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-rw-r--r--libvpx/examples/vp9_spatial_scalable_encoder.c361
1 files changed, 361 insertions, 0 deletions
diff --git a/libvpx/examples/vp9_spatial_scalable_encoder.c b/libvpx/examples/vp9_spatial_scalable_encoder.c
new file mode 100644
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+++ b/libvpx/examples/vp9_spatial_scalable_encoder.c
@@ -0,0 +1,361 @@
+/*
+ * Copyright (c) 2012 The WebM project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+/*
+ * This is an example demonstrating how to implement a multi-layer
+ * VP9 encoding scheme based on spatial scalability for video applications
+ * that benefit from a scalable bitstream.
+ */
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "./args.h"
+#include "./tools_common.h"
+#include "./video_writer.h"
+
+#include "vpx/svc_context.h"
+#include "vpx/vp8cx.h"
+#include "vpx/vpx_encoder.h"
+#include "./vpxstats.h"
+
+static const struct arg_enum_list encoding_mode_enum[] = {
+ {"i", INTER_LAYER_PREDICTION_I},
+ {"alt-ip", ALT_INTER_LAYER_PREDICTION_IP},
+ {"ip", INTER_LAYER_PREDICTION_IP},
+ {"gf", USE_GOLDEN_FRAME},
+ {NULL, 0}
+};
+
+static const arg_def_t encoding_mode_arg = ARG_DEF_ENUM(
+ "m", "encoding-mode", 1, "Encoding mode algorithm", encoding_mode_enum);
+static const arg_def_t skip_frames_arg =
+ ARG_DEF("s", "skip-frames", 1, "input frames to skip");
+static const arg_def_t frames_arg =
+ ARG_DEF("f", "frames", 1, "number of frames to encode");
+static const arg_def_t width_arg = ARG_DEF("w", "width", 1, "source width");
+static const arg_def_t height_arg = ARG_DEF("h", "height", 1, "source height");
+static const arg_def_t timebase_arg =
+ ARG_DEF("t", "timebase", 1, "timebase (num/den)");
+static const arg_def_t bitrate_arg = ARG_DEF(
+ "b", "target-bitrate", 1, "encoding bitrate, in kilobits per second");
+static const arg_def_t layers_arg =
+ ARG_DEF("l", "layers", 1, "number of SVC layers");
+static const arg_def_t kf_dist_arg =
+ ARG_DEF("k", "kf-dist", 1, "number of frames between keyframes");
+static const arg_def_t scale_factors_arg =
+ ARG_DEF("r", "scale-factors", 1, "scale factors (lowest to highest layer)");
+static const arg_def_t quantizers_arg =
+ ARG_DEF("q", "quantizers", 1, "quantizers for non key frames, also will "
+ "be applied to key frames if -qn is not specified (lowest to "
+ "highest layer)");
+static const arg_def_t quantizers_keyframe_arg =
+ ARG_DEF("qn", "quantizers-keyframe", 1, "quantizers for key frames (lowest "
+ "to highest layer)");
+static const arg_def_t passes_arg =
+ ARG_DEF("p", "passes", 1, "Number of passes (1/2)");
+static const arg_def_t pass_arg =
+ ARG_DEF(NULL, "pass", 1, "Pass to execute (1/2)");
+static const arg_def_t fpf_name_arg =
+ ARG_DEF(NULL, "fpf", 1, "First pass statistics file name");
+
+static const arg_def_t *svc_args[] = {
+ &encoding_mode_arg, &frames_arg, &width_arg, &height_arg,
+ &timebase_arg, &bitrate_arg, &skip_frames_arg, &layers_arg,
+ &kf_dist_arg, &scale_factors_arg, &quantizers_arg,
+ &quantizers_keyframe_arg, &passes_arg, &pass_arg,
