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Merge "Cleaning up md5 example."

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This commit is contained in:
Dmitry Kovalev
2014-01-14 15:10:27 -08:00
committed by Gerrit Code Review
parent 382470db42 a31dd326ea
commit 497b6a633d
1 changed files with 53 additions and 51 deletions
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104
examples/decode_to_md5.c
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@@ -66,81 +66,83 @@ static void die_codec(vpx_codec_ctx_t *ctx, const char *s) {
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
static void get_image_md5(const vpx_image_t *img, unsigned char md5_sum[16]) {
int plane, y;
MD5Context md5;
MD5Init(&md5);
for (plane = 0; plane < 3; ++plane) {
const unsigned char *buf = img->planes[plane];
const int stride = img->stride[plane];
const int w = plane ? (img->d_w + 1) >> 1 : img->d_w;
const int h = plane ? (img->d_h + 1) >> 1 : img->d_h;
for (y = 0; y < h; ++y) {
MD5Update(&md5, buf, w);
buf += stride;
}
}
MD5Final(md5_sum, &md5);
}
int main(int argc, char **argv) { int main(int argc, char **argv) {
FILE *infile, *outfile; FILE *infile, *outfile;
vpx_codec_ctx_t codec; vpx_codec_ctx_t codec;
int flags = 0, frame_cnt = 0; int flags = 0, frame_cnt = 0;
unsigned char file_hdr[IVF_FILE_HDR_SZ]; unsigned char file_hdr[IVF_FILE_HDR_SZ];
unsigned char frame_hdr[IVF_FRAME_HDR_SZ]; unsigned char frame_hdr[IVF_FRAME_HDR_SZ];
unsigned char frame[256*1024]; unsigned char frame[256 * 1024];
vpx_codec_err_t res;
(void)res; if (argc != 3)
/* Open files */
if(argc!=3)
die("Usage: %s <infile> <outfile>\n", argv[0]); die("Usage: %s <infile> <outfile>\n", argv[0]);
if(!(infile = fopen(argv[1], "rb")))
if (!(infile = fopen(argv[1], "rb")))
die("Failed to open %s for reading", argv[1]); die("Failed to open %s for reading", argv[1]);
if(!(outfile = fopen(argv[2], "wb")))
if (!(outfile = fopen(argv[2], "wb")))
die("Failed to open %s for writing", argv[2]); 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 &&
if(!(fread(file_hdr, 1, IVF_FILE_HDR_SZ, infile) == IVF_FILE_HDR_SZ file_hdr[0] == 'D' && file_hdr[1] == 'K' &&
&& file_hdr[0]=='D' && file_hdr[1]=='K' && file_hdr[2]=='I' file_hdr[2] == 'I' && file_hdr[3] == 'F'))
&& file_hdr[3]=='F'))
die("%s is not an IVF file.", argv[1]); die("%s is not an IVF file.", argv[1]);
printf("Using %s\n",vpx_codec_iface_name(interface)); printf("Using %s\n",vpx_codec_iface_name(interface));
/* Initialize codec */
if(vpx_codec_dec_init(&codec, interface, NULL, flags)) if (vpx_codec_dec_init(&codec, interface, NULL, flags))
die_codec(&codec, "Failed to initialize decoder"); die_codec(&codec, "Failed to initialize decoder");
/* Read each frame */ while (fread(frame_hdr, 1, IVF_FRAME_HDR_SZ, infile) == IVF_FRAME_HDR_SZ) {
while(fread(frame_hdr, 1, IVF_FRAME_HDR_SZ, infile) == IVF_FRAME_HDR_SZ) { const int frame_size = mem_get_le32(frame_hdr);
int frame_sz = mem_get_le32(frame_hdr); vpx_codec_iter_t iter = NULL;
vpx_codec_iter_t iter = NULL; vpx_image_t *img;
vpx_image_t *img;
frame_cnt++; frame_cnt++;
if(frame_sz > sizeof(frame)) if (frame_size > sizeof(frame))
die("Frame %d data too big for example code buffer", frame_sz); die("Frame %d data too big for example code buffer", frame_size);
if(fread(frame, 1, frame_sz, infile) != frame_sz)
if (fread(frame, 1, frame_size, infile) != frame_size)
die("Frame %d failed to read complete frame", frame_cnt); die("Frame %d failed to read complete frame", frame_cnt);
/* Decode the frame */ if (vpx_codec_decode(&codec, frame, frame_size, NULL, 0))
if(vpx_codec_decode(&codec, frame, frame_sz, NULL, 0))
die_codec(&codec, "Failed to decode frame"); die_codec(&codec, "Failed to decode frame");
/* Write decoded data to disk */ while ((img = vpx_codec_get_frame(&codec, &iter)) != NULL) {
while((img = vpx_codec_get_frame(&codec, &iter))) { int i;
unsigned int plane, y; unsigned char md5_sum[16];
unsigned char md5_sum[16]; get_image_md5(img, md5_sum);
MD5Context md5; for (i = 0; i < 16; ++i)
int i; fprintf(outfile, "%02x", md5_sum[i]);
MD5Init(&md5);
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++) {
MD5Update(&md5, buf, (plane ? (img->d_w + 1) >> 1 : img->d_w));
buf += img->stride[plane];
}
}
MD5Final(md5_sum, &md5);
for (i = 0; i < 16; i++)
fprintf(outfile, "%02x",md5_sum[i]);
fprintf(outfile, " img-%dx%d-%04d.i420\n", img->d_w, img->d_h, fprintf(outfile, " img-%dx%d-%04d.i420\n", img->d_w, img->d_h,
frame_cnt); frame_cnt);
} }
} }
printf("Processed %d frames.\n",frame_cnt); printf("Processed %d frames.\n", frame_cnt);
if(vpx_codec_destroy(&codec)) if (vpx_codec_destroy(&codec))
die_codec(&codec, "Failed to destroy codec"); die_codec(&codec, "Failed to destroy codec");
fclose(outfile); fclose(outfile);