2 * Copyright (c) 2012 The WebM project authors. All Rights Reserved.
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
12 * This is an example demonstrating how to implement a multi-layer
13 * VP9 encoding scheme based on spatial scalability for video applications
14 * that benefit from a scalable bitstream.
25 #include "../tools_common.h"
26 #include "../video_writer.h"
28 #include "../vpx_ports/vpx_timer.h"
29 #include "vpx/svc_context.h"
30 #include "vpx/vp8cx.h"
31 #include "vpx/vpx_encoder.h"
32 #include "../vpxstats.h"
33 #define OUTPUT_RC_STATS 1
35 static const arg_def_t skip_frames_arg =
36 ARG_DEF("s", "skip-frames", 1, "input frames to skip");
37 static const arg_def_t frames_arg =
38 ARG_DEF("f", "frames", 1, "number of frames to encode");
39 static const arg_def_t threads_arg =
40 ARG_DEF("th", "threads", 1, "number of threads to use");
42 static const arg_def_t output_rc_stats_arg =
43 ARG_DEF("rcstat", "output_rc_stats", 1, "output rc stats");
45 static const arg_def_t width_arg = ARG_DEF("w", "width", 1, "source width");
46 static const arg_def_t height_arg = ARG_DEF("h", "height", 1, "source height");
47 static const arg_def_t timebase_arg =
48 ARG_DEF("t", "timebase", 1, "timebase (num/den)");
49 static const arg_def_t bitrate_arg = ARG_DEF(
50 "b", "target-bitrate", 1, "encoding bitrate, in kilobits per second");
51 static const arg_def_t spatial_layers_arg =
52 ARG_DEF("sl", "spatial-layers", 1, "number of spatial SVC layers");
53 static const arg_def_t temporal_layers_arg =
54 ARG_DEF("tl", "temporal-layers", 1, "number of temporal SVC layers");
55 static const arg_def_t temporal_layering_mode_arg =
56 ARG_DEF("tlm", "temporal-layering-mode", 1, "temporal layering scheme."
57 "VP9E_TEMPORAL_LAYERING_MODE");
58 static const arg_def_t kf_dist_arg =
59 ARG_DEF("k", "kf-dist", 1, "number of frames between keyframes");
60 static const arg_def_t scale_factors_arg =
61 ARG_DEF("r", "scale-factors", 1, "scale factors (lowest to highest layer)");
62 static const arg_def_t passes_arg =
63 ARG_DEF("p", "passes", 1, "Number of passes (1/2)");
64 static const arg_def_t pass_arg =
65 ARG_DEF(NULL, "pass", 1, "Pass to execute (1/2)");
66 static const arg_def_t fpf_name_arg =
67 ARG_DEF(NULL, "fpf", 1, "First pass statistics file name");
68 static const arg_def_t min_q_arg =
69 ARG_DEF(NULL, "min-q", 1, "Minimum quantizer");
70 static const arg_def_t max_q_arg =
71 ARG_DEF(NULL, "max-q", 1, "Maximum quantizer");
72 static const arg_def_t min_bitrate_arg =
73 ARG_DEF(NULL, "min-bitrate", 1, "Minimum bitrate");
74 static const arg_def_t max_bitrate_arg =
75 ARG_DEF(NULL, "max-bitrate", 1, "Maximum bitrate");
76 static const arg_def_t lag_in_frame_arg =
77 ARG_DEF(NULL, "lag-in-frames", 1, "Number of frame to input before "
78 "generating any outputs");
79 static const arg_def_t rc_end_usage_arg =
80 ARG_DEF(NULL, "rc-end-usage", 1, "0 - 3: VBR, CBR, CQ, Q");
81 static const arg_def_t speed_arg =
82 ARG_DEF("sp", "speed", 1, "speed configuration");
84 #if CONFIG_VP9_HIGHBITDEPTH
85 static const struct arg_enum_list bitdepth_enum[] = {
92 static const arg_def_t bitdepth_arg =
93 ARG_DEF_ENUM("d", "bit-depth", 1, "Bit depth for codec 8, 10 or 12. ",
95 #endif // CONFIG_VP9_HIGHBITDEPTH
98 static const arg_def_t *svc_args[] = {
