ref: dd59cb07d9144eb75cc93c2a0d8cc581a47d8bbd
parent: 94d069274016f1d6a79a24ccdbf2b4833e36800a
parent: f06de3b0a6ef59f1ebfeb90cd5d46e2cc3416863
author: Tom Finegan <tomfinegan@google.com>
date: Thu May 8 11:54:46 EDT 2014
Merge "Remove decode_with_partial_drops example."
--- a/examples.mk
+++ b/examples.mk
@@ -146,11 +146,6 @@
endif
decode_with_drops.GUID = CE5C53C4-8DDA-438A-86ED-0DDD3CDB8D26
decode_with_drops.DESCRIPTION = Drops frames while decoding
-ifeq ($(CONFIG_VP8_DECODER),yes)
-EXAMPLES-$(CONFIG_ERROR_CONCEALMENT) += decode_with_partial_drops.c
-endif
-decode_with_partial_drops.GUID = 61C2D026-5754-46AC-916F-1343ECC5537E
-decode_with_partial_drops.DESCRIPTION = Drops parts of frames while decoding
EXAMPLES-$(CONFIG_ENCODERS) += set_maps.c
set_maps.SRCS += ivfenc.h ivfenc.c
set_maps.SRCS += tools_common.h tools_common.c
--- a/examples/decode_with_partial_drops.c
+++ /dev/null
@@ -1,328 +1,0 @@
-/*
- * 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.
- */
-
-// Decode With Partial Drops Example
-// =========================
-//
-// This is an example utility which drops a series of frames (or parts of
-// frames), as specified on the command line. This is useful for observing the
-// error recovery features of the codec.
-//
-// Usage
-// -----
-// This example adds a single argument to the `simple_decoder` example,
-// which specifies the range or pattern of frames to drop. The parameter is
-// parsed as follows.
-//
-// Dropping A Range Of Frames
-// --------------------------
-// To drop a range of frames, specify the starting frame and the ending
-// frame to drop, separated by a dash. The following command will drop
-// frames 5 through 10 (base 1).
-//
-// $ ./decode_with_partial_drops in.ivf out.i420 5-10
-//
-//
-// Dropping A Pattern Of Frames
-// ----------------------------
-// To drop a pattern of frames, specify the number of frames to drop and
-// the number of frames after which to repeat the pattern, separated by
-// a forward-slash. The following command will drop 3 of 7 frames.
-// Specifically, it will decode 4 frames, then drop 3 frames, and then
-// repeat.
-//
-// $ ./decode_with_partial_drops in.ivf out.i420 3/7
-//
-// Dropping Random Parts Of Frames
-// -------------------------------
-// A third argument tuple is available to split the frame into 1500 bytes pieces
-// and randomly drop pieces rather than frames. The frame will be split at
-// partition boundaries where possible. The following example will seed the RNG
-// with the seed 123 and drop approximately 5% of the pieces. Pieces which
-// are depending on an already dropped piece will also be dropped.
-//
-// $ ./decode_with_partial_drops in.ivf out.i420 5,123
-//
-// Extra Variables
-// ---------------
-// This example maintains the pattern passed on the command line in the
-// `n`, `m`, and `is_range` variables:
-//
-// Making The Drop Decision
-// ------------------------
-// The example decides whether to drop the frame based on the current
-// frame number, immediately before decoding the frame.
