Index: source/libvpx/examples/set_maps.c |
=================================================================== |
--- source/libvpx/examples/set_maps.c (revision 0) |
+++ source/libvpx/examples/set_maps.c (revision 0) |
@@ -0,0 +1,243 @@ |
+/* |
+ * Copyright (c) 2010 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. |
+ */ |
+ |
+ |
+// VP8 Set Active and ROI Maps |
+// =========================== |
+// |
+// This is an example demonstrating how to control the VP8 encoder's |
+// ROI and Active maps. |
+// |
+// ROI (Reigon of Interest) maps are a way for the application to assign |
+// each macroblock in the image to a region, and then set quantizer and |
+// filtering parameters on that image. |
+// |
+// Active maps are a way for the application to specify on a |
+// macroblock-by-macroblock basis whether there is any activity in that |
+// macroblock. |
+// |
+// |
+// Configuration |
+// ------------- |
+// An ROI map is set on frame 22. If the width of the image in macroblocks |
+// is evenly divisble by 4, then the output will appear to have distinct |
+// columns, where the quantizer, loopfilter, and static threshold differ |
+// from column to column. |
+// |
+// An active map is set on frame 33. If the width of the image in macroblocks |
+// is evenly divisble by 4, then the output will appear to have distinct |
+// columns, where one column will have motion and the next will not. |
+// |
+// The active map is cleared on frame 44. |
+// |
+// Observing The Effects |
+// --------------------- |
+// Use the `simple_decoder` example to decode this sample, and observe |
+// the change in the image at frames 22, 33, and 44. |
+ |
+#include <stdio.h> |
+#include <stdlib.h> |
+#include <string.h> |
+ |
+#define VPX_CODEC_DISABLE_COMPAT 1 |
+#include "vpx/vp8cx.h" |
+#include "vpx/vpx_encoder.h" |
+ |
+#include "./tools_common.h" |
+#include "./video_writer.h" |
+ |
+static const char *exec_name; |
+ |
+void usage_exit() { |
+ fprintf(stderr, "Usage: %s <codec> <width> <height> <infile> <outfile>\n", |
+ exec_name); |
+ exit(EXIT_FAILURE); |
+} |
+ |
+static void set_roi_map(const vpx_codec_enc_cfg_t *cfg, |
+ vpx_codec_ctx_t *codec) { |
+ unsigned int i; |
+ vpx_roi_map_t roi = {0}; |
+ |
+ roi.rows = (cfg->g_h + 15) / 16; |
+ roi.cols = (cfg->g_w + 15) / 16; |
+ |
+ roi.delta_q[0] = 0; |
+ roi.delta_q[1] = -2; |
+ roi.delta_q[2] = -4; |
+ roi.delta_q[3] = -6; |
+ |
+ roi.delta_lf[0] = 0; |
+ roi.delta_lf[1] = 1; |
+ roi.delta_lf[2] = 2; |
+ roi.delta_lf[3] = 3; |
+ |
+ roi.static_threshold[0] = 1500; |
+ roi.static_threshold[1] = 1000; |
+ roi.static_threshold[2] = 500; |
+ roi.static_threshold[3] = 0; |
+ |
+ roi.roi_map = (uint8_t *)malloc(roi.rows * roi.cols); |
+ for (i = 0; i < roi.rows * roi.cols; ++i) |
+ roi.roi_map[i] = i % 4; |
+ |
+ if (vpx_codec_control(codec, VP8E_SET_ROI_MAP, &roi)) |
+ die_codec(codec, "Failed to set ROI map"); |
+ |
+ free(roi.roi_map); |
+} |
+ |
+static void set_active_map(const vpx_codec_enc_cfg_t *cfg, |
+ vpx_codec_ctx_t *codec) { |
+ unsigned int i; |
+ vpx_active_map_t map = {0}; |
+ |
+ map.rows = (cfg->g_h + 15) / 16; |
+ map.cols = (cfg->g_w + 15) / 16; |
+ |
+ map.active_map = (uint8_t *)malloc(map.rows * map.cols); |
+ for (i = 0; i < map.rows * map.cols; ++i) |
+ map.active_map[i] = i % 2; |
+ |
+ if (vpx_codec_control(codec, VP8E_SET_ACTIVEMAP, &map)) |
+ die_codec(codec, "Failed to set active map"); |
+ |
+ free(map.active_map); |
+} |
+ |
+static void unset_active_map(const vpx_codec_enc_cfg_t *cfg, |
+ vpx_codec_ctx_t *codec) { |
+ vpx_active_map_t map = {0}; |
+ |
+ map.rows = (cfg->g_h + 15) / 16; |
+ map.cols = (cfg->g_w + 15) / 16; |
+ map.active_map = NULL; |
+ |
+ if (vpx_codec_control(codec, VP8E_SET_ACTIVEMAP, &map)) |
