WebSVN – Kolibri OS – Blame – /contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavcodec/mpeg12enc.c

Rev	Author	Line No.	Line
6147	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
		29
		30	#include "libavutil/attributes.h"
		31	#include "libavutil/avassert.h"
		32	#include "libavutil/log.h"
		33	#include "libavutil/opt.h"
		34	#include "libavutil/timecode.h"
		35	#include "libavutil/stereo3d.h"
		36
		37	#include "avcodec.h"
		38	#include "bytestream.h"
		39	#include "mathops.h"
		40	#include "mpeg12.h"
		41	#include "mpeg12data.h"
		42	#include "mpegutils.h"
		43	#include "mpegvideo.h"
		44
		45	static const int8_t inv_non_linear_qscale[] = {
		46	0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
		47	-1,17,-1,18,-1,19, -1, 20, -1, 21, -1, 22, -1,
		48	23,-1,24,-1,-1,-1
		49	};
		50
		51	static const uint8_t svcd_scan_offset_placeholder[] = {
		52	0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
		53	0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
		54	};
		55
		56	static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
		57	static uint8_t fcode_tab[MAX_MV * 2 + 1];
		58
		59	static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
		60	static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
		61
		62	/* simple include everything table for dc, first byte is bits
		63	* number next 3 are code */
		64	static uint32_t mpeg1_lum_dc_uni[512];
		65	static uint32_t mpeg1_chr_dc_uni[512];
		66
		67	static uint8_t mpeg1_index_run[2][64];
		68	static int8_t mpeg1_max_level[2][64];
		69
		70	static av_cold void init_uni_ac_vlc(RLTable rl, uint8_t uni_ac_vlc_len)
		71	{
		72	int i;
		73
		74	for (i = 0; i < 128; i++) {
		75	int level = i - 64;
		76	int run;
		77	if (!level)
		78	continue;
		79	for (run = 0; run < 64; run++) {
		80	int len, code;
		81	int alevel = FFABS(level);
		82
		83	if (alevel > rl->max_level[0][run])
		84	code = 111; /* rl->n */
		85	else
		86	code = rl->index_run[0][run] + alevel - 1;
		87
		88	if (code < 111) { /* rl->n */
		89	/* length of VLC and sign */
		90	len = rl->table_vlc[code][1] + 1;
		91	} else {
		92	len = rl->table_vlc[111 /* rl->n */][1] + 6;
		93
		94	if (alevel < 128)
		95	len += 8;
		96	else
		97	len += 16;
		98	}
		99
		100	uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
		101	}
		102	}
		103	}
		104
		105	static int find_frame_rate_index(MpegEncContext *s)
		106	{
		107	int i;
		108	AVRational bestq = (AVRational) {0, 0};
		109	AVRational ext;
		110	AVRational target = av_inv_q(s->avctx->time_base);
		111
		112	for (i = 1; i < 14; i++) {
		113	if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
		114	i >= 9)
		115	break;
		116
		117	for (ext.num=1; ext.num <= 4; ext.num++) {
		118	for (ext.den=1; ext.den <= 32; ext.den++) {
		119	AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
		120
		121	if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 \|\| ext.num!=1))
		122	continue;
		123	if (av_gcd(ext.den, ext.num) != 1)
		124	continue;
		125
		126	if ( bestq.num==0
		127	\|\| av_nearer_q(target, bestq, q) < 0
		128	\|\| ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
		129	bestq = q;
		130	s->frame_rate_index = i;
		131	s->mpeg2_frame_rate_ext.num = ext.num;
		132	s->mpeg2_frame_rate_ext.den = ext.den;
		133	}
		134	}
		135	}
		136	}
		137
		138	if (av_cmp_q(target, bestq))
		139	return -1;
		140	else
		141	return 0;
		142	}
		143
		144	static av_cold int encode_init(AVCodecContext *avctx)
		145	{
		146	MpegEncContext *s = avctx->priv_data;
		147
		148	if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)
		149	avctx->thread_count = 1;
		150
		151	if (ff_mpv_encode_init(avctx) < 0)
		152	return -1;
		153
		154	if (find_frame_rate_index(s) < 0) {
		155	if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
		156	av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
		157	avctx->time_base.den, avctx->time_base.num);
		158	return -1;
		159	} else {
		160	av_log(avctx, AV_LOG_INFO,
		161	"MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
		162	avctx->time_base.den, avctx->time_base.num);
		163	}
		164	}
		165
		166	if (avctx->profile == FF_PROFILE_UNKNOWN) {
		167	if (avctx->level != FF_LEVEL_UNKNOWN) {
		168	av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
		169	return -1;
		170	}
		171	/* Main or 4:2:2 */
		172	avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
		173	}
		174
		175	if (avctx->level == FF_LEVEL_UNKNOWN) {
		176	if (avctx->profile == 0) { /* 4:2:2 */
		177	if (avctx->width <= 720 && avctx->height <= 608)
		178	avctx->level = 5; /* Main */
		179	else
		180	avctx->level = 2; /* High */
		181	} else {
		182	if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
		183	av_log(avctx, AV_LOG_ERROR,
