/libavcodec/mpeg12enc.c
deleted file mode 100644
index 22f9fcb..0000000
--- a/ffmpeg/libavcodec/mpeg12enc.c
+++ /dev/null
@@ -1,1137 +0,0 @@
-/*
- * MPEG1/2 encoder
- * Copyright (c) 2000,2001 Fabrice Bellard
- * Copyright (c) 2002-2004 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
- */
-
-/**
- * @file
- * MPEG1/2 encoder
- */
-
-#include <stdint.h>
-
-#include "libavutil/attributes.h"
-#include "libavutil/avassert.h"
-#include "libavutil/log.h"
-#include "libavutil/opt.h"
-#include "libavutil/timecode.h"
-#include "libavutil/stereo3d.h"
-
-#include "avcodec.h"
-#include "bytestream.h"
-#include "mathops.h"
-#include "mpeg12.h"
-#include "mpeg12data.h"
-#include "mpegvideo.h"
-
-
-static const uint8_t inv_non_linear_qscale[] = {
- 0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
-};
-
-static const uint8_t svcd_scan_offset_placeholder[] = {
- 0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
- 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
-};
-
-static uint8_t mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
-static uint8_t fcode_tab[MAX_MV * 2 + 1];
-
-static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
-static uint8_t uni_mpeg2_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];
-
-static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
-{
- int i;
-
- for (i = 0; i < 128; i++) {
- int level = i - 64;
- int run;
- if (!level)
- continue;
- for (run = 0; run < 64; run++) {
- int len, code;
- int alevel = FFABS(level);
-
- 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 */
- /* length of VLC and sign */
- len = rl->table_vlc[code][1] + 1;
- } else {
- len = rl->table_vlc[111 /* rl->n */][1] + 6;
-
- if (alevel < 128)
- len += 8;
- else
- len += 16;
- }
-
- uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
- }
- }
-}
-
-static int find_frame_rate_index(MpegEncContext *s)
-{
- int i;
- AVRational bestq = (AVRational) {0, 0};
- AVRational ext;
- AVRational target = av_inv_q(s->avctx->time_base);
-
- for (i = 1; i < 14; i++) {
- if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
- i >= 9)
- break;
-
- for (ext.num=1; ext.num <= 4; ext.num++) {
- for (ext.den=1; ext.den <= 32; ext.den++) {
- AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
-
- if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
- continue;
- if (av_gcd(ext.den, ext.num) != 1)
- continue;
-
- if ( bestq.num==0
- || av_nearer_q(target, bestq, q) < 0
- || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
- bestq = q;
- s->frame_rate_index = i;
- s->mpeg2_frame_rate_ext.num = ext.num;
- s->mpeg2_frame_rate_ext.den = ext.den;
- }
- }
- }
- }
-
- if (av_cmp_q(target, bestq))
- return -1;
- else
- return 0;
-}
-
-static av_cold int encode_init(AVCodecContext *avctx)
-{
- MpegEncContext *s = avctx->priv_data;
-
- if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)
- avctx->thread_count = 1;
-
- if (ff_MPV_encode_init(avctx) < 0)
- return -1;
-
- if (find_frame_rate_index(s) < 0) {
- if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
- av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
- avctx->time_base.den, avctx->time_base.num);
- return -1;
- } else {
- av_log(avctx, AV_LOG_INFO,
- "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
- avctx->time_base.den, avctx->time_base.num);
- }
- }
-
- if (avctx->profile == FF_PROFILE_UNKNOWN) {
- if (avctx->level != FF_LEVEL_UNKNOWN) {
- av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
- return -1;
- }
- /* Main or 4:2:2 */
- avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
- }
-
- if (avctx->level == FF_LEVEL_UNKNOWN) {
- if (avctx->profile == 0) { /* 4:2:2 */
- if (avctx->width <= 720 && avctx->height <= 608)
- avctx->level = 5; /* Main */
- else
- avctx->level = 2; /* High */
- } else {
- if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
- av_log(avctx, AV_LOG_ERROR,
- "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
- return -1;
- }
- if (avctx->width <= 720 && avctx->height <= 576)
- avctx->level = 8; /* Main */
- else if (avctx->width <= 1440)
- avctx->level = 6; /* High 1440 */
- else
- avctx->level = 4; /* High */
- }
- }
-
- if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
- av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
- return AVERROR(EINVAL);
- }
-
- if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
