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Code Issues Releases Activity

avcodec/mpegvideo: Move max_b_frames to MPVMainEncContext

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Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2025-03-18 11:20:25 +01:00
parent 6e02882656
commit 72bf3d3c12
5 changed files with 36 additions and 37 deletions
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17
libavcodec/mpeg4videoenc.c
View File

@ -650,11 +650,11 @@ static void mpeg4_encode_mb(MpegEncContext *const s, int16_t block[][64],
if ((cbp | motion_x | motion_y | s->dquant) == 0 &&
s->mv_type == MV_TYPE_16X16) {
const MPVMainEncContext *const m = slice_to_mainenc(s);
/* Check if the B-frames can skip it too, as we must skip it
* if we skip here why didn't they just compress
* the skip-mb bits instead of reusing them ?! */
if (s->max_b_frames > 0) {
int i;
if (m->max_b_frames > 0) {
int x, y, offset;
const uint8_t *p_pic;
@ -665,7 +665,7 @@ static void mpeg4_encode_mb(MpegEncContext *const s, int16_t block[][64],
p_pic = s->new_pic->data[0] + offset;
s->mb_skipped = 1;
for (i = 0; i < s->max_b_frames; i++) {
for (int i = 0; i < m->max_b_frames; i++) {
const uint8_t *b_pic;
int diff;
const MPVPicture *pic = s->reordered_input_picture[i + 1];
@ -929,14 +929,15 @@ static void mpeg4_encode_gop_header(MpegEncContext *s)
ff_mpeg4_stuffing(&s->pb);
}
static void mpeg4_encode_visual_object_header(MpegEncContext *s)
static void mpeg4_encode_visual_object_header(MPVMainEncContext *const m)
{
MpegEncContext *const s = &m->s;
int profile_and_level_indication;
int vo_ver_id;
if (s->avctx->profile != AV_PROFILE_UNKNOWN) {
profile_and_level_indication = s->avctx->profile << 4;
} else if (s->max_b_frames || s->quarter_sample) {
} else if (m->max_b_frames || s->quarter_sample) {
profile_and_level_indication = 0xF0; // adv simple
} else {
profile_and_level_indication = 0x00; // simple
@ -978,7 +979,7 @@ static void mpeg4_encode_vol_header(Mpeg4EncContext *const m4,
MpegEncContext *const s = &m4->m.s;
int vo_ver_id, vo_type, aspect_ratio_info;
if (s->max_b_frames || s->quarter_sample) {
if (m4->m.max_b_frames || s->quarter_sample) {
vo_ver_id = 5;
vo_type = ADV_SIMPLE_VO_TYPE;
} else {
@ -1072,7 +1073,7 @@ static int mpeg4_encode_picture_header(MPVMainEncContext *const m)
if (s->pict_type == AV_PICTURE_TYPE_I) {
if (!(s->avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)) {
if (s->avctx->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) // HACK, the reference sw is buggy
mpeg4_encode_visual_object_header(s);
mpeg4_encode_visual_object_header(m);
if (s->avctx->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || s->picture_number == 0) // HACK, the reference sw is buggy
mpeg4_encode_vol_header(m4, 0, 0);
}
@ -1339,7 +1340,7 @@ static av_cold int encode_init(AVCodecContext *avctx)
return AVERROR(ENOMEM);
init_put_bits(&s->pb, s->avctx->extradata, 1024);
mpeg4_encode_visual_object_header(s);
mpeg4_encode_visual_object_header(m);
mpeg4_encode_vol_header(m4, 0, 0);
// ff_mpeg4_stuffing(&s->pb); ?

1
libavcodec/mpegvideo.h
View File

@ -106,7 +106,6 @@ typedef struct MpegEncContext {
enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
int encoding; ///< true if we are encoding (vs decoding)
int max_b_frames; ///< max number of B-frames for encoding
int luma_elim_threshold;
int chroma_elim_threshold;
int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically

48
libavcodec/mpegvideo_enc.c
View File

@ -470,9 +470,9 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
"max b frames must be 0 or positive for mpegvideo based encoders\n");
return AVERROR(EINVAL);
}
s->max_b_frames = avctx->max_b_frames;
m->max_b_frames = avctx->max_b_frames;
s->codec_id = avctx->codec->id;
if (s->max_b_frames && !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY)) {
if (m->max_b_frames && !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY)) {
av_log(avctx, AV_LOG_ERROR, "B-frames not supported by codec\n");
return AVERROR(EINVAL);
}
@ -692,7 +692,7 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
"set strict_std_compliance to 'unofficial' or lower in order to allow it\n");
return AVERROR(EINVAL);
}
if (s->max_b_frames != 0) {
if (m->max_b_frames != 0) {
av_log(avctx, AV_LOG_ERROR,
"B-frames cannot be used with low delay\n");
return AVERROR(EINVAL);
@ -744,7 +744,7 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
case AV_CODEC_ID_MPEG1VIDEO:
s->out_format = FMT_MPEG1;
s->low_delay = !!(avctx->flags & AV_CODEC_FLAG_LOW_DELAY);
avctx->delay = s->low_delay ? 0 : (s->max_b_frames + 1);
avctx->delay = s->low_delay ? 0 : (m->max_b_frames + 1);
ff_mpeg1_encode_init(s);
break;
#endif
@ -834,8 +834,8 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
s->h263_pred = 1;
s->unrestricted_mv = 1;
s->flipflop_rounding = 1;
s->low_delay = s->max_b_frames ? 0 : 1;
avctx->delay = s->low_delay ? 0 : (s->max_b_frames + 1);
s->low_delay = m->max_b_frames ? 0 : 1;
avctx->delay = s->low_delay ? 0 : (m->max_b_frames + 1);
break;
case AV_CODEC_ID_MSMPEG4V2:
s->out_format = FMT_H263;
@ -1013,7 +1013,7 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
return ret;
if (m->b_frame_strategy == 2) {
for (i = 0; i < s->max_b_frames + 2; i++) {
for (int i = 0; i < m->max_b_frames + 2; i++) {
m->tmp_frames[i] = av_frame_alloc();
if (!m->tmp_frames[i])
return AVERROR(ENOMEM);
@ -1255,7 +1255,7 @@ static int load_input_picture(MPVMainEncContext *const m, const AVFrame *pic_arg
MPVPicture *pic = NULL;
int64_t pts;
int display_picture_number = 0, ret;
int encoding_delay = s->max_b_frames ? s->max_b_frames
int encoding_delay = m->max_b_frames ? m->max_b_frames
: (s->low_delay ? 0 : 1);
int flush_offset = 1;
int direct = 1;
@ -1461,7 +1461,7 @@ static int estimate_best_b_count(MPVMainEncContext *const m)
const int scale = m->brd_scale;
int width = s->width >> scale;
int height = s->height >> scale;
int i, j, out_size, p_lambda, b_lambda, lambda2;
int out_size, p_lambda, b_lambda, lambda2;
int64_t best_rd = INT64_MAX;
int best_b_count = -1;
int ret = 0;
@ -1481,7 +1481,7 @@ static int estimate_best_b_count(MPVMainEncContext *const m)
lambda2 = (b_lambda * b_lambda + (1 << FF_LAMBDA_SHIFT) / 2) >>
FF_LAMBDA_SHIFT;
for (i = 0; i < s->max_b_frames + 2; i++) {
for (int i = 0; i < m->max_b_frames + 2; i++) {
const MPVPicture *pre_input_ptr = i ? s->input_picture[i - 1] :
s->next_pic.ptr;
@ -1513,7 +1513,7 @@ static int estimate_best_b_count(MPVMainEncContext *const m)
}
}
for (j = 0; j < s->max_b_frames + 1; j++) {
for (int j = 0; j < m->max_b_frames + 1; j++) {
AVCodecContext *c;
int64_t rd = 0;
@ -1536,7 +1536,7 @@ static int estimate_best_b_count(MPVMainEncContext *const m)
c->me_sub_cmp = s->avctx->me_sub_cmp;
c->pix_fmt = AV_PIX_FMT_YUV420P;
c->time_base = s->avctx->time_base;
c->max_b_frames = s->max_b_frames;
c->max_b_frames = m->max_b_frames;
ret = avcodec_open2(c, s->avctx->codec, NULL);
if (ret < 0)
@ -1554,8 +1554,8 @@ static int estimate_best_b_count(MPVMainEncContext *const m)
//rd += (out_size * lambda2) >> FF_LAMBDA_SHIFT;
for (i = 0; i < s->max_b_frames + 1; i++) {
int is_p = i % (j + 1) == j || i == s->max_b_frames;
for (int i = 0; i < m->max_b_frames + 1; i++) {
int is_p = i % (j + 1) == j || i == m->max_b_frames;
m->tmp_frames[i + 1]->pict_type = is_p ?
AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_B;
@ -1640,7 +1640,7 @@ static int set_bframe_chain_length(MPVMainEncContext *const m)
int b_frames = 0;
if (s->avctx->flags & AV_CODEC_FLAG_PASS2) {
for (int i = 0; i < s->max_b_frames + 1; i++) {
for (int i = 0; i < m->max_b_frames + 1; i++) {
int pict_num = s->input_picture[0]->display_picture_number + i;
if (pict_num >= m->rc_context.num_entries)
@ -1656,12 +1656,11 @@ static int set_bframe_chain_length(MPVMainEncContext *const m)
}
if (m->b_frame_strategy == 0) {
b_frames = s->max_b_frames;
b_frames = m->max_b_frames;
while (b_frames && !s->input_picture[b_frames])
b_frames--;
} else if (m->b_frame_strategy == 1) {
int i;
for (i = 1; i < s->max_b_frames + 1; i++) {
for (int i = 1; i < m->max_b_frames + 1; i++) {
if (s->input_picture[i] &&
s->input_picture[i]->b_frame_score == 0) {
s->input_picture[i]->b_frame_score =
@ -1671,19 +1670,18 @@ static int set_bframe_chain_length(MPVMainEncContext *const m)
s->linesize) + 1;
}
}
for (i = 0; i < s->max_b_frames + 1; i++) {
for (int i = 0; i < m->max_b_frames + 1; i++) {
if (!s->input_picture[i] ||
s->input_picture[i]->b_frame_score - 1 >
s->mb_num / m->b_sensitivity)
s->mb_num / m->b_sensitivity) {
b_frames = FFMAX(0, i - 1);
break;
}
b_frames = FFMAX(0, i - 1);
}
/* reset scores */
for (i = 0; i < b_frames + 1; i++) {
for (int i = 0; i < b_frames + 1; i++)
s->input_picture[i]->b_frame_score = 0;
}
} else if (m->b_frame_strategy == 2) {
b_frames = estimate_best_b_count(m);
if (b_frames < 0) {
@ -1700,7 +1698,7 @@ static int set_bframe_chain_length(MPVMainEncContext *const m)
b_frames = i;
}
if (s->input_picture[b_frames]->f->pict_type == AV_PICTURE_TYPE_B &&
b_frames == s->max_b_frames) {
b_frames == m->max_b_frames) {
av_log(s->avctx, AV_LOG_ERROR,
"warning, too many B-frames in a row\n");
}

