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Commit f06de3b0 authored by Tom Finegan's avatar Tom Finegan
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Remove decode_with_partial_drops example. 

Bitrotted and non-functional. Does one of two things: Crashes or reports
errors and quits.

Change-Id: Ia9c391ecd6e716b183d925247bf3dc0509ce4586
parent cc5eee12
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examples.mk
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......@@ -146,11 +146,6 @@ decode_with_drops.SRCS += vpx_ports/mem_ops_aligned.h
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
......
examples/decode_with_partial_drops.c deleted 100644 → 0
+ 0
− 328
View file @ cc5eee12
/*
* 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;
}
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