- if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
- av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiplies of 4096\n"
- "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
- return AVERROR(EINVAL);
- }
- }
-
- s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
- if (s->drop_frame_timecode)
- s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
- if (s->drop_frame_timecode && s->frame_rate_index != 4) {
- av_log(avctx, AV_LOG_ERROR,
- "Drop frame time code only allowed with 1001/30000 fps\n");
- return -1;
- }
-
- if (s->tc_opt_str) {
- AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
- int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
- if (ret < 0)
- return ret;
- s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
- s->avctx->timecode_frame_start = s->tc.start;
- } else {
- s->avctx->timecode_frame_start = 0; // default is -1
- }
- return 0;
-}
-
-static void put_header(MpegEncContext *s, int header)
-{
- avpriv_align_put_bits(&s->pb);
- put_bits(&s->pb, 16, header >> 16);
- put_sbits(&s->pb, 16, header);
-}
-
-/* put sequence header if needed */
-static void mpeg1_encode_sequence_header(MpegEncContext *s)
-{
- unsigned int vbv_buffer_size, fps, v;
- int i, constraint_parameter_flag;
- uint64_t time_code;
- float best_aspect_error = 1E10;
- float aspect_ratio = av_q2d(s->avctx->sample_aspect_ratio);
-
- if (aspect_ratio == 0.0)
- aspect_ratio = 1.0; // pixel aspect 1.1 (VGA)
-
- if (s->current_picture.f.key_frame) {
- AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
-
- /* mpeg1 header repeated every gop */
- put_header(s, SEQ_START_CODE);
-
- put_sbits(&s->pb, 12, s->width & 0xFFF);
- put_sbits(&s->pb, 12, s->height & 0xFFF);
-
- for (i = 1; i < 15; i++) {
- float error = aspect_ratio;
- if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
- error -= 1.0 / ff_mpeg1_aspect[i];
- else
- error -= av_q2d(ff_mpeg2_aspect[i]) * s->height / s->width;
-
- error = FFABS(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 == AV_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_sbits(&s->pb, 18, v);
- put_bits(&s->pb, 1, 1); // marker
- put_sbits(&s->pb, 10, vbv_buffer_size);
-
- constraint_parameter_flag =
- s->width <= 768 &&
- s->height <= 576 &&
- s->mb_width * s->mb_height <= 396 &&
- s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
- framerate.num <= framerate.den * 30 &&
- s->avctx->me_range &&
- s->avctx->me_range < 128 &&
- vbv_buffer_size <= 20 &&
- v <= 1856000 / 400 &&
- s->codec_id == AV_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 == AV_CODEC_ID_MPEG2VIDEO) {
- put_header(s, EXT_START_CODE);
- put_bits(&s->pb, 4, 1); // seq ext
-
- put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
-
- put_bits(&s->pb, 3, s->avctx->profile); // profile
- put_bits(&s->pb, 4, s->avctx->level); // level
-
- put_bits(&s->pb, 1, s->progressive_sequence);
- put_bits(&s->pb, 2, s->chroma_format);
- put_bits(&s->pb, 2, s->width >> 12);
- put_bits(&s->pb, 2, s->height >> 12);
- 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, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
- put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
- }
-
- put_header(s, GOP_START_CODE);
- put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
- /* time code: we must convert from the real frame rate to a
- * fake MPEG frame rate in case of low frame rate */
- fps = (framerate.num + framerate.den / 2) / framerate.den;
- time_code = s->current_picture_ptr->f.coded_picture_number +
- s->avctx->timecode_frame_start;
-
- s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
-
- av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
- if (s->drop_frame_timecode)
- time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
-
- 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)));
- put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
- put_bits(&s->pb, 1, 0); // broken link
- }
-}
-
-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, ff_mpeg12_mbAddrIncrTable[run][1],
- ff_mpeg12_mbAddrIncrTable[run][0]);
-}
-
-static av_always_inline void put_qscale(MpegEncContext *s)
-{
- if (s->q_scale_type) {
- av_assert2(s->qscale >= 1 && s->qscale <= 12);
- put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
- } else {
- put_bits(&s->pb, 5, s->qscale);
- }
-}
-