99 &frames_arg, &width_arg, &height_arg,
100 &timebase_arg, &bitrate_arg, &skip_frames_arg, &spatial_layers_arg,
101 &kf_dist_arg, &scale_factors_arg, &passes_arg, &pass_arg,
102 &fpf_name_arg, &min_q_arg, &max_q_arg, &min_bitrate_arg,
103 &max_bitrate_arg, &temporal_layers_arg, &temporal_layering_mode_arg,
104 &lag_in_frame_arg, &threads_arg,
106 &output_rc_stats_arg,
109 #if CONFIG_VP9_HIGHBITDEPTH
113 &rc_end_usage_arg, NULL
116 static const uint32_t default_frames_to_skip = 0;
117 static const uint32_t default_frames_to_code = 60 * 60;
118 static const uint32_t default_width = 1920;
119 static const uint32_t default_height = 1080;
120 static const uint32_t default_timebase_num = 1;
121 static const uint32_t default_timebase_den = 60;
122 static const uint32_t default_bitrate = 1000;
123 static const uint32_t default_spatial_layers = 5;
124 static const uint32_t default_temporal_layers = 1;
125 static const uint32_t default_kf_dist = 100;
126 static const uint32_t default_temporal_layering_mode = 0;
127 static const uint32_t default_output_rc_stats = 0;
128 static const int32_t default_speed = -1; // -1 means use library default.
129 static const uint32_t default_threads = 0; // zero means use library default.
132 const char *input_filename;
133 const char *output_filename;
134 uint32_t frames_to_code;
135 uint32_t frames_to_skip;
136 struct VpxInputContext input_ctx;
142 static const char *exec_name;
144 void usage_exit(void) {
145 fprintf(stderr, "Usage: %s <options> input_filename output_filename\n",
147 fprintf(stderr, "Options:\n");
148 arg_show_usage(stderr, svc_args);
152 static void parse_command_line(int argc, const char **argv_,
153 AppInput *app_input, SvcContext *svc_ctx,
154 vpx_codec_enc_cfg_t *enc_cfg) {
155 struct arg arg = {0};
162 const char *fpf_file_name = NULL;
163 unsigned int min_bitrate = 0;
164 unsigned int max_bitrate = 0;
165 char string_options[1024] = {0};
167 // initialize SvcContext with parameters that will be passed to vpx_svc_init
168 svc_ctx->log_level = SVC_LOG_DEBUG;
169 svc_ctx->spatial_layers = default_spatial_layers;
170 svc_ctx->temporal_layers = default_temporal_layers;
171 svc_ctx->temporal_layering_mode = default_temporal_layering_mode;
173 svc_ctx->output_rc_stat = default_output_rc_stats;
175 svc_ctx->speed = default_speed;
176 svc_ctx->threads = default_threads;
178 // start with default encoder configuration
179 res = vpx_codec_enc_config_default(vpx_codec_vp9_cx(), enc_cfg, 0);
181 die("Failed to get config: %s\n", vpx_codec_err_to_string(res));
183 // update enc_cfg with app default values
184 enc_cfg->g_w = default_width;
185 enc_cfg->g_h = default_height;
186 enc_cfg->g_timebase.num = default_timebase_num;
187 enc_cfg->g_timebase.den = default_timebase_den;
188 enc_cfg->rc_target_bitrate = default_bitrate;
189 enc_cfg->kf_min_dist = default_kf_dist;
190 enc_cfg->kf_max_dist = default_kf_dist;
191 enc_cfg->rc_end_usage = VPX_CQ;
193 // initialize AppInput with default values
194 app_input->frames_to_code = default_frames_to_code;
195 app_input->frames_to_skip = default_frames_to_skip;
197 // process command line options
198 argv = argv_dup(argc - 1, argv_ + 1);
199 for (argi = argj = argv; (*argj = *argi); argi += arg.argv_step) {
202 if (arg_match(&arg, &frames_arg, argi)) {
