summaryrefslogtreecommitdiff
path: root/media/libaom/src/examples/lightfield_bitstream_parsing.c
diff options
context:
space:
mode:
Diffstat (limited to 'media/libaom/src/examples/lightfield_bitstream_parsing.c')
-rw-r--r--media/libaom/src/examples/lightfield_bitstream_parsing.c372
1 files changed, 219 insertions, 153 deletions
diff --git a/media/libaom/src/examples/lightfield_bitstream_parsing.c b/media/libaom/src/examples/lightfield_bitstream_parsing.c
index 159f1617a..ffcbcb9cb 100644
--- a/media/libaom/src/examples/lightfield_bitstream_parsing.c
+++ b/media/libaom/src/examples/lightfield_bitstream_parsing.c
@@ -13,13 +13,28 @@
// ============================
//
// 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:
+// containing the whole compressed lightfield bitstream(ivf file) and a text
+// file containing a stream of tiles to decode and then 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
+// tile_list.txt
+//
+// The tile_list.txt is expected to be of the form:
+// Frame <frame_index0>
+// <image_index0> <anchor_index0> <tile_col0> <tile_row0>
+// <image_index1> <anchor_index1> <tile_col1> <tile_row1>
+// ...
+// Frame <frame_index1)
+// ...
+//
+// The "Frame" markers indicate a new render frame and thus a new tile list
+// will be started and the old one flushed. The image_indexN, anchor_indexN,
+// tile_colN, and tile_rowN identify an individual tile to be decoded and
+// to use anchor_indexN anchor image for MCP.
#include <stdio.h>
#include <stdlib.h>
@@ -39,7 +54,7 @@
static const char *exec_name;
void usage_exit(void) {
- fprintf(stderr, "Usage: %s <infile> <outfile> <num_references> \n",
+ fprintf(stderr, "Usage: %s <infile> <outfile> <num_references> <tile_list>\n",
exec_name);
exit(EXIT_FAILURE);
}
@@ -47,9 +62,8 @@ void usage_exit(void) {
#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;
+const int output_frame_width = 512;
+const int output_frame_height = 512;
// Spec:
// typedef struct {
@@ -68,32 +82,6 @@ typedef struct {
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;
@@ -107,6 +95,102 @@ static int get_image_bps(aom_img_fmt_t fmt) {
return 0;
}
+void process_tile_list(const TILE_LIST_INFO *tiles, int num_tiles,
+ aom_codec_pts_t tl_pts, unsigned char **frames,
+ const size_t *frame_sizes, aom_codec_ctx_t *codec,
+ unsigned char *tl_buf, AvxVideoWriter *writer,
+ uint8_t output_frame_width_in_tiles_minus_1,
+ uint8_t output_frame_height_in_tiles_minus_1) {
+ 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;
+ int num_tiles_minus_1 = num_tiles - 1;
+ int i;
+
+ // 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, num_tiles_minus_1, 16);
+ tl += 4;
+ tile_list_obu_size += 4;
+
+ // Write each tile's data
+ for (i = 0; i <= num_tiles_minus_1; i++) {
+ aom_tile_data tile_data = { 0, NULL, 0 };
+
+ int image_idx = tiles[i].image_idx;
+ int ref_idx = tiles[i].reference_idx;
+ int tc = tiles[i].tile_col;
+ int tr = tiles[i].tile_row;
+
+ // Reset bit writer to the right location.
+ wb.bit_buffer = tl;
+ wb.bit_offset = 0;
+
+ size_t frame_size = frame_sizes[image_idx];
+ const unsigned char *frame = frames[image_idx];
+
+ AOM_CODEC_CONTROL_TYPECHECKED(codec, AV1_SET_DECODE_TILE_ROW, tr);
+ AOM_CODEC_CONTROL_TYPECHECKED(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_TYPECHECKED(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.");
+}
+
int main(int argc, char **argv) {
aom_codec_ctx_t codec;
AvxVideoReader *reader = NULL;
@@ -114,11 +198,12 @@ int main(int argc, char **argv) {
const AvxInterface *decoder = NULL;
const AvxVideoInfo *info = NULL;
int num_references;
- int n, i;
+ int i;
aom_codec_pts_t pts;
+ const char *tile_list_file = NULL;
exec_name = argv[0];
- if (argc != 4) die("Invalid number of arguments.");
+ if (argc != 5) die("Invalid number of arguments.");
reader = aom_video_reader_open(argv[1]);
if (!reader) die("Failed to open %s for reading.", argv[1]);
@@ -126,11 +211,15 @@ int main(int argc, char **argv) {
num_references = (int)strtol(argv[3], NULL, 0);
info = aom_video_reader_get_info(reader);
+ aom_video_reader_set_fourcc(reader, AV1_FOURCC);
+
// 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]);
+ tile_list_file = argv[4];
+
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()));
@@ -139,8 +228,9 @@ int main(int argc, char **argv) {
die_codec(&codec, "Failed to initialize decoder.");
// Decode anchor frames.
- aom_codec_control_(&codec, AV1_SET_TILE_MODE, 0);
+ AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1_SET_TILE_MODE, 0);
+ printf("Reading %d reference images.\n", num_references);
for (i = 0; i < num_references; ++i) {
aom_video_reader_read_frame(reader);
@@ -158,35 +248,58 @@ int main(int argc, char **argv) {
}
// Decode camera frames.