-void ff_mpeg1_encode_slice_header(MpegEncContext *s)
-{
- if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
- put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
- /* slice_vertical_position_extension */
- put_bits(&s->pb, 3, s->mb_y >> 7);
- } else {
- put_header(s, SLICE_MIN_START_CODE + s->mb_y);
- }
- put_qscale(s);
- /* slice extra information */
- put_bits(&s->pb, 1, 0);
-}
-
-void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
-{
- AVFrameSideData *side_data;
- 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);
- put_bits(&s->pb, 3, s->pict_type);
-
- s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
- put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
-
- // RAL: Forward f_code also needed for B-frames
- if (s->pict_type == AV_PICTURE_TYPE_P ||
- s->pict_type == AV_PICTURE_TYPE_B) {
- put_bits(&s->pb, 1, 0); /* half pel coordinates */
- if (s->codec_id == AV_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 == AV_PICTURE_TYPE_B) {
- put_bits(&s->pb, 1, 0); /* half pel coordinates */
- if (s->codec_id == AV_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 */
-
- s->frame_pred_frame_dct = 1;
- if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
- put_header(s, EXT_START_CODE);
- put_bits(&s->pb, 4, 8); /* pic ext */
- if (s->pict_type == AV_PICTURE_TYPE_P ||
- s->pict_type == AV_PICTURE_TYPE_B) {
- 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 == AV_PICTURE_TYPE_B) {
- 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);
-
- av_assert0(s->picture_structure == PICT_FRAME);
- put_bits(&s->pb, 2, s->picture_structure);
- if (s->progressive_sequence)
- put_bits(&s->pb, 1, 0); /* no repeat */
- else
- put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
- /* XXX: optimize the generation of this flag with entropy measures */
- s->frame_pred_frame_dct = s->progressive_sequence;
-
- put_bits(&s->pb, 1, s->frame_pred_frame_dct);
- 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);
- s->progressive_frame = s->progressive_sequence;
- /* chroma_420_type */
- put_bits(&s->pb, 1, s->chroma_format ==
- CHROMA_420 ? s->progressive_frame : 0);
- put_bits(&s->pb, 1, s->progressive_frame);
- put_bits(&s->pb, 1, 0); /* composite_display_flag */
- }
- if (s->scan_offset) {
- int i;
-
- put_header(s, USER_START_CODE);
- for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
- put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
- }
- side_data = av_frame_get_side_data(&s->current_picture_ptr->f,
- AV_FRAME_DATA_STEREO3D);
- if (side_data) {
- AVStereo3D *stereo = (AVStereo3D *)side_data->data;
- uint8_t fpa_type;
-
- switch (stereo->type) {
- case AV_STEREO3D_SIDEBYSIDE:
- fpa_type = 0x03;
- break;
- case AV_STEREO3D_TOPBOTTOM:
- fpa_type = 0x04;
- break;
- case AV_STEREO3D_2D:
- fpa_type = 0x08;
- break;
- case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
- fpa_type = 0x23;
- break;
- default:
- fpa_type = 0;
- break;
- }
-
- if (fpa_type != 0) {
- put_header(s, USER_START_CODE);
- put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
- put_bits(&s->pb, 8, 'P');
- put_bits(&s->pb, 8, '3');
- put_bits(&s->pb, 8, 'D');
- put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
-
- put_bits(&s->pb, 1, 1); // reserved_bit
- put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
- put_bits(&s->pb, 8, 0x04); // reserved_data[0]
- put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
- }
- }
-
- s->mb_y = 0;
- ff_mpeg1_encode_slice_header(s);
-}
-
-static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
- int has_mv, int field_motion)
-{
- put_bits(&s->pb, n, bits);
- if (!s->frame_pred_frame_dct) {
- if (has_mv)
- /* motion_type: frame/field */
- put_bits(&s->pb, 2, 2 - field_motion);
- put_bits(&s->pb, 1, s->interlaced_dct);
- }
-}
-
-// RAL: Parameter added: f_or_b_code
-static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
-{
- if (val == 0) {
- /* zero vector */
- put_bits(&s->pb,
- ff_mpeg12_mbMotionVectorTable[0][1],
- ff_mpeg12_mbMotionVectorTable[0][0]);
- } else {
- int code, sign, bits;
- int bit_size = f_or_b_code - 1;
- int range = 1 << bit_size;
- /* modulo encoding */
- val = sign_extend(val, 5 + bit_size);
-
- 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;
- }
-
- av_assert2(code > 0 && code <= 16);
-
- put_bits(&s->pb,