		184	"Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
		185	return -1;
		186	}
		187	if (avctx->width <= 720 && avctx->height <= 576)
		188	avctx->level = 8; /* Main */
		189	else if (avctx->width <= 1440)
		190	avctx->level = 6; /* High 1440 */
		191	else
		192	avctx->level = 4; /* High */
		193	}
		194	}
		195
		196	if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
		197	av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
		198	return AVERROR(EINVAL);
		199	}
		200
		201	if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
		202	if ((avctx->width & 0xFFF) == 0 \|\| (avctx->height & 0xFFF) == 0) {
		203	av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
		204	"add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
		205	return AVERROR(EINVAL);
		206	}
		207	}
		208
		209	s->drop_frame_timecode = s->drop_frame_timecode \|\| !!(avctx->flags2 & AV_CODEC_FLAG2_DROP_FRAME_TIMECODE);
		210	if (s->drop_frame_timecode)
		211	s->tc.flags \|= AV_TIMECODE_FLAG_DROPFRAME;
		212	if (s->drop_frame_timecode && s->frame_rate_index != 4) {
		213	av_log(avctx, AV_LOG_ERROR,
		214	"Drop frame time code only allowed with 1001/30000 fps\n");
		215	return -1;
		216	}
		217
		218	if (s->tc_opt_str) {
		219	AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
		220	int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
		221	if (ret < 0)
		222	return ret;
		223	s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
		224	s->avctx->timecode_frame_start = s->tc.start;
		225	} else {
		226	s->avctx->timecode_frame_start = 0; // default is -1
		227	}
		228	return 0;
		229	}
		230
		231	static void put_header(MpegEncContext *s, int header)
		232	{
		233	avpriv_align_put_bits(&s->pb);
		234	put_bits(&s->pb, 16, header >> 16);
		235	put_sbits(&s->pb, 16, header);
		236	}
		237
		238	/* put sequence header if needed */
		239	static void mpeg1_encode_sequence_header(MpegEncContext *s)
		240	{
		241	unsigned int vbv_buffer_size, fps, v;
		242	int i, constraint_parameter_flag;
		243	uint64_t time_code;
		244	int64_t best_aspect_error = INT64_MAX;
		245	AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
		246
		247	if (aspect_ratio.num == 0 \|\| aspect_ratio.den == 0)
		248	aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
		249
		250	if (s->current_picture.f->key_frame) {
		251	AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
		252
		253	/* mpeg1 header repeated every gop */
		254	put_header(s, SEQ_START_CODE);
		255
		256	put_sbits(&s->pb, 12, s->width & 0xFFF);
		257	put_sbits(&s->pb, 12, s->height & 0xFFF);
		258
		259	for (i = 1; i < 15; i++) {
		260	int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
		261	if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO \|\| i <= 1)
		262	error -= (1LL<<32) / ff_mpeg1_aspect[i];
		263	else
		264	error -= (1LL<<32)ff_mpeg2_aspect[i].num s->height / s->width / ff_mpeg2_aspect[i].den;
		265
		266	error = FFABS(error);
		267
		268	if (error - 2 <= best_aspect_error) {
		269	best_aspect_error = error;
		270	s->aspect_ratio_info = i;
		271	}
		272	}
		273
		274	put_bits(&s->pb, 4, s->aspect_ratio_info);
		275	put_bits(&s->pb, 4, s->frame_rate_index);
		276
		277	if (s->avctx->rc_max_rate) {
		278	v = (s->avctx->rc_max_rate + 399) / 400;
		279	if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
		280	v = 0x3ffff;
		281	} else {
		282	v = 0x3FFFF;
		283	}
		284
		285	if (s->avctx->rc_buffer_size)
		286	vbv_buffer_size = s->avctx->rc_buffer_size;
		287	else
		288	/* VBV calculation: Scaled so that a VCD has the proper
		289	* VBV size of 40 kilobytes */
		290	vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
		291	vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
		292
		293	put_sbits(&s->pb, 18, v);
		294	put_bits(&s->pb, 1, 1); // marker
		295	put_sbits(&s->pb, 10, vbv_buffer_size);
		296
		297	constraint_parameter_flag =
		298	s->width <= 768 &&
		299	s->height <= 576 &&
		300	s->mb_width * s->mb_height <= 396 &&
		301	s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
		302	framerate.num <= framerate.den * 30 &&
		303	s->avctx->me_range &&
		304	s->avctx->me_range < 128 &&
		305	vbv_buffer_size <= 20 &&
		306	v <= 1856000 / 400 &&
		307	s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
		308
		309	put_bits(&s->pb, 1, constraint_parameter_flag);
		310
		311	ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
		312	ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
		313
		314	if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
		315	AVFrameSideData *side_data;
		316	int width = s->width;
		317	int height = s->height;
		318	int use_seq_disp_ext;
		319
		320	put_header(s, EXT_START_CODE);
		321	put_bits(&s->pb, 4, 1); // seq ext
		322
		323	put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
