WebSVN – Kolibri OS – Blame – /contrib/sdk/sources/ffmpeg/libavcodec/mpeg12enc.c

Rev	Author	Line No.	Line
4349	Serge	1	/*
		2	* MPEG1/2 encoder
		3	* Copyright (c) 2000,2001 Fabrice Bellard
		4	* Copyright (c) 2002-2004 Michael Niedermayer
		5	*
		6	* This file is part of FFmpeg.
		7	*
		8	* FFmpeg is free software; you can redistribute it and/or
		9	* modify it under the terms of the GNU Lesser General Public
		10	* License as published by the Free Software Foundation; either
		11	* version 2.1 of the License, or (at your option) any later version.
		12	*
		13	* FFmpeg is distributed in the hope that it will be useful,
		14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
		16	* Lesser General Public License for more details.
		17	*
		18	* You should have received a copy of the GNU Lesser General Public
		19	* License along with FFmpeg; if not, write to the Free Software
		20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
		21	*/
		22
		23	/**
		24	* @file
		25	* MPEG1/2 encoder
		26	*/
		27
		28	#include "libavutil/attributes.h"
		29	#include "libavutil/avassert.h"
		30	#include "libavutil/log.h"
		31	#include "libavutil/opt.h"
		32	#include "libavutil/timecode.h"
		33	#include "avcodec.h"
		34	#include "bytestream.h"
		35	#include "mathops.h"
		36	#include "mpeg12.h"
		37	#include "mpeg12data.h"
		38	#include "mpegvideo.h"
		39
		40
		41	static const uint8_t inv_non_linear_qscale[] = {
		42	0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
		43	};
		44
		45	static const uint8_t svcd_scan_offset_placeholder[] = {
		46	0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
		47	0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
		48	};
		49
		50	static uint8_t mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
		51	static uint8_t fcode_tab[MAX_MV * 2 + 1];
		52
		53	static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
		54	static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
		55
		56	/* simple include everything table for dc, first byte is bits
		57	* number next 3 are code */
		58	static uint32_t mpeg1_lum_dc_uni[512];
		59	static uint32_t mpeg1_chr_dc_uni[512];
		60
		61	static uint8_t mpeg1_index_run[2][64];
		62	static int8_t mpeg1_max_level[2][64];
		63
		64	static av_cold void init_uni_ac_vlc(RLTable rl, uint8_t uni_ac_vlc_len)
		65	{
		66	int i;
		67
		68	for (i = 0; i < 128; i++) {
		69	int level = i - 64;
		70	int run;
		71	if (!level)
		72	continue;
		73	for (run = 0; run < 64; run++) {
		74	int len, code;
		75	int alevel = FFABS(level);
		76
		77	if (alevel > rl->max_level[0][run])
		78	code = 111; /* rl->n */
		79	else
		80	code = rl->index_run[0][run] + alevel - 1;
		81
		82	if (code < 111) { /* rl->n */
		83	/* length of VLC and sign */
		84	len = rl->table_vlc[code][1] + 1;
		85	} else {
		86	len = rl->table_vlc[111 /* rl->n */][1] + 6;
		87
		88	if (alevel < 128)
		89	len += 8;
		90	else
		91	len += 16;
		92	}
		93
		94	uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
		95	}
		96	}
		97	}
		98
		99	static int find_frame_rate_index(MpegEncContext *s)
		100	{
		101	int i;
		102	AVRational bestq = (AVRational) {0, 0};
		103	AVRational ext;
		104	AVRational target = av_inv_q(s->avctx->time_base);
		105
		106	for (i = 1; i < 14; i++) {
		107	if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
		108	i >= 9)
		109	break;
		110
		111	for (ext.num=1; ext.num <= 4; ext.num++) {
		112	for (ext.den=1; ext.den <= 32; ext.den++) {
		113	AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
		114
		115	if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 \|\| ext.num!=1))
		116	continue;
		117	if (av_gcd(ext.den, ext.num) != 1)
		118	continue;
		119
		120	if ( bestq.num==0
		121	\|\| av_nearer_q(target, bestq, q) < 0
		122	\|\| ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
		123	bestq = q;
		124	s->frame_rate_index = i;
		125	s->mpeg2_frame_rate_ext.num = ext.num;
		126	s->mpeg2_frame_rate_ext.den = ext.den;
		127	}
		128	}
		129	}
		130	}
		131
		132	if (av_cmp_q(target, bestq))
		133	return -1;
		134	else
		135	return 0;
		136	}
		137
		138	static av_cold int encode_init(AVCodecContext *avctx)
		139	{
		140	MpegEncContext *s = avctx->priv_data;
		141
		142	if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)
		143	avctx->thread_count = 1;
		144
		145	if (ff_MPV_encode_init(avctx) < 0)
		146	return -1;
		147
		148	if (find_frame_rate_index(s) < 0) {