+ &fpf_name_arg, NULL
+};
+
+static const SVC_ENCODING_MODE default_encoding_mode =
+ INTER_LAYER_PREDICTION_IP;
+static const uint32_t default_frames_to_skip = 0;
+static const uint32_t default_frames_to_code = 60 * 60;
+static const uint32_t default_width = 1920;
+static const uint32_t default_height = 1080;
+static const uint32_t default_timebase_num = 1;
+static const uint32_t default_timebase_den = 60;
+static const uint32_t default_bitrate = 1000;
+static const uint32_t default_spatial_layers = 5;
+static const uint32_t default_kf_dist = 100;
+
+typedef struct {
+ const char *input_filename;
+ const char *output_filename;
+ uint32_t frames_to_code;
+ uint32_t frames_to_skip;
+ struct VpxInputContext input_ctx;
+ stats_io_t rc_stats;
+ int passes;
+ int pass;
+} AppInput;
+
+static const char *exec_name;
+
+void usage_exit() {
+ fprintf(stderr, "Usage: %s <options> input_filename output_filename\n",
+ exec_name);
+ fprintf(stderr, "Options:\n");
+ arg_show_usage(stderr, svc_args);
+ exit(EXIT_FAILURE);
+}
+
+static void parse_command_line(int argc, const char **argv_,
+ AppInput *app_input, SvcContext *svc_ctx,
+ vpx_codec_enc_cfg_t *enc_cfg) {
+ struct arg arg = {0};
+ char **argv = NULL;
+ char **argi = NULL;
+ char **argj = NULL;
+ vpx_codec_err_t res;
+ int passes = 0;
+ int pass = 0;
+ const char *fpf_file_name = NULL;
+
+ // initialize SvcContext with parameters that will be passed to vpx_svc_init
+ svc_ctx->log_level = SVC_LOG_DEBUG;
+ svc_ctx->spatial_layers = default_spatial_layers;
+ svc_ctx->encoding_mode = default_encoding_mode;
+
+ // start with default encoder configuration
+ res = vpx_codec_enc_config_default(vpx_codec_vp9_cx(), enc_cfg, 0);
+ if (res) {
+ die("Failed to get config: %s\n", vpx_codec_err_to_string(res));
+ }
+ // update enc_cfg with app default values
+ enc_cfg->g_w = default_width;
+ enc_cfg->g_h = default_height;
+ enc_cfg->g_timebase.num = default_timebase_num;
+ enc_cfg->g_timebase.den = default_timebase_den;
+ enc_cfg->rc_target_bitrate = default_bitrate;
+ enc_cfg->kf_min_dist = default_kf_dist;
+ enc_cfg->kf_max_dist = default_kf_dist;
+
+ // initialize AppInput with default values
+ app_input->frames_to_code = default_frames_to_code;
+ app_input->frames_to_skip = default_frames_to_skip;
+
+ // process command line options
+ argv = argv_dup(argc - 1, argv_ + 1);
+ for (argi = argj = argv; (*argj = *argi); argi += arg.argv_step) {
+ arg.argv_step = 1;
+
+ if (arg_match(&arg, &encoding_mode_arg, argi)) {
+ svc_ctx->encoding_mode = arg_parse_enum_or_int(&arg);
+ } else if (arg_match(&arg, &frames_arg, argi)) {
+ app_input->frames_to_code = arg_parse_uint(&arg);
+ } else if (arg_match(&arg, &width_arg, argi)) {
+ enc_cfg->g_w = arg_parse_uint(&arg);
+ } else if (arg_match(&arg, &height_arg, argi)) {
+ enc_cfg->g_h = arg_parse_uint(&arg);
+ } else if (arg_match(&arg, &timebase_arg, argi)) {
+ enc_cfg->g_timebase = arg_parse_rational(&arg);
+ } else if (arg_match(&arg, &bitrate_arg, argi)) {
+ enc_cfg->rc_target_bitrate = arg_parse_uint(&arg);