		324
		325	put_bits(&s->pb, 3, s->avctx->profile); // profile
		326	put_bits(&s->pb, 4, s->avctx->level); // level
		327
		328	put_bits(&s->pb, 1, s->progressive_sequence);
		329	put_bits(&s->pb, 2, s->chroma_format);
		330	put_bits(&s->pb, 2, s->width >> 12);
		331	put_bits(&s->pb, 2, s->height >> 12);
		332	put_bits(&s->pb, 12, v >> 18); // bitrate ext
		333	put_bits(&s->pb, 1, 1); // marker
		334	put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
		335	put_bits(&s->pb, 1, s->low_delay);
		336	put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
		337	put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
		338
		339	side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
		340	if (side_data) {
		341	AVPanScan pan_scan = (AVPanScan )side_data->data;
		342	if (pan_scan->width && pan_scan->height) {
		343	width = pan_scan->width >> 4;
		344	height = pan_scan->height >> 4;
		345	}
		346	}
		347
		348	use_seq_disp_ext = (width != s->width \|\|
		349	height != s->height \|\|
		350	s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED \|\|
		351	s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED \|\|
		352	s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED);
		353
		354	if (s->seq_disp_ext == 1 \|\| (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
		355	put_header(s, EXT_START_CODE);
		356	put_bits(&s->pb, 4, 2); // sequence display extension
		357	put_bits(&s->pb, 3, 0); // video_format: 0 is components
		358	put_bits(&s->pb, 1, 1); // colour_description
		359	put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
		360	put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
		361	put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
		362	put_bits(&s->pb, 14, width); // display_horizontal_size
		363	put_bits(&s->pb, 1, 1); // marker_bit
		364	put_bits(&s->pb, 14, height); // display_vertical_size
		365	put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
		366	}
		367	}
		368
		369	put_header(s, GOP_START_CODE);
		370	put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
		371	/* time code: we must convert from the real frame rate to a
		372	* fake MPEG frame rate in case of low frame rate */
		373	fps = (framerate.num + framerate.den / 2) / framerate.den;
		374	time_code = s->current_picture_ptr->f->coded_picture_number +
		375	s->avctx->timecode_frame_start;
		376
		377	s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
		378
		379	av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
		380	if (s->drop_frame_timecode)
		381	time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
		382
		383	put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
		384	put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
		385	put_bits(&s->pb, 1, 1);
		386	put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
		387	put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
		388	put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) \|\| s->intra_only \|\| !s->gop_picture_number);
		389	put_bits(&s->pb, 1, 0); // broken link
		390	}
		391	}
		392
		393	static inline void encode_mb_skip_run(MpegEncContext *s, int run)
		394	{
		395	while (run >= 33) {
		396	put_bits(&s->pb, 11, 0x008);
		397	run -= 33;
		398	}
		399	put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
		400	ff_mpeg12_mbAddrIncrTable[run][0]);
		401	}
		402
		403	static av_always_inline void put_qscale(MpegEncContext *s)
		404	{
		405	if (s->q_scale_type) {
		406	int qp = inv_non_linear_qscale[s->qscale];
		407	av_assert2(s->qscale >= 1 && qp > 0);
		408	put_bits(&s->pb, 5, qp);
		409	} else {
		410	put_bits(&s->pb, 5, s->qscale);
		411	}
		412	}
		413
		414	void ff_mpeg1_encode_slice_header(MpegEncContext *s)
		415	{
		416	if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
		417	put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
		418	/* slice_vertical_position_extension */
		419	put_bits(&s->pb, 3, s->mb_y >> 7);
		420	} else {
		421	put_header(s, SLICE_MIN_START_CODE + s->mb_y);
		422	}
		423	put_qscale(s);
		424	/* slice extra information */
		425	put_bits(&s->pb, 1, 0);
		426	}
		427
		428	void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
		429	{
		430	AVFrameSideData *side_data;
		431	mpeg1_encode_sequence_header(s);
		432
		433	/* mpeg1 picture header */
		434	put_header(s, PICTURE_START_CODE);
		435	/* temporal reference */
		436
		437	// RAL: s->picture_number instead of s->fake_picture_number
		438	put_bits(&s->pb, 10,
		439	(s->picture_number - s->gop_picture_number) & 0x3ff);
		440	put_bits(&s->pb, 3, s->pict_type);
		441
		442	s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
		443	put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
		444
