68 #define OFFSET(x) offsetof(ChannelMapContext, x) 69 #define A AV_OPT_FLAG_AUDIO_PARAM 70 #define F AV_OPT_FLAG_FILTERING_PARAM 72 {
"map",
"A comma-separated list of input channel numbers in output order.",
74 {
"channel_layout",
"Output channel layout.",
82 char *next = strchr(message, delim);
95 next =
split(*map, delim);
96 if (!next && delim ==
'-')
99 sscanf(*map,
"%d%n", ch, &n);
102 if (*ch < 0 || *ch > max_ch)
110 char *next =
split(*map, delim);
111 if (!next && delim ==
'-')
123 char *mapping, separator =
'|';
127 uint64_t out_ch_mask = 0;
135 char *dash = strchr(mapping,
'-');
157 while ((sep = strchr(sep, separator))) {
163 if (map_entries >
MAX_CH) {
168 for (i = 0; i < map_entries; i++) {
169 int in_ch_idx = -1, out_ch_idx = -1;
170 uint64_t in_ch = 0, out_ch = 0;
171 static const char err[] =
"Failed to parse channel map\n";
182 if (
get_channel(&mapping, &in_ch, separator) < 0) {
201 out_ch & out_ch_mask) {
207 out_ch_mask |= out_ch;
221 out_ch & out_ch_mask) {
227 out_ch_mask |= out_ch;
232 s->
nch = map_entries;
246 for (i = 0; i < s->
nch; i++) {
250 }
else if (out_ch_mask && out_ch_mask != fmt) {
253 "Output channel layout '%s' does not match the list of channel mapped: '%s'.\n",
258 "Output channel layout %s does not match the number of channels mapped %d.\n",
266 "cannot be guessed from the maps.\n");
271 for (i = 0; i < s->
nch; i++) {
302 const int nch_in = inlink->
channels;
303 const int nch_out = s->
nch;
308 nch_in *
sizeof(source_planes[0]));
310 if (nch_out > nch_in) {
314 if (!new_extended_data) {
330 for (ch = 0; ch < nch_out; ch++) {
352 char layout_name[256];
354 for (i = 0; i < s->
nch; i++) {
368 "input channel '%s' not available from input layout '%s'\n",
369 channel_name, layout_name);
372 "input channel #%d not available from input layout '%s'\n",
402 .
name =
"channelmap",
407 .priv_class = &channelmap_class,
408 .
inputs = avfilter_af_channelmap_inputs,
409 .
outputs = avfilter_af_channelmap_outputs,
AVFILTER_DEFINE_CLASS(channelmap)
static av_const int av_isdigit(int c)
Locale-independent conversion of ASCII isdigit.
uint64_t in_channel
layout describing the input channel
This structure describes decoded (raw) audio or video data.
Main libavfilter public API header.
AVFilter ff_af_channelmap
static const AVOption channelmap_options[]
AVFilterFormatsConfig outcfg
Lists of supported formats / etc.
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
const char * name
Pad name.
uint64_t av_get_channel_layout(const char *name)
Return a channel layout id that matches name, or 0 if no match is found.
AVFilterLink ** inputs
array of pointers to input links
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
static int channelmap_filter_frame(AVFilterLink *inlink, AVFrame *buf)
char * channel_layout_str
static int channelmap_query_formats(AVFilterContext *ctx)
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.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#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
static char * split(char *message, char delim)
uint64_t channel_layout
Channel layout of the audio data.
int channels
number of audio channels, only used for audio.
audio channel layout utility functions
static const AVFilterPad outputs[]
#define FF_ARRAY_ELEMS(a)
int in_channel_idx
index of in_channel in the input stream data
A list of supported channel layouts.
void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, uint64_t channel_layout)
Return a description of a channel layout.
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
struct ChannelMap map[MAX_CH]
static const uint16_t channel_layouts[7]
Describe the class of an AVClass context structure.
uint64_t out_channel
layout describing the output channel
const char * name
Filter name.
const VDPAUPixFmtMap * map
AVFilterLink ** outputs
array of pointers to output links
int av_get_channel_layout_channel_index(uint64_t channel_layout, uint64_t channel)
Get the index of a channel in channel_layout.
static int channelmap_config_input(AVFilterLink *inlink)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
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
static const AVFilterPad avfilter_af_channelmap_inputs[]
static int get_channel_idx(char **map, int *ch, char delim, int max_ch)
common internal and external API header
uint64_t channel_layout
channel layout of current buffer (see libavutil/channel_layout.h)
int channels
Number of channels.
AVFilterFormatsConfig incfg
Lists of supported formats / etc.
const char * av_get_channel_name(uint64_t channel)
Get the name of a given channel.
AVFilterContext * dst
dest filter
static int get_channel(char **map, uint64_t *ch, char delim)
int64_t av_get_default_channel_layout(int nb_channels)
Return default channel layout for a given number of channels.
static av_cold int channelmap_init(AVFilterContext *ctx)
static const AVFilterPad avfilter_af_channelmap_outputs[]
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
uint8_t ** extended_data
pointers to the data planes/channels.
mode
Use these values in ebur128_init (or'ed).
void * av_mallocz_array(size_t nmemb, size_t size)