		149	if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
		150	av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
		151	avctx->time_base.den, avctx->time_base.num);
		152	return -1;
		153	} else {
		154	av_log(avctx, AV_LOG_INFO,
		155	"MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
		156	avctx->time_base.den, avctx->time_base.num);
		157	}
		158	}
		159
		160	if (avctx->profile == FF_PROFILE_UNKNOWN) {
		161	if (avctx->level != FF_LEVEL_UNKNOWN) {
		162	av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
		163	return -1;
		164	}
		165	/* Main or 4:2:2 */
		166	avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
		167	}
		168
		169	if (avctx->level == FF_LEVEL_UNKNOWN) {
		170	if (avctx->profile == 0) { /* 4:2:2 */
		171	if (avctx->width <= 720 && avctx->height <= 608)
		172	avctx->level = 5; /* Main */
		173	else
		174	avctx->level = 2; /* High */
		175	} else {
		176	if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
		177	av_log(avctx, AV_LOG_ERROR,
		178	"Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
		179	return -1;
		180	}
		181	if (avctx->width <= 720 && avctx->height <= 576)
		182	avctx->level = 8; /* Main */
		183	else if (avctx->width <= 1440)
		184	avctx->level = 6; /* High 1440 */
		185	else
		186	avctx->level = 4; /* High */
		187	}
		188	}
		189
		190	if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
		191	av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
		192	return AVERROR(EINVAL);
		193	}
		194
		195	if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
		196	if ((avctx->width & 0xFFF) == 0 \|\| (avctx->height & 0xFFF) == 0) {
		197	av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiplies of 4096\n"
		198	"add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
		199	return AVERROR(EINVAL);
		200	}
		201	}
		202
		203	s->drop_frame_timecode = s->drop_frame_timecode \|\| !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
		204	if (s->drop_frame_timecode)
		205	s->tc.flags \|= AV_TIMECODE_FLAG_DROPFRAME;
		206	if (s->drop_frame_timecode && s->frame_rate_index != 4) {
		207	av_log(avctx, AV_LOG_ERROR,
		208	"Drop frame time code only allowed with 1001/30000 fps\n");
		209	return -1;
		210	}
		211
		212	if (s->tc_opt_str) {
		213	AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
		214	int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
		215	if (ret < 0)
		216	return ret;
		217	s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
		218	s->avctx->timecode_frame_start = s->tc.start;
		219	} else {
		220	s->avctx->timecode_frame_start = 0; // default is -1
		221	}
		222	return 0;
		223	}
		224
		225	static void put_header(MpegEncContext *s, int header)
		226	{
		227	avpriv_align_put_bits(&s->pb);
		228	put_bits(&s->pb, 16, header >> 16);
		229	put_sbits(&s->pb, 16, header);
		230	}
		231
		232	/* put sequence header if needed */
		233	static void mpeg1_encode_sequence_header(MpegEncContext *s)
		234	{
		235	unsigned int vbv_buffer_size, fps, v;
		236	int i, constraint_parameter_flag;
		237	uint64_t time_code;
		238	float best_aspect_error = 1E10;
		239	float aspect_ratio = av_q2d(s->avctx->sample_aspect_ratio);
		240
		241	if (aspect_ratio == 0.0)
		242	aspect_ratio = 1.0; // pixel aspect 1.1 (VGA)
		243
		244	if (s->current_picture.f.key_frame) {
		245	AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
		246
		247	/* mpeg1 header repeated every gop */
		248	put_header(s, SEQ_START_CODE);
		249
		250	put_sbits(&s->pb, 12, s->width & 0xFFF);
		251	put_sbits(&s->pb, 12, s->height & 0xFFF);
		252
		253	for (i = 1; i < 15; i++) {
		254	float error = aspect_ratio;
		255	if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO \|\| i <= 1)
		256	error -= 1.0 / ff_mpeg1_aspect[i];
		257	else
		258	error -= av_q2d(ff_mpeg2_aspect[i]) * s->height / s->width;
		259
		260	error = FFABS(error);
		261
		262	if (error < best_aspect_error) {
		263	best_aspect_error = error;
		264	s->aspect_ratio_info = i;
		265	}
		266	}
		267
		268	put_bits(&s->pb, 4, s->aspect_ratio_info);
		269	put_bits(&s->pb, 4, s->frame_rate_index);
		270
		271	if (s->avctx->rc_max_rate) {
		272	v = (s->avctx->rc_max_rate + 399) / 400;
		273	if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
		274	v = 0x3ffff;
		275	} else {
		276	v = 0x3FFFF;
		277	}
		278
		279	if (s->avctx->rc_buffer_size)
		280	vbv_buffer_size = s->avctx->rc_buffer_size;
		281	else
		282	/* VBV calculation: Scaled so that a VCD has the proper
