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Diffstat (limited to 'libavcodec/mpeg12enc.c')
-rw-r--r--libavcodec/mpeg12enc.c110
1 files changed, 75 insertions, 35 deletions
diff --git a/libavcodec/mpeg12enc.c b/libavcodec/mpeg12enc.c
index da344e5ad3..4a54ed58ec 100644
--- a/libavcodec/mpeg12enc.c
+++ b/libavcodec/mpeg12enc.c
@@ -3,20 +3,20 @@
* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -33,9 +33,10 @@
#include "mpeg12.h"
#include "mpeg12data.h"
#include "bytestream.h"
-
#include "libavutil/log.h"
#include "libavutil/opt.h"
+#include "libavutil/avassert.h"
+#include "libavutil/timecode.h"
static const uint8_t inv_non_linear_qscale[13] = {
0, 2, 4, 6, 8,
@@ -107,21 +108,34 @@ static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
static int find_frame_rate_index(MpegEncContext *s){
int i;
- int64_t dmin= INT64_MAX;
- int64_t d;
+ AVRational bestq= (AVRational){0, 0};
+ AVRational ext;
+ AVRational target = av_inv_q(s->avctx->time_base);
for(i=1;i<14;i++) {
- int64_t n0 = 1001LL / ff_mpeg12_frame_rate_tab[i].den * ff_mpeg12_frame_rate_tab[i].num * s->avctx->time_base.num;
- int64_t n1= 1001LL*s->avctx->time_base.den;
if(s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL && i>=9) break;
- d = FFABS(n0 - n1);
- if(d < dmin){
- dmin=d;
- s->frame_rate_index= i;
+ for (ext.num=1; ext.num <= 4; ext.num++) {
+ for (ext.den=1; ext.den <= 32; ext.den++) {
+ AVRational q = av_mul_q(ext, ff_mpeg12_frame_rate_tab[i]);
+
+ if(s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
+ continue;
+ if(av_gcd(ext.den, ext.num) != 1)
+ continue;
+
+ if( bestq.num==0
+ || av_nearer_q(target, bestq, q) < 0
+ || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0){
+ bestq = q;
+ s->frame_rate_index= i;
+ s->mpeg2_frame_rate_ext.num = ext.num;
+ s->mpeg2_frame_rate_ext.den = ext.den;
+ }
+ }
}
}
- if(dmin)
+ if(av_cmp_q(target, bestq))
return -1;
else
return 0;
@@ -131,6 +145,9 @@ static av_cold int encode_init(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
+ if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)
+ avctx->thread_count = 1;
+
if(ff_MPV_encode_init(avctx) < 0)
return -1;
@@ -166,11 +183,37 @@ static av_cold int encode_init(AVCodecContext *avctx)
}
}
+ if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
+ av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
+ return AVERROR(EINVAL);
+ }
+
+ if (s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
+ if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
+ av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiplies of 4096\n"
+ "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
+ return AVERROR(EINVAL);
+ }
+ }
+
+ s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
+ if (s->drop_frame_timecode)
+ s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
if (s->drop_frame_timecode && s->frame_rate_index != 4) {
av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
return -1;
}
+ if (s->tc_opt_str) {
+ AVRational rate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
+ int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
+ if (ret < 0)
+ return ret;
+ s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
+ s->avctx->timecode_frame_start = s->tc.start;
+ } else {
+ s->avctx->timecode_frame_start = 0; // default is -1
+ }
return 0;
}
@@ -200,8 +243,8 @@ static void mpeg1_encode_sequence_header(MpegEncContext *s)
/* mpeg1 header repeated every gop */
put_header(s, SEQ_START_CODE);
- put_sbits(&s->pb, 12, s->width );
- put_sbits(&s->pb, 12, s->height);
+ put_sbits(&s->pb, 12, s->width & 0xFFF);
+ put_sbits(&s->pb, 12, s->height & 0xFFF);
for(i=1; i<15; i++){
float error= aspect_ratio;
@@ -272,8 +315,8 @@ static void mpeg1_encode_sequence_header(MpegEncContext *s)
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, 0); // frame_rate_ext_n
- put_bits(&s->pb, 5, 0); // frame_rate_ext_d
+ put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
+ put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
}
put_header(s, GOP_START_CODE);
@@ -284,13 +327,9 @@ static void mpeg1_encode_sequence_header(MpegEncContext *s)
time_code = s->current_picture_ptr->f.coded_picture_number + s->avctx->timecode_frame_start;
s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
- if (s->drop_frame_timecode) {
- /* only works for NTSC 29.97 */
- int d = time_code / 17982;
- int m = time_code % 17982;
- //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */
- time_code += 18 * d + 2 * ((m - 2) / 1798);
- }
+ av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
+ if (s->drop_frame_timecode)
+ time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
put_bits(&s->pb, 1, 1);
@@ -313,7 +352,7 @@ static inline void encode_mb_skip_run(MpegEncContext *s, int run){
static av_always_inline void put_qscale(MpegEncContext *s)
{
if(s->q_scale_type){
- assert(s->qscale>=1 && s->qscale <=12);
+ av_assert2(s->qscale>=1 && s->qscale <=12);
put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
}else{
put_bits(&s->pb, 5, s->qscale);
@@ -321,7 +360,7 @@ static av_always_inline void put_qscale(MpegEncContext *s)
}
void ff_mpeg1_encode_slice_header(MpegEncContext *s){
- if (s->height > 2800) {
+ if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
put_bits(&s->pb, 3, s->mb_y >> 7); /* slice_vertical_position_extension */
} else {
@@ -385,7 +424,7 @@ void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
}
put_bits(&s->pb, 2, s->intra_dc_precision);
- assert(s->picture_structure == PICT_FRAME);
+ 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 */
@@ -449,7 +488,7 @@ static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
}
if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
- (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
+ (mb_x != s->mb_width - 1 || (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
(s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
@@ -464,7 +503,7 @@ static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
}
} else {
if(first_mb){
- assert(s->mb_skip_run == 0);
+ 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);
@@ -527,7 +566,7 @@ static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *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{
- assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
+ av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
if (cbp) {
if(s->dquant){
@@ -594,8 +633,8 @@ static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
s->b_count++;
}
}else{
- assert(s->mv_type == MV_TYPE_FIELD);
- assert(!s->frame_pred_frame_dct);
+ 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)
@@ -690,7 +729,7 @@ static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
sign = 1;
}
- assert(code > 0 && code <= 16);
+ av_assert2(code > 0 && code <= 16);
put_bits(&s->pb,
ff_mpeg12_mbMotionVectorTable[code][1],
@@ -921,6 +960,7 @@ static void mpeg1_encode_block(MpegEncContext *s,
#define OFFSET(x) offsetof(MpegEncContext, x)
#define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
#define COMMON_OPTS\
+ { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
{ "intra_vlc", "Use MPEG-2 intra VLC table.", OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },\
{ "drop_frame_timecode", "Timecode is in drop frame format.", OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE}, \
{ "scan_offset", "Reserve space for SVCD scan offset user data.", OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
@@ -974,7 +1014,7 @@ AVCodec ff_mpeg2video_encoder = {
.init = encode_init,
.encode2 = ff_MPV_encode_picture,
.close = ff_MPV_encode_end,
- .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
+ .supported_framerates = ff_mpeg2_frame_rate_tab,
.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE
},
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 08:55:21 +0000