+ } else if (arg_match(&arg, &skip_frames_arg, argi)) {
+ app_input->frames_to_skip = arg_parse_uint(&arg);
+ } else if (arg_match(&arg, &layers_arg, argi)) {
+ svc_ctx->spatial_layers = arg_parse_uint(&arg);
+ } else if (arg_match(&arg, &kf_dist_arg, argi)) {
+ enc_cfg->kf_min_dist = arg_parse_uint(&arg);
+ enc_cfg->kf_max_dist = enc_cfg->kf_min_dist;
+ } else if (arg_match(&arg, &scale_factors_arg, argi)) {
+ vpx_svc_set_scale_factors(svc_ctx, arg.val);
+ } else if (arg_match(&arg, &quantizers_arg, argi)) {
+ vpx_svc_set_quantizers(svc_ctx, arg.val, 0);
+ } else if (arg_match(&arg, &quantizers_keyframe_arg, argi)) {
+ vpx_svc_set_quantizers(svc_ctx, arg.val, 1);
+ } else if (arg_match(&arg, &passes_arg, argi)) {
+ passes = arg_parse_uint(&arg);
+ if (passes < 1 || passes > 2) {
+ die("Error: Invalid number of passes (%d)\n", passes);
+ }
+ } else if (arg_match(&arg, &pass_arg, argi)) {
+ pass = arg_parse_uint(&arg);
+ if (pass < 1 || pass > 2) {
+ die("Error: Invalid pass selected (%d)\n", pass);
+ }
+ } else if (arg_match(&arg, &fpf_name_arg, argi)) {
+ fpf_file_name = arg.val;
+ } else {
+ ++argj;
+ }
+ }
+
+ if (passes == 0 || passes == 1) {
+ if (pass) {
+ fprintf(stderr, "pass is ignored since there's only one pass\n");
+ }
+ enc_cfg->g_pass = VPX_RC_ONE_PASS;
+ } else {
+ if (pass == 0) {
+ die("pass must be specified when passes is 2\n");
+ }
+
+ if (fpf_file_name == NULL) {
+ die("fpf must be specified when passes is 2\n");
+ }
+
+ if (pass == 1) {
+ enc_cfg->g_pass = VPX_RC_FIRST_PASS;
+ if (!stats_open_file(&app_input->rc_stats, fpf_file_name, 0)) {
+ fatal("Failed to open statistics store");
+ }
+ } else {
+ enc_cfg->g_pass = VPX_RC_LAST_PASS;
+ if (!stats_open_file(&app_input->rc_stats, fpf_file_name, 1)) {
+ fatal("Failed to open statistics store");
+ }
+ enc_cfg->rc_twopass_stats_in = stats_get(&app_input->rc_stats);
+ }
+ app_input->passes = passes;
+ app_input->pass = pass;
+ }
+
+ // Check for unrecognized options
+ for (argi = argv; *argi; ++argi)
+ if (argi[0][0] == '-' && strlen(argi[0]) > 1)
+ die("Error: Unrecognized option %s\n", *argi);
+
+ if (argv[0] == NULL || argv[1] == 0) {
+ usage_exit();
+ }
+ app_input->input_filename = argv[0];
+ app_input->output_filename = argv[1];
+ free(argv);
+
+ if (enc_cfg->g_w < 16 || enc_cfg->g_w % 2 || enc_cfg->g_h < 16 ||
+ enc_cfg->g_h % 2)
+ die("Invalid resolution: %d x %d\n", enc_cfg->g_w, enc_cfg->g_h);
+
+ printf(
+ "Codec %s\nframes: %d, skip: %d\n"
+ "mode: %d, layers: %d\n"
+ "width %d, height: %d,\n"
+ "num: %d, den: %d, bitrate: %d,\n"
+ "gop size: %d\n",
+ vpx_codec_iface_name(vpx_codec_vp9_cx()), app_input->frames_to_code,
+ app_input->frames_to_skip, svc_ctx->encoding_mode,
+ svc_ctx->spatial_layers, enc_cfg->g_w, enc_cfg->g_h,
+ enc_cfg->g_timebase.num, enc_cfg->g_timebase.den,
+ enc_cfg->rc_target_bitrate, enc_cfg->kf_max_dist);
+}
+
+int main(int argc, const char **argv) {
+ AppInput app_input = {0};
+ VpxVideoWriter *writer = NULL;
+ VpxVideoInfo info = {0};
+ vpx_codec_ctx_t codec;
+ vpx_codec_enc_cfg_t enc_cfg;
+ SvcContext svc_ctx;
+ uint32_t i;
