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FFmpeg/libavcodec/mpeg12enc.c
Andreas Rheinhardt 4243da4ff4 avcodec/codec_internal: Use union for FFCodec decode/encode callbacks 
This is possible, because every given FFCodec has to implement
exactly one of these. Doing so decreases sizeof(FFCodec) and
therefore decreases the size of the binary.
Notice that in case of position-independent code the decrease
is in .data.rel.ro, so that this translates to decreased
memory consumption.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-04-05 20:02:37 +02:00

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/*
* MPEG-1/2 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
* MPEG-1/2 encoder
*/
#include <stdint.h>
#include "config.h"
#include "config_components.h"
#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/thread.h"
#include "libavutil/timecode.h"
#include "libavutil/stereo3d.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "mathops.h"
#include "mpeg12.h"
#include "mpeg12data.h"
#include "mpeg12enc.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "mpegvideoenc.h"
#include "profiles.h"
#if CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER
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_DMV * 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];
typedef struct MPEG12EncContext {
MpegEncContext mpeg;
AVRational frame_rate_ext;
unsigned frame_rate_index;
int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num
int64_t timecode_frame_start; ///< GOP timecode frame start number, in non drop frame format
AVTimecode tc; ///< timecode context
char *tc_opt_str; ///< timecode option string
int drop_frame_timecode; ///< timecode is in drop frame format.
int scan_offset; ///< reserve space for SVCD scan offset user data.
int a53_cc;
int seq_disp_ext;
int video_format;
} MPEG12EncContext;
#define A53_MAX_CC_COUNT 0x1f
#endif /* CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER */
av_cold void ff_mpeg1_init_uni_ac_vlc(const 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;
}
}
}
#if CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER
static int find_frame_rate_index(MPEG12EncContext *mpeg12)
{
MpegEncContext *const s = &mpeg12->mpeg;
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;
mpeg12->frame_rate_index = i;
mpeg12->frame_rate_ext.num = ext.num;
mpeg12->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)
{
MPEG12EncContext *const mpeg12 = avctx->priv_data;
MpegEncContext *const s = &mpeg12->mpeg;
int ret;
int max_size = avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO ? 16383 : 4095;
if (avctx->width > max_size || avctx->height > max_size) {
av_log(avctx, AV_LOG_ERROR, "%s does not support resolutions above %dx%d\n",
CONFIG_SMALL ? avctx->codec->name : avctx->codec->long_name,
max_size, max_size);
return AVERROR(EINVAL);
}
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 (avctx->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 multiples of 4096\n"
"add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
return AVERROR(EINVAL);
}
}
if (avctx->profile == FF_PROFILE_UNKNOWN) {
if (avctx->level != FF_LEVEL_UNKNOWN) {
av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
return AVERROR(EINVAL);
}
/* Main or 4:2:2 */
avctx->profile = avctx->pix_fmt == AV_PIX_FMT_YUV420P ? FF_PROFILE_MPEG2_MAIN
: FF_PROFILE_MPEG2_422;
}
if (avctx->level == FF_LEVEL_UNKNOWN) {
if (avctx->profile == FF_PROFILE_MPEG2_422) { /* 4:2:2 */
if (avctx->width <= 720 && avctx->height <= 608)
avctx->level = 5; /* Main */
else
avctx->level = 2; /* High */
} else {
if (avctx->profile != FF_PROFILE_MPEG2_HIGH &&
avctx->pix_fmt != AV_PIX_FMT_YUV420P) {
av_log(avctx, AV_LOG_ERROR,
"Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
return AVERROR(EINVAL);
}
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 ((ret = ff_mpv_encode_init(avctx)) < 0)
return ret;
if (find_frame_rate_index(mpeg12) < 0) {
if (avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
avctx->time_base.den, avctx->time_base.num);
return AVERROR(EINVAL);
} else {
av_log(avctx, AV_LOG_INFO,
"MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
avctx->time_base.den, avctx->time_base.num);
}
}
mpeg12->drop_frame_timecode = mpeg12->drop_frame_timecode || !!(avctx->flags2 & AV_CODEC_FLAG2_DROP_FRAME_TIMECODE);
if (mpeg12->drop_frame_timecode)
mpeg12->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
if (mpeg12->drop_frame_timecode && mpeg12->frame_rate_index != 4) {
av_log(avctx, AV_LOG_ERROR,
"Drop frame time code only allowed with 1001/30000 fps\n");
return AVERROR(EINVAL);
}
if (mpeg12->tc_opt_str) {
AVRational rate = ff_mpeg12_frame_rate_tab[mpeg12->frame_rate_index];
int ret = av_timecode_init_from_string(&mpeg12->tc, rate, mpeg12->tc_opt_str, s);
if (ret < 0)
return ret;
mpeg12->drop_frame_timecode = !!(mpeg12->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
mpeg12->timecode_frame_start = mpeg12->tc.start;
} else {
mpeg12->timecode_frame_start = 0; // default is -1
}
return 0;
}
static void put_header(MpegEncContext *s, int header)
{
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)
{
MPEG12EncContext *const mpeg12 = (MPEG12EncContext*)s;
unsigned int vbv_buffer_size, fps, v;
int constraint_parameter_flag;
AVRational framerate = ff_mpeg12_frame_rate_tab[mpeg12->frame_rate_index];
uint64_t time_code;
int64_t best_aspect_error = INT64_MAX;
AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
int aspect_ratio_info;
if (!s->current_picture.f->key_frame)
return;
if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
/* MPEG-1 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 (int i = 1; i < 15; i++) {
int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
error -= (1LL<<32) / ff_mpeg1_aspect[i];
else
error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
error = FFABS(error);
if (error - 2 <= best_aspect_error) {
best_aspect_error = error;
aspect_ratio_info = i;
}
}
put_bits(&s->pb, 4, aspect_ratio_info);
put_bits(&s->pb, 4, mpeg12->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) {
const AVFrameSideData *side_data;
int width = s->width;
int height = s->height;
int use_seq_disp_ext;
put_header(s, EXT_START_CODE);
put_bits(&s->pb, 4, 1); // seq ext
put_bits(&s->pb, 1, s->avctx->profile == FF_PROFILE_MPEG2_422); // 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, mpeg12->frame_rate_ext.num-1); // frame_rate_ext_n
put_bits(&s->pb, 5, mpeg12->frame_rate_ext.den-1); // frame_rate_ext_d
side_data = av_frame_get_side_data(s->current_picture_ptr->f, AV_FRAME_DATA_PANSCAN);
if (side_data) {
const AVPanScan *pan_scan = (AVPanScan *)side_data->data;
if (pan_scan->width && pan_scan->height) {
width = pan_scan->width >> 4;
height = pan_scan->height >> 4;
}
}
use_seq_disp_ext = (width != s->width ||
height != s->height ||
s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED ||
mpeg12->video_format != VIDEO_FORMAT_UNSPECIFIED);
if (mpeg12->seq_disp_ext == 1 ||
(mpeg12->seq_disp_ext == -1 && use_seq_disp_ext)) {
put_header(s, EXT_START_CODE);
put_bits(&s->pb, 4, 2); // sequence display extension
put_bits(&s->pb, 3, mpeg12->video_format); // video_format
put_bits(&s->pb, 1, 1); // colour_description
put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
put_bits(&s->pb, 14, width); // display_horizontal_size
put_bits(&s->pb, 1, 1); // marker_bit
put_bits(&s->pb, 14, height); // display_vertical_size
put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
}
}
put_header(s, GOP_START_CODE);
put_bits(&s->pb, 1, mpeg12->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 +
mpeg12->timecode_frame_start;
mpeg12->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
av_assert0(mpeg12->drop_frame_timecode == !!(mpeg12->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
if (mpeg12->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->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) ||
s->intra_only || !mpeg12->gop_picture_number);
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)
{
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)
{
MPEG12EncContext *const mpeg12 = (MPEG12EncContext*)s;
AVFrameSideData *side_data;
mpeg1_encode_sequence_header(s);