203 app_input->frames_to_code = arg_parse_uint(&arg);
204 } else if (arg_match(&arg, &width_arg, argi)) {
205 enc_cfg->g_w = arg_parse_uint(&arg);
206 } else if (arg_match(&arg, &height_arg, argi)) {
207 enc_cfg->g_h = arg_parse_uint(&arg);
208 } else if (arg_match(&arg, &timebase_arg, argi)) {
209 enc_cfg->g_timebase = arg_parse_rational(&arg);
210 } else if (arg_match(&arg, &bitrate_arg, argi)) {
211 enc_cfg->rc_target_bitrate = arg_parse_uint(&arg);
212 } else if (arg_match(&arg, &skip_frames_arg, argi)) {
213 app_input->frames_to_skip = arg_parse_uint(&arg);
214 } else if (arg_match(&arg, &spatial_layers_arg, argi)) {
215 svc_ctx->spatial_layers = arg_parse_uint(&arg);
216 } else if (arg_match(&arg, &temporal_layers_arg, argi)) {
217 svc_ctx->temporal_layers = arg_parse_uint(&arg);
219 } else if (arg_match(&arg, &output_rc_stats_arg, argi)) {
220 svc_ctx->output_rc_stat = arg_parse_uint(&arg);
222 } else if (arg_match(&arg, &speed_arg, argi)) {
223 svc_ctx->speed = arg_parse_uint(&arg);
224 } else if (arg_match(&arg, &threads_arg, argi)) {
225 svc_ctx->threads = arg_parse_uint(&arg);
226 } else if (arg_match(&arg, &temporal_layering_mode_arg, argi)) {
227 svc_ctx->temporal_layering_mode =
228 enc_cfg->temporal_layering_mode = arg_parse_int(&arg);
229 if (svc_ctx->temporal_layering_mode) {
230 enc_cfg->g_error_resilient = 1;
232 } else if (arg_match(&arg, &kf_dist_arg, argi)) {
233 enc_cfg->kf_min_dist = arg_parse_uint(&arg);
234 enc_cfg->kf_max_dist = enc_cfg->kf_min_dist;
235 } else if (arg_match(&arg, &scale_factors_arg, argi)) {
236 snprintf(string_options, sizeof(string_options), "%s scale-factors=%s",
237 string_options, arg.val);
238 } else if (arg_match(&arg, &passes_arg, argi)) {
239 passes = arg_parse_uint(&arg);
240 if (passes < 1 || passes > 2) {
241 die("Error: Invalid number of passes (%d)\n", passes);
243 } else if (arg_match(&arg, &pass_arg, argi)) {
244 pass = arg_parse_uint(&arg);
245 if (pass < 1 || pass > 2) {
246 die("Error: Invalid pass selected (%d)\n", pass);
248 } else if (arg_match(&arg, &fpf_name_arg, argi)) {
249 fpf_file_name = arg.val;
250 } else if (arg_match(&arg, &min_q_arg, argi)) {
251 snprintf(string_options, sizeof(string_options), "%s min-quantizers=%s",
252 string_options, arg.val);
253 } else if (arg_match(&arg, &max_q_arg, argi)) {
254 snprintf(string_options, sizeof(string_options), "%s max-quantizers=%s",
255 string_options, arg.val);
256 } else if (arg_match(&arg, &min_bitrate_arg, argi)) {
257 min_bitrate = arg_parse_uint(&arg);
258 } else if (arg_match(&arg, &max_bitrate_arg, argi)) {
259 max_bitrate = arg_parse_uint(&arg);
260 } else if (arg_match(&arg, &lag_in_frame_arg, argi)) {
261 enc_cfg->g_lag_in_frames = arg_parse_uint(&arg);
262 } else if (arg_match(&arg, &rc_end_usage_arg, argi)) {
263 enc_cfg->rc_end_usage = arg_parse_uint(&arg);
264 #if CONFIG_VP9_HIGHBITDEPTH
265 } else if (arg_match(&arg, &bitdepth_arg, argi)) {
266 enc_cfg->g_bit_depth = arg_parse_enum_or_int(&arg);
267 switch (enc_cfg->g_bit_depth) {
269 enc_cfg->g_input_bit_depth = 8;
270 enc_cfg->g_profile = 0;
273 enc_cfg->g_input_bit_depth = 10;
274 enc_cfg->g_profile = 2;
277 enc_cfg->g_input_bit_depth = 12;
278 enc_cfg->g_profile = 2;
281 die("Error: Invalid bit depth selected (%d)\n", enc_cfg->g_bit_depth);