		445	// RAL: Forward f_code also needed for B-frames
		446	if (s->pict_type == AV_PICTURE_TYPE_P \|\|
		447	s->pict_type == AV_PICTURE_TYPE_B) {
		448	put_bits(&s->pb, 1, 0); /* half pel coordinates */
		449	if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
		450	put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
		451	else
		452	put_bits(&s->pb, 3, 7); /* forward_f_code */
		453	}
		454
		455	// RAL: Backward f_code necessary for B-frames
		456	if (s->pict_type == AV_PICTURE_TYPE_B) {
		457	put_bits(&s->pb, 1, 0); /* half pel coordinates */
		458	if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
		459	put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
		460	else
		461	put_bits(&s->pb, 3, 7); /* backward_f_code */
		462	}
		463
		464	put_bits(&s->pb, 1, 0); /* extra bit picture */
		465
		466	s->frame_pred_frame_dct = 1;
		467	if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
		468	put_header(s, EXT_START_CODE);
		469	put_bits(&s->pb, 4, 8); /* pic ext */
		470	if (s->pict_type == AV_PICTURE_TYPE_P \|\|
		471	s->pict_type == AV_PICTURE_TYPE_B) {
		472	put_bits(&s->pb, 4, s->f_code);
		473	put_bits(&s->pb, 4, s->f_code);
		474	} else {
		475	put_bits(&s->pb, 8, 255);
		476	}
		477	if (s->pict_type == AV_PICTURE_TYPE_B) {
		478	put_bits(&s->pb, 4, s->b_code);
		479	put_bits(&s->pb, 4, s->b_code);
		480	} else {
		481	put_bits(&s->pb, 8, 255);
		482	}
		483	put_bits(&s->pb, 2, s->intra_dc_precision);
		484
		485	av_assert0(s->picture_structure == PICT_FRAME);
		486	put_bits(&s->pb, 2, s->picture_structure);
		487	if (s->progressive_sequence)
		488	put_bits(&s->pb, 1, 0); /* no repeat */
		489	else
		490	put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first);
		491	/* XXX: optimize the generation of this flag with entropy measures */
		492	s->frame_pred_frame_dct = s->progressive_sequence;
		493
		494	put_bits(&s->pb, 1, s->frame_pred_frame_dct);
		495	put_bits(&s->pb, 1, s->concealment_motion_vectors);
		496	put_bits(&s->pb, 1, s->q_scale_type);
		497	put_bits(&s->pb, 1, s->intra_vlc_format);
		498	put_bits(&s->pb, 1, s->alternate_scan);
		499	put_bits(&s->pb, 1, s->repeat_first_field);
		500	s->progressive_frame = s->progressive_sequence;
		501	/* chroma_420_type */
		502	put_bits(&s->pb, 1, s->chroma_format ==
		503	CHROMA_420 ? s->progressive_frame : 0);
		504	put_bits(&s->pb, 1, s->progressive_frame);
		505	put_bits(&s->pb, 1, 0); /* composite_display_flag */
		506	}
		507	if (s->scan_offset) {
		508	int i;
		509
		510	put_header(s, USER_START_CODE);
		511	for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
		512	put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
		513	}
		514	side_data = av_frame_get_side_data(s->current_picture_ptr->f,
		515	AV_FRAME_DATA_STEREO3D);
		516	if (side_data) {
		517	AVStereo3D stereo = (AVStereo3D )side_data->data;
		518	uint8_t fpa_type;
		519
		520	switch (stereo->type) {
		521	case AV_STEREO3D_SIDEBYSIDE:
		522	fpa_type = 0x03;
		523	break;
		524	case AV_STEREO3D_TOPBOTTOM:
		525	fpa_type = 0x04;
		526	break;
		527	case AV_STEREO3D_2D:
		528	fpa_type = 0x08;
		529	break;
		530	case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
		531	fpa_type = 0x23;
		532	break;
		533	default:
		534	fpa_type = 0;
		535	break;
		536	}
		537
		538	if (fpa_type != 0) {
		539	put_header(s, USER_START_CODE);
		540	put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
		541	put_bits(&s->pb, 8, 'P');
		542	put_bits(&s->pb, 8, '3');
		543	put_bits(&s->pb, 8, 'D');
		544	put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
		545
		546	put_bits(&s->pb, 1, 1); // reserved_bit
		547	put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
		548	put_bits(&s->pb, 8, 0x04); // reserved_data[0]
		549	put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
		550	}
		551	}
		552
		553	s->mb_y = 0;
		554	ff_mpeg1_encode_slice_header(s);
		555	}
		556
		557	static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
		558	int has_mv, int field_motion)
		559	{
		560	put_bits(&s->pb, n, bits);
		561	if (!s->frame_pred_frame_dct) {
		562	if (has_mv)
		563	/* motion_type: frame/field */
		564	put_bits(&s->pb, 2, 2 - field_motion);
		565	put_bits(&s->pb, 1, s->interlaced_dct);
		566	}
		567	}
		568
		569	// RAL: Parameter added: f_or_b_code
		570	static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
		571	{
		572	if (val == 0) {
		573	/* zero vector */
		574	put_bits(&s->pb,
		575	ff_mpeg12_mbMotionVectorTable[0][1],
		576	ff_mpeg12_mbMotionVectorTable[0][0]);
		577	} else {
		578	int code, sign, bits;
		579	int bit_size = f_or_b_code - 1;
		580	int range = 1 << bit_size;
		581	/* modulo encoding */
		582	val = sign_extend(val, 5 + bit_size);
		583
		584	if (val >= 0) {
		585	val--;
