Move aom source to a sub-directory under media/libaom

There is no damned reason to treat this differently than any other media lib given its license and there never was.

1 files changed, 348 insertions, 0 deletions

diff --git a/media/libaom/src/examples/lightfield_bitstream_parsing.c b/media/libaom/src/examples/lightfield_bitstream_parsing.c
new file mode 100644
index 000000000..159f1617a
--- /dev/null
+++ b/media/libaom/src/examples/lightfield_bitstream_parsing.c
@@ -0,0 +1,348 @@
+/*
+ * Copyright (c) 2018, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+// Lightfield Bitstream Parsing
+// ============================
+//
+// This is a lightfield bitstream parsing example. It takes an input file
+// containing the whole compressed lightfield bitstream(ivf file), and parses it
+// and constructs and outputs a new bitstream that can be decoded by an AV1
+// decoder. The output bitstream contains reference frames(i.e. anchor frames),
+// camera frame header, and tile list OBUs. num_references is the number of
+// anchor frames coded at the beginning of the light field file.
+// After running the lightfield encoder, run lightfield bitstream parsing:
+// examples/lightfield_bitstream_parsing vase10x10.ivf vase_tile_list.ivf 4
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "aom/aom_decoder.h"
+#include "aom/aom_encoder.h"
+#include "aom/aom_integer.h"
+#include "aom/aomdx.h"
+#include "aom_dsp/bitwriter_buffer.h"
+#include "common/tools_common.h"
+#include "common/video_reader.h"
+#include "common/video_writer.h"
+
+#define MAX_TILES 512
+
+static const char *exec_name;
+
+void usage_exit(void) {
+  fprintf(stderr, "Usage: %s <infile> <outfile> <num_references> \n",
+          exec_name);
+  exit(EXIT_FAILURE);
+}
+
+#define ALIGN_POWER_OF_TWO(value, n) \
+  (((value) + ((1 << (n)) - 1)) & ~((1 << (n)) - 1))
+
+// SB size: 64x64
+const uint8_t output_frame_width_in_tiles_minus_1 = 512 / 64 - 1;
+const uint8_t output_frame_height_in_tiles_minus_1 = 512 / 64 - 1;
+
+// Spec:
+// typedef struct {
+//   uint8_t anchor_frame_idx;
+//   uint8_t tile_row;
+//   uint8_t tile_col;
+//   uint16_t coded_tile_data_size_minus_1;
+//   uint8_t *coded_tile_data;
+// } TILE_LIST_ENTRY;
+
+// Tile list entry provided by the application
+typedef struct {
+  int image_idx;
+  int reference_idx;
+  int tile_col;
+  int tile_row;
+} TILE_LIST_INFO;
+
+// M references: 0 - M-1; N images(including references): 0 - N-1;
+// Note: order the image index incrementally, so that we only go through the
+// bitstream once to construct the tile list.
+const int num_tile_lists = 2;
+const uint16_t tile_count_minus_1 = 9 - 1;
+const TILE_LIST_INFO tile_list[2][9] = {
+  { { 16, 0, 4, 5 },
+    { 83, 3, 13, 2 },
+    { 57, 2, 2, 6 },
+    { 31, 1, 11, 5 },
+    { 2, 0, 7, 4 },
+    { 77, 3, 9, 9 },
+    { 49, 1, 0, 1 },
+    { 6, 0, 3, 10 },
+    { 63, 2, 5, 8 } },
+  { { 65, 2, 11, 1 },
+    { 42, 1, 3, 7 },
+    { 88, 3, 8, 4 },
+    { 76, 3, 1, 15 },
+    { 1, 0, 2, 2 },
+    { 19, 0, 5, 6 },
+    { 60, 2, 4, 0 },
+    { 25, 1, 11, 15 },
+    { 50, 2, 5, 4 } },
+};
+
+static int get_image_bps(aom_img_fmt_t fmt) {
+  switch (fmt) {
+    case AOM_IMG_FMT_I420: return 12;
+    case AOM_IMG_FMT_I422: return 16;
+    case AOM_IMG_FMT_I444: return 24;
+    case AOM_IMG_FMT_I42016: return 24;
+    case AOM_IMG_FMT_I42216: return 32;
+    case AOM_IMG_FMT_I44416: return 48;
+    default: die("Invalid image format");
+  }
+  return 0;
+}
+
+int main(int argc, char **argv) {
+  aom_codec_ctx_t codec;
+  AvxVideoReader *reader = NULL;
+  AvxVideoWriter *writer = NULL;
+  const AvxInterface *decoder = NULL;
+  const AvxVideoInfo *info = NULL;
+  int num_references;
+  int n, i;
+  aom_codec_pts_t pts;
+
+  exec_name = argv[0];
+  if (argc != 4) die("Invalid number of arguments.");
+
+  reader = aom_video_reader_open(argv[1]);
+  if (!reader) die("Failed to open %s for reading.", argv[1]);
+
+  num_references = (int)strtol(argv[3], NULL, 0);
+  info = aom_video_reader_get_info(reader);
+
+  // The writer to write out ivf file in tile list OBU, which can be decoded by
+  // AV1 decoder.