284 #endif // CONFIG_VP9_HIGHBITDEPTH
290 // There will be a space in front of the string options
291 if (strlen(string_options) > 0)
292 vpx_svc_set_options(svc_ctx, string_options + 1);
294 if (passes == 0 || passes == 1) {
296 fprintf(stderr, "pass is ignored since there's only one pass\n");
298 enc_cfg->g_pass = VPX_RC_ONE_PASS;
301 die("pass must be specified when passes is 2\n");
304 if (fpf_file_name == NULL) {
305 die("fpf must be specified when passes is 2\n");
309 enc_cfg->g_pass = VPX_RC_FIRST_PASS;
310 if (!stats_open_file(&app_input->rc_stats, fpf_file_name, 0)) {
311 fatal("Failed to open statistics store");
314 enc_cfg->g_pass = VPX_RC_LAST_PASS;
315 if (!stats_open_file(&app_input->rc_stats, fpf_file_name, 1)) {
316 fatal("Failed to open statistics store");
318 enc_cfg->rc_twopass_stats_in = stats_get(&app_input->rc_stats);
320 app_input->passes = passes;
321 app_input->pass = pass;
324 if (enc_cfg->rc_target_bitrate > 0) {
325 if (min_bitrate > 0) {
326 enc_cfg->rc_2pass_vbr_minsection_pct =
327 min_bitrate * 100 / enc_cfg->rc_target_bitrate;
329 if (max_bitrate > 0) {
330 enc_cfg->rc_2pass_vbr_maxsection_pct =
331 max_bitrate * 100 / enc_cfg->rc_target_bitrate;
335 // Check for unrecognized options
336 for (argi = argv; *argi; ++argi)
337 if (argi[0][0] == '-' && strlen(argi[0]) > 1)
338 die("Error: Unrecognized option %s\n", *argi);
340 if (argv[0] == NULL || argv[1] == 0) {
343 app_input->input_filename = argv[0];
344 app_input->output_filename = argv[1];
347 if (enc_cfg->g_w < 16 || enc_cfg->g_w % 2 || enc_cfg->g_h < 16 ||
349 die("Invalid resolution: %d x %d\n", enc_cfg->g_w, enc_cfg->g_h);
352 "Codec %s\nframes: %d, skip: %d\n"
354 "width %d, height: %d,\n"
355 "num: %d, den: %d, bitrate: %d,\n"
357 vpx_codec_iface_name(vpx_codec_vp9_cx()), app_input->frames_to_code,
358 app_input->frames_to_skip,
359 svc_ctx->spatial_layers, enc_cfg->g_w, enc_cfg->g_h,
360 enc_cfg->g_timebase.num, enc_cfg->g_timebase.den,
361 enc_cfg->rc_target_bitrate, enc_cfg->kf_max_dist);
365 // For rate control encoding stats.
366 struct RateControlStats {
367 // Number of input frames per layer.
368 int layer_input_frames[VPX_MAX_LAYERS];
369 // Total (cumulative) number of encoded frames per layer.
370 int layer_tot_enc_frames[VPX_MAX_LAYERS];
371 // Number of encoded non-key frames per layer.
372 int layer_enc_frames[VPX_MAX_LAYERS];
373 // Framerate per layer (cumulative).
374 double layer_framerate[VPX_MAX_LAYERS];
375 // Target average frame size per layer (per-frame-bandwidth per layer).
376 double layer_pfb[VPX_MAX_LAYERS];
377 // Actual average frame size per layer.
378 double layer_avg_frame_size[VPX_MAX_LAYERS];
379 // Average rate mismatch per layer (|target - actual| / target).
380 double layer_avg_rate_mismatch[VPX_MAX_LAYERS];
381 // Actual encoding bitrate per layer (cumulative).
382 double layer_encoding_bitrate[VPX_MAX_LAYERS];
383 // Average of the short-time encoder actual bitrate.
384 // TODO(marpan): Should we add these short-time stats for each layer?
385 double avg_st_encoding_bitrate;
386 // Variance of the short-time encoder actual bitrate.
387 double variance_st_encoding_bitrate;
388 // Window (number of frames) for computing short-time encoding bitrate.
390 // Number of window measurements.