		586	code = (val >> bit_size) + 1;
		587	bits = val & (range - 1);
		588	sign = 0;
		589	} else {
		590	val = -val;
		591	val--;
		592	code = (val >> bit_size) + 1;
		593	bits = val & (range - 1);
		594	sign = 1;
		595	}
		596
		597	av_assert2(code > 0 && code <= 16);
		598
		599	put_bits(&s->pb,
		600	ff_mpeg12_mbMotionVectorTable[code][1],
		601	ff_mpeg12_mbMotionVectorTable[code][0]);
		602
		603	put_bits(&s->pb, 1, sign);
		604	if (bit_size > 0)
		605	put_bits(&s->pb, bit_size, bits);
		606	}
		607	}
		608
		609	static inline void encode_dc(MpegEncContext *s, int diff, int component)
		610	{
		611	unsigned int diff_u = diff + 255;
		612	if (diff_u >= 511) {
		613	int index;
		614
		615	if (diff < 0) {
		616	index = av_log2_16bit(-2 * diff);
		617	diff--;
		618	} else {
		619	index = av_log2_16bit(2 * diff);
		620	}
		621	if (component == 0)
		622	put_bits(&s->pb,
		623	ff_mpeg12_vlc_dc_lum_bits[index] + index,
		624	(ff_mpeg12_vlc_dc_lum_code[index] << index) +
		625	av_mod_uintp2(diff, index));
		626	else
		627	put_bits(&s->pb,
		628	ff_mpeg12_vlc_dc_chroma_bits[index] + index,
		629	(ff_mpeg12_vlc_dc_chroma_code[index] << index) +
		630	av_mod_uintp2(diff, index));
		631	} else {
		632	if (component == 0)
		633	put_bits(&s->pb,
		634	mpeg1_lum_dc_uni[diff + 255] & 0xFF,
		635	mpeg1_lum_dc_uni[diff + 255] >> 8);
		636	else
		637	put_bits(&s->pb,
		638	mpeg1_chr_dc_uni[diff + 255] & 0xFF,
		639	mpeg1_chr_dc_uni[diff + 255] >> 8);
		640	}
		641	}
		642
		643	static void mpeg1_encode_block(MpegEncContext s, int16_t block, int n)
		644	{
		645	int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
		646	int code, component;
		647	const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
		648
		649	last_index = s->block_last_index[n];
		650
		651	/* DC coef */
		652	if (s->mb_intra) {
		653	component = (n <= 3 ? 0 : (n & 1) + 1);
		654	dc = block[0]; /* overflow is impossible */
		655	diff = dc - s->last_dc[component];
		656	encode_dc(s, diff, component);
		657	s->last_dc[component] = dc;
		658	i = 1;
		659	if (s->intra_vlc_format)
		660	table_vlc = ff_rl_mpeg2.table_vlc;
		661	} else {
		662	/* encode the first coefficient: needs to be done here because
		663	* it is handled slightly differently */
		664	level = block[0];
		665	if (abs(level) == 1) {
		666	code = ((uint32_t)level >> 31); /* the sign bit */
		667	put_bits(&s->pb, 2, code \| 0x02);
		668	i = 1;
		669	} else {
		670	i = 0;
		671	last_non_zero = -1;
		672	goto next_coef;
		673	}
		674	}
		675
		676	/* now quantify & encode AC coefs */
		677	last_non_zero = i - 1;
		678
		679	for (; i <= last_index; i++) {
		680	j = s->intra_scantable.permutated[i];
		681	level = block[j];
		682
		683	next_coef:
		684	/* encode using VLC */
		685	if (level != 0) {
		686	run = i - last_non_zero - 1;
		687
		688	alevel = level;
		689	MASK_ABS(sign, alevel);
		690	sign &= 1;
		691
		692	if (alevel <= mpeg1_max_level[0][run]) {
		693	code = mpeg1_index_run[0][run] + alevel - 1;
		694	/* store the VLC & sign at once */
		695	put_bits(&s->pb, table_vlc[code][1] + 1,
		696	(table_vlc[code][0] << 1) + sign);
		697	} else {
		698	/* escape seems to be pretty rare <5% so I do not optimize it */
		699	put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
		700	/* escape: only clip in this case */
		701	put_bits(&s->pb, 6, run);
		702	if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
		703	if (alevel < 128) {
		704	put_sbits(&s->pb, 8, level);
		705	} else {
		706	if (level < 0)
		707	put_bits(&s->pb, 16, 0x8001 + level + 255);
		708	else
		709	put_sbits(&s->pb, 16, level);
		710	}
		711	} else {
		712	put_sbits(&s->pb, 12, level);
		713	}
		714	}
		715	last_non_zero = i;
		716	}
		717	}
		718	/* end of block */
		719	put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
		720	}
		721
		722	static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
		723	int16_t block[8][64],
		724	int motion_x, int motion_y,
		725	int mb_block_count)
		726	{
		727	int i, cbp;
		728	const int mb_x = s->mb_x;
		729	const int mb_y = s->mb_y;
		730	const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
		731
		732	/* compute cbp */
		733	cbp = 0;
		734	for (i = 0; i < mb_block_count; i++)
		735	if (s->block_last_index[i] >= 0)
		736	cbp \|= 1 << (mb_block_count - 1 - i);
		737
		738	if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
		739	(mb_x != s->mb_width - 1 \|\|
		740	(mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
		741	((s->pict_type == AV_PICTURE_TYPE_P && (motion_x \| motion_y) == 0) \|\|
		742	(s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
		743	(((s->mv_dir & MV_DIR_FORWARD)
		744	? ((s->mv[0][0][0] - s->last_mv[0][0][0]) \|
		745	(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) \|