/* MPEG-1 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 - mpeg12->gop_picture_number) & 0x3ff);
put_bits(&s->pb, 3, s->pict_type);
s->vbv_delay_pos = put_bytes_count(&s->pb, 0);
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 (mpeg12->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]
}
}
if (CONFIG_MPEG2VIDEO_ENCODER && mpeg12->a53_cc) {
side_data = av_frame_get_side_data(s->current_picture_ptr->f,
AV_FRAME_DATA_A53_CC);
if (side_data) {
if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
int i = 0;
put_header (s, USER_START_CODE);
put_bits(&s->pb, 8, 'G'); // user_identifier
put_bits(&s->pb, 8, 'A');
put_bits(&s->pb, 8, '9');
put_bits(&s->pb, 8, '4');
put_bits(&s->pb, 8, 3); // user_data_type_code
put_bits(&s->pb, 8,
(side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
put_bits(&s->pb, 8, 0xff); // em_data
for (i = 0; i < side_data->size; i++)
put_bits(&s->pb, 8, side_data->data[i]);
put_bits(&s->pb, 8, 0xff); // marker_bits
} else {
av_log(s->avctx, AV_LOG_WARNING,
"Closed Caption size (%"SIZE_SPECIFIER") can not exceed "
"93 bytes and must be a multiple of 3\n", side_data->size);
}
}
}
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, corresponds to ff_mpeg12_mbMotionVectorTable[0] */
put_bits(&s->pb, 1, 0x01);
} 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)
{
unsigned int diff_u = diff + 255;
if (diff_u >= 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) +
av_mod_uintp2(diff, index));
else
put_bits(&s->pb,
ff_mpeg12_vlc_dc_chroma_bits[index] + index,
(ff_mpeg12_vlc_dc_chroma_code[index] << index) +
av_mod_uintp2(diff, index));
} 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 <= ff_rl_mpeg1.max_level[0][run]) {
code = ff_rl_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;
* the following value is the common escape value for both
* possible tables (i.e. table_vlc[111]). */
put_bits(&s->pb, 6, 0x01);
/* 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[8][64],
int motion_x, int motion_y,
int mb_block_count,
int chroma_y_shift)
{
/* MPEG-1 is always 420. */
#define IS_MPEG1(s) (chroma_y_shift == 1 && (s)->codec_id == AV_CODEC_ID_MPEG1VIDEO)
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 && IS_MPEG1(s))) &&
((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 (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);
}
}
} 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];
}
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];
}
} 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;
}
}
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->mv_bits += get_bits_diff(s);
if (cbp) {
if (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[8][64],
int motion_x, int motion_y)
{
if (s->chroma_format == CHROMA_420)
mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6, 1);
else
mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8, 0);
}
static av_cold void mpeg12_encode_init_static(void)
{
static uint8_t mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
ff_rl_init(&ff_rl_mpeg1, mpeg12_static_rl_table_store[0]);
ff_rl_init(&ff_rl_mpeg2, mpeg12_static_rl_table_store[1]);
ff_mpeg1_init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
ff_mpeg1_init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
/* build unified dc encoding tables */
for (int 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) +
av_mod_uintp2(diff, index);
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) +
av_mod_uintp2(diff, index);
mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
}
for (int f_code = 1; f_code <= MAX_FCODE; f_code++)
for (int mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
int len;
if (mv == 0) {
len = 1; /* 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 = 10 /* ff_mpeg12_mbMotionVectorTable[16][1] */ +
2 + bit_size;
}
mv_penalty[f_code][mv + MAX_DMV] = len;
}
for (int f_code = MAX_FCODE; f_code > 0; f_code--)
for (int mv = -(8 << f_code); mv < (8 << f_code); mv++)
fcode_tab[mv + MAX_MV] = f_code;
}
av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
{
static AVOnce init_static_once = AV_ONCE_INIT;