- ff_mpeg12_mbMotionVectorTable[code][1],
- ff_mpeg12_mbMotionVectorTable[code][0]);
-
- put_bits(&s->pb, 1, sign);
- if (bit_size > 0)
- put_bits(&s->pb, bit_size, bits);
- }
-}
-
-static inline void encode_dc(MpegEncContext *s, int diff, int component)
-{
- if (((unsigned) (diff + 255)) >= 511) {
- int index;
-
- if (diff < 0) {
- index = av_log2_16bit(-2 * diff);
- diff--;
- } else {
- index = av_log2_16bit(2 * diff);
- }
- if (component == 0)
- put_bits(&s->pb,
- ff_mpeg12_vlc_dc_lum_bits[index] + index,
- (ff_mpeg12_vlc_dc_lum_code[index] << index) +
- (diff & ((1 << index) - 1)));
- else
- put_bits(&s->pb,
- ff_mpeg12_vlc_dc_chroma_bits[index] + index,
- (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
- (diff & ((1 << index) - 1)));
- } else {
- 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, int16_t *block, int n)
-{
- int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
- int code, component;
- const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
-
- last_index = s->block_last_index[n];
-
- /* DC coef */
- if (s->mb_intra) {
- component = (n <= 3 ? 0 : (n & 1) + 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)
- table_vlc = ff_rl_mpeg2.table_vlc;
- } 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:
- /* encode using VLC */
- if (level != 0) {
- run = i - last_non_zero - 1;
-
- alevel = level;
- MASK_ABS(sign, alevel);
- sign &= 1;
-
- 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, table_vlc[code][1] + 1,
- (table_vlc[code][0] << 1) + sign);
- } else {
- /* escape seems to be pretty rare <5% so I do not optimize it */
- put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
- /* escape: only clip in this case */
- put_bits(&s->pb, 6, run);
- if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
- if (alevel < 128) {
- put_sbits(&s->pb, 8, level);
- } else {
- if (level < 0)
- put_bits(&s->pb, 16, 0x8001 + level + 255);
- else
- put_sbits(&s->pb, 16, level);
- }
- } else {
- put_sbits(&s->pb, 12, level);
- }
- }
- last_non_zero = i;
- }
- }
- /* end of block */
- put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
-}
-
-static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
- int16_t block[6][64],
- int motion_x, int motion_y,
- int mb_block_count)
-{
- 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 < mb_block_count; i++)
- if (s->block_last_index[i] >= 0)
- cbp |= 1 << (mb_block_count - 1 - i);
-
- if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
- (mb_x != s->mb_width - 1 ||
- (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
- ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
- (s->pict_type == AV_PICTURE_TYPE_B && 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++;
- if (s->pict_type == AV_PICTURE_TYPE_P) {
- s->last_mv[0][0][0] =
- s->last_mv[0][0][1] =
- s->last_mv[0][1][0] =
- s->last_mv[0][1][1] = 0;
- }
- } else {
- if (first_mb) {
- av_assert0(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 == AV_PICTURE_TYPE_I) {
- if (s->dquant && cbp) {
- /* macroblock_type: macroblock_quant = 1 */
- put_mb_modes(s, 2, 1, 0, 0);
- put_qscale(s);
- } else {
- /* macroblock_type: macroblock_quant = 0 */
- put_mb_modes(s, 1, 1, 0, 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_mb_modes(s, 6, 0x01, 0, 0);
- put_qscale(s);
- } else {
- put_mb_modes(s, 5, 0x03, 0, 0);
- s->qscale -= s->dquant;
- }
- s->misc_bits += get_bits_diff(s);
- s->i_count++;
- memset(s->last_mv, 0, sizeof(s->last_mv));
- } else if (s->pict_type == AV_PICTURE_TYPE_P) {
- if (s->mv_type == MV_TYPE_16X16) {
- if (cbp != 0) {
- if ((motion_x | motion_y) == 0) {
- if (s->dquant) {
- /* macroblock_pattern & quant */
- put_mb_modes(s, 5, 1, 0, 0);
- put_qscale(s);
- } else {
- /* macroblock_pattern only */
- put_mb_modes(s, 2, 1, 0, 0);
- }
- s->misc_bits += get_bits_diff(s);
- } else {
- if (s->dquant) {
- put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
- put_qscale(s);
- } else {
- put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
- }
- s->misc_bits += get_bits_diff(s);
- // RAL: f_code parameter added
- 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);
- s->mv_bits += get_bits_diff(s);
- }
- } else {
- put_bits(&s->pb, 3, 1); /* motion only */
- if (!s->frame_pred_frame_dct)
- put_bits(&s->pb, 2, 2); /* motion_type: frame */
- s->misc_bits += get_bits_diff(s);
- // RAL: f_code parameter added
- 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);
- s->qscale -= s->dquant;
- s->mv_bits += get_bits_diff(s);
- }
- s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
- s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
- } else {
- av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
-
- if (cbp) {
- if (s->dquant) {
- put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
- put_qscale(s);
- } else {
- put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
- }
- } else {
- put_bits(&s->pb, 3, 1); /* motion only */
- put_bits(&s->pb, 2, 1); /* motion_type: field */
- s->qscale -= s->dquant;
- }
- s->misc_bits += get_bits_diff(s);
- for (i = 0; i < 2; i++) {
- put_bits(&s->pb, 1, s->field_select[0][i]);
- mpeg1_encode_motion(s,
- s->mv[0][i][0] - s->last_mv[0][i][0],
- s->f_code);
- mpeg1_encode_motion(s,
- s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
- s->f_code);
- s->last_mv[0][i][0] = s->mv[0][i][0];
- s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
- }
- s->mv_bits += get_bits_diff(s);
- }
- if (cbp) {
- if (s->chroma_y_shift) {
- put_bits(&s->pb,
- ff_mpeg12_mbPatTable[cbp][1],
- ff_mpeg12_mbPatTable[cbp][0]);
- } else {
- put_bits(&s->pb,
- ff_mpeg12_mbPatTable[cbp >> 2][1],
- ff_mpeg12_mbPatTable[cbp >> 2][0]);
- put_sbits(&s->pb, 2, cbp);
- }
- }
- s->f_count++;
- } else {
- if (s->mv_type == MV_TYPE_16X16) {
- if (cbp) { // With coded bloc pattern
- if (s->dquant) {
- if (s->mv_dir == MV_DIR_FORWARD)
- put_mb_modes(s, 6, 3, 1, 0);
- else
- put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
- put_qscale(s);
- } else {
- put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
- }
- } else { // No coded bloc pattern
- put_bits(&s->pb, 5 - s->mv_dir, 2);
- if (!s->frame_pred_frame_dct)
- put_bits(&s->pb, 2, 2); /* motion_type: frame */
- s->qscale -= s->dquant;
- }
- s->misc_bits += get_bits_diff(s);
- if (s->mv_dir & MV_DIR_FORWARD) {
- 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);
- 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) {
- 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->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 {
- av_assert2(s->mv_type == MV_TYPE_FIELD);
- av_assert2(!s->frame_pred_frame_dct);
- if (cbp) { // With coded bloc pattern
- if (s->dquant) {
- if (s->mv_dir == MV_DIR_FORWARD)
- put_mb_modes(s, 6, 3, 1, 1);
- else
- put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
- put_qscale(s);
- } else {
- put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
- }
- } else { // No coded bloc pattern
- put_bits(&s->pb, 5 - s->mv_dir, 2);
- put_bits(&s->pb, 2, 1); /* motion_type: field */
- s->qscale -= s->dquant;
- }
- s->misc_bits += get_bits_diff(s);
- if (s->mv_dir & MV_DIR_FORWARD) {
- for (i = 0; i < 2; i++) {
- put_bits(&s->pb, 1, s->field_select[0][i]);
- mpeg1_encode_motion(s,
- s->mv[0][i][0] - s->last_mv[0][i][0],
- s->f_code);
- mpeg1_encode_motion(s,
- s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
- 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++) {
- put_bits(&s->pb, 1, s->field_select[1][i]);
- mpeg1_encode_motion(s,
- s->mv[1][i][0] - s->last_mv[1][i][0],
- s->b_code);
- mpeg1_encode_motion(s,
- s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
- 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++;
- }
- }
- s->mv_bits += get_bits_diff(s);
- if (cbp) {
- if (s->chroma_y_shift) {
- put_bits(&s->pb,
- ff_mpeg12_mbPatTable[cbp][1],
- ff_mpeg12_mbPatTable[cbp][0]);
- } else {
- put_bits(&s->pb,
- ff_mpeg12_mbPatTable[cbp >> 2][1],
- ff_mpeg12_mbPatTable[cbp >> 2][0]);
- put_sbits(&s->pb, 2, cbp);
- }
- }
- }
- for (i = 0; i < mb_block_count; i++)
- if (cbp & (1 << (mb_block_count - 1 - 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);
- }
-}
-
-void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64],
- int motion_x, int motion_y)
-{
- if (s->chroma_format == CHROMA_420)
- mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
- else
- mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
-}
-
-av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
-{
- static int done = 0;
-
- ff_mpeg12_common_init(s);
-
- if (!done) {
- int f_code;
- int mv;
- int i;
-
- done = 1;
- ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
- ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
-
- for (i = 0; i < 64; i++) {
- mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
- mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
- }
-
- init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
- if (s->intra_vlc_format)
- init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
-
- /* build unified dc encoding tables */
- for (i = -255; i < 256; i++) {
- int adiff, index;
- int bits, code;
- int diff = i;
-
- adiff = FFABS(diff);
- if (diff < 0)
- diff--;
- index = av_log2(2 * adiff);
-
- bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
- code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
- (diff & ((1 << index) - 1));
- mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
-
- bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
- code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
- (diff & ((1 << index) - 1));
- mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
- }
-
- for (f_code = 1; f_code <= MAX_FCODE; f_code++)
- for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
- int len;
-
- if (mv == 0) {
- len = ff_mpeg12_mbMotionVectorTable[0][1];
- } else {
- int val, bit_size, code;
-
- bit_size = f_code - 1;
-
- val = mv;
- if (val < 0)
- val = -val;
- val--;
- code = (val >> bit_size) + 1;
- if (code < 17)
- len = ff_mpeg12_mbMotionVectorTable[code][1] +
- 1 + bit_size;
- else
- len = ff_mpeg12_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 << f_code); mv < (8 << f_code); mv++)
- fcode_tab[mv + MAX_MV] = f_code;
- }
- s->me.mv_penalty = mv_penalty;
- s->fcode_tab = fcode_tab;
- if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
- s->min_qcoeff = -255;
- s->max_qcoeff = 255;
- } else {
- s->min_qcoeff = -2047;
- s->max_qcoeff = 2047;
- }
- if (s->intra_vlc_format) {
- s->intra_ac_vlc_length =
- s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
- } else {
- s->intra_ac_vlc_length =
- s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
- }
- s->inter_ac_vlc_length =
- s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
-}
-
-#define OFFSET(x) offsetof(MpegEncContext, x)
-#define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
-#define COMMON_OPTS \
- { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", \
- OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
- { "intra_vlc", "Use MPEG-2 intra VLC table.", \
- OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
- { "drop_frame_timecode", "Timecode is in drop frame format.", \
- OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
- { "scan_offset", "Reserve space for SVCD scan offset user data.", \
- OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
-
-static const AVOption mpeg1_options[] = {
- COMMON_OPTS
- FF_MPV_COMMON_OPTS
- { NULL },
-};
-
-static const AVOption mpeg2_options[] = {
- COMMON_OPTS
- { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
- { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
- FF_MPV_COMMON_OPTS
- { NULL },
-};
-
-#define mpeg12_class(x) \
-static const AVClass mpeg ## x ## _class = { \
- .class_name = "mpeg" # x "video encoder", \
- .item_name = av_default_item_name, \
- .option = mpeg ## x ## _options, \
- .version = LIBAVUTIL_VERSION_INT, \
-};
-
-mpeg12_class(1)
-mpeg12_class(2)
-
-AVCodec ff_mpeg1video_encoder = {
- .name = "mpeg1video",
- .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_MPEG1VIDEO,
- .priv_data_size = sizeof(MpegEncContext),
- .init = encode_init,
- .encode2 = ff_MPV_encode_picture,
- .close = ff_MPV_encode_end,
- .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
- .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
- AV_PIX_FMT_NONE },
- .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
- .priv_class = &mpeg1_class,
-};
-
-AVCodec ff_mpeg2video_encoder = {
- .name = "mpeg2video",
- .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_MPEG2VIDEO,
- .priv_data_size = sizeof(MpegEncContext),
- .init = encode_init,
- .encode2 = ff_MPV_encode_picture,
- .close = ff_MPV_encode_end,
- .supported_framerates = ff_mpeg2_frame_rate_tab,
- .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
- AV_PIX_FMT_YUV422P,
- AV_PIX_FMT_NONE },
- .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
- .priv_class = &mpeg2_class,
-};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 13:19:10 +0000