- aom_codec_control_(&codec, AV1_SET_TILE_MODE, 1);
- aom_codec_control_(&codec, AV1D_EXT_TILE_DEBUG, 1);
+ AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1_SET_TILE_MODE, 1);
+ AOM_CODEC_CONTROL_TYPECHECKED(&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);
+ printf("Loading compressed frames into memory.\n");
- // Copy first camera frame for getting camera frame header. This is done
- // only once.
- {
+ // Count the frames in the lightfield.
+ int num_frames = 0;
+ while (aom_video_reader_read_frame(reader)) {
+ ++num_frames;
+ }
+ if (num_frames < 1) die("Input light field has no frames.");
+
+ // Read all of the lightfield frames into memory.
+ unsigned char **frames =
+ (unsigned char **)malloc(num_frames * sizeof(unsigned char *));
+ size_t *frame_sizes = (size_t *)malloc(num_frames * sizeof(size_t));
+ // Seek to the first camera image.
+ fseeko(infile, camera_frame_pos, SEEK_SET);
+ for (int f = 0; f < num_frames; ++f) {
+ 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);
+ frames[f] = (unsigned char *)malloc(frame_size * sizeof(unsigned char));
+ memcpy(frames[f], frame, frame_size);
+ frame_sizes[f] = frame_size;
+ }
+ printf("Read %d frames.\n", num_frames);
+
+ // Copy first camera frame for getting camera frame header. This is done
+ // only once.
+ {
+ size_t frame_size = frame_sizes[0];
+ const unsigned char *frame = frames[0];
+ pts = num_references;
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_CONTROL_TYPECHECKED(&codec, AV1_SET_DECODE_TILE_ROW, 0);
+ AOM_CODEC_CONTROL_TYPECHECKED(&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);
+ AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1D_GET_FRAME_HEADER_INFO,
+ &frame_header_info);
size_t obu_size_offset =
(uint8_t *)frame_header_info.coded_tile_data - frame;
@@ -218,128 +331,81 @@ int main(int argc, char **argv) {
// Read out the image format.
aom_img_fmt_t ref_fmt = 0;
- if (aom_codec_control(&codec, AV1D_GET_IMG_FORMAT, &ref_fmt))
+ if (AOM_CODEC_CONTROL_TYPECHECKED(&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))
+ if (AOM_CODEC_CONTROL_TYPECHECKED(&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++;
+ aom_codec_pts_t tl_pts = num_references;
+ const uint8_t output_frame_width_in_tiles_minus_1 =
+ output_frame_width / tile_width - 1;
+ const uint8_t output_frame_height_in_tiles_minus_1 =
+ output_frame_height / tile_height - 1;
+
+ printf("Reading tile list from file.\n");
+ char line[1024];
+ FILE *tile_list_fptr = fopen(tile_list_file, "r");
+ if (!tile_list_fptr) die_codec(&codec, "Failed to open tile list file.");
+ int num_tiles = 0;
+ TILE_LIST_INFO tiles[MAX_TILES];
+ while ((fgets(line, 1024, tile_list_fptr)) != NULL) {
+ if (line[0] == 'F' || num_tiles >= MAX_TILES) {
+ // Flush existing tile list and start another, either because we hit a
+ // new render frame or because we've hit our max number of tiles per list.
+ if (num_tiles > 0) {
+ process_tile_list(tiles, num_tiles, tl_pts, frames, frame_sizes, &codec,
+ tl_buf, writer, output_frame_width_in_tiles_minus_1,
+ output_frame_height_in_tiles_minus_1);
+ ++tl_pts;
}
-
- 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;
+ num_tiles = 0;
+ }
+ if (line[0] == 'F') {
+ continue;
+ }
+ if (sscanf(line, "%d %d %d %d", &tiles[num_tiles].image_idx,
+ &tiles[num_tiles].reference_idx, &tiles[num_tiles].tile_col,
+ &tiles[num_tiles].tile_row) == 4) {
+ if (tiles[num_tiles].image_idx >= num_frames) {
+ die("Tile list image_idx out of bounds: %d >= %d.",
+ tiles[num_tiles].image_idx, num_frames);
+ }
+ if (tiles[num_tiles].reference_idx >= num_references) {
+ die("Tile list reference_idx out of bounds: %d >= %d.",
+ tiles[num_tiles].reference_idx, num_references);
+ }
+ ++num_tiles;
}
-
- // 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++;
+ }
+ if (num_tiles > 0) {
+ // Flush out the last tile list.
+ process_tile_list(tiles, num_tiles, tl_pts, frames, frame_sizes, &codec,
+ tl_buf, writer, output_frame_width_in_tiles_minus_1,
+ output_frame_height_in_tiles_minus_1);
+ ++tl_pts;
}
+ const int num_tile_lists = (int)(tl_pts - pts);
+ printf("Finished processing tile lists. Num tile lists: %d.\n",
+ num_tile_lists);
free(tl_buf);
+ for (int f = 0; f < num_frames; ++f) {
+ free(frames[f]);
+ }
+ free(frame_sizes);
+ free(frames);
if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
aom_video_writer_close(writer);
aom_video_reader_close(reader);
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-13 09:49:05 +0000