added video test

1 files changed, 239 insertions, 0 deletions

diff --git a/code/test/vid/enc.c b/code/test/vid/enc.c
new file mode 100644
index 0000000..a1730b4
--- /dev/null
+++ b/code/test/vid/enc.c
@@ -0,0 +1,239 @@
+/*
+ *  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.
+ */
+
+// Simple Encoder
+// ==============
+//
+// This is an example of a simple encoder loop. It takes an input file in
+// YV12 format, passes it through the encoder, and writes the compressed
+// frames to disk in IVF format. Other decoder examples build upon this
+// one.
+//
+// The details of the IVF format have been elided from this example for
+// simplicity of presentation, as IVF files will not generally be used by
+// your application. In general, an IVF file consists of a file header,
+// followed by a variable number of frames. Each frame consists of a frame
+// header followed by a variable length payload. The length of the payload
+// is specified in the first four bytes of the frame header. The payload is
+// the raw compressed data.
+//
+// Standard Includes
+// -----------------
+// For encoders, you only have to include `vpx_encoder.h` and then any
+// header files for the specific codecs you use. In this case, we're using
+// vp8.
+//
+// Getting The Default Configuration
+// ---------------------------------
+// Encoders have the notion of "usage profiles." For example, an encoder
+// may want to publish default configurations for both a video
+// conferencing application and a best quality offline encoder. These
+// obviously have very different default settings. Consult the
+// documentation for your codec to see if it provides any default
+// configurations. All codecs provide a default configuration, number 0,
+// which is valid for material in the vacinity of QCIF/QVGA.
+//
+// Updating The Configuration
+// ---------------------------------
+// Almost all applications will want to update the default configuration
+// with settings specific to their usage. Here we set the width and height
+// of the video file to that specified on the command line. We also scale
+// the default bitrate based on the ratio between the default resolution
+// and the resolution specified on the command line.
+//
+// Initializing The Codec
+// ----------------------
+// The encoder is initialized by the following code.
+//
+// Encoding A Frame
+// ----------------
+// The frame is read as a continuous block (size width * height * 3 / 2)
+// from the input file. If a frame was read (the input file has not hit
+// EOF) then the frame is passed to the encoder. Otherwise, a NULL
+// is passed, indicating the End-Of-Stream condition to the encoder. The
+// `frame_cnt` is reused as the presentation time stamp (PTS) and each
+// frame is shown for one frame-time in duration. The flags parameter is
+// unused in this example. The deadline is set to VPX_DL_REALTIME to
+// make the example run as quickly as possible.
+
+// Forced Keyframes
+// ----------------
+// Keyframes can be forced by setting the VPX_EFLAG_FORCE_KF bit of the
+// flags passed to `vpx_codec_control()`. In this example, we force a
+// keyframe every <keyframe-interval> frames. Note, the output stream can
+// contain additional keyframes beyond those that have been forced using the
+// VPX_EFLAG_FORCE_KF flag because of automatic keyframe placement by the
+// encoder.
+//
+// Processing The Encoded Data
+// ---------------------------
+// Each packet of type `VPX_CODEC_CX_FRAME_PKT` contains the encoded data
+// for this frame. We write a IVF frame header, followed by the raw data.
+//
+// Cleanup
+// -------
+// The `vpx_codec_destroy` call frees any memory allocated by the codec.
+//
+// Error Handling
+// --------------
+// This example does not special case any error return codes. If there was
+// an error, a descriptive message is printed and the program exits. With
+// few exeptions, vpx_codec functions return an enumerated error status,
+// with the value `0` indicating success.