		746	((s->mv_dir & MV_DIR_BACKWARD)
		747	? ((s->mv[1][0][0] - s->last_mv[1][0][0]) \|
		748	(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
		749	s->mb_skip_run++;
		750	s->qscale -= s->dquant;
		751	s->skip_count++;
		752	s->misc_bits++;
		753	s->last_bits++;
		754	if (s->pict_type == AV_PICTURE_TYPE_P) {
		755	s->last_mv[0][0][0] =
		756	s->last_mv[0][0][1] =
		757	s->last_mv[0][1][0] =
		758	s->last_mv[0][1][1] = 0;
		759	}
		760	} else {
		761	if (first_mb) {
		762	av_assert0(s->mb_skip_run == 0);
		763	encode_mb_skip_run(s, s->mb_x);
		764	} else {
		765	encode_mb_skip_run(s, s->mb_skip_run);
		766	}
		767
		768	if (s->pict_type == AV_PICTURE_TYPE_I) {
		769	if (s->dquant && cbp) {
		770	/* macroblock_type: macroblock_quant = 1 */
		771	put_mb_modes(s, 2, 1, 0, 0);
		772	put_qscale(s);
		773	} else {
		774	/* macroblock_type: macroblock_quant = 0 */
		775	put_mb_modes(s, 1, 1, 0, 0);
		776	s->qscale -= s->dquant;
		777	}
		778	s->misc_bits += get_bits_diff(s);
		779	s->i_count++;
		780	} else if (s->mb_intra) {
		781	if (s->dquant && cbp) {
		782	put_mb_modes(s, 6, 0x01, 0, 0);
		783	put_qscale(s);
		784	} else {
		785	put_mb_modes(s, 5, 0x03, 0, 0);
		786	s->qscale -= s->dquant;
		787	}
		788	s->misc_bits += get_bits_diff(s);
		789	s->i_count++;
		790	memset(s->last_mv, 0, sizeof(s->last_mv));
		791	} else if (s->pict_type == AV_PICTURE_TYPE_P) {
		792	if (s->mv_type == MV_TYPE_16X16) {
		793	if (cbp != 0) {
		794	if ((motion_x \| motion_y) == 0) {
		795	if (s->dquant) {
		796	/* macroblock_pattern & quant */
		797	put_mb_modes(s, 5, 1, 0, 0);
		798	put_qscale(s);
		799	} else {
		800	/* macroblock_pattern only */
		801	put_mb_modes(s, 2, 1, 0, 0);
		802	}
		803	s->misc_bits += get_bits_diff(s);
		804	} else {
		805	if (s->dquant) {
		806	put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
		807	put_qscale(s);
		808	} else {
		809	put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
		810	}
		811	s->misc_bits += get_bits_diff(s);
		812	// RAL: f_code parameter added
		813	mpeg1_encode_motion(s,
		814	motion_x - s->last_mv[0][0][0],
		815	s->f_code);
		816	// RAL: f_code parameter added
		817	mpeg1_encode_motion(s,
		818	motion_y - s->last_mv[0][0][1],
		819	s->f_code);
		820	s->mv_bits += get_bits_diff(s);
		821	}
		822	} else {
		823	put_bits(&s->pb, 3, 1); /* motion only */
		824	if (!s->frame_pred_frame_dct)
		825	put_bits(&s->pb, 2, 2); /* motion_type: frame */
		826	s->misc_bits += get_bits_diff(s);
		827	// RAL: f_code parameter added
		828	mpeg1_encode_motion(s,
		829	motion_x - s->last_mv[0][0][0],
		830	s->f_code);
		831	// RAL: f_code parameter added
		832	mpeg1_encode_motion(s,
		833	motion_y - s->last_mv[0][0][1],
		834	s->f_code);
		835	s->qscale -= s->dquant;
		836	s->mv_bits += get_bits_diff(s);
		837	}
		838	s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
		839	s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
		840	} else {
		841	av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
		842
		843	if (cbp) {
		844	if (s->dquant) {
		845	put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
		846	put_qscale(s);
		847	} else {
		848	put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
		849	}
		850	} else {
		851	put_bits(&s->pb, 3, 1); /* motion only */
		852	put_bits(&s->pb, 2, 1); /* motion_type: field */
		853	s->qscale -= s->dquant;
		854	}
		855	s->misc_bits += get_bits_diff(s);
		856	for (i = 0; i < 2; i++) {
		857	put_bits(&s->pb, 1, s->field_select[0][i]);
		858	mpeg1_encode_motion(s,
		859	s->mv[0][i][0] - s->last_mv[0][i][0],
		860	s->f_code);
		861	mpeg1_encode_motion(s,
		862	s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
		863	s->f_code);
		864	s->last_mv[0][i][0] = s->mv[0][i][0];
		865	s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
		866	}
		867	s->mv_bits += get_bits_diff(s);
		868	}
		869	if (cbp) {
		870	if (s->chroma_y_shift) {
		871	put_bits(&s->pb,
		872	ff_mpeg12_mbPatTable[cbp][1],
		873	ff_mpeg12_mbPatTable[cbp][0]);
		874	} else {
		875	put_bits(&s->pb,
		876	ff_mpeg12_mbPatTable[cbp >> 2][1],
		877	ff_mpeg12_mbPatTable[cbp >> 2][0]);
		878	put_sbits(&s->pb, 2, cbp);
		879	}
		880	}
		881	s->f_count++;
		882	} else {
		883	if (s->mv_type == MV_TYPE_16X16) {
		884	if (cbp) { // With coded bloc pattern
		885	if (s->dquant) {
		886	if (s->mv_dir == MV_DIR_FORWARD)
		887	put_mb_modes(s, 6, 3, 1, 0);
		888	else
		889	put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
		890	put_qscale(s);
		891	} else {
		892	put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
		893	}
		894	} else { // No coded bloc pattern
		895	put_bits(&s->pb, 5 - s->mv_dir, 2);
		896	if (!s->frame_pred_frame_dct)
		897	put_bits(&s->pb, 2, 2); /* motion_type: frame */