1
libavcodec/mpegvideoenc.h
View File

@ -42,6 +42,7 @@ typedef struct MPVMainEncContext {
int intra_only; ///< if true, only intra pictures are generated
int gop_size;
int max_b_frames; ///< max number of B-frames
int picture_in_gop_number; ///< 0-> first pic in gop, ...
int input_picture_number; ///< used to set pic->display_picture_number
int coded_picture_number; ///< used to set pic->coded_picture_number

6
libavcodec/ratecontrol.c
View File

@ -581,7 +581,7 @@ av_cold int ff_rate_control_init(MPVMainEncContext *const m)
p = s->avctx->stats_in;
for (i = -1; p; i++)
p = strchr(p + 1, ';');
i += s->max_b_frames;
i += m->max_b_frames;
if (i <= 0 || i >= INT_MAX / sizeof(RateControlEntry))
return -1;
rcc->entry = av_mallocz(i * sizeof(RateControlEntry));
@ -602,7 +602,7 @@ av_cold int ff_rate_control_init(MPVMainEncContext *const m)
/* read stats */
p = s->avctx->stats_in;
for (i = 0; i < rcc->num_entries - s->max_b_frames; i++) {
for (i = 0; i < rcc->num_entries - m->max_b_frames; i++) {
RateControlEntry *rce;
int picture_number;
int e;
@ -663,7 +663,7 @@ av_cold int ff_rate_control_init(MPVMainEncContext *const m)
if (i % ((m->gop_size + 3) / 4) == 0)
rce.pict_type = AV_PICTURE_TYPE_I;
else if (i % (s->max_b_frames + 1))
else if (i % (m->max_b_frames + 1))
rce.pict_type = AV_PICTURE_TYPE_B;
else
rce.pict_type = AV_PICTURE_TYPE_P;