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Code Issues Releases Activity

af_channelmap: switch to an AVOptions-based system.

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This commit is contained in:
Anton Khirnov 2013-02-25 21:21:29 +01:00
parent b2b25b0659
commit ba8efac977
3 changed files with 22 additions and 27 deletions
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6
doc/filters.texi
View File

@ -310,7 +310,7 @@ This filter accepts the following named parameters:
Channel layout of the output stream.
@item map
Map channels from input to output. The argument is a comma-separated list of
Map channels from input to output. The argument is a '|'-separated list of
mappings, each in the @code{@var{in_channel}-@var{out_channel}} or
@var{in_channel} form. @var{in_channel} can be either the name of the input
channel (e.g. FL for front left) or its index in the input channel layout.
@ -324,14 +324,14 @@ output channels preserving index.
For example, assuming a 5.1+downmix input MOV file
@example
avconv -i in.mov -filter 'channelmap=map=DL-FL\,DR-FR' out.wav
avconv -i in.mov -filter 'channelmap=map=DL-FL|DR-FR' out.wav
@end example
will create an output WAV file tagged as stereo from the downmix channels of
the input.
To fix a 5.1 WAV improperly encoded in AAC's native channel order
@example
avconv -i in.wav -filter 'channelmap=1\,2\,0\,5\,3\,4:channel_layout=5.1' out.wav
avconv -i in.wav -filter 'channelmap=1|2|0|5|3|4:channel_layout=5.1' out.wav
@end example
@section join

41
libavfilter/af_channelmap.c
View File

@ -123,26 +123,13 @@ static av_cold int channelmap_init(AVFilterContext *ctx, const char *args)
{
ChannelMapContext *s = ctx->priv;
int ret;
char *mapping;
char *mapping, separator = '|';
int map_entries = 0;
char buf[256];
enum MappingMode mode;
uint64_t out_ch_mask = 0;
int i;
if (!args) {
av_log(ctx, AV_LOG_ERROR, "No parameters supplied.\n");
return AVERROR(EINVAL);
}
s->class = &channelmap_class;
av_opt_set_defaults(s);
if ((ret = av_set_options_string(s, args, "=", ":")) < 0) {
av_log(ctx, AV_LOG_ERROR, "Error parsing options string '%s'.\n", args);
return ret;
}
mapping = s->mapping_str;
if (!mapping) {
@ -165,13 +152,20 @@ static av_cold int channelmap_init(AVFilterContext *ctx, const char *args)
else
mode = MAP_PAIR_STR_STR;
}
#if FF_API_OLD_FILTER_OPTS
if (strchr(mapping, ',')) {
av_log(ctx, AV_LOG_WARNING, "This syntax is deprecated, use "
"'|' to separate the mappings.\n");
separator = ',';
}
#endif
}
if (mode != MAP_NONE) {
char *comma = mapping;
char *sep = mapping;
map_entries = 1;
while ((comma = strchr(comma, ','))) {
if (*++comma) // Allow trailing comma
while ((sep = strchr(sep, separator))) {
if (*++sep) // Allow trailing comma
map_entries++;
}
}
@ -188,7 +182,7 @@ static av_cold int channelmap_init(AVFilterContext *ctx, const char *args)
static const char err[] = "Failed to parse channel map\n";
switch (mode) {
case MAP_ONE_INT:
if (get_channel_idx(&mapping, &in_ch_idx, ',', MAX_CH) < 0) {
if (get_channel_idx(&mapping, &in_ch_idx, separator, MAX_CH) < 0) {
ret = AVERROR(EINVAL);
av_log(ctx, AV_LOG_ERROR, err);
goto fail;
@ -197,7 +191,7 @@ static av_cold int channelmap_init(AVFilterContext *ctx, const char *args)
s->map[i].out_channel_idx = i;
break;
case MAP_ONE_STR:
if (!get_channel(&mapping, &in_ch, ',')) {
if (!get_channel(&mapping, &in_ch, separator)) {
av_log(ctx, AV_LOG_ERROR, err);
ret = AVERROR(EINVAL);
goto fail;
@ -207,7 +201,7 @@ static av_cold int channelmap_init(AVFilterContext *ctx, const char *args)
break;
case MAP_PAIR_INT_INT:
if (get_channel_idx(&mapping, &in_ch_idx, '-', MAX_CH) < 0 ||
get_channel_idx(&mapping, &out_ch_idx, ',', MAX_CH) < 0) {
get_channel_idx(&mapping, &out_ch_idx, separator, MAX_CH) < 0) {
av_log(ctx, AV_LOG_ERROR, err);
ret = AVERROR(EINVAL);
goto fail;
@ -217,7 +211,7 @@ static av_cold int channelmap_init(AVFilterContext *ctx, const char *args)
break;
case MAP_PAIR_INT_STR:
if (get_channel_idx(&mapping, &in_ch_idx, '-', MAX_CH) < 0 ||
get_channel(&mapping, &out_ch, ',') < 0 ||
get_channel(&mapping, &out_ch, separator) < 0 ||
out_ch & out_ch_mask) {
av_log(ctx, AV_LOG_ERROR, err);
ret = AVERROR(EINVAL);
@ -229,7 +223,7 @@ static av_cold int channelmap_init(AVFilterContext *ctx, const char *args)
break;
case MAP_PAIR_STR_INT:
if (get_channel(&mapping, &in_ch, '-') < 0 ||
get_channel_idx(&mapping, &out_ch_idx, ',', MAX_CH) < 0) {
get_channel_idx(&mapping, &out_ch_idx, separator, MAX_CH) < 0) {
av_log(ctx, AV_LOG_ERROR, err);
ret = AVERROR(EINVAL);
goto fail;
@ -239,7 +233,7 @@ static av_cold int channelmap_init(AVFilterContext *ctx, const char *args)
break;
case MAP_PAIR_STR_STR:
if (get_channel(&mapping, &in_ch, '-') < 0 ||
get_channel(&mapping, &out_ch, ',') < 0 ||
get_channel(&mapping, &out_ch, separator) < 0 ||
out_ch & out_ch_mask) {
av_log(ctx, AV_LOG_ERROR, err);
ret = AVERROR(EINVAL);
@ -409,6 +403,7 @@ AVFilter avfilter_af_channelmap = {
.init = channelmap_init,
.query_formats = channelmap_query_formats,
.priv_size = sizeof(ChannelMapContext),
.priv_class = &channelmap_class,
.inputs = avfilter_af_channelmap_inputs,
.outputs = avfilter_af_channelmap_outputs,

2
tests/filtergraphs/channelmap
View File

@ -1 +1 @@
channelmap=map=1\,2\,0\,5\,3\,4:channel_layout=5.1
channelmap=map=1|2|0|5|3|4:channel_layout=5.1