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Further rate control tweaks and fixes.

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Further fixes regarding min and max rate.
Bug fixes re kf group bits and last kf group.

Change-Id: Iaafd719d30a489e135a3c55851ce8c632091a436
This commit is contained in:
Paul Wilkins 2014-01-09 16:10:57 +00:00
parent f83c12b540
commit 603075fa04
1 changed files with 12 additions and 39 deletions
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51
vp9/encoder/vp9_firstpass.c
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@ -106,6 +106,7 @@ static int lookup_next_frame_stats(const struct twopass_rc *p,
return 1;
}
// Read frame stats at an offset from the current position
static int read_frame_stats(const struct twopass_rc *p,
FIRSTPASS_STATS *frame_stats, int offset) {
@ -149,7 +150,7 @@ static void output_stats(const VP9_COMP *cpi,
FILE *fpfile;
fpfile = fopen("firstpass.stt", "a");
fprintf(stdout, "%12.0f %12.0f %12.0f %12.0f %12.0f %12.4f %12.4f"
fprintf(fpfile, "%12.0f %12.0f %12.0f %12.0f %12.0f %12.4f %12.4f"
"%12.4f %12.4f %12.4f %12.4f %12.4f %12.4f %12.4f"
"%12.0f %12.0f %12.4f %12.0f %12.0f %12.4f\n",
stats->frame,
@ -349,17 +350,14 @@ static double simple_weight(YV12_BUFFER_CONFIG *source) {
}
// This function returns the current per frame maximum bitrate target.
// This function returns the maximum target rate per frame.
static int frame_max_bits(VP9_COMP *cpi) {
// Max allocation for a single frame based on the max section guidelines
// passed in and how many bits are left.
// For VBR base this on the bits and frames left plus the
// two_pass_vbrmax_section rate passed in by the user.
const double max_bits = (1.0 * cpi->twopass.bits_left /
(cpi->twopass.total_stats.count - cpi->common.current_video_frame)) *
(cpi->oxcf.two_pass_vbrmax_section / 100.0);
int64_t max_bits =
((int64_t)cpi->rc.av_per_frame_bandwidth *
(int64_t)cpi->oxcf.two_pass_vbrmax_section) / 100;
if (max_bits < 0)
return 0;
return 0;
if (max_bits >= INT_MAX)
return INT_MAX;
return (int)max_bits;
@ -1765,18 +1763,6 @@ static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
#endif
#endif
// Now decide how many bits should be allocated to the GF group as a
// proportion of those remaining in the kf group.
// The final key frame group in the clip is treated as a special case
// where cpi->twopass.kf_group_bits is tied to cpi->twopass.bits_left.
// This is also important for short clips where there may only be one
// key frame.
if (cpi->rc.frames_to_key >= (int)(cpi->twopass.total_stats.count -
cpi->common.current_video_frame)) {
cpi->twopass.kf_group_bits =
(cpi->twopass.bits_left > 0) ? cpi->twopass.bits_left : 0;
}
// Calculate the bits to be allocated to the group as a whole
if ((cpi->twopass.kf_group_bits > 0) &&
(cpi->twopass.kf_group_error_left > 0)) {
@ -1863,9 +1849,6 @@ static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
if (gf_bits < 0)
gf_bits = 0;
// Add in minimum for a frame
gf_bits += cpi->rc.min_frame_bandwidth;
if (i == 0) {
cpi->twopass.gf_bits = gf_bits;
}
@ -1899,8 +1882,7 @@ static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
cpi->twopass.gf_group_error_left = (int64_t)gf_group_err;
}
cpi->twopass.gf_group_bits -= cpi->twopass.gf_bits
- cpi->rc.min_frame_bandwidth;
cpi->twopass.gf_group_bits -= cpi->twopass.gf_bits;
if (cpi->twopass.gf_group_bits < 0)
cpi->twopass.gf_group_bits = 0;
@ -1985,9 +1967,6 @@ static void assign_std_frame_bits(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
if (cpi->twopass.gf_group_bits < 0)
cpi->twopass.gf_group_bits = 0;
// Add in the minimum number of bits that is set aside for every frame.
target_frame_size += cpi->rc.min_frame_bandwidth;
// Per frame bit target for this frame.
cpi->rc.per_frame_bandwidth = target_frame_size;
}
@ -2281,8 +2260,8 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
vp9_zero(next_frame);
vp9_clear_system_state(); // __asm emms;
start_position = cpi->twopass.stats_in;
start_position = cpi->twopass.stats_in;
cpi->common.frame_type = KEY_FRAME;
// is this a forced key frame by interval
@ -2364,7 +2343,6 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
// interval is between 1x and 2x
if (cpi->oxcf.auto_key
&& cpi->rc.frames_to_key > (int)cpi->key_frame_frequency) {
FIRSTPASS_STATS *current_pos = cpi->twopass.stats_in;
FIRSTPASS_STATS tmp_frame;
cpi->rc.frames_to_key /= 2;
@ -2389,15 +2367,12 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
// Load a the next frame's stats
input_stats(&cpi->twopass, &tmp_frame);
}
// Reset to the start of the group
reset_fpf_position(&cpi->twopass, current_pos);
cpi->rc.next_key_frame_forced = 1;
} else {
cpi->rc.next_key_frame_forced = 0;
}
// Special case for the last frame of the file
// Special case for the last key frame of the file
if (cpi->twopass.stats_in >= cpi->twopass.stats_in_end) {
// Accumulate kf group error
kf_group_err += calculate_modified_err(cpi, this_frame);
@ -2582,8 +2557,6 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
}
cpi->twopass.kf_group_bits -= cpi->twopass.kf_bits;
// Add in the minimum frame allowance
cpi->twopass.kf_bits += cpi->rc.min_frame_bandwidth;
// Peer frame bit target for this frame
cpi->rc.per_frame_bandwidth = cpi->twopass.kf_bits;