-
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#define VPX_CODEC_DISABLE_COMPAT 1
-#include "./vpx_config.h"
-#include "vpx/vp8dx.h"
-#include "vpx/vpx_decoder.h"
-#define interface (vpx_codec_vp8_dx())
-#include <time.h>
-
-
-#define IVF_FILE_HDR_SZ (32)
-#define IVF_FRAME_HDR_SZ (12)
-
-static unsigned int mem_get_le32(const unsigned char *mem) {- return (mem[3] << 24)|(mem[2] << 16)|(mem[1] << 8)|(mem[0]);
-}
-
-static void die(const char *fmt, ...) {- va_list ap;
-
- va_start(ap, fmt);
- vprintf(fmt, ap);
- if(fmt[strlen(fmt)-1] != '\n')
- printf("\n");- exit(EXIT_FAILURE);
-}
-
-static void die_codec(vpx_codec_ctx_t *ctx, const char *s) {- const char *detail = vpx_codec_error_detail(ctx);
-
- printf("%s: %s\n", s, vpx_codec_error(ctx));- if(detail)
- printf(" %s\n",detail);- exit(EXIT_FAILURE);
-}
-
-struct parsed_header
-{- char key_frame;
- int version;
- char show_frame;
- int first_part_size;
-};
-
-int next_packet(struct parsed_header* hdr, int pos, int length, int mtu)
-{- int size = 0;
- int remaining = length - pos;
- /* Uncompressed part is 3 bytes for P frames and 10 bytes for I frames */
- int uncomp_part_size = (hdr->key_frame ? 10 : 3);
- /* number of bytes yet to send from header and the first partition */
- int remainFirst = uncomp_part_size + hdr->first_part_size - pos;
- if (remainFirst > 0)
- {- if (remainFirst <= mtu)
- {- size = remainFirst;
- }
- else
- {- size = mtu;
- }
-
- return size;
- }
-
- /* second partition; just slot it up according to MTU */
- if (remaining <= mtu)
- {- size = remaining;
- return size;
- }
- return mtu;
-}
-
-void throw_packets(unsigned char* frame, int* size, int loss_rate,
- int* thrown, int* kept)
-{- unsigned char loss_frame[256*1024];
- int pkg_size = 1;
- int pos = 0;
- int loss_pos = 0;
- struct parsed_header hdr;
- unsigned int tmp;
- int mtu = 1500;
-
- if (*size < 3)
- {- return;
- }
- putc('|', stdout);- /* parse uncompressed 3 bytes */
- tmp = (frame[2] << 16) | (frame[1] << 8) | frame[0];
- hdr.key_frame = !(tmp & 0x1); /* inverse logic */
- hdr.version = (tmp >> 1) & 0x7;
- hdr.show_frame = (tmp >> 4) & 0x1;
- hdr.first_part_size = (tmp >> 5) & 0x7FFFF;
-
- /* don't drop key frames */
- if (hdr.key_frame)
- {- int i;
- *kept = *size/mtu + ((*size % mtu > 0) ? 1 : 0); /* approximate */
- for (i=0; i < *kept; i++)
- putc('.', stdout);- return;
- }
-
- while ((pkg_size = next_packet(&hdr, pos, *size, mtu)) > 0)
- {- int loss_event = ((rand() + 1.0)/(RAND_MAX + 1.0) < loss_rate/100.0);
- if (*thrown == 0 && !loss_event)
- {- memcpy(loss_frame + loss_pos, frame + pos, pkg_size);
- loss_pos += pkg_size;
- (*kept)++;
- putc('.', stdout);- }
- else
- {- (*thrown)++;
- putc('X', stdout);- }
- pos += pkg_size;
- }
- memcpy(frame, loss_frame, loss_pos);
- memset(frame + loss_pos, 0, *size - loss_pos);
- *size = loss_pos;
-}
-
-int main(int argc, char **argv) {- FILE *infile, *outfile;
- vpx_codec_ctx_t codec;
- int flags = 0, frame_cnt = 0;
- unsigned char file_hdr[IVF_FILE_HDR_SZ];
- unsigned char frame_hdr[IVF_FRAME_HDR_SZ];
- unsigned char frame[256*1024];
- vpx_codec_err_t res;
- int n, m, mode;
- unsigned int seed;
- int thrown=0, kept=0;