		283	* VBV size of 40 kilobytes */
		284	vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
		285	vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
		286
		287	put_sbits(&s->pb, 18, v);
		288	put_bits(&s->pb, 1, 1); // marker
		289	put_sbits(&s->pb, 10, vbv_buffer_size);
		290
		291	constraint_parameter_flag =
		292	s->width <= 768 &&
		293	s->height <= 576 &&
		294	s->mb_width * s->mb_height <= 396 &&
		295	s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
		296	framerate.num <= framerate.den * 30 &&
		297	s->avctx->me_range &&
		298	s->avctx->me_range < 128 &&
		299	vbv_buffer_size <= 20 &&
		300	v <= 1856000 / 400 &&
		301	s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
		302
		303	put_bits(&s->pb, 1, constraint_parameter_flag);
		304
		305	ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
		306	ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
		307
		308	if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
		309	put_header(s, EXT_START_CODE);
		310	put_bits(&s->pb, 4, 1); // seq ext
		311
		312	put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
		313
		314	put_bits(&s->pb, 3, s->avctx->profile); // profile
		315	put_bits(&s->pb, 4, s->avctx->level); // level
		316
		317	put_bits(&s->pb, 1, s->progressive_sequence);
		318	put_bits(&s->pb, 2, s->chroma_format);
		319	put_bits(&s->pb, 2, s->width >> 12);
		320	put_bits(&s->pb, 2, s->height >> 12);
		321	put_bits(&s->pb, 12, v >> 18); // bitrate ext
		322	put_bits(&s->pb, 1, 1); // marker
		323	put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
		324	put_bits(&s->pb, 1, s->low_delay);
		325	put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
		326	put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
		327	}
		328
		329	put_header(s, GOP_START_CODE);
		330	put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
		331	/* time code: we must convert from the real frame rate to a
		332	* fake MPEG frame rate in case of low frame rate */
		333	fps = (framerate.num + framerate.den / 2) / framerate.den;
		334	time_code = s->current_picture_ptr->f.coded_picture_number +
		335	s->avctx->timecode_frame_start;
		336
		337	s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
		338
		339	av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
		340	if (s->drop_frame_timecode)
		341	time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
		342
		343	put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
		344	put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
		345	put_bits(&s->pb, 1, 1);
		346	put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
		347	put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
		348	put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
		349	put_bits(&s->pb, 1, 0); // broken link
		350	}
		351	}
		352
		353	static inline void encode_mb_skip_run(MpegEncContext *s, int run)
		354	{
		355	while (run >= 33) {
		356	put_bits(&s->pb, 11, 0x008);
		357	run -= 33;
		358	}
		359	put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
		360	ff_mpeg12_mbAddrIncrTable[run][0]);
		361	}
		362
		363	static av_always_inline void put_qscale(MpegEncContext *s)
		364	{
		365	if (s->q_scale_type) {
		366	av_assert2(s->qscale >= 1 && s->qscale <= 12);
		367	put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
		368	} else {
		369	put_bits(&s->pb, 5, s->qscale);
		370	}
		371	}
		372
		373	void ff_mpeg1_encode_slice_header(MpegEncContext *s)
		374	{
		375	if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
		376	put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
		377	/* slice_vertical_position_extension */
		378	put_bits(&s->pb, 3, s->mb_y >> 7);
		379	} else {
		380	put_header(s, SLICE_MIN_START_CODE + s->mb_y);
		381	}
		382	put_qscale(s);
		383	/* slice extra information */
		384	put_bits(&s->pb, 1, 0);
		385	}
		386
		387	void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
		388	{
		389	mpeg1_encode_sequence_header(s);
		390
		391	/* mpeg1 picture header */
		392	put_header(s, PICTURE_START_CODE);
		393	/* temporal reference */
		394
		395	// RAL: s->picture_number instead of s->fake_picture_number
		396	put_bits(&s->pb, 10,
		397	(s->picture_number - s->gop_picture_number) & 0x3ff);
		398	put_bits(&s->pb, 3, s->pict_type);
		399
		400	s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
		401	put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
		402
		403	// RAL: Forward f_code also needed for B-frames
		404	if (s->pict_type == AV_PICTURE_TYPE_P \|\|
		405	s->pict_type == AV_PICTURE_TYPE_B) {
		406	put_bits(&s->pb, 1, 0); /* half pel coordinates */
		407	if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
		408	put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
		409	else
		410	put_bits(&s->pb, 3, 7); /* forward_f_code */
		411	}
		412
		413	// RAL: Backward f_code necessary for B-frames
		414	if (s->pict_type == AV_PICTURE_TYPE_B) {
		415	put_bits(&s->pb, 1, 0); /* half pel coordinates */
		416	if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
		417	put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
		418	else
		419	put_bits(&s->pb, 3, 7); /* backward_f_code */
		420	}
		421
		422	put_bits(&s->pb, 1, 0); /* extra bit picture */
		423
		424	s->frame_pred_frame_dct = 1;
		425	if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
		426	put_header(s, EXT_START_CODE);
		427	put_bits(&s->pb, 4, 8); /* pic ext */
		428	if (s->pict_type == AV_PICTURE_TYPE_P \|\|
		429	s->pict_type == AV_PICTURE_TYPE_B) {
		430	put_bits(&s->pb, 4, s->f_code);
		431	put_bits(&s->pb, 4, s->f_code);
		432	} else {
		433	put_bits(&s->pb, 8, 255);
		434	}
		435	if (s->pict_type == AV_PICTURE_TYPE_B) {
		436	put_bits(&s->pb, 4, s->b_code);
		437	put_bits(&s->pb, 4, s->b_code);
		438	} else {
		439	put_bits(&s->pb, 8, 255);
		440	}
		441	put_bits(&s->pb, 2, s->intra_dc_precision);
		442
		443	av_assert0(s->picture_structure == PICT_FRAME);
		444	put_bits(&s->pb, 2, s->picture_structure);
		445	if (s->progressive_sequence)
		446	put_bits(&s->pb, 1, 0); /* no repeat */
		447	else
		448	put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
		449	/* XXX: optimize the generation of this flag with entropy measures */
		450	s->frame_pred_frame_dct = s->progressive_sequence;
		451
		452	put_bits(&s->pb, 1, s->frame_pred_frame_dct);
		453	put_bits(&s->pb, 1, s->concealment_motion_vectors);
		454	put_bits(&s->pb, 1, s->q_scale_type);
		455	put_bits(&s->pb, 1, s->intra_vlc_format);
		456	put_bits(&s->pb, 1, s->alternate_scan);
		457	put_bits(&s->pb, 1, s->repeat_first_field);
		458	s->progressive_frame = s->progressive_sequence;
		459	/* chroma_420_type */
		460	put_bits(&s->pb, 1, s->chroma_format ==
		461	CHROMA_420 ? s->progressive_frame : 0);
		462	put_bits(&s->pb, 1, s->progressive_frame);
		463	put_bits(&s->pb, 1, 0); /* composite_display_flag */
		464	}
		465	if (s->scan_offset) {
		466	int i;
		467
		468	put_header(s, USER_START_CODE);
		469	for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
		470	put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
		471	}
		472
		473	s->mb_y = 0;
		474	ff_mpeg1_encode_slice_header(s);
		475	}
		476
		477	static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
		478	int has_mv, int field_motion)
		479	{
		480	put_bits(&s->pb, n, bits);
		481	if (!s->frame_pred_frame_dct) {
		482	if (has_mv)
		483	/* motion_type: frame/field */
		484	put_bits(&s->pb, 2, 2 - field_motion);
		485	put_bits(&s->pb, 1, s->interlaced_dct);
		486	}
		487	}
		488
		489	// RAL: Parameter added: f_or_b_code
		490	static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
		491	{
		492	if (val == 0) {
		493	/* zero vector */
		494	put_bits(&s->pb,
		495	ff_mpeg12_mbMotionVectorTable[0][1],
		496	ff_mpeg12_mbMotionVectorTable[0][0]);
		497	} else {
		498	int code, sign, bits;
		499	int bit_size = f_or_b_code - 1;
		500	int range = 1 << bit_size;
		501	/* modulo encoding */
		502	val = sign_extend(val, 5 + bit_size);
		503
		504	if (val >= 0) {
		505	val--;
		506	code = (val >> bit_size) + 1;
		507	bits = val & (range - 1);
		508	sign = 0;
		509	} else {
		510	val = -val;
		511	val--;
		512	code = (val >> bit_size) + 1;
		513	bits = val & (range - 1);
		514	sign = 1;
		515	}
		516
		517	av_assert2(code > 0 && code <= 16);
		518
		519	put_bits(&s->pb,
		520	ff_mpeg12_mbMotionVectorTable[code][1],
		521	ff_mpeg12_mbMotionVectorTable[code][0]);
		522
		523	put_bits(&s->pb, 1, sign);
		524	if (bit_size > 0)
		525	put_bits(&s->pb, bit_size, bits);
		526	}
		527	}
		528
		529	static inline void encode_dc(MpegEncContext *s, int diff, int component)
		530	{
		531	if (((unsigned) (diff + 255)) >= 511) {
		532	int index;
		533
		534	if (diff < 0) {
		535	index = av_log2_16bit(-2 * diff);
		536	diff--;
		537	} else {
		538	index = av_log2_16bit(2 * diff);
		539	}
		540	if (component == 0)