+//
+// Error Resiliency Features
+// -------------------------
+// Error resiliency is controlled by the g_error_resilient member of the
+// configuration structure. Use the `decode_with_drops` example to decode with
+// frames 5-10 dropped. Compare the output for a file encoded with this example
+// versus one encoded with the `simple_encoder` example.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "enc.h"
+
+static const char *exec_name = "./enc";
+
+void usage_exit(void) {
+  fprintf(stderr,
+          "Usage: %s <codec> <width> <height> <infile> <outfile> "
+          "<keyframe-interval> <error-resilient> <frames to encode>\n"
+          "See comments in simple_encoder.c for more information.\n",
+          exec_name);
+  exit(EXIT_FAILURE);
+}
+
+static VpxVideoWriter *writer;
+
+static VpxVideoWriter *open_writer(const char *file_name, uint32_t fourcc, int width, int height, int fps) {
+  VpxVideoInfo info = { 0, 0, 0, { 0, 0 } };
+  
+  info.codec_fourcc = fourcc;
+  info.frame_width = width;
+  info.frame_height = height;
+  info.time_base.numerator = 1;
+  info.time_base.denominator = fps;
+
+  return vpx_video_writer_open(file_name, kContainerIVF, &info);
+}
+
+// TODO(dkovalev): move this function to vpx_image.{c, h}, so it will be part
+// of vpx_image_t support
+int vpx_img_plane_width(const vpx_image_t *img, int plane) {
+  if (plane > 0 && img->x_chroma_shift > 0)
+    return (img->d_w + 1) >> img->x_chroma_shift;
+  else
+    return img->d_w;
+}
+
+int vpx_img_plane_height(const vpx_image_t *img, int plane) {
+  if (plane > 0 && img->y_chroma_shift > 0)
+    return (img->d_h + 1) >> img->y_chroma_shift;
+  else
+    return img->d_h;
+}
+
+int vpx_img_read(vpx_image_t *img, void *img_buf, int sz) {
+  int plane;
+
+  for (plane = 0; plane < 3; ++plane) {
+    unsigned char *buf = img->planes[plane];
+    const int stride = img->stride[plane];
+    const int w = vpx_img_plane_width(img, plane) *
+                  ((img->fmt & VPX_IMG_FMT_HIGHBITDEPTH) ? 2 : 1);
+    const int h = vpx_img_plane_height(img, plane);
+    int y;
+
+    for (y = 0; y < h; ++y) {
+      memcpy(buf, img_buf, w);
+      img_buf += w;
+      buf += stride;
+    }
+  }
+
+  return 1;
+}
+
+int vpx_encode_frame(vpx_codec_ctx_t *codec, vpx_image_t *img, int frame_index, int flags) {
+  int got_pkts = 0;
+  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, flags, VPX_DL_REALTIME);
+  if (res != VPX_CODEC_OK) die_codec(codec, "Failed to encode frame");
+
+  while ((pkt = vpx_codec_get_cx_data(codec, &iter)) != NULL) {
+    got_pkts = 1;
+
+    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);
+    }
+  }
+
+  return got_pkts;
+}
+
+
+void vpx_open(vpx_codec_ctx_t *codec, vpx_codec_iface_t *codec_interface, int width, int height, int fps, int bitrate, vpx_codec_er_flags_t err_resilient, vpx_image_t *raw) {
+  vpx_codec_enc_cfg_t cfg;
+  vpx_codec_err_t res;
+
+  res = vpx_codec_enc_config_default(codec_interface, &cfg, 0);
+  if (res) die("Failed to get default codec config.");
+
+  cfg.g_w = width;
+  cfg.g_h = height;
+  cfg.g_timebase.num = 1;
+  cfg.g_timebase.den = fps;
+  cfg.rc_target_bitrate = bitrate;
+  cfg.g_error_resilient = err_resilient;
+  cfg.rc_end_usage = VPX_CBR;
+
+  if (vpx_codec_enc_init(codec, codec_interface, &cfg, 0))
+    die_codec(codec, "Failed to initialize encoder");
+
+  if (vpx_codec_control(codec, VP8E_SET_CPUUSED, 8))
+    die_codec(codec, "Failed to initialize cpuused");
+
+  if (!vpx_img_alloc(raw, VPX_IMG_FMT_I420, width, height, 1)) {
+    die("Failed to allocate image.");
+  }
+}
+
+void vpx_close(vpx_codec_ctx_t *codec, vpx_image_t *raw) {
+  // Flush encoder.
+  while (vpx_encode_frame(codec, NULL, -1, 0)) {
+  }
+
+  vpx_img_free(raw);
+  if (vpx_codec_destroy(codec)) die_codec(codec, "Failed to destroy codec.");
+
+  vpx_video_writer_close(writer);
+}
+
+void vpx_init(const char *codec_arg, const char *outfile_arg, int width, int height, int fps) {
+  const VpxInterface *encoder = get_vpx_encoder_by_name(codec_arg);
+  if (!encoder) die("Unsupported codec.");
+  
+  writer = open_writer(outfile_arg, encoder->fourcc, width, height, fps);
+  if (!writer) die("Failed to open %s for writing.", outfile_arg);
+
+  printf("Using %s\n", vpx_codec_iface_name(encoder->codec_interface()));
+}
+