- int thrown_frame=0, kept_frame=0;
- vpx_codec_dec_cfg_t dec_cfg = {0};-
- (void)res;
- /* Open files */
- if(argc < 4 || argc > 6)
- die("Usage: %s <infile> <outfile> [-t <num threads>] <N-M|N/M|L,S>\n",- argv[0]);
- {- char *nptr;
- int arg_num = 3;
- if (argc == 6 && strncmp(argv[arg_num++], "-t", 2) == 0)
- dec_cfg.threads = strtol(argv[arg_num++], NULL, 0);
- n = strtol(argv[arg_num], &nptr, 0);
- mode = (*nptr == '\0' || *nptr == ',') ? 2 : (*nptr == '-') ? 1 : 0;
-
- m = strtol(nptr+1, NULL, 0);
- if((!n && !m) || (*nptr != '-' && *nptr != '/' &&
- *nptr != '\0' && *nptr != ','))
- die("Couldn't parse pattern %s\n", argv[3]);- }
- seed = (m > 0) ? m : (unsigned int)time(NULL);
- srand(seed);thrown_frame = 0;
- printf("Seed: %u\n", seed);- printf("Threads: %d\n", dec_cfg.threads);- if(!(infile = fopen(argv[1], "rb")))
- die("Failed to open %s for reading", argv[1]);- if(!(outfile = fopen(argv[2], "wb")))
- die("Failed to open %s for writing", argv[2]);-
- /* Read file header */
- if(!(fread(file_hdr, 1, IVF_FILE_HDR_SZ, infile) == IVF_FILE_HDR_SZ
- && file_hdr[0]=='D' && file_hdr[1]=='K' && file_hdr[2]=='I'
- && file_hdr[3]=='F'))
- die("%s is not an IVF file.", argv[1]);-
- printf("Using %s\n",vpx_codec_iface_name(interface));- /* Initialize codec */
- flags = VPX_CODEC_USE_ERROR_CONCEALMENT;
- res = vpx_codec_dec_init(&codec, interface, &dec_cfg, flags);
- if(res)
- die_codec(&codec, "Failed to initialize decoder");
-
-
- /* Read each frame */
- while(fread(frame_hdr, 1, IVF_FRAME_HDR_SZ, infile) == IVF_FRAME_HDR_SZ) {- int frame_sz = mem_get_le32(frame_hdr);
- vpx_codec_iter_t iter = NULL;
- vpx_image_t *img;
-
-
- frame_cnt++;
- if(frame_sz > sizeof(frame))
- die("Frame %d data too big for example code buffer", frame_sz);- if(fread(frame, 1, frame_sz, infile) != frame_sz)
- die("Frame %d failed to read complete frame", frame_cnt);-
- /* Decide whether to throw parts of the frame or the whole frame
- depending on the drop mode */
- thrown_frame = 0;
- kept_frame = 0;
- switch (mode)
- {- case 0:
- if (m - (frame_cnt-1)%m <= n)
- {- frame_sz = 0;
- }
- break;
- case 1:
- if (frame_cnt >= n && frame_cnt <= m)
- {- frame_sz = 0;
- }
- break;
- case 2:
- throw_packets(frame, &frame_sz, n, &thrown_frame, &kept_frame);
- break;
- default: break;
- }
- if (mode < 2)
- {- if (frame_sz == 0)
- {- putc('X', stdout);- thrown_frame++;
- }
- else
- {- putc('.', stdout);- kept_frame++;
- }
- }
- thrown += thrown_frame;
- kept += kept_frame;
- fflush(stdout);
- /* Decode the frame */
- if(vpx_codec_decode(&codec, frame, frame_sz, NULL, 0))
- die_codec(&codec, "Failed to decode frame");
-
- /* Write decoded data to disk */
- while((img = vpx_codec_get_frame(&codec, &iter))) {- unsigned int plane, y;
-
- for(plane=0; plane < 3; plane++) {- unsigned char *buf =img->planes[plane];
-
- for(y=0; y < (plane ? (img->d_h + 1) >> 1 : img->d_h); y++) {- (void) fwrite(buf, 1, (plane ? (img->d_w + 1) >> 1 : img->d_w),
- outfile);
- buf += img->stride[plane];
- }
- }
- }
- }
- printf("Processed %d frames.\n",frame_cnt);- if(vpx_codec_destroy(&codec))
- die_codec(&codec, "Failed to destroy codec");
-
- fclose(outfile);
- fclose(infile);
- return EXIT_SUCCESS;
-}