		541	put_bits(&s->pb,
		542	ff_mpeg12_vlc_dc_lum_bits[index] + index,
		543	(ff_mpeg12_vlc_dc_lum_code[index] << index) +
		544	(diff & ((1 << index) - 1)));
		545	else
		546	put_bits(&s->pb,
		547	ff_mpeg12_vlc_dc_chroma_bits[index] + index,
		548	(ff_mpeg12_vlc_dc_chroma_code[index] << index) +
		549	(diff & ((1 << index) - 1)));
		550	} else {
		551	if (component == 0)
		552	put_bits(&s->pb,
		553	mpeg1_lum_dc_uni[diff + 255] & 0xFF,
		554	mpeg1_lum_dc_uni[diff + 255] >> 8);
		555	else
		556	put_bits(&s->pb,
		557	mpeg1_chr_dc_uni[diff + 255] & 0xFF,
		558	mpeg1_chr_dc_uni[diff + 255] >> 8);
		559	}
		560	}
		561
		562	static void mpeg1_encode_block(MpegEncContext s, int16_t block, int n)
		563	{
		564	int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
		565	int code, component;
		566	const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
		567
		568	last_index = s->block_last_index[n];
		569
		570	/* DC coef */
		571	if (s->mb_intra) {
		572	component = (n <= 3 ? 0 : (n & 1) + 1);
		573	dc = block[0]; /* overflow is impossible */
		574	diff = dc - s->last_dc[component];
		575	encode_dc(s, diff, component);
		576	s->last_dc[component] = dc;
		577	i = 1;
		578	if (s->intra_vlc_format)
		579	table_vlc = ff_rl_mpeg2.table_vlc;
		580	} else {
		581	/* encode the first coefficient: needs to be done here because
		582	* it is handled slightly differently */
		583	level = block[0];
		584	if (abs(level) == 1) {
		585	code = ((uint32_t)level >> 31); /* the sign bit */
		586	put_bits(&s->pb, 2, code \| 0x02);
		587	i = 1;
		588	} else {
		589	i = 0;
		590	last_non_zero = -1;
		591	goto next_coef;
		592	}
		593	}
		594
		595	/* now quantify & encode AC coefs */
		596	last_non_zero = i - 1;
		597
		598	for (; i <= last_index; i++) {
		599	j = s->intra_scantable.permutated[i];
		600	level = block[j];
		601
		602	next_coef:
		603	/* encode using VLC */
		604	if (level != 0) {
		605	run = i - last_non_zero - 1;
		606
		607	alevel = level;
		608	MASK_ABS(sign, alevel);
		609	sign &= 1;
		610
		611	if (alevel <= mpeg1_max_level[0][run]) {
		612	code = mpeg1_index_run[0][run] + alevel - 1;
		613	/* store the VLC & sign at once */
		614	put_bits(&s->pb, table_vlc[code][1] + 1,
		615	(table_vlc[code][0] << 1) + sign);
		616	} else {
		617	/* escape seems to be pretty rare <5% so I do not optimize it */
		618	put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
		619	/* escape: only clip in this case */
		620	put_bits(&s->pb, 6, run);
		621	if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
		622	if (alevel < 128) {
		623	put_sbits(&s->pb, 8, level);
		624	} else {
		625	if (level < 0)
		626	put_bits(&s->pb, 16, 0x8001 + level + 255);
		627	else
		628	put_sbits(&s->pb, 16, level);
		629	}
		630	} else {
		631	put_sbits(&s->pb, 12, level);
		632	}
		633	}
		634	last_non_zero = i;
		635	}
		636	}
		637	/* end of block */
		638	put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
		639	}
		640
		641	static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
		642	int16_t block[6][64],
		643	int motion_x, int motion_y,
		644	int mb_block_count)
		645	{
		646	int i, cbp;
		647	const int mb_x = s->mb_x;
		648	const int mb_y = s->mb_y;
		649	const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
		650
		651	/* compute cbp */
		652	cbp = 0;
		653	for (i = 0; i < mb_block_count; i++)
		654	if (s->block_last_index[i] >= 0)
		655	cbp \|= 1 << (mb_block_count - 1 - i);
		656
		657	if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
		658	(mb_x != s->mb_width - 1 \|\|
		659	(mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
		660	((s->pict_type == AV_PICTURE_TYPE_P && (motion_x \| motion_y) == 0) \|\|
		661	(s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
		662	(((s->mv_dir & MV_DIR_FORWARD)
		663	? ((s->mv[0][0][0] - s->last_mv[0][0][0]) \|
		664	(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) \|
		665	((s->mv_dir & MV_DIR_BACKWARD)
		666	? ((s->mv[1][0][0] - s->last_mv[1][0][0]) \|
		667	(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
		668	s->mb_skip_run++;
		669	s->qscale -= s->dquant;
		670	s->skip_count++;
		671	s->misc_bits++;
		672	s->last_bits++;
		673	if (s->pict_type == AV_PICTURE_TYPE_P) {
		674	s->last_mv[0][0][0] =
		675	s->last_mv[0][0][1] =
		676	s->last_mv[0][1][0] =
		677	s->last_mv[0][1][1] = 0;
		678	}
		679	} else {
		680	if (first_mb) {
		681	av_assert0(s->mb_skip_run == 0);
		682	encode_mb_skip_run(s, s->mb_x);