394 // Note: these rate control stats assume only 1 key frame in the
395 // sequence (i.e., first frame only).
396 static void set_rate_control_stats(struct RateControlStats *rc,
397 vpx_codec_enc_cfg_t *cfg) {
399 // Set the layer (cumulative) framerate and the target layer (non-cumulative)
400 // per-frame-bandwidth, for the rate control encoding stats below.
401 const double framerate = cfg->g_timebase.den / cfg->g_timebase.num;
403 for (sl = 0; sl < cfg->ss_number_layers; ++sl) {
404 for (tl = 0; tl < cfg->ts_number_layers; ++tl) {
405 const int layer = sl * cfg->ts_number_layers + tl;
406 const int tlayer0 = sl * cfg->ts_number_layers;
407 rc->layer_framerate[layer] =
408 framerate / cfg->ts_rate_decimator[tl];
410 rc->layer_pfb[layer] = 1000.0 *
411 (cfg->layer_target_bitrate[layer] -
412 cfg->layer_target_bitrate[layer - 1]) /
413 (rc->layer_framerate[layer] -
414 rc->layer_framerate[layer - 1]);
416 rc->layer_pfb[tlayer0] = 1000.0 *
417 cfg->layer_target_bitrate[tlayer0] /
418 rc->layer_framerate[tlayer0];
420 rc->layer_input_frames[layer] = 0;
421 rc->layer_enc_frames[layer] = 0;
422 rc->layer_tot_enc_frames[layer] = 0;
423 rc->layer_encoding_bitrate[layer] = 0.0;
424 rc->layer_avg_frame_size[layer] = 0.0;
425 rc->layer_avg_rate_mismatch[layer] = 0.0;
428 rc->window_count = 0;
429 rc->window_size = 15;
430 rc->avg_st_encoding_bitrate = 0.0;
431 rc->variance_st_encoding_bitrate = 0.0;
434 static void printout_rate_control_summary(struct RateControlStats *rc,
435 vpx_codec_enc_cfg_t *cfg,
438 int tot_num_frames = 0;
439 double perc_fluctuation = 0.0;
440 printf("Total number of processed frames: %d\n\n", frame_cnt - 1);
441 printf("Rate control layer stats for sl%d tl%d layer(s):\n\n",
442 cfg->ss_number_layers, cfg->ts_number_layers);
443 for (sl = 0; sl < cfg->ss_number_layers; ++sl) {
444 for (tl = 0; tl < cfg->ts_number_layers; ++tl) {
445 const int layer = sl * cfg->ts_number_layers + tl;
446 const int num_dropped = (tl > 0) ?
447 (rc->layer_input_frames[layer] - rc->layer_enc_frames[layer]) :
448 (rc->layer_input_frames[layer] - rc->layer_enc_frames[layer] - 1);
450 tot_num_frames += rc->layer_input_frames[layer];
451 rc->layer_encoding_bitrate[layer] = 0.001 * rc->layer_framerate[layer] *
452 rc->layer_encoding_bitrate[layer] / tot_num_frames;
453 rc->layer_avg_frame_size[layer] = rc->layer_avg_frame_size[layer] /
454 rc->layer_enc_frames[layer];
455 rc->layer_avg_rate_mismatch[layer] =
456 100.0 * rc->layer_avg_rate_mismatch[layer] /
457 rc->layer_enc_frames[layer];
458 printf("For layer#: sl%d tl%d \n", sl, tl);
459 printf("Bitrate (target vs actual): %d %f.0 kbps\n",
460 cfg->layer_target_bitrate[layer],
461 rc->layer_encoding_bitrate[layer]);
462 printf("Average frame size (target vs actual): %f %f bits\n",
463 rc->layer_pfb[layer], rc->layer_avg_frame_size[layer]);
464 printf("Average rate_mismatch: %f\n",
465 rc->layer_avg_rate_mismatch[layer]);
466 printf("Number of input frames, encoded (non-key) frames, "
467 "and percent dropped frames: %d %d %f.0 \n",
468 rc->layer_input_frames[layer], rc->layer_enc_frames[layer],