ff_mpeg12_common_init(s);
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;
ff_thread_once(&init_static_once, mpeg12_encode_init_static);
}
#define OFFSET(x) offsetof(MPEG12EncContext, 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. Overrides timecode_frame_start.", \
OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE },\
{ "drop_frame_timecode", "Timecode is in drop frame format.", \
OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
{ "scan_offset", "Reserve space for SVCD scan offset user data.", \
OFFSET(scan_offset), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
{ "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
FF_MPV_COMMON_BFRAME_OPTS
static const AVOption mpeg1_options[] = {
COMMON_OPTS
FF_MPV_COMMON_OPTS
#if FF_API_MPEGVIDEO_OPTS
FF_MPV_DEPRECATED_MPEG_QUANT_OPT
FF_MPV_DEPRECATED_A53_CC_OPT
FF_MPV_DEPRECATED_MATRIX_OPT
#endif
{ NULL },
};
static const AVOption mpeg2_options[] = {
COMMON_OPTS
{ "intra_vlc", "Use MPEG-2 intra VLC table.",
FF_MPV_OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
{ "non_linear_quant", "Use nonlinear quantizer.", FF_MPV_OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
{ "alternate_scan", "Enable alternate scantable.", FF_MPV_OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
{ "a53cc", "Use A53 Closed Captions (if available)", OFFSET(a53_cc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE },
{ "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
{ "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
{ "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
{ "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
{ "video_format", "Video_format in the sequence_display_extension indicating the source of the video.", OFFSET(video_format), AV_OPT_TYPE_INT, { .i64 = VIDEO_FORMAT_UNSPECIFIED }, 0, 7, VE, "video_format" },
{ "component", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_COMPONENT }, 0, 0, VE, "video_format" },
{ "pal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_PAL }, 0, 0, VE, "video_format" },
{ "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_NTSC }, 0, 0, VE, "video_format" },
{ "secam", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_SECAM }, 0, 0, VE, "video_format" },
{ "mac", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_MAC }, 0, 0, VE, "video_format" },
{ "unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_UNSPECIFIED}, 0, 0, VE, "video_format" },
#define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, { .i64 = value }, 0, 0, VE, "avctx.level"
{ LEVEL("high", 4) },
{ LEVEL("high1440", 6) },
{ LEVEL("main", 8) },
{ LEVEL("low", 10) },
#undef LEVEL
FF_MPV_COMMON_OPTS
#if FF_API_MPEGVIDEO_OPTS
{ "mpeg_quant", "Deprecated, does nothing", FF_MPV_OFFSET(mpeg_quant),
AV_OPT_TYPE_INT, {.i64 = 1 }, 0, 1, VE | AV_OPT_FLAG_DEPRECATED },
FF_MPV_DEPRECATED_MATRIX_OPT
#endif
FF_MPEG2_PROFILE_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)
const FFCodec ff_mpeg1video_encoder = {
.p.name = "mpeg1video",
.p.long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_MPEG1VIDEO,
.priv_data_size = sizeof(MPEG12EncContext),
.init = encode_init,
FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
.close = ff_mpv_encode_end,
.p.supported_framerates = ff_mpeg12_frame_rate_tab + 1,
.p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
AV_PIX_FMT_NONE },
.p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
.p.priv_class = &mpeg1_class,
};
const FFCodec ff_mpeg2video_encoder = {
.p.name = "mpeg2video",
.p.long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_MPEG2VIDEO,
.priv_data_size = sizeof(MPEG12EncContext),
.init = encode_init,
FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
.close = ff_mpv_encode_end,
.p.supported_framerates = ff_mpeg2_frame_rate_tab,
.p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUV422P,
AV_PIX_FMT_NONE },
.p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
.p.priv_class = &mpeg2_class,
};
#endif /* CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER */
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