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; |
-} |