+  writer = aom_video_writer_open(argv[2], kContainerIVF, info);
+  if (!writer) die("Failed to open %s for writing", argv[2]);
+
+  decoder = get_aom_decoder_by_fourcc(info->codec_fourcc);
+  if (!decoder) die("Unknown input codec.");
+  printf("Using %s\n", aom_codec_iface_name(decoder->codec_interface()));
+
+  if (aom_codec_dec_init(&codec, decoder->codec_interface(), NULL, 0))
+    die_codec(&codec, "Failed to initialize decoder.");
+
+  // Decode anchor frames.
+  aom_codec_control_(&codec, AV1_SET_TILE_MODE, 0);
+
+  for (i = 0; i < num_references; ++i) {
+    aom_video_reader_read_frame(reader);
+
+    size_t frame_size = 0;
+    const unsigned char *frame =
+        aom_video_reader_get_frame(reader, &frame_size);
+    pts = (aom_codec_pts_t)aom_video_reader_get_frame_pts(reader);
+
+    // Copy references bitstream directly.
+    if (!aom_video_writer_write_frame(writer, frame, frame_size, pts))
+      die_codec(&codec, "Failed to copy compressed anchor frame.");
+
+    if (aom_codec_decode(&codec, frame, frame_size, NULL))
+      die_codec(&codec, "Failed to decode frame.");
+  }
+
+  // Decode camera frames.
+  aom_codec_control_(&codec, AV1_SET_TILE_MODE, 1);
+  aom_codec_control_(&codec, AV1D_EXT_TILE_DEBUG, 1);
+
+  FILE *infile = aom_video_reader_get_file(reader);
+  // Record the offset of the first camera image.
+  const FileOffset camera_frame_pos = ftello(infile);
+
+  // Read out the first camera frame.
+  aom_video_reader_read_frame(reader);
+
+  // Copy first camera frame for getting camera frame header. This is done
+  // only once.
+  {
+    size_t frame_size = 0;
+    const unsigned char *frame =
+        aom_video_reader_get_frame(reader, &frame_size);
+    pts = (aom_codec_pts_t)aom_video_reader_get_frame_pts(reader);
+    aom_tile_data frame_header_info = { 0, NULL, 0 };
+
+    // Need to decode frame header to get camera frame header info. So, here
+    // decoding 1 tile is enough.
+    aom_codec_control_(&codec, AV1_SET_DECODE_TILE_ROW, 0);
+    aom_codec_control_(&codec, AV1_SET_DECODE_TILE_COL, 0);
+
+    aom_codec_err_t aom_status =
+        aom_codec_decode(&codec, frame, frame_size, NULL);
+    if (aom_status) die_codec(&codec, "Failed to decode tile.");
+
+    aom_codec_control_(&codec, AV1D_GET_FRAME_HEADER_INFO, &frame_header_info);
+
+    size_t obu_size_offset =
+        (uint8_t *)frame_header_info.coded_tile_data - frame;
+    size_t length_field_size = frame_header_info.coded_tile_data_size;
+    // Remove ext-tile tile info.
+    uint32_t frame_header_size = (uint32_t)frame_header_info.extra_size - 1;
+    size_t bytes_to_copy =
+        obu_size_offset + length_field_size + frame_header_size;
+
+    unsigned char *frame_hdr_buf = (unsigned char *)malloc(bytes_to_copy);
+    if (frame_hdr_buf == NULL)
+      die_codec(&codec, "Failed to allocate frame header buffer.");
+
+    memcpy(frame_hdr_buf, frame, bytes_to_copy);
+
+    // Update frame header OBU size.
+    size_t bytes_written = 0;
+    if (aom_uleb_encode_fixed_size(
+            frame_header_size, length_field_size, length_field_size,
+            frame_hdr_buf + obu_size_offset, &bytes_written))
+      die_codec(&codec, "Failed to encode the tile list obu size.");
+
+    // Copy camera frame header bitstream.
+    if (!aom_video_writer_write_frame(writer, frame_hdr_buf, bytes_to_copy,
+                                      pts))
+      die_codec(&codec, "Failed to copy compressed camera frame header.");
+    free(frame_hdr_buf);
+  }
+
+  // Read out the image format.
+  aom_img_fmt_t ref_fmt = 0;
+  if (aom_codec_control(&codec, AV1D_GET_IMG_FORMAT, &ref_fmt))
+    die_codec(&codec, "Failed to get the image format");
+  const int bps = get_image_bps(ref_fmt);
+  if (!bps) die_codec(&codec, "Invalid image format.");
+  // read out the tile size.
+  unsigned int tile_size = 0;
+  if (aom_codec_control(&codec, AV1D_GET_TILE_SIZE, &tile_size))
+    die_codec(&codec, "Failed to get the tile size");
+  const unsigned int tile_width = tile_size >> 16;
+  const unsigned int tile_height = tile_size & 65535;
+  // Allocate a buffer to store tile list bitstream.