		898	s->qscale -= s->dquant;
		899	}
		900	s->misc_bits += get_bits_diff(s);
		901	if (s->mv_dir & MV_DIR_FORWARD) {
		902	mpeg1_encode_motion(s,
		903	s->mv[0][0][0] - s->last_mv[0][0][0],
		904	s->f_code);
		905	mpeg1_encode_motion(s,
		906	s->mv[0][0][1] - s->last_mv[0][0][1],
		907	s->f_code);
		908	s->last_mv[0][0][0] =
		909	s->last_mv[0][1][0] = s->mv[0][0][0];
		910	s->last_mv[0][0][1] =
		911	s->last_mv[0][1][1] = s->mv[0][0][1];
		912	s->f_count++;
		913	}
		914	if (s->mv_dir & MV_DIR_BACKWARD) {
		915	mpeg1_encode_motion(s,
		916	s->mv[1][0][0] - s->last_mv[1][0][0],
		917	s->b_code);
		918	mpeg1_encode_motion(s,
		919	s->mv[1][0][1] - s->last_mv[1][0][1],
		920	s->b_code);
		921	s->last_mv[1][0][0] =
		922	s->last_mv[1][1][0] = s->mv[1][0][0];
		923	s->last_mv[1][0][1] =
		924	s->last_mv[1][1][1] = s->mv[1][0][1];
		925	s->b_count++;
		926	}
		927	} else {
		928	av_assert2(s->mv_type == MV_TYPE_FIELD);
		929	av_assert2(!s->frame_pred_frame_dct);
		930	if (cbp) { // With coded bloc pattern
		931	if (s->dquant) {
		932	if (s->mv_dir == MV_DIR_FORWARD)
		933	put_mb_modes(s, 6, 3, 1, 1);
		934	else
		935	put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
		936	put_qscale(s);
		937	} else {
		938	put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
		939	}
		940	} else { // No coded bloc pattern
		941	put_bits(&s->pb, 5 - s->mv_dir, 2);
		942	put_bits(&s->pb, 2, 1); /* motion_type: field */
		943	s->qscale -= s->dquant;
		944	}
		945	s->misc_bits += get_bits_diff(s);
		946	if (s->mv_dir & MV_DIR_FORWARD) {
		947	for (i = 0; i < 2; i++) {
		948	put_bits(&s->pb, 1, s->field_select[0][i]);
		949	mpeg1_encode_motion(s,
		950	s->mv[0][i][0] - s->last_mv[0][i][0],
		951	s->f_code);
		952	mpeg1_encode_motion(s,
		953	s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
		954	s->f_code);
		955	s->last_mv[0][i][0] = s->mv[0][i][0];
		956	s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
		957	}
		958	s->f_count++;
		959	}
		960	if (s->mv_dir & MV_DIR_BACKWARD) {
		961	for (i = 0; i < 2; i++) {
		962	put_bits(&s->pb, 1, s->field_select[1][i]);
		963	mpeg1_encode_motion(s,
		964	s->mv[1][i][0] - s->last_mv[1][i][0],
		965	s->b_code);
		966	mpeg1_encode_motion(s,
		967	s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
		968	s->b_code);
		969	s->last_mv[1][i][0] = s->mv[1][i][0];
		970	s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
		971	}
		972	s->b_count++;
		973	}
		974	}
		975	s->mv_bits += get_bits_diff(s);
		976	if (cbp) {
		977	if (s->chroma_y_shift) {
		978	put_bits(&s->pb,
		979	ff_mpeg12_mbPatTable[cbp][1],
		980	ff_mpeg12_mbPatTable[cbp][0]);
		981	} else {
		982	put_bits(&s->pb,
		983	ff_mpeg12_mbPatTable[cbp >> 2][1],
		984	ff_mpeg12_mbPatTable[cbp >> 2][0]);
		985	put_sbits(&s->pb, 2, cbp);
		986	}
		987	}
		988	}
		989	for (i = 0; i < mb_block_count; i++)
		990	if (cbp & (1 << (mb_block_count - 1 - i)))
		991	mpeg1_encode_block(s, block[i], i);
		992	s->mb_skip_run = 0;
		993	if (s->mb_intra)
		994	s->i_tex_bits += get_bits_diff(s);
		995	else
		996	s->p_tex_bits += get_bits_diff(s);
		997	}
		998	}
		999
		1000	void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
		1001	int motion_x, int motion_y)
		1002	{
		1003	if (s->chroma_format == CHROMA_420)
		1004	mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
		1005	else
		1006	mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
		1007	}
		1008
		1009	av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
		1010	{
		1011	static int done = 0;
		1012
		1013	ff_mpeg12_common_init(s);
		1014
		1015	if (!done) {
		1016	int f_code;
		1017	int mv;
		1018	int i;
		1019
		1020	done = 1;
		1021	ff_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
		1022	ff_rl_init(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
		1023
		1024	for (i = 0; i < 64; i++) {
		1025	mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
		1026	mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
		1027	}
		1028
		1029	init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
		1030	if (s->intra_vlc_format)
		1031	init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
		1032
		1033	/* build unified dc encoding tables */
		1034	for (i = -255; i < 256; i++) {
		1035	int adiff, index;
		1036	int bits, code;
		1037	int diff = i;
		1038
		1039	adiff = FFABS(diff);
		1040	if (diff < 0)
		1041	diff--;
		1042	index = av_log2(2 * adiff);
		1043
		1044	bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
		1045	code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
		1046	av_mod_uintp2(diff, index);
		1047	mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
		1048
		1049	bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
