generic-library/vpx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Merge "Update to vpx_temporal_scalable_patterns test:"

Browse Source
This commit is contained in:
Marco Paniconi 2014-02-13 10:08:42 -08:00 committed by Gerrit Code Review
commit f4bfe1fec2
1 changed files with 112 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

124
examples/vpx_temporal_scalable_patterns.c
View File

@ -12,6 +12,7 @@
// encoding scheme based on temporal scalability for video applications
// that benefit from a scalable bitstream.
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -31,6 +32,86 @@ void usage_exit() {
static int mode_to_num_layers[12] = {1, 2, 2, 3, 3, 3, 3, 5, 2, 3, 3, 3};
// For rate control encoding stats.
struct RateControlMetrics {
// Number of input frames per layer.
int layer_input_frames[VPX_TS_MAX_LAYERS];
// Total (cumulative) number of encoded frames per layer.
int layer_tot_enc_frames[VPX_TS_MAX_LAYERS];
// Number of encoded non-key frames per layer.
int layer_enc_frames[VPX_TS_MAX_LAYERS];
// Framerate per layer layer (cumulative).
float layer_framerate[VPX_TS_MAX_LAYERS];
// Target average frame size per layer (per-frame-bandwidth per layer).
float layer_pfb[VPX_TS_MAX_LAYERS];
// Actual average frame size per layer.
float layer_avg_frame_size[VPX_TS_MAX_LAYERS];
// Average rate mismatch per layer (|target - actual| / target).
float layer_avg_rate_mismatch[VPX_TS_MAX_LAYERS];
// Actual encoding bitrate per layer (cumulative).
float layer_encoding_bitrate[VPX_TS_MAX_LAYERS];
};
static void set_rate_control_metrics(struct RateControlMetrics *rc,
vpx_codec_enc_cfg_t *cfg) {
int i = 0;
// Set the layer (cumulative) framerate and the target layer (non-cumulative)
// per-frame-bandwidth, for the rate control encoding stats below.
float framerate = cfg->g_timebase.den / cfg->g_timebase.num;
rc->layer_framerate[0] = framerate / cfg->ts_rate_decimator[0];
rc->layer_pfb[0] = 1000.0 * cfg->ts_target_bitrate[0] /
rc->layer_framerate[0];
for (i = 0; i < cfg->ts_number_layers; ++i) {
if (i > 0) {
rc->layer_framerate[i] = framerate / cfg->ts_rate_decimator[i];
rc->layer_pfb[i] = 1000.0 *
(cfg->ts_target_bitrate[i] - cfg->ts_target_bitrate[i - 1]) /
(rc->layer_framerate[i] - rc->layer_framerate[i - 1]);
}
rc->layer_input_frames[i] = 0;
rc->layer_enc_frames[i] = 0;
rc->layer_tot_enc_frames[i] = 0;
rc->layer_encoding_bitrate[i] = 0.0;
rc->layer_avg_frame_size[i] = 0.0;
rc->layer_avg_rate_mismatch[i] = 0.0;
}
}
static void printout_rate_control_summary(struct RateControlMetrics *rc,
vpx_codec_enc_cfg_t *cfg,
int frame_cnt) {
int i = 0;
int check_num_frames = 0;
printf("Total number of processed frames: %d\n\n", frame_cnt -1);
printf("Rate control layer stats for %d layer(s):\n\n",
cfg->ts_number_layers);
for (i = 0; i < cfg->ts_number_layers; ++i) {
const int num_dropped = (i > 0) ?
(rc->layer_input_frames[i] - rc->layer_enc_frames[i]) :
(rc->layer_input_frames[i] - rc->layer_enc_frames[i] - 1);
rc->layer_encoding_bitrate[i] = 0.001 * rc->layer_framerate[i] *
rc->layer_encoding_bitrate[i] / rc->layer_tot_enc_frames[i];
rc->layer_avg_frame_size[i] = rc->layer_avg_frame_size[i] /
rc->layer_enc_frames[i];
rc->layer_avg_rate_mismatch[i] = 100.0 * rc->layer_avg_rate_mismatch[i] /
rc->layer_enc_frames[i];
printf("For layer#: %d \n", i);
printf("Bitrate (target vs actual): %d %f \n", cfg->ts_target_bitrate[i],
rc->layer_encoding_bitrate[i]);
printf("Average frame size (target vs actual): %f %f \n", rc->layer_pfb[i],
rc->layer_avg_frame_size[i]);
printf("Average rate_mismatch: %f \n", rc->layer_avg_rate_mismatch[i]);
printf("Number of input frames, encoded (non-key) frames, "
"and perc dropped frames: %d %d %f \n", rc->layer_input_frames[i],
rc->layer_enc_frames[i],
100.0 * num_dropped / rc->layer_input_frames[i]);
check_num_frames += rc->layer_input_frames[i];
printf("\n");
}
if ((frame_cnt - 1) != check_num_frames)