+  const size_t data_sz = MAX_TILES * ALIGN_POWER_OF_TWO(tile_width, 5) *
+                         ALIGN_POWER_OF_TWO(tile_height, 5) * bps / 8;
+  unsigned char *tl_buf = (unsigned char *)malloc(data_sz);
+  if (tl_buf == NULL) die_codec(&codec, "Failed to allocate tile list buffer.");
+
+  aom_codec_pts_t tl_pts = pts;
+
+  // Process 1 tile list.
+  for (n = 0; n < num_tile_lists; n++) {
+    unsigned char *tl = tl_buf;
+    struct aom_write_bit_buffer wb = { tl, 0 };
+    unsigned char *saved_obu_size_loc = NULL;
+    uint32_t tile_list_obu_header_size = 0;
+    uint32_t tile_list_obu_size = 0;
+
+    // Write the tile list OBU header that is 1 byte long.
+    aom_wb_write_literal(&wb, 0, 1);  // forbidden bit.
+    aom_wb_write_literal(&wb, 8, 4);  // tile list OBU: "1000"
+    aom_wb_write_literal(&wb, 0, 1);  // obu_extension = 0
+    aom_wb_write_literal(&wb, 1, 1);  // obu_has_size_field
+    aom_wb_write_literal(&wb, 0, 1);  // reserved
+    tl++;
+    tile_list_obu_header_size++;
+
+    // Write the OBU size using a fixed length_field_size of 4 bytes.
+    saved_obu_size_loc = tl;
+    // aom_wb_write_unsigned_literal(&wb, data, bits) requires that bits <= 32.
+    aom_wb_write_unsigned_literal(&wb, 0, 32);
+    tl += 4;
+    tile_list_obu_header_size += 4;
+
+    // write_tile_list_obu()
+    aom_wb_write_literal(&wb, output_frame_width_in_tiles_minus_1, 8);
+    aom_wb_write_literal(&wb, output_frame_height_in_tiles_minus_1, 8);
+    aom_wb_write_literal(&wb, tile_count_minus_1, 16);
+    tl += 4;
+    tile_list_obu_size += 4;
+
+    // Write each tile's data
+    for (i = 0; i <= tile_count_minus_1; i++) {
+      aom_tile_data tile_data = { 0, NULL, 0 };
+
+      int image_idx = tile_list[n][i].image_idx;
+      int ref_idx = tile_list[n][i].reference_idx;
+      int tc = tile_list[n][i].tile_col;
+      int tr = tile_list[n][i].tile_row;
+      int frame_cnt = -1;
+
+      // Reset bit writer to the right location.
+      wb.bit_buffer = tl;
+      wb.bit_offset = 0;
+
+      // Seek to the first camera image.
+      fseeko(infile, camera_frame_pos, SEEK_SET);
+
+      // Read out the camera image
+      while (frame_cnt != image_idx) {
+        aom_video_reader_read_frame(reader);
+        frame_cnt++;
+      }
+
+      size_t frame_size = 0;
+      const unsigned char *frame =
+          aom_video_reader_get_frame(reader, &frame_size);
+
+      aom_codec_control_(&codec, AV1_SET_DECODE_TILE_ROW, tr);
+      aom_codec_control_(&codec, AV1_SET_DECODE_TILE_COL, tc);
+
+      aom_codec_err_t aom_status =
+          aom_codec_decode(&codec, frame, frame_size, NULL);
+      if (aom_status) die_codec(&codec, "Failed to decode tile.");
+
+      aom_codec_control_(&codec, AV1D_GET_TILE_DATA, &tile_data);
+
+      // Copy over tile info.
+      //  uint8_t anchor_frame_idx;
+      //  uint8_t tile_row;
+      //  uint8_t tile_col;
+      //  uint16_t coded_tile_data_size_minus_1;
+      //  uint8_t *coded_tile_data;
+      uint32_t tile_info_bytes = 5;
+      aom_wb_write_literal(&wb, ref_idx, 8);
+      aom_wb_write_literal(&wb, tr, 8);
+      aom_wb_write_literal(&wb, tc, 8);
+      aom_wb_write_literal(&wb, (int)tile_data.coded_tile_data_size - 1, 16);
+      tl += tile_info_bytes;
+
+      memcpy(tl, (uint8_t *)tile_data.coded_tile_data,
+             tile_data.coded_tile_data_size);
+      tl += tile_data.coded_tile_data_size;
+
+      tile_list_obu_size +=
+          tile_info_bytes + (uint32_t)tile_data.coded_tile_data_size;
+    }
+
+    // Write tile list OBU size.
+    size_t bytes_written = 0;
+    if (aom_uleb_encode_fixed_size(tile_list_obu_size, 4, 4, saved_obu_size_loc,
+                                   &bytes_written))
+      die_codec(&codec, "Failed to encode the tile list obu size.");
+
+    // Copy the tile list.
+    if (!aom_video_writer_write_frame(
+            writer, tl_buf, tile_list_obu_header_size + tile_list_obu_size,
+            tl_pts))
+      die_codec(&codec, "Failed to copy compressed tile list.");
+
+    tl_pts++;
+  }
+
+  free(tl_buf);
+  if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
+  aom_video_writer_close(writer);
+  aom_video_reader_close(reader);
+
+  return EXIT_SUCCESS;
+}