static double predict_size( predictor_t *p, double q, double var );
static void update_predictor( predictor_t *p, double q, double var, double bits );
+#define CMP_OPT_FIRST_PASS( opt, param_val )\
+{\
+ if( ( p = strstr( opts, opt "=" ) ) && sscanf( p, opt "=%d" , &i ) && param_val != i )\
+ {\
+ x264_log( h, X264_LOG_ERROR, "different " opt " setting than first pass (%d vs %d)\n", param_val, i );\
+ return -1;\
+ }\
+}
+
/* Terminology:
* qp = h.264's quantizer
* qscale = linearized quantizer = Lagrange multiplier
return output;
}
+void x264_ratecontrol_init_reconfigurable( x264_t *h, int b_init )
+{
+ x264_ratecontrol_t *rc = h->rc;
+ if( !b_init && rc->b_2pass )
+ return;
+
+ if( h->param.rc.i_vbv_max_bitrate > 0 && h->param.rc.i_vbv_buffer_size > 0 )
+ {
+ if( h->param.rc.i_vbv_buffer_size < (int)(h->param.rc.i_vbv_max_bitrate / rc->fps) )
+ {
+ h->param.rc.i_vbv_buffer_size = h->param.rc.i_vbv_max_bitrate / rc->fps;
+ x264_log( h, X264_LOG_WARNING, "VBV buffer size cannot be smaller than one frame, using %d kbit\n",
+ h->param.rc.i_vbv_buffer_size );
+ }
+
+ /* We don't support changing the ABR bitrate right now,
+ so if the stream starts as CBR, keep it CBR. */
+ if( rc->b_vbv_min_rate )
+ h->param.rc.i_vbv_max_bitrate = h->param.rc.i_bitrate;
+ rc->buffer_rate = h->param.rc.i_vbv_max_bitrate * 1000. / rc->fps;
+ rc->buffer_size = h->param.rc.i_vbv_buffer_size * 1000.;
+ rc->single_frame_vbv = rc->buffer_rate * 1.1 > rc->buffer_size;
+ rc->cbr_decay = 1.0 - rc->buffer_rate / rc->buffer_size
+ * 0.5 * X264_MAX(0, 1.5 - rc->buffer_rate * rc->fps / rc->bitrate);
+ if( b_init )
+ {
+ if( h->param.rc.f_vbv_buffer_init > 1. )
+ h->param.rc.f_vbv_buffer_init = x264_clip3f( h->param.rc.f_vbv_buffer_init / h->param.rc.i_vbv_buffer_size, 0, 1 );
+ h->param.rc.f_vbv_buffer_init = X264_MAX( h->param.rc.f_vbv_buffer_init, rc->buffer_rate / rc->buffer_size );
+ rc->buffer_fill_final = rc->buffer_size * h->param.rc.f_vbv_buffer_init;
+ rc->b_vbv = 1;
+ rc->b_vbv_min_rate = !rc->b_2pass
+ && h->param.rc.i_rc_method == X264_RC_ABR
+ && h->param.rc.i_vbv_max_bitrate <= h->param.rc.i_bitrate;
+ }
+ }
+ if( h->param.rc.i_rc_method == X264_RC_CRF )
+ {
+ /* Arbitrary rescaling to make CRF somewhat similar to QP.