469 100.0 * num_dropped / rc->layer_input_frames[layer]);
473 rc->avg_st_encoding_bitrate = rc->avg_st_encoding_bitrate / rc->window_count;
474 rc->variance_st_encoding_bitrate =
475 rc->variance_st_encoding_bitrate / rc->window_count -
476 (rc->avg_st_encoding_bitrate * rc->avg_st_encoding_bitrate);
477 perc_fluctuation = 100.0 * sqrt(rc->variance_st_encoding_bitrate) /
478 rc->avg_st_encoding_bitrate;
479 printf("Short-time stats, for window of %d frames: \n", rc->window_size);
480 printf("Average, rms-variance, and percent-fluct: %f %f %f \n",
481 rc->avg_st_encoding_bitrate,
482 sqrt(rc->variance_st_encoding_bitrate),
484 if (frame_cnt != tot_num_frames)
485 die("Error: Number of input frames not equal to output encoded frames != "
486 "%d tot_num_frames = %d\n", frame_cnt, tot_num_frames);
489 vpx_codec_err_t parse_superframe_index(const uint8_t *data,
491 uint32_t sizes[8], int *count) {
492 // A chunk ending with a byte matching 0xc0 is an invalid chunk unless
493 // it is a super frame index. If the last byte of real video compression
494 // data is 0xc0 the encoder must add a 0 byte. If we have the marker but
495 // not the associated matching marker byte at the front of the index we have
496 // an invalid bitstream and need to return an error.
500 marker = *(data + data_sz - 1);
504 if ((marker & 0xe0) == 0xc0) {
505 const uint32_t frames = (marker & 0x7) + 1;
506 const uint32_t mag = ((marker >> 3) & 0x3) + 1;
507 const size_t index_sz = 2 + mag * frames;
509 // This chunk is marked as having a superframe index but doesn't have
510 // enough data for it, thus it's an invalid superframe index.
511 if (data_sz < index_sz)
512 return VPX_CODEC_CORRUPT_FRAME;
515 const uint8_t marker2 = *(data + data_sz - index_sz);
517 // This chunk is marked as having a superframe index but doesn't have
518 // the matching marker byte at the front of the index therefore it's an
520 if (marker != marker2)
521 return VPX_CODEC_CORRUPT_FRAME;
525 // Found a valid superframe index.
527 const uint8_t *x = &data[data_sz - index_sz + 1];
529 for (i = 0; i < frames; ++i) {
530 uint32_t this_sz = 0;
532 for (j = 0; j < mag; ++j)
533 this_sz |= (*x++) << (j * 8);
543 int main(int argc, const char **argv) {
544 AppInput app_input = {0};
545 VpxVideoWriter *writer = NULL;
546 VpxVideoInfo info = {0};
547 vpx_codec_ctx_t codec;
548 vpx_codec_enc_cfg_t enc_cfg;
551 uint32_t frame_cnt = 0;
554 int pts = 0; /* PTS starts at 0 */
555 int frame_duration = 1; /* 1 timebase tick per frame */
557 int end_of_stream = 0;
558 int frames_received = 0;
560 VpxVideoWriter *outfile[VPX_TS_MAX_LAYERS] = {NULL};
561 struct RateControlStats rc;
562 vpx_svc_layer_id_t layer_id;
564 double sum_bitrate = 0.0;
565 double sum_bitrate2 = 0.0;
566 double framerate = 30.0;
568 struct vpx_usec_timer timer;
570 memset(&svc_ctx, 0, sizeof(svc_ctx));
571 svc_ctx.log_print = 1;
573 parse_command_line(argc, argv, &app_input, &svc_ctx, &enc_cfg);
575 // Allocate image buffer
576 #if CONFIG_VP9_HIGHBITDEPTH
577 if (!vpx_img_alloc(&raw, enc_cfg.g_input_bit_depth == 8 ?