		1050	code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
		1051	av_mod_uintp2(diff, index);
		1052	mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
		1053	}
		1054
		1055	for (f_code = 1; f_code <= MAX_FCODE; f_code++)
		1056	for (mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
		1057	int len;
		1058
		1059	if (mv == 0) {
		1060	len = ff_mpeg12_mbMotionVectorTable[0][1];
		1061	} else {
		1062	int val, bit_size, code;
		1063
		1064	bit_size = f_code - 1;
		1065
		1066	val = mv;
		1067	if (val < 0)
		1068	val = -val;
		1069	val--;
		1070	code = (val >> bit_size) + 1;
		1071	if (code < 17)
		1072	len = ff_mpeg12_mbMotionVectorTable[code][1] +
		1073	1 + bit_size;
		1074	else
		1075	len = ff_mpeg12_mbMotionVectorTable[16][1] +
		1076	2 + bit_size;
		1077	}
		1078
		1079	mv_penalty[f_code][mv + MAX_DMV] = len;
		1080	}
		1081
		1082
		1083	for (f_code = MAX_FCODE; f_code > 0; f_code--)
		1084	for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
		1085	fcode_tab[mv + MAX_MV] = f_code;
		1086	}
		1087	s->me.mv_penalty = mv_penalty;
		1088	s->fcode_tab = fcode_tab;
		1089	if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
		1090	s->min_qcoeff = -255;
		1091	s->max_qcoeff = 255;
		1092	} else {
		1093	s->min_qcoeff = -2047;
		1094	s->max_qcoeff = 2047;
		1095	}
		1096	if (s->intra_vlc_format) {
		1097	s->intra_ac_vlc_length =
		1098	s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
		1099	} else {
		1100	s->intra_ac_vlc_length =
		1101	s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
		1102	}
		1103	s->inter_ac_vlc_length =
		1104	s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
		1105	}
		1106
		1107	#define OFFSET(x) offsetof(MpegEncContext, x)
		1108	#define VE AV_OPT_FLAG_ENCODING_PARAM \| AV_OPT_FLAG_VIDEO_PARAM
		1109	#define COMMON_OPTS \
		1110	{ "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", \
		1111	OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
		1112	{ "intra_vlc", "Use MPEG-2 intra VLC table.", \
		1113	OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
		1114	{ "drop_frame_timecode", "Timecode is in drop frame format.", \
		1115	OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
		1116	{ "scan_offset", "Reserve space for SVCD scan offset user data.", \
		1117	OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
		1118
		1119	static const AVOption mpeg1_options[] = {
		1120	COMMON_OPTS
		1121	FF_MPV_COMMON_OPTS
		1122	{ NULL },
		1123	};
		1124
		1125	static const AVOption mpeg2_options[] = {
		1126	COMMON_OPTS
		1127	{ "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
		1128	{ "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
		1129	{ "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
		1130	{ "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
		1131	{ "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
		1132	{ "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
		1133	FF_MPV_COMMON_OPTS
		1134	{ NULL },
		1135	};
		1136
		1137	#define mpeg12_class(x) \
		1138	static const AVClass mpeg ## x ## _class = { \
		1139	.class_name = "mpeg" # x "video encoder", \
		1140	.item_name = av_default_item_name, \
		1141	.option = mpeg ## x ## _options, \
		1142	.version = LIBAVUTIL_VERSION_INT, \
		1143	};
		1144
		1145	mpeg12_class(1)
		1146	mpeg12_class(2)
		1147
		1148	AVCodec ff_mpeg1video_encoder = {
		1149	.name = "mpeg1video",
		1150	.long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
		1151	.type = AVMEDIA_TYPE_VIDEO,
		1152	.id = AV_CODEC_ID_MPEG1VIDEO,
		1153	.priv_data_size = sizeof(MpegEncContext),
		1154	.init = encode_init,
		1155	.encode2 = ff_mpv_encode_picture,
		1156	.close = ff_mpv_encode_end,
		1157	.supported_framerates = ff_mpeg12_frame_rate_tab + 1,
		1158	.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
		1159	AV_PIX_FMT_NONE },
		1160	.capabilities = AV_CODEC_CAP_DELAY \| AV_CODEC_CAP_SLICE_THREADS,
		1161	.priv_class = &mpeg1_class,
		1162	};
		1163
		1164	AVCodec ff_mpeg2video_encoder = {
		1165	.name = "mpeg2video",
		1166	.long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
		1167	.type = AVMEDIA_TYPE_VIDEO,
		1168	.id = AV_CODEC_ID_MPEG2VIDEO,
		1169	.priv_data_size = sizeof(MpegEncContext),
		1170	.init = encode_init,
		1171	.encode2 = ff_mpv_encode_picture,
		1172	.close = ff_mpv_encode_end,
		1173	.supported_framerates = ff_mpeg2_frame_rate_tab,
		1174	.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
		1175	AV_PIX_FMT_YUV422P,
		1176	AV_PIX_FMT_NONE },
		1177	.capabilities = AV_CODEC_CAP_DELAY \| AV_CODEC_CAP_SLICE_THREADS,
		1178	.priv_class = &mpeg2_class,
		1179	};

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(root)/contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavcodec/mpeg12enc.c – Rev 6147