		683	} else {
		684	encode_mb_skip_run(s, s->mb_skip_run);
		685	}
		686
		687	if (s->pict_type == AV_PICTURE_TYPE_I) {
		688	if (s->dquant && cbp) {
		689	/* macroblock_type: macroblock_quant = 1 */
		690	put_mb_modes(s, 2, 1, 0, 0);
		691	put_qscale(s);
		692	} else {
		693	/* macroblock_type: macroblock_quant = 0 */
		694	put_mb_modes(s, 1, 1, 0, 0);
		695	s->qscale -= s->dquant;
		696	}
		697	s->misc_bits += get_bits_diff(s);
		698	s->i_count++;
		699	} else if (s->mb_intra) {
		700	if (s->dquant && cbp) {
		701	put_mb_modes(s, 6, 0x01, 0, 0);
		702	put_qscale(s);
		703	} else {
		704	put_mb_modes(s, 5, 0x03, 0, 0);
		705	s->qscale -= s->dquant;
		706	}
		707	s->misc_bits += get_bits_diff(s);
		708	s->i_count++;
		709	memset(s->last_mv, 0, sizeof(s->last_mv));
		710	} else if (s->pict_type == AV_PICTURE_TYPE_P) {
		711	if (s->mv_type == MV_TYPE_16X16) {
		712	if (cbp != 0) {
		713	if ((motion_x \| motion_y) == 0) {
		714	if (s->dquant) {
		715	/* macroblock_pattern & quant */
		716	put_mb_modes(s, 5, 1, 0, 0);
		717	put_qscale(s);
		718	} else {
		719	/* macroblock_pattern only */
		720	put_mb_modes(s, 2, 1, 0, 0);
		721	}
		722	s->misc_bits += get_bits_diff(s);
		723	} else {
		724	if (s->dquant) {
		725	put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
		726	put_qscale(s);
		727	} else {
		728	put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
		729	}
		730	s->misc_bits += get_bits_diff(s);
		731	// RAL: f_code parameter added
		732	mpeg1_encode_motion(s,
		733	motion_x - s->last_mv[0][0][0],
		734	s->f_code);
		735	// RAL: f_code parameter added
		736	mpeg1_encode_motion(s,
		737	motion_y - s->last_mv[0][0][1],
		738	s->f_code);
		739	s->mv_bits += get_bits_diff(s);
		740	}
		741	} else {
		742	put_bits(&s->pb, 3, 1); /* motion only */
		743	if (!s->frame_pred_frame_dct)
		744	put_bits(&s->pb, 2, 2); /* motion_type: frame */
		745	s->misc_bits += get_bits_diff(s);
		746	// RAL: f_code parameter added
		747	mpeg1_encode_motion(s,
		748	motion_x - s->last_mv[0][0][0],
		749	s->f_code);
		750	// RAL: f_code parameter added
		751	mpeg1_encode_motion(s,
		752	motion_y - s->last_mv[0][0][1],
		753	s->f_code);
		754	s->qscale -= s->dquant;
		755	s->mv_bits += get_bits_diff(s);
		756	}
		757	s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
		758	s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
		759	} else {
		760	av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
		761
		762	if (cbp) {
		763	if (s->dquant) {
		764	put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
		765	put_qscale(s);
		766	} else {
		767	put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
		768	}
		769	} else {
		770	put_bits(&s->pb, 3, 1); /* motion only */
		771	put_bits(&s->pb, 2, 1); /* motion_type: field */
		772	s->qscale -= s->dquant;
		773	}
		774	s->misc_bits += get_bits_diff(s);
		775	for (i = 0; i < 2; i++) {
		776	put_bits(&s->pb, 1, s->field_select[0][i]);
		777	mpeg1_encode_motion(s,
		778	s->mv[0][i][0] - s->last_mv[0][i][0],
		779	s->f_code);
		780	mpeg1_encode_motion(s,
		781	s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
		782	s->f_code);
		783	s->last_mv[0][i][0] = s->mv[0][i][0];
		784	s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
		785	}
		786	s->mv_bits += get_bits_diff(s);
		787	}
		788	if (cbp) {
		789	if (s->chroma_y_shift) {
		790	put_bits(&s->pb,
		791	ff_mpeg12_mbPatTable[cbp][1],
		792	ff_mpeg12_mbPatTable[cbp][0]);
		793	} else {
		794	put_bits(&s->pb,
		795	ff_mpeg12_mbPatTable[cbp >> 2][1],
		796	ff_mpeg12_mbPatTable[cbp >> 2][0]);
		797	put_sbits(&s->pb, 2, cbp);
		798	}
		799	}
		800	s->f_count++;
		801	} else {
		802	if (s->mv_type == MV_TYPE_16X16) {
		803	if (cbp) { // With coded bloc pattern
		804	if (s->dquant) {
		805	if (s->mv_dir == MV_DIR_FORWARD)
		806	put_mb_modes(s, 6, 3, 1, 0);
		807	else
		808	put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
		809	put_qscale(s);
		810	} else {
		811	put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
		812	}
		813	} else { // No coded bloc pattern
		814	put_bits(&s->pb, 5 - s->mv_dir, 2);
		815	if (!s->frame_pred_frame_dct)
		816	put_bits(&s->pb, 2, 2); /* motion_type: frame */
		817	s->qscale -= s->dquant;
		818	}
		819	s->misc_bits += get_bits_diff(s);
		820	if (s->mv_dir & MV_DIR_FORWARD) {
		821	mpeg1_encode_motion(s,
		822	s->mv[0][0][0] - s->last_mv[0][0][0],
		823	s->f_code);
		824	mpeg1_encode_motion(s,