+ * Try to compensate for MB-tree's effects as well. */
+ double base_cplx = h->mb.i_mb_count * (h->param.i_bframe ? 120 : 80);
+ double mbtree_offset = h->param.rc.b_mb_tree ? (1.0-h->param.rc.f_qcompress)*13.5 : 0;
+ rc->rate_factor_constant = pow( base_cplx, 1 - rc->qcompress )
+ / qp2qscale( h->param.rc.f_rf_constant + mbtree_offset );
+ }
+}
+
int x264_ratecontrol_new( x264_t *h )
{
x264_ratecontrol_t *rc;
x264_log(h, X264_LOG_ERROR, "constant rate-factor is incompatible with 2pass.\n");
return -1;
}
- if( h->param.rc.i_vbv_buffer_size )
- {
- if( h->param.rc.i_rc_method == X264_RC_CQP )
- {
- x264_log(h, X264_LOG_WARNING, "VBV is incompatible with constant QP, ignored.\n");
- h->param.rc.i_vbv_max_bitrate = 0;
- h->param.rc.i_vbv_buffer_size = 0;
- }
- else if( h->param.rc.i_vbv_max_bitrate == 0 )
- {
- x264_log( h, X264_LOG_DEBUG, "VBV maxrate unspecified, assuming CBR\n" );
- h->param.rc.i_vbv_max_bitrate = h->param.rc.i_bitrate;
- }
- }
- if( h->param.rc.i_vbv_max_bitrate < h->param.rc.i_bitrate &&
- h->param.rc.i_vbv_max_bitrate > 0)
- x264_log(h, X264_LOG_WARNING, "max bitrate less than average bitrate, ignored.\n");
- else if( h->param.rc.i_vbv_max_bitrate > 0 &&
- h->param.rc.i_vbv_buffer_size > 0 )
- {
- if( h->param.rc.i_vbv_buffer_size < (int)(h->param.rc.i_vbv_max_bitrate / rc->fps) )
- {
- h->param.rc.i_vbv_buffer_size = h->param.rc.i_vbv_max_bitrate / rc->fps;
- x264_log( h, X264_LOG_WARNING, "VBV buffer size cannot be smaller than one frame, using %d kbit\n",
- h->param.rc.i_vbv_buffer_size );
- }
- if( h->param.rc.f_vbv_buffer_init > 1. )
- h->param.rc.f_vbv_buffer_init = x264_clip3f( h->param.rc.f_vbv_buffer_init / h->param.rc.i_vbv_buffer_size, 0, 1 );
- rc->buffer_rate = h->param.rc.i_vbv_max_bitrate * 1000. / rc->fps;
- rc->buffer_size = h->param.rc.i_vbv_buffer_size * 1000.;
- rc->single_frame_vbv = rc->buffer_rate * 1.1 > rc->buffer_size;
- h->param.rc.f_vbv_buffer_init = X264_MAX( h->param.rc.f_vbv_buffer_init, rc->buffer_rate / rc->buffer_size );
- rc->buffer_fill_final = rc->buffer_size * h->param.rc.f_vbv_buffer_init;
- rc->cbr_decay = 1.0 - rc->buffer_rate / rc->buffer_size
- * 0.5 * X264_MAX(0, 1.5 - rc->buffer_rate * rc->fps / rc->bitrate);
- rc->b_vbv = 1;
- rc->b_vbv_min_rate = !rc->b_2pass
- && h->param.rc.i_rc_method == X264_RC_ABR
- && h->param.rc.i_vbv_max_bitrate <= h->param.rc.i_bitrate;
- }
- else if( h->param.rc.i_vbv_max_bitrate )
- {
- x264_log(h, X264_LOG_WARNING, "VBV maxrate specified, but no bufsize.\n");
- h->param.rc.i_vbv_max_bitrate = 0;
- }
- if(rc->rate_tolerance < 0.01)
+
+ x264_ratecontrol_init_reconfigurable( h, 1 );
+
+ if( rc->rate_tolerance < 0.01 )
{
x264_log(h, X264_LOG_WARNING, "bitrate tolerance too small, using .01\n");
rc->rate_tolerance = 0.01;
rc->last_non_b_pict_type = SLICE_TYPE_I;
}
- if( h->param.rc.i_rc_method == X264_RC_CRF )
- {
- /* Arbitrary rescaling to make CRF somewhat similar to QP.
