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libmodplug: add metadata support.

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This commit is contained in:
Clément Bœsch 2011-10-06 01:19:02 +02:00
parent e6f937237a
commit c768e96668
1 changed files with 56 additions and 2 deletions
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58
libavformat/libmodplug.c
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@ -19,10 +19,10 @@
/**
* @file
* ModPlug demuxer
* @todo metadata
*/
#include <libmodplug/modplug.h>
#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "avformat.h"
@ -68,6 +68,59 @@ static const AVOption options[] = {
} \
} while (0)
#define ADD_META_MULTIPLE_ENTRIES(entry_name, fname) do { \
if (n_## entry_name ##s) { \
unsigned i, n = 0; \
\
for (i = 0; i < n_## entry_name ##s; i++) { \
char item_name[64] = {0}; \
fname(f, i, item_name); \
if (!*item_name) \
continue; \
if (n) \
av_dict_set(&s->metadata, #entry_name, "\n", AV_DICT_APPEND); \
av_dict_set(&s->metadata, #entry_name, item_name, AV_DICT_APPEND); \
n++; \
} \
\
extra = av_asprintf(", %u/%u " #entry_name "%s", \
n, n_## entry_name ##s, n > 1 ? "s" : ""); \
if (!extra) \
return AVERROR(ENOMEM); \
av_dict_set(&s->metadata, "extra info", extra, AV_DICT_APPEND); \
av_free(extra); \
} \
} while (0)
static int modplug_load_metadata(AVFormatContext *s)
{
ModPlugContext *modplug = s->priv_data;
ModPlugFile *f = modplug->f;
char *extra;
const char *name = ModPlug_GetName(f);
const char *msg = ModPlug_GetMessage(f);
unsigned n_instruments = ModPlug_NumInstruments(f);
unsigned n_samples = ModPlug_NumSamples(f);
unsigned n_patterns = ModPlug_NumPatterns(f);
unsigned n_channels = ModPlug_NumChannels(f);
if (name && *name) av_dict_set(&s->metadata, "name", name, 0);
if (msg && *msg) av_dict_set(&s->metadata, "message", msg, 0);
extra = av_asprintf("%u pattern%s, %u channel%s",
n_patterns, n_patterns > 1 ? "s" : "",
n_channels, n_channels > 1 ? "s" : "");
if (!extra)
return AVERROR(ENOMEM);
av_dict_set(&s->metadata, "extra info", extra, AV_DICT_DONT_STRDUP_VAL);
ADD_META_MULTIPLE_ENTRIES(instrument, ModPlug_InstrumentName);
ADD_META_MULTIPLE_ENTRIES(sample, ModPlug_SampleName);
return 0;
}
static int modplug_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
AVStream *st;
@ -127,7 +180,8 @@ static int modplug_read_header(AVFormatContext *s, AVFormatParameters *ap)
st->codec->codec_id = CODEC_ID_PCM_S16LE;
st->codec->channels = settings.mChannels;
st->codec->sample_rate = settings.mFrequency;
return 0;
return modplug_load_metadata(s);
}
static int modplug_read_packet(AVFormatContext *s, AVPacket *pkt)