		825	s->mv[0][0][1] - s->last_mv[0][0][1],
		826	s->f_code);
		827	s->last_mv[0][0][0] =
		828	s->last_mv[0][1][0] = s->mv[0][0][0];
		829	s->last_mv[0][0][1] =
		830	s->last_mv[0][1][1] = s->mv[0][0][1];
		831	s->f_count++;
		832	}
		833	if (s->mv_dir & MV_DIR_BACKWARD) {
		834	mpeg1_encode_motion(s,
		835	s->mv[1][0][0] - s->last_mv[1][0][0],
		836	s->b_code);
		837	mpeg1_encode_motion(s,
		838	s->mv[1][0][1] - s->last_mv[1][0][1],
		839	s->b_code);
		840	s->last_mv[1][0][0] =
		841	s->last_mv[1][1][0] = s->mv[1][0][0];
		842	s->last_mv[1][0][1] =
		843	s->last_mv[1][1][1] = s->mv[1][0][1];
		844	s->b_count++;
		845	}
		846	} else {
		847	av_assert2(s->mv_type == MV_TYPE_FIELD);
		848	av_assert2(!s->frame_pred_frame_dct);
		849	if (cbp) { // With coded bloc pattern
		850	if (s->dquant) {
		851	if (s->mv_dir == MV_DIR_FORWARD)
		852	put_mb_modes(s, 6, 3, 1, 1);
		853	else
		854	put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
		855	put_qscale(s);
		856	} else {
		857	put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
		858	}
		859	} else { // No coded bloc pattern
		860	put_bits(&s->pb, 5 - s->mv_dir, 2);
		861	put_bits(&s->pb, 2, 1); /* motion_type: field */
		862	s->qscale -= s->dquant;
		863	}
		864	s->misc_bits += get_bits_diff(s);
		865	if (s->mv_dir & MV_DIR_FORWARD) {
		866	for (i = 0; i < 2; i++) {
		867	put_bits(&s->pb, 1, s->field_select[0][i]);
		868	mpeg1_encode_motion(s,
		869	s->mv[0][i][0] - s->last_mv[0][i][0],
		870	s->f_code);
		871	mpeg1_encode_motion(s,
		872	s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
		873	s->f_code);
		874	s->last_mv[0][i][0] = s->mv[0][i][0];
		875	s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
		876	}
		877	s->f_count++;
		878	}
		879	if (s->mv_dir & MV_DIR_BACKWARD) {
		880	for (i = 0; i < 2; i++) {
		881	put_bits(&s->pb, 1, s->field_select[1][i]);
		882	mpeg1_encode_motion(s,
		883	s->mv[1][i][0] - s->last_mv[1][i][0],
		884	s->b_code);
		885	mpeg1_encode_motion(s,
		886	s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
		887	s->b_code);
		888	s->last_mv[1][i][0] = s->mv[1][i][0];
		889	s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
		890	}
		891	s->b_count++;
		892	}
		893	}
		894	s->mv_bits += get_bits_diff(s);
		895	if (cbp) {
		896	if (s->chroma_y_shift) {
		897	put_bits(&s->pb,
		898	ff_mpeg12_mbPatTable[cbp][1],
		899	ff_mpeg12_mbPatTable[cbp][0]);
		900	} else {
		901	put_bits(&s->pb,
		902	ff_mpeg12_mbPatTable[cbp >> 2][1],
		903	ff_mpeg12_mbPatTable[cbp >> 2][0]);
		904	put_sbits(&s->pb, 2, cbp);
		905	}
		906	}
		907	}
		908	for (i = 0; i < mb_block_count; i++)
		909	if (cbp & (1 << (mb_block_count - 1 - i)))
		910	mpeg1_encode_block(s, block[i], i);
		911	s->mb_skip_run = 0;
		912	if (s->mb_intra)
		913	s->i_tex_bits += get_bits_diff(s);
		914	else
		915	s->p_tex_bits += get_bits_diff(s);
		916	}
		917	}
		918
		919	void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64],
		920	int motion_x, int motion_y)
		921	{
		922	if (s->chroma_format == CHROMA_420)
		923	mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
		924	else
		925	mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
		926	}
		927
		928	av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
		929	{
		930	static int done = 0;
		931
		932	ff_mpeg12_common_init(s);
		933
		934	if (!done) {
		935	int f_code;
		936	int mv;
		937	int i;
		938
		939	done = 1;
		940	ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
		941	ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
		942
		943	for (i = 0; i < 64; i++) {
		944	mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
		945	mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
		946	}
		947
		948	init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
		949	if (s->intra_vlc_format)
		950	init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
		951
		952	/* build unified dc encoding tables */
		953	for (i = -255; i < 256; i++) {
		954	int adiff, index;
		955	int bits, code;
		956	int diff = i;
		957
		958	adiff = FFABS(diff);
		959	if (diff < 0)
		960	diff--;
		961	index = av_log2(2 * adiff);
		962
		963	bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
		964	code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
		965	(diff & ((1 << index) - 1));
		966	mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
		967
		968	bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