- * Try to compensate for MB-tree's effects as well. */
- double base_cplx = h->mb.i_mb_count * (h->param.i_bframe ? 120 : 80);
- double mbtree_offset = h->param.rc.b_mb_tree ? (1.0-h->param.rc.f_qcompress)*13.5 : 0;
- rc->rate_factor_constant = pow( base_cplx, 1 - rc->qcompress )
- / qp2qscale( h->param.rc.f_rf_constant + mbtree_offset );
- }
-
rc->ip_offset = 6.0 * log(h->param.rc.f_ip_factor) / log(2.0);
rc->pb_offset = 6.0 * log(h->param.rc.f_pb_factor) / log(2.0);
rc->qp_constant[SLICE_TYPE_P] = h->param.rc.i_qp_constant;
rc->qp_constant[SLICE_TYPE_I] = x264_clip3( h->param.rc.i_qp_constant - rc->ip_offset + 0.5, 0, 51 );
rc->qp_constant[SLICE_TYPE_B] = x264_clip3( h->param.rc.i_qp_constant + rc->pb_offset + 0.5, 0, 51 );
+ h->mb.ip_offset = rc->ip_offset + 0.5;
rc->lstep = pow( 2, h->param.rc.i_qp_step / 6.0 );
rc->last_qscale = qp2qscale(26);
return -1;
}
- if( ( p = strstr( opts, "bframes=" ) ) && sscanf( p, "bframes=%d", &i )
- && h->param.i_bframe != i )
- {
- x264_log( h, X264_LOG_ERROR, "different number of B-frames than 1st pass (%d vs %d)\n",
- h->param.i_bframe, i );
- return -1;
- }
-
- if( ( p = strstr( opts, "wpredp=" ) ) && sscanf( p, "wpredp=%d", &i ) &&
- X264_MAX( 0, h->param.analyse.i_weighted_pred ) != i )
- {
- x264_log( h, X264_LOG_ERROR, "different weightp option than 1st pass (had weightp=%d)\n", i );
- return -1;
- }
-
- if( h->param.i_bframe && ( p = strstr( opts, "b_pyramid=" ) ) &&
- sscanf( p, "b_pyramid=%d", &i ) && h->param.i_bframe_pyramid != i )
- {
- x264_log( h, X264_LOG_ERROR, "different B-pyramid setting than 1st pass (%d vs %d)\n", h->param.i_bframe_pyramid, i );
- return -1;
- }
-
- if( ( p = strstr( opts, "keyint=" ) ) && sscanf( p, "keyint=%d", &i )
- && h->param.i_keyint_max != i )
- {
- x264_log( h, X264_LOG_ERROR, "different keyint than 1st pass (%d vs %d)\n",
- h->param.i_keyint_max, i );
- return -1;
- }
+ CMP_OPT_FIRST_PASS( "wpredp", X264_MAX( 0, h->param.analyse.i_weighted_pred ) );
+ CMP_OPT_FIRST_PASS( "bframes", h->param.i_bframe );
+ CMP_OPT_FIRST_PASS( "b_pyramid", h->param.i_bframe_pyramid );
+ CMP_OPT_FIRST_PASS( "intra_refresh", h->param.b_intra_refresh );
+ CMP_OPT_FIRST_PASS( "keyint", h->param.i_keyint_max );
if( strstr( opts, "qp=0" ) && h->param.rc.i_rc_method == X264_RC_ABR )
x264_log( h, X264_LOG_WARNING, "1st pass was lossless, bitrate prediction will be inaccurate\n" );
static int parse_zone( x264_t *h, x264_zone_t *z, char *p )
{
int len = 0;
- char *tok, UNUSED *saveptr;
+ char *tok, UNUSED *saveptr=NULL;
z->param = NULL;
z->f_bitrate_factor = 1;
if( 3 <= sscanf(p, "%u,%u,q=%u%n", &z->i_start, &z->i_end, &z->i_qp, &len) )
int i;
if( h->param.rc.psz_zones && !h->param.rc.i_zones )
{
- char *psz_zones, *p, *tok, UNUSED *saveptr;
+ char *psz_zones, *p;
CHECKED_MALLOC( psz_zones, strlen( h->param.rc.psz_zones )+1 );
strcpy( psz_zones, h->param.rc.psz_zones );
h->param.rc.i_zones = 1;
p = psz_zones;
for( i = 0; i < h->param.rc.i_zones; i++ )
{
- tok = strtok_r( p, "/", &saveptr );
- if( !tok || parse_zone( h, &h->param.rc.zones[i], tok ) )
+ int i_tok = strcspn( p, "/" );
+ p[i_tok] = 0;
+ if( parse_zone( h, &h->param.rc.zones[i], p ) )
return -1;
- p = NULL;
+ p += i_tok + 1;
}
x264_free( psz_zones );
}
/* Our QP is lower than the reference! */
else
{
- double newq = qp2qscale(qp);
- double oldq = qp2qscale(h->fref0[0]->i_row_qp[y]);
- double pred_intra = predict_size( rc->row_pred[1], (1 - newq / oldq) * newq, h->fdec->i_row_satds[0][0][y] );
+ double pred_intra = predict_size( rc->row_pred[1], qp2qscale(qp), h->fdec->i_row_satds[0][0][y] );