+ die_codec(codec, "Failed to set active map"); |
+} |
+ |
+static void encode_frame(vpx_codec_ctx_t *codec, |
+ vpx_image_t *img, |
+ int frame_index, |
+ VpxVideoWriter *writer) { |
+ vpx_codec_iter_t iter = NULL; |
+ const vpx_codec_cx_pkt_t *pkt = NULL; |
+ const vpx_codec_err_t res = vpx_codec_encode(codec, img, frame_index, 1, 0, |
+ VPX_DL_GOOD_QUALITY); |
+ if (res != VPX_CODEC_OK) |
+ die_codec(codec, "Failed to encode frame"); |
+ |
+ while ((pkt = vpx_codec_get_cx_data(codec, &iter)) != NULL) { |
+ if (pkt->kind == VPX_CODEC_CX_FRAME_PKT) { |
+ const int keyframe = (pkt->data.frame.flags & VPX_FRAME_IS_KEY) != 0; |
+ if (!vpx_video_writer_write_frame(writer, |
+ pkt->data.frame.buf, |
+ pkt->data.frame.sz, |
+ pkt->data.frame.pts)) { |
+ die_codec(codec, "Failed to write compressed frame"); |
+ } |
+ |
+ printf(keyframe ? "K" : "."); |
+ fflush(stdout); |
+ } |
+ } |
+} |
+ |
+int main(int argc, char **argv) { |
+ FILE *infile = NULL; |
+ vpx_codec_ctx_t codec = {0}; |
+ vpx_codec_enc_cfg_t cfg = {0}; |
+ int frame_count = 0; |
+ vpx_image_t raw = {0}; |
+ vpx_codec_err_t res; |
+ VpxVideoInfo info = {0}; |
+ VpxVideoWriter *writer = NULL; |
+ const VpxInterface *encoder = NULL; |
+ const int fps = 2; // TODO(dkovalev) add command line argument |
+ const double bits_per_pixel_per_frame = 0.067; |
+ |
+ exec_name = argv[0]; |
+ |
+ if (argc != 6) |
+ die("Invalid number of arguments"); |
+ |
+ encoder = get_vpx_encoder_by_name(argv[1]); |
+ if (!encoder) |
+ die("Unsupported codec."); |
+ |
+ info.codec_fourcc = encoder->fourcc; |
+ info.frame_width = strtol(argv[2], NULL, 0); |
+ info.frame_height = strtol(argv[3], NULL, 0); |
+ info.time_base.numerator = 1; |
+ info.time_base.denominator = fps; |
+ |
+ if (info.frame_width <= 0 || |
+ info.frame_height <= 0 || |
+ (info.frame_width % 2) != 0 || |
+ (info.frame_height % 2) != 0) { |
+ die("Invalid frame size: %dx%d", info.frame_width, info.frame_height); |
+ } |
+ |
+ if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, info.frame_width, |
+ info.frame_height, 1)) { |
+ die("Failed to allocate image."); |
+ } |
+ |
+ printf("Using %s\n", vpx_codec_iface_name(encoder->interface())); |
+ |
+ res = vpx_codec_enc_config_default(encoder->interface(), &cfg, 0); |
+ if (res) |
+ die_codec(&codec, "Failed to get default codec config."); |
+ |
+ cfg.g_w = info.frame_width; |
+ cfg.g_h = info.frame_height; |
+ cfg.g_timebase.num = info.time_base.numerator; |
+ cfg.g_timebase.den = info.time_base.denominator; |
+ cfg.rc_target_bitrate = (unsigned int)(bits_per_pixel_per_frame * cfg.g_w * |
+ cfg.g_h * fps / 1000); |
+ cfg.g_lag_in_frames = 0; |
+ |
+ writer = vpx_video_writer_open(argv[5], kContainerIVF, &info); |
+ if (!writer) |
+ die("Failed to open %s for writing.", argv[5]); |
+ |
+ if (!(infile = fopen(argv[4], "rb"))) |
+ die("Failed to open %s for reading.", argv[4]); |
+ |
+ if (vpx_codec_enc_init(&codec, encoder->interface(), &cfg, 0)) |
+ die_codec(&codec, "Failed to initialize encoder"); |
+ |
+ while (vpx_img_read(&raw, infile)) { |
+ ++frame_count; |
+ |
+ if (frame_count == 22 && encoder->fourcc == VP8_FOURCC) { |
+ set_roi_map(&cfg, &codec); |
+ } else if (frame_count == 33) { |
+ set_active_map(&cfg, &codec); |
+ } else if (frame_count == 44) { |
+ unset_active_map(&cfg, &codec); |
+ } |
+ |
+ encode_frame(&codec, &raw, frame_count, writer); |
+ } |
+ encode_frame(&codec, NULL, -1, writer); |
+ printf("\n"); |
+ fclose(infile); |
+ printf("Processed %d frames.\n", frame_count); |
+ |
+ vpx_img_free(&raw); |
+ if (vpx_codec_destroy(&codec)) |
+ die_codec(&codec, "Failed to destroy codec."); |
+ |
+ vpx_video_writer_close(writer); |
+ |
+ return EXIT_SUCCESS; |
+} |