die("Error: Number of input frames not equal to output! \n");
}
// Temporal scaling parameters:
// NOTE: The 3 prediction frames cannot be used interchangeably due to
// differences in the way they are handled throughout the code. The
@ -355,20 +436,20 @@ int main(int argc, char **argv) {
int pts = 0; // PTS starts at 0.
int frame_duration = 1; // 1 timebase tick per frame.
int layering_mode = 0;
int frames_in_layer[VPX_TS_MAX_LAYERS] = {0};
int layer_flags[VPX_TS_MAX_PERIODICITY] = {0};
int flag_periodicity = 1;
int max_intra_size_pct;
vpx_svc_layer_id_t layer_id = {0, 0};
const VpxInterface *encoder = NULL;
struct VpxInputContext input_ctx = {0};
struct RateControlMetrics rc;
exec_name = argv[0];
// Check usage and arguments.
if (argc < 10) {
if (argc < 11) {
die("Usage: %s <infile> <outfile> <codec_type(vp8/vp9)> <width> <height> "
"<rate_num> <rate_den> <mode> <Rate_0> ... <Rate_nlayers-1> \n",
argv[0]);
"<rate_num> <rate_den> <frame_drop_threshold> <mode> "
"<Rate_0> ... <Rate_nlayers-1> \n", argv[0]);
}
encoder = get_vpx_encoder_by_name(argv[3]);
@ -383,12 +464,12 @@ int main(int argc, char **argv) {
die("Invalid resolution: %d x %d", width, height);
}
layering_mode = strtol(argv[8], NULL, 0);
if (layering_mode < 0 || layering_mode > 11) {
die("Invalid mode (0..11) %s", argv[8]);
layering_mode = strtol(argv[9], NULL, 0);
if (layering_mode < 0 || layering_mode > 12) {
die("Invalid mode (0..12) %s", argv[9]);
}
if (argc != 9 + mode_to_num_layers[layering_mode]) {
if (argc != 10 + mode_to_num_layers[layering_mode]) {
die("Invalid number of arguments");
}
@ -411,12 +492,12 @@ int main(int argc, char **argv) {
cfg.g_timebase.num = strtol(argv[6], NULL, 0);
cfg.g_timebase.den = strtol(argv[7], NULL, 0);
for (i = 9; i < 9 + mode_to_num_layers[layering_mode]; ++i) {
cfg.ts_target_bitrate[i - 9] = strtol(argv[i], NULL, 0);
for (i = 10; i < 10 + mode_to_num_layers[layering_mode]; ++i) {
cfg.ts_target_bitrate[i - 10] = strtol(argv[i], NULL, 0);
}
// Real time parameters.
cfg.rc_dropframe_thresh = 0;
cfg.rc_dropframe_thresh = strtol(argv[8], NULL, 0);
cfg.rc_end_usage = VPX_CBR;
cfg.rc_resize_allowed = 0;
cfg.rc_min_quantizer = 2;
@ -443,6 +524,8 @@ int main(int argc, char **argv) {
layer_flags,
&flag_periodicity);
set_rate_control_metrics(&rc, &cfg);
// Open input file.
input_ctx.filename = argv[1];
if (!(input_ctx.file = fopen(input_ctx.filename, "rb"))) {
@ -494,9 +577,13 @@ int main(int argc, char **argv) {
layer_id.spatial_layer_id = 0;
layer_id.temporal_layer_id =
cfg.ts_layer_id[frame_cnt % cfg.ts_periodicity];
if (strncmp(encoder->name, "vp9", 3) == 0) {
vpx_codec_control(&codec, VP9E_SET_SVC_LAYER_ID, &layer_id);
}
flags = layer_flags[frame_cnt % flag_periodicity];
frame_avail = !read_yuv_frame(&input_ctx, &raw);
if (frame_avail)
++rc.layer_input_frames[layer_id.temporal_layer_id];
if (vpx_codec_encode(&codec, frame_avail? &raw : NULL, pts, 1, flags,
VPX_DL_REALTIME)) {
die_codec(&codec, "Failed to encode frame");
@ -514,7 +601,17 @@ int main(int argc, char **argv) {
i < cfg.ts_number_layers; ++i) {
vpx_video_writer_write_frame(outfile[i], pkt->data.frame.buf,
pkt->data.frame.sz, pts);
++frames_in_layer[i];
++rc.layer_tot_enc_frames[i];
rc.layer_encoding_bitrate[i] += 8.0 * pkt->data.frame.sz;
// Keep count of rate control stats per layer (for non-key frames).
if (i == cfg.ts_layer_id[frame_cnt % cfg.ts_periodicity] &&
!(pkt->data.frame.flags & VPX_FRAME_IS_KEY)) {
rc.layer_avg_frame_size[i] += 8.0 * pkt->data.frame.sz;
rc.layer_avg_rate_mismatch[i] +=
fabs(8.0 * pkt->data.frame.sz - rc.layer_pfb[i]) /
rc.layer_pfb[i];
++rc.layer_enc_frames[i];
}
}
break;
default:
@ -525,7 +622,8 @@ int main(int argc, char **argv) {
pts += frame_duration;
}
fclose(input_ctx.file);
printf("Processed %d frames: \n", frame_cnt - 1);
printout_rate_control_summary(&rc, &cfg, frame_cnt);
if (vpx_codec_destroy(&codec))
die_codec(&codec, "Failed to destroy codec");