/* Sum: better to overestimate than underestimate by using only one of the two predictors. */
return pred_intra + pred_s;
}
update_predictor( rc->row_pred[0], qp2qscale(rc->qpm), h->fdec->i_row_satd[y], h->fdec->i_row_bits[y] );
if( h->sh.i_type == SLICE_TYPE_P && rc->qpm < h->fref0[0]->i_row_qp[y] )
- {
- double newq = qp2qscale(rc->qpm);
- double oldq = qp2qscale(h->fref0[0]->i_row_qp[y]);
- update_predictor( rc->row_pred[1], (1 - newq / oldq) * newq, h->fdec->i_row_satds[0][0][y], h->fdec->i_row_bits[y] );
- }
+ update_predictor( rc->row_pred[1], qp2qscale(rc->qpm), h->fdec->i_row_satds[0][0][y], h->fdec->i_row_bits[y] );
/* tweak quality based on difference from predicted size */
if( y < h->i_threadslice_end-1 )
float size_of_other_slices = rc->frame_size_planned - slice_size_planned;
/* More threads means we have to be more cautious in letting ratecontrol use up extra bits. */
float rc_tol = buffer_left_planned / h->param.i_threads * rc->rate_tolerance;
+ float max_frame_error = X264_MAX( 0.05, 1.0 / h->sps->i_mb_height );
int b1 = predict_row_size_sum( h, y, rc->qpm );
/* Assume that if this slice has become larger than expected,
/* avoid VBV underflow */
while( (rc->qpm < h->param.rc.i_qp_max)
- && (rc->buffer_fill - b1 < rc->buffer_rate * 0.05 ) )
+ && (rc->buffer_fill - b1 < rc->buffer_rate * max_frame_error) )
{
rc->qpm ++;
b1 = predict_row_size_sum( h, y, rc->qpm );
if( rct->buffer_fill_final < 0 )
x264_log( h, X264_LOG_WARNING, "VBV underflow (frame %d, %.0f bits)\n", h->i_frame, rct->buffer_fill_final );
rct->buffer_fill_final = X264_MAX( rct->buffer_fill_final, 0 );
- rct->buffer_fill_final += rct->buffer_rate;
- rct->buffer_fill_final = X264_MIN( rct->buffer_fill_final, rct->buffer_size );
+ rct->buffer_fill_final += rcc->buffer_rate;
+ rct->buffer_fill_final = X264_MIN( rct->buffer_fill_final, rcc->buffer_size );
}
// provisionally update VBV according to the planned size of all frames currently in progress
static void update_vbv_plan( x264_t *h, int overhead )
{
x264_ratecontrol_t *rcc = h->rc;
- rcc->buffer_fill = h->thread[0]->rc->buffer_fill_final - overhead;
- if( h->param.i_threads > 1 && !h->param.b_sliced_threads )
+ rcc->buffer_fill = h->thread[0]->rc->buffer_fill_final;
+ if( h->i_thread_frames > 1 )
{
int j = h->rc - h->thread[0]->rc;
int i;
- for( i=1; i<h->param.i_threads; i++ )
+ for( i=1; i<h->i_thread_frames; i++ )
{
- x264_t *t = h->thread[ (j+i)%h->param.i_threads ];
+ x264_t *t = h->thread[ (j+i)%h->i_thread_frames ];
double bits = t->rc->frame_size_planned;
if( !t->b_thread_active )
continue;
rcc->buffer_fill = X264_MIN( rcc->buffer_fill, rcc->buffer_size );
}
}
+ rcc->buffer_fill = X264_MIN( rcc->buffer_fill, rcc->buffer_size );
+ rcc->buffer_fill -= overhead;
}
// apply VBV constraints and clip qscale to between lmin and lmax
}
else
{
- double abr_buffer = 2 * rcc->rate_tolerance * rcc->bitrate;
+ double abr_buffer = 2 * rcc->rate_tolerance * rcc->bitrate * h->i_thread_frames;
if( rcc->b_2pass )
{
if( rcc->b_vbv )
{
- if( h->param.i_threads > 1 && !h->param.b_sliced_threads )
+ if( h->i_thread_frames > 1 )
{
int j = h->rc - h->thread[0]->rc;
int i;
- for( i=1; i<h->param.i_threads; i++ )
+ for( i=1; i<h->i_thread_frames; i++ )
{
- x264_t *t = h->thread[ (j+i)%h->param.i_threads ];
+ x264_t *t = h->thread[ (j+i)%h->i_thread_frames ];
double bits = t->rc->frame_size_planned;
if( !t->b_thread_active )
continue;
}
else
{
- if( h->fenc->i_frame < h->param.i_threads )
+ if( h->fenc->i_frame < h->i_thread_frames )