+ uint32_t frame_cnt = 0;
+ vpx_image_t raw;
+ vpx_codec_err_t res;
+ int pts = 0; /* PTS starts at 0 */
+ int frame_duration = 1; /* 1 timebase tick per frame */
+ FILE *infile = NULL;
+ int end_of_stream = 0;
+
+ memset(&svc_ctx, 0, sizeof(svc_ctx));
+ svc_ctx.log_print = 1;
+ exec_name = argv[0];
+ parse_command_line(argc, argv, &app_input, &svc_ctx, &enc_cfg);
+
+ // Allocate image buffer
+ if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, enc_cfg.g_w, enc_cfg.g_h, 32))
+ die("Failed to allocate image %dx%d\n", enc_cfg.g_w, enc_cfg.g_h);
+
+ if (!(infile = fopen(app_input.input_filename, "rb")))
+ die("Failed to open %s for reading\n", app_input.input_filename);
+
+ // Initialize codec
+ if (vpx_svc_init(&svc_ctx, &codec, vpx_codec_vp9_cx(), &enc_cfg) !=
+ VPX_CODEC_OK)
+ die("Failed to initialize encoder\n");
+
+ info.codec_fourcc = VP9_FOURCC;
+ info.time_base.numerator = enc_cfg.g_timebase.num;
+ info.time_base.denominator = enc_cfg.g_timebase.den;
+ if (vpx_svc_get_layer_resolution(&svc_ctx, svc_ctx.spatial_layers - 1,
+ (unsigned int *)&info.frame_width,
+ (unsigned int *)&info.frame_height) !=
+ VPX_CODEC_OK) {
+ die("Failed to get output resolution");
+ }
+
+ if (!(app_input.passes == 2 && app_input.pass == 1)) {
+ // We don't save the bitstream for the 1st pass on two pass rate control
+ writer = vpx_video_writer_open(app_input.output_filename, kContainerIVF,
+ &info);
+ if (!writer)
+ die("Failed to open %s for writing\n", app_input.output_filename);
+ }
+
+ // skip initial frames
+ for (i = 0; i < app_input.frames_to_skip; ++i)
+ vpx_img_read(&raw, infile);
+
+ // Encode frames
+ while (!end_of_stream) {
+ if (frame_cnt >= app_input.frames_to_code || !vpx_img_read(&raw, infile)) {
+ // We need one extra vpx_svc_encode call at end of stream to flush
+ // encoder and get remaining data
+ end_of_stream = 1;
+ }
+
+ res = vpx_svc_encode(&svc_ctx, &codec, (end_of_stream ? NULL : &raw),
+ pts, frame_duration, VPX_DL_REALTIME);
+ printf("%s", vpx_svc_get_message(&svc_ctx));
+ if (res != VPX_CODEC_OK) {
+ die_codec(&codec, "Failed to encode frame");
+ }
+ if (!(app_input.passes == 2 && app_input.pass == 1)) {
+ if (vpx_svc_get_frame_size(&svc_ctx) > 0) {
+ vpx_video_writer_write_frame(writer,
+ vpx_svc_get_buffer(&svc_ctx),
+ vpx_svc_get_frame_size(&svc_ctx),
+ pts);
+ }
+ }
+ if (vpx_svc_get_rc_stats_buffer_size(&svc_ctx) > 0) {
+ stats_write(&app_input.rc_stats,
+ vpx_svc_get_rc_stats_buffer(&svc_ctx),
+ vpx_svc_get_rc_stats_buffer_size(&svc_ctx));
+ }
+ if (!end_of_stream) {
+ ++frame_cnt;
+ pts += frame_duration;
+ }
+ }
+
+ printf("Processed %d frames\n", frame_cnt);
+
+ fclose(infile);
+ if (vpx_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
+
+ if (app_input.passes == 2)
+ stats_close(&app_input.rc_stats, 1);
+
+ if (writer) {
+ vpx_video_writer_close(writer);
+ }
+
+ vpx_img_free(&raw);
+
+ // display average size, psnr
+ printf("%s", vpx_svc_dump_statistics(&svc_ctx));
+
+ vpx_svc_release(&svc_ctx);
+
+ return EXIT_SUCCESS;
+}
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