578 VPX_IMG_FMT_I420 : VPX_IMG_FMT_I42016,
579 enc_cfg.g_w, enc_cfg.g_h, 32)) {
580 die("Failed to allocate image %dx%d\n", enc_cfg.g_w, enc_cfg.g_h);
583 if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, enc_cfg.g_w, enc_cfg.g_h, 32)) {
584 die("Failed to allocate image %dx%d\n", enc_cfg.g_w, enc_cfg.g_h);
586 #endif // CONFIG_VP9_HIGHBITDEPTH
588 if (!(infile = fopen(app_input.input_filename, "rb")))
589 die("Failed to open %s for reading\n", app_input.input_filename);
592 if (vpx_svc_init(&svc_ctx, &codec, vpx_codec_vp9_cx(), &enc_cfg) !=
594 die("Failed to initialize encoder\n");
597 if (svc_ctx.output_rc_stat) {
598 set_rate_control_stats(&rc, &enc_cfg);
599 framerate = enc_cfg.g_timebase.den / enc_cfg.g_timebase.num;
603 info.codec_fourcc = VP9_FOURCC;
604 info.time_base.numerator = enc_cfg.g_timebase.num;
605 info.time_base.denominator = enc_cfg.g_timebase.den;
607 if (!(app_input.passes == 2 && app_input.pass == 1)) {
608 // We don't save the bitstream for the 1st pass on two pass rate control
609 writer = vpx_video_writer_open(app_input.output_filename, kContainerIVF,
612 die("Failed to open %s for writing\n", app_input.output_filename);
615 // For now, just write temporal layer streams.
616 // TODO(wonkap): do spatial by re-writing superframe.
617 if (svc_ctx.output_rc_stat) {
618 for (tl = 0; tl < enc_cfg.ts_number_layers; ++tl) {
619 char file_name[PATH_MAX];
621 snprintf(file_name, sizeof(file_name), "%s_t%d.ivf",
622 app_input.output_filename, tl);
623 outfile[tl] = vpx_video_writer_open(file_name, kContainerIVF, &info);
625 die("Failed to open %s for writing", file_name);
630 // skip initial frames
631 for (i = 0; i < app_input.frames_to_skip; ++i)
632 vpx_img_read(&raw, infile);
634 if (svc_ctx.speed != -1)
635 vpx_codec_control(&codec, VP8E_SET_CPUUSED, svc_ctx.speed);
637 vpx_codec_control(&codec, VP9E_SET_TILE_COLUMNS, (svc_ctx.threads >> 1));
638 if (svc_ctx.speed >= 5)
639 vpx_codec_control(&codec, VP9E_SET_AQ_MODE, 3);
643 while (!end_of_stream) {
644 vpx_codec_iter_t iter = NULL;
645 const vpx_codec_cx_pkt_t *cx_pkt;
646 if (frame_cnt >= app_input.frames_to_code || !vpx_img_read(&raw, infile)) {
647 // We need one extra vpx_svc_encode call at end of stream to flush
648 // encoder and get remaining data
652 vpx_usec_timer_start(&timer);
653 res = vpx_svc_encode(&svc_ctx, &codec, (end_of_stream ? NULL : &raw),
654 pts, frame_duration, svc_ctx.speed >= 5 ?
655 VPX_DL_REALTIME : VPX_DL_GOOD_QUALITY);
656 vpx_usec_timer_mark(&timer);
657 cx_time += vpx_usec_timer_elapsed(&timer);
659 printf("%s", vpx_svc_get_message(&svc_ctx));
660 if (res != VPX_CODEC_OK) {
661 die_codec(&codec, "Failed to encode frame");
664 while ((cx_pkt = vpx_codec_get_cx_data(&codec, &iter)) != NULL) {
665 switch (cx_pkt->kind) {
666 case VPX_CODEC_CX_FRAME_PKT: {
667 if (cx_pkt->data.frame.sz > 0) {
672 vpx_video_writer_write_frame(writer,
673 cx_pkt->data.frame.buf,
674 cx_pkt->data.frame.sz,
675 cx_pkt->data.frame.pts);
677 // TODO(marpan/wonkap): Put this (to line728) in separate function.