predicted_bits += (int64_t)h->fenc->i_frame * rcc->bitrate / rcc->fps;
else
- predicted_bits += (int64_t)(h->param.i_threads - 1) * rcc->bitrate / rcc->fps;
+ predicted_bits += (int64_t)(h->i_thread_frames - 1) * rcc->bitrate / rcc->fps;
}
diff = predicted_bits - (int64_t)rce.expected_bits;
q = rce.new_qscale;
q /= x264_clip3f((double)(abr_buffer - diff) / abr_buffer, .5, 2);
- if( ((h->fenc->i_frame + 1 - h->param.i_threads) >= rcc->fps) &&
+ if( ((h->fenc->i_frame + 1 - h->i_thread_frames) >= rcc->fps) &&
(rcc->expected_bits_sum > 0))
{
/* Adjust quant based on the difference between
}
else
{
- int i_frame_done = h->fenc->i_frame + 1 - h->param.i_threads;
+ int i_frame_done = h->fenc->i_frame + 1 - h->i_thread_frames;
q = get_qscale( h, &rce, rcc->wanted_bits_window / rcc->cplxr_sum, h->fenc->i_frame );
rcc->frame_size_planned = qscale2bits(&rce, q);
else
rcc->frame_size_planned = predict_size( &rcc->pred[h->sh.i_type], q, rcc->last_satd );
+
+ /* Always use up the whole VBV in this case. */
+ if( rcc->single_frame_vbv )
+ rcc->frame_size_planned = rcc->buffer_rate;
x264_ratecontrol_set_estimated_size(h, rcc->frame_size_planned);
return q;
}
totalsize += h->fdec->i_row_satd[row];
for( i = 0; i < h->param.i_threads; i++ )
{
- x264_ratecontrol_t *t = h->thread[i]->rc;
+ x264_t *t = h->thread[i];
x264_ratecontrol_t *rc = h->rc;
- memcpy( t, rc, sizeof( x264_ratecontrol_t ) );
+ memcpy( t->rc, rc, sizeof(x264_ratecontrol_t) );
/* Calculate the planned slice size. */
if( h->rc->b_vbv && rc->frame_size_planned )
{
int size = 0;
- for( row = h->i_threadslice_start; row < h->i_threadslice_end; row++ )
+ for( row = t->i_threadslice_start; row < t->i_threadslice_end; row++ )
size += h->fdec->i_row_satd[row];
- t->slice_size_planned = size * rc->frame_size_planned / totalsize;
+ t->rc->slice_size_planned = size * rc->frame_size_planned / totalsize;
}
else
- t->slice_size_planned = 0;
+ t->rc->slice_size_planned = 0;
}
}
#define COPY(var) memcpy(&cur->rc->var, &prev->rc->var, sizeof(cur->rc->var))
/* these vars are updated in x264_ratecontrol_start()
* so copy them from the context that most recently started (prev)
- * to the context that's about to start (cur).
- */
+ * to the context that's about to start (cur). */
COPY(accum_p_qp);
COPY(accum_p_norm);
COPY(last_satd);
COPY(bframes);
COPY(prev_zone);
COPY(qpbuf_pos);
+ /* these vars can be updated by x264_ratecontrol_init_reconfigurable */
+ COPY(buffer_rate);
+ COPY(buffer_size);
+ COPY(single_frame_vbv);
+ COPY(cbr_decay);
+ COPY(b_vbv_min_rate);
+ COPY(rate_factor_constant);
+ COPY(bitrate);
#undef COPY
}
if( cur != next )
#define COPY(var) next->rc->var = cur->rc->var
/* these vars are updated in x264_ratecontrol_end()
* so copy them from the context that most recently ended (cur)
- * to the context that's about to end (next)
- */
+ * to the context that's about to end (next) */
COPY(cplxr_sum);
COPY(expected_bits_sum);
COPY(wanted_bits_window);
expected_bits = 1;
for(i=0; i<rcc->num_entries; i++)
- expected_bits += qscale2bits(&rcc->entry[i], get_qscale(h, &rcc->entry[i], 1.0, i));
+ {
+ double q = get_qscale(h, &rcc->entry[i], 1.0, i);
+ expected_bits += qscale2bits(&rcc->entry[i], q);
+ rcc->last_qscale_for[rcc->entry[i].pict_type] = q;
+ }
step_mult = all_available_bits / expected_bits;
rate_factor = 0;
for(i=0; i<rcc->num_entries; i++)
{
qscale[i] = get_qscale(h, &rcc->entry[i], rate_factor, i);
+ rcc->last_qscale_for[rcc->entry[i].pict_type] = qscale[i];
}
/* fixed I/B qscale relative to P */
projects / x264 / blobdiff