51 printf(
"usage: ffhash [b64:]algorithm [input]...\n");
52 printf(
"Supported hash algorithms:");
79 int fd,
flags = O_RDONLY;
85 if (file) fd = open(file, flags);
100 printf(
"+READ-FAILED: %s", strerror(err));
118 int main(
int argc,
char **argv)
122 const char *hash_name;
134 printf(
"Invalid hash type: %s\n", hash_name);
137 printf(
"%s\n", strerror(errno));
143 for (i = 2; i < argc; i++)
144 ret |=
check(argv[i]);
void av_hash_final_b64(struct AVHashContext *ctx, uint8_t *dst, int size)
Finalize a hash context and store the Base64 representation of the actual hash value as a string...
Memory handling functions.
static struct AVHashContext * hash
#define AV_HASH_MAX_SIZE
Maximum value that av_hash_get_size() will currently return.
static av_cold int end(AVCodecContext *avctx)
static int check(char *file)
int main(int argc, char **argv)
void av_hash_init(AVHashContext *ctx)
Initialize or reset a hash context.
int av_hash_alloc(AVHashContext **ctx, const char *name)
Allocate a hash context for the algorithm specified by name.
const char * av_hash_names(int i)
Get the names of available hash algorithms.
const char * av_hash_get_name(const AVHashContext *ctx)
void av_hash_update(AVHashContext *ctx, const uint8_t *src, int len)
Update a hash context with additional data.
void av_hash_freep(AVHashContext **ctx)
Free hash context and set hash context pointer to NULL.
void av_hash_final_hex(struct AVHashContext *ctx, uint8_t *dst, int size)
Finalize a hash context and store the hexadecimal representation of the actual hash value as a string...
#define flags(name, subs,...)
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
printf("static const uint8_t my_array[100] = {\n")
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions