43 #define OFFSET(x) offsetof(ZMQContext, x) 44 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM 55 zmq->
zmq = zmq_ctx_new();
58 "Could not create ZMQ context: %s\n", zmq_strerror(errno));
65 "Could not create ZMQ socket: %s\n", zmq_strerror(errno));
71 "Could not bind ZMQ socket to address '%s': %s\n",
85 zmq_ctx_destroy(zmq->
zmq);
92 #define SPACES " \f\t\n\r" 96 const char **buf = &command_str;
101 "No target specified in command '%s'\n", command_str);
108 "No command specified in command '%s'\n", command_str);
122 if (zmq_msg_init(&msg) == -1) {
124 "Could not initialize receive message: %s\n", zmq_strerror(errno));
128 if (zmq_msg_recv(&msg, zmq->
responder, ZMQ_DONTWAIT) == -1) {
131 "Could not receive message: %s\n", zmq_strerror(errno));
136 *buf_size = zmq_msg_size(&msg) + 1;
142 memcpy(*buf, zmq_msg_data(&msg), *buf_size - 1);
143 (*buf)[*buf_size-1] = 0;
157 char *recv_buf, *send_buf;
163 if (
recv_msg(ctx, &recv_buf, &recv_buf_size) < 0)
175 "Processing command #%d target:%s command:%s arg:%s\n",
179 cmd_buf,
sizeof(cmd_buf),
182 -ret,
av_err2str(ret), cmd_buf[0] ?
"\n" :
"", cmd_buf);
188 "Sending command reply for command #%d:\n%s\n",
190 if (zmq_send(zmq->
responder, send_buf, strlen(send_buf), 0) == -1)
206 #if CONFIG_ZMQ_FILTER 208 #define zmq_options options 230 .description =
NULL_IF_CONFIG_SMALL(
"Receive commands through ZMQ and broker them to filters."),
236 .priv_class = &zmq_class,
241 #if CONFIG_AZMQ_FILTER 243 #define azmq_options options 265 .description =
NULL_IF_CONFIG_SMALL(
"Receive commands through ZMQ and broker them to filters."),
271 .priv_class = &azmq_class,
This structure describes decoded (raw) audio or video data.
#define AV_LOG_WARNING
Something somehow does not look correct.
Main libavfilter public API header.
static av_cold int init(AVFilterContext *ctx)
static int filter_frame(AVFilterLink *inlink, AVFrame *ref)
const char * name
Pad name.
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
#define AV_LOG_VERBOSE
Detailed information.
static int recv_msg(AVFilterContext *ctx, char **buf, int *buf_size)
A filter pad used for either input or output.
A link between two filters.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static const AVOption options[]
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
void * priv
private data for use by the filter
char * av_get_token(const char **buf, const char *term)
Unescape the given string until a non escaped terminating char, and return the token corresponding to...
char * av_asprintf(const char *fmt,...)
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
#define AVFILTER_CMD_FLAG_ONE
Stop once a filter understood the command (for target=all for example), fast filters are favored auto...
static const AVFilterPad outputs[]
static int command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Describe the class of an AVClass context structure.
const char * name
Filter name.
AVFilterLink ** outputs
array of pointers to output links
static void av_cold uninit(AVFilterContext *ctx)
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
struct AVFilterGraph * graph
Graph the filter belongs to.
static int ref[MAX_W *MAX_W]
static int parse_command(Command *cmd, const char *command_str, void *log_ctx)
int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
Send a command to one or more filter instances.
AVFilterContext * dst
dest filter
#define AVFILTER_DEFINE_CLASS(fname)
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
#define AVERROR_EXTERNAL
Generic error in an external library.