		969	code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
		970	(diff & ((1 << index) - 1));
		971	mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
		972	}
		973
		974	for (f_code = 1; f_code <= MAX_FCODE; f_code++)
		975	for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
		976	int len;
		977
		978	if (mv == 0) {
		979	len = ff_mpeg12_mbMotionVectorTable[0][1];
		980	} else {
		981	int val, bit_size, code;
		982
		983	bit_size = f_code - 1;
		984
		985	val = mv;
		986	if (val < 0)
		987	val = -val;
		988	val--;
		989	code = (val >> bit_size) + 1;
		990	if (code < 17)
		991	len = ff_mpeg12_mbMotionVectorTable[code][1] +
		992	1 + bit_size;
		993	else
		994	len = ff_mpeg12_mbMotionVectorTable[16][1] +
		995	2 + bit_size;
		996	}
		997
		998	mv_penalty[f_code][mv + MAX_MV] = len;
		999	}
		1000
		1001
		1002	for (f_code = MAX_FCODE; f_code > 0; f_code--)
		1003	for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
		1004	fcode_tab[mv + MAX_MV] = f_code;
		1005	}
		1006	s->me.mv_penalty = mv_penalty;
		1007	s->fcode_tab = fcode_tab;
		1008	if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
		1009	s->min_qcoeff = -255;
		1010	s->max_qcoeff = 255;
		1011	} else {
		1012	s->min_qcoeff = -2047;
		1013	s->max_qcoeff = 2047;
		1014	}
		1015	if (s->intra_vlc_format) {
		1016	s->intra_ac_vlc_length =
		1017	s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
		1018	} else {
		1019	s->intra_ac_vlc_length =
		1020	s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
		1021	}
		1022	s->inter_ac_vlc_length =
		1023	s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
		1024	}
		1025
		1026	#define OFFSET(x) offsetof(MpegEncContext, x)
		1027	#define VE AV_OPT_FLAG_ENCODING_PARAM \| AV_OPT_FLAG_VIDEO_PARAM
		1028	#define COMMON_OPTS \
		1029	{ "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", \
		1030	OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
		1031	{ "intra_vlc", "Use MPEG-2 intra VLC table.", \
		1032	OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
		1033	{ "drop_frame_timecode", "Timecode is in drop frame format.", \
		1034	OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
		1035	{ "scan_offset", "Reserve space for SVCD scan offset user data.", \
		1036	OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
		1037
		1038	static const AVOption mpeg1_options[] = {
		1039	COMMON_OPTS
		1040	FF_MPV_COMMON_OPTS
		1041	{ NULL },
		1042	};
		1043
		1044	static const AVOption mpeg2_options[] = {
		1045	COMMON_OPTS
		1046	{ "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
		1047	{ "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
		1048	FF_MPV_COMMON_OPTS
		1049	{ NULL },
		1050	};
		1051
		1052	#define mpeg12_class(x) \
		1053	static const AVClass mpeg ## x ## _class = { \
		1054	.class_name = "mpeg" # x "video encoder", \
		1055	.item_name = av_default_item_name, \
		1056	.option = mpeg ## x ## _options, \
		1057	.version = LIBAVUTIL_VERSION_INT, \
		1058	};
		1059
		1060	mpeg12_class(1)
		1061	mpeg12_class(2)
		1062
		1063	AVCodec ff_mpeg1video_encoder = {
		1064	.name = "mpeg1video",
		1065	.long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
		1066	.type = AVMEDIA_TYPE_VIDEO,
		1067	.id = AV_CODEC_ID_MPEG1VIDEO,
		1068	.priv_data_size = sizeof(MpegEncContext),
		1069	.init = encode_init,
		1070	.encode2 = ff_MPV_encode_picture,
		1071	.close = ff_MPV_encode_end,
		1072	.supported_framerates = ff_mpeg12_frame_rate_tab + 1,
		1073	.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
		1074	AV_PIX_FMT_NONE },
		1075	.capabilities = CODEC_CAP_DELAY \| CODEC_CAP_SLICE_THREADS,
		1076	.priv_class = &mpeg1_class,
		1077	};
		1078
		1079	AVCodec ff_mpeg2video_encoder = {
		1080	.name = "mpeg2video",
		1081	.long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
		1082	.type = AVMEDIA_TYPE_VIDEO,
		1083	.id = AV_CODEC_ID_MPEG2VIDEO,
		1084	.priv_data_size = sizeof(MpegEncContext),
		1085	.init = encode_init,
		1086	.encode2 = ff_MPV_encode_picture,
		1087	.close = ff_MPV_encode_end,
		1088	.supported_framerates = ff_mpeg2_frame_rate_tab,
		1089	.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
		1090	AV_PIX_FMT_YUV422P,
		1091	AV_PIX_FMT_NONE },
		1092	.capabilities = CODEC_CAP_DELAY \| CODEC_CAP_SLICE_THREADS,
		1093	.priv_class = &mpeg2_class,
		1094	};

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(root)/contrib/sdk/sources/ffmpeg/libavcodec/mpeg12enc.c @ 4930 – Rev 4349