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Diffstat (limited to 'third_party/aom/examples/scalable_decoder.c')
| -rw-r--r-- | third_party/aom/examples/scalable_decoder.c | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/third_party/aom/examples/scalable_decoder.c b/third_party/aom/examples/scalable_decoder.c deleted file mode 100644 index c22924223..000000000 --- a/third_party/aom/examples/scalable_decoder.c +++ /dev/null @@ -1,185 +0,0 @@ -/* - * 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. - */ - -// Scalable Decoder -// ============== -// -// This is an example of a scalable decoder loop. It takes a 2-spatial-layer -// input file -// containing the compressed data (in OBU format), passes it through the -// decoder, and writes the decompressed frames to disk. The base layer and -// enhancement layers are stored as separate files, out_lyr0.yuv and -// out_lyr1.yuv, respectively. -// -// Standard Includes -// ----------------- -// For decoders, you only have to include `aom_decoder.h` and then any -// header files for the specific codecs you use. In this case, we're using -// av1. -// -// Initializing The Codec -// ---------------------- -// The libaom decoder is initialized by the call to aom_codec_dec_init(). -// Determining the codec interface to use is handled by AvxVideoReader and the -// functions prefixed with aom_video_reader_. Discussion of those functions is -// beyond the scope of this example, but the main gist is to open the input file -// and parse just enough of it to determine if it's a AVx file and which AVx -// codec is contained within the file. -// Note the NULL pointer passed to aom_codec_dec_init(). We do that in this -// example because we want the algorithm to determine the stream configuration -// (width/height) and allocate memory automatically. -// -// Decoding A Frame -// ---------------- -// Once the frame has been read into memory, it is decoded using the -// `aom_codec_decode` function. The call takes a pointer to the data -// (`frame`) and the length of the data (`frame_size`). No application data -// is associated with the frame in this example, so the `user_priv` -// parameter is NULL. The `deadline` parameter is left at zero for this -// example. This parameter is generally only used when doing adaptive post -// processing. -// -// Codecs may produce a variable number of output frames for every call to -// `aom_codec_decode`. These frames are retrieved by the -// `aom_codec_get_frame` iterator function. The iterator variable `iter` is -// initialized to NULL each time `aom_codec_decode` is called. -// `aom_codec_get_frame` is called in a loop, returning a pointer to a -// decoded image or NULL to indicate the end of list. -// -// Processing The Decoded Data -// --------------------------- -// In this example, we simply write the encoded data to disk. It is -// important to honor the image's `stride` values. -// -// Cleanup -// ------- -// The `aom_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 exceptions, aom_codec functions return an enumerated error status, -// with the value `0` indicating success. - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "aom/aom_decoder.h" -#include "aom/aomdx.h" -#include "common/obudec.h" -#include "common/tools_common.h" -#include "common/video_reader.h" - -static const char *exec_name; - -#define MAX_LAYERS 5 - -void usage_exit(void) { - fprintf(stderr, "Usage: %s <infile>\n", exec_name); - exit(EXIT_FAILURE); -} - -int main(int argc, char **argv) { - int frame_cnt = 0; - FILE *outfile[MAX_LAYERS]; - char filename[80]; - aom_codec_ctx_t codec; - const AvxInterface *decoder = NULL; - FILE *inputfile = NULL; - uint8_t *buf = NULL; - size_t bytes_in_buffer = 0; - size_t buffer_size = 0; - struct AvxInputContext aom_input_ctx; - struct ObuDecInputContext obu_ctx = { &aom_input_ctx, NULL, 0, 0, 0 }; - aom_codec_stream_info_t si; - uint8_t tmpbuf[32]; - unsigned int i; - - exec_name = argv[0]; - - if (argc != 2) die("Invalid number of arguments."); - - if (!(inputfile = fopen(argv[1], "rb"))) - die("Failed to open %s for read.", argv[1]); - obu_ctx.avx_ctx->file = inputfile; - obu_ctx.avx_ctx->filename = argv[1]; - - decoder = get_aom_decoder_by_index(0); - 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."); - - if (aom_codec_control(&codec, AV1D_SET_OUTPUT_ALL_LAYERS, 1)) { - die_codec(&codec, "Failed to set output_all_layers control."); - } - - // peak sequence header OBU to get number of spatial layers - const size_t ret = fread(tmpbuf, 1, 32, inputfile); - if (ret != 32) die_codec(&codec, "Input is not a valid obu file"); - si.is_annexb = 0; - if (aom_codec_peek_stream_info(decoder->codec_interface(), tmpbuf, 32, &si)) { - die_codec(&codec, "Input is not a valid obu file"); - } - fseek(inputfile, -32, SEEK_CUR); - - if (!file_is_obu(&obu_ctx)) - die_codec(&codec, "Input is not a valid obu file"); - - // open base layer output yuv file - snprintf(filename, sizeof(filename), "out_lyr%d.yuv", 0); - if (!(outfile[0] = fopen(filename, "wb"))) - die("Failed top open output for writing."); - - // open any enhancement layer output yuv files - for (i = 1; i < si.number_spatial_layers; i++) { - snprintf(filename, sizeof(filename), "out_lyr%d.yuv", i); - if (!(outfile[i] = fopen(filename, "wb"))) - die("Failed to open output for writing."); - } - - while (!obudec_read_temporal_unit(&obu_ctx, &buf, &bytes_in_buffer, - &buffer_size)) { - aom_codec_iter_t iter = NULL; - aom_image_t *img = NULL; - if (aom_codec_decode(&codec, buf, bytes_in_buffer, NULL)) - die_codec(&codec, "Failed to decode frame."); - - while ((img = aom_codec_get_frame(&codec, &iter)) != NULL) { - aom_image_t *img_shifted = - aom_img_alloc(NULL, AOM_IMG_FMT_I420, img->d_w, img->d_h, 16); - img_shifted->bit_depth = 8; - aom_img_downshift(img_shifted, img, - img->bit_depth - img_shifted->bit_depth); - if (img->spatial_id == 0) { - printf("Writing base layer 0 %d\n", frame_cnt); - aom_img_write(img_shifted, outfile[0]); - } else if (img->spatial_id <= (int)(si.number_spatial_layers - 1)) { - printf("Writing enhancement layer %d %d\n", img->spatial_id, frame_cnt); - aom_img_write(img_shifted, outfile[img->spatial_id]); - } else { - die_codec(&codec, "Invalid bitstream. Layer id exceeds layer count"); - } - if (img->spatial_id == (int)(si.number_spatial_layers - 1)) ++frame_cnt; - } - } - - printf("Processed %d frames.\n", frame_cnt); - if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec"); - - for (i = 0; i < si.number_spatial_layers; i++) fclose(outfile[i]); - - fclose(inputfile); - - return EXIT_SUCCESS; -} |