libvpx: Pull from upstream

source/libvpx/examples/decode_with_partial_drops.c

Index: source/libvpx/examples/decode_with_partial_drops.c
===================================================================
--- source/libvpx/examples/decode_with_partial_drops.c	(revision 271012)
+++ source/libvpx/examples/decode_with_partial_drops.c	(working copy)
@@ -1,328 +0,0 @@
-/*
- *  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;
-}