678 if (svc_ctx.output_rc_stat) {
679 vpx_codec_control(&codec, VP9E_GET_SVC_LAYER_ID, &layer_id);
680 parse_superframe_index(cx_pkt->data.frame.buf,
681 cx_pkt->data.frame.sz, sizes, &count);
682 for (sl = 0; sl < enc_cfg.ss_number_layers; ++sl) {
683 ++rc.layer_input_frames[sl * enc_cfg.ts_number_layers +
684 layer_id.temporal_layer_id];
686 for (tl = layer_id.temporal_layer_id;
687 tl < enc_cfg.ts_number_layers; ++tl) {
688 vpx_video_writer_write_frame(outfile[tl],
689 cx_pkt->data.frame.buf,
690 cx_pkt->data.frame.sz,
691 cx_pkt->data.frame.pts);
694 for (sl = 0; sl < enc_cfg.ss_number_layers; ++sl) {
695 for (tl = layer_id.temporal_layer_id;
696 tl < enc_cfg.ts_number_layers; ++tl) {
697 const int layer = sl * enc_cfg.ts_number_layers + tl;
698 ++rc.layer_tot_enc_frames[layer];
699 rc.layer_encoding_bitrate[layer] += 8.0 * sizes[sl];
700 // Keep count of rate control stats per layer, for non-key
702 if (tl == layer_id.temporal_layer_id &&
703 !(cx_pkt->data.frame.flags & VPX_FRAME_IS_KEY)) {
704 rc.layer_avg_frame_size[layer] += 8.0 * sizes[sl];
705 rc.layer_avg_rate_mismatch[layer] +=
706 fabs(8.0 * sizes[sl] - rc.layer_pfb[layer]) /
708 ++rc.layer_enc_frames[layer];
713 // Update for short-time encoding bitrate states, for moving
714 // window of size rc->window, shifted by rc->window / 2.
715 // Ignore first window segment, due to key frame.
716 if (frame_cnt > rc.window_size) {
717 tl = layer_id.temporal_layer_id;
718 for (sl = 0; sl < enc_cfg.ss_number_layers; ++sl) {
719 sum_bitrate += 0.001 * 8.0 * sizes[sl] * framerate;
721 if (frame_cnt % rc.window_size == 0) {
722 rc.window_count += 1;
723 rc.avg_st_encoding_bitrate += sum_bitrate / rc.window_size;
724 rc.variance_st_encoding_bitrate +=
725 (sum_bitrate / rc.window_size) *
726 (sum_bitrate / rc.window_size);
731 // Second shifted window.
732 if (frame_cnt > rc.window_size + rc.window_size / 2) {
733 tl = layer_id.temporal_layer_id;
734 for (sl = 0; sl < enc_cfg.ss_number_layers; ++sl) {
735 sum_bitrate2 += 0.001 * 8.0 * sizes[sl] * framerate;
738 if (frame_cnt > 2 * rc.window_size &&
739 frame_cnt % rc.window_size == 0) {
740 rc.window_count += 1;
741 rc.avg_st_encoding_bitrate += sum_bitrate2 / rc.window_size;
742 rc.variance_st_encoding_bitrate +=
743 (sum_bitrate2 / rc.window_size) *
744 (sum_bitrate2 / rc.window_size);
752 printf("SVC frame: %d, kf: %d, size: %d, pts: %d\n", frames_received,
753 !!(cx_pkt->data.frame.flags & VPX_FRAME_IS_KEY),
754 (int)cx_pkt->data.frame.sz, (int)cx_pkt->data.frame.pts);
758 case VPX_CODEC_STATS_PKT: {
759 stats_write(&app_input.rc_stats,
760 cx_pkt->data.twopass_stats.buf,
761 cx_pkt->data.twopass_stats.sz);
770 if (!end_of_stream) {
772 pts += frame_duration;
775 printf("Processed %d frames\n", frame_cnt);
778 if (svc_ctx.output_rc_stat) {
779 printout_rate_control_summary(&rc, &enc_cfg, frame_cnt);
783 if (vpx_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
784 if (app_input.passes == 2)
785 stats_close(&app_input.rc_stats, 1);
787 vpx_video_writer_close(writer);
790 if (svc_ctx.output_rc_stat) {
791 for (tl = 0; tl < enc_cfg.ts_number_layers; ++tl) {
792 vpx_video_writer_close(outfile[tl]);
796 printf("Frame cnt and encoding time/FPS stats for encoding: %d %f %f \n",
798 1000 * (float)cx_time / (double)(frame_cnt * 1000000),
799 1000000 * (double)frame_cnt / (double)cx_time);
801 // display average size, psnr
802 printf("%s", vpx_svc_dump_statistics(&svc_ctx));
803 vpx_svc_release(&svc_ctx);